WO2008151554A1 - Procédé, système et appareil pour déterminer la route dans un réseau à accès multiple par répartition en code - Google Patents

Procédé, système et appareil pour déterminer la route dans un réseau à accès multiple par répartition en code Download PDF

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Publication number
WO2008151554A1
WO2008151554A1 PCT/CN2008/071210 CN2008071210W WO2008151554A1 WO 2008151554 A1 WO2008151554 A1 WO 2008151554A1 CN 2008071210 W CN2008071210 W CN 2008071210W WO 2008151554 A1 WO2008151554 A1 WO 2008151554A1
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WO
WIPO (PCT)
Prior art keywords
node
unit
imsi
information
message
Prior art date
Application number
PCT/CN2008/071210
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English (en)
Chinese (zh)
Inventor
Sihai Ye
Tao Hui
Youjun Chen
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Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008151554A1 publication Critical patent/WO2008151554A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a method, system and apparatus for determining a route in a Code Division Multiple Access (CDMA) Code A Multiple Access (A-Flex) network.
  • CDMA Code Division Multiple Access
  • A-Flex Code A Multiple Access
  • the 1 :N (N is a natural number) connection between the Mobile Switch Center (MSC) and the Base Station Controller (BSC) controls the flexibility of the networking. For example, if an MSC is down for upgrade maintenance or failure, all BSCs connected to the MSC will be disabled, and all users within the BSC coverage will not be able to communicate with the circuit.
  • MSC Mobile Switch Center
  • BSC Base Station Controller
  • the A-Flex networking mode is introduced in CDMA.
  • One MSC can connect to multiple BSCs, and one BSC can also connect multiple MSCs. These MSCs form an MSC pool for one BSC connected, and the user does not need to change the serving MSC when moving in the pool area.
  • user-initiated initial layer 3 messages such as service request messages, location update request messages, paging response messages, etc., are generally based on the user's international mobile station identity (IMSI, International Mobile). Station Identity) to select a route.
  • IMSI international mobile station identity
  • Station Identity Station Identity
  • the specific operation process is as follows: The corresponding relationship between the IMSI and the MSC is configured on the BSC. After receiving the initial layer 3 message initiated by the user, the BSC selects the corresponding MSC according to the IMSI carried in the message of the initial layer 3 and the configured correspondence. Message distribution.
  • the operation management system (0&M) can configure the routing information shown in Table 1 on each BSC in the pool.
  • the BSC After receiving the initial layer 3 message initiated by the mobile station (MS, Mobile Station), the BSC extracts the IMSI, calculates the value of the IMSI/10 mod 1000, and then determines the destination MSC of the initial layer 3 message according to the value lookup table 1.
  • Table 1 the initial layer 3 message initiated by the mobile station (MS, Mobile Station)
  • each BSC in the pool area can modify its own saved routing information according to changes in network status in real time. For example, if BSC1 finds that its link with MSC3 is faulty, BSC1 can migrate the user on MSC3 to other reachable MSCs in the pool, such as MSC1, and route the routing information saved by BSC1 to the IMSI number of MSC3. Segment user route Modified to MSC1. At this time, if the MS of the IMSI number segment corresponding to the original MSC3 initiates an initial layer 3 message to the BSC1, the BSC1 will route the initial layer 3 message to the MSC1 by viewing the routing information.
  • the MSC3 needs to perform an inter-office location update to the Home Location Register (HLR).
  • HLR Home Location Register
  • the present invention provides a method, system and apparatus for determining a route in a CDMA network to reduce inter-office location updates.
  • the method for determining a route in another CDMA network is as follows: receiving a request for querying a CN node sent by a data distribution device, where the request includes an IMSI, and the IMSI is received by the data distribution device In the initial business message;
  • the information of the CN node is used by the message distribution device to send the initial service message to the selected CN node.
  • a system for determining a route in a CDMA network includes at least one message distribution device and at least one CN node, and further includes a data backup center, where The message distribution device is configured to receive an initial service message initiated by the user, send the IMSI carried in the initial service message to the data backup center, and according to the information of the CN node fed back by the data backup center, Sending an initial service message to the selected CN node;
  • the data backup center is configured to save a correspondence between the IMSI and the CN node of the user, and when receiving the IMSI sent by the message distribution device, according to the received IMSI, and the corresponding IMSI and CN node corresponding to the CN node The relationship selects a CN node and returns information of the selected CN node to the message distribution device.
  • the embodiment of the present invention further provides a data backup center, including: a data saving unit and a node determining unit, where
  • a data saving unit configured to save a correspondence between the user's IMSI and the CN node
  • a node determining unit configured to receive an IMSI from the message distribution device, select a CN node according to the received IMSI, and a correspondence between the IMSI and the CN node saved in the data saving unit, and return information of the selected CN node to The message distribution device.
  • the embodiment of the present invention further provides a message distribution device, including: a message receiving unit and a message distribution unit, where
  • a message receiving unit configured to receive an initial service message initiated by the user, and forward the received initial service message to the message distribution unit;
  • the message distribution unit is configured to send the IMSI carried in the received initial service message to the data backup center, and receive the information of the CN node returned by the data backup center, and send the received initial service message to the CN node.
  • all the message distribution devices in the pool determine the route of the user message according to the information held in the data backup center, instead of according to the The saved information is used to determine the routing of user messages. Therefore, the occurrence of changes in the user service CN node caused by the inconsistency of the routing information maintained by each message distribution device in the prior art is avoided, and the number of inter-office location updates is reduced.
  • FIG. 1 is a schematic diagram showing the connection relationship between an MSC and a BSC in a conventional CDMA network architecture in the prior art
  • FIG. 2 is a schematic diagram showing a connection relationship between an MSC and a BSC in a CDMA A-Flex network architecture in the prior art
  • FIG. 3 is a schematic diagram of a CDMA A-Flex network architecture for adding a data backup center according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for determining a route in a CDMA A-Flex network according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another CDMA A-Flex network architecture for adding a data backup center according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a system for determining a route in a CDMA A-Flex network according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a data backup center and a message distribution device according to an embodiment of the present invention
  • FIG. 8 is a node determining unit according to an embodiment of the present invention. Schematic diagram of the structure;
  • FIG. 9 is a schematic diagram of a CDMA A-Flex network architecture using a primary and backup data backup center according to an embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
  • connection relationship between the MSC 100 and the BSC 200 in the conventional CDMA network architecture is as shown in FIG. 1.
  • One MSC 100 can be connected to multiple BSCs 200, and one BSC 200 can only be connected to one MSC 100.
  • the connection relationship between the MSC 100 and the BSC 200 is as shown in FIG. 2.
  • FIG. 2 not only one MSC 100 can be connected to multiple BSCs 200, but also one BSC 200 can also be connected to multiple MSCs 100.
  • a BSC 200 is connected to form an MSC pool, and the user does not need to change the serving MSC when moving in the pool area.
  • an embodiment of the present invention provides a method for determining a route in a CDMA A-Flex network, including: setting a data backup center, and storing a correspondence between a user IMSI and an MSC in a data backup center;
  • the initial service message for example, after receiving the initial layer 3 message, selecting an MSC according to the IMSI carried in the initial layer 3 message and the correspondence between the IMSI and the MSC saved in the data backup center, and then the BSC will receive the initial layer 3 The message is routed to the selected MSC.
  • the correspondence between the IMSI and the MSC is not saved on the BSC, but the correspondence between the IMSI and the MSC is saved in the added data backup center.
  • all the BSCs in the pool determine the route of the user message based on the information stored in the data backup center. Therefore, the occurrence of changes in the user service MSC caused by the inconsistent routing information maintained by each BSC in the prior art is avoided, and the number of inter-office location updates is reduced.
  • the data backup center can be either a stand-alone physical device or a functional component in the MSC. In addition to the backup user IMSI and MSC correspondence, the data backup center can also be used to back up the user's location area identifier (LAI) and switch status. Moreover, the data backup center is fully interconnected with the MSC. When the user data in the MSC changes, the MSC needs to notify the data backup center to update the information it holds.
  • LAI location area identifier
  • the MSC informs the data backup center of the user information that is successfully registered or deleted; after receiving the data backup center, the IMSI of the user who successfully registered is saved and the user Corresponding relationship of the home MSC, or deleting the correspondence between the IMSI of the deleted user and the home MSC of the user.
  • the MSC can also notify the data backup center of the information that the user LAI changes and the user's power on/off information, and the data backup center receives the corresponding data after receiving it.
  • the data backup center can also set a separate timer for each user data. If no operation is performed on the user data corresponding to the timer within a certain timer protection time, that is, within the set time of the timer, the user data is deleted after the timer expires.
  • FIG. 3 is a schematic diagram of a CDMA A-Flex network architecture for adding a data backup center according to an embodiment of the present invention.
  • the following describes the routing in the CDMA A-Flex network in the embodiment of the present invention with reference to FIG. The method is described in detail.
  • the method flow is shown in FIG. 4, and mainly includes the following steps: Step 401: The MS initiates an initial layer 3 message to the BSC;
  • Step 402 After receiving the initial layer 3 message initiated by the MS, the BSC sends the IMSI carried in the initial layer 3 message to the data backup center.
  • Step 403 The data backup center selects an MSC according to the received IMSI and the corresponding relationship between the IMSI and the MSC saved by itself, and returns the selected MSC information to the BSC.
  • step 403 includes:
  • the data backup center After receiving the IMSI sent by the BSC, the data backup center searches for the corresponding relationship between the IMSI and the MSC stored by the BSC, and determines whether there is an MSC corresponding to the received IMSI. If there is a corresponding MSC, and the signaling point of the MSC The data backup center returns the MSC information to the BSC; if there is a corresponding MSC, but the signaling point of the MSC is unreachable, or it is determined that there is no corresponding MSC, the data backup center selects a signaling from the pool. The point-accessible MSC sends the selected MSC information to the BSC, and saves the correspondence between the received IMSI and the selected MSC. After that, the data backup center performs routing selection according to the newly saved correspondence.
  • the policy of the data backup center selecting a MSC that is reachable by a signaling point from the pool includes but is not limited to the following: selecting a MSC that is reachable by a signaling point from the pool according to the principle of round robin; or randomly selecting a letter from the pool MSCs with reachable points; or, select an MSC that is reachable by the lightest signaling point from the pool.
  • the routing determination methods described above are all described for the 7-load and control CDMA A-Flex network architecture. It should be noted that the present invention is equally applicable to a CDMA A-Flex network architecture in which bearer and control are separated.
  • the separation between bearer and control means that the MSC adopts a softswitch architecture, including a mobile switching center server (MSC Server) and a media gateway (MGW).
  • MSC Server mobile switching center server
  • MGW media gateway
  • the A-Flex function can be implemented either on the BSC or on the MGW.
  • the correspondence between the IMSI and the MSC Server is stored in the data backup center.
  • the A-Flex function is implemented on the BSC, the implementation process of the entire determined route is basically the same as that in FIG. 4, the difference is: after receiving the initial layer 3 message sent by the BSC and carrying the IMSI, the data backup center receives the The IMSI and the corresponding relationship between the IMSI and the MSC Server are selected, and an MSC Server is selected, and the selected MSC Server information is returned to the BSC; after the BSC receives the MSC Server information returned by the data backup center, the initial layer will be received. 3 The message is routed to the MSC Server.
  • the A-Flex function is implemented on the MGW, the action of querying the data backup center for the user's home MSC Server information is performed by the MGW. Upon completion, the data backup center needs to return the selected MSC Server information to the MGW, and then the MGW then routes the user initial layer 3 message to the MSC Server specified in the MSC Server information returned by the data backup center.
  • the process of how to select the MSC Server in the data backup center is similar to the step 403, and details are not described herein.
  • the BSC and the MGW may be collectively referred to as a message distribution device; the MSC and the MSC Server are collectively referred to as a core network (CN, Core Network) node.
  • CN Core Network
  • embodiments of the present invention also provide a system for determining a route in a CDMA A-Flex network.
  • the system structure is shown in FIG. 6, and mainly includes: a data backup center 300, at least one message distribution device 210, and at least one CN node 500. among them,
  • the data backup center 300 is configured to store a correspondence between the user IMSI and the CN node 500.
  • the message distribution device 210 is configured to receive an initial service message initiated by the user, for example, receive an initial layer 3 message, according to the IMSI carried in the initial layer 3 message, And the corresponding relationship between the IMSI and the CN node 500 held in the data backup center 300 selects a CN node, and routes the initial layer 3 message to the selected CN node 500.
  • the message distribution device 210 is configured to receive the initial layer 3 message initiated by the user, and then send the IMSI carried in the initial layer 3 message to the data backup center 300.
  • the data backup center 300 is configured to save the correspondence between the user IMSI and the CN node 500.
  • a CN node 500 is selected for the relationship, and the selected CN node information, the information of the CN node to be selected, is returned to the message distribution device 210 to instruct the message distribution device 210 to route the initial layer 3 message to the selected CN node 500. .
  • the data backup center 300 may specifically include: a data saving unit 320 and a node determining unit 310.
  • the message distributing device 210 may specifically include: a message receiving unit 211 and a message distributing unit 212. among them,
  • the data saving unit 320 is configured to save a correspondence between the user IMSI and the CN node 500.
  • the node determining unit 310 is configured to receive the IMSI from the message distribution device 210, according to the received IMSI and the IMSI and the CN saved in the data saving unit 320. Corresponding relationship of the node 500 selects a CN node, and returns the selected CN node information to the message distribution device 210;
  • the message receiving unit 211 is configured to receive the initial layer 3 message initiated by the user, and forward the received initial layer 3 message to the message distributing unit 212;
  • the message distribution unit 212 is configured to send the IMSI carried in the received initial layer 3 message to the data backup center 300, and receive the CN node information returned by the data backup center 300, and route the received initial layer 3 message to the CN node.
  • the node determining unit 310 may include: an information transceiving unit 311 and a node selecting unit 312.
  • the information transceiving unit 311 is configured to receive the IMSI from the message distribution device 210, forward the received IMSI to the node selection unit 312, and receive the CN node information returned by the node selection unit 312, and send the received CN node information. Giving a message distribution device 210;
  • the node selection unit 312 is configured to determine whether there is a CN node corresponding to the received IMSI by searching the correspondence between the IMSI and the CN node saved in the data holding unit 320, if there is a corresponding CN node and the signaling point of the CN node If the information is reachable, the CN node information is returned to the information transceiver unit 212; if there is a corresponding CN node but the signaling point of the CN node is unreachable, or it is determined that there is no corresponding CN node, then a signaling is selected from the pool.
  • the point-accessible CN node returns the selected CN node information to the information transceiving unit 212, and stores the correspondence between the received IMSI and the selected CN node in the data holding unit 320.
  • the CN node may be further used to pass the information that the user has successfully registered or the user is deleted.
  • the data backup center may further include: a data update unit, configured to update the user data saved in the data storage unit after receiving the notification of the CN node.
  • the data updating unit may be further configured to separately set a timer for each user data saved in the data saving unit, and if the user data corresponding to the timer is not performed within the timer protection time, that is, within the timer setting time, In any operation, the user data saved in the data holding unit is deleted after the timer expires.
  • the data backup center can be an independent physical device or a functional component in the CN node.
  • the CN node is the MSC and the message distribution device is the BSC.
  • the CN node is the MSC Server.
  • the message distribution device is a BSC or an MGW.
  • FIG. 9 shows a schematic diagram of a CDMA A-Flex network architecture using a primary and backup data backup center. The data of the primary data backup center 350 and the standby data backup center 360 need to be synchronized.
  • all the message distribution devices in the pool determine the route of the user message according to the information held in the data backup center, and can avoid the inconsistency of the routing information maintained by each message distribution device in the prior art.
  • the resulting user service CN node changes, thereby reducing the number of interoffice location updates.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un système et un appareil pour déterminer la route dans un réseau à accès multiple par répartition en code (CDMA). Le procédé comprend: après que le dispositif de distribution de message a reçu le message de couche 3 initial envoyé par un utilisateur, sélectionner un nœud CN sur la base du IMSI porté dans le message de couche 3 initial et la correspondance des IMSI stockée dans un centre de sauvegarde de données aux nœuds CN, et acheminer le message de couche 3 initial vers le nœud CN sélectionné. En outre, la présente invention concerne un système pour déterminer la route, un centre de sauvegarde de données et un dispositif de distribution de message. Avec la solution de la présente invention, il est possible de réduire le nombre de mises à jour de localisation inter-office.
PCT/CN2008/071210 2007-06-08 2008-06-05 Procédé, système et appareil pour déterminer la route dans un réseau à accès multiple par répartition en code WO2008151554A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2007101109232A CN101321379A (zh) 2007-06-08 2007-06-08 CDMA A-Flex网络中确定路由的方法、***及装置
CN200710110923.2 2007-06-08

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WO2008151554A1 true WO2008151554A1 (fr) 2008-12-18

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101472294B (zh) * 2007-12-28 2010-12-08 华为技术有限公司 Flex组网下建立连接的方法、寻呼方法、信令处理实体及网络***
CN101860474B (zh) * 2009-04-08 2015-07-22 中兴通讯股份有限公司 基于对等网络的资源信息处理方法及对等网络
CN101895913B (zh) * 2009-05-19 2012-10-31 ***通信集团公司 用户数据备份与获取方法、***及装置
WO2011022873A1 (fr) * 2009-08-25 2011-03-03 Huawei Technologies Co., Ltd. Technique d'acheminement d'un signal dans un réseau de communication

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US20030227899A1 (en) * 2002-06-11 2003-12-11 Mccann Thomas Matthew Methods and systems for automatically provisioning address translation information in a mobile services node address translation database
US20060234709A1 (en) * 2005-03-30 2006-10-19 Nokia Corporation System, devices, methods and programs for reducing service interruption during routing area change
CN1882117A (zh) * 2005-09-23 2006-12-20 华为技术有限公司 Cdma2000中基站控制器多归属方法、装置及网络

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20030227899A1 (en) * 2002-06-11 2003-12-11 Mccann Thomas Matthew Methods and systems for automatically provisioning address translation information in a mobile services node address translation database
US20060234709A1 (en) * 2005-03-30 2006-10-19 Nokia Corporation System, devices, methods and programs for reducing service interruption during routing area change
CN1882117A (zh) * 2005-09-23 2006-12-20 华为技术有限公司 Cdma2000中基站控制器多归属方法、装置及网络

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