WO2007062560A1 - Centre de communication mobile et procede de traitement d'appels - Google Patents

Centre de communication mobile et procede de traitement d'appels Download PDF

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Publication number
WO2007062560A1
WO2007062560A1 PCT/CN2006/002137 CN2006002137W WO2007062560A1 WO 2007062560 A1 WO2007062560 A1 WO 2007062560A1 CN 2006002137 W CN2006002137 W CN 2006002137W WO 2007062560 A1 WO2007062560 A1 WO 2007062560A1
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WO
WIPO (PCT)
Prior art keywords
call
connection
called
type
user
Prior art date
Application number
PCT/CN2006/002137
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English (en)
French (fr)
Inventor
Hao Wang
Yongli Jia
Original Assignee
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.
Priority to DE602006010867T priority Critical patent/DE602006010867D1/de
Priority to CNA2006800123310A priority patent/CN101161019A/zh
Priority to AT06775455T priority patent/ATE450993T1/de
Priority to EP06775455A priority patent/EP1898658B1/en
Publication of WO2007062560A1 publication Critical patent/WO2007062560A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/25Maintenance of established connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16Communication-related supplementary services, e.g. call-transfer or call-hold
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • H04W76/38Connection release triggered by timers

Definitions

  • the present invention relates to mobile communication technologies, and more particularly to a called processing technology of a mobile switching center in a mobile communication system.
  • the second generation digital system mainly includes Global System for Mobile Communication (“GSM”) and Code Division Multiple Access (“CDMA”), among which GSM is in the world.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • the application is the most widely used, and the number of users has reached more than 100 million.
  • communication technology has developed rapidly. More prominent is the Wideband Code Division Multiple Access (WCDMA) communication system, which has the characteristics of high frequency utilization and strong anti-interference ability. Therefore, it has gradually become a kind of analog system and GSM system. Mobile mobile system with stronger vitality and application prospects.
  • WCDMA technology also plays an important role.
  • GSM Global System for Mobile communications
  • WCDMA Wideband Code Division Multiple Access
  • intelligence refers to the ability to access stored data, process the data, and make decisions based on the data. It enables the entire communication system to implement and control services faster, easier, and more flexibly, and can provide intelligent prepaid Special services such as fees, universal numbers, networked emergency calls, and virtual private networks.
  • the smart prepaid service as an example, the user can use any telephone to make a call, and the call charge will be deducted from his account instead of being recorded on the phone bill it uses; each time the call is made, the network first queries the user for dialing in. Whether the account number and password are valid, whether the account balance can pay for the call; When the call ends or the balance is exhausted, the call information/billing information is saved for later use.
  • the familiar 200, 300 and IP card phones are typical smart prepaid services.
  • the intelligence of the network has the following characteristics: Effective use of information network resources; Effective use of the network Network resources; modularization of network functions; reuse of standard network functions to generate and implement new services; network functions can be flexibly allocated in physical entities; standard communication between network functions through business-independent interfaces; The user can control the business attributes specified by the user; the business user can control the business attributes specified by the user; the standardized business plan.
  • FIG. 1 Currently, in a mobile communication network, when an intelligent user is a called user, the paging process of the network is as shown in FIG. 1 or FIG. 2.
  • the GMSC is the Gateway Mobile Switching Centre (GMSC) s SCP is the service control point (Service Control Point). , referred to as "SCP” for short, HLR is the Home Location Register ("HLR”;), and the MSC is the Mobile Switching Center (MSC).
  • the BSC is the base station controller (Base Station). Controller, referred to as "BSC").
  • the SCP is used to store user data and business logic.
  • the main function of the SCP is to receive query information sent by the Service Switch Point (SSP) and query the database for various decoding.
  • SSP Service Switch Point
  • the SCP initiates different service logics according to the call events reported by the SSP, and issues call control commands to the corresponding SSP according to the service logic, thereby implementing various intelligent calls;
  • the HLR is a location register of the user's location, and is used to record the latest location of the user;
  • the MSC is used for communication control and management of mobile users located in its control area, providing interfaces for connecting MSCs and numerous base stations in other areas, as well as connection and information exchange for mobile subscriber calls; BSC is responsible for network resource management, channel conversion, etc. A variety of control functions.
  • the Subscriber Information referred to as the "PSI" process, that is, the MSC will first deliver the PSI page. After the PSI page responds, the MSC removes the connection with the mobile terminal side.
  • the PSI call is mainly used to find the current location of the user equipment, and the call rate can be determined according to the current location of the user equipment. If the prepaid of the user allows the establishment of the call, the ordinary call can be initiated. Therefore, this is commonly used. Processing of prepaid users. However, since the second ordinary call does not necessarily occur, the PSI call acts as a call in the sense of a call, and the connection is immediately released after the call is completed.
  • the paging message of the normal call is sent again when the connection is normal, and the call is turned on after the mobile terminal returns the paging response. Therefore, under normal circumstances, each time a smart user acts as a called user, Make two pages.
  • the GMSC, the SCP, the HLR, and the MSC are the same as those in FIG. 1, and the RNC is the radio network controller (Radio Network Controller). Called "RNC").
  • RNC Radio Network Controller
  • the process is also basically the same as the process shown in Figure 1.
  • the PSI process is triggered first, that is, the MSC sends the PSI page to the RC first. After the PSI page response, the MSC sends the PSI to the MSC.
  • the RNC sends a command in the security mode.
  • the MSC After the RC responds to the security mode, the MSC removes the connection with the mobile terminal by using the command and response released by the Iu interface. Then, the paging message of the normal call is sent again during the normal connection, and the call is turned on after the mobile terminal returns the paging response. Therefore, normally every time the smart user acts as the called user, the page will be paged twice.
  • the mobile terminal In each paging process, the mobile terminal needs to establish a wireless channel connection with the base station on the network side. After responding to the paging, the mobile terminal needs to respond to the next paging message. The current terminal is switched to the paging channel, so the mobile terminal needs to release the wireless channel connection established by the base station on the network side, and each paging processing flow on the mobile terminal side is as shown in FIG. 3. Therefore, when the smart user acts as the called user, the mobile terminal needs to establish a wireless channel connection with the base station on the network side in response to the first PSI paging, and release the wireless channel connection after the PSI paging response. Then, at the normal connection, the mobile terminal responds to the paging message of the second normal call, and after the paging response, the call is turned on.
  • MAP Mobile Application Part
  • 3GPP TS 29.002 Mobile radio interface Layer 3 specification
  • 3GPP TS 24.008. Core network protocols; Stage (phase) and “UTRAN Iu interface RANAP signalling” in 3GPP TS 25.413.
  • the network side initiates two pages.
  • the time interval of the process is very short, and in many cases is about 1 second. Therefore, for some mobile terminals, it is very likely that the release of the wireless connection established in the first PSI paging response cannot be completed in this short time.
  • Process on the wireless channel established from the first page response When the switch is switched to the paging channel, the second ordinary call page cannot be responded immediately, and the network side needs to resend one or more pages before responding, thereby affecting the timely connection of subsequent ordinary calls.
  • the mobile terminal cannot respond to the second paging process immediately, and the network side needs to send the paging multiple times to respond, it not only increases the load on the access side, but also needs to be on the network side during each paging process.
  • the processing of paging, access, authentication, etc., also wastes resources on the network side.
  • the main object of the present invention is to provide a mobile switching center and a method for calling the same, so that the paging success rate of the subsequent call of the intelligent user is improved, and the call flow is simplified.
  • the present invention provides a method for processing a called party in a mobile communication system, comprising the following steps:
  • the mobile switching center reserves the connection with the called user used by the call, otherwise the connection is released; when the mobile switching center receives the call.
  • the call process is directly used to continue the call process, otherwise the connection is established with the called user terminal by paging.
  • the preset call type is to provide a user information call.
  • the type of the call includes:
  • Voice service paging short message service paging, supplementary service paging, video service paging, location service paging, and provision of user information paging.
  • the mobile communication system comprises a global mobile communication system and a wideband code division multiple access system.
  • the present invention also provides a mobile switching center for performing communication control and management, and connecting calls to mobile users located in its control area, including a connection release module for releasing a connection, the mobile switching center further comprising:
  • a call type identification module configured to determine whether the type of the call is consistent with the preset call type
  • a connection reservation module configured to retain a connection with the called user used by the call at the end of the call
  • the call type identification module determines whether the type of the call is consistent with the preset call type, and if so, invokes the connection reservation module to reserve the connection of the call, for Calls to the same called user are used directly, otherwise the connection release module is called to release the connection of the call.
  • a timer configured to start when the connection retention module retains the connection, and invoke the connection release module to release the connection when a preset duration is exceeded.
  • the preset call type is to provide a user information call.
  • the mobile switching center belongs to a global mobile communication system or a wideband code division multiple access system.
  • the MSC does not simply release the connection, but increases the judgment of the call type, if it is the specified type.
  • a call such as a PSI call, retains the connection for the next call to the same called user.
  • the connection is reserved for a certain period of time, and if there is no next call to the called user beyond the time limit, the connection is released.
  • the two paging processes are combined once, which simplifies the call flow, shortens the connection time of the call, saves the resources on the network side and the access side, and reduces the paging message sent by the network side to the access side, which reduces the connection. Load on the side.
  • FIG. 1 is a schematic diagram of a paging process of a network when a smart user is a called user in a GSM system of the prior art
  • FIG. 2 is a schematic diagram of a paging process of a network when a smart user is a called user in a WCDMA system of the prior art
  • 3 is a schematic diagram of a process of processing each paging on the mobile terminal side in the prior art
  • FIG. 4 is a schematic flowchart of a system at the end of a call in a called process flow of the mobile communication system according to the present invention
  • Figure 5 is a flow chart showing the flow of a system when a call is received in a called process flow of a mobile communication system according to the present invention
  • FIG. 6 is a schematic structural diagram of an MSC in a system in a called process flow of a mobile communication system according to the present invention
  • FIG. 7 is a schematic diagram showing a flow of processing of a called party in a mobile communication system according to a first embodiment of the present invention
  • Figure 8 is a schematic diagram showing the flow of processing of a called party in a mobile communication system according to a second embodiment of the present invention.
  • the core of the present invention is that the MSC in the network does not immediately release the connection after processing the call to the intelligent user, but first determines the call type of the call, if the call is a designated type of call, such as a PSI call. , leaving the connection and starting the timer for the next call to the same called user. When the connection retention time exceeds the preset threshold, that is, when the timer expires, there is still no next call to the called user. The connection is released; if the call is not a call of the specified type, the connection is released.
  • a designated type of call such as a PSI call.
  • the MSC when the MSC receives the call, it can first check whether the connection with the called user is currently reserved, and if so, directly use the connection to continue the call process, otherwise establish a connection with the called user terminal through paging. . Therefore, the present invention can avoid sending two consecutive pages to the same called user in a short period of time, which improves the paging success rate of the subsequent call of the intelligent user, and simplifies the call flow.
  • FIG. 4 is a schematic diagram of the flow of the system at the end of the call in the called processing flow of the mobile communication system of the present invention
  • FIG. 5 is a schematic diagram of the flow when the system receives the call in the called processing flow of the mobile communication system of the present invention
  • the MSC for performing communication control and management, and connecting calls to mobile users located in its control area includes a call type identification module, in addition to the connection release module, A new module such as a reserved module and a timer is connected. Therefore, the structure of the MSC in the present invention will be described below.
  • the structure of the MSC in the present invention is as shown in Fig. 6.
  • the call type identification module 1, the connection # ⁇ module 2, the connection reservation module 3, and the timer 4 are included in the MSC.
  • the call type identification module 1 is configured to determine whether the type of the call is consistent with the preset call type;
  • the connection reservation module 3 is configured to reserve a connection with the called user when the call ends; 2 is used for dry connection;
  • the timer 4 is used to start when the connection reservation module retains the connection, and the connection release module is called to release the connection when the preset duration is exceeded.
  • the invocation of these modules in the MSC will be explained in the following flows.
  • the MSC in the mobile communication system determines whether the call type is consistent with the preset type. Specifically, when the MSC processes the call to the smart subscriber, it first determines whether the type of the call is consistent with the preset call type. If the type of the call is consistent with the preset call type, proceed to step 420 to reserve the connection and start the timer; if the type of the call does not match the preset call type, proceed directly to step 440 to release the call established. connection.
  • the preset call type may be a PSI call.
  • the MSC reserves the connection and starts the timer. Specifically, when the call type identification module in the MSC determines that the type of the call is consistent with the preset call type, the connection reservation module in the MSC is called to reserve the connection of the call for the next call to the same called party. The user's call is used directly, and at the same time, the timer in the MSC is started.
  • the MSC determines whether the connection retention time exceeds a preset threshold. That is, the MSC controls the retention time of the connection through a timer.
  • the connection retention module retains the connection for more than the preset duration, that is, when the timer expires, the process proceeds to step 440 to release the connection.
  • step 440 the MSC is dry-connected. If, in step 410, the call type identification module determines that the type of the call is inconsistent with the preset call type and proceeds to this step, the MSC directly releases the connection established by the call by calling the connection release module; The type identification module determines that the type of the call is consistent with the preset call type. When the timer expires, the MSC releases the connection established by the call by calling the connection release module.
  • step 510 when receiving the call, the MSC first checks whether there is currently a connection with the called called user, and if so, proceeds to step 520 to directly use the connection to continue the call process. If not, proceed to step 530 to establish a connection with the called user terminal by paging.
  • the types of calls received by the MSC may be voice service paging, short message service paging, supplementary service paging, video service paging, positioning service paging, and PSI paging.
  • the MSC continues the call process using the connection. Since the MSC ends the call of the preset type, the established connection is not directly released. Therefore, after receiving the call type such as voice service paging, short message service paging, supplementary service paging, and PSI paging, the MSC may currently (with the timer not timeout) still retaining The call is connected between the called users. Therefore, the MSC does not need to send a paging message, and the call can be directly used to continue the call process.
  • the call type such as voice service paging, short message service paging, supplementary service paging, and PSI paging
  • step 530 the MSC establishes a connection with the called called user. If the MSC does not currently maintain a connection with the called user, the connection is established with the called user terminal by sending a paging message.
  • the processing flow of the called party in the mobile communication system is as shown in Fig. 7.
  • the mobile communication system is GSM
  • the preset call type is a PSI call.
  • the GMSC receives the start address message.
  • IAM Initial Address Message
  • step 702 the GMSC sends a Routing Information (SRT,) to the HLR.
  • SRT Routing Information
  • step 703 the HLR sends a PSI call to the MSC.
  • step 704 the MSC sends a paging message to the BSC.
  • step 705 the BSC responds to the MSC with a page.
  • Steps 701 to 705 are identical to the prior art.
  • the MSC determines whether the type of the call is consistent with the preset call type by using the call type identification module. Due to the present embodiment
  • the preset call type is a PSI call. Therefore, the call type identification module can know that the type of the call is consistent with the preset call type. Therefore, the MSC does not immediately release the connection, but retains and is called through the connection reservation module.
  • the user's connection starts the timer at the same time, until the reserved connection exceeds the preset duration, that is, when the timer expires, the connection is released by calling the connection release module. For example, if the preset duration is 3 seconds, then the MSC will reserve the connection with the called user for 3 seconds, the timer expires, and the connection translation module is called to release the connection when the timeout expires.
  • step 706 the MSC responds to the HLR with a PSI call.
  • step 707 the HLR responds to the GMSC SRL
  • step 708 the GMSC delivers a starting data packet ("DP") to the SCP.
  • DP starting data packet
  • step 709 the SCP performs a splicing step to the GMSC.
  • step 710 the GSMC sends the SRL to the HLR again.
  • step 711 the HLR provides the MSC with a Provide Roaming Number ("PRN").
  • PRN Provide Roaming Number
  • step 712 the MSC responds to the HLR with a PRN.
  • step 713 the HLR responds to the GMSC SRL
  • step 714 the GMSC sends an IAM to the MSC.
  • Steps 706 to 714 are the same as the prior art.
  • the MSC After receiving the IAM, the MSC does not immediately send a paging message, but first checks whether the connection with the called user is currently reserved. In general, when a smart user is called, in most cases, it can be connected normally. That is to say, in most cases after the PSI call, there are subsequent calls, and the time interval between the two calls is very short, many The time is about 1 second. Therefore, the length of time preset by the timer will not be exceeded. That is to say, at this time, the MSC still has a connection with the called user of the call.
  • the MSC directly utilizes the established wireless channel.
  • step 716 the BSC sends a call confirmation to the MSC.
  • step 717 the BSC signals the MSC.
  • step 718 the MSC sends an Address Complete Message ("ACM") to the GMSC.
  • ACM Address Complete Message
  • step 719 the GMSC sends the received ACM again.
  • the user is called to connect with the called user so that the calling user and the called user can communicate with each other.
  • the MSC uses the connection reserved by the previous call to combine the two paging processes once, which simplifies the call flow, shortens the call connection time, and saves the network side and
  • the resources on the access side reduce the paging message sent by the network side to the access side, reducing the load on the access side.
  • the R/RC connection established by the PSI paging response of some types of mobile phones is not completely released, and subsequent ordinary calls cannot be immediately solved.
  • the problem of paging response is to improve the paging success rate of subsequent ordinary calls.
  • the call processing flow in the mobile communication system according to the second embodiment of the present invention is as shown in FIG. 8.
  • the present embodiment is basically the same as the first embodiment except that the applied mobile communication system is different.
  • the applied mobile communication system is GSM, and in the present embodiment, the applied mobile communication system is WCDMA.
  • the MSC uses the connection reserved by the previous call, and the process of combining the two paging processes into one process is completely the same as that of the first embodiment. Therefore, the present embodiment can fully achieve the functions and effects of the first embodiment.
  • the following is a brief description of the relevant steps:
  • Steps 801 to 805 correspond to steps 701 to 705.
  • the associated interaction of the security mode is increased in WCDMA relative to GSM, steps 806 and 807.
  • Steps 808 through 821 correspond to steps 706 through 719, respectively.

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Description

移动交换中心及其被叫处理方法
技术领域 本发明涉及移动通信技术, 特别涉及移动通信系统中移动交换中心的 被叫处理技术。
背景技术
自从 80年代模拟移动通信系统诞生以来,在短短十几年里移动通信在 全球得到飞速发展, 已经从第一代模拟系统发展到第二代数字系统。 目前, 第二代数字系统主要包括全球移动通信系统 (Global System for mobile Communication, 筒称 "GSM" )和码分多址( Code Division Multiple Access, 简称 "CDMA" )等, 其中 GSM在世界上的应用最为广泛, 用户已经达到 1 亿多。 而近年来, 通信技术更是得到了迅猛发展。 比较突出的是宽带码 分多址 ( Wideband Code Division Multiple Access, 简称 "WCDMA" )通信 系统, 它具有频率利用率高、 抗干扰能力强等特点, 因此逐渐成为在模拟 制式、 GSM制式之后一种具有更强生命力和应用前景的移动通行制式。 在 数字移动通信领域中, WCDMA技术也扮演了重要角色。
由于整个电信网络正逐步向着智能化、 宽带化、 个人化的方向发展。 因此, 无论是作为目前移动通信的核心网络之一的 GSM, 还是具有更强生 命力和应用前景的 WCDMA, 都向着这个方向发展。
在通信网络中, 智能是指访问所存储的数据、 处理该数据和根据该数 据作出判断的能力, 它使整个通信系统可以更快、 更容易和更灵活的实现 和控制业务, 可以提供智能预付费、 通用号码、 联网应急电话、 虛拟专用 网等特色业务。 以智能预付费业务为例, 用户可以使用任何一部话机进行 呼叫, 通话费用将从其帐号上扣除而不是记在其使用的话机帐单上; 每次 呼叫时, 网络首先查询该用户拨入的帐号、 密码是否有效, 其帐号余额是 否可以支付此次呼叫; 当通话结束或余额用尽时, 将呼叫信息 /计费信息保 存起来供以后所用。 在我国, 人们所熟悉的 200、 300和 IP卡电话是典型 的智能预付费业务。
网络的智能化有以下特点: 有效地使用信息网络资源; 有效地使用网 络资源; 网络功能的模块化; 重复使用标准的网络功能来生成和实施新的 业务; 网络功能可在物理实体中灵活地分配; 通过独立于业务的接口, 网 络功能间实现标准的通信; 业务用户可以控制由用户所规定的业务属性; 业务使用者可以控制由使用者所规定的业务属性; 标准化的业务£辑。
目前, 在移动通信网络中, 当智能用户作为被叫用户时, 网络的寻呼 过程如图 1或图 2所示。
在图 1所示的 GSM系统中智能用户作被叫用户时网络的寻呼流程中, GMSC 为网关移动交换中心 (Gateway Mobile Switching Centre , 简称 "GMSC" )s SCP为业务控制点( Service Control Point, 简称 "SCP" )、 HLR 为归属位置寄存器(Home Location Register, 筒称 "HLR";)、 MSC为移动 交换中心(Mobile Switching Center,筒称" MSC" ). BSC为基站控制器(Base Station Controller, 简称 "BSC" )。 其中, SCP用于储用户数据和业务逻辑。 SCP的主要功能是接收业务交换点( Service Switch Point, 简称 "SSP" )送 来的查询信息并查询数据库, 进行各种译码。 同时, SCP根据 SSP上报的 呼叫事件启动不同的业务逻辑, 根据业务逻辑向相应的 SSP发出呼叫控制 指令, 从而实现各种智能呼叫; HLR是用户所在地的位置寄存器, 用于记 录用户的最新位置; MSC用于对位于其控制区内的移动用户进行通信控制 和管理,提供连接其他地区 MSC和众多基站的接口, 以及对移动用户呼叫 的接续和信息的交换; BSC负责网络资源管理、信道转换等多种控制功能。
如图 1所示, 当智能用户被叫时,通常会先触发提供用户信息(Provide
Subscriber Information, 简称 "PSI" )流程, 也就是说, MSC会先下发 PSI 寻呼, 在 PSI寻呼响应后, MSC再拆除与移动终端侧的连接。 PSI呼叫主 要是用于找到用户设备的当前位置 , 根据用户设备当前的位置可以确定通 话费率等, 如果该用户的预付费允许这次呼叫的建立, 才可以发起普通呼 叫, 因此, 这常用于对预付费用户的处理。 但是, 由于第二次的普通呼叫 并不一定会发生, 所以, PSI呼叫作为一^ ^意义上的呼叫, 在呼叫完成后立 即释放连接。
随后, 正常接续时会再次下发正常呼叫的寻呼消息, 移动终端回寻呼 响应后, 呼叫接通。 因此, 正常情况下每次智能用户作为被叫用户时, 会 进行两次寻呼。
在图 2所示的 WCDMA系统中智能用户作被叫用户时网络的寻呼流程 中, GMSC、 SCP、 HLR以及 MSC都与图 1中的相同, RNC为无线网络 控制器(Radio Network Controller, 筒称 "RNC" )。 该流程也与图 1所示的 流程基本相同, 当智能用户被叫时, 先触发 PSI流程, 也就是说, MSC会 先向 R C下发 PSI寻呼, 在 PSI寻呼响应后, MSC再向 RNC下发安全模 式的命令, 当 R C响应该安全模式后, MSC通过 Iu接口释放的命令与响 应拆除与移动终端侧的连接。 随后, 正常接续时会再次下发正常呼叫的寻 呼消息, 移动终端回寻呼响应后, 呼叫接通。 因此, 正常情况下每次智能 用户作为被叫用户时, 同样会进行两次寻呼。
而对移动终端侧而言, 在每一次的寻呼过程中, 移动终端都需要与网 络侧的基站建立无线信道连接, 在响应寻呼后, 移动终端为了能响应下一 次的寻呼消息, 需要从当前信道转换到寻呼信道, 因此移动终端需要释放 与网絡侧的基站所建立的无线信道连接, 移动终端侧的每一次寻呼处理流 程如图 3所示。 因此, 当智能用户作被叫用户时, 该移动终端在响应第一 次的 PSI寻呼时, 需要与网络侧的基站建立无线信道连接, 在 PSI寻呼响 应后, 释放该无线信道连接。 随后, 在正常接续时, 移动终端响应第二次 正常呼叫的寻呼消息, 在寻呼响应后, 呼叫接通。
以上所述的技术细节请参考文献 3GPP TS 29.002 中的 "Mobile Application Part (MAP) specification (移动应用部分明细)"、 3GPP TS 24.008 中的 " Mobile radio interface Layer 3 specification(移动无线接口层 3明细 ); Core network protocols 核心网络协议 ); Stage(阶段 )"以及 3GPP TS 25.413 中的 "UTRAN Iu interface RANAP signalling(UTRAN Iu接口无线接入网应 用部分信令)"。
但是, 由于移动终端在处理每一次的寻呼时, 都需要经过相当多的步 骤(如图 3所示), 并且, 智能用户作为被叫并能正常接续时, 网络侧发起 的两次寻呼过程的时间间隔非常短, 很多时候是 1秒左右, 因此, 对于某 些移动终端而言, 很可能无法在这很短的时间内完成第一次 PSI寻呼响应 时所建立的无线连接的释放过程, 从第一次寻呼响应时建立的无线信道上 转换到寻呼信道上, 也就无法立刻对第二次的普通呼叫寻呼进行响应, 需 要网络侧重发一次或多次寻呼后才能进行响应, 从而影响了后续的普通呼 叫的及时接通。 另外, 如果移动终端无法立刻响应第二次寻呼过程, 需要 网络侧多次下发寻呼才能响应的话, 不但加重了接入侧的负荷, 而且由于 每次寻呼过程中, 网络侧都需要进行寻呼、 接入、 鉴权等处理, 因此也浪 费了网络侧的资源。
发明内容
有鉴于此, 本发明的主要目的在于提供一种移动交换中心及其被叫处 理方法, 使得智能用户后续呼叫的寻呼成功率得到提高, 呼叫流程得到简 化。
为实现上述目的, 本发明提供了一种移动通信系统中被叫处理方法, 包含以下步骤:
在呼叫结束时, 如果该呼叫的类型与预置的呼叫类型一致, 则移动交 换中心保留该呼叫所使用的与被叫用户之间的连接, 否则幹放该连接; 当移动交换中心收到呼叫时, 如果当前保留有与该呼叫被叫用户之间 的连接, 则直接利用该连接继续呼叫过程, 否则通过寻呼与被叫用户终端 建立连接。
其中, 还包含以下步骤:
释放保留时间已超过预置门限的所述连接。
此外在所述方法中, 所述预置的呼叫类型是提供用户信息呼叫。
此外在所述方法中, 所述呼叫的类型包含:
语音业务寻呼、 短消息业务寻呼、 补充业务寻呼、 视频业务寻呼、 定 位业务寻呼以及提供用户信息寻呼。
此外在所述方法中, 所述移动通信系统包含全球移动通信系统和宽带 码分多址系统。
本发明还提供了一种移动交换中心, 用于对位于其控制区内的移动用 户进行通信控制和管理、 接续呼叫, 其中包含用于释放连接的连接释放模 块, 该移动交换中心还包含:
呼叫类型识别模块,用于判断呼叫的类型是否与预置的呼叫类型一致; 连接保留模块, 用于在呼叫结束时保留该呼叫所用到的与被叫用户之 间的连接;
当所述移动交换中心完成对呼叫的处理时, 所述呼叫类型识别模块判 断该呼叫的类型是否与预置的呼叫类型一致, 如果是则调用所述连接保留 模块保留该呼叫的连接, 供下一次对相同被叫用户的呼叫直接使用, 否则 调用所述连接释放模块释放该呼叫的连接。
其中, 还包含:
定时器, 用于在所述连接保留模块保留所述连接时启动, 并在超过预 置时长时调用所述连接释放模块释放该连接。
此外, 所述预置的呼叫类型是提供用户信息呼叫。
此外,所述移动交换中心属于全球移动通信系统或宽带码分多址系统。 通过比较可以发现, 本发明的技术方案与现有技术的主要区别在于, 对于智能用户, MSC在处理完呼叫后, 不是简单地释放连接, 而是增加了 对呼叫类型的判断, 如果是指定类型的呼叫, 例如 PSI呼叫, 则保留连接, 供对同一被叫用户的下一次呼叫使用。 连接的保留有一定的时限, 如果超 过时限仍没有对该被叫用户的下一次呼叫, 则释放该连接。
这种技术方案上的区别, 带来了较为明显的有益效果, 即因为可以利 用前一次呼叫所保留的连接, 所以可以避免在 ^艮短的时间段内连续发送两 次寻呼, 从而解决了部分类型的手机因 PSI寻呼响应时建立的 RR/RRC连 接未完全释放而导致不能立刻对后续的呼叫寻呼进行响应的问题, 提高后 续的普通呼叫的寻呼成功率。
将两次寻呼过程合为一次, 简化了呼叫流程, 缩短了呼叫的接续时间, 节省了网络侧和接入侧的资源, 减少了网络侧发给接入侧的寻呼消息, 减 少了接入侧的负荷。
附图说明 图 1是现有技术的 GSM系统中智能用户作被叫用户时网络的寻呼流程 示意图;
图 2是现有技术的 WCDMA系统中智能用户作被叫用户时网络的寻呼 流程示意图; 图 3是现有技术中移动终端侧处理每一次寻呼的流程示意图; 图 4是根据本发明的移动通信系统的被叫处理流程中系统在呼叫结束 时的流程原理图;
图 5是根据本发明的移动通信系统的被叫处理流程中系统在接收呼叫 时的流程原理图;
图 6是根据本发明的移动通信系统的被叫处理流程中系统内的 MSC的 结构示意图;
图 7是根据本发明第一实施方式的移动通信系统中被叫处理流程示意 图;
图 8是根据本发明第二实施方式的移动通信系统中被叫处理流程示意 图。
具体实施方式 为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本 发明作进一步地详细描述。
本发明的核心在于, 网络中的 MSC在处理完对智能用户的呼叫后, 并 不立即释放连接, 而是先对该呼叫的呼叫类型进行判断, 如果该呼叫是指 定类型的呼叫, 例如 PSI呼叫, 则保留连接并启动定时器, 供对同一被叫 用户的下一次呼叫使用, 当连接的保留时间超过预置门限, 也就是定时器 超时时, 仍没有对该被叫用户的下一次呼叫, 则释放该连接; 如果该呼叫 不是指定类型的呼叫, 则释放连接。 因此, 当 MSC收到呼叫时, 可以先查 看当前是否保留有与该呼叫被叫用户之间的连接, 如果有, 则直接利用该 连接继续呼叫过程, 否则通过寻呼与被叫用户终端建立连接。 所以, 本发 明可以避免在很短的时间段内连续向同一个被叫用户发送两次寻呼 , 提高 了智能用户后续呼叫的寻呼成功率, 筒化了呼叫流程。
本发明的原理如图 4和图 5所示。 图 4是本发明的移动通信系统的被 叫处理流程中系统在呼叫结束时的流程原理图; 图 5是本发明的移动通信 系统的被叫处理流程中系统在接收到呼叫时的流程原理图。 由于在本发明 的移动通信系统中, 用于对位于其控制区内的移动用户进行通信控制和管 理、接续呼叫的 MSC除了包含连接释放模块夕卜,还包含呼叫类型识别模块、 连接保留模块和定时器等新增模块, 因此, 下面先对本发明中 MSC的结构 进行说明。
本发明中 MSC的结构如图 6所示, 在 MSC中包含呼叫类型识别模块 1、 连接 #放模块 2、 连接保留模块 3、 以及定时器 4。 其中, 呼叫类型识 别模块 1用于判断呼叫的类型是否与预置的呼叫类型一致; 连接保留模块 3 用于在呼叫结束时保留该呼叫所用到的与被叫用户之间的连接; 连接释 放模块 2用于幹放连接; 定时器 4用于在所述连接保留模块保留所述连接 时启动, 并在超过预置时长时调用所述连接释放模块释放该连接。 MSC中 这些模块相互间的调用将在下面的各流程中进行说明。
下面先对本发明的移动通信系统的被叫处理流程中系统在呼叫结束时 的流程进行说明。
如图 4所示,在步骤 410中,移动通信系统中的 MSC判断呼叫类型是 否与预置类型一致。 具体地说, 当 MSC在处理完对智能用户的呼叫时, 先 判断该呼叫的类型是否与预置的呼叫类型一致。 如果该呼叫的类型与预置 的呼叫类型一致, 则进入步骤 420, 保留连接并启动定时器; 如果该呼叫 的类型与预置的呼叫类型不一致, 则直接进入步骤 440, 释放该呼叫所建 立的连接。 其中, 预置的呼叫类型可以是 PSI呼叫。
在步驟 420中, MSC保留连接并启动定时器。 具体地说, 当 MSC中 的呼叫类型识别模块在经判断得出该呼叫的类型与预置的呼叫类型一致 后,调用 MSC中的连接保留模块保留该呼叫的连接,供下一次对相同被叫 用户的呼叫直接使用, 同时, 启动 MSC中的定时器。
接着, 进入步骤 430, MSC判断连接的保留时间是否超过预置门限。 也就是说, MSC通过定时器控制连接的保留时间。 当连接保留模块所保留 连接超过预置的时长时, 也就是定时器超时时, 进入步骤 440, 释放连接。
在步驟 440中, MSC幹放连接。 如果在步骤 410中, 呼叫类型识別模 块经判断得出该呼叫的类型与预置的呼叫类型不一致而进入到本步骤, 则 MSC通过调用连接释放模块直接释放该呼叫所建立的连接; 如果呼叫类型 识别模块经判断得出该呼叫的类型与预置的呼叫类型一致, 则当定时器超 时时, MSC通过调用连接释放模块释放该呼叫所建立的连接。 下面再对本发明的移动通信系统的被叫处理流程中系统在接收到呼叫 时的流程进行说明。
如图 5所示, 在步骤 510中, MSC在接收到呼叫时, 首先查看当前是 否保留有与该呼叫被叫用户之间的连接, 如果有, 则进入步骤 520, 直接 利用该连接继续呼叫过程; 如果没有, 则进入步骤 530, 通过寻呼与被叫 用户终端建立连接。 MSC接收到的呼叫类型可以是语音业务寻呼、 短消息 业务寻呼、 补充业务寻呼、 视频业务寻呼、 定位业务寻呼以及 PSI寻呼等 等。
在步骤 520中, MSC利用该连接继续呼叫过程。 由于 MSC在预置类 型的呼叫结束时, 不会直接释放所建立的连接。 因此, MSC在接收到语音 业务寻呼、 短消息业务寻呼、 补充业务寻呼、 以及 PSI寻呼之类的呼叫类 型后, MSC当前可能(在定时器不超时的情况下)仍保留有与该呼叫被叫 用户之间的连接, 所以, MSC无需下发寻呼消息, 可以直接利用该连接继 续该呼叫过程。
在步骤 530中, MSC建立与该呼叫被叫用户之间的连接。 如果 MSC 当前没有保留与该呼叫被叫用户之间的连接, 则通过下发寻呼消息与被叫 用户终端建立连接。
本发明的第一实施方式移动通信系统中被叫处理流程如图 7所示, 在 本实施方式中, 所述移动通信系统为 GSM, 预置的呼叫类型为 PSI呼叫。
在智能用户被叫后, 进入步驟 701 中, GMSC接收到起始地址消息
( Initial Address Message, 简称 "IAM" )。
在步骤 702中, GMSC向 HLR发送路由信息 ( Send Routing Info, 简 称 "SRT,)。
在步骤 703中, HLR向 MSC下发 PSI呼叫。
在步骤 704中, MSC向 BSC下发寻呼消息。
在步驟 705中, BSC向 MSC响应寻呼。
步骤 701至步骤 705与现有技术完全相同。 MSC在得到 PSI寻呼的响 应后,也就是 MSC在处理完对智能用户的呼叫后,通过呼叫类型识别模块 对该呼叫的类型是否与预置的呼叫类型一致进行判断。 由于在本实施方式 中, 预置的呼叫类型为 PSI呼叫, 因此, 呼叫类型识别模块可以获知该呼 叫的类型与预置的呼叫类型一致, 所以, MSC并不立即释放连接, 而是通 过连接保留模块保留与被叫用户的连接, 同时启动定时器, 直到所保留的 连接超过预置的时长时, 也就是定时器超时时, 才通过调用连接释放模块 释放该连接。 比如说, 预置的时长为 3秒, 那么, MSC将与被叫用户的连 接保留 3秒后, 定时器超时, 并在超时时调用连接译放模块释放该连接。
在步驟 706中, MSC向 HLR响应 PSI呼叫。
在步骤 707中, HLR向 GMSC响应 SRL
在步骤 708中, GMSC向 SCP下发起始的数据分组( Data Packet, 简 称 "DP" )。
在步骤 709中, SCP向 GMSC执行接续步骤。
在步驟 710中, GSMC再次向 HLR下发 SRL
在步骤 711中, HLR向 MSC提供漫游号码 ( Provide Roaming Number, 筒称 "PRN" )。
在步骤 712中, MSC向 HLR响应 PRN。
在步驟 713中, HLR向 GMSC响应 SRL
在步骤 714中, GMSC向 MSC下发 IAM。
步骤 706至步骤 714与现有技术相同。 MSC在接收到 IAM后, 并不 立即下发寻呼消息,而是先查看当前是否保留有与该呼叫被叫用户的连接。 一般而言, 智能用户作为被叫时, 大多数情况下都能正常接续, 也就是说, PSI呼叫后面绝大多数情况下都有后续的呼叫,并且, 两次呼叫的时间间隔 非常短, 很多时候是 1秒左右。 因此, 不会超出定时器所预置的时长。 也 就是说, 此时 MSC仍保留有与该呼叫被叫用户的连接。
接着, 进入步驟 715, MSC直接利用建立的无线信道。
在步骤 716中, BSC向 MSC发送呼叫确认。
在步骤 717中, BSC向 MSC发信号。
在步骤 718中, MSC向 GMSC发送地址完成消息 ( Address Complete Message, 筒称 "ACM" )。
在步骤 719中, GMSC再将接收到的 ACM发送出去。 从而建立了主 叫用户与被叫用户的连接, 使得主叫用户与被叫用户之间可以通信。
由此可见, 当智能用户作为被叫用户时, MSC利用前一次呼叫所保留 的连接, 将两次寻呼过程合为一次, 简化了呼叫流程, 缩短了呼叫的接续 时间 , 节省了网络侧和接入侧的资源, 减少了网络侧发给接入侧的寻呼消 息, 减少了接入侧的负荷。 同时, 由于避免了在艮短的时间段内连续发送 两次寻呼, 从而解决了部分类型的手机因 PSI寻呼响应时建立的 R /R C 连接未完全释放而导致不能立刻对后续的普通呼叫寻呼进行响应的问题, 提高后续的普通呼叫的寻呼成功率。
本发明的第二实施方式移动通信系统中被叫处理流程如图 8所示, 本 实施方式与第一实施方式基本相同, 不同之处仅在于应用的移动通信系统 不同, 在第一实施方式中, 应用的移动通信系统是 GSM, 而在本实施方式 中, 应用的移动通信系统为 WCDMA。 但是, MSC利用前一次呼叫所保留 的连接, 将两次寻呼过程合为一次过程与第一实施方式完全相同, 因此, 本实施方式也完全可以达到第一实施方式的作用和效果。 下面简单说明一 下相关的步骤:
步骤 801到 805与步骤 701到 705相对应。 在 WCDMA相对于 GSM 增加了安全模式的相关交互, 即步驟 806和 807。 步驟 808到 821分别与 步骤 706到 719相对应。
虽然通过参照本发明的某些优选实施方式, 已经对本发明进行了图示 和描述, 但本领域的普通技术人员应该明白, 可以在形式上和细节上对其 作各种改变, 而不偏离本发明的精神和范围。

Claims

权 利 要 求
1. 一种移动通信系统中被叫处理方法, 其特征在于, 包含以下步骤: 在呼叫结束时, 如果该呼叫的类型与预置的呼叫类型一致, 则移动交 换中心保留该呼叫所使用的与被叫用户之间的连接, 否则释放该连接; 当移动交换中心收到呼叫时, 如果当前保留有与该呼叫被叫用户之间 的连接, 则直接利用该连接继续呼叫过程, 否则通过寻呼与被叫用户终端 建立连接。
2.根据权利要求 1所述的移动通信系统中被叫处理方法,其特征在于, 还包含以下步驟:
释放保留时间已超过预置门限的所述连接。
3. 根据权利要求 1或 2所述的移动通信系统中被叫处理方法, 其特征 在于, 所述预置的呼叫类型是提供用户信息呼叫。
4. 根据权利要求 1或 2所述的移动通信系统中被叫处理方法, 其特征 在于, 所述呼叫的类型包含:
语音业务寻呼、 短消息业务寻呼、 补充业务寻呼、 视频业务寻呼、 定 位业务寻呼以及提供用户信息寻呼。
5. 根据权利要求 1或 2所述的移动通信系统中被叫处理方法, 其特征 在于, 所述移动通信系统包含全球移动通信系统和宽带码分多址系统。
6. 一种移动交换中心, 用于对位于其控制区内的移动用户进行通信控 制和管理、 接续呼叫, 其中包含用于释放连接的连接释放模块, 其特征在 于, 该移动交换中心还包含:
呼叫类型识别模块,用于判断呼叫的类型是否与预置的呼叫类型一致; 连接保留模块, 用于在呼叫结束时保留该呼叫所用到的与被叫用户之 间的连接;
当所述移动交换中心完成对呼叫的处理时, 所述呼叫类型识别模块判 断该呼叫的类型是否与预置的呼叫类型一致, 如果是则调用所述连接保留 模块保留该呼叫的连接, 供下一次对相同被叫用户的呼叫直接使用, 否则 调用所述连接释放模块释放该呼叫的连接。
7. 根据权利要求 6所述的移动交换中心, 其特征在于, 还包含: 定时器, 用于在所述连接保留模块保留所述连接时启动, 并在超过预 置时长时调用所述连接释放模块释放该连接。
8. 根据权利要求 6或 7所述的移动交换中心, 其特征在于, 所述预置 的呼叫类型是提供用户信息呼叫。
9. 根据权利要求 6或 7所述的移动交换中心, 其特征在于, 所述移动 交换中心属于全球移动通信系统或宽带码分多址系统。
PCT/CN2006/002137 2005-11-29 2006-08-22 Centre de communication mobile et procede de traitement d'appels WO2007062560A1 (fr)

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CNA2006800123310A CN101161019A (zh) 2005-11-29 2006-08-22 移动交换中心及其被叫处理方法
AT06775455T ATE450993T1 (de) 2005-11-29 2006-08-22 Msc und zugehöriges anrufverwaltungsverfahren
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CN102802276B (zh) * 2012-08-08 2014-11-19 中国联合网络通信集团有限公司 Iu释放定时器的配置方法及装置
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