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A method and system for forming and managing logical RFID tag readers

IP.com Disclosure Number: IPCOM000198219D
Publication Date: 2010-Jul-30
Document File: 4 page(s) / 50K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system for forming and managing logical RFID tag readers is disclosed.

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A method and system for forming and managing logical RFID tag readers

Disclosed is a method and system for forming and managing a logical RFID tag reader. The logical RFID tag reader is formed by a number of passive RFID tag readers mounted on mobile carriers which are used to move large or heavy items. A passive RFID tag reader mounted on a mobile carrier detects and identifies a tagged item when the tagged item is being moved by the mobile carrier. Subsequently, a transmitter associated with the passive RFID tag reader transmits the ID of the tagged item along with a mobile carrier ID to a central system. Additionally, the location of the mobile carrier is determined and provided to the central system along with the mobile carrier ID. The central system then correlates the location of the mobile carrier with the information received from the transmitter and determines the location of the tagged item. By deploying the mobile carriers over a large region/volume, the passive RFID tag readers along with the central system essentially function as a logical RFID tag with a reading area spread over the large region/volume.

Fig. 1 depicts the method system for forming and managing logical RFID tag readers. As shown, the items (100) to be tracked are tagged with passive RFID tags (110) and are moved by a mobile carrier such as a forklift (200). In order to detect and identify the items, one or more passive RFID tag readers (220) are mounted on the forklift. The antennae of the one or more passive RFID tag readers are installed in such a manner that the reading field (235) covers the entire loading space of the forklift. Further, a wireless communication means (225) is provided in the forklift for transmitting a forklift ID and the ID of a tagged item detected by the one or more passive RFID tag readers. The one or more passive RFID tag readers in conjunction with the wireless communication means in the forklift together constitute, in effect, a mobile RFID tag reader.

Additionally, a location sensing means for determining the location of the forklift is provided. In an embodiment, the location sensing means includes an active RFID tag (210) situated in the forklift. The active RFID tag includes the forklift ID. Further, in order to determine the location of the active RFID tag, a number of transceivers (300) installed throughout the region and a location hub (310) are utilized as shown in Fig. 1. In conjunction with the transceivers, the location hub determines the position of the forklift and provides it to a local area network (400). In another embodiment, the location sensing means may utilize the Global Positioning System (GPS) technology to determine the position of the forklift.

Further, in order to receive the transmissions from the wireless communication means in the forklift, a wireless access point (410) is provided. The wireless access point receives information and provides it to the local area network. The local area network...