Call Admission Control for Real-Time Services in Broadband OFDM Networks

doi:10.13190/jbupt.200705.72.352

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (5): 72-76.doi: 10.13190/jbupt.200705.72.352

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Call Admission Control for Real-Time Services in Broadband OFDM Networks

HU Nan, NIU Kai, HE Zhi-qiang, WU Wei-ling

(School of Information Engineering, Beijing University of Posts and Communications, Beijing 100876, China)

Received:2006-10-26 Revised:2007-03-26 Online:2007-10-30 Published:2007-10-30
Contact: HU Nan

Abstract

Abstract:

A new admission control scheme was presented in packet-switched orthogonal frequency-division multiplexing (OFDM) wireless communications. In the scheme, the relationship between the packet waiting time in queue and the acceptance ratios for real-time services was derived with Markovian queueing model and Wiener prediction theory. Thereafter, the maximum acceptance ratios subject to a hard constraint on packet waiting time and handoff call dropping probability was obtained. The proposed scheme will satisfy the packet-level and call-level quality-of-service (QoS) requirements for real-time services while maintaining high bandwidth utilization. Simulation results verify the effectiveness of the proposed scheme.

Key words: call admission control, orthogonal frequency-division multiplexing, packet delay, quality of service

CLC Number:

TN929.53

HU Nan, NIU Kai, HE Zhi-qiang, WU Wei-ling. Call Admission Control for Real-Time Services in Broadband OFDM Networks[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(5): 72-76.

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Call Admission Control for Real-Time Services in Broadband OFDM Networks

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