DocumentCode :
1625915
Title :
Capacity Planning for Voice/Data Traffic in IEEE 802.11e Based Wireless LANs
Author :
Wu, Yiqun ; Zhu, Yanfeng ; Niu, Zhisheng ; Zhu, Jing
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
fYear :
2008
Firstpage :
3247
Lastpage :
3252
Abstract :
In this paper, we concentrate on IEEE 802.11e based WLANs with mixed Voice-over-IP (VoIP) and data services. Although the enhanced distributed coordination access mechanism of IEEE 802.11e can differentiate VoIP and data services, the unsaturated feature of VoIP traffic and the unbalance between downlink and uplink degrade the capacity for VoIP seriously. To address these issue, we propose a queueing system based analytical model to investigate the contention between unsaturated voice traffic and saturated data traffic. Moreover, our queueing analysis indicates that the bottleneck of increasing the capacity for VoIP is the downlink. Based on the capacity analysis, we propose an admission control mechanism to guarantee the Quality-of-Service of admitted VoIP sessions. Extensive simulation results are given to illuminate the efficiency of the proposed scheme.
Keywords :
Internet telephony; quality of service; queueing theory; telecommunication congestion control; telecommunication traffic; wireless LAN; IEEE 802.11 based wireless LAN; VoIP; admission control mechanism; capacity planning; data services; mixed voice-over-IP services; quality of service; queueing analysis; queueing system based analytical model; voice-data traffic; Admission control; Analytical models; Capacity planning; Degradation; Downlink; Internet telephony; Quality of service; Queueing analysis; Traffic control; Wireless LAN;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2075-9
Electronic_ISBN :
978-1-4244-2075-9
Type :
conf
DOI :
10.1109/ICC.2008.611
Filename :
4533647
Link To Document :
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