A method of operation of a communications system, having first (10) and second communications units (12) communicating frame divided information via a relay device (11). The second communications unit (12) transmits a timing signal (step 106) to the first communications unit (10), containing timing...http://www.google.de/patents/US5822314?utm_source=gb-gplus-sharePatent US5822314 - Communications system and method of operation
