UC Santa Cruz

Queue-Sharing Multiple Access (QSMA) is introduced and analyzed. The new channel-access method  consists of establishing  and maintaining a distributed transmission queue among nodes sharing a common channel  and results in   a sequence of queue cycles, with each cycle having one or multiple  queue turns with collision-free transmissions from  nodes that have joined the transmission queue, followed by a joining period for the current cycle.   

Nodes can take advantage of carrier sensing to improve the efficiency with which nodes join and use the shared transmission queue. The throughput of  ALOHA with priority ACK's,  CSMA with priority ACK's,  CSMA/CD with priority ACK's, TDMA with a fixed schedule, and QSMA with and without carrier sensing is compared analytically and by simulation in ns-3.  The results show that QSMA is more efficient  than TDMA with the simplicity of CSMA or ALOHA.