A method for wireless AP detection and positioning based on signal strength and packet capture rate

Abstract

The invention discloses a wireless AP detection and location method based on signal intensity and package capture rate, and relates to the field of wireless local area network location. The method mainly comprises the following steps: first, a network card and a target AP are associated, and Beacon frames sent by the AP are captured in a monitoring mode; second, a search area is divided into four quadrants, the RSS value is detected in the origin of coordinates, the method goes to a third step if the RSS value is below -80dBm, or the method goes to a fourth step; third, a convergence method is repeatedly performed with the number of the Beacon frames received in unit time as a detection index to determine the quadrant where the target AP is located, and the method goes to the fourth step when that the RSS value is above -80dBm is detected; and fourth, the convergence method is repeatedly performed with the RSS value as a detection index to determine the position of the target AP. By adopting the method, the position of a target AP can be effectively and quickly judged in a large search area.

Description

technical field [0001] The invention relates to a wireless local area network security method, in particular to a wireless AP detection and positioning method based on signal strength and packet capture rate. technical background [0002] With the rapid development of wireless communication technology and computer technology, wireless network technology fully combines the advantages of both, and has been widely used in government departments, enterprises, institutions, personal families and other fields, bringing great benefits to people's work and life. convenient. However, since the wireless local area network uses the air as the transmission medium, it is quite different from the traditional LAN with the cable as the transmission medium in terms of security technologies such as access control and authentication, and it is easy to cause information security issues such as data leakage and "wireless phishing". The problem of using an illegal AP (Access Point, wireless netw...

AI Technical Summary

Problems solved by technology

However, when the detection terminal is far away from the AP, when the RSS (received signal strength or signal strength for short) value is below -80dBm, the mobile terminal used for detection will test in different directions. Even if it moves a large distance, the RSS value will not change significantly. , it is difficult to find the quadrant with the highest received signal strength and thus cannot effectively determine the orientation of the target AP

[0007] In order to solve this problem, the inventor found through long-term research that when the RSS value is below -80dBm far from the AP, if the rate of capturing Beacon frames in a certain direction is faster than that in other directions, the target AP is likely to be in the in this direction

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