Coexistence in Wireless Networks: Challenges and System-Level Solutions in the Unlicensed Bands

Cover......Page 1
Half-title......Page 3
Title......Page 5
Copyright......Page 6
Dedication......Page 7
Contents......Page 9
Illustrations......Page 12
Tables......Page 14
Why did I write this book?......Page 15
About the organization of this book......Page 16
Acknowledgments......Page 17
Abbreviations......Page 18
1 Introduction......Page 21
1.1.1 Mathematical modeling......Page 22
1.1.3 Simulation modeling......Page 23
1.2 Interference avoidance and coexistence strategies......Page 24
1.2.2 Fair scheduling and wireless QOS research......Page 25
2.1.1 Communication channel......Page 27
2.1.2 Modulation and filtering......Page 28
2.1.3 Channel propagation properties......Page 29
2.1.5 Spread spectrum......Page 30
Frequency hopping......Page 32
Time division multiple access......Page 33
Frequency division multiple access......Page 34
Code division multiple access......Page 35
Packetization......Page 36
Scheduling......Page 37
Collision resolution......Page 38
Error detection and correction......Page 40
2.2.3 Key design factors......Page 42
2.3.1 Bluetooth......Page 43
2.3.2 IEEE 802.11b......Page 47
3 Interference performance evaluation......Page 50
3.1 Interference model......Page 51
3.2.1 PHY layer performance measures......Page 52
3.2.2 Higher layer performance measures......Page 54
3.3 Factors affecting performance......Page 55
3.3.3 Traffic characteristics: offered load and packet size......Page 57
3.3.4 Transmission power......Page 60
3.3.5 Number of systems......Page 62
4.1 Theoretical BER estimation......Page 63
4.2 Modeling BER in wireless channels......Page 67
4.3 Packet error model......Page 69
4.3.1 Case study: packet error model for Bluetooth with IEEE 802.11b interference......Page 72
5.1 Usage definition......Page 74
5.2 Application models......Page 75
5.2.1 Bulk data......Page 76
5.2.2 Application profiles......Page 77
5.2.3 Traffic traces......Page 78
5.3 Network topology......Page 80
5.4 Channel model......Page 82
5.5.1 MAC layer modeling......Page 83
5.5.2 PHY layer modeling......Page 85
5.5.3 Packet and signal processing simulation models interface......Page 86
5.6 Simulation speed-up......Page 87
5.7 Case study: evaluating IEEE 802.11 and Bluetooth interference......Page 88
5.8 Comparing the simulation results with the analysis......Page 91
6 Channel estimation and selection......Page 96
6.1.2 Higher layer measurements......Page 97
6.2 Adaptive measurements......Page 98
6.2.1 Time average......Page 99
6.2.2 Combining measurements......Page 100
6.2.3 Thresholding techniques......Page 102
6.3.1 Channel classification......Page 103
6.3.2 Channel estimation feedback......Page 104
Estimation window......Page 105
Estimation interval......Page 106
7 Effective coexistence strategies......Page 108
7.1 Knowledge of interference patterns......Page 109
7.2 Time division multiple access......Page 110
7.2.1 Fairness......Page 111
7.2.2 QOS support considerations......Page 112
7.2.3 Case study: Bluetooth interference aware scheduling (BIAS)......Page 113
Credit allocation......Page 114
7.2.4 Service priority......Page 115
Performance evaluation results......Page 118
7.3 Frequency division multiple access......Page 123
7.3.1 Space partitioning......Page 124
7.3.2 Time partitioning......Page 125
7.3.3 Case study: adaptive frequency hopping for Bluetooth systems......Page 126
Performance evaluation results......Page 128
7.4 Handovers......Page 134
7.4.1 Handover types......Page 135
7.4.2 Handover architecture......Page 136
8 Myths and common pitfalls......Page 137
8.1 Power control......Page 138
8.1.1 Implementing PC in Bluetooth......Page 140
8.1.2 Lessons learned......Page 144
8.2 Modulation control......Page 145
8.2.1 Modulation control strategy in WLAN......Page 146
8.2.2 Lessons learned......Page 151
8.3.1 Effects of packet fragmentation......Page 152
8.3.2 Effects of forward error correction......Page 155
8.3.3 Lessons learned......Page 157
Standard specifications......Page 158
Standard group contributions......Page 159
Journal and conference articles......Page 160
Books......Page 162
Index......Page 163