[ntp:questions] WLAN synchronization @ 10-100us

Magnus rovery78 at yahoo.com
Sun Dec 7 23:05:04 UTC 2003


I'm looking for a way to synchronize the clock of several nodes over a
WLAN network. The network will be controlled in such a way that no
other traffic will be sent during synchronization. I can't use
standard NTP protocol over UDP/IP due to the extremely high
requirments in synchronization. The clocks in the nodes must be
synchronized to the same clock within less than 100us.

In a wired network this is possible by adding customized hardware that
inserts time-stamps in packets just before they reaches the physical
level of the stack. But is this possible in a WLAN sulotions? I
haven't found any WLAN-device that has radio and stack integrated
which allows for packet modifications at such a low level. Do anyone
know of such a solution?

/Magnus



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