DIMSUMNet: New Directions in Wireless Networking Using Coordinated Dynamic Spectrum Access
WOWMOM '05 Proceedings of the Sixth IEEE International Symposium on World of Wireless Mobile and Multimedia Networks
Comparison of multi-channel MAC protocols
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
A Distributed Protocol for Dynamic Address Assignment in Mobile Ad Hoc Networks
IEEE Transactions on Mobile Computing
Mobile Networks and Applications
Proceedings of first ACM/IEEE international workshop on Mobility in the evolving internet architecture
Guest editorial: special issue on cognitive radio oriented wireless networks and communications
Mobile Networks and Applications
What and how much to gain by spectrum agility?
IEEE Journal on Selected Areas in Communications
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IEEE Network: The Magazine of Global Internetworking
A Learning Automata-Based Cognitive Radio for Clustered Wireless Ad-Hoc Networks
Journal of Network and Systems Management
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Wireless Personal Communications: An International Journal
Secure Distributed Routing Algorithm with Optimizing Energy Consumption for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
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This paper presents an integrated view of cognitive radio technologies for efficient wireless services in dense spectrum environments. The rationale for cognitive radio based systems is discussed, leading to an identification of the available design space that ranges from reactive interference avoidance to spectrum etiquette and eventually network collaboration. After reviewing prior work in the dynamic spectrum area, a specific distributed spectrum etiquette protocol called ''common spectrum coordination channel (CSCC)'' is introduced. Performance gains achieved with CSCC relative to simpler reactive time/frequency/power control algorithms are evaluated for example in WiFi/Bluetooth and WiFi/WiMax co-existence scenarios. The next level of system performance can be achieved through opportunistic collaboration between radios to form ad hoc multi-hop networks in which neighboring nodes associate with each other at high bit-rate and low power. Adaptive wireless networks of this type will require new protocol architectures which integrate flexible PHY/MAC and cross-layer capabilities with ad hoc network discovery and multi-hop routing. A specific ''CogNet'' protocol architecture based on the concept of a ''global control plane (GCP)'' is described. Major CogNet protocol modules for bootstrapping, discovery, data path setup and naming/addressing are outlined, and representative ns-2 simulation results are provided for validation. In conclusion, the paper gives a preview of the network-centric WiNC2R prototype under development at WINLAB as an experimental cognitive radio platform.