An Assessment of Middleware Platforms for Accessing Remote Services

The open service gateway initiative (OSGi) framework is to provide an open environment for home services, which can be deployed by different service providers. However, currently there is no total solution for the OSGi framework to diagnose and recover from unexpected faults, especially those generated by resource conflicts between services, which would require user intervention. This paper summarizes the requirements for diagnosis in the open service platform and proposes an integrated approach to detect service conflict faults, handle general exceptions, and diagnose service errors on OSGi platforms. By providing user friendly diagnosis messages, and suggestions to fix exceptions, users can operate home gateways without a heavy learning burden, and service providers can reduce the overhead associated with user requests for technical support. The implementation is packaged as a service bundle running on the service layer of the OSGi platform. This is the first attempt to diagnose and handle the service conflicts on the OSGi platform during runtime.

Presents a paradigm that combines the speed of single address spaces with the traditional protection mechanisms found in multiple address space systems such as UNIX. Multiple address spaces are common today for providing safety and security in operating systems. A process in one address space cannot corrupt or compromise memory locations an another process's address space. However, inter-process communication is slow because it is expensive to context switch between address spaces. Single address space systems provide a solution to the problem of slow context switches. In a single address space system, which is typically implemented in a 64-bit address space, all processes shape a common address space. Hence, the need to move between address spaces during inter-process communication is avoided. It is our position that it is not strictly necessary to use a single address space in order to achieve fast inter-process communication. >

현재 여러 종류의 홈 네트워크(home network) 기술들이 존재하고 있으며, 단일화된 홈 컴퓨팅(home computing) 환경을 위해서는 서로 다른 네트워크 프로토콜간의 연동이 필수적이다. 이를 위하여 여러 종류의 홈 네트워크 미들웨어(home network middleware)가 개발되었고 특히 OSGi (Open Service Gateway Initiative)는 다양한 미들웨어 환경 사이의 서비스 상호연동을 제공하기 위해 제안되었다. 그러나 OSGi의 실행환경인 프레임워크(framework)는 수동적으로 서비스 번들(service bundle), 사용자 및 장치 관리 등을 수행하는 취약점을 가지고 있다. 본 논문에서는 사용자들의 편의성을 위해 수동적으로 관리되는 부분들의 문제점을 개선하고자 한다. 이를 위하여 자동화 서비스와 효율적인 서비스 번들의 관리를 위한 SBM (Service Bundle Manager)의 구조를 제안하고, SBM을 구현하여 SBM의 실효성을 검증하였다. Since different kinds of home network technologies coexist, seamless connections between different kinds of network protocols are essential for home computing environments. Several kinds of home network middleware have been developed and OSGi(Open Service Gateway Initiative) was initiated mainly for interoperability support with service distribution between various middleware environments. Framework, OSGi service platform, has weaknesses of passive service bundle management, user management and device management. Therefore, this paper resolves passive management parts which are critical weaknesses of OSGi Specification Version 3 and proposes SBM (Service Bundle Manager) to effiently manage various service bundles. Additionally, we verify practical effects of SBM through experiments.

This paper discusses the benefits of a proposed Session Initiation Protocol (SIP)-based device communication Service for deployment on a Mobile Open Services Gateway Initiative (OSGi) framework. Mobile OSGi deployment provides a gateway to a mobile user’s Personal Area Network (PAN). When the SIP Service is deployed in OSGi, it is possible to bridge multiple devices and gateways, offering device and service mobility as users traverse multiple mobile and home networks. Additionally, the SIP Service provides protocol bridging via bridging bundles and grants application layer mobility to OSGi services. In this paper, we discuss a novel architecture, based on the deployment of the SIP Service in a mobile OSGi framework, which effectively delivers PAN and home network device interoperability. Finally, we offer a use case scenario and analysis of its implementation using our proposed architecture.

It is a key problem for a 7*24 running system to update and maintain online. According to the feature of OSGi (Open Service Gateway Initiative) framework, current service dynamic update policies for OSGi framework are analyzed. In order to solve the problem of service mutual consistency and service state consistency during service update, the service dynamic update policy based on publish & subscribe model is presented. This policy is based on quiescent state theory to ensure mutual consistency when services are updated online. The process of the dynamic service update policy is described by Petri net. We realize the policy using Event Admin Service in the experiment with well-defined program model. The result shows that the policy is validate and feasibility.

The Open Services Gateway Initiative (OSGi) attempts to meet the ubiquitous computing environment by providing a managed, extensible framework to connect various devices in a local network such as in a home, office, or automobile. By defining a standard execution environment and service interface, the OSGi promotes the dynamic discovery and collaboration of devices and services from different sources. The OSGi offers a unique opportunity for ubiquitous computing as a potential framework for achieving interoperability between various sensors, home appliances, and networked devices. The OSGi framework supports a remote installation of a bundle, which is a unit that installs and deploys services. However, in order for the service in execution to move, a specific form of bundle such a mobile service manager is needed, one which is able to move through a heterogeneous network.This paper proposes a method that can manage bundles for supporting dynamic service’s mobility between frameworks, in order to ensure the mobility of services in a multiple the OSGi framework environment. For our purposes, we have designed the mobile service management system for managing the lifecycle of the bundle and for the mobility of services in the OSGi framework. The mobile service management system we are proposing implements a bundle form which can perform in an OSGi framework as well as manage the mobile services. As a result, mobility in a ubiquitous computing environment will be supported more efficiently.

Energy-saving is a very important issue in resent years. To provide a management platform of energy-saving in the digital home can save more power when using the home appliances. In this paper, we design a management platform for energy-saving based on open service gateway initiative (OSGi), remote management server (RMS) and home automatic network (HAN) technologies. Simulation results show that the proposed system is a better solution for home energy-saving.

Practical design and implementation of recognition assisted dynamic surveillance system

Ubiquitous computing as the integration of sensors, smart devices, and intelligent technologies to form a “smart space” environment relies on the development of both middleware and networking technologies. Several kinds of smart space middleware have been developed and OSGi (Open Service Gateway Initiative) was initiated mainly for interoperability support with service distribution among various middleware environments. In this paper, we analyze the weaknesses in the OSGi service platform such as a non-distributed framework, passive user management, device management, and service bundle management. Moreover, we propose that in a smart space environment, Location-aware SBM (Service Bundle Manager) is most capable of efficiently managing various service bundles. This paper concludes with the implementation results for the SBM.

Since different kinds of home network technologies coexist, seamless connections between different kinds of network protocols are essential for home computing environments. Several kinds of home network middleware have been developed and OSGi (Open Service Gateway Initiative) was initiated mainly for interoperability support with service distribution between various middleware environments. In this paper, we analyze the weaknesses in the OSGi service platform, such as a non-distributed framework, passive user management, device management, and service bundle management. Moreover, we propose SBM (Service Bundle Manager) to efficiently manage various service bundles. This paper concludes with the implementation results for SBM.

With the rapid development of mobile devices and Internet services, managing home security with these devices and services is gaining popularity. To expand the range of usability of conventional home surveillance cameras, we propose the UPnP-based Surveillance Camera System (USCS), which employs UPnP technology to search, control, and manage IP-based cameras. With UPnP, interconnected equipment and the control network inside the home can be accessed for data sharing, communication, and entertainment. However, the current UPnP was originally designed for local networks. Therefore, we integrated the UPnP control module into the Open Service Gateway Initiative (OSGi) framework to access UPnP services from a remote network. The control point is an external network that can access the UPnP device, which is hosted in a home area network via USCS. Our system showed improved searching, management, discovery, and manipulation of IP-based cameras in a home network using our system, compared to a conventional system. Users can use a mobile device to monitor the home security status in real time by a remote access function provided by OSGi. Hence, users can monitor their homes more efficiently and instantly, ensuring the safety of house members and the property.

This paper presents the first attempt to design an interoperability platform by integrating an RDF based information sharing infrastructure named Smart-M3 within the OSGi framework, enhancing the information level interoperability of the former with the service level interoperability of the latter. Such an interoperability platform provides a generic and simple solution to develop Smart Environment Applications.

Context-aware personalization services for a residential gateway based on the OSGi platform

OSGi (Open Service Gateway Initiative) is now emerging as a promising software environment for remote healthcare systems. OSGi allows dynamic program loading and incremental update resulting in a very flexible system which is essential for remote healthcare system where constant program updating is needed. This flexibility however requires a very sensitive security solution instead since remote malware can also be injected through the same mechanism. This paper proposes a technique to check the security of external bundle, the program loaded dynamically. The paper shows the details of the technique and proves its validity.

Remote Health Interventions: Effectiveness, Cost, and Cost-Effectiveness Considerations.