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Feedback method and device for channel state information report

A technology for channel state information and reporting, applied in the field of communication, can solve the problem of high signaling overhead

Active Publication Date: 2018-04-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the relatively large signaling overhead of the CSI feedback method in the related art, the present invention provides a CSI feedback method and device to at least solve this problem

Method used

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  • Feedback method and device for channel state information report
  • Feedback method and device for channel state information report

Examples

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Comparison scheme
Effect test

Embodiment 1

[0161] This preferred embodiment provides a signaling method for configuring aperiodic feedback, which can improve the flexibility of aperiodic feedback in multiple cells, reduce feedback overhead, and improve system performance. Figure 7 is a flowchart of aperiodic feedback of multi-cell CSI according to an embodiment of the present invention, such as Figure 7 As shown, the method includes the following steps S702 and S708:

[0162] Step S702: The base station can configure multiple groups of CSI reports and notify the UE of the configuration parameters of each group through high-level signaling, wherein the configuration parameters of each group of CSI reports include resource configuration information of CSI-RS resources used for channel measurement and at least one of the following:

[0163] Allocation information of one or more interference measurement resources corresponding to each CSI-RS resource;

[0164] and information indicating a correspondence between CSI-RS ...

Embodiment 2

[0186] This preferred embodiment provides a configuration signaling method for aperiodic feedback, Figure 8 It shows that the base station configures three CSI-RS resources to be measured and two interference measurement resources for the UE.

[0187] In this embodiment, the base station configures three CSI-RS resources 1, 2 and 3 to be measured for the UE through high-level signaling, and notifies two interference measurement resources 1 and 2 at the same time. The configuration parameters include each CSI-RS resource The number of ports, CSI-RS configuration, subframe period and offset of CSI-RS, and the power ratio Pc of data RE, etc., also include the bit sequence indicating the position of the interference measurement resource in the RB, the subframe period of the interference resource and offset etc. In addition, the base station side uses 3 bits among multiple bits, for example, 3 bits s1, s2, s3 among 8 bits [s1 s2 s3 s4 s5 s6 s7 s8] indicate, or only 3 bits [s1 s2s...

Embodiment 3

[0194] This preferred embodiment provides a configuration signaling method for aperiodic feedback, Figure 8 It shows that the base station configures three CSI-RS resources to be measured and two interference measurement resources for the UE.

[0195] In this embodiment, the difference from the preferred embodiment 2 is that in the configuration of bit indication of each CSI request field, the corresponding relationship between [s1 s2 s3] and [n1 n2 n3] is notified by high-level signaling or predefined , so there is no need to notify [n1 n2 n3] to indicate the corresponding relationship between UE [s1 s2 s3] and [n1 n2 n3].

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Abstract

The present invention discloses a channel state information report feedback method and device, wherein one method includes: the base station configures multiple sets of CSI report parameters, wherein each set of CSI report parameters in the multiple sets of CSI reports includes one or more parameters used for channel measurement Resource configuration parameters of multiple CSI-RS resources and at least one of the following: allocation information of one or more interference measurement resources corresponding to each CSI-RS resource in one or more CSI-RS resources; used to indicate one or more Parameters of the corresponding relationship between CSI-RS resources and interference measurement resources, used to indicate the parameters of the corresponding relationship between CSI-RS resources and CSI-RS resources used for interference calculation, and / or used to indicate one or more The parameters of the corresponding relationship between CSI-RS resources and the constituent carriers in the carrier aggregation; the base station notifies the UE of the parameters of multiple sets of CSI reports, and instructs the UE to feed back a predetermined set of CSI reports.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a feedback method and device for channel state information (Channel State Information, CSI for short) report. Background technique [0002] In order to improve the data throughput of edge users who suffer from large inter-cell interference in the cellular network, the Cooperate Multiple Point (CoMP) technology is proposed in the study of the Long Term Evolution (LTE) system. The CoMP technology includes Joint Transmission (JT), that is, multiple transmitting nodes (TP) transmit data for the user equipment (UE) on the same time-frequency resource through space cooperation to increase signal power while reducing interference and improve UE performance. Receive Signal-to-Interference-to-Noise Ratio (SINR) to improve user performance at the cell edge. [0003] The UE side usually needs to measure the channel state information (Channel State Information, CSI) of each cooperative TP...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16
Inventor 郑勇孙云锋贺海港任敏
Owner ZTE CORP
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