have good performance with large and highly mobility
networks. A good amount of such routing protocols
have been developed for vehicular ad hoc networks
(VANETs), which exhibit similar characteristics as
some UAV applications.
Connection to the backbone infrastructure networks:
Appropriate mapping of networking parameters between
the U2U routing protocol and the networking
protocol used in the infrastructure network is important
and must be considered.
Transmission robustness and security: These are also
important factors to consider depending on the application
that is being used. Several secure routing protocols
have been proposed in the literature.
Collocated networking protocols: In environments
where other networked devices are used, it important
to guard against interference when such devices and
associated networking protocols use the same frequency
range.
License-free operation: This is an issue that needs to
be considered when choosing the appropriate protocols
since some operating frequency ranges require
the acquisition of proper licensing in some areas or
geographic regions.