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Channel state information (CSI) measurement method and device

A technology of channel state information and measurement methods, applied in transmission path sub-channel allocation, wireless communication, signaling as a feature, etc., can solve problems such as time delay, transmitter bandwidth overhead, etc., to reduce time delay and reduce bandwidth overhead Effect

Active Publication Date: 2018-05-01
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the transmitter only needs to use CSI for indoor positioning, the receiver needs to join multiple WiFi networks in order to measure the CSI between multiple WiFi transmitters. This process of repeatedly joining and leaving the WiFi network, Causes additional bandwidth overhead and time delay when the transmitter performs positioning

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  • Channel state information (CSI) measurement method and device
  • Channel state information (CSI) measurement method and device
  • Channel state information (CSI) measurement method and device

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Embodiment Construction

[0084] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0085] It should be noted that the terms "system" and "network" are often used interchangeably herein. The term "and" in this article is just an association relationship describing associated objects, which means that there can be three kinds of relationships, for example, A and B, which can mean: A exists alone, A and B exist at the same time, and B exists alone. Condition. In addition, the character " / " in this article generally indicates that the contextual objects are an "or" relationship.

[0086] When the embodiments of the present invention refer to ordinal numerals such as "first", "second", "third" or "fourth", unless they really express the meaning of order...

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Abstract

The embodiment of the invention provides a channel state information (CSI) measurement method and device, relating to the technical field of communication, and aiming to ensure that a receiver can also measure CSI without joining a network of a WiFi transmitter. The method includes the following steps: a CSI request device sends a first CREQ frame, wherein the first CREQ frame is used for requesting a CSI response device that receives the first CREQ frame to determine a group of session parameters for transmitting a CS frame from at least one group of session parameters, and the CS frame is used by the CSI request device to perform channel state measurement; the CSI request device receives a CRSP frame sent by a first CSI response device, wherein the CRSP frame includes first session parameters, and the first session parameters are a group of session parameters in the at least one group of session parameters; the CSI request device receives the CS frame by using the first session parameters; and the CSI request device measures the CS frame to obtain the CSI. The method is applied in positioning scenes.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a channel state information (Channel State Information, CSI) measurement method and device. Background technique [0002] In the 802.11 standard, when a WiFi (wireless fidelity, wireless fidelity) transmitter performs transmit beamforming operations, it needs to obtain a multiple input multiple output (Multiple Input Multiple Output, MIMO) transmission channel from the WiFi transmitter to the receiver CSI. For example, in the explicit feedback mechanism, the WiFi transmitter sends a channel detection message to the receiver, and the receiver obtains the channel information of the channel where the WiFi transmitter sends the data message to the receiver after receiving the detection message. [0003] CSI, and then send the obtained CSI to the WiFi transmitter through the CSI feedback message, and then the WiFi transmitter calculates a beamforming steering matrix ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04L1/06H04L5/00
CPCH04B7/0626H04L1/0693H04L5/0048H04B7/06H04L1/06H04L5/00H04L25/0228H04L1/0026H04W72/0446H04W80/10H04L1/0061H04W24/10
Inventor 邢志浩
Owner HUAWEI TECH CO LTD
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