Method and apparatus for performing relay communication in a wireless communication system

At least one non-transitory computer-readable storage medium comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations, the operations comprising:

• establishing a first direct connection with a first intermediate relay user equipment (UE) for UE-to-network (U2N) relay;
• receiving, through the first direct connection, a radio resource control (RRC) setup request message of a remote UE;
• transmitting the RRC setup request message to a base station (BS);
• receiving, from the BS, a first message comprising Quality of Service (QoS) information related to the U2N relay;
• and
• transmitting, to the first intermediate relay UE, a second message comprising a second split QoS value determined for the first direct connection based on the QoS information,
• wherein the QoS information comprises a remaining QoS value obtained by excluding a first split QoS value for a connection between the BS and a UE from an end-to-end (e2e) QoS value for the U2N relay.

A user equipment (UE) comprising:

• a radio frequency (RF) transceiver;
• and
• a processor connected to the RF transceiver,
• wherein the processor is configured to control the RF transceiver to:
• establish a first direct connection with a first intermediate relay UE for UE-to-network (U2N) relay;
• receive, through the first direct connection, a radio resource control (RRC) setup request message of a remote UE;
• transmit the RRC setup request message to a base station (BS);
• receive, from the BS, a first message comprising Quality of Service (QoS) information related to the U2N relay;
• and
• transmit, to the first intermediate relay UE, a second message comprising a second split QoS value determined for the first direct connection based on the QoS information, and
• wherein the QoS information comprises a remaining QoS value obtained by excluding a first split QoS value for a connection between the BS and the UE from an end-to-end (e2e) QoS value for the U2N relay.

A processing device configured to control a user equipment (UE), the processing device comprising:

• at least one processor;
• and
• at least one memory connected to the at least one processor and configured to store instructions that, when executed by the at least one processor, cause the UE to:
• establish a first direct connection with a first intermediate relay UE for UE-to-network (U2N) relay;
• receive, through the first direct connection, a radio resource control (RRC) setup request message of a remote UE;
• transmit the RRC setup request message of the remote UE to a base station (BS);
• receive, from the BS, a first message comprising Quality of Service (QoS) information related to the U2N relay;
• and
• transmit, to the first intermediate relay UE, a second message comprising a second split QoS value determined for the first direct connection based on the QoS information, and
• wherein the QoS information comprises a remaining QoS value obtained by excluding a first split QoS value for a connection between the BS and the UE from an end-to-end (e2e) QoS value for the U2N relay.

A method comprising:

• receiving, by a base station (BS), a radio resource control (RRC) setup request message of a remote user equipment (UE) for UE-to-network (U2N) relay from a relay UE;
• transmitting, by the BS, an RRC setup message for the remote UE to the relay UE;
• and
• transmitting, by the BS, a first message comprising Quality of Service (QoS) information related to the U2N relay to the relay UE,
• wherein the QoS information comprises a remaining QoS value obtained by excluding a first split QoS value for a connection between the BS and the relay UE from an end-to-end (e2e) QoS value for the U2N relay.

A base station (BS) comprising:

• a radio frequency (RF) transceiver;
• and
• a processor connected to the RF transceiver,
• wherein the processor is configured to control the RF transceiver to:
• receive a radio resource control (RRC) setup request message of a remote user equipment (UE) for UE-to-network (U2N) relay from a relay UE;
• transmit an RRC setup message for the remote UE to the relay UE;
• and
• transmit a first message comprising Quality of Service (QoS) information related to the U2N relay to the relay UE, and
• wherein the QoS information comprises a remaining QoS value obtained by excluding a first split QoS value for a connection between the BS and the relay UE from an end-to-end (e2e) QoS value for the U2N relay.