2021 IEEE 23rd Int Conf on High Performance Computing & Communications; 7th Int Conf on Data Science & Systems; 19th Int Conf on Smart City; 7th Int Conf on Dependability in Sensor, Cloud & Big Data Systems & Application (HPCC/DSS/SmartCity/DependSys)
2018 IFIP Networking Conference (IFIP Networking) and Workshops, 2018
Much attention of the research community has focused on performance analysis of cache networks un... more Much attention of the research community has focused on performance analysis of cache networks under various caching policies. However, the issue of how to evaluate and compare caching policies for cache networks has not been adequately addressed. In this paper, we propose a novel and general framework for evaluating caching policies in a hierarchical network of caches. We introduce the notion of a hit probability/rate matrix, and employ a generalized notion of majorization as the basic tool for evaluating caching policies for various performance metrics. We discuss how the framework can be applied to existing caching policies, and conduct extensive simulation-based evaluation to demonstrate the utility and accuracy of our framework.
Receiver adaptation layered multicast video has been pro- posed to address the issue of network b... more Receiver adaptation layered multicast video has been pro- posed to address the issue of network bandwidth heterogeneity in multi- party video communication over networks. An important issue in this ap- proach is how to conduct layer adaptation to achieve the "optimal level" of subscription to maximize the perceived video quality at receivers while uti- lize bandwidth efficiently. In the current work, optimal layers are typically determined by congestion signals fed back from networks. This approach implies that instantaneous congestion is a key parameter; however, in ran- dom traffic, such an implication somewhat under-estimates other parame- ters. In order to investigate the performance of "layer adaptation" in random traffic for improving the network-based multi-party video communication system, in this paper we present an analytical studying of the issue of re- ceiver layer adaptation for layered video transmission. In this work, we use the notion of congestio...
2021 IEEE 23rd Int Conf on High Performance Computing & Communications; 7th Int Conf on Data Science & Systems; 19th Int Conf on Smart City; 7th Int Conf on Dependability in Sensor, Cloud & Big Data Systems & Application (HPCC/DSS/SmartCity/DependSys)
2018 IFIP Networking Conference (IFIP Networking) and Workshops, 2018
Much attention of the research community has focused on performance analysis of cache networks un... more Much attention of the research community has focused on performance analysis of cache networks under various caching policies. However, the issue of how to evaluate and compare caching policies for cache networks has not been adequately addressed. In this paper, we propose a novel and general framework for evaluating caching policies in a hierarchical network of caches. We introduce the notion of a hit probability/rate matrix, and employ a generalized notion of majorization as the basic tool for evaluating caching policies for various performance metrics. We discuss how the framework can be applied to existing caching policies, and conduct extensive simulation-based evaluation to demonstrate the utility and accuracy of our framework.
Receiver adaptation layered multicast video has been pro- posed to address the issue of network b... more Receiver adaptation layered multicast video has been pro- posed to address the issue of network bandwidth heterogeneity in multi- party video communication over networks. An important issue in this ap- proach is how to conduct layer adaptation to achieve the "optimal level" of subscription to maximize the perceived video quality at receivers while uti- lize bandwidth efficiently. In the current work, optimal layers are typically determined by congestion signals fed back from networks. This approach implies that instantaneous congestion is a key parameter; however, in ran- dom traffic, such an implication somewhat under-estimates other parame- ters. In order to investigate the performance of "layer adaptation" in random traffic for improving the network-based multi-party video communication system, in this paper we present an analytical studying of the issue of re- ceiver layer adaptation for layered video transmission. In this work, we use the notion of congestio...
Uploads
Papers by Zhi-Li Zhang