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A d2d data transmission method

A data transmission method and data technology, applied in the direction of network data management, error prevention/detection using the return channel, electrical components, etc., can solve the problem that the data transmission method of the cellular communication system has not been proposed, and the D2D technology cannot directly follow the cellular transmission method, etc. problem, achieve the effect of realizing D2D transmission and reducing impact

Inactive Publication Date: 2017-09-26
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

[0006] Since the system introduces the D2D technology, the base station is only responsible for the transmission control of the control signaling, and the service data is directly transmitted between the UEs, while the existing cellular transmission method is suitable for direct communication between two network element entities (such as between the base station and the UE). ) not only send and receive data but also send and receive corresponding control signaling. Therefore, the cellular transmission method cannot be directly used in D2D technology
[0007] A data transmission method suitable for a cellular communication system that introduces D2D technology has not yet been proposed

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Embodiment Construction

[0021] In order to make the purpose, 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 and specific embodiments.

[0022] The present invention will use uplink resources to perform D2D transmission. At the same time, considering that D2D transmission requires the network side to control the establishment, maintenance and release process of the transmission, that is to say, in D2D transmission, the UE needs to communicate with the base station, so it may happen that the UE needs to communicate with the base station in the same subframe In the case of communication between two network elements, for example, the UE needs to receive D2D data sent by the sending UE in the same subframe, and at the same time, it also needs to send control information (such as ACK / NACK and other UCI information) for D2D data transmission to the base station. However, accordi...

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Abstract

This application discloses a D2D data transmission method. The method uses uplink resources to realize D2D transmission, and controls the subframe and retransmission period used for D2D data transmission during the D2D transmission process, avoiding the use of sending D2D transmission to the base station. The subframe occupied by the control information is used for data transmission, and at the same time, the HARQ process used for the limited retransmission is the same as the HARQ process for the initial transmission, so as to avoid conflicts with the retransmission of the cellular system when D2D data is transmitted between UEs again. The present invention can reduce the influence on the cellular system while effectively realizing the D2D transmission, and is suitable for the cellular communication system introducing the D2D technology.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a D2D (Device to Device) data transmission method. Background technique [0002] In the existing LTE system, the data transmission between two user equipments (UEs) is realized through the transfer of the network side. The UE at the sending end first sends the communication data to the network side, and then the network side sends the data to the network side. forwarded to the receiving end UE. [0003] In practical applications, there is an application scenario where the distance between the UE at the sending end and the UE at the receiving end is relatively close. The communication data between them still needs to be transmitted on the network side before being sent to the other party. Obviously, this will lead to a decrease in network resource utilization efficiency and an increase in control signaling. [0004] Aiming at the problems in the above scenarios, the D2D...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04W8/14
Inventor 鲁智陈哲池连刚
Owner POTEVIO INFORMATION TECH CO LTD