The first international standard in Cognitive Radio Networks is IEEE 808.22 Wireless Regional Area Networks, which uses unused TV spectrum to provide Broadband access to rural areas. This slides describes how Channel management is done in WRAN Systems.

1. Cognitive Radio Networks Praseetha KR

2. Channel management in IEEE 802.22 WRAN Systems

4. Channel management in IEEE 802.22 WRAN Systems

5. Channel management in IEEE 802.22 WRAN Systems

6. Full Cognitive Radio (Every possible observable parameter) Spectrum Sensing Cognitive Radio (only RF spectrum) Licensed Band Cognitive Radio e g: IEEE 802.22 WRAN which will operate in unused television channels Unlicensed Band Cognitive Radio eg: IEEE 802.15 Task group 2 specification which focuses on the coexistence of IEEE 802.11 and Bluetooth Depending on the parts of the spectrum available Depending on the set of parameters Channel management in IEEE 802.22 WRAN Systems

9. Channel management in IEEE 802.22 WRAN Systems

10. Channel management in IEEE 802.22 WRAN Systems

11. Channel management in IEEE 802.22 WRAN Systems

16. Channel management in IEEE 802.22 WRAN Systems Channel management in IEEE 802.22 WRAN Systems

21. Channel classification start Incumbent DB exist? Available channels Is channel sensed? Decision considerations: -Empty or not -own WRAN cell used -WMP used -TV used -Other WRAN cells used -Cumulative empty time -History -Local regulatory end Disallowed Operating Backup Candidate Protected Unclassified Unavailable channels Incumbent protection requirements Channel availability? No No No Yes Yes Yes SM Incumbent db Channel Classification Procedure

22. Protected Operating Backup Candidate Disallowed Unclassified channels in which incumbent users or WRAN operations has been detected The channel currently in operation for WRAN channels that have been cleared to become the operating channel channels that are candidates to become a backup channel Channels precluded by the operator due to operational or local regulatory constraints Channels that have not yet been sensed Infrequent Every 2s Every 6s Infrequent Channels Characteristics Re-sensing time interval Channel management in IEEE 802.22 WRAN Systems

26. Channel management in IEEE 802.22 WRAN Systems

27. Channel management in IEEE 802.22 WRAN Systems