Controller for accessing multiple radio frequency identification (RFID) readers

• US 7,295,113 B2
• Filed: 12/20/2004
• Issued: 11/13/2007
• Est. Priority Date: 12/20/2004
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Haller, Stephan, Kubach, Uwe
• Primary Examiner(s): Lieu; Julie Bichngoc
• Application Number:
  US11/015,833
• Publication Number:
  US 20060145813A1
• Time in Patent Office: 1,058 Days
• Field of Search: None
• US Class Current: 340/572.1
• CPC Class Codes: G06F 9/542 Event management; Broadcasting; Multicasting; Notifications
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence

Abstract

A radio frequency identification (RFID) controller within an RFID system includes an RFID interrogator interface configured to receive signals from RFID interrogators and configured to manage the RFID interrogators based on instructions received from an application program. The RFID interrogators are configured to receive data from an RFID tag. The controller also includes a controller core configured to process the signals received from the RFID interrogator interface and to provide the data to the application.

Claims

1. A method comprising:

transmitting a communication from an application to a single RFID interrogator interface;

creating first and second virtual multiplex interrogator interfaces via the single RFID interrogator interface based upon the communication, the first and second virtual multiplex interrogator interfaces associated with first and second multiplex interrogators, respectively;

adding the application as an RFID listener of the first and second virtual multiplex interrogator interface via the single RFID interrogator interface;

initiating scanning for the RFID tag at the first and second virtual multiplex interrogator interfaces by the single interrogator interface;

detecting the RFID tag via the first or second multiplex interrogator;

issuing a notification including an RFID event from the first or second multiplex interrogator interface based upon detecting the RFID tag

receiving the RFID event at the application; and

rendering a graphical user interface outputting event information based on the received RFID event.

2. The method of claim 1 further comprising adding the application as an RFID listener of the single RFID interrogator interface based upon the communication.

3. The method of claim 1 further comprising initiating scanning for an RFID tag at the single RFID interrogator interface by the application.

4. The method of claim 1 further comprising sending a command to read or write from the application to the first or second virtual multiplex interrogator interfaces.

5. The method of claim 1 wherein adding the application as an RFID listener of the first and second virtual multiplex interrogator interface via the single RFID interrogator interface further includes adding a first RFID channel and a second RFID channel as an RFID listener to the single RFID interrogator interface.

6. The method of claim 5 wherein detecting the RFID tag via the first or second multiplex interrogator includes detecting an RFID tag at the first RFID channel or the second RFID channel, respectively.

7. The method of claim 1 wherein issuing a notification including an RFID event from the first or second multiplex interrogator interface based upon detecting the RFID tag further includes identifying the first or second multiplex interrogator as associated with the RFID event.

8. A system comprising:

first and second multiplex interrogators configured to detect an RFID tag;

an application configured to;

transmit a communication, and

receive an RFID event; and

a single RFID interrogator interface configured to;

receive the communication,

create first and second virtual multiplex interrogator interfaces based upon the communication, the first and second virtual multiplex interrogator interfaces associated with first and second multiplex interrogators, respectively,

add the application as an RFID listener of the first and second virtual multiplex interrogator interface,

initiate scanning for the RFID tag at the first and second virtual multiplex interrogator interfaces, and

issue a notification including the RFID event from the first or second multiplex interrogator interface based upon a detection of an RFID tag.

9. The apparatus of claim 8 wherein the single RFID interrogator interface is further configured to add a first RFID channel and a second RFID channel as an RFID listener to the single RFID interrogator interface.

10. The system of claim 8 wherein the application is further configured to add itself as an RFID listener of the single RFID interrogator interface based upon transmitting the communication.

11. The system of claim 8 wherein the application is further configured to initiate scanning for an RFID tag at the single RFID interrogator interface.

12. The system of claim 8 wherein the application is further configured to send a command to read or write to the first or second virtual multiplex interrogator interfaces.

13. A method comprising:

transmitting a communication from an application to a single RFID interrogator interface;

creating first and second antenna interrogator interfaces via the single RFID interrogator interface based upon the communication, the first and second antenna interrogator interfaces associated with first and second antennas, respectively;

adding the application as an RFID listener of the first and second antenna interrogator interfaces via the single RFID interrogator interface;

initiating scanning for the RFID tag at the first and second antenna interrogator interfaces via the single RFID interrogator interface;

detecting the RFID tag via the first or second antennas;

issuing a notification including an RFID event from the first or second antenna interrogator interface based upon detecting the RFID tag

receiving the RFID event at the application; and

rendering a graphical user interface outputting event information based on the received RFID event.

14. The method of claim 13 further comprising adding the application as an RFID listener of the single RFID interrogator interface based upon the communication.

15. The method of claim 13 wherein issuing a notification including the RFID event based upon detecting the RFID tag includes issuing a notification at the single RFID interrogator interface or at the first or second antenna interrogator interfaces.

16. The method of claim 13 further comprising sending a read or write command from the application to the first or second first and second antenna interrogator interfaces.

17. A system comprising:

first and second antennas configured to detect an RFID tag;

an application configured to;

transmit a communication, and

receive an RFID event; and

a single RFID interrogator interface configured to;

receive the communication,

create first and second antenna interrogator interfaces based upon the communication, the first and second antenna interrogator interfaces associated with first and second antennas, respectively,

add the application as an RFID listener of the first and second antenna interrogator interface,

initiate scanning for the RFID tag at the first and second antenna interrogator interfaces, and

issue notification including the RFID event from the first or second antenna interrogator interface based upon a detection of the RFID tag.

18. The system of claim 17 wherein the application is further configured to add itself as an RFID listener of the single RFID interrogator interface based upon transmitting the communication.

19. The system of claim 17 wherein the application is further configured to initiate scanning for an RFID tag at the single RFID interrogator interface.

20. The system of claim 17 wherein the application is further configured to send a command to read or write to the first or second virtual multiplex interrogator interfaces.