TY - JOUR
T1 - Cross-layer performance analysis for CSMA/CA protocols
T2 - Impact of imperfect sensing
AU - Chong, Jo Woon
AU - Sung, Dan Keun
AU - Sung, Youngchul
N1 - Funding Information:
Manuscript received December 12, 2008; revised April 25, 2009 and July 29, 2009. First published November 17, 2009; current version published March 19, 2010. This work was supported by the Ministry of Knowledge Economy, Korea, under the Information Technology Research Center support program supervised by the Institute of Information Technology Advancement under Grant IITA-2009-C1090-0902-0037 and the IT R&D program of the Ministry of Knowledge Economy/Korea Evaluation Institute of Industrial Technology under Grant 2008-F-004-02, 5G mobile communication systems based on beam division multiple access and relays with group cooperation. The review of this paper was coordinated by Dr. P. Lin.
PY - 2010/3
Y1 - 2010/3
N2 - In this paper, the performance of carrier-sense multiple access (CSMA)/collision-avoidance (CA) protocols in the presence of carrier-sensing errors is analyzed. Two types of carrier-sensing errors, i.e., false alarm and miss-detection, are considered, and their impact on the system performance is analyzed using a new CSMA/CA model based on a Markov chain capturing the sensing error at the physical layer. The system throughput and delay as functions of the sensing error probabilities, as well as other CSMA/CA parameters, are obtained, and their sensitivity with respect to a key physical-layer parameter, i.e., the sensing threshold, is analyzed for commonly used energy detectors or matched filters. It is shown that the throughput and delay sensitivity heavily depends on the ratio of the contention window size W to the frame length L, and the throughput is sensitive to the design of the sensing threshold when the ratio W/L is either small or large. The result provides guidelines about how to operate CSMA/CA considering imperfect sensing at the physical layer.
AB - In this paper, the performance of carrier-sense multiple access (CSMA)/collision-avoidance (CA) protocols in the presence of carrier-sensing errors is analyzed. Two types of carrier-sensing errors, i.e., false alarm and miss-detection, are considered, and their impact on the system performance is analyzed using a new CSMA/CA model based on a Markov chain capturing the sensing error at the physical layer. The system throughput and delay as functions of the sensing error probabilities, as well as other CSMA/CA parameters, are obtained, and their sensitivity with respect to a key physical-layer parameter, i.e., the sensing threshold, is analyzed for commonly used energy detectors or matched filters. It is shown that the throughput and delay sensitivity heavily depends on the ratio of the contention window size W to the frame length L, and the throughput is sensitive to the design of the sensing threshold when the ratio W/L is either small or large. The result provides guidelines about how to operate CSMA/CA considering imperfect sensing at the physical layer.
KW - Carrier-sense multiple access (CSMA)/collision avoidance (CA)
KW - Carrier-sensing errors
KW - Delay
KW - Energy detector
KW - Matched filter
KW - Performance analysis
KW - Sensitivity
KW - Throughput
KW - Wireless local area networks (WLANs)
UR - http://www.scopus.com/inward/record.url?scp=77949751550&partnerID=8YFLogxK
U2 - 10.1109/TVT.2009.2036927
DO - 10.1109/TVT.2009.2036927
M3 - Article
AN - SCOPUS:77949751550
SN - 0018-9545
VL - 59
SP - 1100
EP - 1108
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 3
M1 - 5337994
ER -