WO2006005261A1 - Procede de traduction d'un appel a un service telephonique ip et systeme correspondant - Google Patents

Procede de traduction d'un appel a un service telephonique ip et systeme correspondant Download PDF

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Publication number
WO2006005261A1
WO2006005261A1 PCT/CN2005/001036 CN2005001036W WO2006005261A1 WO 2006005261 A1 WO2006005261 A1 WO 2006005261A1 CN 2005001036 W CN2005001036 W CN 2005001036W WO 2006005261 A1 WO2006005261 A1 WO 2006005261A1
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WIPO (PCT)
Prior art keywords
network
voip
cdma2000
msc
hrpd
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PCT/CN2005/001036
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English (en)
French (fr)
Inventor
Shoubo Xie
Ying Tan
Bin Gan
Quanzhong Gao
Tianzhen Huang
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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.
Publication of WO2006005261A1 publication Critical patent/WO2006005261A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10Architectures or entities
    • H04L65/102Gateways
    • H04L65/1033Signalling gateways
    • H04L65/104Signalling gateways in the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10Architectures or entities
    • H04L65/102Gateways
    • H04L65/1023Media gateways
    • H04L65/103Media gateways in the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/02Inter-networking arrangements

Definitions

  • the present invention relates to the field of mobile communication technologies, and more particularly to a method and system for converting a cdma2000 lx call into an Internet Protocol (IP) voice service.
  • IP Internet Protocol
  • the cdma2000 lx technology supports voice and data services over a standard ( lx ) code division multiple access (CDMA ) channel and has many superior features over other technologies. Its capacity is close to twice the capacity of previous CDMA systems, enabling it to adapt to the growing demand for voice services and new wireless Internet services. At the same time, its maximum speed can reach 153kbps, and there is no need to sacrifice speech performance for data performance.
  • CDMA code division multiple access
  • cdma2000's data-optimized version of lx EX-DO can exceed 2Mbps and throughput exceeds 700kbps, which is comparable to wired DSL services. Can support applications with more stringent speed requirements, such as image transmission, large file downloads, etc.
  • Cdma2000 lx EV-DO also transmits data at the lowest cost per megabyte, which is a very important factor in promoting the popularity of wireless internet. Lx EV-DO will provide 24/7 network connectivity, making wireless network access easier, faster and more practical.
  • the cdma2000 lx system In the wireless cellular system, as the benefits of operators' CDMA users increase and the demand of users increases, the cdma2000 lx system is limited by bandwidth and speed in carrying out high-speed data services, and will introduce high-speed packet data service (HRPD) system to support high-speed. Data business.
  • HRPD packet data service
  • the HRPD system In general, in order to support both voice and data services, the HRPD system will overlay the cdma2000 lx system, and the dual-mode terminal will become the main means to achieve Han network coverage.
  • the HRPD protocol defines voice priority. When users perform data services in the HRPD network, they must be able to receive voice paging from the cdma2000 lx system.
  • the cdma2000 lx/HRPD dual-mode terminal in the HRPD Rel.O system must perform the data service in the HRPD network at the same time as the paging message of the cdma2000 lx network, and the paging cycle should be changed every 1.28 seconds.
  • the cdma2000 lx network listens to the paging channel of the cdma2000 lx network to determine whether there is a paging message. If there is a paging message, the user will respond to the cdma2000 lx paging and establish a traffic channel in the cdma2000 lx system. If there is no paging message, it returns to the HRPD network and continues the ongoing data service.
  • the HRPD ReL.A version of the air interface protocol has made some improvements to the above part, which can allow the cdma2000 lx paging message to be forwarded through the HRPD network, so that the dual mode terminal can switch to cdma2000 lx without having to cycle every cdma2000 lx paging cycle.
  • the paging channel is monitored in the network, and the voice paging message from the cdma2000 lx network is directly received in the HRPD network. If there is a cdma2000 lx voice paging message, the terminal switches to the cdma2000 lx network and responds to cdma2000 lx voice paging. After the voice ends, it can return to the HRPD network to continue the ongoing data service. If there is no cdma2000 lx voice paging for the user, the dual mode terminal does not need to switch to the cdma2000 lx network.
  • the dual-mode terminal is in the dual-network coverage area. As long as the voice paging of the cdma2000 lx is received, the terminal must switch to the cdma2000 lx network regardless of whether the user answers the call.
  • the ongoing service in the HRPD network is forcibly switched to sleep (Dormant) ) state. Due to the long switching time between dual networks, this delay-sensitive service, such as Voice over IP (VoIP), Video Phone PTT, streaming media, etc., have a huge impact. If the user switches to the c'dma2000 lx network for a long time, the HRPD data service suspension time may be interrupted beyond the time set by the HRPD network Dormant timer.
  • an object of the present invention is to provide a system for converting a call into an IP voice service, so that a dual mode terminal user does not have to switch to a cdma2000 lx network when receiving a cdma2000 lx page in the HRPD network.
  • the call is to ensure that the data service that the user is performing in the HRPD network is not interrupted.
  • the method for converting a call into an IP voice service is applied to a dual-mode network including cdma2000 lx and HRPD, and the method includes: after the dual-mode terminal switches between cdma2000 lx and HRPD, the cdma2000 lx network
  • the MSC/VLR in the location registration also includes:
  • step B After receiving the call request containing the called subscriber number, the MSC determines whether the called terminal is in the HRPD network, and if yes, step B;
  • the MSC obtains the corresponding VoIP address according to the VoIP number set by the called terminal, and addresses the corresponding VoIP gateway according to the VoIP address, and performs IP voice service in the HRPD network.
  • the method further includes: Al, storing, in the MSC, a correspondence between the user number of the dual-mode terminal in the cdma2000 lx network and the VoIP number;
  • the steps of the VoIP address corresponding to the called terminal in step B are:
  • the MSC determines the corresponding VoIP number from step A1 according to the user number of the dual mode terminal. Then, the VoIP address corresponding to the VoIP number is obtained from the correspondence between the VoIP number and the VoIP address stored in the HLR.
  • Step A1 includes:
  • the dual-mode terminal in the idle state of the HRPD network sends an unconditional call forwarding registration message to the AN in the HRPD, which carries the VoIP number to be transferred;
  • the HRPD AN After receiving the registration message of the unconditional call transfer, the HRPD AN sends an unconditional call forwarding setting message to the MSC, and after receiving the unconditional call forwarding setting message of the dual mode terminal, the MSC saves the user of the dual mode terminal in the cdma2000 lx network.
  • Step A1 includes:
  • A12K is a dual-mode terminal in the cdma2000 lx network, and sends an unconditional call forwarding setting message to the MSC during the handover of the cdma2000 lx network to the HRPD network, where the VoIP number corresponding to the call forwarding is included;
  • the MSC After receiving the unconditional call transfer setup message of the user, the MSC saves the user number of the dual mode terminal in the cdma2000 lx network and the VoIP number corresponding to the call transfer.
  • the step of connecting the AN in the HRPD network to the MSC in the cdma2000 lx network, and the step of obtaining the VoIP address corresponding to the called terminal in the step B includes:
  • the MSC sends a paging message to the dual-mode terminal through the HRPD AN. After receiving the paging message, the dual-mode terminal returns a paging response to the MSC through the HRPD AN.
  • the MSC After receiving the paging response, the MSC sends the calling number to the dual mode terminal.
  • the dual mode terminal displays the calling number, and determines whether the user inputs the call forwarding instruction and the VoIP number, and if so, sends the call forwarding instruction and the VoIP number input by the user to the MSC; B4.
  • the MSC obtains the VoIP address corresponding to the VoIP number from the correspondence between the VoIP number and the VoIP address saved in the HLR.
  • the called terminal In the process of performing IP voice service in the HRPD network, if the VoIP/Video Telephony VT/Push-to-Talk PTT delay-sensitive service is activated in the HRPD network, the called terminal returns to the called busy and rejects the call; The called terminal rings and completes the VoIP call.
  • the location registration of the MSC VLR in the cdma2000 lx network is initiated by the silent mode terminal.
  • a system for transferring a call to an Internet Protocol IP voice service is provided by the present invention:
  • the MSC VLR is configured to save the current location information of the user terminal. After receiving the call request containing the called number, determine whether the called terminal is in the HRPD network according to the location information saved by itself, and if yes, set according to the called terminal. The VoIP number obtains a corresponding VoIP address, and routes the call to the corresponding VoIP gateway according to the VoIP address;
  • a VoIP gateway configured to convert a cdma2000 lx voice call into a packet domain VoIP call, and send the converted VoIP call of the packet domain to the HRPD network, and the HRPD network sends the call to the called terminal to implement the IP voice service.
  • the MSC When the called terminal switches from the cdma2000 lx to the HRPD network, and sends an unconditional call forwarding setup message to the MSC before leaving the cdma2000 lx network, where the VoIP number needs to be transferred, the MSC is further used to save the user.
  • the AN in the HRPD network is connected to the MSC in the cdma2000 lx network.
  • the AN in the HRPD is further configured to send an unconditional call transfer setup message to the MSC by sending a registration message of the unconditional call transfer containing the VoIP number to be transferred sent by the dual mode terminal receiving the idle state;
  • the MSC is further configured to: after receiving the unconditional call forwarding setup message of the dual mode terminal, save the correspondence between the user number of the dual mode terminal in the cdma2000 lx network and the VoIP number.
  • the present invention supports data and voice concurrency in the HRPD network, and converts the cdma2000 lx voice call into a VoIP call of the HRPD network, so that the silent mode terminal user does not have to switch to the cdma2000 lx network to listen to the paging, but still does not need to switch to the cdma2000 lx network to listen to the paging.
  • the method can greatly reduce the power consumption of the terminal ( ⁇ , and since it is not necessary to periodically switch to the cdma2000 lx network, the ongoing data service in the HRPD network will not be interrupted when there is no cdma2000 lx voice call, the service of the service Quality (QoS) will also be greatly improved.
  • QoS service Quality
  • FIG. 1 is a schematic diagram of a network architecture of a cdma2000 lx/HRPD dual network convergence in the prior art
  • FIG. 2 is a schematic diagram of a network framework of the improved cdma2000 lx/HRPD dual network convergence
  • FIG. 3 is a flowchart of a specific embodiment of the method of the present invention.
  • FIG. 4 is a schematic flow chart of a second embodiment of a method for implementing the method of the present invention.
  • FIG. 5 is a schematic diagram of a third embodiment of a specific embodiment of the method of the present invention.
  • the core content of the present invention is: the dual-mode terminal performs location registration on the MSC/VLR in the cdma2000 lx network; after receiving the call request containing the called subscriber number, the MSC determines whether the called terminal is in the HRPD network according to the record in the MSC VLR. If yes, the MSC obtains the VoIP address that the called terminal needs to transfer, and addresses the corresponding VoIP gateway (GW) according to the VoIP address to implement the IP voice service. If not, the normal business process is performed.
  • GW VoIP gateway
  • the cdma2000 lx call is converted into a VoIP call, and the dual-mode terminal can directly set its own corresponding VoIP number in the MSC, which is called "unconditional call transfer". Called by the called user during the call. Dynamically set according to the calling number, called "conditional call transfer".
  • the MSC needs to obtain the VoIP address from the HLR according to the VoIP number that the called user terminal needs to transfer, and then can address the VoIP gateway, and the VoIP gateway will then cdma2000.
  • the lx voice call is converted into a VoIP call in the packet domain to implement IP voice services.
  • the system of the present invention includes cdma2000 lx and HRPD.
  • the MSC in the cdma2000 lx network is connected to a PDSN (Packet Data Serving Node) in the HRPD network through a VoIP gateway.
  • PDSN Packet Data Serving Node
  • the MSC/VLR is configured to save the current location information of the user terminal, and after receiving the call request containing the called number, determine whether the called terminal is in the HRPD network according to the location information saved by itself, and if yes, according to the called party
  • the VoIP number set by the terminal acquires the corresponding VoIP address, and routes the call to the corresponding VoIP gateway according to the VoIP address;
  • the VoIP gateway which converts the voice call of the cdma2000 lx into a VoIP call of the packet domain, and converts the converted
  • the VoIP call of the packet domain is sent to the PDSN, and the PDSN sends the call to the called terminal to implement the IP voice service.
  • the MSC when the called terminal switches from the cdma2000 lx to the HRPD network, and Before leaving the cdma2000 lx network, sending an unconditional call forwarding setup message to the MSC, which contains the VoIP number to be transferred, the MSC further stores the correspondence between the user number of the user on the cdma2000 lx network and the VoIP number.
  • the present invention can also connect an AN in the HRPD network with an MSC in a cdma2000 lx network.
  • the AN in the HRPD is further used to send an unconditional call transfer setup message to the MSC in the registration message of the unconditional call transfer containing the VoIP number to be transferred sent by the dual mode terminal receiving the idle state; the MSC receives the double After the unconditional call forwarding setting message of the mode terminal, the correspondence between the user number of the dual mode terminal in the cdma2000 lx network and the VoIP number is saved.
  • the process of unconditional call forwarding setting may include two types, one is to connect the MSC in the cdma2000 lx network and the AN/PCF in the HRPD network in the improved network architecture shown in FIG. 2, for example, As shown in FIG. 2, this networking mode sets its own corresponding VoIP number in the MSC through the HRPD AN by the dual mode terminal in the idle state of the HRPD network.
  • the dual-mode terminal in the cdma2000 lx network sets its own VoIP number in the MSC during the handover process from the cdma2000 lx network to the HRPD network.
  • the method of the present invention is mainly described below with the network architecture shown in FIG.
  • an interface is added between the MSC in the cdma2000 lx network and the AN/PCF in the HRPD network to forward the paging message of the cdma2000 lx in the HRPD network.
  • Step 301 A dual mode terminal in an idle state of the HRPD network sends the HRPD AN A registration message for unconditional call forwarding, which carries the VoIP number corresponding to itself.
  • Step 302 After receiving the registration message of the unconditional call transfer, the HRPD AN sends an unconditional call forwarding setting message to the MSC, and after receiving the unconditional call forwarding setting message of the Chinese model terminal, the MSC saves the VoIP number of the dual mode terminal. Indicates that the call forwarding feature has been activated by the user.
  • Step 303 After the MSC receives the call request, the MSC determines whether it saves the VoIP number of the called user. If yes, it determines that the user activates the call forwarding function, and obtains the VoIP number corresponding to the called user. 304, otherwise, jump out of this process.
  • Step 304 The MSC obtains the VoIP address corresponding to the called user from the HLR according to the VoIP number corresponding to the called user, and then addresses the corresponding VoIP gateway according to the VoIP address, and the VoIP gateway converts the cdma2000 lx voice call into the packet VoIP. Call, realize IP voice service. If the called terminal currently has an active VoIP/Video Telephony (VT)/Push-to-Talk (PTT) delay-sensitive service for the HRPD network, the called terminal returns the called busy information to cdma lx, rejecting the Call; otherwise, the called terminal rings to complete the VoIP call.
  • VT Voice/Video Telephony
  • PTT Push-to-Talk
  • the MSC obtains the corresponding VoIP address according to the VoIP number, which is the same as the addressing process in the prior art cdma2000 1 x network.
  • Step 401 The MSC sends a paging message to the called terminal through the HRPD AN.
  • Step 402 After receiving the paging message, the called terminal returns a paging response to the MSC through the HRPD AN.
  • Step 403 After receiving the paging response, the MSC sends the calling number to the called terminal through the HRPD AN.
  • Step 404 After the called terminal receives the calling number, the calling number is displayed, and the judgment is used. Whether the user inputs the call forwarding instruction and the VoIP number. If yes, the user inputs the call forwarding instruction and the VoIP number to the MSC, and then performs step 405; otherwise, the flow is skipped.
  • Step 405 The MSC obtains a corresponding VoIP address from the HLR according to the VoIP number set by the user, and then addresses the corresponding VoIP gateway according to the VoIP address, and the VoIP gateway converts the voice call of the cdma2000 lx into a VoIP call of the packet domain, and further IP voice services are performed in the HRPD network. If the called terminal currently has an active VoIP/VT/PTT delay-sensitive service of the HRPD network, the called terminal returns information rejecting the call to the cdma2000 lx; otherwise, the called terminal rings to complete the VoIP call.
  • the user can also enter another number as the destination number for the call transfer. If the destination number of the call transfer is a normal number, the normal call flow will be performed after the MSC call is transferred instead of the VoIP process.
  • the MSC when the user switches in the cdma2000 lx/HRPD network, in order to ensure that the user can be paged, the MSC must know in real time which network the user is in. Therefore, after the user switches from the HRPD network to the cdma2000 lx network, or after switching back to the HRPD network from the cdma2000 lx network, the terminal can initiate the location registration process.
  • the above method is to modify the existing network framework to implement IP voice services.
  • the present invention can also be implemented directly on the existing network framework shown in FIG.
  • Step 501 The dual-mode terminal in the cdma2000 lx network sends an unconditional call forwarding setting message to the MSC when moving to the HRPD network coverage area and preparing to switch to the HRPD network, and before leaving the cdma2000 lx network, where the transfer destination number is The VoIP number of this machine;
  • Step 502 After receiving the unconditional call forwarding setting message of the user, the MSC saves The user number of the user on the cdma2000 lx network and the VoIP number of the user indicate that the user has activated the call forwarding function;
  • Step 503 The dual-mode terminal performs a handover process to complete handover of the cdma2000 lx network to the HRPD network.
  • Step 504 After receiving the call request containing the called user number, the MSC determines, according to the called number, whether the user activates the call forwarding function, and then performs step 505. If yes, otherwise, the process is skipped;
  • Step 505 The MSC obtains a corresponding VoIP address from the HLR according to the transfer number set by the user, and then the VoIP address is addressed to the corresponding VoIP gateway, and the VoIP gateway converts the cdma2000 lx voice call into a VoIP call in the packet domain, and then in the HRPD. IP voice services are carried out in the network.
  • the called terminal if the called terminal currently has an active VoIP/VT/PTT delay-sensitive service of the HRPD network, the called terminal returns the called busy to the cdma2000 lx, rejecting the call; otherwise, the terminal rings and completes the VoIP. call.
  • the MSC when the user switches in the cdma2000 lx/HRPD network, in order to ensure that the user can be paged, the MSC must know the dual mode terminal user in real time. Whether it is in the cdma2000 lx network, you can consider borrowing the location registration process. After the user switches back to the cdma2000 lx network from the HRPD network, the terminal initiates a location registration process. When the user switches from the cdma2000 lx network to the HRPD network, because there is no interface between the HRPD AN and the MSC, the dual-mode terminal can perform the location registration operation.
  • the MSC can consider the terminal.
  • the MSC can directly transfer the voice call of the cdma2000 lx network to the dual mode terminal to the VoIP call of the HRPD network.

Description

一种将呼叫转移为因特网协议语音业务的方法和系统 技术领域
本发明涉及移动通信技术领域, 特别是指一种将 cdma2000 lx呼叫 转换为因特网协议(IP )语音业务的方法和系统。 发明背景
cdma2000 lx技术通过一个标准的 ( lx )码分多址(CDMA )频道 能够支持语音和数据服务, 并具有许多比其他技术更为优越的性能。 其 容量接近于以前 CDMA 系统容量的两倍, 从而能够适应不断成长的语 音服务和无线互联网新型服务的需要。 同时, 其最高速度可以达到 153kbps, 并且无须为了数据性能而牺牲语音性能。
对于希望获得更加快速或者更大容量的数据处理服务的用户来讲, cdma2000的数据优化版本一 lx EX-DO的最高速度能够超过 2Mbps, 吞 吐量超过 700kbps, 它能够与有线 DSL服务相 美, 还可以支持对速度 要求更加严格的应用, 如影像传输、 大型文件下载等。 cdma2000 lx EV-DO还以每兆字节最低的成本传输数据,这是促进无线互联网络普及 的一个非常重要的因素。 lx EV-DO将提供全天候的网络连接, 从而使 无线网络访问更加容易、 快速和实用。
无线蜂窝系统中,随着运营商 CDMA用户的曰益增加和用户需求的 增加, cdma2000 lx系统在开展高速数据业务中受到带宽和速率的限制, 将会引入高速分组数据业务(HRPD ) 系统支持高速数据业务。 一般情 况下, 为了同时支持语音和数据业务, HRPD系统会和 cdma2000 lx系 统叠加覆盖,双模终端将成为实现汉网覆盖的主要手段。对于双模终端, HRPD协议定义语音优先, 用户在 HRPD网络中进行数据业务的同时, 必须能够接听来自 cdma2000 lx系统的语音寻呼
如图 1所示的网络框架中, HRPD Rel.O系统中 cdma2000 lx/HRPD 双模终端在 HRPD网络进行数据业务的同时, 必须按照 cdma2000 lx网 络的寻呼消息定时, 每 1.28 秒寻呼周期转到 cdma2000 lx 网络监听 cdma2000 lx网络的寻呼信道, 判断是否有自己的寻呼消息, 如果有寻 呼消息, 用户将响应 cdma2000 lx寻呼, 并在 cdma2000 lx系统建立业 务信道。 如果没有寻呼消息, 则返回 HRPD网络, 继续正在进行的数据 业务。
HRPD ReL.A版本空口协议对上述部分作了一定的改进, 可以允许 通过 HRPD网络转发 cdma2000 lx的寻呼消息, 这样双模终端就可以不 必在每个 cdma2000 lx的寻呼周期都切换到 cdma2000 lx网络中监听寻 呼信道, 而直接在 HRPD网络中接收到来自 cdma2000 lx网络的语音寻 呼消息。 如杲有 cdma2000 lx语音寻呼消息, 终端切换到 cdma2000 lx 网络, 响应 cdma2000 lx语音寻呼, 语音结束后可以返回 HRPD网络继 续正在进行的数据业务。 如果没有该用户的 cdma2000 lx语音寻呼, 则 该双模终端无需切换到 cdma2000 lx网络。
HRPD Rel.A的改进减少了终端切换到 cdma2000 lx网络的频率,使 得终端的耗电量降低,同时由于减少了切换到 cdma2000 lx网络的频率, HRPD网络数据业务的 Qos也得到一定改善。 但是, Rel.A仍然存在如 下缺点:
双模终端在双网覆盖区域, 只要接收到 cdma2000 lx的话音寻呼, 无论用户是否接听,终端都必需切换到 cdma2000 lx网络,用户在 HRPD 网络中正在进行的业务会被强制切换到休眠(Dormant ) 态。 由于双网 间切换的时间很长, 这对时延敏感型业务, 如 IP语音(VoIP )、 Video Phone PTT、 流媒体等, 影响非常大。 如果用户切换到 c'dma2000 lx网 络的时间较长, 可能会造成 HRPD数据业务挂起时间超过 HRPD网络 Dormant定时器设置的时间而中断, 即使用户返回 HRPD网络, 仍然无 法继续用户原来在 HRPD网络正在进行的数据业务。 所以, 目前 HRPD 的协议对于双模终端接听 cdma2000 lx话音呼叫的处理很不完善, 不利 于 HRPD网络的业务开展。 发明内容
有鉴于此,本发明的目的在于提供一种将呼叫转换为 IP语音业务的 方法的系统,使得双模终端用户驻留在 HRPD网络中接收到 cdma2000 lx 寻呼时, 不必切换到 cdma2000 lx网络进行通话, 以保证不中断用户正 在 HRPD网络中进行的数据业务。
本发明提供的一种将呼叫转换为 IP语音业务的方法, 应用于包含 cdma2000 lx和 HRPD的双模网络中,该方法包括:双模终端在 cdma2000 lx与 HRPD之间切换后,在 cdma2000 lx网络中的 MSC/VLR进行位置 登记, 还包括:
A. MSC收到含有被叫用户号码的呼叫请求后, 判断被叫终端是否 处于 HRPD网络, 如果是, 执行步骤 B;
B. MSC根据被叫终端设置的 VoIP号码获取对应的 VoIP地址, 并 根据该 VoIP地址寻址到对应的 VoIP网关, 在 HRPD网络中进行 IP语 音业务。
在步骤 A之前, 进一步包括: Al、 在 MSC 中保存双模终端在 cdma2000 lx网络的用户号码以及 VoIP号码的对应关系;
步骤 B中所述被叫终端对应的 VoIP地址的步骤是:
MSC根据双模终端的用户号码从步骤 A1中确定对应的 VoIP号码, 再从 HLR中保存的 VoIP号码和 VoIP地址的对应关系, 获取该 VoIP号 码对应的 VoIP地址。
将 HRPD网络中的接入网 AN和 cdma2000 lx网络中的 MSC相连 接, 步骤 A1包括:
All l、处于 HRPD网络的空闲态的双模终端, 向 HRPD中的 AN发 送无条件呼叫转移的登记消息, 其中携带需要转移的 VoIP号码;
A112、 HRPD AN收到该无条件呼叫转移的登记消息后, 向 MSC发 送无条件呼叫转移设置消息, MSC接收到该双模终端的无条件呼叫转移 设置消息后, 保存该双模终端在 cdma2000 lx网络的用户号码以及所述 VoIP号码的对应关系。
步骤 A1包括:
A12K 处于 cdma2000 lx网络的双模终端, 在 cdma2000 lx网络向 HRPD 网络切换过程中, 向 MSC发送无条件呼叫转移的设置消息, 其 中包括呼叫转移对应的 VoIP号码;
A122、 MSC接收到该用户的无条件呼叫转移设置消息后, 保存该 双模终端在 cdma2000 lx网络的用户号码以及呼叫转移对应的 VoIP号 码。
将 HRPD网络中的 AN和 cdma2000 lx网络中的 MSC相连接, 步 骤 B中所述获取被叫终端对应的 VoIP地址的步骤包括:
B 1、 MSC通过 HRPD AN向双模终端发送寻呼消息, 该双模终端收 到该寻呼消息后, 通过 HRPD AN向 MSC回寻呼响应;
B2、 MSC收到寻呼响应后, 向该双模终端下发主叫号码;
B3、 该双模终端收到主叫号码后, 显示主叫号码, 并判断用户是否 输入呼叫转移指令及 VoIP号码, 如果是, 将用户输入的呼叫转移指令 及 VoIP号码发送至 MSC; B4、 MSC从 HLR中保存的 VoIP号码和 VoIP地址的对应关系, 获 取该 VoIP号码对应的 VoIP地址。
在 HRPD网络中进行 IP语音业务的过程中, 如果 HRPD网络中已 激活 VoIP/可视电话 VT/即按即讲 PTT时延敏感型业务, 则被叫终端返 回被叫忙, 拒绝该呼叫; 否则, 被叫终端振铃, 完成 VoIP呼叫。
当双模终端从 HRPD网络切换回 cdma2000 lx网络后,其特征在于, 所述在 cdma2000 lx网络中的 MSC VLR进行位置登记是由默模终端主 动发起的。
本发明提供的一种将呼叫转移为因特网协议 IP语音业务的系统是 这样实现的:
一种将呼叫转移为因特网协议 IP 语音业务的系统, 应用于包含 cdma2000 lx和高速分组数据业务 HRPD的双模网络中, cdma2000 lx 网络中的 MSC通过 VoIP网关与 HRPD网络相连,
MSC VLR, 用于保存用户终端当前的位置信息, 在收到含有被叫号 码的呼叫请求后, 根据自身保存的位置信息确定被叫终端是否处于 HRPD 网络, 如果处于, 则根据被叫终端设置的 VoIP号码获取对应的 VoIP地址, 并根据该 VoIP地址将该呼叫路由到对应的 VoIP网关;
VoIP网关, 用于将 cdma2000 lx的话音呼叫转换为分组域的 VoIP 呼叫, 并将转换后的分组域的 VoIP呼叫发送给 HRPD网络, 由 HRPD 网络将该呼叫发送给被叫终端, 实现 IP语音业务。
当该被叫终端从 cdma2000 lx向 HRPD网络切换的过程中, 且在离 开 cdma2000 lx网络前,发送无条件呼叫转移的设置消息至 MSC, 其中 含有需要转移的 VoIP号码,则 MSC进一步用于保存该用户在 cdma2000 lx网络的用户号码和该 VoIP号码的对应关系。
所述 HRPD网络中的 AN与 cdma2000 lx网络中的 MSC相连接, HRPD 中的 AN, 进一步用于在收到空闲态的双模终端发送的含有 需要转移的 VoIP号码的无条件呼叫转移的登记消息, 向 MSC发送无条 件呼叫转移设置消息;
MSC, 进一步用于在接收到该双模终端的无条件呼叫转移设置消息 后,保存该双模终端在 cdma2000 lx网络的用户号码以及所述 VoIP号码 的对应关系。
本发明通过在 HRPD网络支持数据和语音并发,通过将 cdma2000 lx 话音呼叫转换成 HRPD网的 VoIP呼叫,使得默模终端用户驻留在 HRPD 网络时, 不必切换到 cdma2000 lx网络收听寻呼, 但仍然可以接听到来 自 cdma2000 lx网络的电话, 从而保证在 HRPD网中正在进行的业务不 会中断的同时, 大大提高 HRPD网开展实时性数据业务的能力。 该方法 可以终端的耗电将大大降^ (氐, 并且由于不必定期切换到 cdma2000 lx网 络, 在没有 cdma2000 lx话音呼叫时, HRPD网络中正在进行的数据业 务也不会被打断, 业务的服务质量(QoS )也会大大提高。 附图简要说明
图 1为现有技术中 cdma2000 lx/HRPD双网融合的网络架构示意图; 图 2为改进后的 cdma2000 lx/HRPD双网融合的网络框架示意图; 图 3为实现本发明方法的具体实施例一流程示意图;
图 4为实现本发明方法的具体实施例二流程示意图;.
图 5为实现本发明方法的具体实施例三流程示意图。
实施本发明的方式
为使本发明的目的、 技术方案和优点更加清楚, 下面结合附图对本 发明作进一步的详细描述。
本发明的核心内容是:双模终端在 cdma2000 lx网络中的 MSC/VLR 进行位置登记; MSC 收到含有被叫用户号码的呼叫请求后, 根据 MSC VLR中的记录判断被叫终端是否处于 HRPD网络, 如果是, MSC 获取被叫终端需要转移的 VoIP地址, 并根据该 VoIP地址寻址到对应的 VoIP网关 (GW ), 实现 IP语音业务, 如果不是, 执行正常业务流程。
这里, 为了使 MSC获取到被叫终端对应的 VoIP地址,将 cdma2000 lx呼叫转换为 VoIP呼叫,双模终端可以直接在 MSC中预先设置自身对 应的 VoIP号码, 称为 "无条件呼叫转移", 也可以在呼叫中由被叫用户. 根据主叫号码动态设定, 称为 "有条件呼叫转移"。
并且,为了实现本发明,还需要在 HLR中预先保存 VoIP号码与 VoIP 地址的对应关系。 因此, 无论是 "无条件呼叫转移" 还是 "有条件呼叫 转移", MSC都需要根据被叫用户终端需要转移的 VoIP号码从 HLR中 获取 VoIP地址,进而可以寻址到 VoIP网关, VoIP网关再将 cdma2000 lx 的话音呼叫转换为分组域的 VoIP呼叫, 实现 IP语音业务。
如图 1所示,本发明的系统包括 cdma2000 lx和 HRPD , cdma2000 lx 网络中的 MSC通过 VoIP网关与 HRPD网络中的 PDSN ( Packet Data Serving Node, 分组数据服务节点)相连。 其中, MSC/VLR, 用于保存 用户终端当前的位置信息, 在收到含有被叫号码的呼叫请求后, 根据自 身保存的位置信息确定被叫终端是否处于 HRPD网络, 如果处于, 则根 据被叫终端设置的 VoIP号码获取对应的 VoIP地址,并根据该 VoIP地址 将该呼叫路由到对应的 VoIP网关; VoIP网关, 用于将 cdma2000 lx的 话音呼叫转换为分组域的 VoIP呼叫, 并将转换后的分组域的 VoIP呼叫 发送给 PDSN, 由 PDSN将该呼叫发送给被叫终端, 实现 IP语音业务。 并且, 当该被叫终端从 cdma2000 lx向 HRPD网络切换的过程中, 且在 离开 cdma2000 lx网络前, 发送无条件呼叫转移的设置消息至 MSC, 其 中含有需要转移的 VoIP 号码, 则 MSC 进一歩用于保存该用户在 cdma2000 lx网络的用户号码和该 VoIP号码的对应关系。
如图 2所示,本发明还可以将所述 HRPD网络中的 AN与 cdma2000 lx网络中的 MSC相连接。 这样, HRPD中的 AN, 进一步用于在收到 空闲态的双模终端发送的含有需要转移的 VoIP号码的无条件呼叫转移 的登记消息, 向 MSC发送无条件呼叫转移设置消息; MSC在接收到该 双模终端的无条件呼叫转移设置消息后, 保存该双模终端在 cdma2000 lx网络的用户号码以及所述 VoIP号码的对应关系。
在本发明中, 无条件呼叫转移设置的过程可以包括两种, 一种是在 图 2所示改进后的网络架构中,将 cdma2000 lx网络中的 MSC和 HRPD 网中的 AN/PCF的连接, 如图 2所示, 这种组网方式由处于 HRPD网络 的空闲态的双模终端通过 HRPD AN在 MSC设置自身对应的 VoIP号码。
一种情况是如图 1所示的现有网络架构中, 处于 cdma2000 lx网络 的双模终端在 cdma2000 lx网络到 HRPD网的切换过程中, 在 MSC中 设置自身对应的 VoIP号码。
下面主要以图 2所示的网络构架说明实现本发明的方法。
参见图 2所示,本实施例是将 cdma2000 lx网络中的 MSC与 HRPD 网络中的 AN/PCF之间增加接口 ,以实现在 HRPD网络中转发 cdma2000 lx的寻呼消息。 在用户设置了无条件呼叫转移为 VoIP呼叫后, 当用户 切换到 cdma2000 lx网络时, VoIP呼叫是在 cdma2000 lx的分组域上发 起。
参见图 3所示, 基于图 2所示的网络框架, 利用无条件呼叫转移实 现本发明方法的过程如下:
步骤 301 : 处于 HRPD网络的空闲态的双模终端, 向 HRPD AN发 送无条件呼叫转移的登记消息, 其中携带为自身对应的 VoIP号码。 步骤 302: HRPD AN收到无条件呼叫转移的登记消息后, 向 MSC 发送无条件呼叫转移设置消息, MSC接收到该汉模终端的无条件呼叫转 移设置消息后, 保存该双模终端的 VoIP号码, 此时表明用户已激活了 呼叫转移功能。
步骤 303: 当 MSC收到呼叫请求后, MSC判断自身是否保存了被 叫用户的 VoIP 号码, 如果是, 则确定该用户激活了呼叫转移功能, 并 获取该被叫用户对应的 VoIP号码, 执行步骤 304, 否则, 跳出本流程。
步骤 304: MSC根据被叫用户对应的 VoIP号码从 HLR中获取被叫 用户对应的 VoIP地址, 然后根据该 VoIP地址寻址到相应的 VoIP网关, VoIP网关将 cdma2000 lx的话音呼叫转换为分组 的 VoIP呼叫, 实现 IP语音业务。 如果被叫终端当前已经存在 HRPD网络的激活的 VoIP/可 视电话( VT ) /即按即讲 ( PTT )等时延敏感型业务, 则被叫终端向 cdma lx返回被叫忙信息, 拒绝该呼叫; 否则, 被叫终端振铃, 完成 VoIP呼 叫。
这里, MSC根据 VoIP号码得到对应的 VoIP地址, 这与现有技术中 cdma2000 1 x网络中的寻址过程相同。
参见图 4所示, 基于图 2所示的网络框架, 利用有条件呼叫转移实 现本发明方法的具体过程如下:
步骤 401: MSC通过 HRPD AN向被叫终端发送寻呼消息。
步骤 402: 被叫终端收到该寻呼消息后, 通过 HRPD AN向 MSC回 寻呼响应。
步骤 403: MSC收到寻呼响应后, 通过 HRPD AN向被叫终端下发 主叫号码。
步骤 404: 被叫终端收到该主叫号码后, 显示主叫号码, 并判断用 户是否输入呼叫转移指令及 VoIP号码, 如果是, 将该用户输入呼叫转 移指令及 VoIP号码发送至 MSC, 然后执行步骤 405 , 否则, 跳出本流 程。
步骤 405: MSC根据用户设定的 VoIP号码, 从 HLR中获取对应的 VoIP地址, 然后根据 VoIP地址寻址到相应的 VoIP网关, VoIP网关将 cdma2000 lx的话音呼叫转换为分组域的 VoIP呼叫,进而在 HRPD网络 中进行 IP语音业务。 如果被叫终端当前已经存在 HRPD网络的激活的 VoIP/VT/PTT等时延敏感型业务, 则被叫终端向 cdma2000 lx返回拒绝 该呼叫的信息; 否则, 被叫终端振铃, 完成 VoIP呼叫。
当然, 在用户设置呼叫转移时, 用户也可以输入其它号码作为呼叫 转移的目标号码。 如果呼叫转移的目的号码是普通号码, 则在 MSC呼 叫转移后将执行的是普通呼叫流程, 而不是 VoIP流程。
并且, 当用户在 cdma2000 lx/HRPD网络发生切换时, 为保证用户 能够被寻呼到, MSC必须实时的知道用户处于哪个网络。 因此, 当用户 从 HRPD网络切换回 cdma2000 lx网络后, 或从 cdma2000 lx网络切换 回 HRPD网絡后, 可以由终端主动发起位置登记流程。
上述方法是将现有网络框架进行改动, 实现 IP语音业务。 也可以直 接在图 1所示现有的网络框架上实现本发明。
参见图 5所示, 利用现有的网络框架中, 实现本发明的具体过程如 下:
步骤 501 : 处于 cdma2000 lx网络的双模终端, 在移动到 HRPD网 络覆盖区,准备向 HRPD网络切换时,并且在离开 cdma2000 lx网络前, 向 MSC发送无条件呼叫转移的设置消息, 其中转移目的号码为本机的 VoIP号码;
步骤 502: MSC接收到该用户的无条件呼叫转移设置消息后, 保存 该用户在 cdma2000 lx网络的用户号码和该用户的 VoIP号码,表示该用 户已激活呼叫转移功能;
步骤 503:该双模终端执行切换流程,完成 cdma2000 lx网络到 HRPD 网的切换;
步骤 504: 当 MSC收到含有被叫用户号码的呼叫请求后, 根据被叫 号码判断该用户是否激活了呼叫转移功能, 然后执行步骤 505, 如果是, 否则, 跳出本流程;
步骤 505: MSC根据用户设置的转移号码从 HLR中获取对应的 VoIP 地址,然后 居 VoIP地址寻址到相应的 VoIP网关, VoIP网关将 cdma2000 lx的话音呼叫转换为分组域的 VoIP呼叫, 进而在 HRPD网络中进行 IP 语音业务。
当然, 如果被叫终端当前已经存在 HRPD 网络的激活的 VoIP/VT/PTT等时延敏感型业务, 则被叫终端向 cdma2000 lx返回被叫 忙, 拒绝该呼叫; 否则, 终端振铃, 完成 VoIP呼叫。
需要说明的是, 如果利用图 1的网络构架, 实现本发明的方法中, 当用户在 cdma2000 lx/HRPD网络发生切换时, 为保证用户能够被寻呼 到, MSC必须实时的知道双模终端用户是否处于 cdma2000 lx网络, 此 时可以考虑借用位置登记流程,当用户从 HRPD网络切换回 cdma2000 lx 网络后, 由终端主动发起一次位置登记流程。 而当用户从 cdma2000 lx 网络切换到 HRPD网络时, 由于 HRPD AN和 MSC之间没有接口, 此 时双模终端可以不做位置登记操作, 当双模终端离开 cdma2000 lx网络 后, MSC可以认为该终端已切换至 HRPD网络时, MSC可以将 cdma2000 lx网络对该双模终端的语音呼叫直接转移为 HRPD网的 VoIP呼叫。
总之, 以上所述仅为本发明的较佳实施例而已, 并非用于限定本发 明的保护范围。

Claims

权利要求书
1、 一种将呼叫转移为因特网协议 IP语音业务的方法, 应用于包含 cdma2000 1 x和高速分组数据业务 HRPD的双模网络中, 其特征在于 , 双模终端在 cdma2000 lx与 HRPD之间切换后, 在 cdma2000 lx网络中 的移动交换中心 MSC/拜访位置寄存器 VLR进行位置登记, 该方法包括. 以下步骤:
A. MSC收到含有被叫用户号码的呼叫请求后, 判断被叫终端是否 处于 HRPD网络, 如果是, 执行步骤 B;
B. MSC根据被叫终端设置的 VoIP号码获取对应的 VoIP地址, 并. 根据该 VoIP地址寻址到对应的 VoIP网关, 在 HRPD网络中进行 IP语 音业务。
2、 根据权利要求 1所述的方法, 其特征在于, 在步骤 A之前, 进 一步包括: Al、 在 MSC中保存双模终端在 cdma2000 lx网络的用户号 码以及 VoIP号码的对应关系;
步骤 B中所述被叫终端对应的 VoIP地址的步骤是:
MSC才艮据双模终端的用户号码从步骤 A1中确定对应的 VoIP号码, 再从 HLR中保存的 VoIP号码和 VoIP地址的对应关系, 获取该 VoIP号 码对应的 VoIP地址。 '
3、 根据权利要求 2所述的方法, 其特征在于, 将 HRPD网络中的 接入网 AN和 cdma2000 lx网络中的 MSC相连接, 步骤 A1包括:
A11 处于 HRPD网络的空闲态的双模终端, 向 HRPD中的 AN发 送无条件呼叫转移的登记消息, 其中携带需要转移的 VoIP号码;
A112、 HRPD AN收到该无条件呼叫转移的登记消息后, 向 MSC发 送无条件呼叫转移设置消息, MSC接收到该双模终端的无条件呼叫转移 设置消息后, 保存该双模终端在 cdma2000 lx网络的 '角户号码以及所述 VoIP号码的对应关系。
4、 根据权利要求 2所述的方法, 其特征在于, 步骤 A1包括: A121、 处于 cdma2000 1x网络的双模终端, 在 cdma2000 lx网络向
HRPD网络切换过程中, 向 MSC发送无条件呼叫转移的设置消息, 其 中包括呼叫转移对应的 VoIP号码;
. A122、 MSC接收到该用户的无条件呼叫转移设置消息后, 保存该 双模终端在 cdma2000 lx网络的用户号码以及呼叫转移对应的 VoIP号 码。
5、 根据权利要求 1所述的方法, 其特征在于, 将 HRPD网络中的 AN和 cdma2000 lx网络中的 MSC相连接,步骤 B中所述获取被叫终端 对应的 VoIP地址的步骤包括:
Bl、 MSC通过 HRPD AN向双模终端发送寻呼消息, 该双模终端收 到该寻呼消息后, 通过 HRPD AN向 MSC回寻呼响应;
B2、 MSC收到寻呼响应后, 向该双模终端下发主叫号码;
B3、 该双模终端收到主叫号码后, 显示主叫号码, 并判断用户是否 输入呼叫转移指令及 VoIP号码, 如果是, 将用户输入的呼叫转移指令 及 VoIP号码发送至 MSC;
B4、 MSC从 HLR中保存的 VoIP号码和 VoIP地址的对应关系, 获 取该 VoIP号码对应的 VoIP地址。
6、 根据权利要求 1所述的方法, 其特征在于, 在 HRPD网络中进 行 IP语音业务的过程中, 如果 HRPD网络中已激活 VoIP/可视电话 VT/ 即按即讲 PTT时延敏感型业务, 则被叫终端返回被叫忙, 拒绝该呼叫; 否则, 被叫终端振铃, 完成 VoIP呼叫。
7、 根据权利要求 1所述的方法, 当双模终端从 HRPD网络切换回 cdma2000 lx 网络后, 其特征在于, 所述在 cdma2000 lx 网络中的 MSC/VLR进行位置登记是由双模终端主动发起的。
8、 一种将呼叫转移为因特网协议 IP语音业务的系统, 应用于包含 cdma2000 lx和高速分组数据业务 HRPD的双模网络中, cdma2000 lx 网络中的 MSC通过 VoIP网关与 HRPD网络相连, 其特征在于:
MSC/VLR, 用于保存用户终端当前的位置信息, 在收到含有被叫号 码的呼叫请求后, 根据自身保存的位置信息确定被叫终端是否处于 HRPD 网络, 如果处于, 则根据被叫终端设置的 VoIP号码获取对应的 VoIP地址, 并根据该 VoIP地址将该呼叫路由到对应的 VoIP网关;
VoIP网关, 用于将 cdma2000 lx的话音呼叫转换为分组域的 VoIP 呼叫, 并将转换后的分组域的 VoIP呼叫发送 HRPD网络, 由 HRPD网 络将该呼叫发送给被叫终端, 实现 IP语音业务。
9、 根据权利要求 8 所述的系统, 其特征在于, 当该被叫终端从 cdma2000 lx向 HRPD网络切换的过程中 , 且在离开 cdma2000 lx网络 前,发送无条件呼叫转移的设置消息至 MSC,其中含有需要转移的 VoIP 号码, 则 MSC进一步用于保存该用户在 cdma2000 lx网络的用户号码 和该 VoIP号码的对应关系。
10、 根据权利要求 8所述的系统, 其特征在于, 所述 HRPD网络中 的 AN与 cdma2000 lx网络中的 MSC相连接,
HRPD 中的 AN, 进一步用于在收到空闲态的汉模终端发送的含有 需要转移的 VoIP号码的无条件呼叫转移的登记消息, 向 MSC发送含有 需要转移的 VoIP号码的无条件呼叫转移设置消息;
MSC, 进一步用于在接收到该双模终端的无条件呼叫转移设置消息 后,保存该双模终端在 cdma2000 lx网络的用户号码以及所述 VoIP号码 的对应关系。
PCT/CN2005/001036 2004-07-13 2005-07-13 Procede de traduction d'un appel a un service telephonique ip et systeme correspondant WO2006005261A1 (fr)

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