Along with the development of middleware technology, middleware has been widely used in many applications, especially in banking systems in which a three-layer structure model based on Tuxedo can be used. This model p...
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Scalability and efficient global search in unstructured peer-to-peer overlays have been extensively studied in the literature. The global search comes at the expense of local interactions between peers. Most of the un...
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ISBN:
(纸本)9781424417964
Scalability and efficient global search in unstructured peer-to-peer overlays have been extensively studied in the literature. The global search comes at the expense of local interactions between peers. Most of the unstructured peer-to-peer overlays do not provide any performance guarantee. In this work we propose a novel Quality of Service enabled lookup for unstructured peer-to-peer overlays that will allow the user's query to traverse only those overlay links which satisfy the given constraints. Additionally, it also improves the scalability by judiciously using the overlay resources. Our approach selectively forwards the queries using QoS metrics like latency, bandwidth, and overlay link status so as to ensure improved performance in a scenario where the degree of peer joins and leaves are high. User is given only those results which can be downloaded with the given constraints. Also, the protocol aims at minimizing the message overhead over the overlay network.
In IETF's Fast Mobile IPv6, the mobile node may switches into the reactive mode of handover operation when the prediction of the movement is wrong. In this case, the mobile node may experience severe service disru...
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ISBN:
(纸本)9781424417964
In IETF's Fast Mobile IPv6, the mobile node may switches into the reactive mode of handover operation when the prediction of the movement is wrong. In this case, the mobile node may experience severe service disruption due to large handover latency and packet loss. In order to solve this problem, we propose a fast mobile IP handover with multiple pre-registration. In the proposed approach, the new IP addresses are prepared in advance at multiple locations where the mobile node may probably moves into. If the predictive mode of handover operation by FMIPv6 fails, the mobile node tries to move into the previously prepared locations. Therefore, delay time of generating new care-of-address is saved. We have built a prototype system, and measure the performance of the proposed system. The experimental results show that the proposed approach can reduce greatly the handover latency.
The proceedings contain 8 papers. The topics discussed include: Typhoon: a middleware for epidemic propagation of software updates;instance-based XML data binding for mobile devices;scalable and interoperable service ...
ISBN:
(纸本)9781450310659
The proceedings contain 8 papers. The topics discussed include: Typhoon: a middleware for epidemic propagation of software updates;instance-based XML data binding for mobile devices;scalable and interoperable service discovery for future Internet;a web service for flexible integration of mobile applications with social networks;MediateSpace: decentralised contextual mediation using tuple spaces;an extensible, self contained, layered approach to context acquisition;MultiRep - asynchronous multi-device consistency;and easy-City: a route search system for public transport users.
The Globus system is intended to achieve a vertically integrated treatment of application, middleware, and network. A low-level toolkit provides basic mechanisms such as communication, authentication, network informat...
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The Globus system is intended to achieve a vertically integrated treatment of application, middleware, and network. A low-level toolkit provides basic mechanisms such as communication, authentication, network information, and data access. These mechanisms are used to construct various higher level metacomputing services, such as parallel programming tools and schedulers. The longterm goal is to build an adaptive wide area resource environment (AWARE), an integrated set of higher level services that enable applications to adapt to heterogeneous and dynamically changing metacomputing environments. Preliminary versions of Globus components were deployed successfully as part of the I-WAY networking experiment.
Enterprises are aggressively eyeing ubiquitous mobile solutions to increase the efficiency of their taskforce, but this exercise is hindered by several functional and technical challenges. For instance mobile devices ...
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ISBN:
(纸本)9781424417971
Enterprises are aggressively eyeing ubiquitous mobile solutions to increase the efficiency of their taskforce, but this exercise is hindered by several functional and technical challenges. For instance mobile devices are widely different in terms of their underlying platform capabilities, available screen real estate, input mechanisms and so on. In this work we introduce mConnect, a Context aware real time Mobile Transaction middleware which manages this device diversity in an efficient manner. mConnect abstracts the complexities of the mobile world from the existing infrastructure and seamlessly helps in extending/ creating internet based transaction solutions for mobile users with minimal or no modification to the back-end. This in turn accelerates the adoption of the mobile device as a default channel to access the Web.
Message middleware is an important branch of middleware, it provides the development of distributed application system with an asynchronous, pine for programming architecture, the consistent thought and the developmen...
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ISBN:
(纸本)9781467396332
Message middleware is an important branch of middleware, it provides the development of distributed application system with an asynchronous, pine for programming architecture, the consistent thought and the development trend of modern software technology, which is widely used in industry in the enterprise application integration and distributed computing. Message bus message middleware is a kind of simple implementation, but with its unique advantages for a wide variety of distributed applications development injected with strong power, greatly promote the development of application system integration. This paper is mainly focusing on the key issues involved in the middleware, message bus, and concurrency model for further research.
In this paper, we propose an advanced communication infrastructure of the agent-based middleware for ubiquitous computing environments. We focus on an adaptive communication mechanism between agent platforms, which ca...
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ISBN:
(纸本)9781424435692
In this paper, we propose an advanced communication infrastructure of the agent-based middleware for ubiquitous computing environments. We focus on an adaptive communication mechanism between agent platforms, which can select a suitable communication scheme flexibly, based on properties of interagent communications and resource statuses. We performed some further experiments based on the results of initial experiments by using the prototype system with the proposed mechanism. From the additional results, we confirmed that the dynamic change of inter-platform communication scheme works effectively in order to realize the inter-agent communication requirements.
The concept of spectrum sensing is, in the broad sense, the ability to detect and interpret other signals in the band and take appropriate actions by implementing adaptive techniques in the upper layers in addition to...
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ISBN:
(纸本)9781424417971
The concept of spectrum sensing is, in the broad sense, the ability to detect and interpret other signals in the band and take appropriate actions by implementing adaptive techniques in the upper layers in addition to traditional interference cancellation techniques applied in the PHY layer. In this paper we present algorithms to trigger and detect interference from microwave oven for WLAN devices in the 2.4GHz spectrum and methods to mitigate the impact from the interference. The concept can be extended to other coexistence issues as well as spectrum sharing between primary and secondary users.
Futures traders increasingly use program trading systems for one or more stages of the trading process. In order to stay competitive, futures firms have to rely more on their program trading systems to increase their ...
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