CN103874150A - Cell switching method, base station and user equipment (UE) - Google Patents

Abstract

Translated fromChinese

本发明实施例提供了一种小区切换的方法，该方法包括从用户设备UE接收目标小区的物理小区标识PCI；获取位置信息，其中位置信息用于表示UE的位置或者控制目标小区的目标基站的位置；根据目标小区的PCI和位置信息确定UE切换的目标小区；向UE切换的目标小区发送切换请求，进行UE的切换。本发明实施例还提供了一种基站和用户设备，用于根据目标小区的PCI和位置信息确定UE切换的目标小区。能够避免小区PCI冲突造成的目标小区无法确定的现象，并且降低PCI冲突情况下的小区切换延时。

An embodiment of the present invention provides a method for cell handover, the method includes receiving the physical cell identity PCI of the target cell from the user equipment UE; obtaining location information, wherein the location information is used to indicate the location of the UE or the location of the target base station controlling the target cell Location: Determine the target cell for UE handover according to the PCI and location information of the target cell; send a handover request to the target cell for UE handover, and perform UE handover. The embodiment of the present invention also provides a base station and user equipment, which are used to determine the target cell for UE handover according to the PCI and location information of the target cell. The phenomenon that the target cell cannot be determined caused by the PCI conflict of the cell can be avoided, and the cell switching delay in the case of the PCI conflict can be reduced.

Description

Translated fromChinese

小区切换的方法、基站和用户设备Cell handover method, base station and user equipment

技术领域technical field

本发明实施例涉及通信技术领域，更具体地，涉及小区切换的方法、基站和用户设备。The embodiments of the present invention relate to the technical field of communications, and more specifically, to a cell handover method, a base station, and user equipment.

背景技术Background technique

物理小区标识（Physical Cell Identity，PCI）是长期演进（Long TermEvolution，LTE）系统中的一个基本参数。很多物理层的处理过程和配置，例如物理随机接入信道（Physical Random Access Channel，PRACH）、小区专用参考信号（Cell-specific Reference Signal，CRS）在子帧中的位置、加扰和解扰、物理下行控制信道（Physical Downlink Control Channel，PDCCH）盲检、同步、随机接入、小区切换等都与PCI有关。由于PCI决定了CRS在子帧中的位置，若相邻小区的PCI相同，则相邻小区的CRS之间会产生干扰，从而影响信道估计精度以及PDCCH和物理下行共享信道（PhysicalDownlink Shared Channel，PDSCH）的解调。因此，每个小区的PCI由高层配置以保证至少相邻小区的PCI不同。Physical Cell Identity (PCI) is a basic parameter in the Long Term Evolution (LTE) system. The processing and configuration of many physical layers, such as the physical random access channel (Physical Random Access Channel, PRACH), the position of the cell-specific reference signal (Cell-specific Reference Signal, CRS) in the subframe, scrambling and descrambling, physical The downlink control channel (Physical Downlink Control Channel, PDCCH) blind detection, synchronization, random access, cell switching, etc. are all related to PCI. Since the PCI determines the position of the CRS in the subframe, if the PCIs of adjacent cells are the same, there will be interference between the CRSs of adjacent cells, which will affect the accuracy of channel estimation and the PDCCH and Physical Downlink Shared Channel (PDSCH). ) demodulation. Therefore, the PCI of each cell is configured by higher layers to ensure that at least the PCIs of neighboring cells are different.

但是，PCI的总数是有限的，例如在现有的LTE标准中，共有504个不同的PCI在全网范围内复用。因此在实际情况中，具有相同PCI的两个小区很可能距离并不远，例如相距仅几百米。However, the total number of PCIs is limited. For example, in the existing LTE standard, a total of 504 different PCIs are multiplexed across the entire network. Therefore, in actual situations, two cells with the same PCI are probably not far away, for example, only a few hundred meters apart.

在LTE系统中，每一个小区都具有全球唯一的28位的全局小区标识（Global Cell Identity，GCI）。在小区切换过程中，服务基站向目标基站发送切换请求时是通过GCI来标识的。如果服务基站周围有若干个小区具有相同的PCI，则服务基站无法将目标小区的PCI唯一地映射到GCI，或者映射错误，从而无法确定目标小区，造成小区切换失败。In the LTE system, each cell has a globally unique 28-bit global cell identity (Global Cell Identity, GCI). During the cell handover process, when the serving base station sends a handover request to the target base station, it is identified by the GCI. If several cells around the serving base station have the same PCI, the serving base station cannot uniquely map the PCI of the target cell to the GCI, or the mapping is wrong, so that the target cell cannot be determined, resulting in cell handover failure.

发明内容Contents of the invention

本发明实施例提供一种确定目标小区的方法、基站和用户设备，可以提高切换成功率。Embodiments of the present invention provide a method for determining a target cell, a base station and user equipment, which can improve the handover success rate.

第一方面，提供了一种小区切换的方法，包括：从用户设备UE接收目标小区的物理小区标识PCI；获取位置信息，其中所述位置信息用于表示所述UE的位置或者控制所述目标小区的目标基站的位置；根据所述目标小区的PCI和所述位置信息确定所述UE切换的目标小区；向所述UE切换的目标小区发送切换请求，进行所述UE的切换。In a first aspect, a method for cell handover is provided, including: receiving a physical cell identity PCI of a target cell from a user equipment UE; acquiring location information, wherein the location information is used to indicate the location of the UE or control the target cell The location of the target base station of the cell; determining the target cell for the UE handover according to the PCI of the target cell and the location information; sending a handover request to the target cell for the UE handover to perform handover of the UE.

结合第一方面，在第一种可能的实现方式中，所述获取位置信息包括：从所述UE接收用于表示所述UE的位置的所述位置信息；或者，根据所述UE的服务基站和所述服务基站的相邻基站从所述UE接收的信号，获取用于表示所述UE的位置的位置信息。With reference to the first aspect, in a first possible implementation manner, the obtaining the location information includes: receiving the location information indicating the location of the UE from the UE; or, according to a serving base station of the UE Obtaining location information indicating the location of the UE from the signal received by the neighboring base station of the serving base station.

结合第一方面或第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述根据所述目标小区的PCI和所述位置信息确定所述UE切换的目标小区，包括：确定具有所述PCI的多个小区；根据所述UE的位置，在所述具有所述PCI的多个小区中确定与所述UE之间距离最小的小区作为所述UE切换的目标小区。With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, determining the target cell for handover of the UE according to the PCI of the target cell and the location information, The method includes: determining a plurality of cells with the PCI; according to the position of the UE, determining a cell with the smallest distance to the UE among the plurality of cells with the PCI as a target cell for switching the UE .

结合第一方面，在第三种可能的实现方式中，所述获取位置信息包括：从所述UE接收用于表示所述目标基站的位置的所述位置信息。With reference to the first aspect, in a third possible implementation manner, the acquiring location information includes: receiving, from the UE, the location information indicating the location of the target base station.

结合第一方面或第一方面的第三种可能的实现方式，在第四种可能的实现方式中，所述根据所述目标小区的PCI和所述位置信息确定所述UE切换的目标小区，包括：确定具有所述PCI的多个小区；根据所述目标基站的位置，在所述具有所述PCI的多个小区中确定所述UE切换的目标小区。With reference to the first aspect or the third possible implementation manner of the first aspect, in a fourth possible implementation manner, determining the target cell for handover of the UE according to the PCI of the target cell and the location information, The method includes: determining a plurality of cells with the PCI; and determining a target cell for UE handover among the plurality of cells with the PCI according to the location of the target base station.

结合第一方面或第一方面的第三种可能的实现方式或第一方面的第四种可能的实现方式，在第五种可能的实现方式中，所述根据所述目标基站的位置，在所述具有所述PCI的多个小区中确定所述用于切换的目标小区，包括：根据所述目标基站的位置，确定所述目标基站与所述服务基站之间的第一距离；确定控制所述多个小区的多个基站与所述服务基站之间的多个第二距离；将与所述第一距离最接近的第二距离对应的小区确定为所述UE切换的目标小区。With reference to the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect, in a fifth possible implementation, according to the location of the target base station, in Determining the target cell for handover among the multiple cells with the PCI includes: determining a first distance between the target base station and the serving base station according to the location of the target base station; determining a control A plurality of second distances between the plurality of base stations of the plurality of cells and the serving base station; determining a cell corresponding to a second distance closest to the first distance as a target cell for the handover of the UE.

第二方面，提供了一种小区切换的方法，包括：确定目标小区的物理小区标识PCI，并确定位置信息，其中所述位置信息用于表示用户设备UE的位置或者控制所述目标小区的目标基站的位置；向服务基站发送所述PCI和所述位置信息。In a second aspect, a method for cell handover is provided, including: determining a physical cell identity PCI of a target cell, and determining location information, wherein the location information is used to indicate the location of a user equipment UE or a target for controlling the target cell The location of the base station; sending the PCI and the location information to the serving base station.

结合第二方面，在第一种可能的实现方式中，确定用于表示UE的位置的位置信息，包括：根据全球定位系统GPS信号和/或定位参考信号PRS确定所述UE的坐标；确定用于表示控制所述目标小区的目标基站的位置的位置信息，包括：根据GPS信号和/或PRS确定所述目标基站的坐标。With reference to the second aspect, in a first possible implementation manner, determining the position information used to indicate the position of the UE includes: determining the coordinates of the UE according to a global positioning system GPS signal and/or a positioning reference signal PRS; The location information indicating the location of the target base station controlling the target cell includes: determining the coordinates of the target base station according to GPS signals and/or PRS.

结合第二方面或第二方面的第一种可能的实现方式，在第二种可能的实现方式中，所述向服务基站发送所述PCI和所述位置信息，包括：通过无线资源控制RRC信令、物理上行共享信道PUSCH或者测量报告向所述服务基站发送所述位置信息。With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the sending the PCI and the location information to the serving base station includes: using a radio resource control RRC signal Send the location information to the serving base station by command, physical uplink shared channel PUSCH or measurement report.

第三方面，提供了一种基站，包括：接收单元，用于从用户设备UE接收目标小区的物理小区标识PCI；获取单元，用于获取位置信息，其中所述位置信息用于表示所述UE的位置或者控制所述目标小区的目标基站的位置；确定单元，用于根据所述目标小区的PCI和所述位置信息确定所述UE切换的目标小区；发送单元，用于向所述UE切换的目标小区发送切换请求，进行所述UE的切换。In a third aspect, a base station is provided, including: a receiving unit, configured to receive a physical cell identity PCI of a target cell from a user equipment UE; an obtaining unit, configured to obtain location information, wherein the location information is used to represent the UE The location of the target cell or the location of the target base station controlling the target cell; a determining unit, configured to determine a target cell for the UE to switch to according to the PCI of the target cell and the location information; a sending unit, for switching to the UE The target cell of the UE sends a handover request to perform handover of the UE.

结合第三方面，在第一种可能的实现方式中，所述获取单元具体用于通过所述接收单元从所述UE接收用于表示所述UE的位置的所述位置信息；或者，根据所述基站和所述基站的相邻基站从所述UE接收的信号，获取用于表示所述UE的位置的位置信息。With reference to the third aspect, in a first possible implementation manner, the obtaining unit is specifically configured to receive, from the UE through the receiving unit, the location information indicating the location of the UE; or, according to the The base station and the neighboring base stations of the base station acquire location information indicating the location of the UE from signals received by the UE.

结合第三方面或第三方面的第一种可能的实现方式，在第二种可能的实现方式中，所述确定单元具体用于确定具有所述PCI的多个小区；根据所述UE的位置，在所述具有所述PCI的多个小区中确定与所述UE之间距离最小的小区作为所述UE切换的目标小区。With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the determining unit is specifically configured to determine multiple cells with the PCI; according to the location of the UE Determining, among the plurality of cells having the PCI, a cell with the smallest distance to the UE as a target cell for handover of the UE.

结合第三方面，在第三种可能的实现方式中，所述获取单元具体用于通过所述接收单元从所述UE接收用于表示所述目标基站的位置的所述位置信息。With reference to the third aspect, in a third possible implementation manner, the obtaining unit is specifically configured to receive, from the UE through the receiving unit, the location information indicating the location of the target base station.

结合第三方面或第三方面的第三种可能的实现方式，在第四种可能的实现方式中，所述确定单元具体用于确定具有所述PCI的多个小区；根据所述目标基站的位置，在所述具有所述PCI的多个小区中确定所述UE切换的目标小区。With reference to the third aspect or the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the determining unit is specifically configured to determine multiple cells with the PCI; according to the target base station location, determining a target cell for UE handover among the plurality of cells with the PCI.

结合第三方面或第三方面的第三种可能的实现方式或第三方面的第四种可能的实现方式，在第五种可能的实现方式中，所述确定单元具体用于根据所述目标基站的位置，确定所述目标基站与所述服务基站之间的第一距离；确定控制所述多个小区的多个基站与所述服务基站之间的多个第二距离；将与所述第一距离最接近的第二距离对应的小区确定为所述UE切换的目标小区。With reference to the third aspect or the third possible implementation of the third aspect or the fourth possible implementation of the third aspect, in a fifth possible implementation, the determining unit is specifically configured to The location of the base station, determining a first distance between the target base station and the serving base station; determining a plurality of second distances between a plurality of base stations controlling the plurality of cells and the serving base station; The cell corresponding to the second distance closest to the first distance is determined as the target cell for the handover of the UE.

第四方面，提供了一种用户设备，包括：确定单元，用于确定目标小区的物理小区标识PCI，并确定位置信息，其中所述位置信息用于表示所述用户设备的位置或者控制所述目标小区的目标基站的位置；发送单元，用于向服务基站发送所述PCI和所述位置信息。In a fourth aspect, a user equipment is provided, including: a determining unit, configured to determine a physical cell identity PCI of a target cell, and determine location information, wherein the location information is used to indicate the location of the user equipment or control the The location of the target base station of the target cell; a sending unit, configured to send the PCI and the location information to a serving base station.

结合第四方面，在第一种可能的实现方式中，所述确定单元具体用于根据全球定位系统GPS信号和/或定位参考信号PRS确定所述用户设备的坐标；或者根据GPS信号和/或PRS确定所述目标基站的坐标。With reference to the fourth aspect, in a first possible implementation manner, the determining unit is specifically configured to determine the coordinates of the user equipment according to a Global Positioning System GPS signal and/or a positioning reference signal PRS; or according to a GPS signal and/or The PRS determines the coordinates of the target base station.

结合第四方面或第四方面的第一种可能的实现方式，在第二种可能的实现方式中，所述发送单元具体用于通过无线资源控制RRC信令、物理上行共享信道PUSCH或者测量报告向所述服务基站发送所述位置信息。With reference to the fourth aspect or the first possible implementation of the fourth aspect, in the second possible implementation, the sending unit is specifically configured to use radio resource control RRC signaling, physical uplink shared channel PUSCH or measurement report Send the location information to the serving base station.

基于上述技术方案，即使目标小区的PCI产生冲突，本发明实施例也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above technical solution, even if the PCI of the target cell conflicts, the embodiment of the present invention can determine the target cell to which the UE is handed over by combining the PCI of the target cell and location information, thereby improving the success rate of handover.

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，下面所描述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 described below 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为本发明一个实施例的小区切换的方法的示意性流程图。Fig. 1 is a schematic flowchart of a method for cell handover according to an embodiment of the present invention.

图2为本发明另一实施例的小区切换的方法的示意性流程图。Fig. 2 is a schematic flow chart of a cell handover method according to another embodiment of the present invention.

图3为本发明另一实施例的小区切换的方法的示意性流程图。Fig. 3 is a schematic flow chart of a cell handover method according to another embodiment of the present invention.

图4为本发明另一实施例的小区切换的方法的示意性流程图。Fig. 4 is a schematic flow chart of a cell handover method according to another embodiment of the present invention.

图5为本发明另一实施例的小区切换的方法的示意性流程图。Fig. 5 is a schematic flowchart of a method for cell handover according to another embodiment of the present invention.

图6为本发明另一实施例的小区切换的方法的示意性流程图。Fig. 6 is a schematic flow chart of a cell handover method according to another embodiment of the present invention.

图7为本发明一个实施例的基站的示意性框图。Fig. 7 is a schematic block diagram of a base station according to an embodiment of the present invention.

图8为本发明一个实施例的用户设备的示意性框图。Fig. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention.

图9是本发明另一实施例的基站的示意框图。Fig. 9 is a schematic block diagram of a base station according to another embodiment of the present invention.

图10是本发明另一实施例的用户设备的示意框图。Fig. 10 is a schematic block diagram of user equipment according to another embodiment of the present invention.

具体实施方式Detailed ways

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做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 making creative efforts shall fall within the protection scope of the present invention.

应理解，本发明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，GSM）系统、码分多址（CodeDivision Multiple Access，CDMA）系统、宽带码分多址（Wideband CodeDivision Multiple Access，WCDMA）系统、通用分组无线业务（General PacketRadio Service，GPRS）、长期演进（Long Term Evolution，LTE）系统、LTE频分双工（Frequency Division Duplex，FDD）系统、LTE时分双工（TimeDivision Duplex，TDD）、通用移动通信系统（Universal MobileTelecommunication System，UMTS）等。It should be understood that the technical solution of the present invention can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TimeDivision Duplex, TDD), Universal Mobile Telecommunications System (Universal MobileTelecommunication System, UMTS), etc.

还应理解，在本发明实施例中，用户设备（User Equipment，UE）可称之为终端（Terminal）、移动台（Mobile Station，MS）、移动终端（MobileTerminal）等，该用户设备可以经无线接入网（Radio Access Network，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, UE) may be referred to as a terminal (Terminal), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc., and the user equipment may be The access network (Radio Access Network, RAN) communicates with one or more core networks. 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 Mobile devices, which may be portable, pocket, handheld, embedded in a computer, or vehicle-mounted, exchange voice and/or data with the radio access network.

在本发明实施例中，基站可以是GSM或CDMA中的基站（BaseTransceiver Station，BTS），也可以是WCDMA中的基站（NodeB，NB），还可以是LTE中的演进型基站（Evolutional Node B，eNB或e-NodeB），本发明并不限定。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，但本发明所述的方法也可以类似地应用于其它实体之间(如终端和终端)的通信。In the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or e-NodeB), which is not limited in the present invention. For the convenience of description, the following embodiments will be described by taking the base station eNB and the user equipment UE as examples, but the method described in the present invention can also be similarly applied to communication between other entities (such as terminal and terminal).

服务基站上存储邻区的PCI和GCI的映射关系。在UE上报的PCI对应于多个GCI时，服务基站无法确定用于切换的目标小区，导致切换失败。The serving base station stores the mapping relationship between the PCI and the GCI of the neighboring cell. When the PCI reported by the UE corresponds to multiple GCIs, the serving base station cannot determine the target cell for handover, resulting in handover failure.

此时，服务基站可要求UE上报目标小区的GCI，再根据UE上报的GCI确定用于切换的目标小区。但是，这种方式增加了信令交互，导致切换时延变长。而且，UE从基站获取GCI需要通过解调物理广播信道（PhysicalBroadcast Channel，PBCH）获取部分GCI信息，然后盲检物理下行控制信道（Physical Downlink Control Channel，PDCCH）获得剩余的GCI信息。这一过程也会造成切换时延变长。At this time, the serving base station may require the UE to report the GCI of the target cell, and then determine the target cell for handover according to the GCI reported by the UE. However, this method increases signaling interaction, resulting in longer handover delay. Moreover, to obtain GCI from the base station, the UE needs to obtain part of the GCI information by demodulating the Physical Broadcast Channel (PBCH), and then blindly detect the Physical Downlink Control Channel (PDCCH) to obtain the remaining GCI information. This process will also result in longer switching delays.

图1为本发明一个实施例的小区切换的方法的示意性流程图。图1的方法可以由UE的服务基站执行。Fig. 1 is a schematic flowchart of a method for cell handover according to an embodiment of the present invention. The method in FIG. 1 may be performed by a serving base station of a UE.

101，从UE接收目标小区的PCI。101. Receive a PCI of a target cell from a UE.

UE的服务基站接收该UE上报的目标小区的PCI。其中，目标小区为该UE意图要切换到的小区。例如，UE接收到的该目标小区的信号强度符合该UE进行小区切换的条件，此时UE会向服务基站上报目标小区的PCI。The serving base station of the UE receives the PCI of the target cell reported by the UE. Wherein, the target cell is a cell to which the UE intends to switch. For example, the signal strength of the target cell received by the UE meets the conditions for the UE to perform cell handover, and at this time, the UE will report the PCI of the target cell to the serving base station.

本发明实施例对承载目标小区PCI的消息或数据的形式不作限制。例如，目标小区的PCI可以由无线资源控制（Radio Resource Control，RRC）信令、PUSCH或者测量报告承载。The embodiment of the present invention does not limit the form of the message or data carrying the PCI of the target cell. For example, the PCI of the target cell may be carried by radio resource control (Radio Resource Control, RRC) signaling, PUSCH or measurement report.

102，获取位置信息。位置信息用于表示UE的位置或者控制目标小区的目标基站的位置。102. Acquire location information. The location information is used to indicate the location of the UE or the location of the target base station controlling the target cell.

例如，位置信息可以是UE所处位置的坐标或者目标基站所处位置的坐标。其中，坐标可以是一维、二维或三维的坐标。应理解，本发明实施中的位置信息不限于坐标，也可以是其他任何可以表示基站或UE所处地理位置的信息。For example, the location information may be the coordinates of the location of the UE or the coordinates of the location of the target base station. Wherein, the coordinates may be one-dimensional, two-dimensional or three-dimensional coordinates. It should be understood that the location information in the implementation of the present invention is not limited to coordinates, and may also be any other information that can indicate the geographic location of the base station or UE.

可选地，作为一个实施例，服务基站可以从UE接收位置信息，或者服务基站可以自己测量得到位置信息。Optionally, as an embodiment, the serving base station may receive the location information from the UE, or the serving base station may measure the location information by itself.

应注意，本发明实施例对步骤101和102的执行顺序不作限制。例如，步骤101可以在步骤102之前执行，或者步骤101可以在步骤102之后执行，或者步骤101可以和步骤102同时执行。这些实施方式均落入本发明的范围内。It should be noted that the execution order ofsteps 101 and 102 is not limited in this embodiment of the present invention. For example, step 101 may be performed before step 102, or step 101 may be performed after step 102, or step 101 and step 102 may be performed simultaneously. These embodiments all fall within the scope of the present invention.

103，根据目标小区的PCI和位置信息确定UE切换的目标小区。103. Determine a target cell for UE handover according to the PCI and location information of the target cell.

换句话说，服务基站参照在步骤101中UE上报的目标小区的PCI以及在步骤102中确定的位置信息这两者，确定UE应切换到的目标小区。In other words, the serving base station determines the target cell to which the UE should handover with reference to both the PCI of the target cell reported by the UE instep 101 and the location information determined in step 102 .

例如，服务基站可存储周围基站的信息列表，该信息列表包括每个基站的PCI（在信息列表中有可能重复）以及对应的全局小区标识GCI（在信息列表中不重复）和位置信息。服务基站根据目标小区的PCI在该信息列表中映射得到至少一个GCI之后，结合在步骤102中获取到的位置信息来确定UE要切换到的目标小区。For example, the serving base station may store an information list of surrounding base stations, and the information list includes the PCI of each base station (possibly repeated in the information list), the corresponding global cell identity GCI (not repeated in the information list) and location information. After the serving base station maps at least one GCI in the information list according to the PCI of the target cell, it determines the target cell to which the UE is to handover in combination with the location information obtained in step 102 .

104，向UE切换的目标小区发送切换请求，进行UE的切换。104. Send a handover request to a target cell for handover of the UE, and perform handover of the UE.

服务基站向步骤103中确定的UE真正要切换到的目标小区的基站发送切换请求，从而执行后续切换操作，完成UE的小区切换。具体的切换过程和信令交互与现有技术相同，此处不再赘述。The serving base station sends a handover request to the base station of the target cell to which the UE is actually handed over determined instep 103, so as to perform subsequent handover operations and complete the UE's cell handover. The specific handover process and signaling interaction are the same as those in the prior art, and will not be repeated here.

基于上述技术方案，即使目标小区的PCI产生冲突，本发明实施例也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above technical solution, even if the PCI of the target cell conflicts, the embodiment of the present invention can determine the target cell to which the UE is handed over by combining the PCI of the target cell and location information, thereby improving the success rate of handover.

可选地，作为一个实施例，位置信息可以表示UE的位置。此时，在步骤102中，服务基站可以从UE接收用于表示该UE的位置的位置信息。或者，服务基站可测量得到UE的位置，例如服务基站可根据UE的服务基站和服务基站的相邻基站从UE接收的信号，获取用于表示UE的位置的位置信息。在服务基站测量得到UE的位置的情况下，服务基站可以通过测量UE的信号强度来估计UE的位置，进一步地，可以联合附近的其他基站进行定位，提高UE位置的精度。Optionally, as an embodiment, the location information may indicate the location of the UE. At this point, in step 102, the serving base station may receive location information from the UE indicating the location of the UE. Alternatively, the serving base station may measure the location of the UE, for example, the serving base station may acquire location information indicating the location of the UE according to signals received from the UE by the serving base station of the UE and neighboring base stations of the serving base station. When the serving base station obtains the location of the UE through measurement, the serving base station can estimate the location of the UE by measuring the signal strength of the UE. Furthermore, it can cooperate with other nearby base stations to perform positioning to improve the accuracy of the UE location.

在此情况下，作为另一实施例，在步骤103中，服务基站可确定具有步骤101中确定的PCI的多个小区。换句话说，服务基站确定在本地存储的信息列表中，具有同一PCI的小区有多个。此时服务基站可根据UE的位置，在具有该PCI的多个小区中确定与UE之间距离最小的小区作为用于切换UE的目标小区。In this case, as another embodiment, instep 103, the serving base station may determine multiple cells having the PCI determined instep 101. In other words, the serving base station determines that there are multiple cells with the same PCI in the locally stored information list. At this time, the serving base station may determine the cell with the smallest distance to the UE among the multiple cells having the PCI according to the location of the UE as the target cell for handing over the UE.

可选地，作为另一实施例，位置信息可表示目标基站的位置。此时在步骤102中，服务基站可以从UE接收用于表示目标基站的位置的位置信息。Optionally, as another embodiment, the location information may indicate the location of the target base station. At this time, in step 102, the serving base station may receive location information indicating the location of the target base station from the UE.

在此情况下，作为另一实施例，在步骤103中，服务基站可确定具有步骤101中确定的PCI的多个小区。换句话说，服务基站确定在本地存储的信息列表中，具有同一PCI的小区有多个。此时服务基站可根据目标基站的位置，在具有PCI的多个小区中确定用于切换UE的目标小区。例如，服务基站可确定该多个小区中相应基站与UE上报的目标基站位置最接近的小区为切换目标小区。In this case, as another embodiment, instep 103, the serving base station may determine multiple cells having the PCI determined instep 101. In other words, the serving base station determines that there are multiple cells with the same PCI in the locally stored information list. At this time, the serving base station may determine a target cell for handing over the UE among multiple cells with PCI according to the location of the target base station. For example, the serving base station may determine that among the multiple cells, the cell whose corresponding base station is closest to the target base station reported by the UE is the handover target cell.

例如，服务基站可根据目标基站的位置，确定目标基站与所述服务基站之间的第一距离；确定控制多个小区的多个基站与服务基站之间的多个第二距离；将与第一距离最接近的第二距离对应的小区确定为用于切换的目标小区。For example, the serving base station may determine the first distance between the target base station and the serving base station according to the location of the target base station; determine multiple second distances between multiple base stations controlling multiple cells and the serving base station; A cell corresponding to the closest second distance is determined as the target cell for handover.

因此，本发明实施例确定距离UE最近的基站所对应的小区，或者确定距离目标基站最近的基站所对应的小区，作为UE要切换到的目标小区，能够有效地解决小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, the embodiment of the present invention determines the cell corresponding to the base station closest to the UE, or determines the cell corresponding to the base station closest to the target base station as the target cell to be handed over to by the UE, which can effectively resolve the target cell caused by cell PCI conflicts Problems that cannot be determined improve the success rate of handover.

另外，本发明实施例无需UE通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，减少了信令交互，降低了PCI冲突情况下的小区切换时延。In addition, the embodiment of the present invention does not require the UE to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, which reduces signaling interaction and cell switching delay in the case of PCI conflict.

图2为本发明另一实施例的小区切换的方法的示意性流程图。图2的方法可以由服务基站执行。图2为图1的一个具体实施例，其中服务基站根据UE的位置确定UE切换的目标小区。Fig. 2 is a schematic flow chart of a cell handover method according to another embodiment of the present invention. The method in FIG. 2 can be executed by the serving base station. Fig. 2 is a specific embodiment of Fig. 1, wherein the serving base station determines the target cell for UE handover according to the location of the UE.

201，从UE接收目标小区的PCI和用于表示UE的位置的位置信息。201. Receive a PCI of a target cell and location information used to indicate a location of the UE from a UE.

本实施例中，UE测量并且向服务基站发送自己的位置，例如可通过全球定位系统（Global Positioning System，GPS）信号和/或定位参考信号（Positioning Reference Signal，PRS）确定UE的坐标。该位置可以表示为坐标的形式，但本发明实施例对位置的表示形式不作限定。该位置信息可以由RRC信令、或者PUSCH、或者测量报告承载。In this embodiment, the UE measures and sends its own position to the serving base station, for example, the coordinates of the UE may be determined through a Global Positioning System (GPS) signal and/or a Positioning Reference Signal (PRS). The position may be represented in the form of coordinates, but this embodiment of the present invention does not limit the representation form of the position. The location information may be carried by RRC signaling, or PUSCH, or a measurement report.

另外，UE可以在同一个消息中携带PCI和位置信息，也可以在不同的消息中分别携带PCI和位置信息，本发明实施例对此不作限制。In addition, the UE may carry the PCI and the location information in the same message, or carry the PCI and the location information in different messages, which is not limited in this embodiment of the present invention.

为便于描述，将步骤201中接收的目标小区的PCI表示为PCI_target。For ease of description, the PCI of the target cell received instep 201 is denoted as PCI_target .

202，确定具有PCI_target的多个小区。202. Determine multiple cells with a PCI_target .

服务基站存储有周围基站的信息列表，该信息列表包括每个基站控制的小区的PCI以及对应的GCI和位置信息。The serving base station stores an information list of surrounding base stations, and the information list includes the PCI of the cell controlled by each base station, the corresponding GCI and location information.

GCI为全球唯一的28位的小区标识，而PCI为504个全网复用的非唯一小区标识，所以在服务基站的信息列表中GCI不会重复，而PCI很有可能会重复。在LTE的云随机接入网（Cloud Random Access Network，CRAN），也可以称为云基站，的应用场景中，采用不同的基站分配不同的PCI的方案很可能导致小区PCI的匮乏，例如，由506个小区组成横向22个纵向23个且小区间距为50米的一个小区阵列，将504个可用的PCI分别分配给该小区阵列中的504个小区，在这种最理想的情况下，最远相隔22个小区的两个小区就会出现PCI相同的情况，距离仅为1.1km。在实际情况中，一个网络的部署很可能不是同时将所有的基站进行全局部署并按照前述最理想的方案分配PCI，而是根据信号分布以及用户情况，在已经建成的网络中插入更多的基站形成新的小区，在这种情况下，具有相同PCI的两个小区很可能相距仅几百米。GCI is a globally unique 28-bit cell identifier, while PCI is a non-unique cell identifier multiplexed by 504 networks. Therefore, GCI will not be repeated in the information list of the serving base station, but PCI is likely to be repeated. In the application scenario of LTE Cloud Random Access Network (Cloud Random Access Network, CRAN), which can also be called cloud base station, the scheme of assigning different PCIs to different base stations is likely to lead to the lack of PCI in the cell, for example, by 506 cells form a cell array with 22 cells in the horizontal direction and 23 cells in the vertical direction with a cell spacing of 50 meters. The 504 available PCIs are allocated to the 504 cells in the cell array. In this most ideal case, the farthest Two cells separated by 22 cells will have the same PCI, and the distance is only 1.1km. In actual situations, the deployment of a network is likely not to deploy all base stations globally at the same time and allocate PCI according to the aforementioned optimal scheme, but to insert more base stations into the established network according to signal distribution and user conditions. A new cell is formed, in which case two cells with the same PCI are likely to be only a few hundred meters apart.

在多个小区具有该PCI_target的情况下，通过上述信息列表的映射关系可以确定对应于PCI_target的多个小区的相应GCI和位置信息。In the case that multiple cells have the PCI_target , the corresponding GCI and location information of the multiple cells corresponding to the PCI_target can be determined through the mapping relationship of the above information list.

203，根据UE的位置，在具有PCI_target的多个小区中确定与UE之间距离最小的小区作为UE切换的目标小区。203. According to the location of the UE, determine the cell with the smallest distance to the UE among the multiple cells with the PCI_target as the target cell for UE handover.

服务基站通过信息列表中GCI和基站位置信息的映射关系，分别得到具有该PCI的多个小区的多个基站的位置，并计算UE与这些基站之间的距离。UE和基站的位置坐标可以是一维、二维或三维的。本实施例以三维坐标为例，假设UE的位置坐标为L₀(x₀,y₀,z₀)，基站的位置坐标为L_i(x_i,y_i,z_i)，其中i为基站的标号，i＝1,2,…K。K为正整数，表示服务基站的信息列表中的小区的总数。UE与各个基站之间的距离可以通过以下公式分别确定：The serving base station respectively obtains the positions of the multiple base stations of the multiple cells with the PCI through the mapping relationship between the GCI and the base station location information in the information list, and calculates the distance between the UE and these base stations. The location coordinates of UE and base station can be one-dimensional, two-dimensional or three-dimensional. This embodiment takes three-dimensional coordinates as an example, assuming that the position coordinates of the UE are L₀ (x₀ , y₀ , z₀ ), and the position coordinates of the base station are L_i (x_i , y_i , z_i ), where i is the base station The label of i=1,2,...K. K is a positive integer, representing the total number of cells in the information list of the serving base station. The distance between the UE and each base station can be respectively determined by the following formula:

${\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>0</span>0</span>}\mathrm{<span><span>i</span>i</span>}}<span><span>=</span>=</span>\sqrt{{<span><span>(</span>(</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>0</span>0</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>0</span>0</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>0</span>0</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}}<span><span>,</span>,</span><span><span>(</span>(</span>\mathrm{<span><span>i</span>i</span>}<span><span>=</span>=</span>\mathrm{<span><span>1,2</span>1,2</span>}<span><span>,</span>,</span><span><span>\&CenterDot;</span>\&CenterDot;</span><span><span>\&CenterDot;</span>\&CenterDot;</span><span><span>\&CenterDot;</span>\&Center\; Dot;</span>\mathrm{<span><span>K</span>K</span>}<span><span>)</span>)</span>$

服务基站从上述多个距离中确定一个最小值，例如，假设有3个小区具有该PCI_target，基站的标号分别为3、6和7，根据上述公式计算得到UE与三个基站之间的距离D₀₃、D₀₆和D₀₇，并且经过相互比较确定最小的距离为D₀₃。应理解，本发明实施例对于最小距离的确定方法不作限定。通过信息列表中的映射关系可以确定具有该最小的距离D₀₃的基站对应的GCI，从而根据该GCI确定UE所要切换到的目标小区。The serving base station determines a minimum value from the above multiple distances. For example, assuming that there are 3 cells with the PCI_target , the labels of the base stations are 3, 6 and 7 respectively, and the distance between the UE and the three base stations is calculated according to the above formula D₀₃ , D₀₆ and D₀₇ , and after comparing with each other, it is determined that the smallest distance is D₀₃ . It should be understood that the method for determining the minimum distance is not limited in this embodiment of the present invention. The GCI corresponding to the base station with the minimum distance D₀₃ can be determined through the mapping relationship in the information list, so that the target cell to which the UE is to be handed over is determined according to the GCI.

因此，本发明实施例根据目标小区的PCI确定具有该PCI的多个小区的GCI，之后进一步根据UE的位置和具有该PCI的多个小区的基站的位置确定UE要切换到的目标小区。从而有效地解决了小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, in the embodiment of the present invention, the GCIs of multiple cells having the PCI are determined according to the PCI of the target cell, and then the target cell to which the UE is to be handed over is further determined according to the location of the UE and the locations of the base stations of the multiple cells having the PCI. Therefore, the problem that the target cell cannot be determined caused by the PCI conflict of the cell is effectively solved, and the handover success rate is improved.

另外，本发明实施例无需通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，从而降低了PCI冲突情况下的小区切换延时。In addition, the embodiment of the present invention does not need to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, thereby reducing cell switching delay in the case of PCI conflict.

图3为本发明另一实施例的小区切换的方法的示意性流程图。图3的方法可以由服务基站执行。图3为图1的一个具体实施例，其中服务基站根据UE的位置确定用于切换该UE的目标小区。Fig. 3 is a schematic flow chart of a cell handover method according to another embodiment of the present invention. The method in FIG. 3 can be executed by the serving base station. Fig. 3 is a specific embodiment of Fig. 1, wherein the serving base station determines the target cell for handover of the UE according to the location of the UE.

301，从UE接收目标小区的PCI。301. Receive a PCI of a target cell from a UE.

为便于描述，将步骤301中接收的目标小区的PCI表示为PCI_target。For ease of description, the PCI of the target cell received in step 301 is denoted as PCI_target .

302，服务基站确定UE的位置信息。302. The serving base station determines location information of the UE.

本实施例中，服务基站自己测量得到UE的位置。例如，可根据UE的服务基站和服务基站的相邻基站从UE接收的信号，获取用于表示UE的位置的位置信息。In this embodiment, the serving base station measures and obtains the location of the UE by itself. For example, location information indicating the location of the UE may be acquired according to signals received from the UE by the serving base station of the UE and the neighboring base stations of the serving base station.

具体地，服务基站可以通过测量UE的信号强度初步估计UE的位置，并且可以联合附近基站对UE的信号强度的测量结果对UE进行更加精确的定位。例如，服务基站和服务基站的相邻基站测量UE的位置可以利用上行测量参考信号（Sound Reference Signal，SRS）来进行，然后各个基站联合起来采用上行到达时间差（Uplink Time Differences of Arrival，UTDOA）的方法对UE进行定位。上述UE定位方法仅仅是一种比较常用的方法，本发明实施例对于服务基站定位UE的方法不作限定。Specifically, the serving base station can preliminarily estimate the position of the UE by measuring the signal strength of the UE, and can combine the measurement results of the signal strength of the UE by nearby base stations to perform more precise positioning on the UE. For example, the serving base station and its neighboring base stations can use the uplink measurement reference signal (Sound Reference Signal, SRS) to measure the position of the UE, and then each base station jointly uses the uplink time difference of arrival (Uplink Time Differences of Arrival, UTDOA) The method locates the UE. The foregoing UE positioning method is only a commonly used method, and the embodiment of the present invention does not limit the method for the serving base station to locate the UE.

303，确定具有PCI_target的多个小区。303. Determine multiple cells with the PCI_target .

应理解，步骤303可以在步骤302之前或之后执行，也可以与步骤302同时执行。It should be understood that step 303 may be performed before or after step 302, or may be performed simultaneously with step 302.

304，根据UE的位置，在具有PCI_target的多个小区中确定与UE之间距离最小的基站所对应的小区作为UE切换的目标小区。304. According to the location of the UE, determine, among multiple cells with the PCI_target , a cell corresponding to a base station with the smallest distance to the UE as a target cell for UE handover.

具体的距离计算方法以及最小距离确定方法可以参照上述图2中步骤203，此处不再赘述。For the specific distance calculation method and minimum distance determination method, reference may be made to step 203 in FIG. 2 above, which will not be repeated here.

因此，本发明实施例根据目标小区的PCI确定具有该PCI的多个小区的GCI，之后进一步根据UE的位置和具有该PCI的多个小区的基站的位置确定UE要切换到的目标小区。从而有效地解决了小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, the embodiment of the present invention determines the GCIs of multiple cells with the PCI according to the PCI of the target cell, and then further determines the target cell to which the UE is handed over based on the location of the UE and the locations of the base stations of the multiple cells with the PCI. Therefore, the problem that the target cell cannot be determined caused by the PCI conflict of the cell is effectively solved, and the handover success rate is improved.

另外，本发明实施例无需通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，从而降低了PCI冲突情况下的小区切换延时。In addition, the embodiment of the present invention does not need to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, thereby reducing cell switching delay in the case of PCI conflict.

图4为本发明另一实施例的小区切换的方法的示意性流程图。图4的方法可以由服务基站执行。图4为图1的一个具体实施例，其中服务基站根据目标基站的位置确定用于切换该UE的目标小区。Fig. 4 is a schematic flow chart of a cell handover method according to another embodiment of the present invention. The method in FIG. 4 can be executed by the serving base station. Fig. 4 is a specific embodiment of Fig. 1, wherein the serving base station determines the target cell for handing over the UE according to the location of the target base station.

401，从UE接收目标小区的PCI。401. Receive a PCI of a target cell from a UE.

为便于描述，将步骤401中接收的目标小区的PCI表示为PCI_target。For ease of description, the PCI of the target cell received in step 401 is denoted as PCI_target .

402，从UE接收用于表示目标基站的位置的位置信息。402. Receive location information indicating a location of a target base station from a UE.

本实施例中，UE测量并向服务基站发送目标基站的位置。目标基站的位置可以表示为坐标的形式，本发明实施例对位置的表示形式不作限定。该位置信息可以由RRC信令、PUSCH或者测量报告承载。In this embodiment, the UE measures and sends the location of the target base station to the serving base station. The location of the target base station may be expressed in the form of coordinates, and the embodiment of the present invention does not limit the expression form of the location. The location information may be carried by RRC signaling, PUSCH or measurement report.

403，确定具有PCI_target的多个小区。403. Determine multiple cells with the PCI_target .

在多个小区具有PCI_target的情况下，通过上述信息列表的映射关系可以确定对应于PCI_target的多个小区的相应GCI和位置信息。In the case that multiple cells have PCI_targets , corresponding GCIs and location information of the multiple cells corresponding to the PCI_targets can be determined through the mapping relationship of the above information list.

404，根据目标基站的位置，在具有PCI_target的多个小区中确定UE切换的目标小区。404. According to the location of the target base station, determine a target cell for UE handover among multiple cells with the PCI_target .

服务基站通过信息列表中GCI和基站位置信息的映射关系，可以得到具有PCI_target的多个小区的对应基站的位置，UE真正要切换到的目标小区应包含在上述具有PCI_target的多个小区中。服务基站可通过匹配在步骤402中上报的基站位置和在步骤403中确定的基站位置，得到应该用于切换的目标小区。Through the mapping relationship between GCI and base station location information in the information list, the serving base station can obtain the locations of the corresponding base stations of multiple cells with PCI_target . The target cell to which the UE actually wants to switch should be included in the above multiple cells with PCI_target . The serving base station can obtain the target cell that should be used for handover by matching the base station location reported in step 402 with the base station location determined in step 403 .

但是，由于测量误差等原因，UE上报的目标基站的位置并不一定完全准确，而服务基站中存储的目标基站的位置是准确的，所以有可能无法通过UE上报的目标基站的位置与服务基站中存储的目标基站的位置进行简单的匹配来确定目标基站的GCI。在此情况下，服务基站可计算该服务基站与UE上报的目标基站之间的第一距离，并且分别计算该服务基站与具有PCI_target的多个小区的各个基站之间的多个第二距离，确定多个第二距离中与第一距离最相近的第二距离，具有该最相近的第二距离的基站即为应该用于切换的目标基站，通过信息列表中的映射关系可以确定该目标基站对应的GCI，从而根据该GCI确定UE应要切换到的目标小区。However, due to measurement errors and other reasons, the location of the target base station reported by the UE may not be completely accurate, while the location of the target base station stored in the serving base station is accurate, so it may not be possible to match the location of the target base station reported by the UE with the serving base station. The GCI of the target base station is determined by simple matching with the position of the target base station stored in . In this case, the serving base station may calculate the first distance between the serving base station and the target base station reported by the UE, and separately calculate multiple second distances between the serving base station and each base station of multiple cells with the PCI_target , determine the second distance closest to the first distance among the multiple second distances, the base station with the closest second distance is the target base station that should be used for handover, and the target can be determined through the mapping relationship in the information list The GCI corresponding to the base station, so as to determine the target cell to which the UE should handover according to the GCI.

因此，本发明实施例根据目标小区的PCI确定具有该PCI的多个小区的GCI，之后进一步根据UE的位置和具有该PCI的多个小区的基站的位置确定UE要切换到的目标小区。从而有效地解决了小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, the embodiment of the present invention determines the GCIs of multiple cells with the PCI according to the PCI of the target cell, and then further determines the target cell to which the UE is handed over based on the location of the UE and the locations of the base stations of the multiple cells with the PCI. Therefore, the problem that the target cell cannot be determined caused by the PCI conflict of the cell is effectively solved, and the handover success rate is improved.

另外，本发明实施例无需通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，从而降低了PCI冲突情况下的小区切换延时。In addition, the embodiment of the present invention does not need to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, thereby reducing cell switching delay in the case of PCI conflict.

图5为本发明另一实施例的小区切换的方法的示意性流程图。图5的方法可以由服务基站执行。图5为图4中步骤404的一个具体实施例，给出了根据目标基站的位置确定用于切换该UE的目标小区的具体方法。Fig. 5 is a schematic flowchart of a method for cell handover according to another embodiment of the present invention. The method in FIG. 5 can be executed by the serving base station. FIG. 5 is a specific embodiment of step 404 in FIG. 4 , which shows a specific method for determining a target cell for handover of the UE according to the location of the target base station.

501，根据目标基站的位置，确定目标基站与服务基站之间的第一距离。501. Determine a first distance between a target base station and a serving base station according to a location of a target base station.

服务基站计算自己与UE上报的目标基站的位置之间的第一距离，其中服务基站的位置可以是本地预先存储的，或通过GPS信号进行测量。服务基站和目标基站的位置坐标可以是一维、二维或三维的。本实施例以三维坐标为例，假设服务基站的位置坐标为L_S(x_S,y_S,z_S)，UE上报的目标基站的位置坐标为L_d(x_d,y_d,z_d)，上述第一距离可以通过以下公式确定：The serving base station calculates a first distance between itself and the location of the target base station reported by the UE, where the location of the serving base station may be locally pre-stored or measured through GPS signals. The location coordinates of the serving base station and the target base station may be one-dimensional, two-dimensional or three-dimensional. This embodiment takes three-dimensional coordinates as an example, assuming that the position coordinates of the serving base station are L_S (x_S , y_S , z_S ), and the position coordinates of the target base station reported by the UE are L_d (x_d , y_d , z_d ) , the above first distance can be determined by the following formula:

${\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>1</span>1</span>}}<span><span>=</span>=</span>\sqrt{{<span><span>(</span>(</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>d</span>d</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>d</span>d</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>d</span>d</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}}$

应理解，两个坐标之间的距离的计算方法不限于此，例如还可以用D12来表示第一距离，本发明实施例对此不作限定。It should be understood that the calculation method of the distance between two coordinates is not limited thereto, for example, D12 may also be used to represent the first distance, which is not limited in this embodiment of the present invention.

502，确定控制多个小区的多个基站与服务基站之间的多个第二距离。502. Determine multiple second distances between multiple base stations controlling multiple cells and a serving base station.

服务基站分别计算自己与控制上述具有PCI_target的多个小区的各个基站之间的多个第二距离。假设服务基站的位置坐标为L_S(x_S，y_S，z_S)，上述具有PCI_target的多个小区的各个基站的位置坐标为L_i(x_i,y_i,z_i)，其中i为基站的标号，i＝1,2,…Ki＝1,2,…K。K为正整数，表示服务基站的信息列表中的小区的总数。上述多个第二距离可以通过以下公式分别确定：The serving base station respectively calculates multiple second distances between itself and each base station controlling the multiple cells with the PCI_target . Assume that the location coordinates of the serving base station are L_S (x_S , y_S , z_S ), and the location coordinates of the base stations of the above multiple cells with PCI_targets are L_i (xi_, y_i , z_i ), where i is the label of the base station, i=1,2,...Ki=1,2,...K. K is a positive integer, representing the total number of cells in the information list of the serving base station. The above multiple second distances can be respectively determined by the following formulas:

${\mathrm{<span><span>D</span>D.</span>}}_{\mathrm{<span><span>2</span>2</span>}\mathrm{<span><span>i</span>i</span>}}<span><span>=</span>=</span>\sqrt{{<span><span>(</span>(</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>x</span>x</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>y</span>the\; y</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}<span><span>+</span>+</span>{<span><span>(</span>(</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>S</span>S</span>}}<span><span>-</span>-</span>{\mathrm{<span><span>z</span>z</span>}}_{\mathrm{<span><span>i</span>i</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>2</span>2</span>}}}<span><span>,</span>,</span><span><span>(</span>(</span>\mathrm{<span><span>i</span>i</span>}<span><span>=</span>=</span>\mathrm{<span><span>1,2</span>1,2</span>}<span><span>,</span>,</span><span><span>\&CenterDot;</span>\&CenterDot;</span><span><span>\&CenterDot;</span>\&CenterDot;</span><span><span>\&CenterDot;</span>\&CenterDot;</span>\mathrm{<span><span>K</span>K</span>}<span><span>)</span>)</span>$

应理解，两个坐标之间的距离的计算方法不限于此，例如还可以用D_2i²来表示第二距离，本发明实施例对此不作限定。It should be understood that the calculation method of the distance between two coordinates is not limited thereto, for example, D_2i² may also be used to represent the second distance, which is not limited in this embodiment of the present invention.

503，将与第一距离最接近的第二距离对应的小区确定为UE切换的目标小区。503. Determine a cell corresponding to a second distance closest to the first distance as a target cell for UE handover.

分别计算多个第二距离与第一距离之间的距离差，确定最小距离差，具有该最小距离差的第二距离所对应的基站即为目标基站，通过信息列表中的映射关系可以确定该目标基站对应的GCI，从而根据该GCI确定UE所要切换到的目标小区。具体地，距离差可以通过以下方法来计算：Calculate the distance difference between multiple second distances and the first distance respectively, determine the minimum distance difference, the base station corresponding to the second distance with the minimum distance difference is the target base station, and the mapping relationship in the information list can be used to determine the The GCI corresponding to the target base station, so as to determine the target cell to which the UE is handed over according to the GCI. Specifically, the distance difference can be calculated by the following method:

D_ui=|D₁-D_2i|,(i=1,2,…K)D_ui =|D₁ -D_2i |,(i=1,2,…K)

其中，假设有3个小区具有PCI_target，基站的标号分别为3、6和7，根据上述距离差公式计算得到三个距离差D_u3、D_u6和D_u7，经过相互比较确定最小的距离为D_u3，即标号为3的基站与UE上报的目标基站的位置最为接近，从而该标号为3的基站即为UE应要切换到的目标基站。通过信息列表中的映射关系可以确定具有该最小距离差的基站对应的GCI，从而根据该GCI确定UE应要切换到的目标小区。Among them, assuming that there are 3 cells with PCI_target , the labels of the base stations are 3, 6 and 7 respectively, and three distance differences D_u3 , D_u6 and D_u7 are calculated according to the above distance difference formula, and the minimum distance is determined by mutual comparison as D_u3 , that is, the base station numbered 3 is the closest to the target base station reported by the UE, so the base station numbered 3 is the target base station to which the UE should handover. The GCI corresponding to the base station with the minimum distance difference can be determined through the mapping relationship in the information list, so that the target cell to which the UE should be handed over is determined according to the GCI.

因此，本发明实施例根据目标小区的PCI确定具有该PCI的多个小区的GCI，之后进一步根据UE的位置和具有该PCI的多个小区的基站的位置确定UE要切换到的目标小区。从而有效地解决了小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, the embodiment of the present invention determines the GCIs of multiple cells with the PCI according to the PCI of the target cell, and then further determines the target cell to which the UE is handed over based on the location of the UE and the locations of the base stations of the multiple cells with the PCI. Therefore, the problem that the target cell cannot be determined caused by the PCI conflict of the cell is effectively solved, and the handover success rate is improved.

另外，本发明实施例无需通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，从而降低了PCI冲突情况下的小区切换延时。In addition, the embodiment of the present invention does not need to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, thereby reducing cell switching delay in the case of PCI conflict.

图6为本发明一个实施例的小区切换的方法的示意性流程图。图6的方法可以由UE执行。Fig. 6 is a schematic flowchart of a method for cell handover according to an embodiment of the present invention. The method in FIG. 6 may be executed by the UE.

601，确定目标小区的PCI，并确定位置信息。601. Determine the PCI of the target cell and determine location information.

当UE检测到符合信号强度要求的相邻小区（即目标小区）同步信号，UE将通过解调该目标小区的同步信号来获得PCI。具体地，504个不同的PCI被分成三组，每组168个，UE通过解调目标小区的主同步信号（PrimarySynchronization Signal，PSS）来确定目标小区的PCI属于三组中的哪一组，进一步解调辅同步信号（Secondary Synchronization Signal，SSS）确定该目标小区PCI在组中属于168个PCI的哪一个，结合起来可以确定该目标小区的PCI。When the UE detects a synchronization signal of an adjacent cell (that is, the target cell) that meets the signal strength requirements, the UE will obtain the PCI by demodulating the synchronization signal of the target cell. Specifically, 504 different PCIs are divided into three groups, 168 in each group, and the UE determines which of the three groups the PCI of the target cell belongs to by demodulating the primary synchronization signal (Primary Synchronization Signal, PSS) of the target cell, and further Demodulate the secondary synchronization signal (Secondary Synchronization Signal, SSS) to determine which of the 168 PCIs the target cell PCI belongs to in the group, and combine them to determine the PCI of the target cell.

位置信息用于表示UE的位置或者控制目标小区的目标基站的位置。例如，UE可以通过PRS来确定该UE的位置或者目标基站的位置。The location information is used to indicate the location of the UE or the location of the target base station controlling the target cell. For example, the UE may determine the location of the UE or the location of the target base station through the PRS.

可选地，作为一个实施例，UE采用基于蜂窝网络的定位方法（利用PRS）来确定自己的位置。可以基于观测到达时间差（Observed Time Difference ofArrival：OTDOA）的定位方法，通过测量附近基站的PRS的到达时间差，并结合附近基站的位置，计算出该UE自己的位置。应理解，UE的定位方法不限于此，还可以利用GPS对UE进行定位。也可以采用GPS和蜂窝网络结合的方法，例如基站辅助全球定位系统A-GPS来进行UE的定位。Optionally, as an embodiment, the UE uses a cellular network-based positioning method (using the PRS) to determine its own position. Based on the Observed Time Difference of Arrival (OTDOA) positioning method, the UE's own position can be calculated by measuring the time difference of arrival of the PRS of nearby base stations and combining the positions of nearby base stations. It should be understood that the UE positioning method is not limited thereto, and the UE may also be positioned using GPS. A method combining GPS and cellular network may also be used, for example, the base station assists the global positioning system A-GPS to locate the UE.

可选地，作为另一个实施例，UE采用基于蜂窝网络的定位方法（利用PRS）来确定目标基站的位置。具体确定方法可以参照上述UE确定自己的位置的方法，此处不再赘述。Optionally, as another embodiment, the UE uses a cellular network-based positioning method (using the PRS) to determine the position of the target base station. For a specific determination method, reference may be made to the above-mentioned method for the UE to determine its own location, which will not be repeated here.

应理解，UE确定目标小区的PCI和UE确定位置信息这两个操作的执行顺序可以互换，也可以同时执行，本发明实施例对此不作限定。It should be understood that the order in which the UE determines the PCI of the target cell and the UE determines the location information may be performed interchangeably or simultaneously, which is not limited in this embodiment of the present invention.

602，向服务基站发送PCI和位置信息。602. Send the PCI and location information to the serving base station.

确定了目标小区的PCI以及位置信息后，UE可以通过RRC信令、PUSCH或者测量报告向服务基站发送目标小区的PCI和/或位置信息。PCI和位置信息可以承载在一条消息或数据中，也可以承载在不同的消息或数据中。After determining the PCI and location information of the target cell, the UE may send the PCI and/or location information of the target cell to the serving base station through RRC signaling, PUSCH or measurement report. The PCI and location information can be carried in one message or data, or in different messages or data.

应理解，UE向服务基站发送PCI和位置信息这两个操作的执行顺序可以互换，也可以同时执行，本发明实施例对此不作限定。It should be understood that the order in which the UE sends the PCI and the location information to the serving base station can be interchanged or executed simultaneously, which is not limited in this embodiment of the present invention.

基于上述技术方案，即使目标小区的PCI产生冲突，本发明实施例也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above technical solution, even if the PCI of the target cell conflicts, the embodiment of the present invention can determine the target cell to which the UE is handed over by combining the PCI of the target cell and location information, thereby improving the success rate of handover.

图7为本发明一个实施例的基站的示意性框图。如图7所示，基站700可包括接收单元701、获取单元702、确定单元703和发送单元704。Fig. 7 is a schematic block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 7 , a base station 700 may include a receivingunit 701 , an acquiringunit 702 , a determiningunit 703 and a sendingunit 704 .

接收单元701从UE接收目标小区的PCI。获取单元702获取位置信息，其中位置信息用于表示该UE的位置或者控制目标小区的目标基站的位置。确定单元703根据目标小区的PCI和位置信息确定用于切换的目标小区。发送单元704向该UE切换的目标小区发送切换请求，进行该UE的切换。The receivingunit 701 receives the PCI of the target cell from the UE. The acquiringunit 702 acquires location information, where the location information is used to indicate the location of the UE or the location of a target base station controlling the target cell. The determiningunit 703 determines the target cell for handover according to the PCI and location information of the target cell. The sendingunit 704 sends a handover request to the handover target cell of the UE to perform handover of the UE.

基于上述基站700，即使目标小区的PCI产生冲突，基站700也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above base station 700, even if the PCI of the target cell conflicts, the base station 700 can determine the target cell to which the UE is to handover based on the PCI of the target cell and location information, thereby improving the success rate of handover.

基站700可执行图1-图5的方法实施例的各个步骤，为避免重复，不再赘述。The base station 700 can execute each step of the method embodiments shown in FIGS. 1-5 , and details are not repeated here to avoid repetition.

可选地，作为一个实施例，获取单元702可以通过接收单元701从UE接收用于表示UE的位置的位置信息。或者，获取单元702可以根据基站700和基站700的相邻基站从UE接收的信号，获取用于表示UE的位置的位置信息。Optionally, as an embodiment, the obtainingunit 702 may receive, from the UE through the receivingunit 701, location information used to indicate the location of the UE. Alternatively, the obtainingunit 702 may obtain location information indicating the location of the UE according to signals received from the UE by the base station 700 and neighboring base stations of the base station 700 .

可选地，作为另一个实施例，确定单元703可以根据接收单元701所接收到的目标基站的PCI确定具有PCI_target的多个小区，并且根据获取单元702接收到的UE的位置信息在具有PCI_target的多个小区中确定与UE之间距离最小的小区作为UE切换的目标小区。Optionally, as another embodiment, the determiningunit 703 may determine multiple cells with a PCI_target according to the PCI of the target base station received by the receivingunit 701, and according to the location information of the UE received by the obtainingunit 702 Among the multiple cells of_{the target} , the cell with the smallest distance to the UE is determined as the target cell for the handover of the UE.

可选地，作为另一个实施例，确定单元703可以通过接收单元701从UE接收用于表示基站700的位置的位置信息。Optionally, as another embodiment, the determiningunit 703 may receive location information indicating the location of the base station 700 from the UE through the receivingunit 701 .

可选地，作为另一个实施例，确定单元703可以根据接收单元701所接收到的目标基站的PCI确定具有PCI_target的多个小区，并且根据基站700的位置，在具有PCI_target的多个小区中确定UE切换的目标小区。Optionally, as another embodiment, the determiningunit 703 may determine multiple cells with the PCI_target according to the PCI of the target base station received by the receivingunit 701, and according to the location of the base station 700, among the multiple cells with the PCI_target Determine the target cell for UE handover.

可选地，作为另一个实施例，确定单元703可以根据基站700的位置，确定目标基站与基站700之间的第一距离，并且确定控制具有PCI_target多个小区的多个基站与基站700之间的多个第二距离；将与第一距离最接近的第二距离对应的小区确定为UE切换的目标小区。Optionally, as another embodiment, the determiningunit 703 may determine the first distance between the target base station and the base station 700 according to the position of the base station 700, and determine and control the distance between multiple base stations with multiple PCI_target cells and the base station 700. multiple second distances between them; determining a cell corresponding to a second distance closest to the first distance as a target cell for UE handover.

因此，本发明实施例中的基站能够根据目标小区的PCI确定具有该PCI的多个小区的GCI，之后进一步根据UE的位置和具有该PCI的多个小区的基站的位置确定UE要切换到的目标小区。从而有效地解决了小区PCI冲突造成的目标小区无法确定的问题，提高了切换成功率。Therefore, the base station in the embodiment of the present invention can determine the GCI of multiple cells with the PCI according to the PCI of the target cell, and then further determine the UE to be handed over to according to the position of the UE and the positions of the base stations of the multiple cells with the PCI. target area. Therefore, the problem that the target cell cannot be determined caused by the PCI conflict of the cell is effectively solved, and the handover success rate is improved.

另外，本发明实施例无需通过PBCH解调和PDCCH盲检的方法来获得目标小区的GCI，从而降低了PCI冲突情况下的小区切换延时。In addition, the embodiment of the present invention does not need to obtain the GCI of the target cell through PBCH demodulation and PDCCH blind detection, thereby reducing cell switching delay in the case of PCI conflict.

图8为本发明一个实施例的用户设备的示意性框图。如图8所示，用户设备800可以包括确定单元802和发送单元803。Fig. 8 is a schematic block diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 8 , a user equipment 800 may include a determiningunit 802 and a sendingunit 803 .

确定单元802确定目标小区的PCI，并确定位置信息，其中位置信息用于表示用户设备800的位置或者控制目标小区的目标基站的位置。发送单元803向基站700发送PCI和位置信息。The determiningunit 802 determines the PCI of the target cell and determines location information, where the location information is used to indicate the location of the user equipment 800 or the location of the target base station controlling the target cell. The sendingunit 803 sends the PCI and location information to the base station 700 .

基于上述用户设备800，即使目标小区的PCI产生冲突，用户设备800确定并向基站700发送目标小区的PCI和位置信息，使得基站700能够结合目标小区的PCI和位置信息确定用户设备800要切换到的目标小区，提高了切换的成功率。Based on the above user equipment 800, even if the PCI of the target cell conflicts, the user equipment 800 determines and sends the PCI and location information of the target cell to the base station 700, so that the base station 700 can determine that the user equipment 800 should switch to based on the PCI and location information of the target cell. The target cell, which improves the success rate of handover.

可选地，作为一个实施例，确定单元802可以根据GPS信号和/或PRS确定用户设备800的坐标；或者根据GPS信号和/或PRS确定目标基站的坐标。Optionally, as an embodiment, the determiningunit 802 may determine the coordinates of the user equipment 800 according to the GPS signal and/or the PRS; or determine the coordinates of the target base station according to the GPS signal and/or the PRS.

可选地，作为另一个实施例，发送单元803可以通过RRC信令、PUSCH或者测量报告向基站700发送位置信息。Optionally, as another embodiment, the sendingunit 803 may send the location information to the base station 700 through RRC signaling, PUSCH or measurement report.

可选地，用户设备800还可以包括接收单元801用于接收目标小区的同步信号和用户设备800附近基站的PRS。Optionally, the user equipment 800 may further include a receiving unit 801 for receiving a synchronization signal of a target cell and a PRS of a base station near the user equipment 800 .

本发明实施例的通信系统可包括上述基站700或用户设备800。The communication system in this embodiment of the present invention may include the foregoing base station 700 or user equipment 800 .

图9是本发明另一实施例的基站的示意框图。图9的基站900包括处理器901、存储器902和接收器903。处理器901、存储器902和接收器903通过总线系统904相连。Fig. 9 is a schematic block diagram of a base station according to another embodiment of the present invention. Thebase station 900 in FIG. 9 includes aprocessor 901 , a memory 902 and areceiver 903 . Theprocessor 901 , the memory 902 and thereceiver 903 are connected via abus system 904 .

存储器902用于存储使得处理器901执行以下操作的指令：获取位置信息，其中位置信息用于表示UE的位置或者控制目标小区的目标基站的位置；根据目标小区的PCI和位置信息确定用于切换的目标小区。接收器903用于从UE接收目标小区的PCI。The memory 902 is used to store instructions that enable theprocessor 901 to perform the following operations: obtain location information, where the location information is used to indicate the location of the UE or the location of the target base station controlling the target cell; target area. Thereceiver 903 is configured to receive the PCI of the target cell from the UE.

基于上述技术方案，即使目标小区的PCI产生冲突，本发明实施例也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above technical solution, even if the PCI of the target cell conflicts, the embodiment of the present invention can determine the target cell to which the UE is handed over by combining the PCI of the target cell and location information, thereby improving the success rate of handover.

此外，基站900还可以包括发射器905及天线906等，处理器901控制基站900的操作，处理器901还可以称为中央处理单元（Central ProcessingUnit，CPU）。存储器902可以包括只读存储器和随机存取存储器，并向处理器901提供指令和数据。存储器902的一部分还可以包括非易失性随机存取存储器（NVRAM）。具体的应用中，接收器903和发射器905可以耦合到天线906。基站900的各个组件通过总线系统904耦合在一起，其中总线系统904除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统904。In addition, thebase station 900 may also include atransmitter 905, an antenna 906, etc., and theprocessor 901 controls the operation of thebase station 900, and theprocessor 901 may also be called a central processing unit (Central Processing Unit, CPU). The memory 902 may include read-only memory and random-access memory, and provides instructions and data to theprocessor 901 . A portion of memory 902 may also include non-volatile random access memory (NVRAM). In a specific application, thereceiver 903 and thetransmitter 905 may be coupled to the antenna 906 . Various components of thebase station 900 are coupled together through abus system 904, where thebus system 904 may include a power bus, a control bus, and a status signal bus, etc. in addition to a data bus. However, for clarity of illustration, the various buses are labeled asbus system 904 in the figure.

上述本发明实施例揭示的方法可以应用于处理器901中，或者由处理器901实现。处理器901可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器901中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器901可以是通用处理器、数字信号处理器（DSP）、专用集成电路（ASIC）、现成可编程门阵列（FPGA）或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器902，处理器901读取存储器902中的信息，结合其硬件完成上述方法的步骤。The methods disclosed in the foregoing embodiments of the present invention may be applied to theprocessor 901 or implemented by theprocessor 901 . Theprocessor 901 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in theprocessor 901 or instructions in the form of software. The above-mentionedprocessor 901 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 902, and theprocessor 901 reads the information in the memory 902, and completes the steps of the above method in combination with its hardware.

可选地，作为一个实施例，处理器901根据基站900和基站900的相邻基站从UE接收的信号，获取用于表示UE的位置的位置信息Optionally, as an embodiment, theprocessor 901 acquires location information indicating the location of the UE according to signals received from the UE by thebase station 900 and neighboring base stations of thebase station 900

可选地，作为另一实施例，处理器901确定具有PCI_target的多个小区；根据UE的位置，在具有PCI_target的多个小区中确定与UE之间距离最小的小区作为用于切换的目标小区。Optionally, as another embodiment, theprocessor 901 determines multiple cells with the PCI_target ; and according to the location of the UE, determines the cell with the smallest distance to the UE among the multiple cells with the PCI_target as the cell used for the handover target area.

可选地，作为另一实施例，处理器901确定具有PCI_target的多个小区；根据目标基站的位置，在具有PCI_target的多个小区中确定用于切换的目标小区。Optionally, as another embodiment, theprocessor 901 determines multiple cells with the PCI_target ; and determines the target cell for handover among the multiple cells with the PCI_target according to the location of the target base station.

可选地，作为另一实施例，处理器901根据目标基站的位置，确定目标基站与基站900之间的第一距离；确定控制具有PCI_target的多个小区的多个基站与基站900之间的多个第二距离；将与第一距离最接近的第二距离对应的小区确定为所述用于切换的目标小区。Optionally, as another embodiment, theprocessor 901 determines the first distance between the target base station and thebase station 900 according to the location_{of the target base station; determines the distance between multiple base stations controlling multiple cells with the PCI target} and thebase station 900 multiple second distances; determining the cell corresponding to the second distance closest to the first distance as the target cell for handover.

图10是本发明另一实施例的用户设备的示意框图。图10的用户设备1000包括处理器1001、存储器1002和发射器1003。处理器1001、存储器1002和发射器1003通过总线系统1004相连。Fig. 10 is a schematic block diagram of user equipment according to another embodiment of the present invention. Theuser equipment 1000 in FIG. 10 includes aprocessor 1001 , a memory 1002 and atransmitter 1003 . Theprocessor 1001 , memory 1002 andtransmitter 1003 are connected via abus system 1004 .

存储器1002用于存储使得处理器1001执行以下操作的指令：确定目标小区的PCI，并确定位置信息，其中位置信息用于表示用户设备1000的位置或者控制目标小区的目标基站的位置。发射器1003用于向基站900发送处理器1001确定的PCI和位置信息。The memory 1002 is used to store instructions for theprocessor 1001 to perform the following operations: determine the PCI of the target cell, and determine location information, where the location information is used to indicate the location of theuser equipment 1000 or the location of the target base station controlling the target cell. Thetransmitter 1003 is configured to send the PCI and location information determined by theprocessor 1001 to thebase station 900 .

基于上述技术方案，即使目标小区的PCI产生冲突，本发明实施例也能够结合目标小区的PCI和位置信息确定UE要切换到的目标小区，提高了切换的成功率。Based on the above technical solution, even if the PCI of the target cell conflicts, the embodiment of the present invention can determine the target cell to which the UE is handed over by combining the PCI of the target cell and location information, thereby improving the success rate of handover.

此外，用户设备1000还可以包括接收器1005及天线1006等，处理器1001控制用户设备1000的操作，处理器1001还可以称为中央处理单元（Central Processing Unit，CPU）。存储器1002可以包括只读存储器和随机存取存储器，并向处理器1001提供指令和数据。存储器1002的一部分还可以包括非易失性随机存取存储器（NVRAM）。具体的应用中，发射器1003和接收器1005可以耦合到天线1006。基站1000的各个组件通过总线系统1005耦合在一起，其中总线系统1004除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统1004。In addition, theuser equipment 1000 may also include areceiver 1005, an antenna 1006, etc., and theprocessor 1001 controls the operation of theuser equipment 1000, and theprocessor 1001 may also be called a central processing unit (Central Processing Unit, CPU). The memory 1002 may include read-only memory and random-access memory, and provides instructions and data to theprocessor 1001 . A portion of memory 1002 may also include non-volatile random access memory (NVRAM). In a specific application, thetransmitter 1003 and thereceiver 1005 may be coupled to the antenna 1006 . Various components of thebase station 1000 are coupled together through abus system 1005, wherein thebus system 1004 may include a power bus, a control bus, and a status signal bus, etc. in addition to a data bus. However, for clarity of illustration, the various buses are labeled asbus system 1004 in the figure.

上述本发明实施例揭示的方法可以应用于处理器1001中，或者由处理器1001实现。处理器1001可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器1001中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器1001可以是通用处理器、数字信号处理器（DSP）、专用集成电路（ASIC）、现成可编程门阵列（FPGA）或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1002，处理器1001读取存储器1002中的信息，结合其硬件完成上述方法的步骤。The methods disclosed in the foregoing embodiments of the present invention may be applied to theprocessor 1001 or implemented by theprocessor 1001 . Theprocessor 1001 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in theprocessor 1001 or instructions in the form of software. The above-mentionedprocessor 1001 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 1002, and theprocessor 1001 reads the information in the memory 1002, and completes the steps of the above method in combination with its hardware.

可选地，作为一个实施例，处理器1001根据GPS信号和/或PRS确定用户设备1000的坐标；或者根据GPS信号和/或PRS确定目标基站的坐标。Optionally, as an embodiment, theprocessor 1001 determines the coordinates of theuser equipment 1000 according to the GPS signal and/or the PRS; or determines the coordinates of the target base station according to the GPS signal and/or the PRS.

可选地，作为另一实施例，发射器1003通过RRC信令、PUSCH或者测量报告向基站900发送位置信息。Optionally, as another embodiment, thetransmitter 1003 sends the location information to thebase station 900 through RRC signaling, PUSCH or measurement report.

另外，接收器1005可以接收目标小区的同步信号和用户设备1000附近基站的PRS提供给处理器1001，用于确定目标小区的PCI和位置信息。In addition, thereceiver 1005 may receive the synchronization signal of the target cell and the PRS of the base stations near theuser equipment 1000 to provide theprocessor 1001 for determining the PCI and location information of the target cell.

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中描述的各方法步骤和单元，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实施例的步骤及组成。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。本领域普通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, in combination with the various method steps and units described in the embodiments disclosed herein, they can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the possibility of hardware and software For interchangeability, in the above description, the steps and components of each embodiment 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 of ordinary skill in the art may use different methods to implement the described functions for each particular application, but such implementation should not be regarded as exceeding the scope of the present invention.

结合本文中所公开的实施例描述的方法或步骤可以用硬件、处理器执行的软件程序，或者二者的结合来实施。软件程序可以置于随机存储器（RAM）、内存、只读存储器（ROM）、电可编程ROM、电可擦除可编程ROM、寄存器、硬盘、可移动磁盘、CD-ROM、或技术领域内所公知的任意其它形式的存储介质中。The methods or steps described in connection with the embodiments disclosed herein may be implemented by hardware, software programs executed by a processor, or a combination of both. The software program can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

尽管通过参考附图并结合优选实施例的方式对本发明进行了详细描述，但本发明并不限于此。在不脱离本发明的精神和实质的前提下，本领域普通技术人员可以对本发明的实施例进行各种等效的修改或替换，而这些修改或替换都应在本发明的涵盖范围内。Although the present invention has been described in detail in conjunction with preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the present invention, and these modifications or replacements should all fall within the scope of the present invention.

Claims (18)

1. A method of cell handover, comprising:

receiving a Physical Cell Identity (PCI) of a target cell from User Equipment (UE);

acquiring location information, wherein the location information is used for representing the location of the UE or the location of a target base station controlling the target cell;

determining a target cell switched by the UE according to the PCI of the target cell and the position information;

and sending a switching request to a target cell switched by the UE to switch the UE.

2. The method of claim 1, wherein the obtaining location information comprises:

receiving the location information representing a location of the UE from the UE; or,

and acquiring position information for representing the position of the UE according to signals received by the serving base station of the UE and the adjacent base station of the serving base station from the UE.

3. The method of claim 2, wherein the determining the target cell for the UE handover according to the PCI of the target cell and the location information comprises:

determining a plurality of cells having the PCI;

and determining a cell with the minimum distance to the UE in the plurality of cells with the PCI as a target cell for the UE handover according to the position of the UE.

4. The method of claim 1, wherein the obtaining location information comprises:

receiving the location information representing the location of the target base station from the UE.

5. The method of claim 4, wherein the determining the target cell to which the UE is handed over according to the PCI of the target cell and the location information comprises:

determining a plurality of cells having the PCI;

and determining a target cell for the UE handover in the plurality of cells with the PCI according to the position of the target base station.

6. The method of claim 5, wherein the determining a target cell for handover of the UE among the plurality of cells with the PCI according to the location of the target base station comprises:

determining a first distance between the target base station and the serving base station according to the position of the target base station;

determining a plurality of second distances between a plurality of base stations controlling the plurality of cells and the serving base station;

and determining a cell corresponding to a second distance closest to the first distance as a target cell for the UE handover.

7. A method of cell handover, comprising:

determining a Physical Cell Identity (PCI) of a target cell and determining position information, wherein the position information is used for representing the position of User Equipment (UE) or controlling the position of a target base station of the target cell;

and sending the PCI and the position information to a service base station.

8. The method of claim 7, wherein determining location information indicative of a location of the UE comprises: determining coordinates of the UE according to a Global Positioning System (GPS) signal and/or a Positioning Reference Signal (PRS);

determining location information representing a location of a target base station controlling the target cell, comprising: determining coordinates of the target base station from GPS signals and/or PRS.

9. The method of claim 7, wherein the sending the PCI and the location information to a serving base station comprises: and sending the position information to the service base station through Radio Resource Control (RRC) signaling, a Physical Uplink Shared Channel (PUSCH) or a measurement report.

10. A base station, comprising:

a receiving unit, configured to receive a physical cell identity PCI of a target cell from a user equipment UE;

an obtaining unit, configured to obtain location information, where the location information is used to indicate a location of the UE or a location of a target base station that controls the target cell;

a determining unit, configured to determine a target cell to which the UE is handed over according to the PCI of the target cell and the location information;

and a sending unit, configured to send a handover request to a target cell to which the UE is handed over, so as to perform handover of the UE.

11. The base station according to claim 10, wherein the obtaining unit is specifically configured to receive, from the UE, the location information indicating the location of the UE through the receiving unit; or acquiring position information for indicating the position of the UE according to signals received from the UE by the base station and base stations adjacent to the base station.

12. The base station according to claim 11, wherein said determining unit is specifically configured to determine a plurality of cells having said PCI; and determining a cell with the minimum distance to the UE in the plurality of cells with the PCI as a target cell for the UE handover according to the position of the UE.

13. The base station of claim 10, wherein the obtaining unit is specifically configured to receive, from the UE through the receiving unit, the location information indicating the location of the target base station.

14. The base station according to claim 13, wherein said determining unit is specifically configured to determine a plurality of cells having said PCI; and determining a target cell for the UE handover in the plurality of cells with the PCI according to the position of the target base station.

15. The base station according to claim 14, wherein the determining unit is specifically configured to determine a first distance between the target base station and the serving base station according to the location of the target base station; determining a plurality of second distances between a plurality of base stations controlling the plurality of cells and the serving base station; and determining a cell corresponding to a second distance closest to the first distance as a target cell for the UE handover.

16. A user device, comprising:

a determining unit, configured to determine a physical cell identity PCI of a target cell, and determine location information, where the location information is used to indicate a location of the user equipment or a location of a target base station controlling the target cell;

a sending unit, configured to send the PCI and the location information to a serving base station.

17. The UE of claim 16, wherein the determining unit is specifically configured to determine coordinates of the UE according to GPS signals and/or Positioning Reference Signals (PRS); or determining coordinates of the target base station from GPS signals and/or PRSs.

18. The ue according to claim 16, wherein the transmitting unit is specifically configured to transmit the location information to the serving base station via radio resource control RRC signaling, physical uplink shared channel, PUSCH, or measurement report.

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