*Ismail Ali, Sandro Moiron, Martin Fleury and Mohammed Ghanbari University of Essex, Colchester CO4 3SQ, United Kingdom ABSTRACT This paper considers the impact of data partitioning form on wireless network access control and proposes a selective dropping scheme based on dropping the partition carrying intra-coded macroblocks. Data partitioning is an error resiliency technique that allows une...

This paper studies the security issues that arise in an overlay multicast architecture where service providers distribute content such as web pages, static and streaming multimedia data, realtime stock quotes, or security updates to a large number of users. In particular, two major security problems of overlay multicast, network access control and group key management, are addressed. We first p...

This paper studies the security issues that arise in an overlay multicast architecture where service providers distribute content such as web pages, static and streaming multimedia data, realtime stock quotes, or security updates to a large number of users. In particular, two major security problems of overlay multicast, network access control and group key management, are addressed. We first p...

Floor control is a means to manage joint or exclusive access to shared resources in a (multiparty) conferencing environment. Thereby, floor control complements other functions -such as conference and media session setup, conference policy manipulation, and media control -that are realized by other protocols. This document defines the requirements for a floor control protocol for multiparty conf...

This paper proposes a protocol independent Dynamic Addressing scheme for Wireless Media Access Protocols, and discusses related systems and performance issues. Dynamic Addressing allows spatial and temporal reuse of MAC addresses, thereby reducing the address size by a factor of 8. This reduces the control overhead in a MACAW 2] style protocol by 30% to 70%, and produces an overall performance ...

We propose an efficient uplink MAC protocol for a variable spreading gain interference-limited WCDMA system. It can, with high spectral efficiency, support both real-time traffic like speech and video and also non-real-time data traffic based on packet transmission. The schemes for power allocation, scheduling, and transmission rate adaptation for non-real time data traffic schemes are designed...

The fundamental theme for the research performed under the subject grant is the exploitation of receiver statistics that are obtained as packets are being demodulated and decoded in tactical cognitive radio networks. We employ receiver statistics to provide control information for adaptive protocols, improve soft-decision decoding, permit spectrum sensing while communicating, and form silencing...

The fundamental theme for the research performed under the subject grant is the exploitation of receiver statistics that are obtained as packets are being demodulated and decoded in tactical cognitive radio networks. We employ receiver statistics to provide control information for adaptive protocols, improve soft-decision decoding, permit spectrum sensing while communicating, and form silencing...