Abstract: This paper analyzes the delay distribution of link and proves it deriving from the Wei Bull theory: the probability of short delay after the parallel-link is larger than any separate way, and the probability of long delay is smaller than any separate way. A special multi-path transmission program is put forward to copy 20% of voice information and transport it independently. After testing by the NS2 simulation, it shows that end-to-end delay and packet loss rate is obviously improved by increasing 20% of bandwidth.

Key words: Multi-Path Packet Redundancy Strategy(MPRS), QoS, VoIP, Wei Bull model

摘要： 分析链路的延时分布特性，根据威布尔变换理论证明，得出链路并联后短时延发生的概率比任何单独一路都大、长时延发生的概率比任何单独一路都小的结论。提出一种特殊的多路径传输方案，将语音中20%的信息复制独立传输，该技术经NS2仿真测试表明，在增加20%的带宽下改善了端到端时延分布和丢包率的降低。

关键词: 多路径包备份策略, 服务质量, 语音网关, 威布尔模型

CLC Number: 

• TN915