Dynamic rate and power adaptation for provisioning class-based QoS in Cellular Multirate WCDMA systems

TitleDynamic rate and power adaptation for provisioning class-based QoS in Cellular Multirate WCDMA systems
Publication TypeJournal Article
Year of Publication2004
AuthorsKim, D. I., E. Hossain, and V. K. Bhargava
JournalWireless Communications, IEEE Transactions on
Volume3
Pagination1590 - 1601
Date Publishedsep.
ISSN1536-1276
Keywordsbroadband networks, cellular multirate WCDMA systems, cellular radio, code division multiple access, data communication, directional micromobility model, downlink data transmission, dynamic joint rate, dynamic link adaptation, fading, multicell variable spreading factor, power adaptation framework, provisioning class-based QoS, quality of service, radio links, radiofrequency interference, random micromobility model, signal-to-interference ratio, SIR, uncorrelated long-term fading, wideband code division multiple access
Abstract

This paper addresses the problem of dynamic link adaptation under multiple quality-of-service (QoS) constraints in cellular wideband code-division multiple-access (WCDMA) systems. A novel dynamic joint rate and power adaptation framework is proposed for downlink data transmission in a multicell variable spreading factor (VSF) WCDMA system where the different classes of users have different signal-to-interference ratio (SIR) requirements. Based on a general downlink SIR model, the problem of optimal dynamic rate and power adaptation under multiple SIR constraints is also formulated, for which the rate and power allocation can be found by an exhaustive search. Two schemes, namely, near-optimal and suboptimal schemes, are proposed for implementation-friendly dynamic rate and power adaptation. Performance of dynamic joint rate and power adaptation under the proposed framework is evaluated under random micro-mobility model with uncorrelated long-term fading and a directional micro-mobility model with correlated long-term fading in a cellular WCDMA environment.

URLhttp://dx.doi.org/10.1109/TWC.2004.833492
DOI10.1109/TWC.2004.833492

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