ZTE Corporation ZXG-BTS2 Manual Do Utilizador

 
ZXG10-BTS (V2.9) Technical Manual 

Confidential and Proprietary Information of ZTE CORPORATION  

Public Channel Management Function 

This function supports the following procedures:  

1.  MS channel request procedure: This procedure is triggered when the 

TRX detects the random access of an MS. 

2. Paging procedure: This procedure is used to page an MS in the 

specified paging sub-channel. It is used for the mobile called, and is 
started by the MSC through the BSC. The BSC determines the paging 

team according to the IMSI of the called MS. The value of the paging 
team and the MS IMSI are sent to the BTS. 

3. Immediate assignment procedure: With this procedure, the BSC 

immediately assigns a dedicated channel to the MS that just accesses 
the BTS. 

4.  Deletion indication procedure: With this procedure, the BTS gives the 

BSC an indication that an immediate assignment message is deleted 

due to overload on the AGCH. 

5. CCCH overload indication procedure: With this procedure, the BTS 

indicates to the BSC the load of the specified CCCH. 

6.  Broadcast information change procedure: With this procedure, the BSC 

indicates to the BTS the new system messages broadcast on the BCCH. 

7.  Short message cell broadcast procedure: With this procedure, the BSC 

requests the BTS to send the cell broadcast short message. 

Access Request 

The access request is shown in Figure 57. 

 

MS 

LAPD

FURRM 

HPIMan 

LAPD 

BSC 

OAMM 

(CHAN RQD) 

Dm_DL_RANDOM 

ACCESS_IND 

(CHAN REQ) 

DL_DATA_REQ (CHAN RQD) 

 

 

When the TRX receives the MS random access request, it sends the 

channel request message to the BSC. 

The CHAN RQD message contains the Request Reference parameter (MS-

selected random number, low-order bit of the TDMA frame number) and 
access burst pulse sequence measurement delay.