ZTE Corporation ZXG-BTS2 Manuale Utente
ZXG10-BTS (V2.9) Technical Manual
40
Confidential and Proprietary Information of ZTE CORPORATION
F
I G U R E
1 8
S
C H E M A T I C
D
I A G R A M O F
5 1 - F
R A M E
C
H A N N E L
S
T R U C T U R E
S
F
B
C
R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R
51 Frame
S
F
C
C
S
F
C
C
S
F
C
C
I
R R R R R R R R R R
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
S
F
C
C
R R R R R R R R R R
I
I
I
D0
D1
D2
D3
D4
D5
D6
D7
A4
A5
A6
A7
I
I
I
A1
A2
A3
I
I
I
A5
A6
A7
I
I
I
D0
D1
D2
D3
D4
D5
D6
D7
A0
D0
D1
D2
D3
D4
D5
D6
D7
A4
S
F
B
C
S
F
C
C
S
F
D0
D1
S
F
D2
D3
I
S
F
A0
A1
S
F
B
C
S
F
C
C
S
F
D0
D1
S
F
D2
D3
I
S
F
A2
A3
D3
D3
R R
R R
A2
A3
A0
A1
D2
D2
S
F
S
F
D0
D1
D0
D1
R R R R R R R R R R R R R R R R R R R R R R R
R R R R R R R R R R R R R R R R R R R R R R R
F:FCCH S:SCH
B:BCCH C:CCCH（CCCH=PCH+AGCH+RACH）
R:RACH D:SDCCH
A:SACCH/C
I:idle
BCCH+CCCH
(Downlink)
BCCH+CCCH
(Uplink)
8 SDCCH/8
(Downlink)
8 SDCCH/8
(Uplink)
BCCH+CCCH
+4SDCCH/4
(Downlink)
BCCH+CCCH
+4SDCCH/4
(Uplink)
(a) FCCH+SCH+BCCH+CCCH
(b) SDCCH/8(0,...,7)+SACCH/C8(0,...,7)
(c) FCCH+SCH+CCCH+SDCCH/4(0,...,3)+SACCH/C4(0,...,3)
For the half-rate voice channel combination, each timeslot has two
half-rate sub-channels and corresponding SACCH, with 26TDMA
half-rate sub-channels and corresponding SACCH, with 26TDMA
frames as the multi-frame. The frame structure is shown in Figure
19.
19.
F
I G U R E
1 9
S
T R U C T U R E O F T H E
H
A L F
- R
A T E
V
O I C E
C
H A N N E L
H
0
H
0
S
1
S
0
H
1
H
0
H
0
H
0
H
0
H
0
H
0
H
0
H
0
H
0
H
0
H
1
H
1
H
1
H
1
H
1
H
1
H
1
H
1
H
1
H
1
H
1
26 Frames
4. Channel arrangement in the cell
Given below are several examples of channel combination in a cell (in
the brackets are sub-channels).
i. Channel combination in a small-capacity cell with only one TRX
the brackets are sub-channels).
i. Channel combination in a small-capacity cell with only one TRX
TN0: FCCH + SCH + BCCH + CCCH + SDCCH/4 (0, …, 3) +
SACCH/C4 (0, …, 3)
TN1 ~ 7: TCH/F + FACCH/F + SACCH/TF
TN1 ~ 7: TCH/F + FACCH/F + SACCH/TF
ii. Channel combination in a medium-capacity cell with four TRXs
One TN0 group: FCCH + SCH + BCCH + CCCH
Two SDCCH/8 (0, …, 7) + SACCH/C8 (0, …, 7)
29 TCH/F + FACCH/F + SACCH/TF
Two SDCCH/8 (0, …, 7) + SACCH/C8 (0, …, 7)
29 TCH/F + FACCH/F + SACCH/TF
iii. Channel combination in a large-capacity cell with 12 TRXs