公开(公告)号：US20190036631A1

公开(公告)日：2019-01-31

申请号：US16046877

申请日：2018-07-26

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04L27/26 ,  H04L7/033 ,  H04W56/00

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first timestamp indicating a first time T1 timestamp a second time indication indicating a second time T2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time T3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time T4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter   offset = ( TS   1 + TS   4 - TS   3 - TS   2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US20180198599A1

公开(公告)日：2018-07-12

申请号：US15913847

申请日：2018-03-06

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic

IPC: H04L7/00 ,  G06F1/10 ,  H04L12/26 ,  H04J3/06 ,  G06F1/12

CPC classification number: H04L7/0033 ,  G06F1/10 ,  G06F1/12 ,  H04J3/0667 ,  H04L43/0852

Abstract: An exemplary method of synchronizing a master clock and a slave clock comprises transmitting a plurality of packets between a master device and a slave device, calculating a first skew between a first pair of the plurality of packets at the slave device and a second skew between the first pair at the master device, calculating a ratio between the first skew and the second skew, providing a slave clock frequency correction to the slave device, calculating a first packet trip delay using a time that the master device initiates sending a packet to the slave device, a time the master device receives a response from the slave device, a corrected time the slave device receives the packet, and a corrected time the slave device initiates sending the response, calculating a first offset based on the first packet trip delay, and providing the first offset to the slave device.

公开(公告)号：US20180198598A1

公开(公告)日：2018-07-12

申请号：US15913833

申请日：2018-03-06

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic

IPC: H04L7/00 ,  G06F1/10 ,  H04L12/26 ,  H04J3/06 ,  G06F1/12

CPC classification number: H04L7/0033 ,  G06F1/10 ,  G06F1/12 ,  H04J3/0667 ,  H04L43/0852

Abstract: An exemplary method of synchronizing a master clock and a slave clock comprises transmitting a plurality of packets between a master device and a slave device, calculating a first skew between a first pair of the plurality of packets at the slave device and a second skew between the first pair at the master device, calculating a ratio between the first skew and the second skew, providing a slave clock frequency correction to the slave device, calculating a first packet trip delay using a time that the master device initiates sending a packet to the slave device, a time the master device receives a response from the slave device, a corrected time the slave device receives the packet, and a corrected time the slave device initiates sending the response, calculating a first offset based on the first packet trip delay, and providing the first offset to the slave device.

公开(公告)号：US11777829B2

公开(公告)日：2023-10-03

申请号：US17857935

申请日：2022-07-05

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic ,  Tadej Markovic

IPC: H04L43/106 ,  H04L47/2466 ,  H04L27/26 ,  H04J3/06 ,  H04W56/00 ,  H04L43/0852

CPC classification number: H04L43/106 ,  H04J3/0667 ,  H04J3/0673 ,  H04J3/0697 ,  H04L27/2657 ,  H04L47/2466 ,  H04W56/00 ,  H04W56/001 ,  H04L43/0852

Abstract: An example method comprises receiving, by a first PHY of a first transceiver, a timing packet, timestamping, by the first transceiver, the timing packet and providing the timing packet to a first intermediate node, determining a first offset between the first intermediate node and the first transceiver, updating a first field within the timing packet with the first offset between the first intermediate node and the first transceiver, the offset being in the direction of the second transceiver, receiving the timing packet by a second transceiver, the timing packet including the first field, information within the first field being at least based on the first offset, determining a second offset between the second transceiver and an intermediate node that provided the timing packet to the second transceiver and correcting a time of the second transceiver based on the information within the first field and the second offset.

公开(公告)号：US20230097554A1

公开(公告)日：2023-03-30

申请号：US17857935

申请日：2022-07-05

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic ,  Tadej Markovic

IPC: H04L43/106 ,  H04L47/2466 ,  H04L27/26 ,  H04J3/06 ,  H04W56/00

Abstract: An example method comprises receiving, by a first PHY of a first transceiver, a timing packet, timestamping, by the first transceiver, the timing packet and providing the timing packet to a first intermediate node, determining a first offset between the first intermediate node and the first transceiver, updating a first field within the timing packet with the first offset between the first intermediate node and the first transceiver, the offset being in the direction of the second transceiver, receiving the timing packet by a second transceiver, the timing packet including the first field, information within the first field being at least based on the first offset, determining a second offset between the second transceiver and an intermediate node that provided the timing packet to the second transceiver and correcting a time of the second transceiver based on the information within the first field and the second offset.

公开(公告)号：US20230040503A1

公开(公告)日：2023-02-09

申请号：US17968273

申请日：2022-10-18

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04L7/033 ,  H04L27/26 ,  H04W56/00

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first time indication indicating a first time TS1, a second time indication indicating a second time TS2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time TS3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time TS4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter ⁢ offset = ( TS ⁢ 1 + TS ⁢ 4 - TS ⁢ 3 - TS ⁢ 2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US11476963B2

公开(公告)日：2022-10-18

申请号：US17121491

申请日：2020-12-14

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04W56/00 ,  H04L7/033 ,  H04L27/26

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first time indication indicating a first time TS1, a second time indication indicating a second time TS2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time TS3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time TS4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter ⁢ ⁢ offset = ( TS ⁢ ⁢ 1 + TS ⁢ ⁢ 4 - TS ⁢ ⁢ 3 - TS ⁢ ⁢ 2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US20210152268A1

公开(公告)日：2021-05-20

申请号：US17121491

申请日：2020-12-14

Applicant: Aviat U.S., Inc.

Inventor： Tadej Markovic ,  Janez Mihelic

IPC: H04J3/06 ,  H04W56/00 ,  H04L7/033 ,  H04L27/26

Abstract: An example system comprising a first transceiver configured to receive a request airframe from a second transceiver over a wireless link, the request airframe including a first time indication indicating a first time TS1, a second time indication indicating a second time TS2 that the request airframe was received, generate a respond airframe and including a third time indication indicating a third time TS3 that the respond airframe is transmitted to the second transceiver, transmit the respond airframe to the second transceiver, provide a timestamp information request to second transceiver, receive a timestamp information response, the timestamp information response including a fourth time indication indicating a fourth time TS4, calculate a counter offset using the first time, second time, third time and fourth time as follows: counter   offset = ( TS   1 + TS   4 - TS   3 - TS   2 ) 2 , calculate a phase offset based on the counter offset, and correct a phase of the first transceiver.

公开(公告)号：US10855569B2

公开(公告)日：2020-12-01

申请号：US16566747

申请日：2019-09-10

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic ,  Tadej Markovic

IPC: H04L12/26 ,  H04L12/855 ,  H04L27/26 ,  H04J3/06 ,  H04W56/00

Abstract: An example method comprises receiving, by a first PHY of a first transceiver, a timing packet, timestamping, by the first transceiver, the timing packet and providing the timing packet to a first intermediate node, determining a first offset between the first intermediate node and the first transceiver, updating a first field within the timing packet with the first offset between the first intermediate node and the first transceiver, the offset being in the direction of the second transceiver, receiving the timing packet by a second transceiver, the timing packet including the first field, information within the first field being at least based on the first offset, determining a second offset between the second transceiver and an intermediate node that provided the timing packet to the second transceiver and correcting a time of the second transceiver based on the information within the first field and the second offset.

公开(公告)号：US09912465B2

公开(公告)日：2018-03-06

申请号：US15138172

申请日：2016-04-25

Applicant: Aviat U.S., Inc.

Inventor： Janez Mihelic

IPC: G06F1/04 ,  G06F1/24 ,  G06F11/00 ,  H04L7/00 ,  G06F1/12 ,  H04J3/06 ,  G06F1/10 ,  H04L12/26

CPC classification number: H04L7/0033 ,  G06F1/10 ,  G06F1/12 ,  H04J3/0667 ,  H04L43/0852

Abstract: An exemplary method of synchronizing a master clock and a slave clock comprises transmitting a plurality of packets between a master device and a slave device, calculating a first skew between a first pair of the plurality of packets at the slave device and a second skew between the first pair at the master device, calculating a ratio between the first skew and the second skew, providing a slave clock frequency correction to the slave device, calculating a first packet trip delay using a time that the master device initiates sending a packet to the slave device, a time the master device receives a response from the slave device, a corrected time the slave device receives the packet, and a corrected time the slave device initiates sending the response, calculating a first offset based on the first packet trip delay, and providing the first offset to the slave device.