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This paper proposes three innovative point-to-multipoint protection schemes to provide efficient and reliable MPLS transport profile multicast services, which is particularly relevant for the fast growing IPTV broadcast service. The three proposed protection schemes are all based on the interconnected rings structure, which is a widely deployed topology of legacy networks and has the natural ability...
This paper examines various configurations of the large scale Russian National Intelligent Network in order to analyze the required volumes of signaling equipment. Network configuration is modified by adding network nodes and by sharing signaling load.
A traffic engineered label switched path (TE-LSP) is usually deployed on an optimally computed path. In complex network scenarios, or when external nodes like path computation elements (PCEs) are solicited in a distributed manner, the already resource hungry task of optimal path computation could take a considerable amount of time during which network resources may fluctuate. This could result in...
One of the tasks of network management is to dimension the capacity of access and backbone links. Rules of thumb can be used, but they lack rigor and precision, as they fail to reliably predict whether the quality, as agreed on in the service level agreement, is actually provided. To make better predictions, a more sophisticated mathematical setup is needed. The major contribution of this article...
In WDM backbone networks, the traffic pattern evolves constantly due to the nature of the demand itself or because of equipment failures leading to reroute affected connections. In this context, requests are routed greedily using available resources without changing the routing of pre-established connections. However, such a policy leads to a poor usage of resources and so to a higher blocking probability:...
The present work addresses probabilistic solution of two fundamental issues of cellular mobile environment maintaining a common set of information. One of the issues is to predict the location of a mobile user whereas the other is to predict the traffic load of each area and accordingly distribute channels among different areas. For location management the entire area covered by cellular architecture...
Inherently, the operational processes of a large number of digital communication systems are based on input events. Therefore, discrete event-based system (DEVS) model is an appropriate tool to model such systems. On the other hand, as communication networks become more popular, congestion control becomes more vital. This necessitates the design and development of a suitable model that is able to...
This paper compares performances in two types of inter-domain path computation schemes, i.e. end-to-end and per-domain schemes. The latter is advantageous under normal traffic loads, while the former is advantageous under heavy traffic loads.
This paper proposes an adaptive resource reservation protocol for high-speed resource information advertisement. The adaptive resource reservation protocol (ARRP) is a protocol that adaptively decides whether to uses a 1-way reservation scheme or 2-way reservation scheme on the basis of resource information in the route calculation. Examples of the resource information are unreserved bandwidth and...
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