Title :
EDCA/CA: Enhancement of IEEE 802.11e EDCA by Contention Adaption for Energy Efficiency
Author :
Chen, Jyh-Cheng ; Cheng, Kai-Wen
Author_Institution :
Dept. of Comput. Sci., Nat. Tsing Hua Univ., Hsinchu
fDate :
8/1/2008 12:00:00 AM
Abstract :
This paper presents a contention adaptation (CA) mechanism to improve the energy efficiency in IEEE 802.11e EDCA. By suspending some transmissions, the proposed EDCA/CA can reduce the number of collisions. Because unnecessary retransmissions are eliminated, the energy consumption is reduced. Extensive simulations have been performed to demonstrate the performance of the proposed EDCA/CA. The results show that EDCA/CA can reduce the energy consumption significantly. It reduces frame delay as well when traffic load is heavy. When traffic load is light, the proposed EDCA/CA will slightly increase the video delay, which in general is still acceptable. Furthermore, the proposed EDCA/CA is simple and easy to implement. It is fully compatible with the 802.11e EDCA. It is both effective and practical.
Keywords :
access protocols; telecommunication congestion control; wireless LAN; IEEE 802.11e EDCA; MAC protocols; collision aviodance; contention adaptation; energy efficiency; enhanced distributed channel access; Computer science; Delay; Energy consumption; Energy efficiency; Multiaccess communication; Quality of service; Road accidents; Telecommunication traffic; Traffic control; Wireless LAN; IEEE 802.11e EDCA; QoS; energy efficiency; multiple access protocol; wireless LANs;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2008.070168