Probably only one is transmitting at a time due to. CSMA. Sent via BlackBerry from T-Mobile
-----Original Message----- From: "JeongKwanhee" <[EMAIL PROTECTED]> Date: Mon, 16 Jun 2008 20:59:15 To:"'renjie huang'" <[EMAIL PROTECTED]> Cc:[email protected] Subject: Re: [Tinyos-help] About TOSH_READ_RADIO_CCA_PIN() Your opinion is right. I think so. But, in experiment rssi value, I confused above conclusion. For example, when 1---à0 exists just only one pair, we assume measured rssi value of 0 node is -80dBm. After that, added 3---à2 by adjacent node of 0 node. But, rssi value of 0 node is still -80dBm. If it already considers interference from adjacent nodes, rssi value have to lower than -80dBm. How do u think about it? _________________________________________________________ Kwanhee Jeong, M.S. Student _________________________________________________________ From: renjie huang [mailto:[EMAIL PROTECTED] Sent: Saturday, June 14, 2008 1:27 AM To: JeongKwanhee Cc: [email protected] Subject: Re: [Tinyos-help] About TOSH_READ_RADIO_CCA_PIN() Hi You want to verify whether TOSH_READ_RADIO_CCA_PIN() work correctly or what? It already consider interference from ajacent nodes. "I just think that it compares to rssi and cca.". This rssi is a sampling of environment noise. On 6/13/08, JeongKwanhee <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: Hello, all members of TinyOS In general TinyOS, TOSH_READ_RADIO_CCA_PIN() is able to use some function if we want to check the state of channel. But, I don't know how to calculate whether channel is clear or not. I just think that it compares to rssi and cca. But, in this case, I think it does not consider the interference of adjacent nodes. For example, SINR. So, I want to check TOSH_READ_RADIO_CCA_PIN() function, and then to fix this function. If you know about this, please contact to me. Thank you. _________________________________________________________ Kwanhee Jeong Tel: +82-62-970-3147 Cell: +82-16-387-6870 Fax: +82-62-970-2291 _________________________________________________________ _______________________________________________ Tinyos-help mailing list [email protected] <mailto:[email protected]> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help -- Renjie Huang Sensorweb Research Laboratory http://sensorweb.vancouver.wsu.edu/ <http://sensorweb.vancouver.wsu.edu/> Washington State University _______________________________________________ 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
