Access point group data for positioning
Techniques are described for providing assistance data corresponding to a plurality of access points (APs). The techniques include, in part, providing assistance data to a mobile device. The assistance data comprises group data that is common among the plurality of APs. The group data is associated with a group identifier (ID). The techniques further include providing the group ID and a set of AP-specific information for at least one of the plurality of APs. The group data may include information corresponding to a common grid, common location area and/or common characteristics of the APs.
1. A method for providing assistance data corresponding to a plurality of access points (APs), comprising:
receiving a request from a mobile device for the assistance data, wherein the assistance data relates to at least one AP of the plurality of APs, and the request includes:
one or more group identifiers (IDs) previously received by the mobile device,
an identity of the at least one AP, or
an indication of an approximate location of the mobile device, or
a combination thereof;
responsive to receiving the request, providing assistance data to the mobile device, wherein the assistance data comprises information indicative of least one characteristic that is common among all APs of the plurality of APs, wherein:
the information indicative of the at least one characteristic is associated with a group ID,
the group ID is assigned to each AP of the plurality of APs, and
the information indicative of the at least one characteristic comprises an identification of:
an AP manufacturer,
an AP model,
a chip manufacturer, or
a chip model, or
a combination thereof; and
providing the group ID and a set of AP-specific information for at least one of the plurality of APs;
wherein the information indicative of at least one characteristic comprises information corresponding to a reference grid, wherein the reference grid is used in determining the set of AP-specific information, and wherein the reference grid comprises one or more grid points associated with a signal characteristics for a first AP of the plurality of APs; and
wherein:
(i) the reference grid comprises a plurality of grid points, and wherein one or more grid points of the plurality of grid points is associated with a second AP of the plurality of APs; or
(ii) the reference grid defines a bounding box, the bounding box defining first and second reference axes that intersect, and wherein each of the one or more grid points has a coordinate based on the first and second reference axes; or
a combination thereof.
2. The method of claim 1 , wherein the reference grid defines the bounding box, and the one or more grid points are arranged according to rows and columns, wherein each row is parallel to a first reference axis and each column is parallel to a second reference axis.
3. The method of claim 1 , wherein the reference grid defines the bounding box, and each coordinate comprises a local coordinate with respect to the reference grid, and wherein the reference grid is defined with respect to a fixed point.
4. The method of claim 3 , wherein the fixed point has at least one of an absolute geographic coordinate or a specified civic location.
5. The method of claim 1 , wherein the one or more grid points have a common grid point spacing, common grid origin, or a common grid orientation, or a combination thereof.
6. A device comprising:
a communication subsystem;
a memory; and
a processor communicatively coupled to the communication subsystem and the memory, the processor configured to:
receive a request from a mobile device for assistance data relating to at least one access point (AP) of a plurality of APs, wherein the request includes:
one or more group identifiers (IDs) previously received by the mobile device,
an identity of the at least one AP, or
an indication of an approximate location of the mobile device, or
a combination thereof;
responsive to receiving the request, provide assistance data to the mobile device, wherein the assistance data comprises information indicative of at least one characteristic that is common among all APs of the plurality of APs, wherein:
the information indicative of the at least one characteristic is associated with a group ID,
the group ID is assigned to each AP of the plurality of APs, and
the information indicative of the at least one characteristic comprises an identification of:
an AP manufacturer,
an AP model,
a chip manufacturer, or
a chip model, or
a combination thereof; and
provide the group ID and a set of AP-specific information for at least one of the plurality of APs;
wherein the information indicative of at least one characteristic comprises information corresponding to a reference grid, wherein the reference grid is used in determining the set of AP-specific information, and wherein the reference grid comprises one or more grid points associated with a signal characteristics for a first AP of the plurality of APs; and
wherein:
(i) the reference grid comprises a plurality of grid points, and wherein one or more grid points of the plurality of grid points is associated with a second AP of the plurality of APs;
(ii) the reference grid defines a bounding box, the bounding box defining first and second reference axes that intersect, and wherein each of the one or more grid points has a coordinate based on the first and second reference axes; or
a combination thereof.
7. The device of claim 6 , wherein the reference grid defines the bounding box, and the one or more grid points are arranged according to rows and columns, wherein each row is parallel to a first reference axis and each column is parallel to a second reference axis.
8. The device of claim 6 , wherein the reference grid defines the bounding box, and each coordinate comprises a local coordinate with respect to the reference grid, and wherein the reference grid is defined with respect to a fixed point.
9. The device of claim 8 , wherein the fixed point has at least one of an absolute geographic coordinate or a specified civic location.
10. The device of claim 6 , wherein the one or more grid points have a common grid point spacing, common grid origin, or a common grid orientation, or a combination thereof.
11. A method for obtaining assistance data corresponding to a plurality of access points (APs), comprising:
sending a request to a device for the assistance data, wherein the assistance data relates to at least one AP of the plurality of APs, and the request includes:
one or more group identifiers (IDs) previously received by a mobile device,
an identity of the at least one AP, or
an indication of an approximate location of the mobile device, or
a combination thereof;
subsequent to sending the request, receiving assistance data from the device, wherein the assistance data comprises information indicative of at least one characteristic that is common among all APs of the plurality of APs, wherein:
the information indicative of the at least one characteristic is associated with a group ID,
the group ID is assigned to each AP of the plurality of APs, and
the information indicative of the at least one characteristic comprises an identification of:
an AP manufacturer,
an AP model,
a chip manufacturer, or
a chip model, or
a combination thereof;
receiving the group ID and a set of AP-specific information for at least one AP among the plurality of APs; and
determining AP vicinity information corresponding to the at least one AP based on the group ID and the set of AP-specific information;
wherein the information indicative of at least one characteristic comprises information corresponding to a reference grid, wherein the reference grid is used in determining the set of AP-specific information, and wherein the reference grid comprises one or more grid points associated with a signal characteristics for a first AP of the plurality of APs; and
wherein:
(i) the reference grid comprises a plurality of grid points, and wherein one or more grid points of the plurality of grid points is associated with a second AP of the plurality of APs; or
(ii) the reference grid defines a bounding box, the bounding box defining first and second reference axes that intersect, and wherein each of the one or more grid points has a coordinate based on the first and second reference axes; or
a combination thereof.
12. The method of claim 11 , wherein the reference grid defines the bounding box, and the one or more grid points are arranged in rows and columns, wherein each row is parallel to a first reference axis and each column is parallel to a second reference axis.
13. The method of claim 11 , wherein the reference grid defines the bounding box, and each coordinate comprises a local coordinate with respect to the reference grid, and wherein the reference grid is defined with respect to a fixed point, and wherein the fixed point has at least one of an absolute geographic coordinate or a specified civic location.
14. A device comprising:
a transceiver;
a memory; and
a processor communicatively coupled to the transceiver and the memory, the processor configured to:
send a request to a remote device for assistance data relating to at least one access point (AP) of a plurality of APs, wherein the request includes:
one or more group identifiers (IDs) previously received by the device,
an identity of the at least one AP, or
an indication of an approximate location of the device, or
a combination thereof;
subsequent to sending the request, receive assistance data from the remote device, wherein the assistance data comprises information indicative of at least one characteristic that is common among all APs of the plurality of APs, wherein:
the information indicative of the at least one characteristic is associated with a first ID,
the group ID is assigned to each AP of the plurality of APs, and
the information indicative of the at least one characteristic comprises an identification of:
an AP manufacturer,
an AP model,
a chip manufacturer, or
a chip model, or
a combination thereof;
receive the group ID and a set of AP-specific information for at least one AP among the plurality of APs; and
determine AP vicinity information corresponding to the at least one AP based on the group ID and the set of AP-specific information;
wherein the information indicative of at least one characteristic comprises information corresponding to a reference grid, wherein the reference grid is used in determining the set of AP-specific information, and wherein the reference grid comprises one or more grid points associated with a signal characteristics for a first AP of the plurality of APs; and
wherein:
(i) the reference grid comprises a plurality of grid points, and wherein one or more grid points of the plurality of grid points is associated with a second AP of the plurality of APs;
(ii) the reference grid defines a bounding box, the bounding box defining first and second reference axes that intersect, and wherein each of the one or more grid points has a coordinate based on the first and second reference axes; or
a combination thereof.
15. The device of claim 14 , wherein the reference grid defines the bounding box, and the one or more grid points are arranged, wherein the one or more grid points are arranged in rows and columns, wherein each row is parallel to a first reference axis and each column is parallel to a second reference axis.
16. The device of claim 14 , wherein the reference grid defines the bounding box, and each coordinate comprises a local coordinate with respect to the reference grid, and wherein the reference grid is defined with respect to a fixed point, and wherein the fixed point has at least one of an absolute geographic coordinate or a specified civic location.