Abstract:

Due to the wireless access networks’ characteristics of large delay, small throughput and high packet loss rate, the current active queue management (AQM) is not applicable to the wiredcumwireless network. This paper analyzes the price production mechanism of Random Exponential Marking (REM) and points out its shortcomings. By improving the price with queuebuffer proportion, a new pricebased congestion control mechanism (PREM) is proposed. PREM uses queuebuffer proportion and virtual capacity as congestion measures. Finally, the proposed algorithm is validated on the NS2 simulation platform and compared with REM, PI and ProxyRED.It is proved that PREM can reduce the packet loss effectively.

Key words: wireless access network;congestion control;active queue management;queuebuffer proportion;virtual capacity