US 11,695,531 B2Granted

Resources selection for feedback based NR-V2X communication

AssigneeIntel Corporation

InventorsAlexey Khoryaev, Sergey Panteleev, Mikhail Shilov, Andrey Chervyakov

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Abstract

Devices and systems of sensing, resource selection and control signaling for feedback-less and feedback-based NR-V2X sidelink communication are described. Resource reservation and selection for sidelink retransmissions based on HARQ feedback are described for unicast, groupcast, and broadcast blind retransmissions. After exchanging HARQ feedback capability information for different types of communications, a HARQ-dependent or HARQ-independent resource selection occurs. Look-ahead and/or chain-based resource selection and reservation signaling is used, in which a single resource or some or all of the resources selected are signaled as reserved. Further resource selection of a single additional resource may occur after an initial resource selection. The resource selection for retransmissions may be adapted using a RSRP or distance threshold.

Claims9

Dependent claims

An apparatus of a user equipment (UE), the apparatus comprising:

processing circuitry configured to:
encode a sidelink transmission for transmission to another UE using one of sidelink resources reserved for vehicle-to-everything (V2X) sidelink transmissions;
decode, from the other UE, Hybrid Automatic Repeat reQuest (HARQ) feedback in response to the sidelink transmission;
and
encode, in response to a determination that a retransmission of the sidelink transmission is to be sent based on the HARQ feedback, the retransmission for transmission using another of the sidelink resources;
and
a memory configured to store the sidelink resources,
wherein the processing circuitry is further configured to:
determine a set of candidate resources for potential sidelink transmission of a transport block (TB);
select a subset of resources from the set of candidate resources for sidelink transmissions of the TB;
encode, for transmission to the other UE, control channel signalling indicating resources for potential retransmissions of the TB and a request for the HARQ feedback;
reserve up to two resources from the subset of resources through encoded Sidelink Control Information (SCI) signaling transmitted on a previously reserved resource or on a resource selected for an initial transmission of the TB;
and
release the up to two sidelink resources in response to reception of HARQ ACK feedback.

11 more elements

A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE), the one or more processors to configure the UE to, when the instructions are executed:

select sidelink resources reserved for vehicle-to-everything (V2X) sidelink transmissions and V2X sidelink retransmissions;
send, to another UE, a first Physical Sidelink Control Channel (PSCCH) and a first Physical Sidelink Shared Channel (PSSCH) using a first sidelink resource of the sidelink resources, the PSSCH comprising a sidelink transmission, the first PSCCH indicating a set of the sidelink resources that includes a second sidelink resource of the sidelink resources;
receive, from the other UE in response to a V2X sidelink transmission, Hybrid Automatic Repeat reQuest (HARQ) feedback on a first Physical Sidelink Feedback Control Channel (PSFCH) indicated by the first PSCCH, the HARQ feedback indicating unsuccessful reception of the V2X sidelink transmission;
determine, based on the HARQ feedback, that a V2X sidelink retransmission of the V2X sidelink transmission is to be sent to the other UE;
send to the other UE on the second sidelink resource, in response to a determination that the retransmission is to be sent, a second PSSCH comprising the V2X sidelink retransmission;
and
receive, from the other UE in response to the V2X retransmission, HARQ feedback on a second PSFCH indicated by the first PSCCH, the HARQ feedback on the second PSFCH comprising the HARQ feedback for the V2X sidelink transmission and HARQ feedback indicating successful or unsuccessful reception of the V2X sidelink retransmission, a periodicity of PSFCH resources being selected from among 1, 2, and 4 slots such that the first and second PSFCH are separated by 1, 2, or 4 slots, respectively.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/825,058Filed 20 Mar 2020 · us provisional application
Priority: 2 May 2019
Published: US 2020/0220694 A19 Jul 2020
Granted: 4 Jul 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04L 1/1854
Arrangements specially adapted for the receiver end: scheduling and prioritising arrangements
H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK
H04L 1/1816
Hybrid protocols; Hybrid automatic repeat request [HARQ]: with retransmission of the same, encoded, message
H04L 1/1893
Arrangements specially adapted for the transmitter end: physical mapping arrangements