Self-monitored active rack

• US 7,071,825 B2
• Filed: 04/26/2004
• Issued: 07/04/2006
• Est. Priority Date: 04/26/2004
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: VoBa, Son
• Primary Examiner(s): NGUYEN, HUNG T
• Application Number:
  US10/832,076
• Publication Number:
  US 20050237194A1
• Time in Patent Office: 799 Days
• Field of Search: 340/572.1, 340/539.21, 340/539.23, 340/568.1, 340/568.8, 340/505, 340/10.1, 340/825.49, 340/825.69, 340/572.3, 340/572.4, 340/539.1, 235/380, 235/383, 235/385, 705/22, 705/23, 705/28
• US Class Current: 340/572.1
• CPC Class Codes: G08B 13/2417 having a radio frequency identification chip
• CPC Class Codes: G08B 13/2462 Asset location systems combined with EAS inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00

Abstract

A radio frequency identification (RFID) tag is used to detect the presence and identification of devices or equipment in a rack. Each device in the rack has an associated RFID tag that contains device information. The system which is implemented in the rack receives the information from the RFID tag on each device in the rack and provides the information to a central location, such as a central computer, where that information can be acted on, stored, processed, analyzed, and/or accessed by a system administrator or user, for example. The system that is implemented in the rack may continue to monitor the presence of the devices in the rack for security purposes.

Claims

1. A system for determining presence of a device, comprising:

a radio frequency identification (RFID) tag disposed on the device; and

a rack in which the device is maintained, the rack comprising;

an antenna adapted to transmit interrogation signals to the RFID tag, and receive presence signals from the RFID tag; and

a presence and occupancy discovery (pod) unit comprising an RF interrogator and an RF controller, the pod unit adapted to receive and decode the presence signals from the antenna, and to determine the presence of the device in the rack based on the decoded presence signals, and to monitor the continued presence of the device in the rack by directing interrogation signals to be transmitted via the antenna at predetermined times and confirming detection of received presence signals from the device, wherein if a presence signal is not received from the device, the pod unit starts a timer, and if the timer elapses before another presence signal is received from the device, at least one of an indicator is activated, an absence entry is logged in storage, and a warning signal is provided to a central controller.

2. The system of claim 1, further comprising a central controller remote from the rack and adapted to receive the presence signals from the pod unit and provide information about the device in response to the presence signals.

3. The system of claim 2, further comprising a storage device connected to the central controller comprising identification information, the central controller accessing the storage device and retrieving the identification information based on the decoded presence signals.

4. The system of claim 1, wherein the rack is capable of receiving a plurality of devices, and the antenna is disposed along the height of the rack to transmit interrogation signals to each of the devices.

5. The system of claim 1, wherein the rack is capable of receiving a plurality of devices, and the antenna comprises a plurality of antennae, each of the plurality of antennae corresponding to an associated one of the devices to transmit interrogation signals individually to each of the devices.

6. The system of claim 1, wherein the pod unit is further adapted to identify the device based on the decoded presence signals.

7. The system of claim 6, further comprising a storage device connected to the pod unit comprising identification information, the pod unit accessing the storage device and retrieving the identification information based on the decoded presence signals.

8. The system of claim 1, wherein the timer is programmable via the rack or a central controller.

9. The system of claim 1, wherein the decoded presence signals comprise identification information associated with the device.

10. The system of claim 1, wherein the pod unit is adapted to receive presence signals from a plurality of RFID tags associated with a plurality of devices, identify the devices associated with the RFID tag based on the received presence signals, and monitor the presence of the identified devices.

11. A method for determining presence of a device in a rack, comprising:

receiving a presence signal from at least one radio frequency identification (RFID) tag at a detector comprising an RF controller, the RFID tag disposed on the device, the device maintained in the rack;

decoding the presence signals at a presence and occupancy discovery (pod) unit associated with the rack;

determining the presence of the device in the rack based on the decoded presence signals; and

monitoring the continued presence of the device in the rack by transmitting interrogation signals towards the device at predetermined times and confirming detection of received presence signals from the device, and if a presence signal is not received from the device, starting a timer, and if the timer elapses before another presence signal is received from the device, at least one of activating an indicator, logging an absence entry, and providing a warning signal.

12. The method of claim 11, further comprising providing the presence signals to a central controller remote from the rack, and retrieving information about the device in response to the presence signals.

13. The method of claim 11, further comprising accessing a storage device and retrieving identification information based on the decoded presence signals from the storage device.

14. The method of claim 11, further comprising receiving presence signals from a plurality of devices via an antenna disposed along the height of the rack.

15. The method of claim 11, further comprising receiving presence signals from a plurality of devices via a plurality of antennae, each of the plurality of antennae corresponding to an associated one of the devices.

16. The method of claim 11, further comprising identifying the device based on the decoded presence signals.

17. The method of claim 11, wherein the decoded presence signals comprise identification information associated with the device.

18. The method of claim 11, further comprising receiving presence signals from a plurality of RFID tags associated with a plurality of devices, identifying the devices associated with the RFID tag based on the received presence signals, and monitoring the presence of the identified devices.