By Tomasz Imielinski, Henry F. Korth (auth.), Tomasz Imielinski, Henry F. Korth (eds.)
The swift improvement of instant electronic conversation expertise has cre ated features that software program platforms are just commencing to make the most. The falling fee of either communique and of cellular computing units (laptop pcs, handheld pcs, and so forth. ) is making instant computing cheap not just to company clients but additionally to shoppers. cellular computing isn't a "scaled-down" model of the validated and we- studied box of allotted computing. the character of instant communique media and the mobility of pcs mix to create essentially new difficulties in networking, working platforms, and knowledge structures. additional extra, a few of the purposes estimated for cellular computing position novel calls for on software program structures. even if cellular computing remains to be in its infancy, a few easy thoughts were pointed out and a number of other seminal experimental structures built. This e-book contains a set of contributed papers that describe those suggestions and sys tems. different papers describe functions which are presently being deployed and verified. the 1st bankruptcy deals an advent to the sphere of cellular computing, a survey of technical matters, and a precis of the papers that contain sub sequent chapters. we've got selected to reprint numerous key papers that seemed formerly in convention complaints. a few of the papers during this booklet are be ing released right here for the 1st time. of those new papers, a few are increased models of papers first offered on the NSF-sponsored Mobidata Workshop on cellular and instant info platforms, held at Rutgers collage on Oct 31 and Nov 1, 1994.
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Performance Metrics Information content and methods of the information delivery depend on the location of the user. Hence, user location is an important and dynamically changing parameter. Cost of information will vary depending on the location of the user, who may now face the choice of getting desired the information now, but for higher cost, or later, for less cost. Finally, an additional precious resource, battery power, has to be minimized when interacting with the fixed network. We speculate that in the client's interactions with information services (such as the World-Wide Web), measures such as queries per Hz and queries per watt will be important.
In order to avoid expensive page transfers, an alternative solution is proposed in which pages are generated locally by the mobile client. Thus, the mobile client, upon requesting a particular Web page, receives the HTML code which it runs to locally generate the page. 3 Power Management Power management is already being addressed in hardware. Features like switching off backlighting, providing the CPU with a power-efficient doze mode, replacing disks with more energy-efficient semiconductor memories, are just a few examples of steps towards lowering power consumption.
Vishwanathan introduces the concept oi publishing into client-server interactions in wireless environments. Publishing is a periodic broadcasting of information by the MSS over a wireless medium. Publishing mode is intended for information which is likely to be requested frequently and its advantages include reduction in uplink traffic, as well as power savings on the client platform. Chapter 11 provides an overview of different addressing methods for publishing mode, which are based either on temporal or on multicast addressing.