Grand Challenges for Wireless Network

• Speaker: Dr. Changjoo Lee (Korean University of Technology)

Grand Applications

• Grand Application 1: Ubiquitous Connectivity
  • Mobile anytime-anywhere communications in support of:
    • Human interaction
    • Entertainment
    • Computing & Control
  • Seamless mobility over different platforms & tecnologies
    • CONTINUITY of EXPERIENCE
  • Technical Hurdles:
    • Bandwidth everywhere (at home, on the road, at airport, airplane...)
    • Low delay
    • Security, etc.
• Grand Application II: Disaster Recovery Networks
  • Rapidly deployed to recover from:
    • Natural disasters
    • Major Malicious attacks
  • Isolated areas can be connected via high-BW unmanned aircrafts & satellites
  • Onsite-emergency
    • -> save thousands of lives!
  • Technical Hurdles:
    • Bandwidth
    • Delay
    • Interoperability
• Grand Application III: Universal Sensing
  • Food Supply Chain Management
    • Deploy massive sensor & RFID based networks
      • detech pathogens from farm to customers
  • Environmental Monitoring/Control
    • Use dense, highly distributed reconfigurable sensor fiels
      • Early warnings from natural disasters
      • Prevention & diagnosis of structural failures in buildings, bridges, etc
      • Con trol of healthcare facilities
      • Study of animal behavior
  • Technical Hurdles:
    • Network lifetime
    • Dynamic configurability
    • Enormous scalability
    • Coverage
    • Energy efficiency
• Technical Hurdles:
  • Significant improvement in performance
  • Multi-hop networking is important
  • Security & reliability
  • Interoperability

Grand Challenges

Grand Challenge I: Cross-layer Design

Motivation

• Traditionally,
  • Networks have been designed based on a layered architecture
  • Different functionalities are implemented in each layer
• Optimizing within layers has reached a point of diminishing returns
• To satisfy the increasing demands of new wireless apps, a cross-layer perspective is essential
  • Ex: energy consumtion needs information about the number of hops
• Already used in some wireless systems W-CDMA

Dilemma

• Need to improve efficiency
• Potential loss of modularity due to coupling
  • may lead to complex & fragile overall design
• -> "Loose-coupling" Cross-layer Design

Grand Challenge II: Information Theory for Wireless Networks

• Open problems:
  • Scalability
  • Security
  • Network Coding

Other Grand Challenges

• Resilient & Secure Networks
• Efficient Interoperability
• Economic Mechanisms for Efficient Markets

Conclusion

• Future is still bright & holds greater & grander challenges
• Our mission

Future Research

• Cross-Layer Design of Wireless Networks
• Sensor Networks with Data Aggregations

Questions?

• Email: cjoo@kut.ac.kr
• URL: http://netlab.kut.ac.kr