A slotted CDMA protocol with BER scheduling for wireless multimedia networks
IEEE/ACM Transactions on Networking (TON)
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Computer Networks and Systems: Queueing Theory and Performance Evaluation
Modeling and Simulating Communication Networks: A Hands-on Approach Using Opnet
Modeling and Simulating Communication Networks: A Hands-on Approach Using Opnet
Wcdma for Umts
IEEE Transactions on Mobile Computing
International Journal of Communication Systems - Special Issue: QoS Support and Service Differentiation in Wireless Networks
Dynamic bandwidth allocation with fair scheduling for WCDMA systems
IEEE Wireless Communications
Soft QoS provisioning using the token bank fair queuing scheduling algorithm
IEEE Wireless Communications
Dynamic fair scheduling with QoS constraints in multimedia wideband CDMA cellular networks
IEEE Transactions on Wireless Communications
Time-varying fair queueing scheduling for multicode CDMA based on dynamic programming
IEEE Transactions on Wireless Communications
Efficient radio resource control in wireless networks
IEEE Transactions on Wireless Communications
Fair channel-adaptive rate scheduling in wireless networks with multirate multimedia services
IEEE Journal on Selected Areas in Communications
Fairly adjusted multimode dynamic guard bandwidth admission control over CDMA systems
IEEE Journal on Selected Areas in Communications
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To minimize QoS degradations during nonstationary packet loadings, predictive rate schedulers adapt the operation according to anticipated packet arrival rates deduced via specified estimation algorithm. Existing predictive rate schedulers are developed under the assumption of perfect estimation, which may not be possible in future CDMA-based cellular networks characterized with highly nonstationary and bursty traffic. Additional shortcoming of existing rate schedulers is the coupling of delay and bandwidth, that is, close interdependence of delay and bandwidth (rate), whereby controlling one is accomplished solely by changing the other. In order to mitigate for the arrival rate estimation errors and delay-bandwidth coupling, this paper presents the feedback-enhanced target-tracking weighted fair queuing (FT-WFQ) rate scheduler. It is an adaptive rate scheduler over multiclass CDMA systems with predictive adaptation control to adapt to nonstationary loadings; and feedback-enhanced reactive adaptation control to counteract arrival rate estimation errors. When the predictive adaptation control is not able to maintain long-term delay targets, feedback information will trigger reactive adaptation control. The objective of FT-WFQ scheduler is to minimize deviations from delay targets subject to maximum throughput utilization. Analytical and simulation results indicate that FT-WFQ is able to substantially reduce degradations caused by arrival rate estimation errors and to minimize delay degradations during nonstationary loading conditions.