Thomas Kunz
Systems and Computer Engineering
20
Snoop: Network Layer Solution
nidea:
modify network layer software at base station
nchanges
are transparent to MH and FH
–no
changes in TCP semantics (unlike I-TCP)
–less
software overhead (packets pass TCP layer only twice)
–no
application relinking on mobile host
nmodifications
are mostly in caching packets and performing
local retransmissions across the wireless link by monitoring (snooping) on TCP acks
nresults
are impressive:
–speedups
of up to 20 times over regular TCP
–more
robustness when dealing with multiple packet losses