A coordination framework for dynamic adaptation in ubiquitous systems based on distributed tuple space

Abstract

The evolution of mobile technologies allows the emerging of ubiquitous systems, able to anticipate user needs and to seamlessly adapt to context changes. These systems present the problem of dynamic adaptation in a highly distributed, heterogeneous and volatile environment, since it may be difficult to collect and process context information from distributed unknown sources. In order to facilitate the development of such systems, this paper extends an existing coordination framework based on tuple spaces, aiming at the management of distributed information. Hence, a decentralized coordination framework was created, offering primitives to developers to create ubiquitous systems able to interact and cooperate in scenarios of total decentralization. This paper reports some experimental results obtained in a testbed of smartphones and tablets which demonstrate the practical feasibility of our approach and pointed out how our solution can grant context data dissemination in ad hoc and infrastructured networks.

System Support for Self-Adaptive Cyber-Physical Systems

“…An example of a self-adaptive mobile user guide is derived from a Software Product Line (SPL) called Mobiline 1 , created in our research group during the UbiStructure project 2 . SPL is a reuse-based software development approach to create software based on reusable artifacts, by modeling an application domain, and then describing mandatory and optional characteristics of every application derived from that domain.…”

“…At this point, a request is sent to the network using USABle. CACs running on nearby devices respond (3) to requests when a nearby user CIB is written on their local tuple space using the "put" operation (2). The device who initiated the request receives the information about nearby devices (4).…”

“…Work of a master student co-advised by myself2 Available in http://code.google.com/p/syssu/ 3 http://www.ieee802.org/1/pages/MIBS.html…”