公开(公告)号：US12294963B2

公开(公告)日：2025-05-06

申请号：US18406881

申请日：2024-01-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ariton E. Xhafa ,  Jianwei Zhou ,  Xiaolin Lu

IPC: H04W56/00 ,  H04W76/25

Abstract: A network includes an intermediate node to communicate with a child node via a wireless network protocol. An intermediate node synchronizer in the intermediate node facilitates time synchronization with its parent node and with the child node. A child node synchronizer in the child node to facilitates time synchronization with the intermediate node. The intermediate node synchronizer exchanges synchronization data with the child node synchronizer to enable the child node to be time synchronized to the intermediate node before the intermediate node is synchronized to its parent node if the intermediate node has not synchronized to its parent node within a predetermined guard time period established for the child node.

公开(公告)号：US20240319313A1

公开(公告)日：2024-09-26

申请号：US18733008

申请日：2024-06-04

Applicant: Texas Instruments Incorporated

Inventor： Borja Martinez Huerta ,  Guillem Boquet Pujadas ,  Xavier Vilajosana Guillen ,  Anand Ganesh Dabak ,  Kaichien Tsai ,  Jianwei Zhou ,  Danil Shalumov

IPC: G01S5/02 ,  G01S5/04 ,  H04W64/00

CPC classification number: G01S5/0244 ,  G01S5/04 ,  H04W64/00

Abstract: In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.

公开(公告)号：US11902244B2

公开(公告)日：2024-02-13

申请号：US18170714

申请日：2023-02-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Alper S. Akyurek ,  Ariton E. Xhafa ,  Jianwei Zhou ,  Ramanuja Vedantham

IPC: H04L61/5014 ,  H04L61/5092 ,  H04L61/5007 ,  H04L101/604 ,  H04L101/659 ,  H04L101/668

CPC classification number: H04L61/5014 ,  H04L61/5092 ,  H04L61/5007 ,  H04L2101/604 ,  H04L2101/659 ,  H04L2101/668

Abstract: A network includes at least two nodes that employ a routing protocol to communicate across a network. One of the nodes is a parent node and another of the nodes is a child node of the parent node. An address generator assigns a unique network address to the child node by appending an address value of a number of bits to a parent address of the parent node to create the unique network address for the child node.

公开(公告)号：US11765749B2

公开(公告)日：2023-09-19

申请号：US17933245

申请日：2022-09-19

Applicant: Texas Instruments Incorporated

Inventor： Wonsoo Kim ,  Il Han Kim ,  Jianwei Zhou

IPC: H04W72/12 ,  H04W72/30 ,  H04L67/1097 ,  H04L101/622

CPC classification number: H04W72/30 ,  H04L67/1097 ,  H04W72/12 ,  H04L2101/622

Abstract: A selected network element is arranged for distributed transmission resource allocation conflict reduction. The selected network element receives a transmission from one of a first other network element and a second other network element and identifies at least one transmission resource indicated by the received transmission as being reserved by the first other network element and the second other network element. The selected network element stores an indication of each of the at least one identified transmission resource. In response to reading the stored indications, the selected network element selects a different transmission resource that is different from the transmission resource indicated by the stored indications. The selected network element transmits a transmission from the selected network element using the selected different transmission resource.

公开(公告)号：US20230141360A1

公开(公告)日：2023-05-11

申请号：US17522732

申请日：2021-11-09

Applicant: Texas Instruments Incorporated

Inventor： Borja Martinez Huerta ,  Guillem Boquet Pujadas ,  Xavier Vilajosana Guillen ,  Anand Ganesh Dabak ,  Kaichien Tsai ,  Jianwei Zhou ,  Danil Shalumov

IPC: G01S5/02 ,  H04W64/00 ,  G01S5/04

CPC classification number: G01S5/0244 ,  H04W64/00 ,  G01S5/04

Abstract: In an example method of target position estimation, the method includes calculating initial estimated positions of a target transmitter. Each of the initial estimated positions is based on an angle of arrival estimate received from a locator. The method includes generating an error projection associated with each of the initial estimated positions. The error projection is based on azimuth and elevation error characteristics of the locator associated with the initial estimated position. The method includes creating a select group of the locators based on overlaps of the error projections, wherein the select group of locators comprises a subset of the locators. The method includes calculating a refined estimate of the position of the target transmitter based on the initial estimated positions associated with the select group of locators.

公开(公告)号：US11206239B2

公开(公告)日：2021-12-21

申请号：US14797764

申请日：2015-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Alper S. Akyurek ,  Ariton E. Xhafa ,  Jianwei Zhou ,  Ramanuja Vedantham

IPC: H04L29/12

Abstract: A network includes at least two nodes that employ a routing protocol to communicate across a network. One of the nodes is a parent node and another of the nodes is a child node of the parent node. An address generator assigns a unique network address to the child node by appending an address value of a number of bits to a parent address of the parent node to create the unique network address for the child node.

公开(公告)号：US10659100B2

公开(公告)日：2020-05-19

申请号：US16137456

申请日：2018-09-20

Applicant: Texas Instruments Incorporated

Inventor： Jyotirmoy Banik ,  Il Han Kim ,  Jianwei Zhou ,  Xiaolin Lu

IPC: H04B1/00 ,  H04B1/7143

Abstract: A method of generating a channel hopping sequence for a link in a wireless sensor network is provided that includes receiving performance quality data for respective frequency channels of a plurality of frequency channels in the link in a monitoring system, determining a channel quality indicator (CQI) by the monitoring system for each frequency channel based on the respective performance quality data, and determining a repetition factor by the monitoring system for each frequency channel based on the respective CQI, wherein a repetition factor for a frequency channel indicates a number of times the frequency channel is repeated in the channel hopping sequence.

公开(公告)号：US09596558B2

公开(公告)日：2017-03-14

申请号：US14663270

申请日：2015-03-19

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Jianwei Zhou ,  Arvind Kandhalu Raghu ,  Ryan Nuzzaci

IPC: H04W4/00 ,  H04W74/02 ,  H04W84/18

CPC classification number: H04W4/70 ,  H04L12/44 ,  H04L41/0886 ,  H04W48/16 ,  H04W72/0446 ,  H04W74/02 ,  H04W84/18

Abstract: A method of transmitting association requests in a wireless sensor network includes transmitting an association request from a leaf node to an intermediate node. The method further includes transmitting the association request from the intermediate node during one of either a shared time slot or a dedicated time slot in response to at least one of the timing of dedicated time slots and data collision rates during shared time slots.

Abstract translation: 在无线传感器网络中发送关联请求的方法包括：从叶节点向中间节点发送关联请求。 响应于在共享时隙期间的专用时隙的定时和数据冲突率中的至少一个，该方法还包括在共享时隙或专用时隙之一期间从中间节点发送关联请求。

公开(公告)号：US20160204827A1

公开(公告)日：2016-07-14

申请号：US14993552

申请日：2016-01-12

Applicant: Texas Instruments Incorporated

Inventor： Chao-Fang Shih ,  Ariton E. Xhafa ,  Jianwei Zhou

IPC: H04B1/7143

CPC classification number: H04B1/7143

Abstract: Disclosed examples include methods and network devices for communicating in a wireless network, in which the device generates frequency hopping sequence y(j) having a prime number sequence length p, using cyclotomic classes in a field of p or using a baby-step giant-step algorithm, where y(0)=p−1 and the remaining sequence values y(j)=logα(j) mod (p−1). In certain examples, α=2 and the sequence is generated without solving logarithms using one or more algorithms to conserve memory and processing complexity for low power wireless sensors or other IEEE 802.15.4e based networks using Time-Slotted Channel Hopping (TSCH) communications.

Abstract translation: 公开的示例包括用于在无线网络中进行通信的方法和网络设备，其中设备使用p字段中的循环类生成具有素数序列长度p的跳频序列y（j） 其中y（0）= p-1，剩余的序列值y（j）=logα（j）mod（p-1）。 在某些示例中，α= 2，并且使用一个或多个算法来生成序列而不使用一个或多个算法来节省使用时隙信道跳跃（TSCH）通信的低功率无线传感器或其他基于IEEE 802.15.4e的网络的存储器和处理复杂度。

公开(公告)号：US20160037449A1

公开(公告)日：2016-02-04

申请号：US14751602

申请日：2015-06-26

Applicant: Texas Instruments Incorporated

Inventor： Arvind Kandhalu Raghu ,  Ariton E. Xhafa ,  Jianwei Zhou ,  Ramanuja Vedantham ,  Xiaolin Lu

IPC: H04W52/02 ,  H04L5/00 ,  H04W56/00 ,  H04W72/04

CPC classification number: H04W52/0209 ,  H04L5/0048 ,  H04W48/00 ,  H04W56/001 ,  H04W72/12 ,  H04W84/10 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144

Abstract: A device may be coupled to a time slot based communication system and receive a timing beacon packet that is broadcast in a time slot of the communication system at a periodic rate, in which the network uses a time slotted channel hopping protocol of sequential frames each having a plurality of time slots. The device may synchronize its time base to the timing beacon. The device may calculate a sleep time corresponding to a number of time slots until a next time slot that is scheduled for use by the device and then place the device in a sleep mode. The device may be awakened after the sleep time and operate during the next time slot. The device may repeat the process of calculating a sleep time, going into sleep mode, and waking for operation after the sleep time in order to reduce power consumption.

Abstract translation: 设备可以耦合到基于时隙的通信系统，并且以周期速率接收在通信系统的时隙中广播的定时信标分组，其中网络使用具有连续帧的时隙信道跳频协议，每个时隙信道分组具有 多个时隙。 设备可以将其时基同步到定时信标。 设备可以计算对应于多个时隙的休眠时间，直到调度供设备使用的下一个时隙，然后将设备置于睡眠模式。 睡眠时间后可能会唤醒设备，并在下一个时间段内进行操作。 该装置可以重复计算休眠时间，进入睡眠模式，以及在休眠时间之后唤醒操作以减少功耗的过程。