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WO2009059528A1 - Procédé, système et appareil permettant de sélectionner un noeud de réseau central - Google Patents

Procédé, système et appareil permettant de sélectionner un noeud de réseau central Download PDF

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Publication number
WO2009059528A1
WO2009059528A1 PCT/CN2008/072853 CN2008072853W WO2009059528A1 WO 2009059528 A1 WO2009059528 A1 WO 2009059528A1 CN 2008072853 W CN2008072853 W CN 2008072853W WO 2009059528 A1 WO2009059528 A1 WO 2009059528A1
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WO
WIPO (PCT)
Prior art keywords
core network
resource information
network node
current
mobile switching
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2008/072853
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English (en)
Chinese (zh)
Inventor
Chunliang Liu
Fei Zeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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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 WO2009059528A1 publication Critical patent/WO2009059528A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method, system and apparatus for selecting a core network node.
  • the core network (Core Network, CN) is a network element that provides core switching and call routing functions, and includes a number of nodes that implement different functions, such as a Mobile Switch Center (MSC), a Gateway (Media Gateway, MGW), and a home network. Home Location Register (HLR), etc.
  • MSC Mobile Switch Center
  • MGW Gateway
  • HLR Home Location Register
  • MSC Pool In the Third Generation Partnership Project (The 3 rd Partnership Project, 3GPP ) of the relevant agreements, the concept of MSC Pool (Pool) is. Specifically, in an MSC Pool, multiple MSCs operate in parallel to share the services in the MSC Pool. This MSC Pool can be referred to as a CN node group.
  • FIG. 1 shows a network structure diagram including an MSC Pool in the prior art.
  • some nodes such as a base station, an HLR, and the like are omitted in the figure.
  • Figure 1 illustrates an example in which three MSCs are included in the network, including three MGWs, three radio network controllers (RNCs), a base station controller (BSC), and an MSC pool. Any MGW can be connected to each MSC in the MSC Pool, and any RNC/BSC can be connected to each MGW.
  • the core network side includes an MSC and an MGW
  • the radio access network (RAN) side includes a radio network controller (RNC) or a base station controller (BSC).
  • RNC radio network controller
  • BSC base station controller
  • the CN node capacity is configured on each CN node.
  • the capacity of MSC1, MSC2, and MSC3 is 2k, 3k, and 5k.
  • the user equipment initiates an access request message to the RAN, where the message includes a Network Resource Identifier (NRI) of the CN node address, and the RAN parses the access request message. Finding the corresponding MSC in the MSC Pool and routing the access request to the corresponding MSC. If the CN node address in the access request message is not available If the NRI is configured to be derivable, or if no NRI is successfully derived from the access request message, a CN node will be selected for the UE through the Node Selection Function (NAS). If the MSC in the MSC Pool is selected, the MSC that the UE selects is selected according to the proportion of the number of bearable users configured by each MSC.
  • NRI Network Resource Identifier
  • MSC1 2 of the 10 users are allocated to MSC1, 3 are assigned to MSC2, and 5 are assigned to MSC3, that is, according to each MSC
  • MSC3 3 of the 10 users are allocated to MSC1
  • MSC2 3 are assigned to MSC2
  • MSC3 3 are assigned to MSC2
  • MSC3 3 is assigned to MSC3
  • the allocation of the foregoing MSC may be implemented by the MGW or by the RNC/BSC.
  • the node selection function can only be provided according to the configured CN node capacity, which may result in unbalanced load of each CN node, and may even cause partial CN nodes to be overloaded.
  • Embodiments of the present invention provide a method, system, and apparatus for selecting a core network node to implement load balancing of a core network node.
  • An embodiment of the present invention provides a method for selecting a core network node, including:
  • the node selection device allocates the accessed core network node to the mobile terminal according to the current available capacity ratio of the core network node.
  • An embodiment of the present invention provides a system for selecting a core network node, including at least one core network node, and a node selection device, where
  • a core network node configured to deliver current resource information
  • a node selection device configured to receive current resource information of a core network node, where the current resource information includes a current available capacity or a current load, and when the resource information is a current load, converting the load into a current available capacity; and receiving The mobile terminal accesses the request of the core network node, and according to the current available capacity of the core network node, allocates the accessed core network node to the mobile terminal requesting access to the core network node according to the current available capacity ratio.
  • An embodiment of the present invention provides a node selection device for selecting a core network node, including an access request receiving unit, and an access allocation unit, where
  • An access request receiving unit configured to receive a request for the mobile terminal to access the core network node;
  • the access allocation unit is configured to allocate the accessed core network node to the mobile terminal according to the current available capacity ratio of the core network node.
  • An embodiment of the present invention provides a core network node, including a sending unit, and an access unit, where the sending unit is configured to send current resource information;
  • An access unit configured to provide mobile terminal access.
  • the CN node that requests access to the CN node allocates the accessed CN node according to the current available capacity ratio according to the current available capacity of the CN node, so that the load of the CN node can be balanced.
  • FIG. 1 is a network structure diagram of a mobile switching center pool in the prior art
  • Figure 3 is a flow chart of a complete embodiment of the method of the present invention.
  • FIG. 4 is a block diagram of an embodiment of a system of the present invention.
  • FIG. 5 is a block diagram of an embodiment of the apparatus of the present invention.
  • Figure 6 is another block diagram of an embodiment of the apparatus of the present invention.
  • the node selection function can only be provided according to the configured CN node capacity, but the current number of users of each CN node is constantly changing.
  • the CN node load is not balanced, and may even cause some CN nodes to be overloaded.
  • the users can be distributed according to the proportion of each MSC configuration, that is, distributed to MSC1, MSC2 and MSC3 according to the ratio of 2:3:5.
  • the load of each MSC is unbalanced, that is, the load of MSC3 may be high and the load of MSC1 and MSC2 is relatively high. Low, severely causes MSC3 to overload.
  • Embodiments of the present invention provide a method, system, and apparatus for selecting a core network node to implement load balancing of a core network node.
  • Step 201 Receive a request for the mobile terminal to access the core network node.
  • Step 202 Allocate an access core network node to the mobile terminal according to a current available capacity ratio of the core network node.
  • the step of receiving the request of the mobile terminal to access the core network node may further include the step of: receiving current resource information delivered by the core network node.
  • the core network node here is the MSC in the MSC Pool.
  • the core network node selected for the mobile terminal can be implemented by the MGW or by the RNC/BSC. Therefore, in this step, the MSC that is selected for the mobile terminal to access may be implemented by the MGW or the RNC/BSC.
  • the step of receiving the current resource information delivered by the core network node includes:
  • Each MSC in the MSC Pool sends a message containing its current resource information to the MGW or RNC/BSC.
  • each MSC may be required to send the current resource information at the same time.
  • each MSC may also be required to send its current resource information at the same time.
  • each MSC may be required to send its current resource information within a predetermined time period, and the predetermined time period may be a time period starting from an absolute time, which is referred to as a first time period, for example, each MSC is at 10:00. Send the respective current resource information within 5 minutes from the beginning. In this way, the resource information delivered by each MSC as much as possible at the same time can be guaranteed, so as to provide a reliable basis for the subsequent selection of the MSC.
  • each MSC in the MSC Pool may also send a message containing the current current resource information to the MGW or the RNC/BSC according to a predetermined period. In this way, the current resource information of each MSC in the MSC Pool is periodically updated to further ensure the equalization of the MSC resources in the MSC Pool.
  • the sending a message including the current resource information may be sent by using an M3UA link between the MSC and the MGW.
  • M3UA is Signaling System 7, SS7 messaging
  • MTP3 user adaptation layer protocol is used to implement interworking between SS7 and Internet Protocol (IP) and to carry MTP3 user messages on the IP network.
  • M2UA is the SS7 messaging part MTP2 adaptation layer protocol, which is used to implement SS7 and IP interworking and to carry SS7 messages on the IP network.
  • the resource information message can be implemented by extending a Service Indicator (SI).
  • SI Service Indicator
  • the resource information can be represented by SI in the extended data (data) message.
  • the message content includes the identifier of the CN node and the current resource information.
  • the extension of SI to 7 indicates that the resource message is mainly because the current SI 7 message between the MSC and the MGW is not applied and does not cause a collision. It is also possible to extend the Signaling Connection Control Part (SCCP) or the Base Station System Application Part (BSSAP) to represent resource information. The reason is similar to the previous one.
  • SCCP Signaling Connection Control Part
  • BSSAP Base Station System Application Part
  • the sending a message containing the current resource information may also be sent through the H.248 link.
  • the H.248 protocol is a media gateway control protocol.
  • the ServiceChangeInfo package in the ServiceChangeDescriptor is extended to carry the currently available capacity message.
  • the current resource information is the currently available capacity, it can be calculated from the total capacity and the current CPU usage of the MSC. Specifically, it can be calculated according to the following formula:
  • the mobile terminal that requests access to the core network node allocates the accessed core network section according to the current available capacity ratio. Point; when the resource information is the current load, the load is converted into the current available capacity, and the mobile terminal requesting access to the core network node is allocated according to the current available capacity according to the current available capacity of the core network node. node.
  • the mobile terminal requesting access to the MSC allocates the accessed MSC according to the current available capacity ratio; when the MGW or When the resource information received by the RNC/BSC is the current load, the load is converted into the current available capacity. According to the current available capacity of the MSC, the mobile terminal requesting access to the MSC allocates the accessed MSC according to the current available capacity ratio.
  • the current load may be the aforementioned CPU usage.
  • a second time period may be set in the MGW or the RNC/BSC, and each time is received in the second time period.
  • the resource information sent by the MSC is that each MSC sends the current resource information at the same time, so the accessed MSC can be allocated according to the current available capacity ratio.
  • the first time period and the second time period can be used in combination. For example, if the first time period is set to 5 minutes, each MSC sends its current resource information within 5 minutes starting from 10:00; the second time period is set to 3 minutes, when the MGW receives the first time.
  • the current resource information of a certain MSC is started, the resource information sent by each MSC is received within 3 minutes from the start of the counting, and it is considered that each MSC sends the current resource information at the same time, so that it can be currently available.
  • the capacity ratio is allocated to the connected MSC. In this way, the resource information delivered by each MSC as much as possible at the same time can be guaranteed, so as to provide a reliable basis for the subsequent selection of the MSC.
  • the step may be that the MGW receives the current occupancy rate of the CPU and receives the current CPU usage.
  • the rate is then converted to the current available capacity of the MSC, thereby allocating the accessed MSC to the UE according to the current available capacity ratio.
  • the current available capacity can be obtained by multiplying the total capacity of the MSC by the conversion factor in Table 1 above.
  • the embodiment is not limited to the selection of the MSC. As long as the same type of CN nodes operate in parallel and share the same services, the method of the embodiment can be used.
  • Step 301 The MSC1 in the MSC Pool converts its first CPU usage to the first current available capacity, and sets the total capacity of the MSC1 to 10k, and the first CPU occupancy rate is 74% (corresponding to a conversion factor of 0.2).
  • Step 303 The MSC1 and the MSC2 in the MSC Pool send messages containing the respective currently available capacity to the MGW according to the same predetermined period from the same scheduled time.
  • the message is sent through the extended data message on the M3UA link.
  • the data message has a SI of 7 indicating the available capacity message, and the message content includes the currently available capacity of the MSC.
  • Step 304 The MGW receives the current available capacity of the MSC1 and the MSC2, and allocates the mobile terminal to the MSC1 and the MSC2 for the mobile terminal according to the ratio of 2:3 (ie, 2k: 3k).
  • the mobile terminal requesting access to the CN node allocates the accessed CN node according to the current available capacity ratio, so that Balance the load of the CN node.
  • MSCs There are two MSCs in the Pool, including:
  • Step A In the MSC Pool, MSC1 and MSC2 respectively send messages containing their respective CPU usage rates to the RNC/BSC according to the same predetermined period from the same scheduled time.
  • the MSC1 corresponds to the first CPU usage
  • the MSC2 corresponds to the second CPU usage
  • the message can be sent through the extended data message on the M2UA link.
  • Step B The RNC/BSC obtains the first current available capacity of the MSC1 by using the received first CPU usage of the MSC1, and obtains the second current available capacity of the MSC2 by using the received second CPU usage of the MSC2.
  • Step C The RNC/BSC allocates the mobile terminal to the MSC1 and the MSC2 for the mobile terminal according to the ratio of 2:3 (i.e., 2k: 3k).
  • FIG. 4 is a block diagram of an embodiment of the system, as shown in the figure, including at least one core network node 401, a node selection device 402, wherein
  • the core network node 401 is configured to send current resource information.
  • the node selection device 402 is configured to receive current resource information delivered by the core network node 401, where the current resource information includes a current available capacity or a current load, and when the resource information is a current load, the load is converted into a current available capacity. And receiving the request of the mobile terminal to access the core network node, and according to the current available capacity of the core network node 401, the mobile terminal requesting access to the core network node 401 allocates the accessed core network node 401 according to the current available capacity ratio.
  • the node selection device 402 can be a gateway or a radio network controller/base station controller.
  • the core network node 401 can be a mobile switching center in a pool of mobile switching centers.
  • the method for selecting an access network node by using the system embodiment is similar to the previous method, and details are not described herein again.
  • FIG. 5 is a block diagram showing an embodiment of the apparatus.
  • a node selection device for selecting a core network node includes an access request receiving unit 501 and an access allocation unit 502.
  • the access request receiving unit 501 is configured to receive a request for the mobile terminal to access the core network node, and the access allocation unit 502 is configured to allocate the accessed core network node according to the current available capacity ratio of the core network node.
  • the resource information receiving unit 503 is further configured to receive current resource information delivered by the core network node.
  • the current resource information includes a current available capacity or a current load.
  • the mobile terminal requesting access to the core network node allocates the accessed core network node according to the current available capacity ratio according to the current available capacity of the core network node.
  • the device When the resource information is the current load, the device further includes a conversion unit (not shown) for converting the load to the current available capacity.
  • the access allocation unit 502 can be based on the core network node
  • the currently available capacity is allocated to the mobile network terminal that accesses the core network node according to the current available capacity ratio.
  • the resource information receiving unit 503 can receive the current resource information delivered by the core network node through the M3UA link, or the M2UA link, or the H248 link.
  • the resource information receiving unit 503 receives the SI transmission by the core network node through the extended data message, or by extending the SCCP transmission, or by extending the current resource information transmitted by the BSSAP.
  • the apparatus may further include a second time period timing unit 601. As shown in FIG. 6, the control resource information receiving unit 503 receives the mobile switching center in the mobile switching center pool for delivery in a predetermined second time period. Current resource information.
  • the device can be located in the MGW or RNC/BSC.
  • the method for selecting an access network node by using the device embodiment is similar to the previous method, and details are not described herein again.
  • An access unit configured to provide mobile terminal access.
  • the current resource information delivered by the sending unit includes the current available capacity or current load of the core network node.
  • the core network node is a mobile switching center in a pool of mobile switching centers.
  • the current resource information delivered by the CN node is received, and when the resource information received by the resource information receiving unit is the currently available capacity, according to the current available capacity of the core network node, the core network node is requested to access.
  • the mobile terminal allocates the accessed core network node according to the current available capacity ratio; when the resource information is the current load, the load is converted into the current available capacity, and the core network node is requested to access the core network node according to the current available capacity of the core network node.
  • the mobile terminal allocates the accessed core network node according to the current available capacity ratio, so that the load of the CN node can be balanced.
  • the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product in essence or in the form of a software product, which can be stored in a storage medium such as a ROM/RAM or a disk. , CD, etc., including a number of instructions to make a computer device (can be a personal computer, server, Or a network device or the like) performs the methods described in various embodiments of the present invention or in certain portions of the embodiments. While the invention has been described by the embodiments of the present invention, it will be understood that

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (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 permettant de sélectionner un noeud de réseau central. Le procédé selon l'invention consiste à : recevoir une demande de terminal mobile demandant l'accès à un noeud de réseau central; et faire en sorte qu'un appareil de sélection de noeud distribue, au terminal mobile, l'accès audit noeud de réseau central, en fonction de la capacité disponible du moment du noeud de réseau central. L'invention concerne un système et un appareil permettant de sélectionner un noeud de réseau central. La solution proposée par l'invention permet d'équilibrer la charge du noeud de réseau central.
PCT/CN2008/072853 2007-10-31 2008-10-28 Procédé, système et appareil permettant de sélectionner un noeud de réseau central Ceased WO2009059528A1 (fr)

Applications Claiming Priority (2)

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CN200710166418.X 2007-10-31
CNA200710166418XA CN101426245A (zh) 2007-10-31 2007-10-31 选择核心网节点的方法、系统和装置

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CN101895932B (zh) * 2009-05-19 2013-01-23 中国移动通信集团公司 负载转移方法、系统及负载转移装置
CN101925123B (zh) * 2009-06-12 2012-12-12 中国移动通信集团设计院有限公司 一种实现区域池中负荷均衡的方法、系统及相关功能实体
CN101998517B (zh) * 2009-08-18 2013-08-21 中国移动通信集团上海有限公司 应用于混合组网的业务处理系统、方法及相关装置
US8751638B2 (en) * 2010-07-02 2014-06-10 Futurewei Technologies, Inc. System and method to implement joint server selection and path selection
CN102438277A (zh) * 2010-09-29 2012-05-02 中兴通讯股份有限公司 一种终端接入方法及系统
CN102469556A (zh) * 2010-11-08 2012-05-23 中兴通讯股份有限公司 无线资源控制过程中传输机器类型通讯标识的方法和系统
CN107154953A (zh) * 2016-03-03 2017-09-12 阿里巴巴集团控股有限公司 资源提供方法和装置
CN111629404B (zh) * 2019-02-27 2022-06-10 华为技术有限公司 一种通信方法及装置

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