Highly reliable hybrid automatic repeat request technologies for new radio sidelink
The disclosed subject matter is directed towards highly reliable Hybrid Automatic Repeat Request (HARQ) retransmission procedures, including to provide different levels of reliability for Sidelink transmissions. A scheduler node schedule a data transmission by a transmitter node, and can receive (and store) the data packet transmission. If the scheduler node receives a negative acknowledgement (NAK) from the receiver node, the scheduler node can allocate resources to the transmitter node to perform a retransmission of the data packet, and/or retransmit a copy of the data packet from the scheduler node to the receiver node. The scheduler node can inform the receiver node that a retransmission is being sent by the transmitter node and the scheduler node.
1. A method, comprising:
receiving, by a scheduler node comprising a processor, a transmission of a data packet from a transmitter node to a receiver node;
storing, by the scheduler node, the data packet; and
in response to receiving a negative acknowledgment from the receiver node corresponding to the transmission of the data packet, causing, by the scheduler node, a retransmission of the data packet to the receiver node, wherein the causing comprises:
in response to determining that the transmitter node is to retransmit the data packet, scheduling the transmitter node to perform the retransmission, and
in response to determining that the scheduler node is to retransmit the data packet, retransmitting the data packet from the scheduler node.
2. The method of claim 1 , further comprising determining, by the scheduler node, that the transmitter node and the scheduler node are to retransmit the data packet.
3. The method of claim 2 , wherein causing the retransmission of the data packet comprises scheduling the transmitter node to perform the retransmission, and retransmitting the data packet from the scheduler node.
4. The method of claim 2 , further comprising sending, by the scheduler node to the receiver node, control signal information that informs the receiver node that the retransmission of the data packet is to be performed by the transmitter node and the scheduler node.
5. The method of claim 2 , wherein causing the retransmission of the data packet comprises facilitating retransmitting the data packet from the scheduler node and the transmitter node concurrently.
6. The method of claim 1 , further comprising determining, by the scheduler node, whether to retransmit the data packet from at least one of the transmitter node or the scheduler node based on at least one of quality of service information, signal quality information, or a latency requirement.
7. The method of claim 1 , wherein the transmitter node is a first transmitter node, and wherein causing the retransmission of the data packet comprises allocating resources for a second transmitter node to perform the retransmission.
8. A local manager user equipment, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising:
receiving a transmission of a data packet from a transmitter user equipment to a receiver user equipment;
storing the data packet; and
in response to receiving a negative acknowledgment from the receiver user equipment corresponding to the transmission of the data packet, facilitating a retransmission of the data packet to the receiver user equipment, wherein the facilitating comprises:
in response to determining that the transmitter user equipment is to retransmit the data packet, scheduling the transmitter user equipment to perform the retransmission, and
in response to determining that the local manager user equipment is to retransmit the data packet, retransmitting the data packet from the local manager user equipment.
9. The local manager user equipment of claim 8 , wherein the operations further comprise determining that the transmitter user equipment and the local manager user equipment are to retransmit the data packet.
10. The local manager user equipment of claim 9 , wherein facilitating the retransmission of the data packet comprises scheduling the transmitter user equipment to perform the retransmission, and retransmitting the data packet from the local manager user equipment.
11. The local manager user equipment of claim 9 , wherein the operations further comprise sending, to the receiver user equipment, control signal information that informs the receiver user equipment that the retransmission of the data packet is to be performed by the transmitter node and the local manager user equipment.
12. The local manager user equipment of claim 9 , wherein facilitating the retransmission of the data packet comprises facilitating retransmitting the data packet from the local manager user equipment and the transmitter user equipment at substantially the same time.
13. The local manager user equipment of claim 8 , wherein the operations further comprise determining whether to retransmit the data packet from at least one of the transmitter user equipment or the local manager user equipment based on at least one of quality of service information, signal quality information, or a latency requirement.
14. The local manager user equipment of claim 8 , wherein the transmitter user equipment is a first transmitter user equipment, and wherein causing the retransmission of the data packet comprises allocating resources for a second transmitter user equipment to perform the retransmission.
15. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a scheduler user equipment, facilitate performance of operations, the operations comprising:
receiving a transmission of a data packet from a transmitting user equipment to a receiving user equipment;
storing the data packet; and
in response to receiving a negative acknowledgment from the receiving user equipment corresponding to the transmission of the data packet, facilitating a retransmission of the data packet to the receiving user equipment, wherein the facilitating comprises:
in response to determining that the transmitting user equipment is to retransmit the data packet, scheduling the transmitting user equipment to perform the retransmission, and
in response to determining that the local manager user equipment is to retransmit the data packet, retransmitting the data packet from the scheduler user equipment.
16. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise determining that the transmitting user equipment and the scheduler user equipment are to retransmit the data packet.
17. The non-transitory machine-readable medium of claim 16 , wherein facilitating the retransmission of the data packet comprises scheduling the transmitting user equipment to perform the retransmission, and retransmitting the data packet from the scheduler user equipment.
18. The non-transitory machine-readable medium of claim 16 , wherein the operations further comprise sending, to the receiving user equipment, control signal information that informs the receiving user equipment that the retransmission of the data packet is to be performed by the transmitter node and the scheduler user equipment.
19. The non-transitory machine-readable medium of claim 16 , wherein facilitating the retransmission of the data packet comprises facilitating retransmitting the data packet from the scheduling user equipment and the transmitting user equipment concurrently.
20. The non-transitory machine-readable medium of claim 15 , wherein the operations further comprise determining whether to retransmit the data packet from at least one of the transmitting user equipment or the scheduler user equipment based on at least one of quality of service information, signal quality information, or a latency requirement.