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| n |
Error
correction:
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– |
1/3
rate forward error correction code (FEC)
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n |
for
SCO only
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– |
2/3
rate forward error correction code FEC
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– |
Automatic
repeat request (ARQ) scheme for data
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n |
data
transmitted in one slot is directly acknowledged by the recipient
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in the
next slot.
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| n |
Authentication and Privacy
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– |
one-way,
two-way, or no authentication possible
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– |
use
stream cipher based on secret keys (0, 40, 64 bits)
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– |
key
management left to higher layer software
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– |
if
stronger protection (longer key is needed), use better encryption
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at
network and/or application level
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