WO2009100677A1 - 基于小型蜂窝接入网络的通信方法及设备 - Google Patents

基于小型蜂窝接入网络的通信方法及设备 Download PDF

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Publication number
WO2009100677A1
WO2009100677A1 PCT/CN2009/070386 CN2009070386W WO2009100677A1 WO 2009100677 A1 WO2009100677 A1 WO 2009100677A1 CN 2009070386 W CN2009070386 W CN 2009070386W WO 2009100677 A1 WO2009100677 A1 WO 2009100677A1
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Prior art keywords
information
access network
small cell
cell
access point
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PCT/CN2009/070386
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English (en)
French (fr)
Inventor
Qingshun Liu
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to JP2010546205A priority Critical patent/JP5186011B2/ja
Publication of WO2009100677A1 publication Critical patent/WO2009100677A1/zh
Priority to IN3079KON2010 priority patent/IN2010KN03079A/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/12Interfaces between hierarchically different network devices between access points and access point controllers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/045Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/14Interfaces between hierarchically different network devices between access point controllers and backbone network device

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method and device based on a small cellular access network.
  • Code Division Multiple Access 2000 (CDMA2000) technology is one of the main wireless access technologies used in the third generation of mobile communication.
  • the specific network architecture is shown in Figure 1. In this network architecture, it mainly passes A base station system (BTS), a base station controller (BSC), and a mobile switching center (MSC) provide wireless communication services for mobile stations (MSs).
  • BTS base station system
  • BSC base station controller
  • MSC mobile switching center
  • Femto network a small cellular access network
  • AP home access point
  • xDSL digital subscriber line
  • Internet Internet
  • the cell technology is compatible with existing terminal devices for effective indoor coverage.
  • HGW home gateway
  • FGW internet and micro gateway
  • Gateway Communicates with the core network (such as CDMA networks, etc.).
  • the core network such as CDMA networks, etc.
  • Embodiments of the present invention provide a communication method and device based on a small cell access network, so that the FAP can reliably access the core network to provide communication services for the terminal device.
  • a communication method based on a small cellular access network comprising:
  • the UA is connected, and the information is transmitted between the small cell access network gateway and the mobile switching center of the core network through the established two-stage SUA connection, and between the small cell access network gateway and the small cell access network access point. .
  • a small cellular access network gateway including:
  • a connection establishing unit configured to establish signaling connection control between a small cellular access network gateway and a mobile switching center of a core network, and between a small cellular access network gateway and a small cellular access network access point Partial user adaptation layer SUA connection;
  • the first information transfer unit is configured to connect the two segments of the SUA established by the connection establishing unit between the small cell access network gateway and the mobile switching center of the core network, and the small cell access network gateway and the small cell Information is transmitted between access network access points.
  • a communication method based on a small cellular access network comprising:
  • the small cell access network gateway performs information transmission between the mobile switching center of the core network and the access point of the small cell access network according to the information of the configured logical cell, wherein, in the information of the configured logical cell , a logical cell includes at least one small cellular access network access point.
  • a communication device based on a small cellular access network comprising:
  • a configuration information holding unit configured to save information of a pre-configured logical cell, and in the configured information of the logical cell, one logical cell includes one or more small cellular access network access points;
  • the second information delivery unit is configured to perform information transmission between the mobile switching center of the core network and the access point of the small cell access network according to the information of the logical cell saved by the configuration information holding unit.
  • FIG. 1 is a schematic diagram of a CDMA2000 network architecture in the prior art
  • FIG. 2 is a schematic diagram of a Femto network architecture in the prior art
  • FIG. 3 is a schematic diagram of a SUA connection protocol stack according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a SUA connection establishment process of a location registration system according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a SUA connection establishment process in a call process according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a location registration process according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a start call process according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a called process according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a handover process according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a location service implementation process according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of an FGW according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • a two-stage signaling connection control part user adaptation layer is established between the FAP and the MSC.
  • One segment is located between the FAP and the FGW, and the other segment is located between the FGW and the MSC. Only the SUA information of the FGW needs to be configured on the MSC. After that, information can be transmitted between the small cell access network gateway and the mobile switching center of the core network and the small cell access network access point through the established two-stage SUA connection.
  • the small cell access network gateway receives the establishment of the SUA connection from the small cell access network access point.
  • the cell identifier in the information may be modified into a logical cell identifier corresponding to the access point of the small cell access network, and the modified information is sent to the mobile switching center of the core network to establish a corresponding SUA connection.
  • the FAP can use the standard Alp (IP-based A1 interface) / A2p (IP-based A2 interface) interface to communicate with the FG W, and the FGW implements the aggregation processing of the Alp/A2p interface.
  • the core network is accessed using a standard Alp/A2p interface.
  • the A1/A2 interface is an interface between the MSC and the BSC in the core network.
  • the implementation of the Femto network does not require extensive modification of the core network element that has been constructed, and the deployment of the Femto network is effectively prevented from having a great impact on the core network, thereby making the corresponding Femto network have good scalability.
  • the aggregation function of the Alp/A2p interface by the FGW and the Alp letter between the FAP and the MSC may be specifically selected.
  • the message can be carried over two SUA connections, which are the SUA connection between the FAP and the FGW and the SUA connection between the FGW and the MSC, and the corresponding protocol stack is as shown in FIG. 3, that is, the processing of the SU A information is implemented on the FGW. So that the MSC in the core network only configures the FGW as a normal BSC without configuring any information of each FAP under the FGW.
  • SUA Stream Control Transmission Protocol
  • SCTP Stream Control Transmission
  • IP IP protocol stacks used by the Alp interface.
  • the SUA connection establishment process of the location registration method provided by the embodiment of the present invention is as shown in FIG. 4, and includes:
  • the FGW after receiving the SUA connection request message, the FGW sends a SU to the MSC.
  • a Connection Request message the message carries the A interface message Complete Layer 3 Info
  • the SUA connection establishment process of the call setup provided by the embodiment of the present invention is as shown in FIG. 5, and includes:
  • the message carries the A interface message Complete Layer 3
  • the FGW after receiving the SUA connection request message, the FGW sends a SUA Connection to the MSC.
  • the message carries the A interface message Complete Layer 3 Info
  • FGW sends SUA Connection to FAP
  • the small cell access network gateway may perform information transmission between the mobile switching center of the core network and the small cell access network access point according to the information of the configured logical cell, where In the information of the logical cell, one logical cell includes one or more small cellular access network access points, that is, one logical cell may include only one small cellular access network access point, or may also include multiple small cellular connections.
  • each logical cell may be configured to include multiple small cell access network access points, or may be configured to include multiple small cells in each logical cell.
  • the cellular access network access point, and the remaining logical cells contain only one small cellular access network access point.
  • a set of logical cells may be planned for a small cell access network (ie, a Femto network) such that a small cell access network access point corresponds to an actual cell identity and a logical cell identity, respectively, and the FGW completes the FAP and the FGW.
  • the mapping operation of the logical cell identifier is used to replace the cell identifier in the information such as the A-interface message between the FGW and the MSC (that is, the actual cell identifier corresponding to the FAP before the replacement of the cell identifier) is the logical cell identifier corresponding to the FAP.
  • the Femto network does not assign a unique cell identifier to each FAP (that is, the actual cell identifier corresponding to the FAP is not allocated), the logical cell identifier is directly used.
  • the operation ie, the cell identifiers of multiple FAPs may be the same) does not need to perform the operation of replacing the cell identifier in the information such as the A interface message with the logical cell identifier on the FGW.
  • the cell identifier in the information may be modified into a logical cell identifier corresponding to the access point of the small cell access network. And send the modified information to the mobile switching center of the core network.
  • the information of the logical cell needs to be configured in the MSC of the core network for processing the services of the Femto network.
  • the FGW also needs to record the registration FAP of the MS, and is used to forward the A interface connectionless message.
  • the small cellular access network gateway may be based on the information.
  • the destination user information determines the corresponding small cell access network access point, and the correspondence between the user information and the small cell access network access point is recorded in the process of the location registration process or the initial call process or the called process.
  • the small cell accesses the network gateway; after that, the received information can be sent to the corresponding small cell access network access point, or the corresponding small cell access network access point and its corresponding Adjacent small cellular access network access points send the received information to enable the delivery of connectionless messages.
  • the FAP for implementing the BTS and the BSC functions has a smaller coverage and a smaller number of users, so usually only one cell needs to be configured for one FAP. Considering that the number of cells that each MSC can support in the core network is limited, for this purpose, multiple FAPs can be configured to use the same cell identity CELL.
  • the logical cell is used by the Femto network, and the corresponding correspondence is shown in Table 1:
  • the corresponding MSC in the macro network also needs to configure the above logical cell identifier, and each logical cell belongs to the BSC corresponding to the FGW.
  • the process of implementing location registration based on the information recorded in Table 1 includes:
  • Step 1-4 FAP receives the registration message of MS Registration Message, Constructs Complete Layer
  • the layer 3 information element in the Info message is Location Updating
  • the ID is changed to the CELL of the logical cell corresponding to the FAP.
  • the ID that is, the logical cell identifier corresponding to the FAP recorded on the FGW, is sent to the MSC, and the MSC updates the location information of the MS and returns a Location Updating Accept message.
  • Step 5-7 FGW receives location registration acceptance Location Updating
  • the Accept message records the registration of the MS as the location information of the MS, and forwards the Location Updating Accept message to the corresponding FAP, and the corresponding FAP receives the Location Updating.
  • the registration accept command Registration Accept Order message is sent to the MS.
  • the correspondence between the MS identifier and the registered FAP is recorded on the FGW for forwarding the connectionless message, and the corresponding relationship may be as shown in Table 2:
  • Step 1-3 the FAP receives the start message of the MS Origination Message, constructs Complete L3
  • Layer 3 information element in the Info message is CM Service
  • FGW connection management service request
  • FGW receives Complete L3 Info: CM Service Request message, will be CELL in Complete Layer 3 Info
  • the ID is changed to the CELL of the logical cell corresponding to the FAP.
  • Step 4-8 establishing a corresponding SUA connection between the FGW and the FAP, the FGW, and the MSC, and the subsequent fingerprints have requested the Assignment Request message, and the finger has completed the Assignment.
  • the Complete message and the Release message are forwarded through the established SUA connection.
  • the IP addresses of the FAP and FGW, and the corresponding FGW is only responsible for forwarding routes.
  • Step 1-3 the FGW receives the paging request Paging from the MSC. After the request message, the Paging Request message is sent to the corresponding F AP according to the registered FAP of the recorded MS (refer to the information in Table 2), and the paging message Page Message is sent by the FAP to each MS in the local area;
  • the corresponding paging range may also be expanded according to the location information of the registered FAP, that is, the paging range includes one or more adjacent FAPs;
  • connectionless messages such as short messages
  • Paging For other connectionless messages, such as short messages, the corresponding forwarding processing method and Paging
  • the forwarding of the Request message is similar.
  • Step 4 After the paged MS receives the corresponding Page Message, it returns a page response page to the FAP.
  • the process of switching from a small cellular access network to a core network includes:
  • Step 1-4 FAP sends handover request to FGW Handoff
  • the Required message includes a core network (such as a CDMA network, etc., which may also be referred to as a macro network) in the corresponding message, and a cell list (ie, a target cell list), where the FAP corresponds to a certain core network cell, and the FGW receives the corresponding Handoff
  • the message is forwarded to the MSC, and the MSC exchanges with the BSC in the switched core network to implement corresponding handover processing;
  • FGW can specifically put Handoff
  • the Required message is forwarded to the corresponding MSC through the established SUA connection.
  • Step 7-11 after the MSC receives the handover from the BSC in the core network, Handoff is completed.
  • the clear command is sent to the FGW through the corresponding SUA connection.
  • Command message (ie release message), and send Clear to FAP by FGW a Command message to release the corresponding resources on the FGW and the FAP; after completing the corresponding resource release process, the FAP sends a clear to the FGW to complete Clear.
  • the implementation process of the location service for calculating the information provided by the BSC is as shown in FIG. 10, that is, the corresponding location service processing procedure after the establishment of the corresponding SUA connection includes:
  • Steps 1, 2, MSC sends location measurement request to FGW Radio Measurements for Position
  • the message carries the GPS location information of the FAP, and the corresponding radio is used by the FGW.
  • the Bay IjFGW can also directly return the R adio Measurements for Position to the MSC.
  • the response message in this case, the corresponding step 2 and step 3 can be omitted; and if the FGW can know the GPS location information of the corresponding FAP in advance (for example, the GPS location information of the FAP can be reported to the FGW after the FAP is powered on), Therefore, the FGW is required to judge the type of the received A interface message because it needs to directly respond to the location measurement request message.
  • the ID performs a differentiated charging process, so that the charging operation for the small cell access network can be realized.
  • the embodiment of the present invention further provides a small cellular access network gateway, and the specific implementation structure thereof is shown in FIG. 11, and mainly includes the following units:
  • connection establishing unit 11 is configured to establish a signaling connection control part user adaptation layer between the small cell access network gateway and the mobile switching center of the core network, and the small cell access network access point respectively S UA connection;
  • the first information transfer unit 12 is configured to connect the two SUA connections established by the connection establishing unit 11 Information is transmitted between the cellular access network gateway and the mobile switching center of the core network, and between the small cellular access network access points.
  • the device may further include:
  • the cell identifier modification unit 13 is configured to modify the cell identifier in the information to be small after the small cell access network gateway receives the information (such as the A interface message) sent by the small cell access network access point.
  • the cellular access network corresponds to the logical cell identifier, and the modified information is transmitted to the first information delivery unit 12 for transmission.
  • the embodiment of the present invention further provides another communication device based on a small cell access network, and the specific implementation structure is as shown in FIG. 12, and may mainly include the following units:
  • the configuration information holding unit 21 is configured to save information of the pre-configured logical cell, and in the information of the configured logical cell, one logical cell includes one or more small cellular access network access points, that is, one logic
  • the cell may include only one small cell access network access point, or may also include multiple small cell access network access points; for example, on the FGW, each logical cell may be configured to include multiple small cell accesses.
  • the network access point may be configured such that each logical cell in the partial logical cell includes multiple small cellular access network access points, and the remaining logical cells include only one small cellular access network access point;
  • the second information transmission unit 22 is configured to perform information transmission between the mobile switching center of the core network and the small cell access network access point according to the information of the logical cell held by the configuration information holding unit 21.
  • the corresponding second information delivery unit 22 may specifically include:
  • the cell identity modification unit 221 is configured to: after receiving the information sent by the access point of the small cell access network, modify the cell identity in the information to the small cell according to the information of the logical cell saved by the configuration information holding unit. Enter the logical cell identifier corresponding to the network access point;
  • the information sending unit 222 is configured to send, to the mobile switching center of the core network, the modified information of the cell identity modification unit.
  • the corresponding second information delivery unit may specifically include:
  • the access point determining unit 223 is configured to: after receiving the information sent by the mobile switching center of the core network, determine, according to the destination user information in the information, the corresponding small cell access network access point, where the user
  • the correspondence between the information and the small cell access network access point may specifically be in the location registration process or the initial call Recorded in the configuration information holding unit during the process of the process or the called process;
  • the information sending unit 222 is configured to send the received information to the corresponding small cell access network access point determined by the access point determining unit 223, or may also be the same to the corresponding small cell.
  • the access network access point and its neighboring small cellular access network access points transmit the received information.
  • the foregoing small cell access network-based communication device may be a small cell access network gateway, that is, an FGW, where the corresponding cell identity modification unit and the access point determining unit may also be configured at the same time. In the FGW to achieve the corresponding processing functions.
  • the two-stage SUA connection established by the FGW and the logical cell identifier provided by the FGW enable only corresponding pairs in the process of deploying the small cell access network (ie, the Femto network).
  • the macro network element can be configured to support various services supported by the core network, so that users can access various services through the Femto network to improve the user experience.
  • the Femto network may use a standard Alp/A2p interface to access the corresponding core network (ie, a macro network core network, such as a CDMA network, etc.) without modifying the standard Alp/A2p interface, thereby further Improve the scalable performance of the Femto network, which makes the Femto network have good scalability.
  • a standard Alp/A2p interface to access the corresponding core network (ie, a macro network core network, such as a CDMA network, etc.) without modifying the standard Alp/A2p interface, thereby further Improve the scalable performance of the Femto network, which makes the Femto network have good scalability.
  • the embodiment of the present invention may be implemented in the FGW, or may be implemented in other Fem to network devices except the FGW, or may be in a network device connected between the Femto network and the core network. Implementation, such as other network devices between the FAP and the MSC.

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Abstract

一种基于小型蜂窝接入网络的通信方法及设备,其主要是在小型蜂窝接入网络网关与核心网的移动交换中心之间,以及小型蜂窝接入网络网关与小型蜂窝接入网络接入点之间分别建立信令连接控制部分用户适配层SUA连接,通过建立的两段SUA连接在小型蜂窝接入网络网关与核心网的移动交换中心之间,以及与小型蜂窝接入网络接入点之间进行信息传递。还可以根据配置的逻辑小区的信息在核心网的移动交换中心与小型蜂窝接入网络接入点之间进行信息的传递。从而使得FAP能够可靠地接入核心网中为终端设备提供通信服务。

Description

基于小型蜂窝接入网络的通信方法及设备
[1] 本申请要求于 2008年 02月 15日提交中国专利局、 申请号为 200810057763.4、 发 明名称为"基于小型蜂窝接入网络的通信方法及设备"的中国专利申请的优先权, 其全部内容通过弓 I用结合在本申请中。
[2] 技术领域
[3] 本发明涉及通信技术领域, 尤其涉及一种基于小型蜂窝接入网络的通信方法及 设备。
[4] 发明背景
[5] 码分多址 2000 (CDMA2000) 技术是第三代移动通信主要釆用的无线接入技术 之一, 其具体釆用的网络架构如图 1所示, 在该网络架构中, 主要通过基站系统 (BTS) 、 基站控制器 (BSC) 及移动交换中心 (MSC) 等为移动台 (MS) 提 供无线通信服务。
[6] 在图 1所示的网络架构中, 由于大量的话务量发生在室内, 因此, 需要有效增 强室内覆盖。 目前, 提出了微小区 (Femto
cell) 的概念, 即提出了基于小型蜂窝接入网络 (称为 Femto网络) , 以使用家 庭接入点 (AP) 进行室内覆盖, 并使用数字用户线 (xDSL) 宽带网络或者互联 网 (Internet) 进行业务传输; 且相应的家庭 AP能够做到即插即用, 以减少传输 和网络规划成本。 通过 Femto
cell技术可以兼容现有的终端设备, 实现有效室内覆盖。
[7] Femto网络架构如图 2所示, 设置于家庭中的微接入点 (FAP, Femto Access
Point) 通过家庭网关 (HGW) 、 互联网及微网关 (FGW, Femto
Gateway) 与核心网 (如 CDMA网络等) 之间进行通信。
[8] 在实现本发明过程中, 发明人发现现有技术中至少存在如下问题:
[9] 在图 2所示的 Femto网络中, 由于 FAP数量巨大, 因此, 需要提供一种针对 FAP 的管理方案, 以及 FAP接入核心网的实现方案。 然而, 目前还没有一种技术方案 可以用于对大量的 FAP实现有效管理, 这样, 也就无法保证 FAP能够可靠地接入 核心网中为终端设备提供通信服务。
[10] 发明内容
[11] 本发明的实施例提供了一种基于小型蜂窝接入网络的通信方法及设备, 从而使 得 FAP能够可靠地接入核心网中为终端设备提供通信服务。
[12] 一种基于小型蜂窝接入网络的通信方法, 包括:
[13] 在小型蜂窝接入网络网关与核心网的移动交换中心之间, 以及小型蜂窝接入网 络网关与小型蜂窝接入网络接入点之间分别建立信令连接控制部分用户适配层 S
UA连接, 通过所述建立的两段 SUA连接在小型蜂窝接入网络网关与核心网的移 动交换中心之间, 以及小型蜂窝接入网络网关与小型蜂窝接入网络接入点之间 进行信息传递。
[14] 一种小型蜂窝接入网络网关, 包括:
[15] 连接建立单元, 用于在小型蜂窝接入网络网关与核心网的移动交换中心之间, 以及小型蜂窝接入网络网关与小型蜂窝接入网络接入点之间分别建立信令连接 控制部分用户适配层 SUA连接;
[16] 第一信息传递单元, 用于通过所述连接建立单元建立的两段 SUA连接在小型蜂 窝接入网络网关与核心网的移动交换中心之间, 以及小型蜂窝接入网络网关与 小型蜂窝接入网络接入点之间进行信息的传递。
[17] 一种基于小型蜂窝接入网络的通信方法, 包括:
[18] 小型蜂窝接入网络网关根据配置的逻辑小区的信息在核心网的移动交换中心与 小型蜂窝接入网络接入点之间进行信息传递, 其中, 在所述配置的逻辑小区的 信息中, 一个逻辑小区包含至少一个小型蜂窝接入网络接入点。
[19] 一种基于小型蜂窝接入网络的通信设备, 包括:
[20] 配置信息保存单元, 用于保存预先配置的逻辑小区的信息, 且在所述配置的逻 辑小区的信息中, 一个逻辑小区包含一个或多个小型蜂窝接入网络接入点;
[21] 第二信息传递单元, 用于根据所述配置信息保存单元保存的逻辑小区的信息在 核心网的移动交换中心与小型蜂窝接入网络接入点之间进行信息传递。
[22] 由上述本发明的实施例提供的技术方案可以看出, 其通过建立的两段 SUA连接 可以实现 FAP与 FGW之间, 以及 FGW与 MSC之间的可靠通信。 而且, 在 FGW上 还可以根据逻辑小区标识对大量的 FAP进行收敛管理, 从而进一步保证大量的 F AP均可以接入相应的核心网络中为终端设备用户提供各种业务服务。
[23] 附图简要说明
[24] 图 1为现有技术中的 CDMA2000网络架构示意图;
[25] 图 2为现有技术中的 Femto网络架构示意图;
[26] 图 3为本发明实施例提供的 SUA连接协议栈示意图;
[27] 图 4为本发明实施例提供的位置登记吋的 SUA连接建立过程示意图;
[28] 图 5为本发明实施例提供的呼叫过程中的 SUA连接建立过程示意图;
[29] 图 6为本发明实施例提供的位置登记过程示意图;
[30] 图 7为本发明实施例提供的始呼过程示意图;
[31] 图 8为本发明实施例提供的被呼过程示意图;
[32] 图 9为本发明实施例提供的切换过程示意图;
[33] 图 10为本发明实施例提供的位置业务实现过程示意图;
[34] 图 11为本发明实施例提供的 FGW结构示意图;
[35] 图 12为本发明实施例提供的通信设备的结构示意图。
[36] 实施本发明的方式
[37] 本发明实施例中, 在 FAP与 MSC之间建立两段的信令连接控制部分用户适配层
(SUA , Signaling Connection Control Part User Adaptation
Layer) 连接: 一段位于 FAP与 FGW之间, 另一段位于 FGW与 MSC之间, 在 MSC 上仅需要配置 FGW的 SUA信息。 之后, 则可以通过建立的两段 SUA连接在小型 蜂窝接入网络网关与核心网的移动交换中心之间, 以及与小型蜂窝接入网络接 入点之间进行信息的传递。
[38] 例如, 如果小型蜂窝接入网络接入点分别对应一个实际的小区标识和一个逻辑 小区标识, 小型蜂窝接入网络网关在接收到小型蜂窝接入网络接入点发来的建 立 SUA连接的请求信息后, 则可以将信息中的小区标识修改为小型蜂窝接入网 络接入点对应的逻辑小区标识, 并向核心网的移动交换中心发送修改后的信息 , 建立相应的 SUA连接。
[39] 为便于对本发明实施例的理解, 下面将结合附图对本发明实施例的具体实现过 程进行详细的说明。
[40] 由于 FAP用于室内覆盖, 因此, 网络中 FAP的数量非常庞大, 这就要求 Femto网 络应当具有良好的可扩展性, 以允许大量的 FAP接入。 本发明实施例中, FAP具 体可以釆用标准的 Alp (IP化后的 A1接口) /A2p (IP化后的 A2接口) 接口与 FG W通信, 并由 FGW实现 Alp/A2p接口的汇聚处理, 并使用标准的 Alp/A2p接口接 入核心网。 其中, A1/A2接口为核心网中的 MSC与 BSC之间的接口。 这样, 可以 使得 Femto网络的实现无需大量修改已经构建的核心网络网元, 有效避免 Femto 网络的部署对核心网络造成很大的影响, 进而使得相应的 Femto网络具有良好的 可扩展性。
[41] 为了实现针对核心网络中的 MSC屏蔽数量庞大的 FAP (相当于 BSC) , 本发明 实施例中, 具体可以选择由 FGW实现 Alp/A2p接口的汇聚功能, FAP和 MSC之间 的 Alp信令消息可以通过两段 SUA连接承载, 分别为 FAP与 FGW之间的 SUA连接 和 FGW与 MSC之间的 SUA连接, 相应的协议栈如图 3所示, 即在 FGW上实现 SU A信息的处理, 以使得核心网络中的 MSC仅将 FGW当成一个通常的 BSC进行配置 , 而无需配置 FGW下的各个 FAP的任何信息。
[42] 在图 3所述的信令协议栈中, 由于 FAP与 FGW之间通过公共互联网进行通信, 故需要使用相应的 IPsec (IP安全协议) 对传递的信息进行安全保护; 图 3中的互 操作规范 (IOS, Interoperability
Specification) 、 SUA、 流控制传输协议 (SCTP, Stream Control Transmission
Protocol) 、 IP均为 Alp接口釆用的标准协议栈。
[43] 基于图 3所示的协议栈, 本发明实施例提供的位置登记吋的 SUA连接建立处理 过程如图 4所示, 包括:
[44] 步骤 1、 2, FAP向 FGW发送 SUA连接请求 SUA Connection
Request消息, 在该消息中携带 A接口消息 Complete Layer 3
Info (完整的三层信息) , FGW接收到该 SUA连接请求消息后, 向 MSC发送 SU
A Connection Request消息, 消息中携带 A接口消息 Complete Layer 3 Info;
[45] 步骤 3、 4, MSC收到 SUA Connection
Request消息后, 由于 MSC返回位置更新应答消息后, 不再发送其它消息, 故无 需建立 SUA连接, 这样, MSC便可以向 FGW返回 SUA连接拒绝 SUA Connection Refused消息, FGW向 FAP发送 SUA Connection Refused消息。
[46] 基于图 3所示的协议栈, 本发明实施例提供的呼叫建立吋的 SUA连接建立处理 过程如图 5所示, 包括:
[47] 步骤 1、 2, FAP向 FGW发送 SUA Connection
Request消息, 消息中携带着 A接口消息 Complete Layer 3
Info, FGW接收到该 SUA连接请求消息后, 向 MSC发送 SUA Connection
Request消息, 消息中携带 A接口消息 Complete Layer 3 Info;
[48] 步骤 3、 4, MSC收到 SUA Connection
Request消息后, 向 FGW返回 SUA连接确认 SUA Connection
Acknowledge消息, FGW向 FAP发送 SUA Connection
Acknowledge消息, 从而建立两段 SUA连接, 即 MSC与 FGW之间的 SUA连接, 和 FGW与 FAP之间的 SUA连接, 通过相应的两段 SUA连接可以承载呼叫相关信令
[49] 本发明实施例中, 小型蜂窝接入网络网关可以根据配置的逻辑小区的信息在核 心网的移动交换中心与小型蜂窝接入网络接入点之间进行信息的传递, 其中, 配置的逻辑小区的信息中, 一个逻辑小区包含一个或多个小型蜂窝接入网络接 入点, 即一个逻辑小区可以仅包含一个小型蜂窝接入网络接入点, 或者, 也可 以包含多个小型蜂窝接入网络接入点; 例如, 在 FGW上, 可以设置各个逻辑小 区均包含有多个小型蜂窝接入网络接入点, 或者, 也可以设置为部分逻辑小区 中的各个逻辑小区包含有多个小型蜂窝接入网络接入点, 其余逻辑小区则仅包 含一个小型蜂窝接入网络接入点。
例如, 可以规划一组逻辑小区用于小型蜂窝接入网络 (即 Femto网络) , 使得 一个小型蜂窝接入网络接入点分别对应一个实际的小区标识和一个逻辑小区标 识, 并由 FGW完成 FAP和逻辑小区标识的映射操作, 以替换 FGW与 MSC之间 A 接口消息等信息中的小区标识 (即替换前的小区标识为 FAP对应的实际的小区标 识) 为 FAP对应的逻辑小区标识。 若 Femto网络没有为每个 FAP分配一个唯一的 小区标识 (即没有分配 FAP对应的实际的小区标识) , 而是直接使用逻辑小区标 识 (即多个 FAP的小区标识可以相同) , 则在 FGW上不需要执行将 A接口消息等 信息中的小区标识替换为逻辑小区标识的操作。
具体地, 在小型蜂窝接入网络网关接收到小型蜂窝接入网络接入点发来的信息 后, 则可以将信息中的小区标识修改为小型蜂窝接入网络接入点对应的逻辑小 区标识, 并向核心网的移动交换中心发送修改后的信息。
为此, 在核心网的 MSC中也需要配置所述逻辑小区的信息, 以用于处理 Femto 网络的业务。
另外, 在 FGW中还需要记录 MS的登记 FAP, 用于转发 A接口无连接消息, 例如 , 小型蜂窝接入网络网关接收到核心网的移动交换中心发来的信息后, 则可以 根据信息中的目的用户信息确定对应的小型蜂窝接入网络接入点, 所述的用户 信息与小型蜂窝接入网络接入点的对应关系为在位置登记过程或始呼过程或被 呼过程等过程中记录于小型蜂窝接入网络网关中; 之后, 便可以向该对应的小 型蜂窝接入网络接入点发送收到的信息, 或者, 也可以同吋向该对应的小型蜂 窝接入网络接入点及其相邻的小型蜂窝接入网络接入点发送收到的信息, 以实 现无连接消息的传递。
进一步讲, 本发明实施例中, 用于实现 BTS和 BSC功能的 FAP, 其覆盖范围较 小, 而且其支持的用户数量也较少, 故通常一个 FAP仅需要配置一个小区。 考虑 到在核心网络中通常每个 MSC能够支持的小区数量有限, 为此, 可以配置为多 个 FAP釆用相同的小区标识 CELL
ID, 即多个具有相同小区标识的 FAP构成一个逻辑上的小区, 相应的 CELL ID称为逻辑小区标识, 在 FGW上, 需要配置各个 FAP与相应的逻辑小区标识的 对应关系, 假设分配 m个逻辑小区给 Femto网络使用, 则相应的对应关系如表 1所 示:
表 1
Figure imgf000009_0001
[57] 再者, 为了保证 Femto网络业务的正常进行, 相应的在宏网络的 MSC也需要配 置上述逻辑小区标识, 各个逻辑小区属于其所在 FGW对应的 BSC。
[58] 下面将对本发明实施例提供的各业务处理流程进行详细描述。
[59] (一) 位置登记的实现过程
[60] 如图 6所示, 基于表 1记录的信息实现位置登记的过程包括:
[61] 步骤 1-4, FAP接收到 MS的注册消息 Registration Message, 构造 Complete Layer
3 Info: Location Updating Request (位置更亲 if请求) 消息 (该 Complete Layer 3
Info消息中的层 3信息单元为 Location Updating
Request) , 发送给 FGW, FGW接收到 Complete Layer 3 Info: Location Updating Request消息后, 将 Complete Layer 3 Info中的 CELL
ID修改为 FAP对应的逻辑小区的 CELL
ID, 即修改为 FGW上记录的 FAP对应的逻辑小区标识, 发送给 MSC, MSC更新 MS的位置信息, 返回 Location Updating Accept消息。
[62] 其中, Location Updating Request消息作为 Complete Layer 3
Info消息中的层 3信息单元;
[63] 步骤 5-7, FGW接收到位置登记接受 Location Updating
Accept消息, 记录 MS的登记 FAP作为 MS的位置信息, 并将 Location Updating Accept消息转发给相应的 FAP, 相应的 FAP收到该 Location Updating
Accept消息后向 MS发送注册接受命令 Registration Accept Order消息; [64] 其中, 在 FGW上记录 MS标识与登记 FAP的对应关系供转发无连接消息使用, 该对应关系具体可以如表 2所示:
[65] 表 2
[66]
Figure imgf000010_0001
[67] (二) 始呼的实现过程
[68] 如图 7所示, 基于表 1记录的信息实现始呼的过程包括:
[69] 步骤 1-3, FAP接收到 MS的始呼消息 Origination Message, 构造 Complete L3
Info: CM Service Request消息 (该 Complete Layer 3
Info消息中的层 3信息单元为 CM Service
Request (连接管理业务请求) ) , 发送给 FGW; FGW接收到 Complete L3 Info: CM Service Request消息, 将 Complete Layer 3 Info中的 CELL
ID修改为 FAP对应的逻辑小区的 CELL
ID, 并更新 MS的登记 FAP信息, 向 MSC发送 Complete L3 Info: CM Service Request消息;
[70] 步骤 4-8, 在 FGW与 FAP、 FGW与 MSC之间分别建立相应的 SUA连接, 后续的 指酉己请求 Assignment Request消息、 指酉己完成 Assignment
Complete消息和释放消息通过建立的 SUA连接进行转发。
[71] 通过上述处理过程可以看出, 在图 7所示的始呼过程中, 相应的 A2p承载参数 即 FAP业务面的 IP地址和端口号) 无需修改, 业务面 IP包的源和目的地址分别为
FAP和 FGW的 IP地址, 相应的 FGW仅负责进行路由的转发。
[72] (三) 被呼的实现过程
[73] 如图 8所示, 基于表 1记录的信息实现被呼业务的过程包括:
[74] 步骤 1-3, FGW接收到 MSC发来的寻呼请求 Paging Request消息后, 则根据记录的 MS的登记 FAP (参照表 2中的信息) , 向相应的 F AP发送 Paging Request消息, 并由 FAP向本区域内的各 MS发送寻呼消息 Page Message;
[75] 为了保证寻呼成功率, 也可以根据登记 FAP的位置信息扩大相应的寻呼范围, 即寻呼范围包含一个或多个相邻的 FAP;
[76] 对于其它无连接消息, 如短消息等, 相应的转发处理方式与针对 Paging
Request消息的转发处理方式类似;
[77] 步骤 4, 被寻呼的 MS收到相应的 Page Message后, 则向 FAP返回寻呼响应 Page
Response消息;
[78] 步骤 5-11, FAP收到 Page
Response消息后, 则执行与图 7所示的始呼处理相似的处理, 从而实现相应的被 呼业务。
[79] (四) 从小型蜂窝接入网络到核心网络的切换处理过程
[80] 如图 9所示, 从小型蜂窝接入网络切换到核心网络的处理过程包括:
[81] 步骤 1-4, FAP向 FGW发送切换要求 Handoff
Required消息, 在相应的消息中包含核心网络 (如 CDMA网络等, 也可以称为宏 网络) 小区列表 (即目标小区列表) , 其中, FAP对应某一确定的核心网络小区 , FGW收到相应的 Handoff
Required消息后继续向 MSC转发该消息, 并由 MSC与切换后的核心网络中的 BSC 进行交换实现相应的切换处理;
[82] 其中, FGW具体可以将 Handoff
Required消息通过建立的 SUA连接转发给相应的 MSC。
[83] 步骤 5、 6, MSC收到相应的切换请求确认 Handoff Request
Ack消息后, 向 FGW发送切换命令 Handoff
Command消息, 并由 FGW在 SUA连接上转发相应的 Handoff Command消息; [84] 步骤 7-11, 在 MSC收到核心网络中的 BSC发来的切换完成 Handoff
Complete消息后, 则通过相应的 SUA连接向 FGW发送清除命令 Clear
Command消息 (即释放消息) , 以及由 FGW向 FAP发送 Clear Command消息, 以释放 FGW及 FAP上的相应资源; 在完成相应的资源释放过程 后, 则由 FAP向 FGW发送清除完成 Clear
Complete消息, 并由 FGW向 MSC发送 Clear
Complete消息, 以表明相应的资源释放过程完成。
[85] (五) 位置业务的实现过程
[86] 针对 BSC提供信息进行计算的位置业务的实现过程如图 10所示, 即在建立相应 的 SUA连接后相应的位置业务处理流程包括:
[87] 步骤 1、 2, MSC向 FGW发送位置测量请求 Radio Measurements for Position
Request消息, 并由 FGW将该消息转发给相应的 SUA连接对应的 FAP;
[88] 步骤 3、 4, FAP向 FGW返回位置测量响应 Radio Measurements for Position
Response消息, 消息中携带着 FAP的 GPS位置信息, 并由 FGW再将相应的 Radio
Measurements for Position Response、消肩、转发给 MSC;
[89] 其中, 若 FGW已经获知 FAP的 GPS位置信息, 贝 IjFGW也可以直接向 MSC返回 R adio Measurements for Position
Response消息, 此吋, 则可以省略相应的步骤 2和步骤 3; 而且, 若 FGW可以预 先获知相应的 FAP的 GPS位置信息 (如 FAP的 GPS位置信息可以在 FAP上电工作 后上报给 FGW) , 此吋, 由于需要直接响应位置测量请求消息, 要求 FGW对接 收到的 A接口消息类型进行判断。
[90] (六) 计费的实现
[91] 在本发明实施例中, 若运营商希望对小型蜂窝接入网络实施相应的计费策略, 则仅需修改计费后处理软件, 以便于能够根据计费记录中的 CELL
ID进行区分计费处理, 这样, 便可以实现针对小型蜂窝接入网络的计费操作。
[92] 本发明实施例还提供了一种小型蜂窝接入网络网关, 其具体实现结构如图 11所 示, 主要包括以下单元:
[93] 连接建立单元 11, 用于在小型蜂窝接入网络网关与核心网的移动交换中心之间 , 以及与小型蜂窝接入网络接入点之间分别建立信令连接控制部分用户适配层 S UA连接;
[94] 第一信息传递单元 12, 用于通过所述连接建立单元 11建立的两段 SUA连接在小 型蜂窝接入网络网关与核心网的移动交换中心之间, 以及与小型蜂窝接入网络 接入点之间进行信息的传递。
[95] 可选地, 在该设备中还可以包括:
[96] 小区标识修改单元 13, 用于在小型蜂窝接入网络网关接收到小型蜂窝接入网络 接入点发来的信息 (如 A接口消息等) 后, 将信息中的小区标识修改为小型蜂窝 接入网络接入点对应的逻辑小区标识, 并将修改后的信息传递给所述第一信息 传递单元 12进行发送。
[97] 本发明实施例还提供了另一种基于小型蜂窝接入网络的通信设备, 其具体实现 结构如图 12所示, 主要可以包括以下单元:
[98] 配置信息保存单元 21, 用于保存预先配置的逻辑小区的信息, 且在配置的逻辑 小区的信息中, 一个逻辑小区包含一个或多个小型蜂窝接入网络接入点, 即一 个逻辑小区可以仅包含一个小型蜂窝接入网络接入点, 或者, 也可以包含多个 小型蜂窝接入网络接入点; 例如, 在 FGW上, 可以设置各个逻辑小区均包含有 多个小型蜂窝接入网络接入点, 或者, 也可以设置为部分逻辑小区中的各个逻 辑小区包含有多个小型蜂窝接入网络接入点, 其余逻辑小区则仅包含一个小型 蜂窝接入网络接入点;
[99] 第二信息传递单元 22, 用于根据所述配置信息保存单元 21保存的逻辑小区的信 息在核心网的移动交换中心与小型蜂窝接入网络接入点之间进行信息的传递。
[100] 可选地, 相应的第二信息传递单元 22具体可以包括:
[101] 小区标识修改单元 221, 用于在接收到小型蜂窝接入网络接入点发来的信息后 , 根据配置信息保存单元保存的逻辑小区的信息将信息中的小区标识修改为小 型蜂窝接入网络接入点对应的逻辑小区标识;
[102] 信息发送单元 222, 用于向核心网的移动交换中心发送所述小区标识修改单元 修改后的信息。
[103] 可选地, 相应的第二信息传递单元具体可以包括:
[104] 接入点确定单元 223, 用于在接收到核心网的移动交换中心发来的信息后, 根 据信息中的目的用户信息确定对应的小型蜂窝接入网络接入点, 所述的用户信 息与小型蜂窝接入网络接入点的对应关系具体可以为在位置登记过程或始呼过 程或被呼过程等过程中记录于所述配置信息保存单元中;
[105] 信息发送单元 222, 用于向所述接入点确定单元 223确定的该对应的小型蜂窝接 入网络接入点发送收到的信息, 或者, 也可以同吋向该对应的小型蜂窝接入网 络接入点及其相邻的小型蜂窝接入网络接入点发送收到的信息。
[106] 需要说明的是, 上述基于小型蜂窝接入网络的通信设备可以为小型蜂窝接入网 络网关, 即 FGW, 其中, 相应的小区标识修改单元和接入点确定单元也可以同 吋设置于 FGW中以实现相应的处理功能。
[107] 综上所述, 本发明实施例中通过建立的两段 SUA连接, 以及 FGW提供的逻辑小 区标识, 使得在部署小型蜂窝接入网络 (即 Femto网络) 过程中, 仅需要对相应 的宏网络网元进行简单的配置即可支持核心网络所支持的各种业务, 从而便于 用户通过 Femto网络接入网络开展各种业务, 改善用户体验。 而且, 本发明实施 例中, Femto网络具体可以釆用标准的 Alp/A2p接口接入相应的核心网络 (即宏 网络核心网, 如 CDMA网络等) , 而无需修改标准 Alp/A2p接口, 从而进一步提 高 Femto网络的可扩展性能, 即令 Femto网络具有良好的可扩展性能。
[108] 当然, 本发明实施例具体可以在 FGW中实现, 也可以在除 FGW之外的其他 Fem to网络设备中实现, 或者, 也可以在连接于 Femto网络与核心网络之间的网络设 备中实现, 如其他处于 FAP与 MSC之间的网络设备等。
[109] 以上所述, 仅为本发明较佳的具体实施方式, 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 的变化或替换, 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 应该以权利要求的保护范围为准。

Claims

权利要求书
[1] 一种基于小型蜂窝接入网络的通信方法, 其特征在于, 包括:
在小型蜂窝接入网络网关与核心网的移动交换中心之间, 以及小型蜂窝接 入网络网关与小型蜂窝接入网络接入点之间分别建立信令连接控制部分用 户适配层 SUA连接, 通过所述建立的两段 SUA连接在小型蜂窝接入网络网 关与核心网的移动交换中心之间, 以及小型蜂窝接入网络网关与小型蜂窝 接入网络接入点之间进行信息传递。
[2] 根据权利要求 1所述的方法, 其特征在于, 若所述小型蜂窝接入网络接入点 分别对应一个实际的小区标识和一个逻辑小区标识, 则该方法还包括: 小型蜂窝接入网络网关在接收到小型蜂窝接入网络接入点发来的信息后, 将信息中的小区标识修改为小型蜂窝接入网络接入点对应的逻辑小区标识 , 并向核心网的移动交换中心发送修改后的信息。
[3] 一种小型蜂窝接入网络网关, 其特征在于, 包括:
连接建立单元, 用于在小型蜂窝接入网络网关与核心网的移动交换中心之 间, 以及小型蜂窝接入网络网关与小型蜂窝接入网络接入点之间分别建立 信令连接控制部分用户适配层 SUA连接;
第一信息传递单元, 用于通过所述连接建立单元建立的两段 SUA连接在小 型蜂窝接入网络网关与核心网的移动交换中心之间, 以及小型蜂窝接入网 络网关与小型蜂窝接入网络接入点之间进行信息传递。
[4] 根据权利要求 3所述的网关, 其特征在于, 该设备还包括:
小区标识修改单元, 用于在小型蜂窝接入网络网关接收到小型蜂窝接入网 络接入点发来的信息后, 将信息中的小区标识修改为小型蜂窝接入网络接 入点对应的逻辑小区标识, 并将修改后的信息传递给所述第一信息传递单 元进行发送。
[5] 一种基于小型蜂窝接入网络的通信方法, 其特征在于, 包括:
小型蜂窝接入网络网关根据配置的逻辑小区的信息在核心网的移动交换中 心与小型蜂窝接入网络接入点之间进行信息传递, 其中, 在所述配置的逻 辑小区的信息中, 一个逻辑小区包含至少一个小型蜂窝接入网络接入点。
[6] 根据权利要求 5所述的方法, 其特征在于, 所述进行信息的传递的过程具体 包括:
小型蜂窝接入网络网关接收到小型蜂窝接入网络接入点发来的信息后, 将 信息中的小区标识修改为小型蜂窝接入网络接入点对应的逻辑小区标识, 并向核心网的移动交换中心发送修改后的信息。
[7] 根据权利要求 5所述的方法, 其特征在于, 所述进行信息的传递的过程具体 包括:
小型蜂窝接入网络网关接收到核心网的移动交换中心发来的信息后, 根据 信息中的目的用户信息确定对应的小型蜂窝接入网络接入点, 所述的用户 信息与小型蜂窝接入网络接入点的对应关系在位置登记过程或始呼过程或 被呼过程中被记录于小型蜂窝接入网络网关中;
向该对应的小型蜂窝接入网络接入点发送收到的信息, 或者, 向该对应的 小型蜂窝接入网络接入点及其相邻的小型蜂窝接入网络接入点发送收到的
Ι π Λ∑!、。
[8] —种基于小型蜂窝接入网络的通信设备, 其特征在于, 包括:
配置信息保存单元, 用于保存预先配置的逻辑小区的信息, 且在所述配置 的逻辑小区的信息中, 一个逻辑小区包含一个或多个小型蜂窝接入网络接 入点;
第二信息传递单元, 用于根据所述配置信息保存单元保存的逻辑小区的信 息在核心网的移动交换中心与小型蜂窝接入网络接入点之间进行信息传递
[9] 根据权利要求 8所述的设备, 其特征在于, 所述第二信息传递单元具体包括 小区标识修改单元, 用于在接收到小型蜂窝接入网络接入点发来的信息后 , 根据配置信息保存单元保存的逻辑小区的信息将信息中的小区标识修改 为小型蜂窝接入网络接入点对应的逻辑小区标识;
信息发送单元, 用于向核心网的移动交换中心发送所述小区标识修改单元 修改后的信息。 [10] 根据权利要求 8所述的设备, 其特征在于, 所述第二信息传递单元具体包括 接入点确定单元, 用于在接收到核心网的移动交换中心发来的信息后, 根 据信息中的目的用户信息确定对应的小型蜂窝接入网络接入点, 所述的用 户信息与小型蜂窝接入网络接入点的对应关系在位置登记过程或始呼过程 或被呼过程中被记录于所述配置信息保存单元中;
信息发送单元, 用于向所述接入点确定单元确定的该对应的小型蜂窝接入 网络接入点发送收到的信息。
PCT/CN2009/070386 2008-02-15 2009-02-10 基于小型蜂窝接入网络的通信方法及设备 WO2009100677A1 (zh)

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