tailieunhanh - Resource Management in Satellite Networks part 11

Resource Management in Satellite Networks part 11. This book provides significant knowledge on innovative radio resource management schemes for satellite communication systems that exploit lower layer adaptivity and the knowledge of layer 3 IP QoS support and transport layer behavior. The book integrates competencies considering all the parts of system design: propagation aspects, radio resource management, access protocols, network protocols, transport layer protocols, and more, to cover both broadband and mobile satellite systems | 80 José Ignacio Moreno Novella Francisco Javier Gonzalez Castaño QoS also over different networks. The QoS broker may also be responsible for managing inter-domain communications with neighbor QoS brokers so that QoS-enabled transport services are implemented in a coordinated way across various domains. Since IntServ requires resource reservation it is the most evident scenario to integrate a QoS broker. In IntServ a RSVP enabled router may consult the QoS broker using the Common Open Policy Service COPS protocol about the decision to take when receiving RSVP path or reservation messages. The decision taken by the QoS broker is normally conveyed in a COPS message and then enforced by the router. In DiffServ the edge routers need to perform admission control and may also outsource the decision to the QoS broker. This process can take place when the DiffServ access router detects a new traffic the level of detail to define new traffic may vary as we just explained. QoS brokers functionally can go beyond taking policing decisions generally they are also in charge of managing the network. The actual role of the QoS broker may adapt to the different scenarios and business models. For instance in the scenario described in Section the recovery provider may consult a QoS broker before gathering data from the content providers and sending it to the satellite so that this broadcasts it. Many existing approaches combine IntServ and DiffServ IntServ in the access part of the network and DiffServ in the core network. Of course solutions based on other paradigms also exist and are even complementary to these ones. For example 15 proposes new routing schemes over high availability networks. Broadcast and multicast services In addition to DVB-S broadcast satellite IP multicast for content distribution to the edge of the Internet and to corporate sites has numerous advantages over terrestrial technology. Satellites offer highly regular broadband data streams and a single