A Context-Aware Hoarding Mechanism for Location-Dependent Information Systems

When used in an outdoor environment mobile information systems often su er from the disadvantages of wireless WANs, especially low bandwidth, high delay, and frequent disconnections. Hoarding is an e ective method to overcome these disadvantages by transferring information which is probably needed by the user in advance. In this paper we propose a generic, context-aware hoarding mechanism. When selecting the information to hoard, it considers the user's future location as well as the expected speed of movement. In contrast to existing hoarding mechanisms it is universally applicable for di erent types of location-dependent, mobile information systems. Its exibility allows it to rely on di erent knowledge sources in order to get information about a user's context.