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With widespread deployment of multicast over Wireless Local Area Networks (WLANs), several issues including fixed data rate transmission, multicast key distribution security, and overlapped multicast address have to be addressed for accommodating an efficient multicast scheme for WLANs. The latter problem can be addressed by utilizing Internet Protocol version 6 (IPv6) which provides significantly...
This paper describes research, development and teaching activities in area of speech and mobile technologies like speech and audio processing, spoken language and speech-centric human-computer interaction (including speech recognition, natural language processing, dialogue management) in mobile environment, voice control of intelligent robotic systems, mobile ad-hoc networks routing protocols and...
With the advent of various access technologies and increasing number of applications, a set of challenges concerning efficient delivery of ubiquitous services to heterogeneous users and devices have been posed. One of the important challenges is to integrate quality of service (QoS), security and mobility support in heterogeneous networks. To facilitate the interworking of these mechanisms we propose...
Delivering ubiquitous services to various users and devices through heterogeneous networks is a major aim in next generation networks. The delivery should be efficient and secure. The support and integration of security, quality of service (QoS) and mobility management (MM) in access networks become parts of the essential issues. An enhanced node (EN) with a network sub-layer is proposed here to achieve...
Applications on network need not only enough quality of service (QoS) but also enough quality of security service (QoSS) because the security is essential for most of applications on network. The purpose of QoSS is to organize various security services together to achieve enough security for applications. As security requirements vary dramatically for different applications, differentiated security...
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...
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