| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a stable data buffer control method for surely and efficiently performing the initial reception processing of a leaped non-received information frame and guaranteeing the reception report of a sequential number order for all received information frames without leakage to a high-order layer. SOLUTION: A protocol terminating device starts the reception of the non- received information frame (S102) and calculates a reception data buffer residual amount 'RES' (S103). When the information frame is the leaped non-received information frame (S104:Y), the total amount (JMP) of the leaped non-received information frame is calculated (S105) and the sizes of the RES and JMP are judged (S108). In the case that the new leap of sequential numbers is generated by the reception of the information frame in S104 (S106:Y), JMP is calculated (S107) and advancement to S108 is performed. In the case of N in S106, advancement to S108 is performed. When RES is equal to or more than JMP (S108:Y), the information frame is stored in a reception data buffer, reception is reported to a protocol terminating device control part (S109) and the value of RES is set to SUM (S110). If RES is smaller than JMP (S108:N), the reception processing is stopped and the information frame is abandoned.</p> |
