I. INTRODUCTION

II. FRAMEWORKS

III. OPEN-SOURCE-DEFINED CORE NETWORK

IV. OPEN-SOURCE-DEFINED RADIO ACCESS NETWORK

V. OPEN-SOURCE MULTI-ACCESS EDGE COMPUTING

VI. SECURITY CHALLENGES, CURRENT AND FUTURE EVOLUTION

VII. OPEN-SOURCE HARDWARE

VIII. TESTBEDS FOR OPEN-SOURCE-DEFINED WIRELESS NETWORK

IX. LESSONS LEARNED

X. OPEN RESEARCH ISSUE AND FUTURE RESEARCH DIRECTION

XI. CONCLUSION