Preconfigured uplink resources—configuration for TA validity in entire cell

A wireless device of a cellular communications system enabled to determine timing advance, TA, validity, the wireless device comprising processing circuitry coupled to a memory, the processing circuitry configured to:

• obtain a TA for a cell of the cellular communications system;
• determine that none of a predefined set of TA validation mechanisms are configured, wherein:
• each TA validation mechanism comprises a TA validation functionality of the wireless device that corresponds to one or more configuration parameters within an information element (IE) transmitted to the wireless device and operates according to the one or more configuration parameters;
• and
• the processing circuitry is configured to determine that none of the predefined set of TA validation mechanisms are configured by being configured to determine, for each TA validation mechanism of the predefined set of TA validation mechanism, that the one or more configuration parameters are absent from the IE or indicate that the TA validation mechanism is not to be performed by the wireless device;
• and
• responsive to determining that none of the predefined set of TA validation mechanisms are configured, determine that the TA is valid for an entirety of the cell.

A method performed by a wireless device of a cellular communications system to determine timing advance, TA, validity, the method comprising:

• obtaining a TA for a cell;
• receiving one or more configurations of a corresponding one or more TA validation mechanisms, wherein:
• each configuration comprises one or more configuration parameters within an information element (IE) transmitted to the wireless device;
• and
• each TA validation mechanism comprises a TA validation functionality of the wireless device that operates according to a corresponding configuration;
• receiving a first timer;
• determining that the first timer is set to infinity;
• responsive to determining that the first timer is set to infinity:
• determining that the TA is valid for an entirety of the cell;
• and
• responsive to determining that the TA is valid for the entirety of the cell, disabling the one or more TA validation mechanisms;
• receiving a second timer;
• determining that the second timer is not set to infinity;
• and
• responsive to determining that the second timer is not set to infinity, interpreting the second timer as an indication of how long the TA is considered valid.

A wireless device of a cellular communications system enabled to determine timing advance, TA, validity, the wireless device comprising processing circuitry coupled to a memory, the processing circuitry configured to:

• obtain a TA for a cell;
• receive one or more configurations of a corresponding one or more TA validation mechanisms, wherein:
• each configuration comprises one or more configuration parameters within an information element (IE) transmitted to the wireless device;
• and
• each TA validation mechanism comprises a TA validation functionality of the wireless device that operates according to a corresponding configuration;
• receive a first timer;
• determine that the first timer is set to infinity;
• responsive to determining that the first timer is set to infinity:
• determine that the TA is valid for an entirety of the cell;
• and
• responsive to determining that the TA is valid for the entirety of the cell, disable the one or more TA validation mechanisms;
• receive a second timer;
• determine that the second timer is not set to infinity;
• and
• responsive to determining that the second timer is not set to infinity, interpret the second timer as an indication of how long the TA is considered valid.