Secondary cell group activation by bandwidth part for dual connectivity with multiple radio access technologies

A network node for wireless communication, comprising:

• one or more memories;
• and
• one or more processors, coupled to the one or more memories, configured to:
• determine to instruct a user equipment (UE) to enter into a secondary cell group (SCG) deactivated state or an SCG activated state, in connection with multiple radio access technology dual connectivity;
• transmit a control message to the UE indicating for the UE to switch to a deactivated downlink bandwidth part (BWP) configured for a primary secondary cell of the SCG for operating in the SCG deactivated state or an activated downlink BWP configured for the primary secondary cell for operating in the SCG activated state;
• determine to instruct the UE to enter the SCG deactivated state;
• and
• transmit a medium access control control element (MAC-CE) on the primary secondary cell, indicating for the UE to transition to the SCG deactivated state, wherein the MAC-CE is to cause the UE to operate in the SCG deactivated state in which the UE is configured to refrain from monitoring a physical downlink control channel on a primary secondary cell of the SCG, refrain from transmitting uplink communications on the primary secondary cell, refrain from performing channel state information (CSI) measurements on the primary secondary cell, refrain from maintaining uplink timing alignment with a secondary node in the primary secondary cell, and perform radio resource management measurements on the primary secondary cell.

A method of wireless communication performed by a user equipment (UE), comprising:

• operating, in connection with a secondary cell group (SCG) for multiple radio access technology dual connectivity, in an SCG deactivated state in a downlink bandwidth part (BWP) configured for a primary secondary cell of the SCG;
• receiving a control message associated with activating the SCG for the UE, the control message indicating a BWP switch for the UE;
• switching, in connection with receiving the control message, from the downlink BWP to an activated downlink BWP in which the UE operates in an SCG activated state;
• and
• transmit, after entering the SCG activated state from the SCG deactivated state, uplink communications without performing a random access channel procedure.