Method and apparatus for performing sidelink transmission on basis of PUCCH processing time in NR V2X
Proposed is a method by which a first device performs wireless communication. The method may comprise the steps of: receiving, from a base station, information related to a first physical uplink control channel (PUCCH) resource and information related to a time gap between a physical sidelink feedback channel (PSFCH) and a PUCCH; transmitting sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH); transmitting sidelink data to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determining a PSFCH resource on the basis of an index of a slot and an index of a subchannel which are related to the PSSCH, wherein, on the basis of the fact that a time gap between the determined PSFCH resource and the first PUCCH resource is smaller than the time gap between the PSFCH and the PUCCH, the first device drops transmission of a hybrid automatic repeat request (HARQ) feedback related to the sidelink data on the first PUCCH resource; receiving, from the base station, information related to a second PUCCH resource, on the basis of the transmission of the HARQ feedback being dropped; and transmitting an acknowledgment (ACK) related to the sidelink data to the base station on the basis of the second PUCCH resource.
1 . A method comprising:
transmitting information related to a time gap between a system frame number 0 related to Uu link and a direct frame number 0 related to inter-device link to a base station;
receiving information related to a first physical uplink control channel (PUCCH) resource and information related to a time gap between an inter-device physical feedback channel and a PUCCH from the base station,
wherein the information related to the time gap between an inter-device physical feedback channel and a PUCCH is configured by the base station, based on the information related to the time gap between the system frame number 0 and the direct frame number 0;
transmitting inter-device control information to a second device through an inter-device physical control channel;
transmitting inter-device data, to the second device, through an inter-device physical shared channel related to the inter-device physical control channel;
determining an inter-device physical feedback channel resource, based on an index of a subchannel and an index of a slot related to the inter-device physical shared channel,
wherein a first device drops a transmission of a hybrid automatic repeat request (HARQ) feedback related to the inter-device data on the first PUCCH resource, based on a time gap between the determined inter-device physical feedback channel resource and the first PUCCH resource being smaller than the time gap between a inter-device physical feedback channel and a PUCCH;
receiving information related to a second PUCCH resource, from the base station, based on the transmission of the HARQ feedback being dropped; and
transmitting an acknowledgement related to the inter-device data to the base station, based on the second PUCCH resource,
wherein the information related to the time gap between the system frame number 0 and the direct frame number 0 is transmitted to the base station periodically with a pre-configured period.
2 . The method of claim 1 , wherein the information related to the time gap between the system frame number 0 and the direct frame number 0 is transmitted to the base station based on a synchronization reference source for inter-device communication being changed.
3 . The method of claim 1 , further comprising:
transmitting the inter-device data, to the second device, through a resource selected by the first device, based on not performing a retransmission based on a HARQ feedback related to the inter-device data; and
transmitting indication information for releasing at least one of a inter-device physical control channel resource, a inter-device physical shared channel resource, a inter-device physical feedback channel resource or a PUCCH resource, allocated to the first device by the base station.
4 . The method of claim 1 , further comprising:
transmitting indication information, to the base station, for releasing a periodic PUCCH resource related to the first PUCCH resource,
wherein the indication information is transmitted through a third PUCCH resource of a nearest position after the first PUCCH resource.
5 . The method of claim 4 , wherein a HARQ process number related to the inter-device data is transmitted together with an acknowledge related to the inter-device data, by the first device to the base station.
6 . A first device comprising:
one or more processors;
one or more transceivers; and
one or more memories connected to the one or more processors and storing instructions,
wherein the instructions, based on being executed by the one or more processors, cause the first device to:
transmit information related to a time gap between a system frame number 0 related to Uu link and a direct frame number 0 related to inter-device link to a base station;
receive information related to a first physical uplink control channel (PUCCH) resource and information related to a time gap between an inter-device physical feedback channel and a PUCCH from the base station,
wherein the information related to the time gap between an inter-device physical feedback channel and a PUCCH is configured by the base station, based on the information related to the time gap between the system frame number 0 and the direct frame number 0;
transmit inter-device control information to a second device through an inter-device physical control channel;
transmit inter-device data, to the second device, through an inter-device physical shared channel related to the inter-device physical control channel;
determine an inter-device physical feedback channel resource, based on an index of a subchannel and an index of a slot related to the inter-device physical shared channel,
wherein the first device drops a transmission of a hybrid automatic repeat request (HARQ) feedback related to the inter-device data on the first PUCCH resource, based on a time gap between the determined inter-device physical feedback channel resource and the first PUCCH resource being smaller than the time gap between a inter-device physical feedback channel and a PUCCH;
receive information related to a second PUCCH resource, from the base station, based on the transmission of the HARQ feedback being dropped; and
transmit an acknowledgement related to the inter-device data to the base station, based on the second PUCCH resource,
wherein the information related to the time gap between the system frame number 0 and the direct frame number 0 is transmitted to the base station periodically with a pre-configured period.
7 . A processing device adapted to control a first device, the processing device comprising:
one or more processors; and
one or more memories connected to the one or more processors and storing instructions,
wherein the instructions, based on being executed by the one or more processors, cause the first device to:
transmit information related to a time gap between a system frame number 0 related to Uu link and a direct frame number 0 related to inter-device link to a base station;
receive information related to a first physical uplink control channel (PUCCH) resource and information related to a time gap between an inter-device physical feedback channel and a PUCCH from the base station,
wherein the information related to the time gap between an inter-device physical feedback channel and a PUCCH is configured by the base station, based on the information related to the time gap between the system frame number 0 and the direct frame number 0;
transmit inter-device control information to a second device through an inter-device physical control channel;
transmit inter-device data, to the second device, through an inter-device physical shared channel related to the inter-device physical control channel:
determine an inter-device physical feedback channel resource, based on an index of a subchannel and an index of a slot related to the inter-device physical shared channel,
wherein the first device drops a transmission of a hybrid automatic repeat request (HARQ) feedback related to the inter-device data on the first PUCCH resource, based on a time gap between the determined inter-device physical feedback channel resource and the first PUCCH resource being smaller than the time gap between a inter-device physical feedback channel and a PUCCH;
receive information related to a second PUCCH resource, from the base station, based on the transmission of the HARQ feedback being dropped; and
transmit an acknowledgement related to the inter-device data to the base station, based on the second PUCCH resource,
wherein the information related to the time gap between the system frame number 0 and the direct frame number 0 is transmitted to the base station periodically with a pre-configured period.