Real - time Prioritized Call Admission
نویسندگان
چکیده
With the deployment of packetized wireless networks, the need for Quality of Service is becoming increasingly important. In order for QoS to be implemented and eeciently supported, a number of key areas in wired/wireless integration need to be addressed. One key issue is the call admission policy for the base station sched-uler. In this paper we provide a call admission control policy that is designed to make eecient use of the limited wireless channel. This scheme takes advantage of the diverse traac characteristics in order to admit ows based on the requested traac parameters. Simulation results are included to verify the validity of our approach and its importance in future wireless communication. 1 Introduction In the next generation of networks we will begin to see the true convergence of voice, multimedia, and data traac. This merging of various dedicated networks will occur both in the wired and wireless arenas. In order to support such a wide range of traac on a network, the infrastructure must be capable of coping with varying QoS requirements. This support includes both the call admission and the subsequent scheduling of packet transmissions. In this paper we focus on the call admission control policy necessary to provide the QoS guarantees in a base station scheduler. Much work in this area has focused on cellular voice networks with predominantly constant bit-rate voice traac. Very little work has been presented regarding packet networks with very diierent types of traac on a wireless link. The contribution of this paper is the development and analysis of a control policy for admitting ows into a base station scheduler where each ow has diierent traac requirements. In our previous work, we presented a scheduling algorithm designed to t into a broader framework such as in the scheduling multiplexer and QoS sublayer of 1]. This scheduler was shown to provide bounded traac guarantees to multiple classes of traac in 2]. This bound can only be guaranteed so long as a proper call admission algorithm
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