CN101052021A - NGN network based on PSTN network structure - Google Patents

NGN network based on PSTN network structure Download PDF

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CN101052021A
CN101052021A CN200610080537.9A CN200610080537A CN101052021A CN 101052021 A CN101052021 A CN 101052021A CN 200610080537 A CN200610080537 A CN 200610080537A CN 101052021 A CN101052021 A CN 101052021A
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network
pstn
tdm
ngn
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赵波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2006/003247 priority patent/WO2007131398A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • 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
    • 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
    • H04L65/1026Media gateways at the edge
    • 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
    • H04L65/1036Signalling gateways at the edge

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

Abstract

本发明涉及通讯技术领域中一种基于PSTN网络构造的NGN网络,在PSTN网络中的时分复用TDM网络中设置支持IP over E1接口的媒体网关MG,所述MG向下接入用户,向上出IP over E1接口,经过TDM传输网络接入IP网络。本发明利用支持IP over E1接口的MG替换PSTN网络中的交换机节点或者远端交换模块、远端接入模块,实现了在不新增IP网络、不改动已有TDM传输网络的基础上,将PSTN网络改造成NGN网络的一部分。在重用已有网络基础设施、节省投资的基础上,能够将用户接入NGN网络,享受NGN网络的各种业务。

The present invention relates to an NGN network based on PSTN network structure in the technical field of communication. A media gateway MG supporting IP over E1 interface is set in the time division multiplexing TDM network in the PSTN network. The MG accesses users downwards and exits upwards The IP over E1 interface is connected to the IP network through the TDM transmission network. The present invention uses the MG that supports the IP over E1 interface to replace the switch node or the remote switching module and the remote access module in the PSTN network. The PSTN network is transformed into a part of the NGN network. On the basis of reusing the existing network infrastructure and saving investment, users can be connected to the NGN network and enjoy various services of the NGN network.

Description

一种基于PSTN网络构造的NGN网络A NGN Network Based on PSTN Network Construction

技术领域technical field

本发明涉及通讯技术领域,尤其涉及一种基于PSTN网络构造的NGN网络。The invention relates to the technical field of communication, in particular to an NGN network constructed based on a PSTN network.

背景技术Background technique

PSTN(公共电话交换网)网络是有层次结构的固定电信业务网络,通常由不同级别的交换机组成,交换机下还可以连接有远端交换模块、远端接入模块、V5接入网、WLL(无线本地环路)、PBX(小交换机)等网络设备。交换机与所述网络设备之间通过基于TDM(时分复用)技术的传输网络连接,包括基于E1、T1、SDH(同步数字体系)、或SONET(同步光纤网)技术直连或者通过传输设备构成的传输网络连接。PSTN (Public Switched Telephone Network) network is a fixed telecommunications service network with a hierarchical structure, usually composed of switches of different levels, and remote switching modules, remote access modules, V5 access networks, WLL ( Wireless local loop), PBX (Public Exchange) and other network equipment. The switch and the network equipment are connected through a transmission network based on TDM (Time Division Multiplexing) technology, including direct connection based on E1, T1, SDH (Synchronous Digital Hierarchy), or SONET (Synchronous Optical Network) technology or formed by transmission equipment transmission network connection.

NGN网络是基于IP技术的,是控制和承载分离的网络。对于PSTN网络现有的用户,包括:POTS(传统普通电话业务)/ISDN(综合业务数字网)、PBX、V5接入网、WLL等用户,或来自其他PSTN网络的用户,通常采用MGC+MG的方式接入NGN(下一代网络)网络。其中MGC(媒体网关控制)具有处理PSTN用户的呼叫控制功能;MG(媒体网关)用于将PSTN用户的媒体业务流从基于TDM技术的承载格式转换成基于IP的承载格式,从而与NGN网络中的其他用户互通。NGN network is based on IP technology, and it is a network separated from control and bearer. For existing PSTN users, including: POTS (traditional ordinary telephone service)/ISDN (Integrated Services Digital Network), PBX, V5 access network, WLL and other users, or users from other PSTN networks, MGC+MG is usually used access to the NGN (Next Generation Network) network. Among them, MGC (media gateway control) has the call control function of handling PSTN users; MG (media gateway) is used to convert the media service flow of PSTN users from the bearer format based on TDM technology to the bearer format based on IP, so as to communicate with the NGN network communicate with other users.

随着技术的发展和进步,PSTN网络将逐步向NGN网络演进。现有技术在将PSTN网络改造成NGN网络时,通过新增路由器和/或数据传输网络的方法新增IP网络,并且直接连接网关到新增的IP网络。With the development and progress of technology, PSTN network will gradually evolve to NGN network. In the prior art, when transforming a PSTN network into an NGN network, an IP network is added by adding a router and/or a data transmission network, and a gateway is directly connected to the newly added IP network.

由上述叙述可知,由于IP网络一般由路由器及数据传输网络构成,新增IP网络一般意味着废弃或改动现有的TDM传输网络,造成运营商原来的投资损失,从而增加运营商成本。As can be seen from the above description, since IP networks are generally composed of routers and data transmission networks, adding an IP network generally means abandoning or modifying the existing TDM transmission network, resulting in loss of original investment by the operator, thereby increasing the cost of the operator.

发明内容Contents of the invention

本发明的目的在于提供一种基于PSTN网络构造的NGN网络。The purpose of the present invention is to provide an NGN network constructed based on the PSTN network.

本发明的目的是通过以下技术方案实现的:The purpose of the present invention is achieved through the following technical solutions:

一种基于PSTN网络构造的NGN网络,包括:在PSTN网络中的时分复用TDM网络中设置支持IP over E1接口的媒体网关MG,所述MG向下接入用户,向上出IP over E1接口,经过TDM传输网络接入IP网络。A kind of NGN network based on PSTN network structure, comprises: the media gateway MG that supports IP over E1 interface is set in the time division multiplexing TDM network in PSTN network, described MG inserts user downwards, goes out IP over E1 interface upwards, Access the IP network through the TDM transmission network.

所述TDM网络与IP网络边界设置有支持IP over E1接口的路由器,用于终结IP over E1连接;或,The border between the TDM network and the IP network is provided with a router supporting an IP over E1 interface for terminating the IP over E1 connection; or,

设置有支持IP over E1接口及路由转发功能的MG,用于终结IP over E1连接。Set up an MG that supports IP over E1 interface and routing and forwarding functions to terminate IP over E1 connections.

在所述MG和IP网络之间设置一个或多个支持路由转发功能的MG。One or more MGs supporting routing and forwarding functions are set between the MG and the IP network.

所述MG利用压缩媒体编码格式传输媒体流。The MG uses a compressed media encoding format to transmit media streams.

所述MG利用压缩空余的带宽作为冗余路由,规避TDM传输网络和转发节点的故障。The MG uses the compressed spare bandwidth as a redundant route to avoid failures of the TDM transmission network and forwarding nodes.

媒体数据流在TDM网络上传输时,采用IP包的形式,承载在TDM中继时隙上传输。When the media data flow is transmitted on the TDM network, it adopts the form of IP packet and is carried on the TDM relay time slot for transmission.

媒体数据流在TDM网络上传输时,采用MPLS包的形式,使媒体流直接承载在MPLS上传输。When the media data stream is transmitted on the TDM network, it adopts the form of MPLS packets, so that the media stream is directly carried on the MPLS for transmission.

媒体数据流在TDM网络上传输时,媒体流以IP包的形式承载在MPLS上传输。When the media data flow is transmitted on the TDM network, the media flow is carried on the MPLS in the form of IP packets.

在TDM网络上传输媒体流时,数据包承载在基于时分复用技术的数字电路上。When transmitting media streams on a TDM network, data packets are carried on digital circuits based on time-division multiplexing technology.

由上述本发明提供的技术方案可以看出,本发明利用支持IP over E1接口的MG替换PSTN网络中的交换机节点或者远端交换模块、远端接入模块,实现了在不新增IP网络、不改动已有TDM传输网络的基础上,将PSTN网络改造成NGN网络的一部分。在重用已有网络基础设施、节省投资的基础上,能够将用户接入NGN网络,享受NGN网络的各种业务。As can be seen from the technical solution provided by the present invention above, the present invention utilizes the MG that supports the IP over E1 interface to replace the switch node or the remote switching module and the remote access module in the PSTN network, thereby achieving a new IP network, On the basis of not changing the existing TDM transmission network, transform the PSTN network into a part of the NGN network. On the basis of reusing the existing network infrastructure and saving investment, users can be connected to the NGN network and enjoy various services of the NGN network.

附图说明Description of drawings

图1为本发明所述方法一种实施例组网示意图;Fig. 1 is a schematic diagram of networking of an embodiment of the method of the present invention;

图2为MG和TDM边界上设置多个MG组网示意图。Fig. 2 is a schematic diagram of networking of multiple MGs set on the boundary between the MG and the TDM.

具体实施方式Detailed ways

本发明的核心思想是提供一种基于PSTN网络构造的NGN网络,利用支持IP over E1接口的MG替换PSTN网络中的交换机节点或者远端交换模块、远端接入模块,可以在不新增IP网络、不改动已有TDM传输网络的基础上,将PSTN网络改造成NGN网络。The core idea of the present invention is to provide a NGN network based on the PSTN network structure, and use the MG supporting IP over E1 interface to replace the switch node or the remote switching module and the remote access module in the PSTN network. Network, on the basis of not changing the existing TDM transmission network, transform the PSTN network into an NGN network.

本发明提供了一种基于PSTN网络构造的NGN网络,其一种实施例改造后的组网如图1所示,在PSTN网络现有的TDM网络中设置MG,所述MG支持IP over E1接口,该MG向下接入POTS/ISDN、PBX、V5接入网、WLL接入网或其他类型的用户,向上出IP over E1接口,经过TDM传输网络接入IP网络。由MGC实现对IP网络的呼叫控制。The present invention provides a kind of NGN network based on PSTN network structure, and the networking after the transformation of one embodiment is shown in Figure 1, in the existing TDM network of PSTN network, MG is set, and described MG supports IP over E1 interface , the MG connects downward to POTS/ISDN, PBX, V5 access network, WLL access network or other types of users, upwards through the IP over E1 interface, and accesses the IP network through the TDM transmission network. The call control of the IP network is implemented by the MGC.

在TDM网络和IP网络的边界上,可以设置支持IP over E1接口的路由器,用于从TDM中继时隙中取出IP包,向IP网络转发,从而终结IP over E1连接。On the boundary between TDM network and IP network, a router supporting IP over E1 interface can be set up to take out IP packets from TDM relay time slots and forward them to the IP network, thereby terminating the IP over E1 connection.

在所述TDM网络和IP网络的边界上,也可以利用支持IP over E1并且与IP网络存在连接的MG进行转发,此时此MG需要支持路由转发功能。On the boundary between the TDM network and the IP network, the MG that supports IP over E1 and is connected to the IP network can also be used for forwarding. At this time, the MG needs to support the routing and forwarding function.

在MG和TDM边界上支持IP over E1接口的路由器或MG之间,可以设置多个MG进行媒体流转发,如图2所示,所述中间的MG亦需要支持路由转发功能。Between the routers or MGs supporting IP over E1 interfaces on the MG and TDM borders, multiple MGs can be set up for forwarding media streams, as shown in Figure 2, the intermediate MGs also need to support routing and forwarding functions.

媒体数据流在TDM网络上传输时,可以采用IP包的形式,其承载在TDM中继时隙上传输。When the media data flow is transmitted on the TDM network, it may be in the form of an IP packet, which is carried on the TDM relay time slot for transmission.

在TDM网络上传输媒体流时,除使用VoIP over E1的承载格式外,也可以通过VoMPLS over E1,或VoIP over MPLS over E1的承载格式传输。如采用MPLS包的形式,使媒体流直接承载在MPLS上,即VoMPLS形式。或媒体流以IP包的形式承载在MPLS上,即VoIPoMPLS形式。此时接入用户的MG、及IP网络边界的路由器或MG需要支持MPLS中LER(标签边缘路由器)设备的功能;中间的MG需要支持MPLS网络中LSR(标签交换路由器)设备的功能。When transmitting media streams on the TDM network, in addition to using the bearer format of VoIP over E1, it can also be transmitted through the bearer format of VoMPLS over E1 or VoIP over MPLS over E1. For example, the form of MPLS package is used to directly carry the media stream on MPLS, that is, the form of VoMPLS. Or the media flow is carried on the MPLS in the form of IP packets, that is, the form of VoIPoMPLS. At this time, the MG that accesses the user, and the router or MG at the edge of the IP network need to support the function of the LER (Label Edge Router) device in MPLS; the intermediate MG needs to support the function of the LSR (Label Switching Router) device in the MPLS network.

在TDM网络上传输媒体流时,VoIP、VoMPLS、VoMPLSoIP等承载格式的数据包也可以承载在T1、SDH、SONET或其他基于时分复用技术的数字电路上。When transmitting media streams on a TDM network, data packets in VoIP, VoMPLS, VoMPLSoIP and other bearer formats can also be carried on T1, SDH, SONET or other digital circuits based on time-division multiplexing technology.

由于MG可以实现对媒体数据流进行压缩,因此在传输媒体流时可以采用压缩编解码格式,对媒体数据进行压缩,如将PCM编码格式的语音流压缩成G.729编码格式的语音流,媒体数据流在TDM网络上传输时,带宽的占用可以大大减少,例如,当采用G.729压缩编码格式时可以相对传统的交换机节省37Kbps带宽,若接入MG和NGN网络边界上的路由器或MG都支持压缩编解码格式,则占用带宽可以进一步节省约52Kbps。Since the MG can compress the media data stream, the compression codec format can be used to compress the media data when transmitting the media stream. When the data flow is transmitted on the TDM network, the bandwidth occupation can be greatly reduced. For example, when using the G.729 compression encoding format, it can save 37Kbps bandwidth compared with the traditional switch. If the compression codec is supported, the occupied bandwidth can be further saved by about 52Kbps.

在带宽占用大大减少的情况下,空余的带宽可以用于冗余路由,利用冗余路由可以规避TDM传输网络和转发节点的故障,提高可靠性。例如,接入MG可以同时配置两条或更多的路由,分别到达不同的NGN网络边界路由器或MG。如果由于TDM传输网络或者边界路由器或MG故障等原因导致正在使用的路由出现问题,可以改用其他的路由,提高网络的可靠性。When the bandwidth occupation is greatly reduced, the spare bandwidth can be used for redundant routing, which can avoid failures of TDM transmission network and forwarding nodes and improve reliability. For example, the access MG can configure two or more routes at the same time to reach different NGN network border routers or MGs respectively. If there is a problem with the route being used due to the failure of the TDM transmission network or border router or MG, you can switch to another route to improve network reliability.

综上所述,本发明利用支持IP over E1接口的MG替换PSTN网络中的交换机节点或者远端交换模块、远端接入模块,实现了在不新增IP网络、不改动已有TDM传输网络的基础上,将PSTN网络改造成NGN网络的一部分。在重用已有网络基础设施、节省投资的基础上,能够将用户接入NGN网络,享受NGN网络的各种业务。To sum up, the present invention utilizes the MG that supports IP over E1 interface to replace the switch node or the remote switching module and the remote access module in the PSTN network, and realizes the new IP network without changing the existing TDM transmission network. Transform the PSTN network into a part of the NGN network on the basis of the network. On the basis of reusing the existing network infrastructure and saving investment, users can be connected to the NGN network and enjoy various services of the NGN network.

以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应该以权利要求的保护范围为准。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1、一种基于PSTN网络构造的NGN网络,其特征在于,包括:在PSTN网络中的时分复用TDM网络中设置支持IP over E1接口的媒体网关MG,所述MG向下接入用户,向上出IP over E1接口,经过TDM传输网络接入IP网络。1, a kind of NGN network based on PSTN network structure, it is characterized in that, comprising: the media gateway MG that supports IP over E1 interface is set in the time division multiplexing TDM network in PSTN network, described MG connects user downward, upward Out of the IP over E1 interface, through the TDM transmission network to access the IP network. 2、如权利要求1所述的一种基于PSTN网络构造的NGN网络,其特征在于,所述TDM网络与IP网络边界设置有支持IP over E1接口的路由器,用于终结IP over E1连接;或,2. A kind of NGN network based on PSTN network structure as claimed in claim 1, it is characterized in that, the border of described TDM network and IP network is provided with the router that supports IP over E1 interface, is used for terminating IP over E1 connection; Or , 设置有支持IP over E1接口及路由转发功能的MG,用于终结IP over E1连接。Set up an MG that supports IP over E1 interface and routing and forwarding functions to terminate IP over E1 connections. 3、如权利要求1或2所述的一种基于PSTN网络构造的NGN网络,其特征在于,在所述MG和IP网络之间设置一个或多个支持路由转发功能的MG。3. The NGN network based on PSTN network according to claim 1 or 2, characterized in that one or more MGs supporting routing and forwarding functions are set between the MG and the IP network. 4、如权利要求1所述的一种基于PSTN网络构造的NGN网络,其特征在于,所述MG利用压缩媒体编码格式传输媒体流。4. The NGN network constructed based on the PSTN network according to claim 1, wherein the MG uses a compressed media coding format to transmit media streams. 5、如权利要求4所述的一种基于PSTN网络构造的NGN网络,其特征在于,所述MG利用压缩空余的带宽作为冗余路由,规避TDM传输网络和转发节点的故障。5. The NGN network constructed based on the PSTN network according to claim 4, wherein the MG utilizes the compressed spare bandwidth as a redundant route to avoid failures of the TDM transmission network and forwarding nodes. 6、如权利要求1、4或5所述的一种基于PSTN网络构造的NGN网络,其特征在于,媒体数据流在TDM网络上传输时,采用IP包的形式,承载在TDM中继时隙上传输。6. A kind of NGN network based on PSTN network structure as claimed in claim 1, 4 or 5, it is characterized in that, when the media data stream is transmitted on the TDM network, it adopts the form of IP packet and carries it in the TDM relay time slot upload. 7、如权利要求1、4或5所述的一种基于PSTN网络构造的NGN网络,其特征在于,媒体数据流在TDM网络上传输时,采用MPLS包的形式,使媒体流直接承载在MPLS上传输。7. A kind of NGN network based on PSTN network structure as claimed in claim 1, 4 or 5, it is characterized in that, when the media data stream is transmitted on the TDM network, it adopts the form of MPLS packet, so that the media stream is directly carried on the MPLS upload. 8、如权利要求1、4或5所述的一种基于PSTN网络构造的NGN网络,其特征在于,媒体数据流在TDM网络上传输时,媒体流以IP包的形式承载在MPLS上传输。8. A PSTN-based NGN network according to claim 1, 4 or 5, wherein when the media data stream is transmitted on the TDM network, the media stream is carried on the MPLS in the form of IP packets. 9、如权利要求1、4或5所述的一种基于PSTN网络构造的NGN网络,其特征在于,在TDM网络上传输媒体流时,数据包承载在基于时分复用技术的数字电路上。9. A PSTN-based NGN network according to claim 1, 4 or 5, characterized in that when transmitting media streams on the TDM network, data packets are carried on digital circuits based on time-division multiplexing technology.
CN200610080537.9A 2006-05-15 2006-05-15 NGN network based on PSTN network structure Pending CN101052021A (en)

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CN101971692A (en) * 2007-12-20 2011-02-09 艾利森电话股份有限公司 Assignment and Handover in Radiocommunication Networks
CN101610326B (en) * 2009-07-09 2012-07-04 广州广哈通信有限公司 Method and system for simultaneously supporting voice and IP communication on E1 circuit
WO2012167553A1 (en) * 2011-11-15 2012-12-13 华为技术有限公司 Method and device for determining time slot configuration in time division modulation (tdm) transmission
CN103167195A (en) * 2013-04-10 2013-06-19 烽火通信科技股份有限公司 Communication system for supporting VOIP (voice over internet protocol) and PSTN (public switched telephone network) integration
CN107493401A (en) * 2016-06-12 2017-12-19 中兴通讯股份有限公司 Line status processing method and processing device

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EP1460860A1 (en) * 2003-03-19 2004-09-22 Siemens Aktiengesellschaft Method, system and apparatus for managing bearer connections in a telecommunications network
CN100382544C (en) * 2003-09-05 2008-04-16 华为技术有限公司 Realization Method and Transitional Network of Transformation from Traditional Telephone Switching Network to Next Generation Network

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Publication number Priority date Publication date Assignee Title
CN101971692A (en) * 2007-12-20 2011-02-09 艾利森电话股份有限公司 Assignment and Handover in Radiocommunication Networks
CN101610326B (en) * 2009-07-09 2012-07-04 广州广哈通信有限公司 Method and system for simultaneously supporting voice and IP communication on E1 circuit
WO2012167553A1 (en) * 2011-11-15 2012-12-13 华为技术有限公司 Method and device for determining time slot configuration in time division modulation (tdm) transmission
US8542701B2 (en) 2011-11-15 2013-09-24 Huawei Technologies Co., Ltd. Method and device for determining timeslot configuration in TDM transmission
CN103167195A (en) * 2013-04-10 2013-06-19 烽火通信科技股份有限公司 Communication system for supporting VOIP (voice over internet protocol) and PSTN (public switched telephone network) integration
CN103167195B (en) * 2013-04-10 2016-01-20 烽火通信科技股份有限公司 A kind of communication system supporting VOIP and the PSTN network integration
CN107493401A (en) * 2016-06-12 2017-12-19 中兴通讯股份有限公司 Line status processing method and processing device

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