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A method for selecting code conversion device in voice-over-packet network

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CN100484293C
CN100484293C CN 200410046328 CN200410046328A CN100484293C CN 100484293 C CN100484293 C CN 100484293C CN 200410046328 CN200410046328 CN 200410046328 CN 200410046328 A CN200410046328 A CN 200410046328A CN 100484293 C CN100484293 C CN 100484293C
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method
selecting
code
network
conversion
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CN 200410046328
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Chinese (zh)
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CN1705403A (en )
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洁 王
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华为技术有限公司
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Abstract

本发明公开了一种分组语音承载网中选择编码转换设备的方法,包括步骤:软交换设备接收来自主叫用户终端的呼叫建立消息,获取所述主叫用户终端的第一语音编码;软交换设备接收来自被叫用户终端的呼叫进展类消息,获取所述被叫用户终端的第二语音编码;软交换设备比较所述第一语音编码及所述第二语音编码的带宽,根据比较结果选择编码转换设备。 The present invention discloses a packet voice network bearer selection of the coding method conversion device, comprising the steps of: receiving a softswitch call from the calling user terminal is established message, the calling user terminal, obtaining a first speech coding; Softswitch equipment receives a call progress message from the class of the called user terminal, the user of the called terminal, a second speech encoder; softswitch comparing the first and the second speech encoding speech encoding bandwidth, according to the comparison result transcoding device.

Description

一种分组语音承栽网中选择编码转换设备的方法 A packet voice network supporting plant selected encoding method conversion device

技术领域 FIELD

本发明涉及通信技术,特别是涉及一种分组语音承栽网中选择编码转换设备的方法。 The present invention relates to communication technology, particularly to a packet voice network supporting planting device selected transcoding method.

背景技术 Background technique

目前,下一代网络(NGN, Next Generation Network)日益受到运营商的关注,其优势主要在于:使网络建设变得更容易,运行成本较低,为新兴通信公司带来创收才几会,帮助运营商加强与用户的关系。 Currently, Next Generation Network (NGN, Next Generation Network) operators of growing concern, and its main advantage: the network construction easier, lower operating costs, only a few will bring revenue for emerging communications companies, helping operators to step up relations with the user. NGN并不局限于固定网络, 还可以包括移动网络等。 NGN not restricted to fixed networks, mobile networks may also include. 业务的分组承栽是NGN最主要的特点之一。 Packet bearing plant business is one of the most important features of NGN.

NGN可以实现宽带多媒体业务,但目前NGN电话业务仍非常重要,它是NGN启动业务。 NGN can achieve broadband multimedia services, but NGN phone business is still very important, it is the start NGN business. 现有的电话业务终端包括传统终端,如固定ISDN (Integrated Serviced Digital Network)及模拟电话、GSM手机、CDMA手机等,也包括支持多媒体业务的宽带终端,如R323终端、SIP ( Session Initiation Protocol) 终端、多媒体计算机、移动宽带终端等。 Existing traditional telephone services terminal includes a terminal, such as fixed ISDN (Integrated Serviced Digital Network) and analog phones, GSM mobile phones, CDMA mobile phones, including support for broadband multimedia services terminal, such as R323 terminals, SIP (Session Initiation Protocol) terminal , multimedia computer, a mobile broadband terminals.

不同的电话业务终端支持不同的语音编解码方式。 Different phone service terminals supporting different speech codec. 由于移动网络相比于固定网络,其空中接口带宽有限,所以一般移动终端的语音编码带宽较小,如目前GSM网络使用的全速率编码FR(13K)、增强全速率编码£?11(12.21<:)和半速率编码HR(5.6K),以及第三代移动网络4吏用的可变速率语音AMR编码(4.75K〜12.2K.)。 Since the mobile network compared to a fixed network, its air interface bandwidth is limited, so the bandwidth is generally less speech coding of the mobile terminal, such as the current GSM networks use a full rate encoding FR (13K), enhanced full rate coding £? 11 (12.21 < :) coding and half-rate HR (5.6K), and a variable rate speech coding AMR (4.75K~12.2K.) the third generation mobile network 4 with officials. 固定终端中,有些仅支持传统的PCM语音,即64K的G711 编码,有些则支持压缩语音编码,包括G723.1(5,3K或6.3K)、 G728(16K)、 GJ29(8K)、 G726/G727 ( 16、 24、 32Kbps)等,这些压缩编码的带宽远小于64K的G711编码。 Fixed terminal, some traditional support only PCM voice, i.e. 64K encoding the G711, while others support compressed voice coding, comprising G723.1 (5,3K or 6.3K), G728 (16K), GJ29 (8K), G726 / G727 (16, 24, 32Kbps), these compression coding is much smaller than the bandwidth of 64K encoding G711.

支持不同语音编解码的业务终端进行语音通讯时,网络中需要具有语音编码转换设备,将一方的语音编码转换成另一方支持的语音编码,使呼叫双方的语音通讯成功进4亍。 When support different voice codecs for voice communications service termination, the network needs to have the speech transcoding apparatus converts the speech encoded into one of the other supported speech coding for the call success of both voice communication into the right foot 4.

在传统网络中,语音编码转换设备的位置基本上是固定的,位于TDM(时分复用)网络边缘处。 In a traditional network, the position of the speech transcoding apparatus is substantially fixed (time division multiplexing) located at the network edge TDM. 这是由于传统TDM电路交换核心网使用64K G7U编码,所以一般将G.711之外的编码都转换成G.711编码,然后在TDM电路交换核心网中传输。 This is because the traditional TDM circuit-switched core network using 64K G7U coding, coding is generally outside the G.711 codec G.711 are converted, switched core network is then transmitted in TDM circuits. 例如:H.323分组终端与PSTN终端进行语音呼叫时,分组网络与PSTN网络之间的网关设备将H.323终端的压缩语音编码转换成G.711编码。 For example: When H.323 packet is the terminal for a voice call with the PSTN terminal, a gateway device between a packet network and the PSTN to convert compressed speech coding G.711 codec to H.323 terminals.

在NGN中,编码转换设备和主叫用户终端或被叫用户终端之间的语音流承栽为分组承栽,分组承栽包括ATM和IP两种方式,可承栽各种编码的语音, 而不仅仅是GJll编码。 In the NGN, the voice stream between code conversion plant supporting device and the calling user or the called user terminal is a terminal group bearing plant, comprising a plant bearing packets ATM and IP in two ways, bearing plant variety may be encoded voice, and just GJll coding. 若两个终端有共同支持的语音编码,那么网络中就不需要编码转换设备;若两个终端支持的语音编码不同时,则网络中需要提供编 If there are two common terminals supporting voice encoding, then the network does not need to code conversion apparatus; If both terminals support voice coding is not the same, then the network is required to provide programmed

码转换设备。 Code-switching equipment.

如果网络中有多个编码转换设备,由于不同语音编码的带宽有所不同,对某个呼叫所选择的编码转换设备的位置将大大影响网络传输的带宽。 If the network has a plurality of encoding conversion device, due to the different bandwidths of different speech coding, encoding the position of a call conversion device selected will greatly affect the bandwidth of the network. 例如: H.323终端与SIP终端进行语音通讯时,由于H.323终端支持的G.723语音编码远远小于SIP终端的G711编码,若选择靠近H.323终端一侧的编码转换设备放在,相比于选择靠近SIP终端一侧的,对分組网络带宽的需求要高很多。 For example: H.323, SIP terminal and the terminal for voice communications, since the H.323 terminals support the G.723 encoding G711 voice coding is much smaller than SIP terminal, when selecting an encoding conversion apparatus on the side close to the H.323 terminal compared to select a SIP terminal near side, the demand for bandwidth of the packet network is much higher.

现有技术中,对NGN网络中编码转换设备的位置选择,没有统一规范。 In the prior art, the position selection NGN network transcoding apparatus, not standardized. 请参阅图1, 一种现有技术是选择靠近主叫用户终端的编码转换设备。 Please refer to FIG. 1, a prior art code conversion apparatus is to select and close the calling user terminal. 其具体流程包括:主叫软交换设备(SS, SoftSwitch)接收主叫用户终端发起的呼叫建立消息,所述呼叫建立消息中携带语音编码1;由于被叫用户终端支持的编码与主叫用户终端不同,被叫用户终端向被叫软交换设备发送的呼叫进展类消息中携带语音编码2;被叫软交换设备向主叫软交换设备指示使用语音编码2; 主叫软交换设备选择相应的靠近主叫用户终端的编码转换设备;在整个语音通讯过程中,编码转换设备完成对主叫用户终端和被叫用户终端之间的语音流的编解码转换功能。 The specific process includes: calling soft switch device (SS, SoftSwitch) initiated by the calling user terminal receives the call setup message, the call establishment message carries the speech coding 1; since the called user terminal supports the encoding calling user terminal different, the called user to the calling terminal carries the type of message progress called softswitch transmitted speech encoding 2; called device to the calling soft switch device softswitch used speech coding indication 2; calling soft switch device corresponding to the selected near code conversion apparatus of the calling user terminal; communication process in the entire speech, the encoding conversion apparatus for conversion to complete codec voice stream between the caller terminal and the called user terminal.

所述现有技术的缺陷是:当主叫用户终端的语音编码带宽小于被叫用户终端的语音编码带宽时,由于选择靠近主叫用户终端的语音编码转换设备,导致对分组网络带宽的需求增大。 The drawback of the prior art: when the calling user terminal voice coding is less than the bandwidth of the called user terminal, the bandwidth of speech coding, speech transcoding due to the selection device near the calling user terminal, resulting in increased demand for network bandwidth packet Big.

发明内容 SUMMARY

本发明解决的技术问题在于提供一种分组语音承栽网中选择编码转换设备的方法,在分组语音承栽网中可以合理选择编码转换设备。 The present invention solves the technical problem is to provide a packet voice network supporting planting device selected transcoding method, a reasonable choice transcoding device supporting packet voice network planted. 为此,本发明解决技术问题的技术方案是:提供一种分组语音承载网中选 To this end, the present invention is to solve the technical solution Problem: to provide a selected voice packet bearer network

择编码转换设备的方法,包括步骤: Optional method for encoding conversion device, comprising the steps of:

1) 软交换设备接收来自主叫用户终端的呼叫建立消息,获取所述主叫用 1) the soft switch device receives a call from the calling user terminal is established message, the calling by obtaining

户终端的第一语音编码; A first speech encoder of the subscriber terminal;

2) 软交换设备接收来自被叫用户终端的呼叫进展类消息,获取所述被叫用户终端的第二语音编码; 2) Call Progress softswitch receives the message from the class of the called user terminal, obtaining the second speech encoding the called user terminal;

3) 软交换设备比较所述第一语音编码及所述第二语音编码的带宽,根据比较结果选择高带宽的用户终端一侧的编码转换设备。 3) comparing the soft switch device of the first speech encoder and the second speech encoding bandwidth, a user terminal selecting an encoding conversion apparatus according to the high bandwidth side of the comparison result.

其中,所述步骤l)中,呼叫建立消息携带第一语音编码类型信息;所述步骤2)中,呼叫进展类消息携带第二语音编码类型信息。 Wherein said step l), the call setup message carries a first speech coding type information; step 2), the call progress message carries a second class of speech coding type information.

其中,所述步骤l)中,软交换设备根据主叫用户终端的类型获取第一语音编码类型信息;所述步骤2)中,软交换设备根据被叫用户终端的类型获取第二语音编码类型信息。 Wherein said step l), the soft switch device acquires a first type of speech coding type information according to the calling user terminal; step 2) the soft switch device acquires a second speech coding type according to the type of the called user terminal, information.

其中,所述软交换设备包括连接主叫用户终端的主叫软交换设备以及连接被叫用户终端的被叫软交换设备。 Wherein said soft switch device comprises connecting the calling user terminal and the calling softswitch called user terminal connected to the called softswitch.

其中,所述步骤3)具体包括: Wherein said step 3) comprises:

311 )被叫软交换设备识别主叫用户终端和被叫用户终端支持的语音编码是否不同;如果相同,则不选择编码转换设备;如果不同,则进入步骤312); 311) called softswitch identify the calling user terminal and the called user terminal support are different speech coding; if the same transcoder equipment is not selected; if different, the process proceeds to step 312);

312)比较不同语音编码的带宽;若第一语音编码的带宽小于第二语音编码的带宽,则执行步骤313);若第二语音编码的带宽小于第一语音编码的带宽,则执行步骤314和315); 312) Comparison of different speech coding bandwidth; if the first bandwidth is less than the second speech encoding speech encoding bandwidth, execute step 313); if the second bandwidth is less than a first speech encoding speech encoding bandwidth, then step 314 is executed and 315);

313 )被叫软交换设备判断是否有满足第一和第二语音编码转换需求的编码转换设备,如果没有,则转到步骤314);如果有,则选择前述编码转换设备; 313) determines whether the called softswitch satisfying the first and second speech transcoding transcoding equipment needs, if not, go to step 314); if so, selecting the code conversion apparatus;

314)被叫软交换设备向主叫软交换设备返回呼叫进展类消息,携带被叫用户终端支持的第二语音编码;315 )主叫软交换设备选择满足第一和第二语音编码转换需求的编码转换设备。 314) called soft switch device returns to the calling softswitch based call progress message carries the called user terminal supported by a second speech encoder; 315) satisfying a calling soft switch device the first and second speech transcoding needs transcoding device.

其中,当步骤315)中主叫软交换设备没有合适的编码转换设备,则进行316)主叫软交换设备向被叫软交换设备返回呼叫进展类消息,携带第一语音编码; Wherein, when step 315) the calling softswitch no suitable transcoding device 316 is performed) calling softswitch class returns a call progress message to the called softswitch carries a first speech coding;

317 )被叫软交换设备判断是否有满足第一和第二语音编码转换需求的编码转换设备,如果没有,则呼叫失败;如果有,则选择前述编码转换设备。 317) determines whether the called softswitch satisfying the first and second transcoding equipment for voice transcoding needs, if not, the call failure; if so, selecting the code conversion apparatus. 其中,在主叫软交换设备和被叫软交换设备之间经过汇接软交换设备。 Wherein, between the calling and the called soft switch device Softswitch via tandem softswitch. 其中,所述主叫用户终端和被叫用户终端属于同一软交换设备。 Wherein the calling user terminal and the called terminal belong to the same user softswitch. 其中,在步骤3)之后还包括步骤: Wherein, after step 3) further comprises the step of:

4) 软交换设备发送呼叫进展类消息,携带所述编码转换设备的信息; 4) softswitch sends a call progress message class, the message carries the code conversion apparatus;

5) 用户终端根据接收到的编码转换设备的信息,分别与该编码转换设备建立通讯。 5) The user terminal based on the information received code conversion device, respectively, establish communication with the transcoding apparatus.

相对于现有技术,本发明的有益效果是:由于本发明的软交换设备获取主叫用户终端和被叫用户终端的语音编码,对其带宽并进行比较,然后根据比较结果合理选择编码转换设备,与现有技术单纯采用靠近主叫用户终端一侧的编码转换设备相比,当主叫用户终端的语音编码带宽小于被叫用户终端的语音编码带宽时,可以使语音流数据在分组承栽网络中的带宽需求得到节省。 With respect to the prior art, the beneficial effects of the present invention are: the present invention due to the softswitch acquiring speech encoding the calling user terminal and the called user terminal, and comparing their bandwidths, and then a reasonable choice transcoding apparatus according to the comparison result , the prior art apparatus only using a user terminal near the transcoder compared calling side, when the voice coding is less than the bandwidth of the calling user terminal speech coding bandwidth of the called user terminal, allows voice stream data packet bearing plant network bandwidth requirements resulting savings. 附困说明 Description attached trapped

图1是一种现有技术的分组语音承栽网中选择选择编码转换设备的流程 FIG. 1 is a prior art voice packets bearing plant network selection procedure to select transcoding device

图; Figure;

图2是分组语音承载网的通用的网络结构示意图; 图3是本发明一个实施方式的流程图。 FIG 2 is a general schematic view of a packet voice network bearer network; FIG. 3 is a flowchart of one embodiment of the present invention. 具体实施方式 detailed description

在分组语音承栽网中,当主叫用户终端和被叫用户终端支持的语音编码不同时,需要在网络中提供编码转换设备。 Bearing plant in packet voice network, the user terminal when the calling terminal and the called user does not support simultaneous voice coding, the need to provide transcoding device in the network. 网络中通常具有多个编码转换设备, 并位于不同位置,受不同软交换设备的控制。 Networks typically have a plurality of code conversion control apparatus, and located at different locations, by different softswitch. 本发明提出一种在分组语音承栽网中合理选择编码转换设备的方法,从而节省语音在分组承栽网中的带宽需求。 The present invention provides a rational method of selecting the encoding conversion apparatus in a packet voice network bearing plant, thereby saving bandwidth requirements in a packet voice network supporting the plant.

请参阅图2,是分组语音承栽网通用的网络结构。 Refer to Figure 2, a packet voice network architecture bearing planted with Netcom. 包括主叫软交换设备、 被叫软交换设备和多个编码转换设备。 Including calling softswitch, the called softswitch device and a plurality of transcoding. 通过软交换设备比较主叫用户终端和被叫用户终端支持的语音编码的带宽的大小,选择靠近髙带宽的用户终端一侧的编码转换设备,主叫用户终端和被叫用户终端分别与该编码转换设备进行通讯,软交换设备控制该编码转换设备在通讯过程中完成语音编码转换功能。 By comparing the size of the softswitch calling user terminal and the called user terminal supports voice encoding bandwidth, a user terminal selecting an encoding conversion apparatus side near Gao bandwidth, the calling user terminal and the called user terminal are encoded converting the communication device, the control device softswitch transcoding speech transcoding apparatus completed in the communication process. 请参阅图3,是本发明数据传输方法的一个实施例的流程图。 See FIG. 3 is a flowchart of one embodiment of the data transmission method of the present invention. 主叫用户终端发起呼叫建立消息,携带自身支持的语音编码1。 The calling user terminal initiates a call setup message, carrying their support voice coding 1. 主叫软交换设备向被叫软交换设备发起呼叫建立消息,携带主叫用户终端支持的语音编码1。 Calling soft switch device initiates a call to the called softswitch establishment message carries the calling user terminal supported by a speech encoding.

被叫软交换设备向被叫用户终端发起呼叫建立消息,携带主叫用户终端支持的语音编码1。 Called soft switching device initiates a call setup message to the called user terminal, the user carries the calling terminal supports 1 voice encoding.

被叫用户终端向被叫軟交换设备发送呼叫*类消息,返回自身支持的语音编码2。 * The called user terminal sends a call message to the called soft switch type device, supported by the return speech encoding 2.

被叫软交换设备识别主叫用户终端和被叫用户终端支持的语音编码是否不同;如果相同,则不选择编码转换设备;如果不同,则比较不同语音编码的带宽。 Called softswitch identify the calling user terminal and the called user terminal support are different speech coding; if the same equipment is not selected transcoder; If not, the comparison of different speech encoding bandwidth. 若语音编码1的带宽小于语音编码2的带宽,则执行子流程P1;若语音编码2的带宽小于语音编码1的带宽,则执行子流程P2。 If the bandwidth of a speech coding is smaller than the bandwidth of the speech encoder 2, subprocess P1 is executed; if the bandwidth of the speech encoder 2 is smaller than the bandwidth of the speech coding 1, the subprocess P2 is executed.

其中,子流程P1包括: Wherein subprocess P1 includes:

被叫软交换设备判断是否有满足语音编码1和2转换需求的合适的编码转换设备(被叫软交换设备一般可以根据资源的配置情况和使用情况进行判断), 如果没有,则转到子流程P2;如杲有,则继续执行子流程P1的后续步骤。 Determining whether the called softswitch satisfying the appropriate coding and speech coding apparatus 2 converts the conversion needs (typically called soft-switching device may be determined according to the configuration and use of resources), if no, go to the sub-Scheme 1 P2; as Gao has, proceed to the subsequent steps subprocess P1.

被叫软交换设备向主叫软交换设备返回呼叫悉艮类消息,携带语音编码1 和编码转换设备的地址;主叫软交换设备向主叫用户终端返回呼叫进展类消 Called softswitch return call to the calling class Gen noted softswitch carry the address transcoding and speech encoding apparatus 1; calling softswitch return call to the calling user the progress decolorizer terminal

息,携带语音编码1和编码转换设备的地址。 Interest, and carries an address transcoding speech encoding apparatus. 被叫软交换设备向被叫用户终端 Soft switching device called terminal to the called user

返回呼叫进展类消息,携带语音编码2和编码转换设备的地址。 Return call progress message type, carry the address transcoding and speech coding apparatus 2. 被叫软交换设备选择编码转换设备后,在后续通讯过程中控制该编码转换设备(即软交换设备与编码转换设备进行交互,如下发各种命令、要求编码转 After selecting the called softswitch code conversion apparatus controls the transcoding device in the subsequent communication process (i.e. encoding the softswitch conversion device interacts send various commands as required encoding transposase

换设备上报一些数据等);用户终端(包括主叫用户终端和被叫用户终端)根据收到的编码转换设备的地址,分别与该编码转换设备建立语音通讯,实现数据的传输。 In other equipment to report some of the data, etc.); a user terminal (including the calling user terminal and the called user terminal) the address of the transcoding device receives, voice communications are established with the transcoding apparatus, to achieve data transmission.

子流程P2包括: Subprocess P2 comprising:

被叫软交换设备向主叫软交换设备返回呼叫进展类消息,携带被叫用户终端支持的语音编码2。 Called softswitch class returns a call progress message to the calling softswitch carries the called user terminal supports voice coding 2.

主叫软交换设备选择是否有满足语音编码1和2转换需求的合适的编码转换设备,如果没有,则进行异常处理的子流程P3;如果有,则继续执行子流程P2的后续步骤。 To choose whether the calling softswitch 1 and satisfying a speech encoding apparatus 2 suitable transcoding conversion needs, if not, the exception handling sub-flow P3; if yes, proceed to subsequent steps subprocess P2.

主叫软交换设备向被叫软交换设备返回呼叫进展类消息,携带语音编码2 和编码转换设备的地址;主叫软交换设备向主叫用户终端返回呼叫进展类消息,携带语音编码1和编码转换设备的地址。 Calling softswitch class returns a call progress message to the called softswitch and 2 carry the address transcoding speech encoding apparatus; calling softswitch class returns a call progress message to the calling user terminal, and to carry encoded speech coding 1 conversion address of the device. 被叫软交换设备向被叫用户终端返回呼叫*类消息,携带语音编码2和编码转换设备的地址。 Called terminal returns to the calling softswitch * based message to the called user, carry the address transcoding and speech coding apparatus 2.

主叫软交换设备选择编码转换设备后,在后续通讯过程中控制该编码转换设备;用户终端(包括主叫用户终端和被叫用户终端)根据收到的编码转换设备的地址,分别与该编码转换设备建立语音通讯,实现数据的传输。 Calling softswitch select code conversion apparatus controls the transcoding device in the subsequent communication process; user terminals (including the calling user terminal and the called user terminal) address code conversion device according to the received, encoded with the respective conversion devices establish voice communication, to achieve data transmission.

子流程P3包括: Subprocess P3 comprising:

主叫软交换设备向被叫软交换设备返回呼叫进展类消息,携带语音编码 Calling softswitch class returns a call progress message to the called softswitch carry voice coding

1; 1;

被叫软交换设备判断是否有满足语音编码1和2转换需求的合适的编码转换设备,如果没有,则呼叫失败;如果有,则继续执行后续步骤。 Called softswitch determines whether there is a speech encoder and suitable to meet transcoding requirements conversion apparatus 2, and if not, the call fails; if yes, proceed to subsequent steps.

被叫软交换设备向主叫软交换设备返回呼叫进展类消息,携带语音编码1 和编码转换设备的地址;被叫软交换设备向被叫用户终端返回呼叫进展类消息,携带语音编码2和编码转换设备的地址。 Called softswitch class returns a call progress message to the calling softswitch carry the address transcoding and speech encoding apparatus 1; callee softswitch class returns call progress message to the called user terminal, and to carry encoded speech encoding 2 conversion address of the device. 主叫软交换设备向主叫用户终端返回呼叫进展类消息,携带语音编码1 和编码转换设备的地址。 Calling softswitch terminal returns a call progress message to the calling user classes, and carrying an encoded speech encoding the address conversion device.

被叫软交换设备选择编码转换设备后,在后续通讯过程中控制该编码转换 After selecting the called softswitch code conversion apparatus controls the encoding conversion in the subsequent communication process

设备;用户终端(包括主叫用户终端和被叫用户终端)根据收到的编码转换设备的地址,分别与该编码转换设备建立语音通讯,实现数据的传输。 Equipment; user terminals (including the calling user terminal and the called user terminal) the address of the transcoding device receives, voice communications are established with the transcoding apparatus, to achieve data transmission.

可以理解的是,本发明中,呼叫进展类消息不特指某一个或几个呼叫消息, 而是语音承载连接建立之前的呼叫消息的统称。 It will be appreciated that the present invention, a call progress message is not specific to one type or several call message, but the message is a voice call bearer collectively before the connection is established.

所述图3所示的实施方式中,表示的是主叫用户和被叫用户位于两个软交换设备,并且两个软交换设备直接通讯的情况。 The embodiment shown in FIG. 3, shows the case the calling user and the called user is located in two soft switching devices, and two softswitch direct communication. 但是本发明并不局限于该实施方式。 However, the present invention is not limited to this embodiment.

本发明的另一实施方式中,主叫用户终端和被叫用户终端位于同一个软交换设备。 Another embodiment of the present invention, the calling user terminal and the called user terminal in the same softswitch. 如果软交换设备控制下没有或只有一个编码转换设备,那么不存在选择问题。 If no or only a transcoding device softswitch equipment control, then there is no choice. 如果软交换设备控制下有多个编码转换设备,就需要选择一个编码转换设备。 If multiple transcoding softswitch device control apparatus, it is necessary to select a transcoding apparatus.

首先,软交换设备分别获取主叫用户终端和被叫用户终端的语音编码类 First, soft switch device respectively acquire the speech coding classes calling user terminal and the called user terminal

型; type;

软交换设备对语音编码的带宽进行比较,并根据比较结果选择编码转换设备。 Softswitch encoded speech bandwidth comparing and selecting transcoding apparatus according to the comparison result.

若软交换设备可利用一定信息进行判断,如主叫用户/被叫用户/编码转换设备的域名/号码等地址信息,则选择最靠近高带宽语音编码的用户终端的编码转换设备,并对该编码转换设备进行控制;若不能通过一定方式选择最靠近高带宽语音编码的用户终端的编码转换设备,则任意选择一个编码转换设备; 用户终端分别与该编码转换设备建立语音通讯,实现数据的传输。 If the softswitch can be determined address information, such as caller / called user / domain transcoding device / number such as the use of certain information, select transcoding high-bandwidth speech coding apparatus closest to the user's terminal, and the transcoding device control; if not by a way selecting transcoding high-bandwidth speech coding apparatus closest to the user terminal, the arbitrarily selected a transcoder device; user terminal are established voice communications with the transcoding apparatus, data transmission .

本发明的又一实施方式中,主叫用户和被叫用户位于两个软交换设备,呼叫控制信令中间经过若干个汇接软交换设备。 A further embodiment of the present invention, the calling user and the called user is located two softswitch call control signaling via a plurality of intermediate tandem softswitch. 若主叫软交换设备或被叫软交换设备有合适编码转换设备供选择,则汇接软交换设备只对呼叫控制信令做透明传送。 If the calling or the called soft switch device Softswitch conversion apparatus for encoding a suitable choice, the tandem softswitch only do transparent transmission of call control signaling. 若主叫软交换设备或被叫软交换设备没有合适编码转换设备供选择,则当汇接软交换设备识别到主叫用户终端和被叫用户终端支持不同语音编码时, If the calling or the called softswitch softswitch does not choose a suitable code conversion apparatus, when the tandem softswitch identifies the calling user terminal and the called user terminal supports different voice coding,

需要判断语音编码的带宽大小,即完成被叫软交换设备类似功能,根据需要选择编码转换设备并进行控制。 Speech coding need to determine the size of the bandwidth, i.e. to complete a called softswitch similar functions, and the need to select the encoding conversion device is controlled according to.

需要进一步说明的是,本发明中,软交换设备之间的局间信令,用户终端与软交换设备之间的用户信令,可以有不同选择。 It is further noted that the present invention, between interoffice signaling softswitch user signaling between the user terminal and the soft switch device, may have different options.

本发明中,软交换设备获取用户终端的语音编码的途径可以有不同选择。 In the present invention, the user terminal acquires the speech coding softswitch approach may have different options.

如有些用户终端能主动上报自身支持的语音编码;有些不能主动上报,这时需 As reported by some user terminal can actively supported by the voice coding; some are not actively reports, then the need to

类型,某些用户类型对应固定的语音编码类型),并可能在后续呼叫消息中携带该语音编码类型。 Type, some users corresponding to the type of fixed voice coding type), and may carry the speech coding type in the subsequent call messages.

可以理解,本发明可应用于固定或移动分组语音承栽网络,用户终端包括移动用户终端和/或固定用户终端,包括传统用户终端和/或宽带用户终端。 It will be appreciated, the present invention is applicable to a fixed or mobile bearing plant packet voice network, the user terminal includes a mobile user terminal and / or fixed user terminals, comprising a conventional user terminal and / or the broadband user terminal. 其中软交换设备包括固定网络的软交换设备设备、移动网络的移动交换中心服务器(MSC Server)、 SIP移动终端服务器等。 Wherein the soft switch device comprises a mobile switching center server softswitch device, a mobile network of a fixed network (MSC Server), SIP server, etc. mobile terminals.

编码转换设备不一定是独立设备,可以是属于媒体网关或媒体资源节点的一部分。 Transcoding device is not necessarily an independent device, it may be part of a media gateway or a media resource node belongs. 编码转换设备和软交换设备也可以集成在一个交换设备中。 Transcoding apparatus softswitch and may be integrated in a switching device.

此外,本发明主要应用于电话业务,但是不排除电话业务之外的多媒体业务,对多媒体业务中的语音流起作用。 Further, the present invention is mainly applied to telephone service, but does not preclude the multimedia service other than telephone services, multimedia services for voice traffic work.

以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰, 这些改进和润饰也应视为本发明的保护范围。 The above are only preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the present invention without departing from the principles of the premise, further improvements and modifications may be made, these improvements and modifications should also be the protection scope of the present invention.

Claims (9)

1、一种分组语音承载网中选择编码转换设备的方法,其特征在于,包括步骤:1)软交换设备接收来自主叫用户终端的呼叫建立消息,获取所述主叫用户终端的第一语音编码;2)软交换设备接收来自被叫用户终端的呼叫进展类消息,获取所述被叫用户终端的第二语音编码;3)软交换设备比较所述第一语音编码及所述第二语音编码的带宽,根据比较结果选择高带宽的用户终端一侧的编码转换设备。 1, A packet voice bearer network selection method for encoding conversion apparatus, characterized by comprising the steps of: 1) the soft switch device receives a call from the calling user terminal is established message to obtain the first voice calling user terminal coding; 2) the soft switch device receives a call progress message from the class of the called user terminal, the user of the called terminal, a second speech encoder; 3) comparing the first soft switch device and the second speech speech coding encoding bandwidth, high bandwidth selected based on the comparison transcoding device user terminal side.
2、 根据权利要求1所述的选择编码转换设备的方法,其特征在于:所述步骤l)中,呼叫建立消息携带第一语音编码类型信息;所述步骤2)中,呼叫进展类消息携带第二语音编码类型信息。 2, according to the selection method of transcoding device according to claim 1, wherein: said step l), the call setup message carries a first speech coding type information; step 2), the call progress message carries the class The second speech coding type information.
3、 根据权利要求1所述的选择编码转换设备的方法,其特征在于:所述步骤l)中,软交换设备根据主叫用户终端的类型获取第一语音编码类型信息; 所述步骤2)中,软交换设备根据被叫用户终端的类型获取第二语音编码类型信息。 3, selecting a coding method conversion device according to claim 1, wherein: said step l), the soft switch device acquires a first type of speech coding type information according to the calling user terminal; step 2) , the soft switch device acquires a second type of speech coding type information according to the called user terminal.
4、 根据权利要求1所述的选择编码转换设备的方法,其特征在于:所述软交换设备包括连接主叫用户终端的主叫软交换设备以及连接被叫用户终端的被叫软交换设备。 4. The selection of the coding method conversion apparatus according to claim 1, wherein: said soft switch device of the called soft switch device comprises a calling soft switch device connected to the calling user terminal and the called user terminal is connected.
5、 根据权利要求4所述的选择编码转换设备的方法,其特征在于:所述步骤3)具体包括:.311 )被叫软交换设备识别主叫用户终端和被叫用户终端支持的语音编码是否不同;如果相同,则不选择编码转换设备;如果不同,则进入步骤312);.312)比较不同语音编码的带宽;若第一语音编码的带宽小于第二语音编码的带宽,则执行步骤313);若第二语音编码的带宽小于第一语音编码的带宽,则执行步骤314和315);313)被叫软交换设备判断是否有满足第一和第二语音编码转换需求的编码转换设备,如果没有,则转到步骤314);如果有,则选择前述编码转换设备; 314)被叫软交换设备向主叫软交换设备返回呼叫进展类消息,携带被叫用户终端支持的第二语音编码; 315)主叫软交换设备选择满足第一和第二语音编码转换需求的编码转换设备。 5. The apparatus of claim selecting transcoding method according to claim 4, wherein: said step 3) comprises: .311) called softswitch identify the calling user terminal and the called user terminal supports voice encoding are different; if the same transcoder equipment is not selected; if different, the process proceeds to step 312) ;. 312) compare the speech coding bandwidth; if the first bandwidth is less than the second speech encoding speech encoding bandwidth, step 313); if the second bandwidth is less than a first speech encoding speech encoding bandwidth, steps 314 and 315); 313) determines whether the called softswitch encoding conversion apparatus satisfies the first and second speech transcoding needs if not, go to step 314); if so, selecting the code conversion apparatus; 314) of the called softswitch class returns a call progress message to the calling softswitch carries the called user terminal supports a second speech coding; 315) calling softswitch transcoding apparatus that satisfies the first and second speech transcoding needs.
6、 根据权利要求4所述的选择编码转换设备的方法,其特征在于:当步骤315)中主叫软交换设备没有合适的编码转换设备,则进行316)主叫软交换设备向被叫软交换设备返回呼叫进展类消息,携带第一语音编码; 317)被叫软交换设备判断是否有满足第一和第二语音编码转换需求的编码转换设备,如果没有,则呼叫失败;如果有,则选择前述编码转换设备。 6. The apparatus of claim selecting transcoding method according to claim 4, wherein: when the step 315) the calling softswitch no suitable transcoding device 316 is performed) calling soft switch device to a called soft class switching device returns call progress message carrying the first speech encoder; 317) determines whether the called softswitch encoding conversion apparatus satisfies the first and second speech transcoding needs, if not, the call failure; if so, select the encoding conversion apparatus.
7、 根据权利要求4所述的选择编码转换设备的方法,其特征在于:在主叫软交换设备和被叫软交换设备之间经过汇接软交换设备。 7. The apparatus according to claim selecting transcoding method according to claim 4, wherein: between the calling and the called soft switch device Softswitch via tandem softswitch.
8、 根据权利要求1所述的选择编码转换设备的方法,其特征在于:所述主叫用户终端和il叫用户终端属于同一软交换设备。 8. The apparatus according to claim selecting transcoding method according to claim 1, wherein: the calling user terminal and the called user terminal belonging to the same il softswitch.
9、 根据权利要求1至8任一项所述的选择编码转换设备的方法,其特征在于,在步骤3)之后还包括步骤: 4) 软交换设备发送呼叫进展类消息,携带所述编码转换设备的信息; 5) 用户终端根据接收到的编码转换设备的信息,分别与该编码转换设备建立通讯。 9, according to the selection method of encoding conversion device according to any one of claims 1 to claim 8, characterized in that, after step 3) further comprises the step of: 4) softswitch sends a call progress message type, carrying the transcoding information apparatus; 5) of the user terminal based on the information received code conversion device, respectively, establish communication with the transcoding apparatus.
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