Thomas Kunz
Systems and Computer Engineering
47
Challenges
nWireless Technology
–Higher
bandwidth
–Cheaper
radios (Bluetooth, ZigBee)
–Operate in
licence-free spectrum, or co-exist with other services/exploit unused portions of frequency band
nServices
–Networks
are more than dump bitpipes (3G was initially big on services, difference between “beyond 3G” and 4G)
nInternet Protocols
–Existing
protocols ill-suited to wireless transmissions and mobile end-hosts
–New
protocol requirements (mobility mgmt, different types of handoff, QoS, security)
–Yet another
“nail in the coffin” for IPv4 (3 billion handsets!)