Wireless networks offer these devices different
levels of mobility support: room-level (personal
area networks), cell-level (fixed wireless), campuslevel
(wireless LANs), country-level (3G/4G
networks), and planet-level (satellites). In some
cases—such as for implanted RFID sensors—
the networks offer “human-level” support, and
NASA is even working on interplanetary-level
mobility. Wireless networks also offer different
per-user bandwidth support, which can vary
from a few kilobits per second (for old satellites
and 1G or 2G networks) to a few megabits per
second (for wireless LANs and PANs and 3G or
4G networks) to several Mbps (for fixed wireless
networks). Figure 1 provides a current snapshot
of mobility support versus bandwidth.
Wireless networks offer these devices differentlevels of mobility support: room-level (personalarea networks), cell-level (fixed wireless), campuslevel(wireless LANs), country-level (3G/4Gnetworks), and planet-level (satellites). In somecases—such as for implanted RFID sensors—the networks offer “human-level” support, andNASA is even working on interplanetary-levelmobility. Wireless networks also offer differentper-user bandwidth support, which can varyfrom a few kilobits per second (for old satellitesand 1G or 2G networks) to a few megabits persecond (for wireless LANs and PANs and 3G or4G networks) to several Mbps (for fixed wirelessnetworks). Figure 1 provides a current snapshotof mobility support versus bandwidth.
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