| 摘要 |
PURPOSE:To attain abort processing by exchanging a logical link cut-off request command with a logical link cut-off request response at the cut-off of ligical link by an optional process to utilize protocol among communication processes. CONSTITUTION:A logical link cut-off instructure 6 outputted by a generic process PY of a communication is informed to the protocol execution section CS of a communication controller CCU1. The execution section CS references a logical link management table 5, forms a logical link cut-off request 3e corresponding to information 5b holding the highest priority 1 and hands over the protocol to a corresponding communication process P11 after the execution of protocal. When the process P11 returns a logical link cut-off request response 3f to the CS, the CS erases the information 5b of the table 5 and abolishes the response 3f. The CS references again the table 5 and transmits a cut-off request corresponding to information 5c of processes P11, P33 of address and transmission according to the priority, then receives the cut-off request response so as to erase the information 5c, abolishes the response and seeks the next priority while referencing the table 5. |
