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Method and equipment for transmitting channel information

A technology for channel information and equipment, applied in the field of acquiring channel information, can solve problems such as error transmission and computational overhead, and achieve the effect of avoiding unpacking errors and improving robustness

Inactive Publication Date: 2015-01-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method requires computational overhead; and item-by-item judgments are prone to error propagation

Method used

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  • Method and equipment for transmitting channel information
  • Method and equipment for transmitting channel information
  • Method and equipment for transmitting channel information

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Embodiment Construction

[0020] The embodiment of the present invention relates to a beamforming technology, which can be applied to a wireless local area network system, and the device using the beamforming technology can be an STA (Station). The STA includes but is not limited to: mobile phone terminals, laptop computers, AP (Access Point, access point) and so on. Wherein, when the STA uses the beamforming technology to send data, the STA may be referred to as a beamformer, and when the STA uses the beamforming technology to receive data, the STA may be referred to as a beam receiver beamformee.

[0021] The embodiments of the present invention can be applied to any wireless communication system that obtains the channel use right based on a competition method. For devices that compete to obtain the channel use right first, the channel may be preferentially used for data transmission. Among them, the channel use right obtained through competition can be called TXOP. After each device competes to obtain ...

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Abstract

The invention relates to the field of wireless communication, in particular to relate to a method and equipment for obtaining channel information. A method for issuing channel information provided by the embodiment of the invention comprises the steps that receiving ends receive a null data packet announcement (NDPA) sent by a sending end, wherein the NDPA comprises station number and station list information; and the station number is used for indicating the quantity of the receiving ends in the station list information; the receiving ends read the information in the station list information in order to decide whether information corresponding to the receiving ends is included or not, if the reading times of the receiving ends exceed the station number, the condition of finishing reading the station list information is decided; and if the station list information includes the information corresponding to the receiving ends, the receiving ends receive a null data packet (NDP) respectively, and further calculate the channel information according to the null data packets; and the channel information is sent to the sending end.

Description

Technical field [0001] The present invention relates to the field of wireless communication, and in particular to a method and equipment for acquiring channel information. Background technique [0002] In wireless communication systems, due to the application of MIMO (Multiple-Input Multiple-Out-put) technology and beamforming (beamforming) technology, channel information becomes more and more important. The beamformer obtains channel information by receiving feedback from the beamformee, and serves as a reference for subsequent data transmission. The beamformer obtains a TXOP (Transmit Opportunity, transmission opportunity) in a competitive manner before each data transmission, and then transmits the data within a time length corresponding to the TXOP. [0003] In the prior art, the process for the beamformer to obtain information is as follows: the beamformer sends NDPA (Null Data Packet Announcement) and NDP (Null Data Packet) to the beam receiver to request channel information...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/04H04B7/08
Inventor 杨讯李云波伍天宇华成燕
Owner HUAWEI TECH CO LTD
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