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This paper proposes a method of TCP multi-pathization for IoT network by SDN. The method distributes packets according to the congestion between paths and IP packet length. Since it is performed over SDN, no changes of existing protocols and devices are required. The authors implement the method by actual IoT devices and evaluate QoS by experiment. The results of the experiment show that the TCP throughput...
Most of IoT applications include large number of distributed sensors which are interesting in specific geographical area. A large number of IoT entities have multiple relations and dynamic connections with each other. And there are many group communication requirements. Flexible multicast mechanism will be essential in such environments but it is difficult to satisfy verious requirements by means...
Growing demands for mobile services in recent years has extraordinary increased the number of cellular operators and consequently the portion of energy that is consumed by cellular networks. Hence, green cellular network has been introduced, which suggests the use of energy optimization methods in cellular networks. One of the solutions to optimize the energy consumption of cellular networks is to...
As demands on new software increase, new approaches are needed to help developers ensure Quality of Service (QoS) for their offered service. In this paper we present a QoS modeling approach that complements and extends the standard microservice and component-based software engineering tools by giving the software engineer information on what Non-Functional Requirements (NFRs) and quality constraints...
The designers of computing systems have interested on the improvements of computing performance that are driven by the demand of consumer, business, and scientific applications. However, further growth of computing performance has started to be limited due to the increasing energy consumption of cloud data centres as a result of carbon dioxide footprints and overwhelming electricity bills. Therefore,...
Future mixed-criticality systems must handle a growing variety of traffic requirements, ranging from safety-critical real-time traffic to bursty latency-sensitive best-effort traffic. Additionally, safety standards (e.g. ISO 26262) require sufficient independence among different criticality levels for mixed-criticality systems. Networks-on-Chip (NoCs), as a scalable and modular interconnect, are used...
In modern wireless networks, optimizing the association between base stations (BSs) and users effectively improves network performance. On the other hand, a frequently changing BS-user association renders considerable operational burden for network management, e.g., it consumes extra power to awaken the deactivated BSs and to support users' switching among BSs. This motivates us to balance the flexibility...
Currently, the contradiction between the rapid growth of network traffic and the limited network resource is plaguing network operators and Internet users. In this paper, we conduct a survey on how to build efficient streaming systems in edge network under SDN (software defined networking) architecture and on how to manage the large traffic in core network caused by file transferring and media streaming...
We use statistical learning to estimate end-to-end QoS metrics from device statistics, collected from a server cluster and an OpenFlow network. The results from our testbed, which runs a video-on-demand service and a key-value store, demonstrate that the learned models can estimate QoS metrics like frame rate or response time with errors bellow 10% for a given client. Interestingly, we find that service-level...
Software Defined Networking (SDN) is the key technology for combining networking and Cloud solutions to provide novel applications. SDN offers a number of advantages as the existing resources can be virtualized and orchestrated to provide new services to the end users. Such a technology should be accompanied by powerful mechanisms that ensure the end-to-end quality of service at high levels, thus,...
The paper proposes to use a solution based on software-defined networks (SDN) to control traffic flows in wireless local area networks (Wi-Fi). The paper examines the testing methods for a software-configurable wireless local area network based on the model network of the St. Petersburg State University of Telecommunications. Classify traffic based on DSCP values in the IP-headers of packets. After...
The main goal of this paper is to manage the switching on/off of servers in a data center during time to adapt the system with incoming traffic changes to ensure a good performance and a reasonable energy consumption. In this work, the system is modeled by a queue then, an optimization algorithm is designed to manage energy consumption and quality of service in the data center. For several systems,...
Due to the centralized control, network-wide monitoring and flow-level scheduling of Software-Defined-Networking (SDN), it can be utilized to achieve Quality of Service (QoS) for cloud applications and services, such as voice over IP, video conference and online games, etc. However, most existing approaches stay at the QoS framework design and test level, while few works focus on studying the basic...
Conventional planning and optimization of cellular networks for supporting the peak-time user demand leads to substantial wastage of electrical energy. Therefore, we propose an energy-aware dynamic network provisioning framework for realizing green mobile cellular systems by reducing energy consumption in access networks. Proposed mechanism allows base stations (BSs) to offload their entire traffic...
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...
Context-oriented computing has introduced new challenges in Quality of Service (QoS) management since the diversity of applications, forms of access and the TCP/IP architecture model make it difficult to provide services aware of Quality of Experience (QoE). In view of that, we propose an autonomous architecture of service provision and delivery that is QoE aware. The proposed components were designed...
Software-defined networking (SDN) is a promising future network architecture which introduces new dimensionsin flexibility and adaptability to cope with different Quality of service (QoS) metrics, such as latency constraint, loss rate, etc. In this paper, we provide differentiated Services for flows of a topic-oriented publish/subscribe system to address some of the QoS guarantee issues, by leveraging...
With software defined networking rapidly becoming industry default, the cut-through mode of switching is becoming increasingly harder to achieve in practice. On the other hand, cut-through networking remains firmly in focus in several fields where top network performance is required, where supercomputing and datacenter interconnect are two popular examples. In earlier work, cut-through mode on end-to-end...
As base stations (BS) are responsible for the large amount of energy consumed in cellular networks, energy efficient BS sleep mode techniques have the potential to save a significant amount of energy. However, assuming that BSs are able to alternate between sleeping and active states as frequently as possible may have a negative impact on network reliability, shortening BS lifetime. In this paper...
Currently deployed backbone/metro networks rarely supports dynamically configurable multicasting. One of the major reasons is the high complexity and low scalability of current multicasting solutions. Alternative multicasting solutions are emerging based on Software Defined Networking (SDN), indeed, using a central controller simplifies the multicast tree management but still requires the explicit...
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