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Method for data retransmission in end-to-end communication and user devices

A technology for user equipment and data retransmission, which is applied in the direction of error prevention/detection using the return channel, and can solve problems such as resource consumption, occupation of system time-frequency resources, and power consumption of base stations and user equipment.

Inactive Publication Date: 2014-05-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The user equipment needs to occupy the time-frequency resources of the system during retransmission, and consumes the power of the base station and the user equipment
If the user equipment in the D2D cooperation group feeds back ACK or NACK signaling to the base station, unnecessary resources will be consumed

Method used

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  • Method for data retransmission in end-to-end communication and user devices
  • Method for data retransmission in end-to-end communication and user devices

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Embodiment Construction

[0102] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0103] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, referred to as "GSM") system, Code Division Multiple Access (Code Division Multiple Access, referred to as "CDMA") ”) system, Wideband Code Division Multiple Access (WCDMA for short) system, General Packet Ra...

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Abstract

The invention provides a method and device for data retransmission in end-to-end communication. The method comprises the steps of utilizing a first user device in an end-to-end cooperative group to receive a first retransmission request corresponding to first data and sent by a second user device in the end-to-end cooperative group, utilizing the first user device to obtain the first data according to identification information and the first retransmission request, and utilizing the first user device to send the first data to the second user device on the conditions that the first user device obtains the first data successively. The first user device can obtain the first data, the second user device directly requests the first user device to retransmit the first data on the conditions of failing in receiving or demodulation of the first data fails, the second user device does not need to request a base station to perform retransmission, so that expenses of system time-frequency resources are reduced, and power consumption of the base station and the user devices is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wireless communication, and more specifically, relate to a data retransmission method and user equipment in peer-to-peer communication. Background technique [0002] With the advancement of cellular communication technology, two or more user equipment (User Equipment, user equipment) can form a peer-to-peer (device to device, D2D) cooperation group, so that the signal between two terminals does not need to pass through the base station, and belongs to The user equipments in the D2D cooperation group can directly communicate with each other by establishing a D2D link, which is called D2D communication. When the user equipments in the D2D cooperation group perform D2D communication, since the distance between the user equipments may be very close or there is a direct path, the channel quality of the D2D link will be very good and can support very high-speed transmission. Especially un...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 李强周晗
Owner HUAWEI TECH CO LTD
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