Modelling of computer and communication systems
Modelling of computer and communication systems
Wireless and Mobile All-IP Networks
Wireless and Mobile All-IP Networks
Reducing authentication signaling traffic in third-generation mobile network
IEEE Transactions on Wireless Communications
Connection failure detection mechanism of UMTS charging protocol
IEEE Transactions on Wireless Communications
Modeling Credit Reservation Procedure for UMTS Online Charging System
IEEE Transactions on Wireless Communications
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In 3GPP Release 6, the IP-based Online Charging System (OCS) is defined to support online charging for General Packet Radio Service (GPRS) and IP Multimedia core network Subsystem (IMS) services. During an online charging GPRS session, a number of mid-session events, such as Quality of Service (QoS) could dynamically affect the rating of the in-progress service. When such events occur, the GPRS support node needs to re-authorize the granted credit units with the OCS. If the change of QoS occurs frequently,the signaling load incurred by the re-authorization procedure increases heavily. In this paper, we propose a threshold-based scheme with parameter δ to reduce the traffic signaling for credit reauthorization procedure. By selecting an appropriate δ value, our study indicates that the signaling overhead in the OCS can be significantlyreduced while the inaccuracy of the credit informationinsignificantly increases. Based on our model, the mobile operator can choose appropriate parameter values in the threshold-based scheme for various traffic conditions.