System and method for locating a switch component

• US 6,047,193 A
• Filed: 11/12/1997
• Issued: 04/04/2000
• Est. Priority Date: 11/12/1997
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Northern Telecom Limited (Nortel Networks Corporation)
• Inventors: Stovall, Gregory T., McKnight, David Wesley
• Primary Examiner(s): Trost, William G.
• Application Number:
  US08/968,272
• Time in Patent Office: 874 Days
• Field of Search: 455/456-457, 455/423-424, 455/422, 455/67.1, 455/67.7, 455/31.2, 329/22, 329/25, 329/325, 329/328-330, 329/326, 329/201, 340/539
• US Class Current: 455/456.1
• CPC Class Codes: H04M 3/229 Wire identification arrangements; Number assignment determination
• CPC Class Codes: H04Q 1/10 Exchange station construction
• CPC Class Codes: H04Q 2201/12 Printed circuits

Abstract

A system and method for locating a specific component of a facility by using differential signaling. The system works in a facility such as a central office having many components, such as line cards. The central office includes several wireless transmitters for transmitting signals inside the office. Attached to each line card is a positioning device, which has a receiver for receiving the transmitted signals, a controller for converting the transmitted signals into location information, and a sender for transmitting the location information. The central office also includes a computer with a device for receiving the transmitted location information. As a result, the computer can provide to a user the location of the component inside the facility.

Claims

1. A system for locating a component inside a facility comprising:

a plurality of wireless transmitters located in a predefined area of the facility for transmitting signals;

a positioning device attached to the component, the positioning device including a receiver for receiving the transmitted signals, a controller for converting the transmitted signals into location information, and a sender for transmitting the location information;

a device for receiving the transmitted location information into a processor, wherein the processor can use the transmitted location information to identify a specific location within the predefined area;

a map to which the processor may convert the location information into a physical coordinate for locating the component at the specific location, wherein the component is located in a rack, and the physical coordinate identifies a position within the rack.

2. A method for finding a component having a positioning device and located in a central office having a central device, the method comprising:

a) the positioning device performing the steps of;

I) receiving at least three radio frequency (RF) signals from which a specific location can be determined;

ii) converting the RF signals into location information identifying a specific location;

iii) storing the location information;

iv) receiving an identifier for identifying the component;

v) transmitting the location information and identifier to the central device;

b) the central device performing the steps of;

I) receiving the location information and identifier;

ii) correlating the location information to a specific component;

iii) providing the correlated location information.

3. The method of claim 2 wherein step b), ii) uses a map to convert the location information to a physical coordinate.

4. The method of claim 2 wherein the location information and identifier are transmitted through a data bus.

5. The method of claim 2 wherein the location information and identifier are transmitted by wireless communication.

6. The method of claim 2 wherein the location information and identifier are transmitted upon the occurrence of either initial operation of the positioning device, an elapsed period of time, or detection that the component has moved within the facility.

7. The method of claim 2 wherein the facility contains a plurality of similar components.

8. The method of claim 2 wherein the signals are provided by low power spread spectrum wireless transmitters located in the facility.

9. The method of claim 2 further comprising the step of attaching the positioning device to the component.

10. The method of claim 2 wherein the positioning device further performs the step of:

vi. comparing the location information to previously stored location information; and

wherein the location information and identifier are transmitted to the central device only if the location information is different from the previously stored location information.

11. A method for finding a component having a positioning device and located in a facility having a central device, wherein the facility is a central office that contains a plurality of components which are line cards, the method comprising:

a) the positioning device performing the steps of;

I) receiving at least three radio frequency (RF) signals from which a specific location can be determined;

ii) converting the RF signals into location information identifying a specific location;

iii) storing the locaton information;

iv) receiving an identifier for identifying the component;

v) transmitting the location information and identifier to the central device;

b) the central device performing the steps of;

I) receiving the location information and identifier;

ii) correlating the location information to a specific component;

iii) providing the correlated location information.