EP3900386A1 - Procédé de gestion d'un dispositif de communication de données et dispositif pour la mise en oeuvre du procédé - Google Patents
Procédé de gestion d'un dispositif de communication de données et dispositif pour la mise en oeuvre du procédéInfo
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- EP3900386A1 EP3900386A1 EP19839643.4A EP19839643A EP3900386A1 EP 3900386 A1 EP3900386 A1 EP 3900386A1 EP 19839643 A EP19839643 A EP 19839643A EP 3900386 A1 EP3900386 A1 EP 3900386A1
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Classifications
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- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
- H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
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- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
- H04Q2209/43—Arrangements in telecontrol or telemetry systems using a wireless architecture using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
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- H—ELECTRICITY
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- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/82—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data
- H04Q2209/823—Arrangements in the sub-station, i.e. sensing device where the sensing device takes the initiative of sending data where the data is sent when the measured values exceed a threshold, e.g. sending an alarm
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a method for managing a data communication device, as well as to a device for the implementation of this method. It applies in particular to portable data communication devices used in the context of the Internet of Things.
- the tracking of the geolocation of an object is typically carried out by means of a geolocation sensor associated with the object, configured to transmit geolocation data to a remote server.
- the use of sensors with minimum power and transmission means provided for communicating on wireless links with low energy consumption means that it is necessary to design diagrams allowing geolocation monitoring of connected objects while preserving the means used to obtain the geolocation data.
- An object of the present invention is to at least partially remedy the aforementioned drawbacks.
- a method for managing a data communication node in a group comprising at least the node, the method comprising, at the node: selecting an operating mode from a plurality of configured operating modes on the node and comprising a representative mode; and when the node is operating in representative mode, generating representative node data, and transmitting the representative node data to a group management unit, wherein the group includes a second node, and the representative node data is at least relative at the second node.
- the use of the respective resources (in particular in energy, bandwidth, addressing) associated with each communication node of a group for communicating with a group management unit can advantageously be reduced, which makes it possible to save, and further reduce wear and tear on group communication nodes.
- a limited number of nodes operating in group representative mode with functions involving communications with a group management unit such as, for example, data feedback functions generated by the nodes of the group or from data produced by the nodes of the group, inventory of the nodes of the group, functions which can be much more consuming of resources for the node or nodes implementing them than a communication between two nodes of the group, we limits the use of the resources available on each node while ensuring the desired functions for the group.
- the proposed method provides an advantageous response to the problem of redundancy encountered in the context of surveillance or monitoring of objects or living beings using tracking modules (also called “trackers” in English) associated with each object or living being to be monitored: when the objects or living beings are co-located, and therefore share similar geolocation information reported by geolocation sensors respectively embedded in the tracking modules, the transmission of these location information to a group management unit, which can be implemented by a remote platform, leads to a use of resources at the level of each tracking module sending data back to the management unit, and therefore increased use of resources at group level, to transmit almost identical geolocation information - and therefore redundant to a certain extent - to the group management unit e.
- tracking modules also called “trackers” in English
- the proposed method makes it possible to entrust this transmission of geolocation information relating to the group only to a limited number of tracking modules (typically only one) operating in a representative mode, which transmit information to the group management unit. (in G occurrence of geolocation) valid for the whole group.
- the proposed method thus makes it possible to avoid a waste of resources (in particular in energy, bandwidth and / or addressing, depending on the scenario) when each tracking module returns almost the same geolocation information, and this independently of the other modules. of the module group, while they are in close proximity.
- position information is only transmitted from a single tracking module, taking into account the other trackers in the immediate vicinity (for example by means of their identifiers ).
- This “representative” tracking module can be configured to detect the immediate proximity of the other tracking modules, and to keep a regular inventory, via a simple local communication, wireless and low consumption (for example using BLE technologies (for "Bluetooth Low”). Energy "), ZigBee, Z-Wave, etc.).
- BLE technologies for "Bluetooth Low”
- Energy ") for "
- ZigBee ZigBee
- Z-Wave etc.
- the scope of local detection and the frequency of inventory may vary depending on the embodiment, and may depend on the type of monitoring desired and the use cases envisaged.
- the proposed method advantageously makes it possible to implement a tracking module inventory solution in a group of tracking modules that consume little resources by entrusting the management for the group of the inventory function (including the transmission of any alarms generated by this function) to a limited number of group monitoring modules.
- a remote management platform can include the group management unit, and the transmission of node node data to the group management unit can include: transmit the node data representing to the management platform via a second wireless communication network.
- the proposed method may further comprise, when the node operates in representative mode, and when the group comprises a second node: receiving data from the second node via a first wireless communication network formed by the nodes of the group, and generating the representative node data based on the received data.
- the proposed method may further comprise: activating operation in representative mode on receipt of an operation request in representative mode.
- the proposed method may further comprise: activating operation in represented mode on receipt of a message identifying another node of the group operating in representative mode.
- the plurality of operating modes configured on the node can also comprise a represented mode
- the proposed method can also comprise, when the node operates in represented mode, generating represented node data: identify another node of the group operating in representative mode, and transmit to the identified node the represented node data for transmission to the group management unit.
- the proposed method may further comprise, when the node operates in representative mode: on detection of the occurrence of a change of representative event, identify another node of the group to succeed the node as a node operating in representative mode.
- the identification of the other node of the group to succeed the node as a node operating in representative mode can include: transmitting to at least one other node of the group a request to change the representative node .
- the proposed method can further comprise: identifying the other node according to a list of nodes in the group defining a sequence of nodes operating in representative mode.
- identifying the other node in the group can include: verifying that the other identified node can enter representative mode.
- the detection of the occurrence of the change of representative event may include: reception of a message from the group management unit.
- the representative change event may include one of a group comprising the expiration of a representative mode duration monitoring timer, a battery level relative to a predetermined battery level threshold, and a link quality level relative to a predetermined link quality threshold.
- a device comprising a processor and a radio frequency unit operatively coupled to the processor, the device being configured for the implementation of a method according to one of the embodiments. proposed in the present description.
- Another aspect relates to a computer program, loadable in a memory associated with a processor, and comprising portions of code for the implementation of a method as proposed in the present description during the execution of said program by the processor.
- Another aspect relates to a set of data representing, for example by compression or encoding, a computer program as proposed in the present description.
- Another aspect relates to a non-transient storage medium for a program executable by computer, comprising a data set representing one or more programs, said one or more programs comprising instructions for, during the execution of said one or several programs by a computer comprising a processor operatively coupled to a memory and to an input / output interface for data communication, causing the computer to manage a data communication node according to a method for managing a data node. data communication according to one of the embodiments proposed in the present description.
- FIG. the [Fig. the] is a diagram illustrating an example of a system for implementing one or more embodiments of the proposed method
- FIG. lb is a diagram illustrating an example of a system for implementing one or more embodiments of the proposed method
- FIG. 2 is a diagram illustrating an exemplary architecture of a data communication node for the implementation of one or more embodiments of the proposed method
- FIG. 3a is a diagram illustrating the method proposed according to one or more embodiments
- FIG. 3b is a diagram illustrating the method proposed according to one or more embodiments.
- FIG. 4a is a diagram illustrating an example of a system for implementing one or more embodiments of the proposed method
- FIG. 4b is a diagram illustrating an example of a system for the implementation of one or more embodiments of the proposed method
- FIG. 5a is a diagram illustrating data exchanges between communication nodes and a remote platform according to one or more embodiments
- FIG. 5b is a diagram illustrating data exchanges between communication nodes and a remote platform according to one or more embodiments
- the present description refers to functions, motors, units, modules, platforms, and illustrations of diagrams of the methods and devices according to one or more embodiments.
- Each of the functions, motors, modules, platforms, units and diagrams described can be implemented in hardware, software (including in the form of embedded software ("firmware”), or “middleware”), microcode, or any combination of these.
- the functions, motors, units, modules and / or illustrations of diagrams can be implemented by instructions of computer program or software code, which can be stored or transmitted on a computer-readable medium, including a non-transient medium, or a medium loaded in memory of a generic computer, specific, or any other device or programmable data processing device to produce a machine, so that the computer program instructions or the software code executed on the computer or the programmable data processing apparatus or device constitute means of implementing these functions.
- a computer-readable medium include, without limitation, computer storage media and communication media, including any medium facilitating the transfer of a computer program from a place towards another.
- computer storage medium is meant any physical medium that can be accessed by computer. Examples of computer storage media include, but are not limited to, flash memory disks or components or any other flash memory device (e.g.
- various forms of computer-readable medium can transmit or carry instructions to a computer, such as a router, a gateway, a server, or any data transmission equipment, whether it is wired transmission (by coaxial cable, optical fiber, telephone wires, DSL cable, or Ethernet cable), wireless (by infrared, radio, cellular, microwave), or virtualized transmission equipment (virtual router, virtual gateway, end of virtual tunnel, virtual firewall).
- a computer such as a router, a gateway, a server, or any data transmission equipment, whether it is wired transmission (by coaxial cable, optical fiber, telephone wires, DSL cable, or Ethernet cable), wireless (by infrared, radio, cellular, microwave), or virtualized transmission equipment (virtual router, virtual gateway, end of virtual tunnel, virtual firewall).
- the instructions may, depending on the embodiments, include code from any computer programming language or element of computer program, such as, without limitation, assembly languages, C, C ++, Visual Basic, HyperText Markup Language (HTML), Extensible Markup Language (XML), HyperText Transfer Protocol (HTTP), Hypertext Preprocessor (PHP), SQL, MySQL, Java, JavaScript, JavaScript Object Notation (JSON), Python, and bash scripting.
- assembly languages C, C ++, Visual Basic, HyperText Markup Language (HTML), Extensible Markup Language (XML), HyperText Transfer Protocol (HTTP), Hypertext Preprocessor (PHP), SQL, MySQL, Java, JavaScript, JavaScript Object Notation (JSON), Python, and bash scripting.
- server or “platform” is meant in the present description any point of service (virtualized or not) or device operating data processing, one or more databases, and / or communication functions of data.
- server or the term “platform” may refer to a physical processor operatively coupled with communication, database, and associated data storage functions, or refers to a network, group, set or complex of processors and associated data storage and networking equipment, as well as an operating system and one or more database systems, and application software in support of the services and functions provided by the server.
- a computing device can be configured to send and receive signals, via wireless and / or wired transmission network (s), or can be configured for processing and / or storage of data or signals, and can therefore operate as a server.
- equipment configured to operate as a server can include, by way of nonlimiting examples, dedicated servers mounted on a rack, desktops, laptops, service gateways (sometimes called “box” or “ residential gateway ”), multimedia decoders (sometimes called“ set-top boxes ”), integrated equipment combining various functionalities, such as two or more of the functionalities mentioned above.
- Servers can vary widely in configuration or capacity, but a server will usually include one or more central processing units (s) and memory.
- a server can also include one or more mass memory equipment (s), one or more power supply (s), one or more wireless and / or wired network interface (s), one or more several input / output interface (s), one or more operating system (s), such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, or an equivalent.
- network and “communication network” as used in the present description refer to one or more data links which can couple or connect equipment, possibly virtualized, so as to allow the transport of data.
- electronics between computer systems and / or modules and / or other electronic devices or equipment such as between a server and a client device or other types of devices, including between wireless devices paired or connected by a wireless network, for example.
- a network can also include mass memory to store data, such as a NAS (in English "network attached storage", SAN (in English "storage area network”), or any other form of support readable by a computer or by a machine, for example.
- a network can include, in whole or in part, the Internet, one or more local networks (in English "local area networks", or LANs), one or more networks of the WAN type (in English "wide area networks”), wire type connections, type connections without wire, cellular, or any combination of these different networks.
- subnets can use different architectures or be compliant or compatible with different protocols, and interoperate with larger networks.
- equipment can be used to make different architectures or protocols interoperable.
- a router can be used to provide a communication link or a data link between two LANs that would be different separate and independent.
- an operational coupling can include one or more wired connection (s) and / or one or more wireless connection (s) between two or more devices which allow simplex and / or duplex communication links between equipment or portions of equipment.
- an operational coupling or a connection can include a coupling by wire and / or wireless link to allow data communications between a server of the proposed system and other equipment of the system.
- app or “application program” (AP) and their variants (“app”, “webapp”, etc.) as used in the present description correspond to any tool which functions and is operated by means of a computer, to provide or execute one or more function (s) or task (s) for a user or another application program.
- a user interface can be provided on the equipment on which the application program is implemented.
- GUI graphical user interface
- an audio user interface can be rendered to the user using a loudspeaker. , headphones or audio output.
- Figure 1a is a diagram illustrating one or more embodiments in which a system (1) comprises a set (10) of devices (10-1, 10-2, 10-3, 10-4, 10 -5, 10-6, 10-7, 10-8 and 10-9) forming a group, each device (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8 and 10-9) of the group including a wireless communication module allowing the exchange of data with one or more other devices in the group so as to form a network of data communication nodes.
- a system (1) comprises a set (10) of devices (10-1, 10-2, 10-3, 10-4, 10 -5, 10-6, 10-7, 10-8 and 10-9) forming a group, each device (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8 and 10-9) of the group including a wireless communication module allowing the exchange of data with one or more other devices in the group so as to form a network of data communication nodes.
- the set (10) of data communication nodes thus forms a set of connected networked objects.
- the communication network may use different network technologies (radio network or optical network), and implement a topology and communication protocols adapted to the chosen technology.
- the proposed method is not limited to a particular network topology (mesh network, star network, point-to-point network, point-to-multipoint network, etc.) or a particular network technology. , and that any topology and any network technology allowing the communication of each node of the network with at least one other node of the network could be used for the implementation of embodiments.
- the network formed by the data communication nodes could be of the low power radiocommunication network type, and use communication links of the "Bluetooth”, “Bluetooth Low” type.
- the network formed by the data communication nodes could be of the optical communications network type, and use communication links of the "LiFi” type (from the "Light Fidelity").
- the network formed by the communication nodes is of M2M type (from the English "Machine-to-machine"), in which each node can be configured to communicate with the assembly from other nodes on the network.
- FIG lb is a diagram illustrating one or more embodiments in which the system (1) illustrated in Figure la further comprises a management platform 11.
- each communication node (10- 1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8 and 10-9) of the group can also be configured to communicate with the management platform 11 by through one or more network (s) (12) comprising a communication network, to which a service gateway, commonly called a “box”, is connected.
- Each communication node (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8 and 10-9) will preferably be configured so that the connection of communication with the gateway service either wireless type, for example using WiFi data communication technology ®, or technology Zigbee ®, or a Bluetooth ® wireless communication technology (and in particular Bluetooth Low Energy ® or BLE technology), or Z-Wave ® and an IEEE 802.15.4 communication protocol.
- wireless type for example using WiFi data communication technology ®, or technology Zigbee ®, or a Bluetooth ® wireless communication technology (and in particular Bluetooth Low Energy ® or BLE technology), or Z-Wave ® and an IEEE 802.15.4 communication protocol.
- the management platform 11 can be interconnected and exchange data on one or more communication link (s), using one or more several networks of different types, such as a fixed network, a cellular network (for example according to the 2G standard (GSM, GPRS, EDGE), 3G (UMTS), 4G (LTE), LTE-A, LTE-M, CDMA , CDMA2000, HSPA, 5G, or their variants or evolutions), another type of radio network (eg WiFi ® or Bluetooth ® ), an IP network, a combination of several of these networks, etc.
- GSM Global System for Mobile communications
- a resource space (processing, memory, etc.) can thus be assigned in one or more embodiments to the group (10) of the communication nodes in the management platform 11.
- the management platform 11 is connected to the network 12, so that data can be transmitted between the platform 11 and a communication node (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7, 10-8 and 10-9).
- the management platform 11 can be hosted by one or more servers, for example within a cloud.
- This or these servers which can be any type of equipment or system comprising data processing means, such as a computer, a set of interconnected computers (in the context of a virtualized network for example), and understand and / or be connected to one or more databases to store data, can be configured to exchange data with one or more communication nodes (10-1, 10-2, 10-3, 10-4, 10 -5, 10-6, 10-7, 10-8 and 10-9), and in particular receive from one or more communication nodes (10-1, 10-2, 10-3, 10-4, 10 -5, 10-6, 10-7, 10-8 and 10-9) representing node data.
- the management platform 11 can be provided with an application programming interface (in English, "Application Programming Interface”, or “API”), or any other type of interface (not shown in Figure lb), configured to transmit to and receive data from one or more communication nodes (10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10 -7, 10-8 and 10-9), and in particular receive data from the representative node.
- API Application Programming Interface
- each communication node (10) for example each of the communication nodes (10-1, 10-2, 10-3, 10-4, 10-
- Figures la and lb) may include a wireless communication unit (20), a controller (21), a power unit (22 ), and a management unit (23). Some of the communication nodes may further include a functional unit (24). According to the embodiment, the wireless communication unit (20), the power supply unit (22), the management unit (23) and, if appropriate, the functional unit (24) can to be coupled so operational to the controller (21) by a communication bus (25), or by any communication link, possibly comprising one or more hardware connectors.
- G architecture of the communication node (10) illustrated in FIG. 2 all of the wireless communication units (20), controller (21), power unit (22), management unit (23), functional unit (24) and communication bus (25) forms a communication node according to one or more embodiments, which may also include other components, units, functions, not shown in the figure.
- the controller (21) may include one or more processors, such as a microprocessor, a microcontroller or another hardware processor, an associated memory (for example, a random access memory (RAM), a cache memory, a flash memory, etc. ), and be able to be configured to control the wireless communication unit (20), the power supply unit (22), the management unit (23) and, if necessary, the functional unit (24), in order to control the use of the communication node (10) according to one or more embodiments of the proposed method, for example by executing a computer program comprising portions of code for the implementation of a communication node management method as proposed in the present description.
- processors such as a microprocessor, a microcontroller or another hardware processor, an associated memory (for example, a random access memory (RAM), a cache memory, a flash memory, etc. ), and be able to be configured to control the wireless communication unit (20), the power supply unit (22), the management unit (23) and, if necessary, the functional unit (24), in order to control the use of the communication
- an associated memory of the controller (21), external or internal to the controller (21), contains instructions which, when executed by the controller (21), cause this controller (21) to be executed. or check the wireless communication unit (20), power unit (22), management unit (23) and / or, where appropriate, functional unit (24) parts of the examples of implementation of the proposed method described in the present description.
- the controller (21) can be a component implementing a processor or a computing unit for managing a communication node according to the proposed method and controlling the management unit (23) of the device (10), as for example a microcontroller.
- the management unit (23) can be implemented, depending on the embodiment chosen, in the form of one or more software, or a combination of one or more hardware and one or several software, configured for the implementation of embodiments of the management method described in the present description.
- the communication node (10) can be configured via the management unit (23) to operate according to a plurality of operating modes, among which are an operating mode called "representative mode” and a mode known as “represented mode”, and to operate in representative mode and / or in represented mode according to one or more embodiments described in the present description.
- the software part of the management unit (23) can constitute or form part of a software for controlling the data communication node.
- control software in English, “driver” will denote a set of one or more software configured for the implementation of a communication node management process proposed in this description.
- the control software is configured to be executable on a processor of the communication node, and / or on a processor of a computer equipment to which a part of the communication node is connected.
- the wireless communication unit (20) can be implemented, according to the chosen embodiment, in the form of a combination of one or more hardware and one or more software, and include one or more radio frequency and / or optical communication materials, and communication unit control software, for example executable by the controller (21) or, in another architecture of the communication node, executable by a processor of the wireless communication unit (20), and loaded into a memory accessible by a processor configured to execute the communication unit control software.
- the wireless communication unit (20) may include a data communication interface.
- the wireless communication unit (20) can be configured to use communication links of the “Bluetooth”, “Bluetooth Low Energy” (BLE), “Bluetooth smart” type. ”, WiFi or any communication link based on IEEE802.11x,“ Zigbee ”protocols and / or any communication link based on IEEE802.15.4,“ Z-Wave ”,“ 6LowPAN ”protocols (IPv6 Low-power wireless Personal Area Network), “Thread”, “Sigfox”, “Neul”, “LoRa”, and / or based on the specifications developed by the 3GPP group for “LTE-M” networks, any type of communication link in the near field ( NFC, “Near Field Communication”), and / or any “LiFi” type communication link (“Light Fidelity”).
- BLE Bluetooth Low Energy
- the power unit (22) can be implemented, depending on the embodiment chosen, in the form of a combination of one or more hardware and one or more software, and include one or more several electrical supply materials, such as one or more batteries, and supply control software, for example executable by the controller (21) or, in another architecture of the communication node, executable by a processor of the power supply unit (22), and loaded into a memory accessible by a processor configured to execute the communication unit control software.
- the power control software can be configured to generate state data of the battery or batteries of the communication node (10), and in particular generate an alert when the charge level of the or the batteries of the communication node (10) exceeds a predetermined threshold. Once generated, the alert can be transmitted in particular to the management unit (23), for example by means of the generation of a dedicated interrupt.
- the communication node device (10) can be implemented in software form, in which case it takes the form of a program executable by a processor, or in hardware form (or "hardware"), such as an integrated circuit.
- application specific ASIC
- SOC system on a chip
- FPGA Field Programmable Gate Array
- SOC System On Chip
- ASIC Application-specific Integrated Circuit
- ASIC Application-specific Integrated Circuit
- Programmable logic circuits of the FPGA (Field-Programmable Gate Array) type are electronic circuits reconfigurable by the user.
- the communication node device (10) can also use hybrid architectures, such as for example architectures based on a CPU + FPGA, a GPU (Graphics Processing Unit) or an MPPA (Multi-Purpose Processor Array).
- hybrid architectures such as for example architectures based on a CPU + FPGA, a GPU (Graphics Processing Unit) or an MPPA (Multi-Purpose Processor Array).
- a plurality of network nodes can embed a functional unit (24), configured to generate state information relating to the node in which it is embedded.
- a functional unit 24
- one or more nodes of the network may be coupled to a functional unit (24) so as to receive state information generated by the functional unit (24).
- this functional unit (24) may include one or more sensors, each capable of generating state information for the node, such as, for example, a temperature sensor, a air quality, a geographic location sensor, a position sensor and / or a humidity sensor, etc. These sensors can be used according to the proposed method depending on the use case, and in particular depending on the functional context in which the embodiment of the proposed method is implemented.
- the proposed method is not limited to a particular architecture of the communication node (10), the wireless communication unit (20), the controller (21), the power supply unit (22), the management unit (23), the functional unit (24) and the communication bus (25) or the coupling between these elements illustrating by way of example a mode Figure 2.
- a data communication node belonging to a data communication group selects (50) an operating mode from a plurality of operating modes configured on the node and comprising a representative mode.
- At least one of the group's communication nodes can be configured to operate according to a plurality of operating modes including a representative mode, but not necessarily of the mode shown.
- the group's communication nodes can thus have different configurations, hardware and / or software, corresponding to different types of device. Some of these devices can advantageously be provided with sufficient resources so as not to have to operate, including intermittently, in the mode shown. Other devices can be configured to operate intermittently, in representative mode then in represented mode, and vice versa.
- the selection of operating mode can be synchronized on all the nodes of the group so that a single node of the group selects the representative mode.
- the communication node can be configured to, when the representative mode is selected (50a), generate (51a) representative node data, and transmit (52a) the representative node data to a group management unit.
- Operating in representative mode advantageously makes it possible to transmit data from a representative node which includes data relating to another node of the group, which will typically operate in represented mode.
- operating in representative mode advantageously makes it possible to centralize the reporting of data relating to other nodes of the group to that of the nodes of the group which operates in representative mode, and thus not to request resources (in particular energy resources, bandwidth and addressing) for this data transmission only at the node operating in representative mode.
- the group management unit may be one of the group's communication nodes, a device configured to communicate with at least one communication nodes of the group through one or more network (s).
- the group management unit may in one or more embodiments be hosted in a remote management platform (11), in which case the communication node operating in representative mode may be configured to transmit the representative node data, which will typically include data relating to another node in the group, to the remote management platform (11) which will be configured to process data received from the node operating in representative mode.
- the group management unit may be hosted in a device accessible by a local data network (typically a LAN, from the English “Local Area Network”) for transmission of representative node data.
- a local data network typically a LAN, from the English “Local Area Network”
- each communication node can be configured to transmit data relating to another communication node (for example one or more alarms relating to the geolocation of the object followed by this other node, and / or relating to an object status monitoring and / or its communication node (power status, abnormally high humidity, temperature outside of a set interval, etc.)) to a group management unit accessible locally and configured to process data received from a node operating in representative mode.
- another communication node for example one or more alarms relating to the geolocation of the object followed by this other node, and / or relating to an object status monitoring and / or its communication node (power status, abnormally high humidity, temperature outside of a set interval, etc.)
- one or more group communication nodes can be configured to include a group management unit to which the representative node data will be sent. In order to take full advantage of the pooling of resources within the group of communication nodes, it can be configured to include only a single communication node hosting a group management unit.
- a data communication node belonging to a data communication group selects (50) an operating mode from a plurality of operating modes configured on the node and comprising a representative mode and a represented mode .
- the communication node can thus be configured with a plurality of operating modes including a representative mode and a represented mode.
- Each data communication node can thus advantageously, in one or more embodiments, be configured to operate according to a first operating mode in which it operates, in addition to its other functions, as a representative of the group of communication nodes of data to which it belongs, and according to a second operating mode in which it operates, in addition to its other functions, as represented with respect to another node of the group of data communication nodes to which it belongs.
- Each communication node of the group can be advantageously configured to switch from representative mode to the represented mode, and vice versa, so as not to operate continuously in the same operating mode, without a change of operating mode being able to intervene for this node.
- each communication node of a group can be configured in one or more embodiments to be functionally identical to the other communication nodes of the group with regard to operation in the representative and represented modes.
- the communication node can be configured to, when the representative mode is selected (50a), generate (51a) representative node data, and transmit (52a) the representative node data to a group management unit.
- the communication node can also be configured to, when the represented mode is selected (50b), generate (51b) represented node data.
- the node data shown can for example be generated on the basis of data generated by a functional unit coupled to the communication node within a device.
- This functional unit can include one or more sensors, providing data representing measurements (for example geolocation, temperature, pressure, humidity and / or air quality) to the communication node, which can then process this data received, the processing comprising for example a fitness, a combination of this data, the addition of a CRC code, etc., to generate the data of the node represented.
- the node operating in the represented mode can identify (52b) one or more nodes of the group of communication nodes during operation in representative mode. Depending on the embodiment, this identification can be carried out by means of a look-up table stored in the local memory of the communication node, listing all of the nodes of the communication group. communication nodes (for example by an identifier which can be a network identifier, or a network address) and, for each listed node belonging to the group, a status in progress indicating whether the node in question is operating in representative mode or in represented mode.
- the communication node operating in represented mode can transmit (52c) the represented node data generated to the communication node operating in identified representative mode.
- a communication node operating in the represented mode does not need to identify the node communication operating in representative mode. Since transmission in multicast or broadcast mode does not require individual recipient addressing, it is sufficient for a communication node operating in represented mode to know that it is not itself the communication node operating in mode representative.
- the representative node can be configured to receive data from another node of the group via the group's wireless communication network, and generate representative node data on the database received.
- the group's wireless communication network will preferably be chosen for the possibility of transmitting short messages (typically of a few kilobytes of data) between the group's communication nodes which do little to request the sending node, in particular for the use of resources such as energy and bandwidth, so that the nodes of the group are preserved as soon as they do not operate in representative mode.
- short messages typically of a few kilobytes of data
- resources such as energy and bandwidth
- the proposed communication nodes can be advantageously configured so that operation in representative mode is distributed between the communication nodes of a group over time.
- detection of the occurrence of an operating mode change event, among one or more operating mode change events configured on the node can trigger a change of operating mode for this node to exit the operation in representative mode, and the designation of one or more other nodes of the group to operate in representative mode in place of the node leaving operation in representative mode.
- an operating mode change event configured on the communication node can be associated with a timer (in English, "timer") configured on the node with a value corresponding to a limit of duration during which the communication node can operate in representative mode, before leaving this mode at the expiration of this duration.
- this duration limit may be preconfigured to a fixed value T for the node, or configured dynamically, for example in function of a weight factor w representing a measurement of the battery level, at a value Tw determined at the start of the timer when the node enters representative mode.
- another event for changing the operating mode configured on the communication node can be associated with a battery level relative to a predetermined battery level threshold.
- the communication node can be configured to repeatedly monitor its battery level, compare it to the predetermined threshold, and exit representative mode when its battery level reaches the predetermined threshold.
- another event for changing the operating mode configured on the communication node can be associated with a link quality level relative to a predetermined link quality threshold.
- the communication node can be configured to repeatedly monitor the quality level of the communication links used during operation in representative mode (and in particular the quality level of the wireless link between the communication node and the 'group management unit), compare it with the predetermined threshold, and exit representative mode when its link quality level reaches the predetermined threshold.
- This embodiment advantageously makes it possible to avoid keeping a communication node in operation in representative mode when it may no longer be able to fulfill its functions as group representative due to a drop in quality. of a communication link used during its operation in representative mode.
- the detection of the occurrence of an operating mode change event may include the reception of a message, for example from a management unit of the group of communication nodes , or another node in the communication node group.
- the change of operating mode of a node operating in representative mode and / or the designation of one or more successors of this node can be managed centrally, for example by the unit of group management which can, in one or more embodiments, include a remote management platform, as illustrated in FIG. 1b.
- the group management unit can thus be configured to control for the group the operation in representative mode of one or more nodes of the group, and transmit a message to a node of the group operating in representative mode requesting that this node leave the mode representative.
- the piloting for the group the operation in representative mode can also include the designation of another node of the group and the transmission to this other node of a message requesting that this node enters in representative mode.
- control for the group of the operation in representative mode may include sending to all the nodes of the group or to a plurality of nodes of the group (for example by using a broadcast mode or a point-to-multipoint mode of transmission of messages (in English, "broadcast” and “multicast", respectively) of a message for change of operating mode comprising identification data of a node of the group.
- each communication node can process the identification data of a node in the group, and modify its operating mode as a function of this data.
- the message received can be interpreted as a request for operation in representative mode intended for this knot.
- the message received can be interpreted as a request for operation in representative mode intended for another node, and be used, the if necessary, to update an operating status table relating to the operating mode, in particular for the other node identified by the identification data.
- the control for the group of the operation in representative mode is configured to have only one communication node of the group at a given time which operates in representative mode
- the message received can also be interpreted as a request to change operating mode to exit the representative mode intended for the node operating in representative mode, and to be used, if necessary, to update an operating status table relating to the operating mode, for updating the status of the node operating in representative mode and called to exit this mode.
- the message received can be interpreted as a request to change operating mode to leave the representative mode intended for this node.
- the message received can be interpreted as a request for operation in representative mode intended for another node, and be used, the if necessary, to update an operating status table relating to the operating mode, in particular for the other node identified by the identification data called to operate in representative mode.
- the control for the group of operation in representative mode is configured to have only one communication node of the group at a given time which operates in representative mode
- the message received can also be interpreted as a request to change operating mode to exit representative mode intended for the node operating in representative mode, and be used, if necessary, to update an operating status table relating to operating mode , for updating the status of the node operating in representative mode and called to exit this mode.
- control for the group of the operation in representative mode may include sending to all the nodes of the group or to a plurality of nodes of the group (for example by using a broadcast mode or a point-to-multipoint transmission mode of messages (in English, "broadcast” and “multicast", respectively) of a change of operating mode message comprising identification data of a first and a second node of the group
- the nodes of the group can then be configured to interpret this message as containing a request for operation in representative mode intended for the first node, and a request for change of operating mode to leave the representative mode intended for the second node, and to act accordingly.
- upon receipt of this message as described above (whether or not to switch to representative mode, whether or not to exit representative mode, if necessary updating its operating status table es).
- one or more group communication nodes may be configured to receive an operation request message in representative mode (for example transmitted in point-to-point mode) and, on receipt of this message, exit their operating mode in progress to enter operation in representative mode by activating operation in mode representative.
- one or more group communication nodes can be configured to receive a message requesting a change in operating mode to exit the representative mode (for example transmitted in point-to-point mode ) and, on receipt of this message, leave their current representative mode to enter an operation other than the representative mode.
- these nodes may also be configured to leave their current representative mode and enter the represented mode.
- one or more communication nodes of the group can be configured, on receipt of an operation request message in representative mode which identifies them (whether by means of data from identification in the case of a message broadcast to all the nodes of the group or transmitted to several nodes of the group, or by means of addressing information in the case of a message transmitted in point-to-point mode point), carry out one or more checks relating to their ability to operate in representative, and depending on the results of these checks, respond with a positive acknowledgment when the results of these checks indicate that they have the capacity to operate in representative mode, or conversely respond with a negative acknowledgment when the results of these checks checks indicate that they do not have the ability to operate in representative mode.
- a check may include a measurement of the battery level of the communication node, and a comparison of the measured level with a threshold. If the measured level exceeds the threshold, indicating that the battery is discharged, the node can be configured to transmit a negative acknowledgment to respond to the request received.
- This diagram advantageously makes it possible to ensure that a node designated to operate in representative mode is able to do so, for example before executing changes in operating mode and updating, if necessary, status tables. operating procedures kept up to date by one or more nodes of the group.
- control of the operation in representative mode may be configured so that a request for operation in representative mode message includes, is accompanied, or, depending on the embodiment, is interpreted as comprising a query to ensure that the destination node has the ability to operate in representative mode.
- This embodiment advantageously makes it possible to avoid communication nodes from sending in response an acknowledgment message, in order to limit the use of their battery, when the node designation protocol operating in representative mode provides that a non -response of the node receiving the request can be interpreted as a positive acknowledgment of this request.
- this other node of the group can be configured to verify that the group node to which it transmits the request message can enter representative mode.
- the detection of the occurrence of an operating mode change event can be implemented in software form by an interrupt manager (software and / or hardware) (in English, "Interrupt handler") configured to execute a program corresponding to each interrupt when it occurs.
- the interrupt manager can for example be configured to be executed for one or more of the events described above: expiration of a timer, battery level reaching a threshold, link quality level reaching a threshold, and reception of a message, in particular from a group management unit and / or from another communication node.
- the designation of at least one other node of the group to operate in representative mode in place of the node leaving the operation in representative mode may include the identification of this other node of the group to succeed the node as a node operating in representative mode .
- control for the group of operation in representative mode is or is not centralized (for example when it is carried out by a communication node of the group, such as for example a node operating in mode representative, or by a central entity, such as for example a group management unit (when this unit does not correspond to a group communication node), implemented for example by a remote management platform), this control can be configured so that the designation of at least one other node of the group to operate in representative mode in place of the node is performed on the basis of a list of nodes of the group defining a sequence of nodes operating in representative mode. In one embodiment, such a list can define a sequence according to which each node must operate in representative mode after the node immediately preceding in the sequence.
- this sequence can be defined on the basis of the network addresses of each listed node.
- the list of group nodes can be stored in memory of a node operating in representative mode and then transmitted to its successor when exiting representative mode, can be stored in memory of a management unit of the group configured to carry out control for the group of operation in representative mode, and / or be stored in the memory of one or more nodes of the group, or even of all the nodes of the group, to ensure redundant storage, regardless of their operating mode In progress.
- the list of nodes of the group defining a sequence of nodes operating in representative mode can be configured to be dynamically reconstructed from data relating to the nodes of the group, such as identifiers and / or addresses of these nodes.
- the identification of a successor node of another node operating in representative mode can be carried out from the data relating to the nodes of the group, which advantageously makes it possible to avoid storing in memory a list defining the sequence, in particular in the embodiments where at least some of the communication nodes are devices with very low memory storage capacities.
- the list of nodes of the group defining a sequence of nodes operating in representative mode can be dynamically reconfigured to take account of evolutionary constraints in time associated with the listed nodes, such as for example their respective battery levels. According to this example, a node having a lower battery level than the next node in the sequence could be moved in the sequence so as not to be asked to assume the role of node representing only after the node having a higher battery level. .
- the designation of a successor node by a node in operation in representative mode may include the transmission of a token (in English, "token") from the node in progress. operating in representative mode towards the node designated to be its successor.
- a token in English, "token”
- the transmission of a token from one node to another, to transmit the role of node operating in representative mode can be controlled by a central entity, such as a group management unit (which can be, depending on the embodiment, implemented within a communication node or a remote management platform).
- control for the group of operation in representative mode may be configured to circulate this token between the various communication nodes of the group.
- the circulation of the token will be configured so that the token circulates between the different nodes, remaining associated with a node for a limited time, in order to distribute the energy consumption associated with the management of the token between the nodes of the group.
- control for the group of operation in representative mode may be configured so that there is at least one node of the group operating in representative mode at all times.
- the steering can also be configured so that there is at all times a single node of the group operating in representative mode.
- Figures 4a and 4b illustrate a group of communication nodes operating according to one or more embodiments of the proposed method described below.
- control for the group of operation in representative mode can be configured in one or more embodiments to structure an address plan for the nodes of the group by aggregating the respective identifiers (100-1 b - 100-9b) nodes of the group corresponding to an address (103) defined for the group, for example of IP format.
- 9 tracking devices (100-1 - 100-9) are grouped together in a batch to which a unique IP address is assigned.
- These 9 devices can include one or more sensors, reporting data to communication nodes configured according to one or more embodiments.
- the devices In the case of use where the devices are used to monitor foodstuffs, it may for example be temperature sensors, configured to raise an alert to the associated communication node in the event of a break in the cold chain, and sensors geolocation (100-1 a - 100-9a), configured to go back to the associated communication node of the geolocation data of the device.
- the proposed method goes back, for example to a remote server (101) as illustrated in the figure, through one or more networks communication (102) including at least one network using wireless communication links (102a) used by the devices (100-1 - 100-9) to communicate with the remote server (101), alarms relating to the chain cold and / or data relating to the geolocation of the batch of devices, by means of a single node of the group operating in representative mode (for example the node included in the device 100-6), is particularly advantageous, in particular by which saves the battery of each device, and minimizes the wear of each device by limiting its use to local communications, that is to say to the representative node, except during periods of time where it works in representative mode.
- one or more group data communication nodes can be configured to, when operating in representative mode, generate representative node data which includes inventory data from the nodes of the group.
- this inventory data can be generated on the basis of geolocation data received or expected by the node operating in representative mode from the other nodes of the group.
- the node operating in representative mode can be configured to determine an estimate of distance between its position and that of each node of the group providing it with its geolocation information, and generate data for inventory based on this determination.
- the node operating in representative mode can be configured to generate inventory data indicating that this other node is not not or no longer geolocated with the rest of the node group.
- the node operating in representative mode can be configured to detect that it has not received geolocation data from one of the other nodes of the group, that is to say that it no longer receives this data in the case where, for example, the group is configured dynamically, that is to say that it has never been received in the case where, for example, the group has been preconfigured. It can also be configured to, on detection that it has not received geolocation data from one of the other nodes of the group, generate inventory data on the basis of this determination.
- These embodiments of the proposed method advantageously make it possible to facilitate the peer-to-peer inventory (in English "peer-to-peer") in real time using at least the resources (battery, transmission, speed, etc.
- FIG. 4a are particularly suitable for the case of use, for example, of a pallet of cases (each equipped with a tracking module, or "tracker” comprising a device operating according to a embodiments proposed in the present description), which can advantageously be identified in a unitary view of the platform for simplified management.
- This palette can contain one or more homogeneous lots (type of objects, expiration date, etc.) directly identifiable, while keeping a single box operating in representative mode, transmitting information to the remote platform for the entire lot.
- control for the group of operation in representative mode can be managed, in whole or in part, by a remote platform (101), such as that illustrated in FIG. 1b.
- this remote platform (101) can be configured to manage each communication node individually or in a group, thanks to the structured addressing plan described above with reference to FIG. 4a, in order to automatically aggregate a synthetic overview of the group of communication nodes, for example stored in a database (101a) coupled to the platform (101).
- the platform can also be configured to configure and possibly reconfigure, if necessary, the communication nodes when the communication with the communication node operating in representative mode (100-6) is bidirectional (102b), which is the case for example for communications using a cellular network (2G-5G) or a wireless network with low energy consumption, for example a network of LPWAN type (from the English “Low- power Wide-area-network ”) like LoRa TM.
- a cellular network 2G-5G
- a wireless network with low energy consumption for example a network of LPWAN type (from the English “Low- power Wide-area-network ”) like LoRa TM.
- Figures 5a and 5b are diagrams illustrating the exchange of messages between a plurality of communication nodes and a remote platform operating according to one or more embodiments of the proposed method described below.
- the formation of a group of communication nodes is initialized during a phase of mutual listening between the communication nodes (100-1, 100-2, 100- 3), during which these nodes exchange discovery messages, for example as defined by the technical specification of the WiFiDirect standard.
- the group's communication nodes designate (M) a group node to operate in representative mode (node 100-2 in the figure), for example using a predefined list or a token as described above for one or more embodiments (exchange of messages E (100-1; 100-2) and E (100-2; 100-3) in the figure).
- the nodes of the group then transmit one or more presence messages (P 1 (100-1; 100-2) and PI (100-3; 100-2)) to the node during operation in representative mode ( 100-2), which on receipt of these one or more presence messages, transmits representative node data comprising geolocation data (message G1 (100-2; P)) to the remote platform (101).
- P 1 100-1; 100-2
- PI 100-3; 100-2
- representative node data comprising geolocation data (message G1 (100-2; P)) to the remote platform (101).
- the node in operation in representative mode (100-2) can be configured to transmit repeatedly, regularly or not, to the remote platform (101) representative node data comprising updated geolocation data at each transmission (Gl messages (100-2; P), G2 (100-2; P) and G3 (100-2; P)). As illustrated in FIG.
- this representative node data comprising geolocation data can be updated then transmitted to the remote platform (101), repeatedly, and / or, depending on the embodiment, upon reception of '' a predetermined number of presence messages from at least one node in the group (P2 (100-l; 100-2) and P3 (100-l; 100-2) for G2 (100-2; P) and P4 ( 100-l; 100-2) and P5 (100-l; 100-2) for G3 (100-2; P)), and / or on expiration of a timer triggered with a predetermined or dynamically determined value at each transmission representative node data.
- FIG. 5a further illustrates a case in which one of the nodes (100-3) initially included in the group of nodes withdraws from the group, and stops transmitting presence messages to the node in operating mode in representative mode (100-2).
- the updating of the geolocation data included in the representative node data transmitted to the remote platform (101) can, in one or more embodiments, take into account the removal of the node (100-3) in order to inform the remote platform, which can thus have geolocation information for the group and inventory information for the group associated with geolocation information for the group.
- FIG. 5b illustrates the reverse case, in which a new communication node (100-4) joins the existing group (100-1 and 100-2).
- representative node data comprising geolocation data can be updated then transmitted to the remote platform (101), repeatedly, and / or, depending on the mode of realization, upon receipt of a number predetermined messages of presence of at least one node of the group (P6 (100-1; 100-2) and P7 (100-1; 100-2) for G4 (100-2; P)), and / or on expiration of a timer triggered with a predetermined value or determined dynamically on each transmission of data from the representative node.
- the node (100-4) wishing to enter the group sends a discovery message (D (100-4)) which is taken into account by the node during operation in representative mode (100-2).
- the group communication nodes designate (M) a group node to operate in representative mode (node 100-4 in the figure ), other than the previously designated node (100-2), for example using a predefined list or a token as described above for one or more embodiments (message exchanges E (100-l; 100-2) and E (100-2; 100-4) in the figure).
- This update of the node of the group designated to operate in representative mode advantageously makes it possible to avoid using the resources of only one node to implement the functions of node representing the group.
- the proposed method can provide a transfer scheme (in English, "handover") of the node function operating in representative mode to ensure a transfer without loss of data from a first node ( 100-2) to a second node (100-4).
- a transfer scheme in English, "handover" of the node function operating in representative mode to ensure a transfer without loss of data from a first node ( 100-2) to a second node (100-4).
- the node (100-2) previously operating in representative mode transmits, before leaving the representative mode, to the node during operation in representative mode (100-4) , data received (as a node in representative mode) from other nodes (messages P8 (l 00-1; 100-2) and P9 (l 00-1; 100-2)) and / or data from representative node generated but not yet transmitted to the remote platform (101), so that the latter generates its own representative node data and transmits them to the remote platform (101) (message Gl (100-4; P)).
- the nodes of the group then transmit one or more presence messages (P 1 (100-1, 100-4) and P2 (100-1, 100-4), and P 1 (100-2; 100-4 ) and P2 (100-2; 100-4)) to the node in operation in representative mode (100-4), which on receipt of these one or more presence messages, transmits data from the representative node comprising data geolocation (message G2 (100-4; P)) to the remote platform (101).
- the proposed method advantageously makes it possible to minimize energy consumption and to save network bandwidth for any type of application for tracking objects, animals or people as well as their containers or vehicles, particularly when they are traveling or are simply grouped together, depending on the embodiment used.
- the proposed control method and the device for implementing an embodiment of the method include different variants, modifications and improvements which will appear so obvious to those skilled in the art, it being understood that these different variants, modifications and improvements form part of the scope of the invention, as defined by the claims which follow.
- different aspects and features described above can be implemented together, or separately, or substituted for each other, and all of the different combinations and sub-combinations of the aspects and features are part of the scope of the invention.
- some systems and equipment described above may not incorporate all of the modules and functions described for the preferred embodiments.
Abstract
Description
Claims
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Application Number | Priority Date | Filing Date | Title |
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FR1873363A FR3091101A1 (fr) | 2018-12-19 | 2018-12-19 | Procédé de gestion d’un dispositif de communication de données et dispositif pour la mise en œuvre du procédé |
PCT/FR2019/052966 WO2020128217A1 (fr) | 2018-12-19 | 2019-12-09 | Procédé de gestion d'un dispositif de communication de données et dispositif pour la mise en œuvre du procédé |
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EP3900386A1 true EP3900386A1 (fr) | 2021-10-27 |
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EP19839643.4A Pending EP3900386A1 (fr) | 2018-12-19 | 2019-12-09 | Procédé de gestion d'un dispositif de communication de données et dispositif pour la mise en oeuvre du procédé |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220078885A1 (fr) |
EP (1) | EP3900386A1 (fr) |
FR (1) | FR3091101A1 (fr) |
WO (1) | WO2020128217A1 (fr) |
Families Citing this family (1)
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KR102324374B1 (ko) * | 2019-11-18 | 2021-11-11 | 한국전자통신연구원 | 무선 통신 시스템에서의 클러스터 구성 방법 및 장치 |
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CN104284402B (zh) * | 2013-07-09 | 2018-11-13 | 南宁富桂精密工业有限公司 | 无线传感器网络的电量调度方法及控制装置 |
US10313977B2 (en) * | 2016-12-23 | 2019-06-04 | Intel Corporation | Adaptive network topology |
US10408929B2 (en) * | 2018-01-12 | 2019-09-10 | Intel Corporation | Non-synchronized RF ranging |
-
2018
- 2018-12-19 FR FR1873363A patent/FR3091101A1/fr active Pending
-
2019
- 2019-12-09 WO PCT/FR2019/052966 patent/WO2020128217A1/fr unknown
- 2019-12-09 US US17/415,631 patent/US20220078885A1/en active Pending
- 2019-12-09 EP EP19839643.4A patent/EP3900386A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
US20220078885A1 (en) | 2022-03-10 |
WO2020128217A1 (fr) | 2020-06-25 |
FR3091101A1 (fr) | 2020-06-26 |
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