Check patentability & draft patents in minutes with Patsnap Eureka AI!

Channel measuring information feedback method and STA (station)

A technology of channel measurement and information feedback, which is applied in the direction of using the return channel for error prevention/detection, wireless communication, electrical components, etc., and can solve the problems of inaccurate feedback of channel measurement information and affecting system performance, etc.

Inactive Publication Date: 2013-03-27
ZTE CORP
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the scenario where the channel feedback type is in the form of MU, the protocol has the following provisions: "If the feedback type is set to MU, in the feedback sent by the STA, the value of the Nc field in the VHT MIMO Control field carried must be equal to the STA information carried by NDPA The value of the Nc field in ", it can be seen that the above provisions are based on the assumption that the value of the Nc field in the STA information carried by NDPA is not greater than the current actual number of receiving antennas of this STA. However, there is such a problem, if because For some reason, for example, the STA currently has a problem with a receiving antenna and cannot work normally, and the STA has not notified the AP in time, and the AP still sets the value of the Nc field of the STA in NDPA according to the previously obtained information, which may occur The value of the Nc field in the STA information carried by NDPA is greater than the actual number of receiving antennas of the STA. However, it has not been proposed that the value of the Nc field in the STA information carried by NDPA is greater than the actual number of receiving antennas of the STA. The solution of how STA performs feedback operation, so that channel measurement information cannot be accurately fed back, which affects system performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Channel measuring information feedback method and STA (station)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, it is assumed that there is one AP and N STAs in the current WLAN, where N is a positive integer, and the STAs are respectively called STA1, ..., STAN; this WLAN supports downlink MU-MIMO transmission.

[0048] Under the above assumptions, if the AP needs to perform channel measurement before sending data to multiple STAs within its coverage area, then the AP will send NDPA frames and NDP frames, where the NDPA frames carry the indication information of multiple STAs, Assuming that NDPA carries the indication information of two STAs, which are the indication information of STA1 and STA2 respectively, the specific indication information for STA1 is: the identifier of STA1, the feedback type is MU, and the value of the Nc field is 4; the specific indication information for STA2 The information is: the identifier of STA2, the feedback type is MU, and the value of the Nc field is 2; the AP sends the NDP frame after the Short Interframe Space (SIFS) after ...

Embodiment 2

[0052] In this embodiment, it is assumed that there is one AP and N STAs in the current WLAN, where N is a positive integer, and the STAs are respectively called STA1, ..., STAN; this WLAN supports downlink MU-MIMO transmission.

[0053] Under the above assumptions, if the AP needs to perform channel measurement before sending data to multiple STAs within its coverage, the AP will send NDPA frames and NDP frames, where the NDPA frames carry the indication information of multiple STAs. Assuming NDPA Carry the indication information of two STAs in , which are the indication information of STA1 and STA2 respectively. The specific indication information for STA1 is: the identifier of STA1, the feedback type is MU and the value of the Nc field is 4; the specific indication information for STA2 is : The identifier of STA2, the feedback type is MU, and the value of the Nc field is 2; the AP sends the NDP frame after the SIFS interval after sending the NDPA. According to the current pr...

Embodiment 3

[0057] In this embodiment, it is assumed that there is one AP and N STAs in the current WLAN, where N is a positive integer, and the STAs are respectively called STA1, ..., STAN; this WLAN supports downlink MU-MIMO transmission.

[0058] Under the above assumptions, if the AP needs to perform channel measurement before sending data to multiple STAs within its coverage, the AP will send NDPA frames and NDP frames, where the NDPA frames carry the indication information of multiple STAs. Assuming NDPA Carry the indication information of two STAs in , which are the indication information of STA1 and STA2 respectively. The specific indication information for STA1 is: the identifier of STA1, the feedback type is MU and the value of the Nc field is 4; the specific indication information for STA2 is : The identifier of STA2, the feedback type is MU, and the value of the Nc field is 2; the AP sends the NDP frame after the SIFS interval after sending the NDPA. According to the current pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a channel measuring information feedback method. The method includes: when the dimension of channel measurement information which needs to be fed back and instructed by channel measurement requesting information received by an STA is larger than the number of actual receiving antennas of the STA, channel measurement feedback information is transmitted by the STA to an AP (access point), the column number of a feedback matrix formed by compressed beams carried in the channel measurement feedback information transmitted by the STA is identical to the number of the actual receiving antennas of the STA, or the column number of the feedback matrix formed by compressed beams carried in the channel measurement feedback information transmitted by the STA is identical to the dimension value of the channel measurement information which needs to be fed back and instructed by channel the measurement requesting information received by the STA, or the STA transmits empty channel measurement feedback information. The invention correspondingly discloses the STA. Via the channel measuring information feedback method and the STA, channel measurement information can be accurately fed back, and performance of a system can be improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a channel measurement information feedback method and a station (Station, STA). Background technique [0002] At present, in the wireless network field, the wireless local area network (WLAN) develops rapidly, the requirement for WLAN coverage is increasing day by day, and the requirement for throughput is also getting higher and higher. The Institute of Electrical and Electronics Engineers industry standard IEEE802.11 has defined a series of the most common WLAN technical standards such as 802.11a, 802.11b, and 802.11g, and then other task groups have emerged one after another, dedicated to the development of existing 802.11 Specifications for technical improvements, for example, the 802.11n task group proposed high throughput (High throughput, HT) requirements, introduced multiple-input multiple-output (MIMO) and beamforming technology, and supported data rates up to 600Mb...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L1/16H04W24/00
Inventor 田开波姜静吕开颖邢卫民江岸明
Owner ZTE CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com