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Analysis of Enhanced Collision Avoidance Scheme Proposed for IEEE 802.11e-Enhanced Distributed Channel Access Protocol
October 2009 (vol. 8 no. 10)
pp. 1353-1367
ASCII Text
x 
 
Khalim Amjad Meerja, Abdallah Shami, "Analysis of Enhanced Collision Avoidance Scheme Proposed for IEEE 802.11e-Enhanced Distributed Channel Access Protocol," IEEE Transactions on Mobile Computing, vol. 8, no. 10, pp. 1353-1367, October, 2009.
 
 
BibTex
x
 
@article{ 10.1109/TMC.2009.39,
author = {Khalim Amjad Meerja and Abdallah Shami},
title = {Analysis of Enhanced Collision Avoidance Scheme Proposed for IEEE 802.11e-Enhanced Distributed Channel Access Protocol},
journal ={IEEE Transactions on Mobile Computing},
volume = {8},
number = {10},
issn = {1536-1233},
year = {2009},
pages = {1353-1367},
doi = {http://doi.ieeecomputersociety.org/10.1109/TMC.2009.39},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
x 
 
TY - JOUR
JO - IEEE Transactions on Mobile Computing
TI - Analysis of Enhanced Collision Avoidance Scheme Proposed for IEEE 802.11e-Enhanced Distributed Channel Access Protocol
IS - 10
SN - 1536-1233
SP1353
EP1367
EPD - 1353-1367
A1 - Khalim Amjad Meerja,
A1 - Abdallah Shami,
PY - 2009
KW - Wireless LAN
KW - IEEE 802.11e
KW - QoS
KW - EDCA
KW - CSMA/CA
KW - Markov chain
KW - performance analysis.
VL - 8
JA - IEEE Transactions on Mobile Computing
ER -
 
Khalim Amjad Meerja, The University of Western Ontario, London
Abdallah Shami, The University of Western Ontario, London
In enhanced distributed channel access (EDCA) protocol, small contention window (CW) sizes are used for frequent channel access by high-priority traffic (such as voice). But these small CW sizes, which may be suboptimal for a given network scenario, can introduce more packet collisions, and thereby, reduce overall throughput. This paper proposes enhanced collision avoidance (ECA) scheme for AC_VO access category queues present in EDCA protocol. The proposed ECA scheme alleviates intensive collisions between AC_VO queues to improve voice throughput under the same suboptimal yet necessary (small size) CW restrictions. The proposed ECA scheme is studied in detail using Markov chain numerical analysis and simulations carried out in NS-2 network simulator. The performance of ECA scheme is compared with original (legacy) EDCA protocol in both voice and multimedia scenarios. Also mixed scenarios containing legacy EDCA and ECA stations are presented to study their coexistence. Comparisons reveal that ECA scheme improves voice throughput performance without seriously degrading the throughput of other traffic types.

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Index Terms:
Wireless LAN, IEEE 802.11e, QoS, EDCA, CSMA/CA, Markov chain, performance analysis.
Citation:
Khalim Amjad Meerja, Abdallah Shami, "Analysis of Enhanced Collision Avoidance Scheme Proposed for IEEE 802.11e-Enhanced Distributed Channel Access Protocol," IEEE Transactions on Mobile Computing, vol. 8, no. 10, pp. 1353-1367, Oct. 2009, doi:10.1109/TMC.2009.39
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