Showing posts with label 3.5 GHz. Show all posts
Showing posts with label 3.5 GHz. Show all posts

Monday, February 27, 2017

Huawei and Softbank Complete 3.5 GHz Massive MIMO with CA Test

Huawei, in collaboration with SoftBank, completed a Massive MIMO verification test using the operator's 40 MHz spectrum on the 3.5 GHz band in Tokyo, Japan.

The test of Massive MIMO and multi-carrier technologies achieved a peak downlink rate of 1.4 Gbps.

Huawei said the 3.5 GHz band, with its abundant bandwidth resources, offers a great opportunity for the global development of LTE TDD, and has grown increasingly important as a 5G catalyst to assume the spotlight position of the global mobile industry.

Massive MIMO, featuring the incorporation of massive antennas and 3D beamforming, enhances spectrum multiplexing among multiple UEs to significantly improve spectral efficiency without additionally increasing site density or bandwidth. The 3.5 GHz Massive MIMO test further explores the latent potential of 3.5 GHz spectrum, and is expected to open up a new commercial era of LTE-Advanced.

Thursday, October 20, 2016

Momentum Builds for Citizens' Band LTE (3.5 GHz)

The Citizens Broadband Radio Service (CBRS) Alliance, which was formed in February 2016 with the goal of making LTE-based solutions in the 3.5 GHz CBRS band widely available, announced the addition of Accelleran, Airspan Networks, American Tower Corp., AT&T, Baicells, CableLabs, Ericsson, ExteNet Systems, Nsight, Ranzure Networks, Rise Broadband, and ZTE as members. Founding members of the alliance include Access Technologies (Alphabet), Federated Wireless, Intel, Nokia, Qualcomm and Ruckus Wireless (now part of Brocade).

“For LTE-based solutions in the shared CBRS band to be successful, we need a wide range of ecosystem partners, infrastructure, equipment and network providers, to work together closely,” said Michael Peeters, vice president Innovation Portfolio, Nokia and President of the CBRS Alliance. “We are thrilled to welcome all the new members to the CBRS Alliance and look forward to working together to provide solutions toward in-building and outdoor cellular coverage.”

“CBRS is creating opportunities to bring the benefits of LTE technology to a wider ecosystem,” said Neville Meijers, VP Business Development, Qualcomm Technologies Inc., and chairman of the board for the CBRS Alliance. “CBRS enables new kinds of deployments and business models, from LTE-based neutral hosts that can serve multiple service providers, to dedicated networks serving various entities such as enterprises or IoT verticals.”

  • In April 2015, the U.S. Federal Communications Commission (FCC) adopted rules for CBRS, which opens 150 MHz of spectrum (3550-3700 MHz) for commercial use — while providing necessary protection of incumbent users of the band. Spectrum access is actively coordinated based on priority and granular location, making previously allocated spectrum available to new entrants and services.

Monday, January 18, 2016

Blueprint: 2016 Predictions -- Big Guns and Long Tails

by Michael Murphy, CTO for North America, Nokia Networks

In 2014, I suggested that 2015 would be an inflection point due to the start of serious 5G activity and the start of cloud based deployments , which together had the potential to fundamentally change the telecom industry. So what really happened and what’s up for 2016?


5G did of course progress throughout the year, but perhaps the biggest news came in September. At the CTIA event, Verizon threw down the gauntlet (as did Nokia), and challenged the industry to deliver pre-standard solutions in 2017 just ahead of Korea’s 2018 Olympics and Japan’s 2020 Olympics. With that, we now have the big three (USA, Korea, Japan) having established lines in the sand. The 3GPP R13 meeting held in September also kicked off discussions on 5G with a preliminary view of timelines and study items, which was followed by the WRC15 meeting in November that looked at cmWave and mmWave candidates for WRC19. With those, we can say 5G work has started, formally.

And how about commercial cloud deployments?  It’s true they did start in 2015; however, this was typically for single network functions like new EPC or IMS installations. What’s coming in 2016 and 2017 will be more of the same, but with the result being multi-function cloud networks; and that’s really where the long sought after agility, OPEX and CAPEX gains will start to come. The reason is that clouds don’t really bring substantive change without scale. However, even with these early steps, the change to a horizontal purchasing model has started, where operators buy hardware, stacks, and VNFs, independently. That’s big.

Time will tell if these predicted inflection points will result in truly fundamental change going forward, but I do think so.


Looking forward into 2016, we can see these two big guns continuing, two new ones starting, and a few long tails. These will be very interesting developments indeed.

Regarding 5G, with 3GPP work started, and lines in the sand established, the race is now on to develop pre-standard systems that can be applied to limited use cases. Proof of Concept systems that exist today will evolve, mature, and begin early field trials in 2016. The challenges are immense. Chipsets, CPEs, antennas, wireless backhaul, frequency selection, propagation and penetration considerations, are just a small list of hurdles ahead. All of this will happen in parallel to standards being developed. It’s a race, and an ultra-marathon one at that.

Cloud computing will continue to progress towards the new normal by 2017, and there are parts that are predictable and parts that are still being defined. With the realization of increasingly dense, complex, and stringent transport requirements, there’s an invigorating discussion underway between several large operators and vendors on how to best use SDN, and employ strict control / user plane separation to both simplify and automate transport connectivity. We expect some large architectural changes to come out of those discussions, with baby steps showing up in 2016.

Are there any new big guns? Yes. The Internet of Things (IoT) is a wonderful buzzword that encapsulates more or less everything, and for that reason is hard to get a grip on at times. More practically though, in the wireless 3GPP world, it has come down to a single standard that is hotly debated, referred to as narrowband IoT, or NB-IoT, a 200KHz solution. It has LTE and clean slate alternatives being considered, with closure on the UL/DL selections expected at the next R13 RAN meeting in December. There is also a wider band LTE-M solution with a 1.4MHz carrier. Together, they could be loosely called high and low end solutions for cellular IoT. They will provide a foundation for the development of low cost chipsets that will enable the cellular industry to better compete with the dominant, lower cost, somewhat proprietary systems that exist today. It’s what many have been waiting for. That’s a big gun.

Finally, 3.5GHz. It’s hard to imagine how a frequency used by the U.S. Department of Defense could impact all of telecom, maybe forever - but it will. With the FCC’s announcement of the spectrum sharing rules for 3.5GHz, a paradigm has been set that may be applied to all future auctions. It’s a grand experiment with one of far reaching consequences. The associated WINN Forum also recently produced a technical report on the SAS to user (AP) interface. Combined, these set the stage for a new way of using spectrum that includes a general access option, permitting new operators to enter the telecom market in a cost effective way. In short, the 3.5GHz rules both change how spectrum is used and who can use it. It’s most certainly a big gun in the U.S., and one that could spill into other global regulatory regions. We expect products to start showing up in 2016.

So four big guns. And now for the long tails. In this case, I use the term to mean increments on top of larger bases, but this by no means implies they will be small or unprofitable, in fact, quite the opposite.

Virtual RAN is the first, and we refer to it as our Radio Cloud Architecture. As we virtualize the core, the obvious next step has always been to virtualize the radio access network. While more challenging due to real-time processing demands and latency constraints, it is doable and will happen. Through most of 2015, vendors investigated the best architectural solutions to implement practical virtual RAN solutions. For Nokia, that phase has completed and we are now firmly on a path of execution. Proof of Concept systems that have been around since 2014 will now evolve towards commercial systems in 2016. Note the timing. If we imagine that Radio Cloud systems start in 2016, and the first 5G systems shortly thereafter, would it not make sense to combine the two? Or putting it another way, will all 5G RANs be virtualized? Excellent question and one we are all actively considering.
As for other long tails, a couple of other technologies have silently been worked over the last couple of years that will start to see their pay days in 2016.

First, LTE-U (or LAA) and LWA, which are, put simply, the coupling of LTE and unlicensed spectrum to provide a better user experience. Also hotly debated due to perceived impacts to the Wi-Fi industry, products will come to fruition in 2016. The impact to users will be gains in terms of downlink throughput, and to operators the ability to take advantage of the large 2.4GHz and 5GHz free spectrum blocks. That in turn may be one tool of many to help support new data offers, like unlimited streaming of content that looks like it has just landed in the U.S. But we shouldn’t limit this long tail to just LTE coupling to Wi-Fi. Multiple Service Operators (MSOs) such as cable operators also have an interest in offering unlicensed voice and data solutions. With improvements in VoWi-Fi and authentication simplifications that come from HotSpot 2.0, MSO infringement into telecom territory will continue.

Secondly, how about those Small Cells? There’s been talk for years about adding tens of thousands of Small Cells to existing macro networks, but never really happened to the levels expected. That may be about to change in 2016. The reason is that products are getting better (with things like dual-band, Carrier Aggregation and LTE-U being the norm now), and more attention is being been put on the total solution. With a greater focus on permitting, wireless backhaul, different power levels, pole heights, and fiber and power access, once prohibitive cost levels are starting to drop. In addition, there’s a growing recognition that Small Cells are a highly effective and complementary part of one’s toolkit for designing networks from the start, and not only as an after-thought. It’s hard to say if we are at a global tipping point yet, but certainly, we envision a huge upswing in 2016 for both outdoor and indoor systems.

The Package

With four big guns and three long tails, 2016 will prove to be a very interesting time indeed for the industry, where new technologies will start to dominate the historically somewhat flat and predictable patterns of the past. Whenever there is change and disruption, there are winners and losers, on both the vendor and operator sides. With the mergers and acquisitions and partnering setups we’ve seen over the last few months, it’s clear that everyone is getting ready for the war by getting access to the right weapons. Who will win and who will lose may not be fully determined in 2016, but big guns and long tails are things to watch.

About the Author

Michael Murphy is CTO for North America, Nokia Networks. Prior to joining Nokia, Mike was the former head of WCDMA development for Nortel Networks. He has a master’s degree in Mathematics from the University of Waterloo in Canada. He has lived in Turkey, China, Korea, France, Canada, Japan, Thailand, and is now based in Irving, Texas.

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