Preset spectrum resource detection and occupation method and communication equipment

Abstract

The present invention relates to a preset frequency spectrum resource acquisition method, the method comprising: a communication device starts to execute clear channel assessment (CCA) on a shared channel in preset frequency spectrum resources at the start point of the CCA window of the subframe N in an LTE system; during CCA, before the counting time of the CCA of the communication device, the communication device assesses that the shared channel is occupied; alternatively, when the CCA execution time reaches the counting time of the CCA assessment of the communication device, ending the assessment of the clear state of the shared channel; if the time that the communication device executes CCA in the CCA window of the subframe N in the LTE system is equal to the counting time of the CCA of the communication device, then determining that the shared channel is clear, and transmitting in the shared channel the data required to be transmitted. An embodiment of the present invention ensures equal opportunity for each device to use the channel, and reduces channel occupation conflict.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for acquiring preset frequency spectrum resources and a communication device. Background technique [0002] Since there are no restrictions on the use of wireless communication systems and operators on the unlicensed (Unlicensed) spectrum, one of the feasible solutions for the long-term evolution technology (LTE) system to use the unlicensed spectrum is to use the unlicensed spectrum as the secondary cell (Scell) spectrum resource of the LTE base station . However, since the unlicensed spectrum has no restrictions on the use of wireless communication systems and operators, there are situations where multiple operators of various communication systems want to occupy the same frequency spectrum. In the prior art, the wireless communication system needs to use the Listen-Before-Talk (LBT) rule when occupying the unlicensed spectrum for communication, that is, the node fir...

AI Technical Summary

Problems solved by technology

[0005] Time synchronization between multiple communication devices when communication devices occupy and release unlicensed spectrum channel resources according to the Frame based equipment listen-before-talk mechanism and simultaneously transmit and receive data according to the frame scheduling structure In this case, each communication device listens to the channel idleness and tries to occupy the channel before data transmission, which causes a high probability of conflicts between the communication devices occupying the channel

At the same time, because the time for the communication device to listen to the channel is related to whether other devices occupy the channel and the "fixed frame time" of the device, the chances of each device occupying the channel are not equal.

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