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Channel information feedback method and device

A channel information and channel measurement technology, applied in the field of communication, can solve the problems of ineffective correspondence to multiple paths, inaccurate selection, etc.

Active Publication Date: 2018-04-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a channel information feedback method and device to at least solve the problem of multiple beam selection or multiple codes when channel information is fed back in related technologies When selecting a word, it cannot effectively correspond to multiple paths, resulting in the problem of inaccurate selection

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specific Embodiment 1

[0138] In this embodiment, the receiving end may be a terminal, which measures channel information and feeds it back to the base station. The specific steps are as follows:

[0139] Step 10: Determine a channel measurement resource set, the resource set includes M resources, where the M channel measurement resources can be time domain resources, frequency domain resources, port resources, sequence resources or any combination of the above resources ,Such as Figure 8 , Figure 9 , Figure 10 , Figure 11 As shown, preferably: time domain + frequency domain resources, time domain + code domain resources, ports + time domain resources, ports + frequency domain resources.

[0140] It can also be a combination of more dimensional resource types (for example: time domain + frequency domain + port resources), such as Figure 12 shown.

[0141] Beams can be bound to channel measurement resources; for example, channel measurement resources 1 to 16 correspond to beam IDs 1 to 16, ...

specific Embodiment 2

[0156] This specific embodiment mainly describes how to limit resource selection according to resource selection constraints:

[0157] Preferably, the receiving end divides the M channel measurement resources into X resource groups, and the X resource groups can be divided according to the following rules:

[0158] Such as Figure 13 As shown, multiple resources corresponding to the same port are divided into one group.

[0159] Such as Figure 14 As shown, multiple resources included in the same time domain resource unit are divided into one group; the domain resource unit may be: symbol (group), time slot (group), subframe (group), TTI (group).

[0160] Such as Figure 15 As shown in , multiple resources included in the same frequency domain resource unit are divided into one group.

[0161] Similar to the above, multiple resources included in the same RB may also be divided into one group; or multiple resources corresponding to the same sequence may be divided into one ...

specific Embodiment 3

[0163] This specific embodiment mainly describes the limitation of resource selection according to resource selection restriction conditions;

[0164] The following conditions can be used to limit the selection of multiple resources, for example:

[0165] At least N of N resources a resources belong to different time-domain resource units, wherein Na is an integer greater than or equal to 2 and less than or equal to N; the time-domain resource unit can be: symbol (group), time slot (group), subframe (group), TTI ( group), etc.

[0166] In this specific implementation, it is not possible that all N resources belong to the same time-domain resource unit. At this time, the beams sent in the same time-domain resource may be adjacent beams; The measurement resource of the domain resource unit is selected, and Na greater than or equal to 2 means that it will correspond to beams of different paths at this time.

[0167] At least N of N resources b resources corresponding to diffe...

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Abstract

The invention provides a channel information feedback method and device. The method comprises the following steps: determining a channel measurement resource set, wherein the channel measurement resource set comprises M channel measurement resources, and M is a positive integer; carrying out channel measurement on the M channel measurement resources; selecting N channel measurement resources fromthe M channel measurement resources according to a channel measurement result, wherein N is a positive integer and is smaller than or equal to M; and sending feedback on indication information of theselected N channel measurement resources. The method and device provided by the invention has the advantages that the problem in the relevant art that low system robustness and low transmission efficiency are caused because multiple corresponding routes cannot be obtained in the channel measurement resource selection technology, so that the multiple corresponding routes can be obtained during channel measurement resource selection, and the effects of higher system robustness and higher transmission efficiency are further achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel information feedback method and device. Background technique [0002] In a wireless communication system, the transmitting end and the receiving end generally use multiple antennas to transmit and receive to obtain a higher rate. One principle of multi-antenna technology is to use some characteristics of the channel to perform precoding beamforming to form a transmission that matches the characteristics of the channel. The radiation direction of the signal is very targeted, which can effectively improve the performance of the system without increasing the bandwidth and power. Significant performance improvements have been obtained on the basis of , and are widely used in current systems. Such as figure 1 The precoding beamforming technology is shown. In essence, precoding and beamforming are the same technology. The effect of precoding is to form beams. Precoding can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0626H04B7/063H04B7/0632H04B7/0639H04W24/10H04W72/04
Inventor 陈艺戬吴昊鲁照华张楠李儒岳
Owner ZTE CORP
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