Communication method and device for FDD system based on flexible duplex, base station and terminal

Abstract

The invention provides a communication method and device for an FDD system based on flexible duplex, a base station and a terminal. The communication method for the FDD system based on flexible duplex is used for the base station, and comprises the following steps: detecting the types of interference of neighboring cells on flexible subframes of uplink frequency spectrum of a target cell; according to the detection result, dividing the flexible subframes of the uplink frequency spectrum into at least one subframe set; and notifying the terminal to report CQI of each subframe set in the at least one subframe set. According to the technical scheme, accurate reporting of the CQI of each flexible subframe in the period can be ensured, and meanwhile, CQI report cost is effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular, to a communication method based on a flexible duplex FDD system, a communication device, a base station and a terminal. Background technique [0002] Currently, the 5th generation mobile communication system (5G) is being researched in academia and industry. Among them, Ultra-Dense Network (UDN) is an important technology of 5G. UDN refers to the ultra-intensive networking for some scenarios with large data demand and many data connections (such as sports stadiums, railway station waiting halls, office places, etc.) during network deployment, and the connection between access sites The interval may be only tens of meters. A technology that may be used in UDN scenarios is Flexible Duplex, that is, according to service requirements, downlink services are carried on certain subframes of the uplink spectrum in the FDD (Frequency Division Duplexing, frequency division du...

AI Technical Summary

Problems solved by technology

It can be seen that, because in the flexible subframe 0 / 1 / 2 / 3, the terminals in cell 1 suffer from different types of interference, the interference levels they suffer may also be quite different

[0004] In related technologies, when reporting the CQI (Channel Quality Indicator, channel quality information) of a flexible subframe, if the reporting period is relatively large, such as reporting the CQI once every 10 ms, due to the different interference conditions of each flexible subframe, a single It is difficult for the secondary CQI to accurately reflect the CQI of different flexible subframes within the reporting period, but if a CQI is reported for each flexible subframe, there will be a large CQI reporting overhead

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