Preface; Contents; Acronyms; 1 Introduction; 1.1 Motivation; 1.2 Resource Allocation Under Delay Constraints; 1.3 Structure of the Brief; References; 2 Power Allocation Over Fading Channels Under Delay Constraints: A Review; 2.1 Average Delay Constraint; 2.2 Delay-Outage Constraint; 2.2.1 Asymptotic Delay Analysis; 2.2.2 Effective Capacity; 2.2.3 EC-Based Resource Allocation and Performance Analysis; 2.3 Energy Harvesting Communications Systems; 2.4 Buffer-Aided Relaying Communications; 2.4.1 Half-Duplex Relaying with Adaptive Link Selection; 2.4.1.1 Case of Unconstrained Delay

2.4.1.2 Case of Average Delay Constraint2.4.2 Full-Duplex Relaying; References; 3 Joint Data Admission Control and Power Allocation Over Fading Channel Under Average Delay Constraint; 3.1 System Model and Problem Formulation; 3.1.1 Model Description; 3.1.2 Problem Formulation; 3.1.3 Optimal Throughput-Delay Trade-Off; 3.2 Joint Data Admission Control-Power Allocation; 3.2.1 MDP-Based Optimal Solution; 3.2.2 Post-decision State-Value Function Approach; 3.2.3 Structural Results; 3.2.4 Online Algorithm; 3.3 Illustrative Results; 3.3.1 Settings; 3.3.2 Numerical Results; References

4 Power Allocation with Energy Harvesting Over Fading Channel Under Statistical Delay Constraints4.1 System Model and Problem Formulations; 4.1.1 Model Description; 4.1.2 Problem Formulations; 4.2 Power Allocation Under Average Delay Constraint ; 4.2.1 Optimal Allocation Solution ; 4.2.2 Online Algorithm; 4.2.3 Baseline Transmission Schemes; 4.3 Power Allocation Under Delay-Outage Constraint ; 4.3.1 Effective Capacity Maximization ; 4.3.1.1 Post-decision State-Value Function Approach ; 4.3.2 Online Algorithm ; 4.3.3 Baseline Transmission Schemes; 4.4 Illustrative Results

4.4.1 Average Delay Constraint4.4.2 Delay-Outage Constraint; 4.4.3 Average Delay Versus Delay-Outage Constraints; 4.4.4 Convergence Study of the Online Algorithms; References; 5 Resource Allocation for Buffer-Aided Half-Duplex Relaying Under Delay-Outage Constraint; 5.1 System Model and Problem Formulation; 5.1.1 Model Description; 5.1.2 Problem Formulation; 5.2 Delay-Outage Constraint Transformation; 5.2.1 Asymptotic Delay Analysis for Buffer-Aided Relaying Network; 5.2.2 Delay-Outage Constraint Transformation; 5.3 Adaptive Link Scheduling with Fixed Power Allocation; 5.3.1 Optimal Solution

5.3.2 Special Cases5.3.2.1 Case of Very Loose Delay Constraints; 5.3.2.2 Case of Very Stringent Delay Constraints; 5.3.2.3 Case of Negligible Fading Variation; 5.3.2.4 Case of Similar Link Fading Distributions; 5.3.2.5 Rayleigh Fading Links; 5.3.2.6 Illustration; 5.3.3 Comparison Benchmarks; 5.3.3.1 QoS-Aware B-HD-FLS; 5.3.3.2 QoS-Blind B-HD-ALS; 5.3.3.3 Non-buffer Relaying; 5.4 Adaptive Link Scheduling with Adaptive Power Allocation; 5.4.1 Optimal Solution; 5.4.2 Special Cases; 5.4.2.1 Case of Very Loose Delay Constraints; 5.4.2.2 Case of Very Stringent Delay Constraints