Simulation of 802.22 Cognitive Radio Networks with NetSim

IEEE 802.22 Wireless Regional Area Networks (WRANs) are designed to provide broadband access to data networks. The WRAN systems will use vacant channels in the VHF and UHF bands allocated to the Television Broadcasting Service in the frequency range between 54 MHz and 862 MHz while avoiding interference to the broadcast incumbents in these bands.

NetSim v7, expected to be released in April, covers simulation of 802.22 WRAN based cognitive radio networks featuring: MAC layer model containing Super frame, DS-MAP, US-MAP, BW request, Quiet period and Normal mode operation

  1. PHY layer operating through OFDMA.
  2. CR Base station with interfaces to connect with Switch or Router and CPE’s  with a Max 512 CPE’s in each BS
  3. UGS, nrtPS, rtPS and BE QoS classes
  4. Incumbent model, Incumbent detection and channel switching
  5. Connection establishment via CID consisting of a 9-bit station ID (SID) and a 3-bit flow ID (FID).
  6. The cognitive plane consisting of Spectrum Manager, Spectrum Sensing Function, Spectrum Sensing Automaton, Channel Model.


802.22 Primitives with source C Code
The following protocol functionalities are available with source C code for extending existing algorithms: Transmit_SCH, Transmit_FCH, Transmit_DS_MAP, Transmit_US_MAP, Request_BW, Access_Phy_OFDMA, Spectrum_Manager, Spectrum_Sensing_Fn, Spectrum_Sensing_Automation, apart from various Channel_models

Metrics
Network metrics such as Network Throughput, Packet Delay plus CR specific metrics such as throughputs for each QoS class, incumbent detection rate, channel switching rate etc are available.
Packet Trace & Event Trace for CR simulations are also available for performance validation, statistical analysis and custom code de-bugging.