[Ndn-interest] Interest Order Maintaining
Christos Papadopoulos
christos at cs.colostate.edu
Sat Feb 14 07:20:42 PST 2015
On 02/14/2015 06:35 AM, Nitinder Mohan wrote:
> Hi Junxiao,
>
> Wouldn't this hamper working of multimedia applications that require
> live streaming of data? If the interest for next chunk of data has to
> wait until the earlier chunk has arrived, wouldn't this slow down data
> transfer rate considerably?
Just like IP, you can build that functionality on top of the basic
interest/data exchange.
With IP you typically use a playout buffer to ensure smooth playback.
The same buffer is typically used for reassembly if your transport is UDP.
I suspect that a well-designed UDP/IP multimedia application that is
mindful of out-of-order delivery would not be hard to port to NDN.
Christos.
>
> Thanks and Regards
>
> Nitinder Mohan
> MTech (CE) IIIT Delhi
> http://home.iiitd.edu.in/~nitinder1369/
>
> On Sat, Feb 14, 2015 at 6:56 PM, Junxiao Shi
> <shijunxiao at email.arizona.edu <mailto:shijunxiao at email.arizona.edu>> wrote:
>
> Hi Nitinder
>
> NDN network does not guarantee in order delivery. An Interest could
> also be delivered to the producer multiple times.
>
> It's advised that apps are designed to not require in order delivery.
>
> If an app requires in order Interest delivery, one choice is to
> implement stop and wait: consumer sends the next Interest after
> previous ones are answered.
>
> Yours, Junxiao
>
> On Feb 14, 2015 3:50 AM, "Nitinder Mohan" <nitinder1369 at iiitd.ac.in
> <mailto:nitinder1369 at iiitd.ac.in>> wrote:
>
> Hello All!
>
> A curious question comes to my mind regarding routing strategy
> in NDN.
>
> Let us assume that there is one consumer and one producer in a
> network consisting of myriad of routers. If a consumer issues
> continuous interests for different data packets from the same
> producer, is it guaranteed that the Interest packets will arrive
> at producer in the same order as in which they were published?
>
> I understand that NDN follows multipath routing and later
> selects paths from its PIT entry according to performance of
> returning data. But wouldn't consecutive interests be sent on
> the same interface presuming there is no change in the network.
>
> Thanks and Regards
>
> Nitinder Mohan
> MTech (CE) IIIT Delhi
> http://home.iiitd.edu.in/~nitinder1369/
>
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