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Dublin Ad-hoc Wireless Network (DAWN)

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Dublin Ad-hoc Wireless Network

Southbound Dart status from Pearse Station


Dublin Ad-hoc Wireless Network (DAWN) is a project undertaken by the Networks & Telecommunications Research Group (NTRG) of Trinity College Dublin that aims to build a production ad-hoc network operational in the entire city of Dublin. DAWN aims not only to be a testbed for the research undertaken at the NTRG, but also to serve as a prototype 4th Generation Mobile Network.


The basic aims of DAWN are summarised below:
  • Building a production ad-hoc network in three main phases that will be operational in:
    • Phase 1: Parts of Trinity College campus (completed end of August 2002).
    • Phase 2: Trinity College Campus and Dublin city centre.
    • Phase 3: City-wide.
  • Test the scalability of ad-hoc networks.
  • Allow new 'ad-hoc' applications to be developed and deployed.
  • Provide a testbed for the research undertaken at the NTRG.

Current State

Currently the Dublin Ad-hoc Wireless Network (DAWN) has successfully completed Phase 1 (end of August 2002) and is fully operational in parts of the Trinity College campus:

DAWN Trinity College campus

The NTRG is at the moment actively working towards realising the second phase of DAWN. When Phase 2 is complete, DAWN will cover the entire Trinity College campus, as well as parts of the Dublin city centre.

Dublin city centre


The NTRG has developed a number of applications that work on top of the Dublin Ad-hoc Wireless Network (DAWN):
  • Ad-hoc Chat: An application that can be utilised in order to allow the communication of nodes participating in the ad-hoc network via text messages.

  • Ad-hoc Chat Ad-hoc Chat
  • 4GPhone: A demonstrator of some of our ideas on where 4th generation telephony is going. This is comprised of a simple person-to-person telephony using the Session Initiation Protocol (SIP) as the signalling protocol, and DSR as the ad-hoc routing protocol.

  • 4th Generation Telephony application

The NTRG Protocol Stack

The NTRG ad-hoc protocol stack employs a generic layer architecture that seeks to allow a LEGO-like approach to the development and assembly of networking protocols:
  • Wireless support: 802.11b, VHF Amateur, Radio, IrDa, Serial line.
  • Routing protocols: DSR, OLSR, ZRP, AODV.
  • Encryption: AES (Rijndael), Blowfish.
  • Error detection: CRC-32.
  • P2P: Nom - Name resolver, MANIFOLD (Overlay network constructor ...reminiscent of Microsoft PASTRY).
  • Applications: Instant messenger, web access, 4th generation phone, interactive spaces apps...

The NTRG protocol stack

Last Modified 20 September 2002