报告频谱清单工作组

Commerce Spectrum Management Advisory Committee Michael CalabreseMarty CooperMark CrosbyGary EpsteinRobert GurssMark McHenryDarrin MyletJennifer Warren May 19, 2010 Table of Contents Introduction...3Working Group Advice...3Questions and Answers...5Background Information...8Funding...9Future Considerations... 10Conclusion... 10Appendix A–Spectrum Inventory Elements... 11Appendix B–Use of Spectrum Measurements... 13 Spectrum Inventory Working GroupCommerce Spectrum Management Advisory Committee Introduction The demand for new telecommunications spectrum is increasing exponentially, and this growth isexpected tocontinue indefinitely.Anysolution to spectrum scarcity that relies alone on theredistribution of a fixed amount of spectrum is, in the long term, a strategy that will not succeed.Ultimately, most services will continue to experience increased demand, and pitting one service againstanother will become a zero-sum game.The purpose of an inventory should be to add to the policymaker’stoolkit in efforts to enable and promote more intensive use of existing allocations andassignments, rather than solely for the reallocation or repurposing of spectrum.Even if some spectrumis repurposed, industry or government users should be encouraged to deploy known and provenmethods for increasing spectral efficiency or effectiveness of use.For example, data compression,smart antenna, MIMO, and new emerging sharing technologies will allow existing spectrum holders toenhance spectrum capacity and manage growth without the need for additional spectrum assets. Insome cases, these techniques may create new spectrum access opportunities, if spectrum sharing isproven to be technically feasible and does not undercut a spectrum holder’s ability to manage futuregrowth.Spectrum gained through such capabilities is an important long-term, sustainable solution tofulfilling exponential spectrum demand by existing holders and, in some instances, new services. In addition to this overriding point and the other suggestions that follow in this paper, the SpectrumInventory Working Group nevertheless agrees that there are substantial benefits that would result fromthe creation of an automated and accessible Spectrum Inventory.The FCC previously soughtinformation in its initial Notice of Inquiry (NOI) on the National Broadband Plan,1and commentersresponded positively to the NOI’s questions on whether and how the Commission should conduct a“spectrum census” or “spectrum inventory”2. Working Group Advice The Commerce Spectrum Management Advisory Committee (CSMAC) Spectrum Inventory WorkingGroup (SIWG) has been tasked with answering a number of questions that will provide policy advice toNTIA regarding the development of a Spectrum Inventory.These questions are addressed below. Inaddition, the working group has the following general comments regarding the two pending SpectrumInventory bills. (For background on the Spectrum Inventory Acts, please see the end of this document.) Carrier, public safety and business enterprise demand for spectrum for land mobile services in heavilypopulated areas is increasing rapidly. Furthermore, the mobile wireless industry has articulated a needfor additional spectrum to support broadband wireless services, while the Federal Government has alsoarticulated increasing demand for bandwidth intensive capabilities (e.g., UAV, radar), both civil and military.The plans to review both federal and non-federal spectrum holdings may provide a betterunderstanding of the possible options to address these needs. Potential results may include: Redistribution of existing spectrum assignments from entities that are not using their entirespectrum;Encouragement of capacity-enhancing techniques for existing spectrum holders to permit themto manage future growth and curtail the need for additional spectrum assets;Introduction of spectrum sharing technologies in specific frequency bands so that underusedspectrum can be shared between compatible, non-interfering uses in those cases where sharingis determined to be technically feasible and where it will not undercut the existing spectrumholder’s ability to manage future growth. Concerning the first approach, we respectfully suggest that the fundamental precept of redistributionneeds to be challenged. Redistribution is not the only option for the long-term need for spectrum. Theeffective size of the spectrum is not fixed and unchanging.There has been a continual growth in theneed for spectrum since radio technology was created more than 100 years ago. As new services havecreated new demands for spectrum, technology has increased the capacity of the spectrum toaccommodatethese new demands.Particularly in the context of fixed and mobile wirelesscommunications, technological innovation allows capacity to stay ahead of demand by enabling greateruse of the same amount of assigned spectrum at a faster rate than the assigned spectrum becamecongested. For example, when cellular co