Network Operator Perspectives on NFV priorities for 5G

Tetsuya Nakamura
Principal Systems Architect, Network Technologies

Feb 21, 2017

Today, twenty-three network operators published a white paper to guide the industry on priorities for NFV to deliver the industry vision for 5G systems: "Network Operator Perspectives on NFV priorities for 5G". The network operator co-authors include Bell Canada, BT, CableLabs, CenturyLink, China Mobile, China Unicom, Colt, Deutsche Telekom, KDDI, KT, NTT, NTT DOCOMO, Orange, Portugal Telecom, Rogers, SK Telecom, Sprint, STC, Swisscom, Telecom Italia, Telefonica, Telenor, and Vodafone. As managing editor for this white paper, I worked closely with colleagues from these leading organizations to document some key consensus requirements that we want the 5G standards community to take into account in their upcoming specification work.

We believe the evolved 5G network will be characterized by agile resilient converged fixed/mobile networks based on NFV and SDN technologies and capable of supporting network functions and applications encompassing many different networks and services domains. The breadth of foreseen 5G use cases and environments implies high scalability, ultra-low latency and ability to support a massive number of concurrent sessions, as well as ultra-high reliability and security. To achieve these ambitious goals, Network Slicing, Cloud-native design principles, End-to-end Service Management, Edge Computing, RAN Cloudification, Multi-site/domain Services, NFV License Management, Security, Reliability, and Scalability are important enablers as outlined in some detail in this paper.

In an era of increasingly stretched resources, it is vitally important for standards development organizations and open source communities to avoid re-invention and wasteful duplication of effort. Hence, an important message is to encourage reference to the extensive body of foundational NFV specification work already published by the ETSI NFV Industry Specification Group over the past four years as the basis for 5G.

As managing editor, I believe this white paper should be used as guidance for the wider industry on how NFV should be used to realize 5G use cases.

What is CableLabs Doing in this Space?

The cable network will provide an ideal foundation for 5G because it is ubiquitous and already supports millions of Wi-Fi nodes in places where the majority of wireless data is consumed. It has high capacity for both Access and Backhaul. It is highly reliable and has low intrinsic latency because it is based on optical fiber which penetrates deep into the access network feeding wideband coaxial cables reaching all the way to the end-user premises. Moreover, it is a multi-node remotely powered access topology ideally suited to support the connection of the large number of small cells close to homes and businesses that will be needed for 5G.

A multi-faceted CableLabs R&D program is addressing the key technologies required for 5G around NFV and SDN that we are executing on behalf of our cable operator stakeholders. For example, CableLabs is progressing an intensive study of virtualized provisioning of the cable access network to enable programmability, our NFV/SDN reference platform is based on OPNFV and we are looking ahead to support 5G using an end-to-end virtualized architecture that includes low latency edge compute nodes located at the cable head-end. In addition, we are seeking to accelerate NFV/SDN interoperability through CableLabs’ Kyrio subsidiary which has built an interoperability lab where vendors can work together with operators to toward their NFV and SDN solutions.

By Tetsuya Nakamura, Principal Architect, Strategy & Innovation, CableLabs



FCC Votes to Expand Wireless Spectrum: A Win for Wi-Fi

Rob Alderfer
VP, Technology Policy

Mar 31, 2014

Today is a big day for Wi-Fi and everyone that uses it – which is, of course, all of us. Our Wi-Fi is about to get twice as good. How? By doubling the size of the Wi-Fi pipe.

The FCC voted today to double the amount of wireless spectrum that Wi-Fi uses in the 5 gigahertz (GHz) band. That’s 100 megahertz (MHz) of newly useful Wi-Fi bandwidth.

You might have heard of 5 GHz – it's the globally harmonized home for the latest Wi-Fi technology: 802.11ac, also known as “gigabit Wi-Fi” for its incredibly fast broadband speed. 802.11ac is beginning to hit the market in force – the MotoX and latest Samsung Galaxy smartphones, among many other devices, have it already. Pretty soon, 802.11ac will be in just about everything.

The only problem with gigabit Wi-Fi is that regulations prevented it from reaching its full gigabit potential.

Until today.

It has taken a lot of work by many dedicated people to get to this moment. A little over a year ago, the FCC proposed a number of ways to increase Wi-Fi bandwidth. Additional spectrum is needed to support the continued growth of wireless broadband, which we have written about, and is a central feature of the Administration’s technology policy and the National Broadband Plan.

[Related: CableLabs' Work on Wireless Spectrum]

A strong desire to make progress in wireless policy is not enough, however. Success requires attention to detail. In the context of 5 GHz, that means understanding how Wi-Fi can share the airwaves with the other wireless services that use the same spectrum.

That’s where CableLabs comes in. In collaboration with colleagues at the University of Colorado, we developed a sophisticated simulation of potential interference between Wi-Fi and a satellite phone system that uses part of the 5 gigahertz band. This analysis served as the technology framework for today’s FCC action.

“The FCC vote to expand Wi-Fi access in the 5 GHz band is a great step forward for wireless broadband,” said Phil McKinney, president and chief executive officer of CableLabs. “This action substantially increases  Wi-Fi capacity, making gigabit Wi-Fi speeds possible. CableLabs’ insights on spectrum sharing, including sophisticated simulation of how Wi-Fi will interact with other services using the same spectrum, played a key role in helping the FCC move forward.”

Cable operators will put this new bandwidth to good use, along with the rest of the Wi-Fi community. But to be clear, today’s win for Wi-Fi is just the beginning. Regulators in other nations should take note and consider how to fully enable the global gigabit Wi-Fi standard. And the FCC has more work to do as well: Today’s newfound 100 MHz of Wi-Fi bandwidth, while significant, is only 20% of the national goal for new wireless broadband spectrum.

What’s next, then? A framework for spectrum sharing between Wi-Fi and nascent connected vehicle technology would be a good place to start.

To be continued …

Rob Alderfer is a Principal Strategic Analyst for CableLabs, the global research and development consortium of the cable industry, where he guides technology policy and strategy across the industry. He was the Chief Data Officer of the Wireless Telecommunications Bureau at the Federal Communications Commission from 2010 to 2012, leading data-driven wireless policy to encourage investment and innovation in wireless broadband. Previously, he was responsible for overseeing communications policy and programs on behalf of the Administration at the White House Office of Management and Budget.