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Transmission method and system of channel feedback information

A technology for channel feedback and feedback information, applied in the field of transmission methods and systems for channel feedback information, can solve the problem that the sender cannot obtain the channel feedback information of the receiver in time, etc.

Active Publication Date: 2013-01-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a method and system for transmitting channel feedback information, which is used to solve the technical problem that the sender cannot obtain the channel feedback information of the receiver in time

Method used

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  • Transmission method and system of channel feedback information
  • Transmission method and system of channel feedback information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Station A (sending station) communicates with one or more stations (receiving stations).

[0029] Step 101, station A sends an NDPA frame, and sends an NDP frame after the SIFS of the NDPA frame sending, and requests the receiving station to send channel feedback information within a reserved time.

[0030] Step 102, the first receiving station indicated by the NDPA frame feeds back channel feedback information to station A by default after receiving the NDPA frame and the NDP frame and passing the SIFS;

[0031] The reserved time carried in the NDPA frame is the time when the receiving station feeds back the channel feedback information. Since the present invention allows the time end point pointed to by the reservation time to exceed the time end point pointed to by the TXOP limit, the sending of the secondary channel feedback information is not limited by the TXOP limit.

[0032] If the first receiving station exceeds the TXOP Limit after sending the channel feedbac...

Embodiment 2

[0034] Station A (sending station) communicates with one or more stations (receiving stations).

[0035]Step 201, station A sends an NDPA frame, and sends an NDP frame after SIFS of the end of sending the NDPA frame, and requests the receiving station to send channel feedback information within a reserved time.

[0036] Step 202, the first receiving station indicated by the NDPA frame feeds back channel feedback information to station A by default after receiving the NDPA frame and the NDP frame and after SIFS.

[0037] Step 203, after the first receiving station has finished feeding back the channel feedback information, if the end point of time pointed to by the TXOP limit has not been exceeded after one SIFS; or the end point of time pointed to by the TXOP limit has not been exceeded at the current time point, After station A waits for a SIFS and confirms that the remaining TXOP duration is not less than the transmission duration of a Beamforming Report Poll, station A send...

Embodiment 3

[0042] Station A (sending station) communicates with one or more stations (receiving stations).

[0043] Step 301, station A sends an NDPA frame, and sends an NDP frame after SIFS after the NDPA frame sending is completed, and requests the receiving station to send channel feedback information within a reserved time.

[0044] Step 302, the first receiving station indicated by the NDPA frame feeds back channel feedback information to station A by default after receiving the NDPA frame and the NDP frame and passing the SIFS;

[0045] Step 303, after a receiving station has finished feeding back the channel feedback information, if the receiving station needs to retransmit part or all of the channel feedback information, if a SIFS or point coordination function interframe space (Point coordination function Interframe Space, PIFS) is passed ) has not exceeded the end point of the time pointed by the TXOP limit, or the current time point has not exceeded the end point of the time p...

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Abstract

The invention discloses a transmission method and system of channel feedback information, which is used to solve the technical problem that a transmitter cannot obtain the channel feedback information from a receiver timely. The technical scheme of the invention is as follows: a transmitting station site sends a wireless frame to a receiving station site after obtaining the transmission chance, and requests the receiving station site to transmit the channel feedback information; the receiving station site transmits the wireless frame carrying the channel feedback information to the transmitting station site after receiving the wireless frame transmitted by the transmitting station site, and the transmission finishing time of the wireless frame carrying the channel feedback information is allowed to exceed the finishing time specified by the transmission time threshold of the transmission chance. Under the condition that the receiver cannot estimate the data amount and speed of the channel feedback information fed back by the receiving station site or that whether the time for the receiver to feed back the channel feedback information exceeds the transmission time threshold, the channel feedback information of the receiver can be still obtained timely.

Description

technical field [0001] The present invention relates to the communication field, in particular to a transmission method and system for channel feedback information. Background technique [0002] At present, in the wireless network field, the wireless local area network (Wireless Local Access Network, WLAN) develops rapidly, and the requirement for coverage of the WLAN is increasing day by day, and the requirement for the throughput of the WLAN 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 improvement, for example, the 802.11n task group puts forward the requirement of high throughput (High Throughput, HT), supporting a data rate up to 600Mbps; the 802.11ac task group f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
CPCH04L1/0027H04W72/23H04W24/08
Inventor 江岸明吕开颖姜静
Owner ZTE CORP