Method and device and system for starting RTS/CTS mechanism

Abstract

The invention discloses a method for starting an RTS / CTS mechanism, which comprises the following steps: an AC (AP (Access Point) Controller) receives transmitting terminal information reported by APs in the self district; the AC detects whether hidden nodes exist between APs or not according to the transmitting terminal information reported by the APs; the AC determines STAs (Station) influenced by the hidden nodes according to the transmitting terminal information reported by APs between which the hidden nodes exist, so as to generate controlled information and issue the controlled information to the APs related with the STA; and the APs receive the controlled information, and start the RTS / CTS mechanism when sending data to the STAs according to the controlled information. Accordingly, the invention further discloses a device and system for starting the RTS / CTS mechanism. The method, the device and the system reduce the interference caused by the hidden nodes existing between the APs in the system, the RTS / CTS mechanism is not abused, and the air interface utilization rate and the system access capability are improved.

Description

technical field [0001] The present invention relates to wireless access technology, in particular to a request to send / clear to send (RTS / CTS, Request To Send / Clear To Send) mechanism activation method, device and system. Background technique [0002] Wireless local area network technology is a widely used wireless access technology at present, which uses wireless signals to transmit user information. [0003] The WLAN complies with the IEEE 802.11 series protocols and operates according to the Carrier Sense Collision Avoidance (CSMA / CA) mechanism. The CSMA / CA mechanism supports a simple distributed, contention-based access protocol. In this mechanism, the communication entities are in an equal position, and the communication entities in the common coverage area share the channel. Any communication entity sends data before sending data. Carrier sensing is required, and data can only be sent after waiting for a certain period according to the protocol after the channel is de...

AI Technical Summary

Problems solved by technology

Obviously, the principle of this mechanism is based on the fact that shorter data is less likely to be affected by hidden nodes than long data. The problem with this mechanism is that it does not take into account whether there are hidden nodes in the actual situation; The additional RTS / CTS mechanism provided by long data is meaningless, and the protection mechanism for short data is insufficient in an environment with hidden nodes

[0005] With the increase of wireless LAN devices, the probability of hidden nodes increases, which has a negative impact on user service experience

The interference caused by the hidden node problem between APs in the wireless LAN system increases the probability of APs repeatedly sending data, resulting in low air interface efficiency and decreased system throughput.

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