Quick Links 3/13/09 [Update]

Posted in 802.19, coexistence, conferences, military, public safety, SDRF, shameless self-promotion, white space at 11:10 am by JamesNeel

ECWS Presentations from 802 Plenary

While I wasn’t there icon_sad, the March 802 Plenary had a major presentation from the ECWS (in fact it was the primary deliverable for the group.) Based on email traffic I’ve read, it looks unclear at this point in what form this will be continuing on as. [Update 3/16/09 – ECWS disbanded, coexistence work continues in 802.19 as a study group with the outputs of two documents “one on coexistence scenarios and one on coexistence mechanisms, with a plan for when the deliverables will be completed, with interim steps” (802.19 note from here and ECWS disbanding coming via email)]

Nonetheless, if you want to get up to speed on their activities, these two links will do a good job.

(pdf) Tutorial. Quite a large file (~ 7.25 MB), but lots of good information.

(ppt) ECWS Chair’s Report. (Just main takeaways from tutorial and much smaller)

(pdf) Spectrum Sharing in TV White Space Workshop.

As part of its June meeting in Detroit (June 15-18), the SDR Forum will host a workshop on coexistence of TV white space devices on June 16. They’re currently soliciting proposals for presentations through April 1.

(no link) Cognitive Radio and Intelligent Transportation Systems at SDRF ITS Workshop

Intelligent Transportation Systems effectively apply the concept of a cognitive system to the management of transportation systems (gather information, recognize patterns, apply rules / reason, learn from past actions). Wireless links play a big role in transferring information and control messages and cognitive radio can help improve the communications quality and availability in this highly dynamic environment. Once cognitive radio is integrated into and fielded with ITS, we’ll have “cognitive systems of cognitive systems”, which is one of the broader trends I see for the future.

As of this week, I’ll be giving a 30-minute talk with Ashwin Amana on cognitive radio and intelligent transportation systems at the SDR Forum ITS Workshop, also at the SDR Forum Detroit meeting (so many great workshops crammed into such a short meeting).

(link) IWCE Panel to Discuss Cognitive Radio

Really, it’s a panel to highlight NIJ’s communications related research efforts. But one of the major thrusts has been cognitive radio. Charles Bostian of VT will be discussing their NIJ-funded efforts to create the Public Safety Cognitive Radio (PSCR) node. IWCE is March 16-20 (Vegas), and the panel is on March 18th, from 1:30-2:45 PM.

(link) EMC Electronica article on embedded SDR and CR.

Not the most illuminating article, but it does note the natural relationship between SDR and CR (though very DSA focused) and the role of embedded processing in realizing CR. Really, this is just an excuse to note that CRT is currently executing a SBIR to realize embedded cognitive spectrum management on JTRS radios (JTRS defines a DoD standard for SDR platforms). (pdf of a flyer we pass out on the topic)

(link) New CR Blog

I don’t know who he is, but James (not me) is posting his notes on his “4th year project on cognitive radio” as it progresses. At least so far, he’s doing a good job of capturing and linking to important papers.


Cognitive Radio Activities at SDRF / JSTeF San Diego Jan 09 Meeting

Posted in conferences, CRWG - cognitive radio work group, shameless self-promotion, white space test group at 12:58 pm by JamesNeel

The agenda for the next SDR Forum meeting has been posted. It’s in San Diego from January 26-30 and will be co-hosted with the JTRS Science and Technology Forum.

The following cognitive radio related activities will go on:

CRWG Meeting

The Cognitive Radio Work Group will be meeting primarily to continue putting together an extensive survey document on quantifiable benefits of cognitive radio for later use in ITU submissions and position papers as well as general evangelization on cognitive radio

White Space Test Group

The White Space Test Group will be meeting primarily to work on use case documents for input to the 802 ECSG on white spaces and for later SDRF development of test specifications for white space devices.

Meta-language for Mobility Work Group

I’m not certain what the MLM group will be doing as they just finished up a use case document (where can meta-languages help supprot cognitive radio). They generally coordinate with 1900.5 and may be working on specifications. (Oddly, I only have so many hours in the day and can’t participate in everything)

Public Safety SIG

While dealing with more general public safety comm / SDR issues, at least some of their meeting time will likely be used to work on their cognitive radio use case document (intended to help identify required technologies / insertion points).

Cognitive Radio JTRS SBIR Briefings

Shared Spectrum and CRT (us) will each give 20-minute briefings on our JTRS-sponsored Phase I SBIRs on cognitive spectrum management.

I’m not certain what they’ll speak on, but I figure it’ll be on policy and DSA. Their open abstract is here.

We’ll talk about distributed non-collaborative spectrum optimization / management of MANETs and what we did in Phase I (our open abstract is here). Besides the big benefits for managing an integrated network, we think our little algorithm suite will be particularly useful for coexistence of white-space devices running incompatible waveforms, so we might touch on that some too.


Final SDRF and DySPAN Programs Technical Programs online

Posted in conferences, shameless self-promotion at 5:50 pm by JamesNeel

(link) DySPAN Program (pdf)

(link) SDRF Program (pdf) (This link may be better for an “at-a-glance” sort of view, though it’s not as complete)


Quick Links (9/13/08)

Posted in conferences, Jobs, quick links, shameless self-promotion at 10:07 am by JamesNeel

(link) CSIRO PhD position on Cognitive Radio in Multi-hop Wireless Networks

(link) AccessNets (Oct 15-19, Las Vegas) will have a panel session on the “Successes of Dynamic Spectrum Management”

(link) The Communication Networks and Services Research Conference has issues a call for papers. Topics include cognitve radio, software radio, ad-hoc networks, Details

  • Dec 5: Submission deadline
  • Feb 9: Acceptance Date
  • May 11-13 Moncton, New Brunswick Conference

(link) Overview of VT’s historical research efforts. Jeff and cognitive radio gets discussed some.


Quick Links 8/26/8 [Updated]

Posted in artificial intelligence, quick links, shameless self-promotion, white space at 10:43 pm by JamesNeel

(link) Shared Spectrum, and Mark McHenry in particular, gets a nice writeup in the WaPo. The politics of unlicensed white space also comes up.

(link) IET Workshop on SDR and Cognitive Radio. It’s in London on the 18th, so I won’t be there. But Keith from CTVR will be. *UPDATE* In the comments, Keith notes that some of the presentations may appear as webcasts at this site.

(link, pdf) On Monday, Oct 27 E3 and the SDR Forum will host a joint workshop on business, exploitation modem architecture, regulation and standardization aspects of SDR and CR. I’m tentatively slotted to give an outbrief on the SDR Forum’s contribution to an ITU report on “Cognitive radio systems in the land mobile service.” (lots of interesting stuff to cover in 30 minutes)

(link) Cognitive radio got some love at the Intel Developers’ Forum. I don’t see the talk in the catalog though.


Google suggests wireless mics should switch to CDMA

Posted in shameless self-promotion, TV Bands, white space at 9:23 am by JamesNeel

Google has a combative white paper up arguing that wireless mics should switch to CDMA (with cognition to adapt spreading codes). Here’s a direct link to paper (pdf)

My comments:

1) I don’t think implicitly arguing that wireless mics should switch to spread spectrum will advance the white space cause. Comes across as a bait (no interference to legacy systems!) and switch (legacy systems must change!).

2) I think you can get very close to what Google wants with pseudo-noise codes or fast frequency hoppers as opposed to adaptive codes which could have some significant stability issues with 300+ uncoordinated adapting mics all in close vicinity unless done right.

3) I do think it would be a good thing to use digital spread spectrum mics instead of analog mics, but Google (and this applies to me as well) is the wrong one to be making the case. Because of the messenger, it’ll likely slow the transition.


SDR Forum Tutorials

Posted in conferences, shameless self-promotion at 6:16 pm by JamesNeel

Tomorrow’s news today!

Notifications of tutorial selections haven’t gone out yet (not due until the 18th), but the lineup of SDR Forum Tutorials is posted here. I’m currently slated to give a tutorial on analyzing cognitive radio networks Monday morning.


Conference updates / reminders [Updated]

Posted in conferences, shameless self-promotion at 9:40 am by JamesNeel

Got an email from the SDR Forum. Apparently their still soliciting papers for SDRF Technical Conference 08 though that’s not on the Call For Papers page.

The Wireless Symposium / Summer School at Virginia Tech starts tomorrow (pdf of program). I’ll be there and giving a couple tutorials, though none on cognitive radio (wireless standards and a little history of the role of intellectual property in wireless businesses). I’ll update this post with links to slides later.

Update Links to the presentations are on the CRT Publications page.


Wireless @ VT Wireless 2008 Summer School

Posted in conferences, shameless self-promotion at 2:52 pm by JamesNeel

Wireless @ Virginia Tech will be hosting its annual “Wireless Summer School” at Virginia Tech from June 4-June 6. Registration fee is $720 with discounts for presenters and W@VT affiliates.

The conference combines a modest paper track with an extensive tutorial track from professors and industry researchers. The majority of the focus is on cognitive and software radio. In addition to a keynote from Joe Mitola III on “The Future of Cognitive Radio” (June 4) and numerous papers and posters on cognitive radio, the following are tutorials pulled from the schedule (pdf) which I think are relevant:

J. Mitola, The Future of Cognitive Radio (June 4 – Keynote)

 Selected June 4 Tutorials 

L. DaSilva & A. MacKenzie, “Cognitive Radios, Cognitive Networks, and Dynamic Spectrum Access”

J. Neel & J. Reed, “Emerging Wireless Standards” (basically a hyper-compressed version of this)

 Selected June 5 Tutorials

B. Farhang-Boroujeny, “Signal Processing Techniques for Spectrum Sensing and Communication in Cognitive Radio Networks”

R. Zekavat, “Wireless Positioning Technologies for Mobile Ad-hoc Networks”

Selected June 6 Tutorials

F. Kragh & C. Dietrich, “Hands-On Introduction to SCA-Based Software Defined Radio (SDR) Education and Research”

S. Kadambe, “Signal Detection and Classification”


Towards a Virtual Cognitive Radio Economy

Posted in shameless self-promotion at 4:05 pm by JamesNeel

That’s the title of an abstract I just submitted to DySPAN08 (you have until the 17th! Tick Tock! Also ignore the DySPAN CFP date, what matters is the submission closing date given by EDAS ). (And no, this wasn’t motivated by the thought of using screencaps from World of Warcraft in a technical presentation. Well ok maybe it was a little. I really do think it’s a good idea.)

Basically, in my preferred vision of the future, all interactions between cognitive radios (not just spectrum access!) would occur within the context of a virtual economy. There’s a number of things that will have to be developed to pull it off (like a well-defined property rights, reputation mechanisms, mechanisms for interfacing with the “real” economy) which will be discussed in the paper along with some basic properties of a virtual cognitive radio economy (broad assurances of stability and convergence with perfect information, extensibility to any new service, automated load balancing, reduced information transfer, simplified movement of information across domains) and some other stuff (like what are the features of a virtual economy?).

Now I’ve got a month to write it. The abstract is below the fold. If there’s things you think I should address, feel free to leave a comment. I’ll also try and post working drafts as I go along in the hopes of getting feedback before I submit the final version. Read the rest of this entry »


Publications Update

Posted in shameless self-promotion at 4:19 pm by JamesNeel

I’ve been kinda lax about updating the CRT publications page, but as of today there’s four new CRT publications listed.

One is a paper I did with some folks from ETRI which was presented way back at the beginning of October at VTC.

Another is a paper I worked on with Youping Zhao (SSC), Shiwen Mao (VT), and Jeff Reed (CRT, VT) (we’re all Hokies) and submitted yesterday to an IEEE proceedings on cognitive radio.

The final two are documents which CRT contributed to the SDR Forum response to an ITU inquiry on cognitive radio, specifically on coexistence and spectral efficiency. Those will end up getting discussed at the next SDR Forum meeting. I don’t know that those sorts of things are typically published separately like this, but I think the SDR Forum responses will be of interest to the broader cognitive radio community and if you’re not involved in the ITU process or the SDR Forum response, you wouldn’t have access to them for better than a year, if ever, which I think is a real waste. 

I can’t post others’ responses, but if other contributors make their submissions available online, I’ll link to them. And if and when the SDR Forum response gets posted online, I’ll try to link to that as well.


CrownCom07 Reminder

Posted in conferences, shameless self-promotion at 6:22 pm by JamesNeel

CrownCom (Cognitive Radio Oriented Wireless Networks & Communications) 07 will be held next week in Orlando from July 31-August 3. The technical program is available here.

James Neel from CRT will be in attendance and will present “Interference Reducing Networks” in Session 2-A (afternoon on the 1st) and will chair session 4-A (afternoon on the 2nd). The paper and the presentation slides will be available for download on CRT’s Publications page.