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
We have file exchange project for PUEA in CR Networks For v12.1: https://tetcos.com/pdf/v12.1/Primary_User_Emulation_(PUE)_Attack_v12.1.pdf For v12.0:...
Sat, 11 Apr, 2020 at 11:11 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?
NetSim Cognitive Radio library detects spectrum usage based on whether the primary user (incumbent) is inside / outside the keep out distance from the se...
Sat, 30 Mar, 2019 at 11:18 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 ...
Fri, 31 Mar, 2017 at 11:29 AM
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...
Sat, 11 Apr, 2020 at 11:15 AM
How is the PHY data rate calculated in 802.22 Cognitive Radio?
Data rate in 802.22 depends on the following parameters · No. of bits per symbol · Coding rate · Cyclic prefix · Symbol duration Data rate i...
Wed, 1 Nov, 2017 at 12:22 PM
How I delay the sensing of the primary (incumbent) by the secondary?
Applicable versions NetSim Standard Netsim Pro   Let us say there is some delay in sensing the primary. This would mean that there is a delay in sendin...
Thu, 16 Apr, 2020 at 4:34 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 delay...
Thu, 16 Apr, 2020 at 4:36 PM