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Determination of channel measurement pilot indication signaling, csi feedback method and device

A technology for channel measurement pilot and indication signaling, applied in the field of communication, can solve problems such as high overhead and waste of resources

Active Publication Date: 2019-12-31
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The present invention provides a method and device for determining indication signaling of channel measurement pilots, a CSI feedback triggering method and device, and a CSI feedback method and device, so as to at least solve the problem of periodic transmission of CSI-RS in related technologies, which requires relatively large overhead. waste of resources

Method used

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  • Determination of channel measurement pilot indication signaling, csi feedback method and device
  • Determination of channel measurement pilot indication signaling, csi feedback method and device
  • Determination of channel measurement pilot indication signaling, csi feedback method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0110] Generally, different from the periodic CSI-RS, the aperiodic CSI-RS is only sent in a small number of one or several subframes. The position of the aperiodic CSI-RS transmission in the PRB pair can reuse the pattern of the periodic CSI-RS transmission in the prior art. The difference is that the periodic CSI-RS is pre-scheduled for full bandwidth transmission in the frequency domain and periodic transmission in the time domain. of. Aperiodic CSI-RS can be sent in full frequency domain bandwidth or non-full bandwidth, and is not periodic in time domain. It is only sent when necessary. Therefore, the location information of aperiodic CSI-RS sent by the base station needs to be dynamic notification to the terminal.

[0111] The base station triggers the aperiodic CSI-RS in the physical downlink control signaling, and includes some location information related to the aperiodic CSI-RS. Among them, it is better to use the following method to trigger the aperiodic CSI-RS:

...

Embodiment 2

[0141] The main purpose of the base station sending the CSI-RS is to hope that the terminal uses the CSI-RS for measurement. For aperiodic feedback, the base station needs to perform aperiodic CSI triggering.

[0142] The base station can trigger aperiodic CSI feedback in the DL Grant, so that the time interval between CSI-RS transmission and CSI feedback will be greatly shortened, reducing the resulting inaccuracy caused by channel changes in the time domain; Can save money.

[0143] When DL Grant triggers aperiodic feedback CSI feedback, various CSI processes (Process) can be predefined, and the bit states of the signaling are used to represent different meanings. CSI process1, triggers CSI process2, triggers CSI process3, etc.

[0144] Alternatively, the 8 states of 3bit can be used to indicate no triggering, triggering of CSI process1, triggering of CSI process2, triggering of CSI process3, triggering of CSI process4, triggering of CSI process5, triggering of CSI process...

Embodiment 3

[0151] The aperiodic CSI-RS transmission position is not limited to some patterns that have been defined so far. When the aperiodic CSI-RS is sent simultaneously with the PDSCH of the UE, the aperiodic CSI-RS may be in the dedicated transmission area of ​​the original data (Data) outside the pattern.

[0152] In this way, additional resources can be allocated without affecting the configuration of periodic CSI-RS, such as the following Figure 12 Middle black REs can also be used to transmit aperiodic CSI-RS.

[0153] From the above description, it can be seen that the present invention achieves the following technical effects:

[0154] The present invention determines the aperiodic CSI-RS through the aperiodic CSI-RS transmission resource configuration information, and then performs channel measurement through the aperiodic CSI-RS, which can solve the problem of periodic transmission of CSI-RS in the related technology, which has a large overhead and wastes resources. probl...

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Abstract

The present invention discloses a method and device for determining the indication signaling of the channel measurement pilot and CSI feedback, wherein the method for determining the indication signaling of the channel measurement pilot includes: the base station includes the aperiodic channel state information reference signal CSI The downlink control signaling of the ‑RS transmission resource configuration information is sent to the terminal, wherein the aperiodic CSI‑RS transmission resource configuration information is used to determine the position of the aperiodic CSI‑RS, and the aperiodic CSI‑RS is used to instruct the terminal to perform channel measurement. The present invention determines the aperiodic CSI-RS through the aperiodic CSI-RS transmission resource configuration information, and then performs channel measurement through the aperiodic CSI-RS, which can solve the problem of periodic transmission of CSI-RS in the related technology, which has a large overhead and wastes resources. problem, saving resources and reducing sending overhead.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for determining indication signaling of channel measurement pilots, a channel state information (Channel State Information, referred to as CSI) feedback triggering method and device, and a CSI feedback method and device . Background technique [0002] In a wireless communication system, the sending end and the receiving end use multiple antennas to obtain a higher rate by means of spatial multiplexing. The receiving end needs to measure the channel according to the pilot signal sent by the sending end, and feed back the channel information to the sending end. The sending end uses some transmit precoding techniques according to the obtained CSI to greatly improve the transmission performance. In the Long Term Evolution (LTE for short) system, channel information is obtained based on Cell Specific Reference Signals (CRS for short) or Channel State Information...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16
CPCH04W76/27H04W24/10H04W72/23H04L5/0048H04W88/02H04W88/08
Inventor 陈艺戬戴博李儒岳孙云锋郭森宝
Owner ZTE CORP
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