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Method and device for carrying out feedback and reception of channel state information (CSI)

A technology of channel state information and state information, which is applied in the direction of transmission path sub-channel allocation, signaling allocation, and signaling features, and can solve the problem of not supporting location information and CSI reporting to the base station, not supporting the reporting method, and unfavorable Issues such as base station downlink scheduling and transmission, to achieve the effect of improving detection performance

Active Publication Date: 2016-04-06
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the existing solutions, it does not support the method of reporting location information and CSI to the base station through different feedback methods, nor does it support the reporting method of the base station triggering the UE to feed back the CSI of the specified CSI feedback configuration through trigger signaling, which is not conducive to the base station More flexible downlink scheduling and transmission

Method used

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  • Method and device for carrying out feedback and reception of channel state information (CSI)
  • Method and device for carrying out feedback and reception of channel state information (CSI)
  • Method and device for carrying out feedback and reception of channel state information (CSI)

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Embodiment 1

[0150] In the embodiment of the present invention, the aperiodic CSI feedback trigger command trigger mode is adopted. According to the aperiodic CSI feedback trigger command sent by the base station, the UE first reports the location information of the CSI feedback configuration, and then performs CSI measurement based on the CSI feedback configuration corresponding to the reported location information. , the next time a non-periodic CSI feedback trigger command is received, report the CSI corresponding to the location information, and the specific steps are as follows:

[0151] 1) The base station instructs the UE to use a CSI process for aperiodic CSI feedback through high-layer signaling. Wherein, the CSI process includes four CSI-RS resource configurations and one IMR configuration.

[0152] 2) In subframe n, the base station triggers the UE to perform aperiodic CSI feedback through the downlink DCI, so that the UE feeds back the location information of the optimal CSI-RS...

Embodiment 2

[0158] In the embodiment of the present invention, the aperiodic CSI feedback trigger command trigger method is adopted, and the UE uses the periodic reporting method to report the position information of the CSI feedback configuration at a fixed position in each subframe, and then performs CSI measurement on the CSI feedback configuration corresponding to the reported position information , receiving the aperiodic CSI feedback trigger command sent by the base station, and reporting the CSI corresponding to the location information, the specific steps are as follows:

[0159] 1) The base station instructs the UE to use the CSI process for aperiodic CSI feedback through high-layer signaling. Wherein, one CSI process includes four CSI-RS resource configurations and one IMR configuration.

[0160] 2) In subframe n, the UE reports to the base station the index of the optimal CSI-RS resource configuration in all configurations among the CSI-RS resource configurations included in th...

Embodiment 3

[0165] In the embodiment of the present invention, the aperiodic CSI feedback trigger command trigger mode is adopted. The UE determines the CSI feedback configuration indicated by the base station for CSI feedback according to the aperiodic CSI feedback trigger command sent by the base station, and then based on the location information indicated by the base station. The feedback configuration performs CSI measurement, and reports the CSI corresponding to the location information after the measurement is completed. The specific steps are as follows:

[0166] 1) The base station instructs the UE the CSI process group used for aperiodic CSI feedback through high-layer signaling. Wherein, the CSI process group includes four CSI processes, and each CSI process includes a CSI-RS resource configuration and an IMR configuration.

[0167] 2) In subframe n, the base station triggers the UE to perform aperiodic CSI feedback through the downlink DCI; in the trigger signaling, the base s...

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Abstract

The present invention provides a method and device for carrying out feedback and reception of channel state information (CSI). The method for carrying out feedback of CSI by UE comprises a step of determining at least one CSI feedback configuration group configured by a base station according to the instruction of the base station, wherein each CSI feedback configuration group comprises at least one CSI feedback configuration, a step of reporting the CSI obtained based on a first CSI feedback configuration to the base station through a PUCCH or PUSCH when the need of CSI reporting is determined, wherein the CSI feedback configuration is determined by the UE from a corresponding CSI feedback configuration group according to the position information of a recently reported CSI feedback configuration or the position information of the CSI feedback configuration indicated by the base station. The independent reporting of the position information and the corresponding CSI is supported, thus the detection performance of the information is improved, the acquisition of the corresponding CSI of specified CSI feedback configuration by the base station is also supported, and the flexible downlink scheduling and transmission are carried out.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for feeding back and receiving channel state information (CSI). Background technique [0002] In existing cellular systems, base station antenna arrays are generally arranged horizontally, such as figure 1 with figure 2 shown. The beam at the transmitter of the base station can only be adjusted in the horizontal direction, but has a fixed downtilt angle in the vertical direction. Therefore, various beamforming / precoding techniques are based on channel information in the horizontal direction. In fact, since the wireless signal propagates three-dimensionally in space, the method of fixing the downtilt angle cannot make the performance of the system optimal. Beam adjustment in the vertical direction is of great significance for reducing inter-cell interference and improving system performance. [0003] With the development of antenna t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L5/00H04B7/04
CPCH04B7/0417H04L1/0026H04L5/0057H04L1/00H04L1/0027H04B7/0626H04B7/0639H04B7/0645
Inventor 陈文洪陈山枝高秋彬陈润华拉盖施李辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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