A cellular neural network and utility-based radio resource scheduler for multimedia CDMA communication systems

Chung Ju Chang*, Scott Shen, Li-Chun Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The paper proposes a cellular neural network and utility (CNNU)-based radio resource scheduler for multimedia CDMA communication systems supporting differentiated quality-of-service (QoS). Here, we define a relevant utility function for each connection, which is its radio resource function weighted by a QoS requirement deviation function and a fairness compensation function. We also propose cellular neural networks (CNN) to design the utility-based radio resource scheduler according to the Lyapunov method to solve the constrained optimization problem. The CNN is powerful for complicated optimization problems and has been proved that it can rapidly converge to a desired equilibrium; the utility-based scheduling algorithm can efficiently utilize the radio resource for system, keep the QoS requirements of connections guaranteed, and provide the weighted fairness for connections. Therefore, the CNNUbased scheduler, which determines a radio resource assignment vector for all connections by maximizing an overall system utility, can achieve high system throughput and keep the performance measures of all connections to meet their QoS requirements. Simulation results show that the CNNU-based scheduler attains the average system throughput greater than the EXP [9] and the HOLPRO [5] scheduling schemes by an amount of 23% and 33%, respectively, in the QoS guaranteed region.

Original languageEnglish
Article number5336778
Pages (from-to)5508-5519
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume8
Issue number11
DOIs
StatePublished - 1 Nov 2009

Keywords

  • Cellular neural networks (CNN)
  • Fairness
  • Quality of service (QoS)
  • Radio resource
  • Scheduling
  • Utility function

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