DMCA
Supporting End-to-end Quality of Service Properties in OMG Data Distribution Service Publish/Subscribe Middleware
BibTeX
@MISC{_supportingend-to-end,
author = {},
title = {Supporting End-to-end Quality of Service Properties in OMG Data Distribution Service Publish/Subscribe Middleware},
year = {}
}
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Abstract
Assuring end-to-end quality-of-service (QoS) in distributed real-time and embedded (DRE) systems is hard due to the heterogeneity and scale of communication networks, transient behavior, and the lack of mechanisms that holistically schedule different resources end-to-end. This paper makes two contributions to research focusing on overcoming these problems. First, it provides an analytical approach to bound the delays incurred along the critical path in a typical DRE publish/subscribe stream, which helps ensure predictable end-to-end delays. Second, it presents the design and evaluation of a policy-driven framework called Velox. Velox combines multi-layer, standards-based technologies— including the OMG Data Distribution Service (DDS) and IP DiffServ—to support end-to-end QoS in heterogenous networks and shield applications from the details of network QoS mechanisms by specifying per-flow QoS requirements. The results of empirical tests conducted using Velox show how combining DDS with DiffServ enhances the schedulability and predictability of DRE applications, improves data delivery over heterogeneous IP networks, and provides network-level differentiated performance.
Keyphrases
end-to-end quality service property critical path communication network analytical approach network-level differentiated performance different resource shield application end-to-end qos predictable end-to-end delay data delivery ip diffserv heterogeneous ip network typical dre publish subscribe stream heterogenous network dre application empirical test end-to-end quality-of-service transient behavior policy-driven framework standards-based technology network qos mechanism combining dd per-flow qos requirement omg data distribution service
