Title :
Channel efficiency-based transmission rate control for congestion avoidance in wireless ad hoc networks
Author :
Zhang, Xinming ; Lv, Jun ; Han, Xiaojun ; Sung, Dan Keun
Author_Institution :
Sch. of Comput. Sci. & Technol., Univ. of Sci. & Technol. of China (USTC), Hefei, China
Abstract :
If the transmission rate of transmission control protocol (TCP) does not match that of the medium access control (MAC) protocol in wireless ad hoc networks, it causes network congestion and network performance degradation. This letter proposes a new mechanism to feed back the real channel efficiency of MAC protocol to TCP. Comparing the real channel efficiency in MAC protocol with the virtual channel efficiency in TCP, we can adaptively control the transmission rate in TCP by using the congestion window and the flow of TCP ACKs, in order to alleviate the load of MAC protocol before a congestion event occurs and to enhance the network performance. Simulation results show that the proposed mechanism outperforms 802.11 DCF in terms of throughput and delay.
Keywords :
access protocols; ad hoc networks; telecommunication congestion control; telecommunication standards; transport protocols; wireless channels; 802.11 DCF; MAC protocol; TCP ACK; channel efficiency-based transmission rate control; congestion avoidance; congestion event; congestion window; medium access control protocol; network congestion; network performance degradation; transmission control protocol; virtual channel efficiency; wireless ad hoc networks; Access protocols; Analytical models; Degradation; Delay; Feeds; Media Access Protocol; Mobile ad hoc networks; Multiaccess communication; Throughput; Wireless application protocol; Ad hoc networks, channel efficiency, congestion avoidance, cross-layer, IEEE 802.11, MAC, rate control;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.090861
