Channel detection method, channel detection device, and terminal

Abstract

The invention provides a channel detection method, a channel detection device, and a terminal of an LTE system working in an unauthorized frequency band. The channel detection method of the LTE system working in the unauthorized frequency band is characterized in that indication information transmitted by a base station can be received; upstream channel detection can be carried out in the unauthorized frequency band; when the upstream channel is detected to be in the idle state, the upstream data can be transmitted. By adopting the technical scheme, the reasonable channel detection process of the terminal can be carried out, and under the precondition of improving the utilization rate of the frequency spectrum, the coexistence with other systems in the unauthorized frequency band can be realized, and at the same time, the fairness of the channel competition in the unauthorized frequency band can be guaranteed.

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 device when an LTE system works in an unlicensed frequency band, and a terminal. Background technique [0002] At present, with the rapid development of mobile services, the capacity of the existing wireless spectrum allocated to mobile services has been unable to meet the requirements. In the 3GPP Rel-13 stage, a mechanism called LAA (Licensed-Assisted Access) was introduced. In the LAA mechanism, mobile communication transmission can be carried on unlicensed spectrum, such as the 5GHz frequency band. These unlicensed spectrums are mainly used by systems such as Wi-Fi, Bluetooth, radar, and medical. [0003] In the LAA system, in order to ensure fair sharing of unlicensed spectrum with other systems. A listen-before-talk (LBT) mechanism was introduced. That is to ...

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Problems solved by technology

[0010] However, there are corresponding problems in the above-mentioned solutions, specifically: the above-mentioned solution 1 will affect the coexistence of other systems on the unlicensed frequency band, because the solution 1 is relatively easy to occupy channels, it may cause problems when coexisting with other systems The problem of not being able to coexist fairly; in the case of scheme 2, since the channel environment of different terminals is different, it will lead to the problem that the multiplexing channel of the terminal cannot be realized for transmission, resulting in the reduction of spectrum efficiency; in the case of scheme 3, Since the terminal does not perform LBT before performing uplink transmission on the terminal side, it will also affect the coexistence with other systems

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