Resource reuse method and system for improving energy efficiency of D2D (device-to-device) system

Abstract

The invention discloses a resource reuse method and a resource reuse system for improving the energy efficiency of a D2D (device-to-device) system. The method comprises the following steps that 1, the position estimation is carried out on the emitting end and the receiving end of D2D user pairs, and the position information is obtained; 2, whether the distance from the sending end to the receiving end is greater than the threshold value or not is judged according to the position information, when the distance is greater than the threshold value, the current timeslot idle cellular users are selected to be used as a relay node, in addition, the operation enters the third step, and otherwise, the operation directly enters the third step; 3, the cellular users with resources distributed by a base station and each group of D2D users are respectively combined, and an energy efficiency matrix and a velocity matrix are built; 4, the resource reuse decision making is carried out on the basis of the preset criterion, and the channel reuse matrix is obtained through solving; 5, the reuse cellular users of each group of D2D user pairs and the corresponding optimum emitting velocity are determined. The resource reuse can be carried out at the same time as the expenditure reduction realization only according to the position information of users in a cell, and the total energy efficiency of a communication system is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and system for resource multiplexing for improving energy efficiency of a D2D system. Background technique [0002] With the development of wireless multimedia services, the increasing demand for local data sharing services puts forward higher requirements for the capacity, coverage and service flexibility of the IMT-Advanced system. The traditional base station-centered communication method is adapting to local services. There are obvious limitations in terms of transmission. D2D (Device-to-Device, that is, terminal direct technology) refers to a method in which adjacent terminals can transmit data through a direct link within a short distance without forwarding through a central node (ie, a base station). The short-distance communication characteristics of D2D communication technology make it have the advantages of high speed, low delay and high spectru...

AI Technical Summary

Problems solved by technology

Today, with the rapid increase in the number of users and the expansion of network scale, the energy consumption of wireless networks has increased sharply, and the greenhouse gas emissions and environmental pollution caused by the huge energy consumption have aroused widespread concern from operators and the whole society. Therefore, optimization The energy consumption of wireless networks, improving its energy efficiency has become an inevitable trend in the development of wireless communications, but the existing technology randomly selects cellular users for resource reuse and cannot improve the total energy efficiency of the system

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