[ndnSIM] ndnSIM Digest, Vol 38, Issue 22

Fri Jan 29 21:51:30 PST 2016

Dear All,
How can I add a new field to the interest packet and update subsequently
this field as the interest crosses the hops in network? And, how can I find
the number of hops traversed by an interest packet?

On Sat, Jan 30, 2016 at 1:36 AM, <ndnsim-request at lists.cs.ucla.edu> wrote:

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> Today's Topics:
>
>    1. Re: Regarding Forwarding Strategies Best Route and NCC
>       (Spyridon (Spyros) Mastorakis)
>    2. how to write (serialize) something in interest/data (Carl Zu)
>    3. Re: Regarding Forwarding Strategies Best Route and NCC
>       (Ahmed Sadek)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 29 Jan 2016 09:11:17 -0800
> From: "Spyridon (Spyros) Mastorakis" <mastorakis at CS.UCLA.EDU>
> To: Ahmed Sadek <don1559 at gmail.com>
> Cc: Junxiao Shi <shijunxiao at email.arizona.edu>, ndnsim
>         <ndnsim at lists.cs.ucla.edu>
> Subject: Re: [ndnSIM] Regarding Forwarding Strategies Best Route and
>         NCC
> Message-ID: <27CE63C8-6ECC-433A-9E64-1108CC3D145F at cs.ucla.edu>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Ahmed,
>
> it would be a good idea to take a look at the NFD developer?s guide as
> well. There is a section describing each strategy:
>
>
> http://named-data.net/wp-content/uploads/2015/10/ndn-0021-5-nfd-developer-guide.pdf
> <
> http://named-data.net/wp-content/uploads/2015/10/ndn-0021-5-nfd-developer-guide.pdf
> >
>
> Hope that this helps.
>
> Spyridon (Spyros) Mastorakis
> Personal Website: http://cs.ucla.edu/~mastorakis/ <
> http://cs.ucla.edu/~mastorakis/>
> Internet Research Laboratory
> Computer Science Department
> UCLA
>
>
>
>
> > On Jan 29, 2016, at 1:39 AM, Ahmed Sadek <don1559 at gmail.com> wrote:
> >
> > 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 <mailto: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 <mailto:
> 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
> >> _______________________________________________
> >> ndnSIM mailing list
> >> ndnSIM at lists.cs.ucla.edu <mailto:ndnSIM at lists.cs.ucla.edu>
> >> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim <
> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim>
> >
> >
> > _______________________________________________
> > ndnSIM mailing list
> > ndnSIM at lists.cs.ucla.edu
> > http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>
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> ------------------------------
>
> Message: 2
> Date: Fri, 29 Jan 2016 20:34:09 +0100
> From: Carl Zu <carlzu8 at gmail.com>
> To: ndnSIM at lists.cs.ucla.edu
> Subject: [ndnSIM] how to write (serialize) something in interest/data
> Message-ID:
>         <
> CAFxAFZUgHMbaVFy2Hvf0wf-kqKK5V22TOjSyamZEo8ay9Fo8pQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Dear all,
>
> In ns-3, we could serialize something in packet header or tag. How we can
> do this in ndnSIM, i.e., writing something in interest messages/data
> objects ?
>
> I know that in ns-3 we were using ns3::Packet, while here we use a TLV NDN
> packet.
>
> Thanks in advance for your guidance.
> C
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> ------------------------------
>
> Message: 3
> Date: Fri, 29 Jan 2016 20:36:13 +0100
> From: Ahmed Sadek <don1559 at gmail.com>
> To: "Spyridon (Spyros) Mastorakis" <mastorakis at CS.UCLA.EDU>
> Cc: Junxiao Shi <shijunxiao at email.arizona.edu>, ndnsim
>         <ndnsim at lists.cs.ucla.edu>
> Subject: Re: [ndnSIM] Regarding Forwarding Strategies Best Route and
>         NCC
> Message-ID:
>         <
> CA+Wzd2DW3mjpJfZMnxPNkhZcZxWCvBYVRsrq7yc4dSqzFqDY2A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Spyros,
>
> Thank you for your reply. Honestly, I have checked the developer guide
> before asking and this is what I found on NSS Strategy:
> 6.2.4 NCC Strategy The NCC strategy 8 is an reimplementation of CCNx 0.7.2
> default strategy [16]. It has similar algorithm but is not guaranteed to be
> equivalent. This strategy is implemented as nfd::NccStrategy class.
>
> And the citation lead to the same website provided above  , which I have
> check and didn't understand how it measures delay for each interface.
>
> Now I am checking the code here "
>
> https://github.com/0xbb/amus-ndnSIM/blob/master/NFD/daemon/fw/ncc-strategy.cpp
> "
>
> If anyone can give few words explaining this strategy, I would be thankful.
>
> Thanks!
> Ahmed
>
> On Fri, Jan 29, 2016 at 6:11 PM, Spyridon (Spyros) Mastorakis <
> mastorakis at cs.ucla.edu> wrote:
>
> > Hi Ahmed,
> >
> > it would be a good idea to take a look at the NFD developer?s guide as
> > well. There is a section describing each strategy:
> >
> >
> >
> http://named-data.net/wp-content/uploads/2015/10/ndn-0021-5-nfd-developer-guide.pdf
> >
> > Hope that this helps.
> >
> > Spyridon (Spyros) Mastorakis
> > Personal Website: http://cs.ucla.edu/~mastorakis/
> > Internet Research Laboratory
> > Computer Science Department
> > UCLA
> >
> >
> >
> >
> > On Jan 29, 2016, at 1:39 AM, Ahmed Sadek <don1559 at gmail.com> wrote:
> >
> > 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
> >> _______________________________________________
> >> ndnSIM mailing list
> >> ndnSIM at lists.cs.ucla.edu
> >> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
> >>
> >>
> >>
> > _______________________________________________
> > ndnSIM mailing list
> > ndnSIM at lists.cs.ucla.edu
> > http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
> >
> >
> >
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> End of ndnSIM Digest, Vol 38, Issue 22
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