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Call Admission Control Scheme With Multimedia Scheduling Service in WiMAX Networks
Zhiwei Yan, Guizhong Liu, Rui Su
Pages - 1 - 16     |    Revised - 15-07-2012     |    Published - 10-08-2012
Volume - 3   Issue - 1    |    Publication Date - July / August 2012  Table of Contents
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KEYWORDS
Call Admission Control, QoS Level, Multimedia, Wireless Network
ABSTRACT
WiMAX network introduces a multimedia data scheduling service with different quality of service (QoS) requirements. Transmission opportunities are scheduled by the service according to the types of traffic data for the different connections or users. In the paper, we first propose a uniform definition of QoS level for the multimedia data types in the service. The QoS level of a connection are determined by the type of data of the connection and its allocated resources. Based on these QoS levels, we propose a call admission control (CAC) scheme for the entry admission of a new connection without degrading the network performance and the QoS of ongoing connections. The key idea of this scheme is to regulate the arriving traffic of the network such that the network can work at an optimal point, given under a heavy load traffic. Taking advantage of the simulation experiments, we confirm the fact that the proposed scheme can achieve better trade-off between the overall performance of network system and the QoS level of individual connection.
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Mr. Zhiwei Yan
- China
zhiweiyan@ mailst.xjtu.edu.cn
Mr. Guizhong Liu
- China
Mr. Rui Su
- China