I have a general information on this topic. what is your problem or question? In which part you need help ?

i want to know about effective content dissemination using p2p network and also how can we implement network coding in p2p network for content distribution.

thanking you

It is better to konw a little about the anatomy of p2p network, found in this paper :

http://iptps06.cs.ucsb.edu/papers/Gkant-netcode.pdf

next you can find some useful info in these papers:

http://web.engr.oregonstate.edu/~thinhq/papers/conference/msan05.pdf

http://itec.hust.edu.cn/study/CCN/Toward%2520Energy-Efficient.pdf

http://link.springer.com/chapter/10.1007%2F978-3-540-79549-0_36

and some info on coding on these papers:

http://msr-waypoint.com/pubs/69452/imc06.pdf

http://iqua.ece.toronto.edu/spotlights/network-coding-for-content-distribution/

Hope it helps you.