GSM Feature Configuration

GSM Feature Configuration

Issue 01

Date 2010-11-04

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

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Website: http://www.huawei.com

Email: [email protected]

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GSM Feature Configuration About This Document

About This Document

PrerequisitesThe incremental MML commands are exported from the Configuration Management Express (CME). For each verification, commands should be delivered one by one according to verification descriptions and results should be observed.

Configuration Express DescriptionThe BSC Configuration Express refers to the ingress for configuring objects of the BSC level. As shown in the following figure, select GSM from the Transport navigation tree on the left of the Planned area. All the nodes under the GSM tree belong to the BSC Configuration Express.

The BTS Configuration Express refers to the ingress for configuring objects of the BTS level. Right-click any BTS in the Main navigation tree on the left of the Planned area and select BTS Configuration Express. The interface for configuring BTS parameters is displayed.

The Cell Configuration Express refers to the ingress for configuring objects of the cell level. Right-click any cell in the Main navigation tree on the left of the Planned area and the Cell Configuration Express interface is displayed. Alternatively, in the interface for BTS


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About This Document GSM Feature Configuration

topology configuration, right-click any cell, and the Configure Cell Parameter interface is displayed, which is the Cell configuration Express.

The Neighboring Cell Configuration Express refers to the ingress for configuring neighboring cells. Right-click any GSM cell in the Main navigation tree on the left of the Planned area and select Neighboring Cell Configuration Express. The interface for neighboring cell configuration is displayed. Select the cell for which neighboring cells need to be configured from the object tree on the left of the interface for neighboring cell configuration. The information about the configured neighboring cells of this cell is displayed on the upper area on the left of the configuration interface. To configure bidirectional neighboring cells, select Bidirectional. Set the GSM cell to be a neighboring cell.

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Issue 01 (2010-11-04)

GSM Feature Configuration Contents

Contents

About This Document.......................................................................iii

1 Configuring System Information Sending.....................................1-1

2 Configuring Hybrid Cell...............................................................2-1

3 Configuring Enhanced Dual-Band Network...................................3-1

4 Configuring Frequency Hopping...................................................4-1

5 Configuring BCCH Carrier Frequency Hopping...............................5-1

6 Configuring Antenna Frequency Hopping.....................................6-1

7 Configuring MSC Pool..................................................................7-17.1 Configuring MSC Pool (A Interface over TDM)...........................................................................................7-1

7.2 Configuring MSC Pool (A Interface over IP).................................................................................................7-3

8 Configuring GSM/WCDMA Interoperability....................................8-1

9 Configuring GSM/WCDMA Service Based Handover.......................9-1

10 Configuring GSM/WCDMA Load Based Handover.......................10-1

11 Configuring 2G/3G Cell Reselection Based on MS State.............11-1

12 Configuring Satellite Transmission...........................................12-112.1 Configuring Satellite Transmission over Abis Interface............................................................................12-1

13 Configuring Active Power Control.............................................13-1

14 Configuring Dynamic Adjustment Between FR and HR...............14-1

15 Configuring Cell Broadcast......................................................15-115.1 Configuring Short Message Service Cell Broadcast (TS23)......................................................................15-1

15.2 Configuring Simplified Cell Broadcast......................................................................................................15-3

16 Configuring Voice Quality Index (Uplink VQI)............................16-1

17 Configuring Dynamic Adjustment of Uplink MCS Coding............17-1

18 Configuring Packet Channel Dispatching..................................18-118.1 Configuring the Feature of EGPRS Special Channel Be Used by Only EGPRS Service..........................18-2

18.2 Configuring the Feature of EGPRS Preferred Channel..............................................................................18-1


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ContentsiSite BTS3001C-116Product Description

18.3 Configuring the Feature of Channel Multiplexing in the E Down G Up Scenario....................................18-2

19 Configuring Guaranteed Emergency Call...................................19-1

20 Configuring Abis over IP............................................................................20-1

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GSM Feature Configuration 20 Configuring System Information Sending

1 Configuring System Information

Sending

Prerequisites The original cells have 2G neighboring cells.

Set INTERRATCELLRESELEN of the original cells to YES.

Context

System information involves main radio network parameters on the Um interface, including network identity parameters, cell selection parameters, system control parameters, and network function parameters. Based on the received system message, an MS can properly select and access a radio network. Then, the MS can fully use various services provided by the network and well cooperate with the network.

Procedure

Configuration steps

Step 1 Configure other software parameters of BSC. In this step, set Support Sent 2QUATER to YES. Configuration method: Select a BSC node under GSM in the Transport navigation tree on the left of the Planned area to display the interface for configuring the BSC, and then choose Software Parameter Configuration > Other Software Parameters.

Verification steps

Step 2 Export and deliver the incremental MML command.

Step 3 Trace circuit switched (CS) domain messages on the Abis interface. In the Trace Type area, click RSL to trace RSL messages on the Abis interface

Step 4 Run the MML command SND GCELLSYSMSG. In this step, set Index Type to BYID, and fill in the correct cell ID.

Step 5 View the CS domain messages traced on the Abis interface.

Step 6 Expected result: si2-quarter-ind in System Information Type 3 message is 0.

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GSM Feature Configuration 20 Configuring Hybrid Cell

2 Configuring Hybrid Cell

Prerequisites

The BTS must support the configured frequency bands.

Context

Hybrid cells can increase the cell capacity, decrease the number of handovers, and reduce system interference. They can be used to solve the problems of continuous coverage and sporadic coverage in hotspot areas.

A hybrid cell consists of an underlaid subcell and an overlaid subcell. The frequency band configuration is as follows:

If the overlaid subcell is configured in the DCS1800 band, the underlaid cell is configured in the GSM900 or GSM850 band.

If the overlay cell is configured in the PCS1900 band, the underlaid cell is configured in the GSM850 band.

The signal loss of the DCS1800 band changes with the transmission distance. At the distance of 0.5 km to 1 km, signals of the DCS1800 band are about 15 dB weaker than those of the GSM900 band.

The configuration of the hybrid cell should comply with the following principles:

Generally, a channel in the overlaid subcell is not directly assigned to a call, an incoming inter-cell handover request is not directly assigned to the overlaid subcell, and a call beyond the coverage of the DCS1800 TRX is not forcibly assigned to the overlaid subcell.

The traffic in the underlaid subcell and the overlaid subcell should be properly assigned to maintain the load balance between the overlaid subcell and the underlaid subcell.

Generally, the GSM900 or GSM850 TRX is configured in the underlaid cell to expand the coverage, whereas the DCS1800 or PCS1900 TRX is configured in the overlaid cell to absorb the traffic. Therefore, the BCCH is generally configured on the GSM900 TRX. The priorities of different types of TRXs are: P-GSM > E-GSM > R-GSM.

The frequency hopping (FH) between GSM900 and DCS1800 is not allowed. The FH within the same frequency band is allowed.


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14 Configuring Hybrid Cell GSM Feature Configuration

Avoid using a multi-layer concentric cell due to inconsistent combination modes of the TRXs on the same frequency band. A multi-layer concentric cell affects the network KPIs, such as the handover success rate and assignment success rate.

Procedure

Configuration steps

Step 1 Optional: Configure basic attributes of the BTS. When the frequency band of a cell is set to GSM850_1900, set Support High Frequency Band to PCS1900. Configuration method: Select a BSC node under GSM in the Transport navigation tree on the left of the Planned area to display the interface for configuring the BTS, and then choose BSC > BSC Basic Info > Basic Attributes of BSC. Set Support Dual High Frequency Band to PCS1900.

If you need to add a hybrid cell, set the frequency band of the cell to GSM900_DCS1800 or GSM850_1800.

Step 2 Add a cell. In this step, set the type of the hybrid cell to be added.

Step 3 Set BCCH IUO of Double Frequency Cell and Cell IUO Type. Configuration method: In the Main navigation tree on the left of the Planned area, right-click any dual-band cell and choose Cell Configuration Express > Cell Attributes > GSM Cell. Then set the attributes of the cell, such as the BCCH IUO of Double Frequency Cell, Cell IUO Type, and Enhanced Concentric Allowed.

Step 4 Configure the intelligent underlay overlay (IUO) handover parameters of the cell. Configuration method: Choose Cell Configuration Express > Handover Data > IUO handover parameter.

Verification steps

Step 5 Run the BSC6900 MML command LST GCELL to query the attributes of the cell such as Cell Inner/Extra Property and BCCH IUO of Double Frequency Cell.

Step 6 Run the BSC6900 MML command LST GCELLHOIUO to query the handover parameters in the concentric cell.

----End

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GSM Feature Configuration 20 Configuring Enhanced Dual-Band Network

3 Configuring Enhanced Dual-Band

Network

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-114402 Enhanced Dual-Band Network.

Prerequisites The license is activated.

When two cells belong to different operators, the enhanced dual-band network cannot be configured.

Before changing the mapping between cells and operators, check whether the enhanced dual-band network is configured. If the enhanced dual-band network is configured, modify the attributes of the enhanced dual-band network.

Context

The enhanced dual-band network is an enhancement of the existing dual-band network. In the enhanced dual-band network, two single-band cells at the same level and layer with different coverage areas logically form a cell group with two bidirectional neighboring cells. One is an overlaid subcell and the other is an underlaid subcell. In the enhanced dual-band network algorithm, channel resources can be shared and cell load is balanced between the two cells in a cell group.

Procedure

Configuration steps

Step 1 Add bidirectional neighboring cells. A GSM900 cell and a DCS1800 cell are configured in a BSC. Configure the two cells as bidirectional neighboring cells. Configuration method: Right-click a GSM cell in the Main navigation tree on the left of the Planned area and select Neighboring Cell Configuration Express. The interface for neighboring cell configuration is displayed. Select the cell for which neighboring cells need to be configured from the object tree on the left of the interface for neighboring cell configuration. The information about the configured neighboring cells of this cell is displayed on the upper area on the left of the configuration interface. Select Bidirection for configuring bidirectional neighboring cells. Click the Add button to add neighboring cells.


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14 Configuring Enhanced Dual-Band Network GSM Feature Configuration

Step 2 Set the attributes of the concentric cell. That is, modify the attributes of a GSM900 cell. In this step, set Cell IUO Type to Enhanced Double Frequency Cell, Cell Inner/Extra Property to Extra, and Same Group Cell Index to the index of the DCS1800 cell. Configuration method: Select any cell from the Main navigation tree on the left of the Planned area. Then choose Cell Configuration Express > Cell Attributes > GSM Cell.

Verification steps

Verify the call access function in the enhanced dual-band network.

Step 3 Run the MML command SET GCELLCCBASIC twice to respectively set ECSC of the two cells to YES.

Step 4 Run the MML command SET GCELLCCBASICPARA twice to respectively set Directed Retry of the two cells to YES.

Step 5 Run the MML command SET GCELLHOEDBPARA to set the parameters of the GSM900 cell. In this step, set UL Subcell Assignment Optimization to YES, UL Subcell Lower Load Threshold to 0, UL Subcell General Overload Threshold to 1, and Distance Between Boundaries of Subcells and Distance Hysteresis Between Boundaries to 0. Set Load HO Allowed and Load HO of OL Subcell to UL Subcell to NO.

Step 6 Make test MS1 and test MS2 (both supporting the frequency bands of 900 MHz and 1800 MHz) camp on the GSM900 cell. Then, use MS1 to make a call to a fixed-line phone. MS1 is assigned to a channel of the GSM900 cell.

Step 7 Maintain the call of MS1 and use MS2 to make a call to a fixed-line phone in the GSM900 cell. MS2 is assigned to a channel of the DCS1800 cell because the load of the underlaid subcell is higher than the value of UL Subcell General Overload Threshold. This indicates that the call in the underlaid subcell can be assigned to the overlaid subcell when the traffic in the underlaid subcell is heavy and the signals in the overlaid subcell are strong enough.

Step 8 Terminate all the calls. Run the MML command SET GCELLHOEDBPARA to set the parameters of the DCS1800 cell. In this step, set UL Subcell Assignment Optimization to NO, OL Subcell Assignment Optimization to YES, UL Subcell Lower Load Threshold to 50, and UL Subcell General Overload Threshold to 80.

Step 9 Run the MML command SET GCELLHOCTRL to set the parameters of the DCS1800 cell. In this step, set Min Power Level For Directed Retry to 0.

Step 10 Make MS1 camp on the DCS1800 cell and originate a call. MS1 is assigned to the underlaid GSM900 subcell because the load of the underlaid subcell is not higher than the value of UL Subcell Lower Load Threshold. This indicates that calls in the overlaid subcell can be assigned to the underlaid subcell when the traffic in the underlaid subcell is light.

Step 11 Verify the handover function in the enhanced dual-band network.

Step 12 Run the MML command SET GCELLHOBASIC. In this step, set all the handover type parameters to NO and Edge HO DL RX_LEV Threshold to 4. Run the MML command SET GCELLHOEDBPARA to set the parameters of the DCS1800 cell. In this step, set UL Subcell Assignment Optimization to NO, OL Subcell Assignment Optimization to NO, UL Subcell Lower Load Threshold to 50, UL Subcell General Overload Threshold to 80, Load HO Allowed to YES, and Load HO of OL Subcell to UL Subcell to YES.

Step 13 Make MS1 camp on the DCS1800 cell and originate a call to a fixed-line phone. MS1 is assigned to a channel in the overlaid subcell. Then, MS1 is handed over to the GSM900 cell because the load of the underlaid subcell is lower than the value of UL Subcell General Overload Threshold. The HANDOVER PERFORM message can be traced on the A interface and the handover cause value in the message is traffic.


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GSM Feature Configuration 20 Configuring Enhanced Dual-Band Network

Step 14 Maintain the call of MS1. Then, run the MML command SET GCELLHOEDBPARA to set the parameters of the GSM900 cell. In this step, set UL Subcell Assignment Optimization to NO, OL Subcell Assignment Optimization to NO, UL Subcell Lower Load Threshold to 0, UL Subcell General Overload Threshold to 1, Load HO Allowed to YES, and Load HO of OL Subcell to UL Subcell to YES.

Step 15 The call is handed over from the GSM900 cell back to the DCS1800 cell because the load in the underlaid subcell is higher than the value of UL Subcell General Overload Threshold. The HANDOVER PERFORM message can be traced on the A interface and the handover cause value in the message is traffic.

Step 16 Maintain the call. Then, run the MML command SET GCELLHOEDBPARA to set the parameters of the DCS1800 cell. In this step, set UL Subcell Assignment Optimization to NO, OL Subcell Assignment Optimization to NO, UL Subcell Lower Load Threshold to 0, UL Subcell General Overload Threshold to 1, Load HO Allowed to NO, Load HO of OL Subcell to UL Subcell to NO, Incoming OL Subcell HO Level TH to 63, Outgoing OL Subcell HO Level TH to 62, and Inner Cell EDGE HO Enable to YES.

Step 17 MS1 is handed over the GSM900 cell because the receive level of MS1 is lower than the level of Outgoing OL Subcell HO Level TH. The HANDOVER PERFORM message can be traced on the A interface and the handover cause value in the message is better cell.

This type of edge handover requires that the underlaid subcell is more preferably selected as the target cell for handover than the overlaid subcell. You can change the level of the underlaid subcell to be higher than the level of the overlaid subcell.

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GSM Feature Configuration 20 Configuring Frequency Hopping

4 Configuring Frequency Hopping

This chapter describes how to activate and verify the optional feature GBFD-113701 Frequency Hopping. This function consists of radio frequency (RF) FH and baseband FH.

Prerequisites Dependency on hardware

The cell must be configured with at least two TRXs.

Dependency on other features

None

License

None

Context

FH can simplify frequency planning, enhance the anti-interference capability of the system, increase the system capacity, and effectively improve the voice quality.

When the packet switched (PS) services use high-rate coding schemes such as CS3, CS4, and MCS5 to MCS9, the application of FH will affect the PS services and cause negative impacts on the network. In this case, you are not advised to enable the FH function.

When the call state is Active, the FH feature can be configured quickly.

Procedure

Configuration steps

Step 1 Set the FH type of the cell. Configuration method: Right-click a cell in the Main navigation tree on the left of the Planned area and select Configure MA Group…. The dialog box for configuring FH is displayed. In the Cell Hop Information area, select Cell Hop Mode.

Step 2 Add a MA group of the cell. Configuration method: In the interface for configuring FH, click the Add button. Remarks: The system may automatically add FH groups. You can reset Head Slot No, Hop Mode, and FREQ as needed.

Set Hop Mode to BaseBand FH or RF FH as required.

If the BCCH participates in baseband FH, the cell must be configured with at least two FH groups.


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14 Configuring Frequency Hopping GSM Feature Configuration

Step 3 Set FH indexes and MAIOs of channels. That is, set Channel Hop Index and Channel MAIO. Configuration method: Set frequency numbers and hop modes of TRXs, and hop indexes and MAIOs of channels 0 to 7 in the Trx Channel Information area. The BCCH TRX is identified in yellow on the CME. The system automatically allocates frequency numbers, which you can modify as required. If you need to apply the FH attribute of the current channel to other channels of the same TRX, select Synchronized TimeSlot. In this case, if the FH attribute of the channel is changed, the system automatically changes the FH attribute of other channels of the same TRX.

If the same FH group is used for various TRXs, the MAIO of the same channel of the TRXs must be different.

Step 4 When the setting is completed, click the Apply button.

Step 5 Activate the cell.

Verification steps

Step 6 Run the BSC6900 MML command SET GCELLHOPQUICKSETUP. In this step, set Index Type to BYID(By Index) and then specify Cell Index, and set Frequency Hopping Mode to BaseBand FH and Frequency Hopping Mode of BCCH TRX to Hop.

Step 7 Use an MS to initiate a call in the cell to be verified. The call is initiated successfully and the voice quality is good. In the Abis signaling tracing window, the Assignment Command message is traced, and the value of the information element h:rf-hopping-channel in the message is 1.

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GSM Feature Configuration 20 Configuring BCCH Carrier Frequency Hopping

5 Configuring BCCH Carrier

Frequency Hopping

This chapter describes how to activate and verify the optional feature GBFD-113702 BCCH Carrier Frequency Hopping.


The cell must be configured with at least two TRXs.


− This feature depends on baseband FH in GBFD-113701 Frequency Hopping.

− This feature and the RF FH in GBFD-113701 Frequency Hopping are mutually exclusive.

License

The license is activated.

Context

FH can simplify frequency planning, enhance the anti-interference capability of the system, increase the system capacity, and effectively improve the voice quality.

When the packet switched (PS) services use high-rate coding schemes such as CS3, CS4, and MCS5 to MCS9, the application of FH will affect the PS services and cause negative impacts on the network. In this case, you are not advised to enable the FH function.

When the call state is Active, the BCCH carrier FH can be activated quickly.

Procedure

Configuration steps

Step 1 Set the FH type of the cell. Configuration method: Right-click a cell in the Main navigation tree on the left of the Planned area and select Configure MA Group…. The dialog box for configuring FH is displayed. In the Cell Hop Information area, select Cell Hop Mode.


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14 Configuring BCCH Carrier Frequency Hopping GSM Feature Configuration

Step 2 Add a MA group of the cell. Configuration method: In the interface for configuring FH, click the Add button . Remarks: The system may automatically add FH groups. You can reset High Slot No, Hop Mode, and FREQ as needed.

Set Hop Mode to BaseBand FH or RF FH as required.

If the BCCH participates in baseband FH, the cell must be configured with at least two FH groups.

Step 3 Set FH indexes and MAIOs of channels. That is, set Channel Hop Index and Channel MAIO. Configuration method: Set frequency numbers and hop modes of TRXs, and hop indexes and MAIOs of channels 0 to 7 in the Trx Channel Information area. The BCCH TRX is identified in yellow on the CME. The system automatically allocates frequency numbers, which you can modify as required. If you need to apply the FH attribute of the current channel to other channels of the same TRX, select Synchronized TimeSlot. In this case, if the FH attribute of the channel is changed, the system automatically changes the FH attribute of other channels of the same TRX.

If the same FH group is used for various TRXs, the MAIO of the same channel of the TRXs must be different.

The BCCH participates in baseband FH and channel 0 does not participate in FH. Set Channel Hop Index to 255.


Step 5 Activate the cell.

Verification steps

Step 6 Run the BSC6900 MML command SET GCELLHOPQUICKSETUP. In this step, set Cell Index to the index of the cell to be verified, Cell Hop Model to BaseBand FH, and Frequency Hopping Mode of BCCH TRX to Hop.

Step 7 Use an MS to initiate a call in the cell to be verified. The call is initiated successfully and the voice quality is good. In the Abis signaling tracing window, the Assignment Command message is traced, and the value of the information element h:rf-hopping-channel in the message is 1.

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GSM Feature Configuration 20 Configuring Antenna Frequency Hopping

6 Configuring Antenna Frequency

Hopping

This chapter describes how to activate the optional feature GBFD-113703 Antenna Frequency Hopping.


− The BTS must be a double-density BTS or a 3900 series BTS.

− At least two antennas are used in the cell that participates in antenna FH.


None

License


Context

Antenna FH enables the downlink data on each TRX to be randomly transmitted on other TRXs. This improves the data receiving quality of an MS from the BCCH TRX and the data sending quality of the BCCH TRX, thus improving the network performance.

If the cell supports both baseband FH and antenna FH, the TRX involved in baseband FH must also participate in antenna FH.

Procedure

Configuration steps

Step 1 Deactivate the cell.

Step 2 Set an antenna hopping group of the cell. Configuration method: Right-click the cell, choose Configure Hop Antenna Group > Cell Hop Antenna Support, and then set Cell Antenna Hopping to YES_HPANT.

Step 3 Add an antenna hopping group of the cell. Configuration method: Set Cell Antenna Hopping to YES_HPANT and then click the Add button. To modify the TRX list, double-click TRXList.


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14 Configuring Antenna Frequency Hopping GSM Feature Configuration


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GSM Feature Configuration 20 Configuring MSC Pool

7 Configuring MSC Pool

About This Chapter

The MSCs in the MSC pool share load and resources for even traffic allocation in the MSC pool, thus reducing inter-MSC handovers and providing the function of disaster recovery backup.

7.1 Configuring MSC Pool (A Interface over TDM)

This section describes how to activate, verify, and deactivate the optional feature GBFD-117401 MSC Pool based on the A interface transmission over time division multiplexing (TDM).

7.2 Configuring MSC Pool (A Interface over IP)

This section describes how to activate, verify, and deactivate the optional feature GBFD-117401 MSC Pool based on the A interface transmission over Internet Protocol (IP).

7.1 Configuring MSC Pool (A Interface over TDM)

This section describes how to activate, verify, and deactivate the optional feature GBFD-117401 MSC Pool based on the A interface transmission over TDM.


None


None

License


Others


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14 Configuring MSC Pool GSM Feature Configuration

− The MSC servers and the media gateways (MGWs) are fully interconnected and the data is correctly configured.

− The originating signaling point (OSP) is configured.

Context

An MSC pool consists of multiple MSCs that are connected with each other. The BSC6900 is interconnected each of the MSCs. All the MSCs in the MSC pool share load and resources for even traffic allocation in the MSC pool, thus reducing inter-MSC handovers and providing the function of disaster recovery backup.

Procedure

Configuration steps

Step 1 Configure data of MSC servers and MGWs. For more detailed operations, see the user manual of the MSC product.

Enable the MSC pool function on the MSC side.

On the MSC side, set whether the BSC6900 supports A-Flex to YES.

Configure the parameters related to the MSC pool, such the NRI, NULL_NRI, and available capacities of the MSCs, mobile network code of the local MSC, and MSC IDs. Ensure that all the parameter values are the same as those configured on the BSC6900 side.

Step 2 Add a destination signaling point (DSP). Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select Destination Signalling Point in the expanded BSC configuration tree.

When multiple DSPs are added, the first added one is the default DSP.

Step 3 Add a GSM CN node. Configuration method: Select an MSC under GSM in the Transport navigation tree on the left of the Planned area, and then select GSM CN Node in the expanded MSC configuration tree.

Step 4 Add an A Interface E1/T1. Configuration method: Select the A node under GSM in the Transport navigation tree on the left of the Planned area, and then select A Interface E1/T1 in the expanded A interface configuration tree.

In the same destination signaling point code (DPC) group, the start circuit identification codes (CIC) of different ports must be different.

Step 5 Add a GSM operator. In this step, set MSC Pool Function Enabled to YES, and specify Length of NRI in TMSI and MSC NULL-NRI Value. Ensure that all these parameter values are the same as those configured on the MSC side. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select GSM CN Operator in the expanded BSC configuration tree.

Step 6 Add the mapping between a network resource identifier (NRI) and an MSC. Ensure that the NRI value is the same as that configured on the MSC side. Configuration method: Select an MSC under GSM in the Transport navigation tree on the left of the Planned area, and then select NRI-MSC Mapping in the expanded MSC configuration tree.

Verification steps


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Step 7 MSC1 and MSC2 compose an MSC pool. Enable the temporary mobile station identity (TMSI) reallocation function on the core network (CN).

Step 8 Prepare two MSs, both of which are registered with the MSC pool.

Step 9 On the local maintenance terminal (LMT), start the A interface message tracing in the directions of MSC1 and MSC2. In this step, respectively set MSC DPC (Hex) to the DPC of the corresponding MSC, and Cell ID (cell1, cell2, … cell16) to the ID of the cell that the corresponding MS camps on.

Step 10 Power on MS1. Use MS1 to initiate a location update procedure on MSC1 side. The CN assigns a TMSI to MS1.


To enable an MS to initiate a location update at a specific MSC, run the BSC6900 MML command MOD GCNNODE to set the administrative states of all the other MSCs to UNAVAIL(Unavailable). After the location update, change the states of these MSCs to NORMAL again.

Step 12 When both MSC1 and MSC2 are normal, move the two MSs to a location area beyond the coverage area of the MSC pool, and use the MSs to respectively originate a call again.

Step 13 Expected result: Observe the MSCs that the MSs camp on, and find that MS1 sets up the call on the MSC1 side and MS2 sets up the call on the MSC2 side and that the home MSCs of both MSs remain unchanged.

In the TMSI reallocation procedure, an MSC assigns the TMSI that contains NRI (configured by the CN) to an MS. With this information, the BSC6900 allocates the service to the corresponding MSC when the MS originates a call service. Note that the mapping between the NRI and the MSC on the BSC6900 side must be consistent with the one configured on the CN side. You can use the BSC6900 MML command ADD NRIMSCMAP to configure the mapping on the BSC6900 side.

----End

7.2 Configuring MSC Pool (A Interface over IP)This section describes how to activate, verify, and deactivate the optional feature GBFD-117401 MSC Pool based on the A interface transmission over IP.


None


None

License


Others

− The MSC servers and the MGWs are fully interconnected and the data is correctly configured.

− The local MTP3 User Adaptation Layer (M3UA) entity and signaling points are configured.


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14 Configuring MSC Pool GSM Feature Configuration

Context

An MSC pool consists of multiple MSCs that are connected with each. The BSC6900 is interconnected with each of the MSCs. All the MSCs in the MSC pool share load and resources for even traffic allocation in the MSC pool, thus reducing inter-MSC handovers and providing the redundancy function.

Procedure

Configuration steps

Step 1 Configure data of MSC servers and MGWs. For more detailed operations about parameter configuration, see the user manual of the MSC product.

Enable the MSC pool function on the MSC side.

On the MSC side, set whether the BSC6900 supports A-Flex to YES.

Configure the parameters related to the MSC pool, such as the NRIs, NULL_NRIs, and available capacities of the MSCs, mobile network number of the local MSC, and MSC IDs.

Step 2 Add an M3UA destination entity. Configuration method: select an MSC under GSM in the Transport navigation tree on the left of the Planned area, and then select M3UA Destination Entity in the expanded MSC configuration tree.

Step 3 Add an M3UA link set. Configuration method: Select the A node under GSM in the Transport navigation tree on the left of the Planned area, and then select M3UA Link Set under the A Interface Over IP node in the expanded A interface configuration tree.

Step 4 Add an M3UA route. Configuration method: Select the A node under GSM in the Transport navigation tree on the left of the Planned area, and then select M3UA Route under the A Interface Over IP node in the expanded A interface configuration tree.

Step 5 Add an M3UA link. Configuration method: Select the A node under GSM in the Transport navigation tree on the left of the Planned area, and then select M3UA Link under the A Interface Over IP node in the expanded A interface configuration tree.

Step 6 Add a GSM operator. In this step, set MSC Pool Function Enabled to YES, and specify Length of NRI in TMSI and MSC NULL-NRI Value. Ensure that all these parameter values are the same as those configured on the MSC side. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select GSM CN Operator in the expanded BSC configuration tree.

Step 7 Add the mapping between an NRI and an MSC. Ensure that the NRI value is the same as that configured on the MSC side. Configuration method: Select an MSC under GSM in the Transport navigation tree on the left of the Planned area, and then select NRI-MSC Mapping in the expanded MSC configuration tree.

Verification steps

Step 8 MSC1 and MSC2 compose an MSC pool. Enable the TMSI reallocation function on the CN.

Step 9 Prepare two MSs, both of which are registered with the MSC pool.

Step 10 On the LMT, start the A interface message tracing in the directions of MSC1 and MSC2. In this step, set MSC DPC (Hex) to the DPC of the corresponding MSC, and Cell ID (cell1, cell2, … cell16) to the ID of the cell that the MS camps on.



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To enable an MS to initiate a location update at a specific MSC, run the BSC6900 MML command MOD GCNNODE to set the administrative states of all the other MSCs to UNAVAIL(Unavailable). After the location update, change the states of these MSCs to NORMAL again.

Step 13 When both MSC1 and MSC2 are normal, move the two MSs to a location area beyond the coverage area of the MSC pool, and use the MSs to respectively originate a call again. Observe the MSCs that the MSs camp on, and find that MS1 sets up the call on the MSC1 side and MS2 sets up the call on the MSC2 side and that the home MSCs of both MSs remain unchanged.

In the TMSI reallocation procedure, an MSC assigns the TMSI that contains NRI (configured by the CN) to an MS. With this information, the BSC6900 allocates the service to the corresponding MSC when the MS originates a call service. Note that the mapping between the NRI and the MSC on the BSC6900 side must be consistent with the one configured on the CN side. You can use the BSC6900 MML command ADD NRIMSCMAP to configure the mapping on the BSC6900 side.

----End


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GSM Feature Configuration 20 Configuring GSM/WCDMA Interoperability

8 Configuring GSM/WCDMA

Interoperability

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-114301 GSM/WCDMA Interoperability.


− The MS supports both the GSM and WCDMA/TD-SCDMA networks. It also supports bidirectional cell reselection and handovers between the GSM and the WCDMA systems.

− The base station subsystem (BSS) and the network subsystem (NSS) support bidirectional cell reselection and handovers between the GSM and the WCDMA systems. They also support GSM/WCDMA inter-RAT cell selection, cell resection, and location update. In addition, they support measurement control, handover decision, and handover signaling procedure during inter-RAT handovers.


None

License


Context

The configuration of GSM/WCDMA interoperability is restricted by the license.

The GSM/WCDMA interoperability feature enables an MS to be handed over to or reselect a GSM cell if the serving cell of the MS is not covered by the WCDMA/TD-SCDMA network or in an area with weak WCDMA/TD-SCDMA coverage. When a dual-mode MS enters the coverage of the WCDMA/TD-SCDMA network again, or the MS detects that the signal quality in the WCDMA/TD-SCDMA cell is higher than that in the serving GSM cell, the MS can be handed over to or reselect a WCDMA/TD-SCDMA cell if the handover or cell reselection conditions are met. Then, the MS can enjoy various services provided by the 3G mobile communication network.

The GSM/WCDMA interoperability feature applies to scenarios such as cell reselection and handovers between the GSM and WCDMA/TD-SCDMA systems, and interactions between


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14 Configuring GSM/WCDMA Interoperability GSM Feature Configuration

the GSM system and other 3G systems. This feature has no impact on services. The network elements (NEs) involved are the MS, BTS, BSC, MSC, PCU, SGSN, GGSN, and HLR.

Procedure

Configuration steps

Step 1 Add a 3G external cell. In this step, set Utran Cell Type to FDD. Configuration method: Right-click an NE node in the Main navigation tree on the left of the Planned area. In the pop-up menu, select GSM External Cell. Then in the sub-option, select BSC 3G External Cell. The interface for configuring 3G external cells is displayed on the right.

If you need to configure the GSM/TD-SCDMA interoperability feature, modify Utran Cell Type to TDD.

Step 2 Add a 3G neighboring cell. Configuration method: Right-click the cell and choose Neighboring Cell Configuration Express. Then in the interface for configuring neighboring cells, click BSC 3G Neighbor Cell. On the configuration interface on the right, you can add or delete 3G neighboring cells.

Step 3 Modify parameters related to neighboring cells. Configuration method: In the interface for configuring neighboring cells, right-click the added neighboring cell and choose Modify Ncell Relationship….

Step 4 Configure basic attributes of the BSC. In this step, set A Interface Tag to GSM_PHASE_2Plus. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select Basic Attributes of BSC in the expanded BSC configuration tree.

Step 5 Configure other software parameters of the BSC. In this step, set Support Sent 2QUATER to YES, Send 3G Class Flag to YES, and Classmark Enquiry With 3G Request to YES. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select Other Software Parameters under the Software Parameter Configuration node in the expanded BSC configuration tree.

Step 6 Configure call control basic parameters of the cell. In this step, set ECSC to YES. Configuration method: Right-click the cell and choose Cell Configuration Express to enable the Cell Configuration Express. Under the Call Control node in the configuration tree, set ECSC of Call Control Basic Parameters to YES.

Verification steps

Step 7 Run the MML command LST GEXT3GCELL to query the value of Utran Cell Type.

Expected result: The value of Utran Cell Type is FDD.

----End


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Issue 01 (2010-11-04)

GSM Feature Configuration 20 Configuring GSM/WCDMA Service Based Handover

9 Configuring GSM/WCDMA Service

Based Handover

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-114321 GSM/WCDMA Service Based Handover.



− The BSS and the NSS support the bidirectional cell reselection and handovers between the GSM and the WCDMA systems. They also support GSM/WCDMA inter-RAT cell selection, cell resection, and location update. In addition, they support measurement control, handover decision, and handover signaling procedure during inter-RAT handovers.


This feature depends on the feature GBFD-114301 GSM/WCDMA Interoperability, which is already configured.

License


Procedure

Configuration steps

Step 1 Configure basic handover parameters of the cell. In this step, set Inter-RAT Out BSC Handover Enable and Inter-RAT In BSC Handover Enable to YES. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > Handover Basic Parameters of Cell.

Step 2 Configure inter-RAT handover parameters. In this step, set Allow Inter-RAT Load HO in Access State to Service-based. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > Inter-RAT Handover Parameters.

Step 3 Configure the UTRAN FDD handover data. In this step, set Better 3G Cell HO Allowed to YES, Inter-rat HO Preference to Pre_3G_Cell, and RSCP Threshold for Better 3G Cell


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14 Configuring GSM/WCDMA Service Based Handover GSM Feature Configuration

HO and Ec/No Threshold for Better 3G Cell HO to 0. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > UTRAN FDD Handover Data.

If the value of Utran Cell Type of the added external 3G neighboring cell is TDD, you need to run the MML command SET GCELLHOUTRANFDD.

Step 4 Add a 3G neighboring cell. Configuration method: Right-click the added neighboring cell and choose Modify Ncell Relationship….

Step 5 Configure other software parameters. In this step, set Service Based Handover Switch to OPEN and Service Handover Reassign to YES. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area, and then select Other Software Parameters under the Software Parameter Configuration node in the expanded BSC configuration tree.

Verification steps

Step 6 Use an MS to access the 2G cell and then originate a call. After the call is originated normally, move the MS to the coverage area with strong 3G signals. Set Allow Inter-RAT Load HO in Access State to CnService-based(CN Service-based). On the CN side, set Service Handover to Handover to UTRAN or cdma2000 should be performed.

Step 7 On the LMT, trace the Base Station Subsystem Application Part (BSSAP) messages over the A interface.

Step 8 Expected result: The BSC sends a Handover Required message to the MSC with the handover cause value of better-cell.

----End


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GSM Feature Configuration 20 Configuring GSM/WCDMA Load Based Handover

10 Configuring GSM/WCDMA Load

Based Handover

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-114322 GSM/WCDMA Load Based Handover.



− The BSS and the NSS support bidirectional cell reselection and handovers between the GSM and the WCDMA systems. They also support GSM/WCDMA inter-RAT cell selection, cell resection, and location update. In addition, they support measurement control, handover decision, and handover signaling procedure during inter-RAT handovers.



License


Context

The MSC transparently transmits the load information of the WCDMA network to the BSC. Then, the BSC makes a decision on the inter-RAT handover based on its own load and the load in the WCDMA network. In addition, the BSC sends a handover request carrying its own load information to the WCDMA network for reference in the decision on the inter-RAT handover.

Procedure

Configuration steps

Step 1 Configure basic handover parameters of the cell. In this step, set Inter-RAT Out BSC Handover Enable and Inter-RAT In BSC Handover Enable to YES. Configuration


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14 Configuring GSM/WCDMA Load Based Handover GSM Feature Configuration

method: Right-click the cell and choose Cell Configuration Express > Handover Data > Handover Basic Parameters of Cell.

Step 2 Configure other software parameters. In this step, set CS 2G 3G Load Balance Delta Threshold according to actual requirements. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area to display the interface for configuring the BSC, and then choose BSC > Software Parameter Configuration > Other Software Parameters.

Step 3 Configure inter-RAT handover parameters. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > Inter-RAT Handover Parameters.

Step 4 Modify the 3G external cell. In this step, set Load handover Load Accept Threshold according to actual requirements. Configuration method: Right-click the concerned NE and then choose GSM External Cell > BSC 3G External Cell.

Step 5 Configure advanced handover parameters of the cell. In this step, set Load handover Load Accept Threshold according to actual requirements. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > Handover Advanced Data.

Verification steps

Step 6 Use an MS to access the 2G cell and then originate a call. After the call is originated normally, move the MS to the coverage area with strong 3G signals. Set Allow Inter-RAT Load HO in Access State to Load-based(Load-based). On the CN side, set Service Handover to Handover to UTRAN or cdma2000 should be performed.

Step 7 On the LMT, trace the BSSAP messages over the A interface.

Step 8 Expected result: The BSC sends a Handover Required message to the MSC with the handover cause value of traffic.

----End


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GSM Feature Configuration 20 Configuring 2G/3G Cell Reselection Based on MS State

11 Configuring 2G/3G Cell

Reselection Based on MS State

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-114323 2G/3G Cell Reselection Based on MS State.



− The BSS and the NSS support bidirectional cell reselection and handovers between the GSM and the WCDMA systems. They also support GSM/WCDMA inter-RAT cell selection, cell resection, and location update. In addition, they support measurement control, handover decision, and handover signaling procedure during inter-RAT handovers.



License


Procedure

Configuration steps

Step 1 Configure basic handover parameters of the cell. In this step, set Inter-RAT Cell Reselection Enable to YES. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > Handover Basic Parameters of Cell.

Step 2 Configure UTRAN system message parameters of the cell for call control. In this step, set Qsearch I, Qsearch C, and Qsearch P to 7, and Qsearch C Initial to Always. Configuration method: Right-click the cell and choose Cell Configuration Express > Handover Data > UTRAN System Message Parameters.


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14 Configuring 2G/3G Cell Reselection Based on MS State GSM Feature Configuration

Step 3 Optional: If Utran Cell Type is set to TDD, set the UTRAN system message parameters of the cell for call control. In this step, set TDD System Information Optimization Allowed to YES.

Verification steps

Step 4 Move the MS within a GSM cell or UMTS cell, and ensure that the Ec/No and the received signal code power (RSCP) of the common pilot channel (CPICH) are normal during the neighboring cell measurement of the UMTS cell (FDD). If the following conditions are met within five seconds, the MS will initiate a cell reselection from the GSM cell to the UMTS cell: CPICH RSCP > RLA_C + FDD Q Offset and CPICH Ec/No > FDD Qmin.

Step 5 When the MS is in the GSM cell, the frequency information of the MS indicates that the MS is in the GSM cell; when the MS is in the UMTS cell, the frequency information of the MS indicates that the MS is in the UMTS cell.

----End


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GSM Feature Configuration 20 Configuring Satellite Transmission

12 Configuring Satellite

Transmission

About This Chapter

For a breakthrough in terrain and distance restrictions, satellite transmission is configured for communication in remote mountain areas or on sparsely populated plains. Satellite transmission can satisfy the requirements of wide coverage, long transmission distance, and flexible link scheduling.

12.1 Configuring Satellite Transmission over Abis Interface

This section describes how to activate, verify, and deactivate the feature GBFD-113901 Satellite Transmission over Abis Interface.

Prerequisites Activation


Verification

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

Context

The configuration of satellite transmission over the Abis interface is restricted by the license.

With satellite transmission over the Abis interface, BTSs can be deployed in areas that are difficult to reach through terrestrial lines, thus solving the communication problem in those areas. Satellite transmission over the Abis interface has a longer delay in information exchange than terrestrial transmission.


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14 Configuring Satellite Transmission GSM Feature Configuration

In satellite transmission mode, the GPRS parameters of PS domain cells must be set as follows for normal PS services: T3168 to 2000ms, T3192 to 0ms, and maximum countdown number to 15.

Procedure

Configuration steps

Step 1 Configure the transmission mode of a BTS. In this step, set Transmission Mode to Satellite Transmission. Configuration method: Right-click the BTS and then choose BTS Configuration Express > BTS Basic Attributes > BTS Transfers Mode.

Step 2 Configure BTS clock parameters. The CME does not have this object. Equivalently, set the clock type of the BTS to INT_CLK. Configuration method: Right-click the BTS and then choose BTS Configuration Express > BTS Basic Attributes > SITE Clock Type.

Step 3 Optional: Set the LAPD window size of the BTS. In this step, set RSL LAPD Window Size according to the actual delay. Configuration method: Right-click the BTS and then choose BTS Configuration Express > BTS Basic Attributes > LAPD Window Size.

The default value of RSL LAPD Window Size is 48. You can set it according to the actual delay. A longer delay requires a larger value.

Step 4 Optional: Configure timer parameters of the cell for call control. In this step, set T200 SDCCH and T200 SDCCH SAPI3 to 200, and T200 SACCH SDCCH to 100. Configuration method: Right-click the cell and choose Cell Configuration Express > Call Control > Call Control Timer Parameter.

Step 5 Optional: Configure basic parameters of the cell for call control. In this step, set MS MAX Retrans as required. Configuration method: Right-click the cell and choose Cell Configuration Express > Call Control > Call Control Basic Parameters.

Modifying MS MAX Retrans to a larger value can increase the radio access rate and modifying MS MAX Retrans to a smaller value can reduce the load of the RACH and SDCCH.

Step 6 Optional: Configure basic PS attributes of a 2G cell. In this step, set T3168 to 2000ms, T3192 to 0ms, and BS_CV_MAX to 15. Configuration method: Right-click the cell and choose Cell Configuration Express > GPRS Attributes > Basic PS Attributes of 2G Cell.

Verification steps

Step 7 Run the MML command DSP GCELLSTAT to query the status of the cell.

Expect result: Cell Service State is set to YES.

Step 8 Use an MS to originate a call.

Step 9 Trace the CS domain messages on the Abis interface. In this step, set Trace Type to RSL.

Expected result: The complete signaling procedure of the mobile-originated call can be seen.

Step 10 Use the MS to perform the PING service after dial-up access. The service succeeds.

----End


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GSM Feature Configuration 20 Configuring Active Power Control

13 Configuring Active Power

Control

This chapter describes how to activate, verify, and deactivate the basic feature GBFD-117602 Active Power Control.

Prerequisites

None

Context

The Active Power Control feature enables a BSC to control the uplink and downlink power promptly after an MS successfully accesses the network or a handover is successfully performed in the BSC. In such a case, both the MS and the BTS transmit signals at a proper power. Thus, the problem of untimely power control is solved. With active power control, the system interference is decreased, the quality of service (QoS) is improved, and the power consumption of the MS or BTS is reduced.

Procedure

Configuration steps

Step 1 Configure basic parameters for power control of the cell. In this step, set Power Forecast Allowed to YES. Configuration method: Right-click the cell and choose Cell Configuration Express > Power Control > Power Control Basic Parameters.

Step 2 Configure basic parameters of the cell. In this step, set UL PC Allowed and DL PC Allowed to YES. Configuration method: Right-click the cell and choose Cell Configuration Express > Cell Attributes > Basic Attribute.

Verification steps

Step 3 Run the MML command SET GTRXCHANADMSTAT. In this step, specify the relevant channels, and then set Administrative State to Lock to block all TCHs on the BCCH TRX of cell 0 except SDCCHs.

Step 4 Trace the CS domain messages of a single subscriber in cell 0.


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14 Configuring Active Power Control GSM Feature Configuration

Step 5 Use an MS to make a call. Ensure that the level during the test is good, that is, the uplink and downlink level values in the measurement report are greater than -60 dBm.

Step 6 Observe the result of tracing the CS domain messages of a single subscriber in cell 0.

Step 7 Expected result: The call is successfully originated and the communication is normal. The TCH occupied by the call is on a non-BCCH TRX, and the Measurement Result message regarding the call exists before the Channel Activation message is delivered. In this case, the values of bs power and ms power in the Channel Activation message are not the maximum (the maximum power level of a 900 MHz cell is 5 and that of the 1800 MHz cell is 0).

----End


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Issue 01 (2010-11-04)

GSM Feature Configuration 20 Configuring Dynamic Adjustment Between FR and HR

14 Configuring Dynamic

Adjustment Between FR and HR

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-113402 Dynamic Adjustment Between FR and HR.


None


None

License


The cell is a non-concentric cell and works properly.

All the TCHs in the cell are full-rate (FR) channels.

The CN, cell, and MS support this feature.

Context

With this feature, FR channels and half-rate (HR) channels are dynamically converted to automatically adapt to the proportions of FR channels and HR channels in a cell during an actual call. In this manner, the situation in which channels of one type are congested whereas channels of the other type are idle can be prevented.

Procedure

Configuration steps

Step 1 Configure device attributes of TRXs. In this step, specify all the TRXs in the cell and set TCH Rate Adjust Allow to YES. Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXDEV > Site TRX Dev Property.

Verification steps

Step 2 Run the BSC6900 MML command SET GCELLCHMGAD. In this step, specify the relevant cell, and set TCH Traffic Busy Threshold to 0 to ensure that a new call is preferentially assigned to an HR TCH.


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14 Configuring Dynamic Adjustment Between FR and HR GSM Feature Configuration

Step 3 Use an MS to originate a call in the cell.

Expected result: The call is successfully originated and the communication is normal. A FR TCH is converted into two HR TCHs and occupied by the MS.

Step 4 Terminate the call.

Expected result: The HR TCHs are not converted into FR TCHs.

Step 5 Run the BSC6900 MML command SET GTRXCHANADMSTAT. In this step, specify all the FR TCHs in the cell and set Administrative State to Lock to block all the FR TCHs in the cell with only HR TCHs reserved.

Step 6 Run the BSC6900 MML command SET GCELLCHMGAD. In this step, specify the relevant cell, and set TCH Traffic Busy Threshold to 100 to ensure that a new call is preferentially assigned to an FR TCH.

Step 7 Use an MS to originate a call in the cell.

Expected result: The call is successfully originated and the communication is normal. The MS occupies an FR TCH.

In Step 6, if the MS and the called party camp on the same cell, you need to reserve an FR TCH to ensure the successful setup of the call.

----End


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Issue 01 (2010-11-04)

GSM Feature Configuration 20 Configuring Cell Broadcast

15 Configuring Cell Broadcast

About This Chapter

Through the cell broadcast service, mobile operators can broadcast specified short messages in the cells covered by one or more BTSs in a mobile network. All the MSs in the cells can receive the short messages.

15.1 Configuring Short Message Service Cell Broadcast (TS23)

This section describes how to activate, verify, and deactivate the feature GBFD-113601 Short Message Service Cell Broadcast (TS23).

15.2 Configuring Simplified Cell Broadcast

This section describes how to activate, verify, and deactivate the feature GBFD-113602 Simplified Cell Broadcast.

15.1 Configuring Short Message Service Cell Broadcast (TS23)

This section describes how to activate, verify, and deactivate the feature GBFD-113601 Short Message Service Cell Broadcast (TS23).


The XPUa/XPUb board is configured and works properly.

The Cell Broadcast Center (CBC) works properly.

Context

The Short Message Service Cell Broadcast is restricted by the license.

To enable this feature, you must install the hardware and software of the CBC and the corresponding networking equipment.


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14 Configuring Cell Broadcast GSM Feature Configuration

Procedure

Configuration steps

Step 1 Modify the attributes of a GSM operator. In this step, set Support Cell Broadcast to SPPRTSTANDARD. Configuration method: Choose BSC Configuration Express > BSC > BSC Basic Info > GSM CN Operator.

Step 2 Add VLAN attributes of the XPU board. In this step, set the VLAN attributes on the BSC connected to the CBC according to the IP address actually allocated. Configuration method: Right-click the concerned NE and choose Device Panel. Then right-click the XPU board and choose Property. On the interface for configuring board attributes, set XPUVLAN.

Step 3 Configure port attributes of the XPU board. In this step, set Panel Port Switch to OPEN. Configuration method: Right-click the concerned NE and choose Device Panel. Then right-click the XPU board and select Property. On the interface for configuring board attributes, set XPUPORT.

Step 4 Add a CBC address. In this step, set the CBC address related parameters. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area. In the interface for configuring BSC, choose BSC > BSC Basic Info > CBC Address.

Step 5 Configure channel attributes of TRXs. Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXCHAN > Channel Type.

Verification steps

Step 6 Run the MML command MOD GCNOPERATOR. In this step, set OPERATOR INDEX to the index of the operator whose cell is to be verified, Support Cell Broadcast to SPPRTSTANDARD(Support Standard CB).

Step 7 Run the MML command ADD XPUVLAN. In this step, set Subrack No., Slot No., and Subsystem No. to the subrack number, slot number, and subsystem number corresponding to the XPU board that manages the cell broadcast service, and set MAC Address to 0, IP Address to the actually allocated lab IP address, and Net Mask to 255.255.255.0.

Step 8 Run the MML command SET XPUPORT. In this step, set Subrack No., Slot No., and Port No. to those of the XPU board added through the ADD XPUVLAN command, and set Panel Port Switch to OPEN. Then insert an Ethernet cable into the port, and check that the IP address of this port can be pinged.

Step 9 Run the MML command ADD GCBSADDR. In this step, set CBC INDEX to 0 and OP INDEX SET to the index of the operator whose cell is to be verified. Set Subrack No., Slot No., and CPU NO to those of the XPU board added through the ADD XPUVLAN command. In addition, set BSC IP to the IP address of the XPU board added through the ADD XPUVLAN command. Set BSC Port to 5000, BSC GateWay IP to the gateway IP address of the lab, CBC IP to the IP address of the CBC, Mask to 255.255.255.0, CBC Port to 6000, and If CB Shake Hand to YES.

Step 10 Run the MML command SET GTRXCHAN. In this step, set TRX ID to the index of the BCCH TRX in the cell, Channel No. to 0, and Channel Type to BCCH_CBCH(BCCH+CBCH).

Step 11 Add the settings of the BSC, cell, area, channel, and user on the CBC side, and divide cells into different cell groups. Enable the BSC-CBC interface tracing function on the LMT when using an MS with the CBC function enabled to access the network in different cells, and check whether the CBCH Query and CBCH Query Response messages can be traced.


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GSM Feature Configuration 20 Configuring Cell Broadcast

Step 12 Add the message Select Channel 0 on the CBC side, and set the same channel on the MS side (the configuration procedure depends on the MS brand). Set the priority to Normal (1), number of broadcast services to 6, broadcast interval to 10s, coding scheme to English, content of the message to Happy new year. Send this message to the MSs in the cells. Then, enable the BSC-CBC tracing function and Abis interface tracing function on the LMT, and check whether the Write/Replace message and Report message are traced on the BSC-CBC trace window, whether the SMS Broadcast Command message is traced on the Abis interface, and whether the MS can receive the Happy new year message correctly.

----End

15.2 Configuring Simplified Cell BroadcastThis section describes how to activate, verify, and deactivate the feature GBFD-113602 Simplified Cell Broadcast.


The XPUa board is configured and works properly.

Context

The Simplified Cell Broadcast is restricted by the license.

This feature provides the simple cell broadcast service without the CBC system.

Procedure

Configuration steps

Step 1 Modify the attributes of a GSM operator. In this step, set Support Cell Broadcast to SPPRTSIMPLE(Support Simple CB). Configuration method: Choose BSC Configuration Express > BSC > BSC Basic Info > GSM CN Operator.

Step 2 Configure channel attributes of TRXs. Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXCHAN > Channel Type.

Step 3 Configure simple broadcast parameters of the cell. In this step, set Support Cell Broadcast Name to YES. Configuration method: Right-click the cell and choose Cell Configuration Express > Other Attributes > Simple Broadcast Parameter.

Step 4 Configure cell broadcast messages. The CME does not support the configuration of the Cell Broadcast Messages object. To add simplified cell broadcast messages, run the ADD GSMSCB command on the concerned NE.

Verification steps

Step 5 Run the MML command MOD GCNOPERATOR. In this step, set OPERATOR INDEX to the index of the operator whose cell is to be verified, Support Cell Broadcast to SPPRTSIMPLE(Support Simple CB).

Step 6 Run the MML command SET GTRXCHAN. In this step, set TRX ID to the index of the BCCH TRX in the cell, Channel No. to 0, and Channel Type to BCCH_CBCH(BCCH+CBCH).


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14 Configuring Cell Broadcast GSM Feature Configuration

Step 7 Run the MML command SET GCELLSBC. In this step, set Cell Index to the index of the cell to be verified, Support Cell Broadcast Name to YES, Chan ID to 0, and Broadcast Content to Welcome. Create an Abis interface signaling tracing task on the LMT. Set the same channel (channel 0) on the MS side as that on the CBC side (the setting procedure depends on the MS brand), and then check whether the SMS Broadcast Command message can be traced over the Abis interface and whether the MS can receive the Welcome message correctly.

Step 8 Run the MML command SET GCELLSBC. In this step, set Cell Index to the index of the cell to be verified, and set Support Cell Broadcast Name to NO. Create an Abis interface signaling tracing task on the LMT, and check that the SMS Broadcast Command message cannot be traced over the Abis interface.

Step 9 Run the MML command ADD GSMSCB. In this step, set Cell Index List to the index of the cell to be verified, Geography Scope to LAC_CI(CELL IMME), Code to 1, Update to 0, Chan ID to 0, Coding Scheme to ENGLISH, Content of Message to Better City Better Life, Repeat to 60, and Broadcast Interval to 60. Specify Start Time and End Time. Create an Abis interface signaling tracing task on the LMT, and set the same channel (channel 0) on the MS side as that on the CBC side (the setting procedure depends on the MS brand). Check that the SMS Broadcast Command message is traced over the Abis interface and that the MS receives the Better City Better Life message correctly.

Start Time set through the ADD GSMSCB command must be later than the real time of the OMU.

To ensure that the simple broadcast message can be transmitted for 60 times, the interval from Start Time to End Time must be greater than one hour.

----End


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GSM Feature Configuration 20 Configuring Voice Quality Index (Uplink VQI)

16 Configuring Voice Quality Index

(Uplink VQI)

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-116801 Voice Quality Index.

Prerequisites Configuration

The BTS that controls the cell supports the downlink voice quality index (VQI) function.

Verification

− Report Downlink VQI Allowed for the cell to be verified is set to ENABLE, and Measurement Report Type in the UTRAN system message for call control of the cell to ComMeasReport(Common Measurement Report) for voice service tests.

− Measurement Report Type for the cell to be verified is set to EnhMeasReport(Enhanced Measurement Report) and different voice versions are set for voice service tests.

− MR.Preprocessing for the cell to be verified is set to BTS_Preprocessing for voice service tests.

Context

The downlink VQI function and the relevant traffic statistics counters help learn and determine the voice quality of a network. The VQI function applies to the downlink of all networks. After the downlink VQI function is enabled, the preceding counters must be included in overall evaluation of the downlink voice quality.

Procedure

Configuration steps

Step 1 Configure software parameters of the cell. In this step, set Report Downlink VQI Allowed to ENABLE. Configuration method: Right-click the cell and choose Cell Configuration Express > Other Attributes > Software Parameter.


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14 Configuring Voice Quality Index (Uplink VQI) GSM Feature Configuration

VQI data can be recorded in a measurement report during a voice service after Report Downlink VQI Allowed is set to ENABLE. If an MS does not support enhanced measurement reports or Measurement Report Type is not set to EnhMeasReport(Enhanced Measurement Report), the downlink VQI value is 255.

Verification steps

Step 2 Run the MML command SET GCELLSOFT. In this step, set Cell Index to the index of the cell to be verified, and Report Downlink VQI Allowed to ENABLE. Perform a voice service test, and check whether the downlink VQI value in the measurement report is 255 (an invalid value).

Step 3 Run the MML command SET GCELLCCUTRANSYS. In this step, set Cell Index to the index of the cell to be verified, and Measurement Report Type to EnhMeasReport(Enhanced Measurement Report).

If no enhanced measurement report is obtained during a voice service when an MS supports enhance measurement reports, you need to configure a 2G neighboring cell.

Step 4 Run the BSC6900 MML command SET GCELLCCACCESS. In this step, set Speech Version to one that matches the channel type. Speech versions include FULL_RATE_VER1(Full-rate VER 1), FULL_RATE_VER2(Full-rate VER 2), FFULL_RATE_VER3(Full-rate VER 3), HALF_RATE_VER1(Half-rate VER 1), HALF_RATE_VER2(Half-rate VER 2), and HALF_RATE_VER3(Half-rate VER 3). Perform a voice service test, and check whether the downlink VQI value in the measurement report is a valid value.

Step 5 Run the BSC6900 MML command SET GCELLHOCTRL. In this step, set MR.Preprocessing to BTS_Preprocessing(BTS preprocessing) and set Sent Freq.of preprocessed MR based on site requirements. Perform a voice service test, and check the downlink VQI value in the preprocessing measurement report.

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GSM Feature Configuration20 Configuring Dynamic Adjustment of Uplink MCS

Coding

17 Configuring Dynamic

Adjustment of Uplink MCS Coding

This chapter describes how to activate, verify, and deactivate the basic feature GBFD-119204 Dynamical Adjustment of Uplink MCS Coding.

Prerequisites

The cell is configured with the enhanced general packet radio service (EGPRS), and the uplink coding scheme of the cell can be changed.

Context

With this feature, the BSC dynamically adjusts the coding scheme adopted by the PDCH based on the uplink measurement report from the BTS. In this manner, the PDCH coding scheme can dynamically vary with the changes of the radio transmission quality of the MS that occupies the PDCH, thus implementing dynamic adjustment of the uplink MCS coding to quickly adapt to the quality changes of air interfaces. As a result, the uplink throughput is increased.

Procedure

Configuration steps

Step 1 Configure EGPRS parameters of the 2G cell. In this step, set Support EGPRS Uplink MCS Dynamic Adjust to According to uplink quality measurements reported by BTS. Configuration method: Right-click the cell and choose Cell Configuration Express > GPRS Attributes > EGPRS Parameters of 2G Cell.

Verification steps

Step 2 Lead downlink BTS signals into a shielding cabinet.

Step 3 Combine the uplink signals and interference source signals in the shielding cabinet and then lead the combined signals to the receive end of a TRX.

Step 4 Set the frequency of the interference source to the uplink frequency of the TRX, set the transmit power, and then put an MS in the shielding cabinet.

Step 5 Use the MS to upload files through FTP.


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14 Configuring Dynamic Adjustment of Uplink MCS Coding GSM Feature Configuration

Step 6 Trace the result of adjusting the uplink coding scheme through the PS Um interface.

Expected result:

When the power of the interference source increases, the rate of the uplink EGPRS coding scheme decreases.

The power of the interference source cannot be too great. Otherwise, the PS services may be interrupted.

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GSM Feature Configuration 20 Configuring Packet Channel Dispatching

18 Configuring Packet Channel

Dispatching

About This Chapter

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-119302 Packet Channel Dispatching.

Prerequisites The PCU type is set to built-in PCU.

The cell supports the EGPRS service.

One GSM MS supporting only voice services is available.

One GPRS MS supporting only the GPRS service is available.

Context The GPRS service uses only the GMSK modulation scheme whereas the EGPRS service

can use the GMSK and 8PSK modulation schemes. When EGPRS downlink services and GPRS uplink services use the same packet channel, the EGPRS downlink data blocks with the USF may be used to schedule the GPRS uplink services. In this case, the EGPRS downlink data blocks can use only the GMSK modulation scheme. This greatly affects the downlink throughput of the EGPRS MS. With this feature, the operator can separate the EGPRS service from the GPRS service, thus effectively increasing the downlink throughput of the EGPRS MS.

This feature reduces the probability that the EGPRS service and the GPRS service use the same channel, thus increasing the EGPRS service rate, improving the entire network performance, and enhancing the user experience.

18.1 Configuring the Feature of EGPRS Special Channel Be Used by Only EGPRS Service

This section describes how to activate, verify, and deactivate the feature EGPRS Special Channel Be Used by Only EGPRS Service.

18.2 Configuring the Feature of EGPRS Preferred Channel


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14 Configuring Packet Channel Dispatching GSM Feature Configuration

This section describes how to activate, verify, and deactivate the feature EGPRS Preferred Channel.

18.3 Configuring the Feature of Channel Multiplexing in the E Down G Up Scenario

This section describes how to activate, verify, and deactivate the feature Channel Multiplexing in the E Down G Up Scenario.

18.1 Configuring the Feature of EGPRS Special Channel Be Used by Only EGPRS Service

This section describes how to activate, verify, and deactivate the feature EGPRS Special Channel Be Used by Only EGPRS Service.

Procedure

Configuration steps

Step 1 Configure an EGPRS TRX for the cell.

Step 2 Set basic GPRS Attributes of the 2G cell. In this step, set GPRS to Support as built-in PCU and EDGE to YES to enable the EGPRS function. Configuration method: Right-click the cell and choose Cell Configuration Express > Cell Attributes > Basic GPRS Attributes of 2G Cell.

Step 3 Configure channel attributes of TRXs. In this step, set Channel Type and PDCH Channel Priority Type. Expected result: The values of Channel Type of six channels are TCHFR(TCH Full Rate), and the values of PDCH Channel Priority Type are EGPRSSPECH(EGPRS Special Channel). Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXCHAN > Channel Type.

Step 4 Set Channel Type to PDTCH and PDCH Channel Priority Type to EGPRSSPECH(EGPRS Special Channel).

Verification steps

An MS (GSM MS) that supports only voice services and an MS (GPRS MS) that supports only the GPRS service are available.

Step 5 Monitor the channels occupied by the MSs.

Step 6 Use the GSM MS to make a voice call in the cell.

Step 7 Attach the GPRS MS to the GPRS network and initiate the PDP activation.

Expected result:

The GSM MS fails to make a voice call in the cell.

The GPRS MS fails to be attached to the GPRS network and the PDP activation fails.

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18.2 Configuring the Feature of EGPRS Preferred Channel

This section describes how to activate, verify, and deactivate the feature EGPRS Preferred Channel.

Procedure

Configuration steps

Step 1 Configure two EGPRS TRXs for the cell.

Step 2 Do not enable the EGPRS function for the BCCH TRX. Set basic GPRS attributes of the 2G cell for the other TRX. That is, set GPRS to Support as built-in PCU and EDGE to YES to enable the EGPRS function. Configuration method: Right-click the cell and choose Cell Configuration Express > Cell Attributes > Basic GPRS Attributes of 2G Cell.

Step 3 Set channel management status. This step uses a non-configuration command that the CME does not support. Run the MML command SET GTRXCHANADMSTAT on the BSC. In this step, set TRX ID to the index of the BCCH TRX, and set Channel No. and Administrative State.

Step 4 Expected result: The values of all Administrative State for all the TCHs on the BCCH TRX are Lock.

Step 5 Configure channel attributes of TRXs. In this step, set Channel Type and PDCH Channel Priority Type.

Expected result: The values of Channel Type are TCHFR(TCH Full Rate). The values of PDCH Channel Priority Type of four channels are EGPRSPRICH(EGPRS Priority Channel) and those of the other four channels are GPRS(GPRS Channel). Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXCHAN > Channel Type.

Verification steps

GPRS MS1 (class10), GPRS MS2 (class10), and EGPRS MS1 (class10) are attached to the GPRS cell.

Step 6 Record the process of configuring channels for the devices.

Step 7 EGPRS MS1 activates the PDP and starts the DL FTP.

Step 8 GPRS MS1 activates the PDP and starts the DL FTP.

Step 9 GPRS MS2 activates the PDP and starts the DL FTP.

Step 10 EGPRS MS1 stops the DL FTP and releases the PDCH.

Step 11 EGPRS MS1 starts the DL FTP again after a period of time.

Step 12 Use a drive test tool to record the channels occupied by the MSs.

Verification results

After activating the PDP for the first time, EGPRS MS1 starts the DL FTP and uses an EGPRS preferred channel.


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14 Configuring Packet Channel Dispatching GSM Feature Configuration

After starting the DL FTP, GPRS MS2 shares a PDCH with GPRS MS1. The system does not allocate an EGPRS preferred channel to GPRS MS2.

After EGPRS MS1 stops the DL FTP and releases the PDCH, GPRS MS2 or GPRS MS1 is switched to the correct channel instead of sharing a PDCH. The correct channel is the EGPRS preferred channel used by EGPRS MS1.

After EGPRS MS1 starts the DL FTP again, GPRS MS2 or GPRS MS1 is switched out of the EGPRS preferred channel, and then the two GPRS MSs share a PDCH again.

The EGPRS preferred channel is allocated again to EGPRS MS1, which starts the DL FTP on the EGPRS preferred channel.

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18.3 Configuring the Feature of Channel Multiplexing in the E Down G Up Scenario

This section describes how to activate, verify, and deactivate the feature Channel Multiplexing in the E Down G Up Scenario.

Procedure

Configuration steps

Step 1 Configure an EGPRS TRX for the cell.

Step 2 Configure channel attributes of TRXs. In this step, set Channel Type and PDCH Channel Priority Type. Expected result: The values of Channel Type of all the channels are TCHFR(TCH Full Rate), and the values of PDCH Channel Priority Type of at least two of the channels are EGPRSNORCH(EGPRS Normal Channel). Configuration method: Right-click a TRX and then choose TRX Configuration Express > GTRXCHAN > Channel Type.

Step 3 Configure PS software parameters. In this step, set Allow E Down G Up Switch to Close. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area. Then in the displayed interface for configuring the BSC, choose BSC > BSC Basic Info > PS Software Parameter.

Verification steps

Two GPRS MSs (class8) and one EGPRS MS (class10) are available.

Step 4 Attach GPRS MS1 to the GPRS network and initiate the PDP activation. GPRS MS1 starts the UL FTP and uses one uplink channel. The downlink channels are not used.

Step 5 Attach EGPRS MS1 to the EGPRS network and initiate the PDP activation. EGPRS MS1 starts the DL FTP and does not share a channel with GPRS MS1.

Step 6 Attach GPRS MS2 to the EGPRS network and initiate the PDP activation. GPRS MS2 starts the UL FTP and shares an uplink channel with GPRS MS1.

Step 7 Record the channels occupied by each MS.

Expected results


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After EGPRS MS1 accesses the cell and starts the DL FTP, the uplink channel of GPRS MS1 does not share the same channel with the downlink channel of EGPRS MS1.

After GPRS MS2 accesses the cell and starts the DL FTP, the uplink channel of GPRS MS2 does not share the same channel with the downlink channel of EGPRS MS1.

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GSM Feature Configuration 20 Configuring Guaranteed Emergency Call

19 Configuring Guaranteed

Emergency Call

This chapter describes how to activate, verify, and deactivate the optional feature GBFD-110521 Guaranteed Emergency Call.


None


None

License


Context

The Guaranteed Emergency Call feature is introduced to maximize the setup success rate of emergency calls, thus ensuring the communication in disaster relief activities.

This feature has the following characteristics:

Emergency calls are preferentially assigned to full rate TCHs (TCH/Fs) in the immediate assignment phase.

The system reserves TCH/Fs for the MSs making emergency calls.

The MS making an emergency call preempts the channel resources seized by the call with a lower priority.

Procedure

Configuration steps

Step 1 Configure advanced parameters of the cell for call control. In this step, set Priority of Emergency Call to a proper value according to actual requirements, for example, 1. Configuration method: Right-click the cell and choose Cell Configuration Express > Call Control > Callctrl Advanced Parameters.


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14 Configuring Guaranteed Emergency Call GSM Feature Configuration

Step 2 Configure basic channel management parameters of the cell. In this step, set Max Channel Num Reserved for EC to a proper value according to actual requirements, for example, 2. Configuration method: Right-click the cell and choose Cell Configuration Express > Channel Management > Channel Management Basic Parameters.

Step 3 Configure advanced parameters of the cell for call control. In this step, set Emergency Call Preemption Permitted to ON. Configuration method: Right-click the cell and choose Cell Configuration Express > Call Control > Callctrl Advanced Parameters.

Step 4 Optional: Configure timer parameters of the cell. In this step, set Timer of Reserved TCH for EMC to a proper value according to actual requirements, for example, 15. Configuration method: Right-click the cell and choose Cell Configuration Express > Other Attributes > Timer Parameters.

Verification steps

Step 5 Run the BSC6900 MML command LST GCELLCCAD to check the value of Priority of Emergency Call.

Expected result: The value of Priority of Emergency Call is 1.

Step 6 Run the BSC6900 MML command LST GCELLCHMGBASIC to check the value of Max Channel Num Reserved for EC.

Expected result: The value of Max Channel Num Reserved for EC is 2.

Step 7 Run the BSC6900 MML command LST GCELLCCAD to check the value of Emergency Call Preemption Permitted.

Expected result: The value of Emergency Call Preemption Permitted is ON.

Step 8 Optional: Run the BSC6900 MML command LST GCELLTMR to view the value of Timer of Reserved TCH for EMC.

Expected result: The value of Timer of Reserved TCH for EMC is 15.

Step 9 Use MS1 to make an emergency call in the cell.

Step 10 All the TCHs in the cell are occupied by common calls and no idle channel is available. An existing call has a lower priority than the emergency call and the channel resources of the call can be preempted.

Expected result: A call in the cell is released because its resources are preempted.

Step 11 MS1 makes the emergency call successfully. In the immediate assignment phase, an SDCCH is assigned and in the assignment phase, a TCH/F is assigned.

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GSM Feature Configuration 20 Configuring Abis over IP

20 Configuring Abis over IP

This chapter describes how to configure and verify the feature GBFD-118601 Abis over IP.


The FG2a, FG2c, GOUa, GOUc, PEUa, or POUc board is in position.

The BSC supports communication through device IP or port IP addresses.

The BTS supports transmission over IP.

When device IP addresses are used for communication, the opposite device must be configured with a static route to the device IP address of the BSC even if the BSC is directly connected to the opposite device. There is no such a requirement for the communication through IP addresses of ports.

The A, Abis, or Gb IP interface board can be configured with 16 device IP addresses.

Abis over IP does not support the HubBTSs and TDM/IP line sharing transmission but supports only the built-in PCU and star networking of the BTS.

Abis over IP supports only IPv4.

When the layer 2 networking is used on the Abis interface, the BSC and BTS automatically perform the bidirectional forwarding detection (BFD) on links. In this case, the BTS is not allowed to use device IP addresses for communication.

The feature GBFD-117801 Ring Topology, GBFD-117701 BSC Local Switch, or GBFD-117301 Flex Abis is not configured in the transmission network.

Context

The BTS3006C and BTS3002E do not support Abis over IP.

The Abis over IP feature is restricted by the license.

With this feature enabled, the BSC can be optionally configured with the Abis MUX function, which is used to improve the transmission efficiency on the Abis interface and to save the bandwidth.

Procedure

Configuring Abis over IP


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14 Configuring Abis over IP GSM Feature Configuration

Step 1 Configure IP over FE/GE.

1. Add a board. In this step, add an FG2a, FG2c, GOUa, or GOUc board on the BSC side. Configuration method: Right-click an NE in the Planned area and select Device Panel to display the device panel. Right-click a slot on the device panel, and in the pop-up menu, select INT. Then select the board type to be added.

2. Configure the data of the physical layer and the data link layer on the FG2a, FG2c, GOUa, or GOUc board.

3. Add an adjacent node. Configuration method: Choose BSC Configuration Express > Abis > Abis Interface Over IP > Adjacent Node.

4. Add an IP path. In this step, configure the data of IP user plane. Configuration method: Choose BSC Configuration Express > Abis > Abis Interface Over IP > IP Path.

5. Add a BTS board. That is, add an IP transmission board to the BTS. Configuration method: Right-click the BTS and then choose Device Panel.

This step is performed only when the BTS is a double-density BTS.

6. Configure the IP clock server of the BTS. Configuration method: Choose BTS Configuration Express > BTS Transmission Link > BTS IP Clock Server.

7. Add a serial number of the BTS equipment. Configuration method: Choose BTS Configuration Express > BTS Transmission Link > BTS Equipment Serial Number.

8. Set IP BTS Communication Address. In this step, set Peer BSC IP to the device IP address or Ethernet port IP address of the IP interface board on the BSC side, and set the IP address of the BTS. Configuration method: Choose BTS Configuration Express > BTS Transmission Link > IP BTS Communication Address.

In the case of layer 3 networking, if the BSC6900 and the BTS are not in the same network segment, you need to run the MML command ADD IPRT to add an IP route on the BTS side.

9. Configure Ethernet Port of IP BTS. That is, set the port IP address of the BTS. Configuration method: Choose BTS Configuration Express > BTS Transmission Link > Ethernet Port of IP BTS.

Step 2 Configure IP over E1/T1.

1. Add a board. In this step, add an PEUa or POUc board on the BSC side.

2. Configure the data of the physical layer and the data link layer.

− Configure the data of the physical layer and the data link layer on the PEUa board.

− Configure the data of the physical layer and the data link layer on the POUc board.

3. Add an adjacent node.

4. Add an IP path. In this step, configure the data of IP user plane.

5. Add a BTS board. That is, add an IP transmission board to the BTS.

This step is performed only when the BTS is a double-density BTS.

6. Add BTS connections. In this step, add the connection between a BTS and a BSC6900, and connection between BTSs including connections in a BTS, or connection between a BTS and a DXX. Configuration method: Right-click a BTS under the BSC node and choose BTS Topology. Then right-click on the displayed BTS Top interface and choose Chain Management….

7. Add a serial number of the BTS equipment.


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GSM Feature Configuration 20 Configuring Abis over IP

8. Set IP BTS Communication Address. In this step, set Peer BSC IP to the device IP address or Ethernet port IP address of the IP interface board on the BSC side.

9. Optional: Set IP MUX Pipe. In this step, set IP MUX Type to ABISMUX, and add Abis MUX. Configuration method: Select a BSC under GSM in the Transport navigation tree on the left of the Planned area to display the interface for configuring the BSC, and then choose BSC > Transmission Configuration > IP MUX Pipe.

Verifying Abis over IP

Step 3 Verify the data of the physical layer and the data link layer.

IP over FE/GE

Step 4 Run the MML command DSP ETHPORT. In this step, set Subrack No., Slot No., and Port No. to those of the interface board where the port connected to the BTS is located. Check the values of Port state and Link Availability Status in the command execution result. If the value of Port state is Activated and that of Link Availability Status is Available, the link is normal.

Step 5 If the link aggregation mode is used, run the MML command DSP ETHTRK to query the setting of Status of ETHTRK. If the value of Status of ETHTRK is UP, it indicates that the link aggregation group works properly. Run the MML command DSP ETHTRKLNK to query the setting of Status of ETHTRKLNK sub-port. If the value of Status of ETHTRKLNK sub-port is UP, it indicates that the sub-port for the link aggregation group works properly.

Step 6 Run the BSC6900 MML command DSP ADJNODE to query the status of an adjacent node, number of paths to the adjacent node, and available bandwidth. You can check the value of Operation state and bandwidths. If the value of Operation state is Available and the available bandwidth is greater than 0, it indicates that the adjacent node is normal.

Step 7 Run the MML command DSP IPPATH to check whether the IP path is available. If the value of Operation state is Available and the available bandwidth is greater than 0, it indicates that the IP path is normal.

IP over E1/T1

Step 8 Run the BSC6900 MML command DSP E1T1 to check whether the port is functional by querying Port running state.

Step 9 If the PPP link is used, run the BSC6900 MML command DSP PPPLNK to query the settings of Link state, Local IP address, and Peer IP address.

Step 10 If the MLPPP link is used, run the BSC6900 MML command DSP MPGRP to query the settings of Link state, Local IP address, and Peer IP address, and run the BSC6900 MML command DSP MPLNK to query the settings of Link state and LCP negotiated state.

Step 11 If the PPP link is used, run the BSC6900 MML command PING IP. In this step, set Source IP address to the same value as Local IP address in the DSP PPPLNK command and Destination IP address to the same value as Peer IP address in the DSP PPPLNK command. If the statistics on PING packets can be received, the PPP link is normal.

Step 12 If the MLPPP link is used, run the BSC6900 MML command PING IP. In this step, set Source IP address to the same value as Local IP address in the DSP MPGRP command and Destination IP address to the same value as Peer IP address in the DSP MPGRP command. If the statistics on PING packets can be received, the MLPPP link is normal.

Step 13 Verify the control plane on the Abis interface.


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14 Configuring Abis over IP GSM Feature Configuration

Step 14 Run the BSC6900 MML command DSP LAPDLNK to check the LAPD link. If UsageStatus is Normal, the LAPD link is normal.

Step 15 Verify the user plane on the Abis interface.

Step 16 Run the BSC6900 MML command DSP ADJNODE to query the status of an adjacent node, number of paths to the adjacent node, and available bandwidth. You can check the value of Operation state and bandwidths. If the value of Operation state is Available and the available bandwidth is greater than 0, it indicates that the adjacent node is normal.

Step 17 Run the MML command DSP IPPATH to check whether the IP path is available. If the value of Operation state is Available and the available bandwidth is greater than 0, it indicates that the IP path is normal.

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GSM Feature Configuration

Documents

disaster recovery backup

main navigation tree

transport navigation tree

lapd window size

dsp mpgrp command

dsp ppplnk command

simplify frequency planning

handover signaling procedure