技术领域technical field
本发明涉及通信技术领域，尤其涉及一种信息传输方法、网络节点、用户设备及系统。The present invention relates to the technical field of communication, and in particular to an information transmission method, a network node, user equipment and a system.
背景技术Background technique
在长期演进（Long Term Evolution，LTE）系统中，控制区域用于传递用户设备（User Equipment，UE）的控制信息，其包括公共搜索空间和UE特定搜索空间。其中UE特定搜索空间承载特定UE的物理下行控制信道（PhysicalDownlink Control Channel，PDCCH），而公共搜索空间用于承载多个UE公共的PDCCH。例如，公共搜索空间中可以承载调度系统消息和寻呼消息的PDCCH、调度随机接入响应消息的PDCCH等。In a long term evolution (Long Term Evolution, LTE) system, the control region is used to transmit control information of a user equipment (User Equipment, UE), which includes a common search space and a UE-specific search space. The UE-specific search space carries a physical downlink control channel (Physical Downlink Control Channel, PDCCH) of a specific UE, and the common search space is used to carry a common PDCCH of multiple UEs. For example, a PDCCH for scheduling system messages and paging messages, a PDCCH for scheduling random access response messages, etc. may be carried in the common search space.
现有技术中UE随机接入的过程如下：UE向网络节点发送一个物理随机接入信道(Physical Random Access Channel，PRACH)的前导序列，网络节点接收到该前导序列后，通过公共搜索空间的PDCCH调度一个随机接入响应消息发送给该公共搜索空间中的UE。UE在公共搜索空间中检测到调度随机接入响应消息的PDCCH并获取随机接入响应消息，该随机接入响应消息中携带有一个临时扰码和其他定时配置信息。然后，UE向网络节点发送一个上行数据包，在该上行数据包中携带UE识别信息和获取到的临时扰码。这样，当网络节点接收到上行数据包并解析得到临时扰码和UE识别信息时，便完成了UE的随机接入。The process of UE random access in the prior art is as follows: UE sends a physical random access channel (Physical Random Access Channel, PRACH) preamble to the network node, and after receiving the preamble, the network node passes the PDCCH of the common search space Scheduling a random access response message to be sent to UEs in the common search space. The UE detects the PDCCH that schedules the random access response message in the common search space and acquires the random access response message. The random access response message carries a temporary scrambling code and other timing configuration information. Then, the UE sends an uplink data packet to the network node, and the uplink data packet carries UE identification information and the obtained temporary scrambling code. In this way, when the network node receives the uplink data packet and parses to obtain the temporary scrambling code and UE identification information, the random access of the UE is completed.
但是，由于LTE系统的不断改进，在增强长期演进（LTE-Advanced，LTE-A）等后续更高级的LTE版本中，引入了增强物理下行控制信道（EnhancedPDCCH，e-PDCCH)。因此，在一些载波中将由e-PDCCH搜索空间取代PDCCH搜索空间，还有一些载波中会同时存在e-PDCCH搜索空间和PDCCH搜索空间。同理，发起随机接入的UE中，部分UE可以支持e-PDCCH和PDCCH，还有部分UE仅支持PDCCH。However, due to the continuous improvement of the LTE system, an enhanced physical downlink control channel (Enhanced PDCCH, e-PDCCH) is introduced in subsequent and more advanced LTE versions such as Enhanced Long Term Evolution (LTE-Advanced, LTE-A). Therefore, the PDCCH search space will be replaced by the e-PDCCH search space in some carriers, and the e-PDCCH search space and the PDCCH search space will exist in some carriers at the same time. Similarly, among UEs that initiate random access, some UEs can support e-PDCCH and PDCCH, and some UEs only support PDCCH.
综上，发明人发现现有技术中至少存在如下问题：为了兼容不同能力的UE，网络节点接收到UE发送的PRACH消息后，不能按照UE的能力需求选择搜索空间，而只能在e-PDCCH搜索空间和PDCCH搜索空间中均发送调度随机接入响应消息的e-PDCCH或PDCCH，造成公共搜索空间的资源浪费，导致随机接入容量较低。To sum up, the inventors found that there are at least the following problems in the prior art: In order to be compatible with UEs with different capabilities, after receiving the PRACH message sent by the UE, the network node cannot select the search space according to the capability requirements of the UE, but only in the e-PDCCH Both the search space and the PDCCH search space transmit the e-PDCCH or PDCCH that schedules the random access response message, resulting in waste of resources in the common search space, resulting in low random access capacity.
发明内容Contents of the invention
本发明的实施例提供一种信息传输方法、网络节点、用户设备及系统，可以节约公共搜索空间资源，增大随机接入容量。Embodiments of the present invention provide an information transmission method, network node, user equipment and system, which can save public search space resources and increase random access capacity.
为达到上述目的，本发明的实施例采用如下技术方案：In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:
一种信息传输方法，包括：A method of information transmission, comprising:
接收用户设备UE发送的物理随机接入信道PRACH消息；receiving a physical random access channel PRACH message sent by the user equipment UE;
根据所述PRACH消息所携带的PRACH配置信息确定目标搜索空间，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息；Determine a target search space according to the PRACH configuration information carried in the PRACH message, where the target search space is one of at least two search spaces provided by a network node, and each search space corresponds to a group of PRACH configuration information;
通过所述目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息。Sending a downlink control message scheduling a random access response message to the UE through the target search space.
一种信息传输方法，包括：A method of information transmission, comprising:
用户设备UE接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间；The user equipment UE receives at least one set of physical random access channel PRACH configuration information issued by the network node, where one set of PRACH configuration information corresponds to one search space;
依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个；Sending a PRACH message to the network node according to the PRACH configuration information corresponding to the target search space, where the target search space is one of at least two search spaces provided by the network node;
通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。A downlink control message for scheduling a random access response message sent by the network node is received through the target search space.
一种网络节点，包括：A network node comprising:
接收单元，用于接收用户设备UE发送的物理随机接入信道PRACH消息；a receiving unit, configured to receive a physical random access channel PRACH message sent by the user equipment UE;
确定单元，用于根据所述接收单元接收到的PRACH消息所携带的PRACH配置信息确定目标搜索空间，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息；A determining unit, configured to determine a target search space according to the PRACH configuration information carried in the PRACH message received by the receiving unit, wherein the target search space is one of at least two search spaces provided by a network node, each search space Corresponding to a set of PRACH configuration information;
发送单元，用于通过所述确定单元确定的目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息。A sending unit, configured to send a downlink control message scheduling a random access response message to the UE through the target search space determined by the determining unit.
一种用户设备UE，包括：A user equipment UE, comprising:
第一接收单元，用于接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间；The first receiving unit is configured to receive at least one set of physical random access channel PRACH configuration information delivered by the network node, where one set of PRACH configuration information corresponds to one search space;
发送单元，用于依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个；A sending unit, configured to send a PRACH message to the network node according to the PRACH configuration information corresponding to the target search space, where the target search space is one of at least two search spaces provided by the network node;
第二接收单元，用于通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。The second receiving unit is configured to receive, through the target search space, a downlink control message for scheduling a random access response message sent by the network node.
一种信息传输系统，包括：网络节点以及UE；An information transmission system, including: a network node and a UE;
所述网络节点，用于配置每个搜索空间对应的PRACH配置信息并发送给UE；接收用户设备UE发送的物理随机接入信道PRACH消息；根据所述PRACH消息所携带的PRACH配置信息确定目标搜索空间，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息；通过所述目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息；The network node is configured to configure PRACH configuration information corresponding to each search space and send it to the UE; receive a physical random access channel PRACH message sent by the user equipment UE; determine a target search according to the PRACH configuration information carried in the PRACH message space, wherein the target search space is one of at least two search spaces provided by the network node, and each search space corresponds to a set of PRACH configuration information; sending a scheduling random access response message to the UE through the target search space downlink control message;
所述UE，用于接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间；依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息；通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。The UE is configured to receive at least one set of physical random access channel PRACH configuration information issued by a network node, where a set of PRACH configuration information corresponds to a search space; and send the PRACH configuration information to the network node according to the PRACH configuration information corresponding to the target search space PRACH message: receiving a downlink control message of a scheduling random access response message sent by the network node through the target search space.
本发明实施例提供的信息传输方法、网络节点、用户设备及系统，UE在发起随机接入时可以将目标搜索空间对应的PRACH配置信息携带在PRACH消息中，网络节点选择合适的搜索空间对UE下发下行控制消息，与现有技术中网络节点在每个公共搜索空间均发送调度随机接入响应消息的下行控制消息相比，可以按照UE的能力需求选择合适的公共搜索空间为UE发送下行控制消息，不用占用其他公共搜索空间的资源块，达到节约公共搜索空间资源的目的，节省的资源可以用于为其他UE提供随机接入，从而增大了随机接入容量。According to the information transmission method, network node, user equipment and system provided by the embodiments of the present invention, when the UE initiates random access, the PRACH configuration information corresponding to the target search space can be carried in the PRACH message, and the network node selects a suitable search space for the UE. Sending the downlink control message, compared with the downlink control message in which the network node sends a scheduling random access response message in each public search space in the prior art, can select the appropriate public search space to send the downlink message for the UE according to the capability requirements of the UE. The control message does not need to occupy resource blocks of other common search spaces, so as to save common search space resources, and the saved resources can be used to provide random access for other UEs, thereby increasing the random access capacity.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述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 in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为本发明实施例1中的一种信息传输方法流程图；FIG. 1 is a flowchart of an information transmission method in Embodiment 1 of the present invention;
图2为本发明实施例1中的另一种信息传输方法流程图；FIG. 2 is a flowchart of another information transmission method in Embodiment 1 of the present invention;
图3为本发明实施例2中的一种信息传输方法流程图；FIG. 3 is a flowchart of an information transmission method in Embodiment 2 of the present invention;
图4为本发明实施例3中的一种网络节点组成示意图；FIG. 4 is a schematic diagram of the composition of a network node in Embodiment 3 of the present invention;
图5为本发明实施例3中的另一种网络节点组成示意图；FIG. 5 is a schematic diagram of the composition of another network node in Embodiment 3 of the present invention;
图6为本发明实施例3中的一种UE组成示意图；FIG. 6 is a schematic diagram of the composition of a UE in Embodiment 3 of the present invention;
图7为本发明实施例3中的另一种UE组成示意图；FIG. 7 is a schematic diagram of another UE composition in Embodiment 3 of the present invention;
图8为本发明实施例3中的一种信息传输系统组成示意图。FIG. 8 is a schematic diagram of the composition of an information transmission system in Embodiment 3 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，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。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前提下所获得的所有其他实施例，都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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
实施例1Example 1
本发明实施例提供一种信息传输方法，可以应用于网络节点侧，如图1所示，该方法包括：An embodiment of the present invention provides an information transmission method, which can be applied to the network node side. As shown in FIG. 1, the method includes:
101、接收用户设备UE发送的物理随机接入信道PRACH消息。101. Receive a physical random access channel PRACH message sent by a user equipment UE.
其中，所述网络节点是网络侧为UE提供随机接入服务的设备，例如无线网络控制器（Radio Network Controller，RNC）、eNodeB等。Wherein, the network node is a device on the network side that provides a random access service for the UE, such as a radio network controller (Radio Network Controller, RNC), eNodeB, and the like.
102、根据所述PRACH消息所携带的PRACH配置信息确定目标搜索空间，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息。102. Determine a target search space according to the PRACH configuration information carried in the PRACH message, where the target search space is one of at least two search spaces provided by a network node, and each search space corresponds to a set of PRACH configuration information.
其中，为每个搜索空间配置一组PRACH配置信息，UE可以依据自身的能力选择一个搜索空间作为目标搜索空间。这样，当发起随机接入时，UE将目标搜索空间对应的PRACH配置信息携带在PRACH消息中。当网络节点接收到所述PRACH消息时，便可根据其中携带的PRACH配置信息确定目标搜索空间。网络节点可以提供至少两个搜索空间，所述目标搜索空间是网络节点提供的多个搜索空间中的一个，为了不用向至少两个搜索空间中的每个搜索空间都发送相同的下行控制消息，网络节点可以根据PRACH消息所携带的PRACH配置信息确定UE已选定的目标搜索空间。Wherein, a set of PRACH configuration information is configured for each search space, and the UE may select a search space as a target search space according to its own capability. In this way, when initiating random access, the UE carries the PRACH configuration information corresponding to the target search space in the PRACH message. When the network node receives the PRACH message, it can determine the target search space according to the PRACH configuration information carried therein. The network node may provide at least two search spaces, the target search space is one of the multiple search spaces provided by the network node, in order not to send the same downlink control message to each of the at least two search spaces, The network node can determine the target search space selected by the UE according to the PRACH configuration information carried in the PRACH message.
在本实施例中，可以预先在网络节点侧配置所述PRACH配置信息并发送给UE，预先配置的所述PRACH配置信息可以标识不同的公共搜索空间，每个公共搜索空间对应有一组PRACH配置信息。In this embodiment, the PRACH configuration information may be pre-configured on the network node side and sent to the UE. The pre-configured PRACH configuration information may identify different common search spaces, and each common search space corresponds to a group of PRACH configuration information .
103、通过所述目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息。103. Send a downlink control message scheduling a random access response message to the UE through the target search space.
其中，所述搜索空间可以为：PDCCH搜索空间，或e-PDCCH搜索空间等。所述下行控制消息用于调度随机接入响应消息，例如，对于PDCCH搜索空间，所述下行控制消息为PDCCH消息；对于e-PDCCH搜索空间，所述下行控制消息为e-PDCCH消息。Wherein, the search space may be: a PDCCH search space, or an e-PDCCH search space, and the like. The downlink control message is used to schedule a random access response message, for example, for the PDCCH search space, the downlink control message is a PDCCH message; for the e-PDCCH search space, the downlink control message is an e-PDCCH message.
需要说明的是，本说明书中所说的搜索空间是指可由多个UE共用的公共搜索空间，例如e-PDCCH的公共搜索空间和PDCCH的公共搜索空间等。当然，随着LTE系统的发展，还可以引入其他公共搜索空间，在本发明实施例中亦可适用。It should be noted that the search space mentioned in this specification refers to a common search space that can be shared by multiple UEs, such as a common search space of e-PDCCH and a common search space of PDCCH. Of course, with the development of the LTE system, other public search spaces may also be introduced, which are also applicable in the embodiments of the present invention.
图1提供的信息发送方法，UE将目标搜索空间对应的PRACH配置信息携带在PRACH消息中，网络节点选择合适的搜索空间对UE下发下行控制消息，与现有技术中网络节点在每个公共搜索空间均发送调度随机接入响应消息的下行控制消息相比，可以按照UE的能力需求选择合适的公共搜索空间为UE发送下行控制消息，不用占用其他公共搜索空间的资源块，达到节约公共搜索空间资源的目的，节省的资源可以用于为其他UE提供随机接入，从而增大了随机接入容量。In the information sending method provided in Figure 1, the UE carries the PRACH configuration information corresponding to the target search space in the PRACH message, and the network node selects an appropriate search space to send a downlink control message to the UE. Compared with sending downlink control messages for scheduling random access response messages in all search spaces, an appropriate common search space can be selected to send downlink control messages for the UE according to the capability requirements of the UE, without occupying resource blocks of other common search spaces, so as to save public search space. For the purpose of space resources, the saved resources can be used to provide random access for other UEs, thereby increasing the random access capacity.
本发明实施例还提供一种信息传输方法，可以应用于UE侧，如图2所示，该方法包括：The embodiment of the present invention also provides an information transmission method, which can be applied to the UE side. As shown in FIG. 2, the method includes:
201、用户设备UE接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息。201. The user equipment UE receives at least one set of physical random access channel PRACH configuration information delivered by the network node, wherein the target search space is one of at least two search spaces provided by the network node, and each search space corresponds to a set of PRACH configuration information.
其中，UE可以接收网络节点下发的每个搜索空间对应的PRACH配置信息，或者，尽管网络节点通过广播等形式下发每个搜索空间对应的PRACH配置信息，但是UE可以仅接收UE所关心的一组PRACH配置信息。例如，若UE仅支持PDCCH搜索空间，则仅接收网络节点下发的PDCCH搜索空间对应的PRACH配置信息；若UE支持PDCCH和e-PDCCH搜索空间，则接收以上两个搜索空间对应的两组PRACH配置信息。The UE may receive the PRACH configuration information corresponding to each search space sent by the network node, or, although the network node sends the PRACH configuration information corresponding to each search space through broadcasting, etc., the UE may only receive the PRACH configuration information that the UE cares about. A set of PRACH configuration information. For example, if the UE only supports the PDCCH search space, it only receives the PRACH configuration information corresponding to the PDCCH search space issued by the network node; if the UE supports the PDCCH and e-PDCCH search spaces, it receives two sets of PRACH corresponding to the above two search spaces configuration information.
202、依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个。202. Send a PRACH message to the network node according to the PRACH configuration information corresponding to the target search space, where the target search space is one of the at least two search spaces provided by the network node.
其中，UE可以通过步骤201接收到至少两组PRACH配置信息后，先确定目标搜索空间再发送PRACH消息。具体的，UE从UE支持的至少两个搜索空间中随机选择或按照预定的优先顺序选择一个搜索空间作为目标搜索空间，将选定的目标搜索空间对应的PRACH配置信息通过PRACH消息发送给网络节点。Wherein, after receiving at least two sets of PRACH configuration information in step 201, the UE first determines the target search space and then sends the PRACH message. Specifically, the UE randomly selects a search space from at least two search spaces supported by the UE or selects a search space according to a predetermined priority order as the target search space, and sends the PRACH configuration information corresponding to the selected target search space to the network node through a PRACH message .
或者，UE可以通过步骤201接收到至少两组PRACH配置信息后，先发送PRACH消息再根据已发送的PRACH消息确定目标搜索空间。具体的，UE从至少两组PRACH配置信息中随机选择或按照预定的优先顺序选择一组PRACH配置信息通过PRACH消息发送给网络节点，然后根据已发送的PRACH配置信息确定其对应的目标搜索空间，通过该目标搜索空间接收网络节点下发的下行控制消息。Alternatively, after receiving at least two sets of PRACH configuration information in step 201, the UE first sends a PRACH message and then determines the target search space according to the sent PRACH message. Specifically, the UE randomly selects a set of PRACH configuration information from at least two sets of PRACH configuration information or selects a set of PRACH configuration information according to a predetermined priority order and sends it to the network node through a PRACH message, and then determines its corresponding target search space according to the sent PRACH configuration information, The downlink control message sent by the network node is received through the target search space.
或者，UE仅支持一个搜索空间，该唯一支持的搜索空间即为默认的目标搜索空间，可以通过步骤201接收到网络节点下发的唯一一组PRACH配置信息，则可以直接根据接收到的PRACH配置信息发送PRACH消息，然后通过该目标搜索空间接收网络节点下发的下行控制消息。Alternatively, the UE only supports one search space, and the only supported search space is the default target search space. The unique set of PRACH configuration information sent by the network node can be received through step 201, and the received PRACH configuration information can be directly The configuration information sends a PRACH message, and then receives a downlink control message delivered by a network node through the target search space.
203、通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。203. Receive a downlink control message for scheduling a random access response message sent by the network node through the target search space.
其中，网络节点在接收到UE通过步骤202发送的PRACH消息后，可以根据所述PRACH消息所携带的PRACH配置信息确定所述目标搜索空间，并通过目标搜索空间向UE下发下行控制消息。UE通过步骤202发送PRACH消息的同时也确定了目标搜索空间，因此可以只在目标搜索空间中检测下行控制消息。Wherein, after receiving the PRACH message sent by the UE in step 202, the network node may determine the target search space according to the PRACH configuration information carried in the PRACH message, and deliver a downlink control message to the UE through the target search space. The UE also determines the target search space while sending the PRACH message in step 202, so the downlink control message can be detected only in the target search space.
图2提供的信息传输方法，UE在发起随机接入时可以将目标搜索空间对应的PRACH配置信息携带在PRACH消息中，使得网络节点通过目标搜索空间对UE下发下行控制消息，与现有技术中UE需要同时监听多个搜索空间的方法相比，UE选定目标搜索空间并通过目标搜索空间接收下行控制消息，不用同时监听多个搜索空间，达到节约UE处理资源的目的。In the information transmission method provided in Figure 2, when the UE initiates random access, the PRACH configuration information corresponding to the target search space can be carried in the PRACH message, so that the network node sends a downlink control message to the UE through the target search space, which is different from the existing technology Compared with the method in which the UE needs to monitor multiple search spaces at the same time, the UE selects the target search space and receives the downlink control message through the target search space, and does not need to monitor multiple search spaces at the same time, so as to save UE processing resources.
实施例2Example 2
本发明实施例提供一种信息传输方法，如图3所示，包括：An embodiment of the present invention provides an information transmission method, as shown in FIG. 3 , including:
301、网络节点配置每个搜索空间对应的PRACH配置信息并发送给UE。301. The network node configures PRACH configuration information corresponding to each search space and sends it to the UE.
其中，所述PRACH配置信息具体为以下至少一种：PRACH配置索引、频率偏移、前导序列信息、资源分配信息、调制编码信息。Wherein, the PRACH configuration information is specifically at least one of the following: PRACH configuration index, frequency offset, preamble information, resource allocation information, modulation and coding information.
302、用户设备UE接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间。302. The user equipment UE receives at least one set of physical random access channel PRACH configuration information delivered by the network node, where one set of PRACH configuration information corresponds to one search space.
其中，在网络节点上预先为每个搜索空间配置一组PRACH配置信息，不仅要存储在网络节点上，还要下发给UE。当然，网络节点并不知道各个UE所支持的搜索空间是什么，因此可以将每个搜索空间对于的PRACH配置信息均发送给UE。所述PRACH配置信息可以通过以下任一种形式发送给UE：广播信道、系统消息、无线资源控制RRC信令、参考信号。例如，PRACH配置信息可以显式地携带在广播信道消息中。或者，PRACH配置信息也可以是隐式形式，例如每个搜索空间对应于一种信道状态参考信号，通过解析信道状态参考信号可以确定对应的搜索空间。Wherein, a set of PRACH configuration information is pre-configured for each search space on the network node, not only to be stored on the network node, but also to be delivered to the UE. Of course, the network node does not know what search spaces each UE supports, so it can send the PRACH configuration information for each search space pair to the UE. The PRACH configuration information may be sent to the UE in any of the following forms: broadcast channel, system message, radio resource control RRC signaling, and reference signal. For example, the PRACH configuration information can be explicitly carried in the broadcast channel message. Alternatively, the PRACH configuration information may also be in an implicit form, for example, each search space corresponds to a channel state reference signal, and the corresponding search space can be determined by analyzing the channel state reference signal.
303、UE目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个。对应的，网络节点接收用户设备UE发送的物理随机接入信道PRACH消息。303. The PRACH configuration information corresponding to the target search space of the UE sends a PRACH message to the network node, where the target search space is one of at least two search spaces provided by the network node. Correspondingly, the network node receives the physical random access channel PRACH message sent by the user equipment UE.
具体的，PRACH配置信息的形式和依据PRACH配置信息发送PRACH消息的方法阐述如下：Specifically, the form of the PRACH configuration information and the method for sending the PRACH message according to the PRACH configuration information are described as follows:
一个配置索引可以对应PRACH的一种前导序列格式和一套时域PRACH资源。其中，通过前导序列格式配置PRACH消息的时间长度，循环前缀长度等，一个搜索空间对应一种前导序列格式。时域PRACH资源可以配置UE在不同无线帧的不同子帧中发送PRACH，对应的是不同搜索空间。A configuration index may correspond to a preamble format of the PRACH and a set of time-domain PRACH resources. Wherein, the time length of the PRACH message, the length of the cyclic prefix, etc. of the PRACH message are configured through the preamble format, and one search space corresponds to one preamble format. The time-domain PRACH resource can configure the UE to send the PRACH in different subframes of different radio frames, corresponding to different search spaces.
频率偏移对应PRACH频域资源位置，不同的频域资源位置对应不同的搜索空间。例如，系统带宽为100个资源块，而网络节点配置的某一搜索空间的PRACH消息的频率资源是系统带宽中的某6个连续的资源块。The frequency offset corresponds to the PRACH frequency domain resource position, and different frequency domain resource positions correspond to different search spaces. For example, the system bandwidth is 100 resource blocks, and the frequency resource of the PRACH message in a certain search space configured by the network node is a certain 6 consecutive resource blocks in the system bandwidth.
前导序列信息用于在网络节点为每个搜索空间指定前导序列后发送给UE，UE在发起随机接入时，将目标搜索空间对应的前导序列携带在PRACH消息中。The preamble information is used to send the preamble to the UE after the network node specifies the preamble for each search space. When the UE initiates random access, it carries the preamble corresponding to the target search space in the PRACH message.
资源分配信息和调制编码信息可以用于所述PRACH消息是上行数据包的情况。即当UE采用上行数据包的形式发起随机接入时，设定该上行数据包所占用的资源块，或编码类型。占用的资源块不同或编码类型不同，均可代表不同的搜索空间。Resource allocation information and modulation and coding information can be used in the case that the PRACH message is an uplink data packet. That is, when the UE initiates random access in the form of an uplink data packet, the resource block or coding type occupied by the uplink data packet is set. Different resource blocks occupied or different coding types can represent different search spaces.
304、网络节点根据所述PRACH消息所携带的PRACH配置信息确定目标搜索空间。304. The network node determines a target search space according to the PRACH configuration information carried in the PRACH message.
具体的，可以将所述PRACH消息所携带的PRACH配置信息与所述网络节点上已配置的每个搜索空间对应的PRACH配置信息进行匹配。将匹配成功的搜索搜索空间确定为目标搜索空间。Specifically, the PRACH configuration information carried in the PRACH message may be matched with the PRACH configuration information corresponding to each search space configured on the network node. Determine the successfully matched search space as the target search space.
需要说明的是，目标搜索空间是指UE可以支持该搜索空间，可以在该搜索空间中检测网络节点发送的下行控制信息。若UE仅支持PDCCH搜索空间，PDCCH搜索空间就是目标搜索空间。或者，若UE同时支持PDCCH搜索空间和e-PDCCH搜索空间，则可以在接收到以上两个搜索空间对应的PRACH配置信息后，从两个搜索空间中选择一个作为目标搜索空间，依据选择的目标搜索空间对应的PRACH配置信息发送PRACH消息。It should be noted that the target search space means that the UE can support the search space, and can detect the downlink control information sent by the network node in the search space. If the UE only supports the PDCCH search space, the PDCCH search space is the target search space. Alternatively, if the UE supports the PDCCH search space and the e-PDCCH search space at the same time, after receiving the PRACH configuration information corresponding to the above two search spaces, one of the two search spaces can be selected as the target search space. The PRACH configuration information corresponding to the search space sends a PRACH message.
305、网络节点通过所述目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息。相应的，UE通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。305. The network node sends a downlink control message scheduling a random access response message to the UE through the target search space. Correspondingly, the UE receives a downlink control message for scheduling a random access response message sent by the network node through the target search space.
其中，网络节点可以确定目标搜索空间，仅通过该搜索空间向UE发送下行控制消息，即向UE发送调度随机接入响应消息的e-PDCCH或PDCCH。由于网络节点仅需要用一个搜索空间向该UE发生下行控制消息，不会多余的占用其他搜索空间的时频资源，与此同时便可以通过其他搜索空间向其他UE发送下行控制消息，从而可以提高随机接入的效率，增大随机接入容量。Wherein, the network node may determine the target search space, and only send the downlink control message to the UE through the search space, that is, send the e-PDCCH or PDCCH for scheduling the random access response message to the UE. Since the network node only needs to use one search space to send a downlink control message to the UE, it will not occupy the time-frequency resources of other search spaces redundantly, and at the same time, it can send downlink control messages to other UEs through other search spaces, thereby improving The efficiency of random access increases the capacity of random access.
另外，在随机接入响应消息中包含网络节点为UE分配的临时扰码和一些其他定时配置信息。UE根据所述调度随机接入响应消息的下行控制消息获取随机接入响应消息。所述临时扰码用于让UE依据该临时扰码向网络节点回复一个包含UE识别信息的上行业务数据包。In addition, the temporary scrambling code allocated by the network node for the UE and some other timing configuration information are included in the random access response message. The UE obtains the random access response message according to the downlink control message of the scheduling random access response message. The temporary scrambling code is used to allow the UE to reply an uplink service data packet containing UE identification information to the network node according to the temporary scrambling code.
306、UE向所述网络节点发送一个上行业务数据包，在所述上行业务数据包中携带接收到的临时扰码和UE识别信息。306. The UE sends an uplink service data packet to the network node, where the received temporary scrambling code and UE identification information are carried in the uplink service data packet.
其中，网络节点从接收的上行业务数据包中解析得到所述UE对应的临时扰码和UE识别信息。该临时扰码是步骤305中由网络节点下发给UE的，因此网络节点可以根据该临时扰码确定该UE是发起随机接入的UE，获取所述UE识别信息以便后续通信使用，至此随机接入成功。Wherein, the network node parses the received uplink service data packet to obtain the temporary scrambling code and UE identification information corresponding to the UE. The temporary scrambling code is issued by the network node to the UE in step 305, so the network node can determine that the UE is a UE that initiates random access according to the temporary scrambling code, and obtain the UE identification information for subsequent communication. Access is successful.
307、随机接入成功。307. The random access is successful.
随机接入成功后，网络节点可以通过所述目标搜索空间向UE下发用临时扰码加扰的下行控制消息给UE，建立无线资源控制链路，进行后续通信。After the random access is successful, the network node can send a downlink control message scrambled with a temporary scrambling code to the UE through the target search space, establish a radio resource control link, and perform subsequent communication.
在本发明实施例的另一种应用场景中，所述PRACH消息可以是一个上行数据包。当UE或网络节点发起随机接入时，UE可以省去向网络节点发送随机接入前导序列的操作，直接向网络节点发送一个上行数据包，在该上行数据包中携带PRACH配置信息。这样，网络节点可以从上行数据包中解析得到PRACH配置信息，确定目标搜索空间，并通过目标搜索空间下发下行控制消息。In another application scenario of the embodiment of the present invention, the PRACH message may be an uplink data packet. When the UE or the network node initiates random access, the UE can omit the operation of sending the random access preamble to the network node, and directly send an uplink data packet to the network node, and the uplink data packet carries PRACH configuration information. In this way, the network node can parse the uplink data packet to obtain the PRACH configuration information, determine the target search space, and issue a downlink control message through the target search space.
需要说明的是，本发明实施例中部分步骤的具体描述可以参考实施例1中对应内容，本发明实施例这里将不再一一赘述。It should be noted that for the specific description of some steps in the embodiment of the present invention, reference may be made to the corresponding content in Embodiment 1, and details will not be repeated here in the embodiment of the present invention.
本发明实施例提供的信息传输方法，UE在发起随机接入时可以将目标搜索空间对应的PRACH配置信息携带在PRACH消息中，网络节点选择合适的搜索空间对UE下发下行控制消息，与现有技术中网络节点在每个公共搜索空间均发送调度随机接入响应消息的下行控制消息相比，可以按照UE的能力需求选择合适的公共搜索空间为UE发送下行控制消息，不用占用其他公共搜索空间的资源块，达到节约公共搜索空间资源的目的，节省的资源可以用于为其他UE提供随机接入，从而增大了随机接入容量。In the information transmission method provided by the embodiment of the present invention, when the UE initiates random access, the PRACH configuration information corresponding to the target search space can be carried in the PRACH message, and the network node selects a suitable search space to send the downlink control message to the UE, which is different from the current Compared with the prior art in which the network node sends downlink control messages for scheduling random access response messages in each public search space, it is possible to select an appropriate public search space to send downlink control messages for the UE according to the capability requirements of the UE, without occupying other public search spaces. The resource blocks in the space can achieve the purpose of saving common search space resources, and the saved resources can be used to provide random access for other UEs, thereby increasing the random access capacity.
并且，可以通过UE发送的上行数据包确定UE所述的搜索空间，简化了随机接入步骤，可以通过一个上行数据包完成UE的随机接入，提高了随机接入的效率。Moreover, the search space described by the UE can be determined through the uplink data packet sent by the UE, which simplifies the random access steps, and the random access of the UE can be completed through one uplink data packet, thereby improving the efficiency of random access.
实施例3Example 3
本发明实施例提供一种网络节点，如图4所示，包括：接收单元41、确定单元42、发送单元43。An embodiment of the present invention provides a network node, as shown in FIG. 4 , including: a receiving unit 41 , a determining unit 42 , and a sending unit 43 .
接收单元41，用于接收用户设备UE发送的物理随机接入信道PRACH消息。The receiving unit 41 is configured to receive a physical random access channel PRACH message sent by a user equipment UE.
确定单元42，用于根据所述接收单元41接收到的PRACH消息所携带的PRACH配置信息确定目标搜索空间。The determining unit 42 is configured to determine the target search space according to the PRACH configuration information carried in the PRACH message received by the receiving unit 41 .
其中，所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息。所述PRACH配置信息具体为以下至少一种：PRACH配置索引、频率偏移、前导序列信息、资源分配信息、调制编码信息。Wherein, the target search space is one of at least two search spaces provided by the network node, and each search space corresponds to a group of PRACH configuration information. The PRACH configuration information is specifically at least one of the following: PRACH configuration index, frequency offset, preamble information, resource allocation information, modulation and coding information.
发送单元43，用于通过所述确定单元42确定的目标搜索空间向所述UE发送调度随机接入响应消息的下行控制消息。The sending unit 43 is configured to send a downlink control message scheduling a random access response message to the UE through the target search space determined by the determining unit 42 .
进一步的，如图5所示，该网络节点还可以包括：配置单元44。Further, as shown in FIG. 5 , the network node may further include: a configuration unit 44 .
配置单元44，用于在所述接收单元41接收所述UE发送的PRACH消息之前，配置每个搜索空间对应的PRACH配置信息并发送给UE。The configuration unit 44 is configured to configure PRACH configuration information corresponding to each search space and send it to the UE before the receiving unit 41 receives the PRACH message sent by the UE.
其中，所述PRACH配置信息通过以下任一种形式发送给UE：广播信道、系统消息、无线资源控制RRC信令、参考信号。Wherein, the PRACH configuration information is sent to the UE in any of the following forms: broadcast channel, system message, radio resource control RRC signaling, and reference signal.
进一步的，所述确定单元具体可以用于：将所述PRACH消息所携带的PRACH配置信息与所述网络节点上已配置的每个搜索空间对应的PRACH配置信息进行匹配；将匹配成功的搜索搜索空间确定为目标搜索空间。Further, the determining unit may be specifically configured to: match the PRACH configuration information carried in the PRACH message with the PRACH configuration information corresponding to each search space configured on the network node; space determined as the target search space.
其中，所述搜索空间可以为：物理下行控制信道PDCCH搜索空间，或增强物理下行控制信道e-PDCCH搜索空间，或其他公共搜索空间。相应的，所述调度随机接入响应消息的下行控制消息为：PDCCH消息，或e-PDCCH消息，或其他公共搜索空间对应的下行控制消息。Wherein, the search space may be: a physical downlink control channel PDCCH search space, or an enhanced physical downlink control channel e-PDCCH search space, or other common search spaces. Correspondingly, the downlink control message of the scheduling random access response message is: a PDCCH message, or an e-PDCCH message, or a downlink control message corresponding to other common search spaces.
在本发明的另一种应用场景中，所述PRACH消息不仅可以为PRACH前导序列，还可以是一个上行数据包。省去UE向网络节点发送PRACH前导序列的操作，直接向网络节点发送一个上行数据包，通过该上行数据包携带UE的PRACH配置信息等信息。In another application scenario of the present invention, the PRACH message can be not only a PRACH preamble sequence, but also an uplink data packet. The operation of sending the PRACH preamble sequence from the UE to the network node is omitted, and an uplink data packet is directly sent to the network node, and the uplink data packet carries information such as PRACH configuration information of the UE.
本发明实施例提供一种UE，如图6所示，包括：第一接收单元51、发送单元52、第二接收单元53。An embodiment of the present invention provides a UE, as shown in FIG. 6 , including: a first receiving unit 51 , a sending unit 52 , and a second receiving unit 53 .
第一接收单元51，用于接收网络节点下发的至少一组物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间。The first receiving unit 51 is configured to receive at least one set of physical random access channel PRACH configuration information delivered by the network node, where one set of PRACH configuration information corresponds to one search space.
发送单元52，用于依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个。The sending unit 52 is configured to send a PRACH message to the network node according to the PRACH configuration information corresponding to the target search space, where the target search space is one of at least two search spaces provided by the network node.
第二接收单元53，用于在所述发送单元52依据目标搜索空间对应的PRACH配置信息向所述网络节点发送PRACH消息之后，通过所述目标搜索空间接收所述网络节点发送的调度随机接入响应消息的下行控制消息。The second receiving unit 53 is configured to receive the scheduled random access sent by the network node through the target search space after the sending unit 52 sends the PRACH message to the network node according to the PRACH configuration information corresponding to the target search space The downlink control message of the response message.
进一步的，在本发明实施例的一种应用场景中，所述发送单元52可以包括：第一选择模块521、第一发送模块522。Further, in an application scenario of the embodiment of the present invention, the sending unit 52 may include: a first selection module 521 and a first sending module 522 .
第一选择模块521，用于从UE支持的至少两个搜索空间中随机选择或按照预定的优先顺序选择一个搜索空间作为目标搜索空间。The first selection module 521 is configured to randomly select a search space from at least two search spaces supported by the UE or select a search space according to a predetermined priority order as a target search space.
第一发送模块522，用于将所述第一选择模块521选择的目标搜索空间对应的PRACH配置信息通过PRACH消息发送给所述网络节点。The first sending module 522 is configured to send the PRACH configuration information corresponding to the target search space selected by the first selecting module 521 to the network node through a PRACH message.
如图7所示，在本发明实施例的另一种应用场景中，所述发送单元52可以包括：第二发送模块523、第二选择模块524。As shown in FIG. 7 , in another application scenario of the embodiment of the present invention, the sending unit 52 may include: a second sending module 523 and a second selecting module 524 .
第二发送模块523，用于从接收到的至少一组PRACH配置信息中随机选择或按照预定的优先顺序选择一组PRACH配置信息通过PRACH消息发送给所述网络节点。The second sending module 523 is configured to randomly select a set of PRACH configuration information from at least one set of received PRACH configuration information or select a set of PRACH configuration information according to a predetermined priority order and send it to the network node through a PRACH message.
第二选择模块524，用于根据所述第二发送模块523已发送的PRACH配置信息确定对应的目标搜索空间。The second selecting module 524 is configured to determine a corresponding target search space according to the PRACH configuration information sent by the second sending module 523 .
本发明实施例还提供一种信息传输系统，如图8所示，包括：网络节点61以及用户设备UE62。The embodiment of the present invention also provides an information transmission system, as shown in FIG. 8 , including: a network node 61 and a user equipment UE62.
所述网络节点61，用于配置每个搜索空间对应的PRACH配置信息并发送给UE；接收用户设备UE62发送的物理随机接入信道PRACH消息；根据所述PRACH消息所携带的PRACH配置信息确定目标搜索空间，其中所述目标搜索空间是网络节点提供的至少两个搜索空间中的一个，每个搜索空间对应一组PRACH配置信息；通过所述目标搜索空间向所述UE62发送调度随机接入响应消息的下行控制消息。The network node 61 is configured to configure PRACH configuration information corresponding to each search space and send it to the UE; receive a physical random access channel PRACH message sent by the user equipment UE62; determine a target according to the PRACH configuration information carried in the PRACH message A search space, wherein the target search space is one of at least two search spaces provided by a network node, and each search space corresponds to a set of PRACH configuration information; sending a scheduling random access response to the UE62 through the target search space The downlink control message of the message.
所述UE62，用于接收网络节点61下发的物理随机接入信道PRACH配置信息，其中一组PRACH配置信息对应一个搜索空间；依据目标搜索空间对应的PRACH配置信息向所述网络节点61发送PRACH消息，其中所述目标搜索空间是网络节点提供的至少两个所述搜索空间中的一个；通过所述目标搜索空间接收所述网络节点61发送的调度随机接入响应消息的下行控制消息。The UE62 is configured to receive physical random access channel PRACH configuration information issued by the network node 61, wherein a set of PRACH configuration information corresponds to a search space; send the PRACH to the network node 61 according to the PRACH configuration information corresponding to the target search space message, wherein the target search space is one of the at least two search spaces provided by the network node; the downlink control message for scheduling a random access response message sent by the network node 61 is received through the target search space.
需要说明的是，本发明实施例中部分功能模块的具体描述可以参考实施例1和实施例2中对应内容，本发明实施例这里将不再一一赘述。It should be noted that for specific descriptions of some functional modules in the embodiments of the present invention, reference may be made to the corresponding content in Embodiment 1 and Embodiment 2, and the embodiments of the present invention will not be repeated here.
本发明实施例提供的网络节点、UE及信息传输系统，UE在发起随机接入时可以将目标搜索空间对应的PRACH配置信息携带在PRACH消息中，网络节点选择合适的搜索空间对UE下发下行控制消息，与现有技术中网络节点在每个公共搜索空间均发送调度随机接入响应消息的下行控制消息相比，可以按照UE的能力需求选择合适的公共搜索空间为UE发送下行控制消息，不用占用其他公共搜索空间的资源块，达到节约公共搜索空间资源的目的，节省的资源可以用于为其他UE提供随机接入，从而增大了随机接入容量。In the network node, UE and information transmission system provided by the embodiments of the present invention, the UE can carry the PRACH configuration information corresponding to the target search space in the PRACH message when the UE initiates random access, and the network node selects an appropriate search space to deliver downlink to the UE. The control message, compared with the downlink control message in which the network node sends a scheduling random access response message in each common search space in the prior art, can select an appropriate common search space to send the downlink control message for the UE according to the capability requirements of the UE. The purpose of saving common search space resources is achieved without occupying resource blocks of other common search spaces, and the saved resources can be used to provide random access for other UEs, thereby increasing random access capacity.
并且，可以通过UE发送的上行数据包确定UE所述的搜索空间，简化了随机接入步骤，可以通过一个上行数据包完成UE的随机接入，提高了随机接入的效率。Moreover, the search space described by the UE can be determined through the uplink data packet sent by the UE, which simplifies the random access steps, and the random access of the UE can be completed through one uplink data packet, thereby improving the efficiency of random access.
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。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可读取的存储介质中，如计算机的软盘，硬盘或光盘等，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的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware, and of course also by hardware, but in many cases the former is a better embodiment . Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , a hard disk or an optical disk, etc., including several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.
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，可轻易想到变化或替换，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所述权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
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