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Channel state information report method and device

A channel state information and reporting technology, which is applied in radio transmission systems, digital transmission systems, electrical components, etc., can solve problems such as inability to obtain CQI and inconsistency, and achieve improved throughput, improved demodulation performance, and accurate CSI feedback Effect

Inactive Publication Date: 2016-05-25
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assuming the same BPj, for horizontal PMI and vertical PMI at N j Select the best subband among the subbands, the selection result may be different, and the CQI must be obtained based on two PMIs, these two PMIs are different subbands, and the CQI of the matching subband will not be obtained

Method used

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  • Channel state information report method and device
  • Channel state information report method and device
  • Channel state information report method and device

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Embodiment Construction

[0123] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0124] The present invention mainly matches the frequency band of the PMI in the horizontal direction and the frequency band of the PMI in the vertical direction, so that the feedback CQI is consistent with the characteristics of the actual channel, thereby improving system performance.

[0125] Figure 5 It is a flowchart of a CSI reporting method according to an embodiment of the present invention. like Figure 5 shown, including the following steps:

[0126] Step 501: The UE obtains the configuration of the CSI report corresponding to the two-dimensional antenna configuration;

[0127] The configuration of the CSI report corresponding to the two-dimensional antenna configuration includes the CSI report mode, the number of CSIRS ports for eac...

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Abstract

The invention discloses a channel state information (CSI) report method comprising the following steps: first, UE acquires the configuration of CSI report corresponding to two-dimensional antenna configuration; then, the UE determines a CSI report method according to the configuration of CSI report; and finally, the UE reports CSI according to the CSI report method. The invention further provides a CSI report device. By applying the technical scheme disclosed by the invention, a CQI fed back by UE can be consistent with the characteristics of an actual channel, and the system performance is optimized.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and device for reporting channel state information in a multi-antenna wireless communication system. Background technique [0002] In the Long Term Evolution Advanced system (LTE-A, LongTermEvolutionAdvanced), the periodic channel state information report includes: Wideband (Wideband) CQI feedback type and UE Selected (UESelected) subband (Subband) CQI feedback type, as shown in Table 1. Which channel state information (CSI, ChannelStateInformation) feedback type to use specifically is configured by high-level signaling. The CSI includes a channel quality indicator (CQI, channelquality indicator), a precoding matrix indicator (PMI, PrecodingMatrixIndicator), a precoding type indicator (PTI, PrecodingTypeIndicator) and a rank indicator (RI, RankIndicator). [0003] Table 1: Periodic CQI and PMI feedback types [0004] [0005] For a UE configured with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04B7/0647H04B7/0456H04B7/0617H04B7/0619H04B7/0626H04B7/063H04B7/0632H04B7/0639
Inventor 付景兴李迎阳王轶
Owner BEIJING SAMSUNG TELECOM R&D CENT