Multimedia over coaxial cable access protocol
View Patent ↗A BCN network with BCN modems that communicate using predefined messages to establish, optimize and facilitate data communication.
1. A Broadband Cable Network (BCN) modem having a transmitter that transmits packets to a plurality of nodes in a broadband cable network, the transmitter comprising:
a MAC subsystem that provides the packets for transmission within the broadband cable network;
a Modem subsystem in signal communication with the MAC subsystem, the Modem subsystem receiving the packets from the MAC subsystem and appending information to the packets; and
a RF subsystem in signal communication with the Modem subsystem, that receives the packets from the Modem subsystem and upconverting the packets received from the Modem subsystem;
wherein at least one of the packets is a beacon packet that has a channel number field, change field, sequence number field, network coordinator ID field, next beacon index field, admission frame length field, admission window, asynchronous MAP length field and a beacon Cyclic Redundancy Checking (CRC) field; and
wherein at least one of the packets is a data and control packet having a header and a variable length payload and wherein the header has at least five fields selected from the group consisting of a transmit clock field, packet type field, packet subtype field, version field, source node ID field, destination node ID field, and header check sequence field.
2. A Broadband Cable Network (BCN) modem having a receiver that receives packets from a plurality of nodes in a broadband cable network, the receiver comprising:
a RF subsystem that receives packets and downconverting the packets wherein at least one of the packets is a control and data packet having a header, the header having at least five fields selected from a group consisting of a transmit clock field, packet type field, packet subtype field, version field, source node ID field, destination node ID field, and header check sequence field, the control and data packet further having a variable length payload;
a Modem subsystem in signal communication with the RF subsystem, the Modem subsystem receiving the packets and removing control information from the packets; and
a MAC subsystem that receives packets within the broadband cable network and retrieving data for use by the BCN modem;
wherein at least one of the packets is a beacon packet that has a channel number field, change field, sequence number field, network coordinator ID field, next beacon index field, admission frame length field, admission window, asynchronous MAP length field and a beacon Cyclic Redundancy Checking (CRC) field.
3. A method for transmitting packets from a Broadband Cable Network (BCN) modem to a plurality of nodes in a broadband cable network, the method comprising:
formatting the packets in a MAC subsystem that transmits the packets within the broadband cable network, including formatting a data and control packet for transmission within the broadband cable network, the data and control packet having a header and a variable length payload, the header having at least five fields selected from the group consisting of a transmit clock field, packet type field, packet subtype field, version field, source node ID field, destination node ID field, and header check sequence field;
receiving the packets from the MAC subsystem at a Modem subsystem that is in signal communication with the MAC subsystem and that appends information to the packets; and
upconverting the packets with the information for transmission via the broadband cable network at a RF subsystem that is in signal communication with the Modem subsystem;
wherein at least one of the packets is a beacon packet that has a channel number field, change field, sequence number field, network coordinator ID field, next beacon index field, admission frame length field, admission window, asynchronous MAP length field and a beacon Cyclic Redundancy Checking (CRC) field.
4. A method for receiving packets at a receiver in a Broadband Cable Network (BCN) modem from at least one node in a broadband cable network, the method comprising:
receiving the packets and downconverting the packets at a RF subsystem including a control and data packet having a header that has at least five fields selected from the group consisting of a transmit clock field, packet type field, packet subtype field, version field, source node ID field, destination node ID field, and header check sequence field and variable length payload;
removing control information from the packets in a Modem subsystem that is in signal communication with the RF subsystem; and
retrieving data for use by the BCN modem at a MAC subsystem that is in signal communication with the Modem subsystem and in receipt of the packet with the control information removed;
wherein at least one of the packets is a beacon packet that has a channel number field, change field, sequence number field, network coordinator ID field, next beacon index field, admission frame length field, admission window, asynchronous MAP length field and a beacon Cyclic Redundancy Checking (CRC) field.