I am searching for the work that has been done so far on second layer of OSI model specially MAC. Please share/suggest me some useful research papers, if you have any idea.
MAC protocol research is a very vast subject of research in computer networks. The approaches adopted also differ from the type of networks being used. You can get a huge amount of material in net on MAC protocols. However, I am attaching herewith to good papers on Wireless Sensor Network MAC protocols which will help you in getting an idea of the different approaches in WSN MAC. Hope it helps. All the best for your research on MAC.