Method, device and system for sounding channels

Abstract

An embodiment of the invention provides a method, a device and a system for sounding channels, and relates to the field of communication. The method, the device and the system are used for shortening waiting time for each receiving station to the greatest extent under the condition that reception of feedback requests is unaffected, and the purpose of saving power is achieved. The method for sounding the channels includes transmitting a null data packet announcement (NDPA) broadcast packet to inform all relevant receiving stations about preparing for sounding the channels; transmitting a null data packet (NDP) broadcast packet to enable each relevant receiving station to compute respective relevant channel feedback information after the relevant receiving station receives the NDP broadcast packet; receiving the channel feedback information which is transmitted by the receiving station corresponding to first receiving station information carried in the NDPA broadcast packet; and sequentially transmitting the feedback requests to the other receiving stations from front to back according to an arrangement sequence of station information in the NDPA broadcast packet so that the channel feedback information transmitted by the other receiving stations can be received.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method, device and system for channel detection. Background technique [0002] The high-throughput sounding protocol (VHT Sounding Protocol) introduced by the Institute of Electrical and Electronics Engineers (IEEE) 802.11ac is a wireless communication protocol that exists in the beamforming initiator (beamformer) and beamforming receiver. The channel detection mechanism between the beamformee. Through this mechanism, the beamforming initiator can better know the channel information between the beamforming receiver and the beamforming receiver, so as to achieve the purpose of improving the communication condition by adjusting the relevant parameters. High-throughput detection mechanisms are divided into the following two types according to their application scenarios: Multi-user multiple input multiple output (MU-MIMO) and single-user multiple input and multiple outp...

AI Technical Summary

Problems solved by technology

[0005] In the process of channel detection mentioned above, during the entire TXOP time period, all receiving stations can only stay in the sleep state until the feedback is completed correctly or the entire TXOP time is consumed, otherwise the receiving station will enter the sleep state in advance and cannot receive correctly. Beamforming report request and correct feedback

Therefore, usually for MU-MIMO scenarios, except for the receiving station corresponding to the first STA Info in the NDPA broadcast packet, which can give feedback immediately, other receiving stations actively requesting to provide feedback information through beamforming reports are waiting. state (that is, not entering the sleep state) for a long time, which will cause the problem of high power consumption

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