公开(公告)号：US20230266425A1

公开(公告)日：2023-08-24

申请号：US18020472

申请日：2020-08-13

Applicant: Telefonaktiebolaget LM Ericsson (PUBL)

Inventor： Magnus SANDGREN ,  Satyam DWIVEDI ,  Garry IRVINE ,  Sara SANDBERG ,  Alexander HUNT

IPC: G01S5/02 ,  H04W64/00

CPC classification number: G01S5/0218 ,  G01S5/0244 ,  H04W64/00

Abstract: Methods and apparatus are provided. In an example aspect, a method (300, 400, 500) of estimating a location of a User Equipment (UE) is provided. The method comprises determining (302) whether a signal transmitted between the UE and a first network node has a line-of-sight (LoS) path between the UE and the first network node, and estimating (304) the location of the UE based on the signal received at the first network node and based on whether the signal has a LoS path.

公开(公告)号：US20180132199A1

公开(公告)日：2018-05-10

申请号：US15573570

申请日：2015-07-17

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Chunhui ZHANG ,  Angelo CENTONZA ,  Garry IRVINE ,  Mikael OLOFSSON ,  Magnus SANDGREN

IPC: H04W56/00 ,  H04L5/14 ,  H04W72/04

CPC classification number: H04W56/002 ,  H04L5/1469 ,  H04W56/001 ,  H04W56/0065 ,  H04W72/0446

Abstract: A method and nodes for wireless timing synchronization of a target node and a source node. In some embodiments, a request is sent to a source node for time synchronizing the target node with the source node. A first time, T1, indicative of time of transmission of a first radio signal from the source node to the target node is determined. A second time, T2, indicative of time of receipt of the first radio signal at the target node is determined. A third time, T3, indicative of time of transmission of a second radio signal from the target node to the source node is determined. A fourth time, T4, indicative of time of receipt of the second radio signal at the source node is determined. A clock offset based on T1, T2, T3 and T4 for use in time synchronizing the target node with the source node is determined.

公开(公告)号：US20160248529A1

公开(公告)日：2016-08-25

申请号：US15145849

申请日：2016-05-04

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Garry IRVINE

IPC: H04J3/06 ,  H04W56/00

CPC classification number: H04J3/0661 ,  H04J3/0641 ,  H04J3/0658 ,  H04W56/001 ,  H04W56/0015

Abstract: Networks, network devices and methods of synchronization using transfer of synchronization packets are provided. Some network devices are configured to use either a timing reference extracted based on GPS signals or an imported timing reference, as an operative time reference. A network device from which to import the time reference is selected and may be updated to meet a selection rule related to the quality of receiving the transfer of synchronization packets.

Abstract translation: 提供网络，网络设备和使用同步数据包传输的同步方法。 一些网络设备被配置为使用基于GPS信号或导入的定时参考提取的定时参考作为操作时间参考。 选择从其导入时间基准的网络设备，并且可以更新网络设备以满足与接收同步分组传输的质量相关的选择规则。

公开(公告)号：US20250020756A1

公开(公告)日：2025-01-16

申请号：US18713874

申请日：2021-11-30

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Garry IRVINE ,  Roland SMITH ,  Edwin IUN

IPC: G01S5/02 ,  G01S5/06

Abstract: A method and network node for relative positioning measurements of wireless device (WD) locations are disclosed. According to one aspect, a method includes phase-locking a plurality of antenna reference points (ARPs), using a synchronous clock, allowing an accuracy of spatial coordinate estimates to be reduced while increasing their precision. The method includes determining time difference of arrival values based at least in part on applying weights to signals received from antennas of a subset of the plurality of phase-locked ARPs to further increase a precision of the spatial coordinate estimates. The method also includes estimating the spatial coordinates by applying timing error corrections to the time difference of arrival values to increase accuracy of the spatial coordinate estimates while maintaining the precision of the spatial coordinate estimates above the second precision level.

公开(公告)号：US20170108579A1

公开(公告)日：2017-04-20

申请号：US15129268

申请日：2014-03-28

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Garry IRVINE ,  Peter DEANE

IPC: G01S5/08 ,  H01Q3/36

Abstract: A method, user equipment (UE) and location server for estimating position of a UE based on observed angles of arrival. According to one embodiment, angles of arrival of signals from a plurality of base stations are received by a UE are observed by scanning for position reference signals (PRS) by adjusting a phase difference between antennas to cause a null of a beam of the UE to be incremented through an angular sector. For each of a plurality of base stations, an angle of arrival at which the null is steered when a PRS is suppressed by the null and a reference signal time difference, RSTD, are determined. Each angle of arrival and corresponding RSTD is transmitted to a location server which estimates UE position based on the observed angles of arrival. Further, the location server may instruct the UE to suppress a non-line-of-sight PRS signal.