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    Credit pre-reservation mechanism for UMTS prepaid service
    12 years 11 months ago
    Credit pre-reservation mechanism for UMTS prepaid service
    Download  ir.lib.nctu.edu.tw
    Online Charging System (OCS) supports multiple prepaid and postpaid sessions simultaneously. Through credit reservation, the OCS assigns some credit units to a session. These credi...
    Hsin-Yi Lee, Yi-Bing Lin
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