134,557 research outputs found
Monitoring of a virtual infrastructure testbed
This paper presents a SNMP-based Monitoring Agents
for Multi-Constrain Resource Scheduling in Grids
(SBLOMARS) as an effective solution for resource usage
monitoring in virtual network environments. SBLOMARS is
different to current large-scale distributed monitoring systems in
three essential aspects: Firstly, it reaches a high level of
generality by the integration of the SNMP protocol and thus,
facilitates to handle heterogeneous operating platforms.
Secondly, it is able to self-configure the polling periods of the
resources to be monitored depending of network context and
finally, it makes use of dynamic software structures to interface
with third parties, allowing to be deployed in a wide range of
devices, from simple mobile access devices to robust
multiprocessor systems or clusters with even multiple hard disks
and storage partitions. SBLOMARS has been deployed in
EmanicsLab, a virtual laboratory constituted by fourteen nodes
distributed in seven European Universities. Although the
research is not yet concluded, available results confirm its
suitability to deal with the challenges of monitoring virtual
networks.Postprint (published version
SDL based validation of a node monitoring protocol
Mobile ad hoc network is a wireless, self-configured, infrastructureless
network of mobile nodes. The nodes are highly mobile, which makes the
application running on them face network related problems like node failure,
link failure, network level disconnection, scarcity of resources, buffer
degradation, and intermittent disconnection etc. Node failure and Network fault
are need to be monitored continuously by supervising the network status. Node
monitoring protocol is crucial, so it is required to test the protocol
exhaustively to verify and validate the functionality and accuracy of the
designed protocol. This paper presents a validation model for Node Monitoring
Protocol using Specification and Description Llanguage (SDL) using both Static
Agent (SA) and Mobile Agent (MA). We have verified properties of the Node
Monitoring Protocol (NMP) based on the global states with no exits, deadlock
states or proper termination states using reachability graph. Message Sequence
Chart (MSC) gives an intuitive understanding of the described system behavior
with varying node density and complex behavior etc.Comment: 16 pages, 24 figures, International Conference of Networks,
Communications, Wireless and Mobile 201
Management system requirements for wireless systems beyond 3G
This paper presents a comprehensive description of various management system requirements for systems beyond 3G, which have been identified as a result of the Software Based Systems activities within the Mobile VCE Core 2 program. Specific requirements for systems beyond 3G are discussed and potential technologies to address them proposed. The analysis has been carried out from network, service and security viewpoints
Markov Decision Processes with Applications in Wireless Sensor Networks: A Survey
Wireless sensor networks (WSNs) consist of autonomous and resource-limited
devices. The devices cooperate to monitor one or more physical phenomena within
an area of interest. WSNs operate as stochastic systems because of randomness
in the monitored environments. For long service time and low maintenance cost,
WSNs require adaptive and robust methods to address data exchange, topology
formulation, resource and power optimization, sensing coverage and object
detection, and security challenges. In these problems, sensor nodes are to make
optimized decisions from a set of accessible strategies to achieve design
goals. This survey reviews numerous applications of the Markov decision process
(MDP) framework, a powerful decision-making tool to develop adaptive algorithms
and protocols for WSNs. Furthermore, various solution methods are discussed and
compared to serve as a guide for using MDPs in WSNs
A Lightweight and Flexible Mobile Agent Platform Tailored to Management Applications
Mobile Agents (MAs) represent a distributed computing technology that
promises to address the scalability problems of centralized network management.
A critical issue that will affect the wider adoption of MA paradigm in
management applications is the development of MA Platforms (MAPs) expressly
oriented to distributed management. However, most of available platforms impose
considerable burden on network and system resources and also lack of essential
functionality. In this paper, we discuss the design considerations and
implementation details of a complete MAP research prototype that sufficiently
addresses all the aforementioned issues. Our MAP has been implemented in Java
and tailored for network and systems management applications.Comment: 7 pages, 5 figures; Proceedings of the 2006 Conference on Mobile
Computing and Wireless Communications (MCWC'2006
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