Network slice management

An apparatus comprising at least one processing core and at least one memory storing instructions that, when executed by the at least one processing core, cause the apparatus at least to:

• camp in idle or inactive state in a cell controlled by a base station which is comprised in a network;
• process, while remaining in the idle or inactive state, a network slice group definition validity indication received from the base station;
• trigger a non-access stratum registration update process with the network, wherein the non-access stratum registration update process comprises the apparatus obtaining an updated network slice group mapping from the network, and
• use the updated network slice group mapping in a subsequent cell re-selection.

A non-transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least:

• camp in idle or inactive state on a cell controlled by a base station which is comprised in a network;
• process, while remaining in the idle or inactive state, a network slice group definition validity indication received from the base station;
• trigger a non-access stratum registration update process with the network, wherein the non-access stratum registration update process comprises the apparatus obtaining an updated network slice group mapping from the network, and
• use the updated network slice group mapping in a subsequent cell re-selection.