D2D-based downlink power allocation method with high energy efficiency in distributed antenna system

Abstract

The invention provides a D2D-based downlink power allocation method with high energy efficiency in a distributed antenna system. An effective downlink power allocation scheme is researched mainly forthe D2D-based distributed antenna system, the energy efficiency of D2D communication is optimized, the D2D multiplexes the downlink spectrum resources of a CU in an underlay mode in the system, so that both of a CU receiving end and a D2D receiving end are interfered, therefore in order to ensure the normal cellular communication quality, the minimum rate requirement of the CU is considered when the scheme is designed; an energy efficiency optimization problem using the distributed antenna power and the D2D transmitting power as independent variables is constructed; the original multivariate optimization problem is converted into a univariate optimization problem by using a KKT condition to obtain a closed-form solution of the optimal power; then, a power allocation algorithm based on a traversing method is designed, and the effectiveness of the algorithm is proved; and the whole method is simple and feasible, and is 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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