Supplementary uplink switching for switching multiple radio frequency bands

A method for wireless communication at a base station, comprising:

• receiving, from a user equipment (UE), first control signaling indicating a UE capability for switching between carriers of a group of carriers during uplink communications using carrier aggregation, the group of carriers including three or more carriers that are each associated with different radio frequency bands and include a supplementary uplink carrier and at least two normal uplink carriers;
• transmitting, to the UE and in response to the first control signaling, second control signaling that includes an indication for the UE to switch to a subset of carriers of the group of carriers for transmission of an uplink message, wherein the subset of carriers is associated with a combination of radio frequency bands;
• and
• receiving the uplink message from the UE on at least one of the subset of carriers in accordance with a mapping between the combination of radio frequency bands and the at least one of the subset of carriers, wherein the mapping is based at least in part on the UE capability.

A user equipment (UE), comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the UE to:
• transmit, to a base station, first control signaling indicating a UE capability for switching between carriers of a group of carriers during uplink communications using carrier aggregation, the group of carriers including three or more carriers that are each associated with different radio frequency bands and include a supplementary uplink carrier and at least two normal uplink carriers;
• receive, from the base station and in response to the first control signaling, second control signaling that includes an indication for the UE to switch to a subset of carriers of the group of carriers for transmission of an uplink message, wherein the subset of carriers is associated with a combination of radio frequency bands;
• and
• transmit the uplink message to the base station on at least one of the subset of carriers in accordance with a mapping between the combination of radio frequency bands and the at least one of the subset of carriers, wherein the mapping is based at least in part on the UE capability.

A base station, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the base station to:
• receive, from a user equipment (UE), first control signaling indicating a UE capability for switching between carriers of a group of carriers during uplink communications using carrier aggregation, the group of carriers including three or more carriers that are each associated with different radio frequency bands and include a supplementary uplink carrier and at least two normal uplink carriers;
• transmit, to the UE and in response to the first control signaling, second control signaling that includes an indication for the UE to switch to a subset of carriers of the group of carriers for transmission of an uplink message, wherein the subset of carriers is associated with a combination of radio frequency bands;
• and
• receive the uplink message from the UE on at least one of the subset of carriers in accordance with a mapping between the combination of radio frequency bands and the at least one of the subset of carriers, wherein the mapping is based at least in part on the UE capability.