System and methods for rapid round-trip-time measurement distribution

    公开(公告)号:US11606705B2

    公开(公告)日:2023-03-14

    申请号:US16526546

    申请日:2019-07-30

    Abstract: Disclosed are techniques for determining round-trip time (RTT) of a user equipment (UE). In an aspect, each gNodeB in a plurality of gNodeBs measure signaling data related to an uplink RTT reference signal received from the UE and the downlink RTT reference signal transmitted by each gNodeB. The signaling data comprises one of a processing delay between a time of arrival (TOA) of the uplink RTT reference signal and a time of transmission (TOT) of the downlink RTT reference signal or a total RTT between the TOT of the downlink RTT reference signal and the TOA of the uplink RTT reference signal. The signaling data is sent to a single entity, other than the UE, e.g., another gNodeB or a location server, where signaling data relevant to the UE is aggregated. The aggregated signaling data may be sent to the UE to determine the RTT for the UE or used by the location server to determine the RTT for the UE.

    METHOD AND APPARATUS FOR ACQUISITION OF RELIABLE TIME IN A WIRELESS NETWORK

    公开(公告)号:US20230032067A1

    公开(公告)日:2023-02-02

    申请号:US17386325

    申请日:2021-07-27

    Abstract: Accurate and reliable time is acquired by a user equipment (UE) from a base station in a wireless network. The base station may obtain the time, e.g., UTC time or a GNSS time, and ciphers at least a portion of the time before broadcasting the time. The UE determines a propagation delay between the UE and the base station based on a timing advance, known locations of the UE and the base station, or a measured round trip propagation time (RTT) between the UE and the base station. A corrected time can be determined based on the time received from the base station and the propagation delay. A digital signature included with the time broadcast by the base station increases reliability. Spoofing of the broadcast time by an attacking device may be detected by the UE based on the propagation delay being outside an expected range.

    Systems and methods for supporting control plane location in a fifth generation wireless network

    公开(公告)号:US11470446B2

    公开(公告)日:2022-10-11

    申请号:US16669416

    申请日:2019-10-30

    Abstract: Methods and techniques are described for supporting location services for a user equipment (UE) in a Fifth Generation wireless network using a Location Management Function (LMF) based control plane (CP) location solution. The LMF serves as the main anchor point for location support instead of an Access and Mobility Management Function (AMF). The LMF may be in either a serving Public Land Mobile Network (PLMN) for a UE or in a Home PLMN for a roaming UE. The LMF may obtain location information for a UE via an AMF from a Next Generation Radio Access Network or the UE and may interact with a Gateway Mobile Location Center to receive location requests from and return location information to an external client. The LMF solution may be more efficient and require less implementation than an AMF based CP location solution.

    Location of a mobile device with 5G wireless access using SUPL

    公开(公告)号:US11350271B2

    公开(公告)日:2022-05-31

    申请号:US16588978

    申请日:2019-09-30

    Abstract: Techniques described herein provide means by which cell information indicative of a location of a UE may be conveyed to a location server over a 5G NR data connection using a SUPL message with an LTE cell ID data field. In some embodiments, for example, the UE may include the Cell ID of a LTE neighbor cell or information regarding a 5G NR serving cell, such as a portion of the 5G NR Cell ID or a reserved value or sequence identifying the 5G NR serving cell. The techniques may be applicable to the Secure User Plane Location (SUPL) solution defined by OMA and may enable a UE and a SUPL Location Platform (SLP) to support location of the UE using a version of SUPL without explicit support of 5G NR wireless access.

    METHOD AND APPARATUS FOR LOCATION OF A USER EQUIPMENT IN AN INACTIVE STATE

    公开(公告)号:US20220120842A1

    公开(公告)日:2022-04-21

    申请号:US17499475

    申请日:2021-10-12

    Abstract: Positioning of a UE is supported in a Radio Resource Control (RRC) Inactive state. The UE receives a request for periodic or triggered location and enters the RRC Inactive state. When an event is detected, the UE sends an RRC Resume Request to a gNB that includes an indication of the event. The indication may be an event report that may include downlink positioning measurements. The gNB forwards the event report to a location server, and may later receive and return an event report acknowledgement to the UE in an RRC Release. The indication may instead trigger uplink positioning, with the base station sending an uplink Sounding Reference Signal (SRS) configuration to the UE in an RRC Release, causing the UE to transmit uplink SRS signals to be measured by gNBs. For uplink related position methods like RTT, the gNB can receive both types of indication.

    SYSTEM AND METHODS FOR LOW LATENCY POSITIONING USING FAST UPLINK SIGNALING

    公开(公告)号:US20220060853A1

    公开(公告)日:2022-02-24

    申请号:US17404874

    申请日:2021-08-17

    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.

    Systems and methods for efficient positioning of a mobile device with dual wireless connectivity

    公开(公告)号:US11259146B2

    公开(公告)日:2022-02-22

    申请号:US16368058

    申请日:2019-03-28

    Abstract: A user equipment (UE) has dual connectivity to a first Radio Access Technology (RAT) and a second RAT, such as Long Term Evolution (LTE) and New Radio (NR). The UE receives a request for location information for the first and second RATs, e.g., after transmitting capability information indicating dual connectivity. The UE obtains location information for the first and second RATs and transmits the location information to a location server. The location information, for example, may be location measurements obtained for the first and second RATs, a location estimate, or both. The request for location information may be received using the first RAT and the location information may be transmitted using the second RAT. The request for location information may include a first request for the first RAT, and a second request for the second RAT received after location information for the first RAT is obtained.

    METHODS AND APPARATUS FOR LOW LATENCY LOCATION VIA SCHEDULING IN ADVANCE

    公开(公告)号:US20220039053A1

    公开(公告)日:2022-02-03

    申请号:US17389178

    申请日:2021-07-29

    Abstract: Latency in location of a user equipment (UE) is reduced by requesting and scheduling the location of the UE in advance of the time of when it is needed. A positioning request from an external client or the UE may indicate the time that the location is to be determined or measured. A location management function (LMF) may manage and coordinate location measurements for the UE prior to the location determination time. The LMF may schedule downlink and/or uplink measurements to be performed at the desired time. Either the LMF or a location server associated with a serving base station for the UE may be assigned to receive positioning measurements and obtain the location of the UE. The location server or LMF may send the location to the UE or the external client. User plane transport may be used to further reduce latency.

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