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| 2. Our Approach to ucode Standards |
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No rigid rules will
be imposed regarding the frequencies to be used.
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In Japan, standardized readers
and writers are multiband devices that support frequencies of
13.56 MHz or 2.45 GHz (950 MHz).
Developers in other countries can determine frequencies in line
with their national standards. |
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Tags are multiband devices that
also support different frequencies.
Passive tags in particular will be, in principle, constructed
with resonant circuits, so they will naturally support multiband
use. |
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The essential technical issues extend beyond
the matter of frequency.
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- Indeed, the output level of
electromagnetic waves has a great impact on the distance
of use. |
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- Some uncertainty remains about
the advisability of high-level emission in consideration of
health issues, among others. |
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The air interface protocol
is basically a matter for individual development.
The ISO 18000 air interface protocol cannot be used without
modification for applications handled by the uID Center because
it was not designed for entire product lifecycles in ubiquitous
systems after smart tags become pervasive. |
| 3. Our Approach to Distinguishing
ucode Classes |
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We assume there will be no single
type of versatile "super chip" that can be used in
any application.
Some applications will emphasize low-cost performance while
other applications will emphasize security even at greater expense.
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There are parameters for a variety
of required specifications.
Here are just a few parameters: cost, security functions, transmission
distance, carrier material, presence of a rewritable data area,
and operation (active or not) when out of range of readers or
writers. |
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Devices are classified into several groups
for standardization.
Classification will be primarily based on security attributes.
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