Title Page
Contents
ABSTRACT 10
국문초록 11
CHAPTER 1. INTRODUCTION 12
CHAPTER 2. SYSTEM AND PROBLEM STATEMENT 16
2.1. System overview 16
2.2. System model 16
2.3. Delay model 17
2.3.1. Delay of computation 17
2.3.2. Delay of transmission 18
2.3.3. Delay of queuing 19
2.4. Energy consumption model 20
2.4.1. Energy consumption of computation 20
2.4.2. Energy for transmission and reception 21
2.5. Energy - Delay cost 21
2.5.1. First case - on device 22
2.5.2. Second case - local server 22
2.5.3. Third case - remote server 23
2.6. Problem formulation 24
CHAPTER 3. METHODOLOGY 26
3.1. Markov Decision Process 26
3.2. DDPG - PER framework 28
CHAPTER 4. EXPERIMENTS 31
4.1. Simulation requirement 31
4.2. Simulation setting 31
4.3. Testing cases 32
4.3.1. Delay performance comparison 33
4.3.2. Energy performance comparison 34
4.3.3. Energy - Delay cost performance comparison 35
CHAPTER 5. CONCLUSION 38
REFERENCES 39
[Table 4-1] Setting parameters. 32
[Table 4-2] Average of delays (s) 34
[Table 4-3] Average energy performance (J) 35
[Table 4-4] Average Energy - Delay cost 36
[Figure 1-1] The IIoT-enabled MEC system. 13
[Figure 2-1] The MEC-based IIoT system architecture. 16
[Figure 3-2] The DDPG-PER framework. 29