A channel detection method and network element equipment in an unlicensed frequency band

Abstract

Disclosed in the present invention are an unlicensed frequency band channel detection method and network element device, configured to reduce detection collision and realize fair sharing between LAA cells of different operators. The method embodiment of the present invention comprises: detecting, by a network element device, whether a channel in an unlicensed frequency band is idle during a target clear channel assessment (CCA) detection period, wherein the target CCA detection period is contained in a CCA detection time window at least comprising N CCA detection periods, and at least two different operators use different CCA detection periods in the N CCA detection periods; if the channel is detected to be idle, transmitting, by the network element device, data 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. Furthermore, how to use unlicensed frequency bands with the help of licensed frequency bands Authorized frequency bands have become one of the key discussion topics of 3GPP at present, and unlicensed frequency bands 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...

AI Technical Summary

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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