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Modern cellular networks are expected to support both voice and a growing volume of data traffic. The rapid growth in data traffic has promoted network operators to move to Long Term Evolution (LTE), a 4th generation of wireless network infrastructure. However, LTE architecture does not support native circuit switching services and relies on the IP Multimedia Subsystem (IMS) for supporting voice and...
On the basis of analysis of research status on IMS network security, this paper categorizes and analyzes possible abnormal events in IMS network. Combined with mature detection theories, we present corresponding strategy of detection from application layer to provide theoretical and decisive support for warning and further network process measurements to reduce the loss brought by abnormal events...
The Third Generation Partnership Project(3GPP) forum [1] has specified IMS (Internet Protocol Multimedia Subsystem) which provides resource, admission and charging control [2] for multimedia services. The OMA (The Open Mobile Alliance) forum [3] has specified BCAST (Mobile Broadcast Services) [4] which is network agnostic service enabler for mobile broadcast service. Up to now, IMS and BCAST are separated...
With deploying heterogeneous communication devices with different kinds of access networks, it is one of the promising services to transfer an active session from one device to another. IETF SIP can provide the ubiquitous service regardless of underlying networks and device types. In this paper, we investigate two mainstream using SIP, IMS and P2PSIP, and propose interworking architecture to provide...
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...
This paper proposes a new mechanism, multi-connection from heterogeneous networks in IP multimedia subsystem (IMS). With the appearance of IMS, multimedia service has become an important service, which needs high bandwidth and low delay. But the network, which can match these features simultaneously, doesn't exist. In order to provide robust, high-quality services in IMS, we utilize the character...
The IP multimedia subsystem (IMS), originally designed by 3GPP and later updated by 3GPP, 3GPP2 and TISPAN, presents itself as an architectural framework that allows the convergence of the Internet, wireless and wireline networks and a global platform for the delivery of IP multimedia applications in next generation networks (NGN). One of the most used services to test IMS capabilities is push-to-talk...
As a result of the evolution of computer and networking technologies, the Third Generation Partnership Project (3GPP) has proposed the IP Multimedia Subsystem (IMS) as a key element in Next Generation Networks (NGN) that supports multimedia services in the packet switched domain. To use IMS services, users should register in IMS network and to have their information be registered in IMS Databases...
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