D2D communication energy efficiency optimization method for guaranteeing QoS of cellular mobile communication system

Abstract

The invention discloses a D2D communication energy efficiency optimization method capable of guaranteeing QoS of a cellular mobile communication system. The D2D communication energy efficiency optimization method comprises the following steps that a base station selects downlink frequency band resources of cellular users in a cell through scheduling and shares the downlink frequency band resourcesto the selected D2D users for 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 determines a power distribution scheme according to the channel state information and preferentially meets the service quality requirements of cellular users; and the base station sends the power distribution scheme to the D2D transmitting terminal, and the base station and the D2D transmitting terminal complete data transmission according to the power distribution scheme. The method can be effectively applied to power distribution scenes of a downlink cellular layer and a D2D layer of an actual mobile communication network; the energy efficiency expectation of the D2D system is optimized while the communication quality of cellular users is guaranteed, the frequency spectrum efficiency of the system is improved, the overall network energy consumption and interference are reduced, and theidea of green communication of the 5G system is met.

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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