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Call Admission Control based on adaptive bandwidth allocation for multi-class services in wireless networks

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3 Author(s)
Chowdhury, M.Z. ; Dept. of Electron. Eng., Kookmin Univ., Seoul, South Korea ; Yeong Min Jang ; Haas, Z.J.

Due to the fact that Quality of Service (QoS) requirements are not as stringent for non-real-time traffic types, as opposed to real-time traffic, more calls can be accommodated by releasing some bandwidth from the existing non-real-time traffic calls. If the released bandwidth to accept a handover call is larger than to accept a new call, then the probability of dropping a call is smaller than the probability of blocking a call. In this paper we propose an efficient Call Admission Control (CAC) that relies on adaptive multi-level bandwidth-allocation scheme for non-real-time calls. The features of the scheme allow reduction of the call dropping probability along with the increase of the bandwidth utilization. The numerical results show that the proposed scheme is able to attain negligible handover call dropping probability without sacrificing bandwidth utilization.

Published in:

Information and Communication Technology Convergence (ICTC), 2010 International Conference on

Date of Conference:

17-19 Nov. 2010

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