Hi all,
Can some one tell me how to specify node coordinates (x, y) in TOSSIM 2.x?
regards;
Wassim Drira
>Hi Tal,
>
>The LinkLayerModel application generates two files, topology.out and
>linkgain.out.
>I don't know exactly what to do with the values.
>
>1) The snippet of Python code create nodes:
>f = open("topology.out", "r")
>lines = f.readlines()
>for line in lines:
> s = line.split()
> if (len(s) > 0):
> m = t.getNode(s[0])
>Here I create nodes with the IDs in the file, but where should I set
>the dimension x/y? Which method should I use for this?
>
>2) The snippet of Python code add a link from src to dest with gain.:
>f = open("linkgain.out", "r")
>lines = f.readlines()
>for line in lines:
> s = line.split()
> if (len(s) > 0):
> if (s[0] == "gain"):
> r.add(int(s[1]), int(s[2]), float(s[3]))
>Here I understood.
>
>3) The snippet of Python code to create the noise model. Is it correct?
>f = open("linkgain.out", "r")
>lines = f.readlines()
>for line in lines:
> s = line.split()
> if (len(s) > 0):
> if (s[0] == "noise"):
> t.getNode(int(s[1])).addNoiseTraceReading(int(s[2])l)
> t.getNode(int(s[1])).addNoiseTraceReading(int(s[3])l)
>for i in range(0, 16):
> t.getNode(i).createNoiseModel()
>
>Thanks and best regards
>
>
>
>On Fri, Jun 6, 2008 at 3:12 PM, Tal Rusak <[EMAIL PROTECTED]> wrote:
>> Here is an example of importing a topology file from the tutorials:
>> f = open("15-15-tight-mica2-grid.txt", "r")
>>
>> lines = f.readlines()
>> for line in lines:
>> s = line.split()
>> if (len(s) > 0):
>> if (s[0] == "gain"):
>> r.add(int(s[1]), int(s[2]), float(s[3]))
>> (http://docs.tinyos.net/index.php/TOSSIM)
>>
>> Tal
>>
>>> I understood how to generate the topology file, my doubt now is:
>>> Which command should I use to input these values?
>>>
>>>
>>> On Fri, Jun 6, 2008 at 11:21 AM, Daniel Pereira <[EMAIL PROTECTED]>
>>> wrote:
>>>> I didn't understand how to configure the network topology for TOSSIM.
>>>> The snippet of Python code create seven nodes.
>>>> for i in range(0, 7):
>>>> t.getNode(i).createNoiseModel()
>>>>
>>>> How can I relate this nodes with the network topology?
>>>> Should I set the Channel, Radio and Topology parameters in the Python?
>>>>
>>>> Thanks all
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, Jun 5, 2008 at 12:14 PM, Tal Rusak <[EMAIL PROTECTED]> wrote:
>>>>> Hi,
>>>>> There are two components to the link model in TOSSIM 2.0.2: noise
>>>>> and
>>>>> gain. Noise is the external interference and noise from sources other
>>>>> than the TinyOS network, which gain is the strength at which nodes in
>>>>> the network can hear packets that other nodes send. The probability
>>>>> of receiving a packet is given by the signal to noise ratio, which is
>>>>> gain - noise in the dB scale considered here. This is explained in
>>>>> http://sing.stanford.edu/pubs/ipsn07-noise.pdf
>>>>> TOSSIM currently considers that gain is constant per node pair, and
>>>>> network topologies can be constructed using the tool discussed at
>>>>> http://www.tinyos.net/tinyos-2.x/doc/html/tutorial/usc-topologies.html
>>>>> The TOSSIM tutorial shows how to use python to parse this tool's output
>>>>> and to input the gain values to the simulator. Search for "topo.txt" in
>>>>> this entry:
>>>>> http://docs.tinyos.net/index.php/TOSSIM#Configuring_a_Network
>>>>> Regarding the noise values, you can collect noise samples from your
>>>>> environment using
>>>>> tinyos-2.x-contrib/stanford-sing/apps/RssiSample
>>>>> To create an artificial "low noise" environment, you can create a
>>>>> text file with very low values. If your values in the noise file are
>>>>> all at least 14 below the values used for gain, then all packets are
>>>>> received. Just be sure to have at least 100 entries in the file.
>>>>>
>>>>> Thanks,
>>>>> Tal
>>>>>
>>>>>> Hello
>>>>>>
>>>>>> How can I use a topology file in TOSSIM
>>>>>> (http://www.tinyos.net/dist-2.0.0/tinyos-2.x/doc/html/tutorial/usc-topologies.html)
>>>>>> once I have the .out
>>>>>> files?
>>>>>>
>>>>>> The Tossim wiki show how to integrate a text file noise model like
>>>>>> heavy-meyer but I didn't find how to use this outpouts.
>>>>>>
>>>>>> best regards
>>>>>>
>>>>>> _______________________________________________
>>>>>> Tinyos-help mailing list
>>>>>> [email protected]
>>>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>>>>>>
>>>>>
>>>>>
>>>>>_______________________________________________
>>>>> Tinyos-help mailing list
>>>>> [email protected]
>>>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>>>>>
>>>
>>
>
>nk
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