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This paper presents a performance study of the message queue protocols that are used for binary encoded JSON data transmission in a distributed network, which is the foundation of the CNC system. The distributed architecture of the control system makes it possible to simplify the integration of automated and robotic equipment into the cyber-physical production system (CPPS) by creating an open program...
Overlay multicast is regarded as a promising way for distributing file or live stream during recent years. In this paper, we reinforce an optimal DAGs (directed acyclic graphs) construction algorithm by relaxing its partitioning and sorting conditions. We employ a realistic topology (CERNET2 backbone) to evaluate several typical types of optimal DAGs in terms of the underlay performance metrics. Simulation...
Recently, applications' demands for the network become more multifaceted. Highly functional application-to- application communication services such as bandwidth aggregation, fault tolerant communication, and delay/disruption tolerant networking (DTN) were developed independently in the network layer, the transport layer, and the application layer. As a result, protocol layering has become complicated...
Telecom operators are racing towards upgrading their facilities and broadband services in order to meet the highly challenging 5G operational framework in dense urban landscapes. The oversubscribed sub-6 GHz wireless band is lacking the necessary bandwidth to support the envisioned 5G data rates, suggesting the transition to mm-wave bands as the only viable scenario. In conjunction with the cell densification...
Internet Exchange Points (IXPs) play a key role in the Internet architecture, enabling cost-effective connections among multiple autonomous systems (ASes). The management of IXP networks includes the activity of taking care of elephant flows; they represent a small number of the total flows of an IXP, but have high impact on the overall network traffic. Managing elephant flows involves adequate identification...
Single-source HTTP Adaptive Streaming protocols (HAS), such as MPEG-DASH, have become the de-facto solutions to deliver video over the Internet. By avoiding buffer stalling events that are mainly caused by the lack of throughput at client or at server side, HAS protocols increase end-user's Quality of Experience (QoE). We propose to extend HAS capabilities to a pragmatic DASH-compliant Multiple-Source...
Software-Defined Networking (SDN) is an innovative approach to provisioning and delivering QoS (Quality of Service) services, yet it is still devoid of context-differentiating services. In this paper we propose a network application (Autonomic QoS Broker) and a controller module that implements the OpenVSwitch Database Management Protocol (OVSDB). These two components were implemented and validated...
Extending the notion of Software Defined Network (SDN) from packet switching in Layers 2 and 3 to circuit switching in transport layer for service providers is a promising scenario to meet the high burstiness and high bandwidth requirements. For service providers to have a multilayer, multi-domain controller, which can provide automated controller based restoration and protection even in unprotected...
The current design drivers for multi-cores, namely performance per watt, scalability and flexibility, make the Networks-on-Chip (NoCs) the de-facto on-chip interconnect. State of the art NoCs can exploit heterogeneous solutions and complex DVFS techniques to fulfill also the variability of the application requirements. Relevant showstoppers to the design of a truly flexible NoC fitting all the possible...
Sleep mechanism(SM) is often used to design green network, however, sleep mechanism must take data loss, network performance and other situations into consideration. Due to hierarchical and centralized control, SDN makes it simple to deploy new applications. SDN is becoming more and more popular in new network applications. In this paper, a new implementation of SM based on SDN is proposed, the SM...
Non-orthogonal multiple access (NOMA) is envisioned to be one of the promising radio access techniques for the fifth generation (5G) mobile networks. In this paper, a portable NOMA testbed based on software defined radio (SDR) is developed by transporting our NOMA system to mini personal computers (PCs). Moreover, the NOMA testbed has been enhanced from 5 MHz bandwidth to 10 MHz bandwidth. As the...
The paper focuses on the free products used to setup an Software-Defined Network by emulation and real experimentation. Because SDN networking is a challenging research area, objective of this paper is to provide assistance to researchers wishing to evaluate their SDN work in an experimental setting. In this paper, two collections of open source OpenFlow switches; Open vSwitch (OVS) and ofsoftswitch13...
Medical applications, along with Information and Communication Technology (ICT), have contributed with many solutions to support the treatment of SEPSIS. However, there are few solutions for the transport of sepsis data with Quality of Service (QoS). In this paper we propose a self-manageable architecture for the provision and delivery of sepsis data using Software-Defined Networking (SDN). To evaluate...
Multipath (MP) communication is widely used to improve the reliability of communication networks in different domains. With this regard, we have also proposed MP communication to improve communication reliability for cyber-physical systems (CPSs) when using the Internet [1]. More specifically, we proposed using different end-to-end (e2e) paths that use different pairs of Internet service providers...
In modern data centers, many flow-based and task-based schemes have been proposed to speed up the data transmission in order to provide fast, reliable services for millions of users. However, existing flow-based schemes treat all flows in isolation, contributing less to or even hurting user experience due to the stalled flows. Other prevalent task-based approaches, such as centralized and decentralized...
The various flows in production datacenters usually can be classified into two types: bandwidth-hungry and delay-sensitive. To improve their performance, datacenter networks require effective load balancing and flow control protocols, respectively. However, as the two techniques are typically employed separately in current datacenters, they are unable to optimize the network in a coordinated way....
Many video streaming services employ the dynamic adaptive streaming over HTTP (DASH) technique to achieve better user's QoE. Named-data Networking (NDN) can bring many benefits to the video distribution with in-network cache and stateful forwarding. However, simply applying DASH technique to NDN causes problems. First, in-network cache may affect download time which makes bitrate adaptation a difficult...
Distributed applications deployed in multi-datacenter environments need to deal with network connections of varying quality, including high bandwidth and low latency within a datacenter and, more recently, high bandwidth and high latency between datacentres. In principle, for a given network connection, each message should be sent over the best available network protocol, but existing middlewares...
Big data has, in recent years, revolutionised an evergrowing number of fields, from machine learning to climate science to genomics. The current state-of-the-art for storing large datasets is either object stores or distributed filesystems, with Hadoop being the dominant open-source platform for managing ‘Big Data’. Existing large-scale storage platforms, however, lack support for the efficient sharing...
Cyber-physical systems (CPSs) are emerging as a new technology, which is used to provide seamless interaction between the physical and cyber worlds. This novel paradigm is a natural evolution and extension of wireless sensor networks (WSNs) and control models to allow for effective monitoring and control of physical systems from the computing environment. In order to support this interface and allow...
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