Mute Response Question - E1.20 RDM (Remote Device Management) Protocol Forums

endoftheworld · September 19th, 2006

Since the past month or so, this has been bugging us while trying to implement a RDM library. Initially we thought it was a bug in the code, but to my surprise, having dug up this thread .... coinicidences aren't that rare.

We have ended up with exactly similar situation(s), where collisions from Device A and B (having pretty close Device ID's) turn up as having good checksum !!

In our case in fact, the "collision packet" that does have a good checksum, decodes to a device id that doesn't even exist (but is close to the existing ones) ... thereby implying that somehow ... response packets from A and B come in at exactly the same timeframe on top of one another, forming this collison packet .

It'll be interseting to know if anybody else has replicated this scenario ?
It might turn out to be a shortcoming of the entire discovery process.

Cheers

www.enttec.com

September 19th, 2006	#8
endoftheworld Junior Member Join Date: Jul 2006 Posts: 6	discovery collisions making sense Since the past month or so, this has been bugging us while trying to implement a RDM library. Initially we thought it was a bug in the code, but to my surprise, having dug up this thread .... coinicidences aren't that rare. We have ended up with exactly similar situation(s), where collisions from Device A and B (having pretty close Device ID's) turn up as having good checksum !! In our case in fact, the "collision packet" that does have a good checksum, decodes to a device id that doesn't even exist (but is close to the existing ones) ... thereby implying that somehow ... response packets from A and B come in at exactly the same timeframe on top of one another, forming this collison packet . It'll be interseting to know if anybody else has replicated this scenario ? It might turn out to be a shortcoming of the entire discovery process. Cheers www.enttec.com

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