Heterogeneous cellular network D2D communication resource allocation method and system

Abstract

The invention provides a heterogeneous cellular network D2D communication resource allocation method and system. The heterogeneous cellular network D2D communication resource allocation method comprises the steps: introducing a millimeter wave frequency band into a constructed heterogeneous cellular network for the communication of a D2D user, and constructing a cellular communication mode and a millimeter wave communication mode; calculating interference power, a signal-to-noise ratio and a transmission rate received by the cellular user and the D2D user in different communication modes, andestablishing a utility function of the D2D user according to the interference power, the signal-to-noise ratio and the transmission rate; and under the condition that the service quality requirementsof the cellular user and the D2D user are met, selecting a communication mode and a channel of the D2D user by utilizing the constructed deep reinforcement learning model and taking the utility maximization of the D2D user as a target according to the current state of the D2D user. The heterogeneous cellular network D2D communication resource allocation method more intelligently solves the resource allocation problem of D2D user communication, effectively reduces the network communication overhead, maximizes the user utility, and improves the overall performance of the network.

Description

technical field [0001] The present disclosure relates to the technical field of wireless communication, and in particular to a method and system for allocating D2D communication resources in a heterogeneous cellular network. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development of the Internet era, the number of mobile devices and applications continues to increase. The existing cellular network has problems such as shortage of spectrum resources and overload, which cannot meet the demand for wireless network services and the increasing rate requirements. Therefore, the current cellular communication system needs to evolve to the next generation (5G) wireless communication system to provide higher system capacity and user data rate. Introducing D2D communication technology into cellular networks has attracted extensive at...

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Problems solved by technology

[0005] The inventors of the present disclosure found that (1) most of the existing D2D communication resource allocation in the heterogeneous cellular network that introduces the millimeter wave frequency band uses heuristic algorithms, game theory and other optimization algorithms to maximize the throughput of the system. The method often obtains a suboptimal solution, and it is difficult to achieve the optimal network; (2) The existing centralized resource allocation method needs to collect accurate instantaneous global channel state information at the base station for centralized resource allocation, which requires a large overhead

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