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Opportunistic Routing in Multi-Sink Mobile Ad Hoc Wireless Sensor ...

Opportunistic Routing in Multi-Sink Mobile Ad Hoc Wireless Sensor ...

Introduction ikom -

Introduction ikom - ComNets ● Wireless Sensor Network (WSN) – large scale network of sensor nodes ● Deployment of nodes changes frequently in mobile WSN ● Mobile nodes - opportunistic elements for packet relay ● Limitations of many existing routing protocols: – single sink structure – no or only limited mobility ● Routing in WSN with Multiple Sinks requires new approach ● Intermittent connectivity, mobility and power consumption are the main challenges for many routing protocols

Opportunistic Routing Introduction ● Unicast routing technique for multi-hop wireless networks ● Optimal transmission only when conditions are favorable ikom - ComNets ● Based on geographic routing – awareness of surrounding neighbors and their specific locations – awareness of channel quality – not a single candidate, but a set of candidates is used – election of next hop according to node availability – Network Layer (NET) selects furthest node which is closest to the destination ● NET + MAC. Final decision in MAC by candidate connectivity ● Challenge: nodes must agree which of them is forwarder ● Overhead is expected in denser networks (high neighborhood cardinality) ● Powerful and well-suited for sensor networks (intermittent connectivity)

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