Triggering and Signaling of Inter-UE Coordination Message

Patent metadata

Field	Value
Publication number	US-2022322359-A1
Application number	US-202017438961-A
Country	US
Kind code	A1
Filing date	Oct 15, 2020
Priority date	Oct 15, 2020
Publication date	Oct 6, 2022
Grant date	—

Abstract

Apparatuses, systems, and methods for triggering and signaling of an inter-UE coordination message. A coordinating UE may determine to transmit, to a source UE, a set of resources for the source UE to use for sidelink communications. The determination may be based, at least in part, on an occurrence of at least one condition. The at least one condition may include the coordinating UE receiving a sidelink coordination request message form the source UE, the coordinating UE detecting a resource reservation collision between the source UE and a destination UE, and/or the coordinating UE detecting a half-duplex restriction at the source UE or the destination UE. The coordinating UE may transmit an inter-UE coordination message to the source UE. The inter-UE coordination message may include at least an indication of the set of resources.

First claim

1 . A first user equipment device (UE), comprising:
at least one antenna; at least one radio, wherein the at least one radio is configured to perform wireless communication using at least one radio access technology (RAT); one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications; and wherein the one or more processors are configured to cause the first UE to:
determine, based on an occurrence of at least one condition, to transmit, to a second UE, a set of resources for the second UE to use for sidelink communications; and
generate instructions to transmit, to the second UE, an inter-UE coordination message, wherein the inter-UE coordination message includes at least an indication of the set of resources.

2 . The first UE of claim 1 ,
wherein the at least one condition includes one or more of:
receiving, from the second UE, a sidelink coordination request message, wherein the inter-UE coordination message is transmitted in response to receiving the sidelink coordination message, and wherein the sidelink coordination request message includes at least one of:
a triggering signal that includes a single bit indicating triggering of the inter-UE coordination message; or
a multi-bit message indicating one or more criteria for selecting the set of resources;

detecting a resource reservation collision between the second UE and a third UE; or
detecting of a half-duplex restriction at the second UE or at a fourth UE.

3 . (canceled)

4 . The first UE of claim 2 ,
wherein the sidelink coordination request message is a triggering signal, and wherein prior to receiving the sidelink coordination request message, the one or more processors are further configured to cause the first UE to:
configure, with the second UE, criteria for selecting the set of resources and sidelink coordination request message resources, wherein the sidelink coordination request message resources include one or more symbols at an end of a time slot, wherein the one or more symbols are frequency division multiplexed with physical sidelink feedback channel (PSFCH) resources, and wherein the sidelink coordination request message resources are associated with an identifier (ID) of the first UE and an ID of the second UE; and
receive, from the second UE, the sidelink coordination request message based on the ID of the first UE and the ID of the second UE.

5 .- 8 . (canceled)

9 . The first UE of claim 2 ,
wherein the multi-bit message is received via a higher layer message transmitted in a physical sidelink shared channel (PSSCH) or a sidelink control information (SCI) stage 2 format; and wherein the one or more criteria for selecting the set of resources includes at least one of:
a time window for the inter-UE coordination message;
a time window for the set of resources;
a data priority associated with the set of resources;
a number of sub-channels of the set of resources;
a periodicity of the set of resources;
a cast type of the set of resources;
an identifier (ID) of the fourth UE; or
a format of the inter-UE coordination message, wherein the format of the inter-UE coordination message defines one or more of:
a resource map for selecting the set of resources;
preferred resources of the second UE;
non-preferred resources of the second UE; or
latency requirements for the inter-UE coordination message.

10 .- 12 . (canceled)

13 . The first UE of claim 2 ,
wherein the multi-bit message includes a list of pre-candidate resources for the first UE to recommend to the second UE; wherein the list of pre-candidate resources includes at least one of:
resources based on the second UE's resource selection; or
resources that are a superset of resources to be used by the second UE;
wherein the set of resources are a subset of the pre-candidate resources; and wherein the one or more processors are further configured to cause the first UE to:
measure the pre-candidate resources; and
select the subset of the pre-candidate resources based on the measurements.

14 .- 16 . (canceled)

17 . The first UE of claim 2 ,
wherein the resource reservation collision between the second UE and a third UE includes at least one of:
a collision of physical sidelink control channel (PSCCH) physical sidelink shared channel (PSSCH) resource reservations; or
a collision of physical sidelink feedback channel (PSFCH) resource reservations.

18 . The first UE of claim 2 ,
wherein the resource reservation collision includes at least one of a persistent resource collision or interference level from the third UE exceeding a threshold.

19 . The first UE of claim 2 ,
wherein, to detect the resource reservation collision between the second UE and the third UE, the one or more processors are further configured to cause the first UE to determine that a time gap between collided resource reservations and detection time is greater than a threshold, and wherein the threshold is greater than or equal to a response time of the second UE to change resource reservations after receipt of the inter-UE coordination message.

20 . (canceled)

21 . The first UE of claim 2 ,
wherein, to detect the half-duplex restriction at the second UE or the fourth UE, the one or more processors are further configured to cause the first UE to perform at least one of:
detecting that the second UE intends to transmit to the fourth UE during a time slot in which the fourth UE is unable to receive transmissions, that the second UE intends to transmit to the fourth UE during a time slot the second UE is scheduled to receive sideline data from a fifth UE, or the half-duplex restriction is on physical sidelink control channel (PSCCH)/physical sidelink shared channel (PSSCH) or on physical sidelink feedback channel (PSFCH); or
determining that a time gap between the half-duplex restriction and detection time is greater than a threshold, wherein the threshold is greater than or equal to a response time of the second UE to change resource reservations after receipt of the inter-UE coordination message

22 . (canceled)

23 . (canceled)

24 . The first UE of claim 1 ,
wherein the one or more processors are further configured to cause the first UE to:
determine a resource selection window for selecting resources for transmission of the inter-UE coordination message, wherein a packet delay budget associated with the resource selection window depends, at least in part, on a resource collision slot or a half-duplex restriction slot; and
to determine a data priority of the inter-UE coordination message, wherein the data priority is based, at least in part, on a data priority level included in a sidelink coordination request message received from the second UE, pre-configured per resource pool, configured per resource pool, or configured via PC 5 radio resource control signaling between the first UE and the second UE.

25 .- 28 . (canceled)

29 . An apparatus, comprising:
a memory; and at least one processor in communication with the memory, wherein the at least one processor is configured to:
determine, based on an occurrence of at least one condition, to transmit, to a source user equipment device (UE), a set of resources for the source UE to use for sidelink communications; and
generate instructions to transmit, to the source UE, an inter-UE coordination message, wherein the inter-UE coordination message includes at least an indication of the set of resour

Assignees

• Apple Inc

Inventors

• Ye Chunxuan
• Zeng Wei
• Zhang Dawei
• He Hong
• Sun Haitong
• Yang Weidong
• Oteri Oghenekome
• Ye Sigen
• Yao Chunhai
• Zhang Yushu
• Niu Huaning
• Tang Jia

Classifications

• H04W72/563 Primary

  of the wireless resources · CPC title

• H04W72/02 Primary

  Selection of wireless resources by user or terminal · CPC title

• H04W92/18

  between terminal devices · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W76/14

  Direct-mode setup · CPC title