TABLE OF CONTENTS
| Executive Summary | 2 | |
| CHAPTER 1: 5G HISTORY AND OVERVIEW | 5 | |
| A History of Generation Technology | 5 | |
| History’s Lessons: First-Mover Advantage in Generation Transitions | 6 | |
| Spectrum Use and Options | 8 | |
| Millimeter Wave (mmWave) | 8 | |
| Sub-6 | 10 | |
| CHAPTER 2: CURRENT STATE OF THE 5G COMPETITIVE FIELD | 12 | |
| China | 12 | |
| South Korea | 13 | |
| Japan | 14 | |
| Rest of World (Non-US) | 15 | |
| United States | 16 | |
| Private Sector | 16 | |
| Public Sector: White House | 18 | |
| Public Sector: FCC | 18 | |
| Public Sector: Department of Commerce | 19 | |
| CHAPTER 3: DoD DEVELOPMENT AND ADOPTION OF 5G TECHNOLOGY | 21 | |
| 5G Impact on DoD | 21 | |
| Pivot to Sub-6 GHz | 21 | |
| A Path Forward for Sub-6 Spectrum Sharing | 22 | |
| Security Challenges in 5G | 23 | |
| Supply Chain Risks | 23 | |
| 5G Infrastructure and Services | 24 | |
| 5G Devices | 25 | |
| CHAPTER 4: BOARD RECOMMENDATIONS FOR 5G | 27 | |
| Board Recommendations | 27 | |
| Recommendation #1 | 27 | |
| Recommendation #2 | 28 | |
| Recommendation #3 | 30 | |
| Recommendation #4 | 31 | |
DIB 5G Study
Preliminary Release, 3 April 2019
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