Hidden node detection method and equipment

Abstract

The invention provides a hidden node detection method and equipment. The method comprises the steps of monitoring a signal of a station (STA) in a medium according to a received monitoring instruction, wherein the signal contains the node identification of the station which transmits the signal; if the node identification represents an isolation node of the node, judging whether the station is located in the overlapped coverage area of the node and the isolation node; and if yes, determining the isolation node to be a hidden node of the node. The node comprises a monitoring module, a judging module and a determining module. A node controller comprises a transceiving module, a judging module and a determining module. The scheme provided by the invention realizes accurate positioning of an access point (AP) belonging to the hidden node without changing the STA station.

Description

technical field [0001] The embodiment of the present invention relates to the field of network technologies, and in particular to a method and device for detecting a hidden node. Background technique [0002] Wireless Local Area Network (WLAN for short) is a computer local area network with wireless channel as the transmission medium, and is the product of the combination of computer network and wireless communication technology. Using the wireless method to provide the functions of the traditional wired LAN can enable users to access the broadband network anytime, anywhere and at will. The schematic diagram of the most widely used wireless local area network architecture can be as follows: figure 1 As shown, it includes an access point (Access Point, AP for short) and a station (Station, STA for short). The AP acts as a bridge between the wired network and the wireless network. One end uses the network to communicate with the wired network, and the other end uses the ante...

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Problems solved by technology

[0010] For the first method, after the RTS / CTS interaction is enabled, the STA needs to perform the RTS / CTS interaction before transmitting the signal. This interaction takes a certain amount of time, resulting in a decrease in communication efficiency; in addition, it is impossible to detect hidden nodes. Existence, can only tolerate hidden nodes and avoid the problems caused by them, but cannot fundamentally eliminate the influence of hidden nodes;

[0011] For the second method, the detection process is initiated by the STA, and the detection result is reported by the STA. For the actual network situation, the STA as an ordinary client needs to make a lot of improvements. This situation is not feasible in implementation, and it can only solve the hidden STA problem. problem, can not solve the problem of hidden AP

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