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Software RadioEnabling Dynamic Spectrum Management : Software Radio Enabling Dynamic Spectrum Management


Vanu, Inc. Background : Vanu, Inc. Background History Founded September ‘98 Spin-off from MIT SpectrumWare project Building software radios since 1994 Core Strengths 7 year's experience implementing software radios Staff: 5 PhD’s, 20 engineers Software engineering, waveform software, system design Core Technology Developed Technology is mature for: infrastructure and public safety markets


Outline : Outline Where are we going ? The future of wireless communications Software radio is the enabling technology Where are we now ? Tremendous progress over the last 10 years What are the next steps ?


The Ideal Software Radio : Hardware Radio Separate devices for different functions Any fix or upgrade needs a hardware change The Ideal Software Radio Software Radio One device for many functions Upgrade through software change


Software Radio + Remote Antennas : Software Radio + Remote Antennas Extended Coverage Shared Infrastructure Better Spectrum Utilization Future Proofing Lower Capital Cost New Revenue sources Fiber or cable backbone Software Radio Cluster


Dynamic Spectrum Utilization : Dynamic Spectrum Utilization


Benefits : Benefits Better Spectrum Utilization System optimized to current channel conditions, user requirements and network traffic Dynamic Spectrum Optimization Make spectrum a commodity Should be able to sublicense portions as needed Use is a function of demand, not regulation Adapts to regional and time sensitive requirements Enable priority access Faster Technology Tracking New services and signal processing are software upgrades Leads to new revenue and even better spectrum utilization


Outline : Outline Where are we going ? The future of wireless communications Software radio is the enabling technology Where are we now ? Tremendous progress over the last 10 years What are the next steps ?


Evolution of Software Radio : Evolution of Software Radio Dual-mode cell phone Modal SDR Software controls and configures the radio ASIC or analog hardware


Evolution of Software Radio : Evolution of Software Radio Dual-mode cell phone Modal SDR Software controls and configures the radio ASIC or analog hardware Reconfigurable SDR All signal processing reconfigurable Significant use of FPGA or assembly code SpeakEasy AirNet


Evolution of Software Radio : Evolution of Software Radio Dual-mode cell phone Modal SDR Software controls and configures the radio ASIC or analog hardware Reconfigurable SDR All signal processing reconfigurable Significant use of FPGA or assembly code SpeakEasy AirNet Software Radio (SWR) Takes advantage of Moore’s Law Portable programs Vanu


Software Radio Phase Space : Source: Mitola, Joseph. “Software Radio Architecture: A Mathematical Perspective”, IEEE JSAC, April 1999. A: HF STR-2000 B: COTS Handset C: SWR Cell Site D: SPEAKeasy II V: Vanu, Inc. Software Radio X: Ideal Software Radio Software Radio Phase Space


State Of Software Radio : State Of Software Radio Technology is mature for infrastructure Basestations Public safety Wireless LAN/MAN/last mile Demonstrated capability at CTIA Cellular Handsets are 3-5 years away Power dissipation constraint Applicable to lower battery like markets today e.g. law enforcement, vehicular


Outline : Outline Where are we going ? The future of wireless communications Software radio is the enabling technology Where are we now ? Tremendous progress over the last 10 years What are the next steps ?


Next Steps : Next Steps SDR Rulemaking is a great start Spectrum licensing needs to be less static SDR device approval needs to expand to include over the air upgrades


Dynamic Spectrum : Dynamic Spectrum Secondary markets would be a good first step Allows some ability to adapt Long term goal: Commodity spectrum market Computerized market maker Authorized traders Need to meet non-interference regualtions Support smaller geographic blocks Real-time bids Acquire spectrum for the region and time required


SDR Waveform Downloads : SDR Waveform Downloads Essential to realize the benefits Spectrum efficiency Technology tracking Platform certification Insure no harmful interference, even with malicious software Radiate under power limitations Within allowed bandwidth Cannot theoretically guarantee correct functionality Can guarantee that it does NOT do certain harmful things


Summary : Summary Software Radio will enable Better spectrum utilization Faster technology tracking New markets and uses for wireless Tremendous progress in the last decade Technology ready for infrastructure today Handsets coming fast Regulation Off to a good start with SDR rule making Next steps: More dynamic spectrum allocation Downloadable waveform upgrades