A modern communication network?can be described as?a large, complex, distributed system composed by higher interoperating, smaller sub-systems. Today, the proliferation and convergence of different types of wired, wireless, and mobile networks are crucial for the success of the next generation networking.?However, these networks can hardly meet the requirements of future integrated-service networks, and are expected to carry multimedia traffic with various Quality of Experience (QoE) and Quality of Service (QoS) requirements. Providing all relevant QoS/QoE issues in these heterogeneous networks is then an important challenge for telecommunication operators, manufacturers, and companies. The impressive emergence and the important demand of the rising generation of real-time Multi-service (such as Data, Voice VoD, Video-Conference, etc.) over communication heterogeneous networks, require scalability while considering a continuous QoS.? This book presents and explains all the techniques in new generation networks which integrate efficient global control mechanisms in two directions: (1) maintain QoS requirements in order to maximize network resources utilization, and minimize operational costs on all the types of wired-wireless-mobile networks used to transport traffic, and (2) mix the QoS associated with home, access, and core networks in order to provide Quality of Service/Quality of Experience expected by users of new services.Simulations and numerical results In order to evaluate the performance of this technique, a set of simulations and experiments ... NS2 is a freely available discrete-event object-oriented network simulator, written in C++ language with an OTcl interpreter. ... Half of the traffic sources are high priority (for example: TSI application) and rest of them are low priority. ... hoc on-demand distance vector ( AODV) routing protocol, and IEEE 802.1 1b is used for the wireless MAC protocol [ROY 00].
|Title||:||Quality of Service Mechanisms in Next Generation Heterogeneous Networks|
|Publisher||:||Wiley-ISTE - 2009-01-20|