Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant

摘要: A process for reducing the amount of overhead data in ATM cell headers prior to transmission both upstream and downstream on an HFC cable plant or other media using SCDMA at least path, without loss either IP Ethernet addressing information. virtual link between each remote unit a central is established multiplexing establish every unit. Downstream cells are optimized by stripping off all but 2 bytes leave 50 byte cell. Incoming packets have their information used look up domain address RU destination which this coupled. An header appended packet as RFC 1483 signal start packet. The parsed into 48 payloads. VPI/VCI bound looked last indicated encoding 9th bits. CU modem formatter then generates 2-byte data. bits added byte, these encoded with cell, normal idle codes so that boundaries can be located.