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Method and apparatus for determining instruction signaling of channel measurement pilot frequency, and channel state information feedback method and apparatus

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

Active Publication Date: 2014-09-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 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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  • Method and apparatus for determining instruction signaling of channel measurement pilot frequency, and channel state information feedback method and apparatus
  • Method and apparatus for determining instruction signaling of channel measurement pilot frequency, and channel state information feedback method and apparatus
  • Method and apparatus for determining instruction signaling of channel measurement pilot frequency, and channel state information feedback method and apparatus

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Embodiment 1

[0109] 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 the full frequency domain or in non-full bandwidth, and is not periodic in the time domain. It is only sent when necessary. Therefore, the location information of the aperiodic CSI-RS sent by the base station needs to be dynamic. notification to the terminal.

[0110] 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-...

Embodiment 2

[0139] 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.

[0140] 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.

[0141] 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.

[0142] Alternatively, 8 states of 3bit can be used to indicate not triggering, triggering CSI process1, triggering CSI process2, triggering CSI process3, triggering CSI process4, triggering CSI process5, triggering CSI process6, triggering CSI pro...

Embodiment 3

[0149] 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 can be in the dedicated transmission area of ​​the original data (Data) outside the pattern.

[0150] 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.

[0151] From the above description, it can be seen that the present invention achieves the following technical effects:

[0152] 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

Disclosed are a determination method and device for the instruction signaling of a channel measurement pilot frequency and a CSI feedback method and device. The determination method for the instruction signaling of a channel measurement pilot frequency comprises: a base station sends to a terminal a downlink control signaling comprising the transmission resource configuration information of a non-periodic channel state information reference signal (CSI-RS), said information being used to determine the position of the non-periodic CSI-RS, and the non-periodic CSI-RS being used to instruct the terminal to perform channel measurement. The present invention determines the non-periodic CSI-RS using the transmission resource configuration information of the non-periodic CSI-RS, and uses the non-periodic CSI-RS to perform channel measurement, thereby solving the problem in the prior art that periodic CSI-RS transmissions have high cost and waste resources, conserving resources, and reducing transmission costs.

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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IPC IPC(8): H04L1/00H04L1/16
CPCH04W24/10H04W76/27H04W72/23H04L5/0048H04W88/02H04W88/08
Inventor 陈艺戬戴博李儒岳孙云锋郭森宝
Owner ZTE CORP
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