公开(公告)号：US10470146B2

公开(公告)日：2019-11-05

申请号：US16070431

申请日：2017-01-17

Applicant: SAGEMCOM BROADBAND SAS

Inventor： Massinissa Lalam ,  Thierry Lestable

IPC: H04J3/06 ,  H04L7/10 ,  H04W56/00 ,  H04W72/12 ,  H04W88/16

Abstract: A method for synchronising a first gateway of a LoRa network, intended to enable the first gateway to function according to the class B communication mode of the LoRaWAN protocol. The method relies on at least one reception of a synchronisation frame by the first gateway, each synchronisation frame having been transmitted by a second class B gateway in the LoRa network, equipped with synchronisation means and designated by a server. The first gateway uses an instant of reception of each synchronisation frame that it receives in order to synchronise beacon transmissions used in the implementation of the class B communication mode with beacon transmissions made by other class B gateways in the LoRa network.

公开(公告)号：US11451630B2

公开(公告)日：2022-09-20

申请号：US16064556

申请日：2016-12-15

Applicant: SAGEMCOM BROADBAND SAS

Inventor： Massinissa Lalam ,  Thierry Lestable

IPC: H04L67/12 ,  H04W4/38 ,  G01S19/48 ,  G01S5/00 ,  G01S5/02 ,  H04J3/06

Abstract: For determining a temporal reference and/or at least one spatial reference, in a communication system comprising a plurality of gathering gateways configured to transmit beacons, a device performs for each beacon: obtaining (502) therefrom information on current geolocation of the gathering gateway that transmitted said beacon; obtaining (503) therefrom information representing a communication technology used for determining said current geolocation; and obtaining (504) therefrom information indicating whether said current geolocation was determined by internal means or by external means. The device then uses (509) the information thus obtained for determining the temporal reference for synchronizing in time and frequency said device and/or the spatial reference or references for determining the geolocation of said device.