Patent ID: 8335195

Claim:
A method of communicating data from a node comprising: receiving a first signal, the first signal including first information used to align a response signal from the node; sending the response signal from the node, wherein the response signal includes second information which the node randomly generated; receiving a second signal, wherein a portion of the second signal includes the second information which the node randomly generated; the second signal enabling sending of a subsequent-response signal that uniquely identifies the node; sending the subsequent-response signal which includes identification related information of the node; wherein the first signal, the response signal, the second signal and the subsequent-response signal occur on a common frequency channel; wherein prior to sending the response signal, the node stores the second information which the node randomly generated in memory within the node; wherein subsequent to receiving the second signal the node determines whether the second information included in the portion of the second signal matches the second information which the node randomly generated and stored in said memory of the node; and wherein said subsequent-response signal from the node is sent only if the second information included in the portion of the second signal matches the second information which the node randomly generated and stored in the memory of the node.