Joint Mode Selection and Resource Allocation for Cellular Controlled Short-Range Communication in OFDMA Networks

Hui DENG  Xiaoming TAO  Ning GE  Jianhua LU  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.3   pp.1023-1026
Publication Date: 2012/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1023
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
short-range communication,  mode selection,  resource allocation,  OFDMA,  

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This letter studies cellular controlled short-range communication in OFDMA networks. The network needs to decide when to allow direct communication between a closely located device-to-device (D2D) pair instead of conveying data from one device to the other via the base station and when not to, in addition to subchannel and power allocation. Our goal is to maximize the total network throughput while guaranteeing the rate requirements of all users. For that purpose, we formulate an optimization problem subject to subchannel and power constraints. A scheme which combines a joint mode selection and subchannel allocation algorithm based on equal power allocation with a power reallocation scheme is proposed. Simulation results show that our proposed scheme can improve the network throughput and outage probability compared with other schemes.