Methods and apparatuses for a scg deactivation mechanism and a scg activation mechanism in a mr-dc scenario

A method performed by a network node, the method comprising:

• transmitting configuration information for an inactivity timer;
• and
• performing, after expiry of the inactivity timer, a secondary cell group (SCG) deactivation procedure to deactivate a SCG based on a detected user data volume decrease or user data inactivity at the SCG.

A method performed by a network node, the method comprising:

• activating a secondary cell group (SCG) based on detection of at least one of a high user data volume, a packet arrival at a SCG radio bearer, or a master node (MN) link failure;
• and
• performing a SCG activation procedure in response to activation of the SCG, including transmitting a SCG activation request that includes a SCG activation reason, and receiving an SCG activation acknowledgement.