ATM 网中话音通信技术的研究  

On Transport of Voice over ATM Network

作　　者：黄立群[1] 杨宗凯[1] 谢晓明[1] 黄载禄[1] 

机构地区：[1]华中理工大学电子与信息工程系

出　　处：《华中理工大学学报》1997年第10期93-96,共4页Journal of Huazhong University of Science and Technology

基　　金：国家863计划资助项目

摘　　要：分析了实现ＡＴＭ网中话音通信的各项技术的特点．指出了宽带终端（Ｂ－ＴＥ）实现话音通信应具有的功能．对Ｂ－ＴＥ中适配层的选择、信元打包策略和定时信号的传输方案进行了分析与讨论，建立了Ｂ－ＴＥ话音通信功能模型．讨论了网络互通单元（ＩＷＵ）的信令传输方式，交换虚通道（ＳＶＣ）或永久虚通道（ＰＶＣ）两种ＡＴＭ网连接ＩＷＵ的方案，分析建立了ＩＷＵ的协议模型和功能结构模型．分析表明采用ＰＶＣ可以避免在网络中设置回声抑制器．Transport of voice over asynchronous transfer mode (ATM) network is now an urgent task in ATM technical development. The specific features of various techniques for transport of voice over ATM network are analyzed. The functions for interworking at B TE for voice transport are listed. The selection of adaptation type, the strategy for signal element packing required and the transport scheme of timing signals are discussed. A function model for voice transport at B TE is developed. The transmission mode of signal command in the interworking unit (IWU); and two schemes with either switching virtual channel (SVC) or permanent virtual channel (PVC) are discussed. A protocol model for IWU is also developed. It is shown that with PVC, echo suppressors need not to be used in the network.

关 键 词：异步转移模式 宽带终端 话音通信 通信网 B-ISDN 

分 类 号：TN913.2[电子电信—通信与信息系统]