Voice over IP in a Deployable Headquarters SSgt W Quinn

1
Voice over IP in a Deployable HeadquartersSSgt
W Quinn Sgt D Gunn

• Modelling
• OPNET Modeller is based on a series of
  hierarchical editors that
• directly parallel the structure of real networks,
  equipment and
• protocols. Modelling the network consists of
• Project Editor - represents the topology of a
  communications network
• Process Editor detailed specification of
  protocols, resources and applications.
• Node Editor the architecture of a network
  device or system. Depicts the flow of data
  between functional elements. Shown below is the
  development from a plan to a node model.

Introduction In support of ARRC (Allied Rapid
Reaction Corps), 1 (UK) Signal Brigade has
developed Project Richelieu, a plan to replace
ATICS (ARRC Tactical Integrated Communications
System), with a commercial solution based on an
IP infrastructure, for Voice and Video
Teleconferencing over IP (VTCoIP), as well as
data, across ten deployed locations.
Results Experimentation has proven that
conferences can be hosted in the alternative
locations.
A simulated network has been developed, as can be
seen to the left, utilising OPNET to mirror the
Richelieu network so that traffic models of the
voice, data and VTC services can be applied to
assess the effect of failures and changes in
network configuration.

• Optimisation of the voice
• codecs improved the throughput
• for the most saturated links.
• 24 kbit/s - 100
• 16 kbit/s - 87
• 5.3 kbit/s - 80

Plan
Conclusions The planned network is able to
support all the required services. Once setup
using the syndicates results the network will be
resilient and continually available with the
option of further improving the network by
utilising alternate VoIP codec rates. As the
interaction between the VoIP and VTCoIP
conferences have been investigated thoroughly,
using different testing scenarios, information
can be provided on many eventualities.
Germany

• Simulation
• A series of stresses and strains were applied to
  test the network under realistic operational
  conditions. Examples of these were
• The effects of routing caused by a series of
  failures.

Aim To investigate and develop a configuration
plan for the optimisation of VoIP and VTCoIP
focusing on 1 (UK) Signal Brigades deployed
Richelieu network.
Recommendations Modelling has proven the concept
of the 5.3 kbit/s codec, however a VoIP quality
assessment should be made on a live network prior
to implementation.

• The effect of two minor and one major node
  failure, as requested by the sponsor.
• The effect of hosting the VoIP conference at
  alternate locations.
• The effects of increasing the conference load.
• The effects of hosting Ptarmigan.

• Objectives
• To ensure that the VoIP network is resilient and
  continually available. This has been looked into
  in detail with a document containing information
  for optimum configuration.
• These tasks are to be carried out whilst giving
  due consideration to the bandwidth requirements
  of the VoIP proprietary management system.

Hairpinning
Investigating the Hairpinning functionality of
the VX900 and its subsequent integration into
military trunk communication systems. It is felt
this could enhance the network significantly.
ICT Faculty, Royal School of Signals, Defence
College of CIS, Blandford Camp, BLANDFORD FORUM,
Dorset DT11 8RH