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Providing Quality of Service (QoS) and Quality of Experience (QoE) in connection with media data like audio or video is of key importance for the evolution of future packet-based networks. Especially in telecommunications, the subjective service quality as perceived by the end user depends amongst other parameters on the setup success rate as well as on the delay for session setup, which is measured...
Service quality and user-perceived experience has been a networking research topic for many years. Whereas most related work concentrates on the quality of media, only very few papers, however, discuss the performance of the signaling for those media. This paper addresses the performance of the Session Initiation Protocol (SIP) which is very popular with Next Generation Networks (NGN). A collection...
In IPv4 and IPv6 network, there are especially shortages of Application Performance Monitor system, which can help system owners to monitor and diagnostic system performance and provide warning message. In the paper, we have designed and implemented a SIP service monitoring scheme (SSMS) that includes a Service Detection System (SDS) and Real-time Alert System (RAS). The Service Detection System simulates...
SIP flow management should respect the specific characteristics of SIP protocol applied in multimedia or telecom services for meeting stringent quality of service (QoS) requirement. The specific characteristics include explicit session structure for correlating a series of SIP messages, stringent response time required by real-time applications, extra overhead imposed by SIP message retransmission,...
The purpose of this paper is to provide an insight in the process of obtaining and interpreting values of the collection of metrics that are intended for performance evaluation of the Session Initiation Protocol (SIP). Three of the analyzed metrics are defined in a recently proposed Internet Engineering Task Force (IETF) draft, however, additional two metrics addressing negotiation and renegotiation...
IP multimedia subsystem (IMS) is a new next generation networking architecture that will provide better quality of service, charging infrastructure and security. The basic idea behind IMS is convergence; providing a single interface to different traditional or modern networking architectures allowing better working environment for the end users. IMS is still not commercially adopted and used but research...
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