This paper presents a new approach for adapting a multimedia presentation into heterogeneous and dynamically changing environments. A novel media adaptation taxonomy is proposed that includes synchronized media optimization and scaling. The taxonomy incorporates multi-dimensional interaction between media, service requirements and presentation. Network properties, terminal types and integration...

M.-T. Schmidt B. Hutchison P. Lambros R. Phippen The Enterprise Service Bus (ESB) is the infrastructure which underpins a fully integrated and flexible end-to-end service-oriented architecture (SOA). This paper details the essential meta-data and capabilities of the ESB. It presents a summary of the key concepts of the ESB and defines the integration model for it, including key user roles. Thes...

As data volumes continue to grow, modern database systems increasingly rely on data skipping mechanisms to improve performance by avoiding access to irrelevant data. Recent work [39] proposed a fine-grained partitioning scheme that was shown to improve the opportunities for data skipping in row-oriented systems. Modern analytics and big data systems increasingly adopt columnar storage schemes, ...

Quality of Service (QoS) in distributed systems supporting real-time and multimedia applications must be guaranteed system-wide, including end-systems, communications systems and networks. This paper concentrates primarily on the transport layer of such a system but also describes a generalised Quality of Service Architecture (QoS-A) used to specify and implement application defined QoS over al...

This paper discusses the specifications, methods, and constructs to implement end-to-end Service Oriented Architecture (SOA)-based systems engineering across a federation of information domains. It addresses the necessity and benefits of a repeatable service design framework and its ability to consistently yield quantifiable results for SOA performance evaluation. An illustrative example of the...

Negotiating multiple SLAs in itself is not sufficient to guarantee end-to-end QoS levels as SLAs in practice often give probabilistic QoS guarantees and SLA violations can still occur. Moreover probabilistic QoS guarantees do not necessarily capture time-dependent behavior, (e.g., short term service degradations). Therefore, the negotiation of SLAs needs to be supplemented with run-time QoS-con...

Future wireless networks promise multimedia communication and computing services for both fired and mobile users. One of the most important challenges of wireless multimedia service for mobile users is maintaining a guaranteed quality of service over end-to-end connections with multiple mobile endpoints. In this papes we describe a new handoff rerouting scheme that supports multimedia trafic in...

In this paper, we present methods to provide faulttolerant real-time communication over ATM networks. Specifically, we are concerned with messages that have to be delivered by their deadlines even in the presence of faults. Connection-oriented communications service is well-suited for mission critical applications that demand delay guarantees. A critical part of connection oriented communicatio...