This project addresses the issue of energy-aware information access from mobile clients. A motivating scenario is a sports arena where the users utilize mobile devices such as PDAs and laptops to access game scores, statistics and view instant game replays. Users can utilize local wireless networks provided by the arena as well as wired data ports to access this information. The choice of hardware devices and their characteristics dictate the end user experience. The goal of this project is to explore policy mechanisms for improving the user experience from constrained devices. This implies that:

• Client: The diversity of the clients in terms of their display, network and battery power characteristics precludes the development of a single information dissemination policy. The users want to dynamically change behavior of the system depending on the available resources as well as on how much of the remaining resources to consume.
• Server:The sports arena can hold a large number of users. Each user can utilize any number of different devices to access the information. Hence, the servers need to be reliable and scaleable. Even though the clients appear as a monolothic service to the end user, the reliability requirements steer us towards a cluster of servers that can seamlessly migrate the client requests. Since the clients are constrained by their available network and battery power resources, unnecessary communications with the client to measure the client operating constraints have to be avoided.