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Herlich, Matthias: Reducing energy consumption of radio access networks. 2014
Inhalt
List of acronyms
List of symbols
List of figures
List of tables
Introduction
Radio access networks
Load, energy consumption, and latency
Power profiles
Energy-latency trade-off
Consumption vs. efficiency
Splitting signaling and data traffic
Cooperative transmissions
General related work
Energy consumption on the BS level
Other wireless techniques
Energy consumption on the network level
Prediction
Moving and reducing load
Effects on the power grid
Contributions and chapter overview
Conserving energy at each BS individually
Introduction
Related work
Model
Queuing system
Server states and timing
Policies and metrics
Poisson arrivals
Greedy policy
Accumulate & fire policy
Energy-minimizing policy
Latency-minimizing policy
Comparison
Adversary-controlled arrivals
Latency ratio: greedy policy
Latency ratio: accumulate & fire policy
Energy ratio: greedy policy
Energy ratio: accumulate & fire policy
Impossible trade-offs between energy and latency
Arbitrarily distributed random variables
Results
Conclusion
Conserving energy by coordinating sleep modes network-wide
Introduction
Related work
Model
Network graph
Power consumption
Latency
Analysis of metrics for latency aggregation
Relationships between the latency metrics
Bandwidth-delay product and latency
Optimization model
Results
Conclusion
Conserving energy in signaling transmissions
Introduction
Related work
Model
Non-cooperative range
Cooperative range
Signaling with optimal BS spacing
No cooperation
Limited 2-cooperation
Unlimited 2-cooperation
Infinite cooperation
Results
Deactivating opportunities with fixed BS spacing
Comparing ergodic and outage capacity
Conclusion
Conserving energy in data transmissions
Introduction
Related work
Model
Cooperation
Metrics
Analysis
No cooperation
Cooperation with densely placed BSs
Cooperation with sparsely placed BSs
Numerical results
Conclusion
Radiated power
Introduction
Related work
Model
Effective radiated power
Static vs. dynamic association
Outage probability
Static association
Dynamic association
Strictly superior cooperation schemes
Effective radiated power
Static association
Dynamic association
Results
Scenarios with high gain
Outage probability and channel gain
Effective radiated power
Relating ERP and outage probability
Conclusion
Network simulation
Introduction
Related work
Model
BS deployment
UE deployment and load generation
Radio model
Power model
Cooperative diversity
Algorithms
Always on and always off
Greedy and accumulate & fire
Set cover
Results
Conclusion
Final thoughts
Summary
Future work
Conclusion
Proofs for the stretch metrics
Equality of stretch metrics for the geometric mean
Possible orders of metrics
Impossible orders
Bounds between metrics
Maximum of stretches
Stretch of maximum
Stretch of average
Average of stretches
Geometric mean of stretches
Latency in rings
Limit in odd-length rings
Limit in even-length rings
Bibliography
Glossary
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