An Optimized Multiple Access Control Protocol for a little LEO Satellite Store-and-Forward Global Data Network
The reservation method used in a TD-SRMA protocol determines the protocols efficiency. The typical reservation methods proposed are SALOHA and VCR-SALOHA (Varying Calling Rate SALOHA).SALOHA is relatively simple to realize but it can not adapt well to the dynamic traffic pattern in a little LEO satellite network. VCR-SAOHA can better adapt the dynamic traffic,but its highest efficiency on average is still 0.38. To improve the reservation efficiency, a new reservation method, AP-SALOHA (Adaptive Polling and SALOHA), is proposed. In AP-SALOHA, polling is used for the stations which have high probability to upload a message, and SALOHA is used for the stations which have low probability to upload messages. Different from SALOHA and VCR-SALOHA, the length of a reservation period in AP-SALOHA varies according to the network traffic.Analysis and simulation show that AP-SALOHA provides better throughput performance. About 19％ improvement over VCR-SALOHA can be achieved.
Multiple Access Protocol LEO Satellite
Baozhong Cheng Jeff Ward Marting Sweeting
School of Electronics and Information Engineering Northern Jiaotong University, Beijing, 100044, China Surrey Space Center, University of Surrey, Surrey, GU2 7XH, UK
国际会议
成都
英文
413-415
2003-08-27（万方平台首次上网日期，不代表论文的发表时间）