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Data retransmission method and communication equipment

A technology for data retransmission and communication equipment, applied in the field of communication, can solve problems such as data packet interference, failure to eliminate data packet errors, and affecting data retransmission performance

Active Publication Date: 2015-05-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the current ARQ technology, the transmission mode used by the transmitter device to retransmit the data packet to the receiver device is the same as the transmission mode used to send the data packet normally, but the data packet sent using the same transmission mode may receive the same interference. As a result, the errors in the data packets cannot be eliminated after combining the data packets sent multiple times, thus affecting the performance of data retransmission

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  • Data retransmission method and communication equipment
  • Data retransmission method and communication equipment
  • Data retransmission method and communication equipment

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Embodiment Construction

[0115] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0116] In the existing ARQ technology, the transmission mode used by the transmitting end device to retransmit the data packet to the receiving end device is the same as the transmission mode used to send the data packet normally, but the data packet sent using the same transmission mode may receive the same interference , resulting in that errors...

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Abstract

Provided are a data retransmission method and a communication device. The data retransmission method comprises: sending, by a transmitting end device, a first data set to a receiving end device using a first transmitting mode set; and retransmitting, by the transmitting end device, the first data set to the receiving end device using a second transmitting mode set, so that the receiving end device merges the first data set sent by the transmitting end device using the first transmitting mode set with the first data set retransmitted using the second transmitting mode set and demodulates the first data set, the transmitting modes in the first transmitting mode set and the transmitting modes in the second transmitting mode set being orthogonal in one-to-one correspondence or being quasi-orthogonal. The data retransmission method and communication device provided in the embodiments of the present invention are used for improving the performance of data retransmission.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communication, and in particular, to a data retransmission method and a communication device. Background technique [0002] In a wireless communication environment, the wireless transmission channel may have poor channel transmission quality due to channel noise, fading or interference, and the data received by the receiving device may have errors. Therefore, automatic retransmission requests ( Automatic Retransmission Request, ARQ) technology. [0003] The existing ARQ technology has two mechanisms. One is that when the receiver device receives a data packet transmitted by the transmitter device, it detects the received data packet through cyclic redundancy check code (Cyclic Redundancy Check, CRC). When there is an error in the data packet, the transmitting end device is notified to resend the data packet, and the receiving end device combines the same data packets received tw...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04L1/1825H04L1/1845
Inventor 吴涛卢伟山
Owner HUAWEI TECH CO LTD