Approximate analysis of ACRDA MAC protocol with decollision algorithm for satellite uplink access

The Asynchronous Contention Resolution Diversity Aloha with Decollision Algorithm (ACRDA-DA) medium access control (MAC) protocol for satellite uplink access is proposed in this paper. The same two or multiple replica packets from a user are transmitted in two or multiple random non-overlapping virtual slots in a virtual frame. A decollision algorithm is used to decollide up to a maximum number of packets. The major contributions of this paper are the proposed MAC protocol and its approximate performance analysis as well as a closed-form analysis for the original ACRDA MAC protocol at the MAC layer. The throughputs and the maximum normalized throughputs for the two MAC protocols are investigated and compared with the basic asynchronous Pure Aloha MAC protocol. Numerical results show that the proposed ACRDA-DA MAC protocols can outperform the basic ACRDA MAC protocol by about eleven times in terms of the maximum normalized throughput.