handover in heterogeneous wireless network

My project is "IP based handover in heterogeneous wireless network" and i have just started with wireless. Is there anybody share with me some advice ?. And some good book (titles), please!.Thanks

I too have been looking for some information on the same topic for over 2 months. But I need to simulate it. For you, loads of papers can be found on ieeeexplorer. Some recents books using "heterogeneous wireless network" can be found on ebookee.com