FEATURE SPONSOR’S Q&A
Networking opportunity
Networks, talks about novel business models, terminal delays, spectrum issues and small cells in the LTE environment.
Tommi Uitto, head of LTE business line for Nokia Siemens Q: LTE: 4G or not 4G?
A: That’s a good one. If you look back a little, technically the correct term, and the consen- sus in the industry, was that what we today call 4G was actually 3.9G. But it didn’t take long before the Wimax camp started calling their technology 4G and that led some of the first operators in the LTE space to call their networks 4G as well. I think Telia was among the first ones to go for 4G. Our view is that we’re not picky about the name. It is what it is, and just about everyone in the industry now talks about 4G instead of 3.9—us included. Anyway, whatever it’s called it’s now going
global. There are four early 4G markets in the world; Japan, the US, Korea and the Nordics. You could also count Germany, because of the 800MHz digital dividend rollout.
Q: Does that German deployment pave the way for more carriers to use LTE to target the domestic broadband market?
A: It certainly seems better to deploy mobile broadband rather than putting fibre to every last cottage in the countryside. And we are in discussions with some non-traditional operators who are planning to use LTE as an alternative to ADSL, and provide wireless, residential broadband access in markets where ADSL either doesn’t exist or where the service is bad.
Q: There is a lot of talk around small cell archi- tectures in LTE. Will the technology kickstart the small cell market?
A: Based on the discussions we’re having with our customers, there is definitely more inter- est around micro and femto than ever before. In WCDMA interest was fairly limited, and
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seems to be a law of nature in this business. From the time when a 3GPP standard baseline has been approved, it typically takes about 18 months before you see the first devices available in volumes that are compliant with that release baseline. That law of nature has been repeating in LTE.
Q: Could the range of spectrum bands proposed for LTE pose a problem for handset vendors that they didn’t face with 2.5G or 3G, though?
only a handful of operators have rolled out a large number of femtocells. Now it seems to be related to a different device paradigm and traffic profile. So if operators have high frequencies, anything over 2GHz or slightly below, it will be difficult for them to build good coverage indoors with standard network architectures. And if you have applications that need to be always on, requiring good continuous coverage, then you need indoor solutions, including enterprise femtocells as well as domestic.
Q: Some operators have voiced concerns that, once again, devices are proving slow to arrive for LTE. Do you think this will prove to be a problem?
At this point in time the networks in LTE seem to be a bit ahead of the devices, yes. But I think the industry has learned a lot since the introduction of 3G, and before that, 2.5G and the availability of devices is less of an is- sue than it has been before. There are almost 100 different LTE devices today, launched by more than 35 suppliers—and to have done that by this stage is quite an achievement for the ecosystem.
But there is a rule of thumb that we use that
With the introduction of LTE the number of frequency bands standardised in 3GPP has rapidly increased. There are more bands to cover globally and that means that the device makers have to face the challenge of what type of chipsets they can get and what type of market segments are they going to be serving, for example the local markets plus the roaming customers. They have to be making some choices about the combina- tions of different frequencies. They need to decide what to do.
Q: What applications do you expect LTE to enable?
LTE has a simpler architecture and is more efficient than 3G and it is more suited for data traffic than WCDMA. But I think the industry has to be mindful of the experience from 3G concerning the appeal of new applications. People say high definition video will be one of the killer applications for LTE and then there is the killer experience of a better latency and higher throughput. But I think the jury is still out in terms of what the most successful LTE service or applications will be in different parts of the world a couple of years from now. On the other hand, history shows us that all bandwidth and processing power will always be consumed. n
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