Why Cell Phones Will Dominate the Future Internet S. Keshav Canada Research Chair in Tetherless Computing School of Computer Science, University of Waterloo 200 University Ave. W, Waterloo, ON, Canada N2L 3G1 keshav@cs.uwaterloo.ca Categories and Subject Descriptors C,2,1 [Network Communications Architecture and Design]: Network 2. OVERVIEW A cell phone is essentially a battery-powered microprocessor with one or more wireless transmitters and receivers optimized for voice I/O. Even a bare-bones model provides a keyboard, an LCD screen, and a general-purpose computing platform, typically supporting Java2 Mobile Edition (J2ME) or .NET Compact APIs. More sophisticated models provide a camera, 1MB-5GB of local storage, a full-color screen, multiple wireless interfaces, and even a QWERTY keypad. Importantly, a cell phone cannot be used without a globally unique, per-user, hard-to-forge identifier, called the International Mobile Subscriber Identifier or IMSI1. IMSIs are allocated by cell phone providers and allow them to track and bill for usage. A cell phone provider maintains a comprehensive database, called the Home Location Register (HLR), that keeps track of the current location of each IMSI, its usage, and associated subscriber information, such as a credit card number, or prepaid usage authorization. HLRs make it possible for cell phone providers
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Why cell phones will dominate the future internet
Keshav, S.
Follow ACM SIGCOMM Computer Communication Review
, Volume 35 (2)
Association for Computing Machinery – Apr 1, 2005
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