Page 168 - ITU-T Focus Group IMT-2020 Deliverables

3 ITU-T Focus Group IMT-2020 Deliverables

To support IMT-2020 network slicing, POF provides finer granularity on data plane programming. User can
create a packet processing pipeline customized for each slice with the minimum resource. POF allows smart
table memory and instruction memory sharing so that each slice has the lowest possible resource
consumption without performance loss.

The prototype of POF, built on NE40E platform, has been demonstrated in ONS2013. POF controller code and
a software switch are open sourced and available at http://www.poforwarding.org. POF south bound
interface is under consideration as the foundation of the next generation of OpenFlow in ONF.

References
[7.3-1] Akihiro Nakao, “Flare: Open deeply programmable network node architecture,”
http://netseminar.stanford.edu/seminars/10 18 12.pdf.
[7.3-2] Akihiro Nakao, "Software-defined data plane enhancing SDN and NFV."IEICE Transactions on
Communications 98.1 (2015): 12-19.

[7.3-3] Akihiro Nakao, Ping Du and Iwai Takamitsu, “Application Specific Slicing For MVNO Through
Software-Defined Data Plane Enhancing SDN”, IEICE Transactions E98-B, vol. 11, pp.2111-2120,
2015.
[7.3-4] Ping Du and Akihiro Nakao, "Application Specific Mobile Edge Computing through Network
Softwarization”, IEEE International Conference on Cloud Networking (CloudNet), 2016.
[7.3-5] Akihiro Nakao, Ping Du and Yoshiaki Kiriha et. al., “End-to-End Network Slicing in 5G Mobile
Networks”, Journal of Information Processing, IPSJ (to appear).

[7.3-6] Akihiro Nakao, Ping Du, et.al. “Introduction to FG IMT-2020 network softwarization work and
demo of softwarized LTE in FLARE network slices”, http://www.itu.int/en/ITU-T/Workshops-and-
Seminars/201612/Pages/Programme.aspx.
[7.3-7] Lagopus switch web site, http://www.lagopus.org/.

[7.3-8] Yoshihiro Nakajima, Hirokazu Takahashi, et.al. “Scalable, High-performance, Elastic Software
OpenFlow Switch in Userspace for Wide-area Network”,
https://www.usenix.org/sites/default/files/ons2014-poster-nakajima.pdf.

8 Horizontal extension of slicing

8.1 Capability exposure and APIs

Next generation network will accommodate a lot of various types of devices, which belong to different
industries. Therefore new diverse use cases will need to be supported by the network. The new uses cases
are expected to come with a high variety of requirements on the network. For example, there will be different
requirements on functionality such as charging, policy control, security, mobility etc. Some use cases such as
Mobile Broadband (MBB) may require e.g. application specific mobility and policy control while other use
cases can be handled with simpler mobility or policies. The use cases will also have huge differences in
performance requirements.
Capability exposure based on network softwarization enables the operator to create customised network
(e.g., a network slice) to provide optimized solutions for different market scenarios which have diverse
requirements, e.g. in the areas of functionality and performance.

The potential operational requirements are as follows:
• The IMT-2020 system shall be able to customize the network functions within a slice dynamically
based on the variation of the 3rd party (e.g., enterprises, service providers, contents providers, etc.)
demand.

• The IMT-2020 system shall also support dynamic utilization of resources (compute, network and
storage resources) within a slice as per the 3rd Application requirement, subject to operator policy.

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