Hello Hamid, Thank you. If one mote can occupy multiple channels, why can the mote be changed from one channel to another channel? what is the difference if two motes use different channels? Thanks.
Regards, Haixia ________________________________ From: Hamid Rafiei Karkvandi [hamid.raf...@gmail.com] Sent: Thursday, May 17, 2012 11:03 AM To: Li, Haixia-OSU Stillwater Cc: tinyos-help@millennium.berkeley.edu Subject: Re: [Tinyos-help] what are the default transmission power of IRIS, mica2, and micaz? I am not quite sure but will try to answer your question and will be glad if anyone can correct me if I am not. I believe the benefit of DSSS is in the fact that higher bandwidth can be used and therefore larger number of channels can be occupied by the mote, but the structure of DSSS and the use of PN noise prevents the interference on the same channel and hence motes can share the same channel with no problem, Regards, Hamid Rafiei Karkvandi On Thu, May 17, 2012 at 9:47 AM, Li, Haixia-OSU Stillwater <hai...@ostatemail.okstate.edu<mailto:hai...@ostatemail.okstate.edu>> wrote: Thank you for your answer. IN addition, I'm confused about the radio of IRIS. The manual says "The 802.15.4 radio includes a DSSS baseband modem proving a spreading gain of 9 dB" and "the radio used by the IRIS is an IEEE 802.15.4 compliant RF transceiver" . So, if a iris node occupies the channels 11, does it just occupy one channel? or, does it occupy multiple channels because it used DSSS? Can anyone explain it to me? Thanks a lot. Regards, Haixia ________________________________ From: Hamid Rafiei Karkvandi [hamid.raf...@gmail.com<mailto:hamid.raf...@gmail.com>] Sent: Thursday, May 17, 2012 10:34 AM To: Li, Haixia-OSU Stillwater Cc: tinyos-help@millennium.berkeley.edu<mailto:tinyos-help@millennium.berkeley.edu> Subject: Re: [Tinyos-help] what are the default transmission power of IRIS, mica2, and micaz? You can check the value of default transmission power and even change it through the radio chip header files in tos folder, (the value is presented by a number between 0 - 15 for IRIS mote for example, and you can find out the corresponding dBm value with the use of radio chip datasheet) Regards, Hamid Rafiei Karkvandi On Wed, May 16, 2012 at 4:33 PM, Li, Haixia-OSU Stillwater <hai...@ostatemail.okstate.edu<mailto:hai...@ostatemail.okstate.edu>> wrote: Hello all, Can anyone tell me what the default transmission power of IRIS, mica2, and micaz are? Thanks. Haixia _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu<mailto:Tinyos-help@millennium.berkeley.edu> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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