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D2D-P multiplexing cellular network communication method capable of increasing frequency spectrum utilization rate

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.

Inactive Publication Date: 2016-06-22
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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  • D2D-P multiplexing cellular network communication method capable of increasing frequency spectrum utilization rate
  • D2D-P multiplexing cellular network communication method capable of increasing frequency spectrum utilization rate
  • D2D-P multiplexing cellular network communication method capable of increasing frequency spectrum utilization rate

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Embodiment

[0055] figure 1 It is a schematic diagram of the coexistence of device-to-device user pairs and cellular users in a cellular network. The network includes a cellular base station, which is an evolved base station (evolvedNodeBs) of the LTE-A (LongTerm Evolution-Advanced, long-term evolution upgrade version) standard, and fully covers Cellular user 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, including the followi...

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Abstract

The invention relates to a D2D-P multiplexing cellular network communication method capable of increasing a frequency spectrum utilization rate. The method comprises the following steps of S1, establishing a cellular network; S2, according to Hk,m, using an interference alignment method to acquire a solution set of an N row and d column precoding matrix Fm of each D2D-Pm; S3, calculating an interference matrix Hk,mFm of the D2D-Pm to CUk and designing an N row and d column cellular user postposition coding matrix Wk orthogonal to the Hk,mFm; S4, using the interference alignment method based on a minimum mean square error to acquire transmitter precoding matrixes Fm and receiver postposition coding matrixes Gm of all the D2D-Pm and carrying out communication; S5, setting a SINR threshold omegath of the D2D-Pm and determining whether the D2D-Pm is connected to the cellular network; S6, using an improved water injection power distribution method to send power to all the D2D-Pm distribution; and S7, according to results of the step S2 to the step S6, carrying out communication. Compared to the prior art, by using the method, interferences of the D2D-Ps on a cellular user are aligned to a cellular user position; a communication priority of the cellular user is guaranteed; mutual interference among the D2D-Ps is controlled and a D2D-P sum rate is increased.

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 cellular network spectrum resources and the interference caused by D2D-P to cellular networks, DaquanFeng et al. (DaquanFeng, LuLu, YiYuan-Wu, GeoffreyYeLi, GangFeng, ShaoqianLi. , NO.8, pp.3541-3551, AUGUST2...

Claims

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Application Information

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