IP网络QoS问题和对策

QoS Problems and Solutions of IP Network

服务质量(QoS)技术是IP网络技术能否成为未来统一承载网络技术的关键。根据拥塞持续时间,网络QoS风险可以分为微秒级、毫秒级、秒级、分钟级,和更长时间级别等5个等级。调度机制、缓存和队列、呼叫接纳控制、流量工程等技术均是解决一类QoS风险的有效手段。IP网络运营商需要在分析网络中主要风险的基础上制定整体QoS解决方案,在呼损、时延、抖动、丢包4项指标中取得均衡。

Quality of Service （QoS） technology is the key for IP network technology to be the future general bearer network technology. According to the duration of congestion, network QoS risk can be divided into five levels as microsecond class, milliseconds class, second class, minute class, and longer time class. Scheduling mechanism, caching and queue mechanism, call admission control, traffic engineering, and other technologies are all effective means to solve one class of QoS risk. IP network operators need to make total QoS solution analyzing the major risks in their networks, and achieve a balance between four network performances, including call drop rate, delay, jitter, and packet loss.