[Ndn-interest] Data comes from another face?

Muhammad Hosain Abdollahi Sabet M.AbdollahiSabet at mail.sbu.ac.ir
Sun May 31 11:21:37 PDT 2015


So in wired nets it would be good old BUS or ethernet HUB networks, which is rare these days unless we face lack of switching devices. And in wireless nets, generally all of them are multiple-access link, right?

Actually It'very good to see you here by chance. Lately I've been thinking on intelligent(self-learning) forwarding and I was counting different situations which it would be useful for. Just a couple of hours ago I saw your presentation about NDN in LANs at NDNComm and I was like :| "Again, I've got here late!", though I had felt the need for such a self-learning mechanism in producer mobility. I don't know if still there is a room to contribute more in this. As far as I already saw, this NFD in addition to a pointer to the chosen output face in PIT, which is available right now, lacks some pointer to the chosen FIB entry itself. And of course some measures are needed to check efficiency of self-learned chosen faces after a while and see if another flooding is needed for choosing possible better face.


-----Original Message-----
From: Junxiao Shi [mailto:shijunxiao at email.arizona.edu]
Sent: Sun 5/24/2015 1:48 AM
To: Muhammad Hosain Abdollahi Sabet
Cc: ndn-interest at lists.cs.ucla.edu
Subject: Re: [Ndn-interest] Data comes from another face?
Hi Sabet

As I understand you question is:
In a network of NDN nodes where none of the nodes is using broadcast
strategy, if a node has not forwarded an Interest out of an interface, is
it possible for this node to receive a Data on this interface?

The answer is YES.
Think about a multi-access link with 3 hosts P Q R.

   1. Q sends an Interest. P and R receive this Interest,
   2. P replies with a Data. Q and R receive this Data.

In this scenario, R has not forwarded an Interest to the multi-access link,
but receives a Data from the multi-access link.

Yours, Junxiao

On Wed, May 20, 2015 at 11:17 AM, Muhammad Hosain Abdollahi Sabet <
M.AbdollahiSabet at mail.sbu.ac.ir> wrote:

>  Hi,
> We all know that data packets follow breadcrumbs which interest packets
> leave behind. And we expect to receive data packets from the same face
> which interests have already been forwarded to, according to correspondent
> fib entries, right? So, when the second sentence won't happen? I mean a
> node receive a data packet matching a pit entry, from a face that the
> interest has not been forwarded to, according to the fib entry. If a node
> choose to broadcast for forwarding strategy, such a situation happens. I
> know that. But is there any other condition?
> Thanks,
> Sabet

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