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dc.contributor.authorLee, Hsin-Yien_US
dc.contributor.authorLin, Yi-Bingen_US
dc.date.accessioned2014-12-08T15:06:44Z-
dc.date.available2014-12-08T15:06:44Z-
dc.date.issued2010-06-01en_US
dc.identifier.issn1536-1276en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TWC.2010.06.080342en_US
dc.identifier.urihttp://hdl.handle.net/11536/5285-
dc.description.abstractOnline Charging System (OCS) supports multiple prepaid and postpaid sessions simultaneously. Through credit reservation, the OCS assigns some credit units to a session. These credit units are decremented based on the traffic volume or the duration time. If the assigned credit units are consumed before the session is completed, an reserve units (RU) operation is executed to obtain more credit units from the OCS. If the credit at the OCS is depleted, the prepaid session is forced to terminate. During the RU operation, packet delivery is suspended until extra credit units are granted from the OCS. To avoid session suspension during credit reservation, we propose the credit pre-reservation mechanism (CPM) that reserves credit earlier before the credit at the GGSN is actually depleted. Analysis and simulation experiments are conducted to investigate the performance of the mechanism. Our study indicates that the CPM can significantly improve the performance of the OCS prepaid mechanism.en_US
dc.language.isoen_USen_US
dc.subjectCredit reservationen_US
dc.subjectdiameter protocolen_US
dc.subjectonline chargingen_US
dc.subjectprepaid serviceen_US
dc.subjectUniversal Mobile Telecommunications System (UMTS)en_US
dc.titleCredit Pre-Reservation Mechanism for UMTS Prepaid Serviceen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/TWC.2010.06.080342en_US
dc.identifier.journalIEEE TRANSACTIONS ON WIRELESS COMMUNICATIONSen_US
dc.citation.volume9en_US
dc.citation.issue6en_US
dc.citation.spage1867en_US
dc.citation.epage1873en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000278540100008-
dc.citation.woscount3-
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