ECWS Presentations from 802 Plenary
While I wasn’t there , 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.
Conferences and Contests
(link) The SDRF sends a reminder that abstracts are due March 20.
(link) The 3rd annual Smart Radio Challenge is now open.
(link) 12th Annual Conference on Modeling, Analysis and Simulation of Wireless Mobile Systems will have a cognitive radio track. It’ll be in the Canary Islands. Key dates:
Paper submission deadline April 25, 2009
Notification of acceptanceJuly 5, 2009
Tutorial submission deadline June 5, 2009
Workshop submission deadline March 30, 2009
(link) In conjunction with WiOPT09, RAWNET – The 5th workshop on Resource Allocation, Cooperation and Competition in Wireless Networks – is inviting papers on cognitive spectrum management. The conference will be held in Seoul on June 27, 2009. It’s particularly interested in papers related to the cooperation and competition in wireless networks.
Extended submission deadline : March 15, 2009
Notification of acceptance : April 1, 2009
Camera-ready papers due : May 1, 2009
White Space Related News
(link) WIth some public safety entitites, the CTIA urges ban of secondary access in 700 MHz. Looks mostly focused on clearing out legacy wireless microphones and ensuring that white space devices don’t creep up the spectrum.
(link) NAB is suing to try and block white space devices. This surprising to me as I thought geographic databases and non-adjacency were what MSTV and NAB were looking for. The suit certainly colors my opinion of MSTV and NAB’s efforts viz a viz the white spaces.
(pdf) Stealing a march on the White Spaces Database Group, SpectrumBridge announced the creation of a on online website (ShowMyWhiteSpace.com) to identify available whitespaces by geographical location. It failed for my house, but worked for the White House. (Guess I’m not important enough)
white space database screen capture
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.
While trying to find time to fix WordPress, several solicitations for cognitive radio papers have popped up which makes for a longer listing than normal below the fold.
Read the rest of this entry »
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:
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.
(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)
(link) CrownCom09 has a call for papers up. It’s a big enough CR conference that I don’t think I have to sell it, so the key information (follow the link for more info):
Conference Site: Hannover, Germany, June 22-24, 2009
- Paper Submission Due: 23rd February 2009
- Tutorial Proposals Due: 23rd February 2009
- Special Session Proposals Due: 3rd November 2008
- Acceptance Notification: 20th April 2009
- Final Papers Due: 4th May 2009
(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.
First, contrasting viewpoints on white space testing:
(link) From Shure (after the Redskins / BIlls test):
“The FCC’s tests of prototype white space devices at FedEx field prior to Saturday’s game between the Redskins and the Bills conclusively show that spectrum sensing white space devices will cause harmful interference to wireless microphones during live events. Simply stated, the prototype devices were unable to consistently identify operating wireless microphones or distinguish occupied from unoccupied TV channels. More troubling, the devices failed to detect the presence of wireless microphones when switched on – an occurrence that takes place multiple times during any NFL game.
(link) From Motorola:
In an interview yesterday with FierceWireless, Steve Sharkey, Motorola’s senior director, regulatory and spectrum policy, said that the FCC has just finished most of the outdoor white space device testing and that Motorola’s white space device did very well in the tests. Sharkey said that Motorola uses geolocation technology, which means it uses a combination of location technology (such as GPS) and a database that advises the device on what channel to use and whether or not there is compatibility with other white space devices.”The geolocation approach has proved highly reliable,” Sharkey says.
(link) And Verizon wants white space devices licensed:
“Generally we have favored licensed spectrum,” Tauke said at a press conference, “but we are continuing to look at what the potential may be here.” On the other hand, he said he wanted to be certain that these applications, currently being evaluated by the FCC, don’t interfere with Verizon wireless products or anything else. “Nobody has passed the test” just yet, Tauke said.
My two cents. Applying these sorts of political slants to what should be a purely technical assessment (I have no first hand knowledge of the testing and no particular dog in the fight, but it seems to me they can’t all be right on the assessment) is inherent to decisions related to public goods and is a reason (among many) why I wish we would start transitioning to a regulatory regime that more closely mimicked private property.
(link) Effectively the same Motorola story as above, but this link has a line I want to discuss further.
Sharkey calls the tech “absolute, solid protection,” which should make members of the white space coalition happy — though we haven’t heard positive word from Philips, Adaptrum and InfoComm yet, who were also testing devices alongside Motorola, but aren’t using the geolocation technology. That, and the FCC has the final word on all of this, so we’ll just have to wait for that word from on high before we start riotous, interference free partying in the streets
The emphasis was in the original. There was a paper submitted to DySPAN that I wanted accepted (though not a very good paper and not anyone’s I know so ’twas rejected) which unwittingly made what I think is an important point – if 1) a primary user is turning off and on at unpredefined times and 2) is not helping secondary users (via a beacon or via any other method), then 3) secondary users will have to detect the presence of the primary when it starts transmitting. This then means that you simply can’t have assurances of interference-free operation if you want the secondary system to have any sort of useful throughput.
In practice, this means if we are constrained to detecting wireless mics via detection methods only, we will not be able to guarantee interference-free operation.
On a related note, I think IEEE USA did a real disservice to cognitive radio with their advocacy as it sets up the technology to fail by suggesting an impractical condition is inherent to the concept of cognitive radio.
By definition, CRs should be inherently non-interfering on a completely independent basis.
(link) Keith has done a valuable service and posted site measurements as matlab files on the DySPAN conference site for any researcher to use (mmm… real data). Unfortunately the DySPAN site appears to be down at the moment, so do check back later on this link. *Update* Here’s a direct link (zip).
Got an email stating that ISABEL08 is unofficially open for submissions until Aug 10. (I can’t go, it conflicts with the SDR Forum)
Since it still says that paper acceptance should occur today on the DySPAN website, I thought it would be a public service to pass along a note I got from Milind Buddhikot (technical co-chair) today.
“We plan to send out ACCEPT notifications on August 8 and request final photo-camera ready papers to be submitted to IEEE by August 21.”
(link) The International Symposium on Wireless and Pervasive Computing has issued a call for papers. Related topics include cognitive radio and cooperative communications. It’ll be held from Feb 11-13, 2009 in Melbourne, Australia. Papers are due October 12.
(link) The schedule for the next SDRF meeting / workshop is now posted. The focus of the workshop is “Government and Industry R&D Agendas for Next Generation Radio Technologies” (read as cognitive radio) and Bill Lehr (MIT) will give a talk on “Building the Ecosystem for Commercial Cognitive Radio”. Interestingly, the agenda page (pdf) lists meeting times for a white space task group. (Other than an agreement that it would be a good idea, it hasn’t actually gotten off the ground yet.)
(link) White Space Tests at the DNC and RNC conventions?
(link) The WaPo has a nice article (from yesterday) overviewing the current round of testing. Interestingly, only the Motorola device is aided by geolocation – something I expect to eventually be a requirement. (The WaPo sometimes requires a login, if you’re asked for one, try these.)
(link) DySPAN demo synopses have been posted.
(link) Omesh is a new (to me) cognitive network spinout from the University of Toronto.
(link) FCC to being field testing of white space devices soon. [Most of the article is about MSTV + Shure vs the WSC]
(link) A press release on the policy / DSA Yuma field trials by Shared Spectrum, Thales, and Harris.
The following came up during today’s SDR Forum General Meeting downselected to those things which were new / news to me.
SCORED (Software and COgnitive Radio for European Defense)
An overview is given in this presentation (pdf). Appears to combine Thales, INDRA, SELEX, and Ericsson with a primary focus on SDR with the hopes of adapting the SCA for use for European applications. CR architecture appears to be building on E2R architecture. It started in 2007.
NTIA DSA Coordination Group – generally keeps NTIA informed of DSA technology developments (can’t find a link, but it is mentioned on this site which means half of CRT knew of it even if the other half didn’t)
Peter Tenhula noted the # of short some spectrum lease arrangements were actually down in the most recent quarter (27 as opposed to 32). Spectrum Bridge may have entered the market too early, but then again it might pick up during the 700 MHz build-out.
26 FCC IDs for SDR have now been granted (as of June 2008). Of interest, new ones were granted to Aruba and Trango using DFS for ISM / UNII bands presumably on WiFi devices.
Some unspecified government cognitive radio R&D project in Japan is supposed to start up (and specify details?!?) in July 2008. A similar situation is apparently occuring in Korea. If I hear something more concrete, I’ll post links.
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.
are now posted online here.
Wireless Net DesignLine article on the increasing use of interference avoidance techniques in the 2.4 GHz band.
At the same time as VT’s symposium, Microsoft’s Research Symposium on Cognitive Radio is going on over the 5th and 6th. Papers and presentations are supposed to be published online soon.
An overview of Pentagon efforts to address spectrum issues in Signal Magazine online.
The wireless mic community still doesn’t like unlicensed white space devices (link).
Joe Mitola gave the keynote address this morning at VT’s Wireless Symposum entitled “The Future of Cognitive Radio.”
My brief notes are below the fold. Read the rest of this entry »
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