Distributed sidelink resource allocation

Patent metadata

Field	Value
Publication number	US-2023413238-A1
Application number	US-202318366337-A
Country	US
Kind code	A1
Filing date	Aug 7, 2023
Priority date	Nov 26, 2019
Publication date	Dec 21, 2023
Grant date	—

Abstract

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for determining shared resources associated with one or more user equipments (UEs) for sidelink communications, including control resources and data resources. A first UE may transmit a sidelink request to reserve a subset of data resources to a second UE, and may monitor for one or more sidelink responses indicating a positive sidelink response to the sidelink request, a negative sidelink response to the sidelink request, or both. The second UE may transmit a positive sidelink response if it is available for a data transmission. A third UE may transmit a negative sidelink response if it objects to the data transmission. The first UE may determine, based on monitoring for the one or more sidelink responses, whether to transmit a sidelink confirmation indicating a reservation of the subset of the data resources to the second UE.

First claim

What is claimed is:

1 . A first user equipment (UE), comprising:
a processing system that includes processor circuitry and memory circuitry that stores code, the processing system configured to cause the first UE to:
monitor, on a receive beam over control resources in a first portion of a slot, for a sidelink request to reserve a subset of data resources from a second user equipment (UE), the control resources and data resources included in shared resources for communicating over one or more sidelink communication links;
receive, in accordance with the monitoring, the sidelink request from a second UE, the sidelink request indicating that the first UE is a target UE of the sidelink request; and
determine, in accordance with receiving the sidelink request, whether to transmit a sidelink response to the second UE on a transmission beam over control resources in a second portion of the slot.

2 . The first UE of claim 1 , wherein the processing system is further configured to cause the first UE to:
transmit, in accordance with determining whether to transmit the sidelink response, the sidelink response to the second UE on the transmission beam over the control resources in the second portion of the slot; receive, on a second receive beam over control resources in a first portion of a second slot, a second sidelink request to reserve the subset of the data resources from a third UE; and determine, in accordance with receiving the second sidelink request on the second receive beam, a level of interference between a transmission from the third UE on the second receive beam and a transmission from the second UE on the receive beam.

3 . The first UE of claim 2 , wherein the processing system is further configured to cause the first UE to transmit, in accordance with determining the level of interference between the transmission from the third UE on the second receive beam and the transmission from the second UE on the receive beam, the sidelink response to the second UE on the transmission beam over the control resources in the second portion of the slot, the sidelink response comprising a positive sidelink response.

4 . The first UE of claim 2 , wherein the processing system is further configured to cause the first UE to transmit, in accordance with the level of interference between the transmission from the third UE on the second receive beam and the transmission from the second UE on the receive beam, a second sidelink response to the third UE on a second transmission beam over control resources in a second portion of the second slot, the second sidelink response indicating a negative sidelink response.

5 . The first UE of claim 1 , wherein the processing system is further configured to cause the first UE to:
receive, on the receive beam over control resources in a first portion of a second slot, a second sidelink request to reserve the subset of the data resources from a third UE; transmit, to the third UE on the transmission beam over control resources in a second portion of the second slot, a second sidelink response comprising a positive sidelink response; receive, in accordance with the second sidelink response, a first sidelink confirmation indicating a reservation of the subset of the data resources on the receive beam over control resources in a third portion of the second slot, wherein monitoring for the sidelink request on the receive beam is in accordance with receiving the first sidelink confirmation; determine, in accordance with receiving the sidelink request and the second sidelink request, that the first UE is not available for a data transmission using the subset of the data resources from the second UE, wherein determining whether to transmit the sidelink response to the second UE one the transmission beam is in accordance with determining that the first UE is not available for the data transmission; and refrain, in accordance with determining that the first UE is not available for the data transmission using the subset of the data resources from the second UE, from transmitting the sidelink response to the second UE on the transmission beam over the control resources in the second portion of the slot.

6 . The first UE of claim 5 , wherein the processing system is further configured to cause the first UE to:
monitor, on the receive beam over control resources in a third portion of the slot, for a second sidelink confirmation from the second UE; determine, in accordance with monitoring for the second sidelink confirmation, that the second UE has not transmitted the second sidelink confirmation; and receive, in accordance with determining that the second UE has not transmitted the second sidelink confirmation, a data transmission from the third UE on the receive beam over the subset of the data resources.

7 . The first UE of claim 1 , wherein the processing system is further configured to cause the first UE to:
receive a first sidelink confirmation indicating a reservation of the subset of the data resources transmitted from a third UE to a fourth UE on the transmission beam over control resources in a third portion of a second slot; determine, in accordance with receiving the first sidelink confirmation, that the subset of the data resources is not available for a data transmission to the first UE using the transmission beam, wherein determining whether to transmit the sidelink response to the second UE is in accordance with determining that the subset of the data resources is not available; and transmit, in accordance with determining that the subset of the data resources is not available for the data transmission to the first UE using the transmission beam, a negative sidelink response to the second UE.

8 . The first UE of claim 1 , wherein the processing system is further configured to cause the first UE to determine that the control resources in the first portion of the slot are allocated for sending the sidelink request by the second UE, wherein monitoring for the sidelink request over the control resources in the first portion of the slot is in accordance with the control resources in the first portion of the slot being allocated for sending the sidelink request by the second UE.

9 . The first UE of claim 8 , wherein the processing system is further configured to cause the first UE to receive, from a base station, a control resource allocation indicating that one or more slots in the control resources are allocated to a set of UEs for reserving the data resources, wherein the set of UEs comprises the second UE and the first UE, wherein determining that the control resources in the first portion of the slot are allocated for sending the sidelink request by the second UE is in accordance with the control resource allocation.

10 . The first UE of claim 8 , wherein the processing system is further configured to cause the first UE to compare a UE identifier of the first UE to one or more UE identifiers of a set of UEs comprising the second UE and the first UE, wherein determining that the control resources in the first portion of the slot are allocated for sending the sidelink request by the second UE is in accordance with the comparing.

11 . The first UE of claim 8 , wherein the processing system is further configured to cause the first UE to determine a rotating schedule for slot allocation, wherein determining that the control resources in the first portion of the slot are allocated for sending the sidelink request by the second UE is in accordance with the rotating schedule.

12 . The first UE of claim 8 , wherein the processing system is further configured to cause the first UE to determine a preconfigured slot allocation assi

Assignees

• Qualcomm Inc

Inventors

• Ryu Jung Ho
• Akkarakaran Sony
• Li Junyi
• Luo Tao
• Damnjanovic Jelena
• Gulati Kapil
• Montojo Juan
• Ding Ling
• Taherzadeh Boroujeni Mahmoud
• Cheng Hong
• Bao Jingchao

Classifications

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04W28/26

  Resource reservation · CPC title

• H04W92/18

  between terminal devices · CPC title

• H04W76/23 Primary

  Manipulation of direct-mode connections · CPC title

• H04B7/0617

  for beam forming · CPC title