Power control for sidelink physical sidelink feedback channel transmission

Abstract

A system, method, apparatus, and computer program product for determining transmit power for common interlaced and RBs. One method may include a UE determining a PSFCH allocation for at least one dedicated RB, calculating the corresponding transmit power for the PSFCH allocation for at least one dedicated RB, and determining the allocation for a common PSFCH RB. The method further includes calculating the transmit power for the common RB based on the transmit power for dedicated resource blocks and a determined number of common resource blocks.

Description

[Technical Field]

[0001] Some exemplary embodiments may generally relate to mobile or wireless telecommunications systems, such as the 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE), 5th Generation (5G) Radio Access Technology (RAT), New Radio (NR) Access Technology, 6th Generation (6G), and / or other communication systems. For example, certain exemplary embodiments may relate to a system and / or method for determining transmit power for common interlace and resource blocks (RB). [Background technology]

[0002] Examples of mobile or wireless telecommunications systems may include radio frequency (RF) 5G RAT, Universal Mobile Communications System (UMTS) terrestrial radio access network (UTRAN), LTE Advanced UTRAN (E-UTRAN), LTE Advanced (LTE-A), LTE-A Pro, NR access technologies, and / or MultiFire Alliance. 5G wireless systems refer to next-generation (NG) radio systems and network architectures. While 5G systems are typically built on 5G NR, 5G (or NG) networks may also be built on E-UTRA radio. NR is expected to support service categories such as Enhanced Mobile Broadband (eMBB), Ultra-High Reliability Low Latency Communications (URLLC), and Massive Machine-Type Communications (mMTC). NR is expected to provide ultra-broadband, ultra-robust, low-latency connectivity, and massive networking to support the Internet of Things (IoT). Next-generation radio access network (NG-RAN) refers to a radio access network (RAN) for 5G, which can provide radio access for NR, LTE, and LTE-A. Note that a node in 5G that provides radio access functionality to user equipment (UE) (e.g., similar to node B in UTRAN or evolved node B (eNB) in LTE) may be called a next-generation node B (gNB) when built on an NR radio, and a next-generation eNB (NG-eNB) when built on an E-UTRAN radio. [Overview of the project]

[0003] According to some exemplary embodiments, the method may include the UE determining a physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The method may further include the UE calculating the corresponding transmit power for the physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The method may further include the UE determining the allocation for a common physical sidelink feedback channel resource block. The method may further include the UE calculating the transmit power for a plurality of common physical sidelink feedback channel resource blocks based on the corresponding transmit power and the determined number or allocation of a plurality of common physical sidelink feedback channel resource blocks.

[0004] According to certain exemplary embodiments, the apparatus may include means for determining a physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The apparatus may further include means for calculating the corresponding transmit power for the physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The apparatus may further include means for determining the allocation of common physical sidelink feedback channel resource blocks. The apparatus may further include means for calculating the transmit power for a plurality of common physical sidelink feedback channel resource blocks based on the corresponding transmit power and a determined number or allocation of a plurality of common physical sidelink feedback channel resource blocks.

[0005] According to various exemplary embodiments, a non-transient computer-readable medium, when executed by the device, may include program instructions causing the device to perform at least one method. The method may include determining a physical side-link feedback channel allocation for at least one dedicated physical side-link feedback channel resource block. The method may further include calculating the corresponding transmit power for the physical side-link feedback channel allocation for at least one dedicated physical side-link feedback channel resource block. The method may further include determining the allocation for a common physical side-link feedback channel resource block. The method may further include calculating the transmit power for a plurality of common physical side-link feedback channel resource blocks based on the corresponding transmit power and a determined number or allocation of a plurality of common physical side-link feedback channel resource blocks.

[0006] According to some exemplary embodiments, a computer program product may perform a method. The method may include determining a physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The method may further include calculating the corresponding transmit power for the physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The method may further include determining the allocation for a common physical sidelink feedback channel resource block. The method may further include calculating the transmit power for a plurality of common physical sidelink feedback channel resource blocks based on the corresponding transmit power and a determined number or allocation of a plurality of common physical sidelink feedback channel resource blocks.

[0007] According to certain exemplary embodiments, the apparatus may include at least one processor and at least one memory, which, when executed by at least one processor, stores instructions causing the apparatus to determine physical sidelink feedback channel allocations for at least one dedicated physical sidelink feedback channel resource block. The at least one memory and instructions may, when executed by at least one processor, cause the apparatus to calculate the corresponding transmit power for physical sidelink feedback channel allocations for at least one dedicated physical sidelink feedback channel resource block. The at least one memory and instructions may, when executed by at least one processor, cause the apparatus to determine allocations for at least one common physical sidelink feedback channel resource block. The at least one memory and instructions may, when executed by at least one processor, cause the apparatus to calculate transmit power for a plurality of common physical sidelink feedback channel resource blocks based on the corresponding transmit power and a determined number or allocation of a plurality of common physical sidelink feedback channel resource blocks.

[0008] According to various exemplary embodiments, the apparatus may include a decision circuit configured to determine a physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The apparatus may further include a calculation circuit configured to calculate the corresponding transmit power for the physical sidelink feedback channel allocation for at least one dedicated physical sidelink feedback channel resource block. The apparatus may further include a decision circuit configured to determine the allocation for a common physical sidelink feedback channel resource block. The apparatus may further include a calculation circuit configured to calculate the transmit power for a plurality of common physical sidelink feedback channel resource blocks based on the corresponding transmit power and a determined number or allocation of a plurality of common physical sidelink feedback channel resource blocks.

[0009] For a proper understanding of the exemplary embodiments, reference should be made to the accompanying drawings. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows the acquisition of channel occupancy time by the initiating device via Listen Before Talk Type 1. [Figure 2A] This figure shows a Listen Before Talk Type 2C with a gap between the two transmissions from the starting UE. [Figure 2B] This diagram shows a Listen Before Talk Type 2B with a gap between the two transmissions from the initiating UE. [Figure 2C] This figure shows a Listen Before Talk Type 2A with a gap between the two transmissions from the initiating UE. [Figure 2D] This figure shows a Listen Before Talk Type 2C with a gap between two different transmissions from the corresponding Initiating UE and Responding UE. [Figure 2E]FIG. showing type 2B of listen before talk where there is a gap between two different transmissions from the corresponding start UE and response UE. [Figure 2F] FIG. showing type 2A of listen before talk where there is a gap between two different transmissions from the corresponding start UE and response UE. [Figure 3] FIG. showing a scenario where the response device needs to acquire a new channel occupancy time. [Figure 4A] FIG. showing sidelink resource allocation mode 1. [Figure 4B] [[ID=1第十二]]FIG. showing sidelink resource allocation mode 2. [Figure 5A] FIG. showing an example of a sidelink slot structure. [Figure 5B] FIG. showing an example of a sidelink slot structure. [Figure 6] FIG. showing a sidelink slot having a physical sidelink control channel / physical sidelink shared channel and a physical sidelink feedback channel. [Figure 7] FIG. showing a physical sidelink shared channel to a physical sidelink feedback channel mapping . [Figure 8] FIG. showing an interleaved frequency division multiplexing scheme for the new radio uplink. [Figure 9A] FIG. showing a quasi-uniform interleaved frequency division multiplexed physical sidelink feedback channel for unlicensed NR (subcarrier spacing 15KHz) using a set of RBs for a secondary physical sidelink feedback channel. [Figure 9B] FIG. showing a quasi-uniform interleaved frequency division multiplexed physical sidelink feedback channel for unlicensed NR (subcarrier spacing 15KHz) using primary and secondary interleaves of a UE1 physical sidelink feedback channel. [Figure 9C]Figure showing a quasi-uniform interleaved frequency division multiplexed physical sidelink feedback channel for unlicensed NR (subcarrier spacing 15KHz) using UE2 physical sidelink feedback channel primary and secondary interleaves. [Figure 10] Figure showing an example of a 20MHz bandwidth with a 15kHz subcarrier spacing, where Interleave 1 (i.e., RB1, 11, 21, ... 91) may be used as a common interleave by 5 UEs, and RB4, 15, 83, 94, and 97 may be used as dedicated RBs for each UE. [Figure 11] Figure showing power allocation when applying various exemplary embodiments described herein. [Figure 12] Figure showing an example of the allocation of common and dedicated RBs for a physical shared feedback channel according to some exemplary embodiments. [Figure 13] Figure showing an example of a flowchart of a method that can be performed by a UE according to various exemplary embodiments. [Figure 14] Figure showing examples of various network devices according to some exemplary embodiments. [Figure 15] Figure showing an example of a 5G network and system architecture according to a particular exemplary embodiment.

DETAILED DESCRIPTION OF THE INVENTION

[0011] It will be readily understood that the components of a particular exemplary embodiment can be arranged and designed in a wide variety of different configurations as generally described herein and shown in the drawings. Thus, the following detailed description of some exemplary embodiments of a system, method, apparatus, and computer program product for determining transmit power for a common interleave and RB is not intended to limit the scope of a particular exemplary embodiment, but rather represents the selected exemplary embodiments.

[0012] The 3GPP extension to sidelink (SL) operation may include support for SL on unlicensed spectra for both Mode 1 and Mode 2, where Uu operation for Mode 1 may be limited to licensed spectra only. Channel access mechanisms from NR-U may be reused for unlicensed SL (SL-U) operation, which may allow assessment of the applicability of SL resource reservations to SL-U operation within the boundaries of the unlicensed channel access mechanism and operation.

[0013] The physical channel design framework may include modifications to the NR SL physical channel structure and procedures to operate on the unlicensed spectrum, for example, existing NR SL and NR-U channel structures may be reused as a baseline.

[0014] In the sub-7 GHz unlicensed band, coexistence of NR with other systems (e.g., IEEE 802.11) may be possible using a listen-before-talk (LBT) channel access mechanism, and a UE intended to perform SL transmission may first need to successfully complete an LBT check before initiating transmission. For a UE to pass the LBT check, it may first need to observe available channels for several consecutive clear channel assessment (CCA) slots, the duration of which is 9 microseconds in the sub-7 GHz band. A UE may consider a channel available for a CCA slot if the measured power (i.e., energy collected during the CCA slots) is below a regulation-specific threshold, which may depend on the operating band and geographical area. When a UE initiates communication (i.e., acts as the initiating device), the UE may acquire the "right" to access the channel for a certain period (i.e., channel occupancy time (COT)) by applying an "extended" LBT procedure, provided that the channel is considered to be free for the entire duration of the contention window (CW). This "extended" LBT procedure may be called LBT type 1, as shown in Figure 1.

[0015] The durations for both COT and CW may depend on the Channel Access Priority Class (CAPC) associated with the UE traffic, as shown in Table 1 below. Control plane traffic (e.g., physical sidelink control channel (PSCCH)) may be transmitted with p=1, while user plane traffic may have p>1. Table 1 provides details for LBT type 1 for Uu uplinks (UL). However, the parameters for LBT type 1 for downlinks (DL) may also be adopted for SL.

[0016] [Table 1] Table 1: CAPC for UL

[0017] Upon successful completion of LBT Type 1 and execution of a transmit, the UE initiating the transmit (as the initiating device) may acquire a COT with a duration associated with the corresponding CAPC. The acquired COT may remain valid even when the initiating device pauses its transmit. However, if the initiating device wishes to perform a new transmit (e.g., within a COT), the initiating device may still need to perform a “reduced” LBT procedure (e.g., “LBT Type 2”). For example, as shown in Figures 2C and 2F, LBT Type 2A (i.e., a 25 μs LBT) may be used for an SL transmit within a COT acquired by the initiating device when the gap between two SL transmits is 25 μs or more, and for an SL transmit following another SL transmit. In another example, Figures 2B and 2E show LBT Type 2B (i.e., a 16 μs LBT), which may be used for an SL transmit within a COT acquired by the initiating device, or only for an SL transmit following another SL with a gap exactly equal to 16 μs. In a further example, LBT type 2C (i.e., no LBT) (shown in Figures 2A and 2D) may be used only for SL transmissions following another SL, where the gap is less than 16 μs and the permitted SL transmission duration is 584 μs or less.

[0018] The initiating device may share its acquired COT with its intended receiver (i.e., the responding device). As shown in Figure 3, the initiating device may notify the responding device of the duration of this COT (e.g., by control signaling). The responding device can then use this information to determine which type of LBT to apply when the intended receiving device performs a transmit for which the initiating device is. If the responding device transmit is outside of COT, the responding device may acquire a new COT using LBT type 1 with the appropriate CAPC.

[0019] In 3GPP Release 16, NR SL can facilitate communication between UEs and other nearby UEs via direct communication / SL communication. Two resource allocation modes (i.e., NR SL mode 1 and NR SL mode 2) may be used, and an SL transmitter (TX) UE may be configured to perform NR SL transmission using one of these modes. In NR SL mode 1, SL transmission resources may be allocated (scheduled) to the SL TX UE by the network, as shown in Figure 4A. In contrast, an SL TX UE in NR SL mode 2 may autonomously select its SL transmission resources, as shown in Figure 4B. In NR SL mode 1, where the base station is responsible for SL resource allocation, the configuration and operation may be similar to that via the Uu interface.

[0020] In NR SL mode 2, the SL UE may autonomously perform resource selection using sensing procedures. Specifically, an SL TX UE in NR SL mode 2 may first perform sensing procedures on the configured SL transmit resource pool to determine the reserved resources of other nearby SL TX UEs. Based on the data obtained from sensing, the SL TX UE may select a resource accordingly from the available SL resources. In order for the SL UE to perform sensing and to obtain the necessary information to receive SL transmits, the SL UE may need to decode SL control information (SCI).

[0021] An SCI associated with data transmission may include a first-stage SCI and a second-stage SCI. Generally, an SCI may support size differences between SCIs for various NR-vehicle-to-anything (V2X) SL service types (e.g., broadcast, groupcast, and unicast) according to a two-stage SCI structure. The first-stage SCI (i.e., SCI format 1-A) may be carried by a PSCCH and may contain information to enable sensing operations and / or information necessary to determine resource allocation on the physical sidelink shared channel (PSSCH) and to decode the second-stage SCI. The second-stage SCI (i.e., SCI formats 2-A and 2-B) may be carried by a PSCCH (e.g., multiplexed on an SL shared channel (SCH)) and may contain source and destination identities, information to identify and decode the associated SL-SCH transport block (TB), control of hybrid automatic retransmission request (HARQ) feedback for unicast / groupcast, and / or triggers for channel status information (CSI) feedback for unicast.

[0022] The configuration of resources in the SL resource pool may define the minimum information necessary for the RX UE to decode the transmission. This may include the number of subchannels, the number of physical resource blocks (PRBs) per subchannel, and the number of symbols in the PSCCH, and the slot may have a physical sidelink feedback channel (PSFCH) and / or other configuration modes. However, the data for the actual SL transmission (i.e., payload) may be provided in the PSCCH (i.e., first stage SCI) for each individual transmission, which may include time and frequency resources, demodulation reference signal (DMRS) configuration for the PSCCH, modulation and coding scheme (MCS), PSFCH, and / or others. Figure 5 shows an example of an SL slot structure, shown as a slot with a PSCCH / PSSCH and a slot with a PSCCH / PSSCH where the last symbol is used for the PSFCH.

[0023] The configuration of the PSCCH (e.g., DMRS, MCS, number of symbols used) may be part of the resource pool configuration. Furthermore, indication of which slots have PSCCH symbols may also be part of the resource pool configuration. However, the configuration of the PSCCH (e.g., number of symbols used, DMRS pattern, and MCS) may also be provided by the first-stage SCI, which may be the payload transmitted within the PSCCH, and may follow the configuration shown in Table 2 below.

[0024] [Table 2] Table 2: Based on the number of symbols used and the duration of PSCCH PSSCH DMRS Configuration

[0025] 3GPP Release 16 introduced PSFCH to enable HARQ feedback via SL from the intended receiver UE (i.e., RX UE) of a PSSCH transmit to the transmitting UE (i.e., TX UE). Within PSFCH, a Zadoff-Chu sequence within one PRB may be repeated across two orthogonal frequency division multiplexing (OFDM) symbols, the first of which may be used for automatic gain control (AGC) near the end of the SL resources in the slot. Exemplary slot formats for PSCCH, PSSCH, and PSFCH are shown in Figure 7, and the Zadoff-Chu sequence may be pre-configured for each SL resource pool when used as the base sequence.

[0026] The time resources for PSFCH may be preconfigured to occur once every 0, 1, 2, or 4 slots. The HARQ feedback resource (i.e., PSFCH) may be derived from the resource locations of PSCCH / PSSCH. A configuration parameter K, having units of slots, may be used for the timing from PSSCH to HARQ. The time opportunity for PSFCH may be determined from K. In the case of a PSSCH transmission using the last symbol of slot n, the HARQ feedback may also be in slot n+a, where a can be the smallest integer greater than or equal to K, provided that slot n+a contains the PSFCH resource. At least K slot time gaps may allow the RX UE to account for processing delays when decoding the PSCCH and generating the HARQ feedback. K can be equal to 2 or 3, and a single value of K may be preconfigured per resource pool. This may allow several RX UEs using the same resource pool to utilize the same mapping of PSFCH resources for HARQ feedback. The N PSSCH slots associated with the slots containing PSFCH may be determined using parameter K.

[0027] As shown in the example in Figure 7, the duration of the PSFCH resource may be configured as N=4 (i.e., 4 PSSCH slots associated with the PSFCH), and K (e.g., sl-MinTimeGapPSFCH) may be configured as 2. For L subchannels in the resource pool and N PSSCHs associated with the slots containing the PSFCH, there may be N*L subchannels associated with the PSFCH symbol. If M PRBs are available for the PSFCH within the PSFCH symbol, there may be M PRBs available for HARQ feedback of transmissions through N*L subchannels.

[0028] If M is constructed such that it is a multiple of N*L, then M set =M / (N*L) distinct sets of PRBs can be associated with HARQ feedback for each subchannel during the PSFCH period. set A first set of PRBs can be associated with the HARQ feedback of the transmission in the first subchannel of the first slot. set A second set of PRBs may be associated with the HARQ feedback for transmission in the first subchannel of the second slot, and so on. This is shown in Figure 8 when N=4, L=3, and all PRBs in the PSFCH symbol are available to the PSFCH. The HARQ feedback for transmission in PSSCHx is M in the corresponding PSFCH symbol for x=1, ..., 12. set It can be transmitted over a set x of PRBs.

[0029] M associated with subchannels setA set of PRBs can be shared among multiple RX UEs in the case of acknowledgement (ACK) / negative acknowledgement (NACK) feedback for groupcast communication (Option 2), or for different PSSCH transmissions in the same subchannel. For each PRB available for PSFCH, there may be Q cyclic shift pairs available to support the ACK or NACK feedback of Q RX UEs within the PRB. For a resource pool, the number Q of cyclic shift pairs may be preconfigured and may be equal to 1, 2, 3, or 6.

[0030] The number F of available PSFCH resources can be calculated in relation to the cyclic shift (CS) of a sequence (e.g., Zadoff-Chu sequence) to support the HARQ feedback of a given transmission (e.g.,

[0031]

Number

[0032] The F PSFCH resources available for multiplexing the HARQ feedback for PSSCH can be determined based on two options. First, based on the L PSSCH subchannels used by PSSCH, F can be calculated as F = L PSSCH * M set * Q PSFCHs (associated with the L PSSCH subchannels of PSSCH), using the L PSSCH subchannels of PSSCH, M set for each PRB associated with the PSFCH of each subchannel, and Q cyclic shift pairs available in each PRB. Second, the F PSFCH resources are M set for each PRB associated with the PSFCH of each subchannel and Q cyclic shift pairs available in each PRB, and F = M set*Q PSFCHs (associated with the starting subchannel of a PSSCH) can be determined based only on the starting subchannel used by the PSSCH (i.e., based on only one subchannel if L PSSCHs > 1). Similar to PUCCH in NR Uu of 3GPP Release 15, the F available PSFCH resources can be indexed based on the PRB index (i.e., frequency domain) and the cyclic shift pair index (i.e., sign domain).

[0033] The mapping of a PSFCH index i (i=1, 2, ..., F) to PRBs and Q cyclic shift pairs can begin with the PSFCH index i increasing along with the PRB index until it reaches the number of PRBs available to the PSFCH. The PSFCH index i can then increase along with the cyclic shift pair index, and again along with the PRB index, and so on. Among the F PSFCHs available for HARQ feedback of a given transmission, RX UE has i=(T ID +R ID A PSFCH having index i given by ) mod F can be selected, where T ID This is the Layer 1 ID of the TX UE (indicated in the second stage SCI). For unicast ACK / NACK feedback and groupcast NACK only feedback (i.e., Option 1), R ID = 0

[0034] In the case of group cast ACK / NACK feedback (i.e., option 2), R IDThis may be equal to the RX UE identifier within the group, which may be indicated by a higher layer. For a number X of RX UEs in a group, the RX UE identifier may be an integer between 0 and X-1. An RX UE may determine which PRB and cyclic shift pair should be used to send its HARQ feedback based on the PSFCH index i. An RX UE may use the first or second cyclic shift from the cyclic shift pair associated with the selected PSFCH index i to send a NACK or ACK, respectively. By an RX UE selecting a PSFCH with index i, a TX UE can distinguish between HARQ feedback from a different RX UE (e.g., via the RX UE identifier in the case of group cast option 2) and HARQ feedback intended for the TX UE (e.g., via the Layer 1 ID of the TX UE in the case of unicast). ID Since = 0, RX UE is Layer 1 ID TX UE identifier T ID Based solely on that, the same PSFCH index i can be selected for those NACK-only feedbacks.

[0035] PSFCH may be transmitted in response to the reception of a PSCCH / PSSCH transmission (for example, when the receiver is the intended receiver), and therefore may be the associated PSFCH power control procedure. The UE may perform multiple PSFCH transmissions in the same slot, and each PSFCH transmission may be a narrowband transmission.

[0036] Regarding the PSFCH power control procedure, as described below, when the UE operates under network coverage and dl-P0-PSFCH is provided, power control may be directed to the serving cell and may be based on the number of PSFCH transmissions in the same slot rather than the required power directed to the intended receiver. When the UE operates outside network coverage or dl-P0-PSFCH is not provided (e.g., when the SL resource pool is operated on resources not shared with the Uu's UL), power control may depend only on the number of PSFCH transmissions in the same slot and may not be limited by path loss to the gNB and associated interference to UL reception at the gNB. Therefore, when the UE only needs to perform one PSFCH transmission and dl-P0-PSFCH is not provided (i.e., there is no need to perform power control to the serving cell), the UE may P cmax The maximum transmit power provided by can be applied.

[0037] Noise reduction (NR) in the unlicensed spectrum is limited to below the 7 GHz band. Within this frequency range, specific spectral requirements may exist, for example, for the design of the UL physical channel, where the occupied channel bandwidth (OCB) is between 80% and 100% of the declared nominal channel bandwidth. The OCB may also be the bandwidth containing 99% of the signal power. During COT, the instrument may temporarily operate with an OCB of less than 80% of the nominal channel bandwidth, having a minimum of 2 MHz. Requirements regarding maximum power spectral density (PSD) may have a resolution bandwidth of 1 MHz and may require a maximum PSD of 10 dBm / MHz for 5150–5350 MHz. A 10 kHz resolution may be required to test the 1 MHz PSD constraint, and therefore the maximum PSD constraint may be met with any occupied 1 MHz bandwidth. In addition, band-specific total maximum transmit power may be required, such as an effective isotropically radiated power (EIRP) limit of 23 dBm for 5150–5350 MHz.

[0038] The limitations on OCB and PSD may affect the design choices for UL channels in unlicensed NR systems, such as the interlaced frequency division multiplexing (FDM) scheme shown in Figure 8. In this interlaced FDM (e.g., UL resource allocation type 2), UL resources may be allocated to interlacing 10 equidistant PRBs. The number of interlaces may be 10 for a 15 kHz subcarrier spacing (SCS) or 5 for a 30 kHz SCS.

[0039] HARQ feedback may be transmitted via PSFCH in response to the reception of a PSCCH / PSSCH transmission, provided the receiver is the intended receiver. The required transmit power can be calculated according to the PSFCH power control procedure as described above. However, like all transmissions on the n46 (i.e., 5200MHz), n96 (i.e., 6000MHz), and n102 (i.e., 6200MHz) bands, PSFCH transmissions may also be subject to the OCB and PSD provisions as described above.

[0040] Various options can affect PSFCH transmission using 15kHz and 30kHz SCS. For example, the first option requires each PSFCH transmission to occupy one common interlace and K3 dedicated PRBs, which can address the problems that arise in PSFCH when applying interlaced FDM in SL-U to satisfy OCB and PSD requirements. This technique may use a common interface with arbitrary information to satisfy OCB requirements (e.g., the PSFCH secondary interface shown in Figure 10) and transmit HARQ feedback in a dedicated RB (e.g., "PSFCH primary" in Figure 10). Another technique requires each PSFCH transmission to occupy one interlace and may apply PRB-level cyclic shifts. The UE may transmit dedicated cyclic shifts in K1 dedicated PRBs within this interlace, or common cyclic shifts in other PRBs within this interlace. Another option requires each PSFCH transmission to occupy one dedicated interlace and / or may employ PRB-level cyclic shift hopping as in NR-U. In addition, some options may require each PSFCH transmit to occupy K4 dedicated PRBs and K2 common PRBs, where the K2 common PRBs are located on two edges of the RB set. This technique may be similar to the previously described technique, but instead of transmitting the interlaced common RBs, the common RBs may be transmitted only on each edge of the channel (i.e., the RB set). For example, as shown in Figure 10, only the top and bottom red RBs are transmitted. However, these options do not address the effects of PSD limitations (e.g., whether / how they operate when common PRBs and dedicated PRBs are within the same 1 MHz bandwidth, e.g., whether to remove the common PRBs or reduce the power of the common PRBs in such cases).

[0041] The fact that each UE uses a common interlace or common RB and one or more dedicated RBs for PSFCH transmission means that a common interlace / RB may be used by multiple UEs. As a result, the power of such a common interlace may increase linearly with the number of UEs that need to transmit HARQ feedback, while the power of the dedicated RBs may be lower. This can result in additional unnecessary interference that may interfere with the operation of other devices on the same spectrum, and may also unnecessarily increase power consumption. Therefore, it is preferable to avoid using more TX power than required for the common interlace / RB. Figure 10 shows an example of a 20 MHz bandwidth with a 15 kHz SCS, where interlace 1 (i.e., RB1, 11, 21, ..., 91) may be used as a common interlace by five UEs, and RB4, 15, 83, 94, and 97 may be used as dedicated RBs per UE. As shown in Figure 10, if each UE transmits its dedicated RB and common RB with the same power, the total power transmitted on the common RB may be five times greater than the power for the dedicated RBs. This can cause interference to other nearby UEs and / or, due to a large power imbalance between the dedicated RB and the common RB, can affect the decoding of information transmitted on the dedicated RB.

[0042] Certain exemplary embodiments described herein may have various advantages and / or benefits for overcoming the aforementioned drawbacks. For example, certain exemplary embodiments may minimize power consumption and interference caused by the UE while satisfying the requirements for OCB and PSD. Thus, certain exemplary embodiments described later aim to improve computer-related technologies.

[0043] As described below, several exemplary embodiments relate to improved power control that enables the UE to comply with OCB and PSD requirements for PSFCH transmissions while keeping interference caused by transmissions over common interlace or RB as low as possible. In this way, interference to other devices and networks operating in the vicinity can be minimized.

[0044] For example, in various exemplary embodiments, the UE may determine the TX power (i.e., TxP_ded) applied to a dedicated PSFCH RB according to an SL power control procedure. If the UE transmits multiple PSFCHs simultaneously, the TxP_ded for each transmission may be the same as 3GPP R16 / R17, and / or the TxP_ded for some PSFCHs may be reduced to meet the PSD limit in the unlicensed spectrum.

[0045] Next, the UE may determine the number of non-adjacent common PSFCH RBs (i.e., N_RB_com). Common PSFCH RBs may form interlaced or partially interlaced signals and / or be located on the upper and / or lower edges of the RB set. Transmission of common PSFCH RBs located near dedicated PSFCH RBs (e.g., within 1 MHz) may be omitted.

[0046] The UE may then select the TX power TxP_com for the common PSFCH RB, so that at least 99% of the total PSFCH energy (i.e., dedicated + common PSFCH RB) can be allocated to the RB over at least 80% of the nominal channel bandwidth. For a 20MHz channel, the OCB (e.g., bandwidth from the lowest allocated RB to the highest allocated RB) may be at least 16MHz. If the dedicated PSFCH RB allocation already satisfies the OCB requirement, TxP_com may be set to zero (i.e., no common PSFCH RB is transmitted). Figure 11 shows the power allocation for a specific exemplary embodiment using common PSFCH interlaced / RB. Specifically, TxP_tot is the total PSFCH transmit power, TxP_ded is the power for the dedicated PSFCH RB, TxP_com_RB is the power for each common PSFCH RB, TxP_com is the total power for the common PSFCH RB, and N_RB_com is the number of common PSFCH RBs.

[0047] TxP_com can be calculated in several different ways. For example, each PSFCH transmit may occupy K4 dedicated PRBs and K2 common PRBs, the K2 common PRBs may be located on two edges of the RB set, with K4=1 and K2=2 (one RB on each edge of the RB set). For a nominal channel bandwidth of 20 MHz, the occupied channel bandwidth may be at least 16 MHz (i.e., 89 RB for an SCS of ceil(16 MHz / 0.18 MHz) = 15 kHz) and 45 RB for an SCS of ceil(16 MHz / 0.36 MHz) = 30 kHz.

[0048] After a dedicated RB transmits at power level TxP_ded, at least 99% of the signal must have a bandwidth of 16 MHz to satisfy the OCB requirements. Therefore, the power (TxP_com) of each common RB located at least 16 RBs apart should be greater than 1% of the total TX power (i.e., TxP_com > TxP_ded / 0.98 - TxP_ded). Similarly, if all common RBs use common interlacing of 10 RBs with the same TX power, the TX power of the common RBs can be calculated as xP_com > TxP_ded / 0.90 - TxP_ded. Correspondingly, the total Tx power can be calculated as TxP_tot = TxP_ded + TxP_com = TxP_ded / (1 - 0.01 * N_RB_com). Additionally, a safety margin (e.g., a multiplier) may be added to the TxP_com formula to accommodate measurement and RF inaccuracies, for example. The safety margin may be a fixed number, such as 3 dB.

[0049] Figure 12 shows an example where each PSFCH transmit occupies one common interlace and K3 dedicated PRBs, with K3 = 2 dedicated RBs and 10 equidistant common RBs interlaced. However, common RB #10 overlaps with the dedicated RBs, leaving a total of 9 common RBs that are not transmitted. Therefore, in this scenario, the TX power of the common RBs can be calculated as TxP_com > TxP_ded / (1 - 0.01 * 9) - TxP_ded = TxP_ded / 0.91 - TxP_ded. As a result, if the dedicated RBs are transmitted at the maximum power allowed by the PSD rule (e.g., 10 dBm (i.e., 10 mW)), the power of the dedicated RBs must satisfy TxP_com > 10 mW / 0.91 - 10 mW = 0.989 mW ~ 0 dBm, without assuming any further safety margins.

[0050] In various exemplary embodiments, power reductions applied to commonly interlaced PSFCHs may be used to increase the PSFCH power of dedicated RBs. Specifically, the PSFCH power may be evenly divided among all PSFCHs transmitted within the same slot. The commonly interlaced PSFCH power may then be reduced as described in one of the options described above. The power of the dedicated RB's PSFCH may then be increased so that the total TX PSFCH power is the same as in the first step.

[0051] Figure 13 shows an example of a flowchart of a method that can be performed by a UE such as the UE1420 shown in Figure 14, according to various exemplary embodiments.

[0052] In 1301, the method may include determining a PSFCH allocation for at least one PSFCH-dedicated RB.

[0053] In 1302, the method may further include calculating the corresponding TX power for the PSFCH allocation for at least one dedicated PSFCH RB. For example, the power may be calculated after the SL power control procedure.

[0054] In 1303, the method may further include determining at least one of a number or allocation of multiple common PSFCH RBs. For example, determining the allocation of common PSFCH RBs may include omitting the transmission of common RBs that are located below a threshold relative to dedicated PSFCH RBs. Such a threshold may be defined, for example, as 1 MHz and / or with respect to the number of RBs. Furthermore, determining the allocation of common PSFCH RBs may also include verifying whether the allocation of PSFCH RBs already satisfies the OCB requirements, and as a result, common RBs may not be transmitted.

[0055] In 1304, the method may further include calculating the TX power for multiple common RBs based on the corresponding TX power calculated in 1302 and the determined number or allocation of multiple common PSFCH RBs determined in 1303. For example, the TX power may be calculated according to TxP_com > TxP_ded / (1 - 0.01 * N_RB_com) - TxP_ded + safety margin.

[0056] In 1305, the method is that the calculated total transmit power (TxP_com + TxP_ded) is equal to the UE's maximum TX power P cmax This may further include determining whether it exceeds TxP_com+TxP_ded>P cmax However, TxP_ded <P cmax If so, the method may include omitting the transmission of common RBs that are not the outermost (i.e., closest to the edge of the channel / RB set). Otherwise, if it is not possible to omit the transmission of common RBs that are not the outermost, or if the total TX power is P cmax If it is not enough to reduce it to less than P, the method is that the total power is P cmax This may include reducing both TxP_com and TxP_ded by an equal amount until they fall below the following limits.

[0057] Figure 14 shows an example of a system according to a particular exemplary embodiment. In one exemplary embodiment, the system may include multiple devices, such as NE1410 and / or UE1420.

[0058] The NE1410 may be one or more of the following: a base station (e.g., a 3G UMITS node B, a 4G LTE evolved node B, or a 5G NR next-generation node B), a serving gateway, a server, and / or any other access node, or a combination thereof.

[0059] The NE1410 may further include at least one gNB centralized unit (CU), which may be associated with at least one gNB distributed unit (DU). At least one gNB-CU and at least one gNB-DU may have at least one F1 interface and at least one X n - It can communicate via the C interface and / or at least one NG interface by the fifth generation core (5GC).

[0060] UE1420 may include one or more of the following: mobile devices such as mobile phones, smartphones, personal digital assistants (PDAs), tablets, or portable media players; navigation units such as digital cameras, pocket video cameras, video game consoles, or Global Positioning System (GPS) devices; desktop or laptop computers; single-location devices such as sensors or smart meters; or any combination thereof. Furthermore, NE1410 and / or UE1420 may include one or more of the following: Citizens Broadband Wireless Service (CBSD) devices.

[0061] NE1410 and / or UE1420 may include at least one processor, indicated as 1411 and 1421, respectively. Processors 1411 and 1421 may be embodied by any computing or data processing device, such as a central processing unit (CPU), application-specific integrated circuit (ASIC), or equivalent device. The processor may be implemented as a single controller or as multiple controllers or processors.

[0062] At least one memory may be provided in one or more devices, as indicated in 1412 and 1422. The memory may be fixed or removable. The memory may contain computer program instructions or computer code. Memories 1412 and 1422 may independently be any suitable storage device, such as a non-temporary computer-readable medium. The term “non-temporary” as used herein may correspond to a limitation of the medium itself (i.e., tangible and not signaling), rather than a limitation on data storage persistence (e.g., random access memory (RAM) versus read-only memory (ROM)). A hard disk drive (HDD), random access memory (RAM), flash memory, or other suitable memory may be used. The memory may be coupled on a single integrated circuit as a processor, or it may be separated from one or more processors. Furthermore, computer program instructions stored in memory and processed by the processor may be any suitable form of computer program code, e.g., a compiled or interpreted computer program written in any suitable programming language.

[0063] Processors 1411 and 1421, memories 1412 and 1422, and any subset thereof may be configured to provide means corresponding to the various blocks in Figure 13. Although not shown, the device may also include positioning hardware such as GPS or micro-electromechanical system (MEMS) hardware, which may be used to determine the device's position. Other sensors are also permitted and may be configured to determine position, altitude, speed, orientation, etc., such as a barometer or compass.

[0064] As shown in Figure 14, transceivers 1413 and 1423 may be provided, and one or more devices may also include at least one antenna, indicated as 1414 and 1424, respectively. A device may have many antennas, such as an array of antennas configured for multiple-input multiple-output (MIMO) communication, or multiple antennas for multiple RATs. Other configurations of these devices may be provided, for example. Transceivers 1413 and 1423 may be units or devices that can be configured for a transmitter, a receiver, both a transmitter and a receiver, or both transmitting and receiving.

[0065] Memory and computer program instructions may be configured to cause a hardware device, such as a UE, to execute one of the processes described above (i.e., Figure 13) using a processor for a particular device. Thus, in certain exemplary embodiments, a non-temporary computer-readable medium may be encoded with computer instructions that, when executed in hardware, execute a process such as one of the processes described herein. Alternatively, certain exemplary embodiments may be executed entirely in hardware.

[0066] In certain exemplary embodiments, the apparatus may include a circuit configured to perform any of the processes or functions shown in Figure 13. As used in this application, the term “circuit” may mean one or more or all of the following: (a) an embodiment of a circuit consisting only of hardware (such as an embodiment consisting only of analog and / or digital circuits); (b) a combination of hardware circuitry and software (where applicable), for example, (i) a combination of analog and / or digital hardware circuitry and software / firmware; and (ii) any part of a hardware processor having software (including a digital signal processor), software, and memory working together to cause a device such as a mobile phone or server to perform various functions; and (c) a processor such as a microprocessor or part of a microprocessor that requires hardware circuitry and / or software (e.g., firmware) for operation, but the software may not be present when it is not required for operation. This definition of circuitry applies to all uses of this term in this application, including in any claim. As further examples, the term “circuit” as used herein may also include a mere hardware circuit or processor (or multiple processors), or a part of a hardware circuit or processor, and its accompanying software and / or firmware implementation. The term "circuit" also includes, for example, a baseband integrated circuit or processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or network device, as applicable to the elements of a particular claim.

[0067] Figure 15 shows an example of a 5G network and system architecture according to a specific exemplary embodiment. Several network functions are shown that may be implemented as software operating as part of a network device or dedicated hardware, as the network device itself or as dedicated hardware, or as virtual functions operating as a network device or dedicated hardware. The NE and UE shown in Figure 15 may be similar to NE1410 and UE1420, respectively. User plane functions (UPF) may provide services such as intra-RAT and inter-RAT mobility, data packet routing and forwarding, packet inspection, user plane quality of service (QoS) processing, DL packet buffering, and / or triggering DL data notifications. Application functions (AF) may interface with the core network primarily to facilitate application use of traffic routing and to interact with policy frameworks.

[0068] According to certain exemplary embodiments, processors 1411 and 1421 and memories 1412 and 1422 may be included in or form part of a processing circuit or control circuit. In addition, in some exemplary embodiments, transceivers 1413 and 1423 may be included in or form part of a transceiver circuit.

[0069] In some exemplary embodiments, the apparatus (e.g., NE1410 and / or UE1420) may include means for performing any of the methods, processes, or variations described herein. Examples of means may include one or more processors, memory, controllers, transmitters, receivers, and / or computer program code that cause the performance of the operation.

[0070] In various exemplary embodiments, the device 1420 may be controlled by memory 1422 and processor 1421 to determine a physical sidelink feedback channel assignment for at least one dedicated PSFCH RB; calculate the corresponding Tx power for the PSFCH assignment for at least one dedicated PSFCH RB; determine at least one of the number or assignments of a plurality of common PSFCH RBs; and calculate the Tx power for the plurality of common PSFCH RBs based on the corresponding Tx power and the determined number or assignment of the plurality of common PSFCH RBs.

[0071] Certain exemplary embodiments may be aimed at an apparatus that includes means for performing any of the methods described herein, which include, for example, means for determining a physical side-link feedback channel assignment for at least one dedicated PSFCH RB; means for calculating the corresponding Tx power for a PSFCH assignment for at least one dedicated PSFCH RB; means for determining at least one of a number or assignment of a plurality of common PSFCH RBs; and means for calculating the Tx power for the plurality of common PSFCH RBs based on the corresponding Tx power and the determined number or assignment of the plurality of common PSFCH RBs.

[0072] The features, structures, or characteristics of the exemplary embodiments described throughout this specification may be combined in any suitable way in one or more exemplary embodiments. For example, the use of phrases such as “various embodiments,” “specific embodiments,” “several embodiments,” or other similar wording throughout this specification refers to the fact that certain features, structures, or characteristics described in relation to exemplary embodiments may be included in at least one exemplary embodiment. Thus, the appearance of phrases such as “various embodiments,” “specific embodiments,” “several embodiments,” or other similar wording throughout this specification does not necessarily refer to the same group of exemplary embodiments, and the described features, structures, or characteristics may be combined in any suitable way in one or more exemplary embodiments.

[0073] As used herein, “at least one of the <list of two or more elements>” and “at least one of the <list of two or more elements>” and similar phrases mean at least one of the elements, at least two or more of the elements, or at least all of the elements, when the lists of two or more elements are linked by “and” or “or.”

[0074] In addition, the different functions or procedures described above may be performed in different orders and / or simultaneously with each other, as necessary. Furthermore, one or more of the described functions or procedures may be optional or combined, as necessary. Therefore, the above description should be considered as an example of the principles and teachings of a particular exemplary embodiment, and not as an extension thereof.

[0075] Those skilled in the art will readily understand that the exemplary embodiments described above may be practiced in a different order of steps and / or with hardware elements of a different configuration than those disclosed. Therefore, while several embodiments are described based on these exemplary embodiments, it will be apparent to those skilled in the art that certain modifications, variations, and alternative configurations are evident, while remaining within the spirit and scope of the exemplary embodiments.

[0076] Partial glossary 3GPP Third Generation Partnership Project 5G (5th generation) 5GC (5th Generation Core) 6G (6th Generation) ACK (Acknowledgment) AF Application Function AGC (Automatic Gain Control) AMF access and mobility management functions ASIC (Application-Specific Integrated Circuit) BS base station CAPC Channel Access Priority Class CBSD (Citizen Broadband Wireless Service Device) CCA Clear Channel Assessment CE control element CN Core Network COT Channel Occupancy Time CPU (Central Processing Unit) CS Patrol Shift CSI Channel Status Information CU Centralized Unit CW Contention Window DL Downlink DMRS demodulation reference signal DU Distributed Unit EIRP (Effective Isotropic Radiated Power) eMBB (Enhanced Mobile Broadband) eNB Advanced Node B FDM frequency division multiplexing gNB Next Generation Node B GPS (Global Positioning System) HARQ Hybrid Automated Resend Request HDD (Hard Disk Drive) IEEE (Institute of Electrical and Electronics Engineers) IoT (Internet of Things) L1 Layer 1 L2 Layer 2 LBT Listen Before Talk LTE Long-Term Evolution LTE-A Long-Term Evolution Advanced MCS Modulation and Encoding Scheme MEMS (Micro-Electromechanical Systems) MIMO multiple input multiple output mMTC Large-Scale Machine-Type Communication NACK Negative Response NE Network Entity NG Next generation NG-eNB Next-Generation Evolved Node B NG-RAN Next Generation Wireless Access Network NR new radio NR-U Unlicensed New Radio OCB Occupied Channel Bandwidth OFDM (Orthogonal Frequency Division Multiplexing) PDA (Personal Digital Assistant) PRB (Physical Resource Block) PSCCH Physical Sidelink Control Channel PSD Power Spectral Density PSFCH (Physical Sidelink Feedback Channel) PSSCH Physical Sidelink Shared Channel PUCCH Physical Uplink Control Channel QoS (Quality of Service) RAM (Random Access Memory) RAN (Radio Access Network) RAT (Radio Access Technology) RB resource block RE Resource Element RF radio frequency ROM (Read-only memory) RS reference signal Rx receiver SCH Sidelink Shared Channel SCI Sidelink Control Information SCS subcarrier spacing SL Sidelink SL-U Unlicensed Sidelink SMF session management function TB transport block Tx transmitter UE User Equipment UL Uplink UMTS Universal Mobile Communications System UPF User Plane Functionality URLLC (Ultra-High Reliability, Low Latency Communication) UTRAN (Universal Mobile Communication System Terrestrial Radio Access Network) V2X Car vs. Everything WLAN (Wireless Local Area Network)

Claims

1. It is a device, At least one processor, At least one memory, which, when executed by the at least one processor, provides at least the device Determine the physical side-link feedback channel allocation for at least one dedicated physical side-link feedback channel resource block, Calculating the corresponding transmit power for the physical side-link feedback channel allocation for the at least one dedicated physical side-link feedback channel resource block, Determining at least one of the number or allocation of multiple common physical sidelink feedback channel resource blocks, Calculating the transmit power for the multiple common physical side-link feedback channel resource blocks based on the corresponding transmit power and the determined number or allocation of the multiple common physical side-link feedback channel resource blocks, At least one memory to store the instruction to perform the action, A device equipped with the following features.

2. The apparatus according to claim 1, wherein the corresponding transmit power is calculated according to at least one side-link power control procedure.

3. The at least one memory and the instructions are further executed by the at least one processor, and the device has at least one The apparatus according to claim 1 or 2, which causes the transmission of at least one physical sidelink feedback channel common resource block located closer than at least one threshold to the at least one dedicated physical sidelink feedback channel resource block to be omitted.

4. The apparatus according to claim 3, wherein the at least one threshold is associated with at least one of the frequencies or number of resource blocks.

5. The at least one memory and the instructions are further executed by the at least one processor, and the device has at least one The apparatus according to claim 3, which allows verification whether the physical side-link feedback channel assignment satisfies at least one occupied channel bandwidth requirement.

6. The apparatus according to claim 5, wherein the transmit power for the plurality of common physical sidelink feedback channel resource blocks is calculated such that the transmit power for each of the common physical sidelink feedback channel resource blocks is at least 1 percent of the total transmit power for the common physical sidelink feedback channel resource block and the dedicated physical sidelink feedback channel resource block.

7. The at least one memory and the instructions are further executed by the at least one processor, and the device has at least one Determining whether the calculated total transmit power exceeds the maximum transmit power of the device, the at least one memory and the instruction, when executed by the at least one processor, the device shall have at least If it is determined that the calculated total transmit power exceeds the maximum transmit power of the device, then the transmission of the non-outermost common physical sidelink feedback channel resource block is first omitted, or If it is determined that the calculated total transmission power does not exceed the maximum transmission power of the device, or that the total transmission power is less than the threshold, then the total transmission power and the total dedicated transmission power of the device are reduced by the same amount until the total transmission power is less than or equal to the total dedicated transmission power. The apparatus according to any one of claims 1 to 6, which causes to perform or to make a decision.

8. Means for determining physical side-link feedback channel assignment for at least one dedicated physical side-link feedback channel resource block, means for calculating the corresponding transmit power of the physical side link feedback channel allocation for the at least one dedicated physical side link feedback channel resource block, Means for determining the number or at least one of the allocations of multiple common physical sidelink feedback channel resource blocks, means for calculating the transmit power for the plurality of common physical side link feedback channel resource blocks based on the corresponding transmit power and the determined number or allocation of the plurality of common physical side link feedback channel resource blocks, A device equipped with the following features.

9. The apparatus according to claim 8, wherein the corresponding transmit power is calculated according to at least one side-link power control procedure.

10. The apparatus according to claim 8 or 9, further comprising means for omitting the transmission of at least one physical sidelink feedback channel common resource block located closer than at least one threshold to the at least one dedicated physical sidelink feedback channel resource block.

11. The apparatus according to claim 10, wherein the at least one threshold is associated with at least one of the frequencies or number of resource blocks.

12. The apparatus according to claim 10, further comprising means for verifying whether the physical sidelink feedback channel assignment satisfies at least one occupied channel bandwidth requirement.

13. The apparatus according to claim 12, wherein the transmit power for the plurality of common physical sidelink feedback channel resource blocks is calculated such that the transmit power for each of the common physical sidelink feedback channel resource blocks is at least 1 percent of the total transmit power for the common physical sidelink feedback channel resource block and the dedicated physical sidelink feedback channel resource block.

14. Means for determining whether the calculated total transmission power exceeds the maximum transmission power of the device, If it is determined that the calculated total transmit power exceeds the maximum transmit power of the device, means to first omit the transmission of the common physical sidelink feedback channel resource block that is not the outermost, or If it is determined that the calculated total transmission power does not exceed the maximum transmission power of the device, or that the total transmission power is less than a threshold, means for reducing the total transmission power and the total dedicated transmission power of the device by the same amount until the total transmission power is less than or equal to the total dedicated transmission power, The apparatus according to any one of claims 8 to 13, further comprising means for determining, further including.

15. Determine the physical side-link feedback channel allocation for at least one dedicated physical side-link feedback channel resource block, Calculating the corresponding transmit power for the physical side-link feedback channel allocation for the at least one dedicated physical side-link feedback channel resource block, Determining at least one of the number or allocation of multiple common physical sidelink feedback channel resource blocks, Calculating the transmit power for the multiple common physical side-link feedback channel resource blocks based on the corresponding transmit power and the determined number or allocation of the multiple common physical side-link feedback channel resource blocks, Methods that include...

16. The method according to claim 15, wherein the corresponding transmit power is calculated according to at least one side-link power control procedure.

17. The method according to claim 15 or 16, further comprising omitting the transmission of at least one physical sidelink feedback channel common resource block located closer than at least one threshold to the at least one dedicated physical sidelink feedback channel resource block.

18. The method according to claim 17, wherein the at least one threshold is associated with at least one of the frequencies or number of resource blocks.

19. The method according to claim 17, further comprising verifying whether the physical sidelink feedback channel assignment satisfies at least one occupied channel bandwidth requirement.

20. The method according to claim 19, wherein the transmit power for the plurality of common physical sidelink feedback channel resource blocks is calculated such that the transmit power for each of the common physical sidelink feedback channel resource blocks is at least 1 percent of the total transmit power for the common physical sidelink feedback channel resource block and the dedicated physical sidelink feedback channel resource block.

21. The purpose is to determine whether the calculated total transmission power exceeds the maximum transmission power of the device, If it is determined that the calculated total transmit power exceeds the maximum transmit power of the device, then the transmission of the non-outermost common physical sidelink feedback channel resource block is first omitted, or If it is determined that the calculated total transmission power does not exceed the maximum transmission power of the device, or that the total transmission power is less than the threshold, then the total transmission power and the total dedicated transmission power of the device are reduced by the same amount until the total transmission power is less than or equal to the total dedicated transmission power. The method according to any one of claims 15 to 20, further comprising determining

22. A non-temporary computer-readable medium that, when executed by a device, includes program instructions causing the device to perform at least one of the methods described in any one of claims 15 to 21.

23. An apparatus comprising a circuit configured to perform the method described in any one of claims 15 to 21.

24. A computer program that, when executed by a device, includes instructions causing the device to perform the method described in any one of claims 15 to 21.

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