Disconnected Operation Service in Mobile Grid Computing

Abstract

In this paper, we discuss on the extension of grid computing systems in mobile computing environments, where mobile devices can be effectively incorporated into the grid either as service recipients or as more valuable service providers. First, based on the present grid architecture, we try to figure out what would be the newly required services in such a mobile/grid integrated architecture. There are a number of challenging issues when taking mobile environment into account, such as intermittent connectivity, device heterogeneity, and weak security. Among these issues to solve, we particularly focus on a disconnected operation problem in this paper since mobile resources are prone to frequent disconnections due to their confined communication range and device mobility. We develop a new job scheduling algorithm for mobile grid system and evaluate it by various methods such as mathematical analysis, simulation, and prototype implementation.

Optimizing Operation of a Hierarchical Campus-wide Mobile Grid for Intermittent Wireless Connectivity

“…In this case, mobile devices are considered to have limited computational and/or storage capabilities [4], [7], [9], [10]. Of course this is true for mobile devices in general and actually this is the main reason for which the supporters of this first approach propose the integration of mobile devices to the grid.…”

“…Submitting jobs and receiving the results back is not as straightforward as it may seem, since power constraints and frequent disconnections are prevalent in wireless and mobile communications. The use of proxies is proposed in [4] which act as gateways to the grid. These proxies undertake the role of the mediator between the mobile device and the grid system, and try to hide the instability of the wireless/mobile environment by being responsible for submitting the job, monitoring its execution and returning back the results i.e.…”

“…In the case of creating mobile grids on-site [3], [4], [5], [6], mobile devices residing in a well defined area such as a cell in cellular networks or a WLAN hot-spot (Service Area, SA) are coordinated by a central entity (residing at the Access Point/Base Station, BS) in order to perform a task (computation grid). In this approach, the devices provide the description of their capabilities and the degree of their availability to the BS.…”

“…In effect, it is considered natural to extend the idea of resource sharing to mobile and wireless communication environments. However, there are various, quite different approaches on the exact character of this extension [2], [3], [4], [5], [6], [7], [8], [9], [10], [11]. Their differences mostly rely on whether mobile devices are considered powerful enough to provide their resources or not.…”

Escalonamento em grades móveis: uma abordagem ciente do consumo de energia

“…São necessárias, portanto, medidas que garantam acesso transparente e confiável aos recursos disponibilizados. Uma possível solução para tal problema é a utilização de uma arquitetura baseada em proxies como a proposta por Park et al (2003). Nessa arquitetura, os proxies são elementos mediadores, sendo responsáveis pela submissão, monitoramento e retorno das requisições realizadas pelos dispositivos móveis.…”