Multimedia networks are now providing versatile services to meet different types of subscriber needs including voice, video, data, etc. Voice and video conferencing applications over these IP networks have already gained wide acceptance in today's end-user communities. The traffic characteristics and intensity as a function of time, geographic source can be realized by observing traffic distribution. Multimedia traffic has characteristics very different from Poisson characteristics, generating high rate data at one time and low rate data at another. Variable bit rate (VBR) realtime applications such as compressed video and audio and also the data sources tend to generate bursty traffic patterns and exhibit certain degree of correlation between arrivals and show long-range dependence in time i.e. self-similarity [1, 2, 3, 4, 5]. Therefore, it is important to identify and characterize network traffic flows to analyze network performance. In the present work the analysis of real time audio and video streaming traffic, colleted from the videoconferencing session of an enterprise high-speed hybrid multimedia network, has been done in the context of self-similarity.
This paper looks potential approaches to interoperability as well as inter-technology mobility using Long Term Evolution (LTE) between different generations of wireless communication. Focus is given on how these approaches can be used in interoperable service deployment, access technology integration, service continuity and smooth migration to LTE by maximizing the use of legacy networks coverage. One of the most important interoperability criterions is the handover latency. Using NCTUNS6 simulator it is shown that LTE (4G) provides less handover latency in comparison to that of other generations of wireless communication system for homogeneous environment
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