Requirements

  • Full-duplex
  • Multi-party
  • Mobile (DC powered for car or yacht)
  • 100m range?

Extra requirements

  • Free to talk
  • Independent of mobile data connections

Physical and Data Link Layer

Bluetooth

  • 100m range from an in-car transmitter is possible

SMesh

  • no devices on the market?

802.11s


Wifi

  • mobile phone ~30m range is too short
  • in-car basestation

Ideas

  • Local wifi hotspot (range?)
  • Mesh networking
  • Android audio-conferencing app?
  • TomTom integration?
  • Teamspeak?