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An architecture for wireless communication between control centers and registered users in emergency situations when the cellular network is not operational is described. It is based on delay tolerant networks (DTN) and enables mobile users with multiple radio interface technologies to communicate across heterogeneous network technologies. With the help of asynchronous bundles passing from hop to...
Key management for multicast and broadcast services has been the subject of extensive research for more than 10 years. Difficulty to find an appropriate security mechanism lies in the fact that a very high number of users consume streamed protected contents simultaneously. 3GPP, IEEE and ETSI security experts have developed various Key Management Schemes (KMS) that focus on the reduction of transmission...
With the rapid development of mobile communication and the proliferation of mobile terminals, multimedia mobile business (MMB) is proposed and becomes a hot point of the research. 4G networks where the bandwidth wonpsilat be the transmission bottleneck will provide powerful support to MMB. As an important part of 4G, MANET is not capable of providing MMB because of the varying wireless channels, so...
IP over TETRA is a solid and robust platform for secure and reliable data communications in the field of public safety and in for other PMR applications. In the paper the basic concepts of WAP application over TETRA network are presented. WAP over TETRA trial architecture is shown and an example of Web application ldquodangerous goodsrdquo is demonstrated. TETRA enhanced data services offered by TETRA...
The rapid spread of IP-based Access technologies and the move towards Core Network Convergence with IMS has led to an explosion in multimedia content delivery across packet networks. IMS provides mobile and multimedia services to the customer along with fixed networks support leading to mobile and fixed convergence. The use of open standard IP protocols, defined by the IETF, allows IMS to easily introduce...
The IP Multimedia Subsystem (IMS) has emerged as next generation value added communication services including mobile multimedia broadcasting, multimedia conferencing, push to talk and presence etc on top of all IP networks. Offering multimedia streaming services across heterogeneous fixed and mobile networks have faced many challenges e.g. security, QoS, mobility and services management. In this article...
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