Communication Scheme for Loosely Coupled Mobile User Groups in Wireless Sensor Fields

1
Communication Scheme for Loosely CoupledMobile
User Groups in Wireless Sensor Fields

• Euisin Lee, Soochang Park, Fucai Yu, Min-Sook
  Jin, and Sang-Ha Kim
• Department of Computer Engineering,
  Chungnam National University, Republic
  of Korea
• WCNC 2009
• 2009/05/19
• Reporter ???

2
OUTLINE

• INTRODUCTION
• DISTRIBUTED DATA GATHERING TREE ESTABLISHMENT
• DATA-CENTRIC INFORMATION MULTICASTING
• PERFORMANCE EVALUATION
• CONCLUSION

3
INTRODUCTION

• The tightly coupled user group means that there
  are direct communication channels among all
  mobile users.
• In case of the loosely coupled mobile user group,
  a wireless sensor network is only communication
  channel among the mobile users.

4
DISTRIBUTED DATA GATHERING TREE ESTABLISHMENT
5
DISTRIBUTED DATA GATHERING TREE ESTABLISHMENT
(Cont.)
6
DISTRIBUTED DATA GATHERING TREE ESTABLISHMENT
(Cont.)

• Kruskalss algorithm

7
DISTRIBUTED DATA GATHERING TREE ESTABLISHMENT
(Cont.)
8
DATA-CENTRIC INFORMATION MULTICASTING

• A. Agent Node Selection and Information Request
• B. Information Multicasting from a Sink to All
  Agent Nodes
• C. Information Relaying from Agent Nodes to
  Mobile Users

9
PERFORMANCE EVALUATION
10
PERFORMANCE EVALUATION

• They simulate the proposed scheme on QualNet
  simulator.
• TTDD two-tier data dissemination
• DSM dynamic sink model

11
PERFORMANCE EVALUATION
12
PERFORMANCE EVALUATION
13
PERFORMANCE EVALUATION
14
CONCLUSION

• The single data gathering tree is constructed to
  be shared by loosely coupled mobile users.
• The way about multicasting based on the shared
  tree propagates collected information to multiple
  users of the loosely coupled group to reduce
  communication costs.