Survival time state triggering and fallback for duplication with dual-connectivity

A method for a user equipment comprising:

• determining a number of medium access control entities associated with at least one active radio link control entity of a radio bearer;
• determining at least one condition for switching a state associated with the radio bearer based, at least partially, on the determined number of medium access control entities, wherein the at least one condition comprises a determination that a packet is successfully or not successfully delivered;
• determining that the determined at least one condition for switching the state associated with the radio bearer is satisfied;
• switching the state associated with the radio bearer from a first state wherein the first state comprises a normal state, to a second state, wherein the second state comprises a survival time state, based, at least partially, on determining that the at least one condition for switching the state associated with the radio bearer is satisfied;
• and
• receiving a configuration message relating to packet duplication, wherein the received configuration message relating to packet duplication comprises, at least, a first set of radio link control entities to be activated in the first state, and a second set of radio link control entities to be activated in the second state, wherein the second set is at least partially different from the first set, wherein at least one of the first set or the second set comprises radio link entities associated with a plurality of medium access control entities.

A non-transitory computer-readable medium comprising instructions stored thereon for performing at least the following:

• causing determining of a number of medium access control entities associated with at least one active radio link control entity of a radio bearer;
• causing determining of at least one condition for switching a state associated with the radio bearer based, at least partially, on the determined number of medium access control entities, wherein the at least one condition comprises a determination that a packet is successfully or not successfully delivered;
• causing determining that the determined at least one condition for switching the state associated with the radio bearer is satisfied;
• causing switching of the state associated with the radio bearer from a first state wherein the first state comprises a normal state, to a second state, wherein the second state comprises a survival time state, based, at least partially, on determining that the at least one condition for switching the state associated with the radio bearer is satisfied;
• and
• causing receiving of a configuration message relating to packet duplication, wherein the received configuration message relating to packet duplication comprises, at least, a first set of radio link control entities to be activated in the first state, and a second set of radio link control entities to be activated in the second state, wherein the second set is at least partially different from the first set, wherein at least one of the first set or the second set comprises radio link entities associated with a plurality of medium access control entities.