Enhancements to psfch for sidelink operation on unlicensed spectrum

Abstract

One aspect of the disclosure relates to a method comprising: receiving control signaling that configures a sidelink transmission structure for a physical sidelink feedback channel (PSFCH) transmission and one or more path-loss-based power control parameters; determining a number of physical resource blocks (PRBs) for the PSFCH transmission based at least in part on the sidelink transmission structure; determining a transmit power for at least a subset of the PRBs based at least on the one or more path-loss-based power control parameters; and transmitting the PSFCH transmission via the subset of PRBs using the determined transmit power.

Description

Cross-references to related applications

[0001] This application claims the benefit of U.S. Provisional Patent Application No. 63 / 547,321, filed November 3, 2023, the entire contents of which are incorporated herein by reference. Background Technology

[0002] Wireless communication networks provide an integrated communication platform and telecommunications services to wireless user equipment. Example telecommunications services include telephone, data (e.g., voice, audio, and / or video data), messaging, and / or other services. Wireless communication networks have wireless access nodes that exchange wireless signals with wireless user equipment using wireless network protocols, such as those described in various telecommunications standards issued by the 3rd Generation Partnership Project (3GPP). Example wireless communication networks include Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal Frequency Division Multiple Access (OFDMA) networks, Long Term Evolution (LTE), and 5G New Radio (5G NR). Wireless communication networks use technologies such as OFDM, Multiple-Input Multiple-Output (MIMO), Advanced Channel Decoding, Massive MIMO, beamforming, and / or other features to facilitate mobile broadband services. Summary of the Invention

[0003] This disclosure relates to a power control scheme for transmitting the Physical Side Link Feedback Channel (PSFCH). Specifically, power control for PSFCH transmission may be based on the number of physical resource blocks used to transmit the PSFCH.

[0004] According to one aspect of this disclosure, a method performed by a user equipment (UE) to communicate with another UE using a sidelink in an unlicensed spectrum, the method comprising: determining the number of physical resource blocks for Physical Shared Feedback Channel (PSFCH) transmission; and determining the PSFCH transmission power for transmitting the PSFCH transmission on the physical resource blocks.

[0005] In some specific implementations, the PSFCH transmit power is determined as follows: , Where P PSFCH,one It is the power used to transmit a dedicated PRB for transmission within a PSFCH, P O,PSFCH It is set in the side link power control field dl-P0-PSFCH The defined nominal power (pre-)configured value, K3 is the number of physical resource blocks used for PSFCH transmission, α PSFCH It is set in the sidelink power control field dl-alpha-PSFCH Defined path loss (pre)configured values, μ is the parameter set of the side link, and PL is the downlink path loss.

[0006] Some specific implementations include determining that the PSFCH transmit power on the dedicated PRB should be adjusted to remain within a predetermined power spectral density value; and changing the determined PSFCH transmit power on the dedicated PRB based on this predetermined power spectral density limit.

[0007] In some specific implementations, determining whether the PSFCH transmit power should be adjusted includes determining... .

[0008] In some specific implementations, changing the determined PSFCH transmit power on the dedicated PRB includes changing the determined PSFCH transmit power to: dBm.

[0009] In some specific implementations, the power spectral density is limited to 10 dBm or 17 dBm.

[0010] Some specific implementations include determining that the first dedicated physical resource block used to send the PSFCH is less than 1 MHz adjacent to the second dedicated physical resource block used to send another PSFCH; and discarding the dedicated physical resource block used to send the PSFCH with the lowest priority.

[0011] Some specific implementations include discarding the dedicated physical resource block used to send the PSFCH until... Less than 10dBm.

[0012] Some specific implementations include determining the time transmit power of the common interleaving used for PSFCH transmission as , in β is the number of common interleaved physical resource blocks in each RB set, R is the number of resource block sets used for common interleaved transmission, and β is the (pre)configured offset between the power value of common interleaving and the transmission power of the dedicated physical resource blocks used for PSFCH transmission.

[0013] In some specific implementations, It is the minimum number of physical resource blocks per interleaved component in each of the 10 physical resource blocks, resource pools, or sidelink bandwidth portions.

[0014] In some specific implementations, It is the maximum number of physical resource blocks per interleaving in each of the 11 physical resource blocks, resource pools, or sidelink bandwidth portions.

[0015] In some specific implementations, Includes a (pre-)configured number of physical resource blocks.

[0016] In some specific implementations, This includes multiple physical resource blocks based on a (pre)configured interleaving index based on common interleaving.

[0017] Some specific implementations include identifying one or more PSFCHs for transmission based on one or more of the user equipment capabilities and total transmit power limits.

[0018] Some specific implementations include, for a PSFCH transmission associated with a physical side link shared channel or physical side link control channel transmission, where one of the physical side link shared channel or physical side link control channel transmissions is performed on multiple resource block sets, the PSFCH transmission includes one PSFCH transmission for each resource block set for each physical side link shared channel or physical side link control channel transmission.

[0019] Some specific implementations include determining the number (M) of resource blocks to be transmitted after each dedicated physical resource block used for PSFCH transmission in common interleaving; and determining the transmission power of the M resource blocks used for common interleaving as follows: M is counted over multiple sets of resource blocks in the resource pool and over skipped physical resource blocks that are skipped within 1 MHz of another physical resource block used for PSFCH transmission.

[0020] In some specific implementations, the PSFCH transmit power is determined as follows: , in It is the dedicated interleaved transmit power used for transmitting a PSFCH. It is the number of PRBs reserved for sending to PSFCH, P O,PSFCH yes dl-P0-PSFCH The value, yes dl-Alpha-PSFCH The value (if provided); otherwise 1, μ is the parameter set of the side link, and PL is the downlink path loss.

[0021] In some specific implementations, It is a reference quantity of (pre)configured interleaved PRB.

[0022] In some specific implementations, Includes 10 or 11 PRBs.

[0023] A non-transitory computer storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform the operations described in any of the preceding claims or herein.

[0024] A user equipment (UE) may include one or more processors and one or more storage devices, wherein instructions are stored on the one or more storage devices, which, when executed by the one or more computers, are operable to cause the one or more computers to perform the method according to any one of claims 1 to 16.

[0025] A UE may include one or more processors and one or more storage devices, wherein instructions are stored on the one or more storage devices, which, when executed by the one or more computers, are operable to cause the one or more processors to perform one or more operations as described in this specification.

[0026] The previously described embodiments can be implemented using: a computer-implemented method; a non-transitory computer-readable medium storing computer-readable instructions to perform the computer-implemented method; and a computer system including a computer memory interoperably coupled to a hardware processor configured to perform the computer-implemented method or instructions stored on the non-transitory computer-readable medium.

[0027] A system (e.g., a base station, or a device including one or more baseband processors) may be configured to perform specific operations or actions by means of software, firmware, hardware, or combinations thereof installed on the system that enable the system to perform actions in operation. Operations or actions performed by the system may include those described herein.

[0028] Details of one or more embodiments of these systems and methods are set forth in the following figures and description. Other features, objects, and advantages of these systems and methods will be apparent from the specification, figures, and claims. Attached Figure Description

[0029] Figure 1A and Figure 1B Each example time slot is illustrated according to some specific implementations, including the timing of the Physical Side Link Feedback Channel (PSFCH).

[0030] Figure 2A The physical resources of sidelink slots, including PSFCH timing, are illustrated according to some specific implementations.

[0031] Figure 2B The physical resources of sidelink slots excluding PSFCH timing are illustrated according to some specific implementations.

[0032] Figures 3A to 3C Example transmission schemes for side link synchronization signal blocks (S-SSBs) according to some specific implementations of this disclosure are illustrated.

[0033] Figure 4Example communication systems including sidelink communication are illustrated according to some specific implementations.

[0034] Figure 5 This is a schematic diagram illustrating an example of two dedicated interleavings for transmitting PSFCH according to some specific implementations of this disclosure.

[0035] Figure 6 This is a schematic diagram illustrating an example of a common interleaving and two dedicated physical resource block sets for transmitting PSFCH according to some specific implementations of this disclosure.

[0036] Figure 7A and Figure 7B This is a process flow diagram of a method for setting power control for PSFCH transmission according to some specific embodiments of this disclosure.

[0037] Figure 8 This is a schematic diagram illustrating the association of PSFCH between two PSSCH or PSCCH transmissions sent on different resource block sets according to some specific implementations of this disclosure.

[0038] Figure 9 This is a schematic diagram illustrating the monitoring of received PSFCH transmissions according to some specific embodiments of this disclosure.

[0039] Figure 10 This is a schematic diagram illustrating support for transmission of multiple consecutive time slots in Mode 1 according to some specific implementations of this disclosure.

[0040] Figure 11 Example user equipment (UE) based on some specific implementations are illustrated.

[0041] Figure 12 Example access nodes are shown according to some specific implementations. Detailed Implementation

[0042] In some wireless communication systems, a first user equipment (UE) may receive Physical Sidelink Shared Channel (PSSCH) transmissions or Physical Sidelink Control Channel (PSCCH) transmissions from a second UE. Furthermore, the first UE may transmit Physical Sidelink Feedback Channel (PSFCH) transmissions that include Hybrid Automatic Repeat Request (HARQ) Acknowledgment (HARQ-ACK) feedback for the PSSCH or PSCCH transmissions. In some specific implementations, the first UE may use either a common interleaving mode or a dedicated interleaving mode for PSFCH transmission. Using the common interleaving mode, the first UE may use a combination of common physical resource blocks (PRBs) and dedicated PRBs for PSFCH transmission. Using the dedicated interleaving mode, the first UE may use only dedicated PRBs for PSFCH transmission. However, in some cases, it may be unclear how to allocate transmission power among the various PRBs in the PSFCH transmission.

[0043] According to various aspects of this disclosure, the UE may receive radio resource control (RRC) signaling that configures the sidelink transmission structure (e.g., dedicated interleaving or common interleaving) for PSFCH transmission. The RRC signaling may also indicate one or more path loss-based power control parameters (such as...) for PSFCH transmission. dl-P0-PSFCH and dl-Alpha-PSFCH Furthermore, the UE can determine the number of PRBs. ) and transmission power ( This is used for PSFCH transmission based on RRC signaling. The transmit power can be applied to some or all of the PRBs allocated for PSFCH transmission. Therefore, the UE can use the determined transmit power to transmit PSFCH via the corresponding PRB.

[0044] Figure 1A and Figure 1B Example side-link time slots 100 and 110 are illustrated according to some specific implementations, including PSFCH timing. PSFCH timing can occur periodically (e.g., every other time slot), such as... Figure 1A As shown, or it can occur in each time slot, such as Figure 1BAs shown. The receiving UE can use each PSFCH opportunity to send feedback (e.g., ACK or NACK) related to a previous sidelink transmission (e.g., PSSCH or PSCCH transmission). As an example configuration of sidelink slot 100 where PSFCH opportunities occur periodically, PSFCH opportunity 102 may carry feedback related to PSSCH / PSCCH transmission 104 that occurred in the two slots preceding PSFCH opportunity 102. As another example configuration of sidelink slot 110 where PSFCH opportunities occur in each slot, PSFCH opportunity 112 may still carry feedback related to PSSCH / PSCCH transmission 114 that occurred in the two slots preceding PSFCH opportunity 112. However, in some cases, not all scheduled PSFCH opportunities are used. For example, the receiving UE may not have feedback to send on the PSFCH, thus leaving the PSFCH empty.

[0045] This disclosure generally relates to sidelinks on unlicensed spectrum for both Mode 1 and Mode 2, wherein Uu interface operation for Mode 1 is limited to licensed spectrum. Specifically, this disclosure describes systems and methods for supporting sidelink communication on unlicensed spectrum. This disclosure particularly describes systems and methods for: (1) power control for PSFCH transmission; (2) design of PSFCH-like sequences for maintaining COT; (3) UE behavior for transmitting or receiving PSFCH for PSSCH multi-continuous slot (MCSt) transmission; and (4) supporting MCSt in Mode 1 resource allocation.

[0046] The channel access mechanism from NR-U can be reused for unlicensed sidelink operations. For sidelink operations, within the boundaries of the unlicensed channel access mechanism and operations, the applicability of accessing sidelink resource reservations from Rel-16 / Rel-17 is considered for unlicensed sidelink operations.

[0047] One of the features developed for the latest generation of wireless communication systems is sidelink communication (SL-U) on unlicensed spectrum. Unlicensed spectrum refers to frequency bands that are not dedicated to or licensed for use by only one technology or operator, such as 5 GHz and / or 6 GHz. Because the frequency band is not dedicated to use by only one technology, UEs operating on unlicensed spectrum are configured with features for access and communication on unlicensed spectrum. These features include channel access mechanisms such as Listen-Before-Speak (LBT) and Channel Occupancy Time (COT), and channel access requirements such as Occupied Channel Bandwidth (OCB) requirements. Generally, a channel access mechanism involves the initiating UE obtaining access to a sidelink channel on unlicensed spectrum to communicate with a responding UE. The initiating UE can be a sending UE, and the responding UE can be a receiving UE, or vice versa.

[0048] The Channel Occupied Time (COT) procedure stipulates that an initiating UE that has accessed an unlicensed spectrum channel will maintain control of the channel until a threshold gap, such as 16 microseconds (µs), exists during channel occupancy. This gap signals to other UEs attempting to access the channel that the channel is no longer occupied. Therefore, if the initiating UE does not use the channel (e.g., by transmitting or receiving on the channel) for at least 16 µs, the UE will lose control of the channel, even if it has additional data to transmit or receive. The Occupied Channel Bandwidth (OCB) requirement stipulates that the initiating UE must use a threshold percentage (e.g., 80%) of the access channel bandwidth when using the channel. If the initiating UE does not meet this requirement, the UE may lose access to the channel.

[0049] While these unlicensed spectrum features have been used in non-sidelink communications (e.g., New Radio-Unlicensed (NR-U)), their application in SL-U presents sidelink-specific challenges. One issue involves the Physical Sidelink Feedback Channel (PSFCH). Generally, in some or all time slots, sidelink communications include PSFCH timings for carrying feedback related to the successful or failed reception of previous sidelink transmissions on, for example, the Physical Sidelink Shared Channel (PSSCH) or the Physical Sidelink Control Channel (PSCCH).

[0050] Figure 2A Examples of physical resources for sidelink time slots, including PSFCH timing, are shown based on some specific implementations. For example... Figure 2A As shown, a time slot may include an Automatic Gain Control (AGC) symbol, a PSCCH symbol, a PSSCH symbol, and two PSFCH symbols. The PSFCH symbol includes resources for AGC training. For example, one symbol may be dedicated to AGC training, while the other may be dedicated to PSFCH. Additionally, a time slot includes a gap symbol preceding the PSFCH symbol and a gap symbol following the PSFCH symbol. For reference, Figure 2B The physical resources of the sidelink slots excluding the PSFCH timing are illustrated.

[0051] Returning to the PSFCH-related issues that arose in SL-U, there are situations where the PSFCH timing is not used. Specifically, leaving the PSFCH timing blank on unlicensed spectrum can cause the initiating UE to lose its access to the channel, because the UE's failure to transmit / receive during the PSFCH timing may result in a gap larger than the threshold gap used to maintain COT. This will occur even if the initiating UE has additional data to transmit / receive.

[0052] Another issue involves meeting the OCB requirements in the SL-U. Unlicensed spectrum comprises 20 MHz channels, referred to as resource block (RB) sets. The sidelink bandwidth portion (BWP) may include one or more RB sets. In either scenario, the transmitting UE must occupy at least a threshold percentage of the access channel bandwidth to meet the OCB requirements. However, some communications may not occupy enough of one or more RB sets to meet the OCB requirements.

[0053] For example, such as Figure 3A As shown, the Sidelink Synchronization Signal Block (S-SSB) is transmitted on 11 RBs. To meet the OCB requirements when accessing an RB set, the transmitting UE can repeat the S-SSB in the frequency domain within an RB set, such as... Figure 3B As shown. Furthermore, to meet the OCB requirements when accessing on more than one RB set, the transmitting UE can repeat the S-SSB in each RB set, such as... Figure 3C As shown. If the UE does this only on one RB set in the RB set, the UE may lose control over the other RB sets. However, when repeating S-SSB transmissions, the transmitting UE cannot use traditional S-SSB parameters (e.g., transmit power) because these parameters do not take into account repeated signals. For example, using the same traditional transmit power for every S-SSB transmission will result in transmission failure because the total transmit power will exceed the UE's capacity.

[0054] For unlicensed spectrum, each transmission occupies 80% of the resource block set. Regarding power control for side-link system synchronization block (S-SSB) transmissions, the UE may transmit S-SSB duplicates in more than one RB set. Due to the number of RB sets used, the power of S-SSB transmissions on at least the anchored RB set remains unchanged. On the anchored RB set, there is a (pre)configured offset P. offset anchor According to [dBm] is used to limit the maximum power, where i It is a time slot index and The value range is: {10log(N), [10log(N)+2, 10log(N)+4, …], 10log(W)}. For the non-anchored RB set, the UE first allocates power to the S-SSBs repeatedly on the anchored RB set, and assumes that the power of each S-SSB repetition is... .

[0055] Then, the UE will use the remaining power Other S-SSB repeats are equally distributed across all other used RB sets, where ,and and In this formula, it is converted to linear units (i.e., watts). The same downlink path loss is considered for both anchored RB set transmission and non-anchored RB set transmission.

[0056] In the above (and forthcoming), M is the total number of RB sets within the sidelink BWP, N is the number of S-SSB repetitions within the anchored RB set, and W is the maximum total number of S-SSB repetitions on the RB sets within the sidelink BWP. The power used for S-SSB transmission mentioned above refers to the power of one S-SSB repetition. The UE attempts to transmit at least on the anchored RB set. The anchored RB set refers to the set containing... sl-AbsoluteFrequencySSB-r16 The set of RBs to which the indicated S-SSB is located. In the aforementioned scenario, It is defined according to TS 38.101-1 and is used for transmitting all S-SSBs repeatedly on all used RB sets.

[0057] Some aspects of this disclosure relate to power control for PSFCH. Regarding PSFCH transmission with sub-channel spacing (SCS) of 15 kHz and 30 kHz, one or more of the following options may be supported.

[0058] In some specific implementations, each PSFCH transmission occupies 1 common interleaving and K3 dedicated PRBs, where K3 is (pre)configured to have a value range of {1, 2, 5}. The K3 dedicated PRBs are on the same interleaving. Some guard band PRBs may exist between the common PRBs and the dedicated PRBs. The term (pre)configuration in this specification and claims means that the feature can be preset, or can be set or reset via synchronization or protocol change configuration between the UE and another UE or between the UE and the base station.

[0059] Multiple cyclic shift (CS) pairs can be used on the K3 dedicated PRBs, as in other NR sidelink PSFCH transmission schemes. When the common interleaved PRBs and dedicated PRBs are within the same 1MHz bandwidth, the UE transmits on the dedicated PRBs while satisfying the Occupied Channel Bandwidth (OCB) constraint. In some cases, the transmission power on the common PRBs can be reduced. The number of guard band PRBs can be configurable. In some cases, (pre)configurable gaps (including 0) can be used. In other cases, this can be satisfied through (pre)configuration without additional specification effects (e.g., setting the correct bit values ​​in the bitmap for PSFCH PRB allocation), etc.

[0060] In some implementations, each PSFCH transmission occupies one dedicated interleaving. PSSCH transmissions on non-overlapping resources can be mapped to an orthogonal dedicated PRB used for PSFCH transmissions. PRB-level cyclic shift transitions (as in NR-U) can be supported to reduce PAPR; common PRBs may also be discarded if the dedicated PRBs satisfy OCB constraints.

[0061] In some specific implementations, power control for PSFCH is first determined based on the overall structure for PSFCH transmission (common interleaving or private interleaving with K3 dedicated PRBs). Then, power control for PSFCH transmission can be determined based on the number of PRBs, the total power level, the PRB spacing in the frequency domain, and other factors, as discussed in more detail below.

[0062] When neither the COT-initiating UE nor the responding UE intends to transmit PSFCH on any PSFCH timing within the COT, one or more of the following options can be used to avoid COT interruption. In some implementations, the COT-initiating UE or the responding UE transmits PSSCH on such PSFCH timings. In other implementations, the COT-initiating UE or the responding UE transmits PSFCH-like signals on such PSFCH timings. This disclosure allows the UE to use PSFCH-like messages to maintain the COT. For a PSCCH / PSSCH transmission via (pre)configured N associated candidate PSFCH timings, the value of N ranges from at least {1, 2, 3, 4}. When N is greater than 1, at least when the two PSCCH / PSSCH transmissions are on non-overlapping resources, the N associated candidate PSFCH timings for one PSCCH / PSSCH transmission have different time and / or frequency resources than the candidate PSFCH timings for the other PSCCH / PSSCH transmission.

[0063] Some aspects of this disclosure relate to configuring class PSFCH transmission for the UE to maintain COT. This disclosure also relates to UE behavior during PSCCH or PSSCH transmission. If a PSCCH / PSSCH transmission has N associated candidate PSFCH timings, the Rx UE can use one or more of the following methods to receive the PSFCH used for the PSCCH / PSSCH transmission. For unicast detection, the Rx UE attempts to monitor candidate PSFCH timings until one PSFCH is detected or all candidate PSFCH timings are detected. If one PSFCH is detected, the Rx UE can avoid monitoring subsequent candidate PSFCH timings.

[0064] For reporting, if the Rx UE receives the PSFCH, the Rx UE reports the same value as the HARQ-ACK information determined by the UE from the PSFCH to the higher layer; otherwise, the UE reports NACK to the higher layer.

[0065] For multicast monitoring (NACK only): The Rx UE attempts to monitor all candidate PSFCH timings. If a NACK is detected, the Rx UE can avoid monitoring subsequent candidate PSFCH timings. For reporting, if the Rx UE does not detect any PSFCH in all candidate PSFCH timings, the Rx UE reports an ACK to the higher layer; otherwise, the UE reports a NACK to the higher layer.

[0066] For multicast monitoring (ACK / NACK): The Rx UE attempts to monitor PSFCH transmission timings until PSFCH from all transmitters has been detected or all candidate PSFCH timings have been detected. If the Rx UE detects a PSFCH from a PSFCH transmitter, it can skip PSFCH detection for subsequent PSFCH transmission timings of that transmitter. For reporting, if an ACK has been detected from at least one PSFCH timing of each of all expected PSFCH receivers, the Rx UE reports an ACK to the higher layer; otherwise, the Rx UE reports a NACK to the higher layer.

[0067] For unicast detection, the Rx UE attempts to detect all candidate PSFCH opportunities. If a PSFCH is detected, the Rx UE can avoid detecting subsequent candidate PSFCH opportunities (if any). The Rx UE can also use PSFCH prioritization rules.

[0068] For multicast monitoring (ACK / NACK): The Rx UE attempts to monitor all PSFCH transmission opportunities. If the Rx UE detects a PSFCH from a PSFCH transmitter, it can skip PSFCH detection for subsequent PSFCH transmission opportunities for that transmitter (if any). The Rx UE can also use PSFCH prioritization rules.

[0069] Each PSFCH transmission can occupy 1 common interleaving and K3 dedicated PRBs. If the UE transmits N PSFCHs, the final Tx power on a common PRB is marked as P_common, and the final Tx power on a dedicated PRB can be marked as P_dedicated, where P_common <= P_dedicated; and the offset between P_common and P_dedicated is (pre)configured.

[0070] In some specific implementations, the following power relationships between the resource blocks on the common interleaving and the resource blocks on the dedicated interleaving may also be supported: P_common < P_dedicated; or P_common = P_dedicated.

[0071] As described herein, the PSFCH may carry ACK, NACK, and HARQ feedback. The present disclosure describes systems and methods for supporting sidelink communication on unlicensed spectrum. The present disclosure describes systems and methods for: (1) power control for PSFCH transmission; (2) design of PSFCH-like sequences for maintaining the COT; and (3) UE behavior for transmitting or receiving PSFCH for PSSCH MCSt transmission.

[0072] Figure 4 An example communication system 400 including sidelink communication is illustrated according to some specific implementations. It should be noted that Figure 4 the system is only one example of possible systems, and those features of the present disclosure may be implemented in other wireless communication systems.

[0073] The following description is provided for an example communication system in conjunction with fifth-generation (5G) network operations provided by 3GPP technical specifications. However, the example specific implementations are not limited in this regard, and the described examples may be applied to other networks that may benefit from the principles described herein, such as 3GPP Long-Term Evolution (LTE) networks, Wi-Fi, or Worldwide Interoperability for Microwave Access (WiMAX) networks, etc. In addition, other types of communication standards are possible, including future 3GPP systems (e.g., sixth-generation (6G)), IEEE 802.16 protocols, etc. Although terms commonly associated with 5G NR may be used herein to describe aspects, aspects of the present disclosure may be applied to other systems, such as 3G, 4G, and / or systems after 5G (e.g., 6G).

[0074] The frequency bands of 5G NR may be divided into two different frequency ranges. Frequency Range 1 (FR1) may include frequency bands operating at frequencies below 6 GHz, some of which are available for previous standards and may potentially be extended to cover new spectrum products from 410 MHz to 7125 MHz. Frequency Range 2 (FR2) may include frequency bands from 24.25 GHz to 52.6 GHz. The frequency bands in the millimeter-wave (mmWave) range of FR2 may have a smaller coverage range but potentially higher available bandwidth than the frequency bands in FR1.

[0075] As shown in the figure, the communication system 400 includes multiple user equipment. More specifically, the communication system 400 includes two UEs 405 (UE 405-1 and UE 405-2 are collectively referred to as "UE 405" or "multiple UE 405"), two base stations 410 (base station 410-1 and base station 410-2 are collectively referred to as "base station 410" or "multiple base station 410"), two cells 415 (cell 415-1 and cell 415-2 are collectively referred to as "cell 415" or "multiple cell 415"), and one or more servers 435 in a core network (CN) 440 connected to the Internet 445.

[0076] In some implementations, UE 405 may communicate directly with base station 410 via links 420 (links 420-1 and 420-2 are collectively referred to as "links 420" or "multiple links 420"), which utilize a direct interface with the base station (referred to as the "Uu interface"). Each link in the links 420 may represent one or more channels. Links 420 are exemplified as air interfaces for implementing communication coupling and may conform to cellular communication protocols such as GSM, CDMA network protocols, UMTS, 3GPP LTE, LTE-A (LTE-Advanced Long Term Evolution), LTE-based Unlicensed Spectrum Access (LTE-U), 5G, NR, NR-based Unlicensed Spectrum Access (NR-U), and / or any other communication protocols discussed herein.

[0077] As shown in the figure, some user equipments (UEs) may be able to communicate directly with each other, for example, without intermediate infrastructure equipment (such as base station 410-1). In this example, UE 405-1 can communicate directly with UE 405-2. Similarly, UE 405-2 can communicate directly with UE 405-1. This peer-to-peer communication can utilize a “sidelink” interface such as the PC5 interface. In some specific implementations, the PC5 interface supports direct cellular communication between user equipments (e.g., between UEs 405), while the Uu interface supports cellular communication with infrastructure equipment (such as base stations). For example, UE 405 can use the PC5 interface for Radio Resource Control (RRC) signaling exchange between UEs (also known as PC5-RRC signaling). The PC5 / Uu interface is used only as an example, and as used herein, PC5 can represent various other possible wireless communication technologies that allow direct sidelink communication between user equipments, while Uu can represent cellular communication between user equipment and infrastructure equipment (such as base stations).

[0078] In some implementations, UE 405 may be configured with parameters for communication via the Uu interface and / or sidelink interface. In some examples, UE 405 may be "pre-configured" with certain parameters. In these examples, the parameters may be hardwired into UE 405 or decoded into a specification. Additionally and / or alternatively, UE 405 may receive parameters from one or more base stations in base station 410.

[0079] To transmit data to or receive data from one or more base stations 410 or UE 405, UE 405 may include a transmitter / receiver (or alternatively, a transceiver), memory, one or more processors, and / or other similar components enabling UE 405 to operate according to one or more wireless communication protocols and / or one or more cellular communication protocols. UE 405 may have multiple antenna elements that enable UE 405 to maintain multiple links 420 and / or side links 425 to transmit data to or receive data from multiple base stations 410 and / or multiple UEs 405. For example, as Figure 4 As shown, UE 405-1 can be connected to base station 410-1 via link 420, and simultaneously connected to UE 405-2 via side link 425.

[0080] In some implementations, one or more sidelink radio bearers may be established on sidelink 425. Sidelink radio bearers may include signaling radio bearers (SRBs) and / or data radio bearers (DRBs).

[0081] The PC5 interface may alternatively be referred to as a sidelink interface and may include one or more logical channels, including but not limited to the Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Feedback Channel (PSFCH), and / or any other similar communication channels. The PSFCH carries feedback related to the successful or failed reception of a sidelink transmission. The PSSCH may be scheduled by the Sidelink Control Information (SCI) carried in the sidelink PSCCH. In some examples, the sidelink interface may operate on unlicensed spectrum (e.g., in unlicensed 5 GHz and 6 GHz bands) or (licensed) shared spectrum.

[0082] In one example, a sidelink interface enables vehicle-to-everything (V2X) communication. V2X communication may, for example, follow the 3GPPC Cellular V2X (C-V2X) specification, or one or more other or subsequent standards, thereby enabling communication between vehicles and other devices and network entities. V2X communication can utilize both long-range (e.g., cellular) communication and short- to medium-range (e.g., non-cellular) communication. V2X communication with cellular capabilities may be referred to as cellular V2X (C-V2X) communication. C-V2X systems can use various cellular radio access technologies (RATs), such as 4G LTE or 5G NR RATs (or RATs after 5G, such as 6G RATs). Certain LTE standards available in V2X systems may be referred to as LTE-Vehicle (LTE-V) standards. As used in the context of V2X systems and as defined above, the term “user equipment” can generally refer to equipment associated with a mobile or traffic participant in a V2X system, such as mobile (capable of moving) communication equipment, like vehicles, pedestrian user equipment (PUE) devices, and roadside units (RSUs).

[0083] In some implementations, UE 405 may be a physical hardware device capable of running one or more applications, accessing network services via one or more radio links 420 to a corresponding base station 410 (also referred to as a "serving" base station), and communicating with each other via side links 125. Link 420 allows UE 405 to send and receive data from the base station 410 providing the link 420. Side links 425 allow UE 405 to send and receive data with each other. Side links 425 between UE 405 may include one or more channels for sending information from UE 405-1 to UE 405-2 (and vice versa) and / or between UE 405 and UE type RSU (and vice versa).

[0084] In some implementations, base stations 410 can communicate with each other on backhaul connection 430 and with one or more servers 435 within CN 440 on another backhaul connection 433. The backhaul connection can be a wired and / or wireless connection.

[0085] In some implementations, UE 405 is configured to use a resource pool for sidelink communication. The sidelink resource pool defines the time-frequency resources used for sidelink communication and can be divided into multiple time slots, frequency channels, and frequency sub-channels. In some examples, UE 405 is synchronized and performs sidelink transmission aligned with time slot boundaries. It is expected that the UE will select several time slots and sub-channels for transmitting transport blocks (TBs). In some examples, the UE can use different sub-channels to transmit TBs across multiple time slots within its own resource selection window.

[0086] In some specific implementations, base station 410 may configure a special exception resource pool for UE 405. The special exception resource pool includes resources that UE 405 can use in special exception situations such as radio link failure (RLF). This special exception resource pool may include resources selected based on random resource allocation.

[0087] In some specific implementations, the UE initiating communication with another UE is called the transmitter UE (TX UE), and the UE receiving the communication is called the receiver UE (RX UE). For example, UE 405-1 can be a TX UE, while UE 405-2 can be an RX UE. Although Figure 4 The example illustrates a single TX UE communicating with a single RX UE, but a TX UE can communicate with more than one RX UE via a side link.

[0088] In some implementations, the TX UE initiating sidelink communication can determine available resources (e.g., sidelink resources) and can select a subset of these resources to communicate with the RX UE based on a resource allocation scheme. Example resource allocation schemes include Mode 1 and Mode 2. In Mode 1 (referred to as "Mode 1"), resources are allocated to UEs within coverage area by network nodes. In Mode 2 (referred to as "Mode 2"), the TX UE selects sidelink resources (e.g., sidelink transmission resources).

[0089] In some specific implementations, the communication system 400 supports different broadcast types, including unicast, broadcast, and multicast (or multicast) communication. Unicast refers to direct communication between two UEs. Broadcast refers to communication from a single UE to multiple other UEs. Multicast refers to communication from a single UE to a set of UEs that meet certain conditions (e.g., as a member of a specific group).

[0090] In the Rel-16 NR sidelink, each PSFCH transmission occupies one PRB. In SL-U, each PSFCH transmission occupies one common interleaving and K3 dedicated PRBs, or each PSFCH transmission occupies one dedicated interleaving. In other words, each PSFCH transmission occupies more than one PRB. Therefore, existing power control formulas for PSFCH do not take into account the number of PRBs per PSFCH transmission.

[0091] In some specific implementations, PSFCH transmissions can be constructed using dedicated interleaving. This is in Figure 5 Described in the text. Figure 5 This is a schematic diagram illustrating examples of two dedicated interleavings for transmitting PSFCH according to some specific implementations of this disclosure. Each interleaving includes a set of PRBs. Each set of PRBs can be used to transmit one PSFCH.

[0092] The PSFCH transmit power can be controlled based on the number of PRBs used for dedicated interleaving. Different options exist for determining the number of PRBs used for dedicated interleaving. If each PSFCH transmit occupies one dedicated interleaving, the transmit power of each PSFCH is given by the following formula: , in It is the dedicated interleaved transmit power used for transmitting a PSFCH. It is the number of PRBs reserved for sending to PSFCH, P O,PSFCH yes dl-P0-PSFCH The value, yes dl-Alpha-PSFCH The value (if provided); otherwise =1. (TS 38.213 Section 16.2.3), μ is the set of parameters for the side link (e.g., μ=0 for a 15kHz subcarrier spacing and μ=1 for a 30kHz subcarrier spacing), and PL is the downlink path loss. This is a (pre-)configured reference number of interleaved PRBs. Interleaving can be 10 or 11 PRBs. RRC parameters can be introduced. numRefPRBOfInterlace This indicates the reference number of interleaved PRBs within a set of RBs for sidelink transmit block size (TBS) purposes. The same parameter can be reused to determine the PSFCH transmit power.

[0093] If one PSFCH transmission is associated with a dedicated interleaving of 10 PRBs, and another PSFCH transmission is associated with a dedicated interleaving of 11 PRBs, then The value is not unique.

[0094] In some specific implementations, Always 10 PRBs, or the minimum number of PRBs per interleaving in the resource pool / sidelink BWP.

[0095] In some specific implementations, Always 11 PRBs, or the maximum number of PRBs per interleaving in the resource pool / sidelink BWP.

[0096] In some specific implementations, This is the number of PRBs (pre-)configured in the resource pool (e.g., 10 or 11 PRBs).

[0097] The (pre)configured number may be related to the number of PRBs used for each interleaving determined by the sidelink TBS (e.g., parameters). numRefPRBOfInterlace (Same or different)

[0098] In some specific implementations, This is the number of PRBs (pre-)configured in the sidelink BWP (e.g., 10 or 11 PRBs).

[0099] The (pre)configured number may be related to the number of PRBs used for each interleaving determined by the sidelink TBS (e.g., parameters). numRefPRBOfInterlace (Same or different)

[0100] For a dedicated interleaved PSFCH, the transmit power of each PSFCH is given as follows: , in From RRC parameters numRefPRBOfInterlace Given, the reference number of an interleaved PRB within a set of RBs.

[0101] In some cases, PSFCH is sent on multiple RB sets to maintain COT. If the PSFCH transmission is for PSSCH / PSCCH transmission, both PSSCH / PSCCH and PSFCH are supported on multiple RB sets. In this case, the PSFCH transmission is treated as multiple PSFCH transmissions.

[0102] The PSFCH transmit power can be adjusted based on a power spectral density (PSD) limit (e.g., 10 dBm / MHz or 17 dBm / MHz). To meet the PSD limit (10 dBm / MHz), the following relationship can be defined.

[0103] if Greater than 10dBm (e.g., PSD limit). Can be updated / downgraded to dBm.

[0104] If it comes from the PSFCH used for scheduled transmission. ( ) dedicated interleaved RBs less than 1MHz, and if If it is greater than 10dBm (e.g., PSD limit), then Updated to dBm.

[0105] In some specific implementations, if the two RBs transmitted from the two PSFCHs are within 1MHz, the PSFCH transmission power can be adjusted.

[0106] If each PSFCH transmission occupies 1 common interleaving space and K3 dedicated PRBs, the number of PRBs used for common interleaving and the number of dedicated PRBs can be different. Furthermore, the transmission power on each common PRB can be less than or equal to the transmission power on each dedicated PRB. If the UE transmits multiple PSFCHs simultaneously, the transmission power on the common PRBs may increase due to the multiple PSFCH transmissions.

[0107] The transmit power of the common-interleaved PSFCH and / or the transmit power of the dedicated PRB can be adjusted based on the number of dedicated PRBs. This is in Figure 6 As shown in the image. Figure 6 This is a schematic diagram illustrating an example of a common interleaving and two dedicated PRB sets for transmitting a PSFCH according to some specific embodiments of this disclosure. In this example, the PSFCH consists of a common interleaving and K3 dedicated PRBs.

[0108] According to various aspects of this disclosure, the Tx UE can separate the transmission power of the K3 dedicated PRBs from the transmission power of the common interleaved resource blocks. Figure 7A This is a process flow diagram of a method 700 for setting power control for PSFCH transmission according to some specific embodiments of this disclosure.

[0109] At 702, method 700 includes determining the transmission power for a dedicated PRB based on the (pre)configured number of dedicated PRBs used for PSFCH transmission. The transmission power for each PSFCH on the K3 dedicated PRBs is given by the following formula. , in The existing RRC parameter indicates the amount of dedicated PRB used for PSFCH. numRefPRBOfInterlace Given, P PSFCH,one It is the power used to transmit K3 PRBs for PSFCH transmission, P O,PSFCH It is set in the sidelink power control field dl-P0-PSFCH The defined nominal power (pre-)configured value, K3 is the (pre-)configured number of PRBs used for PSFCH transmission, α PSFCH It is set in the sidelink power control field dl-alpha- PSFCH Defined path loss (pre)configured values, where μ is the set of parameters for the side link (e.g., μ=0 for a 15kHz subcarrier spacing and μ=1 for a 30kHz subcarrier spacing), and PL is the downlink path loss.

[0110] The aforementioned equation determines the PSFCH transmission power on a dedicated PRB based on the (pre)configured number of dedicated PRBs used for PSFCH transmission.

[0111] For the PSFCH occupying the common interleaving and K3 dedicated PRBs, the following procedure can be applied to determine the transmit power of the PSFCH transmission on the dedicated PRBs and the transmit power of the PSFCH on the common interleaving. The transmit power on the dedicated PRB for each PSFCH transmission is determined by the following: ,in The existing RRC parameter indicates the number of dedicated PRBs sent for PSFCH. numDedicatedPRBsForPSFCH Provided.

[0112] At 704, method 700 includes adjusting the PSFCH transmit power on a dedicated PRB based on PSD limits and multiple PSFCH transmits. If the transmit power of each dedicated PRB (e.g., If the value is greater than 10dBm (e.g., PSD limit), then Tx UE can Update / Downgrade to dBm. According to ETSI specifications, the maximum PSD is limited to 10 dBm / MHz in the 5150MHz to 5350MHz band and 17 dBm / MHz in the 5470MHz to 5725MHz band. If the transmit power of the PRB on dedicated interleaving exceeds this limit, the upper limit of the transmit power is determined by the PSD limit.

[0113] According to the Rel-16 NR side link, the number of PSFCH transmissions simultaneously is determined by the following: The number of scheduled PSFCH transmissions The maximum number of PSFCH messages sent and the transmit power of each PSFCH .if The upper limit of the value is further limited due to the PSD limit, so the number of PSFCHs sent at the same time can be increased.

[0114] The maximum transmit power on a dedicated interleaved PRB is limited by the PSD limit. Specifically, The upper limit is determined by (PSD limit + The transmit power on the PRB is limited by the PSD limit. For a PSFCH that occupies a dedicated interleaving, The upper limit is determined by (PSD limit + )limited.

[0115] For PSFCH that occupies common interleaving and K3 dedicated PRBs The upper limit is determined by (PSD limit + )limited. The upper limit is determined by (PSD limit + ) limited, of which It refers to the common interleaved transmission power in terms of time. The upper limit is determined by (PSD limit + ) limited, of which It is the transmission power on the common interleaving.

[0116] If used for scheduled PSFCH transmission Each dedicated RB is separated by less than 1MHz, and if If the value is greater than 10 dBm (e.g., PSD limit), a dedicated RB used for a PSFCH transmission with the lowest priority may be discarded. The comparison with the PSD limit and the discarding of the lowest priority RB can continue until the remaining L' dedicated RBs for the scheduled PSFCH transmission are available, for example, No more than 10 dBm.

[0117] If the PSFCH PRBs have the same priority, the UE can determine which dedicated RB to discard. Otherwise, the UE can discard the dedicated RB associated with the lower priority PSFCH.

[0118] At 706, method 700 includes determining the transmit power of the common-interleaved RB and the transmit power of the dedicated PRB. First, the temporally common-interleaved transmit power can be determined as follows: , in It is the number of PRBs that are commonly interwoven in each RB set, and β It is the transmit power offset between the public PRB and the private PRB. It is the number of PRBs in the common interleaving based on the (pre)configured interleaving index, and This is the number of RB sets used for common interleaving transmission. When it is determined that PSFCH transmission will occur simultaneously, this maximum transmission power is reserved for common interleaving on multiple RB sets.

[0119] In some specific implementations, the number of PRBs in the common interleaving of each RB set It is 10 PRBs, or the minimum number of PRBs per interleaved resource pool / sidelink BWP.

[0120] In some specific implementations, It is 11 PRBs, or the maximum number of PRBs per interleaving in the resource pool / sidelink BWP.

[0121] In some specific implementations, This is the number of PRBs (pre-)configured in the resource pool (e.g., 10 or 11 PRBs). The (pre-)configured number may be related to the number of PRBs used for each interleaving determined by the sidelink TBS (e.g., parameters). numRefPRBOfInterlace (Same or different)

[0122] In some specific implementations, This is the number of PRBs (pre-)configured in the side-link BWP (e.g., 10 or 11 PRBs). The (pre-)configured number may be related to the number of PRBs used for each interleaving determined by the side-link TBS (e.g., parameters). numRefPRBOfInterlace (Same or different)

[0123] In some specific implementations, This is the actual number of PRBs based on the (pre)configured interleaving index, where R R is the number of RB sets used for common interleaving transmission. For example, R could be a (pre)configured resource pool value; or R could be the maximum possible RB set on which the UE can schedule to transmit PSFCH; or R could be the total number of RB sets in the resource pool, where... It is P common With P dedicated The (pre)configured offset between them.

[0124] At 708, method 700 includes determining which PSFCHs to transmit based on UE capabilities and total transmit power limits. To this end, Can be replaced with At 710, method 700 involves determining the number of simultaneous PSFCH transmissions. According to the Rel-16 NR side link, the number of simultaneous PSFCH transmissions is determined by the following: The number of scheduled PSFCH transmissions The maximum number of PSFCH messages sent and the transmit power of each PSFCH This process can be reused, with modifications as follows: Replace with ,and Replace with .

[0125] If PSFCH transmissions for PSSCH / PSCCH transmissions are sent on multiple RB sets to maintain COT, and both PSSCH / PSCCH transmissions and PSFCH transmissions are supported on multiple RB sets, then a PSFCH transmission is considered as multiple PSFCH transmissions, one for each RB set.

[0126] Figure 7BA flowchart illustrating an example method 701 according to some specific implementation is provided. For clarity, the following description generally describes method 701 within the context of the other figures in this specification. For example, method 701 may be derived from... Figure 4 The method 701 may be executed using UE 405 or any suitable system, environment, software, hardware, or a combination thereof. In some specific implementations, the various steps of method 701 may be run in parallel, in combination, in cycles, or in any order. The example method 701 shown in Figure 7 may be modified or reconfigured to include additional, fewer, or different steps (not shown in Figure 7) that can be performed in the order shown or in a different order.

[0127] At 714, method 701 includes receiving control signaling that configures a sidelink transmission structure for PSFCH transmission and one or more path loss-based power control parameters.

[0128] At 716, method 701 includes determining the number of PRBs used for PSFCH transmission based on the sidelink transmission structure.

[0129] At 718, method 701 includes determining the transmission power for at least a subset of the PRB based on at least one or more path loss-based power control parameters.

[0130] At 720, method 701 includes transmitting the PSFCH using a subset of the PRB with the determined transmit power.

[0131] Figure 8 This is a schematic diagram illustrating the association of PSFCH between two PSSCH or PSCCH transmissions sent on different RB sets according to some specific embodiments of this disclosure.

[0132] Once the PSFCH transmission set for simultaneous transmission is determined, the TX UE can determine the number of PRBs in the common interleaving used for transmission. Considering that the common interleaving PRBs and dedicated PRBs are within the same 1MHz bandwidth, the UE transmits on the dedicated PRBs while satisfying the OCB constraint. The transmission power on the common interleaving can be determined as follows: , in M is the number of common interleaved PRBs to be transmitted (e.g., PRBs not within the 1MHz bandwidth of any dedicated PRB), and M is counted on multiple RB sets in the resource pool as well as on PRBs skipped due to the 1MHz bandwidth of the dedicated PRB.

[0133] It has HARQ-ACK information and collision information Each scheduled PSFCH is sent and can send up to [number] times. UEs with PSFCH, on carrier Active side link BWP Timing of PSFCH transmission The number of PSFCH messages sent simultaneously across all resource pools. and sending to PSFCH power ( ) determined as [dBm] If provided dl-P0-PSFCH If the UE supports using this parameter and provides it, then yes dl-P0-PSFCH-r17 The value is; otherwise it is dl-P0-PSFCH-r16 (If provided); yes dl-Alpha-PSFCH The value (if provided); otherwise when the active sidelink BWP is in the serving cell When, , Except in the following cases: when the UE is configured to be in the serving cell When monitoring the PDCCH for DCI format 0_0, the reference signal resource is used by the UE to determine the serving cell. The DCI format 0_0 in the resource is the power transmitted by the scheduled PUSCH, and when the UE is not configured to be in the serving cell. When monitoring the PDCCH used for DCI format 0_0, the RS resource is the resource corresponding to the SS / PBCH block used by the UE to obtain the MIB.

[0134] In the aforementioned equation, if no [further details are provided] sl-PSFCH-Type , Then it equals 1; or if sl- PSFCH-Type = "type1" equals numRefPRBOfInterlace The value; or if sl-PSFCH-Type = "type2" means numDedicatedPRBsForPSFCH The value of. If sl-PSFCH-Type = type2 The transmit power of the temporary PSFCH under common interleaving is given as follows: [dBm] in It is the number of PRBs with index sl-PSFCH-Type2-CommonInterlace. Depend on sl-PSFCH-Type2-PowerOffset Provide, and This is the number of RB sets used for transmission on the first interleaving. Otherwise, .

[0135] if And if ,in It is aimed at The number of PSFCH transmissions is determined according to [8-1, TS 38.101-1], and the number of PSFCH transmissions is given as follows: and [dBm].

[0136] Otherwise, Tx UE determines autonomously. Each PSFCH transmission is first ordered in ascending order of priority field values ​​on PSFCH transmissions with HARQ-ACK information (if any), and then in ascending order of priority values ​​on PSFCH transmissions with collision information (if any), such that... ,in (against () is a priority value for PSFCH with HARQ-ACK information. The number of PSFCHs, and (against () has a priority value for PSFCH containing conflicting information. The number of PSFCHs, and It is defined as the maximum value that satisfies the following formula: in It is aimed at The number of all PSFCH transmissions (if any) is determined according to [8-1, TS 38.101-1]; otherwise, it is zero.

[0137] In the aforementioned equation, [dBm], where It is aimed at One PSFCH is sent to confirm.

[0138] Alternatively, if Then the UE can autonomously select according to the ascending order of the corresponding priority field values. Send one PSFCH, of which It is aimed at One PSFCH is sent to confirm, and [dBm].

[0139] Otherwise, the UE chooses autonomously. Each PSFCH transmission, in ascending order of priority field values, is sent with HARQ-ACK information, and then in ascending order of priority values, in PSFCH transmissions with collision information (if any), such that... ,in , It is a priority value for PSFCH with HARQ-ACK information. The number of PSFCHs, and , It has a priority value for PSFCH containing conflicting information. The number of PSFCHs, and It is defined as the maximum value that satisfies the following formula: ,in It is aimed at The number of all PSFCH transmissions (if any) is determined; otherwise, it is zero.

[0140] In the foregoing description, the transmission power is given as follows: [dBm], in It is aimed at The PSFCH is transmitted simultaneously and determined. Alternatively, the transmission power can be given as follows: [dBm], Among them, the UE determines autonomously. Each PSFCH transmission, in ascending order of priority field values, is sent with HARQ-ACK information, and then in ascending order of priority values, in PSFCH transmissions with collision information (if any), such that... And among them It is aimed at One PSFCH is sent to confirm.

[0141] if sl-PSFCH-Type= "type2" means the second interleaving is used for PSFCH transmission. The power is And the first interleaved PSFCH is sent. The power is given as follows: , in This refers to the number of PRBs to be transmitted in the first interleaving. The maximum transmit power on the PRBs is limited by the PSD limit. For PSFCHs occupying dedicated interleaving, The upper limit is determined by (PSD limit + () Limitation. For PSFCH that occupies common interleaving and K3 dedicated PRBs, The upper limit is limited by (PSD) + )limited. The upper limit is limited by (PSD) + )limited. The upper limit is limited by (PSD) + )limited.

[0142] Various aspects of this disclosure support the use of PSFCH-like sequences to maintain COT. Some aspects of this disclosure relate to the design for dummy PSFCH transmission. More specifically, some aspects relate to power control of the dummy PSFCH (without a dedicated PRB for PSFCH transmission). This involves determining the common interleaving transmission power (for common interleaving transmission of the PSFCH). The transmission power can be expressed as: , in It is the number of PRBs that are commonly interwoven, among which R It is the number of RB sets that the UE transmits on it for the virtual PSFCH.

[0143] if Greater than 10dBm (e.g., PSD limit). Can be updated / downgraded to dBm.

[0144] Several aspects involve prioritizing dummy PSFCHs with uplink transmissions. Following existing prioritization rules, the priority of a dummy PSFCH value can be determined according to one or more of the following rules: In some implementations, the resource pool uses a (pre)configured priority value for dummy PSFCHs. In some implementations, the same priority as the first PSSCH used to initiate a COT can be used. In some implementations, the same priority as PSSCHs transmitted after the PSFCH timing used for dummy PSFCH transmission can be used. In some implementations, the same priority as PSSCHs transmitted on the same time slot as the PSFCH timing used for dummy PSFCH transmission can be used. In some implementations, the priority is always lower than that of uplink transmissions.

[0145] Some aspects of this disclosure relate to UE behavior for sending or receiving PSFCH for transmission on the PSSCH MCSt (in the case of a single TB). For a single TB on the MCSt, the UE's behavior for sending PSFCH may include attempting to send PSFCH on the PSFCH timing corresponding to the PSSCH MCSt only if the UE failed to send on the previous PSFCH timing, for example, due to LBT failure or due to uplink / sidelink priority ordering.

[0146] For a UE receiving a PSFCH via unicast, the UE attempts to monitor all PSFCH timings corresponding to the PSSCH transmission in the MCSt. If a PSFCH is detected, the UE can avoid monitoring the following PSFCH timings (if any) corresponding to the PSSCH MCSs transmission. Figure 9 This is a schematic diagram illustrating UE monitoring of received PSFCH transmissions according to some specific implementations of this disclosure.

[0147] If the UE receives a PSFCH transmission, it reports the same value to the higher layer as the value of the HARQ-ACK information determined from the PSFCH transmission. For multicast (ACK / NACK), the UE may attempt to monitor all PSFCH transmission opportunities corresponding to the PSSCH transmission in the MCSt. If the UE detects a PSFCH transmission from a PSFCH transmitter, it may skip PSFCH detection for the following PSFCH transmission opportunities for that PSFCH transmitter (if any). If an ACK has been detected from at least one PSFCH opportunity of each of all expected PSSCH receivers, the UE may report an ACK to the higher layer; otherwise, the UE may report a NACK to the higher layer.

[0148] Some aspects of this disclosure relate to multiple consecutive time slot transmissions (MCSt) in Mode 1. Figure 10 This is a schematic diagram illustrating support for MCSt in Mode 1 according to some specific embodiments of this disclosure. DCI format 3_0 may include a new field to indicate the number of consecutive time slots or the number of HARQ processes. More specifically, this field may indicate the number of consecutive time slots currently authorized for the sidelink. In authorization type 1 of the sidelink configuration, the new field may indicate the number of consecutive time slots. For example, in the information element... SL-ConfiguredGrantConfig In the middle, parameters rrc-ConfiguredSidelinkGrant It can have a new field to indicate the number of consecutive time slots.

[0149] To support sidelink operation in unlicensed spectrum with MCSt in Mode 1, a new field indicating the number of HARQ processes can be added to DCI format 3_0, where the field size is [size missing]. Units digit. This may involve expanding the size of the new data indicator field in DCI format 3_0. Ones place, of which This is the maximum number of consecutive time slots used for MCSt.

[0150] DCI format 3_0 is used for scheduling NR PSCCH and NR PSSCH within a cell. The following information is transmitted via DCI format 3_0 with a CRC scrambled by SL-RNTI or SL-CS-RNTI: resource pool index bits, where I It is determined by higher-level parameters sl-TxPoolScheduling (If configured) and sl-DiscTxPoolScheduling (If configured) The total number of resource pools configured for sending; determined by higher-level parameters. sl-DCI-ToSL-Trans Defined time interval (3 bits); HARQ process number (4 bits); Occupied The new data indicator for the unit digit, where if configured SL-BWP- Config Higher-level parameters transmissionStructureForPSCCHandPSSCH , This is the maximum number of consecutive time slots used for MCSt (otherwise 1 bit); occupies The lowest index assigned to the sub-channel in the initial transmission; the lowest index assigned to the RB set in the initial transmission, if... SL-BWP-Config Higher-level parameters transmissionStructureForPSCCHandPSSCH Configured as "interlaceRB", this minimum index usage The last digit (otherwise 0); and the number of HARQ processes used for MCSt, if configured. SL-BWP- Config Higher-level parameters transmissionStructureForPSCCHandPSSCH This quantity occupies The unit digit (otherwise it is 0).

[0151] Figure 11 Example UE 1100 is illustrated according to some specific implementations. UE 1100 may be similar to Figure 4 The UE 405 is essentially interchangeable with this UE.

[0152] UE 1100 can be any mobile or non-mobile computing device, such as mobile phones, computers, tablets, industrial wireless sensors (e.g., microphones, pressure sensors, thermometers, motion sensors, accelerometers, stock sensors, voltmeters / ammeters, etc.), video devices (e.g., cameras, camcorders, etc.), wearable devices (e.g., smartwatches), and loosely coupled IoT devices.

[0153] UE 1100 may include a processor 1102, RF interface circuitry 1104, memory / storage device 1106, user interface 1108, sensor 1110, drive circuitry 1112, power management integrated circuit (PMIC) 1114, one or more antennas 1116, and battery 1118. The components of UE 1100 may be implemented as integrated circuits (ICs), portions of integrated circuits, discrete electronic devices or other modules, logic components, hardware, software, firmware, or combinations thereof. Figure 11 The block diagram is intended to show a high-level view of some of the components of the UE 1100. However, some of the components shown may be omitted, additional components may be present, and different arrangements of the components shown may occur in other specific implementations.

[0154] The components of UE 1100 can be coupled to various other components via one or more interconnects 1120, which can represent any type of interface, input / output, bus (local, system, or extension), transmit line, trace, optical connection, etc., allowing various circuit components (on common or different chips or chipsets) to interact with each other.

[0155] Processor 1102 may include processor circuitry, such as, for example, baseband processor circuitry (BB) 1122A, central processing unit circuitry (CPU) 1122B, and graphics processing unit circuitry (GPU) 1122C. Processor 1102 may include any type of circuitry or processor circuitry that executes or otherwise operates computer-executable instructions (such as program code, software modules, or functional processes from memory / storage device 1106) to cause UE 1100 to perform the operations described herein.

[0156] In some implementations, the baseband processor circuit 1122A can access the communication protocol stack 1124 in the memory / storage device 1106 to communicate over a 3GPP-compatible network. Generally, the baseband processor circuit 1122A can access the communication protocol stack to perform user plane functions at the Physical (PHY) layer, Medium Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Serving Data Adaptation Protocol (SDAP) layer, and PDU layer; and to perform control plane functions at the PHY layer, MAC layer, RLC layer, PDCP layer, RRC layer, and non-access strata. In some implementations, PHY layer operations may additionally / optionally be performed by components of the RF interface circuit 1104. The baseband processor circuit 1122A can generate or process baseband signals or waveforms carrying information in a 3GPP-compatible network. In some specific implementations, the waveform used for NR can be based on Cyclic Prefix Orthogonal Frequency Division Multiplexing (OFDM) "CP-OFDM" in the uplink or downlink, and Discrete Fourier Transform Extended OFDM "DFT-S-OFDM" in the uplink.

[0157] Memory / storage device 1106 may include one or more non-transitory computer-readable media, including instructions (e.g., a communication protocol stack 1124) that can be executed by one or more processors in processor 1102 to cause UE 1100 to perform the various operations described herein. Memory / storage device 1106 includes any type of volatile or non-volatile memory that can be distributed throughout UE 1100. In some specific implementations, some memory / storage devices in memory / storage device 1106 may be located on processor 1102 itself (e.g., L1 cache and L2 cache), while other memory / storage devices 1106 may be located external to processor 1102 but accessible via a memory interface. The memory / storage device 1106 may include any suitable volatile or non-volatile memory, such as, but not limited to, dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state memory, or any other type of memory device technology.

[0158] RF interface circuitry 1104 may include transceiver circuitry and a radio frequency front-end module (RFEM) that allows UE 1100 to communicate with other devices via a radio access network. RF interface circuitry 1104 may include various components arranged in the transmit or receive path. These components may include, for example, switches, mixers, amplifiers, filters, synthesizer circuitry, control circuitry, etc.

[0159] In the receiving path, the RFEM can receive the radiated signal from the air interface via antenna 1116 and continue to filter and amplify the signal (using a low-noise amplifier). This signal can be provided to the receiver of the transceiver, which down-converts the RF signal into a baseband signal, which is then provided to the baseband processor of processor 1102.

[0160] In the transmission path, the transceiver's transmitter up-converts the baseband signal received from the baseband processor and provides the RF signal to the RFEM. The RFEM can amplify the RF signal via a power amplifier before it is radiated across the air interface via antenna 1116. In various implementations, the RF interface circuitry 1104 can be configured to transmit / receive signals in a manner compatible with NR access technologies.

[0161] Antenna 1116 may include one or more antenna elements to convert electrical signals into radio waves for travel through the air and to convert received radio waves back into electrical signals. These antenna elements may be arranged in one or more antenna panels. Antenna 1116 may have omnidirectional, directional, or combinations thereof antenna panels to enable beamforming and multiple-input multiple-output (MIMO) communication. Antenna 1116 may include microstrip antennas, printed antennas fabricated on the surface of one or more printed circuit boards, patch antennas, phased array antennas, etc. Antenna 1116 may have one or more panels designed for a specific frequency band including the frequency bands in FR1 or FR2.

[0162] User interface 1108 includes various input / output (I / O) devices designed to enable a user to interact with UE 1100. User interface 1108 includes input device circuitry and output device circuitry. Input device circuitry includes any physical or virtual components for accepting input, particularly including one or more physical or virtual buttons (e.g., a reset button), a physical keyboard, a keypad, a mouse, a touchpad, a touchscreen, a microphone, a scanner, a headset, etc. Output device circuitry includes any physical or virtual components for displaying information or otherwise conveying information (such as sensor readings, actuator positions, or other similar information). Output device circuitry may include any number or combination of audio or visual displays, particularly including one or more simple visual outputs / indicators (e.g., binary status indicators such as light-emitting diodes "LEDs," and multi-character visual outputs), or more complex outputs such as display devices or touchscreens (e.g., liquid crystal displays "LCDs," LED displays, quantum dot displays, projectors, etc.), wherein the output of characters, graphics, multimedia objects, etc., is generated or produced through the operation of UE 1100.

[0163] Sensor 1110 may include devices, modules, or subsystems intended to detect events or changes in their environment and transmit information (sensor data) about the detected events to other devices, modules, subsystems, etc. Examples of such sensors include, in particular: inertial measurement units including accelerometers, gyroscopes, or magnetometers; microelectromechanical systems (MEMS) or nanoelectromechanical systems (NEMS) including triaxial accelerometers, triaxial gyroscopes, or magnetometers; level sensors; temperature sensors (e.g., thermistors); pressure sensors; image capture devices (e.g., cameras or lensless aperture devices); light detection and ranging sensors; proximity sensors (e.g., infrared radiation detectors, etc.); depth sensors; ambient light sensors; ultrasonic transceivers; microphones or other similar audio capture devices; and so on.

[0164] The driving circuitry 1112 may include software and hardware elements that operate to control a specific device embedded in, attached to, or otherwise communicatively coupled to the UE 1100. The driving circuitry 1112 may include various drivers that allow other components to interact with or control various input / output (I / O) devices that may exist within or be connected to the UE 1100. For example, the driving circuitry 1112 may include: a display driver for controlling and allowing access to a display device; a touchscreen driver for controlling and allowing access to a touchscreen interface; a sensor driver for obtaining sensor readings of sensor 1110 and controlling and allowing access to sensor 1110; a driver for obtaining actuator positions of electromechanical components or controlling and allowing access to electromechanical components; a camera driver for controlling and allowing access to an embedded image capture device; and an audio driver for controlling and allowing access to one or more audio devices.

[0165] PMIC 1114 manages the power supplied to various components of UE 1100. Specifically, relative to processor 1102, PMIC 1114 controls power source selection, voltage scaling, battery charging, or DC-DC conversion.

[0166] In some implementations, PMIC 1114 may control various power-saving mechanisms of UE 1100 or otherwise become part of various power-saving mechanisms of the UE. Battery 1118 may power UE 1100, but in some examples, UE 1100 may be installed and deployed in a fixed location and may have a power source coupled to the power grid. Battery 1118 may be a lithium-ion battery, a metal-air battery such as a zinc-air battery, an aluminum-air battery, a lithium-air battery, etc. In some implementations, such as in vehicle-based applications, battery 1118 may be a typical lead-acid automotive battery.

[0167] Figure 12An example access node 1200 (e.g., a base station or gNB) is illustrated according to some specific implementations. Access node 1200 may be similar to base station 410 and is substantially interchangeable with it. Access node 1200 may include processor 1202, RF interface circuitry 1204, core network (CN) interface circuitry 1206, memory / storage device circuitry 1208, and one or more antennas 1210.

[0168] Components of access node 1200 can be coupled to various other components via one or more interconnects 1212. Processor 1202, RF interface circuitry 1204, memory / storage device circuitry 1208 (including communication protocol stack 1214), antenna 1210, and interconnects 1212 can be analogous to those of other components. Figure 11 Components with similar names as shown and described. For example, processor 1202 may include processor circuitry such as, for example, baseband processor circuitry (BB) 1216A, central processing unit circuitry (CPU) 1216B, and graphics processing unit circuitry (GPU) 1216C.

[0169] The CN interface circuit 1206 can provide connectivity to a core network (e.g., a 5GC using a 5G core network (5GC) compatible network interface protocol, such as carrier Ethernet or some other suitable protocol). Network connectivity can be provided to / from access node 1200 via fiber optic or wireless backhaul. The CN interface circuit 1206 may include one or more dedicated processors or FPGAs for communicating using one or more of the aforementioned protocols. In some implementations, the CN interface circuit 1206 may include multiple controllers for providing connectivity to other networks using the same or different protocols.

[0170] As used herein, the terms "access node," "access point," etc., can describe equipment that provides radio baseband functionality for data and / or voice connections between a network and one or more users. These access nodes can be referred to as BS, gNB, RAN node, eNB, NodeB, RSU, TRxP, or TRP, etc., and can include ground stations (e.g., ground access points) or satellite stations that provide coverage within a geographic area (e.g., a cell). As used herein, the terms "NG RAN node," etc., can refer to an access node 1200 (e.g., a gNB) operating in an NR or 5G system, and the terms "E-UTRAN node," etc., can refer to an access node 1200 (e.g., an eNB) operating in an LTE or 4G system. Depending on various specific implementations, the access node 1200 can be implemented as one or more of the following: dedicated physical equipment such as a macro cell base station, and / or a low-power (LP) base station for providing a smaller coverage area, smaller user capacity, or higher bandwidth compared to a macro cell, such as a femtocell, picocell, or other similar cell.

[0171] In some specific implementations, all or part of the access node 1200 may be implemented as one or more software entities running on a server computer as part of a virtual network, which may be referred to as a CRAN and / or a virtual baseband unit pool (vBBUP). In a V2X scenario, the access node 1200 may be a "roadside unit" or act as a "roadside unit". The term "roadside unit" or "RSU" may refer to any traffic infrastructure entity used for V2X communication. An RSU may be implemented or be implemented by a suitable RAN node or a UE that is camped (or relatively camped), wherein an RSU implemented or be implemented by a UE may be referred to as a "UE-type RSU", an RSU implemented or be implemented by an eNB may be referred to as an "eNB-type RSU", an RSU implemented or be implemented by a gNB may be referred to as a "gNB-type RSU", and so on.

[0172] For ease of description, various components may be described as performing one or more tasks. Such descriptions should be interpreted as including the phrase "configured to". Statements describing a component as configured to perform one or more tasks are explicitly intended not to invoke the interpretation of 35 USC § 112(f) for that component.

[0173] For one or more embodiments, at least one of the components illustrated in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, or methods described in the Embodiments section below. For example, the baseband circuitry described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples below. Similarly, circuitry associated with the UE, base station, network element, etc., described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples shown below.

[0174] Example 1 includes one or more processors configured to perform operations including: receiving control signaling configuring a sidelink transmission structure for PSFCH transmission and one or more path loss-based power control parameters; determining the number of PRBs for PSFCH transmission based on the sidelink transmission structure; determining a transmission power for at least a subset of the PRBs based at least on the one or more path loss-based power control parameters; and instructing RF circuitry to transmit the PSFCH transmission via the determined transmission power through the subset of the PRBs.

[0175] Example 2 includes one or more processors according to Example 1, wherein the sidelink transmission structure for transmitting the PSFCH includes a dedicated interleaved sidelink transmission structure or a common interleaved sidelink transmission structure.

[0176] Example 3 includes one or more processors according to any one of Examples 1 to 2, wherein, for operation without shared spectrum channel access, the transmit power is suitable for at least one PRB transmitted by the PSFCH.

[0177] Example 4 includes one or more processors according to any one of Examples 1 to 3, wherein determining the number of PRBs includes: determining a first interleaving of the PRBs for the PSFCH transmission based on a dedicated interleaving sidelink transmission structure.

[0178] Example 5 includes one or more processors according to Example 4, wherein for operation with shared spectrum channel access, the transmit power is applicable to each PRB in the first interleaving of the PRB.

[0179] Example 6 includes one or more processors according to any one of Examples 1 to 5, wherein determining the number of PRBs includes: determining a first interleaving and a second interleaving of PRBs for PSFCH transmission according to a common interleaving sidelink transmission scheme.

[0180] Example 7 includes one or more processors according to Example 6, wherein for operation with shared spectrum channel access, the transmit power is applicable to each PRB in the second interleaving of the PRB.

[0181] Example 8 includes one or more processors according to any one of Examples 6 to 7, wherein the transmit power includes the transmit power on the PRB of both the first interleaving and the second interleaving.

[0182] Example 9 includes one or more processors according to any one of Examples 1 to 8, wherein receiving the control signaling includes: receiving a sidelink resource pool configuration, the sidelink resource pool configuration indicating whether the PSFCH transmission occupies (i) common interleaving and multiple dedicated PRBs or (ii) dedicated interleaving.

[0183] Example 10 includes one or more processors according to Example 9, wherein the sidelink resource pool configuration further indicates the number of dedicated PRBs for the PSFCH transmission.

[0184] Example 11 includes one or more processors according to any one of Examples 1 to 10, wherein receiving the control signaling includes: receiving a sidelink resource pool configuration, the sidelink resource pool configuration indicating one or both of an α value or a power value for path loss-based power control for PSFCH transmission.

[0185] Example 12 includes one or more processors according to any one of Examples 1 to 11, wherein determining the number of PRBs for PSFCH transmission includes determining the number of PRBs based at least on the PSFCH power offset value.

[0186] Example 13 includes one or more processors according to any one of Examples 1 to 12, wherein determining the number of PRBs for the PSFCH transmission includes: determining the number of PRBs based at least on the maximum number of PSFCH transmissions supported by the UE.

[0187] Example 14 includes one or more processors according to any one of Examples 1 to 13, wherein determining the transmit power for at least the subset of the PRB includes: determining the transmit power based on the maximum transmit power configured for the UE.

[0188] Example 15 includes one or more processors according to any one of Examples 1 to 14, wherein determining the transmit power for at least the subset of the PRB includes: determining the transmit power based at least on a path loss estimate of the active side link bandwidth portion (BWP) of the subset including the PRB.

[0189] Example 16 is a method comprising: receiving control signaling configuring a sidelink transmission structure for PSFCH transmission and one or more path loss-based power control parameters; determining the number of PRBs for PSFCH transmission based on the sidelink transmission structure; determining a transmission power for at least a subset of the PRBs based at least on the one or more path loss-based power control parameters; and inducing transmission of the PSFCH transmission via the subset of the PRBs using the determined transmission power.

[0190] Example 17 includes the method according to Example 16, wherein the sidelink transmission structure for the PSFCH transmission includes a dedicated interleaved sidelink transmission structure or a common interleaved sidelink transmission structure.

[0191] Example 18 includes the method according to any one of Examples 16 to 17, wherein, for operations without shared spectrum channel access, the transmit power is applicable to at least one PRB transmitted by the PSFCH.

[0192] Example 19 includes the method according to any one of Examples 16 to 18, wherein determining the number of PRBs includes determining the first interleaving of the PRBs for the PSFCH transmission based on the dedicated interleaving sidelink transmission structure.

[0193] Example 20 is a UE, the UE comprising: one or more processors; and a memory storing instructions that, when executed by the one or more processors, cause the UE to perform operations including: receiving control signaling configuring a sidelink transmission structure for PSFCH transmission and one or more path loss-based power control parameters; determining the number of PRBs for PSFCH transmission based on the sidelink transmission structure; determining a transmission power for at least a subset of the PRBs based at least on the one or more path loss-based power control parameters; and transmitting the PSFCH transmission via the subset of the PRBs using the determined transmission power.

[0194] The previously described embodiments can be implemented using: a computer-implemented method; a non-transitory computer-readable medium storing computer-readable instructions to perform the computer-implemented method; and a computer system including a computer memory interoperably coupled to a hardware processor configured to perform the computer-implemented method or instructions stored on the non-transitory computer-readable medium.

[0195] A system (e.g., a base station, a device including one or more baseband processors, etc.) may be configured to perform a specific operation or action by means of software, firmware, hardware, or a combination thereof installed on the system that causes the system to perform actions in operation. The operation or action performed by the system may include the method according to any one of the foregoing embodiments.

[0196] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific embodiments provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise forms disclosed. In view of the teachings above, modifications and variations are possible, or modifications and variations may be obtained from practice of various embodiments.

[0197] Although the above embodiments have been described in considerable detail, many variations and modifications will become apparent to those skilled in the art once the above disclosure is fully understood. It is intended that the following claims be construed as encompassing all such variations and modifications.

[0198] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of authorized use should be clearly explained to users.

Claims

1. One or more processors, said processors being configured to perform operations including: Receive control signaling, which configures the sidelink transmission structure for transmission of the Physical Sidelink Feedback Channel (PSFCH) and one or more power control parameters based on path loss; The number of physical resource blocks (PRBs) used for the PSFCH transmission is determined at least in part based on the sidelink transmission structure. The transmit power for at least a subset of the PRB is determined based at least on one or more path loss-based power control parameters. as well as The radio frequency (RF) circuit is instructed to transmit the PSFCH using the determined transmit power via the subset of the PRB.

2. The processor of claim 1, wherein the sidelink transmission structure for transmitting the PSFCH comprises a dedicated interleaved sidelink transmission structure or a common interleaved sidelink transmission structure.

3. The processor of claim 1, wherein for operation without shared spectrum channel access, the transmit power is applicable to at least one PRB transmitted by the PSFCH.

4. The processor of claim 1 or more, wherein determining the number of PRBs comprises: The first interleaving of the PRB used for the PSFCH transmission is determined based on the dedicated interleaving sidelink transmission structure.

5. One or more processors according to claim 4, wherein for operation with shared spectrum channel access, the transmit power is applicable to each PRB in the first interleaving of the PRB.

6. The processor of claim 1 or more, wherein determining the number of PRBs comprises: The first interleaving and the second interleaving of the PRB used for PSFCH transmission are determined according to the common interleaving sidelink transmission scheme.

7. One or more processors according to claim 6, wherein for operation with shared spectrum channel access, the transmit power is applicable to each PRB in the second interleaving of the PRB.

8. One or more processors according to claim 6, wherein the transmit power includes the transmit power on the PRB of both the first interleaving and the second interleaving.

9. The processor of claim 1 or more, wherein receiving the control signaling comprises: The receiving side link resource pool configuration indicates whether the PSFCH transmission occupies (i) common interleaving and multiple dedicated PRBs or (ii) dedicated interleaving.

10. One or more processors according to claim 9, wherein the sidelink resource pool configuration further indicates the number of dedicated PRBs for the PSFCH transmission.

11. The processor of claim 1 or more, wherein receiving the control signaling comprises: The receiving side link resource pool configuration indicates one or both of an α value or a power value for path loss-based power control used for PSFCH transmission.

12. The processor of claim 1 or more, wherein determining the number of PRBs for the PSFCH transmission comprises: The number of PRBs is determined at least based on the PSFCH power offset value.

13. The processor of claim 1 or more, wherein determining the number of PRBs for the PSFCH transmission comprises: The number of PRBs is determined at least based on the maximum number of PSFCHs sent by the User Equipment (UE).

14. The processor of claim 1, wherein determining the transmit power for at least the subset of the PRB comprises: The transmission power is determined at least in part based on the maximum transmission power configured for the user equipment (UE).

15. One or more processors according to claim 1, wherein determining the transmit power for at least the subset of the PRB comprises: The transmit power is determined at least based on the path loss estimate of the active side link bandwidth portion (BWP) of the subset including the PRB.

16. A method, the method comprising: Receive control signaling, which configures the sidelink transmission structure for transmission of the Physical Sidelink Feedback Channel (PSFCH) and one or more power control parameters based on path loss; The number of physical resource blocks (PRBs) used for the PSFCH transmission is determined at least in part based on the sidelink transmission structure. The transmit power for at least a subset of the PRB is determined based at least on one or more path loss-based power control parameters. as well as The transmission of the PSFCH is caused by using the determined transmission power via the subset of the PRB.

17. The method of claim 16, wherein the sidelink transmission structure for transmitting the PSFCH comprises a dedicated interleaved sidelink transmission structure or a common interleaved sidelink transmission structure.

18. The method of claim 16, wherein for operations without shared spectrum channel access, the transmit power is applicable to at least one PRB transmitted by the PSFCH.

19. The method of claim 16, wherein determining the number of PRBs comprises determining a first interleaving of the PRBs for the PSFCH transmission based on a dedicated interleaving sidelink transmission structure.

20. A user equipment (UE), the user equipment (UE) comprising: One or more processors; as well as The memory stores instructions that, when executed by the one or more processors, cause the UE to perform operations including the following: Receive control signaling, which configures the sidelink transmission structure for transmission of the Physical Sidelink Feedback Channel (PSFCH) and one or more power control parameters based on path loss; The number of physical resource blocks (PRBs) used for the PSFCH transmission is determined at least in part based on the sidelink transmission structure. The transmit power for at least a subset of the PRB is determined based at least on one or more path loss-based power control parameters. as well as The PSFCH is transmitted using the determined transmission power via the subset of the PRB.

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