scnsl-users — A mailing list to get help.

Re: [Scnsl-users] received power

[<fra...@un...>]

Hi,

virtual_transmissions is a wrong place to check.
The main data structure is transmissions.

The model used by WirelessNetwork is:

p / ( d^a ) >= th

where:

p is the transmission power (the power used by the sender)
d is the distance between the sender and the nodes
a is the attenuation factor (how much the power degrades w.r.t. the distance)
th is the receiver thrashold

If the formula holds, the receiver is able to get a packet from the sender.
The current sender transmission power is stored into transmissions,
and it is a duplicated value: the original is stored into the wireless node.
In no place is stored the power sensed by the receiver
(and if I have understand, this is what you want).
Of course, you can add a field into transmissions, to store the sensed power.

MacNode_802_15_4_tlm_fifo_t does no have any way to get
the power with whom the packet was received.

The simplest way to get the information is:

1) add into Packet_t a field to store the receiving power.
2) before each calling the sendToNode inside the network,
update the field: remember! each time since each destination will
sense a different value
3) into the node proxy, read such a new information
4) using the node proxy, forward this information to the node

Since the 802.15.4 model is a children to Wireless node,
you can just change the wireless node to allow your "user application"
to get the sensed power (avoid to change the 802.15.4: it is not very simple).
And you can also add a method getSensedPower to the simple transmission interface.

I hope this will be useful.

Best regards,
Francesco Stefanni


----- Original Message -----
From: Ramón Ayuso Ramírez <ram...@gm...>
Date: Friday, July 2, 2010 20:34
Subject: [Scnsl-users] received power
To: scn...@li...

> Hi everyone,
> I'm a new member of this mailing-list. I am simulating a 
> wireless 
> network and I need to know the received power from other nodes. 
> This 
> received power is calculated by WirelessNetwork_t.i.hh and 
> stored in 
> _virtual_transmissions.
> 
> But I don't get to know the received power using the 
> MacNode_802_15_4_tlm_fifo_t class. I think I must change this 
> class, but 
> I don't get it.
> 
> Thank you very much.
> Regards,
> Ramon
> 
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[Scnsl-users] received power

[Ramón A. R. <ram...@gm...>]

Hi everyone,
I'm a new member of this mailing-list. I am simulating a wireless 
network and I need to know the received power from other nodes. This 
received power is calculated by WirelessNetwork_t.i.hh and stored in 
_virtual_transmissions.

But I don't get to know the received power using the 
MacNode_802_15_4_tlm_fifo_t class. I think I must change this class, but 
I don't get it.

Thank you very much.
Regards,
Ramon

[Scnsl-users] Scnsl Beta

[<fra...@un...>]

Dear all,

we have finally released SCNSL Beta.
This version is very different from the Alpha one,
and contains a lot of improvements.
Check the CHANGELOG for a short summary.

Currently we are working on a complete code rewriting,
which should lead to the SCNSL 1.0 version (let's hope!).
It will be a very improved version, with a complete
new code structure.
It will provide a very simpler mechanism to instantiate a simulation.
Also mantenibility and portability will be improved:
the new version will use CMake, and we are also switching to a different
repository (probably Bazaar or Git).
We are also planning to write a sort of manual, in order to help
people to adopt SCNSL.
Unfortunatly at this moment we are not able to say when such a
new version will be released, but we hope that this could happen
in few month.

As always, suggestions, requests and patches are welcome.

We hope you will continue to use and support SCNSL,
and that SCNSL will be useful for you.
Best regards,

Francesco Stefanni

[Scnsl-users] Test

[<fra...@un...>]

This is a first email just for testing.

F.