[ee122] HW1: 2b clarification
simtan at berkeley.edu
Tue Sep 18 21:17:23 PDT 2007
I was under the impression that a 'one-way delay' included transmission
delay (as well as processing, queuing, and propagating delays) in one
compact, convenient number for our calculations. At least, that is the
definition I find by searching and asking around.
If the '40 ms' that was referenced only applies to RTT (which, I also
presumed, was round-trip time, the sum of two one-way delays and
neglecting the factor of 'response time'), then I would have to calculate
some other number to multiply by my number of packets, wouldn't I?
What of part (c) of the question - it is using RTT again, so do we go back
to basing the answer on '40ms'?
Thanks for any clarification of "one-way delay", "RTT", and "time to
transmit" you can provide.
On Tue, 18 Sep 2007 07:41:24 -0700, Jorge Ortiz <jortiz at cs.berkeley.edu>
> Just apply it to the RTT.
> On 9/18/07, Merry Choi <merry_c at berkeley.edu> wrote:
>> Some further clarification about the definition of 40ms delay.
>> Does this mean, say if, a packet could theoretically be sent in 15ms in
>> given bandwidth, it would take 40ms for it to actually send? Or rather,
>> delay is only applicable to the calculation for the RTT.
>> -----Original Message-----
>> From: ee122-bounces at ICSI.Berkeley.EDU
>> [mailto:ee122-bounces at ICSI.Berkeley.EDU] On Behalf Of Jorge Ortiz
>> Sent: Monday, September 17, 2007 8:04 AM
>> To: sylvainla at berkeley.edu
>> Cc: ee122 at ICSI.Berkeley.EDU
>> Subject: Re: [ee122] HW1: 2b clarification
>> On 9/17/07, Sylvain La <sylvainla at berkeley.edu> wrote:
>> > In Homework 2, part b, the question states that we wait an RTT after
>> > transmitting a packet. Does this mean we wait the RTT (about 80 ms)
>> > immediately after sending out the last bit of a packet, or do we wait
>> > a packet is received on the other end before waiting an RTT (about
>> 120 ms)
>> After you're done acually
>> If you start counting your wait time after you have received an
>> acknowledgement, how long have do you actually wait?
>> > -Sylvain
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~Simon Tan >> undergraduate at UC Berkeley
Source: simtan at berkeley.edu
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