Apparatus for and method of using an intelligent network and RFID signal router

• US 7,750,812 B2
• Filed: 03/03/2006
• Issued: 07/06/2010
• Est. Priority Date: 03/03/2005
• Status: Expired due to Fees

• Current Assignee: Sensormatic Electronics LLC (Johnson Controls International plc)
• Original Assignee: Sensormatic Electronics LLC (Johnson Controls International plc)
• Inventors: Kaenel, Tim Von, Campero, Richard J., Trivelpiece, Steve, Cocotis, Thomas
• Primary Examiner(s): Nguyen; David Q
• Application Number:
  US11/366,502
• Publication Number:
  US 20060220876A1
• Time in Patent Office: 1,586 Days
• Field of Search: 340/572.7, 340/572.1, 340/10.1, 340/572.8, 340/572.4, 343/893, 343/905
• US Class Current: 340/572.7
• CPC Class Codes: G06K 17/0022 arrangements or provisions for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10079 the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 67/125 involving control of end-device applications over a network
• CPC Class Codes: H04L 67/52 specially adapted for the location of the user terminal
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 88/14 Backbone network devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Apparatuses, systems for, and methods of transporting digital signals and radio-frequency (“RF”) signals are disclosed. In accordance with a preferred embodiment of the invention, an intelligent network (e.g., a combination router) and corresponding method are provided for transporting RF signals to, for example, an RFID antenna and transporting digital signals to, for example, a controller. In a preferred embodiment, the intelligent network is implemented with a manager unit for controlling a plurality of network devices to facilitate the efficient management of RFID-enabled devices. The network devices may include a combination router/switch, which has the capability of switching both digital data and RF data, RFID readers, RFID reader/writer pads, and other devices. In accordance with preferred embodiments, the intelligent network allows enhanced flexibility in controlling systems for interrogation of RFID antennae.

Claims

1. A method of transporting signals to an RFID reader antenna, the method comprising the steps of

selecting a first communication route for transporting at least one RF signal from an RFID reader to at least one RFID antenna, wherein the first communication route is selected in accordance with a routing method and using an automated determination of available RF communication routes, wherein the automated determination of available RF communication routes comprises a first node determining at least one adjacent second node to which it has a direct RF communication path, and relaying the identity of the adjacent second node to a first controller;

selecting a second communication route for transporting at least one digital signal from the first controller to a second controller;

transporting the at least one RF signal to the RFID antenna along the first communication route; and

transporting the at least one digital signal to the second controller along the second communication route.

2. The method of transporting of claim 1, wherein the routing method is selected from the group consisting of:

operational readiness, RIP, IGRP, OSPF, and EIGRP.

3. The method of transporting of claim 1, wherein the step of selecting the first communication route is also based on the selection of the second communication route in accordance with another routing method.

4. The method of transporting of claim 3, wherein the another routing method is selected from the group consisting of RIP, IGRP, OSPF, and EIGRP.

5. The method of transporting of claim 1, wherein the step of determining an adjacent second node comprises sending identifying information over the direct RF communication path between the first node and the adjacent second node.

6. The method of transporting of claim 5, wherein identifying information is the media access control (MAC) address of a node selected from the group consisting of the first node, the adjacent second node, or both nodes.

7. The method of transporting of claim 6, wherein the identifying information is also transmitted by digital signals to the first controller.

8. The method of transporting of claim 6, wherein the identifying information is transmitted by RF signals over the RF direct communication path.

9. The method of transporting of claim 1, further comprising additional nodes that each relay the identities of their adjacent nodes to the first controller.

10. The method of transporting of claim 9, further comprising a step of the first controller determining an RF communication path between the RFID reader and another RFID antenna connected to a node on the RF communication path.

11. The method of transporting of claim 10, wherein the first controller directs nodes along the determined RF communication path to activate switches at the nodes to complete the determined RF communication path.

12. The method of transporting of claim 1, further comprising after a predetermined period of time, a redetermination of adjacent devices by one or more nodes, and again relaying corresponding adjacency information to the first controller, whereby the first controller is capable of making a revised automatic determination of RF communication paths.

13. The method of transporting of claim 1, further comprising, measuring characteristics of an RF signal at least one of a plurality of nodes using a sensor.

14. The method of transporting of claim 13, wherein the sensor measures a characteristic of at least part of an RF signal.

15. The method of transporting of claim 13, wherein the RF signal is generated by an RFID reader connected to the available RF communication routes.

16. The method of transporting of claim 13, wherein the RF signal is generated by a device within one of the plurality of nodes.

17. The method of transporting of claim 16, wherein the RF generating device is a voltage controlled oscillator (VCO).

18. The method of transporting of claim 17, wherein the VCO generates RF at one or more frequencies, or a range of frequencies.

19. The method of transporting of claim 13, wherein the sensor measures transmitted or reflected RF power.

20. The method of transporting of claim 19, wherein the sensor measures VSWR.

21. The method of transporting of claim 20, wherein an alert is generated based on the sensor measurement.

22. The method of transporting of claim 19, wherein the first controller adjusts the reader power based on the sensor measurement.

23. The method of transporting of claim 19, wherein the first controller or the node adjusts the tuning of an antenna based on the VSWR measurement.

24. The method of transporting of claim 19, wherein the antenna tuning adjustment is made using a voltage controlled capacitor.

25. The method of transporting of claim 19, wherein the first controller determines whether to use an RF communication path or portion thereof based on the sensor measurement.

26. The method of transporting of claim 19, wherein the first controller determines whether to read an antenna based on the sensor measurement.

27. The method of transporting of claim 19, wherein the first controller determines whether to select an alternate communication path or portion thereof based on the sensor measurement.

28. The method of transporting of claim 1, the method further comprising mapping the RFID antenna onto a physical location selected from a group comprising:

a shelf, a fixture, an aisle, a department, and a building.

29. The method of transporting of claim 28, the method further comprising automatically relating received data received from the mapped antenna to the physical location, wherein the received data includes information from another group comprising:

item identification, item quantity, antenna status, and antenna fault.

30. The method of transporting of claim 28, wherein the facility is a retail store, pharmacy, storeroom, warehouse, distribution center, or factory.

31. The method of transporting of claim 1, wherein the first node is on the first communication route, and wherein the first node and the second controller are disposed within a same device, the same device being a combination router has the capability of processing command data signals and facilitating the transporting of both the at least one RF signal and the at least one digital signal.

32. The method of claim 31 wherein the identity of the adjacent second node is routed to the first controller from the combination router using another digital data signal.

33. The method of claim 31 wherein the at least one adjacent second node is another a combination router that has the capability of processing the command data signals and facilitating the transporting of both RF signals and digital signals.

34. The method of transporting of claim 12, wherein at least some of the adjacent devices are each a combination router that has the capability of processing the command data signals and facilitating the transporting of both RF signals and digital signals.