02.24.09

Georgia Tech issues CogNEA press release

Posted in CogNeA at 8:05 am by JamesNeel

(link) Yesterday, Georgia Tech issued a press release announcing their membership in CogNEA.

There’s nothing new in the announcement that we didn’t cover earlier, but at least it confirms that I’m not crazy as until now this blog seemed to be the only primary source of information online until now.

02.21.09

CrownCom09 submission deadline delayed to March 2

Posted in conferences at 1:50 pm by JamesNeel

Via email (and on their site), there’s an announcement that the paper submission deadline is now March 2, which is probably a help for anyone in a rush to make the original deadline (Feb 23rd). Tutorial proposals are still due on the 23rd, however.

02.19.09

OfCOM Consultation on Cognitive radio

Posted in Europe, white space at 11:48 am by JamesNeel

(link) OfCOM’s proposed rules for interleaved spectrum access. Like the FCC, it’s also a mix of sensing and geolocation.

Cognitive radio in Lynchburg that’s not from CRT

Posted in Uncategorized at 11:13 am by JamesNeel

Ok, it’s from Tom Rondeau for while he was at VT. But it was a CR article carried in the local paper and Tom is from Lynchburg.

(link) Virginia Tech grad given doctoral award.

A Virginia Tech graduate from Jefferson Forest High School has been awarded one of the nation’s most prestigious honors for doctoral dissertations.

Thomas Rondeau received one of two Council of Graduate Schools (CGS)/UMI Distinguished Dissertation Awards.

See the sidebar of the blog for a link to his dissertation (multi-objective genetic algorithms and learning in cognitive radio).

02.05.09

Other White Space News

Posted in Europe, hidden node margins, white space at 5:04 pm by JamesNeel

Beyond the launching of the database group news below.

(link) White spaces may be coming to Europe.

But the UK is not the only market in Europe, and in less space-restrictive countries it could be practical to utilise white spaces, which explains the White Space Coalition launching a European campaign at the European Conference of Postal and Telecommunications Administrations.

Dr. Alexandre Kholod, of the Swiss Federal Office of Communications, told PolicyTracker, after the meeting, that he didn’t see much spectrum available once mobile and PMSE* applications had been served. The French spectrum agency, ANFR, is preparing a report on the subject of white space use in France, but there are significant concerns about the ability of cognitive radios to avoid TV transmissions.

(link) Canada too. Though their transition isn’t until 2011 so they have some time. Since it’s hard to find a good excerpt, here’s my quick summary. The Canadian Radio-television and Telecommunications Commission (CRTC) is holding hearings starting Feb 17 where white spaces are expected to come up. The CRTC regulators have apparently been following along with and interacting with the FCC efforts.

(pdf) Ofcom released ERA Technology Limited’s analysis of hidden node margins for cognitive radio devices in TV bands (B.S Randhawa, Z. Wang, I. Parker, “Anaylsis of hidden node margins for cognitive radio devices potentially using DTT and PMSE spectrum”). Excerpts from the summary and conclusions:

In the Digital Divident Review (DDR) statement Ofcom indicated that cognitive radio devices (CRD)s will be allowed to use the interleaved spectrum subject to being satisfied that they will not cause harmful interference to digital terrestiral television (TT) or programme making and special events (PMSE) applications. A cognitive device will therefore be required to monitor the UHF band for DTT and PMSE transmissions before being allowed to transmit on locally unused channels.

A short project was previously undertaken by ERA to determine indicative values of the hidden-node margin through direct measurements. This trial estiamted that the average hidden node margin for a cognitive radio device to sucessfully detect a DTT signal at 1.5 m for approximately 90% of all locations, was about 25 dB but in some situations a marfin of 30 dB or greater could be required.

The hidden node calcualtion was bound to an ara defined by the unwanted cognitive interference being greater or equal to the received wanted signal minus the co-channel protection ratio of 25 dB and an extra fade margin of 25 dB, based on the assumption that if the level of inerference was less than a sensitivity level of -117 dBm the cognitive rdevice would not cause interference to the PMSE receiver.

White Spaces Database Group

Posted in Google, white space, white space data group at 4:36 pm by JamesNeel

(link) Yesterday, Google et al announced the formation of a group to standardize whitespace database information.

With a goal of bringing the benefits of white spaces to consumers as soon as possible, the Group intends to establish data formats and protocols that are open and non-proprietary and will advocate that database administration be open and non-exclusive.

[somewhat reordered paragraphs] Founding members of the White Spaces Database Group include Comsearch, Dell, Google Inc., HP, Microsoft Corporation, Motorola Inc., and NeuStar.

(link) The Google public policy blog added:

In the coming weeks and months, members of the group will be offering to the Commission their perspectives, and some specific recommendations, about the technical requirements we would like to see adopted for the database. Many of these specifications ultimately will be heavily technical; put simply, we’ll advocate for data formats and protocols that are open and non-proprietary, with database administration that is also open and non-exclusive.

We don’t plan to become a database administrator ourselves, but do want to work with the FCC to make sure that a white spaces database gets up and running. We hope that this will unfold in a matter of months, not years.