| 摘要 |
<p>PURPOSE:To coexist a high respondence and economicality even when transmission data are different by providing the plural numbers of logical channels of which maximum packet size is different as a communication means between a terminal and a host and selecting one of plural logical channels having the maximum packet size suitable for the data quantity to transmit. CONSTITUTION:The plural numbers of logical channels 16a and 16b of which maximum packet size is different as the communication means between a terminal 12 and a host 14 and one of the logical channels 16a and 16b suitable for the data quantity to transmit is selected. Consequently, when the data transmission quantity is less, the increase of a transmission delaying time is prevented either by selecting the logical channel of a small packet size or by specifying a small maximum packet size, on the other hand, when the data transmission usage is frequent and fluctuates, the reduction of a communication cost can be attained either by selecting the logical channel of a large maximum packet size or by specifying the large maximum packet size.</p> |
