Zte ZXG10 OB06, Technical Manual

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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
76 Confidential and Proprietary Information of ZTE CORPORATION
2. Chain networking mode
Figure 67 shows the chain networking mode of the ZXG10 OB06 (V1.0).
Each line denotes a bi-directional E1 connection; however, the actual
related ID DIP switches at the BS side should be designed according to
the relative configurations.
F
I G U R E
6 7 S
C H E M A T I C
D
I A G R A M O F
C
H A I N
N
E T W O R K I N G
SITE0
BSC
SITE1 SITE2
Chain networking is also applicable to the one-site multi-OB06
situation. Since signals go through more links, the line reliability is
relatively poor. This networking mode is applicable to stripe-like areas
with a small population, thus saving a large number of transmission
devices. To prevent the clock performance deterioration, it is
recommended no more than four OB06s be cascaded in the chain
networking mode.
3. Tree networking mode
The tree networking mode of the ZXG10 OB06 (V1.0) is shown in
Figure 68. Each line denotes a bi-directional E1 connection; however,
the actual related ID DIP switches at the BS side should be designed
according to the relative configurations.
F
I G U R E
6 8 S
C H E M A T I C
D
I A G R A M O F
T
R E E
N
E T W O R K I N G
.
.
.
BSC
SITE0
SITE1
SITE2
SITEn
The tree networking mode is applicable to large yet sparsely populated
areas. This mode is complicated, in which signals have to pass many
nodes and the line reliability is relatively low. And the fault from the
upper-level SITE may affect the proper running of the lower-level SITE.
In the tree networking mode, the OB06 connected with BSC is the
central node, which may branch into three nodes, namely OB06 s.
In actual networking projects, due to the decentralized sites, unlike
basic networking modes, the transmission equipment is usually used
for intermediate connection between BSC and OB06. Common
transmission modes include: microwave, optical fibers, HDSL cables