Thursday 2 August 2012

What I understood an HLA to be

I suppose it's fair say that there is quite inadequate literature on HLA. I have been talking to people and reading about HLA in bits and pieces. The federates can basically chit-chat with each other by two means :

1. Publishing and Subscribing Objects

2. Sending and Receiving Interactions

Let us consider a case where two federates communicate by publishing and subscribing objects. Let us consider two federates ns3 and dummy, the process of having multiple federates running though a RTI can be summarised as below:

1. Both federates publish and subscribe object through the RTI.

2. Whenever one federate changes any attributes of the object, a callback is send by the RTI to the federate and also the changed attributes.

3. RTI only grants a time advance request when all federates have finished their simulation till the present time.

This is how the entire federation works.
  

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