Feeds

NTT researchers predict 10Gbps wireless

Relax - they've only demoed 2.5Gbps with a 50cm range so far...

  • alert
  • submit to reddit

Combat fraud and increase customer satisfaction

ComputerWire: IT Industry Intelligence

NTT Corp, Japan's incumbent telco, claims to have raised the ceiling on wireless bandwidth, after achieving a peak data transfer rate of 2.5Gbps in laboratory trials. The previous highest wireless transfer rate was 1Gbps, but NTT's researchers believe they can ultimately take wireless communications up to 10Gbps.

Given that wireless equipment manufacturers are struggling to build equipment that can realize 2.5Mbps, and fixed-wire equipment makers are struggling to sell switches that already support 10Gbps of sustained capacity, pushing wireless to these dizzy heights might seem a little superfluous.

However, even if there is no immediate need for gigabit wireless links, NTT's researchers are at least exploring technology that uses spectrum that has so far not been utilized by anything else. In a world where radio spectrum is becoming increasingly congested, that alone might be a reason why NTT's efforts could well pay dividends in future.

For instance, the 2.4GHz and 5GHz radio bands, spectrum previously used largely for background telemetry and monitoring tasks is quickly being occupied by IEEE 802.11x WLANs and Bluetooth interconnect links. Further up the scale, wireless local loop technology is colonizing the 20GHz and 40GHz bands, the new Wireless 1394 home multi-media standard will operate at 60GHz, and automotive navigation and in-motion information systems are targeting the 76GHz band. Probably the only reason higher bandwidths have not been exploited is that until now electronic gear hasn't been up to driving signals at frequencies that are starting to approach the optical spectrum.

NTT's solution has been to harness new electronic and optical technologies to access the empty 120GHz radio band. Optical systems are used to generate the original signal which is passed, using amplitude modulation to a 300GHz photodiode, which creates an electrical signal that is passed to a direct slot antenna. The key to the whole process is the 300GHz photodiode, which harnesses optical technology, in this case the Lithium Niobate substrate originally designed for light switching, to the business of generating an electrical signal.

Inevitably, there is great deal to do before NTT's 120GHz wireless technology becomes commercially viable. At the moment, for instance, the sustained 1.25Gbps signal generated in the laboratory has a range of just 50cm. But as spectrum becomes ever scarcer over the next several decades, the motivation to refine this technology will undoubtedly intensify.

© Computerwire.com. All rights reserved.

3 Big data security analytics techniques

More from The Register

next story
This time it's 'Personal': new Office 365 sub covers just two devices
Redmond also brings Office into Google's back yard
Kingston DataTraveler MicroDuo: Turn your phone into a 72GB beast
USB-usiness in the front, micro-USB party in the back
Dropbox defends fantastically badly timed Condoleezza Rice appointment
'Nothing is going to change with Dr. Rice's appointment,' file sharer promises
BOFH: Oh DO tell us what you think. *CLICK*
$%%&amp Oh dear, we've been cut *CLICK* Well hello *CLICK* You're breaking up...
AMD's 'Seattle' 64-bit ARM server chips now sampling, set to launch in late 2014
But they won't appear in SeaMicro Fabric Compute Systems anytime soon
Amazon reveals its Google-killing 'R3' server instances
A mega-memory instance that never forgets
Cisco reps flog Whiptail's Invicta arrays against EMC and Pure
Storage reseller report reveals who's selling what
prev story

Whitepapers

SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.