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Current service platforms, e.g. Cloud solutions, do not adequately address the requirements exposed from certain kind of services like real-time services. Infrastructure as a Service Platform (IaaS) supporting these service requirements, such as quality of service of the resources provided, heavily depend on measurements in order to be able to verify that the quality of service as contracted in a...
Application areas like global sensor networks and data stream processing involve the on-line processing of large amounts of data in an overlay network of operators on top of the Internet infrastructure. Trying to fulfill QoS guarantees in such networks is a challenging task that should be realized under the requirement for optimal usage of common resources in the network. Therefore in this paper,...
Hydrocarbon Process Automation Applications (HPAA) are used in industrial plants that operate under conditions that - if not controlled - could become dangerous for people, assets and the environment. Process control systems that support the necessary functions to achieve and maintain a safe steady state HPAA operation are referred to Safety-Related (SR) systems. These systems are composed of sensors,...
DNS is an important application as a part of the procedures of most Internet applications, which means quality of DNS directly influences quality of these applications. In order to monitor and analyze user perceived end-to-end quality of DNS applications, two key parameters of DNS quality were chosen. A distributed system NQM was used to monitor various types of practical DNS services by deploying...
Surfing the Web is a practical task that is being used in activities that range from bank transactions to entertainment. Web technology is advancing in order to provide its users with better quality and advanced features. Based on networking parameters, Internet Service Providers (ISPs) want to ensure better Quality of Service for their customers. However, a question arises concerning the assessment...
In this paper we propose a Packet-based measurement technique called Floating IP Active Measurement (FIPAM) that utilizes routing loop to measure Delay and Throughput in IP networks. Calculating these parameters in multi-provider and complex networks like Internet has became a challenge as most of current active measurement tools relying on ICMP and majority of today's networks block ICMP traffics...
This paper presents a trust-based QoS management implementation to assure trust and security of the IP network. In this architecture, every IP packet is forwarded and queued by its trust-value, which is the quantification of the network's expectation of this packet's behavior in networks. We also outlined the deployment of the trusted routers which carry out this algorithm. At last we provide the...
Network congestion in the heterogeneous Internet, which is connected by millions of asynchronous systems, poses a serious threat to communication and intermediate nodes that falls under its path. The primary cause of network congestion is that data in networks are overloaded and available resources are inadequate to contain such traffic loads. An enormous amount of proposed approach towards network...
Previously, we studied the performance of transport layer multihoming (e.g., STCP). Using the emulated application of the bulk data transfer, we investigate existing overlay multicast schemes and find that all of them have a inherit performance limitation caused by tansport layer singlehoming (e.g., TCP). Based on this, we design a new overlay multicast architucture named the Hierarchy Overlay Multicast...
Internet End-to-end delay is an important QoS metric. It can be used in real-time application designing and optimizing - control system based on the Internet for example. In such applications, precisely predicted delay is needed. However, due to the complex of the Internet, end-to-end delay is dynamic and thus hard to predict. This paper first shows the jitter of end-to-end delay is chaotic based...
Introduction of differentiated services on the Internet has failed primarily due to many economic impediments. We focus on the provider competition aspect, and develop a multi-class queueing network game framework to study it. Each network service provider is modeled as a single-server multi-class queue. Providers post prices for various service classes. Traffic is elastic and there are multiple types...
Several studies have found some properties of Internet such as Triangle Inequality Violations (TIVs). The studies have reported the existence of TIV in the Internet delay space. Triangle inequality violations that are important to peer-to-peer applications can be leveraged to build overlay routing to improve peer-to-peer performance. How to select relay nodes becomes a crucial factor to overlay routing...
Network virtualization has been propounded as a key attribute of the future internetworking paradigm and is expected to play a crucial role in the next generation Internet. In network virtualization environments, service providers utilize the networking resources provided by multiple network infrastructures to offer end-to-end services. Therefore, resource allocation for end-to-end Quality of Service...
Live multimedia streaming over the Internet has steadily gained popularity over the past decade primarily fueled by the growth in the available network bandwidth and rich multimedia applications. Various approaches to support live multimedia streaming can be broadly categorized into two alternatives, namely, IP multicast based and overlay based. While IP multicast based solution is dependent on the...
In the Internet, premium services require to keep a very small delay tail probability with respect to some delay threshold. Such a small probability is difficult to measure in real time due to the large measurement variability. Practical approaches measure the traffic statistics instead and derive the tail probability by queueing analysis. In this paper, we show that an accurate estimator based on...
Concerning video transmission on the Internet, we present a model for estimating the subjective quality from objective measurements at the transmission receivers and on the network. The model reflects the quality degradation subject to parameters like packet loss ratio and bit rate and is calibrated using the results from subjective quality assessments. Besides the model and the calibration, the main...
Wireless Area Networks are commonly used for a great variety of applications. Actually, more and more people are using them as the access network technology for their home network or to access to Internet through a wireless router. In many cases, the access is performed in outdoors, not only in indoors. On the other hand, networks are experiencing a huge demand of services such as VoIP and IPTV that...
To address the problems of network congestion, Active queue management (AQM) is advocated to improve the quality of services (QoS) for Internet. Random early detective (RED) algorithm is one of notably AQM mechanism, because it could reduce the high drop rate of bursty flows, avoid global synchronization among flows and reduces network latency (“ping time”). However, RED requires careful tuning of...
In upcoming ubiquitous environment, many real-time sensing applications will emerge. These applications show different scale and characteristics on delivery demands. The applications commonly depend on real-time understanding on data from widely distributed data sources. Also, they have highly diverse and complex delivery demands in terms of data and delay, e.g., data value ranges of interest, spatial...
The effective transmission of traffic involving the sense of touch (haptics) presents a significant challenge to the current Internet architecture. It is now accepted that the Quality of Service (QoS) needed to support haptic feedback in networks will be significantly different from that used to support conventional real-time traffic such as voice or video, primarily because this traffic originates...
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