Method for designing reflecting surface assisted device-to-device communication system

A technology for device communication and system design, applied in machine-to-machine/machine-type communication services, wireless communication, radio relay systems, etc., and can solve problems such as link interference

Active Publication Date: 2020-06-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in a densely deployed D2D communication network, there is non-negligible interference between links opera...

Method used

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  • Method for designing reflecting surface assisted device-to-device communication system
  • Method for designing reflecting surface assisted device-to-device communication system
  • Method for designing reflecting surface assisted device-to-device communication system

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples.

[0034] The present invention proposes a D2D communication system assisted by an intelligent reflecting surface. The system consists of N single-antenna D2D device pairs, K cellular users, a base station, and an intelligent reflector. The intelligent reflective surface includes M passive reflective units and a controller connected to them; wherein, each reflective unit adjusts the amplitude and phase of the incident signal before reflection, and the controller can dynamically adjust the amplitude and phase offset of the reflective unit, intelligently Reconfigure the wireless communication environment to achieve useful signal enhancement and interference suppression.

[0035] Considering a single-antenna base station, assuming that all devices deploy a single antenna, the number of reflection u...

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Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to a design method of a reflecting surface assisted device-to-device communication system. The scheme of the invention is as follows: a base station receives useful signals from cellular users and interference signals from D2D sending equipment multiplexing the same frequency band; and the D2D receiving equipment receives the useful signals from the corresponding D2D sending equipment and the interference signals from the cellular users sharing the same frequency band. According to the invention, the pairing scheme of the D2D pair and the cellular user is determined through a heuristic method, and the sending power of the D2D link and the cellular link and the passive beamforming of the reflecting surface are optimized in a combined manner, so that the maximization of the system sum rate is realized under the condition of meeting the communication rate requirements of the D2D user and the cellular user. Through simulation verification, under the conditions that normal communication of a traditional cellular system is not affected and energy, frequency spectrum and cost expenditure are not additionally increased, the system sum rate is greatly increased, and the method has very high application value and development potential.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a device-to-device communication system design method assisted by a reflecting surface. Background technique [0002] Device-to-Device (Device-to-Device, D2D) communication is a new type of communication technology that allows a device to communicate with its neighbors using the cellular licensed frequency band without the participation of a Base Station (BS). Specifically, the direct communication between devices does not need to be transferred through the base station, which reduces the load of the base station, reduces communication overhead and transmission delay. D2D devices and cellular users share spectrum resources, which improves the spectrum efficiency of the overall network and enables the system to accommodate more users. In addition, D2D communication can be used to form an emergency communication network, thereby improving the robustness ...

Claims

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Application Information

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IPC IPC(8): H04W4/70H04W16/14H04W24/02H04B7/145
CPCH04W4/70H04W16/14H04W24/02H04B7/145
Inventor 梁应敞杨刚廖雅婷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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