| Summary: | 碩士 === 國立中興大學 === 電機工程學系 === 90 === In the CDMA/TDD system, the traffic unbalance problem can be solved by providing an easy power control method or propose a new MAC protocol for a time-division duplex (TDD) wideband CDMA system. On the other hand, the CDMA/TDD system can dynamic adjust the unbalanced time slot allocation between the two links to solve the traffic unbalance problem. In this thesis, we propose a new scheme for CDMA/TDD system, which can effectively improve the blocking probability, and system utilization. The Bandwidth Allocation Scheme procedure compared the offer load ratio of the two traffics, and forecast the number of uplink and downlink time slots in the next frame. The system utilization and blocking probability were investigated. The performance of voice and data on unbalance traffic system is simulated by computer. The proposed scheme yields the better performance than CDMA/TDD system.
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