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The network mobility (NEMO) basic support protocol is an extension of mobile IP that enables an entire network to maintain the Internet connection when it changes its attachment point to the Internet. However, it gives rise to high overhead, loss packet and long delay on the network link when a network as a unity moves frequently. These problems should seriously affect the communications, real time...
The Application continuity in IMS requires Mobility Management to ensure Session having Seamless handover and small delay. As a Session Control Protocol of IMS, SIP introduces big delay and real-time handover problems. In this letter, we proposed a combination scheme of SIP and mSCTP to solve the problem of Application continuity in IMS. We presented a novel approach for the problem of Compatibility...
Session initiation protocol (SIP) has potential to be selected as a control plane signaling protocol for delivering real-time multimedia applications in military networks. It is necessary to study behaviors of SIP and SIP-based real-time applications as well as to understand their limitations in a tactical network environment. The goals of this study are to assess SIP signaling protocol performance...
The importance of tactical networks that support military operations is well known in the DoD community for their ability to rapidly deploy anywhere at anytime without pre-existing infrastructure. Tactical networks provide a battle space where warfighters possess dynamic and ad hoc mobile communications to support operations against a broad array of threats. Managing mobility to provide undisrupted...
IMS is a core subsystem that provides multimedia services in the next generation network. The architecture of IMS specifies a series of functional entities. In order to analyze and research the performance of IMS network and services more quickly and conveniently, an IMS simulation system model based on NS2 is proposed, the design and implementation of the key issues are given. Some simulation scenarios...
VoIP services have become a major competitor to the PSTN networks and will replace them in the near future. Based on this fact the SIP protocol became very popular. But handling tens of thousand of clients, despite the network and application delays is a challenging task. The SIP proxy servers need to be implemented very efficiently to reduce the application delays. This work evaluates and compares...
The convergence of telecom and Internet are yet to be matured enough to effectively solve the major challenges, like quality of service, different kinds of charging, and security. IP multimedia subsystems (IMS) techniques are one of the strong contenders to solve the above problems by proposing overlay network architecture. It is imperative to find out an optimum network design to support rapidly...
The IP multimedia subsystem (IMS) relies on the session initiation protocol (SIP) protocol for call management and signaling. The SIP protocol defines several types of request messages for its operation. A call setup, for instance, involves SIP INVITE request, which often generates message exchanges across multiple SIP proxies before the call is established. While requests such as INVITE are initiated...
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