  Given the indispensable need for a reliable network architecture to cope with
5G networks, 3GPP introduced a covet technology dubbed 5G Service Based
Architecture (5G-SBA). Meanwhile, Multi-access Edge Computing (MEC) combined
with SBA conveys a better experience to end-users by bringing application
hosting from centralized data centers down to the network edge, closer to
consumers and the data generated by applications. Both the 3GPP and the ETSI
proposals offered numerous benefits, particularly the ability to deliver highly
customizable services. Nevertheless, compared to large datacenters that
tolerate the hosting of standard virtualization technologies (Virtual Machines
(VMs) and servers), MEC nodes are characterized by lower computational
resources, thus the debut of lightweight micro-service based applications.
Motivated by the deficiency of current micro-services-based applications to
support users'mobility and assuming that all these issues are under the
umbrella of Service Function Chain (SFC) migrations, we aim to introduce,
explain and evaluate diverse SFC migration patterns. The obtained results
demonstrate that there is no clear vanquisher, but selecting the right SFC
migration pattern depends on users'motion, applications'requirements, and MEC
nodes'resources.
