Methods and apparatus for a pervasive locationing and presence-detection system

• US 7,961,098 B2
• Filed: 08/31/2007
• Issued: 06/14/2011
• Est. Priority Date: 09/08/2006
• Status: Active Grant

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Kanagala, Sameer, Khojasteh, Kamran
• Primary Examiner(s): Hunnings; Travis R
• Application Number:
  US11/848,915
• Publication Number:
  US 20090058638A1
• Time in Patent Office: 1,383 Days
• Field of Search: 340/539.13
• US Class Current: 340/572.1
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G01S 19/51 Relative positioning
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/20 Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

A locationing system for use in a wireless network generally includes a wireless switch and a global positioning system (GPS) located proximate to or integrated into the wireless switch such that it communicates GPS data to the wireless switch. At least one access port (AP) is coupled to the wireless switch. At least one RFID reader (mobile and/or fixed) is configured to communicate with the access port, and the RFID reader is configured to read an RFID tag and communicate RFID tag data to the wireless switch. The wireless switch is configured to determine the location of the RFID tag utilizing the GPS data and the RFID tag data.

Claims

1. A locationing system for use in a wireless network, the system comprising:

a wireless switch;

a global positioning system (GPS) integral with the wireless switch and configured to communicate GPS data to the wireless switch;

at least one access port (AP) coupled to the wireless switch; and

at least two RFID readers configured to communicate with the at least one access port, each of the two RFID readers configured to read an RFID tag and communicate RFID tag data to the wireless switch, wherein the at least two RFID readers include a mobile RFID reader and a fixed RFID reader, the fixed RFID reader having a known location;

wherein the wireless switch is configured to determine the location of the RFID tag utilizing the GPS data and at least one of the known location of the fixed RFID reader and a known offset distance between the access port and the mobile RFID reader.

2. The locationing system of claim 1, wherein the RFID tag is a passive tag.

3. A wireless switch comprising:

a processor configured to receive RFID tag data from an access port, a mobile RFID reader, and a fixed RFID reader, the fixed RFID reader having a known location;

a global positioning system (GPS) integral with the wireless switch and communicatively coupled to the processor;

wherein the processor is configured to communicate GPS data to the wireless switch, and wherein the wireless switch is configured to determine the location of the RFID tag utilizing the GPS data and at least one of a known location of the fixed RFID reader and a known offset distance between the access port and the mobile RFID reader.

4. The wireless switch of claim 3, wherein the wireless switch is configured to receive the RFID tag data from a mobile RFID reader and a fixed RFID reader having a known location, and wherein the wireless switch is further configured to determine the location of the RFID tag using the known location of the fixed RFID reader.

5. The wireless switch of claim 4, wherein the wireless switch is further configured to determine the location of the RFID tag using a known offset distance associated with the access port and the mobile RFID reader.

6. The wireless switch of claim 3, wherein the wireless switch is configured to receive RFID tag data from a passive RFID tag.

7. A locationing method comprising:

providing a wireless switch within an environment;

providing a fixed RFID reader within the environment, the fixed RFID reader having a known location;

providing a mobile RFID reader within the environment;

providing an access port coupled to the wireless switch;

providing a global positioning system (GPS) integral with the wireless switch and configured to communicate GPS data to the wireless switch;

receiving RFID tag data associated with an RFID tag from the fixed RFID reader and the mobile RFID reader;

receiving the GPS data; and

determining the location of the RFID tag utilizing the GPS data, the RFID tag data, and at least one of the known location of the fixed RFID reader and a known offset distance between the mobile RFID reader and the access port.

8. The method of claim 7, wherein the location of the RFID tag is sent to an enterprise application over the network, and wherein the enterprise application is configured to track the location geographically and display the location to a user.