Focused assistance data for wifi access points and femtocells

Patent metadata

Field	Value
Publication number	US-2017006534-A1
Application number	US-201615269606-A
Country	US
Kind code	A1
Filing date	Sep 19, 2016
Priority date	Feb 16, 2013
Publication date	Jan 5, 2017
Grant date	—

Abstract

Systems, apparatus and methods for reducing a long list of access points (APs) to a short list of access points are presented. Advantageously, a mobile device only need to search for access points on the short list thereby more quickly discovering access points, saving battery power, determining a position fix based on the discovered access points, and reducing a time to fix. Embodiments enable a mobile device to determine which access points should be detectable at a new location of the mobile device. Various embodiments comprise: (1) a linked database; (2) a grouped database; (3) an associated database; and (4) database feedback.

First claim

What is claimed is:

1 . A method in a location server for determining a position fix of a mobile device in a wireless network, the method comprising:
receiving, from the mobile device, a rough position; determining a database based on the rough position; and sending, to the mobile device, the database; wherein the database comprises one of a linked database, a grouped database, or an associated database.

2 . The method of claim 1 , wherein the database comprises the linked database, wherein the linked database links a first access point to a second access point and indicates, that while in a coverage area of a first access point, signals from the second access point are receivable.

3 . The method of claim 1 , wherein the database comprises the grouped database, wherein the grouped database associates a plurality of access points predicted to have signals receivable from the rough position.

4 . The method of claim 1 , wherein the database comprises the associated database, wherein the associated database associates a plurality of access points to a macrocell.

5 . The method of claim 4 , wherein the rough position is indicated by the macrocell.

6 . A location server for determining a position fix of a mobile device in a wireless network, the location server comprising:
means for receiving, from the mobile device, a rough position; means for determining a database based on the rough position; and means for sending, to the mobile device, the database; wherein the database comprises one of a linked database, a grouped database, or an associated database.

7 . The location server of claim 6 , wherein the database comprises the linked database, wherein the linked database links a first access point to a second access point and indicates, that while in a coverage area of a first access point, signals from the second access point are receivable.

8 . The location server of claim 6 , wherein the database comprises the grouped database, wherein the grouped database associates a plurality of access points predicted to have signals receivable from the rough position.

9 . The location server of claim 6 , wherein the database comprises the associated database, wherein the associated database associates a plurality of access points to a macrocell.

10 . A location server for determining a position fix of a mobile device in a wireless network, the location server comprising:
a transceiver configured to:
receive, from the mobile device, a rough position; and

send, to the mobile device, a database; and
a processor coupled to the transceiver and configured to determining the database based on the rough position, wherein the database comprises at least one of a linked database, a grouped database, or an associated database.

11 . The location server of claim 10 , wherein the database comprises the linked database, wherein the linked database links a first access point to a second access point and indicates, that while in a coverage area of a first access point, signals from the second access point are receivable.

12 . The location server of claim 10 , wherein the database comprises the grouped database, wherein the grouped database associates a plurality of access points predicted to have signals receivable from the rough position.

13 . The location server of claim 10 , wherein the database comprises the associated database, wherein the associated database associates a plurality of access points to a macrocell.

14 . The location server of claim 13 , wherein the rough position is indicated by the macrocell.

15 . A non-transitory computer-readable storage medium including program code stored thereon for a location server to determine a position fix of a mobile device in a wireless network, the non-transitory computer-readable storage medium comprising program code to:
receive, from the mobile device, a rough position; determine a database based on the rough position; and send to the mobile device, the database; wherein the database comprises one of a linked database, a grouped database, or an associated database.

16 . The non-transitory computer-readable storage medium of claim 12 , wherein the database comprises the linked database, wherein the linked database links a first access point to a second access point and indicates, that while in a coverage area of a first access point, signals from the second access point are receivable.

Assignees

• Qualcomm Inc

Inventors

• Edge Stephen William
• Wachter Andreas Klaus

Classifications

• H04W52/0209

  in terminal devices · CPC title

• H04W64/003

  locating network equipment · CPC title

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title

• H04W88/02

  Terminal devices · CPC title

• Y02D30/70

  in wireless communication networks · CPC title