PACKET ADMISSION CONTROL IN A DIRECT-SEQUENCE SPREAD-SPECTRUM LEO SATELLITE-COMMUNICATIONS NETWORK

The effect of multiple-access interference on throughput performance o f a direct-sequence spread-spectrum low-earth-orbiting satellite commu nications network is discussed in this paper. To recognize the effect of interferences when their sources are either inside or outside the s ervice area of a satellite, we develop a stochastic model for the loca tion of users, We will show that the effect of interference on the per formance degradation from the users with large propagation distance to their connecting satellites is a dominant factor, Hence, to improve t he performance of the system, we propose a method in which the transmi ssions of packets are controlled according to their distances to conne cting satellites as well as traffic distribution.