Patent ID: 7570954
Filing Date: 2009-08-04
Classification: H04W,Y02D

Abstract:
1. A method of operating a two-way communication system between a plurality of communication devices which comprise at least one communication controller including a first communication controller and a plurality of nodes including a first node, the method comprising: receiving a clocking signal used to enable request signals including a first request signal from the first node, the clocking signal provided from the first communication controller; when the first node has a communication message to transmit, and upon receipt of the clocking signal, transmitting the first request signal from the first node to the first communication controller; and receiving an authorization signal at the first node from the first communication controller; upon receipt of the authorization signal, transmitting the communication message from the first node subsequent to receiving said authorization signal to the first communication controller; wherein each of the first request signal, the authorization signal, the communication message, and the clocking signal are transmitted on differing frequencies, and wherein the clocking signal further enables a second request signal to be transmitted to the first communication controller by a second node, and wherein the second request signal can be provided simultaneous with transmission of the communication message.