Channel detection method of unauthorized frequency band and network cell equipment

Abstract

The embodiment of the invention discloses a channel detection method of an unauthorized frequency band and network cell equipment, which are used for reducing the detection collision and achieving coexistence in justice among LAA cells of different operators. The method provided by the embodiment of the invention comprises the following steps that the network cell equipment detects that whether the channel of the unauthorized frequency band is idle or not in the CCA detection time frame during target channel idle estimation, wherein the target CCA detection time frame is contained in a CCA detection time window which at least comprises N CCA detection time frames, and at least two different operators use the different CCA detection time frame in the N CCA detection time frames; when the detected channel is idle, the network cell equipment performs data transmission based on the idle channel.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a channel detection method and network element equipment in an unlicensed frequency band. Background technique [0002] With the rapid increase of communication traffic, the 3rd Generation Partnership Project (the 3rd Generation Partnership Project, referred to as 3GPP) licensed frequency bands are increasingly insufficient to provide higher network capacity, and how to use the licensed frequency bands Unauthorized frequency bands have become one of the key topics of discussion in 3GPP at present, such as 2.4GHz and 5GHz frequency bands. At present, it is mainly used by WiFi, Bluetooth, radar, medical and other systems. Access technologies designed for licensed frequency bands, such as Long Term Evolution (LTE for short), have very high requirements for frequency band efficiency and user experience optimization, and are not suitable for use in unlicensed frequency bands. ...

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Problems solved by technology

[0008] However, if the CCA time of the operator is staggered and occurs periodically, it is easy to cause the LAA cell of operator A to occupy the channel all the time, while the LAA cell of operator B cannot occupy the channel all the time. delay and unfairness

like Figure 4 As shown, because the cell of operator 1 detects the channel at the front, it will occupy the channel when it detects that the channel is idle, while operator 2 always detects the channel at the back, and at this time the channel is already occupied by operator 1, so operator 2 will be long The channel cannot be preempted in time, resulting in large delay and unfairness

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