CN103582077B - Inter-cell D2D communication method, UE and base station - Google Patents

Abstract

Translated fromChinese

本发明公开了一种小区间D2D通信的方法、UE和基站。该方法包括：第一小区内的第一UE获取第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID；该第一UE在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时；该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；该第一UE在该第二小区的D2D通信频率上以该发送定时发送消息，在该第一小区的D2D通信频率上接收该第二UE发送的消息。本发明实施例的小区间D2D通信的方法、UE和基站，能够实现小区间D2D通信。

The invention discloses a method for inter-cell D2D communication, a UE and a base station. The method includes: the first UE in the first cell acquires the second cell information, the second cell information includes: the D2D communication frequency and the cell ID of the second cell; the first UE is on the D2D communication frequency of the second cell Search for the downlink synchronization signal of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell; the first UE determines to send to the second cell in the second cell according to the downlink timing of the second cell The sending timing of the message sent by the UE; the first UE sends the message at the sending timing on the D2D communication frequency of the second cell, and receives the message sent by the second UE on the D2D communication frequency of the first cell. The inter-cell D2D communication method, UE and base station of the embodiments of the present invention can realize inter-cell D2D communication.

Description

Translated fromChinese

小区间D2D通信的方法、用户设备和基站Method for inter-cell D2D communication, user equipment and base station

技术领域technical field

本发明涉及通信领域，并且更具体地，涉及小区间D2D通信的方法、用户设备和基站。The present invention relates to the field of communication, and more specifically, to a method for D2D communication between cells, a user equipment and a base station.

背景技术Background technique

近20年来，无线通信技术获得了巨大的发展，无线通信技术也是层出不穷。无线通信网络以其巨大的灵活性越来越大的占据着人们的生活，成为人们生活中不可缺少的一部分。In the past 20 years, wireless communication technology has achieved great development, and wireless communication technology is also emerging in an endless stream. With its great flexibility, wireless communication network is increasingly occupying people's life and becoming an indispensable part of people's life.

然而，无线频谱资源有限，随着使用无线通信网络的人数激增以及对无线通信网络性能的要求日益提高，频谱资源紧张的缺点已经成为限制无线通信性能的关键所在。目前，蜂窝网是主要的无线通信网络，在这种通信中，两个终端通信需要经过基站转发，同一个数据包从终端到基站，再从基站到终端，占用空口资源两次。如果两个通信终端距离较远，则这种方案比较可行；但如果通信双方距离较近，相互在对方的通信范围内，则数据包直接通过终端之间传输，不需要经过基站转发，可以节省一半的资源。However, wireless spectrum resources are limited. With the rapid increase of the number of people using wireless communication networks and the increasing requirements for wireless communication network performance, the shortage of spectrum resources has become the key to limit wireless communication performance. At present, the cellular network is the main wireless communication network. In this communication, the communication between two terminals needs to be forwarded by the base station. The same data packet occupies the air interface resources twice from the terminal to the base station, and then from the base station to the terminal. If the two communication terminals are far away, this solution is more feasible; but if the two communication parties are relatively close and within the communication range of each other, the data packets are directly transmitted between the terminals without forwarding by the base station, which can save half of the resources.

终端与终端之间的直接通信(简称D2D通信，Device to Device，设备到设备)能够使终端设备之间直接通信而不需要任何中间的基础设施。因此，终端设备的直接通信能够更高效率的利用频谱资源，提高蜂窝网容量，减少基站控制信令的开销，是一项能给蜂窝网通信带来巨大利益的技术。Direct communication between terminals (referred to as D2D communication, Device to Device, device to device) can enable direct communication between terminal devices without any intermediate infrastructure. Therefore, the direct communication of terminal equipment can use spectrum resources more efficiently, increase the capacity of cellular network, and reduce the overhead of base station control signaling, which is a technology that can bring huge benefits to cellular network communication.

D2D通信可以使用的频谱资源有两种，一种是使用非授权频段，一种是与蜂窝通信共用频谱。由于非授权频段非常拥挤，D2D与蜂窝通信共用频谱资源成为D2D通信的主要模式。但如何合理的使用蜂窝频谱，避免D2D通信与蜂窝通信、以及D2D通信之间的干扰是一个亟需解决关键问题。目前，主要有两种干扰控制方法：集中式和分布式。分布式干扰控制方式的主要的思想是终端设备自行感知周围环境中的频谱利用情况，以控制发射功率和接收功率，尽量不去干扰其它的设备也不被其它的设备所干扰。集中式干扰控制方式的主要的思想是基站根据当前的频谱分配情况以及每个终端设备的发射功率、位置等信息，来分配每个终端设备的通信频谱，以避免设备间的干扰。There are two types of spectrum resources that can be used by D2D communication, one is to use unlicensed frequency bands, and the other is to share spectrum with cellular communication. Since the unlicensed frequency band is very crowded, the sharing of spectrum resources between D2D and cellular communication has become the main mode of D2D communication. However, how to reasonably use the cellular spectrum and avoid interference between D2D communication and cellular communication, and D2D communication is a key problem that needs to be solved urgently. Currently, there are mainly two interference control methods: centralized and distributed. The main idea of the distributed interference control method is that the terminal equipment perceives the spectrum utilization in the surrounding environment by itself, so as to control the transmission power and reception power, and try not to interfere with or be interfered by other equipment. The main idea of the centralized interference control method is that the base station allocates the communication spectrum of each terminal device according to the current spectrum allocation situation and information such as the transmit power and location of each terminal device, so as to avoid interference between devices.

分别位于两个小区边缘的两个UE（User Equipment，用户设备）距离很近时，两个UE间的信道状态很好，这时两个UE进行D2D通信能够获得非常好的通信质量；相反的，由于两个UE距离各自的服务基站都很远，两个UE与各自的服务基站之间的信道质量很差，信号衰落很大，此时，如果进行蜂窝通信就不是一个很好的选择了。但是，由于邻区间的D2D通信频率不同或帧定时结构不同，无法实现小区间D2D通信。When the distance between two UEs (User Equipment, user equipment) located at the edge of two cells is very close, the channel state between the two UEs is very good, and at this time the two UEs can obtain very good communication quality through D2D communication; on the contrary , because the two UEs are far away from their respective serving base stations, the channel quality between the two UEs and their respective serving base stations is very poor, and the signal fading is very large. At this time, it is not a good choice for cellular communication . However, due to the difference in D2D communication frequency or frame timing structure between adjacent areas, inter-cell D2D communication cannot be realized.

发明内容Contents of the invention

本发明实施例提供了一种小区间D2D通信的方法、用户设备和基站，能够实现小区间D2D通信。Embodiments of the present invention provide a method for inter-cell D2D communication, user equipment and a base station, capable of implementing inter-cell D2D communication.

第一方面，提供了一种小区间D2D通信的方法，包括：第一小区内的第一UE获取第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区标识ID；该第一UE在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时；该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；该第一UE在该第二小区的D2D通信频率上以该发送定时发送消息，在该第一小区的D2D通信频率上接收该第二UE发送的消息。In a first aspect, a method for inter-cell D2D communication is provided, including: a first UE in a first cell obtains second cell information, and the second cell information includes: a D2D communication frequency and a cell ID of the second cell; The first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell; The downlink timing of the cell determines the sending timing of sending messages to the second UE in the second cell; Receive the message sent by the second UE on the communication frequency.

在第一种可能的实现方式中，第一小区内的第一UE获取第二小区信息，具体实现为：该第一UE接收该第一小区的基站发送的该第二小区信息。In a first possible implementation manner, the first UE in the first cell acquires the second cell information, which is specifically implemented as: the first UE receives the second cell information sent by the base station of the first cell.

在第二种可能的实现方式中，第一小区内的第一UE获取第二小区信息，具体实现为：该第一UE接收第三UE发送的该第二小区信息，该第三UE位于该第一小区和该第二小区共同覆盖区域内。In a second possible implementation manner, the first UE in the first cell obtains the information of the second cell, which is specifically implemented as follows: the first UE receives the information of the second cell sent by a third UE, and the third UE is located in the The first cell and the second cell are in a common coverage area.

在第三种可能的实现方式中，结合第一方面或第一方面的第一种或第二种可能的实现方式，该第一UE在该第二小区的D2D通信频率上以该发送定时发送消息，在该第一小区的D2D通信频率上接收该第二UE发送的消息，具体实现为：该第一UE在该第二小区的D2D通信频率上以该发送定时发送该第一UE的设备发现信号以便于该第二UE发现该第一UE，在该第一小区的D2D通信频率上接收该第二UE发送的该第二UE的设备发现信号，发现该第二UE；该第一UE在该第二小区的D2D通信频率上以该发送定时向该第二UE发送寻呼请求消息，在该第一小区的D2D通信频率上接收该第二UE发送的寻呼响应消息；该第一UE在该第二小区的D2D通信频率上以该发送定时向该第二UE发送数据，在该第一小区的D2D通信频率上接收该第二UE发送的数据。In a third possible implementation manner, in combination with the first aspect or the first or second possible implementation manner of the first aspect, the first UE transmits at the sending timing on the D2D communication frequency of the second cell message, receiving the message sent by the second UE on the D2D communication frequency of the first cell, specifically implemented as: the first UE sends the device of the first UE at the sending timing on the D2D communication frequency of the second cell The discovery signal is used to facilitate the second UE to discover the first UE, receive the device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell, and discover the second UE; the first UE Send a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell, and receive a paging response message sent by the second UE on the D2D communication frequency of the first cell; the first The UE sends data to the second UE at the sending timing on the D2D communication frequency of the second cell, and receives the data sent by the second UE on the D2D communication frequency of the first cell.

在第四种可能的实现方式中，结合第一方面或第一方面的第一种或第二种或第三种可能的实现方式，该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时，具体实现为：该第一UE将该第二小区的下行定时确定为该发送定时。In a fourth possible implementation manner, in combination with the first aspect or the first, second, or third possible implementation manner of the first aspect, the first UE determines to send The sending timing of the message sent by the second UE in the second cell is specifically implemented as: the first UE determines the downlink timing of the second cell as the sending timing.

在第五种可能的实现方式中，结合第一方面或第一方面的第一种或第二种或第三种可能的实现方式，该第二小区信息还包括：该第二小区与该第一小区的定时差ΔT或者该第二小区的基站定时T′_B；该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时，具体实现为：该第一UE根据等式T=2(T_B+ΔT)-T′₂，或者T=2T′_B-T′₂，确定该发送定时T，其中，T_B为该第一小区的基站定时，T′₂为该第二小区的下行定时。In a fifth possible implementation manner, in combination with the first aspect or the first, second, or third possible implementation manner of the first aspect, the second cell information further includes: the second cell and the first The timing difference ΔT of a cell or the base station timing T′_B of the second cell; the first UE determines the timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell, and the specific implementation is: the first UE determines the transmission timing T according to the equation T=2(T_B+ ΔT)-T′₂ , or T=2T′_B −T′₂ , where TB is the first cell’s Base station timing, T'2 is the downlink timing of the_second cell.

在第六种可能的实现方式中，结合第一方面的第二种或第三种或第四种或第五种可能的实现方式，在该第一UE接收第三UE发送的该第二小区信息之前，该方法还包括：该第一UE通过设备发现，发现该第三UE；该第一UE向该第三UE发送寻呼请求消息请求该第二小区信息；该第一UE接收第三UE发送的该第二小区信息，具体实现为：该第一UE接收该第三UE通过寻呼响应消息发送的该第二小区信息。In a sixth possible implementation manner, in combination with the second or third or fourth or fifth possible implementation manner of the first aspect, the first UE receives the second cell information sent by the third UE Before information, the method further includes: the first UE discovers the third UE through device discovery; the first UE sends a paging request message to the third UE to request the second cell information; the first UE receives the third UE The second cell information sent by the UE is specifically implemented as: the first UE receives the second cell information sent by the third UE through a paging response message.

第二方面，提供了一种小区间D2D通信的方法，包括：第一小区的基站获取第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID；该基站向该第一小区内的第一UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。In a second aspect, a method for inter-cell D2D communication is provided, including: a base station of a first cell obtains information of a second cell, and the information of the second cell includes: a D2D communication frequency and a cell ID of the second cell; The first UE in the first cell sends the second cell information, so that the first UE sends a message to the second UE in the second cell on the D2D communication frequency of the second cell.

在第一种可能的实现方式中，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。In a first possible implementation manner, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

第三方面，提供了一种小区间D2D通信的方法，包括：位于第一小区和第二小区共同覆盖区域内的第三UE获取第二小区信息，该第二小区信息包括：该第二小区的D2D通信频率和小区ID；该第三UE向该第一小区内的第一UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。In a third aspect, a method for inter-cell D2D communication is provided, including: a third UE located in the common coverage area of the first cell and the second cell obtains information about the second cell, and the information about the second cell includes: the second cell the D2D communication frequency and cell ID of the second cell; the third UE sends the second cell information to the first UE in the first cell, so that the first UE can communicate with the second cell on the D2D communication frequency of the second cell The second UE within sends the message.

在第一种可能的实现方式中，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。In a first possible implementation manner, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

在第二种可能的实现方式中，结合第三方面或第三方面的第一种可能的实现方式，在该第三UE向该第一小区内的第一UE发送该第二小区信息之前，该方法还包括：该第三UE接收该第一UE发送的请求该第二小区信息的寻呼请求消息；该第三UE向该第一小区内的第一UE发送该第二小区信息，具体实现为：该第三UE向该第一UE通过寻呼响应消息发送该第二小区信息。In a second possible implementation manner, in combination with the third aspect or the first possible implementation manner of the third aspect, before the third UE sends the second cell information to the first UE in the first cell, The method further includes: the third UE receiving a paging request message sent by the first UE requesting the second cell information; the third UE sending the second cell information to the first UE in the first cell, specifically The implementation is: the third UE sends the second cell information to the first UE through a paging response message.

第四方面，提供了一种用户设备UE，该UE包括：接收模块，用于获取该UE所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID；搜索模块，用于在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时；确定模块，用于根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；发送模块，用于在该第二小区的D2D通信频率上以该发送定时发送消息；该接收模块还用于在该第一小区的D2D通信频率上接收该第二UE发送的消息。In a fourth aspect, a user equipment UE is provided, the UE includes: a receiving module, configured to acquire information of a second cell other than the first cell where the UE is located, and the information of the second cell includes: D2D communication of the second cell Frequency and cell ID; a search module, configured to search for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell; a determination module , configured to determine the sending timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell; the sending module is configured to send the message at the sending timing on the D2D communication frequency of the second cell ; The receiving module is also used to receive the message sent by the second UE on the D2D communication frequency of the first cell.

在第一种可能的实现方式中，该接收模块具体用于接收该第一小区的基站发送的该第二小区信息。In a first possible implementation manner, the receiving module is specifically configured to receive the second cell information sent by the base station of the first cell.

在第二种可能的实现方式中，该接收模块具体用于接收第三UE发送的该第二小区信息，该第三UE位于该第一小区和该第二小区共同覆盖区域内。In a second possible implementation manner, the receiving module is specifically configured to receive information about the second cell sent by a third UE, where the third UE is located in a common coverage area of the first cell and the second cell.

在第三种可能的实现方式中，结合第四方面或第四方面的第一种或第二种可能的实现方式，该发送模块具体用于在该第二小区的D2D通信频率上以该发送定时发送该第一UE的设备发现信号以便于该第二UE发现该第一UE；在该第二小区的D2D通信频率上以该发送定时向该第二UE发送寻呼请求消息；在该第二小区的D2D通信频率上以该发送定时向该第二UE发送数据；该接收模块具体用于在该第一小区的D2D通信频率上接收该第二UE发送的该第二UE的设备发现信号，发现该第二UE；在该第一小区的D2D通信频率上接收该第二UE发送的寻呼响应消息；在该第一小区的D2D通信频率上接收该第二UE发送的数据。In a third possible implementation manner, in combination with the fourth aspect or the first or second possible implementation manner of the fourth aspect, the sending module is specifically configured to use the sending Sending the device discovery signal of the first UE regularly so that the second UE discovers the first UE; sending a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell; Send data to the second UE at the sending timing on the D2D communication frequency of the second cell; the receiving module is specifically configured to receive the device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell , discovering the second UE; receiving a paging response message sent by the second UE on the D2D communication frequency of the first cell; receiving data sent by the second UE on the D2D communication frequency of the first cell.

在第四种可能的实现方式中，结合第四方面或第四方面的第一种或第二种或第三种可能的实现方式，该确定模块具体用于将该第二小区的下行定时确定为该发送定时。In a fourth possible implementation manner, in combination with the fourth aspect or the first, second, or third possible implementation manner of the fourth aspect, the determining module is specifically configured to determine the downlink timing of the second cell Time the send.

在第五种可能的实现方式中，结合第四方面或第四方面的第一种或第二种或第三种可能的实现方式，该第二小区信息还包括：该第二小区与该第一小区的定时差ΔT或者该第二小区的基站定时T′_B；该确定模块具体用于根据等式T=2(T_B+ΔT)-T′₂，或者T=2T′_B-T′₂，确定该发送定时T，其中，T_B为该第一小区的基站定时，T′₂为该第二小区的下行定时。In a fifth possible implementation manner, in combination with the fourth aspect or the first, second, or third possible implementation manner of the fourth aspect, the second cell information further includes: the second cell and the first The timing difference ΔT of a cell or the timing T′_B of the base station of the second cell; the determination module is specifically used according to the equation T=2(T_B +ΔT)-T′₂ , or T=2T′_B −T′_2. Determine the transmission timing T, where TB is the timing of the base station of the first cell, and_T'2 is the downlink timing of the_second cell.

在第六种可能的实现方式中，结合第一方面的第二种或第三种或第四种或第五种可能的实现方式，该接收模块还用于通过设备发现，发现该第三UE；该发送模块还用于向该第三UE发送寻呼请求消息请求该第二小区信息；该接收模块还用于接收该第三UE通过寻呼响应消息发送的该第二小区信息。In a sixth possible implementation manner, in combination with the second or third or fourth or fifth possible implementation manner of the first aspect, the receiving module is further configured to discover the third UE through device discovery The sending module is also used to send a paging request message to the third UE to request the second cell information; the receiving module is also used to receive the second cell information sent by the third UE through a paging response message.

第五方面，提供了一种基站，该基站包括：获取模块，用于获取该基站所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID；发送模块，用于向该第一小区内的第一UE发送该获取模块获取的该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。In a fifth aspect, a base station is provided, and the base station includes: an acquisition module configured to acquire information about a second cell other than the first cell where the base station is located, where the information about the second cell includes: the D2D communication frequency of the second cell and A cell ID; a sending module, configured to send the second cell information obtained by the obtaining module to the first UE in the first cell, so that the first UE sends the second cell information to the second cell on the D2D communication frequency of the second cell. A second UE within the cell sends the message.

在第一种可能的实现方式中，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。In a first possible implementation manner, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

第六方面，提供了一种用户设备UE，该UE包括：获取模块，用于当该UE位于第一小区和第二小区共同覆盖区域内时，获取第二小区信息，该第二小区信息包括：该第二小区的D2D通信频率和小区ID；发送模块，用于向该第一小区内的第一UE发送该获取模块获取的该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。In a sixth aspect, there is provided a user equipment UE, the UE includes: an acquisition module, configured to acquire second cell information when the UE is located in a common coverage area of the first cell and the second cell, the second cell information includes : D2D communication frequency and cell ID of the second cell; a sending module, configured to send the second cell information acquired by the acquiring module to the first UE in the first cell, so that the first UE can be in the second cell The message is sent to the second UE in the second cell on the D2D communication frequency of the cell.

在第一种可能的实现方式中，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。In a first possible implementation manner, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

在第二种可能的实现方式中，结合第六方面或第六方面的第一种可能的实现方式，该UE还包括：接收模块，用于接收该第一UE发送的请求该第二小区信息的寻呼请求消息；该发送模块还用于向该第一UE通过寻呼响应消息发送该第二小区信息。In a second possible implementation manner, with reference to the sixth aspect or the first possible implementation manner of the sixth aspect, the UE further includes: a receiving module, configured to receive a request for the second cell information sent by the first UE the paging request message; the sending module is also used to send the second cell information to the first UE through a paging response message.

基于上述技术方案，本发明实施例的小区间D2D通信的方法、UE和基站，通过第一小区内的第一UE获取第二小区的D2D通信频率和小区ID，在第二小区的D2D通信频率上向第二小区内的第二UE发送消息，能够实现小区间D2D通信。Based on the above technical solution, the inter-cell D2D communication method, UE and base station in the embodiment of the present invention obtain the D2D communication frequency and cell ID of the second cell through the first UE in the first cell, and the D2D communication frequency of the second cell By sending a message to the second UE in the second cell, inter-cell D2D communication can be realized.

附图说明Description of drawings

为了更清楚地说明本发明实施例的技术方案，下面将对本发明实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required in the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

图1是根据本发明实施例的小区间D2D通信的方法的示意性流程图。Fig. 1 is a schematic flowchart of a method for inter-cell D2D communication according to an embodiment of the present invention.

图2是根据本发明实施例的应用场景的示意图。Fig. 2 is a schematic diagram of an application scenario according to an embodiment of the present invention.

图3是根据本发明实施例的获取第二小区信息的方法的示意性流程图。Fig. 3 is a schematic flowchart of a method for acquiring second cell information according to an embodiment of the present invention.

图4是根据本发明实施例的小区间D2D通信的方法的另一示意性流程图。Fig. 4 is another schematic flowchart of a method for inter-cell D2D communication according to an embodiment of the present invention.

图5是根据本发明另一实施例的小区间D2D通信的方法的示意性流程图。Fig. 5 is a schematic flowchart of a method for inter-cell D2D communication according to another embodiment of the present invention.

图6是根据本发明又一实施例的小区间D2D通信的方法的示意性流程图。Fig. 6 is a schematic flowchart of a method for inter-cell D2D communication according to yet another embodiment of the present invention.

图7是根据本发明实施例的小区间D2D通信的方法的过程的示意性流程图。Fig. 7 is a schematic flow chart of the process of the method for inter-cell D2D communication according to an embodiment of the present invention.

图8是根据本发明另一实施例的应用场景的示意图。Fig. 8 is a schematic diagram of an application scenario according to another embodiment of the present invention.

图9是根据本发明另一实施例的小区间D2D通信的方法的过程的示意性流程图。Fig. 9 is a schematic flow chart of a process of a method for inter-cell D2D communication according to another embodiment of the present invention.

图10是根据本发明实施例的UE的示意性框图。Fig. 10 is a schematic block diagram of a UE according to an embodiment of the present invention.

图11是根据本发明实施例的基站的示意性框图。Fig. 11 is a schematic block diagram of a base station according to an embodiment of the present invention.

图12是根据本发明另一实施例的UE的示意性框图。Fig. 12 is a schematic block diagram of a UE according to another embodiment of the present invention.

图13是根据本发明又一实施例的UE的示意性框图。Fig. 13 is a schematic block diagram of a UE according to yet another embodiment of the present invention.

图14是根据本发明另一实施例的基站的示意性框图。Fig. 14 is a schematic block diagram of a base station according to another embodiment of the present invention.

图15是根据本发明又一实施例的UE的示意性框图。Fig. 15 is a schematic block diagram of a UE according to yet another embodiment of the present invention.

具体实施方式detailed description

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

应理解，本发明实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯（Global System of Mobile communication，简称为“GSM”）系统、码分多址（CodeDivision Multiple Access，简称为“CDMA”）系统、宽带码分多址（Wideband CodeDivision Multiple Access，简称为“WCDMA”）系统、通用分组无线业务（General PacketRadio Service，简称为“GPRS”）、长期演进（Long Term Evolution，简称为“LTE”）系统、LTE频分双工（Frequency Division Duplex，简称为“FDD”）系统、LTE时分双工（Time DivisionDuplex，简称为“TDD”）、通用移动通信系统（Universal Mobile TelecommunicationSystem，简称为“UMTS”）、全球互联微波接入（Worldwide Interoperability forMicrowave Access，简称为“WiMAX”）通信系统等。It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: Global System of Mobile communication (Global System of Mobile communication, referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "GSM") system, CDMA") system, Wideband Code Division Multiple Access (referred to as "WCDMA") system, General Packet Radio Service (referred to as "GPRS"), Long Term Evolution (referred to as " LTE") system, LTE Frequency Division Duplex (Frequency Division Duplex, referred to as "FDD") system, LTE Time Division Duplex (Time Division Duplex, referred to as "TDD"), Universal Mobile Telecommunication System (Universal Mobile Telecommunication System, referred to as " UMTS"), Worldwide Interoperability for Microwave Access (WiMAX for short) communication system, etc.

还应理解，在本发明实施例中，用户设备（User Equipment，简称为“UE”）可称之为终端（Terminal）、移动台（Mobile Station，简称为“MS”）、移动终端（Mobile Terminal）等，该用户设备可以经无线接入网（Radio Access Network，简称为“RAN”）与一个或多个核心网进行通信，例如，用户设备可以是移动电话（或称为“蜂窝”电话）、具有移动终端的计算机等，例如，用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音和/或数据。It should also be understood that in this embodiment of the present invention, a user equipment (User Equipment, referred to as "UE") may be referred to as a terminal (Terminal), a mobile station (Mobile Station, referred to as "MS"), a mobile terminal (Mobile Terminal ), etc., the user equipment can communicate with one or more core networks via the radio access network (Radio Access Network, referred to as "RAN"), for example, the user equipment can be a mobile phone (or called a "cellular" phone) , a computer with a mobile terminal, etc., for example, the user equipment can also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges voice and/or data with the wireless access network.

在本发明实施例中，基站可以是GSM或CDMA中的基站（Base TransceiverStation，简称为“BTS”），也可以是WCDMA中的基站（NodeB，简称为“NB”），还可以是LTE中的演进型基站（Evolutional Node B，简称为“ENB或e-NodeB”），本发明并不限定。但为描述方便，下述实施例将以基站ENB和用户设备UE为例进行说明。In the embodiment of the present invention, the base station may be a base station (Base TransceiverStation, "BTS" for short) in GSM or CDMA, or a base station (NodeB, "NB" for short) in WCDMA, or a base station in LTE. An evolved base station (Evolutional Node B, referred to as "ENB or e-NodeB") is not limited in the present invention. However, for the convenience of description, the following embodiments will be described by taking the base station ENB and the user equipment UE as examples.

图1示出了根据本发明实施例的小区间D2D通信的方法100的示意性流程图。如图1所示，该方法100包括：Fig. 1 shows a schematic flowchart of a method 100 for inter-cell D2D communication according to an embodiment of the present invention. As shown in Figure 1, the method 100 includes:

S110，第一小区内的第一UE获取第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID；S110. The first UE in the first cell acquires information about the second cell, where the information about the second cell includes: a D2D communication frequency and a cell ID of the second cell;

S120，该第一UE在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时；S120, the first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell;

S130，该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；S130. The first UE determines, according to the downlink timing of the second cell, the sending timing of sending a message to the second UE in the second cell;

S140，该第一UE在该第二小区的D2D通信频率上以该发送定时发送消息，在该第一小区的D2D通信频率上接收该第二UE发送的消息。S140, the first UE sends a message at the sending timing on the D2D communication frequency of the second cell, and receives the message sent by the second UE on the D2D communication frequency of the first cell.

分别位于两个小区边缘的两个UE距离很近时，这两个UE进行D2D通信能够获得非常好的通信质量。例如，图2所示场景中的UE1和UE2，它们之间进行D2D通信比通过各自基站进行蜂窝通信会是一个更好的选择。在本发明实施例中，为了能够实现D2D通信，第一小区内的第一UE首先获取第二小区的D2D通信频率和小区ID，然后在第二小区的D2D通信频率上根据第二小区的小区ID搜索第二小区的下行同步信号，获取第二小区的下行定时，再根据第二小区的下行定时，确定向第二小区内的第二UE发送消息的发送定时，最后，在第二小区的D2D通信频率上以该发送定时发送消息，并在第一小区的D2D通信频率上接收第二UE发送的消息，实现与第二UE之间的设备发现、寻呼和通信。When two UEs respectively located at the edges of two cells are very close to each other, the two UEs can obtain very good communication quality during D2D communication. For example, for UE1 and UE2 in the scenario shown in FIG. 2 , it is a better choice to perform D2D communication between them than to perform cellular communication through respective base stations. In the embodiment of the present invention, in order to realize D2D communication, the first UE in the first cell first obtains the D2D communication frequency and cell ID of the second cell, and then uses the cell ID of the second cell on the D2D communication frequency of the second cell The ID searches for the downlink synchronization signal of the second cell, obtains the downlink timing of the second cell, and then determines the timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell, and finally, in the second cell The message is sent on the D2D communication frequency at the sending timing, and the message sent by the second UE is received on the D2D communication frequency of the first cell, so as to realize device discovery, paging and communication with the second UE.

因此，本发明实施例的小区间D2D通信的方法，通过获取第二小区的D2D通信频率和小区ID，在第二小区的D2D通信频率上向第二小区内的第二UE发送消息，能够实现小区间D2D通信。Therefore, the method for inter-cell D2D communication in the embodiment of the present invention can achieve Inter-cell D2D communication.

应理解，在第一UE与第二UE进行D2D通信的过程中，第一UE与第二UE的各种操作相同或相应，因此，第二UE的各种操作可以参见第一UE，为了简洁，本发明实施例对第二UE的各种操作不再详细描述。It should be understood that during the D2D communication process between the first UE and the second UE, various operations of the first UE and the second UE are the same or corresponding, therefore, various operations of the second UE can refer to the first UE, for the sake of brevity In this embodiment of the present invention, various operations of the second UE are not described in detail.

在本发明实施例中，第一UE获取的第二小区信息表示第一UE与第二UE进行D2D通信时所需要的第二小区的相关信息，除了第二小区的D2D通信频率和小区ID外，根据小区间的差别，第二小区信息还可以包括定时信息或D2D帧结构等。In the embodiment of the present invention, the second cell information obtained by the first UE indicates the relevant information of the second cell required when the first UE performs D2D communication with the second UE, except for the D2D communication frequency and cell ID of the second cell , according to differences between cells, the second cell information may also include timing information or a D2D frame structure and the like.

在S110中，第一小区内的第一UE获取第二小区信息，该第二小区信息包括：第二小区的D2D通信频率和小区ID。In S110, the first UE in the first cell acquires information about the second cell, where the information about the second cell includes: a D2D communication frequency and a cell ID of the second cell.

由于第一小区和第二小区的D2D通信配置不同，第一UE和第二UE无法直接进行D2D通信，因此，第一UE和第二UE要首先获取对方小区的信息，包括对方小区的D2D通信频率和小区ID。获取方式可以为通过各自基站获取，或者通过位于第一小区和第二小区共同覆盖区域内的第三UE获取。因此，如图3所示，可选地，S110包括：Since the D2D communication configurations of the first cell and the second cell are different, the first UE and the second UE cannot directly perform D2D communication. Therefore, the first UE and the second UE must first obtain the information of the opposing cell, including the D2D communication of the opposing cell. frequency and cell ID. The acquisition manner may be acquisition through respective base stations, or acquisition through a third UE located in the common coverage area of the first cell and the second cell. Therefore, as shown in FIG. 3, optionally, S110 includes:

S111，该第一UE接收该第一小区的基站发送的该第二小区信息。S111. The first UE receives the second cell information sent by the base station of the first cell.

第一UE从所在的第一小区的基站接收第二小区信息。例如，第一UE通过第一小区的基站发送的系统广播消息获取第二小区的D2D通信频率和小区ID。同样地，第二UE通过第二小区的基站发送的系统广播消息获取第一小区的D2D通信频率和小区ID。The first UE receives information about the second cell from the base station of the first cell where it is located. For example, the first UE acquires the D2D communication frequency and cell ID of the second cell through a system broadcast message sent by the base station of the first cell. Likewise, the second UE acquires the D2D communication frequency and cell ID of the first cell through a system broadcast message sent by the base station of the second cell.

如图3所示，可选地，S110包括：As shown in Figure 3, optionally, S110 includes:

S112，该第一UE接收第三UE发送的该第二小区信息，该第三UE位于该第一小区和该第二小区共同覆盖区域内。S112. The first UE receives the second cell information sent by a third UE, where the third UE is located in a common coverage area of the first cell and the second cell.

第一UE从第三UE接收第二小区信息。可选地，在S112之前，该方法100还包括：The first UE receives second cell information from the third UE. Optionally, before S112, the method 100 also includes:

该第一UE通过设备发现，发现该第三UE；The first UE discovers the third UE through device discovery;

该第一UE向该第三UE发送寻呼请求消息请求该第二小区信息；the first UE sends a paging request message to the third UE to request information about the second cell;

S112包括：S112 includes:

该第一UE接收该第三UE通过寻呼响应消息发送的该第二小区信息。The first UE receives the second cell information sent by the third UE through a paging response message.

例如，第一UE通过设备发现，知道第三UE同时在第一小区和第二小区做D2D通信，然后第一UE通过寻呼请求消息向第三UE请求第二小区信息，包括第二小区的D2D通信频率和小区ID。第三UE收到第一UE的寻呼请求消息后，向第一UE发送寻呼响应消息，携带第二小区信息，包括第二小区的D2D通信频率和小区ID。同样地，第二UE也通过与第三UE的寻呼消息获取第一小区的D2D通信频率和小区ID。For example, through device discovery, the first UE knows that the third UE is performing D2D communication in the first cell and the second cell at the same time, and then the first UE requests the information of the second cell from the third UE through a paging request message, including the information of the second cell. D2D communication frequency and cell ID. After receiving the paging request message from the first UE, the third UE sends a paging response message to the first UE, carrying the information of the second cell, including the D2D communication frequency and cell ID of the second cell. Similarly, the second UE also acquires the D2D communication frequency and cell ID of the first cell through a paging message with the third UE.

在S120中，该第一UE在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，获取该第二小区的下行定时。In S120, the first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, and acquires the downlink timing of the second cell.

在获取了第二小区的D2D通信频率和小区ID后，第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获得第二小区的下行定时。After acquiring the D2D communication frequency and the cell ID of the second cell, the first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell, and obtains the downlink timing of the second cell.

在S130中，该第一UE根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时。In S130, the first UE determines the sending timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell.

在获取了第二小区的下行定时后，第一UE再根据第二小区的下行定时，确定向第二小区内的第二UE发送消息的发送定时。After acquiring the downlink timing of the second cell, the first UE then determines the timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell.

可选地，S130包括：Optionally, S130 includes:

该第一UE将该第二小区的下行定时确定为该发送定时。The first UE determines the downlink timing of the second cell as the sending timing.

也就是说，第一UE将第二小区的下行定时确定为向第二小区内的第二UE发送消息的发送定时。That is to say, the first UE determines the downlink timing of the second cell as the sending timing of sending a message to the second UE in the second cell.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差ΔT或者该第二小区的基站定时T′_B；Optionally, the second cell information further includes: a timing difference ΔT between the second cell and the first cell or a base station timing T′_B of the second cell;

S130包括：S130 includes:

该第一UE根据等式T=2(T_B+ΔT)-T′₂，或者T=2T′_B-T′₂，确定该发送定时T，The first UE determines the sending timing T according to the equation T=2(T_B +ΔT)-T'₂ , or T=2T'_B -T'₂ ,

其中，T_B为该第一小区的基站定时，T′₂为该第二小区的下行定时。Wherein, TB is the base station timing of the first cell, and_T'2 is the downlink timing of the_second cell.

具体而言，第一UE获取的第二小区信息包括第二小区的D2D通信频率、小区ID和第二小区与第一小区的定时差ΔT；第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获得第二小区的下行定时T′₂；根据T=2(T_B+ΔT)-T′₂计算向第二小区内的第二UE发送消息的发送定时T。Specifically, the second cell information acquired by the first UE includes the D2D communication frequency of the second cell, the cell ID, and the timing difference ΔT between the second cell and the first cell; Obtain the downlink timing T'₂ of the second cell from the downlink synchronization signal of the second cell; calculate the sending timing T of sending a message to the second UE in the second cell according to T=2(T_B +ΔT)-T'₂ .

或者，第一UE获取的第二小区信息包括第二小区的D2D通信频率、小区ID和第二小区的基站定时T′_B；第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获得第二小区的下行定时T′₂；根据T=2T′_B-T′₂计算向第二小区内的第二UE发送消息的发送定时T。Alternatively, the second cell information acquired by the first UE includes the D2D communication frequency of the second cell, the cell ID, and the base station timing T′_B of the second cell; Obtain the downlink timing T'₂ of the second cell for the downlink synchronization signal; calculate the sending timing T for sending the message to the second UE in the second cell according to T=2T'_B -T'₂ .

在S140中，该第一UE在该第二小区的D2D通信频率上以该发送定时发送消息，在该第一小区的D2D通信频率上接收该第二UE发送的消息。In S140, the first UE sends a message at the sending timing on the D2D communication frequency of the second cell, and receives the message sent by the second UE on the D2D communication frequency of the first cell.

在得到了第二小区的D2D通信频率和向第二小区内的第二UE发送消息的发送定时后，第一UE在第二小区的D2D通信频率上以该发送定时发送消息，并在第一小区的D2D通信频率上接收第二UE发送的消息，实现与第二UE之间的设备发现、寻呼和通信。After obtaining the D2D communication frequency of the second cell and the sending timing of sending a message to the second UE in the second cell, the first UE sends a message at the sending timing on the D2D communication frequency of the second cell, and at the first The message sent by the second UE is received on the D2D communication frequency of the cell to realize device discovery, paging and communication with the second UE.

如图4所示，可选地，S140包括：As shown in Figure 4, optionally, S140 includes:

S141，该第一UE在该第二小区的D2D通信频率上以该发送定时发送该第一UE的设备发现信号以便于该第二UE发现该第一UE，在该第一小区的D2D通信频率上接收该第二UE发送的该第二UE的设备发现信号，发现该第二UE；S141, the first UE sends the device discovery signal of the first UE on the D2D communication frequency of the second cell at the sending timing so that the second UE can discover the first UE, and on the D2D communication frequency of the first cell receiving the device discovery signal of the second UE sent by the second UE, and discovering the second UE;

S142，该第一UE在该第二小区的D2D通信频率上以该发送定时向该第二UE发送寻呼请求消息，在该第一小区的D2D通信频率上接收该第二UE发送的寻呼响应消息；S142. The first UE sends a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell, and receives the paging message sent by the second UE on the D2D communication frequency of the first cell. response message;

S143，该第一UE在该第二小区的D2D通信频率上以该发送定时向该第二UE发送数据，在该第一小区的D2D通信频率上接收该第二UE发送的数据。S143. The first UE sends data to the second UE at the sending timing on the D2D communication frequency of the second cell, and receives the data sent by the second UE on the D2D communication frequency of the first cell.

具体而言，为了使第二小区内的第二UE能够发现自己，第一UE在第二小区的D2D通信频率上以确定好的发送定时发送第一UE的设备发现信号。第二UE在第二小区的D2D通信频率上接收设备发现信号，因此，第二UE能够发现第一UE。类似地，第一UE在第一小区的D2D通信频率上也能接收到第二UE在第一小区的D2D通信频率上以确定好的发送定时发送的第二UE的设备发现信号，从而发现第二UE。Specifically, in order to enable the second UE in the second cell to discover itself, the first UE sends the device discovery signal of the first UE at a determined sending timing on the D2D communication frequency of the second cell. The second UE receives the device discovery signal on the D2D communication frequency of the second cell, so the second UE can discover the first UE. Similarly, on the D2D communication frequency of the first cell, the first UE can also receive the device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell at a determined transmission timing, so as to discover the second UE's device discovery signal. Two UE.

第一UE与第二UE相互发现后，在第一UE想与第二UE通信时，第一UE就在第二小区的D2D通信频率上以确定好的发送定时向第二UE发送寻呼请求消息。第二UE在第二小区的D2D通信频率上接收该寻呼请求消息，然后在第一小区的D2D通信频率上向第一UE发送寻呼响应消息。After the first UE and the second UE discover each other, when the first UE wants to communicate with the second UE, the first UE sends a paging request to the second UE at the determined sending timing on the D2D communication frequency of the second cell information. The second UE receives the paging request message on the D2D communication frequency of the second cell, and then sends the paging response message to the first UE on the D2D communication frequency of the first cell.

第一UE和第二UE完成寻呼后，建立通信链路开始数据通信。数据通信的频率为接收方的D2D通信频率。即第一UE在第二小区的D2D通信频率上向第二UE发送数据，在第一小区的D2D通信频率上接收第二UE发送的数据。After the paging is completed, the first UE and the second UE establish a communication link and start data communication. The data communication frequency is the D2D communication frequency of the receiver. That is, the first UE sends data to the second UE on the D2D communication frequency of the second cell, and receives the data sent by the second UE on the D2D communication frequency of the first cell.

这样，本发明实施例的小区间D2D通信的方法，通过第一小区内的第一UE在第二小区的D2D通信频率上向第二小区内的第二UE发送消息，在第一小区的D2D通信频率上接收第二UE发送的消息，能够实现小区间D2D通信。In this way, in the method for inter-cell D2D communication in the embodiment of the present invention, the first UE in the first cell sends a message to the second UE in the second cell on the D2D communication frequency of the second cell, and the D2D communication in the first cell By receiving the message sent by the second UE on the communication frequency, D2D communication between cells can be realized.

上文中结合图1至图4，从第一UE的角度详细描述了小区间D2D通信的方法，下面将结合图5和图6，从基站和第三UE的角度描述小区间D2D通信的方法。The inter-cell D2D communication method is described in detail from the perspective of the first UE with reference to FIG. 1 to FIG. 4 above, and the inter-cell D2D communication method will be described below from the perspective of the base station and the third UE in conjunction with FIG. 5 and FIG. 6 .

图5示出了根据本发明实施例的小区间D2D通信的方法200的示意性流程图。如图5所示，该方法200包括：Fig. 5 shows a schematic flowchart of a method 200 for inter-cell D2D communication according to an embodiment of the present invention. As shown in Figure 5, the method 200 includes:

S210，第一小区的基站获取第二小区信息，该第二小区信息包括：第二小区的设备到设备D2D通信频率和小区ID；S210. The base station of the first cell acquires information of the second cell, where the information of the second cell includes: a device-to-device D2D communication frequency and a cell ID of the second cell;

S220，该基站向该第一小区内的第一用户设备UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。S220, the base station sends the second cell information to the first user equipment UE in the first cell, so that the first UE sends information to the second UE in the second cell on the D2D communication frequency of the second cell information.

为了实现第一小区与第二小区间的D2D通信，第一小区的基站向第一小区内的第一UE发送第二小区的D2D通信频率和小区ID，这样，第一UE能够实现在第二小区的D2D通信频率上向第二UE发送消息，从而实现与第二UE之间的设备发现、寻呼和通信。In order to realize the D2D communication between the first cell and the second cell, the base station of the first cell sends the D2D communication frequency and cell ID of the second cell to the first UE in the first cell, so that the first UE can realize the D2D communication in the second cell. A message is sent to the second UE on the D2D communication frequency of the cell, so as to realize device discovery, paging and communication with the second UE.

因此，本发明实施例的小区间D2D通信的方法，通过第一小区的基站向第一小区内的第一UE发送第二小区信息，能够实现小区间D2D通信。Therefore, in the inter-cell D2D communication method in the embodiment of the present invention, the inter-cell D2D communication can be realized by sending the second cell information to the first UE in the first cell by the base station of the first cell.

在第一小区的基站向第一UE发送第二小区的D2D通信频率和小区ID时，第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获取第二小区的下行定时，将第二小区的下行定时作为向第二小区内的第二UE发送消息的发送定时。When the base station of the first cell sends the D2D communication frequency and cell ID of the second cell to the first UE, the first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell, and obtains the downlink synchronization signal of the second cell. Timing: The downlink timing of the second cell is used as the sending timing of sending the message to the second UE in the second cell.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

在第一小区的基站向第一UE发送第二小区的D2D通信频率、小区ID和第二小区与第一小区的定时差ΔT时，第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获取第二小区的下行定时T′₂，根据T=2(T_B+ΔT)-T′₂计算向第二小区内的第二UE发送消息的发送定时T。When the base station of the first cell sends the D2D communication frequency of the second cell, the cell ID, and the timing difference ΔT between the second cell and the first cell to the first UE, the first UE searches for the second cell on the D2D communication frequency of the second cell. The downlink synchronization signal of the cell obtains the downlink timing T'₂ of the second cell, and calculates the sending timing T of sending a message to the second UE in the second cell according to T=2(T_B +ΔT)-T'₂ .

在第一小区的基站向第一UE发送第二小区的D2D通信频率、小区ID和第二小区的基站定时T′_B时，第一UE在第二小区的D2D通信频率上搜索第二小区的下行同步信号，获取第二小区的下行定时T′₂，根据T=2T′_B-T′₂计算向第二小区内的第二UE发送消息的发送定时T。When the base station of the first cell sends the D2D communication frequency of the second cell, the cell ID, and the timing T′_B of the base station of the second cell to the first UE, the first UE searches for the D2D communication frequency of the second cell on the D2D communication frequency of the second cell. The downlink synchronization signal acquires the downlink timing T′₂ of the second cell, and calculates the sending timing T of sending a message to the second UE in the second cell according to T=2T′_B −T′₂ .

图6示出了根据本发明实施例的小区间D2D通信的方法300的示意性流程图。如图6所示，该方法300包括：Fig. 6 shows a schematic flowchart of a method 300 for inter-cell D2D communication according to an embodiment of the present invention. As shown in Figure 6, the method 300 includes:

S310，位于第一小区和第二小区共同覆盖区域内的第三UE获取第二小区信息，该第二小区信息包括：该第二小区的D2D通信频率和小区ID；S310. The third UE located in the common coverage area of the first cell and the second cell acquires information of the second cell, where the information of the second cell includes: a D2D communication frequency and a cell ID of the second cell;

S320，该第三UE向该第一小区内的第一用户设备UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。S320. The third UE sends the second cell information to the first user equipment UE in the first cell, so that the first UE can send the second cell information to the second cell in the second cell on the D2D communication frequency of the second cell. UE sends a message.

为了实现第一小区与第二小区间的D2D通信，位于第一小区和第二小区共同覆盖区域内的第三UE向第一小区内的第一UE发送第二小区的D2D通信频率和小区ID，这样，第一UE能够实现在第二小区的D2D通信频率上向第二UE发送消息，从而实现与第二UE之间的设备发现、寻呼和通信。In order to realize D2D communication between the first cell and the second cell, the third UE located in the common coverage area of the first cell and the second cell sends the D2D communication frequency and cell ID of the second cell to the first UE in the first cell In this way, the first UE can send a message to the second UE on the D2D communication frequency of the second cell, so as to realize device discovery, paging and communication with the second UE.

因此，本发明实施例的小区间D2D通信的方法，通过位于第一小区和第二小区共同覆盖区域内的第三UE向第一小区内的第一UE发送第二小区信息，能够实现小区间D2D通信。Therefore, in the inter-cell D2D communication method in the embodiment of the present invention, by sending the second cell information to the first UE in the first cell by the third UE located in the common coverage area of the first cell and the second cell, the inter-cell D2D communication can be realized. D2D communication.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

第一UE根据该第二小区信息确定向第二小区内的第二UE发送消息的发送定时的方式可参考前述实施例，为了简洁，在此不再赘述。The manner in which the first UE determines the sending timing of sending a message to the second UE in the second cell according to the information of the second cell may refer to the foregoing embodiments, and details are not repeated here for brevity.

可选地，在S320之前，该方法300还包括：Optionally, before S320, the method 300 also includes:

该第三UE接收该第一UE发送的请求该第二小区信息的寻呼请求消息；receiving, by the third UE, a paging request message requesting information about the second cell sent by the first UE;

S320包括：S320 includes:

该第三UE向该第一UE通过寻呼响应消息发送该第二小区信息。The third UE sends the second cell information to the first UE through a paging response message.

也就是说，第三UE接收到第一UE请求第二小区信息的寻呼请求消息后，通过寻呼响应消息向第一UE发送第二小区信息。That is to say, after receiving the paging request message in which the first UE requests the information of the second cell, the third UE sends the information of the second cell to the first UE through a paging response message.

下面将结合具体的例子详细描述本发明实施例。应注意，这些例子只是为了帮助本领域技术人员更好地理解本发明实施例，而非限制本发明实施例的范围。Embodiments of the present invention will be described in detail below in conjunction with specific examples. It should be noted that these examples are only intended to help those skilled in the art better understand the embodiments of the present invention, rather than limit the scope of the embodiments of the present invention.

图7是根据本发明实施例的小区间D2D通信的方法的过程的示意性流程图。图7对应的场景图如图2所示，下面结合图2的场景对图7进行详细描述。Fig. 7 is a schematic flow chart of the process of the method for inter-cell D2D communication according to an embodiment of the present invention. The scene graph corresponding to FIG. 7 is shown in FIG. 2 , and FIG. 7 will be described in detail below in conjunction with the scene in FIG. 2 .

在图2中，小区1内的UE1工作的D2D频率为eNB1下的f₁；小区2内的UE2工作的D2D频率为eNB2下的f₂。如图7所示，UE1与UE2进行D2D通信的过程如下。In FIG. 2 , the D2D frequency of UE1 in cell 1 is f₁ under eNB1 ; the D2D frequency of UE2 in cell 2 is f₂ under eNB2 . As shown in FIG. 7 , the process of D2D communication between UE1 and UE2 is as follows.

701，UE1从eNB1接收小区2信息。UE1从eNB1在自己的频率为f₁的D2D小区1上接收邻居eNB2的D2D小区2的相关信息，包括小区2的D2D通信频率f₂和小区ID，或者还包括小区2与小区1的定时差ΔT或小区2的基站定时T′_B或D2D帧结构等。701. UE1 receives cell 2 information from eNB1. UE1 receives information about D2D cell 2 of neighbor eNB2 from eNB1 on its own D2D cell 1 with frequency f₁ , including the D2D communication frequency f₂ and cell ID of cell 2, or the timing difference between cell 2 and cell 1 ΔT or cell 2 base station timing T′_B or D2D frame structure, etc.

702，UE2从eNB2接收小区1信息。UE2从eNB2在自己的频率为f₂的D2D小区2上接收邻居eNB1的D2D小区1的相关信息，包括小区1的D2D通信频率f₁和小区ID，或者还包括小区1与小区2的定时差或小区1的基站定时或D2D帧结构等。702. UE2 receives cell 1 information from eNB2. UE2 receives information about D2D cell 1 of neighbor eNB1 from eNB2 on its own D2D cell 2 with frequency f₂ , including the D2D communication frequency f₁ and cell ID of cell 1, or the timing difference between cell 1 and cell 2 Or base station timing of cell 1 or D2D frame structure, etc.

703，UE1搜索小区2的下行同步信号。UE1在频率f₂上根据小区2的小区ID搜索小区2的下行同步信号，获得小区2的下行定时T′₂。703, UE1 searches for a downlink synchronization signal of cell 2. The UE1 searches for the downlink synchronization signal of the cell 2 on the frequency f₂ according to the cell ID of the cell 2, and obtains the downlink timing T'_{2 of the cell 2} .

704，UE1确定发送定时。UE1根据小区2的下行定时T′₂确定向小区2内的UE发送消息的发送定时T。例如，具体确定方式可以为：T=T′₂，或者，T=2(T_B+ΔT)-T′₂，或者，T=2T′_B-T′2。704, UE1 determines the sending timing. UE1 determines the timing T for sending messages to UEs in cell₂ according to the downlink timing T'2 of cell 2. For example, the specific determination method may be: T=T'₂ , or, T=2(T_B +ΔT)-T'₂ , or, T=2T'_B -T'2.

705，UE2搜索小区1的下行同步信号。UE2在频率f₁上根据小区1的小区ID搜索小区1的下行同步信号，获得小区1的下行定时。705, UE2 searches for the downlink synchronization signal of cell 1. UE2 searches for the downlink synchronization signal of cell₁ on frequency f1 according to the cell ID of cell 1, and obtains the downlink timing of cell 1.

706，UE2确定发送定时。UE2根据小区1的下行定时确定向小区1内的UE发送消息的发送定时。具体确定方式可参见UE1。706, UE2 determines the sending timing. UE2 determines the timing of sending messages to UEs in cell 1 according to the downlink timing of cell 1 . For the specific determination method, refer to UE1.

707，UE1发送设备发现信号。UE1在邻居D2D小区2的频率f₂上以步骤704中确定的发送定时发送自己的设备发现信号。同时UE2仍然在自己的D2D频率f₂上接收设备发现信号，此时，UE2就能够发现UE1。707. UE1 sends a device discovery signal. UE1 sends its own device discovery signal on the frequency f2 of the neighbor D2D cell₂ at the sending timing determined in step 704 . At the same time,_UE2 is still receiving the device discovery signal on its own D2D frequency f2, and at this time, UE2 can discover UE1.

708，UE2发送设备发现信号。UE2在邻居D2D小区1的频率f₁上以步骤706中确定的发送定时发送自己的设备发现信号。同时UE1仍然在自己的D2D频率f₁上接收设备发现信号，此时，UE1就能够发现UE2。708. UE2 sends a device discovery signal. UE2 sends its own device discovery signal on the frequency f₁ of the neighbor D2D cell 1 at the sending timing determined in step 706 . At the same time,_UE1 is still receiving the device discovery signal on its own D2D frequency f1, and at this time, UE1 can discover UE2.

709，UE1向UE2发送寻呼请求消息。UE1与UE2相互发现后，如果UE1想与UE2通信，那么UE1就在频率f₂上向UE2发送寻呼请求消息。UE2仍然在自己的频率上接收寻呼消息，此时，UE2能够收到UE1的寻呼请求消息。709, UE1 sends a paging request message to UE2. After UE1 and UE2 discover each other, if UE1 wants to communicate with UE2, then UE1 sends a paging request message to_UE2 on frequency f2. UE2 still receives the paging message on its own frequency, and at this time, UE2 can receive the paging request message of UE1.

710，UE2向UE1发送寻呼响应消息。UE2在收到UE1的寻呼请求消息后，在频率f₁上向UE1发寻呼响应消息。UE1仍然在自己的频率上接收寻呼响应消息，此时，UE1能够收到UE2的寻呼响应消息。710. UE2 sends a paging response message to UE1. After receiving the paging request message from UE1, UE2 sends a paging response message to_UE1 on frequency f1. UE1 still receives the paging response message on its own frequency, and at this time, UE1 can receive the paging response message from UE2.

711，UE1与UE2开始通信。UE1和UE2在完成寻呼后，建立通信链路开始数据通信。数据通信的频率为接收方的D2D频率，即UE1在频率f₂上向UE2发送数据；UE2在频率f₁上向UE1发送数据。711. UE1 starts communication with UE2. After completing paging, UE1 and UE2 establish a communication link and start data communication. The frequency of data communication is the D2D frequency of the receiver, that is, UE1 sends data to UE2 on frequency f2;_UE2 sends data to_UE1 on frequency f1.

图9是根据本发明另一实施例的小区间D2D通信的方法的过程的示意性流程图。图9对应的场景图如图8所示，下面结合图8的场景对图9进行详细描述。Fig. 9 is a schematic flow chart of a process of a method for inter-cell D2D communication according to another embodiment of the present invention. The scene graph corresponding to FIG. 9 is shown in FIG. 8 , and FIG. 9 will be described in detail below in conjunction with the scene in FIG. 8 .

在图8中，小区1内的UE1工作的D2D频率为eNB1下的f₁；小区2内的UE2工作的D2D频率为eNB2下的f₂；UE3位于D2D小区1与D2D小区2的边缘，能够在f₁和f₂两个频率上进行D2D通信。如图9所示，UE1与UE2进行D2D通信的过程如下。In Figure 8, the D2D frequency of UE1 in cell₁ is f1 under eNB1; the D2D frequency of UE2 in cell₂ is f2 under eNB2; UE3 is located at the edge of D2D cell 1 and D2D cell 2, and can D2D communication is performed on two frequencies f₁ and f₂ . As shown in FIG. 9 , the process of D2D communication between UE1 and UE2 is as follows.

901，UE1向UE3发送寻呼请求消息。UE1通过设备发现，知道UE3同时在D2D小区1和D2D小区2做D2D通信。UE1通过寻呼请求消息向UE3请求邻居D2D小区2的相关信息，包括小区2的D2D通信频率和小区ID，或者还包括小区2与小区1的定时差或小区2的基站定时或D2D帧结构等。901. UE1 sends a paging request message to UE3. Through device discovery, UE1 knows that UE3 is performing D2D communication in D2D cell 1 and D2D cell 2 at the same time. UE1 requests information about neighboring D2D cell 2 from UE3 through a paging request message, including the D2D communication frequency and cell ID of cell 2, or the timing difference between cell 2 and cell 1 or the base station timing or D2D frame structure of cell 2, etc. .

902，UE3向UE1发送寻呼响应消息。UE3收到UE1的寻呼请求消息后，向UE1发送寻呼响应消息携带小区2的相关信息，包括小区2的D2D通信频率f₂和小区ID，或者还包括小区2与小区1的定时差ΔT或小区2的基站定时T′_B或D2D帧结构等。902. UE3 sends a paging response message to UE1. After receiving the paging request message from UE1, UE3 sends a paging response message to UE1 carrying the relevant information of cell 2, including the D2D communication frequency f2 and cell ID of cell₂ , or the timing difference ΔT between cell 2 and cell 1 Or the timing T′_B of the base station of cell 2 or the D2D frame structure, etc.

903，UE2向UE3发送寻呼请求消息。UE2通过设备发现，知道UE3同时在D2D小区1和D2D小区2做D2D通信。UE2通过寻呼请求消息向UE3请求邻居D2D小区1的相关信息，包括小区1的D2D通信频率和小区ID，或者还包括小区1与小区2的定时差或小区1的基站定时或D2D帧结构等。903, UE2 sends a paging request message to UE3. Through device discovery, UE2 knows that UE3 is performing D2D communication in D2D cell 1 and D2D cell 2 at the same time. UE2 requests information about neighboring D2D cell 1 from UE3 through a paging request message, including the D2D communication frequency and cell ID of cell 1, or the timing difference between cell 1 and cell 2 or the base station timing or D2D frame structure of cell 1, etc. .

904，UE3向UE2发送寻呼响应消息。UE3收到UE2的寻呼请求消息后，向UE2发送寻呼响应消息携带小区1的相关信息，包括小区1的D2D通信频率f₁和小区ID，或者还包括小区1与小区2的定时差或小区1的基站定时或D2D帧结构等。904. UE3 sends a paging response message to UE2. After receiving the paging request message from UE2, UE3 sends a paging response message to UE2 carrying the relevant information of cell 1, including the D2D communication frequency f₁ and cell ID of cell 1, or the timing difference or timing difference between cell 1 and cell 2. Base station timing or D2D frame structure of cell 1, etc.

905，UE1搜索小区2的下行同步信号。UE1在频率f₂上根据小区2的小区ID搜索小区2的下行同步信号，获得小区2的下行定时T′₂。905, UE1 searches for a downlink synchronization signal of cell 2. The UE1 searches for the downlink synchronization signal of the cell 2 on the frequency f₂ according to the cell ID of the cell 2, and obtains the downlink timing T'_{2 of the cell 2} .

906，UE1确定发送定时。UE1根据小区2的下行定时T′₂确定向小区2内的UE发送消息的发送定时T。例如，具体确定方式可以为：T=T′₂，或者，T=2(T_B+ΔT)-T′₂，或者，T=2T′_B-T′₂。906, UE1 determines the sending timing. UE1 determines the timing T for sending messages to UEs in cell₂ according to the downlink timing T'2 of cell 2. For example, the specific determination method may be: T=T'₂ , or, T=2(T_B +ΔT)-T'₂ , or, T=2T'_B -T'₂ .

907，UE2搜索小区1的下行同步信号。UE2在频率f₁上根据小区1的小区ID搜索小区1的下行同步信号，获得小区1的下行定时。907, UE2 searches for the downlink synchronization signal of cell 1. UE2 searches for the downlink synchronization signal of cell₁ on frequency f1 according to the cell ID of cell 1, and obtains the downlink timing of cell 1.

908，UE2确定发送定时。UE2根据小区1的下行定时确定向小区1内的UE发送消息的发送定时。具体确定方式可参见UE1。908, UE2 determines sending timing. UE2 determines the timing of sending messages to UEs in cell 1 according to the downlink timing of cell 1 . For the specific determination method, refer to UE1.

909，UE1发送设备发现信号。UE1在邻居D2D小区2的频率f₂上以步骤704中确定的发送定时发送自己的设备发现信号。同时UE2仍然在自己的D2D频率f₂上接收设备发现信号，此时，UE2就能够发现UE1。909. UE1 sends a device discovery signal. UE1 sends its own device discovery signal on the frequency f2 of the neighbor D2D cell₂ at the sending timing determined in step 704 . At the same time,_UE2 is still receiving the device discovery signal on its own D2D frequency f2, and at this time, UE2 can discover UE1.

910，UE2发送设备发现信号。UE2在邻居D2D小区1的频率f₁上以步骤706中确定的发送定时发送自己的设备发现信号。同时UE1仍然在自己的D2D频率f₁上接收设备发现信号，此时，UE1就能够发现UE2。910. UE2 sends a device discovery signal. UE2 sends its own device discovery signal on the frequency f₁ of the neighbor D2D cell 1 at the sending timing determined in step 706 . At the same time,_UE1 is still receiving the device discovery signal on its own D2D frequency f1, and at this time, UE1 can discover UE2.

911，UE1向UE2发送寻呼请求消息。UE1在与UE2相互发现后，如果UE1想与UE2通信，那么UE1就在频率f₂上向UE2发送寻呼请求消息。UE2仍然在自己的频率上接收寻呼消息，此时，UE2能够收到UE1的寻呼请求消息。911. UE1 sends a paging request message to UE2. After UE1 and UE2 discover each other, if UE1 wants to communicate with UE2, UE1 sends a paging request message to_UE2 on frequency f2. UE2 still receives the paging message on its own frequency, and at this time, UE2 can receive the paging request message of UE1.

912，UE2向UE1发送寻呼响应消息。UE2在收到UE1的寻呼请求消息后，在频率f₁上向UE1发寻呼响应消息。UE1仍然在自己的频率上接收寻呼响应消息，此时，UE1能够收到UE2的寻呼响应消息。912. UE2 sends a paging response message to UE1. After receiving the paging request message from UE1, UE2 sends a paging response message to_UE1 on frequency f1. UE1 still receives the paging response message on its own frequency, and at this time, UE1 can receive the paging response message from UE2.

913，UE1与UE2开始通信。UE1和UE2在完成寻呼后，建立通信链路开始数据通信。数据通信的频率为接收方的D2D频率，即UE1在频率f₂上向UE2发送数据；UE2在频率f₁上向UE1发送数据。913, UE1 and UE2 start communication. After completing paging, UE1 and UE2 establish a communication link and start data communication. The frequency of data communication is the D2D frequency of the receiver, that is, UE1 sends data to UE2 on frequency f2;_UE2 sends data to_UE1 on frequency f1.

因此，本发明实施例的小区间D2D通信的方法，通过在接收方的D2D频率上发送数据，能够实现小区间D2D通信。Therefore, the inter-cell D2D communication method in the embodiment of the present invention can realize the inter-cell D2D communication by sending data on the D2D frequency of the receiver.

上文中结合图1至图9，详细描述了根据本发明实施例的小区间D2D通信的方法，下面将结合图10至图15，描述根据本发明实施例的UE和基站。The method for inter-cell D2D communication according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 9 . The UE and the base station according to the embodiment of the present invention will be described below in conjunction with FIG. 10 to FIG. 15 .

图10示出了根据本发明实施例的UE400的示意性框图。如图10所示，该UE400包括：Fig. 10 shows a schematic block diagram of UE 400 according to an embodiment of the present invention. As shown in Figure 10, the UE400 includes:

接收模块410，用于获取该UE所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的设备到设备D2D通信频率和小区ID；The receiving module 410 is configured to obtain information of a second cell other than the first cell where the UE is located, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell;

搜索模块420，用于在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时；A search module 420, configured to search for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell;

确定模块430，用于根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；A determining module 430, configured to determine, according to the downlink timing of the second cell, the timing of sending a message to the second UE in the second cell;

发送模块440，用于在该第二小区的D2D通信频率上以该发送定时发送消息；A sending module 440, configured to send a message at the sending timing on the D2D communication frequency of the second cell;

该接收模块410还用于在该第一小区的D2D通信频率上接收该第二UE发送的消息。The receiving module 410 is also configured to receive a message sent by the second UE on the D2D communication frequency of the first cell.

本发明实施例的UE，通过获取第二小区的D2D通信频率和小区ID，在第二小区的D2D通信频率上向第二小区内的第二UE发送消息，能够实现小区间D2D通信。The UE in the embodiment of the present invention can realize inter-cell D2D communication by acquiring the D2D communication frequency and the cell ID of the second cell, and sending a message to the second UE in the second cell on the D2D communication frequency of the second cell.

在本发明实施例中，可选地，该接收模块410具体用于接收该第一小区的基站发送的该第二小区信息。In the embodiment of the present invention, optionally, the receiving module 410 is specifically configured to receive the second cell information sent by the base station of the first cell.

可选地，该接收模块410具体用于接收第三UE发送的该第二小区信息，该第三UE位于该第一小区和该第二小区共同覆盖区域内。Optionally, the receiving module 410 is specifically configured to receive the second cell information sent by a third UE, where the third UE is located in a common coverage area of the first cell and the second cell.

在本发明实施例中，可选地，该发送模块440具体用于在该第二小区的D2D通信频率上以该发送定时发送该第一UE的设备发现信号以便于该第二UE发现该第一UE；In the embodiment of the present invention, optionally, the sending module 440 is specifically configured to send the device discovery signal of the first UE at the sending timing on the D2D communication frequency of the second cell so that the second UE can discover the first UE's device discovery signal. a UE;

该接收模块410具体用于在该第一小区的D2D通信频率上接收该第二UE发送的该第二UE的设备发现信号，发现该第二UE；The receiving module 410 is specifically configured to receive a device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell, and discover the second UE;

该发送模块440具体用于在该第二小区的D2D通信频率上以该发送定时向该第二UE发送寻呼请求消息；The sending module 440 is specifically configured to send a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell;

该接收模块410具体用于在该第一小区的D2D通信频率上接收该第二UE发送的寻呼响应消息；The receiving module 410 is specifically configured to receive the paging response message sent by the second UE on the D2D communication frequency of the first cell;

该发送模块还440具体用于在该第二小区的D2D通信频率上以该发送定时向该第二UE发送数据；The sending module 440 is specifically configured to send data to the second UE at the sending timing on the D2D communication frequency of the second cell;

该接收模块410具体用于在该第一小区的D2D通信频率上接收该第二UE发送的数据。The receiving module 410 is specifically configured to receive data sent by the second UE on the D2D communication frequency of the first cell.

在本发明实施例中，可选地，该确定模块430具体用于将该第二小区的下行定时确定为该发送定时。In the embodiment of the present invention, optionally, the determining module 430 is specifically configured to determine the downlink timing of the second cell as the sending timing.

在本发明实施例中，可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差ΔT或者该第二小区的基站定时T′_B；In the embodiment of the present invention, optionally, the second cell information further includes: a timing difference ΔT between the second cell and the first cell or a base station timing T′_B of the second cell;

该确定模块430具体用于根据等式T=2(T_B+ΔT)-T′₂，或者T=2T′_B-T′₂，确定该发送定时T，The determination module 430 is specifically configured to determine the sending timing T according to the equation T=2(T_B +ΔT)-T′₂ , or T=2T′_B −T′₂ ,

其中，T_B为该第一小区的基站定时，T′₂为该第二小区的下行定时。Wherein, TB is the base station timing of the first cell, and_T'2 is the downlink timing of the_second cell.

在本发明实施例中，可选地，该接收模块410还用于通过设备发现，发现该第三UE；In this embodiment of the present invention, optionally, the receiving module 410 is also configured to discover the third UE through device discovery;

该发送模块440还用于向该第三UE发送寻呼请求消息请求该第二小区信息；The sending module 440 is further configured to send a paging request message to the third UE to request information about the second cell;

该接收模块410还用于接收该第三UE通过寻呼响应消息发送的该第二小区信息。The receiving module 410 is also configured to receive the second cell information sent by the third UE through a paging response message.

根据本发明实施例的UE400可对应于根据本发明实施例的小区间D2D通信的方法中的第一UE，并且UE400中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The UE400 according to the embodiment of the present invention may correspond to the first UE in the inter-cell D2D communication method according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of each module in the UE400 are to realize the For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

本发明实施例的UE，通过在第二小区的D2D通信频率上向第二小区内的第二UE发送消息，在第一小区的D2D通信频率上接收第二UE发送的消息，能够实现小区间D2D通信。The UE in the embodiment of the present invention can realize inter-cell communication by sending a message to the second UE in the second cell on the D2D communication frequency of the second cell and receiving the message sent by the second UE on the D2D communication frequency of the first cell. D2D communication.

图11示出了根据本发明实施例的基站500的示意性框图。如图11所示，该基站500包括：Fig. 11 shows a schematic block diagram of a base station 500 according to an embodiment of the present invention. As shown in Figure 11, the base station 500 includes:

获取模块510，用于获取该基站所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的设备到设备D2D通信频率和小区ID；An obtaining module 510, configured to obtain information of a second cell other than the first cell where the base station is located, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell;

发送模块520，用于向该第一小区内的第一用户设备UE发送该获取模块510获取的该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。The sending module 520 is configured to send the second cell information obtained by the obtaining module 510 to the first user equipment UE in the first cell, so that the first UE sends the second cell information to the second cell on the D2D communication frequency of the second cell. The second UE in the second cell sends the message.

本发明实施例的基站，通过向第一小区内的第一UE发送第二小区信息，能够实现小区间D2D通信。The base station in the embodiment of the present invention can realize inter-cell D2D communication by sending the second cell information to the first UE in the first cell.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

根据本发明实施例的基站500可对应于根据本发明实施例的小区间D2D通信的方法中的基站，并且基站500中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The base station 500 according to the embodiment of the present invention may correspond to the base station in the method for inter-cell D2D communication according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of each module in the base station 500 are respectively in order to realize the For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

图12示出了根据本发明另一实施例的UE600的示意性框图。如图12所示，该UE600包括：Fig. 12 shows a schematic block diagram of a UE 600 according to another embodiment of the present invention. As shown in Figure 12, the UE600 includes:

获取模块610，用于当该UE位于第一小区和第二小区共同覆盖区域内时，获取第二小区信息，该第二小区信息包括：该第二小区的设备到设备D2D通信频率和小区ID；An obtaining module 610, configured to obtain second cell information when the UE is located in the common coverage area of the first cell and the second cell, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell ;

发送模块620，用于向该第一小区内的第一UE发送该获取模块610获取的该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。a sending module 620, configured to send the second cell information obtained by the obtaining module 610 to the first UE in the first cell, so that the first UE can send information to the second cell on the D2D communication frequency of the second cell; The second UE within sends the message.

本发明实施例的UE，通过向第一小区内的第一UE发送第二小区信息，能够实现小区间D2D通信。The UE in the embodiment of the present invention can implement inter-cell D2D communication by sending the second cell information to the first UE in the first cell.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

如图12所示，可选地，该UE600还包括：As shown in FIG. 12, optionally, the UE600 further includes:

接收模块630，用于接收该第一UE发送的请求该第二小区信息的寻呼请求消息；A receiving module 630, configured to receive a paging request message requesting information of the second cell sent by the first UE;

该发送模块620还用于向该第一UE通过寻呼响应消息发送该第二小区信息。The sending module 620 is also configured to send the second cell information to the first UE through a paging response message.

根据本发明实施例的UE600可对应于根据本发明实施例的小区间D2D通信的方法中的第三UE，并且UE600中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The UE600 according to the embodiment of the present invention may correspond to the third UE in the inter-cell D2D communication method according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of each module in the UE600 are to realize the For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

图13示出了根据本发明又一实施例的UE1300的示意性框图。如图13所示，该UE1300包括：Fig. 13 shows a schematic block diagram of a UE 1300 according to yet another embodiment of the present invention. As shown in Figure 13, the UE1300 includes:

接收器1310，用于获取该UE所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的设备到设备D2D通信频率和小区ID；The receiver 1310 is configured to obtain information about a second cell other than the first cell where the UE is located, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell;

处理器1320，用于在该第二小区的D2D通信频率上根据该第二小区的小区ID搜索该第二小区的下行同步信号，以获取该第二小区的下行定时，并根据该第二小区的下行定时，确定向该第二小区内的第二UE发送消息的发送定时；The processor 1320 is configured to search for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell, and determining the timing of sending a message to a second UE in the second cell;

发送器1330，用于在该第二小区的D2D通信频率上以该发送定时发送消息；a transmitter 1330, configured to transmit a message at the transmission timing on the D2D communication frequency of the second cell;

该接收器1310还用于在该第一小区的D2D通信频率上接收该第二UE发送的消息。The receiver 1310 is also used for receiving the message sent by the second UE on the D2D communication frequency of the first cell.

可选地，该接收器1310具体用于接收该第一小区的基站发送的该第二小区信息。Optionally, the receiver 1310 is specifically configured to receive the second cell information sent by the base station of the first cell.

可选地，该接收器1310具体用于接收第三UE发送的该第二小区信息，该第三UE位于该第一小区和该第二小区共同覆盖区域内。Optionally, the receiver 1310 is specifically configured to receive the second cell information sent by a third UE, where the third UE is located in a common coverage area of the first cell and the second cell.

可选地，该发送器1330具体用于在该第二小区的D2D通信频率上以该发送定时发送该第一UE的设备发现信号以便于该第二UE发现该第一UE；Optionally, the transmitter 1330 is specifically configured to transmit the device discovery signal of the first UE at the transmission timing on the D2D communication frequency of the second cell, so that the second UE discovers the first UE;

该接收器1310具体用于在该第一小区的D2D通信频率上接收该第二UE发送的该第二UE的设备发现信号，发现该第二UE；The receiver 1310 is specifically configured to receive a device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell, and discover the second UE;

该发送器1330具体用于在该第二小区的D2D通信频率上以该发送定时向该第二UE发送寻呼请求消息；The transmitter 1330 is specifically configured to send a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell;

该接收器1310具体用于在该第一小区的D2D通信频率上接收该第二UE发送的寻呼响应消息；The receiver 1310 is specifically configured to receive the paging response message sent by the second UE on the D2D communication frequency of the first cell;

该发送器1330具体用于在该第二小区的D2D通信频率上以该发送定时向该第二UE发送数据；The transmitter 1330 is specifically configured to send data to the second UE at the sending timing on the D2D communication frequency of the second cell;

该接收器1310具体用于在该第一小区的D2D通信频率上接收该第二UE发送的数据。The receiver 1310 is specifically configured to receive data sent by the second UE on the D2D communication frequency of the first cell.

可选地，该处理器1320具体用于将该第二小区的下行定时确定为该发送定时。Optionally, the processor 1320 is specifically configured to determine the downlink timing of the second cell as the sending timing.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差ΔT或者该第二小区的基站定时T′_B；Optionally, the second cell information further includes: a timing difference ΔT between the second cell and the first cell or a base station timing T′_B of the second cell;

该处理器1320具体用于根据等式T=2(T_B+ΔT)-T′₂，或者T=2T′_B-T′₂，确定该发送定时T，The processor 1320 is specifically configured to determine the sending timing T according to the equation T=2(T_B +ΔT)-T′₂ , or T=2T′_B −T′₂ ,

其中，T_B为该第一小区的基站定时，T′₂为该第二小区的下行定时。Wherein, TB is the base station timing of the first cell, and_T'2 is the downlink timing of the_second cell.

可选地，该接收器1310还用于通过设备发现，发现该第三UE；Optionally, the receiver 1310 is also configured to discover the third UE through device discovery;

该发送器1330还用于向该第三UE发送寻呼请求消息请求该第二小区信息；The transmitter 1330 is further configured to send a paging request message to the third UE to request information about the second cell;

该接收器1310还用于接收该第三UE通过寻呼响应消息发送的该第二小区信息。The receiver 1310 is further configured to receive the second cell information sent by the third UE through a paging response message.

根据本发明实施例的UE1300可对应于根据本发明实施例的小区间D2D通信的方法中的第一UE，并且UE1300中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The UE 1300 according to the embodiment of the present invention may correspond to the first UE in the inter-cell D2D communication method according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of each module in the UE 1300 are to realize the For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

图14示出了根据本发明另一实施例的基站1400的示意性框图。如图14所示，该基站1400包括：Fig. 14 shows a schematic block diagram of a base station 1400 according to another embodiment of the present invention. As shown in Figure 14, the base station 1400 includes:

处理器1410，用于获取该基站所在的第一小区之外的第二小区信息，该第二小区信息包括：第二小区的设备到设备D2D通信频率和小区ID；The processor 1410 is configured to acquire information about a second cell other than the first cell where the base station is located, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell;

发送器1420，用于向该第一小区内的第一用户设备UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。The transmitter 1420 is configured to send the second cell information to the first user equipment UE in the first cell, so that the first UE sends a second cell information to the second cell in the second cell on the D2D communication frequency of the second cell. UE sends a message.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

根据本发明实施例的基站1400可对应于根据本发明实施例的小区间D2D通信的方法中的基站，并且基站1400中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The base station 1400 according to the embodiment of the present invention may correspond to the base station in the method for inter-cell D2D communication according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of each module in the base station 1400 are respectively in order to realize FIG. 1 to FIG. For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

图15示出了根据本发明又一实施例的UE1500的示意性框图。如图15所示，该UE1500包括：Fig. 15 shows a schematic block diagram of a UE 1500 according to yet another embodiment of the present invention. As shown in Figure 15, the UE1500 includes:

处理器1510，用于当该UE位于第一小区和第二小区共同覆盖区域内时，获取第二小区信息，该第二小区信息包括：该第二小区的设备到设备D2D通信频率和小区ID；Processor 1510, configured to acquire second cell information when the UE is located in the common coverage area of the first cell and the second cell, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell ;

发送器1520，用于向该第一小区内的第一UE发送该第二小区信息，以便于该第一UE在该第二小区的D2D通信频率上向该第二小区内的第二UE发送消息。The transmitter 1520 is configured to send the second cell information to the first UE in the first cell, so that the first UE sends the second cell information to the second UE in the second cell on the D2D communication frequency of the second cell information.

可选地，该第二小区信息还包括：该第二小区与该第一小区的定时差或者该第二小区的基站定时。Optionally, the second cell information further includes: a timing difference between the second cell and the first cell or a base station timing of the second cell.

如图15所示，可选地，该UE1500还包括：As shown in FIG. 15, optionally, the UE1500 further includes:

接收器1530，用于接收该第一UE发送的请求该第二小区信息的寻呼请求消息；The receiver 1530 is configured to receive a paging request message sent by the first UE to request information about the second cell;

该发送器1520还用于向该第一UE通过寻呼响应消息发送该第二小区信息。The transmitter 1520 is also configured to send the second cell information to the first UE through a paging response message.

根据本发明实施例的UE1500可对应于根据本发明实施例的小区间D2D通信的方法中的第三UE，并且UE1500中的各个模块的上述和其它操作和/或功能分别为了实现图1至图9中的各个方法的相应流程，为了简洁，在此不再赘述。The UE 1500 according to the embodiment of the present invention may correspond to the third UE in the inter-cell D2D communication method according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of the modules in the UE 1500 are respectively to realize the For the sake of brevity, the corresponding flow of each method in 9 will not be repeated here.

应理解，在本发明实施例中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。It should be understood that in the embodiments of the present invention, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. For example, A and/or B may mean that A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接，也可以是电的，机械的或其它的形式连接。In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等）执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器（ROM，Read-OnlyMemory）、随机存取存储器（RAM，Random Access Memory）、磁碟或者光盘等各种可以存储程序代码的介质。If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium Among them, several instructions are included to make a computer device (which may be a personal computer, server, or network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes.

以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the present invention. Modifications or replacements shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (11)

Translated fromChinese

1.一种小区间设备到设备D2D通信的方法，其特征在于，包括：1. A method for device-to-device D2D communication between cells, comprising:第一小区内的第一用户设备UE获取第二小区信息，所述第二小区信息包括：第二小区的D2D通信频率和小区标识ID；The first user equipment UE in the first cell acquires information of the second cell, where the information of the second cell includes: a D2D communication frequency and a cell ID of the second cell;所述第一UE在所述第二小区的D2D通信频率上根据所述第二小区的小区ID搜索所述第二小区的下行同步信号，以获取所述第二小区的下行定时；The first UE searches for the downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell;所述第一UE根据所述第二小区的下行定时，确定向所述第二小区内的第二UE发送消息的发送定时；The first UE determines the sending timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell;所述第一UE在所述第二小区的D2D通信频率上以所述发送定时发送消息，在所述第一小区的D2D通信频率上接收所述第二UE发送的消息。The first UE sends a message at the sending timing on the D2D communication frequency of the second cell, and receives the message sent by the second UE on the D2D communication frequency of the first cell.所述第二小区信息还包括：所述第二小区与所述第一小区的定时差ΔT或者所述第二小区的基站定时T′_B；The second cell information further includes: a timing difference ΔT between the second cell and the first cell or a base station timing T′_B of the second cell;所述第一UE根据所述第二小区的下行定时，确定向所述第二小区内的第二UE发送消息的发送定时，包括：The first UE determines the sending timing of sending a message to the second UE in the second cell according to the downlink timing of the second cell, including:所述第一UE根据等式T＝2(T_B+ΔT)-T′₂，或者T＝2T′_B-T′₂，确定所述发送定时T，The first UE determines the sending timing T according to the equation T=2(T_B +ΔT)-T'₂ , or T=2T'_B -T'₂ ,其中，T_B为所述第一小区的基站定时，T′₂为所述第二小区的下行定时。Wherein, TB is the base station timing of the first cell, and_T'2 is the downlink timing of the_second cell.2.根据权利要求1所述的方法，其特征在于，所述第一小区内的第一用户设备UE获取第二小区信息，包括：2. The method according to claim 1, wherein the acquisition of the second cell information by the first user equipment UE in the first cell comprises:所述第一UE接收所述第一小区的基站发送的所述第二小区信息。The first UE receives the second cell information sent by the base station of the first cell.3.根据权利要求1所述的方法，其特征在于，所述第一小区内的第一用户设备UE获取第二小区信息，包括：3. The method according to claim 1, wherein the acquisition of the second cell information by the first user equipment UE in the first cell comprises:所述第一UE接收第三UE发送的所述第二小区信息，所述第三UE位于所述第一小区和所述第二小区共同覆盖区域内。The first UE receives the second cell information sent by a third UE, where the third UE is located in a common coverage area of the first cell and the second cell.4.根据权利要求1所述的方法，其特征在于，所述第一UE在所述第二小区的D2D通信频率上以所述发送定时发送消息，在所述第一小区的D2D通信频率上接收所述第二UE发送的消息，包括：4. The method according to claim 1, wherein the first UE sends a message at the sending timing on the D2D communication frequency of the second cell, and sends a message on the D2D communication frequency of the first cell Receiving the message sent by the second UE includes:所述第一UE在所述第二小区的D2D通信频率上以所述发送定时发送所述第一UE的设备发现信号以便于所述第二UE发现所述第一UE，在所述第一小区的D2D通信频率上接收所述第二UE发送的所述第二UE的设备发现信号，发现所述第二UE；The first UE sends the device discovery signal of the first UE on the D2D communication frequency of the second cell at the sending timing so that the second UE can discover the first UE, and at the first receiving a device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the cell, and discovering the second UE;所述第一UE在所述第二小区的D2D通信频率上以所述发送定时向所述第二UE发送寻呼请求消息，在所述第一小区的D2D通信频率上接收所述第二UE发送的寻呼响应消息；The first UE sends a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell, and receives the second UE on the D2D communication frequency of the first cell. The paging response message sent;所述第一UE在所述第二小区的D2D通信频率上以所述发送定时向所述第二UE发送数据，在所述第一小区的D2D通信频率上接收所述第二UE发送的数据。The first UE sends data to the second UE at the sending timing on the D2D communication frequency of the second cell, and receives the data sent by the second UE on the D2D communication frequency of the first cell .5.根据权利要求3所述的方法，其特征在于，在所述第一UE接收第三UE发送的所述第二小区信息之前，所述方法还包括：5. The method according to claim 3, wherein before the first UE receives the second cell information sent by a third UE, the method further comprises:所述第一UE通过设备发现，发现所述第三UE；The first UE discovers the third UE through device discovery;所述第一UE向所述第三UE发送寻呼请求消息请求所述第二小区信息；The first UE sends a paging request message to the third UE to request information about the second cell;所述第一UE接收第三UE发送的所述第二小区信息，包括：The receiving by the first UE of the second cell information sent by the third UE includes:所述第一UE接收所述第三UE通过寻呼响应消息发送的所述第二小区信息。The first UE receives the second cell information sent by the third UE through a paging response message.6.一种用户设备UE，其特征在于，所述UE包括：6. A user equipment UE, characterized in that the UE comprises:接收模块，用于获取所述UE所在的第一小区之外的第二小区信息，所述第二小区信息包括：第二小区的设备到设备D2D通信频率和小区标识ID；A receiving module, configured to obtain information about a second cell other than the first cell where the UE is located, where the second cell information includes: a device-to-device D2D communication frequency and a cell ID of the second cell;搜索模块，用于在所述第二小区的D2D通信频率上根据所述第二小区的小区ID搜索所述第二小区的下行同步信号，以获取所述第二小区的下行定时；A search module, configured to search for a downlink synchronization signal of the second cell on the D2D communication frequency of the second cell according to the cell ID of the second cell, so as to obtain the downlink timing of the second cell;确定模块，用于根据所述第二小区的下行定时，确定向所述第二小区内的第二UE发送消息的发送定时；A determining module, configured to determine the timing of sending a message to a second UE in the second cell according to the downlink timing of the second cell;发送模块，用于在所述第二小区的D2D通信频率上以所述发送定时发送消息；a sending module, configured to send a message at the sending timing on the D2D communication frequency of the second cell;所述接收模块还用于在所述第一小区的D2D通信频率上接收所述第二UE发送的消息。The receiving module is further configured to receive a message sent by the second UE on the D2D communication frequency of the first cell.所述第二小区信息还包括：所述第二小区与所述第一小区的定时差ΔT或者所述第二小区的基站定时T′_B；The second cell information further includes: a timing difference ΔT between the second cell and the first cell or a base station timing T′_B of the second cell;所述确定模块具体用于根据等式T＝2(T_B+ΔT)-T′₂，或者T＝2T′_B-T′₂，确定所述发送定时T，The determining module is specifically configured to determine the sending timing T according to the equation T=2(T_B +ΔT)-T'₂ , or T=2T'_B -T'₂ ,其中，T_B为所述第一小区的基站定时，T′₂为所述第二小区的下行定时。Wherein, TB is the base station timing of the first cell, and_T'2 is the downlink timing of the_second cell.7.根据权利要求6所述的UE，其特征在于，所述接收模块具体用于，接收所述第一小区的基站发送的所述第二小区信息。7. The UE according to claim 6, wherein the receiving module is specifically configured to receive the second cell information sent by the base station of the first cell.8.根据权利要求6所述的UE，其特征在于，所述接收模块具体用于接收第三UE发送的所述第二小区信息，所述第三UE位于所述第一小区和所述第二小区共同覆盖区域内。8. The UE according to claim 6, wherein the receiving module is specifically configured to receive the second cell information sent by a third UE, and the third UE is located between the first cell and the second cell. Within the common coverage area of the two cells.9.根据权利要求6所述的UE，其特征在于，所述发送模块具体用于在所述第二小区的D2D通信频率上以所述发送定时发送所述第一UE的设备发现信号以便于所述第二UE发现所述第一UE；在所述第二小区的D2D通信频率上以所述发送定时向所述第二UE发送寻呼请求消息；在所述第二小区的D2D通信频率上以所述发送定时向所述第二UE发送数据；9. The UE according to claim 6, wherein the sending module is specifically configured to send the device discovery signal of the first UE at the sending timing on the D2D communication frequency of the second cell so as to facilitate The second UE discovers the first UE; sends a paging request message to the second UE at the sending timing on the D2D communication frequency of the second cell; sending data to the second UE at the sending timing;所述接收模块具体用于在所述第一小区的D2D通信频率上接收所述第二UE发送的所述第二UE的设备发现信号，发现所述第二UE；在所述第一小区的D2D通信频率上接收所述第二UE发送的寻呼响应消息；在所述第一小区的D2D通信频率上接收所述第二UE发送的数据。The receiving module is specifically configured to receive the device discovery signal of the second UE sent by the second UE on the D2D communication frequency of the first cell, and discover the second UE; receiving a paging response message sent by the second UE on a D2D communication frequency; receiving data sent by the second UE on a D2D communication frequency of the first cell.10.根据权利要求6至9中任一项所述的UE，其特征在于，所述确定模块具体用于将所述第二小区的下行定时确定为所述发送定时。10. The UE according to any one of claims 6 to 9, wherein the determining module is specifically configured to determine the downlink timing of the second cell as the sending timing.11.根据权利要求8所述的UE，其特征在于，所述接收模块还用于通过设备发现，发现所述第三UE；11. The UE according to claim 8, wherein the receiving module is further configured to discover the third UE through device discovery;所述发送模块还用于向所述第三UE发送寻呼请求消息请求所述第二小区信息；The sending module is further configured to send a paging request message to the third UE to request information about the second cell;所述接收模块还用于接收所述第三UE通过寻呼响应消息发送的所述第二小区信息。The receiving module is further configured to receive the second cell information sent by the third UE through a paging response message.