摘要
可视电话业务对网络带宽、时延抖动和丢包率都有较高的要求。中国目前的第三代移动通信技术(3G)网络制式使用不同的无线技术,这使得3G网络中可视电话业务在实现的技术方式上也不同。此处主要研究3G网络中基于3G-324M和SIP协议为基础的电路域和分组域可视电话的实现技术,包括控制协议和呼叫流程。同时针对各自不同的实现方式探讨互通的具体形式,在深入分析可视电话互通理论的基础上设计了互通网关的结构,这对于实现不同制式下的可视电话业务互通具有重要的参考价值。
Videotelephone services have much higher requirements for network bandwidth,delay jitter and packet-loss rate.The current 3G networks use different wireless technologies,thus resulting in differences in implementation way of the videotelephone in 3G network.This paper describes the implementation of videophone technology in 3G networks based on 3G-324M and SIP protocol in circuit and packet domain,including control protocols and call flows.Also,for various implementations,the specific interconnection forms are explored.And based on detailed investigations of the videotelephone interworking theory,a gateway structure is designed,this is significant reference value for implementation of interworking videotelephone under different standards.
出处
《通信技术》
2011年第9期71-73,86,共4页
Communications Technology
