Three-Tier Shared Spectrum, Shared Infrastructure, and a Path to 5G

Preston Marshall led the Google and Alphabet Inc. efforts to establish the technical, commercial, and regulatory ecosystem to make three-tier spectrum a success in the USA. He was a major participant in the USA PCAST study that was the basis of the three-tier concept. He chairs the Wireless Innovation Forum Spectrum Sharing Committee, and is founding vice chair of the CBRS Alliance. Previously he was Deputy Director of the Information Sciences Institute (ISI) at the University of Southern California (USC), Research Professor at USC's Electrical Engineering Department, and Program Manager for wireless, cognitive radio, and networking programs at the US Defense Advanced Research Projects Agency (DARPA).

Part I. Spectrum Sharing Background: 1. Introduction to three tier spectrum sharing; 2. Prior dynamic spectrum sharing regimes; Part II. Three Tier Dynamic Spectrum Models: 3. Key aspects of PCAST recommendations; 4. US FCC CBRS regulations, and other international activity; Part III. Components of a Three Tier Architecture: 5. Three tier spectrum admission control systems; 6. Admission control management of access point devices and their clients; 7. Taxonomy of protection methods to be provided across and within tiers; Part IV. Protection Processes for Incumbents and Peers: 8. General process for database system operation; 9. Protection of incumbent satellite operations; 10. Protection to and from terrestrial access points and point-to-point networks; 11. Protection to and from radar systems; 12. Coexistence between unprotected peer devices; Part V. Example Use of Three Tier Spectrum: 13. Device and network interaction with the spectrum access system; 14. CBRS SAS requirements; Part IV. Future Bands, Network Services, Business Models, and Technology: 15. Potential services and business models enabled by three tier spectrum; 16. Candidate incumbent bands for three tier spectrum sharing; 17. From shared spectrum, to shared infrastructure, to a new model of 5G; 18. Future actions to deploy more three tier spectrum bands and nations; 19. Alternatives to three tier operation; 20. Conclusions and a look ahead; Part VII. Appendices: Appendix A. Terms and acronyms; Appendix B. Symbols; Appendix C. Opportunity cost model of spectrum utilization.