Energy consumption, periodic messages and different transmission power

[Riccardo]

Hi,

i don't understand how energy consumption is computed.

I made my own application, and i want to see what happen if i send a packet every 5s or every 20s, or if i send a packet with a power of 0dBm or a power of -10dBm.

The problem is that the energy consumption doesn't vary, i obtain always the same value of energy, if i use 5s or 20s or if i use 0dBm or -10dBm the energy consumption is always the same.

Some one could help me please!

regards,

riccardo

[Thanassis Boulis]

As we have written numerous times in this forum before, the energy depends on the state of radio and the time it spends on this state.

So the MAC becomes very important as it influences this directly. If you are using a MAC that does not put the radio to sleep, then sending a few more packets, or using a lower TX power has negligible effect, since the radio is just listening for the huge majority of the time anyway.

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[Riccardo]

Dear Athanassios,

thank you so much for you answer.

I had understood that MAC is really important. Only with TMAC (default settings) is possible to see the effects of the parameters on the energy consumption. If I use 802.15.4 or TunableMAC (default settings) the parameters(interval send message, txPower) haven't effects.

So my problem is, which MAC i have to use to test my application?? Or better, i want to test my application without care about the MAC layer, i want a standard mac layer, it exists in castalia? which one is?

 

Il giorno martedì 21 maggio 2013 12:24:22 UTC+2, Athanassios (Thanassis) Boulis ha scritto:

As we have written numerous times in this forum before, the energy depends on the state of radio and the time it spends on this state.

So the MAC becomes very important as it influences this directly. If you are using a MAC that does not put the radio to sleep, then sending a few more packets, or using a lower TX power has negligible effect, since the radio is just listening for the huge majority of the time anyway.

On 21 May 2013 19:07, Riccardo <rickyp...@gmail.com> wrote:

Hi,

i don't understand how energy consumption is computed.

I made my own application, and i want to see what happen if i send a packet every 5s or every 20s, or if i send a packet with a power of 0dBm or a power of -10dBm.

The problem is that the energy consumption doesn't vary, i obtain always the same value of energy, if i use 5s or 20s or if i use 0dBm or -10dBm the energy consumption is always the same.

Some one could help me please!

regards,

riccardo

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[Thanassis Boulis]

The default MAC for Castalia is bypassMAC which means no MAC. You do not want this.

You do have to care about the MAC you choose, there is no default or magical solution. Maybe you can stick to TMAC for now.

The default dutyCycle for TunaleMAC is 1.0 (i.e. 100%) that's why you do not see significant differences.

 

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