Title :
A stochastic model for optimizing physical carrier sensing and spatial reuse in wireless ad hoc networks
Author :
Ma, Hui ; AlAzemi, Hamed M K ; Roy, Sumit
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA
Abstract :
The choice of physical carrier sensing (PCS) threshold is key to the trade-off between the amount of spatial reuse and probability of packet collisions in a wireless ad hoc network. In this paper, we present a new analytical approach for optimizing the PCS threshold as measured by probability of packet collisions and the aggregate one-hop throughput. Our model simultaneously incorporates the impact of PCS threshold and the backoff mechanism via a suitable Markov chain model for saturation (i.e. all nodes always have a packet to send in their queues). Elaborate OPNET simulation results show the effectiveness of the analytical model
Keywords :
Markov processes; ad hoc networks; Markov chain model; one-hop throughput; packet collision probability; physical carrier sensing optimization; spatial reuse; stochastic model; wireless ad hoc networks; Ad hoc networks; Aggregates; Analytical models; Intelligent networks; Interference; Mobile ad hoc networks; Network topology; Personal communication networks; Stochastic processes; Throughput;
Conference_Titel :
Mobile Adhoc and Sensor Systems Conference, 2005. IEEE International Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-9465-8
DOI :
10.1109/MAHSS.2005.1542851
