Java for On-line Distributed Monitoring of Heterogeneous Systems and Services

Bellavista, Paolo; Corradi, Antonio; Stefanelli, Cesare

doi:10.1093/comjnl/45.6.595

Cited by 10 publications

(8 citation statements)

References 33 publications

(47 reference statements)

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“…ubiQoS proxies integrate standard RTP report transmissions with event-triggered exchanges of QoS-related information provided by SOMA monitoring [20]. This permits to overcome the RTP limit related to the frequency of reports, which is statically determined in RTP as a fixed percentage of the maximum network bandwidth available at the time of connection establishment [24].…”

Section: Resultsmentioning

confidence: 99%

“…This requirement is hard to grant because most MA platforms are implemented in Java and the Java Virtual Machine (JVM) tends to hide kernel-level system properties. However, some work has recently achieved interesting results in extending the monitoring visibility of Java MAs, with/without modifying the standard JVM [19,20].…”

Section: Mobile Agents For Qos-aware Active Service Infrastructuresmentioning

confidence: 99%

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Active middleware for Internet Video on Demand: the QoS-aware routing solution in ubiQoS

Bellavista¹,

Corradi²

2003

Microprocessors and Microsystems

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Several factors are forcing to address the issues of differentiated Quality of Service (QoS) and ubiquitous accessibility in Internet services, from growing user requirements to the increasing heterogeneity of access devices, from the competition of service providers to the severe constraints of resource availability in emerging wireless environments. The paper claims that the provision of services with negotiated and controlled QoS over best-effort networks is achievable via distributed support infrastructures that activate some of the nodes along the network path between clients and servers. The paper proposes mobile agents (MAs) as the activation technology to implement the needed active infrastructure and the MA-based design and implementation of the ubiQoS middleware for Video on Demand. At the starting of the service session, ubiQoS establishes an active path of intermediate nodes capable of tailoring multimedia flow QoS depending on profiles of user preferences and of device characteristics; at provision time, ubiQoS monitors the offered quality and promptly react to changes in resource availability by locally performing multimedia transcoding/downscaling and resource pre-emption. In particular, the paper focuses on how it is possible to determine dynamically a QoS-aware active path between clients and servers, discusses alternative solutions, and evaluates the performance results of the completely decentralized Peer-to-Peer implementation of the active path determination in ubiQoS. q

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Section: Resultsmentioning

confidence: 99%

Section: Mobile Agents For Qos-aware Active Service Infrastructuresmentioning

confidence: 99%

Active middleware for Internet Video on Demand: the QoS-aware routing solution in ubiQoS

Bellavista¹,

Corradi²

2003

Microprocessors and Microsystems

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“…We have already developed all Mechanisms Layer modules described in [15] [16] [17]. The facility core modules implemented in the first MUM prototype are the Configuration and the Nomadic Session Handoff Facility.…”

Section: The Configuration and Nomadic Session Handoff Facilitiesmentioning

confidence: 99%

MUM: a middleware for the provisioning of continuous services to mobile users

Bellavista

Corradi

2004

Proceedings. ISCC 2004. Ninth International Symposium on Computers and Communications (IEEE Cat. No.04TH8769)

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“…Our solution is mobile in the sense that accounting middleware components can migrate where needed depending on client mobility patterns by exploiting a Mobile Agent (MA)-based implementation. The roaming accounting system is built on top of the Secure and Open MA (SOMA) platform and exploits a layer of portable middleware components for application-level monitoring and charging [4] [5].…”

Section: Qwurgxfwlrqmentioning

confidence: 99%

“…In fact, each SOMA execution environment is equipped with a highly configurable and dynamically extensible monitoring module that can trace the usage of different types of resources, at both the system level and the application one. MMAs locally configure the monitoring modules only to trace the resource consumptions that are specified in their metering logic and needed for their user-specific charging; this permits to effectively tune the intrusiveness of on-line monitoring and to significantly reduce its overhead [5].…”

Section: Rdplqj $Ffrxqwlqj $Ufklwhfwxuhmentioning

confidence: 99%

Application domain accounting for roaming services

Bellavista

Corradi

Vecchi

The Ninth IEEE Workshop on Future Trends of Distributed Computing Systems, 2003. FTDCS 2003. Proceedings.

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The spectrum of Internet-based services offered to final users is continuously enlarging, by considering service provisioning to clients connected to either fixed networks or mobile ones. In addition, the organization requirements connected to the increasing capabilities of wireless access devices are deeply modifying the service provisioning process. On the one hand, 3G mobile networks should support services that present the same richness and variety of the ones provided to fixed environments. On the other hand, the availability of very heterogeneous portable devices is likely to change some aspects of service provisioning, for instance by forcing to consider service delivery anywhere and anytime with an ad-hoc dynamic adaptation to the properties of the current access terminals.This new perspective calls for services that can be provided to users while they roam in a globally distributed network with their wireless portable devices connected to local/global service providers (SPs) [1,2]. Client roaming is a widely common telecom service functionality, which is supported by most cellular phone operators; we claim that a similar concept of client roaming needs to be extended to the emerging novel classes of Internet-based mobile services. Similarly as a phone user roams and seamlessly passes between possibly different network operators, roaming customers of Internetbased mobile services should subscribe to a specific service and should have the possibility to connect to the most suitable SP available, e.g., depending on the client location. Let us consider a city guide service allowing clients to get information about shops, restaurants, and cinemas. A user should have the possibility to subscribe to one single SP providing the city guide, and to access the service even while roaming in other cities where other SPs offer a similar service. In addition, tourist information should be dynamically adapted to fit the specific access device visualization capabilities and should be filtered according to the specified/exhibited user preferences. In the following, we indicate such novel class of services as 5RDPLQJ 6HUYLFHV.Roaming service scenarios raise several challenging issues to investigate and solve. The paper specifically explores the accounting area, i.e., how to collect and manage the resource usage information in roaming service provisioning for charging and billing purposes. The resources to be considered in the accounting process are very heterogeneous in nature and in their possible implementation, spanning from used network bandwidth to consumed processor time and memory, from the size of actually received data to the exploited functions for dynamic adaptation. In the provisioning of roaming services, we can distinguish between the accounting part related to pure network connectivity and the accounting part associated with application-level service aspects. For instance, in the city guide service, the network operator can be interested in accounting roaming users for the time they exploit the network conn...

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Java for On-line Distributed Monitoring of Heterogeneous Systems and Services

Cited by 10 publications

References 33 publications

Active middleware for Internet Video on Demand: the QoS-aware routing solution in ubiQoS

Active middleware for Internet Video on Demand: the QoS-aware routing solution in ubiQoS

MUM: a middleware for the provisioning of continuous services to mobile users

Application domain accounting for roaming services

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