第四工作组最终报告1755 1850mhz点对点微波

Working Group 4:1755-1850 MHzPoint-to-Point MicrowaveTactical Radio Relay (TRR)Joint Tactical Radio System / Software Defined Radio (JTRS/SDR) FINAL REPORTJuly 24, 2013 Table of Contents Executive Summary.......................................................................................... 31Introduction................................................................................................ 52Background................................................................................................. 73Scope of Work, Analysis and Results...................................................... 104Recommendations..................................................................................... 11List of Appendices.......................................................................................... 19Appendix 1: Working Group 4 Participants.............................................. 20Appendix 2: Description of Federal Systems............................................. 24Appendix 3: Commercial Systems.............................................................. 55Appendix 4: Sharing Analyses and Results................................................ 69 Executive Summary This report has been produced as part of the Commerce Spectrum Management AdvisoryCommittee’s (CSMAC) ongoing analysis of ways to facilitate the implementation of commercialwireless broadband in the 1755-1850 MHz band. The systems that Working Group (WG) 4 wasresponsible for assessing were Fixed Point-to-Point, Microwave, Tactical Radio Relay (TRR),and ground-based Joint Tactical Radio Systems (JTRS). The WG decided quickly that the recommendation for Fixed Microwave would be relocation perthe conditions outlined in the National Telecommunications and Information Administration(NTIA) 1755-1850 MHz Assessment Report. This decision was prompted by the outcomes ofthe 1755-1850 MHz evaluation that fixed microwave systems are considered to be relativelyeasy to relocate due to the ready availability of commercial technology to re-establish thesesystems in other frequency bands and the low estimated cost associated with relocating thesesystems, assuming favorable site conditions. With regard to TRR and JTRS, the WG conducted initial analysis using agreed methodology andapproaches for four representative sites each based on analysis of interference into bothDepartment of Defense (DoD) systems and commercial systems. The results of the sharinganalyses conducted thus far indicated that separation distances on the order of hundreds ofkilometers would be necessary to ensure that federal and commercial Long Term Evolution(LTE) systems would not cause harmful interference to each another. Based upon the results ofthese analyses, the WG makes the following recommendations: •Relocate Fixed Point-to-Point Microwave Systems.•Vacate TRR systems from the 1755-1780 MHz band into the 1780-1850 MHz band andinto alternate spectrum.•Transition Plans for TRR systems should be developed with consideration of the list ofEconomic Areas (EAs) ordered according to industry geographic implementationpriorities, noting the exact order in which DoD would be able to relocate or compresswould be based on operational requirements that may vary from the order of commercialpriorities.•Study Protection Zone analysis methodologies for TRR and JTRS with a goal ofimproving the assumptions and approach used in the analysis.•Apply any changes in the analysis methodology to all locations identified as requiringProtection Zones for TRR and JTRS.•Impacted federal agencies will develop Transition Plans for their respective TRR systemsthat address relocation of assignments, compression above 1780 MHz and comparablespectrum.•Develop a sharing approach to permit commercial wireless broadband deployment inProtection Zones for both TRR and JTRS.•Allow TRR systems to remain in the 1755-1850 MHz band in regions where there is littleor no commercial deployment. •Develop a sharing approach to permit the deployment of TRR systems in the 1755-1850MHz band in regions where there is no current or forecasted commercial deployment.•Develop a sharing approach to address point or local area TRR assignments that arereplacements for statewide assignments. A sharing approach is only necessary ifrelocation compression is not feasible.•Develop a method, including a testing program, to demonstrate the viability andeffectiveness of interference protection/mitigation methods proposed by licensees beforecommencing deployments of base stations in any Protection Zones. This effort shouldinclude industry, impacted federal agencies and regulators. The WG notes that while there was general agreement on most recommendations, there were twoareas where DoD and Industry did not fully agree. With respect to the fourth bullet above (Study Protection Zone analysis methodologies for TRRand JTRS with a goal of improving the assumptions and approach used in the analysis), there isdisagreement on the