The aim of this study is to assess the potential use of Bluetooth data for traffic monitoring of arterial road networks. Bluetooth data provides the direct measurement of travel time between pairs of scanners, and intensive research has been reported on this topic. Bluetooth data includes “Duration” data, which represents the time spent by Bluetooth devices to pass through the detection range o...

Organizations that provide centralized security monitoring of the networks of multiple third-party organizations are faced with a challenging task. The amount of security event data to be processed presents not only a technical challenge, but also a problem-solving challenge to operators. We present a model of the problem-solving process and discuss how visual support tools can facilitate the c...

This article considers a resource allocation problem for monitoring infrastructure networks facing strategic disruptions. The network operator is interested in determining the minimum number of sensors and a sensing strategy, to ensure a desired detection performance against simultaneous failures induced by a resourceconstrained attacker. To address this problem, we formulate a mathematical pro...

In order to provide high quality network management, traffic scheduling and network security, we need the per flow traffic information. However, in a highspeed net link, the flows number is so large that it is infeasible to gather and process all flows’ information accurately and efficiently. Several studies showed that a small percentage of flows account for most of the total network throughpu...

In this paper we present our WiMAX (Worldwide Interoperability for Microwave Access) network performance monitoring and optimization solution. As a new and small WiMAX network operator, there are many demanding issues that we have to deal with, such as limited available frequency resource, tight frequency reuse, capacity planning, proper network dimensioning, multi-class data services and so on...

A flow cache is a fundamental building block for flowbased traffic processing. Its efficiency is critical for the overall performance of a number of networked devices and systems. The efficiency is mainly dependent on a utilized replacement policy. This work proposes an approach based on Genetic Algorithm. The proposed approach starts from recorded traffic traces and uses Genetic Algorithm to e...

In this paper, we investigate the integration of heterogeneous network monitoring data. Specifically, we will synchronize and integrate flow-level records, exemplified by Cisco NetFlow, and packet-level traces, exemplified by NLANR PMA. The integration can facilitate crossvalidation and complementary utility. However, finding the correspondences of timestamps/flows/packets between the PMA and N...

Increases in scale, complexity, dependency and security for networks have motivated increased automation of activities such as network monitoring. We have employed technology derived from active networking research to develop a series of network monitoring systems, but unlike most previous work, made application needs the priority over infrastructure properties. This choice has produced the fol...

In network management today, dynamic updates are required for tra c engineering and for timely response to security threats. Decisions for such updates are based on monitoring network tra c to compute numerical quantities based on a variety of network and application-level performance metrics. Today’s state-of-the-art tools lack programming abstractions that capture application or session-layer...

This paper looks at the problems of real time network traffic monitoring. Some of the existing approaches are reviewed, looking at both simple filtering systems and also systems based on the use of finite state machines that can report specific events or capture data only when in particular states. Finally, some existing implementation techniques are examined and an outline proposal made for th...