A Simple Critical-Load-Based CAC Scheme for IEEE 802.11 DCF Networks
Qinglin Zhao, Danny HK Tsang, Taka Sakurai
IEEE-ACM TRANSACTIONS ON NETWORKING | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2011
This paper proposes a simple and practical call admission control (CAC) scheme for one-hop IEEE 802.11 distributed coordination function (DCF) networks in heterogeneous environments. The proposed scheme is the first CAC scheme derived from an asymptotic analysis of the critical traffic load, where the critical traffic load represents the threshold for queue stability. The salient feature of our CAC scheme is that it can be performed quickly and easily without the need for network performance measurements and complex calculations. Using the proposed scheme, we specifically investigate the voice capacity of 802.11 DCF networks with unbalanced traffic. Extensive simulations covering both ad hoc..View full abstract
Awarded by RGC
Manuscript received June 13, 2009; revised June 02, 2010 and January 24, 2011; accepted February 07, 2011; approved by IEEE/ACM TRANSACTIONS ON NETWORKING K. Kar. Date of publication March 10, 2011; date of current version October 14, 2011. This work was supported by the RGC under the Earmarked Research Grant HKUST 6160/04E.