关键词: 无线网络, 载波侦听, 信道速率, 发射功率

Abstract:

The existing wireless network standards provide multiple channel rates for data transmission.However,the multi-rate adjustment mechanism does not take into consideration the impact of the physical carrier sense range.This paper analyzes the interference model and spatial reuse of wireless networks and proposes an adaptive power and rate algorithm（PRA） that indirectly adjusts the physical carrier sense range by tuning the transmission power.In PRA,an appropriate channel rate is estimated according to the distance between communication node pairs,which helps to adaptively achieve high channel rate and suitable transmission power.Simulated results show that the proposed algorithm effectively improves the network throughout and the fairness,and reduces the power consumption.

Key words: wireless networks, carrier sense, channel rate, transmission power