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Method, access point and station for transmitting channel state information

A technology for channel state information and state information, applied in the field of communication, can solve the problems of wasting resources, reducing the transmission efficiency of channel state information, and not supporting immediate feedback.

Active Publication Date: 2021-05-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, more STAs are introduced in the 802.11ax standard, and some STAs cannot provide immediate feedback. For example, STAs have limited capabilities and do not support immediate feedback or resources allocated by the AP are limited. In the above cases, STAs cannot immediately perform channel state information. Feedback, the AP may waste resources by waiting for a long time to receive channel state information, which in turn reduces the transmission efficiency of channel state information

Method used

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  • Method, access point and station for transmitting channel state information
  • Method, access point and station for transmitting channel state information
  • Method, access point and station for transmitting channel state information

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] Figure 1B is a schematic flowchart of a method for transmitting channel state information according to an embodiment of the present invention. Figure 1B The method can be executed by the site.

[0049] 101. The station STA receives a feedback indication message, an efficient long training sequence, and a first resource scheduling message sent by an access point AP. The feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP. The efficient long training sequence It is used to determine the first channel state information of the target STA, and the first resource scheduling message is used to indicate the first communication resource used by the target STA when giving feedback to the feedback indication message, the efficient long training sequence and the first resource scheduling message.

[0050] 102. When the STA parses the feedback indication message and determines that it belongs to the t...

Embodiment 2

[0087] figure 2 is a schematic flowchart of a method for transmitting channel state information according to another embodiment of the present invention. figure 2 The method can be performed by an access point.

[0088] 201. Send a feedback indication message, an efficient long training sequence, and a first resource scheduling message to a station STA, where the feedback indication message is used to indicate at least two target STAs that need to feed back channel state information, and the efficient long training sequence is used to determine the first resource scheduling message of the target STA. Channel state information, the first resource scheduling message is used to indicate the first communication resource used by the target STA when giving feedback to the feedback indication message, the efficient long training sequence and the first resource scheduling message.

[0089] 202. Receive an acknowledgment message sent by the target STA through the first communication...

Embodiment 3

[0104] image 3 It is a schematic flowchart of a method for transmitting channel state information according to another embodiment of the present invention. image 3 The method can be executed by the site.

[0105] 301. Receive a first resource scheduling message, a first feedback indication message, and a first efficient long training sequence sent by an access point AP according to first indication information, where the first feedback indication message is used to indicate that channel state information needs to be fed back to the AP At least two target station STAs, the first resource scheduling message or the first feedback indication message includes the first indication information, the first indication information is used to indicate whether the target STA immediately feeds back the channel state information, and the first high-efficiency long training sequence is used to determine The first channel state information of the target STA, the first resource scheduling me...

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Abstract

Embodiments of the present invention provide a method for transmitting channel state information, an access point and a station. The method includes that the station receives the feedback indication message, the high-efficiency long training sequence and the resource scheduling message sent by the access point, and when it is determined that it belongs to the target station, feeds back a confirmation message to the access point through the communication resource indicated by the resource scheduling message. The feedback indication message is used to indicate at least two target STAs that need to feed back channel state information to the AP, and the efficient long training sequence is used to determine the channel state information of the STAs. In the embodiment of the present invention, by feeding back the confirmation message to the access point, the resource waste caused when some stations do not support immediate feedback can be avoided, and the transmission efficiency of the channel state information can be improved.

Description

technical field [0001] The present invention relates to the communication field, and more particularly, to a method, an access point and a station for transmitting channel state information. Background technique [0002] At present, a multiuser transmission (MU-MIMO, Multiuser Multiple Input Multiple Output) technology is known. MU-MIMO utilizes a spatial dimension to implement multiple user transmission through multiple parallel channels. However, this method requires the sending end or the receiving end to have all or part of the channel state information, otherwise the receiving end cannot correctly demodulate multiple effective signals, resulting in transmission failure. [0003] With the development of wireless local area network (WLAN, Wireless LAN) technology, it is hoped that MU-MIMO technology can be applied to WLAN networks. In order to simultaneously schedule multiple users for channel state information feedback, when the station (Station, STA) capability is limit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/00
CPCH04W24/10H04W84/12H04B7/0452H04B7/0626H04W72/12H04B7/0413H04L1/0026H04W24/00H04L1/1607H04L1/0073
Inventor 于健杨讯淦明林梅露彼得·禄
Owner HUAWEI TECH CO LTD