改进型卫星CFDAMA MAC协议时延性能分析  

Delay Performance of the Improved CFDAMA MAC Protocol via Satellite

作　　者：周熙[1] 贾世楼[2] 佘阳[3] 

机构地区：[1]重庆通信学院网络与嵌入式系统实验室,重庆400035 [2]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001 [3]重庆通信学院地方生管理部教务处,重庆400035

出　　处：《南京理工大学学报》2005年第1期77-80,共4页Journal of Nanjing University of Science and Technology

摘　　要：该文比较了采用不同预约方式的宽带GEO卫星网络混合式按需 /自由分配协议,提出了采用混合式轮询 /捎带预约方式的CFDAMA- RPR协议。采用IFP信源进行计算机仿真,对CFDAMA- RPR、CFDAMA -RR(采用轮询预约方式 )和CFDAMA PB(采用捎带预约方式 )协议的时延性能进行了比较。仿真结果说明,CFDAMA- RPR协议具有更好的时延 /吞吐量性能。This paper examines the relative performances of the Combined Free/Demand Assignment Multiple Access (CFDAMA) protocol with different terminal request strategies. A new satellite multiple access scheme employing combined Round Robin/Piggybacking Request strategy (CFDAMA-RPR) is proposed, which is compared with CFDAMA-RR (employing Round Robin request strategy) and CFDAMA-PB (employing Piggy-Backing request strategy). The delay performances between CFDAMA-RPR, CFDAMA-RR and CFDAMA-PB scheme were compared by computer simulation. Simulations were carried out by Interrupted Fluid Process (IFP) traffic. The results demonstrate that compared with CFDAMA-PB and CFDAMA-RR protocol, CFDAMA-RPR scheme can offer better delay/throughput performance of the satellite channel.

关 键 词：GEO卫星 MAC协议 CFDAMA协议 ON—OFF信源 

分 类 号：TN92[电子电信—通信与信息系统]