Transmitting location data in wireless networks

• US 9,544,872 B2
• Filed: 08/03/2015
• Issued: 01/10/2017
• Est. Priority Date: 10/09/2007
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Wu, Deyun, Kuehnel, Thomas W., Hassan, Amer A., Lu, Yi, Shen, Hui, Subramani, Sundar P., Swamy, Vinod K.
• Primary Examiner(s): HTUN, SAN A
• Application Number:
  US14/817,011
• Publication Number:
  US 20160037479A1
• Time in Patent Office: 526 Days
• US Class Current: 1/1
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 64/003 locating network equipment

Abstract

A wireless access point in a wireless network that may be adapted to transmit location data indicating its location to other devices within range, including other wireless access points and client devices. The location data may be embedded in a control message or announcement transmission transmitted by the wireless access point. In terms of the Open Systems Interconnect (OSI) layered model of a network, layer 2 control messages, including beacons, probe responses, or other suitable transmissions may be used for control messages or announcement transmissions. The other wireless access points and client devices may receive the location data broadcast by the wireless access point without establishing a connection to the client device. Devices receiving the location data may use the received location data to determine their own locations, and may provide the determined locations to consumers of location data.

Claims

1. A method performed on a wireless network computing device, the method comprising:

encoding, by the wireless network computing device, location data into an information element, where the location data identifies a physical location of the wireless network computing device, and where the information element comprises;

an information element identifier field that comprises a first value that indicates a type of the information element,

a location data value field that comprises a second value that identifies at least a portion of the physical location,

a location data type field that comprises a third value that indicates a type of the at least a portion of the physical location identified in the second value, where the type indicates that the second value in the location data value field comprises an error amount, and where the error amount indicates an estimated error radius around the physical location, and

a unique identifier field that compromises a fourth value that indicates a particular organization generating the location data encoded in the information element; and

transmitting, by the wireless network computing device, a beacon that includes the information element encoded with the location data.

2. The method of claim 1 where the third value in the location data type field indicates that the second value in the location data value field comprises longitude and latitude values that correspond to the physical location.

3. The method of claim 1 where the third value in the location data type field indicates that the second value in the location data value field comprises an altitude value that corresponds to the physical location.

4. The method of claim 1 where the encoding is in conformance to an IEEE 802.11 standard.

5. A wireless network computing device comprising:

a processor via which the wireless network computing device encodes location data into an information element, where the location data identifies a physical location of the wireless network computing device, and where the information element comprises;

an information element identifier field that comprises a first value that indicates a type of the information element,

a location data value field that comprises a second value that identifies at least a portion of the physical location,

a location data type field that comprises a third value that indicates a type of the at least a portion of the physical location identified in the second value, where the type indicates that the second value in the location data value field comprises an error amount, and where the error amount indicates an estimated error radius around the physical location, and

a unique identifier field that compromises a fourth value that indicates a particular organization generating the location data encoded in the information element; and

a network adapter via which the wireless network computing device transmits a beacon that includes information element encoded with the location data.

6. The wireless network computing device of claim 5 where the third value in the location data type field indicates that the second value in the location data value field comprises longitude and latitude values that correspond to the physical location.

7. The wireless network computing device of claim 5 where the third value in the location data type field indicates that the second value in the location data value field comprises an altitude value that corresponds to the physical location.

8. The wireless network computing device of claim 5 where the encoding is in conformance to an IEEE 802.11 standard.

9. At least one computer-readable medium comprising:

memory that comprises computer-executable instructions that, based on execution by a wireless network computing device, configure the wireless network computing device to perform actions comprising;

encoding, by the wireless network computing device, location data into an information element, where the location data identifies a physical location of the wireless network computing device, and where the information element comprises;

an information element identifier field that comprises a first value that indicates a type of the information element,

a location data value field that comprises a second value that identifies at least a portion of the physical location,

a location data type field that comprises a third value that indicates a type of the at least a portion of the physical location identified in the second value, where the type indicates that the second value in the location data value field comprises an error amount, and where the error amount indicates an estimated error radius around the physical location, and

a unique identifier field that compromises a fourth value that indicates a particular organization generating the location data encoded in the information element; and

transmitting, by the wireless network computing device, a beacon that includes the information element encoded with the location data.

10. The at least one computer-readable medium of claim 9 where the third value in the location data type field indicates that the second value in the location data value field comprises longitude and latitude values that correspond to the physical location.

11. The at least one computer-readable medium of claim 9 where the third value in the location data type field indicates that the second value in the location data value field comprises an altitude value that corresponds to the physical location.

12. The at least one computer-readable medium of claim 9 where the encoding is in conformance to an IEEE 802.11 standard.