[Ndn-interest] Chunk level Data Retrieval in mobile NDN

[Lixia Zhang]

> On Feb 16, 2016, at 8:56 PM, Syed Hassan Ahmed <s.h.ahmed at ieee.org> wrote:
> 
> Hi everyone, 
> 
> I am writing to check the validity of my previous question, is it out of scope of this mailing list? or the question itself is invalid? 

apology for the delay in reply.

my personal answer to your question:

> What will happen to those 5 chunks cached in the memory of (n)? How they can be used? And if not, is there any scheme or mechanism defined in the current NDN to discard them? Or they will be discarded straight away?


1/ how the 5 chunks may be used: assume they are not private data, it is up to whether (n) receives interests for them from any other consumers as (n) moves along.

2/ regarding removing them from the cache: this is a cache management question.  NDN does not define a standard cache management scheme; individual nodes/routers can define their own cache management schemes based on their specific application and network environments (for example, a node in VANET can have big cache size, but connectivity may be intermittent, so its cache management may differ from that of a smartphone)

Lixia

> On Wed, Jan 27, 2016 at 4:02 PM, Syed Hassan Ahmed <s.h.ahmed at ieee.org <mailto:s.h.ahmed at ieee.org>> wrote:
> Hello Dear Colleagues and Seniors, 
> 
> I have a simple query regarding Chunk level retrieval in NDN enabled mobile networks such as VANETs, MANETs, etc. 
> 
> Let's consider one scenario: 
> 
> We have a consumer (C), looking for an Interest (i), and the current neighboring node (n) is not the provider of (i). In this case, the (n) will forward the (i) depending on any forwarding strategy. Now lets say, the very next hop to (n) is the provider (P) of (i) and the chunk level data retrieval starts in multi-hop fashion. However, after the successful delivery of few chunks (e.g. 5 out of 15 chunks), the (n) moves out between the (C) and (P), given that we have always caching on.
> 
> What will happen to those 5 chunks cached in the memory of (n)? How they can be used? And if not, is there any scheme or mechanism defined in the current NDN to discard them? Or they will be discarded straight away?
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