Dynamic rate and power adaptation for forward link transmission using high-order modulation and multicode formats in cellular WCDMA networks

TitleDynamic rate and power adaptation for forward link transmission using high-order modulation and multicode formats in cellular WCDMA networks
Publication TypeConference Paper
Year of Publication2003
AuthorsKim, D. I., E. Hossain, and V. K. Bhargava
Conference NameGlobal Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Pagination393 - 397 Vol.1
Date Publisheddec.
Keywordsbroadband networks, cellular radio, cellular wideband code division multiple access networks, code division multiple access, downlink data transmission, error statistics, forward link transmission, frame error rate, heuristic-based dynamic rate, high-order modulation, modulation, multicode formats, power allocation schemes, radio links, random micromobility model, signal-to-interference ratio model, WCDMA networks
Abstract

This paper addresses the problem of dynamic rate and power adaptation for forward link data transmission using high-order modulation and multicode formats in cellular wideband code division multiple access (WCDMA) networks. A novel framework for dynamic joint adaptation of modulation order, number of code channels (hence transmission rate) and transmission power is proposed for downlink data transmission in a cellular WCDMA system where the different users have similar frame error rate (FER) requirements. Based on a general downlink signal-to-interference ratio (SIR) model, the problem of optimal dynamic rate and power adaptation is formulated, for which the rate and power allocation can be found by an exhaustive search. Two heuristic-based dynamic rate and power allocation schemes are proposed. Performance of dynamic joint rate and power adaptation under the proposed frame-work is evaluated under random micro-mobility model using computer simulations.

URLhttp://dx.doi.org/10.1109/GLOCOM.2003.1258268
DOI10.1109/GLOCOM.2003.1258268

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