Apparatus and method for controlling sidelink auxiliary carrier in wireless communication system
Provided is a first terminal for performing unicast communication between terminals in a wireless communication system. The first terminal may be configured to: transmit a packet to a second terminal through a first sidelink carrier; determine a failure of the first sidelink carrier based on at least one of a number of times of retransmission of the transmitted packet, a number of times of reception of hybrid automatic repeat request (HARQ) negative acknowledgement (NACK) or discontinuous transmission (DTX) for the transmitted packet, or a number of times of continuous out of synch (OOS) for the first sidelink carrier; and determine whether to perform a radio link failure (RLF) handling procedure or whether to perform a carrier failure handling procedure, based on a result of the determining of the failure and the first sidelink carrier, wherein the carrier failure handling procedure may be performed based on at least one of a connection state between the first terminal and a base station or a need for multi-carrier transmission.
1. A method performed by a terminal in a wireless communication system, the method comprising:
performing a sidelink transmission associated with a plurality of sidelink carriers;
identifying whether all of the plurality of sidelink carriers are unavailable, based on a hybrid automatic repeat request (HARQ) operation;
in case that all of the plurality of sidelink carriers are unavailable, identifying a detection of a sidelink radio link failure (RLF); and
transmitting, to a base station, information associated with the sidelink RLF.
2. The method of claim 1 , further comprising:
in case that at least one of the plurality of sidelink carriers is available and that a sidelink carrier failure occurs in a sidelink carrier, transmitting, to the base station, information associated with the sidelink carrier failure.
3. The method of claim 2 , wherein the information associated with the sidelink carrier failure includes a parameter indicating a destination identity for the sidelink carrier failure and a parameter indicating the sidelink carrier associated with the sidelink carrier failure.
4. The method of claim 1 , further comprising:
in case that at least one of the plurality of sidelink carriers is available and that a sidelink carrier failure occurs in a sidelink carrier, performing a carrier selection or reselection procedure.
5. The method of claim 4 , wherein the carrier selection or reselection procedure is performed based on configuration information for a carrier selection or reselection.
6. The method of claim 5 , wherein the configuration information for the carrier selection or reselection is received from the base station.
7. The method of claim 5 , wherein the configuration information for the carrier selection or reselection includes information associated with a logical channel and information associated with a channel busy ratio (CBR).
8. The method of claim 7 , wherein the performing of the carrier selection or reselection procedure comprises:
selecting a carrier with a lowest CBR, from among one or more candidate carriers for the carrier selection or reselection.
9. The method of claim 4 , wherein the carrier selection or reselection procedure is associated with multiple carrier transmission related capability information, for unicast.
10. The method of claim 1 , wherein the terminal is in a radio resource control (RRC) connected state.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
perform a sidelink transmission associated with a plurality of sidelink carriers;
identify whether all of the plurality of sidelink carriers are unavailable, based on a hybrid automatic repeat request (HARQ) operation;
in case that all of the plurality of sidelink carriers are unavailable, identify a detection of a sidelink radio link failure (RLF); and
transmit, to a base station, information associated with the sidelink RLF.
12. The terminal of claim 11 , wherein the at least one processor is further configured to:
in case that at least one of the plurality of sidelink carriers is available and that a sidelink carrier failure occurs in a sidelink carrier, transmit, to the base station, information associated with the sidelink carrier failure.
13. The terminal of claim 12 , wherein the information associated with the sidelink carrier failure includes a parameter indicating a destination identity for the sidelink carrier failure and a parameter indicating the sidelink carrier associated with the sidelink carrier failure.
14. The terminal of claim 11 , wherein the at least one processor is further configured to:
in case that at least one of the plurality of sidelink carriers is available and that a sidelink carrier failure occurs in a sidelink carrier, perform a carrier selection or reselection procedure.
15. The terminal of claim 14 , wherein the carrier selection or reselection procedure is performed based on configuration information for a carrier selection or reselection.