Communication in heterogeneous ad hoc grid

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Communication in heterogeneous ad hoc grid

• Shan Natarajan

2
Ad Hoc Networking

• The art of networking without a network
• No fixed infrastructure
• Hosts act as routers
• Multihop communication

3
Characteristics

• Dynamic topology
• Bandwidth constrained
• Energy constrained
• Less secure

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Heterogeneous Ad Hoc Network

• Different types of entities
• Primitive devices with low resources
• Sophisticated devices with high resources
• Asymmetric Links
• Can hear another node but cannot send messages to
  that node

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Motivation

• Network centric computing is about computational
  grids
• Ad hoc grid is a particular scenario
• Typical application areas
• Military
• Relief operation in disaster areas
• Archaeological surveys

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IETF MANET Work Group

• Goals
• Long term goals
• Research in routing protocols
• Proactive protocols
• Reactive protocols

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Specific Objectives

• Sparsely populated heterogeneous ad hoc network
• Define a precise model of the system
• Asymmetric links
• Existing protocols
• New protocol ?

8
Literature

• A review of current routing protocols for ad hoc
  mobile wireless networks
• E.M Royer, C-K Toh
• Location aided routing in mobile ad hoc networks
• Y.B Ko, N.H.Vaidya
• GAHA and GAPA Approaches for link asymmetry in
  mobile ad hoc networks
• D. Kim. H. Jeong C-K Toh