VOIP业务以及相关QoS性能的网络优化研究

Performance and Optimization of QoS for VOIP Service

简要介绍了VOIP传输的基本原理、传输机制,以及对影响VOIP业务QoS性能的3个主要因素 (时延、抖动和丢包率)进行分析,提出了利用MPLS、diffserv-aware TE(流量工程)集成模型进行端到端QoS 性能优化的方法和解决办法。MPLS、diffserv-aware TE能够感知CoS(服务等级),并提供根据CoS细粒度来预留带宽资源,在每个CoS级别提供MPLS容错的机制,能够为VOIP提供低丢失、低延迟、低抖动以及确定的带宽服务,很好地满足服务质量的要求．

The principle of over internet protocol（VOIP） is described. The three main factors which affected the quality of service for VOIP are analyzed. Finally an int, egrated module over MPLS , diffserv-aware TE which can give strict end-to-end quality of service guarantees is presented. MPLS diffserv TE makes MPLS, TE aware of CoS, allows resources reservation with CoS granularity and provides the fault-tolerance properties of MPLS at a CoS level, which can assure VOIP service bandwidth of lower loss, lower latency and lower jitter so as to satisfy the requirement of QoS.