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A d2d-p multiplexing cellular network communication method that improves spectrum utilization

A D2D-P, cellular network technology, applied in the field of D2D-P multiplexing cellular network communication, can solve the problem that performance indicators such as bit error rate are not considered, and achieve the effect of increasing the rate and ensuring communication priority.

Inactive Publication Date: 2018-11-09
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking into account the interference caused by D2D-P joining the cellular network and the interference between cellular users, but D2D-P communication indicators such as throughput, bit error rate and other performance indicators are not considered

Method used

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  • A d2d-p multiplexing cellular network communication method that improves spectrum utilization
  • A d2d-p multiplexing cellular network communication method that improves spectrum utilization
  • A d2d-p multiplexing cellular network communication method that improves spectrum utilization

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Embodiment

[0055] figure 1 It is a schematic diagram of coexistence of device-to-device user pairs and cellular users in a cellular network. The network includes a cellular base station, and the base station is an evolved base station (evolved NodeBs) of the LTE-A (Long Term Evolution-Advanced, long-term evolution upgrade version) standard. And it fully covers cellular users and device-to-device user pairs. Within its coverage area, K cellular users and M pairs of D2D-P are randomly distributed, where D2D-P is divided into a transmitter and a receiver. Set the number of cellular users, the number of D2D-P transmitting antennas, and the number of receiving antennas to be 2. There are 2 cellular users and 2 pairs of D2D-P within the coverage of the cellular base station. Both D2D-P and cellular users can obtain complete channel state information. .

[0056] figure 2 It is a flow chart of a D2D-P multiplexing cellular network communication method for improving spectrum utilization, incl...

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Abstract

The present invention relates to a D2D-P multiplexing cellular network communication method for improving frequency spectrum utilization, comprising the following steps: S1, establishing a cellular network; S2, according to Hk,m, using the interference alignment method to obtain the N of each D2D-Pm The solution set of row and d column precoding matrix Fm; S3, calculate the interference matrix Hk, mFm of D2D‑Pm to CUk, and design the cellular user postcoding matrix Wk of N rows and d columns orthogonal to Hk, mFm; S4 , use the interference alignment method based on minimizing the mean square error to obtain the transmitter precoding matrix Fm and receiver postcoding matrix Gm of all D2D‑Pm, and communicate; S5, set the SINR threshold ωth of D2D‑Pm, Judging whether the D2D-Pm is connected to the cellular network; S6, using the improved water injection power allocation method to allocate transmission power to all D2D-Pm; S7, performing communication according to the results of steps S2-S6. Compared with the existing technology, the present invention aligns the interference of D2D-P to cellular users to the cellular users, ensures the communication priority of cellular users, controls the mutual interference between D2D-P, and improves the D2D-P and rate.

Description

technical field [0001] The present invention relates to a cellular network communication method, in particular to a D2D-P multiplexing cellular network communication method that improves frequency spectrum utilization. Background technique [0002] With the rapid development of wireless communication, how to maximize the use of spectrum resources in the case of limited spectrum resources has always been a research hotspot. In the cellular network, adding device-to-device-user-pair (D2D-P) into the cellular network to reuse its spectrum resources can improve spectrum utilization, but it will bring inevitable interference to cellular users and affect the transmission rate of cellular users. and other performance indicators. [0003] Aiming at the low utilization rate of spectrum resources in cellular networks and the interference caused by D2D-P to cellular networks, Daquan Feng et al. (Daquan Feng, Lu Lu, Yi Yuan-Wu, Geoffrey Ye Li, Gang Feng, ShaoqianLi. Device-to-Device C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W72/04H04W72/08H04B7/0456H04W72/54
CPCH04B7/0456H04W16/10H04W72/0473H04W72/541H04W72/542Y02D30/70
Inventor 李莉王欢王珍
Owner SHANGHAI NORMAL UNIVERSITY
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