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NetSimIntQueueAnalyser should raise RuntimeError if it is asked to analyse the queueing data but there are less than two intervals in that data.

While working on the EE509 assignments, I thought it might be useful to have a tool facilitating simpler reasoning about simulation results. A simple Jupyter notebook might do.

Extend the simulation core to be able to execute custom callbacks on every clock tick. The current use-case is to trace changes in simulation objects on every tick. It is like how the statistics collection is implemented, but I think it should be a different list of callbacks for generic use-case.

Add example scenario with RED admission policy. Preferably build a scenario with two simulations: one with the tail drop and the other with RED. This way the results could be easily compared.

Add capability of dumping a state object into a file on demand. Should be something that can be used as a callback.

Currently, PacketQueue supports only tail drop mechanism where arriving packets are dropped only if there is no space in the queue. In the Random Early Detection (RED) congestion avoidance scheme, arriving packets are dropped with a probably which increases with the current average queue length. Implementation will follow the description of the mechanism given in “Random Early Detection gateways for Congestion Avoidance,” IEEE/ACM Transactions on Networking, vol. 1, no. 4, August 1993. by S. Floyd and V. Jacobson.