Priority-based random access scheme for S-PCN

A novel random multiple access technique, priority-based fast access (PBFA), is proposed by the authors to reduce the access delay of delay-sensitive random access (RA) packets in S-PCNs. The approach, based on the concept of good channel transmission (GCT), can significantly improve the delay performance, in particular, for those delay-sensitive packets, of a slotted ALOHA (S-ALOHA) random access channel (RACH) in a satellite fading environment. In addition, the time capture effect is exploited to further improve the RACH performance