On Optimal Physical Carrier Sensing: Theoretical Analysis and Protocol Design

— Traditional Physical Carrier Sensing (PCS), which aims at eliminating hidden terminals in wireless networks, causes too many exposed terminals and deteriorates the throughput per user seriously. Some existing work has proven that an aggressive PCS can improve the throughput by balancing the tradeoff between hidden terminals and exposed terminals. However, little work has been conducted to optimize the PCS according to the network conditions. In this paper, we develop an analytical model to study the behaviors of a user in the aggressive PCS scenario, with which the optimal PCS threshold can be derived. Then, to avoid the complicated computation, we present a heuristic algorithm, in which the parameters required for PCS tuning are estimated by the carrier sensing mechanism employed

• Type: Conference
• Year: 2007
• Where: INFOCOM
• Authors: Yanfeng Zhu, Qian Zhang, Zhisheng Niu, Jing Zhu
• Keywords: Aggressive Pcs, Communications, Hidden Terminals, INFOCOM 2007, Traditional Physical Carrier