Ericsson MINI-LINK TN R3 ETSI, Technical Description

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MINI-LINK TN R3 ETSI
Table 1 Fault handling on a V-polarization link
Working Standby Hot Standby
Vertical Polarization Horizontal
Polarization
Vertical Polarization Horizontal
Polarization
Tx
side Rx side Tx
side Rx side Tx
side Rx side Tx
side Rx side
Starting
condition f1-V
A
and
f2-V
B
f1-V
A
f1-H
A
and
f2-H
B
f1-H
A
V
A
V
A
H
A
H
A
V
A
Tx
fault
handling
N.A. f2-V
B
,
disruption
accepted
N.A. f1-H
A
or
f2-H
B
,
disruption
accepted
V
B
V
A
or V
B
(quickest
locked-in),
disruption
accepted
No
action H
A
or H
B
(quickest
locked-in),
disruption
accepted
V
A
Tx
fault
handling
N.A.
f2-V
B
,
disruption
accepted
N.A.
f1-H
A
or
f2-H
B
,
disruption
accepted
N.A. V
B
,
disruption
accepted
N.A. H
A
or H
B
,
disruption
accepted
V
A
propaga
-tion fault
handling
N.A. f2-V
B
,
hitless
N.A. f1-H
A
or
f2-H
B
,
hitless
N.A. V
B
, hitless N.A. H
A
or H
B
,
hitless
In case of not-hitless switching traffic disruption of a comparable entity on both
polarizations may happen.
In hot-standby mode when the switching process is initiated the receivers will
lock to the new active TX and the XPIC units will re-converge. The new active
receiver both for H link and V link will be the quicker receiver to lock.
4.7 Transmit Power Control
The radio transmit power can be controlled in Remote Transmit Power Control
(RTPC) or Automatic Transmit Power Control (ATPC) mode, selectable from
the management system including setting of associated parameters. In ATPC
mode the transmit power can be increased rapidly during fading conditions and
allows the transmitter to operate at less than the maximum power during normal
path conditions. The normally low transmit power allows more efficient use of
the available spectrum while the high transmit power can be used as input to
path reliability calculations, such as fading margin and carrier-to-interference
ratio.
The transmitter can be turned on or off from the management system.
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