Accounting method and system in a packet communication network

An accounting system for use in accounting information distribution in a packet communication network in which information is distributed by packets between a server of an information service provider and a plurality of terminals of users by way of the packet communication network, said accounting system comprising:

• accounting amendment apparatus which outputs accounting amendment information dependent on a kind or a use of the distributed information;
• and
• an accounting apparatus for deciding the account for said information distribution, said accounting apparatus deciding an account for said information service provider and said users based on said accounting amendment information and numbers of transmitted and received packets from an exchange of said packet communication network,
• wherein said accounting system recognizes a kind of information by an extension of a file included in said distributed information while said accounting system recognizes a use of information by a name of said file.

An accounting method for use in accounting information distribution in a packet communication network in which information is distributed by packets between a server of an information service provider and a plurality of terminals of users by way of the packet communication network, said accounting method comprising the steps of:

• amending a specific accounting of numbers of transmitted and received packets in said packet communication network with accounting amendment information based on the distributed information;
• and
• deciding an account to be charged to said information service provider and to said users, based on the amended specific accounting,
• wherein, in a case in which music data is requested from the information service provider by one of the plurality of terminals of users, the method further comprising:
• determining whether packets of data sent from the information service provider to the one of the plurality of users are requested music data or sample music data not requested by the one of the plurality of users, and if so, counting a number of such packets;
• and
• deciding the account be charged to said information service provider and to the one of the plurality of users, based on a specific fee to be charged only to said information service provider and not to said one of the plurality of user for the number of packets corresponding to the sample music data not requested by the one of the plurality of users.