Abstract:
A method of determining, at a server, an altitude of a mobile device, includes: receiving, at the server from the mobile device, a present barometric pressure at the mobile device; and determining, at the server, an altitude of the mobile device based on the present barometric pressure and a present reference barometric pressure at a known altitude.
Abstract:
A method of providing pressure information from a mobile device includes: measuring a barometric pressure at the mobile device; determining a present barometric pressure based on the measured barometric pressure; and sending, from the mobile device toward a server, the present barometric pressure. The server may determine an altitude for the mobile device based on the present barometric pressure and a known reference pressure for a known altitude. The method may further include providing pressure statistics and/or calibration points by the mobile device to the server where the calibration points include pressure measurements for known or determinable locations. The calibration points may enable the server to determine a calibration value to enable an adjustment or correction to the measured barometric pressure.
Abstract:
Disclosed are methods, devices, systems, apparatus, processor-readable media, and other implementations, including a method that comprises receiving from multiple mobile devices, at a processor-based server, measurement data representative of sensor measurements performed by at least one sensor of each of the multiple mobile devices, and determining environmental characteristics associated with one or more environments at which each of the multiple mobile devices are located based on one or more environmental rules applied to the measurement data received from the multiple mobile devices. Also disclosed are methods, devices, systems, apparatus, processor-readable media for determining environmental rules based on sensor measurements provided by mobile devices for known locations or known environments.
Abstract:
Techniques disclosed herein provide for enhanced LTE Positioning Protocol (LPP) Reliable Transport where the receiver of an LPP message sends a non-piggybacked acknowledgement. An example method for executing on a mobile device a protocol session with a location server includes sending a first protocol session message associated with a first protocol session to the location server, entering a wait-for-acknowledgement state in which uplink transmissions from the mobile device to the location server are suspended while waiting for an acknowledgement from the location server in response to the first protocol session message, receiving a second protocol session message associated with a second protocol session which is not an acknowledgement to the first protocol session message but includes information requested in the first protocol session message; exiting the wait-for-acknowledgement state responsive to receiving the second protocol session message; and performing an action using the information received in the second protocol session message.
Abstract:
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.
Abstract:
A location server includes: a first receiver module configured to receive, from a location-based services application server (LBS AS), a first identification for a first mobile device associated with the LBS AS; a second receiver module configured to receive, from an access/location network (ALN), a second identification for a second mobile device associated with the ALN; a comparison module, communicatively coupled to the first and second receiver modules, configured to determine whether the first and second identifications match and whether the first and second mobile devices are the same mobile device based at least in part on whether the first and second identifications match; and a location service information module, communicatively coupled to the comparison module, and configured to provide a location service for the first mobile device in response to the comparison module determining that the first and second mobile devices are the same mobile device.
Abstract:
Systems and methods for Secure User Plane (SUPL) Redirection and Mobile Location Protocol (MLP) Tunneling to a Discovered SUPL Location Platform (D-SLP) are disclosed. For example, a method for SUPL redirection by a SET, may include: receiving an initiation message at a SET from a Home SUPL Location Platform (H-SLP); establishing a secure connection with the H-SLP, and returning a response message; receiving a redirect message from the H-SLP; establishing a SET initiated SUPL session with a D-SLP; obtaining a location of the SET using the D-SLP; and returning the location to the H-SLP.
Abstract:
Techniques to support emergency voice-over-Internet Protocol (VoIP) calls are described. The techniques may be used for various 3GPP and 3GPP2 networks, various location architectures, and various types of User Equipment (UE). A UE communicates with a visited network to send a request to establish an emergency VoIP call. The UE interacts with a location server instructed by the visited network to obtain a first position estimate for the UE. The UE performs call setup via the visited network to establish the emergency VoIP call with a PSAP, which may be selected based on the first position estimate. The UE may thereafter perform positioning with the location server to obtain an updated position estimate for the UE, e.g., if requested by the PSAP.
Abstract:
Systems, apparatus and methods for proximity determination between transceivers, such as mobile devices, are presented. Proximity may be a logical combination of geographic proximity, radio proximity and/or cellular proximity. Proximity may be determined using a low overhead coarse test followed by a more intensive accurate test. Proximity may be determined indirectly via one or more intermediary transceivers having a predetermined relationship.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may receive broadcast information related to a second UE from a third UE, relay the broadcast information and identifier information to a set of UEs, determine whether each UE in the set of UEs has received the broadcast information based on whether the identifier information is received from each UE in the set of UEs, and refrain from relaying the broadcast information upon determining that each UE in the set of UEs has received the broadcast information. In another aspect, the apparatus may receive broadcast information related to a second UE and a tag associated with the broadcast information from a third UE, relay the tag without the broadcast information to a set of UEs, receive a request for broadcast information from a third UE in the set of UEs, and relay the broadcast information to the third UE. In an aspect, the first, second and third UEs may be the same UE. In another aspect, the second and third UEs but not the first UE may be the same UE.