Modeling single-hop wireless networks under Rician fading channels

An analytical model for single-hop ad hoc networks is introduced that considers the impact of the physical layer on the operation and performance of saturated IEEE 802.11. Using the bottom-up approach, aspects of the physical layer are explicitly incorporated in the dynamics of the events governing the operation of the IEEE 802.11 binary exponential backoff algorithm leading to a more realistic computation of the node´s average service time and throughput. We study the impact of frequency-nonselective slowly time-variant Rician fading channels on the performance of single-hop ad hoc networks using the IEEE 802.11 distributed coordination function in saturation. We validate our model through simulations and study of the throughput performance of the four-way handshake mechanism under direct sequence spread spectrum (DSSS) with differential binary phase shift keying (DBPSK) modulation.