System and method for supporting inter-band carrier aggregation with different UL/DL TDD configurations

A user equipment (UE), comprising:

• at least one hardware processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one hardware processor and storing programming instructions for execution by the at least one hardware processor, wherein the programming instructions, when executed, cause the at least one hardware processor to perform operations comprising:
• transmitting, using a primary time division duplex (TDD) configuration, data on a primary component carrier in a first frequency band;
• transmitting, using a secondary TDD configuration, data on a secondary component carrier, in a secondary frequency band different from the first frequency band;
• and
• receiving, using a supplemental TDD configuration, a Hybrid Automatic Repeat Request (HARD) ACK/NACK for the data transmitted on the second component carrier, wherein the supplemental TDD configuration is determined by combining a plurality of uplink subframes to form a set of uplink subframes, the set of uplink subframes including uplink subframes in the primary TDD configuration and uplink subframes in the secondary TDD configuration.

A non-transitory computer-readable medium storing instructions which, when executed, cause a computing device to perform operations comprising:

• transmitting, using a primary time division duplex (TDD) configuration, data on a primary component carrier in a first frequency band;
• transmitting, using a secondary TDD configuration, data on a secondary component carrier, in a secondary frequency band different from the first frequency band;
• and
• receiving, using a supplemental TDD configuration, a Hybrid Automatic Repeat Request (HARD) ACK/NACK for the data transmitted on the second component carrier, wherein the supplemental TDD configuration is determined by combining a plurality of uplink subframes to form a set of uplink subframes, the set of uplink subframes including uplink subframes in the primary TDD configuration and uplink subframes in the secondary TDD configuration.