https://secure.csse.uwa.edu.au/run/help3002?p=np&rss=y
help3002 - Network utilisation formulahelp3002 - Network utilisation formulahelp3002https://blogs.law.harvard.edu/tech/rssThe University of Western AustraliaMon, 13 Jul 2020 15:58:50 +0800Mon, 13 Jul 2020 15:58:50 +0800Re: Network utilisation formula
https://secure.csse.uwa.edu.au/run/help3002?p=np&a=746
https://secure.csse.uwa.edu.au/run/help3002?p=np&a=746Mon, 08 Jun 2020 16:23:54 +0800"Christopher McDonald" <chris.mcdonald@uwa.edu.au>ANONYMOUS wrote:
(well worded question; thank you).
If asked about slotted Aloha, they're effectively the same, as the nodes only transmit, or not, at
the beginning of each slot, and defer until the beginning of following slots.
For pure Aloha, the formula utilisation = S / G is more correct because it accounts for the
continuous, not discrete case, of nodes transmitting whenever they want to (including in the middle
of time slots).
Network utilisation formula
https://secure.csse.uwa.edu.au/run/help3002?p=np&a=739
https://secure.csse.uwa.edu.au/run/help3002?p=np&a=739Mon, 08 Jun 2020 10:05:24 +0800ANONYMOUSHi Chris,
I just wanted to clarify how Utilisation is calculated.
In SlottedAloha.c, the formula that was used was:
utilisation = numSuccessfulTransmissions / numTimeslots.
Where:
numSuccesfulTransmissions = total num successful transmissions over the entire timeslot
numTimeslot = total num timeslot
However, based on what I gather from the slides, Utilisation is calculated as:
utilisation = S / G
Where:
S = throughput or successful packets over a time period
G = offered load or total packets over a time period
There's a slight difference in how Utilisation is calculated in the C code and the
lecture slides. I think the C code version uses an estimate whereas the S/G equation is
more accurate.
If a question were to come up in the exam, should I use the S/G equation or the C code
equation?