采用预测算法的卫星CFDAMA MAC协议时延性能分析  

Performance Analysis of CFDAMA Protocol via Satellite with Predictive Algorithm

作　　者：周熙[1] 王柱京[1] 佘阳[1] 

机构地区：[1]重庆通信学院,重庆400035

出　　处：《电讯技术》2006年第5期58-62,共5页Telecommunication Engineering

基　　金：重庆市自然科学基金资助项目(CSTC;2005BB2209)

摘　　要：提出了地面站采用预测预约算法的混合式按需/自由分配-预测预约(CFDAMA-PR)卫星媒体接入控制协议。CFDAMA-PR协议可采用预定预约时隙或轮询预约时隙发送预约请求。在文中,通过计算机仿真对预定时隙预约CFDAMA-PR、CFDAMA-PA与基本DAMA协议进行性能比较,同时还对轮询预约CFDAMA-PR和CFDAMA-RR协议进行了仿真性能比较,仿真中采用IFP突发信源,仿真结果说明CFDAMA-PR协议采用预测预约算法,实现了更好的时延/吞吐量性能。The novel satellite multiple access protocol called Combined Free/Demand Assignment Multiple Access- Predictive Request （CFDAMA- PR） is proposed in this paper. CFDAMA- PR can make slot reservation by pre - assigned request slots or round robin request slots. The delay performance between CFDAMA - PR with pre - assigned request, CFDAMA - PA and pure DAMA protocol is compared by computer simulation. Then, the delay performance between CFDAMA - PR with round robin request and CFDAMA -RR protocol is also compared by computer simulation. Simulations are performed with the Interrupted Fluid Process （IFP） traffic. Simulation results demonstrate that CFDAMA - PR achieves a better delay/throughput performance.

关 键 词：宽带卫星网络 媒体接入控制协议 CFDAMA-PR协议 IFP信源 

分 类 号：TN919.2[电子电信—通信与信息系统]