Abstract
In the past decade, the market for wireless mobile communications has been growing at a rapid pace. A future wireless mobile network is desired to support integrated services, including voice, data, video, etc. A well-designed multiple access control (MAC) protocol is crucial in supplying a satisfactory level of performance, such as delay or throughput. A dynamic code assignment in hybrid multi-code CDMA/TDMA is proposed in this paper. The code assignment scheme is designed to follow the time-varying traffic characteristics of mobile users. The base station (BS) assigns more codes to mobiles during congestion, but releases them when congestion subsides. Congestion is estimated from the queue lengths of mobiles. A queueing model is established for performance analysis, in which the traffic source is taken to be a Markov-modulated Poisson process (MMPP). Copyright © 2003 AEI
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