[ndnSIM] Regarding Forwarding Strategies Best Route and NCC

[Ahmed Sadek]

Hi Junxiao,

Thank you for your reply.

What routing metrics to use is an unsolved problem
<http://redmine.named-data.net/issues/2010>.
NDN testbed is using round-trip time (in milliseconds) measured by IP ping
as its routing metrics.

*So hop count is not used as a metric ?*

See CcndStrategy
<http://redmine.named-data.net/projects/nfd/wiki/CcndStrategy> for
information on NCC strategy.

*I read it before sending the question and didn't understand it, how NCC is
measuring delay on interfaces and selecting the lowest delay ? Is it
sending IP ping messages broadcast flood on each interface each few seconds
and ranking the interfaces based on this values ? and does it take prefix
into account or only interfaces ?*

Thanks!
Ahmed

On Thu, Jan 28, 2016 at 9:47 PM, Junxiao Shi <shijunxiao at email.arizona.edu>
wrote:

> Hi Ahmed
>
> What routing metrics to use is an unsolved problem
> <http://redmine.named-data.net/issues/2010>.
> NDN testbed is using round-trip time (in milliseconds) measured by IP ping
> as its routing metrics.
>
> See CcndStrategy
> <http://redmine.named-data.net/projects/nfd/wiki/CcndStrategy> for
> information on NCC strategy.
>
> Yours, Junxiao
>
> On Jan 28, 2016, at 9:00 AM, Ahmed Sadek <don1559 at gmail.com> wrote:
>
> Dear All,
>
> I am trying to understand better the two strategies of best route and NCC.
> My understanding is:
>
> BestRoute: This strategy relies on routing information and forwards
> Interests on the path with the lowest costs considering a specific metric.
> So I was wondering what routing metrics options we can consider for this
> strategy ?
>
> NCC: Interests are forwarded to the interface, that provides content with
> the lowest delay.
> So how is the delay is measured here on a low level for each interface?
> and is it measured for each prefix for each interface or only for each
> interface ?
>
> I really appreciate any explanation or if you point me to a link
> explaining it.
>
> Thanks !
>
> Ahmed Sadek
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> ndnSIM at lists.cs.ucla.edu
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>
>
>
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