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Method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in honeycomb and D2D hybrid network

A hybrid network and cellular communication technology, applied in wireless communication, electrical components, etc., can solve the problems of not being able to obtain all the control information of CeUE, unrealistic, and large amount of calculation, so as to reduce the decoding operation task, reduce the burden, and achieve flexible operation. Effect

Active Publication Date: 2015-06-24
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0014] In the above example, after the CA technology is introduced in the mixed network of LTE-A cellular mode and D2D mode, decoding the PDCCH on a CC cannot obtain all the control information of a CeUE, and the D2D UE needs to decode the PDCCH of all carriers. Such calculation The amount will be very large, it is unrealistic

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  • Method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in honeycomb and D2D hybrid network
  • Method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in honeycomb and D2D hybrid network
  • Method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in honeycomb and D2D hybrid network

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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] The method of the present invention can be applied to the following scenarios:

[0038] Cellular transmission adopts frequency division duplex FDD (Frequency Division Duplexing) or time division duplex TDD (Time Division Duplexing) transmission mode, D2D mode communication adopts TDD mode, and D2D UE multiplexes uplink spectrum resources of CeUE.

[0039] The cellular transmission is based on the LTE-A cellular network, but it can also be applied to other hybrid networks based on Orthogonal Frequency Division Multiple Access (OFDMA) technology. Or in a scenario where the CeUE does not use the CA technology, at this time, the CC is replaced by a carrier or certain set resource blocks (RBs).

[0040] The basic idea of ​​the method of the present invention is...

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Abstract

A method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in a honeycomb and D2D hybrid network includes that according to interference information reported by D2D user equipment (EU) and historical information dispatched by uplink stored by a base station, after the base station distinguishes cellular user equipment (CeUE) of a cellular user which causes harmful interference to a particular D2D UE, the base station provides radio network temporary identifier (RNTI) causing the interference to the D2D UE and related information for the disturbed D2D UE to assist the D2D UE to decode CeUE information causing the interference to the D2D UE. By using the method, the D2D UE is capable of forecasting disturbed condition of the CeUE in a corresponding transmission time interval (TTI) and performing a corresponding radio resource management operation to avoid the harmful interference to the subsequent D2D mode communications caused by the CeUE. Through the assist of the base station, operation of calculating and decoding of a physical downlink control channel (PDCCH) by the D2D UE is simple, flexible and convenient and workable in a long term evolution (LTE) / LTE-A system.

Description

technical field [0001] The invention relates to a method for avoiding interference of cellular communication to D2D communication in a D2D (Device-to-Device) hybrid network connecting cells and terminals, and belongs to the technical field of wireless communication. Background technique [0002] The current wireless communication network is mainly divided into two types: cellular network and Ad-hoc (point-to-point) network. The communication characteristics of these two networks are introduced as follows: [0003] Cellular network: its coverage area is divided into multiple cells, and each cell has its own base station working at different frequencies. A user terminal UE (User Equipment) communicates with other user terminals through a base station, and this communication mode is called a cellular mode. Even when the distance between the receiving and transmitting terminals is very close, communication must be carried out through the base station. [0004] Ad-hoc network:...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/12
Inventor 漆渊王乐菲彭涛刘子扬
Owner BEIJING UNIV OF POSTS & TELECOMM
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