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The path to market success for dynamic spectrum access technology

The path to market success for dynamic spectrum access technology. John Chapin and William Lehr. Why this paper?. Not technical in particular A general view. Definitions. Cooperative DSA Only with permission of the PM Non-cooperative DSA Does not require permission (UWB, underlay)

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The path to market success for dynamic spectrum access technology

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  1. The path to market success for dynamic spectrum access technology John Chapin and William Lehr

  2. Why this paper? • Not technical in particular • A general view

  3. Definitions • Cooperative DSA • Only with permission of the PM • Non-cooperative DSA • Does not require permission (UWB, underlay) • Spectrum etiquette • PHY (power) • MAC (listen-before-talk)

  4. Enablers • Available spectrum • Customer demand • Low transaction cost

  5. Available spectrum • Market Process • Perceived risk of interference low enough • Pricing (below-equilibrium-price to start with) • Regulatory action • Enough 2nd spectrum to start with • Shared between federal and non-federal users • Example: 5G unlicensed band is shared with military radar

  6. Cont’d • Current status • FCC rulemaking • Slow in practice, chicken-egg problem • Limited # of players, limited (long-term) guarantees, investment cost • XG: military to military sharing • Unlicensed band can benefit from DSR • WLAN that does not interfere with cordless phone • WLAN that avoid microwave, bluetooth, etc. • Home-networking experience: WLAN, microwave, Bluetooth, cordless phone, sensor networks, etc. • A general view: • Smart (heterogeneous) devices work better together, with or without spectrum reforms • Current and future • XG: military to military • 4G will be an integrated heterogeneous system • Integrated WiFi/WiMAX • Smart WiFi/mesh

  7. Customer demand (expand) • Initial customers • Equipment vendors (WiFi access points with better agility) • Service providers (cellular) • On-demand applications • Hotels hosting a convention • Football games • Community networks • DIFFERENT QoS (not necessarily worse) • DSR vs. demand-and-control (analogy: Internet vs. telephone nw) • Different properties at different bands, e.g., DSR in VHF band for better penetration • Multimedia services for cellular (not affordable at voice price) • Best-effort service, delay-tolerance service • Or bundle with a band with guaranteed access right (e.g., cellular using extra band through DSR) • Or bundle multiple DSR bands together • If price is right! • Legacy applications • Protection, especially with multiple un-coordinated secondaries • New applications are often unforeseeable • 2.4G was considered as the junk band • A lot of these issues are good research topics!

  8. Costs and risks (follow the paper) • Costs: • Searching for opportunities, FCC regulations • Spectrum brokers • Cooperative DSA • Interference • Trust • Retract access rights by regulators • No guarantee for 2nd users after demonstration of success business model • Non-cooperative DSR • Monitoring, analysis, signaling, cost of mistake • Conservative • Information registry/database: geo location, signature (waveform, pilot), time of operation

  9. Industry structure • Spectrum trading • Spectrum aggregating and partitioning • Spatial, temporal, and frequency domain • Distributor type 2 as a trusted third party • Install and operate monitoring and analysis systems • Such a monitoring nw may be needed in general • Feasibility and fidelity • How many monitors, where, and how to share information

  10. Notes • An interesting paper with related work • Papers from a researcher in the area • Papers from a conference/special issue • An open question/topic • focus • Update Wiki (reverse chronicle order) • First paper is the must read • Links for slides? • Similar group meeting update at wiki

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