Abstract Stability and Fairness Issues in Layered Multicast (2009)
R. Gopalakrishnan, James Griffioen, Cormac J. Sreenan
Layered multicast is a promising technique for broadcasting adaptive-quality video to heterogeneous receivers. Past evaluation of layered multicast protocols has focused on the effectiveness of...
Reliability Control for Aggregation in Wireless Sensor Networks (2008)
Jonathan P. Benson, Cormac J. Sreenan, Utz Roedig
Abstract — Data aggregation is a method used in sensor networks to reduce the amount of messages transported. By aggregating, the data contained in several messages is fused into one single...
Worst-Case Delay Control in Multigroup Overlay Networks (2008)
Wanqing Tu, Cormac J. Sreenan, Weijia Jia
Abstract—This paper proposes a novel and simple adaptive control algorithm for the effective delay control and resource utilization of end host multicast (EMcast) when the traffic load becomes...
Technical Report CS-2006-27-11: A Performance Analysis of MANTIS and TinyOS (2008)
Cormac Duffy, Utz Roedig, John Herbert, Cormac J. Sreenan
The capabilities of a sensor network are strongly influenced by the operating system used on the sensor nodes. In general, two different sensor network operating system types are currently...
f-MAC: A Deterministic Media Access Control Protocol Without Time Synchronization (2008)
Utz Roedig, Andre Barroso, Cormac J. Sreenan
Abstract. Nodes in a wireless network transmit messages through a shared medium. Thus, a Media Access Control (MAC) protocol is necessary to regulate and coordinate medium access. For some...
Maintenance Awareness in Wireless Sensor Networks (2008)
Andre Barroso, Utz Roedig, Cormac J. Sreenan
Abstract- In wireless sensor networks where deployment is expected to surpass the lifetime of batteries, a major part of the operation costs is expected to be consumed by maintenance costs. It is...
Analysis of UDP Performance over Bluetooth (2008)
Martin Connolly, Cormac J. Sreenan
The Bluetooth protocol is one of the better-known technologies in the field of pervasive computing and is now beginning to emerge in the consumer electronics marketplace in devices such as digital...
High-Precision Ad-Hoc Indoor Positioning in Challenging Industrial Environments (2008)
Jonathan P. Benson, Cormac J. Sreenan
This paper addresses the problem of providing high-precision positioning in industrial environments. Such environments are extremely challenging due to the adverse effects of multipath fading caused...
Adrian J. Cahill, Cormac J. Sreenan
Personal Video Recorders (PVRs) such as TiVo have become very popular in recent years due to their ability to intelligently record TV content and make it accessible in an on-demand fashion to its...
System-Initiated Context Modification (2008)
To Improve Network, Utz Roedig, Cormac J. Sreenan
The conventional goal of a context-aware computer system is to improve the user's interaction with the system. But it is useful also to employ a user's context information to optimise the...
Predictable and Controllable Wireless Sensor Networks (2008)
Research activity in the area of wireless sensor networks has grown dramatically in the past few years, driven by advances in miniaturized hardware, and motivated by a vast array of potential...
Dynamic Connection Closing Time Selection for HTTP/1.1 Servers (2007)
Moncef Elaoud, Cormac J. Sreenan, Parameswaran Ramanathan, Prathima Agrawal
the throughput and the delay as perceived by a client while decreasing the server load. This is accomplished by allowing a TCP connection between
Link Cache Extensions for Predictive Routing and Repair in Ad Hoc Wireless Networks (2007)
Adrian J. Cahill, Cormac J. Sreenan
On-demand routing protocols for ad hoc wireless networks use caching in order to avoid having to perform expensive route discovery operations each time a packet is to be transmitted. In source-based...
Adding Preemption to TinyOS (2007)
Duffy, Cormac, Roedig, Utz, Herbert, John, Sreenan, Cormac J.
Event-driven operating systems such as TinyOS are the preferred choice for wireless sensor networks. Alternative designs such as MANTIS following a classical multi-threaded approach are also...
On the Effects of Aggregation on Reliability in Sensor Networks (2007)
Benson, Jonathan, Roedig, Utz, Barroso, Andre, Sreenan, Cormac J.
Data collected in a sensor network is transported hop-by-hop to a sink for further analysis. The quality of the analysis depends on the amount of data reaching the sink. Hence, data transport...
An Experimental Comparison of Event Driven and Multi-Threaded Sensor Node Operating Systems (2007)
Duffy, Cormac, Roedig, Utz, Herbert, John, Sreenan, Cormac J.
Two different operating system types are currently considered for sensor networks: event driven and multi-threaded. This paper compares the two well-known operating systems TinyOS (event driven) and...
Improving the Energy Efficiency of the MANTIS Kernel (2007)
Duffy, Cormac, Roedig, Utz, Herbert, John, Sreenan, Cormac J.
Event-driven operating systems such as TinyOS are the preferred choice for wireless sensor networks. Alternative designs following a classical multi-threaded approach are also available. A popular...
f-MAC: A Deterministic Media Access Control Protocol Without Time Synchronization (2006)
Roedig, Utz, Barroso, Andre, Sreenan, Cormac J.
Nodes in a wireless network transmit messages through a shared medium. Thus, a Media Access Control (MAC) protocol is necessary to regulate and coordinate medium access. For some application areas it...
Use of Framelets for Efficient Transmitter-Receiver Rendezvous in Wireless Sensor Networks (2005)
Andre Barroso, Utz Roedig, Cormac J. Sreenan
A basic problem introduced by the use of radio duty cycles as an energy saving technique is the need to establish rendezvous between transmitter and receiver. Since communication can only take place...
A Simple Loss Differentiation Approach to Layered Multicast (2000)
R. Gopalakrishnan, James Griffioen, Gisli Hjalmtysson, Cormac J. Sreenan, Su Wen
Abstract---Layered multicast is a promising technique for broadcasting adaptive-quality TV video to heterogeneous receivers. While several layered multicast approaches have been proposed, prior work...
A Simple Loss Differentiation Approach to Layered Multicast (2000)
R. Gopalakrishnan, James Griffioen, Cormac J. Sreenan, Su Wen
Abstract—Layered multicast is a promising technique for broadcasting adaptive-quality TV video to heterogeneous receivers. While several layered multicast approaches have been proposed, prior work...
Delay reduction techniques for playout buffering (2000)
Cormac J. Sreenan, Jyh-cheng Chen, Prathima Agrawal
Abstract--- Receiver synchronization of continuous media streams is required to deal with delay differences and variations resulting from delivery over packet networks such as the Internet. This...
A Simple Loss Differentiation Approach to Layered Multicast (2000)
R. Gopalakrishnan, James Griffioen, Gisli Hjálmtysson, Cormac J. Sreenan, Su Wen
Layered multicast is a promising technique for broadcasting adaptive-quality TV video to heterogeneous receivers. While several layered multicast approaches have been proposed, prior work has...
Challenges for Mobile Voice-Over-IP (2000)
Prathima Agrawal, Jyh-cheng Chen, Cormac J. Sreenan
The use of IP to transport voice is receiving significant attention in the telecommunications and data networking industries. Commonly known as Voice-over-IP (VoIP), this technology has the potential...
A Simple Loss Differentiation Approach to Layered Multicast (2000)
R. Gopalakrishnan, James Griffioen, Cormac J. Sreenan, Su Wen
Abstract—Layered multicast is a promising technique for broadcasting adaptive-quality TV video to heterogeneous receivers. While several layered multicast approaches have been proposed, prior work...
Stability and fairness issues in layered multicast (1999)
R. Gopalakrishnan, James Griffioen, Gisli Hjalmtysson, Cormac J. Sreenan
Layered multicast is a promising technique for broadcasting adaptive-quality video to heterogeneous receivers. Past evaluation of layered multicast protocols has focused on the effectiveness of...
An adaptive predictor for media playout buffering (1999)
Phillip Deleon, Cormac J. Sreenan
Receiver playout buffers are required to smooth network delay variations for multimedia streams. Playout buffer algorithms such as those commonly used in the Internet, autoregressively measure the...
Stability and Fairness Issues in Layered Multicast (1999)
R. Gopalakrishnan, James Griffioen, Gísli Hjálmtysson, Cormac J. Sreenan
Layered multicast is a promising technique for broadcasting adaptive-quality video to heterogeneous receivers. Past evaluation of layered multicast protocols has focused on the effectiveness of...
Use of statistical methods to reduce delays for media playback buffering (1998)
Prathima Agrawal, Jyh-cheng Chen, Cormac J. Sreenan
Receiver playback buffers are required to smooth network delay variations. A playback buffer operates by introducing additional delay, acting as a holding area for packets whose scheduled playback...
To Use or Avoid Global Clocks? (1995)
Introduction The subject of multimedia synchronization in distributed systems has been a focus of attention for several years now. Broadly speaking, individual research efforts have tended to...
Synchronisation services for digital continuous media /--by Cormac John Sreenan. (1993)
Cover title.
ENTERTAINMENT NETWORKING. (0000)
The growing convergence of broadcasting technologies and content is discussed in this special section overview article The growing convergence of broadcasting technologies and content...
The growing convergence of broadcasting technologies and content is discussed in this special section overview article The growing convergence of broadcasting technologies and content...