Feeds

IEEE drops support for rival standard from powerline LAN spec

1901 won't be G.hn compatible after all

Secure remote control for conventional and virtual desktops

The IEEE-backed attempt to define a universal standard for powerline networking has dropped plans to ensure compatibility with rival world home LAN standard G.hn.

Late last year, members of the IEEE P1901 working group voted to include G.hn, a standard being developed under the auspices of the International Telecom Union (ITU), within the 1901 specification.

But at a meeting held in Boston, Massachusetts this week, the proposed addition of a G.hn-compatible physical and transport layers - PHY and MAC - were removed from the draft specification. Development of the G.hn MAC and PHY will stop.

In some respects, it's a sensible move. G.hn compatibuility was added at the behest of companies who are, by and large, keener on G.hn than 1901.

G.hn uses a single PHY specification to allow networking traffic to be transported over mains wiring, phone cable and coax lines. By contrast, 1901 contains two, incompatible PHY specs, the better to accommodate different working group members' preferences. Both are optional. One implements FFT (Fast Fourier Transform) modulation to ensure compatibility with existing powerline kit that meets the HomePlug standard - which is why the HomePlug Powerline Alliance (HPA) is so keen on 1901. The second PHY adds wavelet compression. It's not HomePlug compatible, but is widely believed to enable more robust, faster data transfer. It comes from Panasonic.

Adding support for G.hn would involve adding a third PHY combo, and clearly the P1901 members have decided two is enough.

Besides, if 1901 offers G.hn support, what's to stop potential backers from equipping kit only with G.hn but still claiming compatibility with both standards? Or, for that matter, bothering with 1901 at all?

Now they will have to, and the P1901 group has ensured its standard is less likely to become in irrelevance, at least for home networking. The standard also takes in routing broadband feeds over mains cabling into the home. ®

Special Report
G.hn-ing for gigabit How the next-gen home LAN standard war was won

Secure remote control for conventional and virtual desktops

More from The Register

next story
Brit telcos warn Scots that voting Yes could lead to HEFTY bills
BT and Co: Independence vote likely to mean 'increased costs'
Phones 4u slips into administration after EE cuts ties with Brit mobe retailer
More than 5,500 jobs could be axed if rescue mission fails
New 'Cosmos' browser surfs the net by TXT alone
No data plan? No WiFi? No worries ... except sluggish download speed
Radio hams can encrypt, in emergencies, says Ofcom
Consultation promises new spectrum and hints at relaxed licence conditions
Blockbuster book lays out the first 20 years of the Smartphone Wars
Symbian's David Wood bares all. Not for the faint hearted
Bonking with Apple has POUNDED mobe operators' wallets
... into submission. Weve squeals, ditches payment plans
'Serious flaws in the Vertigan report' says broadband boffin
Report 'fails reality test' , is 'simply wrong' and offers ''convenient' justification for FTTN says Rod Tucker
This flashlight app requires: Your contacts list, identity, access to your camera...
Who us, dodgy? Vast majority of mobile apps fail privacy test
Apple Watch will CONQUER smartwatch world – analysts
After Applelocalypse, other wristputers will get stuck in
prev story

Whitepapers

Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
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?
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.