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Method and apparatus for channel measurement

A channel measurement and channel technology, which is applied to the separation device of the transmission path, the sub-channel allocation of the transmission path, and the allocation of pilot signals, which can solve problems such as lack of flexibility.

Active Publication Date: 2022-07-22
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

[0003] Specifically, the network device can estimate the delay of the uplink channel through uplink sounding reference signals (sounding reference signals, SRS), wherein, the SRSs are distributed at equal intervals in the frequency domain, and the maximum delay of the uplink channel that the network device can estimate is different from the SRS The frequency domain interval of the frequency domain satisfies a certain relationship. The current agreement stipulates that the frequency domain density of the SRS sent by the terminal device in the uplink channel is 2 or 4 subcarriers per SRS. However, the configuration method of the SRS frequency domain density lacks flexibility.

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  • Method and apparatus for channel measurement

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Embodiment Construction

[0094] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0095] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access , WiMAX) communication system, fifth generation (5th generation, 5G) system or new radio (new radio, NR), etc. The 5G mobile communication system described in this application includes non-standalone (NSA) 5G mobile communication system or 5G mobile communication system of standalone (SA). The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The communication system may also be a public land mobile network (PLMN) network, a device-to-device (D2D) communication system, a machin...

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Abstract

The present application provides a method and apparatus for channel measurement. The method includes: a terminal device determines a frequency domain density of a sounding reference signal SRS based on a preset correspondence relationship, where the preset correspondence relationship includes a cyclic prefix CP related parameter and the frequency of the SRS. The corresponding relationship between the domain densities, the CP related parameters are known by the terminal device, the terminal device can determine the frequency domain density of the SRS based on the preset CP related parameters, and the terminal device sends the SRS to the network device. The frequency domain of the SRS The density is the frequency domain density of the determined SRS, and the SRS is used for uplink channel estimation. In this method, the terminal device determines the frequency domain density of the SRS sent to the network device based on the CP related parameters, and different CP related parameters can correspond to different SRS frequency domain densities, thereby improving the flexibility of configuring the SRS frequency domain density.

Description

technical field [0001] The present application relates to the field of wireless communication, and more particularly, to a method and apparatus for channel measurement. Background technique [0002] The 5th generation (5G) communication system has higher requirements on system performance such as system capacity and spectral efficiency, while the frequency division duplexing (FDD) large-scale multiple-input multiple-output (massive multiple-output) is restricted. A major bottleneck of the system capacity, spectral efficiency, and other performance of the input multiple-output, Massive MIMO) communication system is the acquisition of downlink channel state information (CSI). In FDD mode, the frequency band interval of the uplink and downlink channels is much larger than the coherence bandwidth. The uplink and downlink channels do not have complete reciprocity, but only partial reciprocity. For example, it has angle reciprocity and delay reciprocity, which can be These recipr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04B17/336H04L27/26H04L5/00
CPCH04B17/309H04B17/336H04L27/2678H04L5/001H04L5/0048
Inventor 范利葛士斌金黄平尹海帆种稚萌毕晓艳
Owner HUAWEI TECH CO LTD