ZTE Corporation ZXG-BTS2 Manuale Utente
Chapter 4 - System Functions
Confidential and Proprietary Information of ZTE CORPORATION 71
F
I G U R E
4 7
C
O N N E C T I O N
A
S S I G N M E N T
MS
LAPD
FURRM
HPIMa
LAPD
BSC
OAMM
DATA REQ
(ASSIGN CMD)
DL_DATA_IND (DATA REQ
(ASSIGN CMD))
Dm_DL_DATA_RE
Q (ASSIGN CMD)
(ASSIGN
CMD)
O
ld
channel
DATA IND
(ASSIGN FAIL)
DL_DATA_REQ (DATA IND
(ASSIGN FAIL))
Dm_DL_DATA_IN
D (ASSIGN FAIL)
(ASSIGN
FAIL)
DATA IND
(ASSIGN COMP)
DL_DATA_REQ (DATA IND
(ASSIGN COMP))
Dm_DL_DATA_IN
D (ASSIGN
COMP)
(ASSIGN
COMP)
O
ld
channe
l
New c
h
a
nnel
The wireless link is changed in the same cell.
The BSC commands the BTS activation through a simple
The BSC commands the BTS activation through a simple
request/acknowledgement procedure (see the CHAN ACTIV and CHAN
ACTIV ACK of the “access” procedure).Once the BTS is activated, the
ACTIV ACK of the “access” procedure).Once the BTS is activated, the
BSC commands the MS to perform channel change through the (RR)
ASSIGNMENT COMMAND message. When the MS changes its settings
ASSIGNMENT COMMAND message. When the MS changes its settings
according to the new information and establishes a new signaling link,
the MS sends a (RR) ASSIGNMENT COMPLETE message to the BSC. If
the MS cannot implement the connection allocation for some reasons,
the MS sends a (RR) ASSIGNMENT COMPLETE message to the BSC. If
the MS cannot implement the connection allocation for some reasons,
it will send the (RR) ASSIGNMENT FAILURE message on the original
channel.
The FURRM transfers transparently the (RR) ASSIGNMENT COMMAND,
(RR) ASSIGNMENT COMPLETE and (RR) ASSIGNMENT FAILURE
channel.
The FURRM transfers transparently the (RR) ASSIGNMENT COMMAND,
(RR) ASSIGNMENT COMPLETE and (RR) ASSIGNMENT FAILURE
messages.
Encryption
The encryption is shown in Figure 48.