October 2018
Intermediate to advanced
962 pages
40h 41m
English
Content preview from Industrial Communication Systems
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3-1
3.1 Introduction
e technical details of media access are generally implemented in OSI layer 1 and 2. Usually the nature
of
OSI
layer
1
determines
the
operation
conditions
and
feasible
access
mechanisms
that
can
be
imple-
mented
in lay
er
2.
Me
dia
access
on
full-duplex
media
is
oen
a
simple
task
because
each
station
can
send
data
indepen-
dently
of
each
other.
On
the
other
hand,
media
access
on
half-duplex
media
is
typically
nontrivial
and
requires
sol
utions
for the fol
lowing
iss
ues:
•
Access
arb
itration
•
Collision
tre
atment
•
Access
fai
rness
•
Access
pri
orities
for sel
ected
sta
tions
or mes
sages
•
Quality
of ser
vice
(Qo
S)
req
uirements
(qu
euing ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.