A Distributed Procedure for Carrier Sensing Threshold Adaptation in CSMA-Based Mobile Ad Hoc Networks

This paper discusses the problem of determining the carrier sense threshold (CSth) of nodes in a CSMA-based Mobile Ad Hoc Network (MANET) and proposes a practical, fully distributed, CSth adaptation procedure. The procedure enables a node to select its CSth in order to improve the data throughput of the system by maximizing the number of successful transmissions in its neighborhood. Simulation results show that the procedure is able to improve the data throughput in more than 85% of random topologies. The average throughput improvement over all topologies were 11% and 18% in two different scenarios, with some topologies showing up to 75% data throughput gains.

[1]  David M. Nicol,et al.  Simulation Modeling of Large-Scale Ad-hoc Sensor Networks , 2001 .

[2]  Jing Zhu,et al.  Leveraging spatial reuse in 802.11 mesh networks with enhanced physical carrier sensing , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[3]  Nitin H. Vaidya,et al.  On physical carrier sensing in wireless ad hoc networks , 2005, Proceedings IEEE 24th Annual Joint Conference of the IEEE Computer and Communications Societies..