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About gabrielcarvfer

  • Title
  • Birthday 1992-08-21

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  • Gender
  • Location
    Brasília, Brazil
  • Interests
    Anything that can give an electric shock and/or can be programmed.

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1,758 profile views
  1. gabrielcarvfer

    Windows 10 Insider Topic

    Yes. The rollout is done in phases, so it may take some time until the update appears for you. https://blogs.windows.com/windowsexperience/2019/05/21/how-to-get-the-windows-10-may-2019-update/#YLqXUpvOU32fIZfT.97
  2. gabrielcarvfer

    Epic (or supergiantgames) randomly raise prices... during sale

    Meh, worst part is not being able to buy the damned game on Steam or GOG...
  3. gabrielcarvfer

    Chrome OS 74 will disable Hyper-Threading by default

    Correction: you'd have to be insane to mine on your own Chromebook. Don't you remember Coinhive?
  4. gabrielcarvfer

    Chrome OS 74 will disable Hyper-Threading by default

  5. gabrielcarvfer

    Microsoft Cancels "Sets"

    I want my tabs back... BTW, he is not the product manager for the desktop experience/explorer, but for the terminal/console. The other teams might be porting Sets to chredge.
  6. gabrielcarvfer

    Just how FAST is WiFi 6?

    Sure. A shallow version: - the LTE and WiFi PHY layers can transmit/receive the same stuff (modulation a.k.a. waveform and encoding); - the MAC layers of WiFi and LTE are completely different, the first based on CSMA and the second on OFDMA, etc; - because the MACs are not compatible, you usually have one interface for each technology; - one of the top layers of the LTE stack is the PDCP, that provides a logical connection to the internet (it is encapsulated, compressed, tunneled through the LTE infrastructure, uncompressed, and then transmitted to the internet); - some researchers recreated that PDCP layer on top of the current WiFi network stack, and managed to replicate the same logical connection, but using the WiFi and the ISP network to reach the mobile carrier network through the internet; - if the ISP/mobile carrier has remote access to your router (and they usually have), they can do the WiFi authentication for both your WiFi interface and access points, without requiring you to be in range or your manual intervention, using the mobile connection. TL;DR: if the cloud has access to manage every router in the world, they can let you use all those access points to transmit data along with your mobile connection, without requiring your manual intervention. AP selection, association request and authentication is controlled by the cloud. You can find the paper in the following address: https://nitlab.inf.uth.gr/NITlab/publications/601-cloud-based-convergence-of-heterogeneous-rans-in-5g-disaggregated-architectures People say 5G will supplant WiFi, but I doubt. I think WiFi will become part of the 5G infrastructure and, if everything goes according to the plan, you will forget it even exists.You will buy an AP, connect it to the internet and boom, everything is properly configured, your mobile connection is working at peak performance and you don't have to authenticate anything ever again because you already have your carrier to do the authentication and roaming for you.
  7. gabrielcarvfer

    Just how FAST is WiFi 6?

    It's the first step. Using old tech won't help. Absolutely correct. An US$180 Ubiquiti nanoHD AP is sold in Brazil for US$300~400. I agree. With thick masonry walls, the attenuation is pretty severe and a ton of 5GHz APs throughout the house is the best solution. Mesh is probably a bad idea because you would end up either putting your APs in line-of-sight of each other, or rely on 2.4GHz channels. I would use either Powerline APs or wire the entire house. Partially correct. The modulation and coding schemes are basically the same; LTE-LAA already works on both 2.4GHz/5GHz bands that WiFi uses; 802.11ax supports OFDMA, also used by LTE. The main incompatibilities are on the stacks, but there's nothing preventing a virtual PDCP layer on top of the WiFi stack plus using the cloud to manage and authenticate user association, effectively merging WiFi APs into the 5G access network.
  8. gabrielcarvfer

    Just how FAST is WiFi 6?

    Partially correct. The standards are not related to each other, but 5G will support an access network built with different technologies (e.g. WiFi, 5G NR, LTE, etc). Did you see the Microsoft Hololens presentation of the VR/AR spatial anchors? Basically the same thing, but for networks. You will probably have a mobile connection serving as an anchor and be served with connection from various sources, depending on where you are and what's the best way to deliver your service.
  9. gabrielcarvfer

    Just how FAST is WiFi 6?

    That's part of what 5G promised and manufacturers are already working on that. :)
  10. gabrielcarvfer

    Just how FAST is WiFi 6?

    Yup, although I'm not really sure how MIMO techniques and beamforming work together in a power constrained scenario. I know for sure that in a 5G mmWave testbed, they measured 10~13dB gain at Line-of-Sight from a 8x8 antenna array while using beamforming (for each +3dB, you get 2x the sensibility/tx power). Source: https://ieeexplore.ieee.org/document/8108648 .
  11. gabrielcarvfer

    Just how FAST is WiFi 6?

    Yup, MIMO can give you better gain, so you get better range with the same transmission power and antenna gains.
  12. gabrielcarvfer

    Just how FAST is WiFi 6?

    CSMA is stochastic by definition. In CSMA/CA, you only use RTS/CTS after sensing the channel and verifying it's idle, but you can still have collisions with other devices that did the same. In OFDMA, you have a schedule table saying when\where you're supposed to send and receive data, preventing collisions with other devices. The weird part is that you use CSMA/LBT in both WiFi 6/LTE-LAA to get control of the channel, and then you transmit with OFDMA, but you end up reducing latency quite dramatically.
  13. gabrielcarvfer

    Just how FAST is WiFi 6?

    The manually switching channels part still real, because multiple access points (APs) will still exist within the same channel and will continue to be a problem for 2.4GHz band. AFAIK, APs will still work on transmission opportunities (TXOP) for backwards compatibility reasons, and will schedule resources during that TXOP (just like LTE-LAA). There is no spectrum orchestration between APs from different networks/vendors/deployment to reduce contention if using the same channel. The wake-up thing changes were also inspired by LTE/5G-NR and really is a huge improvement to reduce stupid transmissions. \o/
  14. gabrielcarvfer

    Family of man killed by his Model X on autopilot sues Tesla

    No, it's not. Autopilot = automatic pilot, not autonomous pilot. Automatic and autonomous are not the same thing. Autopilot is a form of driving/piloting assistance.
  15. gabrielcarvfer

    Family of man killed by his Model X on autopilot sues Tesla

    That's not what autopilot means. Airplane autopilots are not fully autonomous and I doubt you don't call them autopilots... Yes, it is.