Zte ZXC10 CBTS O1, Техническое руководство

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Chapter 4 - BTS Networking and Configuration
Confidential and Proprietary Information of ZTE CORPORATION 51
LEB Mode
The LEB mode is basically a BDS + RFS extension approach to deliver pure
DO or 1X + DO service.
Two BTS cabinets are combined in this mode with the additional cabinet
configured with both baseband and RF resource. This mode allows no
sharing of baseband, that is, both master BTS and slave BTS have their
own baseband and RF resource. However, both cabinets share the CCM
and Abis interface.
This mode provides a capacity of 24 carrier sectors to deliver pure DO
service, or 4-carrier 3-sector for 1X + DO.
There are two extension approaches for this mode: carrier extension
(more than 4 carriers) and sector extension (more than 3 sectors). The
two extension modes differ in the RFE board and the cable that connects
two cabinets. Fig. 17 shows the board layout in LEA mode.
F
I G
. 1 7 L E B M
O D E
C
H
M
1
C
H
M
1
T
R
X
T
R
X
T
R
X
R
M
M
2
R
I
M
1
RPD
S
A
M
0
C
C
M
C
C
M
D
S
M
G
C
M
L
P
A
P
I
M
0
L
P
A
L
P
A
S
N
M
B
T
M
T
R
X T
R
X
T
R
X
R
M
M
2
RPD
S
A
M
1
L
P
A
P
I
M
0
L
P
A
L
P
A
C
H
M
1
C
H
M
1
RFE
5
RFE
5
RFE
5
RFE
5
RFE
5
RFE
5
RF combined cabnet alternate cable
RF combined cabnet alternate cable
RF combined cabnet alternate cable
B
I
M
B
I
M
C
H
M
1
C
H
M
1
R
I
M
1
S
C
M
S
C
M
C
H
M
1
C
H
M
1
BASE cascade cable