Name
Title | ||
|---|---|---|
Optimal physical carrier sensing to defend against exposed terminal problem in wireless ad hoc networks |
Abstract | ||
|---|---|---|
Physical carrier sensing (PCS) is an effective mechanism to reduce the collision and interference caused by hidden terminals in wireless ad hoc networks, which allows nodes to be separated by a silent margin. However, potential simultaneous transmissions may be suppressed in this silent margin due to exposed terminal problem. As a consequence, PCS mechanism affects the network performance in two opposite ways. In this paper, we present an analytical model for deriving the optimal carrier sensing threshold to make a tradeoff between hidden terminal and exposed terminal problems for given network topology. Our model takes into account the potential throughput loss of exposed terminals, which previous studies have ignored. Based on the model, an adaptive and iterative algorithm is proposed to obtain the optimal sensing threshold and dynamically adjust the physical carrier sensing threshold through periodic estimation of channel condition. Simulation results demonstrate that the proposed scheme outperforms IEEE 802.11 protocol in terms of average network throughput. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ICCCN.2014.6911878 | ICCCN |
Keywords | Field | DocType |
ieee 802.11 protocol,simultaneous transmissions suppression,radiofrequency interference,network performance,collision reduction,optimal physical carrier sensing,channel estimation condition,hidden terminal problem,adaptive algorithm,network topology,pcs,telecommunication network topology,analytical model,wireless ad hoc networks,optimal sensing threshold,iterative algorithm,periodic estimation,nodes separation,exposed terminals throughput loss,ad hoc networks,interference reduction,silent margin,iterative methods,channel estimation | Mobile ad hoc network,Multiple Access with Collision Avoidance for Wireless,Exposed node problem,Computer science,Computer network,Ad hoc wireless distribution service,Optimized Link State Routing Protocol,Wireless ad hoc network,Distributed computing | Conference |
Citations | PageRank | References |
3 | 0.38 | 11 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Xin Ming Zhang | 1 | 171 | 23.29 |
| Haitao Zhu | 2 | 3 | 0.71 |
| Guoqing Qiu | 3 | 3 | 0.38 |