LTE transmission method and device on unlicensed spectrum

Abstract

Disclosed are an LTE transmission method and apparatus on an unlicensed spectrum so as to transmit a DRS and a PDSCH on a same subframe. The method comprises: monitoring an unlicensed spectrum on the basis of an LBT mechanism for sending a PDSCH; and when channel idle is monitored, the channel occupation time is superposed with the DMTC time of the DRS and a DRS sendable position is comprised in the superposed time, simultaneously sending the DRS and the PDSCH on a same subframe in the channel occupation time, the same subframe comprising the DRS sendable position. By executing embodiments of the present invention, a DRS and a PDSCH can be simultaneously sent on an unlicensed spectrum, so as to provide a user with better broadband experience, a higher speed, higher stability and better mobile convenience, and better coexistence with WiFi can be achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular to an LTE transmission method and device on an unlicensed frequency spectrum. Background technique [0002] With the rapid increase of communication traffic, the licensed spectrum of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) appears to be less and less enough 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 WiFi, Bluetooth, radar, medical and other systems. Generally, access technologies designed for licensed frequency bands, such as Long Term Evolution (LTE) technology, are not suitable for use in unlicensed frequency bands. Because access technologies such as LTE have very high requirements for spectrum e...

AI Technical Summary

Problems solved by technology

However, if LTE is used on the unlicensed frequency band without considering whether other devices are using the unlicensed frequency band, it will cause great interference to WiFi devices

Because in LTE technology, user equipment transmits as long as it has services, without any monitoring rules, and WiFi equipment cannot transmit when LTE services are transmitted, and can only detect the idle state of the channel and transmit after the LTE service transmission is completed.

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