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In IP Multimedia Subsystem(IMS) of UMTS, IMS information is delivered through the general packet radio service(GPRS) transport network, before a user equipment (UE) can access the IMS service, it must performance both packet-switch domain and IMS authentication. It is inefficient that almost all involved steps in IMS authentication are duplicated. Hence, some one-pass IMS authentications were proposed...
Network operators are in the process of adopting the IP Multimedia Subsystem (IMS) as their main underlying infrastructure which will in turn be used as a Service Delivery Platform (SDP). This process requires the migration of current services to their IMS counterparts, as well as a compatibility layer enabling successfull communication between IMS and other network infrastructures. Any and all functionality...
SIP (Session Initiation Protocol) plays a very important role in softswitch which is the core technology of the NGN (Next Generation Network). NAT (Network Address Translator) traversal for SIP has been the exchange of operational impact on the rapid popularization of softswitch service. In this paper, we introduce SBC (Session Border Controller) and ALG (Application Level Gateway), which are recognized...
The method for inter-working between UPnP home network and IMS network is proposed. All the UPnP enabled devices in the home network can access IMS network through an UPnP enabled home gateway. We present the architecture of the home gateway. The procedures of accessing IMS IPTV services for UPnP enabled devices are also given, including the device and service description of the home gateway with...
In an effort to provide seamless mobility support in IMS/MMD networks, operators need to choose a specific IP- based mobility protocol. However, there are several micro- and macro-mobility protocols available that the operators can choose from. Operators often face the challenges of selecting the appropriate mobility protocol that can provide the most cost efficient solution under a specific operating...
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