Channel state information processing method, device and system

Abstract

The invention discloses a channel state information (CSI) processing method, a CSI processing device and a CSI processing system, wherein the CSI processing method includes the steps of configurating configuration signals for CSI-RS port subsets by a network side, and notifying user equipment (UE) of reference signals and the configuration signals; conducting channel measurement by the UE according to the reference signals, determining CSI according to results of the channel measurement; and reporting the CSI of every CSI-RS port subsets according to the configuration signals which are configurated by the network side on the CSI-RS port subsets. According to the CSI processing method, the CSI processing device and the CSI processing system, part of CSI-RS port subsets can utilize reciprocity of channels to determine PMI and RI, no PMI or RI need to be fed back, and only CQI needs to be fed back. Therefore, a communication system reduces CSI reporting expenses on the premise of guaranteeing service performance. According to the technical scheme, the CSI processing method, the CSI processing device and the CSI processing system are particularly suitable for a TDD system.

Description

technical field [0001] The invention relates to channel state information reporting and processing technology, in particular to a channel state information processing method, device and system. Background technique [0002] In wireless communication technology, when the base station side (e.g., evolved Node B, eNodeB, eNB for short) uses multiple antennas to transmit data, it can adopt spatial multiplexing to increase the data transmission rate, that is, use the same time-frequency Resources transmit different data at different antenna positions, and a receiving end (for example, user equipment (UE, User Equipment)) also uses multiple antennas to receive data. In the case of a single user, the resources of all antennas are allocated to the same user, and this user exclusively occupies the physical resources allocated to the base station side within a transmission interval. This transmission method is called single-user multiple-input multiple-output (SU-MIMO). , Single User...

AI Technical Summary

Problems solved by technology

Therefore, CQI cannot exist independently of RI and PMI

[0008] In the related art, during the CSI determination process of the UE, for different channel state information reference signal (CSI-RS, Channel State Information-Reference Signal) port subsets, it is impossible to control whether there is PMI / RI feedback, and the result cannot be based on the actual channel conditions. Choose to obtain PMI / RI through reciprocity or obtain PMI / RI through feedback, resulting in the inability to utilize the reciprocity of the Time Division Duplex (TDD, Time Division Duplexing) system and the inability to reduce the feedback overhead of the system

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