ZTE Corporation ZXG-OB06 Manuel D’Utilisation

 
ZXG10 OB06 ZTE  Integrated Outdoor GSM Base Station Technical Manual 

Confidential and Proprietary Information of ZTE CORPORATION 

Connection Failure 

The procedure of connection failure is shown in Figure 59. 

MS

LAPDm

FURRM

HPIMan

LAPD

BSC

OAMM

M PH_CHPIndToRR 

(CHP CONN FAIL 

IND)

(CONN FAIL IND) 

DL_DATA _REQ (CONN FAIL IND)

 

The CONN FAIL IND message that is sent from the OB06 to the BSC 

indicates the BSC that one activated channel cannot be used as more for 
some reasons. 

When this message is received, the network side will release the channel. 
The message contains the cause parameter, including the following causes: 

1.  Radio link fault (Section 5 in GSM 05.08). The OB06 judges whether 

there is any fault according to the uplink SACCH error rate or 

RXLEV/RXQUAL test. 

2.  Hardware error (decoder fault, for example). 
3. Others 
The CHP module will report the error to the FURRM module. In addition, in 
case of failed handov

er or mis-synchronization between 

CHP and TC, the 

FURRM also sends this message to the BSC. 

Error Report 

The OB06 sends the ERROR REPORT message to the BSC, notifying the 

following errors that cannot be reported with other procedures. 

When the OB06 receives an error message, it ignores the message and 
reports to the BSC. Here, the ERROR REPORT is the message involving all 

error causes other than the CHAN ACTIV NACK for channel activation and 
the MODE MODIFY NACK for channel mode modification. 

The error causes include message ID error, message type error, message 

sequence error, information unit error, and channel status mismatch. 

O&M 

The OB06 provides powerful O&M functions to implement management 
and maintenance of the OB06 equipment. The functions fall into three 

parts: parameter configuration, alarm and status reporting, and online 
software loading.