Network Parameters on Subscriber side feelings

hi,

  is there any work or research on measuring method
for  subscriber (customer)side feelings of network
service? 

  It seems that e2e ping delay, packet loss may miss
some important factor when we consider subscriber's
feelings.


Joe


      
__________________________________ 
Yahoo! Movies - Search movie info and celeb profiles and
photos. 
http://sg.movies.yahoo.co
m/

>   is there any work or research on measuring method for
 
> subscriber (customer)side feelings of network service?

> 
>   It seems that e2e ping delay, packet loss may miss
some 
> important factor when we consider subscriber's
feelings.

Although zero packet loss is a sign of very low jitter, you
can't
generalize that if there is packet loss. Since jitter is
important to
VoIP and some media streaming, you might want to measure
that directly.
Of course, if your ping delay measurement is fine-grained
enough, then
you can calculate the jitter based on the difference between
the maximum
e2e ping delay and the minimum over a period of time.  It's
better if
the period of time is short enough so that you can learn
what your most
likely jitter vaues are, not just the worst case. 

--Michael Dillon

michael.dillonbt.com wrote:
>>   is there any work or research on measuring method
for  
>> subscriber (customer)side feelings of network
service? 
>>
>>   It seems that e2e ping delay, packet loss may
miss some 
>> important factor when we consider subscriber's
feelings.
>>     
>
> Although zero packet loss is a sign of very low jitter,
you can't
> generalize that if there is packet loss. Since jitter
is important to
> VoIP and some media streaming, you might want to
measure that directly.
> Of course, if your ping delay measurement is
fine-grained enough, then
> you can calculate the jitter based on the difference
between the maximum
> e2e ping delay and the minimum over a period of time. 
It's better if
> the period of time is short enough so that you can
learn what your most
> likely jitter vaues are, not just the worst case. 
>
> --Michael Dillon
>   
We have been doing a lot of work on how to measure the
subscriber
"experience" of a network. e2e ping delay actually
is quite a good
measure so long as you use it correctly. However we found
that using
tools such as iperf to take periodic measurments of TCP
throughput, UDP
throughput and packet loss was far more interesting.

--
Leigh Porter

On Mon, 18 Jun 2007 13:02:55 +0100
Leigh Porter <leigh.porterukbroadband.com> wrote:

> 
> michael.dillonbt.com wrote:
> >>   is there any work or research on measuring
method for  
> >> subscriber (customer)side feelings of network
service? 
> >>

<snip>

> >   
> We have been doing a lot of work on how to measure the
subscriber
> "experience" of a network. e2e ping delay
actually is quite a good
> measure so long as you use it correctly. However we
found that using
> tools such as iperf to take periodic measurments of TCP
throughput, UDP
> throughput and packet loss was far more interesting.
> 
> --
> Leigh Porter

You might also find this OWAMP (One Way Active Measurement
Protocol)
AKA "One Way Ping" implementation to be quite
useful for that sort of
thing.

http://e2epi.intern
et2.edu/owamp/

-- 

        "Sheep are slow and tasty, and therefore must
remain constantly
         alert."
                                   - Bruce Schneier,
"Beyond Fear"