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An SDN-IoT-based Framework for Future Smart Cities: Addressing Perspective
In this Chapter, a software-defined network (SDN)-based framework for future
smart cities has been proposed and discussed. It also comprises a distributed
addressing scheme to facilitate the allocation of addresses to devices in the
smart city dynamically. The framework is dynamic and modules can be added and
omitted by a centralized controlling unit without disturbing the other
components of the framework and other modules may be updated accordingly. In
the proposed addressing scheme, a new Internet of Things (IoT) device will
receive an IP address from one of their existing neighboring peer devices. This
allows devices in the city to act as a proxy and generate a set of unique IP
addresses from their own IP addresses, which can then be assigned to new
(joining) devices; hence, reducing addressing overhead and latency, as well as
avoiding the need to send broadcast messages during the address allocation
process. Thus, it achieves considerable bandwidth and energy savings for the
IoT devices