Channel detection method and system, base station and terminal

Abstract

The invention provides a channel detection method and system, a base station and a terminal used when an LTE system works at an unauthorized frequency band. The channel detection method includes the following steps that a channel monitoring subframe taking a first period as a channel state monitoring period is arranged in a frame structure of the LTE system; whether the number of times of the situation that channel states continuously detected by the channel monitoring subframe are busy states reaches a preset number of times is judged; when it is determined that the number of times of the situation that the channel states continuously detected by the channel monitoring subframe are the busy states reaches the preset number of times, the detection period of the channel monitoring subframe is adjusted into a second period longer than the first period. According to the technical scheme, under the premise that normal work of the LTE system at the unauthorized frequency band is guaranteed, the LTE system can be prevented from generating larger interference in other systems when working at the unauthorized frequency band, and meanwhile the power consumption of the terminal and/or the base station is reduced when channel detection is executed.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a channel detection method when an LTE system works in an unlicensed frequency band, a channel detection system when an LTE system works in an unlicensed frequency band, a base station and a terminal. Background technique [0002] With the rapid increase of communication traffic, the authorized spectrum of 3GPP is increasingly insufficient to provide higher network capacity. In order to further improve the utilization of spectrum resources, 3GPP is discussing how to use unlicensed spectrum, such as 2.4GHz and 5GHz frequency bands, with the help of licensed spectrum. These unlicensed spectrums are currently mainly used by Wi-Fi, Bluetooth, radar, medical and other systems. [0003] Usually, access technologies designed for licensed frequency bands, such as LTE (Long Term Evolution, long-term evolution) are not suitable for use in unlicensed frequency bands, because...

AI Technical Summary

Problems solved by technology

In order to coexist better with Wi-Fi, LTE needs a LBT (Listen Before Talk, listen before talk) mechanism, and the LBT mechanism similar to Wi-Fi will continue to detect when the channel is busy until it detects Until the channel is idle, such an LBT mechanism makes the main body (base station or terminal) that performs LBT consume too much energy, which is not conducive to energy saving

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