I. INTRODUCTION

II. LOW LATENCY SERVICES IN 5G

III. SOURCES OF LATENCY IN A CELLULAR NETWORK

IV. CONSTRAINTS AND APPROACHES FOR ACHIEVING LOW LATENCY

V. RAN SOLUTIONS FOR LOW LATENCY

VI. CORE NETWORK SOLUTIONS FOR LOW LATENCY

VII. CACHING SOLUTIONS FOR LOW LATENCY

VIII. FIELD TESTS, TRIALS AND EXPERIMENTS

IX. OPEN ISSUES, CHALLENGES AND FUTURE RESEARCH DIRECTIONS

X. CONCLUSION