[ndnSIM] Content Discovery

[Shahid Md. Asif Iqbal]

Thanks Spyridon,
Let me try solve the problem in your way. I will come back to you once I
got something new.

Asif

On Mon, Mar 28, 2016 at 10:10 AM, Spyridon (Spyros) Mastorakis <
mastorakis at cs.ucla.edu> wrote:

> Hi Asif,
>
> I do not see anything particularly wrong with sequencing and
> retransmissions, since the two different kinds of Interests have different
> names:
>
> You can assign sequence numbers independently to each different Interest
> category and also handle the Interest retransmission in a different way for
> each case if that is what you want.
>
> Moreover, there should be no way for you to update the PIT manually. This
> will take place based on the principles of the architecture/protocol.
> However, you can install different FIB entries and forwarding strategy for
> each Interest category to achieve the behavior that you mentioned. You
> could use the FIB helper:
>
> http://ndnsim.net/2.1/helpers.html#manually-routes-fib-helper
>
> and the strategy choice helper:
>
> http://ndnsim.net/2.1/helpers.html#forwarding-strategy
>
> Hope that this helps.
>
> Spyridon (Spyros) Mastorakis
> Personal Website: http://cs.ucla.edu/~mastorakis/
> Internet Research Laboratory
> Computer Science Department
> UCLA
>
> On Mar 25, 2016, at 10:14 PM, Shahid Md. Asif Iqbal <asifcsep at gmail.com>
> wrote:
>
> Dear Spyridon,
> Many thanks for both the options. Though, I mentioned about the first
> option in my last mail but later I did something that exactly matches with
> your second solution. It is worthy to mention that I pick this idea from
> one of your early solutions for me on some other topics. However, I am
> having problem with how to start the retransmission timer for an interest
> packet since each interest packet is sent twice now. To be exact, an
> interest packet(DISCOVER) for seq1 is first broadcasted to discover
> available producers or content routers having the the data for seq1. Once
> the available options are discovered then the interest packet (REQUEST) is
> unicasted to the best producer or router. Thus, I need
>
> (i) some advice on how can I manage the sequencing and retransmission
> timeouts in the consumer file
> (ii) how to update the fib/pit while the DISCOVER packet is coming back on
> the reverse path.
>
> Thanks in advance
>
> Asif
>
> On Fri, Mar 25, 2016 at 12:01 PM, Spyridon (Spyros) Mastorakis <
> mastorakis at cs.ucla.edu> wrote:
>
>> Just a follow-up on this one:
>>
>> Another way that probably would be simpler is to add your new fields to
>> the name of the Interest and Data packet as new name components. Then, you
>> can handle those components in your application using the API of the Name
>> class provided by the ndn-cxx library:
>>
>>
>> https://github.com/named-data-ndnSIM/ndn-cxx/blob/ndn-cxx-0.3.4-ndnSIM/src/name.hpp
>>
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/
>> Internet Research Laboratory
>> Computer Science Department
>> UCLA
>>
>>
>>
>>
>> On Mar 24, 2016, at 10:53 PM, Spyridon (Spyros) Mastorakis <
>> mastorakis at CS.UCLA.EDU <mastorakis at cs.ucla.edu>> wrote:
>>
>> Hi,
>>
>> some trivial changes off the top of my head are to add some get and set
>> methods for the new fields (and define the new fields as well). These
>> changes should be made here (and to the corresponding header files):
>>
>>
>> https://github.com/named-data-ndnSIM/ndn-cxx/blob/ndn-cxx-0.3.4-ndnSIM/src/interest.cpp
>>
>> https://github.com/named-data-ndnSIM/ndn-cxx/blob/ndn-cxx-0.3.4-ndnSIM/src/data.cpp
>>
>> You would also need to modify the wireEncode and wireDecode methods of
>> the Interest and Data class (files mentioned above) to encode and decode
>> the new fields to/from wire format.
>>
>> When you are done with these changes, you should be able to use the new
>> fields in your applications. You just need to get and set the fields in the
>> way that your approach works (e.g., when you express an Interest in your
>> consumer application set the new field of the interest packet, when you
>> receive an Interest in your producer application read the new field of this
>> packet and add the appropriate field to the data packet etc..).
>>
>> Please let me know if you need any additional information.
>>
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/
>> Internet Research Laboratory
>> Computer Science Department
>> UCLA
>>
>>
>> On Mar 19, 2016, at 9:49 PM, Shahid Md. Asif Iqbal <asifcsep at gmail.com>
>> wrote:
>>
>> Dear All,
>>
>> I would like to try an idea where the consumers first try to
>> discover the available content providers, then get the content
>> from one of the providers sending the actual request packets.
>>
>> Here is my thoughts:
>>
>> I have added one field to the interest packet to indicate the
>> type of the interest : discover or request
>>
>> I have added one field to the data packet to indicate the type
>>
>> of the data packet : content-offer or content-real
>>
>> content-offer is same as content-real except the content field is empty.
>>
>> Now, please help me to identify what other things do I need to do to make
>> my changes work especially in the consumer and producer files.
>>
>> Thanking in advance
>>
>>
>
>
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