Page 137 - ITU-T Focus Group IMT-2020 Deliverables

ITU-T Focus Group IMT-2020 Deliverables 3

6.4.4.4 5G SONATA components and PoC

A recursive structure can be defined as a design, rule or procedure that is (partially) explained using a
simplified version of itself. In a network service context, this recursive structure can either be a specific part
of a network service or a repeated part of the deployment platform. Although different challenges can be
thought of, the general idea of reusing existing patterns could reduce complexity and even add more flexible
possibilities for extending the service. In Figure 3 recursive orchestration is shown as an SONATA service
platform delegating the requested service to another instance of a SONATA platform using a dedicated
infrastructure adaptor.
Reclusiveness also leads to an easier management of scalability. Monolithic software entities are prone to
performance limitations from a certain workload onwards. Scaling by delegating parts of the service to
multiple instances of the same software block is a natural way to handle more complex and larger workloads
or service graphs. If this reclusiveness is taken into account from the beginning of the development, the
advantages of this approach will come at a minimal cost.

Figure 6.4.4-3 – Service Deployment using the SONATA framework
SONATA Service platform and SDK as open solutions are available for download at [Ref.6.4.4-1].

References

[6.4.4-1] “SONATA project website,” http://sonata-nfv.eu/.
[6.4.4-2] H. Karl, S. Dräxler, M. Peuster, A. Galis, M. Bredel, A. Ramos, J. Martrat, M. S. Siddiqui, S. van
Rossem, W. Tavernier, G. Xilouris “Development and Operations (DevOps) for Network
Function Virtualization” - Wiley Transactions on Emerging Telecommunications Technologies;
– August 2016 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2161-3915.
[6.4.4-3] “Views on 5G Architecture” A. Galis et all - white paper 5G PPP Association July 2016
https://5g-ppp.eu/wp-content/uploads/2014/02/5G-PPP-5G-Architecture-WP-July-2016.pdf.

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