| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily grasp the balance of a free communication rate when a plurality of people share the free communication rate. <P>SOLUTION: When a portable telephone MS1 completes communication (Sa10), a rate server FS is the completion of communication notified via a communication network BS (Sa12, Sa14). The rate server FS transmits the telephone number list of the portable telephones MS1, MS2 sharing the free communication rate to the communication network BS (Sa16). In the communication network BS, a communication rate message is transmitted to the portable telephones MS1, MS2 according to the telephone number list of the portable telephone (Sa18, Sa20). In the portable telephone MS1 and the free portable telephone MS2 sharing the communication rate, the balance of the free communication rate is updated according to the charging information in the communication rate message, the balance of the free communication rate, and a rate plan (Sa24, Sa26). <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
