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Ad hoc networks will be an important part of our vision of the 4G Telephony environment. Ad hoc networks should be able to robustly adapt to
changing network conditions and topologies, having the capability to grow, fragment and reorganise in the absence of centralised, hierarchial infrastructures.
They have many civilian and military uses, whether in infrastructureless environments or as means to extend the boundaries of traditional networks.
As part of our ongoing research into ad hoc networking we have implemented some protocols proposed by the ad hoc networking community.
These protocols have been implemented on both
the Win32 and WinCE platforms, allowing us to evaluate ad hoc systems on desktop PCs, laptops and PDAs.
At the physical communications level we use a
combination of 802.11 wireless ethernet cards, 433MHz radios and IrDA.
Dynamic Source Routing - DSR
It is a reactive ad hoc networking protocol currently under consideration by
Our implementation broadly conforms to the DSR MANET draft of March, 2001.
It also includes modifications which we determined necessary during the process of implemenation and evaluation.
Many DSR links and papers may be found at the CMU site.
Optimised Link State Routing - OLSR
This is a proactive ad hoc networking protocol also currently under consideration by
Again, our implementation conforms to the OLSR MANET draft of March, 2001.
Multipoint Relaying: An Efficient Technique for Flooding in Mobile Wireless Networks describes the main optimisation techniques employed by OLSR.
A Zone Routing Protocol hybridising mechanism has also been put in place allowing us to leverage optimal performance from both routing protocols.
Design, implementation and evaluation of improved ad hoc network protocols.
Development of a dynamic architecture enabling real-time
re-configuration of the ad hoc networking systems.
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