Resource allocation for TD-CDMA wireless multimedia network

Abstract

The traffic in the high-speed wireless multimedia network will be a mixture of voice, video and data messages having a large variety of characteristic and inherent requirement. The present work is a medium access control protocol for time division-code division multiple access system to distribute the available bandwidth among the mixture of different traffic classes depending upon their quality of service requirement. The proposed scheme is the combination of packet scheduling algorithm and packet allocation algorithm. The packet scheduling is based on the packet loss probability and total traffic waiting for transmission in the system. It maximizes the fairness of the system. It also maintains the packet loss probability of all the users in the environment within a limit. The packet scheduling algorithm varies the receive power threshold per packet slot dynamically in case the system packet loss probability and/or system average delay crosses a threshold. The packet allocation is based on the number of packet slot per frame. The performance of the scheme is evaluated in a cellular environment consisting of large number of cells with active users having different multimedia applications. The proposed scheme outperforms existing schemes in terms of delay, throughput and packet loss probability.