Sidelink retransmission of messages
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a second user equipment (UE) may receive, from a network node, at least one message, the at least one message comprising at least one of a first common message directed to a first UE or a first private message directed to the first UE. The second UE may decode the at least one message. The second UE may receive, from the network node, a retransmission indication instructing the second UE to transmit, to the first UE, at least one retransmission of the at least one message. The second UE may transmit, to the first UE, the retransmission of the at least one message. Numerous other aspects are described.
1 . A second user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory and configured to cause the second UE to:
receive, from a network node, a plurality of messages, the plurality of messages comprising a common message and a private message directed to a first UE;
decode the plurality of messages;
receive, from the network node, a retransmission indication instructing the second UE to transmit, to the first UE, at least one retransmission of the plurality of messages; and
transmit, to the first UE, the at least one retransmission of the plurality of messages, wherein the common message is retransmitted in accordance with a first delay parameter and the private message is retransmitted in accordance with a second delay parameter, the first delay parameter and the second delay parameter based at least in part on a remaining packet delay budget.
2 . The second UE of claim 1 ,
wherein the one or more processors are further configured to cause the second UE to receive, from the network node, a sidelink resource allocation associated with a set of allocated sidelink resources, wherein the one or more processors, to cause the second UE to transmit the at least one retransmission of the plurality of messages, are configured to cause the second UE to transmit the at least one retransmission of the plurality of messages using the set of allocated sidelink resources.
3 . The second UE of claim 1 ,
wherein the one or more processors are further configured to cause the second UE to select a set of sidelink resources, wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the retransmission of the plurality of messages using the set of sidelink resources.
4 . The second UE of claim 1 ,
wherein the network node comprises at least one of a third UE or a programmable logic controller (PLC).
5 . The second UE of claim 4 ,
wherein the one or more processors are further configured to cause the second UE to:
transmit, to an additional network node, a sidelink resource allocation request; and
receive, from the additional network node, a sidelink resource allocation associated with a set of allocated sidelink resources, wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the retransmission of the plurality of messages using the set of allocated sidelink resources.
6 . The second UE of claim 4 ,
wherein the one or more processors are further configured to cause the second UE to receive, from the network node, a set of selected sidelink resources, wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the retransmission of the plurality of messages using the set of selected sidelink resources.
7 . The second UE of claim 4 ,
wherein the one or more processors are further configured to cause the second UE to receive, from the first UE, a set of selected sidelink resources, wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the retransmission of the plurality of messages using the set of selected sidelink resources.
8 . The second UE of claim 4 ,
wherein the one or more processors are further configured to cause the second UE to select a set of selected sidelink resources, wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the retransmission of the plurality of messages using the set of selected sidelink resources.
9 . The second UE of claim 1 ,
wherein at least one priority is associated with the plurality of messages.
10 . The second UE of claim 9 ,
wherein the at least one priority comprises a first priority associated with the common message and a second priority associated with the private message.
11 . The second UE of claim 9 ,
wherein the at least one priority comprises a joint priority associated with the first common message and the private message.
12 . The second UE of claim 9 ,
wherein the one or more processors are further configured to cause the UE to receive configuration information indicating the at least one priority.
13 . The second UE of claim 9 ,
wherein the at least one priority is associated with at least one of a mode 1 sidelink resource allocation operation or a mode 2 resource allocation operation.
14 . The second UE of claim 9 ,
wherein the one or more processors, to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit at least one of the first-common message or the private message based on the at least one priority.
15 . The second UE of claim 1 ,
wherein the one or more processors are further configured to cause the second UE to transmit a retransmission mode indication indicating that the at least one retransmission is to be transmitted by the second UE.
16 . The second UE of claim 15 ,
wherein the one or more processors, to cause the second UE to transmit the retransmission mode indication, are configured to cause the second UE to transmit the retransmission mode indication via a PC5 interface.
17 . The second UE of claim 1 ,
wherein the one or more processors, to cause the second UE to transmit the retransmission of the plurality of messages, are configured to cause the second UE to transmit the at least one retransmission based on a retransmission mode corresponding to the second UE, wherein the retransmission mode is based on at least one of a priority associated with the plurality of messages or a function of a remaining delay associated with the plurality of messages.
18 . The second UE of claim 17 ,
wherein the one or more processors are further configured to cause the second UE to transmit a retransmission mode indication indicating the priority.
19 . The second UE of claim 1 ,
wherein the one or more processors, to cause the second UE to transmit the at least one retransmission of the plurality of messages, are configured to cause the second UE to transmit the at least one retransmission based on at least one delay parameter.
20 . A first user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory and configured to cause the first UE to:
receive, from a first network node, a plurality of messages, the plurality of messages comprising a common message and a private message directed to the first UE; and
receive, from at least one of the first network node or a second network node and based on a failure, by the first UE, to decode the plurality of messages, at least one retransmission of the plurality of messages, wherein the common message is retransmitted in accordance with a first delay parameter and the private message is retransmitted in accordance with a second delay parameter, the first delay parameter and the second delay parameter based at least in part on a remaining packet delay budget.
21 . The first UE of claim 20 ,
wherein the one or more processors, to cause the first UE to receive the at least one retransmission of the plurality of messages, are configured to cause the first UE to:
receive, from the first network node, a first retransmission of the plurality of messages; and
receive, from the second network node, a second retransmission of the plurality of messages.
22 . The first UE of claim 21 ,
wherein the second network node comprises at least one of a second UE or a programmable logic controller (PLC).
23 . The first UE of claim 22 ,
wherein the one or more processors are further configured to cause the first UE to receive a retransmission mode indication indicating that the at least one retransmission is to be transmitted by the at least one of the first network node or the second network node.
24 . The first UE of claim 23 ,
wherein the one or more processors, to cause the first UE to receive the retransmission mode indication, are configured to cause the first UE to receive the retransmission mode indication via at least one of a PC5 interface or an access link.
25 . The first UE of claim 20 ,
wherein the one or more processors, to cause the first UE to receive the at least one retransmission of the plurality of messages, are configured to cause the first UE to receive the at least one retransmission based on a retransmission mode corresponding to the at least one of the first network node or the second network node, wherein the retransmission mode is based on at least one of a priority associated with the plurality of messages or a function of a remaining delay associated with the plurality of messages.
26 . A method of wireless communication performed by a second user equipment (UE), comprising:
receiving, from a network node, a plurality of messages, the plurality of messages comprising a common message and a first-private message directed to a first UE;
decoding the plurality of messages;
receiving, from the network node, a retransmission indication instructing the second UE to transmit, to the first UE, at least one retransmission of the plurality of messages; and
transmitting, to the first UE, the retransmission of the plurality of messages, wherein the common message is retransmitted in accordance with a first delay parameter and the private message is retransmitted in accordance with a second delay parameter, the first delay parameter and the second delay parameter based at least in part on a remaining packet delay budget.
27 . The method of claim 26 ,
wherein transmitting the at least one retransmission of the plurality of messages comprises transmitting the at least one retransmission based on a retransmission mode corresponding to the second UE, wherein the retransmission mode is based on at least one of a priority associated with the plurality of messages or a function of a remaining delay associated with the plurality of messages.
28 . A method of wireless communication performed by a first user equipment (UE), comprising:
receiving, from a first network node, a plurality of messages, the plurality of messages comprising a common message and a private message directed to the first UE; and
receiving, from at least one of the first network node or a second network node and based on a failure, by the first UE, to decode the plurality of messages, at least one retransmission of the plurality of messages, wherein the common message is retransmitted in accordance with a first delay parameter and the private message is retransmitted in accordance with a second delay parameter, the first delay parameter and the second delay parameter based at least in part on a remaining packet delay budget.
29 . The method of claim 28 , further comprising
receiving a retransmission mode indication indicating that the at least one retransmission is to be transmitted by the at least one of the first network node or the second network node.
30 . The method of claim 28 ,
wherein at least one priority is associated with the plurality of messages.