D2D-based downlink energy-efficient power allocation method in distributed antenna system

Abstract

The present invention provides a D2D-based downlink energy-efficient power allocation method in a distributed antenna system, mainly for the D2D-based distributed antenna system, researching effective downlink power allocation schemes, optimizing the energy efficiency of D2D communication, In the system, D2D multiplexes the downlink spectrum resources of CU in underlay mode, which causes interference to both the CU receiving end and the D2D receiving end. In order to ensure normal cellular communication quality, the minimum rate requirement of CU is considered in the design scheme; The energy efficiency optimization problem with distributed antenna power and D2D transmission power as independent variables; using the KKT condition, the original multivariable optimization problem is transformed into a single variable optimization problem, and the closed-form solution of the optimal power is obtained; then a traversal method based on The power distribution algorithm of the algorithm is proved, and the effectiveness of the algorithm is proved; the whole method is simple, feasible and easy to implement.

Description

Technical field: [0001] The invention belongs to the technical field of communication, relates to a resource allocation method for D2D communication, and in particular to a D2D-based downlink energy-efficient power allocation method in a distributed antenna system. Background technique: [0002] In recent years, with the rapid development of smart mobile terminals, mobile Internet and Internet of Things technologies, as well as the ensuing environmental problems, higher and higher requirements have been placed on future wireless communications. How to improve spectrum efficiency with limited spectrum resources to support communication networks with higher transmission rates, higher reliability and higher quality of service; how to obtain maximum throughput with the lowest power loss; how to reduce the waste of spectrum resources to achieve Green communication... These many problems brought along with the development of communication technology have become the focus of curren...

AI Technical Summary

Problems solved by technology

At present, there is almost no research on the downlink energy-efficient power allocation based on D2D communication in distributed antenna systems. Therefore, how to combine these two technologies to maximize the advantages and effectively improve the utilization of spectrum resources has become a topic in D2D research. important direction

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