Data retransmission method for non-authorized frequency spectrums, and device

Abstract

The invention provides a data retransmission method for non-authorized frequency spectrums, and a device. The method comprises steps that, when feedback information sent by data reception part equipment for a target HARQ process on a designated non-authorized carrier wave is received, whether the feedback information is ACK or NACK is determined; when the feedback information is NACK is determined, whether data sending part equipment can continue occupying the designated non-authorized carrier wave at predetermined retransmission-needing time is determined; if the designated non-authorized carrier wave can continue occupying the designated non-authorized carrier wave is determined, the target HARQ process is retransmitted on the designated non-authorized carrier wave, and / or on authorized frequency spectrums and / or other occupied non-authorized carrier waves; if the data sending part equipment can not continue occupying the designated non-authorized carrier wave is determined, the target HARQ process is retransmitted on the authorized frequency spectrums and / or other occupied non-authorized carrier waves. Through the method, data on the non-authorized frequency spectrums can be smoothly retransmitted.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to a method for retransmitting data on an unlicensed spectrum and a device for retransmitting data on an unlicensed spectrum. Background technique [0002] The 3GPP standard organization approved the LAA (Licensed-Assisted Access) research project based on LTE (LongTerm Evolution, long-term evolution) in the TSGRAN#65 plenary session. This project mainly studies how to deploy LTE networks on unlicensed spectrum. , so as to achieve the purpose of using the unlicensed spectrum fairly and effectively and improving the data transmission rate of the LTE system. [0003] There are two ways for LTE to use unlicensed spectrum. One is: use unlicensed spectrum only in downlink data transmission; the other is: unlicensed spectrum can be used in both uplink and downlink data transmission. The time-division multiplexing method is on the same unlicensed carrier. This time-divisio...

AI Technical Summary

Problems solved by technology

[0009] In this technical solution, by determining whether the feedback information sent by the target HARQ process on the designated unlicensed carrier is ACK (acknowledgment information) or NACK (non-acknowledgement information), it is judged whether it is necessary to retransmit the data, specifically, when receiving When ACK is received, it indicates that the data receiving device has received it correctly and does not need to retransmit the data. When NACK is received, it indicates that the data receiving device has received incorrectly and needs to retransmit the data; and when it is determined that the data sending device needs to retransmit the data, Judging whether the data sender device can continue to occupy the designated unlicensed carrier at the predetermined time when retransmission is required, so that when it is determined that the designated unlicensed carrier cannot continue to be occupied, on the authorized spectrum, and / or on other occupied The retransmission target HARQ process on the unlicensed carrier solves the problem in the related technology that the data sender equipment cannot retransmit the data because the continuous occupation of the unlicensed spectrum has reached the maximum allowable continuous channel occupancy time. The data can be retransmitted smoothly, so as to ensure that the bit error rate of data transmission is controlled within the specified range; at the same time, when it is determined that the designated unlicensed carrier can continue to be occupied, the target HARQ process can be retransmitted on the designated unlicensed carrier, and the authorized Retransmit the target HARQ process on the spectrum and / or on other unlicensed carriers that can be occupied, which further ensures that data on the unlicensed spectrum can be retransmitted smoothly

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