  Recently, edge computing has emerged as a promising paradigm to support
mobile access in IoT multinetworks. However, coexistence of heterogeneous
wireless communication schemes brings about new challenges to the mobility
management and access control in such networks. To maintain its computing
continuum, Software-Defined Networking (SDN) architecture can be applied to the
distributed edge networks, which provides consistent frameworks for mobility
management and creates secure mechanisms for access control. In this paper, we
first review the state-of-the-art SDN technology and its applications in edge
computing. In particular, we highlight the prominent issues related to mobility
management and access control for SDN in the edge computing environment. We
also introduce a number of effective solutions to these issues by presenting
real-world testbed experiments, prototypes and numerical analysis of adopting
SDN based edge computing paradigms for IoT multinetworks.
