| 摘要 |
A monitoring device according to the invention has memory (104), real time module (105), IEEE 802.11 compatible radio module (102) capable of monitoring Wi-Fi devices within a communication range to detect their MAC addresses and communication means (103) for communicating with remote server, all connected to the central unit (101). The monitoring device further has: - means for receiving a list of ignored MAC addresses from a remote server via communication interface, - means for comparing detected MAC address of Wi-Fi device against the list of ignored MAC addresses, - means for storing in the memory (104) the MAC addresses of the Wi-Fi device within the memory (104) together with the time stamp to form the monitoring data, - means for uploading monitoring data stored in the memory (104) to the server in a time interval. A monitoring system according to the invention comprises a server (201) and at least the first monitoring device (100a,100b,100c) as defined in any of the claims 1 to 4, disposed within a facility under monitoring. The server (201) has a means for receiving the monitoring data from at least the first monitoring device (100a,100b,100c) via telecommunication network and has means for identifying in the received monitoring data MAC addresses of devices that meet predetermined criteria, to form a list of ignored MAC addresses, means for sending this list of ignored MAC addresses at least to the first monitoring device, means for receiving a query of the user, means (202) for analysis of monitoring data according to the received query of the user and his privileges, visualization means (204) for presenting the results of the analysis to the user. A method of monitoring according to the invention comprises the first step of storing MAC addresses with time stamps to the memory (104) of monitoring device (100a, 100b, 100c) to form monitoring data, a step of forming the list of background MAC addresses, wherein on the list of background MAC addresses there are entered MAC addresses of devices that meet either first criterion of being in range of monitoring device (100a,100b,100c) for at least predefined percentage of time measured or second criterion of being in range of the monitoring device (100a,100b,100c) in a predefined regular pattern. The method further comprises the second step of storing the MAC addresses with time stamps to the memory (104) to form the second monitoring data being output data, wherein MAC addresses that are on the list are not stored into memory (104). |
