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The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGN s), since the interworking environment and the service flexibility that this technology offers to the currently deployed wireless broadband technologies makes it appealing to users, service developers and network operators. In this paper a heterogeneous network model based on the IMS that...
There are two main scalable methods for streaming live video over the Internet: Content Delivery Networks (CDNs) and Peer-to-Peer (P2P) networks. Though both have their own problems, P2P streaming systems challenge delivering video with constant quality and CDNs approaches require deployment of large number of servers throughout the Internet that is costly. Recently, using hybrid architectures based...
Recent advances in multimedia software and hardware technologies and the availability of high-speed Internet service have been instrumental for growth in the online gaming industry. Multiple servers distributed across the network are commonly used to provide the desired quality-of-service (QoS) for the network game in order to achieve a higher quality-of-experience (QoE) to the players (clients)....
Nowadays, users consume a lot of functionality in their home coming from a service provider located in the Internet. While the home network is typically shielded off as much as possible from the `outside world', the supplied services could be greatly extended if it was possible to use local information. In this article, an extended service is presented that integrates the user's multimedia content,...
The mobility issue in grid environments has established new challenges to the research communities particularly in the areas of scheduling, adaptation, security and mobility. Especially, the resource allocation becomes more challenging when mobility is considered in grid environment. Hence it is necessary to consider the mobility of users along with the resource availability while scheduling the resources...
During the last years so-called ``Thin Client'' architectures have become very popular. Thin Clients are simple end user devices, which are provided with content and services by powerful servers. Originally this concept was developed for Local Area Networks (LANs), which provide a high Quality of Service. If they are used in Wide Area Networks (WANs) they need to be adjusted accordingly in order to...
IPv6 offers variety of enhancements including increased addressing capacity, Quality of Service (QoS) provisioning, built in security through IPSec and improved routing efficiency, over IPv4. But moving from the current version of IPv4 to the future version of IPv6 is not a straightforward process due to their incompatibility and will consume significant amount of time. So for the coming years both...
The 3GPP IMS is a ubiqituous communications architecture that makes Internet technologies available to any user, anywhere and at any time. The success of IMS technology will depend heavily on customer uptake of services. Network operators need to justify charging for services that are typically freely available on the Internet - one way to do this is by introducing reliability through QoS provisioning...
The QoS control can be implemented either in the centralized or distributed model. In the centralized model, the call setup signaling and resource control functions are implemented in the control/signaling servers while distributed model implements the same functions in the transport equipment. Selecting the appropriate control model is critical when deploying the real network. This paper identifies...
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