2.5 Lifecycle Requirements

Hardware life expectancy and the ability to accommodate future requirements are covered in the following sections.

2.5.1 Hardware Life Expectancy

2.5.1.1 The UTT system terminal, including internal battery, shall have a 7-year design life from date of manufacture.

2.5.1.2 The UTT system terminal, including internal battery, shall have a 1-year shelf life without receiving external power.

2.5.2 Ability to Accommodate Future Requirements

OTA Upgrade capability

Definition

The OTA upgrade capability allows patches or upgrades to mobile terminal firmware without direct access to the UTT system equipment on the trailer. The OTA upgrade feature is capable of performing "bug fixes," regular maintenance upgrades, and installation of new features.

Performance constraints and requirements

2.5.2.1 OTA upgrades to the UTT system shall be initiated and controlled by the UTT-system provider.

2.5.2.2 The OTA upgrades for the UTT system shall be provided to the terminal within 7 days of the user request if the terminal is able to communicate over the air and is not hibernating.

2.5.2.3 An OTA upgrade for an entire fleet shall be available to the UTT system user.

2.5.2.4 Non-sequential software upgrades for the UTT system shall be available to the UTT system user. (Non-sequential upgrade capability allows a terminal with software version 1.0, for example, to function properly when upgraded to version 3.0 even if it never received version 2.0.)

2.5.2.5 An OTA upgrade transfer shall delay the regular forward or return messaging to a UTT system terminal by no more than 1 hour.

2.5.2.6 An OTA upgrade transfer shall not disrupt or delay regular UTT system processing, such as GPS positioning by more than 1 hour.

2.5.2.7 The OTA upgrade shall not tax the vehicle battery resources if the vehicle battery is at or below the low voltage threshold.

2.5.2.8 The OTA upgrade feature shall manage the applicability and availability of the software upgrades based on the hardware configuration of the UTT system mobile terminal, the software configuration of the mobile terminal, and the user's account software configuration.

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