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Thursday, 4 April 2019

UAV NETWORKS in IoT

Features of UAV Networks
  • Mesh or Star networks.
  • Flexible deployment and management of new service using SDN.
  • Routing protocol be adaptive in nature.
  • Contribution towards greening of the network.
  • Multi-tasking.
  • Large converage area.
  • Easily reconfigurable for varying missions.
Key Issues
  • Frequently change in network topology.
  • Relative position of UAV may change.
  • Malfunctioning of UAVs.
  • Intermittent link nature.
  • Lack of suitable routing algorithm.
Considerations in UAV Networks




UAV Network Constraints



UAV Network Advantage



UAV Network Topology : Star
  • Typically two types -

          - Star configuration.
          - Multi-star Configuration .
  • In Star Configuration , UAV is directly connected to the ground station.
  • In Multi-star Configuration, UAVs form multiple star topology . One node from each group connects to the ground station.
  • High latency.
  • Highly dependent on ground station.


UAV Network Topology : Mesh
  • Typically two types -
            - Flat Mesh Network,
            - Hierarchical Mesh Network.
  • Flexible
  • Reliable
  • Nodes are interconnected
  • More secure

UAV Topology Comparison



FANETs : Flying Ad Hoc Networks
  • Network formation using UAVs which ensures longer range, clearer line of sight propagation and environment-resilient communication.
  • UAVs may be in same plane or organized at varying altitudes.
  • Besides self-control, each UAV must be aware of the other flying nodes of the FANET to avoid collsion.
  • Popular for disaster-time and post-disaster emergency network establishment.

Feartures :
  • FANET Inter-plane communication
  • FANET Intra-plane communication
  • FANET - Ground Station communication
  • FANET - Ground Sensor communication
  • FANET - VANET communication


Ad-Hoc FANETs
  • A2A links for data delivery among UAVs.
  • Heterogeneous radio interfaces can be considered in A2A links, such as XBee-PRO (IEEE 802.15.4) and Wi-Fi (IEEE 802.11).
  • Ground networks may be stationary WSNs or VANETs or Control stations.
  • UAV-WSN link-up may be used for collaborative sensing as well as data-muling.


FANETs & VANETs





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