Focused assistance data for wifi access points and femtocells
AssigneeQUALCOMM Incorporated
InventorsStephen William EDGE, Andreas Wachter
Life of this patent
Estimating the term…
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.
Claims48
A method in a mobile device for determining a position fix in a wireless network, the method comprising:
- determining a rough position;
- receiving, at the mobile device, a database from a location server, wherein the database is based on the rough position, wherein the database lists a first set of access points associated with the rough position, and wherein the database comprises at least one of a linked database, a grouped database, or an associated database;
- and
- discovering a second set of access points based on the first set of access points.
A mobile device for determining a position fix in a wireless network, the mobile device comprising:
- a wireless transceiver configured to receive a database from a location server, wherein the database is based on a rough position, wherein the database lists a first set of access points associated with the rough position, and wherein the database comprises at least one of a linked database, a grouped database, or an associated database;
- and
- a processor coupled to the wireless transceiver and configured to determine the rough position and configured to discover a second set of access points based on the first set of access points.
A mobile device for determining a position fix in a wireless network, the mobile device comprising:
- means for determining a rough position;
- means for receiving, at the mobile device, a database from a location server, wherein the database is based on the rough position, wherein the database lists a first set of access points associated with the rough position, wherein the database comprises at least one of a linked database, a grouped database, or an associated database;
- and
- means for discovering a second set of access points based on the first set of access points.
A non-transitory computer-readable storage medium including program code stored thereon for a mobile device to determine a position fix in a wireless network, the non-transitory computer-readable storage medium comprising program code to:
- determine a rough position;
- receive, at the mobile device, a database from a location server, wherein the database is based on the rough position, wherein the database lists a first set of access points associated with the rough position, and wherein the database comprises at least one of a linked database, a grouped database, or an associated database;
- and
- discover a second set of access points based on the first set of access points.
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.
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.
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.
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.
Dependencies are inferred from the claim text.