Abstract
The evolving standards of mobile communications, the wide variety of services they offer and the rapid growth of the Internet have made a merger of the two network technologies inevitable. One of the most prominent platforms that has been developed to facilitate this is the IP Multimedia Subsystem (IMS) concept. Many mobile communications standards integrate IMS as the main core network architecture and Quality of Service (QoS) is the main concern for customer satisfaction. A major approach to optimisation of QoS is the Differentiated Services scheme, and a simulation study of implementations of this is presented. The study covered an IMS core network architecture modelled with discrete-event network simulator software, with a Differentiated Services QoS scheme run over it with differing bearer traffic scenarios. Implications for core network architectures are discussed.
Highlights
Mobile communications has evolved towards an IP (Internet Protocol) core network
After running the code for the SIP signalling architecture on Network Simulator 2 (NS-2), the results and visualisation files generated by Network AniMator (Fig. 4) showed that registration and session connection performed reliably: this is illustrated in Fig. 5, where the black arrow between nodes 1 and 0 represents an example of a SIP registration and signalling packet to the proxies
The implementation of an all-IP mobile communications network is a major requirement for the latest mobile networks
Summary
Mobile communications has evolved towards an IP (Internet Protocol) core network. This has led to much research into the IP Multimedia Subsystem (IMS) concept, which is an IP-based network that allows integration of voice and multimedia, as well as permitting new environments with new purposes [1]. Excell, “Optimising Differentiated Services Strategies under IMS”, Annals of Emerging Technologies in Computing (AETiC), Print ISSN: 2516-0281, Online ISSN: 2516-029X, pp. AETiC 2018, Vol 2, No 3 and switches the call control over to the designated handler.”. Most of the applications expected under IMS have different Quality of Service (QoS) requirements: to handle these with the same QoS preferences as all other packet data routed through the Internet would result in unsatisfactory performance and customer dissatisfaction
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