[Ndn-interest] Usefulness of routing protocol?

Dennis Olvany dennisolvany at gmail.com
Sun Jan 17 19:22:49 PST 2016


The NDN papers that I have read thus far seem to suggest that a router
receives an interest on a given face and then forwards the interest out of
its other faces. My impression is that this occurs at each router in the
network until the interest reaches the origin. As the data returns to the
client, all routers will learn the path based on the data incoming face.
Routers could then cease flooding once there is a known path. Clearly, my
understanding may be incorrect as I have only been researching NDN for a

On Sun, Jan 17, 2016 at 9:23 PM Syed Hassan Ahmed <s.h.ahmed at ieee.org>

> Dear Dennis,
> cc: Prof. Lixia Zhang and Dr. Alexander
> Somehow your question is valid, since we use Broadcasting interface in
> case of wireless, so eventually the Interest is flooded. For example, Every
> neighboring node  of consumer C1, overhears the Interest packet, and then
> has to perform all those basic operations, including PIT, CS, FIB search.
> Moreover, if there is a case when those neighbors of C1 are not in intra
> transmission range, may involve in interest forwarding as well. That
> creates kind of broadcast storm, given that if there is only one provider
> initially in the network. I have explored this problem in case of vehicular
> environments, when we tried to simulate CCN on top of 802.11p. For
> reference, please read my following paper:
> http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7145392
> P.S: If you find my paper useful, don't hesitate to cite it :)
> Kind Regards,
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> *Syed Hassan Ahmed*
> 사예드 하산 아흐메드
> PhD Research Scholar,
> MoNeT Wireless Lab, <http://monet.knu.ac.kr>
> Kyungpook National University,
> Daegu City, Republic of Korea.
> Cell: +82-10-9883-0786
> https://sites.google.com/site/shahmedknu/
> On Mon, Jan 18, 2016 at 4:50 AM, Lixia Zhang <lixia at cs.ucla.edu> wrote:
>> > On Jan 17, 2016, at 10:48 AM, Dennis Olvany <dennisolvany at gmail.com>
>> wrote:
>> >
>> > The flooding behavior of NDN is already akin to a routing protocol.
>> Clearly, there may be a benefit of knowing data reachability before
>> interest is expressed, but it is also not useful to know data reachability
>> if interest is never expressed. Is there a good use case for routing
>> protocol integration with NDN?
>> interesting questions.
>> let me ask a clarification question first: wonder exactly what you meant
>> by "The flooding behavior of NDN"?
>> Since NDN interest looks for data and not aims at any specific node, NDN
>> takes advantages of any communication media that is broadcast in nature
>> (e.g. WiFi) in that whoever hears the questions may answer.  But I dont
>> think NDN interests in general get flooded in wide areas.
>> Wonder exactly what you meant by "routing protocol integration with
>> NDN"?  The NDN testbed is running a routing protocol.
>> Lixia
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