Joint Mode Selection and Resource Allocation for Relay-Based D2D Communications

This letter studies the joint mode selection, resource group (RG) assignment, and power allocation for D2D underlaid cellular communication systems. We formulate a resource allocation problem, which aims at maximizing the system sum rate of all D2D and cellular links while guaranteeing the required...

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Bibliographic Details
Published in:IEEE communications letters 2017-02, Vol.21 (2), p.398-401
Main Authors: Tuong Duc Hoang, Long Bao Le, Tho Le-Ngoc
Format: Article
Language:English
Subjects:
cellular networks
Complexity theory
D2D communication
Device-to-device communication
Indexes
mode selection
power allocation
Receivers
Relays
Resource allocation
Resource management
sub-channel
Transmitters
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Summary:This letter studies the joint mode selection, resource group (RG) assignment, and power allocation for D2D underlaid cellular communication systems. We formulate a resource allocation problem, which aims at maximizing the system sum rate of all D2D and cellular links while guaranteeing the required minimum rates of cellular and D2D links. To solve this problem, we first characterize the optimal power allocation when a D2D link operates in the direct or relay mode. Then, using these power allocation results, the joint mode selection and RG assignment can be formulated as a job assignment problem whose optimal solution can be obtained in polynomial time. Numerical results demonstrate that the proposed design significantly outperforms conventional schemes.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2016.2617863