US Patent 7583654 Sub-frame synchronized multiplexing

A method of communication that includes transmitting a communication signal having a synchronization preamble from a first node. Setting a local clock of at least one second node pursuant to the synchronization preamble to synchronize communications between the first and at least one second node. Exchanging subsequent data communications between the first and at least one second node without additional preambles until a special switch point occurs and after the special switch point occurs, transmitting information that utilizes the period of reduced time-synchronization accuracy following data communication.