Configuring Satellite Transmission over Abis Interface

This section describes how to activate, verify, and deactivate the optional feature GBFD-113901 Satellite

Transmission over Abis Interface.

Prerequisites

Dependency on Hardware

None

Dependency on Other Features

None

License

The license is activated.

Other Prerequisites

The cell to be verified is in normal state and has idle channels.

To ensure the normal processing of PS services in the satellite transmission mode, the PS cell

GPRS parameters T3168 must be set to 1000ms(1000ms), T3192 must be set to

1000ms(1000ms), and BS_CV_MAX must be set to 15.

Context

With satellite transmission over Abis interface, operators can deploy BTSs in areas that are difficult to be

reached through conventional terrestrial transmission, thus solving the communication problem in those

areas. Satellite transmission over Abis interface has a longer delay in information exchanges than

terrestrial transmission.

Procedure

Activation Procedure

Run the BSC6900 MML command SET BTSTRANS. In this step, set

Transmission Mode to SAT_TRANS(Satellite Transmission).

1.

Run the BSC6900 MML command SET BTSCLKPARA. In this step, set Clock

Mode to INCLK(Internal Clock).

2.

Optional: Run the BSC6900 MML command SET BTSLAPDWS. In this step, set

RSL LAPD Window Size to a proper value according to the actual delay.

NOTE:

RSL LAPD Window Size is set to 48 by default and can be set by the operator

according to the actual delay. A longer delay requires a larger value.

3.

Optional: Run the BSC6900 MML command SET GCELLCCTMR. In this step, set

T200 SDCCH to 100, set T200 SACCH SDCCH to 100, and set T200 SDCCH

SAPI3 to 200. You can adjust the settings of these parameters according to the

actual delay over the Abis interface. A longer delay requires a larger value.

4.

Optional: Run the BSC6900 MML command SET GCELLCCBASIC. In this step,

set MS MAX Retrans as required.

NOTE:

Adjusting MS MAX Retrans to a larger value increases the radio access rate and

adjusting MS MAX Retrans to a smaller value reduces the load of the RACH and

SDCCH.

5.

Verification Procedure

Configuring Satellite Transmission over Abis Interface http://localhost:7890/pages/31183948/11/31183948/11/resources/mbsc...

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Run the BSC6900 MML command DSP GCELLSTAT to query the status of the cell.

The expected result: Cell Service State is set to Yes.

1.

The MS initiates a call.2.

Trace the CS domain messages on the Abis interface by referring to Tracing CS

Domain Messages on the Abis Interface. In this step, click RSL under Trace Type.

The expected result: Complete signaling procedure of the mobile-originated call can

be seen.

3.

The MS performs the PING service after being connected to the network through

dial-up. The service succeeds.

4.

Deactivation Procedure

Run the BSC6900 MML command DEA BTS to deactivate the BTS.1.

Run the BSC6900 MML command SET BTSTRANS. In this step, set

Transmission Mode to TER_TRANS(Terrestrial Transmission).

2.

Run the BSC6900 MML command SET BTSCLKPARA. In this step, set Clock

Mode as required.

3.

Optional: Run the BSC6900 MML command SET GCELLCCTMR. In this step, set

T200 SDCCH to 60, set T200 SACCH SDCCH to 60, and set T200 SDCCH SAPI3

to 60. Adjust the settings of these parameters according to the actual delay over the

Abis interface. A longer delay requires a larger value.

4.

Optional: Run the BSC6900 MML command SET GCELLCCBASIC. In this step,

set MS MAX Retrans to 2_Times(2_Times). Adjust MS MAX Retrans as required.

5.

Optional: Run the BSC6900 MML command SET GCELLPSBASE. In this step,

set T3168 to 500ms(500ms), set T3192 to 500ms(500ms), and set BS_CV_MAX

to 10.

6.

Run the BSC6900 MML command ACT BTS to activate the BTS.7.

Parent topic: Configuring the Satellite Transmission

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