Patent ID: 7346797

Claim:
A clock network comprising: a plurality of individual clock nodes, ( 310 , 320 . . . 342 ) each individual clock node comprising a communications device and a clock producing a clock signal, wherein each of the individual clock nodes (e.g. 310 ) receives clock information from at least one other individual clock node in the clock network (e.g. 320 ) via a direct communication link; and each of the individual clock nodes receives clock information for each of the clock nodes, (e.g. 331 ) with which it does not have a direct communication link, via other individual clock nodes, (e.g. 330 ) where a first individual clock node ( 310 ) constructs a composite clock by using the clock at that node as a master clock in combination with readings and composite clock data from transmitting clock nodes ( 320 , 330 and 340 ) with which the first individual clock node is in direct communication.