Zte ZXC10 CBTS O1, Technical Manual

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ZXC10 CBTS (V1.0)Technical Manual
26 Confidential and Proprietary Information of ZTE CORPORATION
BDS
BDS is the control center and communication platform of the BTS. In BDS
we see many key CDMA technologies, such as diversity technology, RAKE
reception, softer handoff and power control. .
Located between BSC and RFS, BDS connects the two and it is responsible
for baseband signal modulation / demodulation and encoding / decoding,
and generation / distribution of clocks for the whole BTS.
BDS Schematic Diagram
Fig. 4 shows the working principle of BDS.
F
I G
. 4 B D S S
C H E M A T I C
D
I A G R A M
IP SW
IP
C
H
M
CCM
C
H
M
C
H
M
1 7 8
D
S
M
BDS
BSC
FE TEST PORT
STM-1
16X E1
D
S
M
Media Stream
Signaling Stream
D
S
M
S
D
H
R
I
M
9
GE/FE
IP
C
H
M
SCM
C
H
M
C
H
M
7 8
D
S
M
SBDS
D
S
M
IP
HUB
Media Stream
Signaling Stream
1
R
I
M
9
16X E1
2
As seen from the diagram above, the components of BDS are:
CHM: performs CE processing (spread-spectrum modulation and
despread-spectrum demodulation). The CHM of each BDS is a CE
resource-sharing pool.
RIM: provides interface to connect BDS and RFS, and performs forward
signal summation and backward signal distribution. It also distributes
clocks from GCM to CHM and CCM.