Wireless data transmission method, access point and client

Abstract

The embodiment of the invention provides a wireless data transmission method, an access point and a client, and the method comprises the steps: obtaining a currently accessed client STA list, and sequentially scheduling each STA according to the sequence of the STA list; for each STA scheduling, sending a burst Burst data stream to a scheduled STA, enabling the tail end of the Burst data stream tocarry a transmission medium occupation time data scheduling frame with a preset duration, wherein the Burst data stream is a downlink data stream which is sent in a Burst mode and belongs to the scheduled STA, so that an unscheduled STA sets a local network allocation vector NAV as the size of the preset duration; and keeping silence within a preset time length. According to the wireless data transmission method, the access point and the client provided by the embodiment of the invention, the characteristics of polling and virtual carrier monitoring NAV are combined, so that only the AP and the scheduled STA can send the data at any moment, the problem of hidden nodes is solved, the data flow is sent in a Burst mode, and a channel is prevented from being preempted by other equipment.

Description

technical field [0001] The present invention relates to the technical field of wireless transmission, in particular to a wireless data transmission method, an access point and a client. Background technique [0002] In the 802.11 wireless LAN, the medium access control sublayer (MAC layer) protocol uses the Carrier Sense Multiple Access with Collision Avoidance (CSMA / CA) protocol, and the client STA must first listen to the Whether other nodes are sending data. If other nodes are sending data, the STA backs off for a period of time before trying to send data, so as to avoid conflicts. However, when STAs in the 802.11 wireless LAN are far apart or there are obstacles blocking the transmission of signals, these STAs will not be able to hear each other's signals, and these STAs will become "hidden nodes" for each other and "hidden nodes" for each other. When multiple STAs send data to the access point (AP) at the same time, a conflict occurs at the AP, resulting in data trans...

AI Technical Summary

Problems solved by technology

[0004] However, there is a problem that multiple STAs may send RTS frames at the same time in the above-mentioned prior art solution, which may cause conflicts on the communication channel between the AP and the STAs, resulting in the degradation of system performance. Therefore, a new wireless data transmission method is urgently needed now. to solve the above problems

Images