Sidelink synchronization signal block (S-SSB) communication in multiple resource block sets

Abstract

Certain aspects of the present disclosure provide techniques for wireless communication by an apparatus. A method includes receiving an indication of a reference number of times to transmit a sidelink synchronization signal block (S-SSB) in a sidelink bandwidth portion (SL-BWP); and transmitting the first S-SSB using a first transmission power in each of a plurality of resource block (RB) sets, wherein the first transmission power is based on a reference number of times of transmitting the S-SSB.

Description

[0001] INTRODUCTION TECHNICAL FIELD

[0002] Aspects of the disclosure relate to wireless communications, and more particularly, to techniques for communication of sidelink synchronization signal blocks.

[0003] Related Art

[0004] Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and other similar technologies.

[0005] Despite the tremendous technological advancements in wireless communications systems over the years, challenges remain. For example, complex and dynamic environments can still attenuate or block signals between a wireless transmitter and a wireless receiver. Thus, there is a continuing desire to improve the technical performance of wireless communications systems, including, for example: improving the speed and data carrying capacity of communications, improving the efficiency of use of shared communications media, reducing the power used by transmitters and receivers in performing communications, improving the reliability of wireless communications, avoiding redundant transmissions and / or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access a wireless communications system, increasing the ability of different types of devices to communicate with each other, increasing the number and types of wireless communications media that are available for use, and so forth. Thus, there is a need to further improve wireless communications systems to overcome the aforementioned technical challenges and others. SUMMARY

[0006] One aspect provides a method for wireless communications by an apparatus. The method includes receiving an indication of a reference number of transmissions of a sidelink synchronization signal block (S-SSB) in a sidelink bandwidth part (SL-BWP), and transmitting a first S-SSB in each of a plurality of resource block (RB) sets using a first transmit power, where the first transmit power is based on the reference number of transmissions of S-SSBs.

[0007] Another aspect provides a method for wireless communications by an apparatus. The method includes receiving, in an anchor RB set of a SL-BWP comprising a plurality of RB sets, a physical sidelink broadcast channel (PSBCH) comprising a demodulation reference signal (DMRS) carrying one or more bits identifying one or more RB sets of the plurality of RB sets as comprising a first S-SSB, and receiving the first S-SSB in each of the one or more RB sets.

[0008] Other aspects provide: one or more means capable of operating to, configured to, or otherwise adapted to perform any part of any method described herein (e.g., such that it can be implemented by only one means or in a distributed manner across multiple means); one or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors of the one or more means, cause the one or more means to perform any part of any method described herein (e.g., such that the instructions can be included in only one computer-readable medium or in a distributed manner across multiple computer-readable media, such that the instructions can be executed by only one processor or by multiple processors in a distributed manner). Each of the one or more means may include a processor or multiple processors, and / or enable execution to be performed by only one means or in a distributed manner across multiple means; one or more computer program products embodied on one or more computer-readable storage media, the computer-readable storage media including code for performing any part of any method described herein (e.g., enabling the code to be stored in only one computer-readable medium or in a distributed manner across computer-readable media); and / or one or more means, the one or more means including one or more components for performing any part of any method described herein (e.g., enabling execution to be performed by only one means or by multiple means in a distributed manner). By way of example, an means may include a processing system, a device having a processing system, or a processing system cooperating via one or more networks.

[0009] For illustrative purposes, the following description and figures illustrate certain features. Attached Figure Description

[0010] The accompanying drawings depict certain features of the various aspects described herein and should not be considered as limiting the scope of this disclosure.

[0011] FIG. 1 An example wireless communication network is depicted.

[0012] FIG. 2 An example decomposed base station architecture is described.

[0013] FIG. 3 Various aspects of the example base station and example user equipment (UE) are described.

[0014] FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D Various example aspects of data structures used in wireless communication networks are described.

[0015] FIG. 5An example is illustrated of conveying a sidelink synchronization signal block (S-SSB) in each of the multiple resource block (RB) sets in the sidelink bandwidth portion (SL-BWP).

[0016] FIG. 6 An example is shown of conveying S-SSB in each of the multiple RB sets in the SL-BWP.

[0017] FIG. 7 An example is shown of conveying S-SSB in each of the multiple RB sets in the SL-BWP.

[0018] FIG. 8 An example is shown of conveying S-SSB in each of the multiple RB sets in the SL-BWP.

[0019] FIG. 9 A method for wireless communication is described.

[0020] FIG. 10 Another method for wireless communication is described.

[0021] FIG. 11 Various aspects of the example communication device are described.

[0022] FIG. 12 Various aspects of the example communication device are described. Detailed Implementation

[0023] This disclosure provides apparatus, methods, processing systems, and computer-readable media for side-link synchronization signal block (S-SSB) communication.

[0024] Certain wireless communication devices (e.g., User Equipment (UE), Base Station (BS), other network entities, etc.) can communicate in unlicensed spectrum (also known as shared spectrum), such as on one or more unlicensed frequency bands (referred to as unlicensed bands or unlicensed channels). For example, unlicensed spectrum can be divided into one or more unlicensed frequency bands (also known as bandwidth portions (BWP)), such as each having a bandwidth of 20 MHz. In some cases, wireless communication devices can communicate with the participation of a base station (such as based on the 5G New Radio Unlicensed (NR-U) operating mode) or directly without the participation of a base station (such as based on the Sidelink-U (SL-U) operating mode on an unlicensed frequency band). Unlicensed spectrum refers to a portion of the electromagnetic spectrum that can be assigned or shared by devices for non-exclusive use, while licensed spectrum is a portion of the electromagnetic spectrum specifically assigned to mobile network operators.

[0025] In unlicensed spectrum, channel access is not guaranteed, which means that access to unlicensed frequency bands is not guaranteed. Therefore, in order to provide (e.g., sidelink) service on unlicensed spectrum, wireless communication devices are required to contend for channel access in that spectrum, for example, via idle channel assessment (CCA) and / or listen-before-tell (LBT) processes.

[0026] For example, before transmitting on one or more unlicensed frequency bands, a wireless communication device may perform a Level Bypass (LBT) on one or more unlicensed frequency bands to ensure that one or more unlicensed frequency bands are idle (not used by another wireless communication device). Therefore, each unlicensed frequency band can also be referred to as an LBT band. The LBT process helps avoid interference between devices. LBT can be based on energy detection (ED) or signal detection. For energy detection-based LBT, when the signal energy measured from the channel (e.g., an unlicensed frequency band) is below a threshold, the LBT result is pass (meaning the unlicensed frequency band is idle). Conversely, when the signal energy measured from the channel exceeds the threshold, the LBT result is fail (meaning the unlicensed frequency band is occupied). For signal detection-based LBT, when no channel reservation signal (e.g., a predetermined preamble) is detected in the channel, the LBT result is pass.

[0027] When the LBT result for an unlicensed frequency band is passed, the wireless communication device is able to transmit on the unlicensed frequency band. Specifically, when the LBT result is passed, the wireless communication device acquires the Channel Occupancy Time (COT) in the unlicensed frequency band. COT is the duration during which the wireless communication device can transmit in the unlicensed frequency band. Specifically, COT indicates the amount of time the device can occupy the channel (unlicensed frequency band) for a given transmission burst, such as the maximum amount of time. For example, depending on the region, COT could be 4 ms or 10 ms.

[0028] In some respects, in order to reserve a COT in an unlicensed frequency band, at least one wireless communication device transmits at least one signal in at least a portion of the unlicensed frequency band. For example, the frequency range of the unlicensed frequency band may be divided into multiple subcarriers, each subcarrier corresponding to a portion of the entire frequency range of the unlicensed frequency band. Therefore, in order to reserve a COT, at least one wireless communication device transmits at least one signal in one or more subcarriers of the unlicensed frequency band (such as in one or more resource blocks (RBs), where an RB comprises multiple frequency-contiguous subcarriers. Frequency-contiguous subcarriers mean that there are no other subcarriers between the subcarriers of the RB in terms of frequency.

[0029] In some respects, for sidelink communication, such as for wireless communication devices operating in SL-U operating mode, the unlicensed frequency band in which the wireless communication device communicates is referred to as the sidelink BWP (SL-BWP). An SL-BWP may include multiple sets of RBs, where each set of RBs comprises multiple frequency-contiguous RBs. Frequency-contiguous RBs mean that there are no other RBs between the RBs in the RB set at any given frequency. In some respects, the multiple sets of RBs in an SL-BWP are frequency-adjacent. In some respects, the device may communicate using only a subset of the multiple sets of RBs in the SL-BWP (e.g., for transmitting S-SSB and / or PSFCH), where this subset of RBs is frequency-non-adjacent.

[0030] When performing sidelink communication, Quality of Service (QoS) and system performance can be affected by timing misalignment between wireless communication devices. Therefore, to maintain common time and frequency synchronization among the wireless communication devices, each wireless communication device can be synchronized to a synchronization source (such as a base station or Global Navigation Satellite System (GNSS)) or synchronized based on a time / frequency reference within the wireless communication device. One or more wireless communication devices can also generate and transmit synchronization information for use by other wireless communication devices when synchronizing radio frame timing (e.g., radio frame / slot boundaries and frame indexes) to the transmitting wireless communication device. For example, synchronization information may include a sidelink synchronization signal (S-SS). In some examples, the S-SS may be part of an S-SSB that includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS), and a physical sidelink broadcast channel (PSBCH). The S-SSB may also include a downlink modulation reference signal (DMRS) (such as in the PSBCH) or other signals used for synchronization.

[0031] In some respects, wireless communication devices (such as UEs) may transmit S-SSBs in multiple RB sets of an SL-BWP, such as reserving a COT in each of the multiple RB sets. In some respects, the wireless communication device transmits the same S-SSB in each of the multiple RB sets, meaning that the same information is transmitted as an S-SSB in each of the multiple RB sets. Transmitting the same S-SSB in each of the multiple RB sets can be referred to as transmitting S-SSB duplication in each of the multiple RB sets, where S-SSB duplication refers to instances of S-SSBs transmitted in RB sets.

[0032] In some respects, multiple wireless communication devices can transmit S-SSBs in an SL-BWP, and the receiving wireless communication device (such as a UE) can measure the DMRS in the PSBCH of the S-SSB to determine which of the multiple wireless communication devices the receiving wireless communication device should select as the synchronization reference device (e.g., SyncRef UE). The synchronization reference device can be the wireless communication device to which the receiving wireless communication device synchronizes its radio frames at the correct timing.

[0033] Specifically, each S-SSB indicates a Side Link Synchronization Signal (SLSS) Identifier (ID), which can be indicated by a sequence included in the S-PSS and S-SSS of the S-SSB. The SLSS ID represents the identifier of the wireless communication device transmitting the S-SSB and conveys the priority of the wireless communication device. The receiving wireless communication device measures the DMRS in the PSBCH of each S-SSB transmitted by multiple wireless communication devices (e.g., measuring the Reference Signal Received Power (RSRP) of the DMRS). Therefore, the receiving wireless communication device measures the RSRP of each S-SSB. Each S-SSB with an RSRP above a threshold (e.g., a threshold configured at the wireless communication device using Radio Resource Control (RRC) signaling) is considered a candidate synchronization reference for the receiving wireless communication device. As discussed, each S-SSB is further associated with an SLSS ID, which is associated with a priority. Therefore, each S-SSB is associated with a priority.

[0034] If only one of the S-SSBs among the candidate synchronization references of the receiving wireless communication device has the highest priority among the candidate synchronization references, the receiving wireless communication device selects the wireless communication device that sent that S-SSB (e.g., as identified by the SLSS ID) as the synchronization reference device for the receiving wireless communication device.

[0035] When multiple S-SSBs among the candidate synchronization references of the receiving wireless communication device have the same and highest priority among the candidate synchronization references, the receiving wireless communication device selects the wireless communication device that transmits the S-SSB with the highest RSRP among the multiple S-SSBs as the synchronization reference device for the receiving wireless communication device.

[0036] Therefore, the RSRP associated with the S-SSB is important for determining the synchronization reference device used by the receiving wireless communication device. The RSRP associated with the S-SSB is affected by the transmit power of the transmitted S-SSB. Specifically, when the wireless communication device uses a higher transmit power to transmit the S-SSB, the receiving wireless communication device is likely to receive the S-SSB at a higher power, resulting in a higher measured RSRP. Therefore, the power level of the transmitted S-SSB is important.

[0037] As discussed, in some aspects, wireless communication devices (such as UEs) can transmit S-SSBs in multiple RB sets of the SL-BWP, such as reserving a COT in each of the multiple RB sets. Furthermore, the wireless communication device may have certain power constraints for transmission. Therefore, the transmission power used to transmit S-SSBs in each of the multiple RB sets may be subject to power constraints, but it may also be important for the selection of the synchronization reference device. Therefore, there is a technical problem of how to determine the power level for transmitting S-SSBs in the multiple RB sets of the SL-BWP.

[0038] Some aspects provide a parameter known as the reference number (K) for transmitting S-SSBs in the SL-BWP, where the transmit power for transmitting S-SSBs in each of the multiple RB sets in the SL-BWP is based on K. In some aspects, the actual number of times the wireless communication device transmits S-SSBs is equal to K, such as when the wireless communication device transmits S-SSBs in K RB sets. In some aspects, the actual number of times the wireless communication device transmits S-SSBs is greater than K, such as when the wireless communication device transmits S-SSBs in more than K RB sets. Using the parameter K to determine the transmit power for transmitting S-SSBs in each of the multiple RB sets in the SL-BWP provides the technical effect of ensuring that the wireless communication device complies with power constraints for transmission, while providing higher transmit power for S-SSB transmission where feasible. This facilitates the appropriate selection of a synchronization reference device, as discussed herein. It also allows for increased S-SSB coverage.

[0039] In some aspects, when a wireless communication device transmits the same S-SSB on multiple RB sets, one of the RB sets can be the anchor RB set among the multiple RB sets. In some aspects, the anchor RB set is identified by information elements such as RRC signaling (e.g., sl-AbsoluteFrequencySSB-r16), such as those assigned to the receiving wireless communication device. In some aspects, the receiving wireless communication device is configured to measure only the DMRS in the PSBCH of the S-SSB transmitted in the anchor RB set, without measuring the other RB sets among the multiple RB sets, and thus uses the anchor RB set to determine the synchronization reference device. However, in some aspects, the receiving wireless communication device can combine S-SSBs received in each of the multiple RB sets to enhance the decoding of the S-SSB. In order to combine S-SSBs received in each of the multiple RB sets, the receiving wireless communication device may need information about which RB sets of the SL-BWP include S-SSBs other than the anchor RB set, because the receiving wireless communication device may need information about each RB set of the SL-BWP included in the multiple RB sets used by the wireless communication device to transmit S-SSBs. Therefore, there is a technical problem of how to identify which RB sets of the SL-BWP include S-SSBs.

[0040] In some aspects, one or more bits are provided in the DMRS of the PSBCH of the S-SSB communicated in the anchor RB set, wherein the one or more bits indicate which RB sets of the SL-BWP include the S-SSB. For example, one or more bits may be scrambled in the DMRS. Providing one or more bits provides the technical effect of giving the receiving wireless communication device an indication of where the repetition of the S-SSB is communicated, allowing the receiving wireless communication device to combine the repetition of the S-SSB to improve decoding performance.

[0041] Introduction to Wireless Communication Networks

[0042] The techniques and methods described herein can be used in a variety of wireless communication networks. While aspects may be described herein using terms commonly associated with 3G, 4G, and / or 5G wireless technologies, aspects of this disclosure are equally applicable to other communication systems and standards not explicitly mentioned herein.

[0043] FIG. 1 An example of a wireless communication network 100 in which the aspects described herein can be implemented is depicted.

[0044] Generally, wireless communication network 100 includes various network entities (optionally, network elements or network nodes). Network entities are typically communication devices and / or communication functions performed by communication devices (e.g., user equipment (UE), base station (BS), components of the BS, servers, etc.). Since such communication devices are part of wireless communication network 100 and facilitate wireless communication, they may be referred to as wireless communication devices. For example, various functions of the network and various devices associated with and interacting with the network may be considered network entities. Furthermore, wireless communication network 100 includes terrestrial and non-terrestrial aspects. The terrestrial aspect includes ground-based network entities (e.g., BS 102), and the non-terrestrial aspect includes satellite 140 and aircraft 145, which may include onboard network entities (e.g., one or more BSs) capable of communicating with other network elements (e.g., terrestrial BSs) and UEs.

[0045] In the depicted example, wireless communication network 100 includes BS 102, UE 104 and one or more core networks (such as Evolved Packet Core (EPC) 160 and 5G Core (5GC) network 190) that interoperate to provide communication services over various communication links, including wired and wireless links.

[0046] FIG. 1 Various example UEs 104 are described, which may more generally include: cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players, cameras, game consoles, tablets, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, Internet of Things (IoT) devices, always-on (AON) devices, edge processing devices, or other similar devices. UE 104 may also be more generally referred to as mobile devices, wireless devices, stations, mobile stations, subscriber stations, mobile subscriber stations, mobile units, subscriber units, wireless units, remote units, remote devices, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, and others.

[0047] BS 102 communicates wirelessly with UE 104 via communication link 120 (e.g., transmitting or receiving signals to or from UE 104). Communication link 120 between BS 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to BS 102 and / or downlink (DL) (also known as forward link) transmission from BS 102 to UE 104. In various aspects, communication link 120 may utilize multiple-input multiple-output (MIMO) antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity.

[0048] BS 102 may typically include: NodeB, enhanced NodeB (eNB), next-generation enhanced NodeB (ng-eNB), next-generation NodeB (gNB or gNodeB), access point, transceiver base station, radio base station, radio transceiver, transceiver functionality, transmit / receive point, and / or others. Each of BS 102 provides communication coverage for a corresponding coverage area 110, which may sometimes be referred to as a cell, and in some cases may overlap (e.g., a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of a macro cell). For example, BS may provide communication coverage for macro cells (covering relatively large geographic areas), pico cells (covering relatively small geographic areas, such as stadiums), femtocells (relatively small geographic areas (e.g., homes)), and / or other types of cells.

[0049] Although BS 102 is described as a single communication device in various aspects, it can be implemented in a variety of configurations. For example, to give a few examples, one or more components of the base station can be decomposed, including a central unit (CU), one or more distributed units (DU), one or more radio units (RU), a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC. In another example, various aspects of the base station can be virtualized. More generally, a base station (e.g., BS 102) can include components located at a single physical location or components located at various physical locations. In examples where the base station includes components located at various physical locations, the various components can each perform functions, such that the various components collectively achieve functionality similar to a base station located at a single physical location. In some aspects, a base station including components located at various physical locations can be referred to as a decomposed radio access network architecture (such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture). FIG. 2 An example decomposed base station architecture is depicted and described.

[0050] Different BSs 102 within the wireless communication network 100 can also be configured to support different radio access technologies (such as 3G, 4G, and / or 5G). For example, a BS 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). A BS 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) can interface with 5GC 190 via a second backhaul link 184. BSs 102 can communicate directly or indirectly with each other (e.g., via EPC 160 or 5GC 190) via a third backhaul link 134 (e.g., X2 interface), which can be wired or wireless.

[0051] Wireless communication network 100 can subdivide the electromagnetic spectrum into various categories, bands, channels, or other characteristics. In some aspects, subdivision is provided based on wavelength and frequency, where frequency may also be referred to as carrier, subcarrier, channel, tone, or subband. For example, 3GPP currently defines frequency range 1 (FR1) as including 410MHz to 7125MHz, which is often (interchangeably) referred to as “sub-6GHz”. Similarly, 3GPP currently defines frequency range 2 (FR2) as including 24,250MHz to 52,600MHz, which is sometimes (interchangeably) referred to as “millimeter wave” (“mmW” or “mmWave”). Base stations configured to communicate using mmWave / near mmWave radio bands (e.g., mmWave base stations such as BS 180) can utilize beamforming (e.g., 182) with UEs (e.g., 104) to improve path loss and range.

[0052] The communication link 120 between BS 102 and, for example, UE 104 can be via one or more carriers, which may have different bandwidths (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz and / or other MHz) and may be aggregated in various ways. The carriers may be adjacent to each other or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL).

[0053] Compared to lower-frequency communication, communication using higher frequency bands can have higher path loss and shorter range. Therefore, some base stations (e.g., FIG. 1The beamforming 182 of the BS 180 (180) with the UE 104 can be used to improve path loss and range. For example, the BS 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming. In some cases, the BS 180 may transmit beamformed signals to the UE 104 in one or more transmit directions 182''. The UE 104 may receive beamformed signals from the BS 180 in one or more receive directions 182''. The UE 104 may also transmit beamformed signals to the BS 180 in one or more transmit directions 182''. The BS 180 may also receive beamformed signals from the UE 104 in one or more receive directions 182''. The BS 180 and UE 104 may then perform beamforming training to determine the optimal receive and transmit directions for each of the BS 180 and UE 104. It is worth noting that the transmit and receive directions of the BS 180 may be the same or different. Similarly, the sending and receiving directions of UE 104 may be the same or different.

[0054] The wireless communication network 100 also includes a Wi-Fi AP 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in, for example, unlicensed spectrum in 2.4 GHz and / or 5 GHz.

[0055] Some UEs 104 may use device-to-device (D2D) communication links 158 to communicate with each other. The D2D communication link 158 may use one or more sidelink channels, such as physical sidelink broadcast channel (PSBCH), physical sidelink discovery channel (PSDCH), physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), and / or physical sidelink feedback channel (PSFCH).

[0056] EPC 160 may include various functional components, including: such as the Mobility Management Entity (MME) 162 in the illustrated example, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and / or Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connectivity management.

[0057] Generally, user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP service 176, which may include, for example, the Internet, intranet, IP Multimedia Subsystem (IMS), packet switching (PS) streaming service, and / or other IP services.

[0058] The BM-SC 170 provides functions for MBMS user service dispatch and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, can authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and / or can schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS services to BS 102 in a Broadcast-Specific Service Single Frequency Network (MBSFN) area, and / or can be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0059] 5GC 190 may include various functional components, including: Access and Mobility Management Function (AMF) 192, other AMFs 193, Session Management Function (SMF) 194, and User Plane Function (UPF) 195. AMF 192 can communicate with Unified Data Management (UDM) 196.

[0060] AMF 192 is the control node that handles signaling between UE 104 and 5GC 190. AMF 192 provides services such as Quality of Service (QoS) flow and session management.

[0061] Internet Protocol (IP) packets are transmitted via UPF 195, which connects to IP service 197 and provides the UE with IP address allocation and other functions for 5GC 190. IP service 197 may include, for example, the Internet, intranet, IMS, PS streaming service, and / or other IP services.

[0062] In various aspects, to give a few examples, network entities or network nodes can be implemented as aggregated base stations, decomposed base stations, components of base stations, integrated access and backhaul (IAB) nodes, relay nodes, and sidelink nodes.

[0063] FIG. 2An example decomposed base station 200 architecture is depicted. The decomposed base station 200 architecture may include one or more central units (CUs) 210, which may communicate directly with the core network 220 via a backhaul link, or indirectly with the core network 220 via one or more decomposed base station units, such as a near real-time (near-RT) RAN Intelligent Controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a Service Management and Orchestration (SMO) framework 205, or both. CUs 210 may communicate with one or more distributed units (DUs) 230 via corresponding midhaul links (such as F1 interfaces). DUs 230 may communicate with one or more radio units (RUs) 240 via corresponding fronthaul links. RUs 240 may communicate with a corresponding UE 104 via one or more radio frequency (RF) access links. In some specific implementations, UE 104 may be served simultaneously by multiple RUs 240.

[0064] Each unit in a cell (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RT RIC 215, and SMO frame 205) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the cell, or an associated processor or controller providing instructions to the unit's communication interface, may be configured to communicate with one or more other units via transmission media. For example, these units may include wired interfaces configured to receive signals or transmit signals to one or more other units via wired transmission media. Additionally or alternatively, a unit may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) configured to receive signals on a wireless transmission medium or transmit signals to one or more other units, or both.

[0065] In some aspects, CU 210 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC), Packet Data Convergence Protocol (PDCP), Serving Data Adaptation Protocol (SDAP), etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by CU 210. CU 210 can be configured to handle user plane functions (e.g., Central Unit-User Plane (CU-UP)), control plane functions (e.g., Central Unit-Control Plane (CU-CP)), or combinations thereof. In some implementations, CU 210 can be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, CU-UP units can communicate bidirectionally with CU-CP units via an interface such as an E1 interface. CU 210 can be implemented to communicate with DU 230 for network control and signaling, as needed.

[0066] DU 230 may correspond to a logical unit comprising one or more base station functions for controlling the operation of one or more RU 240s. In some aspects, DU 230 may at least partially host one or more of the Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) according to functional splits (such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 230 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0067] Lower-layer functionality can be implemented by one or more RU 240s. In some deployments, the RU240 controlled by the DU 230 may correspond to a logical node that hosts RF processing functions or low-PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, or Physical Random Access Channel (PRACH) extraction and filtering, or both, at least in part based on functional decomposition (such as lower-layer functional decomposition). In such architectures, the RU 240 may be implemented to handle over-the-air (OTA) communications with one or more UE 104s. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration allows the DU 230 and CU 210 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0068] SMO framework 205 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, SMO framework 205 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, SMO framework 205 can be configured to interact with a cloud computing platform such as Open Cloud (O-Cloud) 290 to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some implementations, SMO framework 205 can communicate with hardware aspects of the 4G RAN such as Open eNB (O-eNB) 211 via the O1 interface. Additionally, in some implementations, SMO framework 205 can communicate directly with one or more RU 240s via the O1 interface. SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of SMO framework 205.

[0069] The non-RT RIC 215 can be configured to include logical functions that enable non-real-time control and optimization of RAN elements and resources, including artificial intelligence / machine learning (AI / ML) workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 225. The non-RT RIC 215 can be coupled to or communicate with the near-RT RIC 225, such as via an A1 interface. The near-RT RIC 225 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via an interface, such as via an E2 interface, through data collection and actions, connecting one or more CU 210s, one or more DU 230s, or both, and O-eNBs to the near-RT RIC 225.

[0070] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 225 and can be received from non-network data sources or network functions at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns in performance and employ AI / ML models to perform corrective actions via the SMO framework 205 (such as reconfiguration via O1) or by creating RAN management policies (such as A1 policies).

[0071] FIG. 3 Various aspects of examples BS 102 and UE 104 are described.

[0072] Generally, BS 102 includes various processors (e.g., 320, 330, 338, and 340), antennas 334a-334t (collectively referred to as 334), transceivers 332a-332t (collectively referred to as 332) including modulators and demodulators, and other aspects that enable the wireless transmission of data (e.g., data source 312) and the wireless reception of data (e.g., data sink 339). For example, BS 102 can transmit and receive data between BS 102 and UE 104. BS 102 includes a controller / processor 340 that can be configured to implement the various functions described herein related to wireless communication.

[0073] Generally, UE 104 includes various processors (e.g., 358, 364, 366, and 380), antennas 352a-352r (collectively referred to as 352), transceivers 354a-354r (collectively referred to as 354) including modulators and demodulators, and other aspects that enable the wireless transmission of data (e.g., retrieved from data source 362) and the wireless reception of data (e.g., provided to data sink 360). UE 104 includes a controller / processor 380 that can be configured to implement the various functions described herein related to wireless communication.

[0074] Regarding example downlink transmission, BS 102 includes a transmission processor 320 that can receive data from data source 312 and control information from controller / processor 340. This control information may be for a Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Common PDCCH (GC PDCCH), and / or others. In some examples, this data may be for a Physical Downlink Shared Channel (PDSCH).

[0075] The transmitter processor 320 can process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmitter processor 320 can also generate reference symbols (such as those for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS)).

[0076] The transmit (TX) multiple-input multiple-output (MIMO) processor 330 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, and / or reference symbols where applicable, and can provide the output symbol stream to the modulators (MODs) in transceivers 332a-332t. Each modulator in transceivers 332a-332t can process its corresponding output symbol stream to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signal from the modulators in transceivers 332a-332t can be transmitted via antennas 334a-334t respectively.

[0077] To receive downlink transmissions, UE 104 includes antennas 352a-352r that receive downlink signals from BS 102 and provide the received signals to demodulators (DEMODs) in transceivers 354a-354r respectively. Each demodulator in transceivers 354a-354r can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator can further process the input sample to obtain the received symbols.

[0078] The RX MIMO detector 356 acquires received symbols from all demodulators in transceivers 354a-354r, performs MIMO detection on the received symbols where applicable, and provides the detected symbols. The receive processor 358 processes (e.g., demodulates, deinterleaves, and decodes) the detected symbols, provides the decoded data for UE 104 to data sink 360, and provides the decoded control information to controller / processor 380.

[0079] Regarding example uplink transmission, UE 104 also includes a transmit processor 364 that receives and processes data from data source 362 (e.g., for PUSCH) and control information from controller / processor 380 (e.g., for Physical Uplink Control Channel (PUCCH)). Transmit processor 364 may also generate reference symbols for reference signals (e.g., for Sounding Reference Signal (SRS)). Symbols from transmit processor 364 may be pre-decoded by TX MIMO processor 366, where applicable, further processed by modulators in transceivers 354a-354r (e.g., for SC-FDM), and transmitted to BS 102.

[0080] At BS 102, uplink signals from UE 104 can be received by antennas 334a-334t, processed by demodulators in transceivers 332a-332t, detected where applicable by RX MIMO detector 336, and further processed by receiver processor 338 to obtain decoded data and control information transmitted by UE 104. Receiver processor 338 can provide the decoded data to data sink 339 and the decoded control information to controller / processor 340.

[0081] Memory 342 and memory 382 can store data and program code for BS 102 and UE 104, respectively.

[0082] Scheduler 344 can schedule UE to transmit data on the downlink and / or uplink.

[0083] In various respects, BS 102 can be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, "transmitting" can refer to various mechanisms that output data, such as from data source 312, scheduler 344, memory 342, transmit processor 320, controller / processor 340, TX MIMO processor 330, transceiver 332a-332t, antenna 334a-334t, and / or other aspects described herein. Similarly, "receiving" can refer to various mechanisms that acquire data, such as from antenna 334a-334t, transceiver 332a-332t, RX MIMO detector 336, controller / processor 340, receive processor 338, scheduler 344, memory 342, and / or other aspects described herein.

[0084] In various respects, UE 104 can also be described as transmitting and receiving various types of data associated with the methods described herein. In these contexts, “transmitting” can refer to various mechanisms that output data, such as from data source 362, memory 382, ​​transmit processor 364, controller / processor 380, TX MIMO processor 366, transceiver 354a-354t, antenna 352a-352t, and / or other aspects described herein. Similarly, “receiving” can refer to various mechanisms that acquire data, such as from antenna 352a-352t, transceiver 354a-354t, RX MIMO detector 356, controller / processor 380, receive processor 358, memory 382, ​​and / or other aspects described herein.

[0085] In some respects, the processor can be configured to perform various operations (such as those associated with the methods described herein) and to send (output) data to or receive data from another interface configured to send or receive data, respectively.

[0086] FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D Describes the use of wireless communication networks (such as FIG. 1 All aspects of the data structure of the wireless communication network 100.

[0087] Specifically, FIG. 4A Figure 400 is an example of the first subframe within a 5G (e.g., 5G NR) frame structure. FIG. 4B Figure 430 illustrates an example of a DL channel within a 5G subframe. FIG. 4C Figure 450 illustrates an example of the second subframe within a 5G frame structure, and FIG. 4DFigure 480 illustrates an example of a UL channel within a 5G subframe.

[0088] Wireless communication systems can utilize Orthogonal Frequency Division Multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. Such systems can also support half-duplex operation using Time Division Duplex (TDD). OFDM and Single-Carrier Frequency Division Multiplexing (SC-FDM) will (e.g., as...) FIG. 4B and FIG. 4D The system bandwidth (as depicted in the text) is divided into multiple orthogonal subcarriers. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM and / or in the time domain using SC-FDM.

[0089] Wireless communication frame structures can be frequency division duplex (FDD), where for a specific set of subcarriers, subframes within that set are dedicated to either deep (DL) or ultra-low (UL). Wireless communication frame structures can also be time division duplex (TDD), where for a specific set of subcarriers, subframes within that set are dedicated to both DL and UL.

[0090] exist FIG. 4A and FIG. 4C In this example, the wireless communication frame structure is TDD, where D stands for DL, U for UL, and X is flexibly used between DL and UL. The UE can configure the time slot format using the received Time Slot Format Indicator (SFI) (dynamically via DL Control Information (DCI) or semi-statically / statically via Radio Resource Control (RRC) signaling). In the depicted example, a 10ms frame is divided into 10 equal-sized 1ms subframes. Each subframe may include one or more time slots. In some examples, each time slot may include 7 or 14 symbols, depending on the time slot format. Subframes may also include micro-slots, which typically have fewer symbols than the entire time slot. Other wireless communication technologies may have different frame structures and / or different channels.

[0091] In some respects, the number of time slots within a subframe is based on the time slot configuration and parameter set. For example, for time slot configuration 0, different parameter sets (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 time slots per subframe, respectively. For time slot configuration 1, different parameter sets 0 to 2 allow for 2, 4, and 8 time slots per subframe, respectively. Therefore, for time slot configuration 0 and parameter set μ, there are 14 symbols per time slot and 2µ time slots per subframe. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to... kHz, where μ is the parameter set from 0 to 5. Therefore, the parameter set... It has a subcarrier spacing of 15 kHz and a parameter set It has a subcarrier spacing of 480 kHz. The symbol length / duration is negatively correlated with the subcarrier spacing.FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D It provides slot configuration 0 with 14 symbols per slot and parameter set with 4 slots per subframe. Example: The time slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0092] like FIG. 4A , FIG. 4B , FIG. 4C and FIG. 4D As depicted, the resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)) extending for, for example, 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0093] like FIG. 4A As illustrated in the example, some REs in the RE carry information for the UE (e.g., FIG. 1 and FIG. 3 The reference (pilot) signal (RS) for the UE (104) may include a demodulation RS (DMRS) and / or a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0094] FIG. 4B Examples of various DL channels within a subframe of a frame are illustrated. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising, for example, nine RE groups (REGs), each REG comprising, for example, four consecutive REs in an OFDM symbol.

[0095] The Primary Synchronization Signal (PSS) can be located within symbol 2 of a specific subframe of the frame. The PSS is generated by the UE (e.g., FIG. 1 and FIG. 3 104) is used to determine subframe / symbol timing and physical layer identifier.

[0096] The secondary synchronization signal (SSS) can be located in symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the physical layer cell identifier group number and radio frame timing.

[0097] Based on the Physical Layer Identifier and Physical Layer Cell Identifier Group Number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DMRS. The Physical Broadcast Channel (PBCH), carrying the Master Information Block (MIB), can be logically grouped with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block. The MIB provides the System Frame Number (SFN) and the number of Restricted Frames (RBs) in the system bandwidth. The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information (such as System Information Blocks (SIBs)) not transmitted via the PBCH, and / or paging messages.

[0098] like FIG. 4C As illustrated, some REs in the REs carry DMRS for channel estimation at the base station (indicated as R for a particular configuration, but other DMRS configurations are possible). The UE can transmit DMRS for PUCCH and DMRS for PUSCH. PUSCH DMRS can be transmitted, for example, in the first or second symbol before the PUSCH. PUCCH DMRS can be transmitted in different configurations depending on whether a short or long PUCCH is being transmitted and depending on the specific PUCCH format used. UE104 can transmit a Sounding Reference Signal (SRS). SRS can be transmitted, for example, in the last symbol of a subframe. SRS can have a comb structure, and the UE can transmit SRS on one of the comb teeth. SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling of the UL.

[0099] FIG. 4D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH can be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), pre-decoding matrix indicators (PMI), rank indicators (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSR), power clearance reports (PHR), and / or UCI.

[0100] Aspects Related to Power Control for Transmission of S-SSBs

[0101] As discussed, some aspects provide a parameter K referred to as the reference number of times S-SSBs are transmitted in the SL-BWP, wherein the transmission power used to transmit S-SSBs in each of the multiple RB sets in the SL-BWP is based on K. For example, in some aspects, wireless communication devices (such as...) FIG. 1 and FIG. 3 UE 104) from another wireless communication device (such as a network entity, such as FIG. 1 and FIG. 3 BS 102 or as aboutFIG. 2 The decomposed base station under discussion receives signaling (e.g., RRC signaling). This signaling includes an indication of K, which is the reference number of times the S-SSB is transmitted in the SL-BWP.

[0102] In some respects, wireless communication devices use K to determine (e.g., calculate) the maximum transmit (TX) power available for the wireless communication device to transmit S-SSBs in a single RB set, also known as the maximum transmit power per RB set or P. S-SSB_MAX_RB_SET In some respects, for each of the multiple RB sets in which a wireless communication device transmits an instance of S-SSB, P S-SSB_MAX_RB_SET They are the same. For example, a wireless communication device may have a maximum transmit power that it can transmit (e.g., P). CMAX ), such as 23dB. In some respects, P CMAX It is pre-configured at the wireless communication device or configured via signaling (such as RRC signaling from another wireless communication device). In some respects, P is calculated according to the following equation (1). S-SSB_MAX_RB_SET : P S-SSB_MAX_RB_SET =P CMAX -10 log(K)dBm (1) The actual transmit power P of a wireless communication device used to transmit a given instance of an S-SSB in a single RB set. S-SSB_RB_SET It can be equal to or less than P S-SSB_MAX_RB_SET For example, wireless communication devices can use power control (e.g., S-SSB power control), which will control P S-SSB_RB_SET Set to P S-SSB_MAX_RB_SET The minimum of the two, P and the power control function, which is based on one or more S-SSB power control parameters (e.g., downlink path loss, one or more constants, etc.). Therefore, P S-SSB_RB_SET Based on P S-SSB_MAX_RB_SET The P S-SSB_MAX_RB_SET Based on K, and therefore P S-SSB_RB_SET Based on K.

[0103] In some respects, for each of the multiple RB sets in which a wireless communication device transmits an instance of S-SSB, P S-SSB_RB_SET They are the same. In some respects, for different sets of RBs in multiple sets of RBs in which a wireless communication device transmits an instance of S-SSB, P S-SSB_RB_SET They can be different, such as if the power control function has different values ​​for different sets of RBs (e.g., based on different downlink path losses).

[0104] In some aspects, as discussed, a wireless communication device may be configured to transmit S-SSBs in multiple sets of RBs, where the number of multiple sets of RBs is N. For example, as discussed, a wireless communication device may have N sets of RBs on which to reserve or maintain a COT. Based on K, the actual number of RBs sets on which the wireless communication device transmits S-SSBs may be equal to or less than N, as further discussed herein.

[0105] In some aspects, when N < K, the wireless communication device is configured to transmit S-SSBs in all N sets of RBs such that the actual number of RBs sets on which the wireless communication device transmits S-SSBs is equal to N. Specifically, if N < K, the total transmission power (e.g., (P CMAX -10 log(K)) N or less) for transmitting S-SSBs in all N sets of RBs is less than P CMAX . Thus, the wireless communication device may reserve or maintain a COT on all N sets of RBs, thereby helping to reduce potential interference from other devices performing LBT, and also advantageously transmitting each S-SSB at a transmit power of up to P CMAX -10 log(K), which helps with the RSRP of the S-SSB to assist in synchronized reference device selection, as discussed.

[0106] FIG. 5 Illustrates an example of communicating S-SSB 502 in each of multiple sets of RBs of a SL-BWP. As FIG. 5 shown, the wireless communication device is configured to transmit S-SSB 502 in four sets of RBs 1-4 such that N = 4. In one example, assume K = 5, N < K, and thus the wireless communication device transmits S-SSB 502 in each of RBs sets 1-4.

[0107] In some aspects, when N ≥ K and the total transmission / transmit power for transmitting S-SSBs in all N sets of RBs (e.g., using P S-SSB_RB_SET ) is less than or equal to P CMAX (e.g., N P S-SSB_RB_SET ≤ P CMAX ), the wireless communication device is configured to transmit S-SSBs in all N sets of RBs such that the actual number of RBs sets on which the wireless communication device transmits S-SSBs is equal to N. Thus, the wireless communication device may reserve or maintain a COT on all N sets of RBs, thereby helping to reduce potential interference from other devices performing LBT, and also advantageously at a transmit power that satisfies PCMAX to transmit each S-SSB with the required total transmit power.

[0108] Return to FIG. 5 , assuming K = 3, since N = 4, then N ≥ K. Assume 4 P S-SSB_RB_SET ≤ P CMAX , the wireless communication device transmits S-SSB 502 in each of the RB sets 1-4.

[0109] In some aspects, when N ≥ K, and the total transmit / transmission power for transmitting S-SSB in all N RB sets (e.g., using P S-SSB_RB_SET ) is greater than P CMAX (e.g., N P S-SSB_RB_SET > P CMAX ), the wireless communication device is configured to transmit S-SSB in M RB sets, where M < N, such that the actual number M of RB sets on which the wireless communication device transmits S-SSB is less than N. In some aspects, M is selected (e.g., by the wireless communication device) such that the total transmit / transmission power for transmitting S-SSB in M RB sets (e.g., using P S-SSB_RB_SET ) is less than or equal to P CMAX (e.g., M P S-SSB_RB_SET ≤ P CMAX ), such that the wireless communication device meets the requirement of P CMAX . For example, M can be selected to satisfy M P S-SSB_RB_SET ≤ P CMAX . Thus, the wireless communication device can reserve or maintain COT on as many RB sets as possible in the N RB sets, thereby helping to reduce potential interference from other devices performing LBT, and also beneficially transmitting S-SSB with the total transmit power that meets the requirement of P CMAX .

[0110] In some aspects, the wireless communication device selects the anchor RB set used by the receiving wireless communication device that receives the S-SSB as one of the M RB sets.

[0111] In some aspects, the wireless communication device randomly selects the remaining M - 1 RB sets other than the anchor RB set from the remaining N - 1 RB sets (e.g., excluding the anchor RB set from the N RB sets). Random selection can reduce the processing complexity of determining the M RB sets, or can provide randomized coverage of the S-SSB during COT to help reduce interference.

[0112] FIG. 6An example is shown of communicating S-SSB 602 in each of the multiple RB sets in the SL-BWP. For example... FIG. 6 As shown, the wireless communication device is configured to transmit S-SSB 602 in four RB sets 1-4, such that N=4. In this example, RB set 2 is the anchor RB set. In another example, assuming K=2 and M=3, the wireless communication device selects RB set 2 (the anchor RB set) as one of the M RB sets. Furthermore, the wireless communication device randomly selects two other RB sets from the M RB sets as RB set 1 and RB set 4, such that the wireless communication device transmits S-SSB 602 in RB sets 1, 2, and 4.

[0113] In some respects, a wireless communication device selects M-1 RB sets remaining besides the anchor RB set, such that the M RB sets are frequency-contiguous, meaning that there are no other RB sets between the selected M RB sets. For example, the M RB sets can be frequency-adjacent. Transmitting S-SSB in a contiguous frequency RB set can reduce out-of-band interference from the M RB sets of another device that could transmit in one of the N RB sets that was not selected.

[0114] FIG. 7 An example is shown illustrating the communication of S-SSB 702 in each of the multiple RB sets in the SL-BWP. For example... FIG. 7 As shown, the wireless communication device is configured to transmit S-SSB 702 in four RB sets 1-4, such that N=4. In this example, RB set 2 is the anchor RB set. In one example, assuming K=2 and M=3, the wireless communication device selects RB set 2 (the anchor RB set) as one of the M RB sets. Furthermore, the wireless communication device selects two other RB sets consecutive to RB set 2 from the M RB sets, such as RB set 2 and RB set 4, such that the wireless communication device transmits S-SSB 702 in RB sets 2-4. Although not shown, in this example, the wireless communication device could similarly select RB sets 1-3.

[0115] In some respects, wireless communication devices select the remaining M-1 RB sets, excluding the anchor RB set, based on priority values ​​associated with PSSCH transmissions scheduled on RB sets. For example, a wireless communication device may reserve or maintain a COT on N RB sets for transmission in the PSSCH of each of the N RB sets, such as after transmitting an S-SSB. PSSCH transmissions may each have an associated priority value (PV), such that a lower value represents a higher priority. A wireless communication device may be configured to select M-1 RB sets as the M-1 RB sets with the highest priority among the N RB sets for scheduled PSSCH transmission. For example, a wireless communication device may be configured to select M-1 RB sets in ascending order of their corresponding priority values ​​on subsequent PSSCHs. Transmitting an S-SSB in the RB set with higher priority PSSCHs helps ensure that other devices do not transmit during the COT period in the RB set with higher priority PSSCHs, thereby reducing the chance of interference from higher-priority PSSCHs instead of lower-priority PSSCHs.

[0116] FIG. 8 An example is shown illustrating the communication of S-SSB 802 in each of the multiple RB sets in the SL-BWP. For example... FIG. 8 As shown, the wireless communication device is configured to transmit S-SSB 802 in four RB sets 1-4, such that N=4. In this example, RB set 2 is the anchor RB set. In one example, assuming K=2 and M=3, the wireless communication device selects RB set 2 (the anchor RB set) as one of the M RB sets. Furthermore, the wireless communication device selects two other RB sets from the M RB sets as those RB sets with the highest priority PSSCH among the remaining N-1 RB sets. Here, RB set 4 has a PSSCH with priority value 1, RB set 3 has a PSSCH with priority value 2, and RB set 1 has a PSSCH with priority value 5. Therefore, RB sets 3 and RB set 4 are selected such that the wireless communication device transmits S-SSB 802 in RB sets 2-4.

[0117] In some respects, the receiving wireless communication device that receives S-SSBs can monitor only the S-SSBs in the anchor RB set within the SL-BWP, as discussed.

[0118] Aspects Related to Indicating Transmission Locations of S-SSBs

[0119] As discussed, the receiving wireless communication device is configured to measure only the DMRS in the PSBCH of the S-SSB transmitted in the anchor RB set, without measuring the other RB sets in the multiple RB sets of the SL-BWP, and thus uses the anchor RB set to determine the synchronization reference device. However, in some aspects, the receiving wireless communication device may combine the S-SSBs received in each of the multiple RB sets to enhance the decoding of the S-SSBs. For example, S-SSB combination can be used for a 1% PSBCH block error rate (BLER) detection probability of a low signal-to-noise ratio (SNR) S-SSB. In order to combine the S-SSBs received in each of the multiple RB sets, the receiving wireless communication device may need information about which RB sets of the SL-BWP include S-SSBs other than the anchor RB set, since information about each RB set of the SL-BWP included in the multiple RB sets used by the wireless communication device to transmit the S-SSBs may be required in the receiving wireless communication device.

[0120] Some aspects provide one or more bits in the DMRS of the PSBCH of the S-SSB communicated in the anchor RB set, wherein the one or more bits indicate which RB set(s) of the SL-BWP includes the S-SSB. For example, the one or more bits may be carried by the DMRS, such as being scrambled in the DMRS. The receiving wireless communication device can then combine the S-SSBs received in each RB set in the RB set indicated by the one or more bits.

[0121] In some respects, one or more bits (e.g., corresponding to resource indicator values) indicate the first RB set in the frequency range that includes the S-SSB and the number of RB sets that include the S-SSB among multiple RB sets in the SL-BWP. Specifically, the S-SSB transmission can be in consecutive RB sets in the frequency range. Therefore, the receiving wireless communication device can determine that the S-SSB is in the first RB set and in consecutive RB sets from the first RB set to the indicated number of RB sets.

[0122] For example, return to FIG. 7 One or more bits may indicate the first RB set as RB set 2 and the number of RB sets as 3, such that one or more bits indicate that RB sets 2-4 include S-SSB 702.

[0123] In some respects, one or more bits represent a relative bitmap that indicates which RB sets, starting from the anchor RB set, include the S-SSB. For example, each bit of the bitmap (e.g., starting from the most significant bit (MSB) or least significant bit (LSB)) maps to one of the RB sets other than the anchor RB set. In the example, the first bit (e.g., the MSB or LSB) maps to an RB set that is contiguous to the anchor RB set (e.g., with a higher or lower frequency). Subsequent bits map to another contiguous RB set. Furthermore, if the end of an RB set is reached (e.g., the highest or lowest frequency) and additional bits are present, the bit mapping wraps around to the other end of the RB set. Therefore, the number of one or more bits is one less than the number of RB sets in the SL-BWP. The RB sets that include the S-SSB do not need to be contiguous.

[0124] For example, return to FIG. 6 The anchor RB set can be RB set 2, and S-SSB 602 is transmitted in RB sets 1, 2, and 4. Therefore, one or more bits can be 011, where MSB 0 indicates that a consecutive RB set with a higher frequency than RB set 2 (i.e., RB set 3) does not include S-SSB. The next bit 1 indicates that a consecutive RB set with a higher frequency than RB set 3 (i.e., RB set 4) does include S-SSB 602. Since RB set 4 is the end of RB sets 1-4, the bit mapping wraps around to the other end of the RB sets (i.e., wraps around to RB set 1), such that the next bit 1 indicates that RB set 1 does include S-SSB 602.

[0125] In some respects, one or more bits represent an absolute bitmap that indicates which RB sets in the SL-BWP include the S-SSB. For example, each bit of the bitmap (e.g., starting from the most significant bit (MSB) or least significant bit (LSB)) maps to one RB set in the SL-BWP. In the example, the first bit (e.g., the MSB or LSB) maps to the highest or lowest frequency RB set. Subsequent bits map to other consecutive RB sets. Therefore, the number of one or more bits is equal to the number of RB sets in the SL-BWP. The RB sets that include the S-SSB do not need to be consecutive.

[0126] For example, return to FIG. 6The anchor RB set can be RB set 2, and S-SSB 602 is transmitted in RB sets 1, 2, and 4. Therefore, one or more bits can be 1101, where MSB 1 indicates that the RB set with the lowest frequency (i.e., RB set 1) does indeed include S-SSB 602. The next bit 1 indicates that a consecutive RB set with a higher frequency than RB set 1 (i.e., RB set 2) does indeed include S-SSB 602. The next bit 0 indicates that a consecutive RB set with a higher frequency than RB set 2 (i.e., RB set 3) does not include S-SSB 602. The next bit 1 indicates that a consecutive RB set with a higher frequency than RB set 3 (i.e., RB set 4) does indeed include S-SSB 602.

[0127] Example Operations

[0128] FIG. 9 It shows a device (such as) FIG. 1 and FIG. 3 Method 900 for wireless communication of UE 104.

[0129] Method 900 begins at step 905, receiving an indication of the reference number of times the S-SSB is sent in the SL-BWP.

[0130] Then, method 900 proceeds to step 910, in which a first S-SSB is transmitted in each of the plurality of RB sets using a first transmit power, wherein the first transmit power is based on a reference number of times the S-SSB is transmitted.

[0131] In some respects, step 905 includes receiving an indication of the reference number of times the S-SSB has been sent via RRC signaling.

[0132] In some respects, the first transmission power based on the reference number of S-SSB transmissions includes: the maximum transmission power per RB set based on the reference number of S-SSB transmissions; and the first transmission power based on the maximum transmission power per RB set and one or more S-SSB power control parameters.

[0133] In some respects, the number of multiple RB sets is based on the number of RB sets on which the device needs to maintain COT.

[0134] In some respects, the number of RB sets on which the device needs to maintain COT is less than the number of references for transmitting S-SSB, and the number of multiple RB sets is equal to the number of RB sets on which the device needs to maintain COT.

[0135] In some respects, the number of multiple RB sets is equal to the number of RB sets on which the device intends to maintain a COT: the number of RB sets on which the device intends to maintain a COT is greater than or equal to the reference number of times an S-SSB is transmitted; and the total transmission power of transmitting the first S-SSB in each of the multiple RB sets using the first transmission power is less than or equal to the maximum total transmission power of the device.

[0136] In some respects, the number of multiple RB sets is less than the number of RB sets on which the device needs to maintain COT: the number of RB sets on which the device needs to maintain COT is greater than or equal to the reference number of times the S-SSB is transmitted; and the total transmission power of transmitting the first S-SSB in each of the multiple RB sets using the first transmission power is greater than the maximum total transmission power of the device.

[0137] In some respects, the multiple RB sets include the anchor RB set of the SL-BWP and one or more RB sets, which are randomly selected from the RB sets on which the device is to maintain COT.

[0138] In some respects, multiple RB sets are frequency-continuous RB sets in the RB set on which the device maintains COT, and wherein multiple RB sets include the anchor RB set of SL-BWP.

[0139] In some respects, the multiple RB sets include the anchor RB set of the SL-BWP and one or more RB sets selected from the RB sets on which the device wants to maintain COT based on a priority value associated with a PSSCH transmission scheduled on the RB set on which the device wants to maintain COT.

[0140] In some respects, method 900 or any aspect thereof may be made by means of a device (such as...) FIG. 11 The communication device 1100 performs the execution, and the device includes various components capable of operating, being configured, or adapted to perform the method 900. The communication device 1100 is described in more detail below.

[0141] It should be noted that FIG. 9 This is merely one example of a method, and other methods that include fewer, additional, or alternative steps may also be consistent with this disclosure.

[0142] FIG. 10 It shows a device (such as) FIG. 1 and FIG. 3 Method 1000 for wireless communication of UE 104.

[0143] Method 1000 begins at step 1005, receiving a PSBCH including DMRS in the anchor RB set of the SL-BWP, which includes multiple RB sets, the DMRS carrying one or more bits that identify one or more RB sets among the multiple RB sets as including a first S-SSB.

[0144] Then, method 1000 proceeds to step 1010, receiving the first S-SSB in each of one or more RB sets.

[0145] In some respects, one or more bits indicate the first RB set at a frequency to be included in one or more RB sets and the number of one or more RB sets, wherein the one or more RB sets are consecutive RB sets at frequencies among the multiple RB sets.

[0146] In some respects, one or more bits are resource indicator values.

[0147] In some respects, the number of one or more bits is one less than the number of multiple RB sets, and each of the one or more bits maps to a different RB set in the multiple RB sets other than the anchor RB set.

[0148] In some respects, the number of one or more bits is equal to the number of multiple RB sets, and each bit in one or more bits maps to a different RB set in the multiple RB sets.

[0149] In some respects, method 1000 also includes combining the first S-SSB received in each of one or more sets of RBs to decode the first S-SSB.

[0150] In some respects, method 1000 or any aspect thereof may be made by means of a device (such as...) FIG. 12 The communication device 1200 is used to perform the method 1000. The device includes various components that are operable to, configured to, or adapted to perform the method 1000. The communication device 1200 is described in more detail below.

[0151] It should be noted that FIG. 10 This is merely one example of a method, and other methods that include fewer, additional, or alternative steps may also be consistent with this disclosure.

[0152] Example Communication Devices

[0153] FIG. 11 Various aspects of the example communication device 1100 are described. In some aspects, the communication device 1100 is user equipment, such as those described above. FIG. 1 and FIG. 3 The UE 104 described.

[0154] Communication device 1100 includes a processing system 1105 coupled to a transceiver 1145 (e.g., a transmitter and / or receiver). The transceiver 1145 is configured to transmit and receive signals for communication device 1100 via antenna 1150, such as the various signals described herein. The processing system 1105 may be configured to perform processing functions of communication device 1100, including processing signals received by and / or to be transmitted by communication device 1100.

[0155] Processing system 1105 includes one or more processors 1110. In various aspects, the one or more processors 1110 can represent, as with respect to... FIG. 3 The described receiver processor 358, transmitter processor 364, TX MIMO processor 366, and / or controller / processor 380 are one or more of these. One or more processors 1110 are coupled to a computer-readable medium / memory 1125 via a bus 1140. In some aspects, the computer-readable medium / memory 1125 is configured to store instructions (e.g., computer-executable code) that, when executed by one or more processors 1110, enable one or more processors 1110 to execute and cause the one or more processors to perform actions related to... FIG. 9 The described method 900 or any aspect thereof, including regarding FIG. 9 Any additional steps or sub-steps described; and regarding FIG. 10 The described method 1000 or any aspect thereof, including regarding FIG. 10 Any additional steps or sub-steps described. Note that references to processors performing the functions of communication device 1100 may include one or more processors, such as those performing the functions of communication device 1100 in a distributed manner.

[0156] In the depicted example, computer-readable medium / memory 1125 stores code 1130 for receiving and code 1135 for transmitting. Processing of code 1130 and code 1135 for transmitting enables communication device 1100 to perform and allow the communication device to perform actions related to... FIG. 9 The described method 900 or any aspect thereof; and regarding FIG. 10 The method 1000 described or any aspect thereof.

[0157] One or more processors 1110 include circuitry configured to implement (e.g., execute) code stored in computer-readable medium / memory 1125, including circuitry 1115 for receiving and circuitry 1120 for transmitting. Processing using the circuitry 1115 for receiving and the circuitry 1120 for transmitting enables the communication device 1100 to perform and allow the communication device to perform actions related to... FIG. 9The described method 900 or any aspect thereof; and regarding FIG. 10 The method 1000 described or any aspect thereof.

[0158] More generally, components used for conveying, sending, transmitting, or outputting for transmission may include FIG. 3 The transceiver 354, antenna 352, transmit processor 364, TX MIMO processor 366, and / or controller / processor 380 of the UE104 illustrated herein are shown in the diagram. FIG. 11 The transceiver 1145 and / or antenna 1150 of the communication device 1100 in the middle FIG. 11 One or more processors 1110 of the communication device 1100. Components for transmitting, receiving, or acquiring may include... FIG. 3 The transceiver 354, antenna 352, receiver processor 358, and / or controller / processor 380 of the UE 104 illustrated herein are shown in the diagram. FIG. 11 The transceiver 1145 and / or antenna 1150 of the communication device 1100 in the middle FIG. 11 One or more processors 1110 of the communication device 1100 in the middle.

[0159] FIG. 12 Various aspects of the example communication device 1200 are described. In some aspects, the communication device 1200 is user equipment, such as those described above. FIG. 1 and FIG. 3 The UE 104 described.

[0160] Communication device 1200 includes a processing system 1205 coupled to a transceiver 1245 (e.g., a transmitter and / or receiver). The transceiver 1245 is configured to transmit and receive signals for communication device 1200 via antenna 1250, such as the various signals described herein. The processing system 1205 may be configured to perform processing functions of communication device 1200, including processing signals received by and / or to be transmitted by communication device 1200.

[0161] Processing system 1205 includes one or more processors 1210. In various aspects, the one or more processors 1210 can represent, as per [reference to...] FIG. 3The described receiver processor 358, transmitter processor 364, TX MIMO processor 366, and / or controller / processor 380 are one or more of these. One or more processors 1210 are coupled to a computer-readable medium / memory 1225 via a bus 1240. In some aspects, the computer-readable medium / memory 1225 is configured to store instructions (e.g., computer-executable code) that, when executed by one or more processors 1210, enable one or more processors 1210 to execute and cause the one or more processors to perform actions related to... FIG. 9 The described method 900 or any aspect thereof, including regarding FIG. 9 Any additional steps or sub-steps described; and regarding FIG. 10 The described method 1000 or any aspect thereof, including regarding FIG. 10 Any additional steps or sub-steps described. Note that references to processors performing the functions of communication device 1200 may include one or more processors, such as performing the functions of communication device 1200 in a distributed manner.

[0162] In the depicted example, computer-readable medium / memory 1225 stores code 1230 for receiving and code 1235 for combining. Processing the code 1230 for receiving and the code 1235 for combining enables the communication device 1200 to perform and cause the communication device to perform actions related to... FIG. 9 The described method 900 or any aspect thereof; and regarding FIG. 10 The method 1000 described or any aspect thereof.

[0163] One or more processors 1210 include circuitry configured to implement (e.g., execute) code stored in a computer-readable medium / memory 1225, including circuitry 1215 for receiving and circuitry 1220 for combining. Processing using the circuitry 1215 for receiving and the circuitry 1220 for combining enables the communication device 1200 to perform and allow the communication device to perform actions related to... FIG. 9 The described method 900 or any aspect thereof; and regarding FIG. 10 The method 1000 described or any aspect thereof.

[0164] More generally, components used for conveying, sending, transmitting, or outputting for transmission may include FIG. 3 The transceiver 354, antenna 352, transmit processor 364, TX MIMO processor 366, and / or controller / processor 380 of the UE104 illustrated herein are shown in the diagram. FIG. 12 The transceiver 1245 and / or antenna 1250 of the communication device 1200 in the middle FIG. 12One or more processors 1210 of the communication device 1200. Components for transmitting, receiving, or acquiring may include... FIG. 3 The transceiver 354, antenna 352, receiver processor 358, and / or controller / processor 380 of the UE 104 illustrated herein are shown in the diagram. FIG. 12 The transceiver 1245 and / or antenna 1250 of the communication device 1200 in the middle FIG. 12 One or more processors 1210 of the communication device 1200.

[0165] Example Clauses

[0166] Specific implementation examples are described in the following numbered clauses: Clause 1: A method for wireless communication by a device, the method comprising: receiving an indication of a reference number of times an S-SSB is transmitted in an SL-BWP; and transmitting a first S-SSB in each of a plurality of RB sets using a first transmit power, wherein the first transmit power is based on the reference number of times the S-SSB is transmitted.

[0167] Clause 2: The method according to Clause 1, wherein receiving the indication of the reference number of transmissions of S-SSB further includes receiving the indication of the reference number of transmissions of S-SSB via RRC signaling.

[0168] Clause 3: The method according to any one of Clauses 1 to 2, wherein the first transmission power based on the reference number of S-SSB transmissions comprises: the maximum transmission power per RB set based on the reference number of S-SSB transmissions; and the first transmission power based on the maximum transmission power per RB set and one or more S-SSB power control parameters.

[0169] Clause 4: The method according to any one of Clauses 1 to 3, wherein the number of the plurality of RB sets is based on the number of RB sets on which the device is to maintain COT.

[0170] Clause 5: The method according to Clause 4, wherein the number of RB sets on which the device intends to maintain COT is less than the reference number of S-SSB transmissions, and the number of the plurality of RB sets is equal to the number of RB sets on which the device intends to maintain COT.

[0171] Clause 6: The method according to Clause 4, wherein the number of the plurality of RB sets is equal to the number of RB sets on which the device intends to maintain COT: the number of RB sets on which the device intends to maintain COT is greater than or equal to the reference number of times the S-SSB is transmitted; and the total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is less than or equal to the maximum total transmission power of the device.

[0172] Clause 7: The method according to Clause 4, wherein the number of the plurality of RB sets is less than the number of RB sets on which the device intends to maintain COT: the number of RB sets on which the device intends to maintain COT is greater than or equal to the reference number of times the S-SSB is transmitted; and the total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is greater than the maximum total transmission power of the device.

[0173] Clause 8: The method according to Clause 7, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being randomly selected from the RB sets on which the device is to maintain COT.

[0174] Clause 9: The method according to Clause 7, wherein the plurality of RB sets are RB sets that are frequency-continuous in the RB set on which the device is to maintain COT, and wherein the plurality of RB sets includes the anchor RB set of the SL-BWP.

[0175] Clause 10: The method according to Clause 7, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being selected from the RB sets on which the device wants to maintain COT based on a priority value associated with a PSSCH transmission scheduled on the RB sets on which the device wants to maintain COT.

[0176] Clause 11: A method for wireless communication by a device, the method comprising: receiving a PSBCH including a DMRS in an anchor RB set of an SL-BWP comprising a plurality of RB sets, the DMRS carrying one or more bits identifying one or more RB sets among the plurality of RB sets as including a first S-SSB; and receiving the first S-SSB in each of the one or more RB sets.

[0177] Clause 12: The method according to Clause 11, wherein the one or more bits indicate the number of RB sets to be included in the plurality of RB sets at a first frequency in the plurality of RB sets, and wherein the one or more RB sets are consecutive RB sets at frequencies in the plurality of RB sets.

[0178] Clause 13: The method described in Clause 12, wherein one or more bits are resource indicator values.

[0179] Clause 14: The method according to Clause 11, wherein the number of said one or more bits is one less than the number of said plurality of RB sets, and wherein each of said one or more bits is mapped to a different RB set in said plurality of RB sets other than the anchor RB set.

[0180] Clause 15: The method according to Clause 11, wherein the number of the one or more bits is equal to the number of the plurality of RB sets, and wherein each of the one or more bits is mapped to a different RB set among the plurality of RB sets.

[0181] Clause 16: The method according to any one of Clauses 11 to 15, the method further comprising: combining the first S-SSB received in each of the one or more RB sets to decode the first S-SSB.

[0182] Clause 17: One or more means comprising: one or more memories including executable instructions; and one or more processors configured to execute the executable instructions and cause the one or more means to perform the method according to any one of Clauses 1 to 16.

[0183] Clause 18: One or more apparatuses, said one or more apparatuses comprising components for performing the method according to any one of Clauses 1 to 16.

[0184] Clause 19: One or more non-transitory computer-readable media, the one or more non-transitory computer-readable media comprising executable instructions that, when executed by one or more processors of one or more devices, cause the one or more devices to perform the method according to any one of Clauses 1 to 16.

[0185] Clause 20: One or more computer program products embodied on one or more computer-readable storage media, the one or more computer-readable storage media including code for performing the method according to any one of Clauses 1 to 16.

[0186] Additional Notes

[0187] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein do not limit the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, the function and arrangement of the elements discussed may be changed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in various examples. For example, the described methods may be performed in a different order than described, and various actions may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Moreover, the scope of this disclosure is intended to cover such apparatuses or methods practiced using other structures, functionalities, or structures and functionalities that complement or replace the various aspects of this disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of these claims.

[0188] The various exemplary logic blocks, modules, and circuits described in this disclosure can be implemented or executed using a general-purpose processor, digital signal processor (DSP), ASIC, field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic device, discrete hardware component, or any combination thereof designed to perform the functions described herein. While the general-purpose processor may be a microprocessor, in alternative embodiments, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, a system-on-a-chip (SoC), or any other such configuration.

[0189] As used in this article, the phrase “at least one of” in a list of items refers to any combination of these entries, including a single member. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0190] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" can include calculation, operation, processing, deduction, investigation, lookup (e.g., searching in a table, database, or other data structure), assertion, and so on. Additionally, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and so on. Furthermore, "determine" can include parsing, selecting, picking, building, and so on.

[0191] As used herein, unless otherwise stated, “coupled to” and “coupled with” generally encompass both direct and indirect coupling (e.g., including intermediate aspects of coupling). For example, stating that a processor is coupled to memory allows for direct coupling or coupling via an intermediate aspect such as a bus.

[0192] The methods disclosed herein include one or more actions for implementing the methods. These actions may be interchanged without departing from the scope of the claims. In other words, unless a specific order of actions is specified, the order and / or use of specific actions may be modified without departing from the scope of the claims. Furthermore, the various operations of the methods described above may be performed by any suitable component capable of performing the corresponding function. This component may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors.

[0193] The following claims are not intended to be limited to the aspects shown herein, but should be given the full scope consistent with the language of the claims. References to elements in the singular form are not intended to mean “only one” (unless specifically stated otherwise), but rather “one or more”. For example, unless specifically stated otherwise, references to elements (e.g., “processor,” “controller,” “memory,” etc.) should be understood to mean one or more elements (e.g., “one or more processors,” “one or more controllers,” “one or more memories,” etc.). The terms “set” and “group” are intended to include one or more elements and may be used interchangeably with “one or more.” In the case of references to one or more elements performing a function (e.g., steps of a method), one element may perform all the functions, or more than one element may perform these functions collectively. When more than one element performs these functions collectively, each function does not need to be performed by every single element (e.g., different functions may be performed by different elements), and / or each function does not need to be performed by only one element overall (e.g., different elements may perform different sub-functions of a function). Similarly, when referring to one or more elements configured to cause another element (e.g., a device) to perform a function, one element may be configured to cause the other element to perform all functions, or more than one element may be collectively configured to cause the other element to perform those functions. Unless otherwise specifically stated, the term "some" refers to one or more. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are currently or hereafter known to those skilled in the art are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is explicitly stated in the claims.

Claims

1. An apparatus configured for wireless communication, the apparatus comprising: One or more memories, the one or more memories including processor-executable instructions; and one or more processors, said one or more processors being configured to execute processor-executable instructions and cause the device to: Receive an indication of the reference number of times the sidelink synchronization signal block (S-SSB) is transmitted in the sidelink bandwidth portion (SL-BWP); and In each of a plurality of resource block (RB) sets, a first S-SSB is transmitted using a first transmit power, wherein the first transmit power is based on the reference number of times the S-SSB is transmitted.

2. The apparatus of claim 1, wherein, in order to receive the indication of the reference number of S-SSB transmissions, the one or more processors are configured to execute processor-executable instructions and cause the apparatus to: The indication of the reference number of times the S-SSB is transmitted is received via Radio Resource Control (RRC) signaling.

3. The apparatus of claim 1, wherein the first transmission power based on the reference number of S-SSB transmissions comprises: The maximum transmission power per RB set is based on the reference number of times the S-SSB is transmitted; as well as The first transmit power is based on the maximum transmit power per RB set and one or more S-SSB power control parameters.

4. The apparatus of claim 1, wherein the number of the plurality of RB sets is based on the number of RB sets on which the apparatus intends to maintain Channel Occupancy Time (COT).

5. The apparatus of claim 4, wherein the number of RB sets on which the apparatus intends to maintain COT is less than the reference number of S-SSB transmissions, and the number of the plurality of RB sets is equal to the number of RB sets on which the apparatus intends to maintain COT.

6. The apparatus of claim 4, wherein the number of the plurality of RB sets is equal to the number of RB sets on which the apparatus intends to maintain a COT: The device must maintain on it the number of RB sets of COT greater than or equal to the reference number of S-SSB transmissions; and The total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is less than or equal to the maximum total transmission power of the device.

7. The apparatus of claim 4, wherein the number of the plurality of RB sets is less than the number of RB sets on which the apparatus intends to maintain a COT: The device must maintain on it the number of RB sets of COT greater than or equal to the reference number of S-SSB transmissions; and The total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is greater than the maximum total transmission power of the device.

8. The apparatus of claim 7, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being randomly selected from the RB sets on which the apparatus intends to maintain COT.

9. The apparatus of claim 7, wherein the plurality of RB sets are frequency-continuous RB sets in the RB set on which the apparatus is to maintain COT, and wherein the plurality of RB sets includes the anchor RB set of the SL-BWP.

10. The apparatus of claim 7, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being selected from the RB set on which the apparatus intends to maintain COT based on a priority value associated with a Physical Side Link Shared Channel (PSSCH) transmission scheduled on the RB set on which the apparatus intends to maintain COT.

11. An apparatus configured for wireless communication, the apparatus comprising: One or more memories, the one or more memories including processor-executable instructions; and one or more processors, said one or more processors being configured to execute processor-executable instructions and cause the device to: A physical sidelink broadcast channel (PSBCH) including a demodulation reference signal (DMRS) is received in an anchor RB set comprising a sidelink bandwidth portion (SL-BWP) of multiple resource blocks (RBs), the DMRS carrying one or more bits that identify one or more RB sets among the multiple RB sets as including a first sidelink synchronization signal block (S-SSB). as well as The first S-SSB is received in each of the one or more RB sets.

12. The apparatus of claim 11, wherein the one or more bits indicate the number of RB sets to be included in the plurality of RB sets at a first frequency in the one or more RB sets and the number of the one or more RB sets, wherein the one or more RB sets are frequency-sequential RB sets in the plurality of RB sets.

13. The apparatus of claim 12, wherein one or more bits are resource indicator values.

14. The apparatus of claim 11, wherein the number of the one or more bits is one less than the number of the plurality of RB sets, and wherein each of the one or more bits maps to a different RB set in the plurality of RB sets other than the anchor RB set.

15. The apparatus of claim 11, wherein the number of the one or more bits is equal to the number of the plurality of RB sets, and wherein each of the one or more bits maps to a different RB set among the plurality of RB sets.

16. The apparatus of claim 11, wherein the one or more processors are configured to execute processor-executable instructions and cause the apparatus to: The first S-SSB received in each of the one or more RB sets is combined to decode the first S-SSB.

17. A method for wireless communication by a device, the method comprising: Receive an indication of the reference number of times the side link synchronization signal block (S-SSB) is transmitted in the side link bandwidth portion (SL-BWP); as well as In each of a plurality of resource block (RB) sets, a first S-SSB is transmitted using a first transmit power, wherein the first transmit power is based on the reference number of times the S-SSB is transmitted.

18. The method of claim 17, wherein receiving the indication of the reference number of S-SSB transmissions further comprises: The indication of the reference number of times the S-SSB is transmitted is received via Radio Resource Control (RRC) signaling.

19. The method of claim 17, wherein the first transmission power based on the reference number of S-SSB transmissions comprises: The maximum transmission power per RB set is based on the reference number of times the S-SSB is transmitted; as well as The first transmit power is based on the maximum transmit power per RB set and one or more S-SSB power control parameters.

20. The method of claim 17, wherein the number of the plurality of RB sets is based on the number of RB sets on which the device intends to maintain Channel Occupancy Time (COT).

21. The method of claim 20, wherein the number of RB sets on which the device intends to maintain COT is less than the reference number of S-SSB transmissions, and the number of the plurality of RB sets is equal to the number of RB sets on which the device intends to maintain COT.

22. The method of claim 20, wherein the number of the plurality of RB sets is equal to the number of RB sets on which the device intends to maintain a COT: The device must maintain on it the number of RB sets of COT greater than or equal to the reference number of S-SSB transmissions; and The total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is less than or equal to the maximum total transmission power of the device.

23. The method of claim 20, wherein the number of the plurality of RB sets is less than the number of RB sets on which the device intends to maintain a COT: The device must maintain on it the number of RB sets of COT greater than or equal to the reference number of S-SSB transmissions; and The total transmission power of transmitting the first S-SSB in each of the plurality of RB sets using the first transmission power is greater than the maximum total transmission power of the device.

24. The method of claim 23, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being randomly selected from the RB sets on which the device is to maintain COT.

25. The method of claim 23, wherein the plurality of RB sets are frequency-continuous RB sets in the RB set on which the device is to maintain COT, and wherein the plurality of RB sets includes the anchor RB set of the SL-BWP.

26. The method of claim 23, wherein the plurality of RB sets includes the anchor RB set of the SL-BWP and one or more RB sets, the one or more RB sets being selected from the RB set on which the device intends to maintain COT based on a priority value associated with a Physical Side Link Shared Channel (PSSCH) transmission scheduled on the RB set on which the device intends to maintain COT.

27. A method for wireless communication by a device, the method comprising: A physical sidelink broadcast channel (PSBCH) including a demodulation reference signal (DMRS) is received in an anchor RB set comprising a sidelink bandwidth portion (SL-BWP) of multiple resource blocks (RBs), the DMRS carrying one or more bits that identify one or more RB sets among the multiple RB sets as including a first sidelink synchronization signal block (S-SSB). as well as The first S-SSB is received in each of the one or more RB sets.

28. The method of claim 27, wherein the one or more bits indicate the number of RB sets to be included in the plurality of RB sets at a first frequency in the one or more RB sets and the number of the one or more RB sets, wherein the one or more RB sets are frequency-sequential RB sets in the plurality of RB sets.

29. The method of claim 28, wherein the one or more bits are resource indicator values.

30. The method of claim 27, wherein the number of the one or more bits is one less than the number of the plurality of RB sets, and wherein each of the one or more bits maps to a different RB set in the plurality of RB sets other than the anchor RB set.

Images