Wcdma for Umts
Wireless and Mobile Network Architectures
Wireless and Mobile Network Architectures
Wireless dynamic channel assignment performance under packet data traffic
IEEE Journal on Selected Areas in Communications
Improving GSM call completion by call reestablishment
IEEE Journal on Selected Areas in Communications
A novel prebuffering scheme for IPTV service
Computer Networks: The International Journal of Computer and Telecommunications Networking
Eliminating tromboning mobile call setup for international roaming users
IEEE Transactions on Wireless Communications
Heterogeneous Wireless Networks: Configuration and Vertical Handoff Management
Wireless Personal Communications: An International Journal
Trade-off between energy efficiency and report validity for mobile sensor networks
ACM Transactions on Sensor Networks (TOSN)
| Hi-index | 0.00 |
Universal mobile telecommunications system (UMTS) provides packet-switched data services for mobile users. To efficiently deliver packets in the UMTS core network, the PDP contexts (i.e., the routing information) are maintained in the volatile storage (e.g., memory) of SGSN, GGSN, and UE. The GGSN routes packets between the UMTS core network and external data networks, and thus has heavy traffic and computation loading, which may result in PDP contexts lost or corrupted, and the QoS of the UMTS network may degrade significantly. To resolve this issue, 3GPP 23.007 proposes a mechanism for GGSN failure restoration. In this mechanism, the corrupted PDP contexts can be restored through the PDP Context Activation procedure. However, this incurs extra signaling cost to the network. To reduce the network signaling cost and delay for restoration of the corrupted PDP contexts, this paper proposes an improved mechanism "GGSN Failure Restoration" (GFR) with different backup algorithms. The analytic models and simulation experiments are conducted to evaluate GFR. Our study indicates that the GFR mechanism can significantly reduce the cost for the PDP context restoration.