Patent ID: 7865946

Claim:
A data transmission controlling method for controlling transmission of data from data transmitting means to data receiving means over communication channels and for causing said data transmitting means to encrypt data and transmit the encrypted data to said data receiving means over said communication channels, said data transmission controlling method comprising the steps of: encapsulating the data, to be transmitted in multiplexed fashion and having a destination address, in accordance with a first protocol to create a section wherein the section is created based upon the destination address; encrypting the section resulting from the encapsulation; supplementing the encrypted section with a section header and a section trailer, wherein the section header included a MAC (media access control) header; dividing the encrypted supplemented section into a plurality of payloads in accordance with a second protocol; adding MPEG-2 transport stream headers to each payload to form packets for transmission; and transmitting the packets over satellite links, wherein the first encapsulating step is done before the encrypting step and the first protocol pads a portion of 0 to 63 bits with a corresponding â€œ1â€ as a suffix to the data, thereby maintaining a predetermined data length.