US-12621113-B2 - Sidelink interlace configuration

US12621113B2US 12621113 B2US12621113 B2US 12621113B2US-12621113-B2

Abstract

Apparatuses, methods, and systems are disclosed for interlacing sidelink resources. One apparatus includes a transceiver and a processor that receives a resource pool configuration that indicates a subchannel size and resource pool time-frequency configuration for an unlicensed sidelink carrier and receives a corresponding interlacing configuration that indicates: the number of frequency resources per interlace based on the subchannel size, the spacing between the interlace based on the subchannel size, the minimum amount of resource to be used for transmission in a resource pool, and the type of interlacing to be performed. The transceiver transmits a sidelink channel according to the interlacing configuration within the unlicensed sidelink carrier.

Inventors

Karthikeyan Ganesan
Alexander Golitschek Edler Von Elbwart
Vijay Nangia
Ankit BHAMRI
Ali RAMADAN ALI
Robin Thomas

Assignees

LENOVO (SINGAPORE) PTE. LTD.

Dates

Publication Date: 20260505
Application Date: 20211029

Claims (18)

1 . A User Equipment (“UE”) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a resource pool configuration for sidelink, wherein the resource pool configuration indicates a resource pool comprising a plurality of physical resource blocks (“PRBs”) corresponding to a Listen-Before-Talk (“LBT”) subband, each PRB comprising a set of subcarriers; receive an interlacing configuration associated with the resource pool configuration, wherein the interlacing configuration indicates a set of subchannels within the resource pool and a number of interlaces for each subchannel of the set of subchannels, and wherein the number of interlaces is based at least in part on a subcarrier spacing of the resource pool; determine an interlacing scheme based at least in part on the interlacing configuration and the resource pool, wherein the interlacing scheme comprises a plurality of PRB-level interlacing schemes, wherein a respective PRB-level interlacing scheme is determined within each subchannel of the set of subchannels, wherein the interlacing scheme corresponds to a set of non-contiguous PRBs distributed across each subchannel of the set of subchannels, and wherein each subchannel comprises a plurality of interleaved PRBs that satisfies a minimum occupied bandwidth; and transmit a sidelink transmission over a sidelink channel according to the interlacing scheme, the sidelink channel comprising a sidelink data channel or a sidelink control channel.
2 . The UE of claim 1 , wherein the resource pool configuration indicates a subchannel size, wherein a resource pool size is not a multiple of the subchannel size, and wherein the interlacing configuration further indicates a bitmap of remaining PRBs.
3 . The UE of claim 2 , wherein a set of remaining PRBs are configured as empty PRBs in a middle of the resource pool.
4 . The UE of claim 2 , wherein a set of remaining PRBs are allocated to at least one subchannel having a second subchannel size different than the subchannel size indicated in the resource pool configuration.
5 . The UE of claim 1 , wherein the interlacing configuration comprises multiple subchannel sizes and a bitmap of subchannel indices for each subchannel size.
6 . The UE of claim 1 , wherein at least one PRB-level interlacing scheme of the plurality of PRB-level interlacing schemes extends across multiple subchannels.
7 . The UE of claim 1 , wherein the plurality of PRB-level interlacing schemes comprises a first PRB-level interlacing scheme having allocations starting from a lowest PRB in each subchannel belonging to the resource pool, and wherein the interlacing configuration further indicates a second PRB-level interlacing scheme having allocations starting from a second lowest PRB in each subchannel belonging to the resource pool.
8 . The UE of claim 1 , wherein the interlacing configuration further indicates the interlacing scheme, and wherein the interlacing scheme has allocations starting from both ends of the resource pool, the allocations continuing towards a middle of the resource pool.
9 . The UE of claim 8 , wherein the interlacing scheme comprises at least one of PRB-level interlacing and subchannel-level interlacing.
10 . The UE of claim 1 , wherein the resource pool corresponds to the LBT subband.
11 . The UE of claim 1 , wherein the interlacing configuration further indicates an interleaving scheme for multiple resource pools that occupy the LBT subband.
12 . The UE of claim 11 , wherein a first resource pool of the multiple resource pools has a different subcarrier size than a second resource pool.
13 . The UE of claim 11 , wherein a first resource pool of the multiple resource pools has a different number of subcarriers than a second resource pool.
14 . A method performed by a User Equipment (“UE”), the method comprising: receiving a resource pool configuration for sidelink, wherein the resource pool configuration indicates a resource pool comprising a plurality of physical resource blocks (“PRBs”) corresponding to a Listen-Before-Talk (“LBT”) subband, each PRB comprising a set of subcarriers; receiving an interlacing configuration associated with the resource pool configuration, wherein the interlacing configuration indicates a set of subchannels within the resource pool and a number of interlaces for each subchannel of the set of subchannels, and wherein the number of interlaces is based at least in part on a subcarrier spacing of the resource pool; determining an interlacing scheme based at least in part on the interlacing configuration and the resource pool, wherein the interlacing scheme comprises a plurality of PRB-level interlacing schemes, wherein a respective PRB-level interlacing scheme is determined within each subchannel of the set of subchannels, wherein the interlacing scheme corresponds to a set of non-contiguous PRBs distributed across each subchannel of the set of subchannels, and wherein each subchannel comprises a plurality of interleaved PRBs that satisfies a minimum occupied bandwidth; and transmitting a sidelink transmission over a sidelink channel according to the interlacing scheme, the sidelink channel comprising a sidelink data channel or a sidelink control channel.
15 . A base station for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the base station to: transmit a resource pool configuration to a user equipment (“UE”) for sidelink, wherein the resource pool configuration indicates a resource pool comprising a plurality of physical resource blocks (“PRBs”), each PRB comprising a set of subcarriers; and transmit, to the UE, an interlacing configuration associated with the resource pool configuration, wherein the interlacing configuration indicates a set of subchannels within the resource pool and a number of interlaces for each subchannel of the set of subchannels, wherein the number of interlaces is based at least in part on a subcarrier spacing of the resource pool, and wherein the interlacing configuration further indicates an interlacing scheme for multiple resource pools corresponding to a Listen-Before-Talk (“LBT”) subband, wherein the interleaving scheme corresponds to a set of non-contiguous PRBs distributed across each subchannel of the set of subchannels, and wherein each subchannel comprises a plurality of interleaved PRBs that satisfies a minimum occupied bandwidth.
16 . The base station of claim 15 , wherein the resource pool corresponds to a Listen-Before-Talk (“LBT”) subband.
17 . The base station of claim 15 , wherein the resource pool configuration indicates a subchannel size, wherein a resource pool size is not a multiple of the subchannel size, and wherein the interlacing configuration further indicates a bitmap of remaining PRBs.
18 . A method performed by a base station, the method comprising: transmitting a resource pool configuration to a user equipment (“UE”) for sidelink, wherein the resource pool configuration indicates a resource pool comprising a plurality of physical resource blocks (“PRBs”), each PRB comprising a set of subcarriers; and transmitting, to the UE, an interlacing configuration associated with the resource pool configuration, wherein the interlacing configuration indicates a set of subchannels within the resource pool and a number of interlaces for each subchannel of the set of subchannels, and wherein the number of interlaces is based at least in part on a subcarrier spacing of the resource pool, and wherein the interlacing configuration further indicates an interleaving scheme for multiple resource pools corresponding to a Listen-Before-Talk (“LBT”) subband, wherein the interleaving scheme corresponds to a set of non-contiguous PRBs distributed across each subchannel of the set of subchannels, and wherein each subchannel comprises a plurality of interleaved PRBs that satisfies a minimum occupied bandwidth.

Description

FIELD The subject matter disclosed herein relates generally to wireless communications and more particularly relates to interlacing sidelink resources for operation in unlicensed (i.e., shared) spectrum. BACKGROUND In sidelink communication, a User Equipment (“UE”) is able to communicate directly with another UE and without relaying its messages via a wireless network. BRIEF SUMMARY Disclosed are procedures for configuring interlacing of sidelink resources for operation in shared spectrum. Said procedures may be implemented by apparatus, systems, methods, or computer program products. One method of a User Equipment (“UE”) for interlacing sidelink resources includes receiving a resource pool configuration and receiving an interlacing configuration corresponding to the resource pool configuration. Here, the resource pool configuration indicates a subchannel size and resource pool time-frequency configuration for an unlicensed sidelink carrier. Additionally, the interlacing configuration indicates: a) the number of frequency resources (e.g., subcarriers or Physical Resource Blocks (“PRBs”)) per interlace based on the subchannel size, b) the spacing between the interlace based on the subchannel size, c) the minimum amount of resource to be used for transmission in a resource pool, and d) the type/method of interlacing to be performed. The method includes transmitting a sidelink channel according to the interlacing configuration within the unlicensed sidelink carrier, where the sidelink channel comprises at least one of: a sidelink data channel and a sidelink control channel. One method of a network entity for interlacing sidelink resources includes transmitting a resource pool configuration to a UE, where the resource pool configuration indicates a subchannel size and resource pool time-frequency configuration for an unlicensed sidelink carrier. The method also includes transmitting an interlacing configuration corresponding to the resource pool configuration to the UE, where the interlacing configuration indicates: a) the number of subcarriers (or PRBs) per interlace based on the subchannel size, b) the spacing between the interlace based on the subchannel size, c) the minimum amount of resource to be used for transmission in a resource pool, and d) the type/method of interlacing to be performed. BRIEF DESCRIPTION OF THE DRAWINGS A more particular description of the embodiments briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only some embodiments and are not therefore to be considered to be limiting of scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which: FIG. 1 is a block diagram illustrating one embodiment of a wireless communication system for interlacing sidelink resources; FIG. 2A is a diagram illustrating one embodiment of configuring a resource pool (“RP”) interlacing scheme; FIG. 2B is a diagram illustrating one embodiment of a resource pool for sidelink operation; FIG. 3 is a diagram illustrating one embodiment of a first interlacing scheme for sidelink operation; FIG. 4 is a diagram illustrating one embodiment of a second interlacing scheme for sidelink operation; FIG. 5 is a diagram illustrating one embodiment of a third interlacing scheme for sidelink operation; FIG. 6 is a diagram illustrating one embodiment of a fourth interlacing scheme for sidelink operation; FIG. 7 is a diagram illustrating one embodiment of a fifth interlacing scheme for sidelink operation; FIG. 8 is a diagram illustrating one embodiment of a sixth interlacing scheme for sidelink operation; FIG. 9 is a diagram illustrating one embodiment of a seventh interlacing scheme for sidelink operation; FIG. 10 is a diagram illustrating one embodiment of an eighth interlacing scheme for sidelink operation; FIG. 11 is a diagram illustrating one embodiment of a ninth interlacing scheme for sidelink operation; FIG. 12 is a diagram illustrating one embodiment of a tenth interlacing scheme for sidelink operation; FIG. 13 is a diagram illustrating one embodiment of an eleventh interlacing scheme for sidelink operation; FIG. 14 is a diagram illustrating one embodiment of a twelfth interlacing scheme for sidelink operation; FIG. 15 is a diagram illustrating one embodiment of a thirteenth interlacing scheme for sidelink operation; FIG. 16 is a diagram illustrating one embodiment of a fourteenth interlacing scheme for sidelink operation; FIG. 17 is a diagram illustrating one embodiment of a fifteenth interlacing scheme for sidelink operation; FIG. 18 is a block diagram illustrating one embodiment of a user equipment apparatus that may be used for interlacing sidelink resources; FIG. 19 is a block diagram illustrating one embodiment of a network apparatus that may be used for interlacing sidelink resources; FIG. 20 is a flowchart diagram