Mobile context-aware software pose a set of challenging requirements to developers as these applications exhibit novel features, such as handling varied sensing devices and dynamically adapting to the user's context (e.g. his or her location), and evolve quickly according to technological advances. In this paper, we discuss how to handle variability both across different domains and during the evolution of a single application. We present a set of design structures for solving different problems related with mobility (such as location sensing, behaviour adaptation, etc.), together with the design rationale underlying them, and show how these sound micro-architectural constructs impact on variability. Our presentation is illustrated with case studies in different domains.

El aporte de este trabajo es explorar cómo abordar experiencias de co-diseño in-situ de Juegos Móviles basados en posicionamiento en espacios cerrados (por ejemplo, un edificio), describiendo las lecciones aprendidas sobre esta temática. En este trabajo se presenta un framework conceptual para el co-diseño in-situ de Juegos Móviles basados en posicionamiento para espacios cerrados con el objetivo de ayudar a los facilitadores a abordar este tipo de experiencias con recursos útiles (por ejemplo, recursos de Design Thinking). Usando este framework, se presenta una experiencia de co-diseño in-situ de un Juego Móvil basado en posicionamiento en un espacio cerrado; para algunas etapas se utilizó una herramienta de autor que permite co-diseñar in-situ cuáles son los lugares relevantes para una aplicación. A partir de esta experiencia, se extendió la herramienta de autor para poder crear un tipo particular de Juego Móvil basado en posicionamiento. En este trabajo se presenta esta extensión junto con una prueba de conceptos que muestra cómo un juego co-diseñado in-situ con esta extensión fue usado por usuarios finales.

The growth of mobile applications has been exponential in the last couple of years and it has come with technological advances, such as embedded sensors in mobile devices. This brings out greater challenges in the development of context-aware mobile applications, according to the demands of the current market. Currently, there are building approaches for this kind of applications, but these do not have flexibility in the generated applications. Until now, there is not a unified solution for this kind of applications, so, this is an open research area. This paper presents a taxonomy of variability concepts (Relevance, Combination, Precision and Accuracy's Margins, Configuration Type, and Execution Type) to be taken into account when designing building approaches for context-aware mobile application. When these approaches are designed from scratch considering these variability concepts, this allows generating a wide variety of applications. The contribution of our taxonomy is to help the designer to identify the potential variability points in order to obtain more flexible approaches. The aim is to generate a discussion in relation to the variability concepts of the proposed taxonomy, this provides guidelines to be able to achieve variability in this kind of approaches. We hope this will enrich the discussion in relation to this kind of approaches in order to the unification of features that should be handled by these building approaches to obtain variability.

Mobile hypermedia applications combine the well-known advantages of the navigational paradigm of the Web with the capabilities of location-aware software. However, there are some subtleties to integrate them synergistically. In this paper we analyze different aspects related with navigation semantics in mobile hypermedia; in particular we discuss the problems which arise in the use of the familiar backward and forward operations when physical navigation in the real world is involved. Using a motivating example, we present a simple model to handle physical and digital navigation in a cohesive way. We also describe a modular implementation of our ideas in an architecture which support context-aware services.