Data retransmission method and user equipment in peer-to-peer communication
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: 2017-07-14
HUAWEI TECH CO LTD
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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
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[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 Rad...
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The present invention provides a data retransmission method and device in peer-to-peer communication, including: a first user equipment in a peer-to-peer coordination group receives the first data corresponding to the first data sent by a second user equipment in the peer-to-peer coordination group A retransmission request, the first user equipment acquires the first data according to the identification information and the first retransmission request, and the first user equipment sends the first data to the second user equipment when the first data is successfully acquired. In this way, the first user equipment can acquire the first data, and when the second user equipment fails to receive or demodulate the first data, it directly requests the first user equipment to retransmit the first data without requesting retransmission from the base station, Therefore, the overhead of system time-frequency resources is reduced, and the power consumption of the base station and user equipment 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...
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IPC IPC(8): H04L1/18
Inventor 李强周晗
Owner HUAWEI TECH CO LTD