ZTE Corporation ZXG-BTS2 Manual De Usuario
Chapter 4 - System Functions
Confidential and Proprietary Information of ZTE CORPORATION 63
The DATA REQ message contains the complete acknowledgment mode L3
transparent message. At the time when the BTS sends the I frame, the
BTS starts timer T200 and records the I frame resend times N200. When
BTS starts timer T200 and records the I frame resend times N200. When
T200 expires for N200 times or the REJ frame is received, the BTS sends
the ERROR IND message to the BSC.
the ERROR IND message to the BSC.
The receiving is shown in Figure 39.
F
I G U R E
3 9
R
E C E I V I N G A
T
R A N S P A R E N T
L 3 M
E S S A G E I N T H E
A
C K N O W L E D G M E N T
M
O D E
MS
LAPDm
FURRM
HPIMan
LAPD
BSC
OAMM
Dm_DL_DATA
_IND
DL_DATA_REQ (DATA IND)
(DATA IND)
(I frames)
(RR frames)
The BSC transfers to the BSC with the acknowledgment mode L3
transparent message that is received from MS. The DATA IND message
contains the complete acknowledgment mode L3 transparent message.
contains the complete acknowledgment mode L3 transparent message.
Transmission and Receiving of Transparent L3 Message
in Non-Acknowledgment Mode
in Non-Acknowledgment Mode
The procedure of transmitting a L3 transparent message from the BSC is
shown in Figure 40.
F
I G U R E
4 0
T
R A N S M I T T I N G A
L 3 T
R A N S P A R E N T
M
E S S A G E I N T H E
N
O N
- A
C K N O W L E D G M E N T
M
O D E
MS
LAPD
FURRM
HPIman
LAPD
BSC
OAMM
Dm_DL_UNIT
DATA _REQ
DL_DATA_IND
(UNIT DATA REQ)
(UNIT DATA REQ)
(UI frames)
The BSC requests to send a transparent L3 message in the non-
acknowledgment mode to the MS.
UNIT DATA REQ message contains the complete non-acknowledgment
mode L3 transparent message.