CN100396114C - Method for realizing load redistribution in association route/location update - Google Patents

Method for realizing load redistribution in association route/location update Download PDF

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CN100396114C
CN100396114C CN 200510076964 CN200510076964A CN100396114C CN 100396114 C CN100396114 C CN 100396114C CN 200510076964 CN200510076964 CN 200510076964 CN 200510076964 A CN200510076964 A CN 200510076964A CN 100396114 C CN100396114 C CN 100396114C
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sgsn
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CN1878342A (en
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周四红
华 黄
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华为技术有限公司
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Abstract

本发明公开了一种存在Gs接口的情况下,在联合路由/位置更新中实现负载重分配的方法,该方法在无线接入网络节点中,同时对服务GPRS支持节点(SGSN)和MSC进行负载重分配,选择合适的SGSN和MSC分别作为目的SGSN和目的MSC,并将选择的目的MSC标识传递给目的SGSN,目的SGSN只需根据目的MSC标识,将位置请求更新消息发送给目的MSC即可,该方法保证了MSC负载的动态平衡,同时也使负载控制决策节点(LCDN)得到了统一。 The present invention discloses a case where one kind of the presence of the Gs interface, load reallocation method in the United routing / location update, the radio access method in a network node, while the serving GPRS support node (SGSN) and MSC load redistribution, select the appropriate MSC and SGSN and the destination SGSN as the destination MSC, and the MSC identifying the selected object is passed to the object SGSN, SGSN simply according to the destination MSC object identifier, the location update request message can be sent to the destination MSC, this method ensures that MSC dynamic balance the load, but also the load control decision node (LCDN) has been unified.

Description

在联合路由/位置更新中实现负载重分配的方法 The method of reallocation of the load in the joint routing / location update

技术领域 FIELD

本发明涉及负栽重分配技术,尤指一种存在Gs接口的情况下,在联合路由/位置(RA/LA)更新中实现核心网(CN)节点负载重分配的方法。 The present invention relates to the case of negative redistribution plant technology, particularly to a presence of the Gs interface, the method Core Network (CN) nodes heavy load distribution in the joint update routing / location (RA / LA) is implemented.

背景技术 Background technique

第三代合作伙伴计划(3GPP)标准TS23.236提出了池区域的概念,即若干个无线接入网络(RAN)节点,如无线网络控制器(RNC)或基站控制器(BSC)覆盖的区域组成一个池区域。 Third Generation Partnership Project (3GPP) standard TS23.236 proposes a concept of pool area, i.e., a plurality of Radio Access Network (RAN) nodes such as radio network controller (RNC) or base station controller (BSC) covers a region form a pool area. 一个池区域通常由若干个CN节点并行地提供服务,也可以由一个CN节点提供服务。 A pool area is typically served by a plurality CN nodes in parallel, may also be served by one CN node. 当一个池区域由若干个CN节点并行地提供服务时,这些CN节点即组成一个CN节点池,即MSC 池或服务GPRS支持节点(SGSN)池。 When a pool area consists of several parallel service nodes CN, the CN node that is composed of such a pool CN node, i.e. MSC pool or serving GPRS support node (SGSN) pool.

为了在一个CN节点池中标识一个CN节点,每个CN节点被分配一个或若干个网络资源标识(NRI),并通过操作维护(O&M)操作将分配的NRI配置在CN节点中。 In order to identify a cell node CN a CN node, each node is assigned a CN or several network resource identifier (the NRI), and through the operation and maintenance NRI (O & M) is arranged in operation to assign node CN. 当CN节点为某移动终端(MS)分配临时移动用户标识(TMSI)或分组临时移动用户标识(P-TMSI)时,同时将该CN节点的NRI标识携带在TMSI/P-TMSI中发送给该MS,这样就给该MS指定了一个提供服务的CN,可将该CN称为服务CN。 When the CN node allocates a temporary mobile subscriber identity (TMSI) for a mobile terminal (MS) or a packet temporary mobile subscriber identity (P-TMSI), while sending the NRI carried in the CN node identification TMSI / P-TMSI to the in MS, the MS so give CN specifies a service provider, the service may be referred to as the CN CN. 这里,若CN节点是MSC, 则为MS分配TMSI;若CN节点是SGSN,则为MS分配P-TMSI。 Here, if the CN node is the MSC, MS was allocated the TMSI; if the CN node is the SGSN, the MS is allocated, compared with P-TMSI.

在某池区域内,当MS建立与CN节点的非接入层(NAS)连接时,RAN 节点^4居初始NAS消息中携带的NRI,将该初始NAS消息路由到NRI对应的CN节点。 Within a pool area, the MS when establishing a connection with a non-access stratum CN node (NAS), the RAN node UN ^ 4 initial NAS message carries the NRI, routes the initial NAS message to the CN node corresponding to the NRI. 可见,RAN节点是根据TMSI/P-TMSI中携带的NRI来选择CN节点的。 Visible, RAN node selects a CN node according to the TMSI / P-TMSI carried in the NRI.

为了控制CN节点池内各CN节点的负载,降低CN节点过载的风险, In order to control the load of each pool CN node CN node, reduce the risk of overload of the CN node,

目前的处理是:当MS执行位置更新或路由更新时,由RAN节点根据CN 节点池内各CN节点的负载状况,将MS转移到负载低的CN节点中。 The current process is: when the MS performs location update or routing update, by the RAN node pool CN node according to load status of each CN node, the MS will transition to the low load in the CN node. 按照协议规定,RAN节点是负栽控制决策节点(LCDN, Load Controlling Node )。 Under the agreement, RAN node is a decision node negative control plant (LCDN, Load Controlling Node).

这里,在以下情况,CN节点会向RAN节点发送负载信息通知消息, 以提供当前CN节点的负载状况信息: Here, in the following case, the CN node will send a load information notification message to the RAN node to provide a current load status information CN node:

① RAN节点请求CN节点提供负栽信息; ① RAN node requests the CN node providing a negative plant information;

② CN节点池中加入新的CN节点,该新CN节点重启后; ② CN node in the pool to a new CN node, after the new CN node restart;

③ CN节点的负载级别发生变化; ③ CN node load level changes;

④ 因0&M等操作需要停止某CN节点提供服务; ©取消对CN节点的0&M操作计划。 ④ due to the 0 & M and other operations need to stop a CN node to provide services; © cancel 0 & M operations plan for CN node.

其中,CN节点的当前负载状况可用负载级别指标来表示, 一般,将CN 节点的负栽级别均匀地划分为k个等级,若某CN节点的级别为n,则代表该CN节点为k分之n满负栽,这里,n《k。 Wherein the current load status of the available CN node load level indicators to represent, generally, a negative plant level CN ​​node is evenly divided into k levels, if the level of a CN node is n, represents the CN node as per k n full load plant, where, n "k. 例如某CN节点的负载级别被均匀划分为8个等级,即k-8,那么,若该CN节点负载级别为0,则表示该CN节点为空负栽;若该CN节点负载级别为8,则表示该CN节点为满负载;若该CN节点负载级别为4,则表示该CN节点为半负栽等等。 For example a load level of a CN node is evenly divided into eight levels, i.e., k-8, then, if the CN node load level is 0, it indicates that the CN node is empty negative plant; if the CN node load level is 8, it indicates that the full load is CN node; CN node if the load level is 4, it indicates that the node is a negative semi-CN plant and the like. 需要注意的是,空载并不是表示该CN节点内没有用户,而是指该CN节点的负载最低。 It should be noted that the load does not mean there is no user within the CN node, but refers to the minimum load of the CN node.

RAN节点收到负载信息通知消息后,可从消息中获得CN节点的以下负载信息和状态信息: RAN node receives a load information notification message, the CN node can obtain from the message the status and load information:

CN节点池内唯一标识CN节点的CN节点标识;CN节点的当前负栽级别、指示该CN节点是否为新投入使用的新CN节点指示、指示CN节点是否将进行操作维护的0&M操作指示、以及指示从发送负载信息通知消息到执行O&M操作之间的时间间隔。 CN node identifier CN node pool that uniquely identifies the CN node; current negative plant level, indicating that the CN node is new in use the new CN node indication, indicating whether the CN node will be 0 & M operation instruction operation and maintenance, and instructions for CN node intervals from the load information notification message to the execution time between the O & M operation.

RAN节点根据接收到的负栽信息通知消息中携带的以上信息,按照以下负栽分配原则对CN节点进行负栽重分配,选择合适的CN节点: RAN node notification message carries the above information in accordance with information received negative plant, plant negatively reallocate assigned according to the following principles CN node negative plant, select an appropriate CN node:

1)若0&M操作指示为"1",说明该CN节点将进行操作维护,则该 1) If the 0 & M operation instruction is "1", the CN node will be described operation and maintenance, the

CN节点将从此不被选择,除非收到新的负载信息通知消息中指示0&M操作净皮取消,即收到0&M操作指示为"0"; CN node will not be selected from, unless the new notification message is received load information indicating the 0 & M net Paper cancel operation, i.e., 0 & M received operation instruction is "0";

2) 若新CN节点指示为"1",说明该CN节点是新投入使用的,则在一定时间内所有用户都选择连接到该CN节点中; 2) If the new CN node indicated as "1", indicating that the new CN node is in use, at a certain time all users choose to connect to the CN node;

3) 除以上两种情况外,RAN节点将选择负载级别最低的CN节点为用户提供服务。 3) In addition to these two cases, RAN node will select the lowest level load CN nodes provide services for users.

综上所述,RAN节点能够通过负栽信息通知消息获得CN节点的负载信息和状态信息。 In summary, RAN node can be notified by the negative message plant information obtaining load information and status information in the CN node. 这样,当RAN节点收到UE发起的联合位置/路由(RA/LA) 更新请求,RAN节点根据当前UE所在的原CN节点的负载状况进行负栽重分配,选择合适的CN节点作为当前的CN节点。 Thus, when the UE initiates the RAN node receives combined position / route (RA / LA) update request, the RAN node negatively redistribution plant load conditions original CN node where the UE currently, select an appropriate CN node as the current CN node. 比如,UE所在的原CN 节点的过载,RAN节点将MS转移到其它负载低的CN节点上,达到负栽动态调整的目的。 For example, where the original CN node overload UE, the RAN node of the MS is transferred to the other CN node low loads, to achieve the purpose of dynamic adjustment of negative plant. 这里所说的过栽可以是预先设置好的一个标准。 Mentioned here can be planted over a pre-set standard.

但是,现有技术的上述方案在存在Gs接口的情况下,达不到对负栽进行动态调整的目的。 However, the above prior art solutions in the presence of the Gs interface, to reach the purpose of dynamically adjusting the negative plant.

众所周知,CN从逻辑上分为电路交换(CS)域和分组交换(PS)域。 Known, CN is divided into circuit switched (CS) domain and a packet switched (PS) domain from the logic. MSC/拜访位置寄存器(VLR)是CS域的功能节点,SGSN是PS域的功能节点,MSC/VLR与SGSN之间可以通过Gs接口相连接,MSC/VLR与SGSN 之间也可以不相连,这里将MSC/VLR与SGSN之间通过Gs接口相连接的情况称为存在Gs接口的情况。 MSC / visitor location register (VLR) is a function node CS domain, the SGSN node PS domain is functional, can be connected via an interface Gs between the MSC / VLR and the SGSN, may not be connected between the MSC / VLR and the SGSN, where the situation between the MSC / VLR via the Gs interface and the SGSN is connected to is referred to the presence of the Gs interface. MSC/VLR、 SGSN分别通过Iu—CS接口、 Iu—PS 接口与RAN节点相连。 MSC / VLR, SGSN respectively Iu-CS interface Iu-PS interface is connected to the RAN node.

从上述可见,当存在Gs接口的情况下,RAN节点通过Iu_PS接口与SGSN连接,再通过Gs接口与MSC连接,此时,如果MS发起联合RA/LA 更新,为了节省空口资源,协议没有规定信令由RAN节点通过Iu—CS接口直接传给MSC,所以RAN节点没有办法通过位置更新过程重新选择MSC, 即当原MSC发生过载时,不能通过RAN节点进行负载重分配,选择合适的MSC。 Seen from the above, a case where the presence of Gs interface, the RAN node is connected via Iu_PS interface to the SGSN, and then connected to the MSC via the Gs interface, In this case, if the MS initiates a combined RA / LA update, in order to save air interface resources, protocol does not specify the letter order Iu-CS interfaces directly to the MSC, so there is no way to re-select RAN node MSC, i.e. when the carrier is not the original MSC through the RAN node load redistribution occurred, select the appropriate location update procedure by the MSC through the RAN node through.

图1是现有技术存在Gs接口的情况下,联合RA/LA更新处理的流程图, FIG. 1 is a case where the presence of the Gs interface of the prior art, the flowchart combined RA / LA update process,

联合RA/LA更新是UE向RAN节点发起的包括路由和/或位置更新的请求, 其中路由更新请求由SGSN处理,位置更新请求由MSC处理。 Combined RA / LA update is initiated by the UE to the RAN node comprising routing and / or location update request, wherein the request is handled by the SGSN routing update, location update request is handled by MSC. 这里,假设RAN节点是RNC ,该联合RA/LA更新处理过程具体包括以下步骤: Here, we assume that the RAN node is the RNC, the combined RA / LA update process comprises the following steps:

步骤100: UE向RNC发起路由区更新请求(Routeing Area Update Request)消息。 Step 100: UE initiates an update request (Routeing Area Update Request) message to the routing area RNC.

步骤101: RNC根据SGSN节点的负载情况,进行负载重分配,选择合适的SGSN。 Step 101: RNC according to the load of the SGSN node, load redistribution, select the appropriate SGSN.

本步骤的处理与上文所述对CN节点进行负载重分配,选择合适的CN 节点的方法完全一致,这里不再重述。 Processing step described above of the present load reallocation CN node, select an appropriate CN node exactly the same manner will not be repeated here. 其中,RNC通过负栽信息通知消息中携带的负栽和状态信息,获得SGSN节点的负载情况。 Wherein, the RNC notifies a negative and plant state information carried by the negative message plant information obtained load SGSN node.

步骤102: RNC将Routeing Area Update R叫uest消息发送给所选择的SGSN。 Step 102: RNC the called uest Routeing Area Update R message is sent to the selected SGSN.

本步骤中,SGSN根据Routeing Area Update Request消息中携带的更新类型(UpdateType)字段中的指示信息做如下处理: In this step, SGSN treated as follows according Routeing Area Update Request message carries the update type indication information (the UpdateType) field:

若Update Type字段中指明为联合RA/LA更新,且Update Type字段的内容还包括IMSI附着的联合路由/位置更新请求(combined RA / LA update with IMSI attach requested ),或者该Routeing Area Update Request消息中的位置区标识(LAI)标识了LA发生改变,则说明该路由区更新是需要从SGSN经Gs接口向MSC发起位置更新请求的,进入步骤103; If the Update Type field specified as combined RA / LA update, and the content Update Type field further comprises a combined routing IMSI attach / location update request (combined RA / LA update with IMSI attach requested), or the Routeing Area Update Request message the location area identification (LAI) identifying the LA changes, then the routing area update is needed from the SGSN via the Gs interface to the MSC initiates a location update request, proceeds to step 103;

否则,说明该路由区更新属于不存在Gs接口情况下的联合RA/LA更新请求,不属于本文讨论的范围内,其具体实现可参见3GPP TW23.060协议规定,这里不再描述。 Otherwise, the instructions belonging to the routing area update in the Gs interface joint where RA / LA update request does not exist, does not fall within the scope of this paper, which can be found in 3GPP TW23.060 specific implementation agreement, it will not be described herein.

步骤103: SGSN根据国际移动用户标识(IMSI)计算并选择MSC。 Step 103: SGSN and an MSC is calculated according to International Mobile Subscriber Identity (IMSI). 一般,根据IMSI计算并选择MSC的方法是:按照协议规定,SGSN使用路由区标识(RAI)和从IMSI中到处的HASH值来选择MSC,某一段HASH值对应某一个MSC。 In general, the method of calculating according to the IMSI and an MSC is: according to the agreement, the use of the SGSN routing area identification (RAI), and the IMSI is selected from HASH value everywhere MSC, HASH value corresponding to a certain period of one MSC. 这样,就选择了当前发送位置请求消息的MSC。 Thus, the current selected MSC sends a location request message. 其中,RAI和IMSI是携带在Routeing Area Update R叫uest消息的Update Wherein, RAI and IMSI are called uest message carrying the Routeing Area Update R Update

上述根据IMSI计算并选择MSC的方法可见,本步骤中,对MSC的选择与MSC当前的负载状况没有任何关系,这样的处理,难以保证选择的MSC能提供最好的服务,很可能选择的MSC是满栽的。 The method of calculating the IMSI and an MSC of the foregoing, the present step, the selection of the MSC and the MSC of the current load status has nothing to do, so the process is difficult to ensure the selected MSC can provide the best service, it is possible to select the MSC It is planted in full.

也就是说,现有技术这种根据IMSI计算并选择MSC的处理,达不到对MSC进行负载重分配的目的。 That is, this calculation and select the prior art process according to MSC IMSI, the MSC to reach the purpose of load reallocated.

步骤104: SGSN将位置更新请求(Location Update Request)消息发送给选择好的MSC。 Step 104: SGSN a location update request (Location Update Request) message to select a good MSC.

步骤105 ~步骤106: MSC将携带有自身TMSI的位置更新接收(Location Update Accept)消息,发送给SGSN; SGSN将接收到的当前MSC 的TMSI携带在路由区更新接收(Routeing Area Update Accept)消息中,发送给UE。 Step 105 ~ Step 106: MSC carrying the position itself TMSI receive updates (Location Update Accept) message sent to the SGSN; SGSN received the present MSC TMSI carries the update receiving (Routeing Area Update Accept) in the routing area message , to the UE.

本步骤中,如果在步骤101中,SGSN发生了变化,则SGSN需要同时将接收到的当前MSC的TMSI和当前SGSN的P-TMSI携带在Routeing Update Accept消息中,发送给UE。 In this step, if in step 101, SGSN has changed, the SGSN need to be received TMSI to the current MSC and SGSN of the current P-TMSI carried in Routeing Update Accept message to the UE.

一般而言,当移动终端发起联合路由/位置更新时,CN节点均会发生改变,但也可能有SGSN和MSC中其一发生改变,或二者均未发生改变的情况,此情况下,联合路由/位置更新处理过程不变,只是,在上述步骤105-步骤106中,还可能存在两种情况: Generally, when the mobile terminal initiates a combined routing / location update, CN node will change, but there may be one of the MSC and the SGSN changes, or changes in circumstances of both not occur, in this case, the joint routing / location update process unchanged, but, in the above step 105- step 106, there may be two situations:

若SGSN和MSC中其一发生改变,则Routeing Area Update Accept消息中携带发生改变的TMSI或P-TMSI; If one of the MSC and SGSN is changed, the Routeing Area Update Accept message carries the TMSI or P-TMSI is changed;

若SGSN和MSC均发生改变,贝'J Routeing Area Update Accept消息中可以不携带TMSI和P-TMSI 。 If the MSC and SGSN change occurred, Tony 'J Routeing Area Update Accept message may not carry the TMSI and P-TMSI.

上述是UE发起联合RA/LA更新的现有处理过程,更具体的处理流程可以参见3GPPTS 23.060协议规定,这里不再重述。 The above-described conventional processes are UE initiated combined RA / LA update, the process flow may more specifically refer to 3GPPTS 23.060 agreement will not be repeated here.

需要强调的是,从现有方法步骤103可见,在存在Gs接口的情况下, 由SGSN来选择MSC,根据现有的处理方法,SGSN通过IMSI计算并选择 It is emphasized that, seen from the prior method steps 103, in the presence of a Gs interface, the MSC is selected by the SGSN, according to conventional processing method, and select the SGSN by calculating IMSI

MSC,而不是根据MSC当前的负载状况来选择MSC。 MSC, rather than select MSC MSC according to the current load conditions. 这样的处理,达不到对MSC进行负载重分配的目的,不能保证MSC负载的动态平衡。 Such a process, not the purpose of load redistribution to the MSC, the MSC can not guarantee the dynamic balance of the loads.

根据目前的协议,SGSN不能获得MSC当前的负载状况信息,所以在SGSN是不能根据负载进行选择MSC,也是不能进行负载重新分配。 Under the current agreement, SGSN can not get the current load status information MSC, SGSN so can not be selected MSC according to the load, but also can not load redistribution. 即使SGSN能够获得MSC的负载信息,但由SGSN来选择MSC也违背了RAN 节点为LCDN的思想,造成了多个LCDN的情况,即此时包括RNC和SGSN 两个LCDN,使得决策点不统一,且决策机制也会变得十分复杂。 Even if SGSN can obtain load information of MSC, but by the SGSN to select MSC also contrary to the RAN node LCDN ideas, resulting in a plurality of LCDN, that at this time, including two LCDN RNC and SGSN, making the decision point is not uniform, and the decision-making mechanism will become very complicated.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供一种在联合RA/LA更新中实现负载重分配的方法,该方法能够达到在协议规定的LCDN节点对CN节点进行负载重分配,保证CN节点负载的动态平衡和负载控制决策节点的统一。 In view of this, the main object of the present invention is to provide a method implemented in a heavy load distribution combined RA / LA update, the process load can achieve a weight distribution node CN node LCDN predetermined protocol, to ensure that the load node CN homeostasis and load control unified decision node.

为达到上述目的,本发明的技术方案具体是这样实现的: To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

一种在联合路由/位置RA/LA更新中实现负栽重分配的方法,在存在Gs接口的情况下,该方法包括以下步骤: A Method of Negative plant in the United redistribution routing / location RA / LA update, in the presence of the Gs interface, the method comprising the steps of:

A.无线接入网络RAN节点接收到来自移动终端的路由区更新消息后,根据核心网CN节点的负载情况进行负载重分配,确定目的服务GPRS支持节点SGSN和目的MSC; A. After the radio access network RAN ​​node receives a routing area update message from the mobile terminal, heavy load according to a load of a core network CN node, determines the destination serving GPRS support node SGSN and the MSC purposes;

求发送给目的SGSN,目的SGSN向目的MSC发送位置更新请求消息。 Request sent to the destination SGSN, SGSN sends a location update object request message to the destination MSC.

在步骤A之前,该方法还包括:所述RAN节点根据所述路由区更新请求 Prior to step A, the method further comprising: the RAN node according to the routing area update request

中的指示信息,确定当前更新为联合RA/LA更新。 Indicating the information to determine the current update for joint RA / LA update.

在步骤A之前,确定当前更新为联合RA/LA更新后,该方法还包括:所 Before the step A, determines that the current update combined RA / LA update, the method further comprising: the

述RAN节点根据所述路由区更新请求中的指示信息确定当前更新为IMSI附着 Said RAN node determines the current update IMSI attach information update request according to the instruction of the routing area

的联合路由/位置更新请求,或者是LA发生改变。 Joint routing / location update request, or a change in LA.

在步骤B中,所述RAN节点将目的MSC标识发送给目的SGSN之后,目 After the step B, the RAN node identifier to the destination object the SGSN MSC, mesh

的SGSN向目的MSC发送位置更新请求消息之前,该方法还包括: SGSN previous update request message to the target MSC sends a location, the method further comprising:

目的SGSN根据所述接收到的路由区更新请求中的指示信息确定当前更新为IMSI附着的联合路由/位置更新请求,或者是LA发生改变。 United object SGSN routing update is determined that the current IMSI attach / location update request, or the LA information is changed according to an instruction of the routing area update request is received. 在步骤B中,所述发送目的MSC标识的方法为: 将所述目的MSC标识携带于路由区更新请求消息的新增字段中发送; 或将所述目的MSC标识携带于路由区更新请求消息中已有的保留字段中 In Step B, the method for identifying the transmission destination MSC: MSC to the destination identification carried in the new field of transmitting the routing area update request message; MSC identity or the object carrying the routing area update request message retention of existing fields

发送; send;

或将所述目的MSC标识携带于专门用于发送目的MSC标识的消息中发送。 Or the destination MSC identity carried in the message sent specifically for the purpose of transmitting the identified MSC.

所述MSC标识为唯一标识MSC的MSC ID,或者是由CN分配的NRI。 Said MSC identification that uniquely identifies the MSC MSC ID, or assigned by the CN NRI. 该方法还包括:所述目的MSC将自身临时移动用户标识TMSI携带在位置请求接收消息中,发送给所述目的SGSN,所述目的SGSN将所述接收到的目的MSC的TMSI携带在路由区更新接收消息中,发送给所迷移动终端。 The method further includes: the destination MSC itself temporary mobile subscriber identity TMSI carried in the received location request message and sends to the destination SGSN, SGSN to the destination MSC to the destination of the received TMSI carried in the routing area update receiving a message, the mobile terminal transmits to the fans.

该方法还包括:目的SGSN同时将自身的分组临时移动用户标识P-TMSI 携带在路由区更新接收消息中,发送给移动终端。 The method further comprises: while the object itself SGSN Packet Temporary Mobile Subscriber Identity P-TMSI carried in the route update message receiving area, to the mobile terminal.

步骤A中所述负载重分配的方法为:RAN节点根据CN节点向自身发送的负载信息和状态信息,按照已有的负栽分配原则选择目的SGSN和目的MSC。 Step A method for the redistribution of the load: RAN node according to the load and status information transmitted to the CN node itself according to the existing plant dispensing negative selection principle object and purpose SGSN MSC. 所述RAN节点为无线网络控制器RNC或基站控制器BSC。 The RAN node is a radio network controller RNC or base station controller BSC. 由上述技术方案可见,本发明在RAN节点接收到来自MS的路由区更新请求消息后,根据该消息中携带的指示信息确定该路由区更新是需要通过SGSN经Gs接口向MSC发起位置更新请求的,则RAN节点根据当前CN 节点的负载情况,选择目的SGSN和目的MSC,之后将目的MSC标识携带在路由区更新请求消息中发送到目的SGSN;目的SGSN向目的MSC标识对应的目的MSC发送位置更新请求消息;目的MSC接收到位置更新请求消息后,将自身TMSI携带在位置更新接收消息中发送给目的SGSN,目的SGSN将接收到的目的MSC的TMSI,或者接收到的目的MSC的TMSI和目的SGSN自身的P-TMSI携带在路由区更新接收消息中,发送给UE。 Above technical solutions found by the present invention in the RAN node receives the routing area from the MS update request message, determining that the routing area update is needed by the SGSN via the Gs according to the instruction in the message carried in the interface to the MSC initiates a location update request , the RAN node based on the current load CN node selection object SGSN and the destination MSC, then the destination MSC identity carried in the update request message to the destination SGSN in the routing area; object SGSN to the destination MSC corresponding to the identifier of the destination MSC sends a location update request message; destination MSC to the destination MSC receives the location update request message, the self-TMSI carried in the location update sent to the destination SGSN receives the message, the destination SGSN of the received TMSI, or the received destination MSC to TMSI and objects SGSN P-TMSI carries its own update message received in the routing area, to the UE.

该方法在协议规定的RAN节点对MSC进行了负栽重分配,并将在RAN The method RAN node in a predetermined protocol the MSC a negative reallocation plant, and the RAN

节点选择的目的MSC的目的MSC标识发送给目的SGSN,目的SGSN能将位置更新请求消息发送给当前选择的MSC,保证了MSC负栽的动态平衡。 Node objects selected destination MSC to the destination MSC identity SGSN, SGSN object location update request message can be sent to the currently selected MSC, the MSC negative planted to ensure dynamic balance. 另外,该方法在协议规定的LCDN节点,即RAN节点对MSC进行负载重分配,保证了负载控制决策节点的统一,也使决策机制变简单了。 Further, the method LCDN predetermined protocol nodes, i.e. MSC RAN node to load redistribution to ensure the unity of the load control decision node makes a decision-making mechanism becomes simple.

附图说明 BRIEF DESCRIPTION

图1是现有技术存在Gs接口的情况下,联合RA/LA更新处理的流程图; 图2是本发明存在Gs接口的情况下,联合RA/LA更新处理的流程图; 图3是本发明实施例流程图。 FIG. 1 is a case where the presence of the Gs interface of the prior art, the flowchart combined RA / LA update process; FIG. 2 is a flowchart of a case where the Gs interface, combined RA / LA update process of the present invention; FIG. 3 of the present invention is flowchart embodiment.

具体实施方式 Detailed ways

本发明的核心思想是:当移动终端向无线接入网络节点发起联合RA/LA 更新处理过程,且存在Gs接口的情况下,本发明在协议规定的无线接入网络节点同时对SGSN和MSC进行负载重分配,选择了当前负栽状况最佳的MSC,保证了MSC负载的动态平衡,同时也保证了负载控制决策节点的统 The core idea of ​​the invention is: when the mobile terminal initiates a combined RA / LA updating process to the wireless access network node, and the presence of the Gs interface, while the present invention SGSN the MSC and the radio access network node in a predetermined protocol load redistribution, select the current negative situation best planted MSC, MSC ensure the dynamic balance the load, but also to ensure that the load control decision node system

为使本发明的目的、技术方案及优点更加清楚明白,以下参照附图并举较佳实施例,对本发明进一步详细说明。 For purposes of this invention, the technical solution and merits thereof more apparent, the preferred embodiments with reference to the accompanying drawings and the following embodiments, the present invention is further described in detail.

图2是本发明存在Gs接口的情况下,联合RA/LA更新处理的流程图, 具体包括以下步骤: FIG 2 is a case where the presence of the Gs interface of the present invention, a flowchart combined RA / LA update processing includes the following steps:

步骤200〜步骤201: RAN节点接收来自MS的路由区更新请求消息, 并根据CN节点的负载情况,进行负载重分配,选择目的SGSN和目的MSC。 Step 200~ Step 201: RAN node receiving a routing area update request message from the MS and CN node according to the load, the load redistribution, object selection and object SGSN MSC.

本步骤中,RAN节点选择目的SGSN为现有技术,这里不再重述。 In this step, the RAN node selects SGSN object of the prior art, are not repeated here. RAN 节点是否进行目的MSC的选择有下面两种方法: RAN node MSC whether the purpose of selecting the following two methods:

(1) 若RAN节点确定路由区更新请求消息携带的指示信息指明为联合RA/LA更新,则RAN节点根据CN节点负载情况,选择目的MSC 。 (1) determining if the RAN node a routing area update request message carries the indication information indicating for joint RA / LA update, the RAN node CN node according to load, select the destination MSC.

(2) 若RAN节点确定路由区更新请求消息携带的指示信息包含有IMSI 附着的联合路由/位置更新请求(combined RA / LA update with IMSI attach requested),或者是LA发生改变,说明该路由区更新需要通过SGSN经Gs 接口向MSC发起位置更新请求,则RAN节点根据CN节点负栽情况,选择目的MSC。 (2) If the RAN node determines routing area update indication information request message carried with integrated routing IMSI attach / location update request (combined RA / LA update with IMSI attach requested), or the LA changes, indicating that the routing area update need SGSN via the Gs interface initiates a location update request to the MSC, the RAN node negative cases plant according to the CN node, select the destination MSC.

如果采用上述第(2)种方法决定是否进行目的MSC的选择,若路由区更新请求消息携带的指示信息中没有combined RA / LA update with IMSI attach r叫uested,或者LA未发生改变,则说明该路由区更新属于不存在Gs接口下的联合RA/LA更新请求,不属于本文讨论的范围内,其具体实现可参见3GPPTW23.060协议规定,这里不再描述。 According to the above (2) method determines whether the destination MSC selection, if the routing area update indication information request message carries no combined RA / LA update with IMSI attach r called uested, or the LA has not changed, then the belonging to the routing area update in the Gs interface combined RA / LA update request does not exist, it does not fall within the scope of this paper, which can be found 3GPPTW23.060 specific implementation agreement, will not be described herein.

本步骤中,RAN节点通过负载信息通知消息中携带的负栽和状态信息,获得CN节点的负载情况,以及对SGSN或MSC进行负栽重分配处理与现有技术中所述对CN节点进行负栽重分配,选择合适的CN节点的方法完全一致,这里不再重述。 In this step, the RAN node notifies planted by a negative load information and status information carried in the message, the CN node to obtain the load, as well as the MSC or SGSN negative redistribution processing plant in the prior art to negatively CN node plant reallocation appropriate CN node selection method consistent, not be repeated here.

步骤202: RAN节点将选择的目的MSC标识和路由区更新请求发送给目的SGSN。 Step 202: RAN node selected destination MSC identity and routing area update request sent to the destination SGSN.

本步骤中,目的MSC标识是唯一用于标识MSC的一个符号,比如可以是在网络设计中分配给MSC的唯一标识MSC的固定的MSC ID,或者是由CN分配的NRI等。 In this step, a destination MSC ID is a unique symbol for identifying the MSC, such as may be assigned to uniquely identify the MSC MSC MSC ID in the fixed network design, or the like assigned by the CN NRI.

一般,路由区更新请求通过路由区更新请求消息发送;目的MSC标识可以携带于路由区更新请求消息中发送,也可以采用一条专门用于发送目的MSC标识的消息来发送,比如发送MSC重分配标识消息。 In general, the routing area update request message sent by a routing update request area; destination MSC identity may carry on sending the routing area update request message, a dedicated message may be employed for transmitting the destination MSC to send identifier, such as sending MSC identifier reallocation messages. 当目的MSC标识携带于路由区更新请求消息中时,可以在该路由区更新请求消息中新增一MSC重分配标识字段,用于存储目的MSC标识;也可以利用现有路由区更新请求消息中已有的保留字段携带MSC标识。 When the destination MSC identity carried in the routing area update request message, the request message may update a new MSC redistribution identification field for storing a destination MSC in the routing area identifier; can also use existing routing area update request message existing reserved field carrying the MSC logo.

步骤203:目的SGSN向接收到的目的MSC标识对应的目的MSC发送位置更新请求消息。 Step 203: SGSN object corresponding to the object received object identifier MSC MSC sends a location update request message.

本步骤中,如果步骤200~步骤201中,RAN节点采用第(2)种方法决 In this step, if the step 200 to step 201, the RAN node using the first (2) methods must

定是否进行目的MSC的选择,则目的SGSN直接向目的MSC发送位置更新请求消息即可。 Whether the purpose of the MSC selection, the destination SGSN to send a location update request message directly to the destination MSC.

如果步骤200-步骤201中,RAN节点采用第(l)种方法决定是否进行目的MSC的选择,则目的SGSN按照上述第(2)种方法判断该路由区更新请求消息是否为需要通过SGSN经Gs接口向MSC发起位置更新请求的,若是,则目的SGSN向目的MSC发送位置更新请求消息即可;否则,说明该路由区更新属于不存在Gs接口下的联合RA/LA更新请求,不属于本文讨论的范围内, 其具体实现可参见3GPPTW23.060协议规定,这里不再描述。 Step 200- if step 201, the RAN node using the first (l) method determines whether the selected destination MSC, SGSN determines the object according to the above (2) method of the routing area update request message is a need to SGSN via Gs Interface initiates a location update request to the MSC, and if so, then the destination SGSN can request message to the target MSC sends a location update; otherwise, the instructions belonging to the routing area update in the Gs interface combined RA / LA update request is not present, are not discussed herein within the scope, see 3GPPTW23.060 specific implementation agreement, it will not be described herein.

步骤204 ~步骤205:目的MSC将携带有自身TMSI的位置更新接收消息发送给目的SGSN,目的SGSN将接收到的目的MSC的TMSI携带在路由区更新接收消息中发送给UE。 Step 204 ~ Step 205: The destination MSC itself carries the TMSI receiving a location update message to the destination SGSN, SGSN object received TMSI carries the destination MSC to update the received message to the UE in the routing area.

本步骤的实现与现有技术中步骤105-步骤106完全一致,这里不再重述。 The prior art to achieve this step is the step step 106 105- identical, not be repeated here.

从上述本发明存在Gs接口的情况下,联合RA/LA更新处理的方法来看, 重要的是,在RAN节点中,同时对SGSN和MSC进行负载重分配,选择合适的SGSN和MSC分别作为目的SGSN和目的MSC,同时RAN节点通过消息,将选择的目的MSC标识传递给目的SGSN,目的SGSN只需根椐目的MSC标识,将位置请求更新消息发送给目的MSC即可。 From the presence of the Gs interface of the present invention, a method combined RA / LA update processing perspective, it is important, in the RAN node, SGSN and MSC while load redistribution, and select the appropriate SGSN as the destination MSC destination MSC and SGSN, RAN node while the message by the selected object is passed to the destination MSC identity SGSN, SGSN purposes only noted in the destination MSC identity, the location update request message can be sent to the destination MSC. 本发明方法保证了MSC负载的动态平衡,同时也保证了负载控制决策节点的统一。 The method of the present invention ensures that the dynamic balance load MSC, but also to ensure the unity of the load control decision node.

下面结合一实施例具体描述本发明的实现方法。 The following detailed description in conjunction with an embodiment of the inventive methods. 图3是本发明实施例流程图,这里假设RAN节点是RNC, CN节点池包括SGSN节点池和MSC节点池; 并且Routeing Area Update Request消息中Update Type字段的指示信息为指明为联合RA/LA更新,且还包括combined RA / LA update with IMSI attach requested,或者是LA发生改变,即该路由区更新请求消息是需要通过SGSN 经Gs接口向MSC发起位置更新的联合RA/LA更新请求消息。 FIG 3 is a flowchart illustrating embodiments of the present invention, RAN node is assumed here that the RNC, CN node SGSN node comprises a pool of MSC pool and the pool of nodes; and Routeing Area Update Request message indication information in the Update Type field is specified as a combined RA / LA Update and further comprising a combined RA / LA update with IMSI attach requested, or the LA changes, i.e., the routing area update request message is an SGSN via the Gs interface needed by the MSC to initiate a location update combined RA / LA update request message. 同时假设在本实施例中,在负载重分配中,SGSN不发生改变,MSC发生改变。 Also assume that in the present embodiment, the load weight distribution, the SGSN does not change, a change in the MSC. 具体实现步骤如下: Specific steps are as follows:

步骤300 ~步骤301: RNC接收来自MS的Routeing Area Update Request Step 300 ~ Step 301: RNC Routeing Area Update Request received from the MS

消息,并根据CN节点池中节点的负栽情况,进行负载重分配,选择目的 Message, and the plant according to the negative node CN node in the pool where, load redistribution, selected object

SGSN和目的MSC。 SGSN and the destination MSC.

本步骤中,RNC选择目的SGSN为现有技术,这里不再重述。 In this step, the RNC prior art to select the destination SGSN, are not repeated here.

假设RNC确定Routeing Area Update Request消息携带的Update Type Assuming that the RNC determines Routeing Area Update Request message carries the Update Type

字段中的指示信息指明为联合RA/LA更新后,RNC根据CN节点负载情况, After indicating the information field indicated as combined RA / LA update, the CN node according to load the RNC,

选择目的MSC。 Select the destination MSC.

本步骤中,对SGSN或MSC进行负载重分配处理与现有技术中所述对CN节点进行负载重分配,选择合适的CN节点的方法完全一致,这里不再重述。 In this step, the MSC or SGSN for a heavy load distribution processing in the prior art to load redistribution CN node, select an appropriate CN node exactly the same manner will not be repeated here.

步骤302: RNC将选择的目的MSC ID携带在Routeing Area Update Request消息中,发送给目的SGSN。 Step 302: RNC MSC ID of the selected object is carried in the Routeing Area Update Request message, sent to the destination SGSN.

本步骤中,目的MSC ID是CN预先分配的唯一用于标识MSC的一个符号。 In this step, the only object of the MSC ID is a symbol for identifying an MSC CN pre-assigned.

另夕卜,在Routeing Area Update Request消息中新增一MSC重分配标识字段,用于存储目的MSC标识。 Another Bu Xi, a new MSC identifier field redistribution in Routeing Area Update Request message, the destination MSC for storing identification.

步骤303:目的SGSN向接收到的目的MSC ID对应目的MSC发送Location Update Request消息。 Step 303: SGSN object corresponding to the object of the MSC ID to the received destination MSC transmits Location Update Request message.

本步骤中,目的SGSN确定路由区更新请求消息携带的指示信息包含有IMSI附着的联合路由/位置更新请求(combined RA / LA update with IMSI attach requested),或者是LA发生改变,说明该路由区更新需要通过SGSN 经Gs接口向MSC发起位置更新请求,则目的SGSN向目的MSC发送Location Update Request消息。 In this step, the object of the SGSN determines a routing area update indication information request message contains the IMSI attached Integrated Routing / Location Update Request (combined RA / LA update with IMSI attach requested), or the LA changes, indicating that the routing area update need SGSN via the Gs interface initiates a location update request to the MSC, the SGSN sends a location update request object message to the destination MSC.

步骤304 ~步骤305:目的MSC将携带有自身TMSI的Location Update Accept消息发送给目的SGSN,目的SGSN将接收到的目的MSC的TMSI 携带在Routeing Area Update Accept消息中发送给UE。 Step 304 ~ Step 305: The destination MSC itself carries the TMSI Location Update Accept message to the destination SGSN, SGSN object received TMSI carried in the destination MSC Routeing Area Update Accept message to the UE.

本步骤的实现与现有技术的步骤105~步骤106完全一致,这里不再重 And the step of prior art to achieve this step 105 to step 106 is exactly the same, here not retry

速。 speed.

以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围。 The above are only preferred embodiments of the present invention but are not intended to limit the scope of the present invention.

Claims (10)

1.一种在联合路由/位置RA/LA更新中实现负载重分配的方法,在存在Gs接口的情况下,其特征在于,该方法包括以下步骤: A.无线接入网络RAN节点接收到来自移动终端的路由区更新消息后,根据核心网CN节点的负载情况进行负载重分配,确定目的服务GPRS支持节点SGSN和目的MSC; B.RAN节点将所确定的目的MSC对应的目的MSC标识和路由区更新请求发送给目的SGSN,目的SGSN向目的MSC发送位置更新请求消息。 1. A method of reallocation of the load in the joint routing / location RA / LA update, in the presence of the Gs interface, wherein the method comprises the steps of: A. a radio access network RAN ​​node receives from after the routing area update message to the mobile terminal, heavy load according to a load of a core network CN node, determines the destination serving GPRS support node SGSN and the destination MSC; routing destination MSC ID and destination MSC corresponding to the determined node B.RAN area update request sent to the destination SGSN, SGSN sends a location update object request message to the destination MSC.
2. 根据权利要求1所述的方法,其特征在于,在步骤A之前,该方法还包括:所述RAN节点根据所述路由区更新请求中的指示信息,确定当前更新为联合RA7LA更新。 2. The method according to claim 1, wherein prior to step A, the method further comprising: the RAN node according to the indication information of the routing area update request, determining the current update for joint RA7LA update.
3. 根据权利要求2所述的方法,其特征在于,在步骤A之前,确定当前更新为联合RA/LA更新后,该方法还包括:所述RAN节点根据所述路由区更新请求中的指示信息确定当前更新为国际移动用户标识IMSI附着的联合路由/ 位置更新请求,或者是LA发生改变。 3. The method according to claim 2, wherein, prior to step A, determines the current update after combined RA / LA update, the method further comprising: the RAN node indicating the routing area update request in accordance with current update information is determined as international mobile subscriber identity IMSI attach the integrated routing / location update request, or a change in LA.
4. 根据权利要求2所述的方法,其特征在于,在步骤B中,所述RAN节点将目的MSC标识发送给目的SGSN之后,目的SGSN向目的MSC发送位置更新请求消息之前,该方法还包括:目的SGSN根据所述接收到的路由区更新请求中的指示信息确定当前更新为IMSI附着的联合路由/位置更新请求,或者是LA发生改变。 4. The method according to previous claim 2, characterized in that, in step B, the RAN node then the object identifier to the destination MSC SGSN, SGSN object request message to the target MSC sends a location update, the method further comprising : determining a current object SGSN routing update is combined IMSI attach / location update request, or the LA information is changed according to an instruction of the routing area update request is received.
5. 根据权利要求1所述的方法,其特征在于:在步骤B中,所述发送目的MSC标识的方法为:将所述目的MSC标识携带于路由区更新请求消息的新增字段中发送; 或将所述目的MSC标识携带于路由区更新请求消息中已有的保留字段中发送;或将所述目的MSC标识携带于专门用于发送目的MSC标识的消息中发送。 5. The method according to claim 1, wherein: in step B, the destination MSC transmitting method for the identification of: the destination MSC identity carried in the new field of the routing area update request message transmission; or the destination MSC identity carried in the routing area update request message has been transmitted a reserved field; or the destination MSC identity is carried in the dedicated transmission for transmitting the message destination MSC identity.
6. 根据权利要求1至5任一项所述的方法,其特征在于:所述MSC标识为唯一标识MSC的MSC ID,或者是由CN分配的网络资源标识NRL 6. A method according to any one of claims 1 to 5, wherein: said MSC identification that uniquely identifies the MSC MSC ID, or network resource allocation identified by the CN NRL
7. 根据权利要求1所述的方法,其特征在于,该方法还包括:所述目的MSC将自身临时移动用户标识TMSI携带在位置请求接收消息中,发送给所述目的SGSN,所述目的SGSN将所述接收到的目的MSC的TMSI携带在路由区更新接收消息中,发送给所述移动终端。 7. The method according to claim 1, wherein the method further comprises: the destination MSC itself temporary mobile subscriber identity TMSI carried in the received location request message, the SGSN transmits to the destination, the destination SGSN the destination MSC TMSI is received in the received message carrying the update routing area, to the mobile terminal.
8. 根据权利要求7所述的方法,其特征在于,该方法还包括:目的SGSN 同时将自身的分组临时移动用户标识P-TMSI携带在路由区更新接收消息中, 发送给移动终端。 8. The method according to claim 7, wherein the method further comprises: while the object itself SGSN Packet Temporary Mobile Subscriber Identity P-TMSI carried in the route update message receiving area, to the mobile terminal.
9. 根据权利要求1所述的方法,其特征在于,步骤A中所述负载重分配的方法为:RAN节点根据CN节点向自身发送的负载信息和状态信息,按照已有的负栽分配原则选择目的SGSN和目的MSC。 9. The method according to claim 1, wherein step A method for redistribution of the load: RAN node according to the load and status information transmitted to the CN node itself, in accordance with the principle of distribution existing plant negative select the destination and purpose SGSN MSC.
10. 根据权利要求1所述的方法,其特征在于:所述RAN节点为无线网络控制器RNC或基站控制器BSC。 10. The method according to claim 1, wherein: the RAN node is a radio network controller RNC or base station controller BSC.
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