Energy-Efficient Spectrum Management for Cognitive Radio Sensor Networks (eBook)

Preface 6
Acknowledgements 8
Contents 9
Acronyms 12
1 Introduction 13
1.1 Background 13
1.1.1 Wireless Sensor Networks 13
1.1.2 Cognitive Radio 15
1.1.3 Cognitive Radio Sensor Networks 16
1.1.3.1 A Typical Architecture of CRSN 16
1.1.3.2 Benefits of CRSN 17
1.2 Applications and Challenges of CRSN 19
1.2.1 CRSN Applications 19
1.2.1.1 E-Healthcare Applications 19
1.2.1.2 Smart City Applications 19
1.2.1.3 Indoor Surveillance and Localization Applications 20
1.2.1.4 Multimedia Applications 20
1.2.2 Arisen Challenges for CRSNs 20
1.3 Aim and Outline of This Book 22
References 24
2 Spectrum Resource Management for CRSNs 26
2.1 Dynamic Spectrum Access Decision 26
2.2 Secure Collaborative Spectrum Sensing 27
2.3 Joint Energy Management and Spectrum Resource Allocation 29
2.4 Summary 30
References 31
3 Dynamic and Energy-Efficient Channel Access in Clustered CRSNs 34
3.1 System Model and Objective Statement 35
3.1.1 Network Model 35
3.1.2 Cognitive Radio Model 36
3.1.3 Energy Consumption Model 38
3.1.4 Objective Statement 39
3.2 Dynamic Channel Access for Intra-Cluster Data Transmission 41
3.2.1 Energy Consumption Analysis 41
3.2.2 Optimal Transmission Time Allocation 42
3.2.3 Analysis of Channel Sensing and Switching Decision 44
3.2.4 Dynamic Channel Sensing and Accessing Scheme 46
3.3 Joint Power Allocation and Channel Access for Inter-Cluster Data Transmission 46
3.3.1 Analysis of Channel Sensing and Switching Decision 47
3.3.2 Joint Transmission Power and Time Allocation 50
3.3.2.1 Optimization of Transmission Power Px* Under Given tx 51
3.3.2.2 Optimization of Transmission Time tx* Under Given Px* 52
3.3.3 Joint Power Allocation and Channel Accessing Scheme 53
3.4 Performance Evaluation 54
3.4.1 Simulation Settings 54
3.4.2 Performance of Intra-Cluster Data Transmission 55
3.4.3 Performance of Inter-Cluster Data Transmission 56
3.4.4 Impacts of System Parameters 58
3.5 Summary 59
References 60
4 Secure and Energy-Efficient Collaborative Spectrum Sensing 62
4.1 System Model and Design Goals 64
4.1.1 Network Model 64
4.1.2 Channel Sensing Model and Decision Rule 65
4.1.3 Attack Model 66
4.1.3.1 Independent SSDF (I-SSDF) Attack 67
4.1.3.2 Collaborative SSDF (C-SSDF) Attack 67
4.1.4 Energy Consumption Model 68
4.1.5 Design Goals 69
4.2 Analysis on Trade-Off Between Security and Energy-Efficiency 69
4.2.1 Attack Impact Analysis 70
4.2.2 Security and Energy-Efficiency Trade-Off 72
4.3 FastDtec: Trust Evaluation for Fast Compromised Node Identification 74
4.3.1 Trust Evaluation Design 74
4.3.2 Analysis on Optimal Detection Threshold 76
4.3.3 The Proposed FastDtec Scheme 79
4.4 Secure and Energy-Efficient Collaborative Spectrum Sensing 80
4.4.1 The Proposed Scheme 80
4.4.2 Further Discussion 80
4.5 Performance Evaluation 82
4.5.1 Simulation Settings 82
4.5.2 Attack Impacts Evaluation 84
4.5.3 Performance of the Proposed Scheme 88
4.6 Summary 88
References 89
5 Joint Channel Allocation and Sampling Rate Control in EH-CRSNs 91
5.1 System Model and Problem Formulation 92
5.1.1 Network Model 92
5.1.2 Communication Link Model 95
5.1.3 Energy Harvesting and Consumption Model 95
5.1.4 Channel Interference Model 96
5.1.5 Problem Formulation 97
5.2 Problem Decomposition and Solution 98
5.2.1 Problem Decomposition and Dual Problem 98
5.2.2 Subgradient Method for Solving Dual Problem 101
5.3 Subproblem Solutions 101
5.3.1 Optimal Solution for Sampling Rate Control 101
5.3.2 Computation Complexity Analysis on Channel Allocation 102
5.3.3 Suboptimal Solution for Channel Allocation 105
5.4 JASC: Joint Channel Allocation and Sampling Rate Control Scheme 107
5.4.1 Algorithm for Solving Primal Problem 107
5.4.2 The Proposed JASC Scheme 108
5.5 Performance Evaluation 109
5.5.1 Utility Comparison and Efficiency Evaluation 110
5.5.2 Channel Allocation and Interference Evaluation 112
5.5.3 Impacts of System Parameters 113
5.6 Summary 114
References 115
6 Concluding Remarks and Future Directions 117
6.1 Concluding Remarks 117
6.2 Future Research and Development Directions 118
6.2.1 Distributed Spectrum Resource Management for Large-Scale CRSNs 118
6.2.2 Cross-Layer Design for Opportunistic Spectrum Access 119
6.2.3 RF Energy Harvesting and Transfer in CRSNs 119
References 120