The mobile network is continuously evolving to fulfill subscribers’ requirements; however, there are still restrictions. In Chapter One, the authors propose a step-by-step revolution method and path for the mobile backhaul, backbone, core and service network adopting SDN, NFV and cloud technologies, this chapter is to cover the importance of TCPIP protocol stack and its design on future mobile network, beyond 4G, with emphasis on the TCP which is used for transfer of the most user data for the most used Internet services nowadays