Uplink resource distribution method, base station and user terminal

Abstract

The present invention discloses an uplink resource distribution method, a base station and a user terminal. The method comprises: the base station obtains resource distribution information for indicating how to perform uplink resource distribution; and the uplink transmission indication information is sent to a user side according to the obtained resource distribution information. According to the technical scheme, prior to the uplink data transmission at the user side, through consideration of the number of the minimum uplink scheduling users and the LBT transmission success rate, the users with the high LBT transmission success rate are selected as possible to be dispatched users, on the premise of ensuring the fairness, the waste of the uplink resource can be avoided as much as possible, and the LBT conflict probability is reduced and the user waiting time delay is decreased so as to improve the channel capacity.

Description

technical field [0001] The present invention relates to LAA technology, in particular to an uplink resource allocation method, a base station and a user terminal. Background technique [0002] With LTE-Advanced (LAA, LTE-Advanced, or LTE-U) proposing the concept of extending the advantages of LTE to unlicensed frequency bands, the long-term evolution (LTE) system can greatly improve the LTE system by using unlicensed frequency bands. throughput, and also reduce operating costs. However, according to the regulatory requirements of several countries and regions, when using unlicensed frequency bands, it is necessary to introduce a Listen Before Talk (LBT, Listen Before Talk) mechanism, that is, to listen to the channel first, and determine whether the channel is an available channel according to the listening results. If it is an available channel, uplink or downlink service data and control signaling can be transmitted. In LAA deployment, the LTE system uses unlicensed freq...

AI Technical Summary

Problems solved by technology

Assuming that the base station allocates uplink resources in subframe n, and sends the UL Grant to the user in subframe (n+1), the user can send uplink data in subframe (n+5) at the fastest time, that is, from the base station To allocate uplink resources to users for uplink data transmission, there is a delay of at least 5 subframes. If the uplink data can be sent smoothly, it is effective to pay such a delay price. However, considering that the LBT mechanism is likely to compete for the channel due to LBT failure, so that the user cannot send uplink data on the subframe (n+5) as scheduled, then the uplink resource of the subframe (n+5) is obviously wasted, and the user waiting delay is increased at the same time

Even if the base station determines that the channel is available through the LBT mechanism, the channel that was previously determined to be available may not be currently available at the time delay of 5 subframes, that is, when the user sends uplink data. Therefore, if the channel is no longer available at this time, The user cannot send uplink data on the subframe (n+5) as scheduled, which also wastes the uplink resources of the subframe (n+5), and also increases the user waiting delay

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