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Selected Current Efforts

Selected Current Efforts. Commercial, University, Defense. Commercial Cognitive Radio Standards. 802.11h,y, 802.16h, 802.22. Explicitly opened up Japanese spectrum for 5 GHz operation Part of larger effort to force equipment to operate based on geographic region, i.e., the local policy.

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Selected Current Efforts

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  1. Selected Current Efforts Commercial, University, Defense  Cognitive Radio Technologies, 2008

  2. Commercial Cognitive Radio Standards 802.11h,y, 802.16h, 802.22  Cognitive Radio Technologies, 2008

  3. Explicitly opened up Japanese spectrum for 5 GHz operation Part of larger effort to force equipment to operate based on geographic region, i.e., the local policy 802.11j – Policy Based Radio 2.4 GHz 5 GHz • US • UNII Low 5.15 – 5.25 (4) 50 mW • UNII Middle 5.25 – 5.35 (4) 250 mW • UNII Upper 5.725-5.825 (4) 1 W • 5.47 – 5.725 GHz released in Nov 2003 • Europe • 5.15-5.35 200 mW • 5.47-5.725 1 W • Japan • 4.9-5.091 • 5.15-5.25 (10 mW/MHz) unlicensed  Cognitive Radio Technologies, 2008

  4. 802.11e – Almost Cognitive • Enhances QoS for Voice over Wireless IP (aka Voice over WiFi ) and streaming multimedia • Changes • Enhanced Distributed Coordination Function (EDCF) • Shorter random backoffs for higher priority traffic • Hybrid coordination function (orientation) • Defines traffic classes • In contention free periods, access point controls medium access (observation) • Stations report to access info on queue size. (Distributed sensing)  Cognitive Radio Technologies, 2008

  5. Dynamic Frequency Selection (DFS) Avoid radars Listens and discontinues use of a channel if a radar is present Uniform channel utilization Transmit Power Control (TPC) Interference reduction Range control Power consumption Savings Bounded by local regulatory conditions 802.11h – Unintentionally Cognitive  Cognitive Radio Technologies, 2008

  6. Ports 802.11a to 3.65 GHz – 3.7 GHz (US Only) FCC opened up band in July 2005 Ready 2008 Intended to provide rural broadband access Incumbents Band previously reserved for fixed satellite service (FSS) and radar installations – including offshore Must protect 3650 MHz (radar) Not permitted within 80km of inband government radar Specialized requirements near Mexico/Canada and other incumbent users Leverages other amendments Adds 5,10 MHz channelization (802.11j) DFS for signaling for radar avoidance (802.11h) Working to improve channel announcement signaling Database of existing devices Access nodes register at http://wireless.fcc.gov/uls Must check for existing devices at same site 802.11y  Cognitive Radio Technologies, 2008 Source: IEEE 802.11-06/0YYYr0

  7. Modify 802.11 MAC to create dynamic self-configuring network of access points (AP) called and Extended Service Set (ESS) Mesh Status Standard out in 2008 Numerous mesh products available now Involvement from Mitre, NRL Features Automatic topology learning, dynamic path selection Single administrator for 802.11i (authentication) Support higher layer connections Allow alternate path selection metrics Extend network merely by introducing access point and configuring SSID 802.11s IP or Ethernet  Cognitive Radio Technologies, 2008

  8. Draft to ballot Oct 06, 67% approve, resolving comments) Improved Coexistence Mechanisms for License-Exempt Operation Explicitly, a cognitive radio standard Incorporates many of the hot topics in cognitive radio Token based negotiation Interference avoidance Network collaboration RRM databases Coexistence with non 802.16h systems Regular quiet times for other systems to transmit 802.16h From: M. Goldhamer, “Main concepts of IEEE P802.16h / D1,” Document Number: IEEE C802.16h-06/121r1, November 13-16, 2006.  Cognitive Radio Technologies, 2008

  9. 802.22 • Wireless Regional Area Networks (WRAN) • First explicit cognitive radio standard • Aimed at bringing broadband access in rural and remote areas • Takes advantage of better propagation characteristics at VHF and low-UHF • Takes advantage of unused TV channels that exist in these sparsely populated areas • Status (IEEE 802.22-06/0251r0) • First draft finishing • First vote in Mar • Published 2009?  Cognitive Radio Technologies, 2008

  10. Universities Participating at DySPAN 2005 • Bar-Ilang Univ. • Georgia Tech • Mich. State Univ. • Michigan Tech • MIT • Northwestern Univ. • Ohio Univ. • Rutgers Univ. • RWTH Aachen Univ. • Stanford Univ. • Univ. of Calif. Berkeley • Univ. of Cambridge • Univ. of Col. • Univ. of MD • Univ. of Pittsburg • Univ. of Toronto • Univ. of Warwick • Universitaet Karlsruhe • University of Piraeus • Virginia Tech  Cognitive Radio Technologies, 2008

  11. Cognitive Radio and Military Networks How is the military planning on using cognitive radio?  Cognitive Radio Technologies, 2008

  12. Drivers in Commercial and Military Networks • Many of the same commercial applications also apply to military networks • Opportunistic spectrum utilization • Improved link reliability • Automated interoperability • Cheaper radios • Collaborative networks • Military has much greater need for advanced networking techniques • MANETs and infrastructure-less networks • Disruption tolerant • Dynamic distribution of services • Energy constrained devices • Goal is to intelligently adapt device, link, and network parameters to help achieve mission objectives  Cognitive Radio Technologies, 2008 From: P. Marshall, “WNaN Adaptive Network Development (WAND) BAA 07-07 Proposers’ Day”, Feb 27, 2007

  13. Wireless Network after Next (WNaN) Program Organization Reliability through frequency and path diversity Intelligent agent cross-layer optimization  Cognitive Radio Technologies, 2008 Figures from: P. Marshall, “WNaN Adaptive Network Development (WAND) BAA 07-07 Proposers’ Day”, Feb 27, 2007

  14. DARPA’s WNAN Program WNaN Protocol Stack • Objectives • Reduced cost via intelligent adaptation • Greater node density • Gains in throughput/scalability • Leveraged programs • Control Based MANET– lowoverhead protocols • Microsystems Technology Office – RFMEMS, Hermit, ASP • xG – opportunistic use of spectrum • Mobile Network MIMO - MIMO Wideband Network Waveform • Connectionless Networks – rapid link acquisition • Disruption Tolerant Networks (DTN) – network layer protocols CBMANET Optimizing Topology CBMANET WNaN Network CBMANET WNaN MAC xG MIMO (MNM) COTS Physical MEMS (MTO)  Cognitive Radio Technologies, 2008 Other programs WNaN program Legend

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