Activation of a secondary cell group using a user equipment configured for dual connectivity with multiple radio access technologies

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

• detecting radio link failure (RLF) on a master cell group (MCG);
• determining a state of a secondary cell group (SCG) based at least in part on the RLF on the MCG, wherein the state of the SCG is a deactivated state, a dormant state, or an enhanced-dormant state;
• initiating activation of the SCG based at least in part on the state of the SCG, wherein the activation of the SCG comprises transmitting MCG failure recovery information in a random access procedure on the SCG without performing a radio resource control procedure and without transmitting a request for radio resource control re-establishment on the MCG based at least in part on detecting the RLF;
• receiving, on the SCG and based at least in part on transmitting the MCG failure recovery information, MCG reconnection information;
• and
• receiving or transmitting, over the SCG and before failure recovery for the MCG is complete, a data transmission.

A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
• detect radio link failure (RLF) on a master cell group (MCG);
• determine a state of a secondary cell group (SCG) based at least in part on the RLF on the MCG, wherein the state of the SCG is a deactivated state, a dormant state, or an enhanced-dormant state;
• initiate activation of the SCG based at least in part on the state of the SCG, wherein the activation of the SCG comprises transmitting MCG failure recovery information in a random access procedure on the SCG without performing a radio resource control procedure and without transmitting a request for radio resource control re-establishment on the MCG based at least in part on detecting the RLF;
• receive, on the SCG and based at least in part on transmitting the MCG failure recovery information, MCG reconnection information;
• and
• receiving or transmitting, over the SCG and before failure recovery for the MCG is complete, a data transmission.

An apparatus for wireless communication, comprising:

• means for detecting radio link failure (RLF) on a master cell group (MCG);
• means for determining a state of a secondary cell group (SCG) based at least in part on the RLF on the MCG, wherein the state of the SCG is a deactivated state, a dormant state, or an enhanced-dormant state;
• means for initiating activation of the SCG based at least in part on the state of the SCG, wherein the activation of the SCG comprises transmitting MCG failure recovery information in a random access procedure on the SCG without performing a radio resource control procedure and without transmitting a request for radio resource control re-establishment on the MCG based at least in part on detecting the RLF;
• means for receiving, on the SCG and based at least in part on transmitting the MCG failure recovery information, MCG reconnection information;
• and
• means for receiving or transmitting, over the SCG and before failure recovery for the MCG is complete, a data transmission.