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Power control method in D2D communication based on full duplex relay

A power control, full-duplex technology, used in power management, wireless communication, sustainable communication technology, etc., can solve the problems of low energy utilization, high speed requirements and low power consumption goals, etc., to improve energy utilization efficiency, improve transmission reliability and system capacity, and expand the scope of application

Active Publication Date: 2017-03-22
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the power allocation process in the existing cellular network-based D2D communication system, there are still problems that the high rate requirement and the low power consumption goal cannot be compromised, and the energy utilization rate is relatively low

Method used

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  • Power control method in D2D communication based on full duplex relay
  • Power control method in D2D communication based on full duplex relay
  • Power control method in D2D communication based on full duplex relay

Examples

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Embodiment 1

[0038] Therefore, the present invention proposes a power control method in D2D communication based on full-duplex relay. see figure 1 , the power control method of the present invention involves centralized control of cellular network base station B, D2D terminal S, D2D relay R and D2D terminal D, and there are multiple D2D relays in a single-cell cellular network. The base station B allocates time-frequency resources that are orthogonal to each D2D link and the traditional cellular link, and the establishment, release, and power control of the D2D link are all in charge of the centralized base station B. see figure 2 , the relay R of the present invention works in full-duplex mode, and uses the decoding and forwarding protocol to process the received information, and the specific steps include:

[0039] Step 1: The D2D terminal in the cell sends a communication request to the base station of the cell: when the D2D terminal S in a certain cell needs to transmit information ...

Embodiment 2

[0052] The power control method in D2D communication based on full-duplex relay is the same as that in Embodiment 1. Due to the short-distance communication characteristics of D2D technology, if the channel fading between two D2D terminals to be communicated is relatively large and direct D2D communication is still performed, the quality of information received by the D2D receiving end will be seriously affected. By introducing a relay between two D2D communication terminals, the quality of information received by the receiving end can be improved. There may be multiple available full-duplex relays in a single-cell cellular network.

[0053] In step 2 of the present invention, after the base station B receives the request from the terminal S, it first determines the specific locations of the terminal S and the terminal D, then determines the location of the midpoint of the connection between the terminal S and the terminal D, and finally finds the distance between the terminal...

Embodiment 3

[0055] The power control method in D2D communication based on full-duplex relay is the same as that in Embodiment 1-2. In step 3, the relay R is equipped with two independent antennas, which are respectively responsible for receiving information and forwarding information. When the relay R works in full-duplex mode, the relay R simultaneously sends and receives data in the same spectrum resource. At this time, the information forwarded by the relay R will cause interference to the useful information received by the relay R (called self-interference). Therefore, in order to ensure a high SINR at the relay R, the relay R needs to have Good self-interference cancellation capability.

[0056] Common relay forwarding protocols include amplification forwarding and decoding forwarding. Amplification and forwarding means that the D2D relay simply amplifies the signal after receiving the signal, and then sends it to the receiving end. Decoding and forwarding means that after the rel...

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Abstract

The invention discloses a power control method in D2D communication based on full duplex relay. The power control method comprises the following steps: a cellular network base station B allocates time-frequency resources in which each D2D link and a cellular link are orthogonal to each other; when a terminal S and a terminal D hope to perform communication in a D2D mode, a base station B selects a suitable full duplex decoding forwarding relay R for the D2D link, and then the base station B compares the maximum energy efficiency of the D2D link based on the full duplex relay with the maximum energy efficiency of the direct connection D2D link through power control conditions on the premise of guaranteeing that the transmitting power of the terminal S and the terminal R does not exceed the maximum value, and selects a mode with high energy efficiency to perform the communication. The power control method disclosed by the invention is conducive to improving the spectral efficiency, expanding the application range of the D2D technology, unloading the burden of the base station to a greater extent, considering the balance between the transmission rate and the power consumption, ensuing more flexible selection of the communication mode of the D2D link and better satisfying the requirements of green communication in actual communication systems.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and mainly relates to power control in D2D relay communication, specifically a power control method in D2D communication based on full-duplex relay, which is applicable to the power control in cellular network based on full-duplex relay. The field of wireless communication technology. Background technique [0002] In recent years, the mobile communication standardization organization 3GPP-LTE has paid attention to and researched a new short-distance data transmission technology, that is, the terminal direct technology. Direct-to-device (hereinafter referred to as D2D) communication refers to a communication method in which adjacent terminals can directly transmit data without forwarding through a base station. The short-distance and direct-connection communication methods of D2D technology have the advantages of high data rate, low transmission delay, and low power consumption; us...

Claims

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Application Information

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IPC IPC(8): H04W40/20H04W40/22H04W52/24H04W52/46H04W76/02H04W88/04
CPCH04W40/20H04W40/22H04W52/241H04W52/46H04W76/14H04W88/04Y02D30/70
Inventor 杨鲲王茹赵力强卢小峰
Owner XIDIAN UNIV
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