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    Questions and Answers

    Questions and Answers on Leveraging LiFi to monetize co-working lobbies webinar

    What is the future of hybrid lifi and wifi network?

    Each of the existing wireless communication technologies have found a specific place and use within the wider ecosystem (like Bluetooth, 3 & 4G, Lora, ZigBee, etc), and there are many specific use cases where LiFi presents the greatest advantage too.

     

    We have therefore developed a system that plugs in easily alongside Wi-Fi networks, like this:

    Hybrid network
    It would be hard for a rogue hacker to create a LiFi hotspot?
    The coverage area of Li-Fi is very local and easily defined. Light cannot travel through walls so an attacker would need to have access to the ceiling or lighting to install her rogue LiFi transceiver hotspot.
    Do you consider (or already use) Blockchain to secure some data transferred via Lifi?

    LiFi operates at layer 1 (physical) and layer 2 (data link) of the OSI network model. The Trulifi system applies AES encryption with a 128-bit key at this level (not blockchain-based).

     

    LiFi is independent of the protocols used at the higher layers in the network (3 and up). Blockchain is a data structure model, typically transmitted at application layer (layer 7). As such, this model is independent of how it’s physically transmitted (LiFi, WiFi, LAN).

    LiFi can be retransmited with mirrors or fiber optic as we do with light?

    Yes, this is possible. Data transmitted using optic fiber can be coupled into a LiFi transceiver and re-transmitted, without the need for conversion to the electrical domain and back. We already employ this in our solution for airplanes to save weight and to increase immunity to Electromagnetic Interference.

     

    Mirrors could be used as well, but only when the solution is specifically designed for the LiFi application. An ordinary wall mirror wouldn’t result in a working LiFI connection.

    Is Trulifi and LiFi available in Mexico?
    Yes. We don’t yet have installations in Mexico, but we are active and available worldwide.
    And how does LIFI work if you are doing activities across two rooms in the same house ?
    You would need a Li-Fi transceiver in both rooms, and as you move between the two coverage areas the USB access key reconnects in under a second (700ms).
    Can lifi go above 250Mbps ?
    Yes, in the lab it can transmit up to 100 Gbps, and possibly higher. Right now our certified commercial products can transmit up to 250Mbps.
    Would Passive Infrared Occupancy Sensors potentially interfere with LiFi signals?
    PIR sensors wouldn’t have any influence on the LiFi signal. Their infrared light intensity is too low.
    Is it only hotels that can use lifi?
    In the webinar we explored the specific case of coworking lobbies, but there are many compelling use cases in the wider Hospitality segment and many other sectors including Industry 4.0, Transport, Office and Government.
    Could you share the presentation? What is the coverage for each device? Is there a calculator for the coverage?
    In the example of an office installation with a ceiling height of 1.8m the coverage area is 2.4m. The coverage expands in direct relation to the ceiling height, so it’s very simple to accurately determine and set coverage, but we have developed a tool that will be launched shortly to support installation where necessary.
    Does each guest need to have a dongle? Maybe for common areas in the hotel like the lobby, restaurant etc
    Yes guests/users need to connect our USB access key to their device to connect to Trulifi.
    Dongles are a workaround, functional but not ideal. What OEM agreements are you working on to incorporate LiFi into the devices themselves?
    We are working directly with several OEMs and also the key communication standards groups to speed the incorporation of LiFi into mainstream devices. The incorporation of Wi-Fi took around 9 years, and on the heels of this precedent we expect the process for LiFi to go much more quickly.
    Is this technology available all around the world? I am from Brazil. A little bit rusty my english, but I am doing my best.
    Yes, we are active worldwide.
    What about hotel conference centers...future?
    Conference and exhibition centers present a clear use case for LiFi, with all the radio frequency challenges these venues experience. We are already engaged in testing with some customers and expect first commercial installations as soon as events resume after C19 measures ease.
    Does this work on phones or just laptops? Is there dongle needed for the phone or is there a Signify app that converts the phone camera to phone internet?
    Our first commercial products are for laptops. It’s technically possible to connect the key to a tablet or smartphone, but we have not pursued this direction seriously because of the troublesome user experience. We are working with several OEMs to speed the incorporation of LiFi into mainstream devices, but it will take another 3 to 4 years before your smartphone contains the right chipset to connect to LiFi.
    I joined the webinar when it had already started... could it be possible to share more information please? What I heard was very interesting but I feel unable to make a question
    The webinar recording is available on this page and the slides can also be download here. If you would like more information or to discuss a potential project, we’d love to hear from you: lifi.systems@signify.com
    How can Trulifi be retrofitted into existing luminaires?
    Trulifi can be retrofitted into any of our luminaires that have the EasySense slot (and with a separate connection to the network). It can also be fitted standalone, separately from the lighting infrastructure.
    Light ON fully, data success to transmit. What about light decay, still can success transmit data?
    Trulifi communicates using an infrared light source that is independent of the main light source, so it works with the light dimmed or off. The communication area is very strictly defined - in the example of an office installation with a ceiling height of 1.8m the coverage area is 2.4m so there is no issue of light decay.
    If you offer broader spectrum ie LiFi (infrared) and UV-C you can sanitise equipment/surfaces/water as well as connectivity?
    Our parent, Signify, offers UV-C lighting and devices to disinfect air, surfaces and water. We will not combine this functionality with LiFi as you would not want to expose people to UV-C.
    What about airport lobbies, business class lounges?
    Yes, we have seen strong use cases for airport lobbies and lounges, and are working with an aviation partner also to incorporate LiFi inside the plane for passenger use. Our first inflight installation will launch early 2021.
    Is Trulifi a closed system or can the same access key with other Lifi providers? Are you working with major laptop and mobile device manufacturers to have the access key bullt into their devices? What do you see the major obstacle for LiFi to go main stream?

    Trulifi is based on ITU standard G.vlc which specifies the system architecture, physical layer and data link layer for high-speed indoor VLC transceivers. With very simple adjustments we can connect with other systems based on that same standard.

     

    We are working with several OEMs to speed the incorporation of LiFi into mainstream devices, but our biggest challenge is awareness, of LiFi as well as Trulifi, to really achieve scale.

    How many colleges and universities are you working with?
    We work with several universities in The Netherlands, Asia and the US.
    I am an Illumination Engineering 1st year student. How can I work in Li-Fi project? What I have to study before starting the project? Thank you
    We offer a number of internships, so you should visit our career webpage regularly for these opportunities.
    The hotel needs to provide an accessory or key for the client to connect it in their laptop, this would be the first question, the second that happens if I want to connect with my smartphone
    Yes. All discharge lamps contain mercury. Being the leader in lighting, Signify has been able to reduce the dosage of mercury to a minimum in the same way it is done for the much wider used fluorescent lamps. In addition lamps may also be recycled.
    Can you share more about how this unit is managed? Fault, Performance, configuration etc.
    Our LiFi components (USB keys and access points) have a web interface to manage them through a standard web browser. In addition, we will be adding support for Network monitoring and control based on SNMP and SSH later this year.
    Any lifi solutions in MEA?
    Trulifi is available worldwide. We have installations in several segments in MEA.
    So how can we implement Li-Fi solution?
    Trulifi systems are very simple to install and manage, and operate in much the same way as Wi-Fi. We’re always happy to discuss a project with you, or if you’d just like to try it out we offer a single meeting room kit-in-a-box you can order. Get in touch with us here: lifi.systems@signify.com
    MaxLinear?
    Yes, our system uses the MaxLinear baseband processor.
    Is there any project using lifi solution in the middle east and south african region ?! Also North africa ?
    Yes. We have installations in all regions of MEA.
    How does your Attocells compare to others?
    Our Trulifi system is ahead of the competition in terms of speed, a commercially certified and commercially available solution and is the first system that enables seamless roaming between LiFi access points.
    Is your connection NLOS?
    Line of sight is required for the operation of every LiFi system.
    My question would be on pricing
    This depends entirely on area coverage, nr of users etc.. As an indication, a meeting room fully equipped with LiFi starts from 2 to 2,5 k Euro, including USB access keys
    Can I do an Internship on Li-Fi Project in Trulifi? Please Consider my request.
    We do offer a number of internships, so you should visit our career webpage regularly for these opportunities.
    comparison of availability bandwidth of radio vs VLC
    The theoretical answer is roughly 1.000 times more spectrum available in light. On top of that we can re-use spectrum as the cells are smaller, and light does not travel thru a wall. Last but not least, we can sent in the future at much broader bandwidths, looking at multiple Gbps.
    Limitations of LiFi as on date vs wifi
    LiFi requires Line of Sight between the transceiver and receiving access key. If something blocks the Line of Sight the signal will be stopped. This is often described as the only real downside of LiFi, but it also provides a unique advantage – light cannot travel through walls so, unlike radio signals, LiFi communications always stay inside the room.
    Thank you for sharing the information, How are you planning to move on in Mexico? how does LIFI will be sold? do you have DATA SHEETS, to share? Thank you.
    Datasheets are available on the webpage, www.signify.com/trulifi . Yes we sell in Mexico, via the local Signify organization. 
    Of course if you have a potential project you’d like to discuss you can also contact us here lifi.systems@signify.com
    If I understood well: This is internet over light waves?
    Yes, we use light waves, instead of radio waves, to transmit data. The light spectrum has much bigger bandwidth than radio, and is much more stable and secure too. 
    Is Covid also an oppurtunity for LiFi?
    We do see several opportunities created by the pandemic. The opportunity for hotels to generate new revenue streams with coworking lobbies powered by Trulifi is one example.
    How signify will roll out LiFi to the projects, is it directly or third party conultants? Any standard specifications and guidelines!
    Our GTM is flexible, and depending on the segment we are delivering projects ourselves and also through third parties. If you’d like to work with us please get in touch!  lifi.systems@signify.com
    how much expensive for a group of concentrated users in a hotel
    For high performance WiFi hotels will often charge an additional fee. We can provide LiFi easily for the same or even less money than a typical premium internet fee.
    When do you expect optical receivers to be designed into modern technology, mobiles, laptops etc.?
    Actually smartphones and tablets already have optical receivers, as part of the camera functionality, but these devices are not yet able to process a LiFi signal. We are working with a number of OEMs to speed the incorporation of LiFi into mainstream devices. We estimate it will be 3 to 4 years before mainstream devices contain the right chipset to connect to LiFi.
    Will the transmitter performance be affected by blocking the optic path to the fob/receiver?
    LiFi requires Line of Sight between the transceiver and receiving access key. If something blocks the Line of Sight the signal will be stopped. This is often described as the only real downside of LiFi, but it also provides a unique advantage – light cannot travel through walls so, unlike radio signals, LiFi communications always stay inside the room.
    Any demerits of LiFi over Wifi except capital costs

    LiFi requires Line of Sight between the transceiver and receiving access key. If something blocks the Line of Sight the signal will be dropped. This is often described as the only real downside of LiFi, but it also provides a unique advantage – light cannot travel through walls so, unlike radio signals, LiFi communications always stay inside the room.

    We offer Trulifi as a fully managed OPEX service model, so cost is not necessarily a demerit.

    So we don’t have to use the dongle. Do you know when companies will design the receiver into the mobile/laptop?
    We are working with several OEMs to speed the incorporation of LiFi into mainstream devices. We estimate it will be 3 to 4 years before mainstream devices contain the right chipset to connect to LiFi.
    As trulifi would need a dongle to connect between the luminaries and the laptop, phone and tablet, is it convenient to connect the dongle with these devices?
    The uses of laptops, smartphones and tablets differ quite significantly. Our first commercial products are targeted at laptop users because although laptops are mobile, while in use they tend to be stationary, making them a perfect candidate for use with a USB access key.
    Which countries have you certificated this technology?
    Trulifi is compliant with all applicable European and North American regulations.