IEEE Consumer Electronics Magazine - March/April 2023 - 68

Special Section on Security, Trust and Services for AI-Empowered Sensing in the Next Generation IoT
FIGURE 4. Multilayered SDN-based layered architecture in SIN.
which every component is implemented in the forwarding
devices and the forwarding plane is made
up of network equipment situated in all three
realms and data flow is simply transmitted.
Due to its changing network equipment, the
data in SDSINs are transmitted directly in the air,
which is highly vulnerable to various security
attacks launched by adversaries. The security
problem in SDSINs is relevant because once the
information was illegally accessible, severe consequences,
whether obtained, eavesdropped, or
disrupted, can endanger financial stability and
national security. However, due to several factors,
it is very hard to achieve a high level of
security. Therefore, it is obviously a nontrivial
job to design a safe and effective transmitting
mechanism for SDSINs.
Most versatile and programmable services,
including security policy, failure recovery, can
be supported by the application plane, by using
the entire network status information collected
from the SDN controller. In SDSINs, the control
of flexibility and transfer is more complicated
than in the single layer of space networks. Consequently,
to create effective flexibility and
68
transfer management, a mechanism for link consistency
provided by high-speed traveling LEO
space and satellites, we implement such a particular
service on the application plane. Logical
controllers spread across the three domains
function as administrative agents for the management
that is centralized because of their
respective network domains within the SDN controller.11
These controllers can also obtain and
perceive operation commands from the main
controller as multilayer interaction points and
then transmit control signals to SDN-enabled
devices. The main controller examines the entire
interconnected infrastructure and organizes
multilayer activities, such as the distribution of
data, balancing the load, and allocation of network
resources.
To perform the multilayer system flexibly, SDN
controllers acquire network state information on
a regular basis in each domain. To obtain optimumoperations
in their own domain, the data collected
is analyzed on the application plane. Then,
the evaluated results of the application will be
transformed into the commands for their freshness
of hardware configurations and transferred
IEEE Consumer Electronics Magazine

IEEE Consumer Electronics Magazine - March/April 2023

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