The role of trace modulation in building mobile computing systems (1997)
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| Venue: | In Proceedings of the Sixth IEEE Workshop on Hot Topics in Operating Systems |
| Citations: | 9 - 1 self |
BibTeX
@INPROCEEDINGS{Satyanarayanan97therole,
author = {Ni. Satyanarayanan and Brian Noble},
title = {The role of trace modulation in building mobile computing systems},
booktitle = {In Proceedings of the Sixth IEEE Workshop on Hot Topics in Operating Systems},
year = {1997}
}
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Abstract
In this paper we put forth the view that trace modulation is an indispensable technique for building and evaluating mobile computing systems. The essence of our solution is transparent, real-time, trace-driven emulation of a target network. Although conceptually simple, trace modulation strikes an attractive balance between the conflicting demands of realism, ease-of- use, and reproducibility. It provides three important benefits. First, it allows control of the complexity of the network environment to which mobile software is exposed. Second, it enables mobile clients to be subjected to reproducible yet realistic network per$ormunce. Third, it allows easy exploration of a mobile system in the context of hypothetical mobility patterns and network infrastructures. These benefits suggest that trace modulation will play a central role in the development offuture mobile computing systems. 1. Position Trace modulation, a new technique for network emulation, solves many difficult evaluation and debugging problems induced by mobility. By using a trace of network characteristics to drive the emulation, trace modulation strikes an attractive balance between the conflicting demands of realism, ease-of-use, and reproducibility. Consequently, we are convinced that this simple yet potent and versatile technique will play a central role in the development of future mobile computing systems. 2. Problem statement The network quality experienced by a mobile host can vary dramatically and unpredictably over space and time [6, 121. This imposes fundamental constraints on the logistics of system development, and on the degree of experimental control for evaluation. On the one hand, the difficulty of accurately re-creating a mobile networking
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