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Cross-Layer Resource Allocation for Variable Bit Rate Multiclass Services in a Multirate Multicarrier DS-CDMA Network

EURASIP Journal on Advances in Signal Processing20052005:602187

Received: 28 July 2003

Published: 21 February 2005


An approximate analytical formulation of the resource allocation problem for handling variable bit rate multiclass services in a cellular round-robin carrier-hopping multirate multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) system is presented. In this paper, all grade-of-service (GoS) or quality-of-service (QoS) requirements at the connection level, packet level, and link layer are satisfied simultaneously in the system, instead of being satisfied at the connection level or at the link layer only. The analytical formulation shows how the GoS/QoS in the different layers are intertwined across the layers. A novelty of this paper is that the outages in the subcarriers are minimized by spreading the subcarriers' signal-to-interference ratio evenly among all the subcarriers by using a dynamic round-robin carrier-hopping allocation scheme. A complete sharing (CS) scheme with guard capacity is used for the resource sharing policy at the connection level based on the mean rates of the connections. Numerical results illustrate that significant gain in the system utilization is achieved through the joint coupling of connection/packet levels and link layer.

Keywords and phrases

bit error rateoutage probabilityvariable bit rate multiclass servicesround-robin carrier hoppingmultirate multicarrier DS-CDMAcross-layer coupling

Authors’ Affiliations

Institute for Infocomm Research, Agency for Science, Technology and Research, Singapore, Singapore
Centre for Wireless Communications, Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Canada
Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore


© Wong et al. 2005