| 摘要 |
PURPOSE:To facilitate a charge processing by reducing the amount of charge information and to effectively use an external memory device by providing a frequency table to define frequency at every size and specification of a packet. CONSTITUTION:A user data length frequency table to define the frequency at every user data length and a packet specification frequency table to define the frequency at every packet specification are housed in a frequency counting mechanism 20 as data. The frequency counting mechanism 20 indexes a frequency definition table with the user data length and the packet specification for the packet transmitted to data terminal equipment, and counts the frequency in a charge information area 51 in a call control memory 50 provided at every logical channel. In such a way, since the frequency by which a communication rate can be calculated by multiplying a unit price is calculated even in the case of performing the discount of a long packet, charge on every packet specification, and time discount, etc., the amount of charge information can be reduced, and also, the external memory device 60 can be used effectively.
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