Cognitive Radio - 802.22

Understanding 802.22 Superframe structure using NetSim Packet Trace log file
Applicable Versions NetSim Standard NetSim Pro   The MAC layer of 802.22 protocol will consist of two structures, namely Frame and Superframe.  Each...
Sat, 7 Mar, 2020 at 12:48 PM
Primary User Emulation attack in Cognitive Radio
Depending on the NetSim version you are using, please click the appropriate link.  For v13.2:
Sun, 19 Mar, 2023 at 11:13 AM
How do secondary users switch channels in NetSim CR ?
The switching to another channel by the secondary user (CR CPE) occurs when the following conditions are satisfied: A primary user comes on and the second...
Mon, 17 Feb, 2020 at 12:32 PM
How is spectrum sensing done in NetSim 802.22 library?
Applicable Versions NetSim Standard NetSim Pro Applicable Releases v12 v13 The NetSim Cognitive Radio library enables spectrum usage det...
Tue, 25 Jul, 2023 at 10:58 AM
What packets does the SU send when it senses PU in 802.22 CR networks?
The Secondary Users (CR CPE) send UCS_Notification(Urgent Coexistence Situation) Packets to the Base Station when they detect the presence of Primary Users ...
Tue, 21 Sep, 2021 at 4:56 PM
Why is it preferred to disable TCP in 802.22 simulations ?
In 802.22 simulations, the secondary stops transmissions when the primary comes on. Since the transmissions are stopped the TCP RTO Expires and window drops...
Wed, 17 May, 2017 at 8:29 AM
Notes on Cognitive Radio implementation in NetSim
Given below are some important points users should keep in mind when running 802.22 cognitive radio simulations CR BS allocates max one symbol per CPE. If...
Thu, 23 Sep, 2021 at 6:07 PM
How is the PHY data rate calculated in 802.22 Cognitive Radio?
Applicable Versions NetSim Academic NetSim Standard NetSim Pro Data rate in 802.22 depends on the following parameters · No. of bits per symbol · Cod...
Thu, 23 Sep, 2021 at 6:12 PM
How I delay the sensing of the primary (incumbent) by the secondary?
Applicable versions NetSim Standard Netsim Pro   Applicable Releases v12 v13 Let us say there is some delay in sensing the primary. This would m...
Thu, 23 Sep, 2021 at 6:15 PM
How to add spectrum sensing time in Cognitive Radio network?
Applicable versions NetSim Standard Netsim Pro   Spectrum sensing is one of the most important components of cognitive radio (CR) technology. The delays...
Thu, 23 Sep, 2021 at 6:20 PM