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KEY WIRELESS NETWORKING TECHNOLOGIES IN THE NEXT DECADE - OVERVIEW PowerPoint Presentation
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KEY WIRELESS NETWORKING TECHNOLOGIES IN THE NEXT DECADE - OVERVIEW - PowerPoint PPT Presentation


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KEY WIRELESS NETWORKING TECHNOLOGIES IN THE NEXT DECADE - OVERVIEW. * WIRELESS LANs * SATELLITE NETWORKS * AD HOC & SENSOR NETWORKS (MARIO GERLA, I. AKYILDIZ) * WIRELESS MESH NETWORKS (NITIN VAIDYA, HARI B.) * WiMAX * COGNITIVE RADIO NETWORKS * (MOBILE SOCIAL NETWORKS!!).

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key wireless networking technologies in the next decade overview
KEY WIRELESS NETWORKING TECHNOLOGIES IN THE NEXT DECADE - OVERVIEW

* WIRELESS LANs

* SATELLITE NETWORKS

* AD HOC & SENSOR NETWORKS (MARIO GERLA, I. AKYILDIZ)

*WIRELESS MESH NETWORKS (NITIN VAIDYA, HARI B.)

* WiMAX

* COGNITIVE RADIO NETWORKS

* (MOBILE SOCIAL NETWORKS!!)

communication networking in challenging environments
COMMUNICATION/NETWORKING IN CHALLENGING ENVIRONMENTS
  • UNDERGROUND APPLICATIONS
  • UNDERWATER APPLICATIONS
slide4

Wireless Underground Sensor NetworksI.F. Akyildiz and Erich Stuntebeck, “Wireless Underground Sensor Networks: Research Challenges”, Ad Hoc Networks (Elsevier) Journal, Nov. 2006.

Sink

Soil Condition

Sensor

  • Water
  • Salinity
  • Temperature
applications
APPLICATIONS
  • Sports field monitoring
    • Golf courses
    • Soccer fields
    • Baseball fields
    • Grass tennis courts
further applications
FURTHER APPLICATIONS
  • Infrastructure monitoring
    • pipes
    • electrical wiring
    • liquid storage tanks
    • underground fuel tanks
    • septic tanks
  • Border Patrol and Security
further applications7
FURTHER APPLICATIONS
  • Coal Mines (TUNNELS)
  • Diamond/Gold/Platinum Mining (TUNNELS)
underground challenges
Underground Challenges
  • Power Constraints
    • Difficult/impossible to change the batteries for underground devices
    • High radio power necessary due to extreme path losses
  • Low data rate
    • Channel conditions are best at low carrier frequencies
    • Less bandwidth is available at lower frequencies
underground challenges10
Underground Challenges
  • Antenna Design
  • Extremely Lossy Environment
    • Strong FEC needed to help overcome weak signals, but must not use excessive energy in processing
underground challenges11
Underground Challenges
  • EM Waves or
  • Magnetic Induction or
  • Seismic Waves????
underground challenges12
Underground Challenges
  • MODULATION (EARLY WORK  ANALOG COM.)

(LATELY’04  QPSK, QAM 16, QAM 32); 4kHz carrier,10W, 2kbps)

  • Capacity Study
  • Tradeoff between Capacity and Reliability
  • MAC
  • Routing
  • End-to-End Reliability
  • Error Control
  • Packet Size
slide13

UNDERWATER NETWORKINGI.F. Akyildiz, D. Pompili, T. Melodia, “Underwater Acoustic Sensor Networks: Research Challenges”,Ad Hoc Networks (Elsevier) Journal, March 2005

  • Available bandwidth is severely limited
  • UW channel is severely impaired (in particular due to

multi-path and fading)

  • Very long (5 orders of magnitude higher than in RF

terrestrial channels) and extremely variable propagation

delays

characteristics of underwater networks
CHARACTERISTICS OF UNDERWATER NETWORKS
  • Very high bit error rates and temporary losses of

connectivity (SHADOW ZONES)

  • Battery power is limited and usually batteries cannot be

recharged; no solar energy!!

transmission loss urick prop model
Transmission Loss (URICK PROP. MODEL)

Attenuation due to multipath

Attenuation due to absorption

Attenuation due to geometric spreading

TL increases with increasing freq. & distance

our contributions for uw asns
Our Contributions for UW-ASNs

SensorApp

Developed @BWN-Lab:

-AcousticProp Model

-AcousticChannel

-AcousticPhy

-CDMA-based MAC

-SensorRouting

WirelessAgent

SensorRouting

LL

Queue

CDMA-based MAC

AcousticPhy

AcousticProp Model

AcousticChannel

slide17

CROSS LAYER SOLUTION D. Pompili and I.F. Akyildiz, “Cross-layer Protocol Suite for Underwater Acoustic Sensor Networks,” July 2007

Traditional Approach

Cross-Layer

Melting

Application Layer

Application Layer

Transport Layer

Network Layer

Energy Management Plane

Energy Management Plane

Cross -Layer

MODULE

Cross-Layer Management Plane

Cross-Layer Management Plane

MAC Layer

PHY Layer

Our View

what is the status
WHAT IS THE STATUS?

PAPER WRITING RACE STARTED !!!!

COMMUNICATION PROTOCOLS !!!

MODULATION TECHNIQUES ((D) PSK, 16 QAM), OFDM??

SYNCHRONIZATION ALGORITHMS

LOCALIZATION ALGORITHMS

CAPTURING THE MOBILITY OF AUVs

SECURITY

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what is the status19
WHAT IS THE STATUS?

CAPACITY ANALYSIS

TRADEFOFF RELIABILITY vs CAPACITY

DEPLOYMENT (TOPOLOGY) ALGORITHMS

ERROR CONTROL (FECs, HYBRID ARQs???)

IN-NETWORK CODING (AGGREGATION/FUSION???)

MULTIMEDIA COMMUNICATION

Etc.etc…..

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