[Tinyos-help] TOSBase stop receiving message

yicheng y-jie at northwestern.edu
Wed Sep 14 15:26:45 PDT 2005



I also want to know the answer. Is that multiple notes trying to send
message at the same time causes such problem? Or do you need some TimeSync
for your application?






-----Original Message-----
Date: Wed, 14 Sep 2005 00:14:39 -0600

From: Michael Schippling <schip at santafe.edu>

Subject: Re: [Tinyos-help] TOSBase stop receiving message

To: #AUNG AUNG PHYO WAI# <aung2phyowai at pmail.ntu.edu.sg>

Cc: tinyos-help at millennium.berkeley.edu

Message-ID: <4327BFCF.3020801 at santafe.edu>

Content-Type: text/plain; charset=ISO-8859-1; format=flowed


My experience with mica2's indicates that you should be able to

maintain 5 message/sec from 5-10 motes. 16 doesn't streach it

too much, but you should do the math for bit rates into the host.

Maybe the TOSBase buffers or stack is getting trashed at that rate?





> Hi all,


> I would like to post a question realted to micaZ mote. Currently, I 

> am setting up a group of 16 micaz motes running with ultrasonic sensors 

> and 1 TOSBase. I send message from all 16 sensors to TOSBase almost at 

> the same time with rate of 5 samples/sec/sensor continuously.It causes 

> the TOSBase stop responding after 2 or 3 minutes.


> I've already used new version of TOSBase. I think this problem is the 

> contention of wireless medium between different ultrasonic sensors. 

> Also, I think the problem is at the TOSBase application that cannot 

> handle too much data at the same time from all sensors.


> So I would like to know what is the main problem in our case? I am not 

> sure what is the actual problem is. I also would like to know the ways 

> to solve this kind of problem?


> Thanks in advance for your help.


> *Regards,*


> *Aung Aung Phyo Wai *

> ** 



> ------------------------------------------------------------------------


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