A D2D Communication Energy Efficiency Optimization Method for Guaranteeing the QoS of Cellular Mobile Communication System

Abstract

The invention discloses a D2D communication energy efficiency optimization method for ensuring the QoS of a cellular mobile communication system, which is carried out according to the following steps: the base station selects the downlink frequency band resources of the cellular users in the cell through scheduling and shares them with the selected D2D users to perform device-to-device communication ; The base station obtains real-time channel state information of the downlink transmission link and the interference link; the base station firstly meets the service quality requirements of the cellular users according to the channel state information, and determines the power allocation scheme; the base station sends the power allocation scheme to the D2D transmitter, and the base station and The D2D transmitter completes data transmission according to this power allocation scheme. The present invention can be effectively applied to power allocation scenarios of the downlink cellular layer and D2D layer of an actual mobile communication network, while ensuring the communication quality of cellular users, the energy efficiency of the D2D system is expected to be optimal, the system spectrum efficiency is improved, and the system spectrum efficiency is improved. Reduce overall network energy consumption and interference, in line with the concept of green communication in 5G systems.

Description

technical field [0001] The invention belongs to the field of wireless resource management of a cellular mobile communication D2D system, and in particular relates to a D2D communication energy efficiency optimization method for ensuring QoS of a cellular mobile communication system. Background technique [0002] With the popularization of smartphones and smart terminals, the use of telecommunications will reach new heights in the next few years. The download traffic of cellular phones is expected to grow at a rate of more than eight times per month, and the number of new mobile users in the world is millions of every year. The growth rate continued to rise. At the same time, the 5G network puts forward higher and faster requirements in terms of system capacity and speed requirements. In this context, D2D (Device-to-Device) communication technology has received widespread attention. This technology mainly performs direct communication between users by selectively reusing fre...

AI Technical Summary

Problems solved by technology

Compared with static power control, although dynamic power control increases a certain amount of signaling consumption, it greatly improves the performance of system throughput and energy efficiency.

[0006] In addition, in a cell, the frequency band resources of one cellular user are generally scheduled to be reused by a pair of D2D users, because if there are many D2D links, the interference is large and complicated, and it is difficult to perform effective power control

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