Provided are an apparatus and a method for multimedia data transmission in a cable network using a broadband and physical layer frame structure. The apparatus includes an external network matching module for transmitting data inputted/outputted from/to an external network to a Data Over Cable Service...http://www.google.com/patents/US7961754?utm_source=gb-gplus-sharePatent US7961754 - Apparatus and method for multimedia data transmission and reception in cable network using broadband and physical layer frame structure