WO2007109935A1 - Procédé pour la mise en oeuvre d'une session selon le modèle paquet-paquet, et passerelle multimédia associée - Google Patents

Procédé pour la mise en oeuvre d'une session selon le modèle paquet-paquet, et passerelle multimédia associée Download PDF

Info

Publication number
WO2007109935A1
WO2007109935A1 PCT/CN2006/003116 CN2006003116W WO2007109935A1 WO 2007109935 A1 WO2007109935 A1 WO 2007109935A1 CN 2006003116 W CN2006003116 W CN 2006003116W WO 2007109935 A1 WO2007109935 A1 WO 2007109935A1
Authority
WO
WIPO (PCT)
Prior art keywords
trfo
unit
session
codec
media gateway
Prior art date
Application number
PCT/CN2006/003116
Other languages
English (en)
French (fr)
Inventor
Dahai Wang
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 CN200680012830XA priority Critical patent/CN101160888B/zh
Publication of WO2007109935A1 publication Critical patent/WO2007109935A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/66Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the present invention relates to media bearer technology in the field of communications, and in particular to a method and media gateway for implementing a packet-packet model session.
  • the MGW 100 includes an Operation Administration Maintenance (OAM) unit 110, a narrowband unit 120, a wideband unit 130, a codec pool 140, and a control unit 150.
  • OAM Operation Administration Maintenance
  • the OAM unit 110 provides operational and maintenance functions for the entire system while providing an interface to the external operational support system.
  • the narrowband unit 120 provides interface and protocol processing functions to the narrowband side.
  • the wideband unit 130 provides an interface and protocol processing function to the broadband side.
  • Codec pool 140 provides media processing resources, such as code conversion codecs (TC, Transcoder) 0 control unit 110 to the media gateway controller (MGC, Media Gateway Controller) perpendicular to the interface, and the processing in accordance with a control command from the MGC Driving the internal narrowband unit 120, the wideband unit 130, the codec pool 140 and the like to work, such as inserting a TC between endpoints of different bearer formats, activating a TFO (Tandem Free Operation) protocol on the TC, satisfying The TrFO (Transcoder Free Operation) condition directly connects the two sides of the session to the endpoint, and so on.
  • TC code conversion codecs
  • MGC Media Gateway Controller
  • a very important function of the MGW is the bearer and media format conversion, which is done by the TC in the codec pool.
  • the TC is usually implemented as a PCM (Pulse Code Modulation) and a packet compression at the other end. It is convenient to implement the TDM-packet session model (meaning that the end bearer format in the session is based on TDM technology, and The other end is based on packet coding).
  • 2 is a schematic diagram of a TC codec in the prior art.
  • the digital speech signal DS0 is processed by the G.723 compression algorithm by the TC 200 to obtain a compressed speech frame G.723/IP.
  • the packet-packet session model (meaning that the bearer format at both ends of the session is based on packet technology) also requires a similar codec conversion. Due to the complexity of the implementation of the technology, it is difficult to directly convert the packet codec to the packet codec.
  • the TCs in the two TDM-packet models can be used to be connected to each other through the PCM side, so that any packet codec can be converted to any packet codec.
  • Two serially connected TCs are called back-to-back TCs.
  • Figure 3 is a schematic illustration of a back-to-back TC in the prior art.
  • the compressed speech frame compressed by the AMR (Adaptive Multi-Rate) algorithm is restored by the first TC 310 to the sampled signal on the intermediate DS0, and the second TC 320 presses it again.
  • the G.723 algorithm compresses into a corresponding compressed speech frame (already different from the previous AMR compressed speech frame). In the other direction, it is treated in a similar manner. However, each codec will cause some damage to the voice quality.
  • TFO is an in-band communication technology. After the call is established, the used codec is negotiated, and when the negotiation result indicates that the codec used at both ends meets the TFO compatibility condition, the codec function of both ends is bypassed, and the compressed voice frame is directly transmitted to the receiver.
  • FIG. 4 is a schematic diagram of the logical structure of the TFO model in the prior art.
  • the compression algorithms at both ends are FR-AMR and HR-AMR, respectively.
  • the first TC 411 and the second TC 421 belong to the first MGW 410 and the second MGW 420, and are connected by a TDM circuit.
  • the TDM circuit is based on PCM sampling coding. Structure.
  • the first TC 410 and the second TC 420 pass TFO information through a portion of the bits of the sampled signal on the TDM line, and TFO negotiation is performed under the control of the MGC (not shown).
  • TrFO is an out-of-band transcoding control technology that allows the network to negotiate the type and mode of codecs before a call is established. If the codec used at both ends satisfies Ti'FO compliant conditions (for example, both AMR codecs and the same configuration), the call can be converted without codec.
  • the TFO operation is performed by the codec pool.
  • the TC is completed, and the TrFO is mainly reflected in the control and coordination work. Whether it is TFO or Ti'FO operation, its control and coordination work is done in control unit 150.
  • control unit 150 also interacts with the MGC, such as activating/deactivating the TFO controlled by the MGC, and determining that the Ti'FO operating conditions are based on media codec parameters from the MGC.
  • TrFO For some media gateways, it is impossible to implement TrFO for architecture reasons. For example, the lack of an appropriate packet switching plane is one of the important technical elements of TrFO operation. For such a gateway, packet-to-packet bearer conversion can be implemented using the aforementioned back-to-back TC.
  • the TrFO protocol may only be partially implemented due to technical complexity.
  • WCDMA Wideband Code Division Multiple Access
  • AMR Access Management Entity
  • ACS Active Codec Mode Set
  • the codec mode used can be limited to one by rate control.
  • this is a call configuration that satisfies the TrFO condition, but because rate coordination is technically complex and has some impact on system performance, it may be discarded when the system is implemented, resulting in packet-grouping in this case.
  • the session model is still plugged into the TC, and the media gateway with back-to-back TC technology is plugged into the back-to-back TC.
  • the result of inserting the back-to-back TC is that the voice quality is degraded. This is because the TrFO/TFO conditional session is inserted into the back-to-back TC after each codec pair. Voice quality can cause some damage.
  • the present invention provides a method and media gateway for implementing a packet-packet model session capable of overcoming voice quality loss for situations where TrFO is not supported or limited to support TrFO capabilities.
  • the present invention provides a method of implementing a packet-packet model session, the method comprising: inserting a back-to-back TC in a case where it is determined that the TrFO is not handled for the session; activating the back-to-back TC , to make TFO negotiation; after the negotiation is passed, make the back-to-back TC work in the through mode.
  • a media gateway including: a control unit and a codec pool unit;
  • the control unit is configured to: when it is determined that the session that satisfies the packet-packet model does not adopt the Ti'FO protocol, instruct the codec pool unit to insert the back-to-back TC; and instruct the codec pool unit to activate the back-to-back TC Conduct TFO negotiations;
  • the back-to-back TC is used for TFO negotiation, and works in the through mode after the TFO negotiation passes, and transparently transmits the compressed voice.
  • the back-to-back TC can still be bypassed by activating the back-to-back TC for TFO negotiation.
  • the codec function which improves voice quality.
  • FIG. 1 is a schematic diagram of a logical structure of an MGW in the prior art
  • FIG. 2 is a schematic diagram of a TC codec in the prior art
  • Figure 3 is a schematic view of a back-to-back TC in the prior art
  • FIG. 4 is a schematic diagram showing the logical structure of a TFO model in the prior art
  • FIG. 5 is a schematic diagram showing the logical structure of a back-to-back model according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for implementing a packet-packet model session according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a media gateway according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram of a control unit and a codec pool in a media gateway according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of transparent transmission of compressed speech in accordance with an embodiment of the present invention.
  • Figure 5 is a schematic diagram showing the logical structure of a back-to-back model of an embodiment of the present invention.
  • the compression algorithms at both ends are FR-AMR and HR-AMR.
  • the first TC 510 and the second TC 520 belong to the same MGW, and are connected in the middle through a time division switching bus inside the MGW, and the time division switching bus is based on the principle of sampling signals of the PCM.
  • the back-to-back TC is essentially two separate TCs 510 and 520 connected by a TDM channel that can perform TFO operations on the TDM channel.
  • the TFO operation is not enabled and disabled under the control of the MGC, but requires the MGW to perform activation and deactivation processes on its own. Because this back-to-back TC connection is grouped into a packet topology, at the MGC corner It is a condition that does not satisfy the TFO operation.
  • the process of the embodiment of the present invention includes:
  • Step S610 the control unit checks the bearer format parameters of the session endpoint when processing the instruction from the MGC.
  • Step S620 for the session that satisfies the packet-packet model: if the MGW does not support the TrFO protocol at all, the back-to-back TC is directly inserted;
  • Step S630 if the MGW only partially implements the TrFO protocol (here, the session that partially satisfies the TrFO condition is treated as if the condition is not satisfied), then the media parameters carried on both sides are found to not satisfy the implemented TrFO. Insert the back-to-back TC when conditions are met.
  • Step S640 when the back-to-back TC is inserted, the control unit sends an instruction to the codec pool (without MGC control) to activate the TFO state machine on the two TCs bundled together, in specific implementation time. Just add the relevant parameters to the communication interface.
  • Step S650 after the TFO state machine on the two TCs back to back is activated, the TFO negotiation to the other party is started.
  • Step S660 if the negotiation is passed, the two TCs work in the through mode, that is, the codec function is bypassed, the compressed voice is transparently transmitted, and the voice loss is eliminated.
  • FIG. 7 is a structural block diagram of an MGW according to an embodiment of the present invention.
  • the MGW of the embodiment of the present invention includes a control unit 710 and a codec pool unit 720.
  • the codec pool unit 720 provides a back-to-back TC, and the back-to-back TC includes a first TC 731 and a second TC 732.
  • the first TC 731 and the second TC 732 are connected by a time division exchange bus inside the MGW.
  • the control unit 710 is configured to instruct the codec pool unit 720 to insert the back-to-back TC and activate the first TC 731 and the second TC 732 for TFO negotiation in the case where it is determined that the TrFO protocol processing is not performed for the session satisfying the packet-packet model.
  • the first TC 731 and the second TC 732 are used for TFO negotiation, and the compressed voice is transparently transmitted after the TFO negotiation is passed.
  • control unit 710 includes:
  • a bearer format parameter checking unit 711 configured to process a session when processing an instruction from the MGW The bearer format parameters of the endpoint are checked to determine whether the session is processed by the TrFO protocol;
  • the insertion instructing unit 712 is configured to: when the bearer format parameter checking unit 712 determines that the session is not processed by the Ti'FO protocol, instruct the codec pool unit 720 to insert the back-to-back TC; the activation indicating unit 713 is configured to insert the back-to-back TC Thereafter, the codec pool unit 720 is instructed to activate the first TC 731 and the second TC 732 for TFO negotiation.
  • the codec pool unit 720 includes:
  • the insertion unit 721 is configured to insert the back-to-back TC according to the indication of the insertion indication unit 712.
  • the activation unit 722 is configured to activate the first TC 731 and the second TC 732 according to the indication of the activation indication unit 713 for TFO negotiation.
  • FIG. 9 is a schematic diagram of transparent transmission of compressed speech according to an embodiment of the present invention.
  • C1 is the Context instance of H.248, and T1 and T2 are the endpoint instances of H.248.
  • C1 associates T1 with T2, for example, indicating that the media stream input from T1 is output from T2, or vice versa.
  • TFO can still be performed between the TC 911 and the TC 912 when the voice call satisfies the TrFO condition.
  • Negotiate bypass the codec function of the back-to-back TC, thereby improving voice quality.
  • the present invention is applicable not only to a media gateway but also to a similar device having a media gateway function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Description

实现分组 -分组模型会话的方法和媒体网关 本申请要求于 2006 年 3 月 29 日提交中国专利局、 申请号为 200610034804.9、 发明名称为 "实现分组-分组模型会话的方法和媒体网 关"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信领域的媒体承载技术, 具体地说涉及实现分组 -分组 模型会话的方法和媒体网关。
背景技术
在分离架构下, 一种灵活的可支持综合业务并具有长期演进能力的媒 体网关 (MGW, Media Gateway )可以采用如图 1所示的逻辑结构。 在图 1 中, MGW 100 包括操作维护管理 ( OAM, Operation Administration Maintenance )单元 110、 窄带单元 120、 宽带单元 130、 编解码池 140和 控制单元 150。
OAM单元 110提供整个系统的操作维护功能, 同时提供对外部运营 支撑系统的接口。 窄带单元 120提供对窄带侧的接口和协议处理功能。 宽 带单元 130提供到宽带侧的接口和协议处理功能。 编解码池 140提供媒体 处理资源, 如码转换的编解码器(TC, Transcoder )0 控制单元 110提供到 媒体网关控制器( MGC , Media Gateway Controller ) 的垂直接口, 处理并 根据来自 MGC的控制指令, 驱动内部的窄带单元 120、 宽带单元 130、 编 解码池 140等组件工作, 如在不同承载格式的端点之间插入 TC、 激活 TC 上的 TFO ( Tandem Free Operation , 串接无关操作)协议、 满足 TrFO ( Transcoder Free Operation, 编解码无关操作 )条件时直接连通会话中的 两侧承载端点, 等等。
MGW的一个很重要的功能就是承载和媒体格式转换, 由编解码池中 的 TC完成。 依赖于现有的编解码技术, TC通常实现成一端 PCM ( Pulse Code Modulation, 脉冲编码调制)、 另一端分组压缩的结构, 可以很方便 地实现 TDM-分组会话模型 (指会话中一端承载格式基于 TDM技术, 而 另一端基于分组技术) 的编解码转换。 图 2是现有技术中 TC编解码的示 意图。 数字语音信号 DS0经过 TC 200进行 G.723压缩算法处理之后得到 压缩语音帧 G.723/IP。
实际上,分组-分组会话模型 (指会话两端的承载格式都基于分组技术 ) 也需要类似的编解码转换。 由于技术实现的复杂性, 直接进行分组编解码 到分组编解码的转换是很难实现的。但是可以使用两个 TDM-分组模型下 的 TC, 使其通过各自的 PCM侧串接起来, 就可以实现任意分组编解码到 任意分组编解码的转换。 两个串接的 TC称作背靠背 TC。 图 3是现有技术 中背靠背 TC 的示意图。 如图 3 所示, 在一个方向上, AMR ( Adaptive Multi-Rate, 自适应多速率)算法压缩的语音帧被第一 TC 310恢复成中间 DS0上的抽样信号, 第二 TC 320再将其按 G.723 算法压缩成对应的压缩 语音帧 (已经不同于前面的 AMR压缩语音帧)。 在另一个方向上, 按类 似方式处理。 然而, 每一次的编解码对语音质量都会带来一定的损伤。
在现有技术中, 有两种方式可以实现直接传送编码, 而无需编解码转 换, 这就是 TrFO和 TFO功能。
TFO是一种带内的通信技术。在呼叫建立之后对使用的编解码进行协 商, 并且在协商结果表明两端所用的编解码满足 TFO 兼容条件时, 则两 端的编解码功能被旁路, 直接将压缩语音帧传递给接收方。
请参阅图 4,图 4是现有技术中的 TFO模型的逻辑结构示意图。其中, 两端的压缩算法分别为 FR— AMR和 HR— AMR,第一 TC 411和第二 TC 421 分属第一 MGW 410和第二 MGW 420,通过 TDM电路连接起来, TDM 电 路是基于 PCM抽样编码的结构。第一 TC 410和第二 TC 420通过 TDM 电 路上抽样信号的部分比特位来传递 TFO信息, 在 MGC (图未示) 的控制 下进行 TFO协商。
TrFO是一种带外的代码转换控制技术, 网络可以在呼叫建立前就对 编解码的类型和模式进行协商。 如果两端使用的编解码满足 Ti'FO兼容条 件 (例如, 都是 AMR编解码并且配置相同), 则呼叫可以不经过编解码转 换。
请再次参阅图 1所示的 MGW的逻辑架构, TFO操作是由编解码池 中的 TC来完成的, 而 TrFO则主要体现为控制和协调工作。 无论是 TFO 还是 Ti'FO操作, 其控制和协调工作都是在控制单元 150中完成的。 通常 在这种操作过程中, 控制单元 150也会与 MGC 进行交互, 如激活 /去激 活 TFO受控于 MGC,判决 Ti'FO操作条件是根据来自 MGC 的媒体编解 码参数进行的。
对于某些媒体网关, 因为架构的原因导致其不可能实现 TrFO, 如缺 乏恰当的分组交换平面,分组交换平面是 TrFO操作的重要技术要素之一。 对于这种网关, 可以利用前述的背靠背 TC来实现分组-分組承载转换。
而对于另一些媒体网关, 则因为技术复杂性的关系, 可能只会部分的 实现 TrFO协议。例如: WCDMA ( Wideband Code Division Multiple Access , 宽带码分多址)的 AMR应用, ACS ( Active Codec Mode Set, 激活的编解 码模式集)兼容并且所用的编解码模式可以通过速率控制的手段限制在一 个公共子集内, 这是一个满足 TrFO条件的呼叫配置, 但是因为速率协调 在技术上比较复杂, 并且对于系统性能有一定影响, 在系统实现时就可能 被舍弃,导致此种情况下分组 -分组会话模型仍然插入 TC,采用背靠背 TC 技术的媒体网关插入的就是背靠背 TC。
对于这两类对 TrFO协议完全不支持或者支持不充分的媒体网关, 插 入背靠背 TC的结果是导致语音质量下降, 这是因为满足 TrFO/TFO条件 的会话插入背靠背 TC后, 每一次的编解码对语音质量都会带来一定的损 伤。
发明内容
本发明针对不支持 TrFO或者有限支持 TrFO能力的情况,提供能够克 服语音质量耗损的实现分组 -分组模型会话的方法和媒体网关。
根据第一方面,本发明提供一种实现分组-分组模型会话的方法, 所述 方法包括: 在确定对于所述会话不采用 TrFO†办议处理的情况下, 插入背 靠背 TC; 激活所述背靠背 TC, 使之进行 TFO协商; 在协商通过后, 使 背靠背 TC工作在直通模式。
在第一方面中, 可选地, 所述插入和激活的步骤由媒体网关实施。 根据第二方面, 提供一种媒体网关, 包括: 控制单元和编解码池单元; 所述控制单元用于在确定对于满足分组-分组模型的会话不采用 Ti'FO协议 处理的情况下,指示编解码池单元插入背靠背 TC; 并指示编解码池单元激 活所述背靠背 TC, 使之进行 TFO协商;
所述背靠背 TC用于进行 TFO协商, 在 TFO协商通过后工作在直通 模式, 透传压缩语音。
根据本发明的实施例,对于不支持 TrFO或者有限支持 TrFO能力,而 实现了 TFO协议和背靠背 TC的 MGW, 当话音呼叫满足 TrFO条件时, 通过激活背靠背 TC进行 TFO协商, 仍然可以旁路背靠背 TC的编解码功 能, 从而提高语音质量。
附图说明
图 1是现有技术中的一种 MGW的逻辑结构示意图;
图 2是现有技术中 TC编解码的示意图;
图 3是现有技术中的背靠背 TC的示意图;
图 4是现有技术中的 TFO模型的逻辑结构示意图;
图 5是本发明实施例的背靠背模型的逻辑结构示意图
图 6是本发明实施例的实现分组-分组模型会话的方法的流程图; 图 7是本发明实施例的媒体网关的结构示意图;
图 8 是本发明实施例的媒体网关中的控制单元和编解码池的结构框 图;
图 9是根据本发明实施例透传压缩语音的示意图。
具体实施方式
图 5是本发明的实施例的背靠背模型的逻辑结构示意图。 两端的压缩 算法分别为 FR— AMR和 HR— AMR。第一 TC 510和第二 TC 520属于同一 个 MGW, 中间通过 MGW 内部的时分交换总线实现连接, 所述时分交换 总线基于 PCM 的抽样信号原理。
本发明的实施例中, 背靠背 TC本质上是两个独立的 TC 510和 520 通过 TDM通道连接起来, 可以在 TDM通道上执行 TFO操作。 所述 TFO 操作不是在 MGC的控制下使能和禁止的, 而是需要 MGW自行进行激活 和去激活处理。 因为这种背靠背 TC连接的分组到分组拓朴, 在 MGC角 度来看是不满足 TFO操作的条件。
下面对本发明实施例的具体操作过程进行描述。
请参阅图 6, 本发明实施例的流程包括:
步骤 S610,控制单元在处理来自 MGC的指令时对会话端点的承载格 式参数进行检查。
步骤 S620, 对于满足分组 -分组模型的会话: 如果 MGW完全不支持 TrFO协议, 则会直接插入背靠背 TC;
步驟 S630, 如果 MGW只是部分地实现了 TrFO协议(此处指部分满 足 TrFO条件的会话会被当作不满足条件的情况处理),则在检查发现两侧 承载的媒体参数不满足已经实现的 TrFO条件时插入背靠背 TC。
步驟 S640, 才 据本发明的实施例, 在插入背靠背 TC时, 控制单元会 自行(毋须 MGC控制)给编解码池下发指示以激活捆绑到一起的两个 TC上的 TFO状态机,具体实现时只需要在通信接口中加入相关参数即可。
步骤 S650, 背靠背的两个 TC上的 TFO状态机被激活之后, 都会启 动向对方的 TFO协商。
步骤 S660, 如果协商通过, 两个 TC之间就会工作在直通模式, 即编 解码功能被旁路, 压缩语音被透传, 语音廣量耗损得以免除。
请参阅图 7, 是本发明实施例 '的 MGW的结构框图。
本发明实施例的 MGW包括控制单元 710、 编解码池单元 720。
其中,编解码池单元 720提供背靠背 TC,背靠背 TC包括第一 TC 731 和第二 TC 732, 第一 TC 731和第二 TC 732通过 MGW内部的时分交换 总线连接。
控制单元 710用于在确定对于满足分组-分组模型的会话不釆用 TrFO 协议处理的情况下,指示编解码池单元 720插入背靠背 TC并激活第一 TC 731和第二 TC 732进行 TFO协商。
第一 TC 731和第二 TC 732用于进行 TFO协商, 在 TFO协商通过后 透传压缩语音。
请参阅图 8, 在一个实施例中, 控制单元 710包括:
承载格式参数检查单元 711 , 用于在处理来自 MGW的指令时对会话 端点的承载格式参数进行检查, 确定对于会话是否采用 TrFO协议进行处 理;
插入指示单元 712, 用于在所述承载格式参数检查单元 712确定对于 会话不采用 Ti'FO协议进行处理时,指示编解码池单元 720插入背靠背 TC; 激活指示单元 713, 用于在插入背靠背 TC后, 指示编解码池单元 720 激活第一 TC 731和第二 TC 732进行 TFO协商。
所述编解码池单元 720包括:
插入单元 721,用于根据所述插入指示单元 712的指示插入背靠背 TC; 激活单元 722, 用于根据所述激活指示单元 713 的指示激活第一 TC 731和第二 TC 732进行 TFO协商。
图 9是才艮据本发明实施例透传压缩语音的示意图。如图 9所示, C1 是 H.248的 Context (上下文) 实例, T1和 T2是 H.248的端点实例。 C1将 T1和 T2关联起来, 例如, 指明从 T1输入的媒体流从 T2输出, 或者与之 相反。 根据本发明的实施例, 对于不支持 TrFO或者有限支持 TrFO能力 , 而实现了 TFO协议和背靠背 TC 910的 MGW 900, 当话音呼叫满足 TrFO 条件时, 仍然可以在 TC 911和 TC 912之间进行 TFO协商, 旁路背靠背 TC的编解码功能, 从而提高语音质量。
需要说明的是, 本发明不仅适用于媒体网关, 还适用于具有媒体网关 功能的类似设备。
显而易见, 在此描述的本发明可以有许多变化, 这种变化不能认为偏 离本发明的精神和范围。 因此, 所有对本领域技术人员显而易见的改变, 都包括在本权利要求书的涵盖范围之内。

Claims

权 利 要 求
1、 一种实现分组 -分组模型会话的方法, 其特征在于, 包括: 在确定对于所述会话不采用编解码无关操作 TrFO处理的情况下, 插 入背靠背编解码器 TC;
激活所述背靠背 TC, 使之进行串接无关操作 TFO协商;
在协商通过后, 背靠.背 TC工作在直通模式。
2、 如权利要求 1所述的方法, 其特征在于: 所述插入背靠背 TC和激 活所述背靠背 TC的过程由媒体网关实施。
3、 如权利要求 1所述的方法, 其特征在于: 所述确定对于所述会话不 采用 TrFO协议处理的情况包括媒体网关完全不支持 TrFO协议或部分实现
TrFO协议。
4、 如权利要求 1所述的方法, 其特征在于: 所述确定对于所述会话不 采用 TrFO 办议处理的情况的过程包括: 检查两侧承载的媒体参 :是否满 足媒体网关中实现的 TrFO条件。
5、 如权利要求 1所述的方法, 其特征在于: 所述确定对于所述会话不 采用 TrFO协议处理的情况的过程, 包括: 媒体网关的控制单元检查会话 端点的承载格式参数; 在媒体网关完全不支持 TrFO或者两侧承载的媒体 参数不满足已实现的 TrFO条件时,确定对于所述会话不采用 TrFO协议处 理。
6、 如权利要求 5所述的方法, 其特征在于, 所述插入背靠背 TC, 包 括:
所述媒体网关的控制单元向媒体网关的编解码池下发插入背靠背 TC 的指示;
所述编解码池根据所述指示插入背靠背 TC。
7、 根据权利要求 6 所述的方法, 其特征在于, 所述激活所述背靠背
TC, 包括:
所述控制单元向编解码池下发激活指示;
所述编解码池根据所述指示激活背靠背 TC的 TFO协商。
8、 根据权利要求 7 所述的方法, 其特征在于, 所述激活所述背靠背 TC的 TFO协商是通过激活背靠背 TC的两个 TC上的状态机进行的。
9、 才艮据权利要求 7所述的方法, 其特征在于, 所述控制单元向编解码 池下发激活指示是通过在通信接口中加入相关参数实现的。
10、 一种媒体网关, 包括: 控制单元和编解码池单元, 其特征在于, 所述控制单元用于在确定对于满足分组-分组模型的会话不采用 TrFO 协议处理的情况下,指示编解码池单元插入背靠背 TC; 并指示编解码池单 元激活所述背靠背 TC, 使之进行 TFO协商;
所述背靠背 TC用于进行 TFO协商,在 TFO协商通过后工作在直通模 式, 透传压缩语音。
11、如权利要求 10所述的媒体网关,其特征在于:所述控制单元包括: 承载格式参数检查单元, 用于对会话端点的承载格式参数进行检查, 确定对于会话是否采用 TrFO协议进行处理;
插入指示单元, 用于在所述承载格式参数检查单元确定对于会话不采 用 TrFO协议进行处理时, 指示编解码池单元插入背靠背 TC;
激活指示单元, 用于指示编解码池单元激活所述插入的背靠背 TC进 行 TFO协商。
12、 如如权利要求 11 所述的媒体网关, 其特征在于: 所述编解码池 单元包括:
插入单元, 用于;^据所述插入指示单元的指示插入背靠背 TC;
激活单元, 用于根据所述激活指示单元的指示激活所述插入的背靠背
TC进行 TFO协商。
PCT/CN2006/003116 2006-03-29 2006-11-20 Procédé pour la mise en oeuvre d'une session selon le modèle paquet-paquet, et passerelle multimédia associée WO2007109935A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200680012830XA CN101160888B (zh) 2006-03-29 2006-11-20 实现分组-分组模型会话的方法和媒体网关

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2006100348049A CN100484304C (zh) 2006-03-29 2006-03-29 实现分组-分组模型会话的方法和媒体网关
CN200610034804.9 2006-03-29

Publications (1)

Publication Number Publication Date
WO2007109935A1 true WO2007109935A1 (fr) 2007-10-04

Family

ID=37484769

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/003116 WO2007109935A1 (fr) 2006-03-29 2006-11-20 Procédé pour la mise en oeuvre d'une session selon le modèle paquet-paquet, et passerelle multimédia associée

Country Status (6)

Country Link
US (1) US20070230448A1 (zh)
EP (1) EP1841153B1 (zh)
CN (2) CN100484304C (zh)
AT (1) ATE447817T1 (zh)
DE (1) DE602007003040D1 (zh)
WO (1) WO2007109935A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8369267B2 (en) * 2007-01-18 2013-02-05 Telefonaktiebolaget Lm Ericsson (Publ) Technique for controlling establishment of a tandem-free transcoder operation
CN101304591B (zh) * 2008-06-06 2013-06-05 中兴通讯股份有限公司 一种无二次编解码操作下行同步监控方法
CN103871415B (zh) * 2012-12-14 2017-08-25 中国电信股份有限公司 实现异系统间语音互通的方法、系统与tfo转换装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003094555A2 (en) * 2002-05-02 2003-11-13 Nortel Networks Limited Tfo communication apparatus with codec mismatch resolution and/or optimization logic
CN1553723A (zh) * 2003-06-08 2004-12-08 华为技术有限公司 一种实现移动通信网络互通的方法
CN1655631A (zh) * 2004-02-12 2005-08-17 阿尔卡特公司 在公共陆地移动网基础设施的核心网中传输压缩语音方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5768308A (en) * 1994-12-19 1998-06-16 Northern Telecom Limited System for TDMA mobile-to-mobile VSELP codec bypass
JP3449353B2 (ja) * 2000-12-13 2003-09-22 日本電気株式会社 通信方式およびトランスコーダのアライメント方法
ES2287462T3 (es) * 2002-04-24 2007-12-16 Telefonaktiebolaget Lm Ericsson (Publ) Elusion de operaciones de transcodificacion en una red de comunicacion.
US7203226B1 (en) * 2002-11-14 2007-04-10 Nortel Networks Limited Methods and apparatus for data communication
WO2004075582A1 (en) * 2003-02-21 2004-09-02 Nortel Networks Limited Data communication apparatus and method for establishing a codec-bypass connection
US20070140293A1 (en) * 2005-12-16 2007-06-21 Anjana Agarwal RFCI mapping to support backward-compatible transcoder-free operation for UMTS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003094555A2 (en) * 2002-05-02 2003-11-13 Nortel Networks Limited Tfo communication apparatus with codec mismatch resolution and/or optimization logic
CN1553723A (zh) * 2003-06-08 2004-12-08 华为技术有限公司 一种实现移动通信网络互通的方法
CN1655631A (zh) * 2004-02-12 2005-08-17 阿尔卡特公司 在公共陆地移动网基础设施的核心网中传输压缩语音方法

Also Published As

Publication number Publication date
CN101160888A (zh) 2008-04-09
EP1841153B1 (en) 2009-11-04
EP1841153A1 (en) 2007-10-03
DE602007003040D1 (de) 2009-12-17
ATE447817T1 (de) 2009-11-15
CN1874557A (zh) 2006-12-06
CN101160888B (zh) 2011-07-06
US20070230448A1 (en) 2007-10-04
CN100484304C (zh) 2009-04-29

Similar Documents

Publication Publication Date Title
EP1845687B1 (en) A method for ip-based service transmission
US8031728B2 (en) Method of controlling audio communication on a network
US20070165636A1 (en) Methods, systems, and computer program products for providing transcoder free operation (TrFO) and interworking between unlicensed mobile access (UMA) and universal mobile telecommunications system (UMTS) call legs using a media gateway
JP2012523199A (ja) セッションネゴシエーションのための方法及び装置
US7203226B1 (en) Methods and apparatus for data communication
WO2007062418A9 (en) Media gateway control protocol (mgcp) package for voice over internet protocol (voip) telecommunication transmissions
US7639601B2 (en) Methods and apparatus for data communication
US20060182131A1 (en) Gateway interface control
WO2007076669A1 (fr) Procédé, dispositif, et système pour traiter un flux de données
WO2021073155A1 (zh) 视频会议方法、装置、设备及存储介质
WO2007109935A1 (fr) Procédé pour la mise en oeuvre d'une session selon le modèle paquet-paquet, et passerelle multimédia associée
US8942244B2 (en) Circuit and method of autonomous FoIP/MoIP/ToIP call establishment
US7409462B2 (en) Packet communication control device and packet communication control method
WO2007131397A1 (fr) Procédé et système de transmission avec redondance des données
WO2007098657A1 (fr) Procédé et réseau destinés à la transmission de services multiples du centre de jonction basé sur ip
WO2008040186A1 (fr) Procédé, système et passerelle destinés à négocier la capacité d'un détecteur de signal des données
KR101684404B1 (ko) 서로 다른 두 개의 운영체제를 사용하는 휴대용 단말기에서 서비스품질의 데이터 서비스를 지원하기 위한 방법 및 장치
WO2005053232A1 (fr) Procede de traitement par fax dans un reseau de nouvelle generation
CN100505656C (zh) 调制解调器中继聚合器设备
Cisco G.Clear, GSMFR, and G.726 Codecs and Modem and Fax Passthrough for Cisco Universal Gateways
WO2010012141A1 (zh) 一种媒体网关间的双音多频信号的参数协商方法及系统
WO2008049322A1 (fr) Procédé et système permettant de libérer un appel au cours d'un service multimédia relié à un réseau séparé
JP2012100126A (ja) VoIP端末、ネットワークファクシミリシステム及びそれらに用いる通信品質向上方法
WO2009036698A1 (fr) Procédé, système et dispositif pour une transmission de données
JP3970805B2 (ja) ゲートウェイ装置及び保留音送出方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200680012830.X

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 06817854

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06817854

Country of ref document: EP

Kind code of ref document: A1