[ndnSIM] Question about How to Modify Packet Format and Producer Processing for the Packet

[Lixia Zhang]

> On Sep 2, 2019, at 9:41 AM, Hiroya Okuma <okuma at stu.kobe-u.ac.jp> wrote:
> 
> Thank you for your reply.  
> 
> First, the network model consists of servers (providers), routers, and consumers. Servers and routers are wired, and routers and consumers are connected by Wi-Fi.  
> 
> Each node also caches regular files (A, B, C, etc.) and encoded files (A + B, A + B + C, etc.).  

1/ Let us be precise here: each node caches *data packets* (not files); a data packet may be carrying a segment of a file.

2/ for a data packets that carries a piece of network-encoded data: how is that data packet named?

> Therefore, if a consumer with files B and C requests file A, file A can be decrypted using its own cache file even if A + B or A + C is obtained.  
> Therefore, the consumer sends an Interest packet that contains three files name [A, A + B, A + C].
> In the scenario, the node (router or server) that received the Interest packet returns only one to the consumer if it has any of the three requested files.
> 
> If you have any other questions, please.
> 
> 2019/09/02 23:32、Lixia Zhang <lixia at cs.ucla.edu <mailto:lixia at cs.ucla.edu>>のメール:
> 
>> 
>>> On Sep 1, 2019, at 11:35 PM, 大熊 浩也 <okuma at stu.kobe-u.ac.jp <mailto:okuma at stu.kobe-u.ac.jp>> wrote:
>>> 
>>> Thank you for answering.
>>> I will ask you some more questions.
>>> 
>>> On 2019/09/02 14:59, Xinyu Ma wrote:
>>>> Hello, Ookuma san,
>>>>> On Sep 1, 2019, at 10:48 PM, 大熊 浩也 <okuma at stu.kobe-u.ac.jp <mailto:okuma at stu.kobe-u.ac.jp>> wrote:
>>>>> 
>>>>> Hello everyone.
>>>>> 
>>>>> I have some problems that I have to solve quickly.
>>>>> Could you give me some advice?
>>>>> (Let me apologize for my poor English and Technical capabilities)
>>>>> 
>>>>> ・How to Modify Interest Packet Format and Producer Processing for the Packet
>>>>> I am studying the combination of ICN and coding network.
>>>>> I'm thinking consumers send a single Interest packet that contains a request file name and file names that can be decrypted by using the contents of consumers own content store.
>>>>> (Since the producer will only return one of the requested files, it may be difficult for the producer to process if the consumer sends multiple Interest packets?)
>>>>> So I want to store multiple request packet names in Interest packets.
>>>>> 
>>>> I’m sorry I don’t quite understand this. If you want multiple files, why not just send out multiple packets?
>>>> I don’t think merging Interests is a good idea because it will make the Content Store useless.
>>> 
>>> Not requesting multiple files, I want to store several request file candidates in the Interest packet.
>>> Example) When a consumer who owns two files B and C and requests file A
>>> Interest packet ← "A", "A + B", "A + C" (Request file A can be decrypted if one of these files is obtained)
>>> 
>>> When sending multiple Interest files, if the producer returns all the requested files, will the consumer receive more files than necessary, causing congestion?
>> 
>> it seems that we need to step up a level to get a better understand of the scenario, before dive into the question of what kind of names one can put into an Interest packet.
>> 
>> So the first question to clarify is what kind of network coding is being tried here?
>> 
>> Lixia
>> 

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