WO2023174758A1 - Clé électronique owc sécurisée - Google Patents

Clé électronique owc sécurisée Download PDF

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Publication number
WO2023174758A1
WO2023174758A1 PCT/EP2023/055764 EP2023055764W WO2023174758A1 WO 2023174758 A1 WO2023174758 A1 WO 2023174758A1 EP 2023055764 W EP2023055764 W EP 2023055764W WO 2023174758 A1 WO2023174758 A1 WO 2023174758A1
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WO
WIPO (PCT)
Prior art keywords
owc
dongle
interface
wireless communication
mode
Prior art date
Application number
PCT/EP2023/055764
Other languages
English (en)
Inventor
Christian Jordan
Andreas Felix Alfred BLUSCHKE
Heinz Alex WILLEBRAND
Original Assignee
Signify Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signify Holding B.V. filed Critical Signify Holding B.V.
Publication of WO2023174758A1 publication Critical patent/WO2023174758A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/50—Secure pairing of devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1143—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Definitions

  • the present disclosure relates to a secure OWC dongle and a method of operating a secure OWC dongle.
  • Optical wireless communication refers to techniques whereby information is communicated in the form of a signal embedded in light (including for example visible light or invisible light, such as for example infrared light) emitted by a light source by modulating at least one property of the light.
  • visible light may be light that has a wavelength in the range 380nm to 740nm
  • infrared (IR) light may be light that has a wavelength in the range 740nm to 1.5mm. It is appreciated that there may be some overlap between these ranges.
  • such techniques may also be referred to as coded light, Light Fidelity (LiFi), visible light communication (VLC) or free-space optical communication (FSO).
  • FIG 1 shows schematically an example arrangement of an OWC system 10 showing various components which may be present. Other OWC systems may differ.
  • the OWC system 10 of Figure 1 comprises a home infrastructure network 11 including a plurality of interconnected End User Connectivity Devices (EUCDs), which each provide a respective home connectivity network 12a-d.
  • the home infrastructure network 11 may also include one or more Inter-of-Things Gateways (loT-GWs) providing other networks 13 such as a Personal Area Network (PAN) or Sensor Area Network (SAN).
  • the home infrastructure network 11 also includes at least one Residential Gateway (RGW) connecting the home infrastructure network 11 to an access extension network 14.
  • the access extension network 14 may in turn be connected to an access network 15 via a Network Terminal (NT).
  • NT Network Terminal
  • the access network 15 ultimately connects to cloud services 16 via a Central Office (CO).
  • CO Central Office
  • the home infrastructure network 11 may be referred to as the “backhaul network”.
  • the home connectivity networks 12 may be referred to as the “fronthaul network”.
  • other OWC network setups can differ significantly from the example given in Figure 1, and comprise more or fewer components of different types.
  • the EUCDs may alternatively be referred to or regarded as “access points” (or “APs”) of the OWC network 10.
  • the EUCDs may for example be integrated into luminaires, e.g. at a ceiling or a wall of a room, at a floor lamp, etc.
  • Each EUCD comprises an optical front end for outputting OWC signals.
  • the EUCDs output a respective OWC signal for reception by End User Devices (EUDs).
  • EUDs End User Devices
  • EUDs 200 include laptops, smartphones, tablet computers, etc.
  • EUD 200 is in connected to EUCD 500 via home connectivity network 12a.
  • the FoVs of each EUCD generally depend on the environment in which the EUCD is installed, and may overlap with each other.
  • an OWC interface is required. It may not be possible or desirable to integrate the OWC interface into the EUD 200 itself, for example due to space constraints. In such cases, an external device, commonly referred to as an OWC dongle, may be provided.
  • An OWC dongle comprises an OWC interface and also a connector for connecting to the EUD. This connector is typically a USB or RJ45 connection, which can provide both data communication and power transfer.
  • an Optical Wireless Communication, OWC, dongle comprising: a wireless communication interface for wirelessly communicating with an end user device when the OWC dongle is in a normal operating mode, and for wirelessly communicating with a tag device when the OWC dongle is in a pairing mode; an OWC interface for communicating with an OWC device when the OWC dongle is in said normal operating mode; and a controller configured to: when the OWC dongle is in said pairing mode, operate the wireless communication interface to receive signals from said tag device; and in response to receiving an authentication signal from said tag device via the wireless communication interface, switch the OWC dongle to said normal operating mode by activating the OWC interface.
  • the OWC interface may be disabled in the pairing mode.
  • the wireless interface may be a non-OWC wireless interface, using a frequency of electromagnetic radiation different from that of the OWC interface (e.g. one or more non-visible frequencies of light).
  • the OWC dongle comprises a wireless power transfer interface, and when the OWC dongle is in said pairing mode the controller is configured to operate the wireless power transfer interface to provide power wirelessly to said tag device.
  • the tag device may comprise an internal battery.
  • the OWC dongle may comprise an internal battery.
  • the OWC dongle comprises a wireless power transfer interface, and when the OWC dongle is in said normal operating mode the controller is configured to operate the wireless power transfer interface to receive power wirelessly.
  • the OWC dongle may receive power wirelessly from the EUR and/or another device.
  • the OWC dongle is configured to enter said pairing mode in response to detecting presence of the tag device. Presence of the tag device may be detected e.g. using the wireless power transfer interface. Alternatively or additionally, presence of the tag device may be detected using one or more other presence sensors.
  • the OWC dongle is configured to enter said paring mode in response to no signal being received at the wireless communication interface for a predetermined amount of time.
  • Said predetermined amount of time may be, by way of example only, 30 seconds, one minute, two minutes, five minutes, ten minutes, etc.
  • the OWC dongle is configured to enter said paring mode in response to user input received at the OWC dongle.
  • the user may push a button located on the OWC dongle to cause the OWC dongle to enter said pairing mode.
  • Such user input may alternatively or additionally be received via a user interface of the OWC dongle such as a touchscreen.
  • the controller when the OWC dongle is in said normal operating mode the controller is configured to operate the wireless communication interface in high-speed mode.
  • the wireless communication interface may be operated in a non-high-speed mode while in the OWC dongle is in pairing mode. This may save power.
  • the OWC dongle may comprise an internal memory storing an authorized code and the authentication signal may comprise an authentication code.
  • the controller may be configured to switch the OWC dongle to said normal operating mode in response to the received authentication code matching the stored authorized code.
  • a method of operating an Optical Wireless Communication, OWC, dongle comprising: a wireless communication interface for wirelessly communicating with an end user device when the OWC dongle is in a normal operating mode, and for wirelessly communicating with a tag device when the OWC dongle is in a pairing mode; and an OWC interface for communicating with an OWC device when the OWC dongle is in said normal operating mode; the method comprising: when the OWC dongle is in said pairing mode, operating the wireless communication interface to receive signals from said tag device; and in response to receiving an authentication signal from said tag device via the wireless communication interface, switching the OWC dongle to said normal operating mode by activating the OWC interface.
  • the OWC dongle comprises a wireless power transfer interface and the method comprises, when the OWC dongle is in said pairing mode, operating a wireless power transfer interface of the OWC dongle to provide power wirelessly to said tag device.
  • the OWC dongle comprises a wireless power transfer interface and the method comprises, when the OWC dongle is in said normal operating mode, operating the wireless power transfer interface to receive power wirelessly.
  • the method comprises entering said paring mode in response to no signal being received at the wireless communication interface for a predetermined amount of time; or in response to user input received at the OWC dongle.
  • the method comprises, when the OWC dongle is in said normal operating mode, operating the wireless communication interface to high-speed mode.
  • said authentication signal comprises an authentication code
  • the method comprises switching the OWC dongle to said normal operating mode in response to the received authentication code matching an authorized code stored in an internal memory of the OWC dongle.
  • a computer program comprising code configured so as when executed by one or more processing units to perform the method according to the second aspect or any example thereof.
  • Fig. 1 shows schematically an example of an OWC network
  • Fig. 2 shows schematically an example of an OWC dongle operating according to an example of a normal operating mode
  • Fig. 3 shows schematically an example of an OWC dongle operating according to an example of a pairing mode
  • Fig. 4 shows schematically an example method of switching from the normal operating mode to the pairing mode.
  • the present disclosure provides a “wireless OWC dongle”. Connection between the OWC dongle and an EUD is provided by a wireless connection (rather than e.g. a USB or RJ45 connection, as in known OWC dongles).
  • a wireless connection (rather than e.g. a USB or RJ45 connection, as in known OWC dongles).
  • An advantage of this is that the EUD does not require an external connector or port for connecting to the OWC dongle.
  • restrictions on the positioning of the OWC dongle relative to the EUD are lessened by the use of a wireless connection, meaning that it can be easier to position the OWC dongle for optimal OWC communication with the EUCD (given that OWC communication requires a Line of Sight, LOS).
  • the OWC dongle can operate in one or two modes: a “normal operating mode”; and a “pairing mode”.
  • normal operating mode In normal operating mode, the OWC dongle connects to the EUD to provide OWC network connectivity to the EUD.
  • pairing mode the OWD dongle connects to a tag device (also called a “key”).
  • the tag device can provide authentication for the OWC dongle to switch to the normal operating mode. That is, the OWC dongle may not otherwise operate in the normal operating mode.
  • Normal operating mode will be described first with reference to Figure 2, followed by pairing mode with reference to Figure 3.
  • Figure 4, described later, relates to example methods of switching between the operating modes.
  • the OWC dongle 100 is shown operating in accordance with the normal operating mode in conjunction with an EUD 200.
  • An EUCD 500 is also shown in Figure 2.
  • the OWC dongle 100 comprises a controller 110, a wireless communication interface 120, an OWC interface 140, and optionally a wireless power transfer interface 130.
  • the controller 110 is operatively coupled to the wireless communication interface 120, and the OWC interface 140 and, when present, the wireless power transfer interface 130.
  • the controller 110 may be provided by one or more processors. It is appreciated that the OWC dongle 100 may comprise additional components not shown in the Figures.
  • the OWC interface 140 of the OWC dongle 100 is constructed and arranged to receive and transmit OWC signals. In this way, the OWC interface 140 allows the OWC dongle 100 to communicate wirelessly with the EUCD 500 via OWC signals. In other examples, the OWC interface 140 may be only for receiving OWC signals from the EUCD 500 (i.e. the “downlink”). Communication to the OWC network 10 (i.e. the “uplink”) may be provided instead via a wired connection (e.g. Ethernet) or a different wireless connection (e.g. Wi-Fi, Bluetooth, etc.). It is appreciated that in these examples the OWC dongle 100 also comprises the appropriate hardware for providing the wired or wireless connection.
  • a wired connection e.g. Ethernet
  • a different wireless connection e.g. Wi-Fi, Bluetooth, etc.
  • the EUD 200 comprises a processor 210, a wireless communication interface 220, and optionally a wireless power transfer interface 230.
  • the processor 210 is operatively coupled to the wireless communication interface 220 and, when present, the wireless power transfer interface 230.
  • the EUD 200 may comprise additional components not shown in the Figures.
  • the EUD 200 may comprise a user interface (e.g. a touchscreen), a wired communication interface (e.g. Ethernet), a wireless communication interface (e.g. Wi-Fi, Bluetooth), etc.
  • Wireless communication between the wireless communication interface 120 of the OWC dongle 100 and the wireless communication interface 220 of the EUD 200 may be provided by any suitable arrangement.
  • the wireless communication will use transmission frequencies outside the visible light and infrared ranges, and typically having a frequency much less than visible light and infrared frequencies.
  • the wireless communication may use a frequency of around 57.1 GHz to 63.9 GHz (e.g. with a Centre Channel Frequency of 60.952 GHz).
  • wireless communication between the wireless communication interface 120 of the OWC dongle 100 and the wireless communication interface 220 of the EUD 200 may be provided by Near-Field Communication (NFC) technology.
  • NFC can implement standard protocols e.g. SB, Ethernet, SATA, PCle, DisplayPort, etc.
  • the NFC connection may be a high-speed NFC connection or a “normal” low-speed NFC connection.
  • ST60A2G0 An example of a known product which can be used to implement the NFC connection is ST60A2G0.
  • ST60A2G0 is an RF millimetre-wave transceiver product operating in the 60 GHz V-Band. It provides a very power efficient and high data rate wireless link enabling freedom from physical cables and connectors for short range (a few centimetres) point-to-point communication, using a variety of external antennas. Such antennas can be patch antennas designed on PCB or highly directive SMT horn antennas allowing both end-fire and broadside radiation patterns.
  • the ST60A2G0 can achieve wireless transfer speeds up to 6.25Gbit/s.
  • ST60A2G0 can implement both high-speed and low-speed NFC.
  • KSS104M Another example of a known product which can be used to implement the NFC connection is Keyssa KSS104M.
  • KSS104M chips provide contactless connectors which can transmit and receive data at speeds of up to 6Gbps.
  • KSS104M is designed to run standard protocols, including USB Super Speed, DisplayPort, Ethernet, as well as other high-speed and lower-speed serial protocols.
  • KSS104M can implement both high-speed and low-speed NFC.
  • Wireless Power Transfer between the wireless power transfer interface 130 of the OWC dongle 100 and the wireless power transfer interface 230 of the EUD 200 may be provided e.g. using the Qi or some other standard such as Power Matter Alliance (PMA) wireless charging.
  • PMA Power Matter Alliance
  • the OWC dongle 100 and/or EUD 200 may comprise their own respective internal battery and therefore the wireless power transfer interfaces may not be required.
  • the OWC dongle 100 connects wirelessly to both the EUD 200 and the EUCD 500, thereby providing the EUD 200 with access to the OWC network 10.
  • the controller 110 activates the OWC interface 140 to provide the OWC connection as described above.
  • the controller 110 may control the OWC interface 140 to operate in a high-speed mode in the normal operation mode.
  • the controller 110 may also control the wireless power transfer interface 130 to operate in a receive mode for receiving power wirelessly (e.g. from the EUD 200 or another device such as a desk lamp stand). This is indicated by an arrow in Figure 2 showing flow of power from the EUD 200 to the OWC dongle 100.
  • FIG 3 shows schematically the OWC dongle 100 operating in accordance with the pairing mode.
  • the tag device 300 is also shown in in Figure 3.
  • the tag device 300 comprises a controller 310, a wireless communication interface 320 and, optionally, a wireless power transfer interface 330.
  • the controller 310 may be provided by one or more processors.
  • the controller 310 is operatively coupled to the wireless communication interface 320 and, when present, the wireless power transfer interface 330.
  • the wireless communication interface 320 and wireless power transfer interface 330 may be provided using any technology described above in relation to the corresponding elements of the OWC dongle 100.
  • a non-high speed wireless communication link between the OWC dongle 100 and the tag device 300 may be sufficient.
  • low-speed wireless communication may be used between the OWC dongle 100 and the tag device 300
  • high-speed wireless communication may be used between the OWC dongle 100 and the EUD 200.
  • the same wireless communication interface 120 of the OWC dongle 100 may provide both the low-speed and high-speed wireless connections (although it is not excluded that the OWC dongle 100 comprises separate wireless communication interfaces for providing the low-speed and highspeed connections, respectively).
  • the tag device 300 may be powered by its own internal battery. Alternatively or additionally, the tag device 300 may receive power wirelessly via a wireless power transfer interface 330 from the OWC dongle 100 as shown in Figure 3, from the EUD 200, or indeed from another device (e.g. a desk lamp).
  • a wireless power transfer interface 330 from the OWC dongle 100 as shown in Figure 3, from the EUD 200, or indeed from another device (e.g. a desk lamp).
  • the controller 110 controls the wireless communication interface 120 to operate in receive mode for receiving signals from the tag device 300.
  • the wireless communication interface 120 may be operated in a low- speed mode while the OWC dongle 100 is in pairing mode (and only switching to the highspeed mode when the OWC dongle 100 enters normal operating mode, as mentioned above).
  • the controller 110 may disable or otherwise restrict the OWC interface 140 in the pairing mode.
  • the controller 110 may also control the wireless power transfer interface 140 to operate in a transmit mode for transmitting power wirelessly to the tag device 300 using the wireless power transfer interface 130 of the OWC dongle 100 and the wireless power transfer interface 330 of the tag device 300.
  • a transmit mode for transmitting power wirelessly to the tag device 300 using the wireless power transfer interface 130 of the OWC dongle 100 and the wireless power transfer interface 330 of the tag device 300.
  • the wireless power transfer function of the OWC dongle 100 is switched from a wireless power transfer receive (WPT RX) mode to a wireless power transfer transmit (WPT TX) mode.
  • WPT RX wireless power transfer receive
  • WPT TX wireless power transfer transmit
  • the wireless power transfer interface 140 may also be used to detect presence of the tag device 300. This is also a feature which is supported by known wireless power transfer solutions, e.g. the Qi standard.
  • the wireless communication interface 120 and, when present, wireless power transfer interface 130 of the OWC dongle 100 are “double-used” for different purposes, depending on the mode of operation. Examples of how and when the OWC dongle 100 may switch between the operating modes will now be described.
  • Figure 4 shows schematically a method performed by the OWC dongle 100 according to examples described herein.
  • the OWC dongle 100 is operated in the pairing mode.
  • the controller 110 operates the wireless communication interface 120 of the OWC dongle 100 to receive signals from the tag device 300.
  • the OWC interface 140 may be disabled or otherwise restricted in the pairing mode.
  • the OWC dongle 100 may enter pairing mode based on a variety of triggers.
  • the controller 110 may cause the OWC dongle 100 to enter pairing mode in response to detecting presence of the tag device 300. This may be done e.g. via the wireless power transfer interface 130 or by another presence sensor.
  • the controller 110 may cause the OWC dongle 100 to enter pairing mode in response to determining that no signal has been received at the wireless communication interface 120 for a predetermined amount of time (e.g. 30 seconds, a minute, five minutes, ten minutes, etc.).
  • the controller 110 may cause the OWC dongle 100 to enter pairing mode in response to user input being received (e.g. via a button or a user interface of the OWC dongle 100).
  • the OWC dongle 100 receives an authentication signal from the tag device 300 via the wireless communication interface 120. This causes the OWC dongle 100 to switch from the pairing mode to the normal operating mode.
  • the authentication signal received from the tag device 300 may comprise an authentication code (e.g. a password or signature).
  • the controller 110 may be configured to compare the received authentication code to an authorized code stored in an internal memory of the OWC dongle 100 and only switch to the normal operating mode if the received authentication code matches the authorized code.
  • the OWC dongle 100 switches to the normal operating mode.
  • the controller 110 activates the OWC interface 140 (e.g. by operating the OWC interface in a full, unrestricted mode).
  • An example use case of the OWC dongle 100 is as follows:
  • OWC dongle with wireless power transfer (and integrated battery) is charged somehow and is thus ready for use (can act with tag device and EUD);
  • the OWC dongle switches to pairing mode.
  • the wireless communication interface is activated (this does not have to be in high-speed mode)
  • the OWC dongle switches to normal operating mode.
  • WPT TX is switched off and, among other things, the wireless communication interface is activated in high-speed mode;
  • the OWC dongle is now able to establish a connection via the high-speed wireless communication interface with the EUD and to implement data communication between EUCD and EUD.
  • processor or processing system or circuitry referred to herein may in practice be provided by a single chip or integrated circuit or plural chips or integrated circuits, optionally provided as a chipset, an application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), digital signal processor (DSP), graphics processing units (GPUs), etc.
  • the chip or chips may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry, which are configurable so as to operate in accordance with the exemplary embodiments.
  • the exemplary embodiments may be implemented at least in part by computer software stored in (non-transitory) memory and executable by the processor, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • Suitable devices include for example a hard disk and non-volatile semiconductor memory (including for example a solid-state drive or SSD).
  • the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice.
  • the program may be in the form of non-transitory source code, object code, a code intermediate source and object code such as in partially compiled form, or in any other non-transitory form suitable for use in the implementation of processes according to the invention.
  • the carrier may be any entity or device capable of carrying the program.
  • the carrier may comprise a storage medium, such as a solid-state drive (SSD) or other semiconductor-based RAM; a ROM, for example a CD ROM or a semiconductor ROM; a magnetic recording medium, for example a floppy disk or hard disk; optical memory devices in general; etc.
  • SSD solid-state drive
  • ROM read-only memory
  • magnetic recording medium for example a floppy disk or hard disk
  • optical memory devices in general etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Une clé électronique (100) de communication sans fil optique (OWC) comprend une interface de communication sans fil (120), une interface OWC (140) et un dispositif de commande (110). L'interface de communication sans fil (120) communique sans fil avec un dispositif d'utilisateur final (200) lorsque la clé électronique OWC (100) est dans un mode de fonctionnement normal, et avec un dispositif d'étiquette (300) lorsque la clé électronique OWC (100) est dans un mode d'appariement. L'interface OWC (140) communique avec un dispositif OWC (500) lorsque la clé électronique OWC (100) est dans le mode de fonctionnement normal. Le dispositif de commande (110) est configuré pour : dans ledit mode d'appariement, faire fonctionner l'interface de communication sans fil (120) pour recevoir des signaux provenant dudit dispositif d'étiquette (300) ; et en réponse à la réception d'un signal d'authentification provenant dudit dispositif d'étiquette (300) par l'intermédiaire de l'interface de communication sans fil (120), commuter la clé électronique OWC (100) vers ledit mode de fonctionnement normal par activation de l'interface OWC (140).
PCT/EP2023/055764 2022-03-14 2023-03-07 Clé électronique owc sécurisée WO2023174758A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202263319453P 2022-03-14 2022-03-14
US63/319,453 2022-03-14
EP22163981 2022-03-24
EP22163981.8 2022-03-24

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WO2023174758A1 true WO2023174758A1 (fr) 2023-09-21

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170289145A1 (en) * 2016-03-29 2017-10-05 Bragi GmbH Wireless Dongle for Communications with Wireless Earpieces
GB2563281A (en) * 2017-06-09 2018-12-12 Solanki Deepak An optical wireless communication system and adaptive optical wireless communication network
US20200375457A1 (en) * 2019-05-29 2020-12-03 Dexcom, Inc. System and method for wireless communication of analyte data

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170289145A1 (en) * 2016-03-29 2017-10-05 Bragi GmbH Wireless Dongle for Communications with Wireless Earpieces
GB2563281A (en) * 2017-06-09 2018-12-12 Solanki Deepak An optical wireless communication system and adaptive optical wireless communication network
US20200375457A1 (en) * 2019-05-29 2020-12-03 Dexcom, Inc. System and method for wireless communication of analyte data

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