Communication in heterogeneous ad hoc grid Shan Natarajan

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Communication in heterogeneous ad hoc grid Shan Natarajan

Communication in heterogeneous ad hoc grid Shan Natarajan

Ad Hoc Networking n The art of networking without a network § No fixed

Ad Hoc Networking n The art of networking without a network § No fixed infrastructure § Hosts act as routers § Multihop communication

Characteristics n n Dynamic topology Bandwidth constrained Energy constrained Less secure

Characteristics n n Dynamic topology Bandwidth constrained Energy constrained Less secure

Heterogeneous Ad Hoc Network n Different types of entities § Primitive devices with low

Heterogeneous Ad Hoc Network n 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

Motivation n Network centric computing is about computational grids Ad hoc grid is a

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

IETF MANET Work Group n n n Goals Long term goals Research in routing

IETF MANET Work Group n n n Goals Long term goals Research in routing protocols n n Proactive protocols Reactive protocols

Specific Objectives n n Sparsely populated heterogeneous ad hoc network Define a precise model

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

Literature n A review of current routing protocols for ad hoc mobile wireless networks

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