Adaptive resource allocation strategies for dynamic heterogeneous traffic in TD-CDMA/TDD systems |
Posted on:2007-09-23 | Degree:Ph.D | Type:Dissertation |
University:Oklahoma State University | Candidate:Pethuraj, Rajpamal R | Full Text:PDF |
GTID:1448390005459838 | Subject:Engineering |
Abstract/Summary: | |
Scope and method of study. The purpose of this study was to investigate the co-channel interference present in TD-CDMA/TDD systems and TDMA/TDD systems and propose methods to avoid the co-channel interference. Time Slot Opposing algorithm which avoids co-channel interference in TD-CDMA/D-TDD system is reviewed as part of background study. The interference scenarios in TDMA/D-TDD systems are then studied and methods to avoid co-channel interference are proposed. The algorithms are then tested using real Internet data traffic to obtain a realistic analysis.; Findings and conclusions. Based on the background research, an extended Max {lcub}SIR{rcub} algorithm is proposed to avoid co-channel interference in TDMA/D-TDD systems. This algorithm is a centralized dynamic channel allocation algorithm that uses information from all the cells in the system to avoid co-channel interference and increase the signal power-to-interference power outage probability ratio. The proposed algorithm is then applied to a TDMA/D-TDD system that have subscribers grouped based on priority. As a last step of the research, traffic in TDMA/D-TDD systems is modeled using the ON-OFF traffic modeling and the Max {lcub}SIR{rcub} algorithm is applied. The results obtained using ON-OFF traffic modeling matched with the results obtained using analytical simulations. |
Keywords/Search Tags: | Traffic, Systems, Co-channel interference, Algorithm, Using |
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