Enhanced spread spectrum ALOHA system level performance assessment

摘要

This paper describes the simulated system performances of the enhanced spread spectrum ALOHA (E-SSA) random access scheme in a realistic mobile satellite multibeam scenario operating in S-band. The E-SSA random access scheme has been selected for supporting messaging services in the ETSI S-band Mobile Interactive Multimedia (S-MIM) standard. Finally, the operation and the performance of E-SSA is elaborated in the context of a terrestrial gap-filler component complementing the satellite coverage in densely populated areas. It is shown that the terrestrial network is able to off-load traffic from the satellite component while ensuring continuity of service in areas that cannot be covered by a satellite only system.