System and methods for low latency positioning using fast uplink signaling

    公开(公告)号:US11849371B2

    公开(公告)日:2023-12-19

    申请号:US17404874

    申请日:2021-08-17

    CPC classification number: H04W4/029 H04W4/025 H04W72/23

    Abstract: During a positioning session, a user equipment (UE) is provided with an early uplink grant to respond to a request for location service information from a location server. The location service information, for example, may be a request for positioning capabilities, a request for positioning measurements or a position estimate, and may be a request for a single, periodic or triggered location information. The early uplink grant may be requested by the UE prior to needing the uplink grant, e.g., before the positioning measurements have been completed. The location server may instigate the early uplink grant, e.g., at or near the same time that the location server sends the request for information to the UE. The early uplink grant may be used, e.g., during high priority or emergency related positioning sessions, in order to reduce delay in the UE providing a response to the request for location information.

    Efficient positioning enhancement for dynamic spectrum sharing

    公开(公告)号:US11044693B1

    公开(公告)日:2021-06-22

    申请号:US16869738

    申请日:2020-05-08

    Abstract: Techniques are provided for transmitting Positioning Reference Signals (PRSs) in cells supporting two different Radio Access Technologies (RATs), where the two RATs (e.g. 4G LTE and 5G NR) employ dynamic spectrum sharing. To avoid interference between the PRSs and between the two RATs, the PRSs may be time aligned to the same set of PRS positioning occasions, and may be assigned orthogonal characteristics such as different muting patterns, orthogonal code sequences, different frequency shifts or different frequency hopping. UEs supporting both RATs may be enabled to measure PRSs for both RATs. UEs supporting only one RAT (e.g. 4G LTE) may be enabled to measure PRSs for just this RAT. A location server such as an LMF, E-SMLC or SLP may provide assistance data to UEs, and request measurements from UEs, for PRSs in one or both RATs.

    Optimized observed time difference of arrival (OTDOA) in licensed-assisted access (LAA)

    公开(公告)号:US11483793B2

    公开(公告)日:2022-10-25

    申请号:US15960539

    申请日:2018-04-23

    Abstract: Disclosed are techniques for determining a location of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum. In an aspect, the UE measures a positioning reference signal (PRS) from a first evolved NodeB (eNB) for a first secondary cell (Scell) and a second PRS from a second eNB for a second Scell. The UE reports the first and second PRS measurements and the first and second PRS measurement times to a location server. In an aspect, the first and second PRS are configured according to a common PRS configuration. The location server also receives transmission times of the PRS signals from the first and second eNBs. Using the measurement and transmission times, the location server can associate the first PRS measurement to the first eNB and the second PRS measurement to the second eNB, thereby assisting the location server to obtain a location for the UE.

    Terrestrial wireless positioning in licensed and unlicensed frequency bands

    公开(公告)号:US10461847B2

    公开(公告)日:2019-10-29

    申请号:US15607409

    申请日:2017-05-26

    Abstract: Disclosed are techniques for determining a distance (or range) between a first wireless entity and a second wireless entity. In an aspect, the first wireless entity transmits a first positioning reference signaling (PRS) signal to the second wireless entity at a first time, where the first PRS signal is received by the second wireless entity at a second time, and receives a second PRS signal from the second wireless entity at a third time, where the second PRS signal is transmitted by the second wireless entity at a fourth time. The first wireless entity enables the distance to be determined by a location computing entity, for example, by a location server, based on the first, second, third, and fourth times. The first wireless entity may be a mobile device or a base station and the second wireless entity may be the other of the mobile device or base station.

    Method and apparatus for enhanced positioning in 5G-NR using DAOD and DAOA

    公开(公告)号:US11619702B2

    公开(公告)日:2023-04-04

    申请号:US16992847

    申请日:2020-08-13

    Abstract: The angle of departure (AOD) of directed beams, e.g., beamformed beams, transmitted by one or more base stations, such as a gNB, and the angle of arrival (AOA) of the directed beams received by a UE may be used to improve positioning accuracy by identifying Line Of Sight (LOS) beams and multi-path beams. The differential AOA (DAOA) of a directed beam pair may compared to the differential AOD (DAOD) of the directed beam pair. Matching DAOA and DAOD may be used as an indication that the directed beams in the beam pair are LOS with the UE, whereas a mis-match indicates one or both of the directed beams are multi-path. The location of the UE may be estimated using the measurement information, e.g., AOA, RTT, RSTD, etc., obtained from LOS directed beams.

    CACHING POSITIONING MEASUREMENT REPORTS
    9.
    发明申请

    公开(公告)号:US20180317111A1

    公开(公告)日:2018-11-01

    申请号:US15582690

    申请日:2017-04-30

    Abstract: Techniques are disclosed for optimizing performance of positioning measurements. In an aspect, a wireless mobile device receives a positioning measurements request indicating a plurality of cells of a cellular network to be measured by the wireless mobile device, and, for each cell of the plurality of cells having an entry in a memory of the wireless mobile device: based on an indicator indicating that previous positioning measurements for the cell are valid, retrieves the previous positioning measurements for the cell from the memory of the wireless mobile device and sends the previous positioning measurements for the cell to the location server, and, based on the indicator indicating that the previous positioning measurements for the cell are not valid, performs new positioning measurements for the cell and sends the new positioning measurements for the cell to the location server.

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