US 12,250,679 B2
Helper user equipment for retransmission of sidelink communications in a single-frequency network
Yisheng Xue, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Jing Sun, San Diego, CA (US); and Chih-Hao Liu, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jul. 28, 2021, as Appl. No. 17/443,880.
Prior Publication US 2023/0035313 A1, Feb. 2, 2023
Int. Cl. H04W 72/20 (2023.01); H04L 5/00 (2006.01); H04W 72/044 (2023.01); H04W 72/121 (2023.01); H04W 72/23 (2023.01); H04W 88/04 (2009.01)
CPC H04W 72/20 (2023.01) [H04L 5/0055 (2013.01); H04W 72/044 (2013.01); H04W 72/121 (2013.01); H04W 72/23 (2023.01); H04W 88/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a helper user equipment (UE), comprising:
receiving, from a base station, a signaling message requesting the helper UE to monitor a first time-frequency resource for a first transmission of a sidelink communication from a source UE to a destination UE and transmit a retransmission of the sidelink communication in a single-frequency network manner, wherein the sidelink communication is scheduled for transmission by the source UE to the destination UE that is different from the helper UE, wherein the signaling message indicates the first time-frequency resource and a second time-frequency resource corresponding to the retransmission of the sidelink communication, wherein the signaling message indicates a first resource for transmission of a first acknowledgement message from the helper UE to the base station if the helper UE receives the sidelink communication in the first time-frequency resource and further indicates a second resource for transmission of a second acknowledgement message from the helper UE to the base station if the helper UE receives an acknowledgement message from the destination UE indicating that the destination UE has received the sidelink communication;
receiving the first transmission of the sidelink communication to the destination UE, transmitted by the source UE to the destination UE, in the first time-frequency resource, based at least in part on receiving the signaling message;
transmitting the retransmission of the sidelink communication in the second time-frequency resource in the single-frequency network manner in response to receiving the first transmission; and
transmitting one or more of the first acknowledgement message or the second acknowledgement message.
 
12. A helper user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a base station, a signaling message requesting the helper UE to monitor a first time-frequency resource for a first transmission of sidelink communication from a source UE to a destination UE and transmit a retransmission of the sidelink communication in a single-frequency network manner, wherein the sidelink communication is scheduled for transmission by the source UE to the destination UE that is different from the helper UE, wherein the signaling message indicates the first time-frequency resource and a second time-frequency resource corresponding to the retransmission of the sidelink communication, wherein the signaling message indicates a first resource for transmission of a first acknowledgement message from the helper UE to the base station if the helper UE receives the sidelink communication in the first time-frequency resource and further indicates a second resource for transmission of a second acknowledgement message from the helper UE to the base station if the helper UE receives an acknowledgement message from the destination UE indicating that the destination UE has received the sidelink communication;
receive the first transmission of the sidelink communication to the destination UE, transmitted by the source UE to the destination UE, in the first time-frequency resource, based at least in part on receiving the signaling message;
transmit the retransmission of the sidelink communication in the second time-frequency resource in the single-frequency network manner in response to receiving the first transmission; and
transmit one or more of the first acknowledgement message or the second acknowledgement message.