FlashlinQ – Direct Device-to-Device Communication Technology
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FlashlinQ – Direct Device-to-Device Communication Technology






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FlashlinQ – Direct Device-to-Device Communication Technology FlashlinQ – Direct Device-to-Device Communication Technology Presentation Transcript

  • Future of Wireless? The Proximate Internet Rajiv Laroia COMSNETS, January 7, 2010
  • FlashlinQ – Direct Device-to-Device Communication Technology Over Licensed Spectrum No Infrastructure Needed 2
  • Where We are Today•  Wireless –  WAN •  1G – Analog voice •  2G – Digital voice •  3G/4G – Broadband data/voice •  No notion of physical location or proximity –  LAN •  WiFi •  Bluetooth •  Ad hoc networks (WiFi P2P mode)•  Wired –  Ethernet – local –  Internet •  Global •  No notion of physical location or proximity We Are Social Beings That Interact With The Physical World Around Us 3
  • FlashlinQ – The Vision
  • Consider a Place QUALCOMM Proprietary and Confidential 5
  • Perhaps a “Neighborhood” QUALCOMM Proprietary and Confidential 6
  • or the “Mall” nearby QUALCOMM Proprietary and Confidential 7
  • or your “Home” QUALCOMM Proprietary and Confidential 8
  • or someone’s “Office” QUALCOMM Proprietary and Confidential 9
  • ...and how these places relate to people 10
  • and things, 11
  • and wireless, 12
  • And then consider... QUALCOMM Proprietary and Confidential 13
  • amidst these places, 14
  • the Internet is being Embedded. 15
  • Sometimes with great fanfare! (3G) (all people will be connected!!!) 16
  • but more often silently… (so will all things…) 17
  • And then consider... 18
  • that your mobile Internet device 19
  • walks about as if blindfolded 20
  • to itsPhysically-Proximate Internet. 21
  • Need for a Proximate InternetProximate Internet compliments the Internet, does not replace itMobile/fixed ‘devices’ communicate with nearby mobile/fixed ‘devices’Think of devices as ‘higher layer entities’ such as applications or services•  Location based services over 3G networks –  Mobile-to-fixed (could also be mobile-to-mobile)•  Bluetooth based proximate services –  File/content sharing – mobile-to-mobile –  Local advertising – mobile-to-fixed•  WiFi based in home services –  Apple devices using Bonjour – mobile-to-fixed or fixed-to-fixed 22
  • Current Solutions for ProximateInternet - Centralized•  WAN-GPS based approach –  Mobile WAN devices determine location using GPS –  Devices communicate their location to a ‘God-Box’ in the network –  God-Box tracks all devices –  God-Box informs devices of services and mobiles in their vicinity•  Issues with WAN-GPS based approach –  GPS consumes power –  GPS unreliable Indoors –  Privacy concerns with God-Box tracking everything –  Uses expensive WAN capacity –  Does not cover non-WAN devices –  Does not scale well for high device density –  Closed business model – slower innovation in services 23
  • Current Solutions for ProximateInternet - Distributed•  WiFi based –  Generally mobile-to-fixed infrastructure –  Mobile-to-mobile with WiFi P2P mode•  Bluetooth based –  Direct device-to-device communication –  Master/slave devices (not P2P)•  Issues with WiFi/Bluetooth based approaches –  Device discovery power hungry – no automatic discovery –  Very small range – cannot be increased (unlicensed spectrum) –  Existing Phy/Mac not designed to scale with device density –  No power efficient paging capability in WiFi –  Evolution of standard preserves Phy/Mac for backward compatibility 24
  • FlashlinQ Overview
  • Requirements of Proximate InternetFlashlinQ•  Discovery – establishing need to communicate –  Devices (application) discover all other devices within range (upto ~ mile) •  Capable of discovering thousands of devices •  Identify only authorized devices (privacy maintained) –  Automatic power efficient discovery every 10 seconds•  Paging – initiating communication –  Link established through paging –  Paging ability once a second•  Communication –  Once link established, devices can securely communicate –  ~2 msec framing –  All pairs that can coexist communicate simultaneously •  Orthogonalization/reuse tradeoff - high system capacity Synchronous technology Licensed spectrum 26
  • System Vision•  One must be able to see many things…•  One should see a higher layer entity…•  One must be able to speak with what one sees…•  One must be able to trust that which one speaks with…•  One’s IP sessions should move to/from FlashLinQ as necessary… 27
  • QUALCOMM Proprietary and Confidential 28
  • Proximate D2D NAN(Neighborhood Area Network) QUALCOMM Proprietary and Confidential 29
  • Autonomous Advertisements… School: Polling Place Mobile Notary Public Grocer -> ½ off Salami Local Seamstress Taxi: for Hire - > Heading to NYC, need a ride? Courier: for Hire QUALCOMM Proprietary and Confidential 30
  • Discovering what one Good to cares about nearby… know Johnny is near home The “Neighborhood Watch” Cmte A School Field TripA Family out for the day QUALCOMM Proprietary and Confidential 31
  • Communicating with it… “Media Swap” In-building Automation Control Mobile Social Network “Profile Matching” “Multi-player” Neighborhood Gaming“Proximate Context- aware Gaming” “Vouch” – building 3rd-party Trust Nets “FlashPay” – eCash between eWallets QUALCOMM Proprietary and Confidential 32
  • FlashlinQ: A Clean Slate Approach to D2D Buddy Gamers Desired link Advertisers Interference link Unknown Discovery D2D Communication FlashlinQ 1.  Discovery Autonomicity, Range and Number of Devices 2.  Self Organized Device-to-Device (D2D) Communication 3.  Session Mobility to/from FlashlinQ & Cellular/WiFi/etc. 33
  • Autonomous Expression Advertisements… Incoming AdvertsAll uniquely visible and trackable Even as I advertise FlashlinQ Devices “see” past each other 34
  • Ad Hoc Direct Transmission to Nearby Devices FlashlinQ Devices dynamically trade-off spectral reuse and orthogonality1) Slot-by-slot, half-duplex scheduling(devices cannotsimultaneouslysend and receive)2) Each slot contains a“feasible” transmissionlink set (senderscannot “blind”receivers) 3) Unicast (and Broadcast) support FlashlinQ Devices can “talk” past each other 35
  • Technical Challenges in FlashlinQ design•  Large wireless dynamic range >100 dB –  All wireless systems need to deal with this range •  WAN – unrestricted association •  WiFI – orthogonalization –  FlashlinQ – timing synchronization & slotted orthogonalization•  Half-duplexing –  Device cannot transmit and listen at the same time –  While device is transmitting, it cannot monitor signals from other devices•  TDD –  Traditional TDD has a predetermined FL/RL partition –  Unlike traditional TDD, TX and RX partition in P2P may not be fixed a priori or determined by a centralized controller•  Distributed scheduling –  WAN – centralized scheduling by the basestation –  FlashlinQ – distributed scheduling where each device independently decides to transmit or not 36
  • Applications of FlashlinQ•  Coordinate unlicensed spectrum communication –  Multichannel WiFi – discovery & paging –  White-space communication•  Social networking –  Discover friends in the vicinity –  Find people that share common interests•  Mobile advertizing –  Neighborhood stores – products & services –  People offering services•  Remotely control devices around you•  … 37
  • Thank YouQuestions/Comments? 38