SingleRAN
Configuration Management Feature Parameter Description Issue
01
Date
2014-04-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2014. 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 mentioned in this document are the property of of their respective respective holders. 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 document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, 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 recommendations in this document do not constitute a warranty of any kind, express or implied.
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Website:
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Email:
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Contents
Contents 1 About This Document..................................................................................................................1 1.1 Scope..............................................................................................................................................................................1 1.2 Intended Audience..........................................................................................................................................................1 1.3 Change History...............................................................................................................................................................2 1.4 Differences Between Base Station Types.......................................................................................................................3
2 Overview.........................................................................................................................................4 3 Structure..........................................................................................................................................5 3.1 NE Configuration...........................................................................................................................................................7 3.1.1 Southbound Interface Overview..................................................................................................................................7 3.1.2 EMS Layer Description...............................................................................................................................................8 3.2 Subnet Configuration Management................................................................................................................................8 3.2.1 Softwar e System Structure..........................................................................................................................................8 3.2.2 Functions.....................................................................................................................................................................9 3.2.3 Configuration Data Flow...........................................................................................................................................10 3.2.4 Northbound Interface.................................................................................................................................................12 3.2.5 Typical Application Scenarios...................................................................................................................................14 3.2.6 Configuration Flow Example....................................................................................................................................18
4 Configuration Security...............................................................................................................20 5 Parameters.....................................................................................................................................21 6 Counters........................................................................................................................................22 7 Glossary.........................................................................................................................................23 8 Reference Documents.................................................................................................................24
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1 About This Document
1
About This Document
1.1 Scope This document describes configuration management, including its implementation rules and structure. This document covers the following features: l
MRFD-210301 Configuration Management
l
LBFD-004007 Configuration Management
l
TDLBFD-004007 Configuration Management
In this document, the following naming conventions apply for LTE terms.
Includes FDD and TDD
Includes FDD Only
Includes TDD Only
LTE
LTE FDD
LTE TDD
eNodeB
LTE FDD eNodeB
LTE TDD eNodeB
eRAN
LTE FDD eRAN
LTE TDD eRAN
In addition, the "L" and "T" in RAT acronyms refer to LTE FDD and LTE TDD, respectively.
1.2 Intended Audience This document is intended for personnel who: l l
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Need to understand the features described herein Work with Huawei products
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1 About This Document
1.3 Change History This section provides information about the changes in different document versions. There are two types of changes, which are defined as follows: l
Feature change Changes in features of a specific product version
l
Editorial change Changes in wording or addition of information that was not described in the earlier version
SRAN9.0 01 (2014-04-30) This issue does not include any changes.
SRAN9.0 Draft B (2014-02-28) This issue includes the following changes.
Change Type
Change Description
Parameter Change
Feature change
None
None
Editorial change
Added chapter 4 Configuration Security.
None
For details about feature support and function implementation differences between base station types, see section 1.4 Differences Between Base Station Types.
SRAN9.0 Draft A (2014-01-20) Compared with Issue 01 (2013-09-30) of SRAN8.0, Draft A (2014-01-20) of SRAN9.0 includes the following changes.
Change Type
Change Description
Parameter Change
Feature change
Huawei mobile network management system M2000 is renamed U2000.
None
Added the LTE TDD mode support the Configuration Management feature. Editorial change
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Deleted the descriptions of micro base stations' support for Configuration Management.
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None
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1 About This Document
1.4 Differences Between Base Station Types Feature Support by Macro, Micro, and LampSite Base Stations None
Function Implementation in Macro, Micro, and LampSite Base Stations Working in either UMTS only or LTE FDD only mode, micro base stations do not support GSM, LTE TDD, multimode, co-MPT, or separate-MPT scenarios. As integrated entities, micro base stations do not involve such concepts as boards, cabinets, subracks, slots, or RRUs.
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2 Overview
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Overview
Configuration management allows you to configure network resources by using configuration data in network devices. This controls the running status of network devices. You can configure network resources, and monitor and control configuration parameters for network devices. This is to ensure that telecom operators can provide effective network operation and maintenance (O&M). Configuration management is required on the entire network O&M cycle. l
l
During network deployment, configuration management allows you to initialize configuration data, and install and set up network devices. During network adjustment and optimization, configuration management allows you to configure parameters for new features, and modify parameter settings for scenarios such as network capacity expansion, transmission adjustment, and wireless network performance optimization. For example, add, delete, or modify network parameters to maintain the quality of service (QoS) of a network during network optimization. You can modify parameters for an NE or for the entire network.
l
During routine O&M, configuration management allows you to monitor and modify network parameters.
Before you add, delete, or modify a parameter, ensure that your operation will have minimal impact on services. To achieve this, configuration management provides the following capabilities: l
Security management Configuration management allows you to control access permission to network resources.
l
Data validity check Configuration management allows you to add, delete or modify a parameter under constraints on logical data, to ensure that the parameter is correct and valid. In an end-toend configuration data scheme, ensure data integrity and consistency when you modify network parameters.
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3 Structure
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Structure
Radio access networks (RANs) are divided into three layers: NE layer (NEL), element management layer (EML), and network management layer (NML). Accordingly, SingleRAN configuration management has three layers: NE configuration, subnet configuration management, and network configuration management. l
NE configuration Huawei provides various clients that support man-machine language (MML) interfaces, including the web-based LMT (Web LMT) and MML command-line interface integrated with the U2000. Such clients allow you to run MML scripts to fine-tune NE configuration parameters. You can also modify NE configuration parameters on the Configuration Management Express (CME) through the southbound interface.
l
Subnet configuration management Huawei provides the CME, a professional configuration solution used to perform EMSlayer configuration management. The CME helps you centrally manage a SingleRAN network. The CME provides scenario-based templates and foolproof wizards, which allow you to efficiently migrate base stations, adjust networks, and check for consistency between parameter settings. The CME is recommended for configuration operations rather than Web LMT.
l
Network configuration management NMS-layer configuration management is a configuration solution for the entire network. The northbound interface allows EMSs from different vendors to be connected to the telecom operator's NMS. Huawei CME is connected to the NMS through the northbound interface. The telecom operator usually has a comprehensive evaluation system in the NMS for parameter planning. After the planning system determines the parameters to be optimized, you can send the modified parameter information to the CME t hrough the northbound interface. The CME then modifies the parameters for NEs. This greatly improves end-to-end O&M efficiency and reduces the operating expense (OPEX). Figure 3-1 shows the configuration management structure.
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Figure 3-1 Configuration management structure
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3.1 NE Configuration 3.1.1 Southbound Interface Overview The CME is connected to NEs through a southbound interface, which is a private interface. After generating configuration scripts, the CME sends these configuration scripts to NEs through the southbound interface. Configuration scripts take effect on NEs and configuration data is modified. The southbound interface supports two configuration script formats: MML and XML. The configur ation capability of the southbound interface is determined by that of NEs. Figure 3-2 shows how an NE processes a configuration script. Figure 3-2 NE processing a configuration script
Step 1 The script parser in the configuration management module parses the script and performs database operations according to the instructions in the script, as shown in steps 1 and 2 of Figure 3-2.
Step 2 The configur ation management module starts the data validity check, as shown in step 3 of Figure 3-2 l
If the data validity check fails, the configuration management module rolls the data back by using the database transaction control mechanism and stops data processing.
l
If the data validity check succeeds, the configuration management module instructs the application module, such as the NodeB Application Part (NBAP) or Radio Resources (RR), to change the data. The application module adjusts services according to data changes. Then,
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the application module sends the processed result to the configuration management module, as shown in steps 4 and 5 of Figure 3-2.
Step 3 The configuration management module creates a script execution report according to the processed result sent by the application module and sends the report to the EMS layer through the southbound interface, as shown in step 6 of Figure 3-2. ----End NOTE
In normal cases, an NE processing system is designed on a module basis. Therefore, the configuration management module and application processing module may be located in different boards or modules. These two modules interact by using the lower-layer communication mechanism.
3.1.2 EMS Layer Description The EMS layer includes the Web LMT, U2000, and CME. Their configuration capabilities are as follows: l
The Web LMT is a configuration tool for a single NE. Users can issue a single or multiple MML commands on the Web LMT to configure the NE.
l
The U2000 client integrates the Web LMT functions.
l
The CME allows users to concurrently configure multiple NEs. As a configuration tool on the EMS layer, the CME configures NE data through the southbound interface. Configuration parameters on NEs can be modified at the same time. You are advised to use the CME to configure data. NOTE
MML interfaces are located on the NE layer. Therefore, the configuration commands sent by a client (Web LMT, U2000, or CME) that supports MML interfaces take effect only on an NE. The configuration parameters for another NE cannot be modified at the same time. When modifying NE parameters by using such a client, you need to manually modify the parameters on all related NEs.
3.2 Subnet Configuration Management The EMS-layer configuration solution CME is a standalone service that is set up on the U2000 platform. The CME performs the following: l
Configures network-level parameters and ensures the integrity and consistency of networklevel parameters on NEs.
l
Manages multi-mode products, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunication System (UMTS), and Long Term Evolution (LTE). Data can be interchanged between these products (NEs).
l
Supports concurrent operations of multiple users.
l
Connects to the telecom operator's operations support system (OSS) through the northbound interface.
3.2.1 Software System Structure Figure 3-3 shows the CME software structure. Issue 01 (2014-04-30)
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Figure 3-3 CME software structure
The CME has a client/server (C/S) architecture. You can use the CME client to perform O&M tasks related to configuration on a graphical user interface (GUI). The CME provides wizards to guide you step by step through complex operations in special scenarios, for example, base station deployment or migration. The CME server allows you to manage configuration data for all NEs on the entire network. Complex logical computation is performed based on t hese NE data to process configuration data. The CME server is set up on the U2000 platform. In actual application, the CME has independent logical database space in the U2000 database where it stores and computes data.
3.2.2 Functions Data Shared Between NEs of Different RATs The database design allows different types of NEs to have their own logical database space. NEs of different radio access technologies (RATs), however, can share data. The CME processes data for the entire network, therefore maintaining data consistency network-wide.
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Highly Reliable O&M To facilitate concurrent operations by multiple users and provide highly reliable O&M, the CME provides current and planned data areas. The current data area mirrors the configuration data of all NEs. When the configuration data changes, the CME synchronizes the changed data to the current data area by using the attribute value change (AVC) notification mechanism. This ensures that the configuration data in the current data area is synchronized with the NE data in the network. The configuration data in the current data area is read-only. If you need to modify the data, you must create the corresponding planned data area. When you create a planned data area, the CME copies the data from the current data area to the planned data area to protect data integrity. Therefore, the O&M tasks are carried out by performing configuration operations based on the planned data area. Planned data areas are isolated from each other. Different users can concurrently perform operations for different configuration tasks based on different planned data areas. In addition, the configuration operations based on "offline" planned data areas do not affect the live network. This improves configuration reliability.
Data Validation Mechanism Correct and consistent configuration data is the basis for high performance of network devices. The CME provides the data validation mechanism for configuration operations (including adding, deleting and modifying data) based on the planned area. This ensures that data is logically correct. When you complete configuration operations, the CME generates incremental scripts according to your operations. The CME also provides the script executor, which controls script activation on NEs. The script executor supports multiple activation methods based on configuration application scenarios, such as break on failure and best effort activation, helping monitor and manage activation processes. The CME can manage NEs that are of the same type but support different NE versions on the entire network. The multi-version scheduling module loads NE versions and locates the version that you need. The CME server provides the XML-oriented batch CM interface that is based on Common Object Request Broker Architecture (CORBA) to support multiple client access. The standard CORBA-related protocol messages specified in 3GPP can be processed by the CME server.
3.2.3 Configuration Data Flow Uplink and downlink data interchange in the EMS configuration solution is a closed-loop data flow. The data flow in the C ME-based EMS configuration solution is shown in Figure 3-4.
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Figure 3-4 Data flow in the CME-based EMS configuration solution
The data flow in Figure 3-4 is as follows: 1.
The CME uses the data synchronization function to extract the NE data from the live network to the current data area. The mirrored NE configuration data is generated.
2.
The CME creates multiple planned data areas based on the current data area. Different users can concurrently perform configuration operations based on different planned data areas. These planned data areas are isolated and do not affect each other.
3.
Users perform configuration operations based on planned data areas. The configuration data can be imported from an Excel file, or imported from an XML file through the northbound interface, or configured by using the GUI. After the configuration is complete, users can extract a data modification report and verify that the data has been modified. NOTE
The modified data is highlighted in the CME GUI based on the data modification report.
4.
CME provides the script generation mechanism. CME generates incremental configuration scripts and fallback scripts according to user operations.
5.
When the scripts are activated on an NE, modified configuration data takes effect on the NE.
6.
The NE reports an AVC notification to the CME. The CME updates the data in the current data area according to a preset policy. This ensures that the data in the current data area is synchronized with the data on the live network.
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NOTE
Scripts from different planned data areas can enable an NE to send an AVC notification. If you use the Web LMT or U2000 to perform operations on the NE, the NE can also send an AVC notification.
3.2.4 Northbound Interface The CME supports the batch configuration management of the northbound interface based on XML files. Through the northbound interface, the CME is connected to the telecom operator's NMS. This increases end-to-end configuration efficiency. The telecom operator's NMS has its own planning system that consists of transmission and wireless parameter planning systems. During routine O&M, the planning system determines the network configuration parameters to be optimized based on the monitoring and analysis of network performance. The planning system sends a request to the CME to modify parameters through the northbound interface. The CME analyzes XML files for batch configuration management based on the planned data areas, modifies the data, performs the data validity check, and generates incremental configuration scripts. After the configuration scripts are activated on an NE, the modified parameters take effect on the NE. The NE performance is optimized. Figure 3-5 shows the configuration process through the northbound interface Figure 3-5 Configuration process through the northbound interface
The northbound interface design is in accordance with the following rules: Issue 01 (2014-04-30)
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The uplink and downlink data uses the XML file interface to support batch data configuration through the northbound interface.
l
The northbound interface can be automatically controlled based on CORBA. This complies with 3GPP Release 9.
l
XML files can be manually imported by using the CME client.
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The northbound interface supports all configuration scenarios, including deploying base stations, adjusting transmission, optimizing radio parameters, adjusting neighbor relationship, and migrating base stations.
l
The CME provides only basic functions for modifying parameters in batches, but it cannot provide intelligent and combined service operations. For example, neighbor relationship is dynamically adjusted by the configuration inventory management system of the NMS during migration.
l
The northbound interface supports concurrent operations for multiple northbound interface managers. In RAN sharing application, northbound interface also supports permission control by telecom operator.
l
The earlier version northbound interface also allows new NEs to be managed by the NMS. NOTE
How a northbound interface is interconnected depends on the telecom operator's NMS. Therefore, the CME must be adaptable to the telecom operator's NMS.
Northbound data models are modified based on the northbound parameter exit mechanism, as shown in Figure 3-6. The figure also shows the status of parameters to exit when a version is exiting. Figure 3-6 Northbound parameter exit mechanism
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3.2.5 Typical Application Scenarios Network Planning You need to plan for a network before you deploy, adjust, or optimize the network. The CME supports data imported from the following two sources: l
Data calculated by using a network planning tool
l
Data negotiated with the telecom operator
After obtaining planned data, save the data in XLS summary data files provided by the CME for future configuration.
Network Deployment In this scenario, configure data for newly deployed NEs (base station controllers or base stations) for a new site. The CME provides flexible data configuration methods for a new site. Choose one of the following methods based on site requirements: l
Configuring data by using the GUI This method is applicable to a new NE (base station controller or base station), or adjustment to some data that is configured for NEs in batches. To improve efficiency in configuring data for base stations, the CME provides default templates for different base station types and cells. You can customize these templates to quickly create base stations.
l
Importing data from data planning files This method is applicable when configuring data for base stations that are created in batches and for different interfaces on controllers. When creating base stations in batches, you can also use default or user-defined templates to simplify the process of configuring the same data for base stations or cells. If the base stations or cells have different configuration data, the CME provides a customization tool for XLS summary data files. You can customize the planning summary data files based on site requirements, and import these data files to create base stations in batches.
l
Importing data from XML files through the northbound interface This method is applicable after the CME is connected to the 3GPP Release9-compliant northbound interface of the telecom operator's NMS. After the planning system of the NMS completes network planning, the planning system generates incremental configuration scripts in XML format. The CME imports the XML files to complete data configuration.
After data configuration is completed, the CME exports configuration data files (in MML or XML format) for each NE. You can use the script executor provided by the CME to remotely send the configuration data files to each NE through the U2000 and activate them to remotely perform centralized data configuration for network deployment. You can also use the northbound interface to send a request to the CME to activate configuration data scripts for NEs.
Network Adjustment You need to adjust hardware resources if services are not distributed evenly in a network. Unevenly distributed services are caused by unevenly distributed resources. The network adjustment function addresses this problem. Network adjustment involves increasing or decreasing network capacity and reconstructing networks. Typical scenarios are as follows: Issue 01 (2014-04-30)
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Device capacity expansion: For example, add a service processing board or interface board for an existing controller or base station.
l
Transmission capacity expansion: For example, add an inverse multiplexing over ATM (IMA) link to an IMA group for an existing base station, or adjust the bandwidth of a transmission link.
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Cell or carrier capacity expansion: For example, change the configuration of NodeB from 3 x 1 to 3 x 2.
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Transmission reconstruction or adjustment: For example, change ATM to ATM/IP dual stack for an Iub interface and reconfigure NodeB in an RNC pool from dual homing to single homing.
The CME provides multiple configuration wizards or one-click configuration for the preceding typical scenarios. Prepare the data of planning that you have adjusted in an Excel template and import the data to the planned data area by using the CME configuration wizard. The CME can export incremental configuration scripts in appropriate format for NEs. NOTE
Some scripts take effect only when services in the live network are interrupted or a base station is reset. When this occurs, the CME displays a message before sending scripts. If scripts take effect only when a base station is reset, the CME automatically triggers a base station reset after sending the scripts successfully.
Base Station Migration During site network operation, you need to migrate base stations in the case of network planning, load balancing, and capacity expansion. Base station migration is a complex network adjustment task. The typical scenario for reparenting base station between controllers is as follows: If areas managed by controllers are unevenly planned or the load is unbalanced, you need to replan base stations managed by each controller and reparent some base stations managed by a controller to another controller. By using this method, the network load is balanced. The CME supports the ability to reparent base stations between two controllers that support the same version. To ensure that configuration data is smoothly migrated with a base station and that the network performance remains unchanged, perform the following operations during migration: 1.
Data planning Plan the transmission configuration data for migration. Prepare cell-related data if you reparent base stations between controllers and fill in a data planning file according to planned data.
2.
Script preparation Import the data planning file that you have finished by using the CME migration wizard. This wizard is used to perform the following operations:
l
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Smoothly migrate the data for base stations from source controllers to destination controllers. Recreate the transmission-layer data for destination controllers. The data comes from planned data.
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Smoothly migrate the cell data from source controllers to destination controllers. Some data comes from planned data based on site requirements, for example, location area adjustment.
l
Smoothly migrate neighbor relationships. The neighbor relationship data before migration must be inherited. This is a complex operation that must be performed on the entire network. The network sometimes consists of 2G and 3G devices.
After the data is configured, the CME exports configuration data files (in MML or XML format) for each NE. You can use the script executor provided by the CME to remotely send and activate the configuration data files to each NE through the U2000. NOTE
You are advised to activate the reparenting scripts on the destination controller first. After the commissioning is successful, activate the reparenting scripts on the source controller. This ensures that the data is restored quickly when a fault occurs during the reparenting.
Network Optimization You need to adjust and optimize the current network parameters so that the network can provide better network services. Network optimization is applicable to radio-layer parameter adjustment. This is the difference between network optimization and network adjustment. The CME supports the following typical tasks related to network optimization: l
Adjust frequencies or scrambling codes for cells in batches.
l
Adjust data for neighboring cells or their booster amplifiers (BAs) in batches.
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Adjust algorithm parameters for cells, carriers, and channels in batches.
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Change configurations for some features. For example, reconstruct a cell that uses high speed packet access (HSPA), and change telecom operators of cells from exclusive to multioperator core network (MOCN).
The CME provides the following methods to configure data in batches: l
Importing data from data planning files Export a summary data file from the CME, reconfigure the data in the file, and import the file into the CME to quickly adjust data in batches. This method is applicable when you need to configure different values for multiple objects. The CME provides multiple data planning files for different network optimization tasks.
l
Modifying data in batches by using the wizard Select some or all of the configuration parameters for an object as a reference and apply these parameters to another object. This method is applicable when you need to configure parameters to the same values for a single type of objects.
l
Configuring data by using templates Select some or all of the configuration parameters in a template as reference and apply these parameters to the NEs on the CME. This improves data reconfiguration efficiency. This method is applicable when you need to configure different values for different types of objects.
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Reconfiguring data for some service features The CME provides a configuration wizard that supports one-click configuration for an object.
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Importing data from XML files through the northbound interface This method is applicable after the CME is connected to the 3GPP R9-compliant NBI of the telecom operator's NMS.
After the data is configured, the CME exports configuration data files (in MML or XML format) for each NE. You can use the script executor provided by the CME to remotely send and activate the configuration data files to each NE through the U2000.
Configuration Parameter Management Configuration parameter management allows you to browse, check, and analyze configuration data on the CME. For example, compare data and create a data report. This function does not affect ongoing services because it does not modify data and apply configuration settings to NEs. Configuration parameter management supports the following functions: l
Global data check The network has a large amount of data and the correlations between configuration objects are complex. The CME checks the integrity, redundancy, and consistency of configuration data on the CME. If there is an error, an error report is generated. In addition, the CME automatically recovers certain data according to check results to ensure valid data configuration.
l
Radio-layer algorithm parameter comparison During the initial phase of network construction, algorithm parameters use the default baseline data of the system. During network maintenance and optimization, you can modify certain algorithm parameters according to network performance. You can compare the actual values of the algorithm parameters for the current controller or cell with the default values or configuration baseline data through the CME. The CME highlights the added, modified, and deleted configuration data. This facilitates subsequent optimization and reconfiguration. To help you quickly select the parameters to be compared, the CME provides default parameter sets (parameter filters) according to different NEs and versions. Select the filter and you can quickly filter out your required parameter list. You can also customize parameter filters.
l
Panoramic data browsing The data browsing and searching functions help you effectively locate required information and prepare for the next step in planning and adjustment. The CME allows you to browse panoramic data and search for data. You can browse the configuration information for different objects. For example, the port usage of each interface board, or the number of neighbor relationships configured for each cell. You can also define search criteria to search for required objects.
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Parameter auditing The CME allows you to compare NE configuration parameters at different time to learn configuration data changes during this period. It also allows you to export NE configuration parameters at a specified time.
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Report configuration The CME provides configuration reports for various scenarios during network maintenance. You can view data of multiple NEs of different versions on the live network
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by using configuration reports. You can also use configuration reports to collect statistics on the entire network. Configuration reports can be saved in multiple formats.
3.2.6 Configuration Flow Example Figure 3-7 shows an example using the configuration flow for creating a base station. Figure 3-7 Configuration flow for creating a base station
Step 1 The CME synchronizes data with the live network, as shown in steps 1 through 4 of Figure 3-7.
The CME synchronizes NE configuration data through the southbound interface and the NMS synchronizes the configuration data in the CME through the northbound interface.
Step 2 The NMS planning system starts configuration data planning, as shown in step 5 of Figure 3-7.
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Step 3 The NMS delivers planned configuration data through the northbound interface for the configuration data to take effect on the live network, as shown in steps 6 through 13 of Figure 3-7. ----End
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4 Configuration Security
4
Configuration Security
In configuration management, a series of security measures are provided to protect configuration data. For details, see OM Security Feature Parameter Description.
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5 Parameters
5
Parameters
There are no specific parameters associated with this feature.
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6 Counters
6
Counters
There are no specific counters associated with this feature.
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7 Glossary
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Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary.
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Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
23
SingleRAN Configuration Management Feature Parameter Description
8 Reference Documents
8
Reference Documents
None
Issue 01 (2014-04-30)
Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
24