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公开(公告)号：US12055651B2
公开(公告)日：2024-08-06
申请号：US17613030
申请日：2020-05-25
申请人： SIGFOX
CPC分类号： G01S5/0289 , G01S5/0009 , G01S19/42
摘要： A method for geolocating a terminal of a wireless communication system from measurements of a parameter representative of a radio signal exchanged between the terminal and base stations of the communication system. The method uses fixed base stations and a mobile base station which is displaced in a determined search area. During a predefined search period, the terminal emits several radio signals to the fixed base stations and the mobile base station. A precise geographical position can then be determined, on the one hand, from the measurements carried out during the search period for the different base stations, and on the other hand, from the geographical positions of the fixed base stations and from the geographical positions of the mobile base station at the different times of emission of the radio signals by the terminal.
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公开(公告)号：US11835638B2
公开(公告)日：2023-12-05
申请号：US17253114
申请日：2019-06-17
申请人： SIGFOX
发明人： Loïc Hubert
CPC分类号： G01S5/0054 , G01S5/0036 , G01S5/018 , G01S5/0205 , H04W64/00
摘要： A method for geolocating a terminal of a wireless communication system. The terminal includes a positioning device for obtaining a precise geographical position of the terminal. An access network of the communication system estimates an approximate geographical position of the terminal. In order to limit the size of the messages exchanged between the terminal and the access network, only a truncated part of the information about the precise geographical position of the terminal is transmitted by the terminal to the access network. The access network determines the precise geographical position of the terminal by combining the truncated information received from the terminal with the approximate geographical position estimated by the access network.
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公开(公告)号：US11705961B2
公开(公告)日：2023-07-18
申请号：US17426871
申请日：2020-01-28
申请人： SIGFOX
发明人： Nicolas Chalbos , Loïc Hubert , Arnaud Mansuy
CPC分类号： H04B7/15542
摘要： A method for achieving wireless communication between a transmitter and a receiver via a repeater device. The value of a first physical property of a message received from the transmitter is measured by the repeater device. The value of a second physical property to be used for the retransmission of the message is determined by the repeater device depending on the value of the first physical property measured for the received message. The message is retransmitted to the receiver by the repeater device using the determined value of the second physical property.
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公开(公告)号：US11442133B2
公开(公告)日：2022-09-13
申请号：US16982541
申请日：2019-03-20
申请人： SIGFOX
发明人： Olivier Isson , Renaud Marty , Sofiane Dhouib
摘要： A method for estimating the geographical position of a terminal of interest, among a panel of terminals of a wireless communication system. For each terminal of the panel, a time signature including values measured for each terminal during a predetermined observation period is determined. Values of similarity between the time signatures of the terminals of the panel is calculated, a similarity value calculated for two terminals representing the probability of the terminals being moved together or having been located at the same place during the observation period. Various terminals of the panel are partitioned into different groups depending on the similarity values. The geographical position of the terminal of interest is estimated as a function of the available geolocation data for at least one other terminal of the group to which the terminal of interest belongs.
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公开(公告)号：US20220221551A1
公开(公告)日：2022-07-14
申请号：US17613030
申请日：2020-05-25
申请人： SIGFOX
摘要： A method for geolocating a terminal of a wireless communication system from measurements of a parameter representative of a radio signal exchanged between the terminal and base stations of the communication system. The method uses fixed base stations and a mobile base station which is displaced in a determined search area. During a predefined search period, the terminal emits several radio signals to the fixed base stations and the mobile base station. A precise geographical position can then be determined, on the one hand, from the measurements carried out during the search period for the different base stations, and on the other hand, from the geographical positions of the fixed base stations and from the geographical positions of the mobile base station at the different times of emission of the radio signals by the terminal.
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公开(公告)号：US11196162B2
公开(公告)日：2021-12-07
申请号：US16635831
申请日：2018-08-17
申请人： SIGFOX
发明人： Cyril Jouanlanne
摘要： An antenna including a ground plane, a metal plate arranged facing the ground plane, and a supply wire for connecting the plate to a generator or a receiver, such that the antenna has a first resonance frequency in a patch antenna mode. The antenna further includes a ground wire connecting the plate to the ground plane, and a capacitive element arranged in series with the ground wire between the supply wire and the ground plane, such that the antenna also has a second resonance frequency in a wire-plate antenna mode.
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公开(公告)号：US20210263127A1
公开(公告)日：2021-08-26
申请号：US17253114
申请日：2019-06-17
申请人： SIGFOX
发明人： LOÏC HUBERT
摘要： A method for geolocating a terminal of a wireless communication system. The terminal includes a positioning device for obtaining a precise geographical position of the terminal. An access network of the communication system estimates an approximate geographical position of the terminal. In order to limit the size of the messages exchanged between the terminal and the access network, only a truncated part of the information about the precise geographical position of the terminal is transmitted by the terminal to the access network. The access network determines the precise geographical position of the terminal by combining the truncated information received from the terminal with the approximate geographical position estimated by the access network.
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公开(公告)号：US11070975B2
公开(公告)日：2021-07-20
申请号：US16347589
申请日：2017-11-09
申请人： SIGFOX
发明人： Guillaume Larignon
IPC分类号： H04L29/06 , H04W12/033 , H04L9/08 , H04L9/32
摘要： A method for transmitting, by a transmitter, a packet to a receiver of a communication system. The packet including data encrypted according to a symmetric key encryption protocol by determining the value of a generation information and determining an encryption key according to the value of the generation information. The data to be included in the encrypted packet to be transmitted is encrypted according to the encryption key. A truncated information is calculated based on the generation information. A verification code for the encrypted packet is calculated according to the encrypted data and the first portion of the generation information. The encrypted packet to be transmitted is formed according to the truncated information, the verification code and the encrypted data.
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公开(公告)号：US10924992B2
公开(公告)日：2021-02-16
申请号：US16462211
申请日：2017-11-23
申请人： SIGFOX
发明人： Benoit Ponsard , Juan Carlos Zuniga
摘要： A method for selecting, by a sending device of a first wireless communication system, a communication mode to be used for the first wireless communication system. The communication mode being selected from among at least two different communication modes associated with different geographical zones. The method includes listening to a second wireless communication system, the second wireless communication system being different from the first wireless communication system. The second wireless communication system having at least two different communication modes associated with different geographical zones. The communication mode used by the second wireless communication system is determined. The communication mode to be used by the first wireless communication system is selected according to the communication mode used by the second wireless communication system.
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10.发明授权公开(公告)号：US10667296B2
公开(公告)日：2020-05-26
申请号：US16066290
申请日：2016-12-27
申请人： SIGFOX
发明人： Christophe Jeloyan , Lionel Bertaux
摘要： A method of transmitting, by a terminal of a wireless communication system, a message on a communication channel shared with other terminals. Before sending the message, the terminal listens on the communication channel until the terminal detects an absence of activity on the communication channel for an inactivity time ΔTin. When no activity is detected on the communication channel for the inactivity time ΔTin, the terminal waits for a waiting time ΔTat and then transmits the message on the communication channel. The waiting time ΔTat is identical for all of the terminals of the wireless communication system.
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