ANALYTICS

Real-life deployment stories
SK Telecom
South Korea’s largest wireless carrier SK Telecom (SKT) is currently
being defined by the mental software of its chief technology officer Dr.
Alex Jinsung Choi, whose vision is for an all-IT telecoms
infrastructure.
All telecoms network functions will run on its cloud core in its software
defined data centre. When complete, all components in the core
networks in data centres and local network operation centres will be
running as virtualised network functions in an OpenStack cloud
infrastructure.
As a first step SKT is virtualising its traditional telecoms network
functions such as IP Multimedia Systems (IMS) and Evolved Packet
Core (EPC) so they can be ramped up in much greater volumes when
demand for, say, video services booms. These virtual network
functions (VNFs) will be used for providing customer-specific,
dedicated multi-tenant telecoms services with orchestrated service
chaining. The VNFs will also be used to boost service quality and
reliability with elastic VNF resource management and load balancing
control.
amount of capacity. If they could pay for just the capacity they
used, CSPs could save on licensing costs and avoid the
headaches associated with managing the various licensing
models.
The CSPs need an open ecosystem and the current scenario is
still too fragmented, says Monteleone. A more realistic approach
would focus on basic interoperability between entities from
different vendors, such as VNFs and MANO systems, in order to
orchestrate a wide catalogue of tools. You don’t have to
standardise everything right away. It might be better to regularly
consolidate on a continuous process of innovation and
experimentation.
“The initiatives taken around standardisation have helped
significantly to advance the NFV architecture definition and identify
NFV implementation and deployment challenges,” says Amol
Phadke, global network virtualisation and transformation lead at
Accenture.
Market activity so far has shown vendors and service providers
how to develop and deploy NFV. They should trust the evidence
of their own success, rather than the guidance of standards
committees, according to Phadke.
“The pace of progress with some of these initiatives has been
slow and has lagged real world deployments. The scope of some
of these standardisation activities has also been limited in that
they do not provide a complete NFV solution but rather only a
piece of the puzzle,” says Phadke.
Ultimately, NFV could be more successfully brought to market if
there was less obsessiveness about unifying every last aspect of it
and advancing all parties together, says Bell at OpenCloud. A
more lightweight and less encompassing approach, led by AT&T
in the OpenStack camp, would enable individual projects to
advance faster. These advanced parties, that progress on a
variety of fronts, could all be cross-referenced and catch up with
each other at intervals, as happens in the IT industry. As it is, the
pace of progress in the CSP sector is relatively slow.
SKT’s network research and development centre has already
succeeded in deploying parts of the operating IMS services as vIMS
in its commercial operation environment with OpenStack and is
currently operating them successfully. It also aims to commercialise
more parts of the IMS services to vIMS and put them into production.
The next target function for virtualisation is vEPC, says Choi.
Telefónica
The Spanish CSP group has invited Brocade, Intel and Red Hat into
its NFV Reference Lab Framework in order to test and develop virtual
network functions, as a means of upping its service orchestration for
its 313 million accesses across 24 countries.
Ease of use was the main benchmark in its tests. “In less than two
hours, we deployed the Brocade 5600 vRouter from a memory stick
and completed our performance tests in our NFV Reference Lab,”
says Francisco-Javier Ramón, head of Telefónica's NFV Reference
Lab. “These results are allowing us, as network operators, to
aggressively change our perspective regarding what is possible with
software-driven networking in order to accelerate the adoption and
deployment of these revolutionary technologies.”
AT&T
The U.S. CSP claims it is well on its way to implementing a common
infrastructure for all virtual network functions. By 2020, it plans to
virtualise and control more than 75% of its network using a new
software defined architecture to meet the growing demands of data
and video hungry users.
In the last eight years, data traffic on the AT&T network has increased
100,000%, driven primarily by video. As demand expands at this rate
the vertical scaling of traditional hardware models will be impossible,
no matter how sophisticated and complex the routers and switches
may be. Software definition of simple, standard hardware is the only
way to meet the growth in demand for performance and efficiency
while minimising costs.
Half of AT&T’s networks are controlled by open-source SDN code,
according to a statement by AT&T technology and operations vice
president John Donovan. Millions of AT&T wireless subscribers are
connected to virtualised network services with many relying on the
AT&T Integrated Cloud (AIC), which was built using OpenStack.
VANILLAPLUS MAGAZINE I SEPTEMBER / OCTOBER 2016
51