Title :
On-demand access for next generation NASA missions
Author :
Lin, Lin ; Hadjitheodosiou, Michael
Author_Institution :
Center for Satellite & Hybrid Commun. Networks, Maryland Univ., College Park, MD, USA
Abstract :
We discuss medium access control (MAC) issues related to the migration to the next generation on-demand mode for communication support of NASA missions in near Earth orbits. For this scenario, to meet the objective of bandwidth-efficient support while guaranteeing specific QoS requirements, a detailed investigation of the suitability of the MAC schemes is performed. Performance measures of interest include end-to-end delay and successful throughput. A reservation-based demand time division multiple access (RD-TDMA) protocol is proposed and its performance is analyzed. Using simulation, we compare the system´s performance under this scheme with that obtained under a fixed-assignment scheme. Simulation results demonstrate that on-demand mode is a suitable strategy for future NASA space missions with an unpredictable traffic pattern, and can offer certain performance advantages.
Keywords :
quality of service; satellite communication; telecommunication traffic; time division multiple access; MAC; QoS requirements; end-to-end delay; medium access control; near Earth orbits; next generation NASA missions; reservation-based demand TDMA protocol; reservation-based demand time division multiple access protocol; throughput; unpredictable traffic pattern; Access protocols; Delay; Earth; Extraterrestrial measurements; Media Access Protocol; NASA; Orbits; Performance analysis; Throughput; Time division multiple access;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.997390
