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Channel state information (CSI) feedback method and user equipment

A technology for channel state information and user equipment, applied in the field of communication, can solve problems such as lack of channel state information feedback method, and achieve the effects of large system throughput, low signaling overhead, and simple implementation

Inactive Publication Date: 2014-09-10
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0080] The purpose of the present invention is to provide a novel channel state information feedback method and user equipment for the lack of a channel state information feedback method supporting JT and other transmissions in the prior art

Method used

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  • Channel state information (CSI) feedback method and user equipment
  • Channel state information (CSI) feedback method and user equipment
  • Channel state information (CSI) feedback method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0132] Scenario of the embodiment: examine user equipment 416 , make it work in multi-transmission point cooperation mode, its serving transmission point is transmission point 202 , and its non-serving transmission points are transmission points 200 and 204 . User equipment 416 may be a single antenna or a multi-antenna device.

[0133] Step S600: the user equipment acquires a set of CSI processes configured by a transmission point and participating in multi-antenna and multi-transmission point cooperation.

[0134] In this step, the user equipment generally needs to obtain the set of CSI processes participating in the multi-antenna multi-transmission point cooperation from the serving transmission point or other transmission points. As a non-limiting implementation of this step, the user equipment (eg, user equipment 416) may periodically report path loss information from the user equipment to adjacent transmission points to the serving transmission point (eg, serving transmi...

example 1

[0135] Example 1(a): The CSI process set configured by the serving transmission point 202 for the user equipment 416 includes 2 CSI processes, and the 2 CSI processes may be: (1) CSI process #1: port 0 to port 7 of the transmission point 202 , a total of 8 ports of CSI-RS-R and IMR for measuring signal strength except for the transmission point 202; (2) CSI process #2: port 0 to port 7 of the transmission point 200, a total of 8 ports of CSI-RS- R and IMR which measure signal strength other than the launch point 200.

[0136] Example 1(b): The CSI process set configured by the serving transmission point 202 for the user equipment 416 includes 3 CSI processes, which may be: (1) CSI process #1: port 0 to port 7 of the transmission point 202 , a total of 8 ports of CSI-RS-R and IMR for measuring signal strength except for the transmission point 202; (2) CSI process #2: port 0 to port 7 of the transmission point 200, a total of 8 ports of CSI-RS- R and IMR for measuring signal st...

example 2

[0148] Example 2(c): The CSI process set configured by the serving transmission point 202 for the user equipment 416 includes 3 CSI processes. For CSI process #1, no inheritance is configured. For CSI process #2, configure RI and subband inheritance with respect to CSI process #1. Then, the CSI process #1 becomes the RI reference process and the SB reference process of the CSI process #2, and the CSI process #2 becomes the RI dependent process and the SB dependent process (subband dependent process) of the CSI process #1. For CSI process #3, sub-band inheritance for CSI process #1 is set. Then, CSI process #1 becomes the SB reference process of CSI process #3, and CSI process #3 becomes the SB dependent process of CSI process #1.

[0149] Example 2(d): The CSI process set configured by the serving transmission point 202 for the user equipment 416 includes 3 CSI processes. For CSI process #1, no inheritance is configured. For CSI process #2, no inheritance is configured. F...

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Abstract

Provided in the present invention are a method and user equipment for channel state information feedback. The method comprises the following steps: the user equipment acquires a CSI process collection configured by a transmission point for participation in a multi-antenna multipoint transmission coordination; the user equipment acquires a sub-band (SB) inheritance configured by the transmission point with respect to CSI processes in the CSI process collection; the user equipment calculates CSI on the basis of a configuration with respect to the CSI process; and, the user equipment feeds back the CSI acquired by calculation to the transmission point. The present invention has the advantages of easy implementation and reduced overhead and is applicable in an enhanced 4G system and 5G system.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, to a channel state information feedback method in a multi-transmission point cooperation mode and user equipment applying the method. Background technique [0002] The modern wireless mobile communication system presents two notable features. One is high broadband speed. For example, the bandwidth of the fourth-generation wireless mobile communication system can reach 100MHz, and the downlink rate can reach as high as 1Gbps; , online navigation and other emerging businesses. These two characteristics put forward higher requirements for wireless mobile communication technology, mainly including: ultra-high-speed wireless transmission, inter-regional interference suppression, reliable signal transmission during movement, distributed / centralized signal processing, etc. In the future enhanced fourth-generation (4G) and fifth-generation (5G) wireless mobile commu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06
CPCH04B7/06H04B7/024H04B7/0417H04B7/0486H04B7/0626H04B7/0632
Inventor 丁铭刘仁茂
Owner SHARP KK