TDM transmission for inter-RAT dual connectivity UE

An apparatus, comprising:

• a memory;
• and
• at least one processor in communication with the memory, wherein the at least one processor is configured to:
• generate instructions to establish a first wireless link with a first cell according to the first RAT, wherein the first cell operates in a first system bandwidth;
• generate instructions to establish a second wireless link with a second cell according to a second RAT, wherein the second cell operates in a second system bandwidth;
• transmit a first indication that the wireless device supports uplink sharing for one or more of the first or second frequency system bandwidths to one of the first or second cells, wherein the first and second system bandwidths are at least partially overlapping;
• provide, to one of the first cell or the second cell, binary information indicating one of no retuning time needed and retuning time needed;
• determine whether the wireless device has uplink activity scheduled according to both the first RAT and the second RAT;
• and
• generate instructions to perform uplink (UL) activity for both the first RAT and the second RAT by time division multiplexing (TDM) uplink data for the first RAT and uplink data for the second RAT if uplink activity is scheduled according to both the first RAT and the second RAT.

A non-transitory computer readable memory medium storing program instructions executable by processing circuitry to cause a user equipment device (UE) to:

• establish a first wireless link with a first base station according to a first radio access technology (RAT) and a second wireless link with a second base station according to a second RAT, wherein the first base station operates in a first system bandwidth, and wherein the second base station operates in a second system bandwidth;
• determine that the UE is not configured to transmit on the first RAT and the second RAT simultaneously;
• generate instructions to transmit an indication that the UE is not configured to transmit on the first RAT and the second RAT simultaneously;
• provide, to one of the first cell or the second cell, binary information indicating one of no retuning time needed and retuning time needed;
• receive, from one or more of the first or second cells, an allocation of first uplink resources associated with the first RAT and an allocation of a second uplink resources associated with the second RAT;
• and
• generate instructions to perform uplink (UL) activity for both the first RAT and the second RAT according to time division multiplexing (TDM) of uplink data for the first RAT and uplink data for the second RAT.