Re: Ademco 5800RP Implementation

["Petem" <petem001@xxxxxxxxx>]

"Christopher Glaeser"  a écrit dans le message de groupe de discussion :
5MOdnaWdRY0JioXQnZ2dnUVZ5oSdnZ2d@xxxxxxxxxxxxxxx

Just curious, how do you suppose the 5800RP avoids creating duplicate
messages?  If the wireless panel is close enough to a 58xx and 5800RP to
receive both the original message from the 58xx and the rebroadcast message
from the 5800RP, does the panel assume they are the same message due to
close proximity in time?  And, if two or more 5800RP are used, how do they
avoid pinging back and forth?  Do you suppose there is a brief window of
time where they do not rebroadcast messages?  Finally, what if two 5800RP
units are within range of the same 58xx and attempt to rebroadcast the
message at almost the same instant?  How does the panel receive messages
from two 5800RP units broadcasting at more or less the same time.  In
summary, how do you suppose these issues are resolved?

Best,
Christopher


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Christopher there are ways in a wireless system to implement anti collision
scheme, hust take a look at AX25 protocol you will surely grab something,
and about repeating the same signal received once by the 58xx and 5800RP all
event in this type of wireless could maybe work with event id (could be a
mix of the event and the time of the event occured, time since last normal
report or such pattern). Me I would implement something like that, remember
that those systeme are bidirectional..so a panel can send a sync signal to
have a pattern that have a time stamp in events..

But that just speculation..

ax 25 info..

http://en.wikipedia.org/wiki/AX.25