Joint scheduling of sidelink and Uu link

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

• transmitting a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with a base station and a sidelink transmission on a sidelink with another UE, wherein the joint BSR is associated with a relative latency of the uplink transmission and the sidelink transmission;
• receiving, from the base station, a joint transmission grant scheduling the uplink transmission on a first set of resources and scheduling the sidelink transmission on a second set of resources;
• transmitting a first transmission on the first set of resources for the uplink transmission and a second transmission on the second set of resources for the sidelink transmission;
• receiving, from the base station, a joint reception grant scheduling a downlink transmission from the base station on a third set of resources and a sidelink reception for the UE on a fourth set of resources;
• and
• receiving the downlink transmission from the base station on the third set of resources and the sidelink reception from the other UE on the fourth set of resources;
• wherein;
• the joint transmission grant and the joint reception grant schedule a gap between the sidelink reception and the uplink transmission or the sidelink transmission;
• or
• the joint reception grant is received as two downlink control informations (DCIs).

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

• transmitting a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with a base station and a sidelink transmission on a sidelink with another UE, wherein the joint BSR is associated with a relative latency of the uplink transmission and the sidelink transmission;
• receiving, from the base station, a joint transmission grant scheduling the uplink transmission on a first set of resources and scheduling the sidelink transmission on a second set of resources;
• transmitting a first transmission on the first set of resources for the uplink transmission and a second transmission on the second set of resources for the sidelink transmission;
• wherein the joint BSR indicates a first buffer size level for a Uu uplink buffer and a second buffer size level for a sidelink buffer, the relative latency, and a transmission order of the uplink transmission and the sidelink transmission;
• and
• wherein;
• the joint BSR includes the first buffer size level and the second buffer size level in consecutive MAC PDUs;
• or
• the transmission order is indicated by an order of the first buffer size level and the second buffer size level.

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

• receiving, from a user equipment (UE), a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with the UE and a sidelink transmission on a sidelink between the UE and another UE, wherein the joint scheduling request is associated with a relative latency of the uplink transmission and the sidelink transmission;
• scheduling the uplink transmission and the sidelink transmission on a common set of resources based on the relative latency of the uplink transmission and the sidelink transmission;
• transmitting a joint transmission grant indicating a first set of resources for the uplink transmission and a second set of resources for the sidelink transmission;
• and
• receiving, from the UE, a first transmission on the first set of resources for the uplink transmission;
• wherein the joint transmission grant schedules a transmission gap between the uplink transmission and the sidelink transmission.

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

• receiving, from a user equipment (UE), a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with the UE and a sidelink transmission on a sidelink between the UE and another UE, wherein the joint scheduling request is associated with a relative latency of the uplink transmission and the sidelink transmission;
• scheduling the uplink transmission and the sidelink transmission on a common set of resources based on the relative latency of the uplink transmission and the sidelink transmission;
• transmitting a joint transmission grant indicating a first set of resources for the uplink transmission and a second set of resources for the sidelink transmission;
• receiving, from the UE, a first transmission on the first set of resources for the uplink transmission;
• wherein the joint BSR indicates a first buffer size level for a Uu uplink buffer and a second buffer size level for a sidelink buffer, the relative latency, and a transmission order of the uplink transmission and the sidelink transmission;
• wherein the joint BSR includes the first buffer size level and the second buffer size level in a single media access control (MAC) control element (CE);
• and
• wherein:
• the joint BSR includes the first buffer size level and the second buffer size level in consecutive MAC PDUs;
• or
• the transmission order is indicated by an order of the first buffer size level and the second buffer size level.

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

• receiving, from a user equipment (UE), a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with the UE and a sidelink transmission on a sidelink between the UE and another UE, wherein the joint scheduling request is associated with a relative latency of the uplink transmission and the sidelink transmission;
• scheduling the uplink transmission and the sidelink transmission on a common set of resources based on the relative latency of the uplink transmission and the sidelink transmission;
• transmitting a joint transmission grant indicating a first set of resources for the uplink transmission and a second set of resources for the sidelink transmission;
• receiving, from the UE, a first transmission on the first set of resources for the uplink transmission;
• receiving a downlink data packet for the UE;
• scheduling a downlink transmission and a sidelink reception on a common set of resources based on a relative latency of the downlink transmission and the sidelink reception;
• transmitting, from the base station, a joint reception grant indicating a third set of resources for a downlink transmission from the base station and a fourth set of resources for a sidelink reception for the UE;
• and
• transmitting the downlink data packet on the downlink transmission on the third set of resources;
• wherein the joint transmission grant and the joint reception grant schedule a gap between the sidelink reception and the uplink transmission or the sidelink transmission.

An apparatus for wireless communication, comprising:

• a memory storing computer-executable instructions;
• and
• at least one processor coupled to the memory and configured to execute the instructions to:
• transmit, from a user equipment (UE), a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with a base station and a sidelink transmission on a sidelink with another UE, wherein the joint BSR is associated with a relative latency of the uplink transmission and the sidelink transmission;
• receive, from the base station, a joint transmission grant scheduling the uplink transmission on a first set of resources and scheduling the sidelink transmission on a second set of resources;
• and
• transmit, from the UE, a first transmission on the first set of resources for the uplink transmission and a second transmission on the second set of resources for the sidelink transmission;
• wherein the joint transmission grant schedules a transmission gap between the uplink transmission and the sidelink transmission.

An apparatus for wireless communication, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive, from a user equipment (UE), a joint scheduling request and a joint buffer status report (BSR) for an uplink transmission on a Uu link with the UE and a sidelink transmission on a sidelink between the UE and another UE, wherein the joint scheduling request is associated with a relative latency of the uplink transmission and the sidelink transmission;
• schedule the uplink transmission and the sidelink transmission on a common set of resources based on the relative latency of the uplink transmission and the sidelink transmission;
• transmit a joint transmission grant indicating a first set of resources for the uplink transmission and a second set of resources for the sidelink transmission;
• and
• receive, from the UE, a first transmission on the first set of resources for the uplink transmission;
• wherein the joint transmission grant schedules a transmission gap between the uplink transmission and the sidelink transmission.