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SAFIRE: Reliable and Efficient Dynamic Spectrum
Management
---Lili Cao,
Lei Yang, Prof. Heather Zheng
SAFIRE is a robust architecture for dynamic spectrum access that provides reliable and efficient spectrum access across wireless networks of various scales. Only if the reliability of dynamic spectrum access is improved, can major wireless networks adopt this new model and provide usable spectrum to innovative wireless technologies and services.
SAFIRE achieves reliability by statistically regulating spectrum demand to proactively avoid congestion, by applying distributed coordination and cross-layer interactions to quickly adapt spectrum usage to network and spectrum dynamics, while utilizing spectrum efficiently.
SAFIRE consists of two components: SPARTA (proactive regulation) and ADAPT (reactive adaptation).
SAFIRE: Reliable and Efficient Dynamic Spectrum
Management
---Lili Cao,
Lei Yang, Prof. Heather Zheng
SAFIRE is a robust architecture for dynamic spectrum access that provides reliable and efficient spectrum access across wireless networks of various scales. Only if the reliability of dynamic spectrum access is improved, can major wireless networks adopt this new model and provide usable spectrum to innovative wireless technologies and services.
SAFIRE achieves reliability by statistically regulating spectrum demand to proactively avoid congestion, by applying distributed coordination and cross-layer interactions to quickly adapt spectrum usage to network and spectrum dynamics, while utilizing spectrum efficiently.
SAFIRE consists of two components: SPARTA (proactive regulation) and ADAPT (reactive adaptation).
- SPARTA (See our INFOCOM 08 paper) applies interference-aware statistical admission control to regulate spectrum demand subjecting to a predefined QoS factor. We apply the concept of effective-rate in the context of interference constraints.
- ADAPT (See our SECON05, DySPAN05, Crowncom07, MONET08, JSAC08, WICON08 papers) applies local coordinations to quickly tune network wide spectrum allocation to network dynamics. We have developed both algorithms and protocols for ADAPT and are working on implementing ADAPT using experimental testbeds.
- We have developed both explicit coordination approach (SECON05, MONET08) and rule-based independent adjustment (DySPAN05, JSAC08) approach.
- We have developed a fast traffic-aware coordination protocol and verified its performance using Qualnet simulations (WICON08).
- NEW! SAFIRE over PHY Interference Models -- While initial designs of SPARTA and ADAPT assume conflict-graph based interference models, our recent work PLAN (See our DySPAN 08 paper) provides a tool that generates optimized conflict graphs from physical interference models so that one can apply well-developed graph-based spectrum allocation solutions on top of various practical physical interference models.