Achieving all the time, everywhere access in next-generation mobile networks

Cinque, Marcello; Cotroneo, Domenico; Russo, Stefano

doi:10.1145/1072989.1072994

Cited by 9 publications

(7 citation statements)

References 18 publications

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“…Such hand-off procedures are both horizontal and vertical, which means that the CLM is able to connect a mobile device to WAPs of the same or different technologies. Addressing heterogeneity at the data-link level represents an important step for pursuing the realization of the next-generation wireless Internet scenarios [17]. Built upon the CLM services, NCSOCKS provides a transport level object-oriented API that enables developers to be aware of mobility and wireless network conditions.…”

Section: The Esperanto Broker Corementioning

confidence: 99%

The Esperanto Broker: a communication platform for nomadic computing systems

2006

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There is an increasing demand for middleware for nomadic computing applications. Owing to the inherent characteristics of such environments, these platforms have to address two fundamental issues: (i) device disconnections and the limitations of wireless networks may force users to experience short periods of service unavailability; and (ii) the complexity to design and develop next-generation mobile computing applications. This paper proposes the Esperanto Broker (EB), a communication platform that addresses mobility issues via an integrated approach, i.e. at data-link, network, and middleware levels. Decoupling interactions are achieved via a tuple-space underlying infrastructure. To support developers with advanced services, the EB enhances the distributed objects computing model providing the abstraction for the communication paradigms standardized by the W3C. Esperanto applications can be modeled as sets of objects that are distributed over mobile devices, which communicate via remote method invocations (RMIs). RMIs natively implement pull and push models, in both one-to-one and one-to-many multiplicity. The paper focuses on the EB design issues, essential aspects of the implementation, and performance evaluations of the implemented prototype. INTRODUCTIONRecent advantages achieved in wireless and in low-power consumer electronics have lead to new computing paradigms, generally described as mobile computing. Nomadic computing (NC) is a form of mobile computing where the communication may take place during users' movements between different service locations such as their office, home, hotel, airport, car, and so on [1][2][3]. Nowadays, the interest in middleware for NC environments is still growing as such infrastructures are becoming increasingly widespread: suffice to say, telecom operators are competing to quickly interconnect different wireless networks (such as GSM, UMTS, and Wi-Fi) to make the Wireless Internet the cuttingedge market where new services can be provided at a huge profit.Focusing on distributed communication, NC middleware must deal with new challenging issues that are mainly the result of the inherent characteristics of wireless networks and mobile devices [4,5]. Weak connectivity or battery power constraints may lead users to experience short periods of service unavailability. Moreover, users may initiate a communication just before traveling from office to home. Even if the network connection is available both outdoor and indoor (e.g. via GSM and Wi-Fi) switching from one technology to another may lead to a disconnection. Therefore, the temporary unavailability of counterparts is the rule rather than the exception. If traditional communication mechanisms required both counterparts to be available during the interaction, mobile computing requires mechanisms to let users communicate in a loosely coupled fashion.From the software development perspective, the development of next-generation mobile computing applications needs to rely on high-level abstractions and advanced services. Mobile ...

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Section: The Esperanto Broker Corementioning

confidence: 99%

The Esperanto Broker: a communication platform for nomadic computing systems

2006

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“…For example, see Figure 1, a device that is leaving stand B.1 will attempt to connect only with the AP serving stand B.2. Further details about the LSSH scheme are available in [7].…”

Section: Bt Handoff Managementmentioning

confidence: 99%

“…Nomadic Computing SOCKetS (NCSOCKS) [7] are a common facility which provides service developers with an object-oriented communication API specifically suited for general purpose mobility-aware applications. They can be thought as a uniform, basic communication support that abstracts the actual communication channel being used.…”

Section: Ncsocksmentioning

confidence: 99%

Integrated support for handoff management and context awareness in heterogeneous wireless networks

Bellavista

Cinque

Cotroneo

2005

Proceedings of the 3rd International Workshop on Middleware for Pervasive and Ad-Hoc Computing - MPAC '05

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The overwhelming success of mobile devices and wireless communications is stressing the need for the development of mobility-aware services. Device mobility requires services adapting their behavior to sudden context changes and being aware of handoffs, which introduce unpredictable delays and intermittent discontinuities. Heterogeneity of wireless technologies (Wi-Fi, Bluetooth, 3G) complicates the situation, since a different treatment of context-awareness and handoffs is required for each solution. This paper presents a middleware architecture designed to ease mobility-aware service development. The architecture hides technology-specific mechanisms and offers a set of facilities for context awareness and handoff management. The architecture prototype works with Bluetooth and Wi-Fi, which today represent two of the most widespread wireless technologies. In addition, the paper discusses motivations and design details in the challenging context of mobile multimedia streaming applications.

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“…This paper addresses these problems by proposing a novel, hybrid approach to handoff management, which requires the MD to be connected to a single AP, while guaranteeing soft handoffs and providing mobility prediction. The novel contribution, namely "Octopus", is a lightweight handoff scheme which extends our previous Last Second Soft Handoff Scheme (LSSH) [2,3]. In particular, even if LSSH provides soft handoffs while reducing unavailability periods (please refer to [2] for a quantitative evaluation), it presents the drawback of long decision periods, which may in turn degrade the accuracy of the location awareness support.…”

Section: Introductionmentioning

confidence: 99%

“…The novel contribution, namely "Octopus", is a lightweight handoff scheme which extends our previous Last Second Soft Handoff Scheme (LSSH) [2,3]. In particular, even if LSSH provides soft handoffs while reducing unavailability periods (please refer to [2] for a quantitative evaluation), it presents the drawback of long decision periods, which may in turn degrade the accuracy of the location awareness support. Moreover, LSSH does not embody mobility prediction schemes.…”

Section: Introductionmentioning

confidence: 99%

Supporting Mobile Ubiquitous Applications with Mobility Prediction and Soft Handoff

Cinque

Russo

2007

Software Technologies for Embedded and Ubiquitous Systems

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The increasing success of mobile-enabled embedded devices is stressing the need for software architectures facing mobility-related issues. This paper proposes a simple yet effective mobility management scheme to ease the development of mobile ubiquitous applications. The scheme seamlessly handles handoff events and provides ubiquitous applications with both location-awareness and mobility prediction support. An implementation prototype has been developed on real-world Bluetooth enabled devices. Experimental results are then obtained from the prototype, showing the effectiveness of the proposed scheme

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Achieving all the time, everywhere access in next-generation mobile networks

Cited by 9 publications

References 18 publications

The Esperanto Broker: a communication platform for nomadic computing systems

The Esperanto Broker: a communication platform for nomadic computing systems

Integrated support for handoff management and context awareness in heterogeneous wireless networks

Supporting Mobile Ubiquitous Applications with Mobility Prediction and Soft Handoff

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