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CSI measurement method and device

A measurement method and technology for configuring information, applied in the field of communication, can solve the problems of decreased reception quality, waste of time-frequency resources, etc., and achieve the effect of convenient resource scheduling

Active Publication Date: 2020-10-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Channel aging will lead to a decline in the reception quality of the terminal receiving the physical downlink shared channel (PDSCH for short).
In order to avoid channel aging, a solution is to shorten the SRS transmission period, but this method will cause a waste of time-frequency resources

Method used

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Embodiment Construction

[0050] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Wherein, in the description of the present application, unless otherwise specified, " / " represents or means, for example, A / B may represent A or B. And, in the description of the present application, unless otherwise specified, "plurality" means two or more than two, and "at least one" means one or more.

[0051] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not necessarily limit the difference.

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Abstract

The invention provides a CSI measurement method and device. In the method, a terminal can send a first RS occupying a plurality of frequency domain resource segments on a time domain unit to a networkdevice, the plurality of frequency domain resource segments are discontinuously distributed on a frequency band of the terminal, and the network device receives the first RS on a corresponding frequency domain resource segment and measures CSI according to the first RS. At present, in order to avoid channel aging, one used method is to shorten the period of the SRS. However, because the frequencydomain resources occupied by the SRS are continuously distributed on the whole frequency band, the method may cause a waste of time-frequency resources. In the method disclosed by the invention, thefirst RS is discontinuously distributed on the frequency band of the terminal, so that the occupied time frequency resources are less. Therefore, the period of the first RS can be made shorter, thereby avoiding channel aging. The invention relates to the technical field of communication.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a channel state information (channel state information, CSI for short) measurement method and device. Background technique [0002] In the prior art, the terminal can send a sounding reference signal (sound reference signal, SRS for short) to the base station, so that the base station can obtain the uplink CSI through the received SRS, determine the downlink CSI according to the uplink CSI, and then determine the precoding matrix according to the downlink CSI, according to The precoding matrix precodes a physical downlink shared channel (PDSCH for short) and sends it to the terminal. [0003] In one case, the terminal can periodically transmit the SRS, assuming that the transmission period of the SRS is x milliseconds (ms), and the preparation time for the base station to transmit the PDSCH needs y ms, then as figure 1 As shown, the longest time interval b...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B17/309
CPCH04L5/0048H04L5/0094H04L5/0078H04L5/0007H04B17/309H04L5/0041H04L5/0023H04L5/001H04L5/0082H04W72/542H04W76/28H04L5/0051H04W72/0446H04W72/0453
Inventor 吴晔毕晓艳
Owner HUAWEI TECH CO LTD
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