Feeds

China Mobile sees time-sliced evolution

Speedy 4G at Shanghai Expo

Gartner critical capabilities for enterprise endpoint backup

Huawei and Motorola have been working with China Mobile to get a time-duplexed LTE network deployed at the Shanghai Expo, offering 20Mb/sec over cheap and cheerful spectrum.

The deployment is experimental and will only last as long as the Expo, but the companies involved have been demonstrating peak speeds of 80Mb/sec, with 24 simultaneous video streams for those who really, really, like mobile TV.

Long Term Evolution (LTE) is the preferred 4G wireless technology for GSM operators around the world, but the planned deployments (and the single existing one) all use Frequency Division Duplexing (FDD); one frequency for the uplink and a separate one for the downlink. That requires "paired" spectrum, and regulators around the world have been happy to parcel up frequencies that way, rather to the annoyance of the WiMAX crowd who'd like spectrum in big chunks instead.

Current WiMAX deployments use Time Division Duplexing - one frequency is used and the connection flips between sending and receiving.

There are advantages to TDD: devices only need one radio and asynchronous connections can be arranged, but the big difference is that unpaired spectrum is generally cheaper. In Sweden, for example, 100MHz of FDD spectrum at 2.6GHz sold for more than €200m, while 50MHz of unpaired spectrum suitable for TDD only raised €16.5m.

Motorola has been demonstrating that its solutions can roam between LTE networks using FDD and TDD, even managing a live handoff, and is supplying TDD-LTE dongles for the World Expo in Shanghai which kicked off yesterday.

Those dongles will be operating on an LTE network run by China Mobile, with Huawei providing the network infrastructure, and it's only a proof of concept that disappears with the Expo at the end of October.

But assuming the technology works it will demonstrate how LTE can push into the spectrum previously thought of as the exclusive preserve of WiMAX - as though more nails were needed for that particular coffin. ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
6 Obvious Reasons Why Facebook Will Ban This Article (Thank God)
Clampdown on clickbait ... and El Reg is OK with this
So, Apple won't sell cheap kit? Prepare the iOS garden wall WRECKING BALL
It can throw the low cost race if it looks to the cloud
EE accused of silencing customer gripes on social media pages
Hello. HELLO. Can EVERYTHING EVERYWHERE HEAR ME?!
Time Warner Cable customers SQUEAL as US network goes offline
A rude awakening: North Americans greeted with outage drama
Shoot-em-up: Sony Online Entertainment hit by 'large scale DDoS attack'
Games disrupted as firm struggles to control network
BT customers face broadband and landline price hikes
Poor punters won't be affected, telecoms giant claims
Broadband slow and expensive? Blame Telstra says CloudFlare
Won't peer, will gouge for Internet transit
prev story

Whitepapers

Best practices for enterprise data
Discussing how technology providers have innovated in order to solve new challenges, creating a new framework for enterprise data.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
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.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?