Network protocols for mobile networks
IPv6
o Activity started in 1994, 16 years after introduction of IPv4 in 1978
o Initial motivation: 32-bit address space completely allocated
200 million addresses out of theoretical maximum of 4.29 billion
NAT is used to overcome shortage
o Additional motivation
Autoconfiguration avoids need for manual configuration or DHCP
Header changes for faster forwarding, and facilitates QoS
Anycast address: routes to best of several servers
o 40-byte header, but extensible using datagram payload
No fragmentation allowed
Priority identifies priority among datagrams in flow
Flow label identifies datagram of the same flow
Next header identifies upper layer data protocol
o Changes from IPv4
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