The Problem with C-RAN is Fronthaul

Southeast USA at night: All these urban areas will need a small cell backhaul solution for LTE at some point. Will it be "fronthaul?"

Southeast USA at night: All these urban areas will need a small cell backhaul solution for LTE at some point. Will it be “fronthaul?” Photo credit: NASA’s Marshall Space Flight Center / Foter.com / CC BY-NC

With the mobile telecommunications space facing an onslaught of data-hungry subscribers and their migration to LTE, operators have embarked on a quest to pack even more service in smaller and smaller service areas. The frontier of these smaller service areas have come to be characterized as small cells. The issue is getting communications into and out of these small service areas. Capacity, coverage and interference all need to be addressed. Some have proposed serving small cells via Centralized Radio Access Networks (C-RAN). To implement a C-RAN, one of the requirements is a newer concept that has come to be termed “fronthaul.”

In a June 2013 meeting of the Telecom Council, Aviat Networks’ chief technology officer, Paul Kennard, took on fronthaul and the challenges it presents for LTE, small cell and C-RAN. In his presentation, he weighed the advantages and obstacles of fronthaul. While the chief advantage of distributing Remote Radio Heads (RRH) around the cell can help alleviate coverage, capacity and interference concerns, it is not easy to reach these RRH locations with fiber in the mostly urban areas where this deployment scenario will be needed most. This is especially true of non-traditional implementation of small cells on light standards, signposts and other non-tower infrastructure collectively known as “street furniture.” Wireless backhaul solutions will continue to be necessary in the grand scheme of things.

More is available on fronthaul in the Telecom Council presentation below as is in an associated webinar.

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THE Mobile Marketplace: Towers, Small Cells and Backhaul

CTIA: The Wireless Association held its annual show in Las Vegas, May 21-23, 2013. Photo credit: @jbtaylor / Foter.com / CC BY

CTIA: The Wireless Association held its annual show in Las Vegas, May 21-23. Photo credit: @jbtaylor / Foter.com / CC BY

This week, Aviat Networks participated in the very well attended CTIA 2013 wireless and mobile trade show in Las Vegas. The theme for this year’s event was “THE Mobile Marketplace” with various areas of focus dealing with applications, devices and, of course, infrastructure. LTE, backhaul and small cells were once again important infrastructure-related topics during the event.

Aviat was a Platinum Sponsor of the Tower & Small Cell Summit—a sub-conference program composed of presentations, panels and case studies on wireless backhaul, mobile video, Distributed Antenna Systems (DAS), small cells, 4G and residential tower builds. I spoke on a panel at this event and shared our views on small cell evolution, including our thoughts on the migration of the mobile network to the Cloud Radio Access Network (C-RAN) architecture—if interested in this topic, please register for our upcoming webinars: North America or Europe, Middle East, Africa.

In addition, this show also paid significant attention to FirstNet—the nationwide public safety LTE network here in the United States. Aviat’s Ronil Prasad shared Aviat’s perspective on FirstNet, options for network sharing to reduce costs and best practices for building mission-critical backhaul networks for public safety LTE (with our 60-year history in public safety and our deployments in some of the largest LTE networks in the world, we are uniquely qualified to talk on this topic).

In addition, Aviat’s meeting facility experienced a constant flow of customers, industry analysts and partners, which kept Aviat staff on its toes for the entire event. Overall, it was a great show and Aviat was happy to participate to share our views on some of the most exciting new topics in mobile networks in the U.S.

Gary Croke
Director, Marketing and Communications
Aviat Networks

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