Measurement-based Call Admission Control algorithm for multi-rate VoWLANs

We design a Call Admission Control (CAC) algorithm for voice over multi-rate Wireless Local Area Networks (WLAN) that guarantees a satisfactory quality level of performance for the voice call sessions admitted into the WLAN while allowing the maximum utilization of the available resources. Our measurement-based CAC algorithm quantifies the resources consumed by current call sessions and utilizes their historical behavior to account for potential rate changes and make an educated admission control decision. Eventually, we evaluate the effectiveness of the proposed solution using the network simulator (ns-3) and we end up with a CAC algorithm capable of guaranteeing a satisfactory level of Quality of Service (QoS), regardless of the presence of rate adaptation algorithms, while keeping an efficient use of the network resources.

[1]  Toshikazu Kodama,et al.  Voice capacity of IEEE 802.11b, 802.11a and 802.11g wireless LANs , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[2]  Josep Mangues-Bafalluy,et al.  Distributed Call Admission Control for VoIP over 802.11 WLANs Based on Channel Load Estimation , 2010, 2010 IEEE International Conference on Communications.

[3]  Sachin Garg,et al.  Admission control for VoIP traffic in IEEE 802.11 networks , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[4]  Sunghyun Choi,et al.  Supporting VoIP Services in IEEE 802.11e WLANs , 2009, QSHINE.

[5]  Fouad A. Tobagi,et al.  Capacity of an IEEE 802.11b wireless LAN supporting VoIP , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[6]  Sunghyun Choi,et al.  Two-level protection and guarantee for multimedia traffic in IEEE 802.11e distributed WLANs , 2009, Wirel. Networks.

[7]  Yang Xiao,et al.  Voice capacity analysis of WLAN with unbalanced traffic , 2006, IEEE Transactions on Vehicular Technology.