| 摘要 |
PURPOSE:To select an optimum packet length depending on a reception buffer capacity by providing a packet length decision section so as to decide an optimum packet length within the capacity of a reception buffer among packet length data in a memory. CONSTITUTION:Data representing a packet length from length 1 till length (n) are stored in a memory 20, and data representing a maximum packet length and data representing a minimum packet length are stored in a transmission line packet length storage section 24. After recognizing the capacity of a reception buffer 11, a packet length decision section 22 picks up packet length data whose capacity is less than that of the buffer 11 among packet length data stored in the memory 20. Then the section 22 picks up packet length data within a maximum packet length and a minimum packet length stored in the storage section 24 and decides a maximum packet length so that the capacity is one over an integral number of the capacity of the buffer 11 among the picked up data and sends the decided data to a transmission section 23.
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