Goals in Wearable Computing Jan Beutel, Michael Eisenring, Marco Platzner, Christian Plessl, Lothar Thiele Computer Engineering and Networks Lab Swiss Federal Institute of Technology (ETH) Zurich November 16, 2001 Computer Engineering and Networks Laboratory

2 ETH Zurich November 16, 2001 Project Goals: Reconfigurable Global Goal: –Investigate Reconfigurable CPUs in the context of the wearable and multimedia application domain –Potential of Reconfigurable CPUs: High performance, low power, flexibility, dynamically adaptable to tasks –Wearable context: Reconfigurable systems as one alternative implementation architecture Concrete Goals for Zippy Project: –Design of reconfigurable array, design space exploration –Generic model for describing RC arrays –Behavioral system model (performance, power, area) –Evaluation of Zippy CPU –Compilation issues

3 ETH Zurich November 16, 2001 Wearable System WLAN Comm Model Comm Config

4 ETH Zurich November 16, 2001 Related Work : Reconfigurable GARP (UC Berkeley) –Coprocessor, fine grained logic –Project targets whole system, also compiler technology –Status: simulation Morphosys (UCLA) –Multimedia Applications, streaming, SIMD –Status: VLSI implementation, TinyRISC and reconfigurable logic Remarc (Stanford ) –Reconfigurable multi processor architecture, multimedia –Status: simulation OneChip (Univ. of Toronto) –Work on integration of Array and CPU –Status: simulation framework for behavioral simulation DPC (NCSU) –Dynamic programmable cache, integration of logic elements into cache –Status: simulation of DPC

5 ETH Zurich November 16, 2001 Collaboration in Polyproject Results that can be used in the Polyproject: –Simulator for reconfigurable CPU, considering performance, power and area –Prototype for alternative implementation of wearable components –Definition of a wearable benchmark –HW/SW co-simulation know-how Expectations from other groups: –For optimal design of CPU we need a set of wearable algorithms –For evaluation of CPU we will need a concrete algorithm, that is used by other group for evaluation of performance

6 ETH Zurich November 16, 2001 Project Goals: Communication Generic scalable communication interface –With a model description –Can be configured by applications to meet energy/cost specs –Can be operated and adapted on demand Embedding a distributed positioning service –On demand availability with different resolution Goals for next 12 months –API for the communication interface, positioning service –Prototype network with at least 5-10 nodes per person Goals for next 24 months –Extension to other protocols/media –Detailed tradeoff analysis in real world scenario

7 ETH Zurich November 16, 2001 Communication Model Model State Interface ?? Context/controller Communication IF Model State HW Resource Model State HW Resource ?? User Input Other Resources

8 ETH Zurich November 16, 2001 Related Work : Communication Standardized protocols and driver software like WLANs, Bluetooth, GSM, UMTS, pager, tags… ETHZ – Smart Its (Mattern, Schiele) EPFL/ETHZ – Terminodes (Vetterli et al) UCB/CITRIS – BWRC (Rabaey, Brodersen) UCB/CITRIS – Smart Dust, TinyOS (Culler, Pister) ORL – Active Bat’s (Hopper) UCLA – GALORE (Estrin) TU Berlin – Analysis of Wavelan utilization (Wolisz) Chris Savarese, Jan Beutel, and Rabaey Jan M. Locationing in distributed ad-hoc sensor networks. In Proceedings of ICASSP, 2001

9 ETH Zurich November 16, 2001 Collaboration in Polyproject What we need from other groups –Communication requirements for all components –How components are to be organized/managed –Prototype hard/software environment (WearArm, Sensors, Peripherals) and specifications Collaboration with other projects within the Polyproject –Definition of a sample scenario and the application interfaces with sensor and context groups –Embedding communication hardware into the demonstrator Usable results –Contribution to the context model/discussion –Network based positioning –Working network interfaces and networking model