I wrote an article on my load balancing research paper
Load Balanced Web Architecture
I have been looking at existing systems for CDNs, such as Akamai & CloudFlare; another avenue for researching has been the complete system or stack of large web sites, such as Wikimedia & Imgur; along with Internet Exchange Points (IXPs) & Internet Service Providers (ISPs), such as LINX, AT&T & BT.
The caching systems are of great interest to my load balancing research paper.
Another avenue for my research has been Cellular Service Providers (CSPs).
I have been spending a little bit of my spare time working out a few designs to put forward in my research paper.