公开(公告)号：US20210159938A1

公开(公告)日：2021-05-27

申请号：US17085311

申请日：2020-10-30

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Atmaram Kota Rajaram ,  Nidhin Vadakkan ,  Hendrik Ahlendorf ,  Brima Babatunde Ibrahim

IPC: H04B1/7073

Abstract: A method is described synchronization in a communication system which comprises a master anchor device, a first anchor device, and a second anchor device. The method comprises: i) transmitting, by the master anchor device, a first message to the first anchor device and to the second anchor device using a first ultra-wide band (UWB) communication, wherein the first message is indicative of a master clock of the master anchor device receiving, by the first anchor device, the first message, and synchronizing a first clock of the first anchor device based on the master clock, and iii) receiving, by the second anchor device, the first message, and synchronizing a second clock of the second anchor device based on the master clock. Furthermore, a communication system and a use of UWB communication is described.

公开(公告)号：US11722171B2

公开(公告)日：2023-08-08

申请号：US17455437

申请日：2021-11-18

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Abdul Wahid Abdul Kareem ,  Shengyang Xu ,  Atmaram Kota Rajaram ,  Ajay A Jampale

IPC: H04B1/7176 ,  H04B1/7183

CPC classification number: H04B1/7176 ,  H04B1/7183

Abstract: UWB ranging methods and apparatus are disclosed. The method comprises a ranging communication with a plurality of responder devices, the ranging communication comprising: transmitting, by an initiator device, a polling signal in a time slot; receiving a respective response from each of the plurality of responder devices, overlapping and in a next time slot, each response comprising: synchronization bits, and a frame comprising Start of Frame Delimiter, and a Scrambled Timestamp Sequence; wherein the STS comprises a sequence of segments each preceded by a respective guard interval, wherein a specific one of the segments comprises data derived from a ranging key and a responder-identifier each unique to the respective responder among the plurality of responders, wherein a sequence-number of the specific segment is unique to the respective response, and wherein a remainder of the segments each comprise the same data derived from a predetermined common key and predetermined common data.

公开(公告)号：US11411599B2

公开(公告)日：2022-08-09

申请号：US17085311

申请日：2020-10-30

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Atmaram Kota Rajaram ,  Nidhin Vadakkan ,  Hendrik Ahlendorf ,  Brima Babatunde Ibrahim

IPC: H04B1/7073

Abstract: A method is described synchronization in a communication system which comprises a master anchor device, a first anchor device, and a second anchor device. The method comprises: i) transmitting, by the master anchor device, a first message to the first anchor device and to the second anchor device using a first ultra-wide band (UWB) communication, wherein the first message is indicative of a master clock of the master anchor device receiving, by the first anchor device, the first message, and synchronizing a first clock of the first anchor device based on the master clock, and iii) receiving, by the second anchor device, the first message, and synchronizing a second clock of the second anchor device based on the master clock. Furthermore, a communication system and a use of UWB communication is described.

公开(公告)号：US20220200656A1

公开(公告)日：2022-06-23

申请号：US17455437

申请日：2021-11-18

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Abdul Wahid Abdul Kareem ,  Shengyang Xu ,  Atmaram Kota Rajaram ,  Ajay A. Jampale

IPC: H04B1/7176 ,  H04B1/7183

Abstract: UWB ranging methods and apparatus are disclosed. The method comprises a ranging communication with a plurality of responder devices, the ranging communication comprising: transmitting, by an initiator device, a polling signal in a time slot; receiving a respective response from each of the plurality of responder devices, overlapping and in a next time slot, each response comprising: synchronization bits, and a frame comprising Start of Frame Delimiter, and a Scrambled Timestamp Sequence; wherein the STS comprises a sequence of segments each preceded by a respective guard interval, wherein a specific one of the segments comprises data derived from a ranging key and a responder-identifier each unique to the respective responder among the plurality of responders, wherein a sequence-number of the specific segment is unique to the respective response, and wherein a remainder of the segments each comprise the same data derived from a predetermined common key and predetermined common data.

公开(公告)号：US10903868B2

公开(公告)日：2021-01-26

申请号：US16718061

申请日：2019-12-17

Applicant: NXP B.V.

Inventor： Hugues Jean Marie de Perthuis ,  Frank Leong ,  Sören Heisrath ,  Diwakar Subraveti ,  Srivathsa Masthi Parthasarathi

IPC: H04B1/3822 ,  H04W4/02 ,  H04W4/021 ,  G01S13/74 ,  G07C9/00

Abstract: Disclosed is a RF system (100) having at least one transceiver node device (110, 112, 114, 116, 118, 120) that is capable to assume, at a controllable point in time and/or for a controllable time period, each one of the following roles (210, 220, 230, 240): a first role (210) comprising listening or answering to a message from an active communication session, in particular ranging sessions, a second role (220) comprising listening for new communication sessions, in particular ranging sessions, a third role (230) comprising staying idle, and optionally a third role (230) comprising scanning for ongoing communication sessions, in particular ranging sessions, of other RF systems. The RF system (100) further comprises a controller device (134) communicatively interlinked with the at least one, in particular each, transceiver node device (110, 112, 114, 116, 118, 120) and capable to control an assignment of roles to the at least one, in particular each, transceiver node device, in particular to control for a transceiver node device a point in time to assume a role and/or a duration of performing a role and/or a duty cycle of performing a role (210, 220, 230, 240).

公开(公告)号：US20200226865A1

公开(公告)日：2020-07-16

申请号：US16737167

申请日：2020-01-08

Applicant: NXP B.V.

Inventor： Hugues Jean Marie de Perthuis ,  Frank Leong ,  Diwakar Subraveti ,  Sören Heisrath ,  Srivathsa Masthi Parthasrathi

IPC: G07C9/20 ,  H04B1/7103 ,  G07C9/00 ,  G01S13/76

Abstract: An Ultra-Wideband (UWB) wireless communication device includes a scanning circuit, an ordering circuit, and a selecting circuit. The scanning circuit is configured for scanning at least a channel supported by the communication device for detecting a plurality of patterns of a UWB frame format. The ordering circuit is configured for ordering the plurality of patterns in a patterns list according to a predefined quality parameter. The selecting circuit is configured for selecting at least one of the patterns in the list to start an Ultra Wideband (UWB) wireless communications.