 |
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| – |
packet
losses over wireless link often in bursts
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n |
will
trigger slow start rather than fast retransmit
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| – |
packet
loss no indication of congestion
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n |
reduction
of congestion window will reduce throughput
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n |
getting
back to previous window size may take long
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| – |
problem
caused by mismatch of wireless link properties with
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assumptions
underlying TCP design
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| – |
multiple
suggestions to improve TCP performance:
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n |
link-level
retransmissions: improve reliability of wireless link
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n |
network
layer solutions: SNOOP
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n |
transport
layer solutions: I-TCP (indirect TCP), Mowgli
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n |
session
layer solutions: establish end-to-end session layer connection,
|
|
manages
two separate TCP connections
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|
