ZTE Corporation ZXG-OB06 Manuale Utente
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
38
Confidential and Proprietary Information of ZTE CORPORATION
The L3 message structure on the Um interface is shown in Figure 21.
The protocol indicator is used to indicate the protocol type (RR, CM or
SMS).
SMS).
TI, a transaction identifier, is used to distinguish multiple concurrent
CM connections.
CM connections.
The message type indicates the function of the L3 message.
F
I G U R E
2 1
M
E S S A G E
S
T R U C T U R E O N T H E
U
M
I
N T E R F A C E
T1 flag
TI
Protocol Indicator
0
Message type
Information cell (compulsory)
Information cell (optional)
2. Abis interface
On the Abis interface, most of the radio interface signaling messages
are transmitted transparently in L3. It performs management over the
physical and logical equipment of ZXG10 OB06 (V1.0), including
physical and logical equipment of ZXG10 OB06 (V1.0), including
equipment start, release, parameter control and performance
monitoring, thus ensuring normal communication services. It divides
monitoring, thus ensuring normal communication services. It divides
the managed objects into four types: radio link layer, dedicated
channel, control channel and transceiver.
The message structure of L3 on the Abis interface is shown in Figure
22
channel, control channel and transceiver.
The message structure of L3 on the Abis interface is shown in Figure
22
The message discriminator indicates the message type (management
message of the radio link layer, management message of the
dedicated channel, management message of the common channel or
dedicated channel, management message of the common channel or
management message of TRX).
T indicates whether it is a transparent message.
The message type indicates the function of the L3 message.
The channel number indicates the channel combination type as well as
marks the timeslot number.
The link flag contains the contents such as SAPI and so on.
F
I G U R E
2 2
M
E S S A G E
S
T R U C T U R E O F
L 3
O N T H E
A
B I S
I
N T E R F A C E
Message identifier
T
Message type
Channel No.
Link ID
Other information cells