The importance of Quality of Service (QoS) is parallel with the recent evolution of telecommunicationnetworks, which are characterized by a great heterogeneity. On the one hand,many applications require a specific level of assurance from the network. Examples may beassured database access to retrieve information, tele-medicine, remote control of robots inhazardous environments, financial operations, purchase and delivery, tele-learning, applicationsfor emergencies and security. On the other hand, communication networks are characterizedby many levels of heterogeneity: portions managed by different Service Providers;different transmission means such as cables, satellites and radios; different implementedsolutions such as ATM, IPv4, IPv6 and MPLS. Moreover, a network may be heterogeneousalso from the point of view of users, who can require different services and have a differentavailability to pay for them.
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Friday, August 31, 2007
QoS OVER HETEROGENEOUS NETWORKS
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