Distributed Downlink and Uplink Resource Allocation in D2D Communication

Document Type : Original Article

Authors

Department of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, Iran

Abstract

In current cellular systems, the performance of active users' devices at the cell edge suffers from the poor link quality. However, these connections also requires more resource blocks and transmission power. In order to reduce the number of resource blocks and transmission power, this paper discusses device to device communication in downlink and uplink cases of cellular communication systems. In order to optimize the connections of different network users, which means finding the best user’s connection to a base station (minimum power consumption), which may be established through communication with other users or direct connection with the base station, and to minimize the total transmission power, different optimization methods such as gravitational search optimization, particle swarm optimization, genetic optimization algorithm and distributed strategy based on Q learning and softmax decision making methods are used. The numerical results show a power reduction of around 30 percent for these distributed communications with less computational complexity using the Q learning method compared to the case in which all users traditionally connect through the base station in a centralized way with high computational complexity.

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References

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