公开(公告)号：US11770700B2

公开(公告)日：2023-09-26

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

CPC classification number: H04W12/02 ,  H04L9/3236 ,  H04L63/0869 ,  H04W12/0433 ,  H04W12/069

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.

公开(公告)号：US20220385519A1

公开(公告)日：2022-12-01

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

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

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.

公开(公告)号：US20220139133A1

公开(公告)日：2022-05-05

申请号：US17450088

申请日：2021-10-06

Applicant: NXP B.V.

Inventor： Michael Schober ,  Christian Eisendle ,  Stefan Lemsitzer

IPC: G07C9/00 ,  H04W64/00

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.

公开(公告)号：US20210306852A1

公开(公告)日：2021-09-30

申请号：US16829401

申请日：2020-03-25

Applicant: NXP B.V

Inventor： Marcel Medwed ,  Pim Vullers ,  Joost Roland Renes ,  Stefan Lemsitzer

IPC: H04W12/06 ,  H04L9/32 ,  H04W12/00

Abstract: A method is provided for authenticating one device to another device. In the method, a first device proves to a second device that a first credential comprising multiple first attributes is valid. The second device proves to the first device that a second credential comprising multiple second attributes is valid. The first device reveals a first attribute of the multiple first attributes to the second device. The second device verifies the first attribute and decides whether to continue revealing attributes. If continuing, the second device reveals to the first device a first attribute of the multiple second attributes. The first device verifies the first attribute of the multiple second attributes. The first device decides whether to continue revealing attributes. Attributes can be revealed until one of the first or second devices end the method or until no attributes of the multiple first and second attributes remain to be revealed.

公开(公告)号：US08701077B1

公开(公告)日：2014-04-15

申请号：US13710291

申请日：2012-12-10

Applicant: NXP B.V.

Inventor： Stefan Lemsitzer ,  Heimo Scheucher ,  Claus Grzyb

IPC: G06F17/50

CPC classification number: G11C17/10 ,  G11C7/24 ,  G11C8/20 ,  H01L27/112

Abstract: Aspects of the present disclosure are directed toward methods and systems which generate a plurality of Read-Only Memory (ROM) codes. In response to generating the ROM codes, an image is generated for each of the plurality of ROM codes. The images for each of the plurality of ROM codes are mapped on a single reticle, and a wafer is provided, which includes a plurality of individual devices. The reticle is utilized, which includes an image for each of the plurality of ROM codes, to print a respective one of the images onto a respective one of the plurality of individual devices.

Abstract translation: 本公开的方面涉及生成多个只读存储器（ROM）代码的方法和系统。 响应于产生ROM代码，为多个ROM代码中的每一个生成图像。 多个ROM代码中的每一个的图像被映射在单个掩模版上，并且提供包括多个单独器件的晶片。 使用掩模版，其包括用于多个ROM代码中的每一个的图像，以将相应的一个图像打印到多个单独设备中的相应一个上。