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公开(公告)号：US11893843B2
公开(公告)日：2024-02-06
申请号：US17450088
申请日：2021-10-06
Applicant: NXP B.V.
Inventor： Michael Schober , Christian Eisendle , Stefan Lemsitzer
CPC classification number: G07C9/00309 , H04W64/003 , G07C2009/00333 , H04W72/56
Abstract: In accordance with a first aspect of the present disclosure, a communication node is provided, comprising: an ultra-wideband (UWB) communication unit configured to enable UWB communication with a plurality of external communication nodes; a processing unit configured to perform ranging sessions between the communication node and said external communication nodes, wherein said ranging sessions comprise one or more distance measurements based on messages exchanged through the UWB communication unit between the communication node and said external communication nodes; and a prioritization unit configured to prioritize said ranging sessions in dependence on at least one previously measured distance between the communication node and the respective external communication nodes. In accordance with a second aspect of the present disclosure, a method of operating a communication node is provided. In accordance with a third aspect of the present disclosure, a computer program is provided, comprising executable instructions for carrying out said method.
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公开(公告)号：US20200242313A1
公开(公告)日：2020-07-30
申请号：US16260320
申请日：2019-01-29
Applicant: NXP B.V.
Inventor： Stefan Lemsitzer , Marc Vauclair
Abstract: A method is provided for authenticating a device in a system having a blockchain. The method includes executing a one-side authentication of the device. The results of the one-side authentication are submitted to the blockchain at a first blockchain node of a plurality of blockchain nodes. The one-side authentication is later verified at a second blockchain node of the plurality of blockchain nodes. The device may be a tag in a radio frequency identification (RFID) system.
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公开(公告)号：US11743091B2
公开(公告)日：2023-08-29
申请号：US17661072
申请日：2022-04-28
Applicant: NXP B.V.
Inventor： Pablo Corbalán Pelegrín , Michael Schober , Srivathsa Masthi Parthasarathi , Stefan Lemsitzer
CPC classification number: H04L27/2657 , H04J3/0638 , H04L7/0037 , H04W56/0035
Abstract: A method of estimating a clock frequency offset in a mobile device relative to a clock frequency of a controller within a UWB network comprises (a) determining, for each of a plurality of anchors, an anchor clock frequency offset relative to the controller clock frequency, (b) broadcasting an anchor data packet from each anchor, the anchor data packet including the respective anchor clock frequency offset, (c) receiving at least one anchor data packet at the mobile device, (d) estimating a mobile device clock frequency offset relative to the anchor clock frequency of the anchor from which the at least one anchor data packet was received, and (e) estimating the clock frequency offset in the mobile device based on the estimated mobile device clock frequency offset and the anchor clock frequency offset included in the at least one received anchor data packet. Furthermore, a TDoA-based localization method and a TDoA-based localization system are described.
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公开(公告)号：US20220330016A1
公开(公告)日：2022-10-13
申请号：US17851609
申请日：2022-06-28
Applicant: NXP B.V.
Inventor： Marcel Medwed , Stefan Lemsitzer
IPC: H04W12/02 , H04W12/0433 , H04W12/069 , H04L9/32 , H04L9/40
Abstract: Various embodiments relate to a method and system for resuming a secure communication session with a server by a device, including: sending a message to the server requesting the resumption of a secure communication session; receiving from the server a server identifier, a server nonce, and a salt; determining that the device has a shared key with the server based upon the server identifier; determining that the received salt is valid; calculating a salted identifier based upon the shared key and the salt; sending the salted identifier to the server; and resuming the secure communication session with the server.
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公开(公告)号：US20220256338A1
公开(公告)日：2022-08-11
申请号：US17649247
申请日：2022-01-28
Applicant: NXP B.V.
Inventor： Srivathsa Masthi Parthasarathi , Stefan Lemsitzer
IPC: H04W12/037 , H04L9/40 , H04W12/0431 , H04L9/08
Abstract: Disclosed is a UWB communication node comprising: a UWB communication unit configured to transmit one or more messages, to a plurality of external responder nodes and comprising a ranging control message defining a contention period, and further configured to receive one or more responses from said responder nodes during said contention period, each response including a response payload; a processor unit configured to use a common cryptographic session key to encrypt said messages; wherein the processing unit is further configured to use responder-specific session keys to decrypt the response payloads; wherein each individual one of said responder-specific cryptographic session keys is a unique key shared between the node and one of the external responder nodes. Corresponding systems methods and an associated computer program are also disclosed.
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Patent Agency Ranking
公开(公告)号：US20230341506A1
公开(公告)日：2023-10-26
申请号：US17728866
申请日：2022-04-25
Applicant: NXP B.V.
Inventor： Ghiath Al-kadi , Stefan Lemsitzer
CPC classification number: G01S5/145 , G01S5/10 , G01S5/06 , H04W64/006
Abstract: A method, a system, and a device for wireless localization are disclosed. In an embodiment, the method includes performing, by a localization device, Two-Way Ranging (TWR) and Time Difference of Arrival (TDOA) in parallel, where the TWR is performed with a receiving device to determine a distance between the localization device and the receiving device, and the TDOA is performed with anchors to determine a geolocation of the localization device, and determining, using the distance and the geolocation, a position of the localization device relative to the receiving device.
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公开(公告)号：US11412373B2
公开(公告)日：2022-08-09
申请号：US16839719
申请日：2020-04-03
Applicant: NXP B.V.
Inventor： Marcel Medwed , Stefan Lemsitzer
IPC: H04W12/02 , H04W12/0433 , H04W12/069 , H04L9/32 , H04L9/40
Abstract: Various embodiments relate to a method and system for resuming a secure communication session with a server by a device, including: sending a message to the server requesting the resumption of a secure communication session; receiving from the server a server identifier, a server nonce, and a salt; determining that the device has a shared key with the server based upon the server identifier; determining that the received salt is valid; calculating a salted identifier based upon the shared key and the salt; sending the salted identifier to the server; and resuming the secure communication session with the server.
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公开(公告)号：US20210360395A1
公开(公告)日：2021-11-18
申请号：US17302005
申请日：2021-04-21
Applicant: NXP B.V.
Abstract: In accordance with a first aspect of the present disclosure, an ultra-wideband communication node is provided, comprising: an ultra-wideband communication unit configured to transmit one or more messages to a plurality of external responder nodes and to receive one or more responses from said responder nodes; a processing unit configured to use a common cryptographic session key to encrypt said messages, wherein said common cryptographic session key is a key shared between the ultra-wideband communication node and all the external responder nodes; wherein the processing unit is further configured to use responder-specific cryptographic session keys to decrypt the responses and/or to encrypt further messages to the responder nodes, and wherein each individual one of said responder-specific cryptographic session keys is a key shared between the ultra-wideband communication node and one of the external responder nodes.
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公开(公告)号：US10762311B2
公开(公告)日：2020-09-01
申请号：US16260320
申请日：2019-01-29
Applicant: NXP B.V.
Inventor： Stefan Lemsitzer , Marc Vauclair
Abstract: A method is provided for authenticating a device in a system having a blockchain. The method includes executing a one-side authentication of the device. The results of the one-side authentication are submitted to the blockchain at a first blockchain node of a plurality of blockchain nodes. The one-side authentication is later verified at a second blockchain node of the plurality of blockchain nodes. The device may be a tag in a radio frequency identification (RFID) system.
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公开(公告)号：US12282106B2
公开(公告)日：2025-04-22
申请号：US18181645
申请日：2023-03-10
Applicant: NXP B.V.
Inventor： Sunil Dilipkumar Jogi , Purnank Harjivanbhai Ghumalia , Michael Schober , Stefan Lemsitzer , Srivathsa Masthi Parthasarathi , Guillaume Lepoittevin
Abstract: Disclosed are methods and devices for, UWB, ranging of a target using a plurality of antenna arrays. The method comprises: determining a first RSSI, from a first antenna of a first antenna arrays, and a second RSSI from a second antenna of a second antenna arrays; in response to the first RSSI being larger than the second RSSI, selecting the first antenna array, and selecting the second antenna array otherwise; using the selected antenna array, performing a UWB ranging measurement including measuring an angle of arrival of the signal from the target; including, if the angle of arrival of the signal from the target is out of range: selecting a different one of the plurality of antennae arrays, as a presently-selected antenna array; and, using that antenna array, performing a UWB ranging measurement including measuring an angle of arrival of the signal from the target.
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