In general the task of IT-infrastructure monitoring comes to the exact localisation of a specific object (plug, case of equipment) in three-dimensional space. We solve this task using the method described below.

Near field loopEvery movable object in our IT-infrastructure monitoring system has own RFID tag containing unique ID. We use standard mass production near field EPC Gen2 tags produced in amount of hundreds millions in a year. These tags has the size that allows to stick them even on a cable connector.

Placement points of the objects (a unit of telecommunication rack, a port of patch panel) have a placement sensor (a standard reflecting Infra-red sensor). The sensor changes its state when a plug is connected or a router, for example, is installed in a rack. The sensor is activated by an object regardless of RFID tag presence on the equipment. It is important to prevent an unauthorized operation of staff.

A lengthy RFID antenna is located near a placement sensor. The antenna is served several sensors. It allows reading unique ID of RFID tag to define what specific plug has been connected to a panel port or what specific equipment has been just mounted in a rack.

The significant nuance – it does not need to interrogate RFID tags by a RFID reader every time. An interrogation takes place only when an according sensor is activated. Thereby:

  • one RFID reader can server hundreds RFID antennas;
  • a RFID reader emits RF energy during several minutes in a twenty-four hours that is important at the point of view of power consumption and ecology.

More details description of the system is located in the section Implementation.