1. Application Description

1) Service Description

An upgrade guide details the upgrade and rollback procedures and operations, and provides answers to frequently asked questions (FAQs) and troubleshooting methods for the USN9810.

2) Documentation Description

a. The upgrade guide is intended for engineers responsible for an upgrade. Requirements for the engineers:

• Be familiar with the network topology and versions of related network elements (NEs).
• Have experience in equipment maintenance and be familiar with equipment operation and maintenance modes.

b. The upgrade guide describes the process of upgrading equipment from an earlier version to a later version, and includes the following information:

Pre-upgrade preparations, upgrade implementation, verification after an upgrade, and version rollback.

Detailed operations and purposes are as follows:

• Pre-upgrade preparations: prepare the documents and software package related to an upgrade, back up system data, and perform a pre-upgrade check.
• Upgrade implementation: loads the target software version from the OMU board to the service board and enable the target software version to take effect by resetting the service board.
• Verification after an upgrade: checks whether the number of subscribers served by the system increases steadily and whether the charging function is normal.
• Version rollback: rolls back the software version to verify whether the rollback function is normal.

c. The upgrade modes include a common upgrade and a hitless upgrade, and support the WEBUI-based upgrade.

• Services will be interrupted for 90 seconds and 10 minutes during a hitless upgrade and a common upgrade, respectively.

2. Highlights

The upgrade guides are distinguished by version and upgrade path, and upgrade operations are accurate and easy to follow.

• The serving GPRS support node (SGSN) V900R010C02SPC300 can be upgraded to the latest USN9810 version.
• The USN9810 in an earlier version can be upgraded to the USN9810 in the latest version.
• The serving SGSN and charging gateway (CG) sharing an OMU board can be upgraded.
• The unified service node (USN) and CG sharing an OMU board can be upgraded.

3. Reference Documents

For details about operation documents used for an upgrade, contact the local Huawei technical support. The following table lists the upgrade of the SGSN V900R010C02SPC300 and USN V900R011C01SPC300.  

Product Before an Upgrade	Link
SGSN V900R010C02SPC300	USN9810 V900R013C00 Upgrade Guide (Applicable to the Upgrade from the SGSN9810 V900R010C02SPC300).doc
USN V900R011C01SPC300	USN9810 V900R013C00 Seamless Upgrade Guide (Applicable to the Upgrade from USN9810).doc

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