Configuring the Hybrid Topology Formed by HDLC BTS and TDM BTS Under HUB BTS

This describes how to configure the hybrid topology formed by the HDLC BTS and the TDM BTS under the HUB BTS.

Scenario	BSC initial configuration and BSC capacity expansion
Mandatory/Optional	Optional. The hybrid topology is configured when the HUB BTS is cascaded with the BTS in TDM transmission mode.

NOTE:

The E1 connection relation between boards need to be configured when the HUB BTS is cascaded with the BTS in TDM transmission mode. In addition, you are advised to add site chains to guarantee sufficient bandwidth.

Prerequisites

Preparation

NOTE:

The following procedure takes how to add a HUB BTS to the GEHUB in the GMPS and then configure a HDLC BTS and a TDM BTS under the HUB BTS as an example.

Table 1 Example of the data negotiated and planned for adding a BTS

Parameter		Example	Source
Attributes of BTS 1	Site Name	BTS 1	Network planning
	SiteType	BTS3012	Network planning
	Upper-Level Port No.	0 Port of GEHUB	Network planning
	Multiplexing Mode	4:1	Network planning
	FlexAbis Mode	Fix	Network planning
	Service Mode	HDLC HubBTS	Network planning
	In Port	0	Network planning
	Active	Deselected	Network planning
	Config Ring	No	Network planning
	Config AbisByPass	No	Network planning
Attributes of cell 1	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	59 (main BCCH frequency), 83	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
Attributes of BTS 2	Site Name	BTS 2	Network planning
	SiteType	BTS3012	Network planning
	Upper-Level Port No.	Site Port 1	Network planning
	Multiplexing Mode	4:1	Network planning
	FlexAbis Mode	Fix	Network planning
	Service Mode	HDLC	Network planning
	In Port	0	Network planning
	Active	Deselected	Network planning
	Config Ring	No	Network planning
	Config AbisByPass	No	Network planning
Attributes of cell 2	Cell Name	Cell 2	Network planning
	Frequency Band	GSM900	Network planning
	MCC	460	Network planning
	MNC	01	Network planning
	LAC	8240	Network planning
	CI	2	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	75 (main BCCH frequency), 98	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
Attributes of BTS 3	Site Name	BTS 3	Network planning
	SiteType	BTS3012	Network planning
	Upper-Level Port No.	Site Port 2	Network planning
	Multiplexing Mode	4:1	Network planning
	FlexAbis Mode	Fix	Network planning
	Service Mode	TDM	Network planning
	In Port	0	Network planning
	Active	Deselected	Network planning
	Config Ring	No	Network planning
	Config AbisByPass	No	Network planning
Attributes of cell 3	Cell Name	Cell 3	Network planning
	Frequency Band	GSM900	Network planning
	MCC	460	Network planning
	MNC	01	Network planning
	LAC	8240	Network planning
	CI	3	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	97 (main BCCH frequency), 103	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
E1 connection relation between boards	PEU Slot No.	18
	PEU Port No.	0
	EIU/OIU Slot No.	24
	EIU/OIU Slot No.	0

Procedure

1. Add a HUB BTS.
   1. On the BSC6000 Local Maintenance Terminal, right-click GEHUB in the GEPS.
   2. Choose Add Site from the shortcut menu. A dialog box is displayed, as shown in Figure 1.
      Figure 1 Add Site dialog box (1)
      
      

   3. Click Add Site. A dialog box is displayed, as shown in Figure 2.
      Figure 2 Add New Site dialog box
      
      

   4. Set the parameters by referring to Table 1.
      NOTE:

      The Support Separate option is available only for 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.

   5. Click OK. A dialog box is displayed, as shown in Figure 3.
      Figure 3 Add Site dialog box (2)
      
      

   6. Click Next. A dialog box is displayed, as shown in Figure 4.
      Figure 4 Add Site dialog box (3)
      
      

   7. Select a BTS, and then click Add Cell. A dialog box is displayed, as shown in Figure 5.
      Figure 5 Add New Cell dialog box
      
      

   8. 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.

   9. Click OK. A dialog box is displayed, as shown in Figure 6.
      Figure 6 Add Site dialog box (4)
      
      

   10. Click Next. A dialog box is displayed, as shown in Figure 7.
       Figure 7 Add Site dialog box (5)
       
       

   11. Click Site Attributes. A dialog box is displayed, as shown in Figure 8.
       Figure 8 Site Device Attributes dialog box
       
       

   12. 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 have 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 the frequency band of the DDPU.

   13. Set the parameters by referring to Table 1, as shown in Figure 10.
       Figure 10 Set Antenna Feeder Property dialog box
       
       

   14. Right-click an idle slot holding the DTRU subrack in Figure 8 and choose Add Board > TRU from the shortcut menu. A TRU is added.
   15. 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
       
       

   16. Set Assigned Cell by referring to Table 1.
   17. Click OK to return to the dialog box, as shown in Figure 8.
   18. Repeat 1.n through 1.q to configure more TRUs.
   19. Click OK to return to the dialog box, as shown in Figure 7.
   20. Click Next. A dialog box is displayed, as shown in Figure 12.
       Figure 12 Add Site dialog box (6)
       
       

   21. Click Cell Attributes. A dialog box is displayed, as shown in Figure 13.
       Figure 13 Set Cell Attributes dialog box
       
       

   22. Set the basic attributes of the cell by referring to Table 1.
       NOTE:

       • The CI of a cell must be unique.
       • 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.

   23. Click OK to return to the dialog box, as shown in Figure 12.
   24. Click Finish. The configuration of the BTS is complete.
2. Cascade a BTS in HDLC transmission mode.
   1. On the Management Tree tab page, right-click BTS 1.
   2. Cascade a BTS in HDLC transmission mode using the same method as adding a HUB BTS by referring to Table 1.
3. Cascade a BTS in TDM transmission mode.
   1. On the BSC6000 Local Maintenance Terminal, right-click the BSC6000 root node.
   2. Choose Configure Board E1 Connect from the shortcut menu. A dialog box is displayed, as shown in Figure 14.
      Figure 14 Configure Board E1 Connect dialog box
      
      

   3. Click Add. A dialog box is displayed, as shown in Figure 15.
      Figure 15 Add Board E1 Connect dialog box
      
      

   4. Set the E1 connection between boards by referring to Table 1.
   5. Click OK to return to the dialog box, as shown in Figure 14.
   6. Click Finish. The configuration of the E1 connection between boards is complete.
   7. On the Management Tree tab page, right-click BTS 1.
   8. Cascade a BTS in TDM transmission mode using the same method as adding a HUB BTS by referring to Table 1.
4. 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 16.
      Figure 16 Set Site Active State dialog box
      
      

   2. Under Site Active State, select Activated. Then, click Finish to complete the BTS activation.