Achieving maximal VoIP calls in 802.11 wireless networks

Authors:
Jung-Shian Li;Hung-Cheng Kao;Wu-Han Lin
Affiliations:
Department of Electrical Engineering, Institute of Computer and Communication Engineering, National Cheng Kung University, University Road, Tainan 701, Taiwan, ROC;Department of Electrical Engineering, Institute of Computer and Communication Engineering, National Cheng Kung University, University Road, Tainan 701, Taiwan, ROC;Department of Electrical Engineering, Institute of Computer and Communication Engineering, National Cheng Kung University, University Road, Tainan 701, Taiwan, ROC
Venue:
Computer Communications
Year:
2010

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Abstract

IEEE 802.11b WLAN deployments have mushroomed in recent years. However, the original 802.11 MAC layer can not meet the requirements of modern wireless multimedia applications. Accordingly, the IEEE 802.15.3 standard has been proposed to increase the data rate in wireless multimedia applications whilst simultaneously reducing the cost and power consumption of the portable devices within the network. In this study, the 802.15.3 MAC protocol is implemented over an 802.11 WLAN. In implementing the 802.15.3 superframes, the timing functions are accomplished using high-resolution timers such that the traditional CSMA/CA protocol can be retained. It is shown that the emulated 802.15.3 MAC layer is capable of supporting 12 full-duplex voice calls or 24 half-duplex voice calls, which is consistent with the theoretical VoIP capacity of 802.11b WLANs.