Online Estimation of Battery Lifetime for Wireless Sensors Network

Battery is a major hardware component of wireless sensor networks. Most of them have no power supply and are generally deployed for a long time. Researches have been done on battery physical model and their adaptation for sensors. We present an implementation on a real sensor operating system and how architectural constraints have been assumed. Experiments have been made in order to test the impact of some parameter, as the application throughput, on the battery lifetime

SecSip: A Stateful Firewall for SIP-based Networks

SIP-based networks are becoming the de-facto standard for voice, video and instant messaging services. Being exposed to many threats while playing an major role in the operation of essential services, the need for dedicated security management approaches is rapidly increasing. In this paper we present an original security management approach based on a specific vulnerability aware SIP stateful firewall. Through known attack descriptions, we illustrate the power of the configuration language of the firewall which uses the capability to specify stateful objects that track data from multiple SIP elements within their lifetime. We demonstrate through measurements on a real implementation of the firewall its efficiency and performance

Performance of Network and Service Monitoring Frameworks

The efficiency and the performance of anagement systems is becoming a hot research topic within the networks and services management community. This concern is due to the new challenges of large scale managed systems, where the management plane is integrated within the functional plane and where management activities have to carry accurate and up-to-date information. We defined a set of primary and secondary metrics to measure the performance of a management approach. Secondary metrics are derived from the primary ones and quantifies mainly the efficiency, the scalability and the impact of management activities. To validate our proposals, we have designed and developed a benchmarking platform dedicated to the measurement of the performance of a JMX manager-agent based management system. The second part of our work deals with the collection of measurement data sets from our JMX benchmarking platform. We mainly studied the effect of both load and the number of agents on the scalability, the impact of management activities on the user perceived performance of a managed server and the delays of JMX operations when carrying variables values. Our findings show that most of these delays follow a Weibull statistical distribution. We used this statistical model to study the behavior of a monitoring algorithm proposed in the literature, under heavy tail delays distribution. In this case, the view of the managed system on the manager side becomes noisy and out of date

Intrusion detection mechanisms for VoIP applications

VoIP applications are emerging today as an important component in business and communication industry. In this paper, we address the intrusion detection and prevention in VoIP networks and describe how a conceptual solution based on the Bayes inference approach can be used to reinforce the existent security mechanisms. Our approach is based on network monitoring and analyzing of the VoIP-specific traffic. We give a detailed example on attack detection using the SIP signaling protocol

Internet Services:Management Beyond the Element - A Report on DSOM'2001

The report from Annual International Workshop on 'Distributed Systems: Operations and Management' is presented. The theme of workshop was 'Internet services: management beyond the element' which reflected the shift within current Internet from managing isolated network elements to managing integrated end-to-end services. The topics discussed at workshop included service provisioning, application management, customer care, QoS management, policy languages and IP applications. The tutorial on 'JMX in Java & Management Environments' described status of JMX and possible ways to integrate JMX in JAVA environment

jYang : A YANG parser in java

The NETCONF configuration protocol of the IETF Network Work- ing Group provides mechanisms to manipulate the configuration of network devices. YANG is the language currently under consideration within the IETF to specify the data models to be used in NETCONF . This report describes the design and development of a syntax and semantics parser for YANG in java

The Managed Object Format Specification Parser of the MODERES Java Toolkit

MODERES Java is an environment for the development of management information models. This environment aims at providing a set of tools for the manipulation of information models coming from different management frameworks. These tools include parsers, mapping and back-end facilities as well as navigation features within specifications. This report presents one component of the environment, i.e. the MOF (Managed Object Format) syntax parser. MOF is the notation defined within the WBEM (Web-Based Enterprise Management) framework as part of the Common Information Model (CIM). This report contains a detailed description of the model as well as a complete implementation and usage guide for the syntax parser implemented within the MODERES environment

The GDMO and GRM Modules Semantic Checker of the MODERES Java Toolkit

MODERES Java is an environment for the development of management information models. In its first release, it provides tools for the manipulation of information models specified using GDMO and GRM. This report presents one component of the environment, i.e. the GDMO/GRM modules semantic checker. The report contains a detailled description of performed verifications as well as a complete implementation and usage guide for the semantic checker as implemented within the environment

MODERES Java: Architecture and Core Packages

MODERES is an environment for the development of management information models. The initial release of the environment was developped in C++ and provided tools for the manipulation of information models specified using GDMO and GRM. This report presents the architecture and core packages of the MODERES Java environement. This environement is completely developped in Java and contains the initial MODERES tools as well as a new architecture for the use of the MODERES suite in an enterprise network