CN102209391A - Random access resource configuration method and device - Google Patents
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Abstract
本发明实施例公开一种随机接入资源的分配方法及装置,涉及通信技术领域,减小了组内MTC设备在随机接入网络时发生冲突的概率。包括:接收MME下发的包括有目标组标识和机器类型通讯MTC终端数目参数的第一消息,所述目标组标识用于标识目标组,所述MTC终端数目参数用于表示本小区内属于所述目标组的MTC终端数目;根据所述第一消息中的MTC终端数目参数调整随机接入资源;向本小区内属于所述目标组标识的所有MTC终端下发第二消息,所述第二消息用于指示所述MTC终端从调整后的随机接入资源中进行选择并接入。本发明实施例主要用于通信技术领域。
The embodiment of the present invention discloses a method and device for allocating random access resources, relates to the field of communication technology, and reduces the probability of conflicts between MTC devices in a group when randomly accessing a network. Including: receiving the first message sent by the MME that includes a target group identifier and a parameter of the number of MTC terminals for machine type communication, the target group identifier is used to identify the target group, and the parameter of the number of MTC terminals in the cell is used to indicate the the number of MTC terminals in the target group; adjust random access resources according to the number of MTC terminals in the first message; send a second message to all MTC terminals belonging to the target group identifier in the cell, and the second The message is used to instruct the MTC terminal to select and access from the adjusted random access resources. The embodiments of the present invention are mainly used in the technical field of communication.
Description
技术领域technical field
本发明涉及通信技术领域,尤其涉及一种随机接入资源的分配方法及装置。The present invention relates to the field of communication technologies, in particular to a method and device for allocating random access resources.
背景技术Background technique
MTC(Machine Type Communications,机器类型通讯)应用指的是一个或者多个网元之间在不需要人为参与的情况下进行的网络通讯,如交通控制与管理、工厂监控、远程抄表等应用。在上述MTC应用中,当多个MTC设备同属于一个签约用户时,所有这些MTC设备就构成这个签约用户的组。MTC (Machine Type Communications) applications refer to the network communication between one or more network elements without human participation, such as traffic control and management, factory monitoring, remote meter reading and other applications. In the above MTC application, when multiple MTC devices belong to one subscriber, all these MTC devices constitute a group of this subscriber.
现有技术实现上述基于组的寻呼过程如下:MME(mobility managemententity,移动管理实体)发送寻呼消息给无线接入网节点,无线接入网点将其分配的随机接入资源通过系统广播消息广播给本小区内的所有终端设备,然后,终端设备会从接收到的广播消息中选择一个随机接入资源向网络发起接入请求。The prior art realizes the above-mentioned group-based paging process as follows: MME (mobility management entity, mobile management entity) sends a paging message to a wireless access network node, and the wireless access network node broadcasts the random access resource allocated by it through a system broadcast message All terminal devices in the cell, and then, the terminal device will select a random access resource from the received broadcast message to initiate an access request to the network.
然而,发明人发现在上述基于组的寻呼过程中,MME寻呼上述无线接入网点覆盖的所有MTC设备时,会导致大量MTC设备为了响应寻呼进行随机接入网络,此时由于随机接入资源有限,就会导致接入冲突。However, the inventors found that in the above-mentioned group-based paging process, when the MME pages all the MTC devices covered by the above-mentioned wireless access network point, a large number of MTC devices will randomly access the network in response to the paging. If access resources are limited, access conflicts will result.
发明内容Contents of the invention
本发明的实施例提供一种随机接入资源的分配方法及装置,以减小MTC设备在随机接入网络时发生冲突的概率。Embodiments of the present invention provide a method and device for allocating random access resources, so as to reduce the probability of collisions when MTC devices randomly access a network.
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:
一种随机接入资源的分配方法,包括:A method for allocating random access resources, comprising:
接收MME下发的包括有目标组标识和MTC终端数目参数的第一消息,所述目标组标识用于标识目标组,所述MTC终端数目参数用于表示本小区内属于所述目标组的MTC终端数目;Receiving a first message sent by the MME that includes a target group identifier and a parameter of the number of MTC terminals, the target group identifier is used to identify the target group, and the parameter of the number of MTC terminals is used to indicate the MTCs belonging to the target group in the cell number of terminals;
根据所述第一消息中的MTC终端数目参数调整随机接入资源;adjusting random access resources according to the MTC terminal number parameter in the first message;
向本小区内属于所述目标组的所有MTC终端下发第二消息,所述第二消息用于指示所述MTC终端从调整后的随机接入资源中进行选择并接入。Sending a second message to all MTC terminals belonging to the target group in the cell, where the second message is used to instruct the MTC terminal to select and access from the adjusted random access resources.
一种随机接入资源的分配装置,包括:A device for allocating random access resources, comprising:
接收单元,用于接收MME下发的包括有目标组标识和MTC终端数目参数的第一消息,所述目标组标识用于标识目标组,所述MTC终端数目参数用于表示本小区内属于所述目标组的MTC终端数目;The receiving unit is configured to receive a first message sent by the MME that includes a target group identifier and a parameter of the number of MTC terminals, the target group identifier is used to identify the target group, and the parameter of the number of MTC terminals is used to indicate that the cell belongs to the The number of MTC terminals in the target group;
分配单元,用于根据所述第一消息中的MTC终端数目参数调整随机接入资源;An allocating unit, configured to adjust random access resources according to the MTC terminal number parameter in the first message;
发送单元,用于向本小区内属于所述目标组的所有MTC终端下发第二消息,所述第二消息用于指示所述MTC终端从调整后的随机接入资源中进行选择并接入。a sending unit, configured to send a second message to all MTC terminals belonging to the target group in the cell, where the second message is used to instruct the MTC terminal to select from adjusted random access resources and access .
由上述技术方案所描述的本发明实施例中可知,从接收到的第一消息里的目标组标识和MTC终端数目参数中可以获知本小区内属于所述目标组的所述MTC终端的数目,进而可以对本小区内的随机接入资源进行调整,使得调整后的随机接入资源可以满足所述目标组内所有MTC终端的接入请求,降低了现有技术中的MTC终端在接入时发生冲突的概率。From the embodiment of the present invention described by the above technical solution, it can be known that the number of the MTC terminals belonging to the target group in the cell can be known from the target group identifier and the number of MTC terminal parameters in the received first message, Furthermore, the random access resources in the cell can be adjusted so that the adjusted random access resources can meet the access requests of all MTC terminals in the target group, reducing the occurrence of MTC terminals in the prior art when accessing. probability of conflict.
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为实施例1中随机接入资源的分配方法的流程图;FIG. 1 is a flowchart of a method for allocating random access resources in Embodiment 1;
图2为实施例1中随机接入资源的分配装置的结构图;FIG. 2 is a structural diagram of an apparatus for allocating random access resources in Embodiment 1;
图3为实施例2中随机接入资源的分配方法的流程图;FIG. 3 is a flowchart of a method for allocating random access resources in Embodiment 2;
图4为实施例2中随机接入资源的分配方法的流程图;FIG. 4 is a flowchart of a method for allocating random access resources in Embodiment 2;
图5为实施例2中随机接入资源的分配方法的流程图;FIG. 5 is a flowchart of a method for allocating random access resources in Embodiment 2;
图6为实施例2中随机接入资源的分配方法的流程图;FIG. 6 is a flowchart of a method for allocating random access resources in Embodiment 2;
图7为实施例2中随机接入资源的分配装置的结构图。Fig. 7 is a structural diagram of an apparatus for allocating random access resources in Embodiment 2.
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1:Example 1:
本发明实施例的应用场景中,属于同一个签约用户的多个MTC终端构成一个目标组,每一个这种类型的目标组都具有惟一的目标组标识,即,目标组标识用于标识目标组。属于同一个目标组中的多个MTC终端可以位于同一个小区中,也可以分散位于多个不同的小区中。在现有技术中,基于组的寻呼过程中,MME只会发一条寻呼消息给一个无线接入节点来寻呼这个组的所有设备,在这个寻呼消息中只包含这个组标识,这样单单从这个组标识中,无线接入节点是无法获知在这个无线接入节点所覆盖的区域内到底有多少终端设备会被寻呼,因此,也就没有足够的信息来决定分配多少基于竞争的随机接入资源来供终端设备使用,以减少随机接入冲突概率。In the application scenario of the embodiment of the present invention, multiple MTC terminals belonging to the same subscriber form a target group, and each target group of this type has a unique target group identifier, that is, the target group identifier is used to identify the target group . Multiple MTC terminals belonging to the same target group may be located in the same cell, or may be dispersed in multiple different cells. In the prior art, in the group-based paging process, the MME only sends a paging message to a radio access node to page all devices in the group, and the paging message only contains the group identifier, so From this group identifier alone, the wireless access node cannot know how many terminal devices will be paged in the area covered by the wireless access node, so there is not enough information to decide how many contention-based Random access resources are used by terminal devices to reduce the probability of random access collisions.
如图1所示,本发明实施例提供一种随机接入资源的分配方法,该方法包括以下步骤:As shown in FIG. 1, an embodiment of the present invention provides a method for allocating random access resources, which includes the following steps:
101、接收包括有目标组标识和MTC终端数目参数的第一消息,MTC终端数目参数用于表示本小区内属于目标组的MTC终端数目。101. Receive a first message including a target group identifier and a parameter of the number of MTC terminals, where the parameter of the number of MTC terminals is used to indicate the number of MTC terminals belonging to the target group in the current cell.
在一个实施例中,第一消息可以由MME下发。由于MTC终端设备一般不会发生移动,或者发生移动的频率较少,或者只在一段小区域范围内移动,因此,MME在寻呼属于同一目标组中的所有MTC终端设备时,可以知道该目标组内的各个MTC终端设备当前是处于哪个无线接入网节点的覆盖范围内。In an embodiment, the first message may be delivered by the MME. Since MTC terminal devices generally do not move, or move less frequently, or only move within a small area, MME can know the target when paging all MTC terminal devices belonging to the same target group Which wireless access network node each MTC terminal device in the group is currently within the coverage of.
上述第一消息可以是触发消息。在一个实施例中,该触发消息可以为一条寻呼消息,如,当MME下发寻呼消息给一个无线接入网点时,就会在所述寻呼消息中携带目标组标识和该无线接入网点覆盖区域内的属于所述目标组标识的MTC终端数目。The above-mentioned first message may be a trigger message. In one embodiment, the trigger message may be a paging message. For example, when the MME sends a paging message to a wireless access network point, the paging message will carry the target group identifier and the wireless access point. The number of MTC terminals belonging to the target group identifier within the network coverage area.
在一个实施例中,该触发消息还可以为广播消息或者MBMS(MultimediaBroadcasting/Multicast Service,多媒体广播业务)消息或者CBS(cell broadcastservice,小区广播业务)消息,使得无线接入网点通过广播消息或MBMS消息或CBS消息,使得MTC设备接入网络。当然可以理解的是,在另一个实施例中,该触发消息还可以为其它可以触发终端的消息。In one embodiment, the trigger message can also be a broadcast message or an MBMS (Multimedia Broadcasting/Multicast Service, Multimedia Broadcast Service) message or a CBS (cell broadcast service, cell broadcast service) message, so that the wireless access network point can transmit the message through the broadcast message or the MBMS message. or a CBS message to enable the MTC device to access the network. Of course, it can be understood that, in another embodiment, the trigger message may also be other messages that can trigger the terminal.
当然可以理解的是,在另一个实施例中,无线接入网点也可以从CBC(CellBroadcast Center,小区广播业务中心)获得这个第一消息。Of course it can be understood that, in another embodiment, the wireless access network point may also obtain the first message from a CBC (CellBroadcast Center, cell broadcast service center).
102、当接收到所述第一消息之后,可以从所述第一消息中获知目标组标识和属于该目标组的MTC终端数目参数。然后,根据所述MTC终端数目参数调整随机接入资源。调整后的随机接入资源可以满足本小区内属于上述目标组中的所有MTC终端设备的接入需求。102. After the first message is received, the target group identifier and the parameter of the number of MTC terminals belonging to the target group may be obtained from the first message. Then, the random access resources are adjusted according to the parameter of the number of MTC terminals. The adjusted random access resources can meet the access requirements of all MTC terminal devices belonging to the above target group in the cell.
103、向本小区内属于所述目标组的所有MTC终端下发第二消息,从而唤醒本小区内属于所述目标组的所有MTC终端,所述第二消息可以为寻呼消息。所述第二消息用于指示所述MTC终端从调整后的随机接入资源中进行选择并接入。103. Send a second message to all MTC terminals belonging to the target group in the local cell, so as to wake up all the MTC terminals belonging to the target group in the local cell, and the second message may be a paging message. The second message is used to instruct the MTC terminal to select and access from adjusted random access resources.
从上述方法的实现过程中可以看出,当所述MTC终端收到所述第二消息之后,就会从调整后的随机接入资源中进行选择并接入。与现有技术中所述MTC终端仍然从原来有限的随机接入资源中进行选择并接入相比,降低了所述MTC终端为响应而发起随机接入时的碰撞概率。It can be seen from the implementation process of the above method that after receiving the second message, the MTC terminal will select and access from the adjusted random access resources. Compared with the prior art where the MTC terminal still selects and accesses from the original limited random access resources, the collision probability when the MTC terminal initiates random access in response is reduced.
相应地,本发明实施例还提供一种随机接入资源的分配装置,如图2所示,该装置包括:接收单元21、分配单元22和发送单元23。Correspondingly, the embodiment of the present invention also provides a device for allocating random access resources. As shown in FIG. 2 , the device includes: a
接收单元21,用于接收包括有目标组标识和MTC终端数目参数的第一消息。从所述第一消息中可以获知目标组标识和MTC终端数目参数。目标组标识用于标识目标组,MTC终端数目参数用于表示本小区内属于上述目标组的MTC终端数目。该第一消息可以是触发消息,触发消息的具体形式在前述实施例中已经详细描述,在此不再赘述。在一个实施例中,第一消息可以由MME下发。The receiving
分配单元22,用于根据所述第一消息中的MTC终端数目参数调整随机接入资源。所述调整后的随机接入资源可以满足本小区内属于所述目标组的所有MTC终端的接入请求。The allocating
发送单元23,用于向本小区内属于所述目标组标识的所有MTC终端下发第二消息,所述第二消息可以是寻呼消息,用于指示所述MTC终端从调整后的随机接入资源中进行选择并接入。The sending
本发明实施例中的随机接入资源的分配装置可以根据目标组标识和MTC终端数目参数进行随机接入资源的调整,并通过第二消息通知本小区内的所述属于该目标组的MTC终端设备从调整后的随机接入资源中进行接入。与现有技术比,降低了所述MTC终端接入时发生冲突的概率。The device for allocating random access resources in the embodiment of the present invention can adjust the random access resources according to the target group identifier and the number of MTC terminals, and notify the MTC terminals belonging to the target group in the cell through a second message The device performs access from the adjusted random access resources. Compared with the prior art, the probability of collision occurring when the MTC terminal accesses is reduced.
实施例2:Example 2:
本发明实施例提供一种随机接入资源的分配方法,如图3所示,该方法包括以下步骤:An embodiment of the present invention provides a method for allocating random access resources, as shown in FIG. 3 , the method includes the following steps:
301、无线接入网节点接收MME下发的包括有目标组标识(Group ID)和MTC终端数目参数(number)的第一消息。301. The radio access network node receives the first message sent by the MME and includes the target group identifier (Group ID) and the MTC terminal number parameter (number).
由于MTC终端设备一般不会发生移动,或者发生移动的频率较少,或者只在一段小区域范围内移动,因此,MME在寻呼属于同一目标组中的所有MTC终端设备时,可以知道该目标组内的各个MTC终端设备当前是处于哪个无线接入网节点的覆盖范围内。Since MTC terminal devices generally do not move, or move less frequently, or only move within a small area, MME can know the target when paging all MTC terminal devices belonging to the same target group Which wireless access network node each MTC terminal device in the group is currently within the coverage of.
在一个实施例中,该第一消息可以是触发消息。在一个实施例中,该触发消息可以为一条寻呼消息,如,当MME下发寻呼消息给一个无线接入网点时,就会在所述寻呼消息中携带目标组标识和MTC终端数目参数。通过所述MTC终端数目参数来表示本小区内属于所述目标组的MTC终端数目。该MTC终端数目参数为数字或者表示范围的索引值。如,上述无线接入网点覆盖的区域范围内有20个属于这个组的MTC终端设备,那么MME可以在上述第一寻呼消息里携带20给所述无线接入网点,或者也可以携带一个索引值,这个索引值表示的是一个10~30范围的数目。In one embodiment, the first message may be a trigger message. In one embodiment, the trigger message may be a paging message, for example, when the MME sends a paging message to a wireless access network point, it will carry the target group identifier and the number of MTC terminals in the paging message parameter. The number of MTC terminals belonging to the target group in the current cell is represented by the parameter of the number of MTC terminals. The parameter of the number of MTC terminals is a number or an index value representing a range. For example, if there are 20 MTC terminal devices belonging to this group within the area covered by the above-mentioned wireless access network point, then the MME may carry 20 to the wireless access network point in the above-mentioned first paging message, or may carry an index Value, this index value represents a number ranging from 10 to 30.
在一个实施例中,该触发消息还可以为广播消息或者MBMS消息或者CBS消息,使得无线接入网点通过广播消息或MBMS消息或CBS消息,使得MTC设备接入网络。当然可以理解的是,在另一个实施例中,该触发消息还可以为其它可以触发终端的消息。当然可以理解的是,在另一个实施例中,无线接入网点也可以从CBC获得这个第一消息。In an embodiment, the trigger message may also be a broadcast message or an MBMS message or a CBS message, so that the wireless access network point enables the MTC device to access the network through the broadcast message or the MBMS message or the CBS message. Of course, it can be understood that, in another embodiment, the trigger message may also be other messages that can trigger the terminal. Of course it can be understood that, in another embodiment, the wireless access network point may also obtain the first message from the CBC.
302、当无线接入网点接收到第一消息之后,可以从第一消息中获知目标组标识和属于该目标组的MTC终端数目参数。然后,根据所述MTC终端数目参数调整随机接入资源。302. After receiving the first message, the wireless access network point may obtain the target group identifier and the parameter of the number of MTC terminals belonging to the target group from the first message. Then, the random access resources are adjusted according to the parameter of the number of MTC terminals.
在具体实施过程中,可以采用如下方式进行:首先无线接入网点根据所述第一消息中的MTC终端数目参数自适应地调整系统广播消息中的随机接入资源,比如,所述MTC终端数目参数为20,那么可以相应增加系统广播消息中的随机接入资源,使得调整后的随机接入资源可以满足本小区内的所述20个MTC终端的接入需求。In the specific implementation process, the following method can be adopted: first, the wireless access network point adaptively adjusts the random access resources in the system broadcast message according to the parameter of the number of MTC terminals in the first message, for example, the number of MTC terminals If the parameter is 20, then the random access resources in the system broadcast message can be increased accordingly, so that the adjusted random access resources can meet the access requirements of the 20 MTC terminals in the cell.
然后,无线接入网点会更新所述系统广播消息,并通知本小区内所有的终端设备获取更新后的系统广播消息。Then, the wireless access network point updates the system broadcast message, and notifies all terminal devices in the cell to obtain the updated system broadcast message.
303、无线接入网点向本小区内属于所述目标组的所有MTC终端下发第二消息,从而唤醒本小区内属于上述目标组内的所有MTC终端,所述第二消息可以是寻呼消息。所述第二消息用于指示所述MTC终端从更新后的系统广播消息里的随机接入资源中进行选择并接入。在具体实施过程中,上述通知本小区内所有的终端设备获取更新后的系统广播消息可以通过独立的一条寻呼消息下发,而所述第二消息也可以通过一条寻呼消息进行下发,指示所述MTC终端从更新后的系统广播消息里的随机接入资源中进行选择并接入。或者,也可以在同一条寻呼消息中实现通知本小区内所有的终端设备获取更新后的系统广播消息并指示所述MTC终端从更新后的系统广播消息里的随机接入资源中进行选择并接入。具体通过几条寻呼消息进行实现通知系统广播消息更新和指示终端从更新后的系统广播消息中介入,在此不做限制,只要可以实现上述两个操作即可。当所述本小区内属于目标组内的所有MTC终端接收到所述第二消息之后就会从更新后的系统广播消息里的随机接入资源中选择一个合适的随机接入资源进行接入。303. The wireless access network point sends a second message to all MTC terminals belonging to the target group in the local cell, thereby waking up all the MTC terminals in the cell belonging to the target group, and the second message may be a paging message . The second message is used to instruct the MTC terminal to select and access from random access resources in the updated system broadcast message. In the specific implementation process, the system broadcast message notifying all terminal devices in the cell to obtain the update can be sent through an independent paging message, and the second message can also be sent through a paging message, Instructing the MTC terminal to select and access from the random access resources in the updated system broadcast message. Alternatively, in the same paging message, it is also possible to notify all terminal devices in the cell to obtain the updated system broadcast message and instruct the MTC terminal to select from the random access resources in the updated system broadcast message and access. Specifically, several paging messages are used to notify the update of the system broadcast message and instruct the terminal to intervene from the updated system broadcast message. There is no limitation here, as long as the above two operations can be realized. After receiving the second message, all the MTC terminals belonging to the target group in the local cell will select an appropriate random access resource from the random access resources in the updated system broadcast message to access.
另外,在具体实施过程中,也可以先向本小区内属于所述目标组的所有MTC终端下发第二消息,然后再根据所述MTC终端数目参数自适应地调整系统广播消息中的随机接入资源,并更新所述系统广播消息。当所述MTC终端收到所述第二消息之后,就会从更新后的系统广播消息里的随机接入资源中进行选择并接入。无论采取哪一种顺序进行随机资源的调整,都可以降低所述MTC终端的接入冲突。In addition, in the specific implementation process, it is also possible to first send the second message to all MTC terminals belonging to the target group in the cell, and then adaptively adjust the random access rate in the system broadcast message according to the parameter of the number of MTC terminals. input resources, and update the system broadcast message. After the MTC terminal receives the second message, it will select and access from the random access resources in the updated system broadcast message. No matter which order is adopted to adjust the random resources, the access conflict of the MTC terminal can be reduced.
本发明实施例在减少上述MTC设备发生接入冲突的同时,为了减少对上述系统广播消息的更新而导致寻呼更多的终端设备,还可以将上述方法进行改变,如图4所示,上述方法中的步骤302和步骤303还可以采用如下步骤302A和步骤303A进行替换,从而实现随机接入资源的调整。In the embodiment of the present invention, while reducing the access conflicts of the above-mentioned MTC devices, in order to reduce the paging of more terminal devices due to the update of the above-mentioned system broadcast messages, the above-mentioned method can also be changed, as shown in FIG. 4 , the above-mentioned Step 302 and step 303 in the method can also be replaced by the following step 302A and step 303A, so as to realize the adjustment of random access resources.
302A:上述无线接入网点根据第一消息中的MTC终端数目参数分配专用随机接入资源。该专用的随机接入资源只提供给本小区内属于该目标组中的所有MTC终端。在一个实施例中,上述专用随机接入资源可以包括:时频资源、或者前导码资源、或者前两者的组合。302A: The wireless access network point allocates dedicated random access resources according to the parameter of the number of MTC terminals in the first message. The dedicated random access resources are only provided to all MTC terminals belonging to the target group in the cell. In an embodiment, the above-mentioned dedicated random access resources may include: time-frequency resources, or preamble resources, or a combination of the former two.
303A:然后,上述无线接入网点向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源的第二消息,该第二消息可以是寻呼消息。303A: Then, the wireless access network point sends a second message including the dedicated random access resource to all MTC terminals in the cell belonging to the target group, where the second message may be a paging message.
如,在LTE系统中,无线接入网点可以为eNB。eNB可在第二消息里通过prach-configIndex这个参数来指示哪些时域、频域资源可供使用,通过numberofRA-Preambles这个参数来指示哪些前导码可供使用。上述第二消息中还可以携带参数用于指示分配的专用随机接入资源到期或连续多少个无线帧用于专用随机接入等参数。当所述专用的随机接入资源到期之后,将会得到释放,从而利于其他的终端设备再次使用。For example, in an LTE system, the wireless access network point may be an eNB. In the second message, the eNB may use the parameter prach-configIndex to indicate which time domain and frequency domain resources are available, and use the parameter numberofRA-Preambles to indicate which preambles are available. The above-mentioned second message may also carry parameters for indicating that the allocated dedicated random access resource expires or how many consecutive radio frames are used for the dedicated random access and other parameters. When the dedicated random access resource expires, it will be released, so as to facilitate reuse by other terminal devices.
所述第二消息用于指示所述MTC终端从所述第二消息所包含的专用随机接入资源中进行选择并接入。当所述MTC终端收到该第二消息后,就会从所述第二消息所包含的专用随机接入资源中选择一个合适的接入资源进行网络接入。The second message is used to instruct the MTC terminal to select and access from the dedicated random access resources included in the second message. After receiving the second message, the MTC terminal will select a suitable access resource from the dedicated random access resources included in the second message to access the network.
本发明实施例中的随机接入资源的分配装置可以根据目标组标识和MTC终端数目参数进行随机接入资源的调整,并通过第二消息通知本小区内的所述属于该目标组的MTC终端设备从调整后的随机接入资源中进行接入。与现有技术比,降低了所述MTC终端接入时发生冲突的概率。进一步,该方法通过为目标组的所有MTC终端提供专用的随机接入资源,减少了所述MTC终端的接入冲突,同时还减少了无线接入网点对系统广播消息的更新。The device for allocating random access resources in the embodiment of the present invention can adjust the random access resources according to the target group identifier and the number of MTC terminals, and notify the MTC terminals belonging to the target group in the cell through a second message The device performs access from the adjusted random access resources. Compared with the prior art, the probability of collision occurring when the MTC terminal accesses is reduced. Further, the method reduces the access conflicts of the MTC terminals by providing dedicated random access resources for all the MTC terminals in the target group, and at the same time reduces the updating of system broadcast messages by the wireless access network points.
为了更好地减少目标组内大量MTC终端设备响应消息而发生的随机接入冲突,同时尽力减少对系统消息的更新,如图5所示,上述方法中的步骤303A还可以采用下述步骤303B进行替换:In order to better reduce the random access conflicts that occur when a large number of MTC terminal devices in the target group respond to messages, and at the same time try to reduce the update of system messages, as shown in Figure 5, step 303A in the above method can also use the following step 303B to replace:
303B:上述无线接入网点向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源的第二消息,该第二消息可以是寻呼消息,用来指示所述MTC终端从第二消息里的专用随机接入资源和当前系统广播消息里的随机接入资源组成的集合中进行选择并接入。303B: The wireless access network point sends a second message including the dedicated random access resource to all MTC terminals in the cell belonging to the target group, the second message may be a paging message, and is used to indicate the The MTC terminal selects and accesses from the set consisting of the dedicated random access resources in the second message and the random access resources in the current system broadcast message.
如,当前系统广播消息里广播的可用于随机接入的子帧是0,1,2,3,无线接入网节点在所述第二消息里为这个目标组分配的专用随机接入的子帧是4,5,6。这样,当目标组内的MTC设备终端接收到第二消息后,就可以判断出自己可选择的用于随机接入的子帧是0,1,2,3,4,5,6。而对于非目标组内的终端设备,仍然使用当前系统广播消息里的随机接入子帧0,1,2,3作为可选择的随机接入子帧。上述第二消息中还可以携带参数用于指示分配的专用随机接入资源到期或连续多少个无线帧用于专用随机接入等参数。当所述专用的随机接入资源到期之后,将会得到释放,从而利于其他的终端设备再次使用。For example, the subframes available for random access broadcast in the current system broadcast message are 0, 1, 2, and 3, and the subframes allocated by the radio access network node for this target group in the second message Frames are 4, 5, 6. In this way, after the MTC device terminals in the target group receive the second message, they can determine that the subframes they can select for random access are 0, 1, 2, 3, 4, 5, and 6. For the terminal devices in the non-target group, the random access subframes 0, 1, 2, and 3 in the current system broadcast message are still used as optional random access subframes. The above-mentioned second message may also carry parameters for indicating that the allocated dedicated random access resource expires or how many consecutive radio frames are used for the dedicated random access and other parameters. When the dedicated random access resource expires, it will be released, so as to facilitate reuse by other terminal devices.
另外,本发明实施例还考虑到采用上述步骤303A或303B的方法中,所述无线接入网节点下(即,本小区内)的目标组内MTC终端设备在可供选择的随机接入资源中选择一个随机接入资源时也可能产生冲突,即几个MTC终端设备选择了相同的资源进行随机接入,因而,本实施例还提供一种改进方法,如图6所示,在上述步骤303A或步骤303B的基础上进行改进得到下述步骤303C。In addition, the embodiment of the present invention also considers that in the method using the above step 303A or 303B, the MTC terminal equipment in the target group under the wireless access network node (that is, in the local cell) is in the optional random access resource Conflicts may also occur when a random access resource is selected, that is, several MTC terminal devices select the same resource for random access. Therefore, this embodiment also provides an improved method, as shown in FIG. 6, in the above steps Improvements are made on the basis of step 303A or step 303B to obtain the following
303C:上述无线接入网点B向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源和预设参数的第二消息,该第二消息可以是寻呼消息,所述预设参数用于将所述MTC终端在时间域上分散地进行随机接入网络。303C: The wireless access network point B sends a second message including the dedicated random access resource and preset parameters to all MTC terminals in the cell belonging to the target group, the second message may be a paging message, The preset parameters are used for randomly accessing the network by the MTC terminal in a time domain.
在一个实施例中,如,在LTE系统中,无线接入网点可以为eNB。当所述MTC终端收到所述第二消息后,可以按照下述方式一进行选择:根据所述预设参数从所述第二消息里包含的专用随机接入资源中选择目标接入资源进行接入。所述预设参数可以是一个取模的参数,也可以是一个时间的参数。如,所述MTC终端设备可以将自己的一个标识进行M取模,其结果作为选择随机接入资源的依据。例如得出的结果为5时表示选择子帧5。或者,所述MTC终端设备可以将自己的一个标识进行M取模,其结果作为推迟若干个无线帧后进行随机接入。本方式一是与步骤303A相对应的改进。In one embodiment, for example, in an LTE system, the wireless access network point may be an eNB. After the MTC terminal receives the second message, it can select according to the following method one: select a target access resource from the dedicated random access resources contained in the second message according to the preset parameters to perform access. The preset parameter may be a modulo parameter or a time parameter. For example, the MTC terminal device may perform M modulo on one of its own identifiers, and use the result as a basis for selecting random access resources. For example, when the obtained result is 5, it means that subframe 5 is selected. Alternatively, the MTC terminal device may perform M modulo on one of its own identifiers, and as a result, perform random access after delaying several radio frames. The first way is an improvement corresponding to step 303A.
或者,当所述MTC终端收到所述第二消息后,可以按照下述方式二进行选择:根据所述预设参数从所述第二消息里包含的专用随机接入资源和当前系统广播消息里的随机接入资源组成的集合中选择目标接入资源进行接入。所述预设参数可以是一个取模的参数,也可以是一个时间的参数。本方式二是与步骤303B相对应的改进。Or, after the MTC terminal receives the second message, it can make a selection according to the following method two: according to the preset parameters, select from the dedicated random access resources contained in the second message and the current system broadcast message The target access resource is selected from the set of random access resources in the target access resource for access. The preset parameter may be a modulo parameter or a time parameter. The second method is an improvement corresponding to step 303B.
本发明实施例中的随机接入资源的分配装置可以根据目标组标识和MTC终端数目参数进行随机接入资源的调整,并通过第二消息通知本小区内的所述属于该目标组的MTC终端设备从调整后的随机接入资源中进行接入。与现有技术比,降低了所述MTC终端接入时发生冲突的概率。进一步,该方法通过为目标组的所有MTC终端提供专用的随机接入资源,减少了所述MTC终端的接入冲突,同时还减少了无线接入网点对系统广播消息的更新。进一步,通过第二消息指示所述MTC终端从第二消息里的专用随机接入资源和当前系统广播消息里的随机接入资源组成的集合中进行选择并接入,更好地减少目标组内大量MTC终端设备响应消息而发生的随机接入冲突,同时尽力减少对系统消息的更新。进一步,通过在第二消息中包含预设参数,进一步减少了目标组内大量MTC终端设备响应消息而发生的随机接入冲突。The device for allocating random access resources in the embodiment of the present invention can adjust the random access resources according to the target group identifier and the number of MTC terminals, and notify the MTC terminals belonging to the target group in the cell through a second message The device performs access from the adjusted random access resources. Compared with the prior art, the probability of collision occurring when the MTC terminal accesses is reduced. Further, the method reduces the access conflicts of the MTC terminals by providing dedicated random access resources for all the MTC terminals in the target group, and at the same time reduces the updating of system broadcast messages by the wireless access network points. Further, the second message instructs the MTC terminal to select and access from the set composed of the dedicated random access resource in the second message and the random access resource in the current system broadcast message, so as to better reduce the A large number of MTC terminal devices respond to random access collisions of messages, and at the same time try to reduce the update of system messages. Further, by including the preset parameters in the second message, the random access conflicts caused by a large number of MTC terminal devices in the target group responding to the message are further reduced.
相应地,本发明实施例还提供一种随机接入资源的分配装置,如图7所示,该装置包括接收单元41,分配单元42和发送单元43。Correspondingly, the embodiment of the present invention also provides a device for allocating random access resources. As shown in FIG. 7 , the device includes a receiving
其中,所述接收单元41用于接收MME下发的包括有目标组标识和MTC终端数目参数的第一消息。所述第一消息可以为触发消息,该触发消息的形式在前面实施例中已经详细描述,在此不再赘述。Wherein, the receiving
所述分配单元41包括第一分配模块41A,用于根据所述第一消息中的MTC终端数目参数自适应地调整系统广播消息中的随机接入资源;更新所述系统广播消息;然后发送单元43用于发送通知本小区内所有的终端设备获取更新后的系统广播消息的消息。此时,所述发送单元43还用于向本小区内属于所述目标组的所有MTC终端下发第二消息,该第二消息可以是寻呼消息,用来指示所述MTC终端从更新后的系统广播消息里的随机接入资源中进行选择并接入。在具体实施过程中,所述发送单元43还可以通过发送一条寻呼消息来实现通知系统广播消息的更新和指示终端从更新后的系统广播消息中接入。The
或者,可选的,所述分配单元41包括第二分配模块41B,用于根据所述第一消息中的MTC终端数目参数分配专用随机接入资源。此时相应地,所述发送单元43用于向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源的第二消息,此时,所述第二消息用于指示所述MTC终端从第二消息里包含的专用随机接入资源中进行选择并接入。采用所述第二分配模块41B的装置可以减少系统广播消息更新的频率。Or, optionally, the allocating
或者,可选的,在上述第二分配模块41B根据所述第一消息中的MTC终端数目参数分配专用随机接入资源后,所述发送单元43用于向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源的第二消息,此时,所述第二消息用于指示所述MTC终端从第二消息里包含的专用随机接入资源和当前系统广播消息里的随机接入资源组成的集合中进行选择并接入。Or, optionally, after the above-mentioned second allocation module 41B allocates dedicated random access resources according to the MTC terminal number parameter in the first message, the sending
或者,可选的,在上述第二分配模块41B根据所述第一消息中的MTC终端数目参数分配专用随机接入资源后,所述发送单元43用于向本小区内属于所述目标组的所有MTC终端发送包含有所述专用随机接入资源和预设参数的第二消息,所述预设参数用于将所述MTC终端在时间域上分散地进行随机接入网络。Or, optionally, after the above-mentioned second allocation module 41B allocates dedicated random access resources according to the MTC terminal number parameter in the first message, the sending
此时,所述第二消息用于指示所述MTC终端根据所述预设参数从所述第二消息里包含的专用随机接入资源中选择目标接入资源进行接入,或者用于指示所述MTC终端根据所述预设参数从所述第二消息里包含的专用随机接入资源和当前系统广播消息里的随机接入资源组成的集合中选择目标接入资源进行接入。At this time, the second message is used to instruct the MTC terminal to select a target access resource to access from the dedicated random access resources contained in the second message according to the preset parameters, or to indicate the The MTC terminal selects a target access resource to access from the set consisting of the dedicated random access resource included in the second message and the random access resource in the current system broadcast message according to the preset parameter.
上述随机接入资源的分配装置可以为基站等,通过调整系统广播消息里的随机接入资源或者重新分配专用的随机接入资源,降低了本小区中同一组内的所有MTC终端设备的接入冲突。The device for allocating random access resources above can be a base station, etc., by adjusting the random access resources in the system broadcast message or reallocating dedicated random access resources, the access rate of all MTC terminal devices in the same group in the cell is reduced. conflict.
本发明实施例主要应用于通信技术领域,无线接入网节点根据本小区内同一个组中的MTC设备的数目实现了自适应地分配随机接入资源,减小了MTC设备在随机接入网络时发生冲突的概率。The embodiment of the present invention is mainly applied in the field of communication technology. The wireless access network node realizes the adaptive allocation of random access resources according to the number of MTC devices in the same group in the cell, reducing the number of MTC devices in the random access network. probability of a conflict occurring.
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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