频谱共享创新试验台试点项目2011财年进展报告

NATIONAL TELECOMMUNICATIONS ANDINFORMATION ADMINISTRATION Lawrence E. Strickling, Assistant Secretary forCommunications and Information DECEMBER2011 TABLE OFCONTENTS I.BACKGROUND……………………………………………………….…….1II.OVERVIEW OF DYNAMIC SPECTRUM ACCESS…………………….2TECHNOLOGIESIII.PHASE I TEST PLAN………………………………………………………3IV.STATUS OF PHASE I TESTING…………………………………………..4V.PHASE II/III TEST PLAN……...…………………………………………..5VI.PLANNED FISCAL YEAR 2012 ACTIVITIES…………………………..5 I.BACKGROUND The National Telecommunications and Information Administration (NTIA), incoordination with the Federal Communications Commission (FCC) and the Federalagencies, established a Spectrum Sharing Innovation Test-Bed (Test-Bed) pilot programto examine the feasibility of increased sharing between Federal and non-Federal users.This pilot program is an opportunity for the Federal agencies to work cooperatively withindustry, researchers, and academia to examine objectively new technologies that canimprove management of the nation’s airwaves. The Test-Bed pilot program evaluates the ability of Dynamic Spectrum Access(DSA) devices employing spectrum sensing and/or geo-location techniques to sharespectrum with land mobile radio (LMR) systems operating in the 410-420 MHz Federalband and in the 470-512 MHz non-Federal band.1To address potential interferencetoincumbent LMR spectrum users, the Test-Bed pilot program includes both laboratory andfield measurements performed in three phases to characterize the interaction with DSAenabled devices: Phase I – Equipment Characterization. Test-Bed participants sent equipmentemploying DSA techniques to the NTIA Institute for TelecommunicationSciences (ITS) in Boulder, Colorado to undergo characterization measurements ofthe DSA capabilities in response to simulated environmental signals. Phase II – Evaluation of Capabilities. After successful completion of Phase I,NTIA will examine the DSA spectrum sensing and/or geo-location capabilities ofthe equipment in the geographic area of the Test-Bed. Phase III – Field Operation Evaluation.After successful completion of PhaseII, NTIA will permit the DSA equipment to transmit in an actual radio frequencysignal environment. An automatic signal logging capability will be used duringoperation of the Test-Bed to help resolve interference events if they occur. NTIAwill establish a point-of-contact to stop Test-Bed operations if interference isreported. This progress report describes the activities related to the Test-Bed pilot programundertaken during Fiscal Year (FY) 2011. Table 1 provides a high level overview of the different DSA implementationsparticipating in the Test-Bed pilot program based on the information provided by theparticipants. III.PHASE I TEST PLAN The Phase I test plan breaks the test cases down into five categories for eachDevice Under Test (DUT): emission characterization, sensor characterization, spectrumaccess behavior, LMR emission characterization, and LMR receiver performancecharacterization. Figure 1 shows an overview of the proposed test cases to be performedunder Phase I. All Phase I testing will be performed at the ITS laboratory.2 Figure 1. IV.STATUS OF PHASE I TESTING NTIA ITS has completed the Phase I laboratory testing of the DSA Device A.The NTIA Office of Spectrum Management (OSM) is preparing a test report for DSADevice A based on the Phase I measurement data. NTIA ITS has completed the Phase I laboratory testing of DSA Device B. DuringFiscal Year 2011, one of the DSA devices failed and was replaced. This necessitatedlimited regression testing of the DSA device to ensure previous test results were valid. NTIA ITS received DSA Device F in October 2010 and has completedapproximately 10 percent of the testing. Testing was discontinued due to technical issueswith the control computers and the spectrum sensing implementation of the DSA device.NTIA returned the DSA devices and control computers to the Test-Bed participant so thatit might resolve these issues. The schedule for resuming Phase I testing of DSA Device Fhas not yet been determined. Test-Bed Participant C provided to NTIA a demonstration of its DSA devices toITS staff members in January 2011 and training on their DSA devices at the NTIA/ITSlaboratory in July 2011. Participant C provided its DSA devices for Phase I testing;however, Participant C determined that it will need to implement software changes to itsdevices before Phase I testing can begin. The schedule for beginning Phase I testing ofDSA Device C has not yet been finalized. Test-Bed Participant D informed NTIA in February 2011 that it would notprovide DSA radios for the Test-Bed, but would instead provide a stand-alone DSAsensor with a selection of algorithms for processing incumbent LMR signals. Test-BedParticipant D is continuing to develop the DSA sensor and algorithms, and is expected toprovide the sensing suite in the second quarter of 2012. NTIA staff has continued to develop analytical capabilities to assess th