Effectiveness Analysis of Physical Carrier-sensing in IEEE 802.11 Wireless Networks

[[abstract]]Abstract: Physical carrier-sensing mechanism has been used as an effective way to alleviate interference in wireless networks, but it also constrains spatial reuse. The aggregate throughput in wireless ad hoc networks is a tradeoff between spatial reuse and interference avoidance. The influence of physical carrier-sensing on the aggregate network throughput has attracted several studies. Previous work investigated the interference with the packet reception at receivers and proposed the optimal carrier-sensing range to achieve the maximum aggregate throughput. However, the interference with the sender’s reception of the receiver’s acknowledgement (ACK) has been ignored. In this paper, we consider the influence of interference at both senders and receivers on the aggregate throughput in wireless ad hoc networks. We propose a spatiotemporal model that describes the effectiveness of the physical carrier-sensing mechanism.[[conferencetype]]國內[[conferencedate]]20120601~2012060