Feeds

Boffins ponder wireless 'hetnets' as home backhaul helpers

There goes the neighbourhood

Beginner's guide to SSL certificates

Heterogeneous networks – hetnets, or WiFi offloading – are all the rage among carriers and equipment vendors, but it generally assumes the WiFi access point has a wired connection.

A group of Greek and UAE researchers has proposed a scheme for using wireless as the backhaul channel. The researchers are particularly looking at how offloading works in home settings, with the growing popularity of femtocells (eNB in the research paper) as ways for providers to stop customers straying off their networks to fixed connections. This is particularly pertinent in places where the fixed infrastructure is running behind mobile network deployment.

The problem is that with three different wireless networks in use (counting the home WiFi), there's a lot of potential for interference. As the Arxiv-hosted paper puts it:

“A UE [user equipment – El Reg] that is directly connected to the eNB, will experience interference caused by adjacent eNBs, which serve other UEs and APs at the same cellular frequencies. On the other hand, considering the eNB→AP→UE scenario, in the first phase, the AP will experience interference from adjacent eNBs which serve other UEs and the APs at the same cellular frequencies, while in the second phase the UE experiences the interference from other APs that serve UEs at the same WLAN frequencies.”

So the researchers want to minimise that interference, without demanding any changes to the cellular network.

Their paper suggests that channel selection, and therefore the interference problem, can be handled at the user-side alone.

The user station uses SINR – the signal to interference-plus-noise ratio – to make two selection choices:

  • Do I connect to the cellular network, the signal from the femtocell, or a WiFi network?
  • How do I select a non-interfering channel?
Home hetnet channel selection diagram

Choose the right channel to make the hetnet work. Image: http://arxiv.org/pdf/1311.2970v2.pdf

As well as helping performance where the user device has to choose between as many as three signals, the extremely maths-heavy paper suggests the scheme could also help relieve traffic from the cellular network. ®

Intelligent flash storage arrays

More from The Register

next story
Azure TITSUP caused by INFINITE LOOP
Fat fingered geo-block kept Aussies in the dark
NASA launches new climate model at SC14
75 days of supercomputing later ...
Yahoo! blames! MONSTER! email! OUTAGE! on! CUT! CABLE! bungle!
Weekend woe for BT as telco struggles to restore service
Cloud unicorns are extinct so DiData cloud mess was YOUR fault
Applications need to be built to handle TITSUP incidents
BOFH: WHERE did this 'fax-enabled' printer UPGRADE come from?
Don't worry about that cable, it's part of the config
Stop the IoT revolution! We need to figure out packet sizes first
Researchers test 802.15.4 and find we know nuh-think! about large scale sensor network ops
DEATH by COMMENTS: WordPress XSS vuln is BIGGEST for YEARS
Trio of XSS turns attackers into admins
SanDisk vows: We'll have a 16TB SSD WHOPPER by 2016
Flash WORM has a serious use for archived photos and videos
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Designing and building an open ITOA architecture
Learn about a new IT data taxonomy defined by the four data sources of IT visibility: wire, machine, agent, and synthetic data sets.
How to determine if cloud backup is right for your servers
Two key factors, technical feasibility and TCO economics, that backup and IT operations managers should consider when assessing cloud backup.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.