Harq process transmission method and device on unlicensed frequency band, base station and terminal

Abstract

The present invention provides a HARQ process transmission method and device on an unlicensed frequency band, a base station and a terminal, wherein the HARQ process transmission method includes: the statistical data sending end executes a channel detection mechanism on an unlicensed frequency band to make each HARQ process The number of missed retransmissions, and / or statistics of the time elapsed from the establishment of each HARQ process to the data sender receiving the ACK message; according to the number of missed retransmissions of each HARQ process, and / or each HARQ process from the establishment The length of time elapsed until the data sender receives the ACK message determines the transmission priority of each HARQ process when retransmitting; when it detects that the channel in the unlicensed frequency band can be occupied each time, according to the progress of each HARQ process Transmission priority for retransmissions to which transmission resources are allocated. The present invention can avoid the problem that the HARQ process cannot send data because the channel is always occupied, reduces the average time delay of the HARQ process, and is beneficial to improving the throughput of the system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to a HARQ process transmission method on an unlicensed frequency band, a HARQ process transmission device on an unlicensed frequency band, a base station and a terminal. Background technique [0002] With the rapid increase of communication traffic, the 3GPP authorized spectrum is increasingly insufficient to provide higher network capacity. In order to further improve the utilization of spectrum resources, 3GPP proposes the concept of LAA (LTE Assisted Access, LTE Assisted Access), which is used to use unlicensed spectrum with the help of LTE (Long Term Evolution, Long Term Evolution) licensed spectrum. In order to make the LTE system coexist harmoniously with different systems such as Wi-Fi on the unlicensed frequency band, 3GPP proposed the LBT (Listen Before Talk, Listen Before Talk) mechanism to ensure that the unlicensed frequency band The fairness of using sp...

AI Technical Summary

Problems solved by technology

However, subframe No. 7 of radio frame 1 and subframe No. 3 of radio frame 2 do not occupy channel resources, so uplink data cannot be sent

[0018] If the above situation always occurs in a certain HARQ process, the delay of the HARQ process will be very large, the fairness of resource allocation of each HARQ process cannot be guaranteed, and data loss may occur, seriously affecting user experience and throughput Quantity and performance

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