The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The paper focuses on implementation of association pattern between the network performances and the general network faults. We use network simulation tool, OPNET, to accomplish network simulations of different network faults and different situations based on VoIP. Network performance parameters such as end-to-end delay, jitter, traffic dropped, queuing delay, link throughout, link utilization are...
Most Byzantine fault-tolerant state machine replication (BFT) algorithms have a primary replica that is in charge of ordering the clients requests. Recently it was shown that this dependence allows a faulty primary to degrade the performance of the system to a small fraction of what the environment allows. In this paper we present Spinning, a novel BFT algorithm that mitigates such performance attacks...
Session Initiation Protocol (SIP) is adopted as the main signaling protocol for the IP Multimedia Subsystem (IMS). Large deployment of SIP servers in Next Generation Networks (NGN) requires studying the behavior and performance of SIP servers under both normal and overload conditions, which may happen in such networks with a vast number of users. In this paper a measurement-based study is performed...
Currently, most research and educational backbone networks consist of 10 G-bps network and some hosts connect to this backbone with 10-Gbps. When the hosts try to transfer data with high speed, network often experiences congestion at the backbone due to a confliction with commodity traffic. In such situations, queue size at the bottleneck point has an impact on the throughput performance of TCP data...
The bandwidth measurement is essential for resource management, provisioning of network. There are many measurements techniques and tools, but the accuracy and intrusiveness of these tools are not much shown concurrently in a paper. Thus, we survey bandwidth measurement tools and evaluate performance of some well-known tools. In this paper, we present measurement results in accuracy and intrusiveness...
Jitter is, potentially, the largest source of degradation in the quality of voice in VoIP systems. This paper presents an analytical solution to the following question: How is jitter impacted by the number of hops that VoIP packets travel over and, if the end-to-end jitter were to be bounded to a predefined value, how would the resources in the network need to be scaled up as the number of hops increases?...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.