Performance analysis of CSMA and RI-BTMA in an ad hoc network

The paper considers the performance analysis of two protocols, carrier sensing multiple access (CSMA) and receiver initiated busy tone multiple access (RI-BTMA) in a distributed wireless ad-hoc network. Carrier sensing and busy tone schemes are used to reduce interference and resolve collisions between randomly distributed nodes. The packet arrival and transmission process is modeled as a regenerative Markov random process. The probability of correct packet detection depends on the SINR of the received packet. The SINR of the packet, the signal received during channel sensing by transmitter nodes in the CSMA protocol, and the busy tone signal magnitude at transmitter nodes using the RI-BTMA protocol are modeled as a random variable whose cumulative distribution function is derived. The throughput of the two systems for fixed outage probability is analytically derived. Analytical results are verified using discrete time step simulation.