Authorized Operation for Configuration of New Radio Unlicensed Spectrum Carrier Aggregation

Abstract

Configured authorized operation for New Radio (NR) unlicensed spectrum (NR‑U) carrier aggregation (CA) is disclosed. In one aspect, a method for wireless communication by a user equipment (UE) may include sending uplink (UL) data to a base station according to a configured authorized configuration. The method may also include determining a carrier to receive feedback from the base station based on the configured authorized configuration. The method may further include receiving feedback from the base station on the carrier in response to the sending of the UL data.

Description

[0001] This application claims the benefit of Indian Provisional Application Serial No. 201941007087, filed on February 22, 2019, entitled “Configured Grant Operation for New Radio Unlicensed Spectrum Carrier Aggregation” and U.S. Patent Application No. 16 / 793,756, filed on February 18, 2020, entitled “CONFIGURED GRANT OPERATION FOR NEW RADIO UNLICENSED Spectrum Carrier Aggregation,” the entire contents of which are expressly incorporated herein by reference. Background Art

[0002] Aspects of the present disclosure relate generally to communication systems and, more particularly, to configured licensed operation for New Radio (NR) unlicensed spectrum (NR-U) carrier aggregation (CA).

[0003] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. 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.

[0004] These multiple access technologies have been adopted by various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a municipal, national, regional, and even global level. An example telecommunication standard is 5G NR technology. 5G NR technology is part of the continued mobile broadband evolution promulgated by the 3rd Generation Partnership Project (3GPP) and is designed to meet new requirements related to latency, reliability, security, scalability (e.g., Internet of Things (IoT)), and other requirements. 5G NR technology includes services related to enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR technology may be based on the 4G Long Term Evolution (LTE) standard.

[0005] In some cases, a user equipment (UE) waits to receive an explicit physical downlink control channel (PDCCH) (e.g., an uplink (UL) grant) from a base station before sending UL data. However, due to the low latency requirements and critical timing requirements in 5G NR technology, the UE may need to send before receiving the UL grant from the base station. In addition, the UE may not know which resources or carriers contain feedback in response to the UL data. Therefore, further improvements to 5G NR technology are needed. Summary of the invention

[0006] A simplified summary of one or more aspects is presented below to provide a basic understanding of these 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 a more detailed description that is presented later.

[0007] In one aspect, a method of wireless communication by a user equipment (UE) is disclosed. The method may include sending uplink (UL) data to a base station according to a configured grant configuration. The method may also include determining a carrier to receive feedback from the base station based on the configured grant configuration. The method may further include receiving feedback from the base station on the carrier in response to the sending of the UL data.

[0008] In another aspect, a UE for wireless communication is disclosed. The UE may include a memory storing instructions, and a processor communicatively coupled to the memory. The processor may be configured to send UL data to a base station according to a configured grant configuration. The processor may also be configured to determine a carrier to receive feedback from the base station based on the configured grant configuration. The processor may also be configured to receive feedback from the base station on a carrier in response to the transmission of the UL data.

[0009] In one aspect, a computer-readable medium storing computer-executable code for wireless communication by a UE is disclosed. The computer-readable medium may include code for sending UL data to a base station according to a configured grant configuration. The computer-readable medium may also include code for determining a carrier to receive feedback from the base station based on the configured grant configuration. The computer-readable medium may also include code for receiving feedback from the base station on a carrier in response to the transmission of the UL data.

[0010] In one aspect, an apparatus for wireless communication is disclosed. The apparatus may include means for sending UL data to a base station according to a configured grant configuration. The apparatus may also include means for determining a carrier to receive feedback from the base station based on the configured grant configuration. The apparatus may also include means for receiving feedback from the base station on a carrier in response to the sending of the UL data.

[0011] In one aspect, a method for wireless communication by a base station is disclosed. The method may include receiving UL data from a UE according to a configured grant configuration. The method may further include determining a carrier to send feedback to the UE based on the configured grant configuration. The method may also include sending feedback to the UE on a carrier in response to receiving the UL data.

[0012] In another aspect, a base station for wireless communication is disclosed. The base station may include a memory storing instructions, and a processor communicatively coupled to the memory. The processor may be configured to receive UL data from a UE according to a configured grant configuration. The processor may also be configured to determine a carrier to send feedback to the UE based on the configured grant configuration. The processor may also be configured to send feedback to the UE on a carrier in response to receiving the UL data.

[0013] In one aspect, a computer-readable medium storing computer-executable code for wireless communication by a base station is disclosed. The computer-readable medium may include code for receiving UL data from a UE according to a configured grant configuration. The computer-readable medium may also include code for determining a carrier to send feedback to the UE based on the configured grant configuration. The computer-readable medium may also include code for sending feedback to the UE on a carrier in response to receiving the UL data.

[0014] In one aspect, an apparatus for wireless communication is disclosed. The apparatus may include a component for receiving UL data from a UE according to a configured grant configuration. The apparatus may also include a component for determining a carrier to send feedback to the UE based on the configured grant configuration. The apparatus may also include a component for sending feedback to the UE on a carrier in response to receiving the UL data.

[0015] To accomplish the foregoing and related ends, one or more aspects include features fully described below 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 only a few of the various ways in which the principles of the various aspects may be employed, and the present description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided for illustration and not limitation of the disclosed aspects, wherein like reference numerals represent like elements, and wherein:

[0017] Figure 1 is a schematic diagram of an example of a wireless communication system and access network according to aspects of the present disclosure;

[0018] Figure 2According to aspects of the present disclosure Figure 1 An example of communication between a user equipment (UE) and a base station;

[0019] Figure 3 is a flowchart of an example of a method of wireless communication by a UE according to aspects of the present disclosure;

[0020] Figure 4 According to aspects of the present disclosure Figure 1 A schematic diagram of an example of a UE;

[0021] Figure 5 is a flowchart of an example of a method of wireless communication performed by a base station according to aspects of the present disclosure; and

[0022] Figure 6 According to aspects of the present disclosure Figure 1 A schematic diagram of an example of a base station. DETAILED DESCRIPTION

[0023] The specific embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to represent the only configurations in which the concepts described herein may be practiced. Specific implementation methods include specific details for providing a thorough understanding of the various concepts. However, it is 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 these concepts.

[0024] For a configured grant in carrier aggregation mode, different resource sets may be configured in different carriers. According to the present disclosure, options for configured grant defect feedback indicator (CG-DFI) feedback, configured grant configuration, and activation / deactivation in carrier aggregation (CA) situations and / or grant assisted access (LAA) situations are disclosed.

[0025] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] For example, an element or any part of an element or any combination of elements may be implemented as a "processing system" including 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, systems 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 that are configured to perform the various functions described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc., whether referring to software, firmware, middleware, microcode, hardware description languages, etc.

[0027] Therefore, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may 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 may be any available media that a computer can access. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the above types of computer-readable media, or any other media that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0028] On the one hand, the configured grant mode refers to a mode in which some resources in the uplink (UL) are pre-configured for a user equipment (UE) in 5G NR technology. When the UE has data to send but does not receive an explicit physical downlink control channel (PDCCH) (e.g., UL grant) for specific resources, the UE can refer to the configured grant mode for autonomous UL data transmission.

[0029] For NR-Unlicensed Spectrum (NR-U), the configured authorized mode can support two configuration modes. In the first mode (Type A), the parameters of the UE can be configured by the upper protocol layer (e.g., the radio resource control (RRC) layer). In the second mode (Type B), activation and deactivation as well as some parameter changes can be allowed via downlink (DL) control information (DCI) signals.

[0030] For configured granted UL transmissions in unlicensed spectrum, the base station can send acknowledgement (ACK) / negative ACK (NACK) feedback in DL. This can be used for two purposes: first, for hybrid automatic repeat request (HARQ) processes configured for configured grants, ACK / NACK feedback can be provided to enable autonomous retransmissions in the configured granted resources; second, for all HARQ processes, ACK / NACK feedback can be provided for contention window updates.

[0031] In an unlicensed spectrum (e.g., 5 GHz), a base station may use a certain amount of bandwidth (BW) (e.g., 80 MHz) in a carrier aggregation (CA) mode (e.g., 4 carriers of 20 MHz each). CA operation may be beneficial because listen-before-talk (LBT) may be performed per a specified certain number of units (e.g., units of 20 MHz). In some aspects, a base station / UE may gain access on some carriers but not on other carriers.

[0032] For a configured grant in CA mode, different resource sets may be configured in different carriers. According to the present disclosure, options for configured grant-DFI feedback, configured grant configuration, and activation / deactivation in CA cases and / or Grant Assisted Access (LAA) cases are disclosed.

[0033] In some aspects, different options may be applied to CG-DFI feedback. For example, in the first option, the CG-DFI for a specific carrier is sent only on the DL resources of that carrier. In the second option, in the case of LAA, the CG-DFI for a specific carrier is sent only on the DL resources of that carrier and / or the licensed carrier. In the third option, in the case of LAA, the CG-DFI is sent only on the licensed carrier. The third option may not appear as often as the first and second options, but there may be benefits to offloading more content to unlicensed spectrum. In the fourth option, if there is a concept of a primary carrier for subband LBT, the CG-DFI for all carriers can be sent only on the primary carrier. In the fifth option, if there is a concept of a primary carrier for subband LBT, the CG-DFI for all carriers can be sent only on the primary carrier or the carrier. In the sixth option, the CG-DFI for any carrier can be sent on any carrier.

[0034] In one aspect, the above options may be selected based on whether the UE is in CA mode, dual connectivity (DC) mode, or standalone (SA) mode. In some aspects, a set of carriers to monitor for CG-DFI may be indicated as part of the configured grant configuration. In addition, similar options may also be applied to activate / deactivate DCI.

[0035] In some aspects, some of the above options may include adding a close-inreference short with frequency (CIF) field to indicate which carrier can be used. The following are CG-DFI options for multiple carriers. In option 1, one DCI may be used for each carrier. In option 2, there may be different DCIs for different subsets (e.g., one DCI for carriers 0 and 1, and another DCI for carriers 2 and 3). In option 2, the subsets may be fixed (e.g., RRC configured) or dynamic (e.g., the DCI may indicate that the DCI is dynamically applied to carriers 0 and 2). In addition, in option 2, the number / maximum number of subsets / sets of subsets included in the DCI may be fixed (e.g., RRC configured). For example, there may be feedback for up to two carriers. In option 3, a common DCI can be used for all carriers.

[0036] In one aspect, the DCI design can be as follows. In option 1, the DCI can be sized for all carriers at all times. For example, the number of HARQ processes can be the total number of HARQ processes on each component carrier. In option 2, a bitmap or other indication can indicate the set of component carriers to which the DCI applies (which is in a subset of the carriers for which the DCI is designed). The remaining bits in the DCI can be distributed across the HARQ processes accordingly. For example, if the DCI has 36 bits, a 4-bit bitmap indicates which carriers the DCI applies to. In one example, the DCI can apply to 8 HARQ processes per carrier.

[0037] In some examples, if only one carrier is enabled in the DCI, each HARQ process may have 4 bits for feedback (e.g., code block group (CBG) level ACK / NACK). In some examples, if two carriers are configured, each HARQ process for each carrier may have 2 bits for CBG level ACK / NACK feedback. In some examples, if all 4 carriers are configured, we may have transport block (TB) level HARQ ACK feedback. In option 3, joint coding at TB level / CBG level for different carriers / HARQ processes can be done, where some TBs can be sent with TB level ACK and other TBs can be sent with CBG level ACK.

[0038] In some aspects, the configuration of the authorization activation / deactivation for DCI can be as follows. Similar techniques / flexibility discussed for CG-DFI feedback can also be used for the configuration of authorization activation DCI and deactivation DCI (release DCI) used in the authorization of type B configuration. In some examples, the options for cross-carrier activation / deactivation may include: independent activation / deactivation on each carrier; activation / deactivation can always be performed for all carriers together, or as a sub-option, only unauthorized or unauthorized and authorized; or the options for activation and deactivation may be different. For example, the activation of each carrier may be independent, but the deactivation may be common to all carriers. In this regard, the DCI design details may include: common DCI for all carriers, and in some examples, only unauthorized carriers or unauthorized and authorized carriers can be applied. In addition, a carrier indication bitmap can be introduced instead of CIF to indicate which carrier is activated / deactivated. In some examples, for the carrier indication bitmap, when different carriers require different parameters, different parameters can be used to send multiple DCIs for different carriers. When the parameters are common, the same DCI can be used and the bitmap can be set for multiple carriers. Thus, this provides complete flexibility while still helping to reduce overhead in cases where parameters are common, etc. In some examples, certain fields may also be common across carriers, but certain fields may be per-carrier. For example, the MCS may be common across carriers, but we may want resource allocations to be per-carrier. Fields across carriers may be jointly encoded. For example, only certain combinations of resource allocations across different carriers may be allowed. This may allow for the reuse of a common DCI for multiple carriers, even at the expense of potentially larger DCI sizes while certain parameters may differ across carriers. In some aspects, separate DCIs may be used for each carrier. Some unused fields in the hard-coded activation / deactivation DCI may be used to indicate carrier-specific information, or which carriers the activation / deactivation DCI applies to. Thus, the DCI may not need to be increased in size.

[0039] On the one hand, the configured grant configuration across carriers may include different techniques. For example, the RRC configuration may be common to all carriers or done independently for each carrier. The configuration of the configured grant may use the different options provided above. The time domain resources may be configured the same across carriers or independently. Some resources may improve simultaneous access across carriers. This may also be applied to sub-symbol start offset calculations across carriers. Some parameters, such as modulation and coding scheme (MCS), CG HARQ process, etc., may be the same across carriers, some parameters may be different across carriers, but the combinations between carriers may be restricted (e.g., frequency domain resource allocation (FDRA)), and some parameters across carriers may be completely independent.

[0040] In one aspect, subbands in a bandwidth part (BWP) may be applied similarly to carriers, as described above. For example, while the ideas described previously are in the context of multiple carriers, similar ideas may also apply to subbands within a broadband BWP covering multiple subbands (with independent LBT). In some examples, resources may be configured across subbands, and the UE may select a subband for sending a configured grant based on the LBT results. In some examples, the UE may be restricted to transmitting on only one subband, or may be allowed to transmit on more than one subband. In some examples, the UE may send different HARQ identities (IDs) on different subbands or on the same TB rate matched across all subbands.

[0041] In one aspect, the configuration across subbands may be considered as independent configurations or may be a common configuration. Similarly, activation / deactivation / DFI may be common or independent. For example, the HARQ IDs across different subbands may be different or common. In another example, FDRA across subbands may be obtained by repeating resource allocations on one subband with a subband-specific offset. In some examples, instead of using a bitmap-based indication, the subband may use a starting subband or multiple subband type indications to reduce DCI overhead. For example, the UE may only transmit using contiguous subbands, so DFI feedback may also be limited to only contiguous subbands.

[0042] Turning now to the drawings, examples of systems and methods for configured authorization operations are depicted. It should be understood that various aspects of the drawings may not be drawn to scale but are drawn for illustrative purposes.

[0043] Figure 1 1 is a 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 a 5G core (5GC) 190.

[0044] The base station 102 may include a modem 140 having a configured grant feedback component 142, which may be configured to receive UL data from the UE according to a configured grant configuration, determine a carrier to send feedback from the base station based on the configured grant configuration, and send feedback to the UE on the carrier in response to receipt of the UL data.

[0045] UE 104 may include a modem 144 having a configured grant configuration component 146 that may be configured to send UL data to a base station according to a configured grant configuration, determine a carrier to receive feedback from the base station based on the configured grant configuration, and receive feedback from the base station on the carrier in response to the sending of the UL data.

[0046] In one aspect, base stations 102 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.

[0047] A base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a backhaul link 184. The base station 102 may perform one or more of the following functions, among other functions: 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, non-access stratum (NAS) message distribution, 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 (e.g., through EPC 160 or 5GC 190) via backhaul links 134 (e.g., X2 interfaces). Backhaul links 134 and 184 may be wired or wireless.

[0048] Base stations 102 can communicate wirelessly with UE 104. Each base station 102 can provide communication coverage for a corresponding geographic coverage area 110. There may 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 including 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 the base station 102 and the UE 104 can include an uplink (UL) (also called a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also called a forward link) transmission from the base station 102 to the UE 104. The communication link 120 can use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link can be through one or more carriers. Base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in carrier aggregation for up to a total of Yx MHz (x component carriers) for transmission in each direction. The carriers may 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 carrier 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).

[0049] Certain UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 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). D2D communication may be through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, LTE, or NR.

[0050] The wireless communication system may further include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi base station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. 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 prior to communication.

[0051] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may enhance coverage of the access network and / or increase capacity of the access network.

[0052] The base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), can include an eNB, a gNodeB (gNB), or other types of base stations. Some base stations (e.g., gNB 180) can operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with the UE 104. When the gNB 180 operates at mmW or near mmW frequencies, the gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz with wavelengths between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can extend down to frequencies of 3 GHz with wavelengths of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz and is also called centimeter waves. Communications using mmW / near mmW radio bands have extremely high path losses and short distances. The mmW base station 180 may use beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0053] The 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. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. Typically, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) data packets are transmitted through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to the IP service 176. The IP service 176 may include the Internet, the intranet, the IP multimedia subsystem (IMS), the PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provision and delivery. The BM-SC 170 may be used as an entry point for content provider MBMS delivery, may be used to authorize and start MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS delivery. The MBMS Gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts specific services, and may be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0054] 5GC 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. AMF 192 may communicate with unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and 5GC 190. Typically, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) data packets are transmitted through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, intranet, IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0055] Base station 102 may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), or some other suitable term. Base station 102 provides an access point to EPC 160 or 5GC 190 for UE 104. Examples of UE 104 include a cellular phone, a smart phone, 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 (such as an MP3 player), a camera, a game console, a tablet computer, 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, a toaster, 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 handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0056] refer to Figure 2 , discloses an example diagram 200 of communication between a base station 102 and a UE 104. In one example, the base station 102 may optionally send a DCI to the UE 104 at 202. The DCI may include a configured grant configuration parameter for use by the UE 104. In one example, the parameter may include an indication of one or more carriers for the UE 104 to monitor to receive feedback from the base station 102. At 204, the UE may be configured according to the configured grant configuration. In one example, the configured grant configuration may be received from an upper protocol layer of the UE (e.g., an RRC layer) or from a DCI sent from the base station 102. In one aspect, the configured grant configuration may be based on whether the UE is in a CA mode, a dual connectivity (DC) mode, or a single standalone (SA) mode. In another example, the configured grant configuration may indicate a set of carriers for the UE 104 to monitor for feedback (e.g., CG-DFI feedback). Based on the configured grant configuration, at 206, the UE 104 may send UL data to the base station 102 without receiving a UL grant from the base station 102. In response to receiving the UL data, the base station 102 may send feedback to the UE 104 at 208. In an example, the feedback may include an ACK / NACK for the UL data. In addition, based on the configured grant configuration, the UE 104 may monitor one or more carriers to determine the one or more carriers to monitor to receive feedback.

[0057] refer to Figure 3 , discloses an example of a method 300 for wireless communication. The method 300 may be Figure 1 UE 104 and any components of UE 104. For example, method 300 can be performed by one or more of processor 412, transceiver 402, modem 144, or configured authorization configuration component 146.

[0058] At 302, method 300 may include sending UL data to a base station according to a configured grant configuration. For example, one or more of the processor 412, transceiver 402, modem 144, or configured grant configuration component 146 of UE 104 may be configured to send UL data to base station 102 according to the configured grant configuration. Thus, one or more of the processor 412, transceiver 402, modem 144, configured grant configuration component 146, and / or one or more other components / subcomponents of UE 104 may define means for sending UL data to base station 102 according to the configured grant configuration. In an example, UL data may be sent to base station 102 without UE 104 receiving a UL grant. In some examples, the configured grant configuration is received from an upper protocol layer of UE 104 or from base station 102 via a DCI signal.

[0059] At 304, method 300 may include determining a carrier to receive feedback from a base station based on a configured grant configuration. For example, one or more of processor 412, transceiver 402, modem 144, or configured grant configuration component 146 of UE 104 may be configured to determine a carrier to receive feedback (e.g., feedback at 208) from base station 102 based on a configured grant configuration. Thus, one or more of processor 412, transceiver 402, modem 144, configured grant configuration component 146, and / or one or more other components / subcomponents of UE 104 may define means for determining a carrier to receive feedback (e.g., feedback at 208) from base station 102 based on a configured grant configuration. In some examples, the carrier to receive feedback may be determined to be the same carrier as the carrier used to send UL data or one or more of a licensed carrier. In some examples, the carrier to receive feedback may be determined to be the same carrier as the carrier used to send UL data or one or more of a primary carrier used for subband listen-before-talk (LBT). In some examples, the carrier receiving the feedback may be determined to be one or more of any carriers corresponding to base station 102. In some examples, the carrier receiving the feedback may be determined based on one or more of a carrier aggregation mode, a dual connectivity mode, or an independent mode. In some examples, the carrier receiving the feedback may be determined based on a set of carriers identified by a configured grant configuration.

[0060] At 306, the method 300 may include receiving feedback from the base station on the carrier in response to the transmission of the UL data. For example, one or more of the processor 412, the transceiver 402, the modem 144, or the configured grant configuration component 146 of the UE 104 may be configured to receive feedback from the base station 102 on the carrier in response to the transmission of the UL data. Thus, one or more of the processor 412, the transceiver 402, the modem 144, the configured grant configuration component 146, and / or one or more other components / subcomponents of the UE 104 may define means for receiving feedback from the base station 102 on the carrier in response to the transmission of the UL data. For example, the UE 104 may monitor one or more carriers to receive feedback from the base station 102. In one example, the feedback may include ACK / NACK feedback and / or CG-DFI feedback.

[0061] refer to Figure 4 , one example of an implementation of the UE 104 may include various components, some of which have been described above, but include components such as one or more processors 412, memory 416, and transceiver 402 communicating via one or more buses 444, which may operate in conjunction with the modem 144 to enable one or more functions of the method 300 described herein. The one or more processors 412, modem 140, memory 416, transceiver 402, RF front end 488, and one or more antennas 465 may be configured to support voice and / or data calls (simultaneous or non-simultaneous) in one or more radio access technologies.

[0062] In one aspect, the one or more processors 412 may include a modem 144 using one or more modem processors. Various functions associated with the configured authorization configuration component 146 may be included in the modem 144 and / or the processor 412, and may be performed by a single processor in one aspect, while in other aspects, different functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 412 may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with the transceiver 402. In other aspects, some features of the one or more processors 412 and / or the modem 144 may be performed by the transceiver 402.

[0063] In addition, the memory 416 can be configured to store local versions of data and / or applications 475 used herein, or the configured authorization configuration component 146 and / or one or more subcomponents thereof executed by the at least one processor 412. The memory 416 can include any type of computer-readable medium usable by a computer or the at least one processor 412, such as random access memory (RAM), read-only memory (ROM), tape, disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, the memory 416 can be a non-transitory computer-readable storage medium that stores one or more computer-executable codes that define the configured authorization configuration component 146 and / or one or more subcomponents thereof, and / or data associated therewith when the UE 104 is operating the at least one processor 412 to execute the configured authorization configuration component 146 and / or one or more of its subcomponents.

[0064] The transceiver 402 may include at least one receiver 406 and at least one transmitter 408. The receiver 406 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and stored in a memory (e.g., a computer-readable medium). For example, the receiver 406 may be a radio frequency (RF) receiver. In one aspect, the receiver 406 may receive a signal transmitted by at least one of the base stations 102. In addition, the receiver 406 may process such a received signal and may also obtain measurements of the signal, such as but not limited to Ec / Io, SNR, RSRP, RSSI, etc. The transmitter 408 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 408 may include, but are not limited to, an RF transmitter. The transceiver 402, the receiver 406, and / or the transmitter 408 may be configured to operate at mmW frequencies and / or near mmW frequencies.

[0065] In addition, in an aspect, the UE 104 can include an RF front end 488 that can operate in communication with the one or more antennas 465 and the transceiver 402 to receive and transmit radio transmissions, such as wireless communications transmitted by at least one of the base stations 102, or wireless transmissions transmitted by the UE 104. The RF front end 488 can be connected to the one or more antennas 465 and can include one or more low noise amplifiers (LNAs) 490, one or more switches 492, one or more power amplifiers (PAs) 498, and one or more filters 496 for transmitting and receiving RF signals.

[0066] In one aspect, the LNA 490 can amplify the received signal at a desired output level. In one aspect, each LNA 490 can have a specified minimum and maximum gain value. In one aspect, the RF front end 488 can use one or more switches 492 to select a particular LNA 490 and its specified gain value based on the desired gain value for a particular application.

[0067] The RF front end 488 can use one or more PAs 498 to amplify the signal for RF output at a desired output power level. In one aspect, each PA 498 can have a specified minimum and maximum gain value. In one aspect, the RF front end 488 can use one or more switches 492 to select a specific PA 498 and its specified gain value based on the desired gain value for a particular application.

[0068] In addition, for example, the RF front end 488 can use one or more filters 496 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, a corresponding filter 496 can be used to filter the output from the corresponding PA 498 to produce an output signal for transmission. In one aspect, each filter 496 can be connected to a specific LNA 490 and / or PA 498. In one aspect, based on the configuration specified by the transceiver 402 and / or the processor 412, the RF front end 488 can use one or more switches 492 to select a transmit or receive path using a specified filter 496, LNA 490, and / or PA 498.

[0069] Thus, the transceiver 402 may be configured to transmit and receive wireless signals via the RF front end 488 through the one or more antennas 465. In one aspect, the transceiver 402 may be tuned to operate at a specified frequency so that the UE 104 may communicate with, for example, one or more base stations 102 or one or more cells associated with the one or more base stations 102. In one aspect, the modem 144 may configure the transceiver 402 to operate at a specified frequency and power level based on, for example, a UE configuration of the UE 104 and a communication protocol used by the modem 144.

[0070] In one aspect, the modem 144 can be a multi-band multi-mode modem that can process digital data and communicate with the transceiver 402 so that the digital data is sent and received using the transceiver 402. In one aspect, the modem 144 can be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 144 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 144 can control one or more components (e.g., RF front end 488, transceiver 402) of the UE 104 to enable the transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem 144 and the frequency band used. In another aspect, the modem configuration can be based on the UE configuration information associated with the UE 104 provided by the network during cell selection and / or cell reselection.

[0071] refer to Figure 5 , discloses an example of a method 500 for wireless communication. The method 500 may be Figure 1 The method 500 may be performed by the base station 102 and any components of the base station 102. For example, the method 500 may be performed by one or more of the processor 612, the transceiver 602, the modem 140, or the configured authorization feedback component 142.

[0072] At 502, method 500 may include receiving UL data from a UE in accordance with a configured grant configuration. For example, one or more of processor 612, transceiver 602, modem 140, or configured grant feedback component 142 may receive UL data from UE 104 in accordance with the configured grant configuration. Thus, one or more of processor 612, transceiver 602, modem 140, configured grant feedback component 142, and / or one or more other components / subcomponents of base station 102 may define means for receiving UL data from UE 104 in accordance with the configured grant configuration.

[0073] At 504, method 500 may include determining a carrier to send feedback to the UE based on the configured grant configuration. For example, one or more of processor 612, transceiver 602, modem 140, or configured grant feedback component 142 may determine a carrier to send feedback to UE 104 based on the configured grant configuration. Thus, one or more of processor 612, transceiver 602, modem 140, configured grant feedback component 142, and / or one or more other components / subcomponents of base station 102 may define a component for determining a carrier to send feedback to UE 104 based on the configured grant configuration. In some examples, the carrier to send feedback may be determined to be the same carrier as the carrier used to receive UL data or one or more of the authorized carriers. In some examples, the carrier to send feedback may be determined to be the same carrier as the carrier used to receive UL data or one or more of the primary carriers used for subband listen-before-talk (LBT). In some examples, the carrier to send feedback may be determined to be one or more of any carrier corresponding to base station 102. In some examples, the carrier on which the feedback is sent may be determined based on one or more of a carrier aggregation mode, a dual connectivity mode, or an independent mode. In some examples, the carrier on which the feedback is sent may be determined based on a set of carriers identified by a configured grant configuration.

[0074] At 506, the method 500 may also include sending feedback to the UE on the carrier in response to the reception of the UL data. For example, one or more of the processor 612, the transceiver 602, the modem 140, or the configured grant feedback component 142 may send feedback to the UE 104 on the carrier in response to the reception of the UL data. Thus, one or more of the processor 612, the transceiver 602, the modem 140, the configured grant feedback component 142, and / or one or more other components / subcomponents of the base station 102 may define means for sending feedback to the UE 104 on the carrier in response to the reception of the UL data. In one example, the feedback may include ACK / NACK feedback and / or CG-DFI feedback.

[0075] In some aspects, the configured grant configuration may be sent from the base station 102 to the UE 104 via a DCI signal.

[0076] refer to Figure 6 , one example of an implementation of the base station 102 may include a variety of components, some of which have been described above, but include components such as one or more processors 612, memory 616, and a transceiver 602 that communicate via one or more buses 644, which may operate in conjunction with the modem 140 and the configured authorization feedback component 142 to enable one or more functions of the method 500 described herein.

[0077] The transceiver 602, receiver 606, transmitter 608, one or more processors 612, memory 616, applications 675, bus 644, RF front end 688, LNA 690, switch 692, filter 696, PA 698, and one or more antennas 665 may be the same or similar to the corresponding components of UE 104 described above, but configured or otherwise programmed for base station operation rather than UE operation.

[0078] Further example embodiments

[0079] An example method for wireless communication by a UE includes: sending uplink (UL) data to a base station according to a configured authorization configuration; determining a carrier to receive feedback from the base station based on the configured authorization configuration; and receiving feedback from the base station on the carrier in response to the sending of the UL data.

[0080] The above example method, wherein the configured grant configuration is received from an upper protocol layer of the UE or from a base station via a downlink (DL) control indicator (DCI) signal.

[0081] One or more of the above example methods, wherein the feedback is a configured authorization defect feedback indicator (CG-DFI) feedback.

[0082] One or more of the above example methods, wherein determining the carrier on which the feedback is received includes determining that the carrier on which the feedback is received is one or more of the same carrier as the carrier used to send the UL data or a licensed carrier.

[0083] One or more of the above example methods, wherein determining the carrier for receiving feedback includes: determining the carrier for receiving feedback to be the same carrier as the carrier for sending uplink data or one or more of the main carriers for subband listen-before-talk (LBT).

[0084] One or more of the above example methods, wherein determining the carrier on which the feedback is received includes: determining the carrier on which the feedback is received to be one or more of any carriers corresponding to the base station.

[0085] One or more of the above example methods, wherein determining the carrier to receive feedback is based on one or more of a carrier aggregation mode, a dual connectivity mode, or an independent mode.

[0086] One or more of the above example methods, wherein determining the carrier to receive feedback is based on a set of carriers identified by a configured grant configuration.

[0087] One or more of the above example methods, wherein feedback is received from the base station via a downlink (DL) control indicator (DCI) signal.

[0088] One or more of the above example methods, wherein the DCI signal is received in any one of a plurality of carriers, including a carrier used to receive feedback.

[0089] One or more of the above example methods, wherein the DCI signal is received in any one of a subset of a plurality of carriers, including a carrier for receiving feedback.

[0090] One or more of the above example methods, wherein the DCI signal is received in one of the multiple carriers, wherein the one carrier is a carrier for receiving feedback.

[0091] One or more of the above example methods, wherein the feedback is a configured grant deficiency feedback indicator (CG-DFI) feedback and indicates activation / deactivation of a configured grant.

[0092] One or more of the above example methods, wherein activation / deactivation of configured grants is on a per-carrier basis.

[0093] One or more of the above example methods, wherein the configured activation / deactivation of grants is for each of the plurality of carriers.

[0094] One or more of the above example methods, wherein activation of the configured grant is based on a per-carrier basis or for each of a plurality of carriers, and deactivation of the configured grant is based on a different basis than activation of the configured grant.

[0095] A second example method for wireless communication by a base station includes: receiving uplink (UL) data from a user equipment (UE) according to a configured authorization configuration; determining a carrier to send feedback to the UE according to the configured authorization configuration; and sending feedback to the UE on the carrier in response to receiving the UL data.

[0096] The second example method above, wherein the configured authorization configuration is received from an upper protocol layer.

[0097] One or more of the above second example method, wherein the feedback is a configured authorization defect feedback indicator (CG-DFI) feedback.

[0098] One or more of the above second example methods, wherein determining the carrier for sending feedback includes: determining the carrier for sending feedback to be one or more of the same carrier as the carrier for receiving UL data or a licensed carrier.

[0099] One or more of the above-mentioned second example methods, wherein determining the carrier for sending feedback includes: determining the carrier for sending feedback to be the same carrier as the carrier for receiving UL data or one or more of the main carriers for subband listen-before-talk (LBT).

[0100] One or more of the above second exemplary methods, wherein determining the carrier on which the feedback is sent comprises: determining that the carrier on which the feedback is sent corresponds to one or more of any carriers of the base station.

[0101] One or more of the above second example methods, wherein determining the carrier to send feedback is based on one or more of a carrier aggregation mode, a dual connectivity mode, or an independent mode.

[0102] One or more of the above second example methods, wherein determining the carriers on which to send feedback is based on a set of carriers identified by a configured grant configuration.

[0103] One or more of the above second example methods, wherein feedback is sent to the UE via a downlink (DL) control indicator (DCI) signal.

[0104] One or more of the above second example methods, wherein the DCI signal is sent in any one of a plurality of carriers, including a carrier used to send feedback.

[0105] One or more of the above second example methods, wherein the DCI signal is sent in any one of a subset of multiple carriers, including a carrier used to send feedback.

[0106] One or more of the above second example methods, wherein the DCI signal is sent in one carrier among multiple carriers, wherein the one carrier is a carrier in which feedback is sent.

[0107] One or more of the above second example method, wherein the feedback is a configured grant deficiency feedback indicator (CG-DFI) feedback and indicates activation / deactivation of a configured grant.

[0108] One or more of the above second example methods, wherein activation / deactivation of configured grants is on a per-carrier basis.

[0109] One or more of the above second example methods, wherein the configured activation / deactivation of grants is for each of the plurality of carriers.

[0110] One or more of the above second example methods, wherein activation of the configured grant is based on one of a per-carrier basis or for each of a plurality of carriers, and deactivation of the configured grant is based on a different basis than activation of the configured grant.

[0111] An example apparatus for wireless communication includes: a memory; and at least one processor coupled to the memory and configured to execute any one or more of the first example method or the second example method described above.

[0112] An example computer-readable medium storing computer-executable code includes: code for executing any one or more of the first example method or the second example method described above.

[0113] An example device includes: components for performing any one or more of the first example method or the second example method described above.

[0114] The above detailed description set forth above in conjunction with the accompanying drawings describes examples and does not represent the only examples that may be implemented or within the scope of the claims. The term "example" used in this specification means "used as an example, example, or illustration," rather than "preferred" or "better than other examples." Specific implementation methods include specific details for providing an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0115] Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer executable codes or instructions stored on a computer-readable medium, or any combination thereof.

[0116] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed with a specially programmed device, such as, but not limited to, a processor, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof intended to perform the functions described herein. The specially programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The specially programmed processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0117] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, these functions can be stored or sent as one or more instructions or codes on a non-transitory computer-readable medium. Other examples and embodiments are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a specially programmed processor, hardware, firmware, hard wiring, or a combination of any of these. The features of the implementation functions can also be physically located in different locations, including distribution so that some functions are implemented in different physical locations. In addition, as used herein, including in the claims, the "or" used in the list of items starting with "at least one" represents a separate list so that, for example, a list of "at least one of A, B, or C" refers to A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0118] Computer-readable media include computer storage media and communication media, including any media that facilitates sending a computer program from one place to another. Storage media can be any available media that can be accessed by a general or special computer. As an example and not limitation, computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the required program code in the form of instructions or data structures, and can be accessed by a general or special computer or a general or special processor. In addition, any connection is properly referred to as a computer-readable medium. For example, if the software is sent from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology (such as infrared, radio and microwave), the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology (such as infrared, radio and microwave) are all included in the definition of the medium. As used herein, disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks and blue-ray disks, wherein disks usually reproduce data magnetically, while optical disks reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0119] The previous description of the disclosure is provided to enable those skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the common principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. In addition, although the elements of the described aspects and / or embodiments may be described or claimed in the singular, the plural form is considered unless explicitly stated to be limited to the singular. In addition, unless otherwise stated, all or a portion of any aspect and / or embodiment may be used together with all or a portion of any other aspect and / or embodiment. Therefore, the disclosure is not limited to the examples and designs described herein, but is given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wireless communication method performed by a user equipment UE, comprising: receiving a configured grant configuration for a carrier aggregation mode from a base station, the configured grant configuration configuring the UE for autonomous UL data transmission on multiple carriers without an explicit uplink UL grant; sending uplink (UL) data on resources associated with the first carrier according to the configured grant configuration; and A downlink (DL) control signal is received, the DL control signal comprising feedback in response to UL data, the DL control signal further comprising an indication indicating which carrier the DL control signal is applied to, wherein in a first option the feedback is for UL data sent on the first carrier, and in a second option the feedback is for UL data sent on a second carrier.

2. The method of claim 1, wherein the carrier receiving the feedback comprises at least one carrier in an unlicensed spectrum used for the transmission of the UL data.

3. The method of claim 1, wherein the carrier receiving the feedback comprises a licensed carrier in a licensed spectrum.

4. The method of claim 1, wherein the carrier receiving the feedback comprises a main carrier for sub-band listen-before-talk (LBT).

5. The method of claim 1, wherein the carrier receiving the feedback comprises one or more of any carriers corresponding to the base station. The method of claim 1 , wherein the first option or the second option is further based on the configured authorization configuration.

7. A user equipment UE, comprising: a memory for storing instructions; and One or more processors, communicatively coupled to the memory and configured to: receiving a configured grant configuration for a carrier aggregation mode from a base station, the configured grant configuration configuring the UE to perform autonomous UL data transmission on multiple carriers without an explicit uplink UL grant; sending uplink (UL) data on resources associated with the first carrier according to the configured grant configuration; and A downlink (DL) control signal is received, the DL control signal comprising feedback in response to UL data, the DL control signal further comprising an indication indicating which carrier the DL control signal is applied to, wherein in a first option the feedback is for UL data sent on the first carrier, and in a second option the feedback is for UL data sent on a second carrier.

8. The UE of claim 7, wherein the first option or the second option is further based on the configured authorization configuration.

9. The UE according to claim 7, wherein: The carrier receiving the feedback includes at least one carrier in an unlicensed spectrum used by the processor to send the UL data.

10. The UE according to claim 7, wherein: The carrier receiving the feedback includes an authorized carrier in an authorized spectrum.

11. The UE according to claim 7, wherein: The carrier receiving the feedback includes a primary carrier for a subband Listen Before Talk (LBT).

12. The UE according to claim 7, wherein: The carriers receiving the feedback include one or more of any carriers corresponding to the base station.

13. A base station, comprising: a memory for storing instructions; and One or more processors are communicatively coupled to the memory and configured to: sending a configured grant configuration for a carrier aggregation mode to a user equipment UE, the configured grant configuration configuring the UE for autonomous UL data transmission on multiple carriers without an explicit uplink UL grant; receiving uplink (UL) data from the UE on resources associated with a first carrier according to the configured grant configuration; and and sending a downlink (DL) control signal to the UE, the DL control signal including feedback in response to UL data, the DL control signal also including an indication indicating which carrier the DL control signal is applied to, wherein in a first option, the feedback is for UL data sent on the first carrier, and in a second option, the feedback is for UL data sent on a second carrier.

14. The base station of claim 13, wherein the first option or the second option is further based on the configured authorization configuration.

15. The base station of claim 13, wherein the carrier on which the feedback is transmitted comprises at least one carrier in an unlicensed spectrum used by the processor to receive the UL data.

16. The base station according to claim 13, wherein: The carrier for sending the feedback includes an authorized carrier in an authorized spectrum.

17. The base station according to claim 13, wherein: The carrier sending the feedback includes a primary carrier for sub-band listen-before-talk LBT.

18. The base station according to claim 13, wherein: The carriers on which the feedback is sent include one or more of any carriers corresponding to the base station.

Images