摘要
由于网络传输过程中部分数据包的丢失或错误 ,终端用户一旦遇到这种情况 ,在服务结束后会重新提出服务请求 .不同于传统的先进先出服务规则 ,提出了反馈优先的服务策略 .通过构造拟生灭过程 ,对网络流中的反馈优先策略的排队进行了分析 .运用谱展开方法得到了它的平稳队长分布 ,进而求解了两种不同反馈策略排队的时延指标 ,并证明了反馈优先的服务策略能提高服务质量 .
Once the transmission error or lost data packets occurred in network flows,the terminal user might bring forward a new service requirement.Different with the traditional FCFS discipline,the strategy of feedback priority was proposed.The queue with this policy was analyzed by constructing a quasi birth-and-death process.Based on the spectral expansion method,the stationary distribution of queue length was obtained.Furthermore,the delay performances of the two queues with different feedback strategies were calculated,indicating that the strategy with feedback priority can improve the quality of service.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第5期807-809,共3页
Acta Electronica Sinica
基金
国家自然科学基金 (No .70 1 71 0 59)
关键词
网络流
服务质量
反馈策略
拟生灭过程
谱展开方法
network traffic
quality of service
feedback strategy
quasi birth-and-death process
spectral expansion method
