US 11,695,516 B2 · Method and apparatus for handling device-to-device feedback in a wireless communication system

Abstract

In an example, a second UE receives a first SCI and a second SCI from a first UE in a first slot. A groupcast sidelink transmission is scheduled by the first SCI and the second SCI. The second SCI indicates a location indication, associated with a location of the first UE, and a communication range. A PSFCH resource is determined based upon the first SCI. The second UE doesn't transmit a NACK indication on the PSFCH resource if location information of the second UE is available, the groupcast sidelink transmission isn't successfully decoded, and the second UE is outside the communication range. The second UE transmits the NACK indication on the PSFCH resource if the location information isn't available and the groupcast sidelink transmission isn't successfully decoded, or if the location information is available, the groupcast sidelink transmission isn't successfully decoded, and the second UE is within the communication range.

A method of a second User Equipment (UE) for performing Hybrid Automatic Repeat Request (HARQ) feedback in response to one or more groupcast sidelink transmissions for a group, the method comprising:

receiving, in a first slot, a first first-stage sidelink control information (SCI) and a first second-stage SCI from a first UE, wherein:
a first groupcast sidelink transmission is scheduled by the first first-stage SCI and the first second-stage SCI;
and
the first second-stage SCI is indicative of a first location indication, associated with a first location of the first UE, a first communication range, and first granularity information for at least one of interpreting or processing the first location of the first UE, wherein the first location indication comprises a ZONE ID of the first UE;
determining a first Physical Sidelink Feedback Channel (PSFCH) resource based upon the first first-stage SCI;
if a first location information of the second UE is available to the second UE, determining, by the second UE, whether to transmit a non-acknowledgement (NACK) indication on the first PSFCH resource based upon a combination of:
whether the first groupcast sidelink transmission is not successfully decoded;
and
whether the second UE is within the first communication range from the first UE;
not transmitting the NACK indication on the first PSFCH resource responsive to determining that the first location information of the second UE is available to the second UE, the first groupcast sidelink transmission is not successfully decoded, and the second UE is outside the first communication range from the first UE;
receiving, in a second slot, a second first-stage SCI and a second second-stage SCI from the first UE, wherein:
a second groupcast sidelink transmission is scheduled by the second first-stage SCI and the second second-stage SCI;
and
the second second-stage SCI is indicative of a second location indication, associated with a second location of the first UE, a second communication range, and second granularity information for at least one of interpreting or processing the second location of the first UE, wherein the second location indication comprises a ZONE ID of the first UE;
determining a second PSFCH resource based upon the second first-stage SCI;
if a second location information of the second UE is not available to the second UE, determining, by the second UE, whether to transmit a second NACK indication on the second PSFCH resource based upon whether the second groupcast sidelink transmission is not successfully decoded;
transmitting the second NACK indication on the second PSFCH resource responsive to determining that the second location information of the second UE is not available to the second UE and the second groupcast sidelink transmission is not successfully decoded;
receiving, in a third slot, a third first-stage SCI and a third second-stage SCI from the first UE, wherein:
a third groupcast sidelink transmission is scheduled by the third first-stage SCI and the third second-stage SCI;
and
the third second-stage SCI is indicative of a third location indication, associated with a third location of the first UE, a third communication range, and third granularity information for at least one of interpreting or processing the third location of the first UE, wherein the third location indication comprises a ZONE ID of the first UE;
determining a third PSFCH resource based upon the third first-stage SCI;
if a third location information of the second UE is available to the second UE, determining, by the second UE, whether to transmit a third NACK indication on the third PSFCH resource based upon a combination of:
whether the third groupcast sidelink transmission is not successfully decoded;
and
whether the second UE is within the third communication range from the first UE;
and
transmitting the third NACK indication on the third PSFCH resource responsive to determining that the third location information of the second UE is available to the second UE, the third groupcast sidelink transmission is not successfully decoded, and the second UE is within the third communication range from the first UE.

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Method and apparatus for handling device-to-device feedback in a wireless communication system

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Method and apparatus for handling device-to-device feedback in a wireless communication system

Life of this patent

Abstract

Claims22