Perceptual network metaphors: Breaking the network transparency paradigm

Abstract

The design and development of networked applications is based on the principle of network transparency. This premise results in the isolation of the users from the network state, independently if such is achieved at the network, transport or the above layers of the system. In the case of a Real-Time Interactive Application (RTIA), such as an online game or a Virtual Environment, the requirements regarding end-to-end Quality of Service (QoS) cannot be guaranteed, potentially disrupting the user's enjoyment. The nature of a RTIA reveals the shortcomings of current system design and the existing QoS mechanisms. This paper argues that the end point of the end-to-end argument is ultimately the user, rather than ending at the application as portrayed by the traditional view. With the Perceptual Network Metaphor (PNM) framework the user is implicitly shown the network state via feedback metaphors that are seamless within the context of the application. © Springer-Verlag Berlin Heidelberg 2003.