KR-20260066726-A - Configuration and display of sidelink feedback resources, and associated devices and methods

KR20260066726AKR 20260066726 AKR20260066726 AKR 20260066726AKR-20260066726-A

Abstract

Devices, systems, and methods for configuring and representing sidelink resources for a shared or unlicensed frequency band include configuring PSFCH resource sets using frequency interlacs of one or more PRBs. A first wireless communication device may transmit a plurality of sidelink PRB bitmaps, each associated with a PSFCH occupation or candidate. Each bit of a bitmap may represent one PRB in a configured resource pool. PSFCH resource sets may be partitioned by indexing PRBs according to an interlaced-first indexing sequence and selecting consecutive subsets of indices to form PSFCH resource sets.

Inventors

류 치-하오
키스치 조반니
장 샤오샤
순 징

Assignees

퀄컴 인코포레이티드

Dates

Publication Date: 20260512
Application Date: 20240911
Priority Date: 20240910

Claims (20)

A wireless communication method performed by a first user device (UE), A step of receiving a first PSFCH configuration including a first bitmap representing a first set of dedicated resource blocks (RBs) for a first PSFCH candidate among a plurality of consecutive physical sidelink feedback channel (PSFCH) candidates, wherein each PSFCH candidate among the plurality of consecutive PSFCH candidates is associated with one or more of a first sidelink data transmission or a sidelink control channel transmission; For a second PSFCH candidate among the plurality of consecutive PSFCH candidates, the step of receiving a second PSFCH configuration including a second bitmap displaying a second dedicated RB set, wherein the second dedicated RB set does not overlap with the first dedicated RB set in the frequency domain; and A wireless communication method performed by a first user device, comprising the step of transmitting a PSFCH signal based on the selection of one of the first PSFCH candidate or the second PSFCH candidate.
A wireless communication method performed by a first user device, wherein, in claim 1, the first bitmap comprises a plurality of bits, and each bit of the plurality of bits represents one RB in a PSFCH resource pool.
A wireless communication method performed by a first user device, wherein, in paragraph 2, at least a first bit among the plurality of bits is associated with the first dedicated RB set, and at least a second bit among the plurality of bits is associated with the second dedicated RB set.
A wireless communication method performed by a first user device, wherein, in claim 1, the step of receiving the first PSFCH configuration includes the step of receiving a first wireless resource control (RRC) communication, and the step of receiving the second PSFCH configuration includes the step of receiving a second RRC communication.
A wireless communication method performed by a first user device, wherein, in claim 1, the first RB set and the second RB set are in a shared frequency band, the first dedicated RB set is associated with at least the first RB in a first frequency interlacing of the RBs, and the second dedicated RB set is associated with at least the second RB in the first frequency interlacing of the RBs.
In paragraph 5, The first frequency interlacing of the RBs comprises a first plurality of RBs indexed by a first subset of sequential indices; The second frequency interlacing of the RBs includes a second plurality of RBs indexed by a second subset of sequential indices; and A wireless communication method performed by a first user device, wherein the second subset of the above sequential indices is continuous with and subsequent to the first subset of the above sequential indices.
In paragraph 6, The first PSFCH candidate is associated with a first plurality of sequentially indexed RBs in the first frequency interlacing of the RBs; and A wireless communication method performed by a first user device, wherein the second PSFCH candidate is associated with a second plurality of sequentially indexed RBs in the first frequency interlacing of the RBs.
In claim 6, the wireless communication method performed by the first user equipment, wherein the first dedicated RB set is associated with a configured starting RB index within the PSFCH resource pool and a quantity of RBs.
As a wireless communication method performed by a network unit, A step of transmitting a first PSFCH configuration including a first bitmap representing a first set of dedicated resource blocks (RBs) for a first PSFCH candidate among a plurality of consecutive physical sidelink feedback channel (PSFCH) candidates, wherein each PSFCH candidate among the plurality of consecutive PSFCH candidates is associated with one or more of a first sidelink data transmission or a sidelink control channel transmission; and A wireless communication method performed by a network unit, comprising the step of transmitting a second PSFCH configuration including a second bitmap indicating a second dedicated RB set for a second PSFCH candidate among a plurality of consecutive PSFCH candidates, wherein the second dedicated RB set does not overlap with the first dedicated RB set in the frequency domain.
A wireless communication method performed by a network unit, wherein, in claim 9, the first bitmap comprises a plurality of bits, and each bit of the plurality of bits represents one RB in a PSFCH resource pool.
A wireless communication method performed by a network unit, wherein, in paragraph 10, at least one bit among the plurality of bits is associated with the first dedicated RB set, and at least two bits among the plurality of bits are associated with the second dedicated RB set.
A wireless communication method performed by a network unit, wherein, in claim 9, the step of transmitting the first PSFCH configuration includes the step of transmitting a first wireless resource control (RRC) communication, and the step of transmitting the second PSFCH configuration includes the step of transmitting a second RRC communication.
A wireless communication method performed by a network unit, wherein, in claim 9, the first RB set and the second RB set are in a shared frequency band, the first dedicated RB set is associated with at least the first RB in a first frequency interlacing of the RBs, and the second dedicated RB set is associated with at least the second RB in the first frequency interlacing of the RBs.
In Paragraph 13, A step of indexing a first plurality of RBs in the first frequency interlacing of the RBs into a first subset of sequential indices; and The method further includes the step of indexing a second plurality of RBs in a second frequency interlacing of RBs into a second subset of sequential indices, A wireless communication method performed by a network unit, wherein the second subset of the above sequential indices is continuous with and subsequent to the first subset of the above sequential indices.
In claim 14, the step of transmitting the first PSFCH configuration is a wireless communication method performed by a network unit based on the indexing of the first plurality of RBs and the indexing of the second plurality of RBs.
In Paragraph 14, The first PSFCH candidate is associated with a first plurality of sequentially indexed RBs in the first frequency interlacing of the RBs; and A wireless communication method performed by a network unit, wherein the second PSFCH candidate is associated with a second plurality of sequentially indexed RBs in the first frequency interlacing of the RBs.
In paragraph 14, the above-mentioned first dedicated RB set is associated with a configured starting RB index within a PSFCH resource pool and a quantity of RBs, a wireless communication method performed by a network unit.
As a device, One or more memories; and The device comprises one or more processors configured to communicate with the one or more memories and execute instructions on the one or more memories, and the instructions cause the device: For a first PSFCH candidate among a plurality of consecutive physical sidelink feedback channel (PSFCH) candidates, the first PSFCH configuration including a first bitmap representing a first dedicated resource block (RB) set is received, wherein each PSFCH candidate among the plurality of consecutive PSFCH candidates is associated with one or more of a first sidelink data transmission or a sidelink control channel transmission; For a second PSFCH candidate among the plurality of consecutive PSFCH candidates, receiving a second PSFCH configuration including a second bitmap displaying a second dedicated RB set, wherein the second dedicated RB set does not overlap with the first dedicated RB set in the frequency domain; and A device for transmitting a PSFCH signal based on the selection of one of the first PSFCH candidate or the second PSFCH candidate.
A device according to claim 18, wherein the first bitmap comprises a plurality of bits, and each bit of the plurality of bits represents one RB in a PSFCH resource pool.
A device according to claim 19, wherein at least one bit of the plurality of bits is associated with the first dedicated RB set, and at least two bits of the plurality of bits are associated with the second dedicated RB set.

Description

Configuration and display of sidelink feedback resources, and associated devices and methods Cross-reference regarding related applications This application claims the benefit and priority of U.S. Provisional Application No. 63/584,845 filed September 22, 2023, and U.S. Regular Application No. 18/830,216 filed September 10, 2024, the entire contents of which are incorporated herein by reference. Technology field The present application relates to wireless communication systems, and more specifically to improving sidelink communication with NR (New Radio) devices. Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcast. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system may include multiple base stations (BS), each of which simultaneously supports communication with multiple communication devices, which may also be known as User Equipment (UE). Sidelinks were introduced to allow UEs to transmit data to other UEs without tunneling through a BS or associated core network. Sidelink techniques have been extended to provision device-to-device (D2D) communications, vehicle-to-everything (V2X) communications, and cellular vehicle-to-everything (C-V2X) communications. Similarly, NR can be extended to support sidelink communications for D2D, V2X, or C-V2X over dedicated spectrum, licensed spectrum, or unlicensed spectrum. In existing systems, sidelink communications may include Physical Sidelink Feedback Channel (PSFCH) communications between UEs. These communications may be performed with individual messages containing one or more resource blocks via one or more symbols. In some examples, PSFCH resources may be distributed across a wider set of frequency resources to meet occupied bandwidth specifications. For instance, PSFCH resources may be distributed across a wider set of frequency resources in shared frequency bands or unlicensed frequency bands. In some examples, multiple UEs may share portions of unlicensed bands, which can complicate the configuration of PSFCH resources. The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not a comprehensive overview of all the features considered of the present disclosure, nor is it intended to identify the essential or important elements of all aspects of the present disclosure or to describe the scope of any or all aspects of the present disclosure. The sole purpose of this summary is to present some concepts of one or more aspects of the present disclosure in a summary form as an introduction to the more detailed description to be provided later. Aspects of the present disclosure describe methods and mechanisms for configuring and indicating sidelink feedback resources. In some examples, a UE may be configured to use portions of the same sidelink resource pool for PSFCH transmissions to provide ACK/NACK feedback. In some examples, a UE attempting to access unlicensed frequency resources (e.g., during Channel Occupancy Time (COT)) may not know exactly at what time the UE will be able to use the frequency resources. For example, channel access procedures may vary in the amount of time based on the measurements obtained by the UE. Therefore, the UE may be configured with a number of consecutive PSFCH candidates or opportunities to enable the UE to acquire PSFCH resources even if there is uncertainty regarding the timing of the UE acquiring access to unlicensed resources. It is desirable for the UE and the network to use a PSFCH configuration mechanism that allows for such timing flexibility, particularly when the number of consecutive PSFCH candidates are not associated with the same set of frequency resources. The methods and mechanisms described herein include one or more of generating, transmitting, receiving, or decoding bitmaps representing sets of PSFCH resources corresponding to a plurality of PSFCH candidates. In one embodiment, a UE may be configured to receive one bitmap for each of a plurality of PSFCH candidates, wherein the plurality of PSFCH candidates are associated with one or more of the same sidelink data or sidelink control channels (e.g., Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), etc.). Bitmaps may be provided such that each bit of the bitmap is associated with one PRB in the sidelink resource pool. A plurality of bitmaps may represent corresponding sets of PRBs, wherein each set of PRBs does not overlap with the sets of PRBs of other bitmaps. Each set of PRBs may be associated with an individual PSFCH candidate. In another embodiment, each PRB set may be divided, segmented, or partitioned by indexing PRBs according to an indexing sequence and selecting consecutive subsets of indices to grou