Data communication channel processing apparatus for transmitter, protocol stack structure and operating method therefor

A computer-readable memory medium for storing computer-executable process steps in a data channel processor to process data between said data channel processor and a plurality of slave processors, wherein the medium includes an accessing step and a driving step, the computer-executable process steps comprising:

• said accessing step comprising:
• a generating step for outputting a provision signal prior to data transmission to said driving step to set said driving step in a receiving mode;
• a downward processing step that activates, maintains, and de-activates a physical connection for said data transmission to said slave processors;
• and,
• an upward processing step that activates, maintains, and de-activates the physical connection for said data transmission to said data channel processor;
• said driving step comprising:
• a transmitting step for transmitting the data to another data channel processor;
• a downward driving step for receiving the data from said downward processing step and for recording said received data in a Dual-Port Random Access Memory (DPRAM);
• and,
• an upward driving step for reading said recorded data from said DPRAM and outputting said read data to said upward processing step.

A computer-readable memory medium for storing computer-executable process steps in a plurality of slave processors coupled to other devices via a plurality of optical links to process data between a data channel processor and said slave processors, the computer-executable process steps comprising:

• (1) an inputting step for reading the data transmitted from said data channel processor and stored in a Dual-Port Random Access Memory (DPRAM) during a downward processing mode;
• (2) a distributing step for transmitting said read data from said DPRAM to corresponding said other devices during said downward processing mode;
• (3) a collecting step for combining the data received from said other devices via said plurality of said optical links and for storing said combined data in said DPRAM during an upward processing mode;
• (4) an outputting step for outputting said combined data stored in said DPRAM to transmit said combined data to said data channel processor during said upward processing mode;
• and,
• (5) a synchronizing step for matching configuration between said inputting step (1) and said outputting step (4) so that the execution of said outputting step (4) can perform synchronously with said inputting step (1).

A method for executing the initialization process between a channel processor and a plurality of slave processors that do not have their own respective protocol stacks, wherein said data channel processor and said plurality of slave processors being externally connected over a transmission line, said method comprising the steps of:

• transmitting, at the data channel processor, an initialization signal having a predetermined port address to one of said externally connected slave processors over a transmission line via a protocol stack located only in the data channel processor, wherein said protocol stack is shared with said plurality of slave processors;
• outputting, at said data channel processor, a message check signal to said slave processors corresponding to said predetermined port address;
• outputting, at the slave processors, a received message check signal to said data channel processor when said slave processor is linked to said data channel processor;
• and,
• outputting, at said data channel processor, a message LAPD configuration signal to the slave processors upon receiving said received message check signal.