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D2D (Device to Device)-user power-controlling and resource-allocating method of fractional-frequency reuse honeycomb cell

A technology of fractional frequency multiplexing and cellular cells, which is applied in the field of communication, can solve the problems of power control D2D system and cellular communication system interference, interference, D2D user access area and reusable resource area optimization, etc., to reduce the number of users Effects of energy consumption, improving system throughput, and improving spectrum utilization

Active Publication Date: 2013-05-01
ZHEJIANG UNIV
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Problems solved by technology

[0004] After analyzing the existing methods, it is found that the method proposed in the literature does not involve the power control of D2D users. Power control plays a significant role in coordinating the interference between the D2D system and the cellular communication system; The user accessible area and the reusable resource area are optimized, and there may still be large interference in some cases, especially when the D2D user is located in the cell edge area

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  • D2D (Device to Device)-user power-controlling and resource-allocating method of fractional-frequency reuse honeycomb cell
  • D2D (Device to Device)-user power-controlling and resource-allocating method of fractional-frequency reuse honeycomb cell
  • D2D (Device to Device)-user power-controlling and resource-allocating method of fractional-frequency reuse honeycomb cell

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[0076] The present invention provides a first embodiment. The technical scenario provided by this embodiment is that cell radius R=500m, fractional frequency reuse boundary radius R=300m, and noise power N 0 =-121dBm, 30 central cellular users and 12 pairs of D2D communication user pairs are randomly distributed in the central area of ​​each cell, 20 central cellular users and 8 pairs of D2D communication user pairs are randomly distributed in the edge area of ​​each cell, and the maximum distance between D2D communication pairs is 35m ; cellular user SINR threshold γ cth =3dB, outage probability threshold ε cth =0.05; D2D user SINR threshold γ dth =3dB, outage probability threshold ε dth =0.05; large-scale fading path loss index α=3.76, small-scale fading obeys the exponential distribution with parameter 1;

[0077] Set the central D2D user multiplexable channel resource area as the edge area of ​​the adjacent cell; set the edge D2D user access area as the edge area of ​​t...

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Abstract

The invention discloses a power-controlling and channel-resource allocating method of D2D(Device to Device) communication-system reuse honeycomb uplink-channel resources in a fractional frequency reuse (FFR) honeycomb cell, which comprises the D2D communication-channel resource allocation in the FFR honeycomb cell and the D2D communication-system power control in the FFR honeycomb cell. The D2D communication-channel resource allocation in the FFR honeycomb cell comprises the following steps of: acquiring the mutual distance of both sides of D2D communication and the transmitting power of a honeycomb user; obtaining the positioned area of an accessible D2D user, i.e. a D2D-user accessible area; and obtaining the positioned area of a multiplexed honeycomb, i.e. a multiplexing channel-resource area. The D2D communication-system power control in the FFR honeycomb cell comprises the following steps of: judging the positioned D2D-user accessible area of the D2D user; judging the multiplexing channel-resource area of the D2D user; acquiring the transmitting power of the position of the multiplexed honeycomb user in the multiplexing channel-resource area; and obtaining the transmitting power of the D2D user.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method for power control and channel resource allocation of multiplexed cellular uplink channel resources in a D2D (Device-to-Device) communication system under a cellular cell environment deployed by Fractional Frequency Reuse (FFR). . Background technique [0002] Introducing a D2D (Device-to-Device) communication system into a fractional frequency multiplexing cellular network can improve spectrum utilization, improve system throughput, and reduce user energy consumption. In the case that the D2D communication system reuses cellular user channel resources, the mutual interference between the D2D communication system and the cellular communication system will lead to a decrease in the signal-to-interference-noise ratio (SINR) of both parties, thereby degrading the communication quality of both parties. [0003] The channel resource allocation method introduced into the ...

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Application Information

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IPC IPC(8): H04W52/02H04W52/18H04W72/04
CPCY02D30/70
Inventor 余官定鲍鹏程钟财军殷锐徐艳芳
Owner ZHEJIANG UNIV
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