TY - JOUR
T1 - Performance evaluation for next generation differentiated services in wireless local area networks
AU - Kuo, Yu Liang
AU - Wu, Eric Hsiao Kuang
AU - Chen, Gen Huey
N1 - Funding Information:
Accepted May 31, 1994. Drs. Miller, Piacentini, Klein, and Ms. Samoilov are with the College of Physiciansand StllgeonsofColumbia Universityand New YorkState Psychiatric 1nstitute. Drs. Abikoffand Shah are with Schneider Children 5 Hospital, Long Island jewish Medical Center. Ms. Guardino is with Freedom from Fear, Staten lsiand. NY. lin's research W(/5 supported ill flirt by ,hi' Barbnra JOIl(/S Center fOr tin' Study and Treatment ofChildren at Risk, the Lowenstein Centerfor the Study and Prevention ofDisruptive Disorders, and NIMH grant MH35779 to Dr. Klein. The authorsgratefidly acknowledgethe assistance ofDonald Klein, jacob Cohen, and Mark Davies in the preparation ofthis manuscript. Reprint requests to Dr. Miller, Department ofChild Psychiatry, Columbia University College of Physicians and Surgeons/New York State Psychiatric Institute, 722 West 168th Street, Unit 60, New York, NY 10032. 0890-8567/95/3403-0359$03.00/0© 1995 by the American Academy of Child and Adolescent Psychiatry.
PY - 2008/1
Y1 - 2008/1
N2 - With the provisioning of high-speed wireless LAN (WLAN) environments, multimedia services (e.g., VolP and video-conference) with different QoS requirements will be available in next generation WLANs. Multimedia services could be categorized into multiple traffic classes and different priorities will be applied to access the wireless medium. The IEEE 802.11 working group has been developing a new generation distributed access protocol, called enhanced distributed channel access (EDCA), to support service differentiation in the 802.11 MAC layer. Service differentiation is achieved by assigning different values of EDCA access parameters (i.e., minimum contention window, maximum contention window, and arbitration interframe space) to different traffic classes. To investigate the system performance under various network conditions, it is helpful to have a theoretical model for EDCA. In this paper, we introduce an analytical model for EDCA so that the saturation bandwidth can be estimated by closed-form formulas for each traffic class. We use ns-2 simulator to validate the analytical model. Some numerical results are provided to evaluate the performance of EDCA. The numerical results demonstrate the corresponding effects for tuning different EDCA access parameters.
AB - With the provisioning of high-speed wireless LAN (WLAN) environments, multimedia services (e.g., VolP and video-conference) with different QoS requirements will be available in next generation WLANs. Multimedia services could be categorized into multiple traffic classes and different priorities will be applied to access the wireless medium. The IEEE 802.11 working group has been developing a new generation distributed access protocol, called enhanced distributed channel access (EDCA), to support service differentiation in the 802.11 MAC layer. Service differentiation is achieved by assigning different values of EDCA access parameters (i.e., minimum contention window, maximum contention window, and arbitration interframe space) to different traffic classes. To investigate the system performance under various network conditions, it is helpful to have a theoretical model for EDCA. In this paper, we introduce an analytical model for EDCA so that the saturation bandwidth can be estimated by closed-form formulas for each traffic class. We use ns-2 simulator to validate the analytical model. Some numerical results are provided to evaluate the performance of EDCA. The numerical results demonstrate the corresponding effects for tuning different EDCA access parameters.
KW - Analytical model
KW - IEEE 802.11
KW - Medium access control
KW - Performance evaluation
KW - Wireless local area networks
UR - http://www.scopus.com/inward/record.url?scp=38949193908&partnerID=8YFLogxK
M3 - 期刊論文
AN - SCOPUS:38949193908
SN - 1016-2364
VL - 24
SP - 203
EP - 220
JO - Journal of Information Science and Engineering
JF - Journal of Information Science and Engineering
IS - 1
ER -