Unlock instant, AI-driven research and patent intelligence for your innovation.

Feedback method and system of wireless channel information in wireless networks

A technology for wireless channel information and channel information feedback, which is applied in transmission systems, digital transmission systems, signaling, etc., and can solve problems such as unfairness, competition for interference transmission opportunities in OBSS scenarios, etc.

Active Publication Date: 2012-10-31
ZTE CORP
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to provide a wireless channel information feedback method and system in a wireless network, which effectively solves the above-mentioned problems to be solved in the feedback process of wireless channel information, thereby avoiding the need for OBSS scenarios. Defects that create interference and create unfair competition for transmission opportunities

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
  • Feedback method and system of wireless channel information in wireless networks
  • Feedback method and system of wireless channel information in wireless networks
  • Feedback method and system of wireless channel information in wireless networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The sending station AP1 initiates a transmission opportunity by sending a control frame NDPA to multiple receiving stations, and requests the receiving stations to feed back wireless channel information. The receiving station address RA in the MAC header (MAC Header) of the NDPA control frame sent by AP1 is a broadcast address, and the station identification information (STA info) in the MAC frame payload (payload) indicates the identities of STA1, STA2, STA3, and STA4. Among them, STA1 is the first receiving station. After AP1 sends NDPA, STA1 judges itself as the first receiving station in the STA info identification information after successfully receiving the NDPA, and does not set NAV. After AP1 sends NDPA, it continues to send NDP control frames after a short frame interval SIFS. STA1 judges that its current NAV is not set by AP1 and judges whether the channel is idle according to its current NAV value. If the NAV value is zero, it will feed back the wireless cha...

Embodiment 2

[0062]The sending station AP1 initiates a transmission opportunity by sending a control frame NDPA to a receiving station, requesting the receiving station to feed back wireless channel information. The receiving station address RA in the MAC header (MACHheader) of the NDPA control frame sent by AP1 is a unicast address, which is the same as the MAC address of STA1. The station identification information (STA info) in the payload (payload) of the MAC frame indicates the identity of STA1. Among them, STA1 is the first and only channel information feedback party. After AP1 sends the NDPA, STA1 successfully receives the NDPA, judges that its own MAC address is the same as the RA of the NDPA, and its current NAV is not set by AP1, so it does not update its NAV. After AP1 sends NDPA, it continues to send NDP control frames after a short frame interval SIFS. STA1 judges that its current NAV is not set by AP1, and judges whether the channel is idle according to its current NAV value...

Embodiment 3

[0064] The sending station AP1 sends a control frame NDPA to multiple receiving stations to request the receiving stations to feed back wireless channel information within one obtained transmission opportunity. The receiving station address RA in the MAC header (MAC Header) of the NDPA control frame sent by AP1 is a broadcast address, and the station identification information (STA info) in the MAC frame payload (payload) indicates the identities of STA1, STA2, STA3, and STA4. Among them, STA1 is the first receiving station. After AP1 sends the NDPA, STA1 successfully receives the NDPA, and judges that its current NAV is set by AP1, that is, it considers that AP1 is the owner of the current transmission opportunity. STA1 determines that it is the first receiving station in the STA info identification information, and does not set or update the NAV. After AP1 sends NDPA, it continues to send NDP control frames after a short frame interval SIFS. After STA1 successfully receive...

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 two schemes of a feedback method of wireless channel information in wireless networks. One method comprises the steps of: sending a wireless frame to one or more receiving stations by a forwarding station to request the receiving stations to feedback the wireless channel information to the forwarding station and initiate a transmission chance; and feeding back the channel information if the channel is judged to be idle according to the network allocation vector after a first receiving station in identifying information successfully receives the wireless frame. The invention also discloses two schemes of a feedback system of the wireless channel information in the wireless networks. A channel information feedback unit in one system is used for feeding back the wireless channel information if the channel is judged to be idle according to the network allocation vector after the first receiving station in the identifying information successfully receives the wireless frame. By adopting the method and system disclosed by the invention, the problems to be solved aiming at the process whether the wireless channel information is fed back are effectively solved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and system for feeding back wireless channel information in a wireless network. Background technique [0002] Currently in the field of wireless networks, with the rapid development of wireless local area networks (WLANs), the demand for WLAN coverage is also increasing, and the requirements for throughput are also getting higher and higher. In the IEEE802.11 group of the Institute of Electrical and Electronics Engineers industry specification, a series of standards such as 802.11a, 802.11b, 802.11g, etc. have been defined successively. Specifications for technical improvement, for example, the 802.11n task group puts forward the requirement of high throughput (HT, High throughput), supporting data rates up to 600Mbps, and the 802.11ac task group further proposes the concept of higher throughput (VHT, Very High throughput) , by introducing a larger channel bandwidt...

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): H04L1/16
CPCH04L1/0026H04L1/1607
Inventor 吕开颖李楠孙波姜静韩志强
Owner ZTE CORP