Adding a Common BTS (HDLC/HUB Transmission Mode)

This describes how to add a common BTS in HDLC/HUB transmission mode for the BSC, and how to configure the site device attributes, cell basic attributes, and TRX attributes.

Scenario	BSC initial configuration and BSC capacity expansion
Mandatory/Optional	Mandatory

NOTE:

BTSs in HDLC transmission mode do not support the Config AbisByPass function. BTSs in HUB transmission mode do not support the Config Ring or Config AbisByPass function. In addition, the multiplexing ratio of a BTS in HDLC/HUB mode should not exceed 4:1 During the initial configuration of a BTS in HDLC/HUB transmission mode, the multiplexing ratio is 4:1 by default.

Only the BTS3012, BTS3012AE, BTS3006C, BTS3002E, and BTS3012 II support the HDLC transmission mode.

Only the BTS3012, BTS3012AE, and BTS3012 II support the HUB transmission mode.

Prerequisites

The GEHUB is configured. For details, see Configuring the GEHUB.
There are idle ports on the GEHUB in the GMPS/GEPS.
The GXPUM/GXPUT is configured for the GMPS/GEPS where the GEHUB is located. For details, see Configuring the GXPUM and Configuring the GXPUT.
The GMPS/GEPS holding the GEHUB is configured with the GDPUX. For details, see Configuring the GDPUX.

Preparation

NOTE:

The following procedure takes how to add a BTS in HUB transmission mode to the GEHUB in the GEPS.

**Table 1** Example of the data negotiated and planned for adding a BTS
Parameter		Example	Source
Site Attributes	Site Name	BTS 1	Network planning
	Site Type	BTS3012	Network planning
	Upper-Level Port No.	0 Port of GEHUB	Network planning
	Service Mode	HDLC HubBTS	Network planning
	In Port	0	Network planning
	Active	Deselected	Network planning
	Config Ring	No	Network planning
	Backup OML	No	Network planning
Cell Attributes	Cell Name	Cell 1	Network planning
	Frequency Band	GSM900	Network planning
	MCC	460	Network planning
	MNC	01	Network planning
	LAC	8240	Network planning
	CI	1	Network planning
	BCC	1	Network planning
	NCC	1	Network planning
	Cell Extension Type	Common cell	Network planning
	Cell Type	Common cell	Network planning
TRX Attributes	Assigned Cell	Cell 1	Network planning
	Frequency configuration	988 (main BCCH frequency), 994	Network planning
	TRX configuration	TRX 0, TRX 1	Network planning
	FH Mode	None	Network planning
Antenna feeder attributes	Tributary No.	Downlink Tributary	Network planning
	Frequency Band	PGSM900	Network planning
	TRX Transmit and Receive Relationship	TRX No.1: 0, A TRX No.2: 1, B	Network planning

Procedure

Start the wizard for adding a BTS.
- When adding a BTS for the first time, you can start the wizard for adding a BTS only on the GEHUB in the GMPS or GEPS. On the BSC6000 Local Maintenance Terminal, right-click GEIUB in the GEPS.
- If a BTS already exists, you can add a cascaded BTS under this BTS. On the Management Tree tab page, right-click a BTS.
Choose Add Site from the shortcut menu. A dialog box is displayed, as shown in Figure 1.
Figure 1 Add Site dialog box (1)
Click Add Site. A dialog box is displayed, as shown in Figure 2.
Figure 2 Add New Site dialog box
Set the parameters by referring to Table 1.
NOTE:
The Support Separate option is available only to the BTS3012, BTS3012 II, and BTS3012AE. When Support Separate is selected, the BTS3012, BTS3012 II, and BTS3012AE can be optionally configured with DTRUs or QTRUs.

If Service Mode of a BTS is set to HDLC and Backup OML is set to Yes, then you need to select Configure Chain in Figure 7 after you add a cell.
Click OK. A dialog box is displayed, as shown in Figure 3.
Figure 3 Add Site dialog box (2)
Click Next. A dialog box is displayed, as shown in Figure 4.
Figure 4 Add Site dialog box (3)
Select a BTS, and then click Add Cell. A dialog box is displayed, as shown in Figure 5.
Figure 5 Adding a cell
Set the parameters by referring to Table 1.
NOTE:
To add multiple cells at a time, set Number of Cells. The added cells are named in the format of current Cell Name + sequence number.
Click OK. A dialog box is displayed, as shown in Figure 6.
Figure 6 Add Site dialog box (4)
Click Next. A dialog box is displayed, as shown in Figure 7.
Figure 7 Add Site dialog box (5)
Click Site Attributes. A dialog box is displayed, as shown in Figure 8.
Figure 8 Site Device Attributes dialog box
Double-click DDPU. A dialog box is displayed, as shown in Figure 9.
Figure 9 Set Antenna Feeder Property dialog box
NOTE:
- This takes the configuration of one antenna feeder port on the DDPU as an example. If the antenna feeder port is not required, you can delete the DDPU.
- You need to specify at least one TRX for the downlink tributary of the DDPU. For other tributaries, you can use the default settings.
- The DDPU has two paths: A and B. The two paths are independent of each other. The data configurations of the DDPU must be consistent with the physical connections, and the frequency band of the TRX must be the same as that of the DDPU.
Set the parameters by referring to Table 1, as shown in Figure 10.
Figure 10 Setting antenna feeder attributes
Right-click an idle slot holding the DTRU subrack in Figure 8 and then choose Add Board > TRU from the shortcut menu. A TRU is added.
Right-click the added TRU and choose Binding logical TRX from the shortcut menu. A dialog box is displayed, as shown in Figure 11.
Figure 11 Binding logical TRX dialog box
Set Assigned Cell by referring to Table 1.
Click OK to return to the dialog box, as shown in Figure 8.
Repeat 14 through 17 to configure more TRUs.
Click OK to return to the dialog box, as shown in Figure 7.
Click Next. A dialog box is displayed, as shown in Figure 12.
Figure 12 Add Site dialog box (6)
Click Cell Attributes. A dialog box is displayed, as shown in Figure 13.
Figure 13 Set Cell Attributes dialog box
Set the basic attributes of the cell by referring to Table 1.
NOTE:
- For two cells, the values of at least one of the following parameters should be different: MCC, MNC, LAC, and CI.
- If you select GPRS Support, the BSC must be configured with the built-in PCU. If the BTS does not support the GPRS function or the GPRS services are unavailable in the cell, do not select GPRS Support.
Click OK to return to the dialog box, as shown in Figure 12.
Click Finish. The configuration of the BTS is complete.
Activating a BTS.
1. On the Management Tree tab page of the BSC6000 Local Maintenance Terminal, right-click the target BTS and choose Site Operation > Set Site Active State from the shortcut menu. A dialog box is displayed, as shown in Figure 14.
  Figure 14 Set Site Active State dialog box
2. Under Site Active State, select Activated. Then, click Finish to complete the BTS activation.