Cross-carrier scheduled sidelink carrier aggregation

Abstract

The present disclosure relates to cross-carrier scheduling for sidelink carrier aggregation, and includes methods and apparatuses for determining a component carrier (CC) index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which the at least one of the first sidelink transmission and the Uu transmission occurs, and performing at least one of the following based on the CC index: transmitting the first sidelink transmission to the second UE, and transmitting the Uu transmission to the network entity.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 066,007, filed on August 14, 2020, and entitled “SIDELINK CARRIER AGGREGATION CROSS CARRIER SCHEDULING,” and U.S. Patent Application No. 17 / 401,126, filed on August 12, 2021, and entitled “SIDELINK CARRIER AGGREGATION CROSS CARRIER SCHEDULING,” which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference. Technical Field

[0003] The present disclosure generally relates to communication systems, and more particularly, to cross-carrier scheduling for sidelink carrier aggregation. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution released by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., in conjunction with the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ them.

[0006] Some wireless communication networks include device-to-device (D2D) communications, such as, but not limited to, vehicle-based communication devices, which can communicate and / or communicate with other devices according to: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) (e.g., from a vehicle-based communication device to a road infrastructure node), vehicle-to-network (V2N) (e.g., from a vehicle-based communication device to one or more network nodes such as a base station), and combinations thereof, which may be collectively referred to as vehicle-to-everything (V2X) communications. Further improvements in multiple access and D2D technologies are desirable. Summary of the Invention

[0007] The following provides a brief summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be presented later.

[0008] According to one example, a method for performing wireless communication at a first user equipment (UE) includes: determining a component carrier (CC) index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which the first sidelink transmission and at least one of the Uu transmission occur; and performing at least one of the following operations based on the CC index: transmitting the first sidelink transmission to the second UE, and transmitting the Uu transmission to the network entity.

[0009] In a further example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute the instructions to: determine a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and based on the CC index, perform at least one of the following operations: transmit the first sidelink transmission to the second UE and transmit the Uu transmission to the network entity.

[0010] In another aspect, an apparatus for wireless communication is provided, comprising: a unit for determining a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which the first sidelink transmission and at least one of the Uu transmission occur; and a unit for performing at least one of the following operations based on the CC index: transmitting the first sidelink transmission to the second UE, and transmitting the Uu transmission to the network entity.

[0011] In another aspect, a non-transitory computer-readable medium is provided, comprising code executable by one or more processors to perform the following operations: determining a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and performing at least one of the following operations based on the CC index: transmitting the first sidelink transmission to the second UE, and transmitting the Uu transmission to the network entity.

[0012] According to another example, a method for wireless communication at a network entity includes: sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication including one or more carrier indicator fields (CIFs), the one or more CIFs being configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with the network entity, the CC index indicating one or more CCs in which the first sidelink transmission and at least one of the Uu transmission occur; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0013] In a further example, an apparatus for wireless communication is provided, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute the instructions to perform the following operations: sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication comprising one or more CIFs, the one or more CIFs configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0014] In another aspect, an apparatus for wireless communication is provided, comprising: a unit for sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication comprising one or more CIFs, the one or more CIFs being configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0015] In another aspect, a non-transitory computer-readable medium is provided, comprising code executable by one or more processors to perform the following operations: sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication comprising one or more CIFs, the one or more CIFs configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0016] To accomplish the foregoing and related objectives, one or more aspects include the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a diagram of an example of a wireless communication system and access network according to one or more aspects of the present disclosure.

[0018] Figure 2A 、 2B , 2C and 2D are respectively provided in accordance with one or more aspects of the present disclosure Figure 1 Schematic diagram of an example of a first 5G / NR frame, DL channels within a 5G / NR subframe, a second 5G / NR frame, and UL channels within a 5G / NR subframe used in communication between two communication nodes in a system.

[0019] Figure 3 According to one or more aspects of the present disclosure, Figure 1 Schematic diagram of an example frame structure and resources for sidelink communication between two of the communication nodes in a system.

[0020] Figure 4 According to one or more aspects of the present disclosure Figure 1 Schematic diagram of an example of hardware components of two communication nodes in a communication node system.

[0021] Figure 5 is a diagram illustrating an example of cross-carrier scheduling for a base station, a sidelink transmitting UE, and a sidelink receiving UE.

[0022] Figure 6 According to one or more aspects of the present disclosure, Figure 1 Flowchart of an example method of wireless communication for a first UE operating in a system.

[0023] Figure 7 According to one or more aspects of the present disclosure, Figure 1 Flowchart of another example method of wireless communication for a network entity operating in a system.

[0024] Figure 8 is a block diagram of an example UE in accordance with various aspects of the present disclosure.

[0025] Figure 9 is a block diagram of an example base station in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0026] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. For the purpose of providing a comprehensive understanding of the various concepts, the detailed description includes specific details. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0027] In summary, the present disclosure relates to sidelink communications, which include a user equipment (UE) transmitting from a base station to a remote UE on a sidelink, or transmitting from a remote UE to a base station via the UE. The sidelink may include a physical sidelink shared channel (PSSCH) and a physical sidelink control channel (PSCCH). The PSSCH may carry sidelink data between a first UE and a second UE. Sidelink transmissions may be defined as a one-to-many scheme, which means that data may be received by multiple UEs belonging to a group. The PSCCH may carry sidelink control information (SCI), which may include information about resource allocations for the PSSCH.

[0028] In particular, the present disclosure relates to enhancements to sidelink communications, and in particular to sidelink carrier aggregation and multi-component carrier (CC) granting. In a device-to-device (D2D) communication system operating in accordance with a new radio (NR) scheme (which may include a UE communicating with both a network entity and a second UE), carrier aggregation may be implemented on a sidelink between a UE and a second UE. That is, carriers forming a PSSCH and / or PSCCH may be aggregated to increase the overall transmission bandwidth and, therefore, the data rate achievable on the above-mentioned communication channels (e.g., PSSCH and PSCCH). Each aggregated carrier may correspond to a CC. Furthermore, each CC may have a certain bandwidth and may not exceed a maximum number of aggregated carriers. Although carrier aggregation may be useful in high data rate applications in a D2D communication system, the implementation of carrier aggregation may result in increased complexity.

[0029] Therefore, the present disclosure reduces implementation complexity and potential negative impact on UEs by enhancing sidelink carrier aggregation for high data rate applications (such as for NCIS or V2X). Specifically, the present disclosure relates to enhancements to cross-carrier scheduling for sidelink carrier aggregation.

[0030] In one aspect, the present disclosure provides an apparatus and method for performing the following operations: determining a component carrier (CC) index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which the first sidelink transmission and at least one of the Uu transmission occur; and performing at least one of the following operations based on the CC index: transmitting the first sidelink transmission to the second UE, and transmitting the Uu transmission to the network entity.

[0031] In one aspect, the present disclosure provides an apparatus and method for performing the following operations: sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication including one or more carrier indicator fields (CIFs), the one or more CIFs being configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving a Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0032] The following is about Figure 1-9 These and other features of the present disclosure are discussed in detail.

[0033] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the detailed description below and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0034] By way of example, an element, or any part of an element, or any combination of elements, can be implemented as a "processing system" comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, system-on-chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software can be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes, functions, etc.

[0035] Accordingly, in one or more example embodiments, the functions described can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media can be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the aforementioned types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0036] Figure 1 is a schematic diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)).

[0037] In certain aspects, UE 104b may include a communication component 121 for facilitating sidelink communications between base station 102a and UE 104a. UE 104a may have a first access link 120a directly with base station 102a and a second communication link with base station 102b via a sidelink 158a with UE 104b, with UE 104b having the second access link 120b to base station 102a. The communication component 121 of UE 104b may include a sidelink component 123 that may be selectively configured for cross-carrier scheduling of sidelink carrier aggregation.

[0038] Accordingly, UE 104a may be configured to manage communications with both UE 104b via sidelink 158a and base station 102a via access link 120a.

[0039] Similarly, base station 102a may include a base station communication component 127 configured to manage communications with both UE 104b via access link 120b and UE 104a via access link 120a.

[0040] Further details of these operations performed by UE 104b, UE 104a, and base station 102a are discussed in detail below.

[0041] Base stations 102 (including base station 102a) may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femto cells, pico cells, and micro cells.

[0042] Base stations 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the 5G core network 190 via a backhaul link 184. Among other functions, the base stations 102 can perform one or more of the following: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 may communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) over backhaul links 134 (eg, an X2 interface). Backhaul links 134 may be wired or wireless.

[0043] Base station 102 can wirelessly communicate with UE 104 (including UE 104b and UE 104a). Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a home evolved Node B (eNB) (HeNB), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 (including access links 120a and 120b) can include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. The base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction. 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 for DL ​​than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0044] Certain UEs 104 (such as UE 104b and UE 104a) may communicate with each other using device-to-device (D2D) communication links 158 (one example of which includes sidelink 158a). The D2D communication links 158 may use DL / UL WWAN spectrum. The D2D communication links 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be via a variety of wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0045] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0046] The small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum can improve coverage and / or increase capacity of the access network.

[0047] Base station 102 (whether a small cell 102′ or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, in millimeter wave (mmW) frequencies, and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near-mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is a portion of the RF spectrum in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and has a wavelength between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3 GHz, which have a wavelength of 100 mm. Super high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communications using the mmW / near-mmW radio frequency bands (e.g., 3 GHz-300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0048] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 180 / UE 104 may perform beam training to determine optimal receive and transmit directions for each of base station 180 / UE 104. The transmit direction and receive direction for base station 180 may be the same or different. The transmit direction and receive direction for UE 104 may be the same or different.

[0049] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transferred through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides IP address allocation and other functions to UEs. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 can provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as the entry point for content provider MBMS transmissions, can be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and can be used to schedule MBMS transmissions. The MBMS gateway 168 can be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and can be responsible for session management (start / stop) and for collecting billing information related to eMBMS.

[0050] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management unit (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transported through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0051] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver, a wireless base station, a wireless transceiver, a transceiver functional unit, a basic service set (BSS), an extended service set (ESS), a transmit / receive point (TRP), or some other appropriate terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, an oven, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a user agent, a mobile client, a client, or some other appropriate terminology.

[0052] Figures 2A-2D Included is a diagram illustrating example frame structures and resources that may be utilized in communications between base station 102 and UE 104 as described in this disclosure. Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram showing an example of DL channels within a 5G / NR subframe. Figure 2C Figure 250 shows an example of a second subframe within a 5G / NR frame structure. Figure 2D 280 is a diagram illustrating an example of UL channels within a 5G / NR subframe. The 5G / NR frame structure may be FDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or the 5G NR frame structure may be TDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A 、 2CIn the example provided, it is assumed that the 5G / NR frame structure is TDD, where subframe 4 is configured with time slot format 28 (primarily DL), where D is DL, U is UL, and X is flexibly used between DL / UL, and subframe 3 is configured with time slot format 34 (primarily UL). Although subframes 3 and 4 are shown as having time slot formats 34 and 28, respectively, any particular subframe can be configured with any of the various available time slot formats 0-61. Time slot formats 0 and 1 are full DL and UL, respectively. Other time slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the time slot format (dynamically configured through DL control information (DCI) or semi-statically / statically configured through radio resource control (RRC) signaling) via the received time slot format indicator (SFI). It should be noted that the description below also applies to the 5G NR frame structure as TDD.

[0053] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the time slot configuration and numerology. For slot configuration 0, different digital schemes μ0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different digital schemes 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Therefore, for slot configuration 0 and digital scheme μ, there are 14 symbols / slot and 2 μ time slots / subframes. The subcarrier spacing and symbol length / duration are functions of the digital scheme. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is a digital scheme 0 to 5. As such, digital scheme μ=0 has a subcarrier spacing of 15kHz, and digital scheme μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A-2DAn example is provided for slot configuration 0 with 14 symbols per slot and a digital scheme μ = 0 with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is approximately 66.67 μs.

[0054] The resource grid can be used to represent the frame structure. Each time slot can include a resource block (RB) (also known as a physical RB (PRB)), which extends 12 consecutive subcarriers. The resource grid can be divided into multiple resource elements (REs). The number of bits carried by each RE can depend on the modulation scheme.

[0055] As in Figure 2A As shown in , some of the REs carry reference (pilot) signals (RS) for the UE. In some configurations, the RS may include a demodulation RS (DM-RS) for channel estimation at the UE (indicated as R for a particular configuration). x , where 100x is the port number, but other DM-RS configurations are possible) and / or channel state information reference signal (CSI-RS). The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0056] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI in one or more control channel elements (CCEs), each CCE includes nine RE groups (REGs), and each REG includes four consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) can be within symbol 2 of a specific subframe of the frame. The PSS is used by the UE 104 to determine the subframe / symbol timing and the physical layer identification. The secondary synchronization signal (SSS) can be within symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the physical layer cell identification group number and the radio frame timing. Based on the physical layer identification and the physical layer cell identification group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the position of the aforementioned DM-RS. 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 number of RBs in the system bandwidth and the system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not sent through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0057] like Figure 2CAs shown, some of the REs carry DM-RSs for channel estimation at the base station (which are indicated as Rs for a specific configuration, but other DMRS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation in order to enable frequency-dependent scheduling on the UL.

[0058] Figure 2D Examples of various UL channels within a subframe of a frame are shown. The PUCCH may be positioned as indicated in a configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding 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 (BSRs), power headroom reports (PHRs), and / or UCI.

[0059] Figure 3 300 is a diagram of an example of a time slot structure (e.g., for sidelink communications) that can be used within a 5G / NR frame structure. This is just one example, and other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include mini-slots that may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols.

[0060] A resource grid may be used to represent a frame structure. Each time slot may include a resource block (RB) (also referred to as a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid may be divided into a plurality of resource elements (REs). The number of bits carried by each RE may depend on the modulation scheme. Some of the REs may include control information (e.g., together with a demodulation RS (DMRS)). The control information may include sidelink control information (SCI). In some implementations, at least one symbol at the beginning of a time slot may be used by a transmitting device to perform a listen-before-talk (LBT) operation before transmitting. In some implementations, at least one symbol may be used for feedback, as described herein. In some implementations, another symbol, such as at the end of a time slot, may be used as a gap. The gap enables the device to switch from operating as a transmitting device to preparing to operate as a receiving device (e.g., in a subsequent time slot). As shown, data may be sent in the remaining REs. The data may include the data messages described herein. The location of any of the SCI, feedback, and LBT symbols may be different than in Figure 3 In some implementations, multiple time slots may be aggregated together, and Figure 3 The example aggregation of two time slots in should not be considered limiting, as the number of aggregated time slots may also be greater than two. When time slots are aggregated, the symbols used for feedback and / or the gap symbols may be different from the symbols used for a single time slot.

[0061] Figure 41 is a schematic diagram of hardware components of example transmit and / or receive (TX / RX) nodes 410 and 450, which can be any combination of base station 102-UE 104 communication and / or UE 104-UE 104 communication in system 100. For example, such communication can include, but is not limited to, communication such as a base station transmitting to a UE, a UE transmitting to a remote UE, a remote UE transmitting to a UE, or a UE transmitting to a base station in an access network. In one specific example, TX / RX node 410 can be an example implementation of base station 102, and TX / RX node 450 can be an example implementation of UE 104. In the DL, IP packets from EPC 160 can be provided to controller / processor 475. Controller / processor 475 implements Layer 4 and Layer 2 functionality. Layer 4 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Medium Access Control (MAC) layer. The controller / processor 475 provides: RRC layer functions associated with broadcasting system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), and MAC Demultiplexing of SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling and logical channel prioritization.

[0062] The transmit (TX) processor 416 and receive (RX) processor 470 implement layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection for the transport channel, forward error correction (FEC) encoding / decoding for the transport channel, interleaving, rate matching, mapping onto the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 416 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 474 may be used to determine the coding and modulation schemes and for spatial processing. Channel estimates may be derived from reference signals and / or channel condition feedback sent by the tx / rx node 450. Each spatial stream is then provided to a different antenna 420 via a separate transmitter 418TX. Each transmitter 418TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0063] At the TX / RX node 450, each receiver 454RX receives a signal via its corresponding antenna 452. Each receiver 454RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 456. The TX processor 468 and the RX processor 456 implement Layer 1 functions associated with various signal processing functions. The RX processor 456 can perform spatial processing on the information to recover any spatial streams destined for the TX / RX node 450. If multiple spatial streams are destined for the TX / RX node 450, the RX processor 456 can combine them into a single OFDM symbol stream. The RX processor 456 then uses a fast Fourier transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the most likely signal constellation point transmitted by the TX / RX node 410. These soft decisions can be based on the channel estimate calculated by the channel estimator 458. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the TX / RX node 410. The data and control signals are then provided to the controller / processor 459, which implements Layer 4 and Layer 2 functionality.

[0064] The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the UL, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 459 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0065] Similar to the functions described in conjunction with DL transmissions performed by the TX / RX node 410, the controller / processor 459 provides: RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0066] Channel estimates derived by a channel estimator 458 from a reference signal or feedback sent by the TX / RX node 410 may be used by a TX processor 468 to select an appropriate coding and modulation scheme, and to facilitate spatial processing. The spatial streams generated by the TX processor 468 may be provided to different antennas 452 via respective transmitters 454TX. Each transmitter 454TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0067] At TX / RX node 410, UL transmissions are processed in a manner similar to that described with respect to the receiver functionality at TX / RX node 450. Each receiver 418RX receives a signal through its respective antenna 420. Each receiver 418RX recovers information modulated onto an RF carrier and provides the information to an RX processor 470.

[0068] The controller / processor 475 may be associated with a memory 476 that stores program codes and data. The memory 476 may be referred to as a computer-readable medium. In the UL, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the tx / rx node 450. The IP packets from the controller / processor 475 may be provided to the EPC 160. The controller / processor 475 is also responsible for supporting HARQ operations using error detection using ACK and / or NACK protocols.

[0069] In one implementation, at least one of the TX processor 468, the RX processor 456, and the controller / processor 459 may be configured to perform operations related to Figure 1 Various aspects related to components 121, 125 and / or 127 in.

[0070] In one implementation, at least one of the TX processor 416, the RX processor 470, and the controller / processor 475 may be configured to perform operations related to Figure 1 Various aspects related to components 121, 125 and / or 127 in.

[0071] Figure 5 5 is a diagram illustrating an example of cross-carrier scheduling for a base station, a sidelink transmitting UE, and a sidelink receiving UE. For example, a network entity such as base station 102 may be configured to communicate with a sidelink transmitting UE (SLTx UE) such as UE 104b and a sidelink receiving UE (SL Rx UE) such as UE 104a.

[0072] In one aspect, one or more carrier indicator fields (CIFs) may be required in Mode 1. For example, a starting PDCCH sent by a base station in CC1 to at least one of an SLTx UE or an SLRx UE may carry all of one or more CIFs for the PSCCH (in CC2), PSSCH (in CC3), physical sidelink feedback channel (PSFCH) (in CC4), and PUCCH (in CC5). The starting PDCCH in CC1 schedules and reserves resources for the transmission of all of the PSCCH, PSSCH, PSFCH, and PUCCH. In some implementations, if, for example, an SLRx UE does not receive a PDCCH from the base station indicating scheduling for PSCCH / PSSCH, one or more of the CIFs may be carried in the PSCCH (e.g., Sidelink Control Information 1 (SCI1) or SCI2). In another implementation, one or more of the CIFs may be identified based on an indication based on an implicit rule (e.g., a rule indicating that the PSCCH and PSSCH are associated in the same CC). In another implementation, the PUCCH CC can be identified by identifying a PUCCH group. A PUCCH group is a group of CCs in which the PUCCH corresponding to any transmission in any CC in the group of CCs is sent in a designated CC associated with the PUCCH group. Only one PUCCHCC may be associated with each PUCCH group. A PUCCH group may be associated with a CC for at least one of PDCCH, PSCCH, PSSCH, or PSFCH. For example, a PUCCH group may consist of CC1 and CC2, and the CC in which the PUCCH is sent may be CC3, and if the PDCCH, PSCCH, PSSCH, or PSFCH is sent in CC1 or CC2, the PUCCH corresponding to the PDCCH / PSCCH / PSSCH / PSFCH is sent in CC3. CC3 may be the same as CC1 or CC2 or different from both CC1 and CC2. A PUCCH group may be identified by the CC that sends the PDCCH (e.g., with a mode 1 sidelink grant). In another example, instead of configuring a CC carrying a PDCCH, a CC carrying at least one of a PSCCH, a PSSCH, and a PSFCH may be configured.

[0073] In one aspect, a CC may be identified by identifying a PSFCH group. For example, a PSFCH group may correspond to a set of sidelink CCs, where for the set of sidelink CCs, the PSFCH is transmitted only in the CCs corresponding to the group. For example, a PSFCH group may consist of CC1 and CC2, and the CC in which the PSFCH is transmitted is CC3. If the PSCCH or PSSCH is transmitted in CC1 or CC2, the PSFCH corresponding to the PSCCH or PSSCH is transmitted in CC3. In some implementations, cross-CC PSCCH to PSSCH may be implemented only within a PSFCH group. That is, cross-CC scheduling may only occur among CCs in the same PSFCH group. In another implementation, the PSFCH group may be aligned with the PUCCH group (i.e., the PSFCH and PUCCH group are composed of the same CC), but the PSFCH and PUCCH may be transmitted on different CCs, i.e., in our previous example of PUCCH and PSFCH groups, CC3 used for the PUCCH group is different from CC2 used for the PSFCH group.

[0074] In some aspects, multiple grants may be included in a single PDCCH from a base station. In one case, each of the multiple grants may have a CIF that indicates the CC to which the grant applies. Thus, a PDCCH may include multiple CIFs. In another case, a PDCCH may include only one CIF, which may point to a group of CCs and be interpreted by a PDCCH-receiving UE as indicating that the first grant in the PDCCH will apply to the first CC within the group, the second grant will apply to the second CC, and so on.

[0075] refer to Figure 6 , the example method 600 of wireless communication may be performed by UE 104b, which may include Figure 1 、 4 or one or more components discussed in 8, and which may be configured for use as described above with respect to Figure 1-4 Cross-carrier scheduling of sidelink carrier aggregation is discussed.

[0076] At 602, method 600 includes determining a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. For example, in an aspect, UE 104b can operate one or any combination of antenna 865, RF front end 888, transceiver 802, processor 812, memory 816, modem 840, or communication component 121 in conjunction with sidelink component 123 to determine a CC index for at least one of a first sidelink transmission with a second UE 104a and a Uu transmission with the network entity 102, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. Thus, the UE 104b, antenna 865, RF front end 888, transceiver 802, processor 812, memory 816, modem 840, and communication component 121 may define a CC index for determining at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. For example, in one aspect, the UE 104b and / or sidelink component 123 may process signals to determine the CC index, and / or perform other signaling processes, such as described above with respect to Figure 8 described.

[0077] At 604, method 600 includes performing at least one of transmitting a first sidelink transmission to a second UE and transmitting a Uu transmission to a network entity based on the CC index. For example, in an aspect, UE 104b may operate one or any combination of antenna 865, RF front end 888, transceiver 802, processor 812, memory 816, modem 840, or communication component 121 in conjunction with sidelink component 123 to perform at least one of transmitting the first sidelink transmission to the second UE and transmitting the Uu transmission to the network entity based on the CC index. Thus, UE 104b, antenna 865, RF front end 888, transceiver 802, processor 812, memory 816, modem 840, and communication component 121 may define means for performing at least one of transmitting the first sidelink transmission to the second UE and transmitting the Uu transmission to the network entity based on the CC index. For example, in one aspect, UE 104b and / or sidelink component 123 can process the sidelink transmission into a signal and transmit the signal, and / or perform other signaling processes, such as described above with respect to Figure 8 described.

[0078] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to: receive a cross-carrier scheduling indication from a network entity, the cross-carrier scheduling indication comprising one or more carrier indicator fields (CIFs); and wherein determining a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with the network entity further comprises determining a CC index based on the cross-carrier scheduling indication.

[0079] In some implementations of method 600, the cross-carrier scheduling indication corresponds to a PDCCH transmission received on a first CC in a group of CCs.

[0080] In some implementations of the method 600, the one or more CIFs indicate a set of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the set of CCs.

[0081] In some implementations of method 600, one or more CIFs are included in at least one DCI indicating cross-carrier scheduling.

[0082] In some implementations of the method 600, the cross-carrier scheduling indication of the CC index is included in at least one of a Uu medium access control (MAC) control element (CE), a DCI, or a second sidelink transmission.

[0083] In some implementations of the method 600, the second sidelink transmission corresponds to at least one of a PSCCH, SCI1, SCI level-N (SCI-N), a physical sidelink shared channel (PSSCH), or a sidelink MAC CE.

[0084] In some implementations of method 600, the cross-carrier scheduling indication of the CC index is received by at least one of a first UE corresponding to a transmitter of one or more sidelink transmissions and a second UE corresponding to a receiver of one or more sidelink transmissions.

[0085] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to determine a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, further comprising determining the CC index based on an indication based on a preconfigured rule.

[0086] In some implementations of method 600, the indication based on a preconfigured rule identifies that the PSCCH and the PSSCH share a single CC from the set of CCs.

[0087] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to determine a PUCCH group based on a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity.

[0088] In some implementations of method 600, a PUCCH group is associated with a single CC in which the PUCCH is transmitted.

[0089] In some implementations of method 600, the determination of the PUCCH group is based on one or more CCs in which at least one of the PSCCH, PSSCH, and PSFCH is transmitted.

[0090] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to determine the PUCCH group further comprising determining the PUCCH group based on the CC in which the PDCCH transmission from the network entity occurs.

[0091] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to determine a PSFCH group based on a CC index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity.

[0092] In some implementations of method 600, a PSFCH group is associated with a set of sidelink CCs that includes a PSFCHCC in which a PSFCH transmission occurs.

[0093] In some implementations of method 600, the communication component 121 (such as in combination with the sidelink component 123), the transceiver 802, the processor 812, the memory 816, or the modem 840 is configured to: determine to schedule cross-CC transmissions for a first CC and a second CC, wherein the first CC is different from the second CC; determine that the first CC and the second CC are associated with a PSFCH group; and implement scheduling of cross-CC transmissions for the first CC and the second CC based on the determination that the first CC and the second CC are associated with the PSFCH group.

[0094] In some implementations of method 600, the first CC corresponds to a PSCCH transmission and the second CC corresponds to a PSSCH transmission.

[0095] In some implementations of the method 600, the first sidelink transmission corresponds to at least one of a PSCCH, a PSSCH, a PSFCH, a sidelink channel state information reference signal (SLCSI-RS), or a SL-CSI report.

[0096] In some implementations of method 600, the Uu transmission corresponds to at least one of: an ACK / NACK in response to receiving a sidelink acknowledgement (ACK) / negative acknowledgement (NACK) from a second UE, a report of sidelink channel state information / positioning state information (CSI / PSI) sent in response to receiving SL channel state information / positioning state information (CSI / PSI), or a measurement of a received SLCSI-RS / sidelink positioning reference signal (SLPRS).

[0097] refer to Figure 7 , the example method 700 of wireless communication may be performed by a network entity 102, which may include a Figure 1 、 4 or one or more components discussed in 9 and may be configured as described above with respect to Figure 1-4 Cross-carrier scheduling of sidelink carrier aggregation is discussed.

[0098] At 702, method 700 includes sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication including one or more CIFs configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. For example, in an aspect, the network entity 102 may operate one or any combination of the antenna 965, the RF front end 988, the transceiver 902, the processor 912, the memory 916, the modem 940, or the base station communication component 127 to send a cross-carrier scheduling indication to the first UE, the cross-carrier scheduling indication including one or more CIFs configured to determine a CC index for at least one of the first sidelink transmission between the first UE and the second UE and the Uu transmission with the network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. Thus, the network entity 102, antenna 965, RF front end 988, transceiver 902, processor 912, memory 916, modem 940, and base station communication component 127 can define means for sending a cross-carrier scheduling indication to a first UE, the cross-carrier scheduling indication comprising one or more CIFs configured to determine a CC index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with the network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs. For example, in one aspect, the network entity 102 and / or communication component 127 can process the cross-carrier scheduling indication into a signal and send the signal, and / or perform other signaling processes, as described above with respect to Figure 9 described.

[0099] At 704, method 700 includes receiving a Uu transmission from the first UE in response to sending a cross-carrier scheduling indication, wherein the Uu transmission occurs on one or more CCs. For example, in an aspect, the network entity 102 may operate one or any combination of the antenna 965, the RF front end 988, the transceiver 902, the processor 912, the memory 916, the modem 940, or the base station communication component 127 to receive a Uu transmission from the first UE in response to sending a cross-carrier scheduling indication, wherein the Uu transmission occurs on one or more CCs. Thus, the network entity 102, the antenna 965, the RF front end 988, the transceiver 902, the processor 912, the memory 916, the modem 940, and the base station communication component 127 may define a unit for receiving a Uu transmission from the first UE in response to sending a cross-carrier scheduling indication, wherein the Uu transmission occurs on one or more CCs. For example, in an aspect, the network entity 102 and / or the communication component 127 may receive a signal and process the signal into a Uu transmission, and / or perform other signal processing, as described above with respect to Figure 9 described.

[0100] In some implementations of method 700, the cross-carrier scheduling indication corresponds to a PDCCH transmission sent on a first CC in the set of CCs.

[0101] In some implementations of the method 700, the one or more CIFs indicate a set of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the set of CCs.

[0102] In some implementations of the method 700, one or more CIFs are included in at least one DCI indicating cross-carrier scheduling.

[0103] In some implementations of the method 700, the cross-carrier scheduling indication of the CC index is included in at least one of a Uu MAC CE, a DCI, or a second sidelink transmission.

[0104] In some implementations of the method 700, the second sidelink transmission corresponds to at least one of a PSCCH, SCI1, SCI-N, PSSCH, or a MAC CE.

[0105] In some implementations of the method 700, the cross-carrier scheduling indication of the CC index is received by at least one of a first UE corresponding to a transmitter of one or more sidelink transmissions and a second UE corresponding to a receiver of the one or more sidelink transmissions.

[0106] In some implementations of the method 700, the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity is according to an indication based on a preconfigured rule.

[0107] In some implementations of method 700, the indication based on a preconfigured rule identifies that the PSCCH and the PSSCH share a single CC from the set of CCs.

[0108] In some implementations of the method 700, the communication component 127 (such as in combination with the transceiver 902, the processor 912, the memory 916, or the modem 940) is configured to determine a PUCCH group based on a CC index for at least one of a first sidelink transmission with the second UE and a Uu transmission with the network entity.

[0109] In some implementations of the method 700, a PUCCH group is associated with a single CC in which the PUCCH is received.

[0110] In some implementations of the method 700, determining the PUCCH group is based on one or more CCs in which at least one of the PSCCH, PSSCH, and PSFCH is transmitted.

[0111] In some implementations of method 700, communication component 127 (such as in combination with transceiver 902, processor 912, memory 916, or modem 940) is configured to determine the PUCCH group further comprising determining the PUCCH group based on a CC in which a PDCCH transmission from a network entity occurs.

[0112] In some implementations of the method 700, the communication component 127 (such as in combination with the transceiver 902, the processor 912, the memory 916, or the modem 940) is configured to determine the PSFCH group based on a CC index for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity.

[0113] In some implementations of method 700, a PSFCH group is associated with a set of sidelink CCs that includes the PSFCHCC in which the PSFCH transmission occurs.

[0114] In some implementations of the method 700, the communication component 127 (such as in combination with the transceiver 902, the processor 912, the memory 916, or the modem 940) is configured to: determine to schedule cross-CC transmissions for a first CC and a second CC, wherein the first CC is different from the second CC; determine that the first CC and the second CC are associated with a PSFCH group; and based on the determination that the first CC and the second CC are associated with the PSFCH group, implement scheduling of cross-CC transmissions for the first CC and the second CC.

[0115] In some implementations of method 700, the first CC corresponds to a PSCCH transmission and the second CC corresponds to a PSSCH transmission.

[0116] In some implementations of the method 700, the first sidelink transmission corresponds to at least one of a PSCCH, a PSSCH, a PSFCH, an SLCSI-RS, or an SL-CSI report.

[0117] In some implementations of method 700, the Uu transmission corresponds to at least one of: an ACK / NACK in response to receiving a sidelink ACK / NACK from a second UE, a report of sidelink CSI / PSI sent in response to receiving SL CSI / PSI, or a measurement of a received SL CSI-RS / SL PRS.

[0118] refer to Figure 8 , one example of an implementation of UE 104 (including UE 104a and / or UE 104b) may include multiple components, some of which have been described above and are further described herein, including components such as: one or more processors 812 and memory 816 and a transceiver 802 that communicate via one or more buses 844, which may operate in conjunction with a modem 840 and / or a communication component 121 and a sidelink component 123 configured to perform cross-carrier scheduling for sidelink carrier aggregation.

[0119] In one aspect, the one or more processors 812 may include a modem 840 that utilizes one or more modem processors and / or may be part of the modem 840. Thus, various functions associated with the configuration component 198 may be included in the modem 840 and / or the processor 812 and, in one aspect, may be performed by a single processor, while in other aspects, different ones of the functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 812 may include any one or any combination of the following: a modem processor, a baseband processor, a digital signal processor, a transmit processor, a receiver processor, or a transceiver processor associated with the transceiver 802. In other aspects, some of the features of the one or more processors 812 and / or the modem 840 associated with the communication component 121 may be performed by the transceiver 802.

[0120] In addition, the memory 816 can be configured to store data used herein and / or local versions of the applications 875 executed by the at least one processor 812 or one or more of the communication components 842 and / or its subcomponents. The memory 816 can include any type of computer-readable medium usable by a computer or the at least one processor 812, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, the memory 816 can be a non-transitory computer-readable storage medium storing one or more computer-executable codes for defining one or more of the communication components 121 and / or its subcomponents and / or data associated therewith when the UE 104 operates the one or more processors 812 to execute the configuration component 198 and / or its subcomponents.

[0121] The transceiver 802 may include at least one receiver 806 and at least one transmitter 808. The receiver 806 may include hardware for receiving data and / or software executable by a processor, the code including instructions and stored in memory (e.g., a computer-readable medium). The receiver 806 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 806 may receive signals transmitted by at least one base station 102. In addition, the receiver 806 may process such received signals and may also obtain signal measurements such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. The transmitter 808 may include hardware for transmitting data and / or software executable by a processor, the code including instructions and stored in memory (e.g., a computer-readable medium). Suitable examples of the transmitter 808 may include, but are not limited to, an RF transmitter.

[0122] In addition, in one aspect, the UE 104 can include an RF front end 888 that can operate in communication with one or more antennas 865 and the transceiver 802 for receiving and sending radio transmissions, such as wireless communications sent by at least one base station 102 or wireless communications sent by the UE 104. The one or more antennas 865 can include one or more antenna panels and / or subarrays, such as can be used for beamforming. The RF front end 888 can be connected to the one or more antennas 865 and can include one or more low noise amplifiers (LNAs) 890, one or more switches 892, one or more power amplifiers (PAs) 898, and one or more filters 896 for sending and receiving RF signals.

[0123] In one aspect, the LNAs 890 can amplify the received signal at a desired output level. In one aspect, each LNA 890 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 888 can use one or more switches 892 to select a particular LNA 890 and its specified gain value based on the desired gain value for a particular application.

[0124] Furthermore, for example, the RF front end 888 can use one or more PAs 898 to amplify the signal for RF output at a desired output power level. In one aspect, each PA 898 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 888 can use one or more switches 892 to select a particular PA 898 and its specified gain value based on the desired gain value for a particular application.

[0125] In addition, for example, the RF front end 888 can use one or more filters 896 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, the output from the corresponding PA 898 can be filtered using a corresponding filter 896 to produce an output signal for transmission. In one aspect, each filter 896 can be connected to a specific LNA 890 and / or PA 898. In one aspect, the RF front end 888 can use one or more switches 892 to select a transmit path or a receive path using a specific filter 896, LNA 890, and / or PA 898 based on the configuration specified by the transceiver 802 and / or the processor 812.

[0126] Thus, the transceiver 802 can be configured to transmit and receive wireless signals via the RF front end 888 through one or more antennas 865. In an aspect, the transceiver can be tuned to operate at a specified frequency so that the UE 104 can communicate with, for example, one or more base stations 102 or one or more cells associated with one or more base stations 102. In an aspect, the modem 840 can configure the transceiver 802 to operate at a specified frequency and power level based on, for example, the UE configuration of the UE 104 and the communication protocol used by the modem 840.

[0127] In one aspect, the modem 840 can be a multi-band, multi-mode modem that can process digital data and communicate with the transceiver 802 so that the digital data is sent and received using the transceiver 802. In one aspect, the modem 840 can be multi-band and can be configured to support multiple frequency bands for a particular communication protocol. In one aspect, the modem 840 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 840 can control one or more components of the UE 104 (e.g., the RF front end 888, the transceiver 802) based on a specified modem configuration to enable transmission and / or reception of signals from the network. In one aspect, the modem configuration can be based on the modem mode and the frequency band in use. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104 (e.g., provided by the network during cell selection and / or cell reselection).

[0128] In one aspect, processor 812 may correspond to Figure 4 Similarly, the memory 816 may correspond to one or more processors in conjunction with the UE described in the embodiment of the present invention. Figure 4 The memory described by the UE in .

[0129] refer to Figure 9An example implementation of a base station 102 (e.g., base stations 102, 102a, and / or 102b as described above) may include various components, some of which are described above, in addition to including components such as: one or more processors 912 and memory 916 and a transceiver 902 in communication via one or more buses 944, which may operate in conjunction with a modem 940 and a base station communication component 127 configured to set up, activate, and deactivate sidelink carrier aggregation.

[0130] The transceiver 902, receiver 906, transmitter 908, one or more processors 912, memory 916, applications 975, bus 944, RF front end 988, LNA 990, switch 992, filter 996, PA 998 and one or more antennas 965 can be the same as or similar to the corresponding components of the UE 104 described above, but can be configured or otherwise programmed for base station operation as opposed to UE operation.

[0131] In one aspect, processor 912 may correspond to a processor that is associated with Figure 4 Similarly, the memory 916 may correspond to one or more processors in conjunction with the base station described in the embodiment of the present invention. Figure 4 The memory of the base station description in.

[0132] The following aspects and examples are merely illustrative, and these examples and aspects thereof may be combined with other embodiments or aspects of the teachings described herein without limitation.

[0133] In a first aspect, a method is performed by a first user equipment (UE). The method includes: determining a component carrier (CC) index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and performing at least one of the following operations based on the CC index: transmitting the first sidelink transmission to the second UE and transmitting the Uu transmission to the network entity.

[0134] In a second aspect, the method according to aspect 1 includes: receiving a cross-carrier scheduling indication from the network entity, the cross-carrier scheduling indication including one or more carrier indicator fields (CIFs); and wherein, determining the CC index for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity also includes: determining the CC index based on the cross-carrier scheduling indication.

[0135] In a third aspect, the method according to any one of aspects 1 and 2 includes the cross-carrier scheduling indication corresponding to a physical downlink control channel (PDCCH) transmission received on a first CC in a group of CCs.

[0136] In a fourth aspect, the method according to any one of aspects 1 and 2 includes: the one or more CIFs indicating a group of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the group of CCs.

[0137] In a fifth aspect, the method according to any one of aspects 1 and 2 includes: the one or more CIFs being included in at least one downlink control information (DCI) of the cross-carrier scheduling indication.

[0138] In a sixth aspect, the method according to any one of aspects 1 and 2 includes: the cross-carrier scheduling indication of the CC index is included in at least one of a Uu medium access control (MAC) control element (CE), downlink control information (DCI) or a second sidelink transmission.

[0139] In a seventh aspect, the method according to any one of aspects 1, 2 and 6 includes: the second sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), sidelink control information 1 (SCI1), an Nth level SCI (SCI-N), a physical sidelink shared channel (PSSCH) or a sidelink medium access control (MAC) control element (CE).

[0140] In an eighth aspect, the method according to any one of aspects 1 and 2 includes: the cross-carrier scheduling indication of the CC index is received by at least one of the first UE corresponding to the transmitter of one or more sidelink transmissions and the second UE corresponding to the receiver of the one or more sidelink transmissions.

[0141] In a ninth aspect, the method according to aspect 1 includes: determining the CC index for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity also includes: determining the CC index according to an indication based on a preconfigured rule.

[0142] In a tenth aspect, the method according to aspect 1 includes determining a physical uplink control channel (PUCCH) group based on the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity.

[0143] In an eleventh aspect, the method according to any one of aspects 1 and 10 includes: the PUCCH group being associated with a single CC in which the PUCCH is transmitted.

[0144] In a twelfth aspect, the method according to aspect 1 includes determining a physical sidelink feedback channel (PSFCH) group based on the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity.

[0145] In a thirteenth aspect, the method according to aspect 1 includes: the first sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink feedback channel (PSFCH), a sidelink channel state information reference signal (SL CSI-RS) or a SL-CSI report.

[0146] In a fourteenth aspect, the method according to aspect 1 includes: the Uu transmission corresponds to at least one of the following: an ACK / NACK in response to receiving a sidelink acknowledgement (ACK) / negative acknowledgement (NACK) from the second UE, a report of the sidelink channel state information / positioning state information (CSI / PSI) sent in response to receiving the SL CSI / PSI, or a measurement of the received sidelink channel state information reference signal (SL CSI-RS) / sidelink positioning reference signal (SL PRS).

[0147] In a fifteenth aspect, a method is performed by a network entity. The method includes: sending a cross-carrier scheduling indication to a first user equipment (UE), the cross-carrier scheduling indication including one or more carrier indicator fields (CIFs), the one or more CIFs configured to determine a component carrier (CC) index for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with the network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0148] In a sixteenth aspect, the method of aspect 15 includes the cross-carrier scheduling indication corresponding to a physical downlink control channel (PDCCH) transmission sent on a first CC in a group of CCs.

[0149] In a seventeenth aspect, the method according to any one of aspects 15 and 16 includes: the one or more CIFs indicating a group of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the group of CCs.

[0150] In an eighteenth aspect, the method according to any one of aspects 15 and 16 includes: the one or more CIFs being included in at least one downlink control information (DCI) of the cross-carrier scheduling indication.

[0151] In a nineteenth aspect, the method according to any one of aspects 15 and 16 includes: the cross-carrier scheduling indication of the CC index is included in at least one of the following: a Uu medium access control (MAC) control element (CE), downlink control information (DCI) or a second sidelink transmission.

[0152] In an aspect 20, the method according to any one of aspects 15, 16 and 19 includes: the second sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), sidelink control information 1 (SCI1), an Nth level SCI (SCI-N), a physical sidelink shared channel (PSSCH) or a sidelink medium access control (MAC) control element (CE).

[0153] In aspect 21, the method according to any one of aspects 15 and 16 includes: the cross-carrier scheduling indication of the CC index is received by at least one of the first UE corresponding to the transmitter of one or more sidelink transmissions and the second UE corresponding to the receiver of the one or more sidelink transmissions.

[0154] In a twenty-second aspect, the method according to aspect 15 includes: the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity is according to an indication based on a pre-configured rule.

[0155] In a twenty-third aspect, the method according to aspect 15 includes determining a physical uplink control channel (PUCCH) group based on the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity.

[0156] In a twenty-fourth aspect, the method according to any one of aspects 15 and 23 comprises: the PUCCH group being associated with a single CC in which the PUCCH is received.

[0157] In a twenty-fifth aspect, the method according to aspect 15 includes determining a physical sidelink feedback channel (PSFCH) group based on the CC index used for at least one of the first sidelink transmission with the second UE and the Uu transmission with the network entity.

[0158] In aspect 26, the method according to any one of aspects 15 and 26 includes: determining to schedule cross-CC transmission for a first CC and a second CC, wherein the first CC is different from the second CC; determining that the first CC and the second CC are associated with the PSFCH group; and based on the determination that the first CC and the second CC are associated with the PSFCH group, implementing scheduling of the cross-CC transmission for the first CC and the second CC.

[0159] In aspect 27, the method according to aspect 15 includes: the first sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink feedback channel (PSFCH), a sidelink channel state information reference signal (SL CSI-RS) or a SL-CSI report.

[0160] In aspect 28, the method according to aspect 15 includes: the Uu transmission corresponds to at least one of the following: ACK / NACK in response to receiving a sidelink acknowledgement (ACK) / negative acknowledgement (NACK) from the second UE, a report of the sidelink channel state information / positioning state information (CSI / PSI) sent in response to receiving the SL CSI / PSI, or a measurement of the received sidelink channel state information reference signal (SL CSI-RS) / sidelink positioning reference signal (SL PRS).

[0161] In a twenty-ninth aspect, an apparatus for wireless communication at a first user equipment (UE) comprises: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute the instructions to: determine a component carrier (CC) index for at least one of a first sidelink transmission with a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and based on the CC index, perform at least one of the following operations: transmit the first sidelink transmission to the second UE and transmit the Uu transmission to the network entity.

[0162] In a thirtieth aspect, an apparatus for wireless communication at a network entity comprises: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute the instructions to perform the following operations: sending a cross-carrier scheduling indication to a first user equipment (UE), the cross-carrier scheduling indication comprising one or more carrier indicator fields (CIFs), the one or more CIFs configured to determine component carrier (CC) indices for at least one of a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the CC index indicating one or more CCs in which at least one of the first sidelink transmission and the Uu transmission occurs; and receiving the Uu transmission from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

[0163] A further example includes an apparatus for wireless communication, comprising: a memory configured to store instructions; and one or more processors communicatively coupled to the memory, wherein the one or more processors are configured to execute the instructions to perform the operations of one or more of the methods described herein.

[0164] Additional examples include a receiver node apparatus for wireless communications, comprising means for performing the operations of one or more of the methods described herein.

[0165] A further example includes a non-transitory computer-readable medium storing instructions, the instructions executable by one or more processors to perform the operations of one or more of the methods described herein.

[0166] It is to be understood that the specific order or hierarchy of blocks in the disclosed process / flowchart is illustrative of example methods. It is to be understood that the specific order or hierarchy of blocks in the disclosed process / flowchart may be rearranged based on design preferences. In addition, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in an example order and are not intended to be limited to the specific order or hierarchy presented.

[0167] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. For those skilled in the art, various modifications to these aspects will be apparent, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but to be given the full scope consistent with the text claims, wherein, unless explicitly stated otherwise, reference to an element in the singular is not intended to mean "one and only one", but rather "one or more". The word "exemplary" is used herein to mean "serving as an example, instance, or illustration". Any aspect described as "exemplary" in this article is not necessarily interpreted as preferred or advantageous over other aspects. Unless otherwise explicitly stated, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members or some members of A, B, or C. All structural and functional equivalents of the elements of various aspects described throughout this disclosure that are known or later become known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recited in the claims. The words "module," "mechanism," "element," "device," and the like are not substitutes for the word "unit." Therefore, no claim element is to be interpreted as a functional module unless the element is expressly recited using the phrase "unit for..."

Claims

1. A method for wireless communication at a first user equipment (UE), comprising: determining at least one component carrier (CC) index for a first sidelink transmission with a second UE and a Uu transmission with a network entity, the at least one CC index indicating one or more CCs in which the first sidelink transmission and the Uu transmission occur; as well as Transmitting the first sidelink transmission to the second UE and transmitting the Uu transmission to the network entity are performed based on the at least one CC index.

2. The method according to claim 1, further comprising: receiving a cross-carrier scheduling indication from the network entity, the cross-carrier scheduling indication comprising one or more carrier indicator fields (CIFs); and Determining at least one CC index for the first sidelink transmission with the second UE and the Uu transmission with the network entity further includes: determining the at least one CC index based on the cross-carrier scheduling indication.

3. The method according to claim 2, wherein: The cross-carrier scheduling indication corresponds to a physical downlink control channel (PDCCH) transmission received on a first CC in a group of CCs.

4. The method according to claim 2, wherein: The one or more CIFs indicate a group of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the group of CCs.

5. The method according to claim 2, wherein: The one or more CIFs are included in at least one downlink control information (DCI) of the cross-carrier scheduling indication.

6. The method according to claim 2, wherein: The cross-carrier scheduling indication of the at least one CC index is included in at least one of a Uu medium access control (MAC) control element (CE), downlink control information (DCI), or a second sidelink transmission.

7. The method according to claim 6, wherein: The second sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), sidelink control information 1 (SCI1), level N SCI (SCI-N), a physical sidelink shared channel (PSSCH) or a sidelink medium access control (MAC) control element (CE).

8. The method according to claim 2, wherein: The cross-carrier scheduling indication of the at least one CC index is received by at least one of the first UE corresponding to a transmitter of one or more sidelink transmissions and a second UE corresponding to a receiver of the one or more sidelink transmissions.

9. The method according to claim 1, wherein Determining the at least one CC index for the first sidelink transmission with the second UE and the Uu transmission with the network entity further comprises determining the at least one CC index according to an indication based on a preconfigured rule.

10. The method according to claim 1, further comprising: A physical uplink control channel (PUCCH) group is determined based on the at least one CC index used for the first sidelink transmission with the second UE and the Uu transmission with the network entity.

11. The method according to claim 10, wherein: The PUCCH group is associated with a single CC in which the PUCCH is transmitted.

12. The method according to claim 1, further comprising: A physical sidelink feedback channel (PSFCH) group is determined based on the at least one CC index used for the first sidelink transmission with the second UE and the Uu transmission with the network entity.

13. The method according to claim 1, wherein The first sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink feedback channel (PSFCH), a sidelink channel state information reference signal (SL CSI-RS) or a SL-CSI report.

14. The method according to claim 1, wherein The Uu transmission corresponds to at least one of the following: an ACK / NACK in response to receiving a sidelink acknowledgement (ACK) / negative acknowledgement (NACK) from the second UE, a report of the sidelink channel state information / positioning state information (CSI / PSI) sent in response to receiving the SL CSI / PSI, or a measurement of the received sidelink channel state information reference signal (SL CSI-RS) / sidelink positioning reference signal (SL PRS).

15. A method for wireless communication at a network entity, comprising: sending a cross-carrier scheduling indication to a first user equipment (UE), the cross-carrier scheduling indication comprising one or more carrier indicator fields (CIFs), the one or more CIFs configured to determine at least one component carrier (CC) index for a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the at least one CC index indicating one or more CCs in which the first sidelink transmission and the Uu transmission occur; as well as The Uu transmission is received from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

16. The method according to claim 15, wherein The cross-carrier scheduling indication corresponds to a physical downlink control channel (PDCCH) transmission sent on a first CC in a group of CCs.

17. The method according to claim 16, wherein The one or more CIFs indicate a group of CCs, and wherein at least one of the first sidelink transmission and the Uu transmission occurs in one or more CCs in the group of CCs.

18. The method according to claim 16, wherein The one or more CIFs are included in at least one downlink control information (DCI) of the cross-carrier scheduling indication.

19. The method according to claim 16, wherein The cross-carrier scheduling indication of the at least one CC index is included in at least one of: a Uu medium access control (MAC) control element (CE), downlink control information (DCI), or a second sidelink transmission.

20. The method according to claim 19, wherein The second sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), sidelink control information 1 (SCI1), level N SCI (SCI-N), a physical sidelink shared channel (PSSCH) or a sidelink medium access control (MAC) control element (CE).

21. The method according to claim 16, wherein The cross-carrier scheduling indication of the at least one CC index is received by at least one of the first UE corresponding to a transmitter of one or more sidelink transmissions and a second UE corresponding to a receiver of the one or more sidelink transmissions.

22. The method according to claim 15, wherein The at least one CC index used for the first sidelink transmission with the second UE and the Uu transmission with the network entity is according to an indication based on a pre-configured rule.

23. The method of claim 15, further comprising: A physical uplink control channel (PUCCH) group is determined based on the at least one CC index used for the first sidelink transmission with the second UE and the Uu transmission with the network entity.

24. The method according to claim 23, wherein The PUCCH group is associated with a single CC in which the PUCCH is received.

25. The method of claim 15, further comprising: A physical sidelink feedback channel (PSFCH) group is determined based on the at least one CC index used for the first sidelink transmission with the second UE and the Uu transmission with the network entity.

26. The method according to claim 25, further comprising: determining to schedule cross-CC transmission for a first CC and a second CC, wherein the first CC is different from the second CC; determining that the first CC and the second CC are associated with the PSFCH group; and Scheduling the cross-CC transmission for the first CC and the second CC is achieved based on a determination that the first CC and the second CC are associated with the PSFCH group.

27. The method according to claim 15, wherein The first sidelink transmission corresponds to at least one of the following: a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink feedback channel (PSFCH), a sidelink channel state information reference signal (SL CSI-RS) or a SL-CSI report.

28. The method according to claim 15, wherein The Uu transmission corresponds to at least one of the following: an ACK / NACK in response to receiving a sidelink acknowledgement (ACK) / negative acknowledgement (NACK) from the second UE, a report of the sidelink channel state information / positioning state information (CSI / PSI) sent in response to receiving the SL CSI / PSI, or a measurement of the received sidelink channel state information reference signal (SL CSI-RS) / sidelink positioning reference signal (SL PRS).

29. An apparatus for wireless communication at a first user equipment (UE), comprising: transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to: determining at least one component carrier (CC) index for a first sidelink transmission with a second UE and a Uu transmission with a network entity, the at least one CC index indicating one or more CCs in which the first sidelink transmission and the Uu transmission occur; as well as Transmitting the first sidelink transmission to the second UE and transmitting the Uu transmission to the network entity are performed based on the at least one CC index.

30. An apparatus for wireless communication at a network entity, comprising: transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to: sending a cross-carrier scheduling indication to a first user equipment (UE), the cross-carrier scheduling indication comprising one or more carrier indicator fields (CIFs), the one or more CIFs configured to determine at least one component carrier (CC) index for a first sidelink transmission between the first UE and a second UE and a Uu transmission with a network entity, the at least one CC index indicating one or more CCs in which the first sidelink transmission and the Uu transmission occur; and The Uu transmission is received from the first UE in response to sending the cross-carrier scheduling indication, wherein the Uu transmission occurs on the one or more CCs.

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