[Ndn-interest] Issues in routing

Tanusree Chatterjee tnsr.chatterjee at gmail.com
Wed Nov 21 03:29:13 PST 2018

Thank you Yiannis for sharing the papers. It will be useful for me. If
anything doubtful, I wish to ask you then.
On Nov 21, 2018 4:16 PM, "Psaras, Ioannis" <i.psaras at ucl.ac.uk> wrote:

> Hi Tanusree,
> jumping a bit late into the discussion and adding to Klaus’s later
> comments: it’s highly unlikely that only one router will have a copy of
> some content in its CS. Content repositories will have more copies, but
> also given that a content is in a router’s CS, then this means that the
> content has already travelled in the network and hence, it will likely be
> in the CSs of other routers or end-users’ devices.
> This situation can be common in case of network fragmentation. I’m sending
> a coupe of pointers below to a few studies we’ve done and argued that
> Interests should not only look for content copies towards the main content
> repository (typically placed in the core of the network), but also towards
> the edge of the network. We have also calculated the time that content
> stays “live” in the fragmented part of the network, given some request
> distribution etc.
> Enhancing Information Resilience in Disruptive Information Centric
> Networks, IEEE TNSM 2018: https://ieeexplore.ieee.
> org/abstract/document/8306511
> Some extra bits and pieces can be found in two earlier conference versions
> largely in the same topic:
> Information Resilience through User-Assisted Caching in Disruptive
> Information Centric Networks, IFIP Networking 2015: http://dl.ifip.org/db/
> conf/networking/networking2015/1570063627.pdf
> Opportunistic Off-Path Content Discovery in Information Centric Networks,
> IEEE LANMAN 2016: https://www.ee.ucl.ac.uk/~uceeips/files/off-path-
> discovery-lanman16.pdf
> Hope this helps.
> Best regards,
> Yiannis.
>> https://www.ee.ucl.ac.uk/~ipsaras/
> On 19 Nov 2018, at 07:32, Tanusree Chatterjee <tnsr.chatterjee at gmail.com>
> wrote:
> Hello all,
> In NDN the routers are the busiest and most responsible entity in the
> network. So, if a router is down for some reason, what about the data it
> stores in its CS and the connections it hold? If the router is temporarily
> down, it can resume to its normal operations sometime later.  But if the
> router is permanently down and there are several data it produce and there
> are no more copies of all the data. Can there be any network administrator
> which can have the copies of the data of a router when it is down? If it is
> a high connectivity node, can network administrator can play a vital roll
> to take care the connections of the nodes?
> -- Thanks & Regards,
> Tanusree Chatterjee
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