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Suri-IEEE-Comm 2010

Peer-to-Peer Communications for Tactical Environments: Observations, Requirements, and Experiences

Suri et al

p2p peer-to-peer tactical edge networking

@article{suri:ieee-comm2010,
  title={Peer-to-Peer Communications for Tactical Environments:
         Observations, Requirements, and Experiences},
  author={Niranjan Suri and Giacomo Benincasa and Mauro Tortonesi and
          Cesare Stefanelli and Jesse Kovach and Robert Winkler and
          Ralph Kohler and James Hanna and Louis Pochet and
          Scott Watson},
  journal={{IEEE} Communications},
  year={2010},
  month={October},
  volume={48},
  number={10},
  pages={60--69},
}

[ Overview slides ]

Tactical edge networks have unstable links, limited bandwidth, variable latency, poor connectivity due to challenging terrain, interference

Client-server architectures, including service oriented, commonly used in higher echelons

  • Not applicable to tactical edge due to network limitations, single points of failure
  • Different communication model, much shared/multicast/group traffic
  • Locating a centralized registry can be problematic

P2P applicable to this setting

  • Continue to function with partially degraded capabilities under failures
  • Utilize group messaging mediums, wireless broadcast
  • Natural mapping between information needs and geography, implicitly echoed by many protocols
    • Proximity/precision correlation
    • Many requests constrained by geometry, e.g., imagery of particular area

Networks typically constructed of clusters of 10--20 nodes, connected by some sort of backhaul

Resource discovery is a critical task

  • As is continued awareness of that resource

Requirements

  • Automatic configuration
  • Bandwidth efficient peer discovery
  • Peer loss discovery
  • In-network data transformation to match network capabilities, resource requirements
  • Adaptive dissemination
    • Many messaging models at play in tactical networks: Broadcast, unicast, groups, etc
    • Work with prioritization, update rates, relability, sequencing requirements to most efficiently meet requirements
  • Disruption tolerant dissemination
    • Must handle periodic disconnects
    • Efficiently deal with loss, e.g., forward error correction, scattering
  • Provenance
  • Policy based control over dissemination
  • Integration w/ SOA

Group messaging controls

  • Frequency of advertisement adjusted based on movement, churn
  • Strength of advertisement, number of hops or geographic distance to cover

Groups identified by labels with simple hierarchical structure

  • mil.army.arl.hf2004.ugvs
  • Nodes may belong to multiple groups, advertise differently in each
  • No single view of group membership exists
  • DHTs rejected due to incompatibility with churn, low bandwidth

Opportunistic listening

Nodes set their own reliability and sequencing requirements for traffic

  • Receivers must manage their own reliable delivery, may have different requirements

Reliable flooding, epidemic, and heuristic dissemination protocols

  • Heuristic: E.g., to favor routing through a UAV overflying the area

For large messages only metadata is transferred; receivers then request data

Comparison against JXTA because it was chosen for SOSCOE

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