Feeds

Are carriers learning to love dual-mode?

Nuvoiz sees flat-rate tariffs pushing voice calls onto Wi-Fi

Using blade systems to cut costs and sharpen efficiencies

Mobile networks are at last yielding to the lure of dual-mode phones and voice over Wi-Fi, as flat-rate tariffs turn the business of delivering a call into a cost instead of a revenue.

That's the claim of Chong-Jin Koh, the head of Nuvoiz, a wireless VoIP start-up. He said that, after years of jealously guarding their voice revenues, some carriers have now realised that as average revenue per user (ARPU) moves to a flat rate, it's cheaper to offload call delivery onto Wi-Fi.

"Dual-mode phones will explode over the next five years," he said. "Skype and others are going mobile too, though they're mainly targeting consumers."

The dual-mode approach is especially interesting for mobile carriers which also have Wi-Fi networks. An early Nuvoiz customer is Yozan, which Koh said operates the largest Wi-Fi/WiMax network in Japan, and he added that Orange and Telia-Sonera - both of which have extensive hotspot networks - also have plans for dual-mode.

The main target though is enterprise users - they already have wireless LANs in place, and they want to cut their call costs, Koh said.

However, while static voice-over-Wi-Fi is fine, if you move around you can get breaks in transmission, leading to poor call quality. The problem is the handover time, when the call jumps from one Wi-Fi access point to the next.

So Nuvoiz has developed firmware that pre-authenticates the handset to adjacent cells, so that when a voice call needs to move, it can do so much more quickly. Koh said that VoIP handover can take up to two seconds, but that his software can cut the delay to a barely noticeable 50ms.

There are snags though - in particular, the Nuvoiz software operates at the driver level so it has to be built into the handset and can't be added later. Some carriers will therefore look for VoIP routes that are compatible with today's handsets, hence O2's plan to put GSM nanocells into home broadband routers. ®

HP ProLiant Gen8: Integrated lifecycle automation

More from The Register

next story
Yorkshire cops fail to grasp principle behind BT Fon Wi-Fi network
'Prevent people that are passing by to hook up to your network', pleads plod
Major problems beset UK ISP filth filters: But it's OK, nobody uses them
It's almost as though pr0n was actually rather popular
Apple orders huge MOUNTAIN of 80 MILLION 'Air' iPhone 6s
Bigger, harder trouser bulges foretold for fanbois
Google Nest, ARM, Samsung pull out Thread to strangle ZigBee
But there's a flaw in Google's IP-based IoT system
Microsoft unsheathes cheap Android-killer: Behold, the Lumia 530
Say it with us: I'm King of the Landfill-ill-ill-ill
All those new '5G standards'? Here's the science they rely on
Radio professor tells us how wireless will get faster in the real world
US freemium mobile network eyes up Europe
FreedomPop touts 'free' calls, texts and data
'Two-speed internet' storm turns FCC.gov into zero-speed website
Deadline for comments on net neutrality shake-up extended to Friday
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.