Optimisation of downlink resource allocation algorithms for UMTS networks
EURASIP Journal on Wireless Communications and Networking
A novel joint power and rate assignment algorithm in mixed-size WCDMA cellular systems
Proceedings of the 2006 international conference on Wireless communications and mobile computing
Dynamic power control in a fading downlink channel subject to an energy constraint
Queueing Systems: Theory and Applications
TCP-friendly MPEG-4 streaming video in CDMA networks via power and rate control
International Journal of Wireless and Mobile Computing
The Journal of Supercomputing
Performance analysis of spread spectrum protocols with adaptive spreading
IEEE Transactions on Wireless Communications
Fairness and Throughput Trade-Off Analysis for UMTS WCDMA Network Planning
Wireless Personal Communications: An International Journal
Hybrid inter-sector coordinated multi-point transmission scheme
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Partial information relaying with multiple relays and destination nodes
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
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This paper proposes a novel dynamic joint rate and power control procedure for downlink data transmission in a multicell variable spreading factor wideband code-division multiple-access (WCDMA) system where the different users have similar quality-of-service requirements in terms of the signal-to-interference ratio (SIR). Two variations of the dynamic joint rate and power allocation procedure, namely, Algorithm-1 and Algorithm-2, are presented. The performances of these two schemes are compared to the performance of the optimal dynamic link adaptation for which the rate and power allocation is found by an exhaustive search. The optimality criterion is the maximization of the total radio link level capacity (or sum-rate capacity) in terms of the average number of radio link level frame transmitted per adaptation interval under constrained SIR and power limit in the base station transmitter. The proposed schemes have linear time complexity as compared to the exponential time complexity of the optimal scheme and achieve better radio link level throughput fairness compared to the optimal link adaptation scheme with a moderate loss in total throughput. Performance evaluation is carried out under random and directional micromobility models with uncorrelated and correlated long-term fading, respectively, in a cellular WCDMA environment for both the homogeneous (or uniform) and the nonhomogeneous (or nonuniform) traffic load scenarios.