Abstract:
Techniques described herein provide ways in which a quantity of signaling may be limited between a user equipment (UE) and a location server (LS) for a location session and a positioning protocol such as LPP or LPP/LPPe. The positioning protocol may be enhanced to allow the LS to indicate to the UE a limit on the overall size of assistance data (AD) that the UE can request and/or a limit on the overall amount of location information (LI) that the UE can return. A recipient UE can then prioritize any request for AD such that more important AD should fit within the size limit. The recipient UE can also prioritize returned location measurements such that more useful measurements are included in a message to the LS that is compliant to the limit indicated by the LS.
Abstract:
Disclosed embodiments facilitate UE location determination in systems with dense PRS configurations, reduced PRS periodicity, frequency hopping, and involving UE inter-frequency measurements. The techniques may be applied to Bandwidth reduced-Low complexity (BL) UEs, or enhanced Machine Type Communication (eMTC) UEs or Further enhanced MTC (FeMTC) UEs and/or in LTE-M systems. A method on a UE may comprise: receiving a Reference Signal Time Difference (RSTD) measurement request; transmitting, in response to the RSTD measurement request, a dedicated gap request comprising a requested configuration of dedicated gaps; and receiving, in response to the dedicated gap request, a message comprising a dedicated gap configuration. The dedicated gap request may comprise a request for dedicated measurement gaps and the message may comprise a dedicated measurement gap configuration. In some embodiments, the dedicated gap request may comprise a request for dedicated autonomous gaps and the message may comprise a dedicated autonomous gap configuration.
Abstract:
Disclosed are techniques for positioning a user equipment (UE). In an aspect, a location server receives a first propagation time measurement and a first plurality of OTDOA RSTD measurements from a first UE at a first time, receives a second propagation time measurement and a second plurality of OTDOA RSTD measurements from a second UE at a second time, determines at least one real-time difference between a pair of base stations based on the first and second propagation time measurements and the first and second pluralities of OTDOA RSTD measurements, wherein the pair of base stations is associated with the first and second pluralities of OTDOA RSTD measurements, receives a third plurality of OTDOA RSTD measurements from a third UE at a third time, and determines a position of the third UE based at least in part on the at least one real-time difference between the pair of base stations.
Abstract:
A method for use in a server comprising a computing platform comprising obtaining a first measurement of a time difference of arrival between a first positioning signal and a second positioning signal, the first positioning signal having and second positioning signal having been transmitted at different frequencies, obtaining a measurement description from the mobile device, in response to a determination that the measurement description indicates that the first measurement has not been compensated, by the mobile device, for inter-frequency related delays corresponding to the first frequency, the second frequency, or both the first frequency and the second frequency determining an inter-frequency bias compensation for the inter-frequency related delays corresponding to the first measurement, applying the inter-frequency bias compensation to the first measurement to generate a compensated measurement, and determining, at least in part, a position of the mobile device based, at least in part, on the compensated measurement.
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:
Systems, methods, apparatuses, and computer-readable media for providing radio frequency interference (RFI) awareness assistance data to global navigation satellite system (GNSS) receivers are described. In some embodiments, a first method includes receiving at a location server RFI situational information. The first method further includes maintaining at least one time and location dependent database of an RFI situation. The first method further includes sending at least one assistance data message to at least one receiver including the RFI situational information. In another embodiment, a second method includes receiving RFI awareness assistance data from a location server. The second method further includes adapting a position location measurement according to the received RFI awareness assistance data. The second method further includes calculating a location of the receiver based at least in part on the adapted position location measurement.
Abstract:
A radio frequency sensing method includes: receiving, at a sensing apparatus from a network entity, a configuration message indicating a positioning reference signal configuration of a positioning reference signal; receiving, at the sensing apparatus from the network entity, a measurement indication indicating that the positioning reference signal is for radio frequency sensing; and measuring, at the sensing apparatus, the positioning reference signal to determine one or indicating a positioning reference signal more radio frequency sensing measurements based on the measurement indication indicating that the positioning reference signal is for radio frequency sensing.
Abstract:
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) obtains, from a first cell, a first downlink reference timing and a first reference signal received power (RSRP) measurement, wherein the first RSRP measurement is a first reference RSRP, determines that the first downlink reference timing has changed based on a cell reselection from the first cell to the second cell performed while in a radio resource control (RRC) non-connected state, and obtains, from the second cell, while in the RRC non-connected state, based on the first downlink reference timing having changed more than a threshold, a second downlink timing and a second RSRP measurement, wherein the second RSRP measurement is a second reference RSRP.
Abstract:
In an aspect, a target user equipment performs positioning. For example, the target user equipment receives a control message from a network entity. The control message identifies a set of measurement time windows in which to perform measurements of one or more signals. The target user equipment performs the measurements of the one or more signals within the set of measurement time windows and transmits a measurement report to the network entity. The measurement report comprises the measurements of the one or more signals performed within the set of measurement time windows.
Abstract:
Disclosed are techniques for sidelink positioning. In an aspect, an initiator user equipment (UE) transmits a first request to create a sidelink positioning protocol (SLPP) session to each recipient UE among a set of one or more recipient UEs, and receives first responses from the set of one or more recipient UEs that each indicate an acceptance or rejection of the SLPP session by the recipient. A group of one or more UEs for participation in the SLPP session is determined by the initiator UE from among recipient UEs from which a respective first response that indicates the acceptance of the SLPP session is received. In another aspect, a UE transmitting an SLPP message may indicate a first casting mode (e.g., unicast, groupcast, broadcast, etc.) of the SLPP message and may optionally indicate a second casting mode (e.g., unicast, groupcast, broadcast, etc.) for response(s) to the SLPP message.