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Dynamic Distributed Resource Allocation in Relay Assisted OFDMA Networks

Authors:
Javad Hajipour
Amr Mohamed
Victor C. M. Leung

Keywords: OFDMA; regenerative buffering relays; dual decomposition; distributed resource allocation

Abstract:
Relay assisted OFDMA networks are promising solutions for provision of high-data-rate services in wide coverage areas. However, the deployment of relays makes the resource allocation a more challenging and complex task. In this paper we study dynamic allocation of power and subchannels in an OFDMA downlink system with regenerative relays which have the capability of buffering the users' data to transmit in a suitable time. We model the network as a multicell scenario with small serving areas and provide a novel framework for resource allocation, in which each of the relays and Base Station (BS) allocate resources based on the queue and channel state information of their own users. We propose a dynamic distributed resource allocation algorithm for this purpose, where BS and relays decide about the allocation of the power and subchannels by passing messages among themselves and based on the local queue and channel state information. Simulation results show significant improvement in terms of system throughput and users' queue stability.

Pages: 415 to 420

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-203-5

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012