Software Defined Networking (SDN) and Network Function Virtualization (NFV) have emerged as critical technologies for an efficient and flexible design of communication networks. These technologies have become the vehicles for ever increasing "Softwarization of Mobile Networks". Softwarization of Mobile Networks: Technologies, Protocols and Applications explains how these technologies are being incorporated into the basic architectural frameworks of emerging mobile networks, leading to a significant transformation of the network architecture and communication protocols.The book discusses the latest research trends in this field and explains how the usage of SDN & NFV in Mobile Networks enables new services and features such as Network Slicing, Multiple Radio Access, Broadband-Broadcast Convergence, Efficient Content Delivery and also brings efficiency to some of the existing ones: Mobility Management, Load Balancing, Interference Management, Dual Connectivity and others.The book also elaborates on the relevant protocols and architectural aspects of the mobile networks, especially Fifth Generation (5G) Mobile Networks, which is currently under development in various Standard Development Organizations, such as, 3GPP, IEEE, ITU.