Industrial Communication Systems

39-6 Industrial Communication Systems

managing nodes (RMNs) need to be available in the network. In this direction, two new entities have

been

dened.

e

active

managing

node

(AMN)

is

one

(and

the

unique)

of

the

RMNs

that

currently

hosts

and

executes

the

functionality

of

the

MN.

e

stand-by

managing

node

(SMN)

is

one

of

the

RMNs

that

is

in

stand-by

state

regarding

MN

functionality.

From

the

network

point

of

view,

a

SMN

behaves

like

a

CN,

with

the

dierence

that

the

SMN

is

constantly

monitoring

the

network

and

hosting

also

the

current

status

of

all

participants.

In

case

of

any

failure

of

the

AMN,

one

of

the

RMNs

will

immediately

takeover

the ...