ii iii ABSTRACT Now-a-days cellular technology is emerging rapidly. Based on the demand of the users, next generation cellular system is being able to provide a variety of applications for users' satisfaction. The Universal Mobile Telecommunication (UMTS) System is one of the features of cellular communication which is able to yield the different types of services as per users' satisfaction. Re...

The requirements for the QoS of distributed applications are traditionally expressed in terms of network oriented or systems oriented parameters. In general, the users of these services are not interested or capable of specifying the QoS of their services in such technical terms. In this paper, we propose modeling and engineering concepts for the mapping of end user QoS onto system and network ...

Performance of recent multimedia transmission over wireless communication systems without affecting its QoS, is a major challenge in recent mobile node communication. Cognitive radio network fulfils this requisite. Spectrum inefficiency problems due to limited spectrum resource allocation are overcome by optimization of spectrum utilization with suitable algorithms. In this paper, the importanc...

Aiming at researching the QoS performance of slotted CSMA/CA mechanism in beacon-enabled IEEE802.15.4, this paper analyzes the effect relationship between QoS and superframe parameters through analytic mathematical model and simulation method. Firstly, the nodes’ sleeping time of WSNs is deduced from duty cycle mathematical formulation. Therefore, the energy consumption directly related to slee...

With the rapid development of Internet, mobile networks and high-performance networking technology, QoS multicast routing in networks with uncertain parameters has become a very important research issue in the areas of networks and distributed systems. This is also a challenging and hard problem for the next generation Internet and high-performance networks. It attracts the interests of many pe...

The evolving fourth generation wireless networks provide heterogeneous wireless access. This feature enables the multi homed mobile devices to seamlessly roam across various wireless access technologies and to connect always to the best available access network that provides the best QOS at a minimum cost. Different applications have different QOS requirements and accordingly their choice of ac...

nowadays, a great portion of researches research and industrial innovation is about the electric vehicles (ev) and also ev supply equipment (evse) that play an important role in this context. evse requires standardization via effective communication protocols. in this paper, we propose to customize the existing internet standard routing protocol for low power and lossy networks (rpl) to facilit...

Multimedia traffic which are generally VBR in nature require efficient adaptive resource allocation schemes when supported over Mobile Networks. Admission control schemes that satisfy the desired/guaranteed QoS for multimedia applications under different traffic loads to achieve high utilization need to be designed. Packet level QoS parameters include delay, packet loss probability and jitter w...

MANETs are very advantageous and fruitful when there is no infrastructure or has been destroyed due to some reasons like earthquake, floods and so on. Data communication in MANETs are very challenging issue due to threats like limited battery power, limited bandwidth, mobility, routing and QoS and so on. Due to these challenges and scarcity of resources in MANETs, it’s very difficult to achieve...

The new communication environment has brought new requirements on the qualities of service for which the present "best effort" semantics is inadequate. The response to this evolution goes through the definition of a new model of QoS for the lower layers. In the “best effort” model, when a service provider accepts a transmission with a given QoS, it does not commit itself to any duty about the w...