Today
everyone is having one or more personal gadgets like mobile, laptops, tablets
and other digital devices. Each of those can be connected together to form a
network. But there are certain conditions or places where the network
connectivity is not good or available all the time. In such case, there is a
continuous study on DTN (Delay Tolerant Networking).
What is DTN?
It
is a method of a computer network architecture used to solve the issues in
connecting or technical issues in heterogeneous networks that has not
continuous network connectivity.
Disruption may occur due to fault in sparsity
of mobile nodes, wireless radio range, attack, noise, and energy resources. It
is important for the people those who are communicating with each other
specially planned networks in space, extreme terrestrial environments etc.
Combination of Content and Contact Based Methods:
Content
and Contact based methods need to be used as combined because in only contact
based technique there are departments of nodes under a community. It is a fact
that under this process there are inter-community searches.
Since the
communities are not having the content information. A community needs complete
information about the content indexes of all other communities otherwise the
process will go inefficient and costlier.
Actual Process:
The
content or contact based file searching is actually an algorithm. It works on the
property of social network. Each and every node has a system with its own
interest list. Whenever a file has been searched from any node it has been
passed on to another node if the file is not available there.
Now another node
can check in its system about the requested file, if it is not the file holder
then it checks whether it is located in its destination community. If it is
then it initiates the intra-community search. If the file has been found then
it has been forwarded to the requested node.
In case the current node is not
the destination community then it performs inter-community searching. After
detecting the right community where the file has been located, the request has
been passed to the destination community and finally, the intra-community
search has been activated to find the right node there.
It is very necessary
for every community to have the proper introduction that may result in saving
energy during searching. In order to make it quick each request has a specific
TTL or Time To Live, if the file has not been searched within that time the
request has been expired and the process ends.
Conclusion:
This
method can definitely help in enhancing the efficiency of a search through
social media networks. Each and every node’s content is important and does
matters a lot in the proper searching of a file. Even the moment pattern of nodes can help
predict the right search results about a requested file.
It is based on a
virtual communication among the nodes having content of common interest as a
community. A file request can be passed from one to another with a higher
possibility of common content or interest. This method has been tested with
others on NS-2 simulator and real-world GENI testbed both community and
real-trace based mobility models and found very helpful.
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