| Summary: | 博士 === 國立中正大學 === 電機工程研究所 === 89 === In the dissertation, we have addressed the MAC scheme at the medium access control layer of the integrated multimedia service wireless networks. In particular, the focus of the dissertation is concentrated on studying MAC schemes constrained to meet QoS requirements by taking advantage of the two concepts — one based on the demand assignment concept and the other based on the centralized resource allocation concept. These two important concepts can be realized and implemented with the so-called time-frequency signaling scheme. In the des-igned systems, the BS has complete knowledge of the bandwidth demand of all the MTs in the system. Thus, the multiple access problem is demand assigned and centralized, in contrast to the systems based on PRMA and its variants where the BS is less active in the allocation of the bandwidth. The scheduling algorithm is also suggested to an efficient tool to solve the traffic congestion when the channel may not be available to certain sources even though they may have information to transmit. By accomplishing these works, we expect these general concepts, including the centralized resource allocation, the demand assignment allocation, and the scheduling algorithm, to reveal the guidelines for the MAC protocol design in the future broadband wireless networks.
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