Method and device for allocating resource through carrier aggregation in V2X system
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a resource selection operation through carrier aggregation in V2X communication.
1 . A method of a first terminal in a wireless communication system, the method comprising:
identifying a first carrier and a second carrier for a sidelink communication;
identifying that a first symbol part of a slot within a resource selection window of the first carrier is selected by the first terminal for the second carrier and a second symbol part of the slot is not selected for the second carrier;
excluding the first symbol part from selectable resource candidates in the resource selection window;
determining whether to include the second symbol part in the selectable resource candidates, based on a transmission chain switching time of the first terminal;
selecting at least one resource for transmitting sidelink data in the resource selection window based on the selectable resource candidates; and
transmitting, to a second terminal, the sidelink data through the selected at least one resource.
2 . The method of claim 1 , wherein, in case that at least one gap symbol of the second carrier covers the transmission chain switching time, the second symbol part is included in the selectable resource candidates.
3 . The method of claim 1 , wherein, in case that at least one gap symbol of the second carrier does not cover the transmission chain switching time, the second symbol part is excluded from the selectable resource candidates.
4 . The method of claim 2 , wherein, in case that the at least one resource selected for transmitting the sidelink data includes the second symbol part, sidelink control information (SCI) indicating the second symbol part is transmitted to the second terminal.
5 . The method of claim 1 , wherein the first terminal has a limited capability that does not support carrier aggregation of the first carrier and the second carrier within the slot.
6 . The method of claim 1 , wherein the transmission chain switching time is based on at least one of:
a frequency range in which a transmission chain switching occurs,
a numerology of the second carrier, or
whether the transmission chain switching is an in-band transmission chain switching or an inter-band transmission chain switching.
7 . The method of claim 1 , further comprising
receiving, from a base station, a resource pool configuration indicating that a reference signal received power (RSRP) of a physical sidelink shared channel (PSSCH) is not used for sidelink resource selection.
8 . A first terminal in a wireless communication system, comprising:
a transceiver; and
a controller configured to:
identify a first carrier and a second carrier for a sidelink communication,
identify that a first symbol part of a slot within a resource selection window of the first carrier is selected by the first terminal for the second carrier and a second symbol part of the slot is not selected for the second carrier,
exclude the first symbol part from selectable resource candidates in the resource selection window,
determine whether to include the second symbol part in the selectable resource candidates, based on a transmission chain switching time of the first terminal,
select at least one resource for transmitting sidelink data in the resource selection window based on the selectable resource candidates, and
transmit, to a second terminal via the transceiver, the sidelink data through the selected at least one resource.
9 . The first terminal of claim 8 , wherein, in case that at least one gap symbol of the second carrier covers the transmission chain switching time, the second symbol part is included in the selectable resource candidates.
10 . The first terminal of claim 8 , wherein, in case that at least one gap symbol of the second carrier does not cover the transmission chain switching time, the second symbol part is excluded from the selectable resource candidates.
11 . The first terminal of claim 9 , wherein, in case that the selected at least one resource for transmitting the sidelink data includes the second symbol part, sidelink control information (SCI) indicating the second symbol part is transmitted to the second terminal.
12 . The first terminal of claim 8 , wherein the first terminal has a limited capability that does not support carrier aggregation of the first carrier and the second carrier within the slot.
13 . The first terminal of claim 8 , wherein the transmission chain switching time is based on at least one of:
a frequency range in which a transmission chain switching occurs,
a numerology of the second carrier, or
whether the transmission chain switching is an in-band transmission chain switching or an inter-band transmission chain switching.
14 . The first terminal of claim 8 , wherein the controller is further configured to receive, from a base station via the transceiver, a resource pool configuration indicating that a reference signal received power (RSRP) of a physical sidelink shared channel (PSSCH) is not used for sidelink resource selection.