US 11,388,663 B2 · Advanced V2X communication mechanism

Abstract

A method for sidelink data retransmission can include receiving a first negative acknowledgement (NACK) at a base station (BS) from a receiver user equipment (Rx UE). The NACK corresponds to an original transmission of sidelink data over a sidelink from a transmitter user equipment (Tx UE). The method can further include selecting one or both of the BS and the Tx UE to perform a first retransmission of the sidelink data to the Rx UE. A method of sidelink synchronization can include selecting at a UE a timing reference with a highest priority among available sidelink synchronization timing references according to a rule indicating timing references listed from high priority to low priority: gNB or eNB; UE directly synchronized to gNB or eNB; UE in directly synchronized to gNB or eNB; GNSS; UE directly synchronized to GNSS; UE indirectly synchronized to GNSS; and remaining UEs.

Claims18

Dependent claims

A method, comprising:

receiving a first negative acknowledgement (NACK) at a base station (BS) from a receiver user equipment (Rx UE), the NACK corresponding to an original transmission of sidelink data over a sidelink from a transmitter user equipment (Tx UE);
selecting one or both of the BS and the Tx UE to perform a first retransmission of the sidelink data to the Rx UE;
when the BS is selected to perform the first retransmission of the sidelink data to the Rx UE, transmitting the sidelink data to the Rx UE from the BS;
and
when the Tx UE is selected to perform the first retransmission of the sidelink data to the Rx UE, transmitting a first sidelink grant from the BS to the Tx UE for the first retransmission of the sidelink data to the Rx UE.

2 more elements

Dependencies are inferred from the claim text.

Advanced V2X communication mechanism

Life of this patent

Advanced V2X communication mechanism

Life of this patent

Abstract

Claims18