Lecture 3 Flashcards
What is streaming vs elastic traffic? What are each most dependent on?
What are the key performance metrics for streaming and elastic traffic?
Streaming: Blocking probability
Elastic: Throughput/Transfer Times
Which of streaming or elastic traffic has bandwith sharing?
Elastic
What do balance equations look like? How are they set up?
rate of incoming = rate of outgoing
where both are a sum of the different rates that are incoming from these different states (which are written down as pi_i)
What is the GSM planning problem?
How does the GSM planning problem lead to the Erlang B model?
What is CSD vs. HC-CDS?
This is for mobile networking
What is different between the multi-rate models and the single rate models? (Name what is -aditionally- needed for this model)
For the multirate model we need the following data
How would a state space look like in the multirate model?
How should the balance equations be written for the multirate model?
What is the idea of the product form solution?
What is the scaleability problem for normalization (related to the product form solution)?
What is the Kaufman-Roberts recursion? What problem does it solve and how?
To what does bandwidth sharing behave like?
What is a PS model?
What is the M/M/1 PS model?
What is Little’s formula as defined in the slides?
What is a M/G/1 PS model?
In an M/M/1 model what does every character imply?
What is sojourn time?
Usually computed by a M/G/1 PS model
What is the slow down factor computed by a M/G/1 PS model?
