Alternative to ApskRadioMedium

[n-jay]

Hi all,
I'm working on simulating a sensor network based on the IEEE 802.15.4 standard and having trouble getting nodes to receive packets. To elaborate further, when I set a debug point within the processMessage method of my routing protocol, it is not getting activated.

The transmission media parameters of my ini file are as follows:

*.radioMedium.typename = "Ieee802154NarrowbandScalarRadioMedium"
*.radioMedium.backgroundNoise.power = -100dBm
*.radioMedium.mediumLimitCache.centerFrequency = 2GHz

**.constraintAreaMinX = 1m				
**.constraintAreaMaxX = 100m				
**.constraintAreaMinY = 1m				
**.constraintAreaMaxY = 100m				

*.host*.wlan[0].typename = "Ieee802154NarrowbandInterface"
*.host*.wlan[0].radio.typename = "ApskScalarRadio"
*.host*.wlan[0].radio.centerFrequency = 2.5GHz				
*.host*.wlan[0].radio.bandwidth = 2MHz
*.host*.wlan[0].radio.transmitter.power = 60.5mW 			
*.host*.wlan[0].radio.transmitter.preambleDuration = 192us	
*.host*.wlan[0].radio.transmitter.headerLength = 6B			
*.host*.wlan[0].radio.receiver.sensitivity = -98dBm 
*.host*.wlan[0].radio.receiver.energyDetection = -85dBm
*.host*.wlan[0].radio.receiver.snirThreshold = 4dB 
*.host*.wlan[0].radio.displayCommunicationRange = true


*.baseStation.wlan[0].typename = "Ieee802154NarrowbandInterface"
*.baseStation.wlan[0].radio.typename = "ApskScalarRadio"
*.baseStation.wlan[0].radio.centerFrequency = 2.5GHz				
*.baseStation.wlan[0].radio.bandwidth = 2MHz
*.baseStation.wlan[0].radio.transmitter.power = 60.5mW		
*.baseStation.wlan[0].radio.transmitter.preambleDuration = 192us	
*.baseStation.wlan[0].radio.transmitter.headerLength = 6B
*.baseStation.wlan[0].radio.receiver.sensitivity = -98dBm
*.baseStation.wlan[0].radio.receiver.energyDetection = -85dBm
*.baseStation.wlan[0].radio.receiver.snirThreshold = 4dB
*.baseStation.wlan[0].radio.displayCommunicationRange = true

*.host*.**.bitrate = 250kbps								
*.baseStation.**.bitrate = 250kbps							

I have not set any pathloss algorithms.

For more context, the submodules in my NED file are as follows:

    submodules:
        configurator: Ipv4NetworkConfigurator {
            @display("p=100,100");
        }
        radioMedium: <default("UnitDiskRadioMedium")> like IRadioMedium {
            @display("p=100,100");
        }
        physicalEnvironment: PhysicalEnvironment {
            @display("p=100,100");
        }
        host[numNodes]: <default("WirelessHost")> like INetworkNode {
            @display("i=misc/sensor2");
        }
        baseStation: <default("WirelessHost")> like INetworkNode {
            @display("p=50,50;i=misc/sensorgateway");
        }

I'm quite certain this issue is not stemming from my routing protocol code as the exact same code ran successfully in INET 4.2.5 (on OMNET v5) but with the difference of the radio medium in the ini file being ApskScalarRadioMedium. Since this module seems to have been deprecated in the latest releases of INET I opted to use the Ieee802154NarrowbandScalarRadioMedium as shown above assuming it should work fine.
Since this is the only difference, I'm fairly confident it's the cause of this issue.

Would really appreciate some thoughts on this, perhaps an alternative to the earlier ApskScalarRadioMedium module that fits my requirement.

[levy]

You should try replacing the old ApskScalarRadioMedium/ApskScalarRadio with RadioMedium/ApskRadio. The signalAnalogRepresentation parameter controls how the signals are represnted in the analog domain. It is set to scalar by default, so the default should work just fine.

[n-jay]

@levy I changed the .radioMedium.typename to RadioMedium, and .wlan[0].radio.typename to ApskRadio but it still doesn't hit the debug point.

Should the .wlan[0].typename be kept as Ieee802154NarrowbandInterface as in the code above, or should that also be changed? The use of the Ieee802154NarrowbandInterface is actually carried forward from my earlier simulation, accommodating the ApskScalarRadioMedium/ApskScalarRadio configuration.

[levy]

It should be the one that you used before you switched to Ieee802154NarrowbandInterface. Basically, I'm saying that the scalar APSK radio is still supported. Those NED types are removed because the scalar/dimenstional thing became a parameter instead of being hardcoded in the NED type. You can see some examples under examples/wireless/nic/omnetpp.ini

[n-jay]

It should be the one that you used before you switched to Ieee802154NarrowbandInterface.

I think there's a misunderstanding, I didn't switch to Ieee802154NarrowbandInterface,
I continued using it from my earlier OMNET v5 simulation with ApskRadioMedium as the .radioMedium.typename and .wlan[0].radio.typename as ApskScalarRadio.
Basically my original simulation ini looked like this:

• *.radioMedium.typename = "ApskRadioMedium"
• .wlan[0].typename = "Ieee802154NarrowbandInterface"
• .wlan[0].radio.typename = "ApskScalarRadio"

I switched ApskRadioMedium to Ieee802154NarrowbandScalarRadioMedium because ApskRadioMedium seems to be deprecated.

Those NED types are removed because the scalar/dimenstional thing became a parameter instead of being hardcoded in the NED type. You can see some examples under examples/wireless/nic/omnetpp.ini

Noted. I'll check the examples directory and try to replicate that. Thanks!
Seems like the AbstractApskScalarRadio config seems to match my requirement. Will update this thread on how it goes.

[n-jay]

RESOLVED
Turns out the issue was NOT in the simulation parameters, but rather using a some obsolete code in the initialize() method within the protocol:

} else if (stage == INITSTAGE_ROUTING_PROTOCOLS) {
       registerService(Protocol::manet, nullptr, gate("ipIn"));
       registerProtocol(Protocol::manet, gate("ipOut"), nullptr);
}

The corrected form is:

} else if (stage == INITSTAGE_ROUTING_PROTOCOLS) {
       registerProtocol(Protocol::manet, gate("ipOut"), gate("ipIn"));
}