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Data Dissemination in Wireless Computing Environments (Hardcover, 2000 ed.)
Loot Price: R4,297
Discovery Miles 42 970
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Data Dissemination in Wireless Computing Environments (Hardcover, 2000 ed.)
Series: Advances in Database Systems, 19
Expected to ship within 12 - 17 working days
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In our increasingly mobile world the ability to access information
on demand at any time and place can satisfy people's information
needs as well as confer on them a competitive advantage. The
emergence of battery-operated, low-cost and portable computers such
as palmtops and PDAs, coupled with the availability and
exploitation of wireless networks, have made possible the potential
for ubiquitous computing. Through the wireless networks, portable
equipments will become an integrated part of existing distributed
computing environments, and mobile users can have access to data
stored at information servers located at the static portion of the
network even while they are on the move. Traditionally, information
is retrieved following a request-response model. However, this
model is no longer adequate in a wireless computing environment.
First, the wireless channel is unreliable and the bandwidth is low
compared to the wired counterpart. Second, the environment is
essentially asymmetric with a large number of mobile users
accessing a small number of servers. Third, battery-operated
portable devices can typically operate only for a short time
because of the short battery lifespan. Thus, clients are expected
to be disconnected most of the time. To overcome these limitations,
there has been a proliferation of research efforts on designing
data delivery mechanisms to support wireless computing more
effectively. Data Dissemination in Wireless Computing Environments
focuses on such mechanisms. The purpose is to provide a thorough
and comprehensive review of recent advances on energy-efficient
data delivery protocols, efficient wireless channel bandwidth
utilization, reliable broadcasting and cache invalidation
strategies for clients with long disconnection time. Besides
surveying existing methods, this book also compares and evaluates
some of the more promising schemes.
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