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Joint power, subcarrier and subframe allocation in Multihop relay networks
Author(s) -
Girici Tolga
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.999
Subject(s) - subframe , computer science , relay , subcarrier , base station , computer network , frame (networking) , telecommunications link , scheduling (production processes) , real time computing , power (physics) , orthogonal frequency division multiplexing , mathematical optimization , mathematics , channel (broadcasting) , physics , quantum mechanics
In this paper we study the problem of subframe, subchannel and power allocation in OFDMA‐based multihop relay networks. The system consists of a base station (BS), a number of relay stations (RS) and mobile stations (MS). We consider frame by frame scheduling, where the frame is divided into two subframes such as BS‐RS and RS‐MS subframes. We study two different problems, satisfying link rate requirements with minimum‐weighted total power and maximizing proportional fairness. For the first problem, we find the optimal solution and also propose a less complex subframe and bandwidth allocation scheme with good performance. For the second problem, we propose an algorithm that outperforms an existing scheme with less feedback. Copyright © 2009 John Wiley & Sons, Ltd.