WO2002098150A1 - Procede pour mettre en oeuvre un echange de voies de conversation lors de l'etablissement d'appels dans un systeme de communication mobile - Google Patents

Procede pour mettre en oeuvre un echange de voies de conversation lors de l'etablissement d'appels dans un systeme de communication mobile Download PDF

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Publication number
WO2002098150A1
WO2002098150A1 PCT/CN2002/000240 CN0200240W WO02098150A1 WO 2002098150 A1 WO2002098150 A1 WO 2002098150A1 CN 0200240 W CN0200240 W CN 0200240W WO 02098150 A1 WO02098150 A1 WO 02098150A1
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Prior art keywords
base station
mobile
calling
communication system
mobile communication
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PCT/CN2002/000240
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English (en)
French (fr)
Inventor
Ganghua Yang
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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 US10/479,317 priority Critical patent/US20040259595A1/en
Priority to EP02708148A priority patent/EP1392066B1/en
Priority to AT02708148T priority patent/ATE549877T1/de
Priority to ES02708148T priority patent/ES2383353T3/es
Publication of WO2002098150A1 publication Critical patent/WO2002098150A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Definitions

  • the present invention relates to a mobile communication system, and more particularly to a method for implementing a base station controller to complete a voice channel exchange in a call connection of a mobile communication system.
  • the voice channel exchange during call connection is performed by mobile Switches, such as the mobile switching center (MSC) in the GSM system, the core network (CN) in the WCDMA system, and the mobile switching center (MSC) in the CDMA2000 system, even if the calling and called mobile stations are located in the same base station controller (such as the GSM system)
  • the base station controller BSC the radio network controller RNC in the WCDMA system, and the base station transceiver station (BTS) coverage area managed by the base station controller BSC in the CDMA2000 system
  • the voice channel exchange still needs to be completed by the mobile switch.
  • the base station transceiver station managed by the Global Digital Mobile Communication System (GSM) under the same base station controller (BSC) includes the following steps for mobile call connection:
  • Mobile station a sends the mobile station international integrated service digital network number (MSISDN) to the mobile switching center (MSC) through the base station transceiver station a (BTSa) and the base station controller (BSC) to complete the channel request and service request , Authentication request, channel assignment, etc .;
  • MSISDN mobile station international integrated service digital network number
  • BTSa base station transceiver station a
  • BSC base station controller
  • the MSC initiates a request to the Home Location Register / Authentication Center (HLR / AUC) for the mobile station roaming number (MSRN);
  • HLR / AUC Home Location Register / Authentication Center
  • MSRN mobile station roaming number
  • VLR Visit Location Register
  • the MSC analyzes that the MSRN learns that the called party is a user of the local office, and sends the message to the VLR as an incoming message (S. F. I. C);
  • the VLR sends a paging request to the MSC
  • the MSC sends a paging request to the BSC and the base transceiver station b (BTSb) and finds the mobile station b (Msb);
  • the exchange of voice channels in the above call connection is completed at the MSC. This will cause a roundabout speech path between BTS to BSC and BSC to SC, and then increase unnecessary data transmission traffic and transmission delay between subsystems, especially Some transmission systems, such as satellite transmission systems, introduce more delays and bit errors, and the delay of the double hop is about 540 milliseconds, which increases the lease cost of the transmission link.
  • the purpose of the present invention is to provide a method for implementing voice channel exchange in call connection of a mobile communication system. By using this method, it is possible to reduce circuitous circuit paths, reduce data flow and transmission delay between mobile system subsystems, and save transmission link lease cost.
  • the present invention provides a method for implementing voice channel exchange in a call connection of a mobile communication system, including the following steps: a. Adding a switching network to a base station transceiver station; b. The mobile communication system completes the movement of the calling party Authentication of the mobile station, determining the location area of the called mobile station, and initiating paging of the called mobile station; c, obtaining information of the coverage area of the base station where the calling and called parties of the mobile station are located, and determining the calling Whether the calling and receiving parties are located at the base transceiver station under the management of the same base station controller; d, when judging that the calling and called parties are located at the receiving and receiving station at the base station controller managed by the same base station controller, the switching network added to the base station controller is completed Connection of voice channel; e. When it is judged that the calling and called parties are located in different base station controllers, the mobile switch completes the connection of the voice channel.
  • step c obtaining the coverage of the transceiver station of the base station where the calling party of the mobile station is located
  • the area information is achieved by the mobile station calling party carrying the cell identification number, and the mobile switching center or the base station controller determines whether the calling and called mobile stations are located in the base station transceiver station service area managed by the same base station controller.
  • the interface between the base station transceiver station and the base station controller in the global digital mobile communication system may use a transmission system supporting a mesh structure, And the base station controller has a structure supporting the full mesh transmission of the interface.
  • step c obtaining the coverage area of the base station transceiver station where the mobile station caller is located.
  • the information is achieved by the mobile station calling party carrying the cell identification information, and the core switching network or the radio network controller determines whether the calling and called mobile stations are located in the base station transceiver station service area managed by the same base station controller.
  • the present invention determines whether the calling and called mobile users are located in the same base station after completing the existing general call flow
  • the switching of the voice channel is completed by the switching network added in the base station controller.
  • the data traffic between the circuitous circuit and the mobile communication system subsystem is reduced, thereby reducing the lease cost of transmission, especially for systems with large data traffic such as WCDMA and CDMA2000, which has greater significance; on the other hand, it reduces The delay caused by unnecessary transmission and the impact on the voice quality, the voice exchange between the calling and called users in the same BSC is completed in the BSC, and through a transmission system supporting a mesh structure (such as a full mesh network for satellite transmission) To avoid unnecessary double-hop delay and save the transmission link.
  • a mesh structure such as a full mesh network for satellite transmission
  • FIG. 1 is a schematic flowchart of a mobile call to move under the same BSC in an existing GSM system
  • FIG. 2 is a schematic flowchart of the present invention
  • FIG. 3 is a schematic flowchart of an application of the present invention in a GSM system
  • FIG. 4 is a schematic diagram of a system in which a double hop is converted to a single hop by satellite transmission between BTS and BSC in a GSM system according to the present invention
  • FIG. 5 is a schematic flowchart of an application of the present invention in a WCDMA system. The best embodiment of the present invention
  • a method for implementing voice channel exchange in a call connection of a mobile communication system includes the following steps-a, adding a switching network to a base station controller;
  • the mobile communication system completes the authentication of the calling mobile station, determines the location area to which the called mobile station belongs, and initiates a page for the called mobile station;
  • c Obtain the information of the coverage area of the base station transceiver station where the calling and called parties of the mobile station are located, and determine whether the calling and called parties are located at the base station transceiver station managed by the same base station controller;
  • the mobile switch completes the voice channel connection.
  • the mobile station caller carries the calling cell identification number, and the mobile switching center (MSC) or base station controller (BSC) determines whether the calling and called mobile stations are located in the base station transceiver station service area managed by the same base station controller.
  • the base station controller has a switching network supporting a voice switching function.
  • the method includes the following steps:
  • the service area of the BTS is determined by the cell identification number CGI.
  • CGI cell identification number
  • the BSC supports control of multiple BTSs.
  • the BSC management station has a list of cell identification numbers of all BTSs under its jurisdiction.
  • the cell identification number of the BTS service area where the called mobile station is located obtained from the VLR needs to be determined to determine the cell where the mobile station is currently located.
  • the called mobile station cell identification number can be obtained in the existing call flow.
  • the calling mobile station cell identification number can be obtained by carrying the cell identification number information when the mobile station sends a message to the base station system.
  • the MSC or BSC determines whether the calling and called mobile users are located in the same BSC service area.
  • the MSC After completing the calling mobile station authentication, determining the location area of the called mobile station, and initiating paging of the called mobile station, the MSC checks the list of cell identification numbers in the corresponding BSC in the BSC number management station to determine the calling and called parties. Whether the current cell identification number of the mobile user belongs to the same BSC, thereby determining whether the BTS service area where the calling and called mobile users are located belongs to the same BSC, that is, whether it belongs to the service area of the same BSC.
  • the above functions can also be implemented in the BSC.
  • the BSC has a switching network that supports voice channel switching.
  • the structure of the switching network (which can be a time switch or a space switch) and capacity are determined based on the statistical results of the probability that the calling and called mobile stations are located in the same BTS service area.
  • the implementation method of the switching network is relatively mature. You can use switching network boards, switching meshes, etc., or you can learn from the existing switching network in MSC.
  • the BSC that supports the internal switching function is notified, and the switching function of the voice channel is completed by it.
  • the voice link from MSa to MSb needs to be switched from MSa to BSC, and then from BSC to MSb, and it needs to go up and down twice (double-hop); after the transition, it only needs to go from MSa to MSb, and up and down once (single-hop). Saves half the transmission bandwidth. After becoming a single hop, it not only saves the transmission link, but also reduces the transmission delay.
  • the double-hop delay of satellite transmission is about 540 milliseconds, and the single-hop delay is halved.
  • BSC supports the mesh transmission structure of Abi s port. That is, during the call flow, when the BSC knows that the calling and called mobile stations are located in the BSC, it notifies the satellite transmission equipment of the BTSs in which the calling and called mobile stations are located, respectively, and completes the conversion from the star connection to the mesh connection to realize the voice channel. direct connection.
  • the functions of the voice channel exchange in the Global Digital Mobile Communication System (GSM) call connection are as follows: the information of the mobile station carrying the calling cell identification number when the calling party of the mobile station; the MSC determines the current cell identification of the calling and called mobile user Whether the number belongs to the same BSC, or whether the task is completed by the BSC; the BSC has a switching network and can complete the voice channel switching function; the BSC supports the full-mesh transmission structure of the Abis s port, and changes the double hop to a single hop.
  • GSM Global Digital Mobile Communication System
  • the mobile station calling party carries the calling cell identification information, which is determined by the core switching network (CN) or the radio network controller (RNC). Whether the calling and called mobile stations are located in the base transceiver station service area managed by the same base station controller.
  • CN core switching network
  • RNC radio network controller

Description

一种实现移动通讯系统呼叫接续中语音信道交换的方法 技术领域
本发明涉及一种移动通讯系统， 更具体地指一种实现移动通讯系统呼叫接续 中支持基站控制器完成语音信道交换的方法。 背景技术
在目前移动通讯系统（如： 全球数字移动通讯系统 GSM、 码分多址系统 CDMA、 宽带码分多址系统 WCDMA、 码分多址系统 CDMA2000等） 中， 呼叫接续中语音信道 的交换是由移动交换机， 如 GSM系统中移动交换中心 （MSC) 、 WCDMA系统中的核 心网 （CN) 、 CDMA2000系统中的移动交换中心 （MSC)完成的， 即使主被叫移动台 位于同一基站控制器 （如 GSM系统中基站控制器 BSC、 WCDMA系统中的无线网络控 制器 RNC、 CDMA2000系统中的基站控制器 BSC) 管理下的基站收发信台 (BTS)覆盖 区， 语音信道交换仍需要由移动交换机完成。
如图 1 所示， 全球数字移动通讯系统 （GSM) 同一基站控制器 （BSC ) 管理 下的基站收发信台 BTS覆盖区下移动呼叫接续过程包括以下步骤：
1 ) 移动台 a (Msa)通过基站收发信台 a (BTSa) 和基站控制器（BSC) 向移动交 换中心 （MSC)发送移动台国际综合服务数字网络号码 （MSISDN) ， 完成信道 请求、 业务请求、 鉴权请求、 信道指配等过程；
2) MSC 向归属位置寄存器 /鉴权中心 （HLR/AUC) 发起请求， 索取移动台漫游号 码 (MSRN) ；
3) 拜访位置寄存器 （VLR) 提供移动台漫游号码 （MSRN) 并回送至 MSC;
4) MSC分析 MSRN得知被叫是本局用户，向 VLR发送为来话发送信息（S. F. I. C)；
5) VLR向 MSC发寻呼请求；
6) MSC向 BSC和基站收发信台 b (BTSb) 发出寻呼请求并找到移动台 b (Msb) ；
7) 在 MSC中完成语音信道的交换。
上述呼叫接续中语音信道的交换在 MSC完成。这样会造成了 BTS至 BSC、BSC至 SC间的话路迂回， 进而增加不必要的子系统间数据传输流量及传输时延， 特别是 某些传输系统，如卫星传输系统，时延和误码的引入较多，双跳的时延约 540毫秒， 从而增加传输链路租赁费用。
本发明的目的在于提供一种实现移动通讯系统呼叫接续中语音信道交换的方 法，利用该方法可以减少话路迂回、减少移动系统子系统间的数据流量及传输时延， 并节省传输链路租赁费用。 发明内容
为了实现上述目的， 本发明所提供的一种实现移动通讯系统呼叫接续中语音 信道交换的方法， 包括下列步骤： a，在基站收发信台中增加交换网络； b，移动通 讯系统完成对主叫移动台的鉴权、 对被叫移动台所属位置区进行确定、 并对被 叫移动台发起寻呼； c，获取移动台主被叫双方所处基站收发信台覆盖区的信息， 并判断主被叫双方是否位于同一基站控制器管理下的基站收发信台； d,当判断主被 叫双方位于同一基站控制器管理下的基站收发信台时，则由在基站控制器中增加的 交换网络完成语音信道的接续； e,当判断主被叫双方位于不同基站控制器管理时， 则由移动交换机完成语音信道的接续。
在上述的实现移动通讯系统呼叫接续中语音信道交换的方法中， 当上述的移 动通讯系统为全球数字移动通讯系统 （GSM) 时， 步骤 c中， 获取移动台主叫所处 基站收发信台覆盖区的信息是通过移动台主叫携带小区识别号来达到的， 并由移 动交换中心或者基站控制器判断主被叫移动台是否位于同一基站控制器管理下的 基站收发信台服务区。
在上述的实现移动通讯系统呼叫接续中语音信道交换的方法中， 所述的全球 数字移动通讯系统中的基站收发信台和基站控制器之间的接口可以釆用支持网状 结构的传输系统， 且基站控制器具有支持该接口全网状传输的结构。
在上述的实现移动通讯系统呼叫接续中语音信道交换的方法中， 当上述的 移动通讯系统为宽带码分多址系统时， 步骤 c 中， 获取移动台主叫所处基站收发 信台覆盖区的信息是通过移动台主叫携带小区识别信息来达到的， 并由核心交换 网或者无线网络控制器判断主被叫移动台是否位于同一基站控制器管理下的基站 收发信台服务区。
本发明在完成现有一般呼叫流程后， 判断主被叫移动用户是否位于同一基站 控制器管理下的基站收发信台覆盖区，当主被叫双方位于同一基站控制器管理下的 基站收发信台时，则由在基站控制器中增加的交换网络完成语音信道的交换。这样， 一方面减少了话路迂回和移动通讯系统子系统间的数据流量，从而减少传输的租赁 费用， 尤其对于 WCDMA、 CDMA2000等数据流量大的系统， 具有更大的意义； 另一方 面减少了不必要的传输造成的时延和对语音质量的影响，将同一 BSC内的主被叫用 户的语音交换在 BSC内完成，通过支持网状结构的传输系统（如卫星传输的全网状 网） ， 避免了不必要的双跳时延， 节省了传输链路。 附图概述
图 1为现有的 GSM系统在同一 BSC下移动呼叫移动的流程示意图； 图 2为本发明的流程示意图；
图 3为本发明在 GSM系统中应用的流程示意图；
图 4本发明在 GSM系统中 BTS和 BSC之间釆用卫星传输双跳变为单跳的系统 示意图；
图 5为本发明在 WCDMA系统中应用的流程示意图。 本发明的最佳实施方案
请参阅图 2，本发明所提供的一种实现移动通讯系统呼叫接续中语音信道交换 的方法， 包括下列步骤- a， 在基站控制器中增加交换网络；
b,移动通讯系统完成对主叫移动台的鉴权、 对被叫移动台所属位置区进行 确定、 并对被叫移动台发起寻呼；
c，获取移动台主被叫双方所处基站收发信台覆盖区的信息， 并判断主被叫双 方是否位于同一基站控制器管理下的基站收发信台；
d，当判断主被叫双方位于同一基站控制器管理下的基站收发信台时，则由在基 站控制器中增加的交换网络完成语音信道的接续；
e，当判断主被叫双方位于不同基站控制器管理时，则由移动交换机完成语音信 道的接续。
请再结合图 3所示， 当上述的移动通讯系统为全球数字移动通讯系统 （GSM) 时，移动台主叫携带主叫小区识别号，由移动交换中心（MSC)或者基站控制器（BSC) 判断主被叫移动台是否位于同一基站控制器管理下的基站收发信台服务区，同时基 站控制器具有支持语音交换功能的交换网络。
该方法具体包括以下步骤：
1 . 获取移动台主被叫双方小区识别号
BTS的服务区是由小区识别号 CGI确定的。对于全向基站，仅有一个小区， 对应一个小区识别号； 定向基站根据扇区数量不同， 有相应数量的小区， 对应 多个小区识别号。
BSC支持对多个 BTS的控制。 在 BSC的管台中， 具有本 BSC下辖所有 BTS的小区识别号列表。
在呼叫的接续流程中， 需要根据从 VLR中获取的被叫移动台所位于 BTS 服务区的小区识别号， 以确定移动台当前位于的小区。
被叫移动台小区识别号在已有呼叫流程中就能获取的。
主叫移动台小区识别号可以通过移动台向基站系统发送消息时携带小区识 别号信息来获取。
2. 由 MSC或者 BSC判断主被叫移动用户是否位于同一 BSC服务区
在完成主叫移动台鉴权、 对被叫移动台所属位置区进行确定、 并对被叫移 动台发起寻呼后， MSC查 BSC的数管台中相应 BSC 内小区识别号列表， 确 定主被叫移动用户当前的小区识别号是否属于同一 BSC, 从而确定主被叫移动 用户位于的 BTS服务区是否属于同一 BSC, 即是否属于同一 BSC的服务区。
为了减少对现有网络的冲击， 上述功能也可以在 BSC中实现。
3. 支持内部语音信道交换功能的 BSC
BSC具有交换网络， 支持语音信道交换， 交换网络的结构 （可以是时间交 换器或者是空间交换器）和容量， 是根据主被叫移动台位于同一 BTS服务区可 能性的统计结果确定。
交换网络的实现方法比较成熟， 可以釆用交换网板、 交换网片等， 也可以 借鉴 MSC中现有的交换网络。
4. 根据主被叫移动用户是否位于同一 BSC服务区的判断结果， 选择适当的语 音信道交换方式 若主被叫移动用户不位于同一 BSC服务区，按照当前现有的流程完成语音 信道的交换功能， 即由 MSC完成语音信道的交换；
若主被叫移动用户位于同一 BSC服务区， 通知支持内部交换功能的 BSC, 由其完成语音信道的交换功能。
5. 支持 Abis口的全网状网传输结构
请结合图 4，对于 BTS和 BSC间 Abi s口采用的一些支持网状结构的传输系 统 （如卫星传输的全网状网） ， 在完成呼叫接续后， 主被叫位于的两个 BTS可 以跳过 BSC, 直接建立连接， 从而由双跳改变为单跳。
MSa至 MSb的语音链路， 转变前， 需要由 MSa至 BSC、 再由 BSC至 MSb， 需 要上下星两次 （双跳） ； 转变后， 仅需要 MSa至 MSb， 上下星一次 （单跳） 。 节省了一半传输带宽。 变为单跳后， 不仅节省了传输链路， 而且可以降低传输 时延。 卫星传输的双跳时延约 540毫秒， 单跳时减半。
BSC支持 Abi s口的网状传输结构。 即呼叫流程时， BSC确知主被叫移动台 位于本 BSC时， 将主被叫移动台分别位于的 BTS告知卫星传输设备， 由其完成 星状连接到网状连接的转换， 实现语音信道的直接连接。
综上所述， 全球数字移动通讯系统 （GSM) 呼叫接续中语音信道交换所具有的 功能如下： 移动台主叫时携带主叫小区识别号的信息； MSC 判断主被叫移动 用户当前的小区识别号是否属于同一 BSC, 或者此任务由 BSC完成； BSC具 有交换网络， 可以完成语音信道交换功能； BSC支持 Abi s口全网状传输结构， 将 双跳转变为单跳。
请参见图 5, 当上述的移动通讯系统为宽带码分多址系统 （WCDMA ) 时， 移动台主叫携带主叫小区识别信息， 由核心交换网 （CN)或者无线网络控制器 ( RNC ) 判断主被叫移动台是否位于同一基站控制器管理下的基站收发信台服务 区。

Claims

1 . 一种实现移动通讯系统呼叫接续中语音信道交换的方法， 包括下列步骤： a, 在基站控制器中增加交换网络；
b，移动通讯系统完成对主叫移动台的鉴权、 对被叫移动台所属位置区进行 确定、 并对被叫移动台发起寻呼；
c，获取移动台主被叫双方所处基站收发信台覆盖区的信息， 并判断主被叫双 方是否位于同一基站控制器管理下的基站收发信台；
d，当判断主被叫双方位于同一基站控制器管理下的基站收发信台时，则由在基 站控制器中增加的交换网络完成语音信道的接续；
e,当判断主被叫双方位于不同基站控制器管理时，则由移动交换机完成语音信 道的接续。
2.如权利要求 1所述的一种实现移动通讯系统呼叫接续中语音信道交换的方 法， 其特征在于， 当上述的移动通讯系统为全球数字移动通讯系统时， 步骤 c中， 获取移动台主叫所处基站收发信台覆盖区的信息是通过移动台主叫携带小区识别 号来达到的，并由移动交换中心或者基站控制器判断主被叫移动台是否位于同一基 站控制器管理下的基站收发信台服务区。
3.如权利要求 2所述的一种实现移动通讯系统呼叫接续中语音信道交换的方 法，其特征在于，所述的全球数字移动通讯系统中的基站收发信台和基站控制器之 间的接口可以采用支持网状结构的传输系统， 且基站控制器具有支持该接口全网 状传输的结构。
4.如权利要求 1所述的一种实现移动通讯系统呼叫接续中语音信道交换的方 法， 其特征在于， 当上述的移动通讯系统为宽带码分多址系统时， 步骧 c中， 获取 移动台主叫所处基站收发信台覆盖区的信息是通过移动台主叫携带小区识别信息 来达到的，并由核心交换网或者无线网络控制器判断主被叫移动台是否位于同一基 站控制器管理下的基站收发信台服务区。
PCT/CN2002/000240 2001-05-30 2002-04-08 Procede pour mettre en oeuvre un echange de voies de conversation lors de l'etablissement d'appels dans un systeme de communication mobile WO2002098150A1 (fr)

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EP02708148A EP1392066B1 (en) 2001-05-30 2002-04-08 A method for implementing speech channel exchange in the call succession of the mobile communication system
AT02708148T ATE549877T1 (de) 2001-05-30 2002-04-08 Verfahren zur implementierung des sprachkanalaustauschs bei der verbindungssukzession des mobilkommunikationssystems
ES02708148T ES2383353T3 (es) 2001-05-30 2002-04-08 Un método para la implementación de una conmutación de canal de voz en una sucesión de llamadas del sistema de comunicaciones móviles

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ES2383353T3 (es) 2012-06-20
US20040259595A1 (en) 2004-12-23

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