Semi-persistent scheduling for broadcast or multicast communications

Abstract

This article describes a device associated with a UE, which may be configured to receive SPS configuration information for broadcast and / or multicast from a base station, the SPS configuration information indicating a resource set configured for feedback, wherein each TX beam in a TX beam set corresponds to a corresponding subset of the resource set. The device may be further configured to receive SPS signaling from the base station via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set. The device may be further configured to transmit feedback to the base station on one or more subsets corresponding to the one or more TX beams in the resource set, respectively, based on the SPS signaling, the feedback indicating one of ACK or NACK.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATION(S)

[0002] This application claims the U.S. Provisional Application No. 62 / 985,670, filed on March 5, 2020, entitled “SYSTEM AND METHOD FOR SEMI-PERSISTENT SCHEDULING FOR BROADCAST OR MULTICAST COMMUNICATION”; U.S. Provisional Application No. 62 / 985,710, filed on March 5, 2020, entitled “SYSTEM AND METHOD FOR SEMI-PERSISTENT SCHEDULING FOR BROADCAST OR MULTICAST COMMUNICATION”; U.S. Provisional Application No. 62 / 985,710, filed on March 5, 2020, entitled “SYSTEM AND METHOD FOR SEMI-PERSISTENT SCHEDULING FOR BROADCAST OR MULTICAST COMMUNICATION (System and method for semi-persistent scheduling for broadcast or multicast communications)"; and the benefit of U.S. patent application No. 17 / 183,111 filed on February 23, 2021, entitled "SEMI-PERSISTENT SCHEDULING FOR BROADCAST OR MULTICAST COMMUNICATION (Semi-persistent scheduling for broadcast or multicast communications)", which applications are assigned to the assignee of the present application and are incorporated herein by reference in their entirety.

[0003] background Technical Field

[0005] The present disclosure relates generally to communication systems, and more particularly to base stations and user equipment (UE) configured for at least one of broadcast or multicast communication utilizing semi-persistent scheduling.

[0006] introduction

[0007] Wireless communication systems are widely deployed to provide various 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.

[0008] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. 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 these technologies.

[0009] Overview

[0010] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define 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 will be presented later.

[0011] A base station may configure semi-persistent scheduling (SPS) for a user equipment (UE), according to which the base station may periodically (or semi-periodically) transmit data to the UE over multiple subframes. According to various aspects of the present disclosure, a base station may configure SPS for two or more UEs so that the base station may broadcast or multicast data to the two or more UEs.

[0012] Some network entities and / or some wireless or radio access technologies may not be designed for or may lack the ability to simultaneously transmit certain (or any) signaling common to multiple recipients (such as scheduling information or other control information common to multiple UEs, which may be UE-specific in some networks). For example, some base stations may not be able to use the same signaling to configure and communicate SPS transmissions for more than one UE. For example, some base stations may not be able to use SPS to configure broadcast or multicast communications; instead, such base stations may rely on unicast to configure the corresponding SPS for each UE individually.

[0013] The present disclosure describes various techniques and methods for SPS configuration for broadcast or multicast, as SPS may be beneficial in broadcast or multicast scenarios. Specifically, configuring SPS for a broadcast or multicast UE group can reduce signaling overhead (such as when multiple UEs are scheduled to receive traffic, the traffic is not UE-specific and is relatively stable over a fixed time period without the need for UE-specific link adaptation). For SPS broadcast or multicast transmissions, the base station can adjust the modulation and coding scheme (MCS), code rate, transmission mode, etc., so that the broadcast or multicast transmission can be received by the UE group at a target block error rate (BLER), even at the cell edge.

[0014] A broadcast or multicast transmission should be able to reach a large number of UEs in a large coverage area. To this end, beam sweeping is very important for extending the coverage of a base station, especially in frequency range 2 (FR2) of 5G New Radio (NR). However, if a base station transmits a broadcast or multicast transmission via a beam covering an area that no UE can receive, the resources carrying the transmission may be wasted, and unnecessary interference may be generated. Therefore, the present disclosure further describes techniques and methods for efficient allocation of resources for SPS broadcast / multicast transmissions.

[0015] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE or a component thereof. The apparatus may be configured to receive SPS configuration information for broadcast and / or multicast from a base station, the SPS configuration information indicating a resource set configured for feedback, wherein each TX beam in the transmit (TX) beam set of the base station corresponds to a corresponding subset of the resource set. The apparatus may be further configured to receive SPS signaling from the base station via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set. The apparatus may be further configured to transmit feedback to the base station on one or more subsets corresponding to the one or more TX beams in the resource set, respectively, based on the SPS signaling, the feedback indicating one of an acknowledgment (ACK) or a non-acknowledgement (NACK).

[0016] In a second aspect of the present disclosure, a second method, a second computer-readable medium, and a second device are provided. The second device may be a UE or a component thereof. The second device may be configured to determine whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or downlink control information (DCI) associated with SPS activation or release is not successfully received from a base station. The second device may be further configured to receive a retransmission of at least one of the downlink data or the DCI when it is determined that at least one of the downlink data or the DCI is not successfully received.

[0017] In a third aspect of the present disclosure, a third method, a third computer-readable medium, and a third device are provided. The third device may be a base station or a component thereof. The third device may be configured to configure a resource set to carry feedback, each TX beam in the TX beam set corresponding to a corresponding subset of the resource set. The third device may be further configured to transmit configuration information indicating a resource set to a UE set, the configuration information being associated with an SPS. The third device may be further configured to transmit SPS signaling to the UE set via the TX beam set at each SPS opportunity in the SPS opportunity set. The third device may be further configured to receive feedback from the UE set on one or more subsets in the resource set based on the SPS signaling, wherein the feedback indicates one of an ACK or NACK associated with the SPS signaling.

[0018] In a fourth aspect of the present disclosure, a fourth method, a fourth computer-readable medium, and a fourth device are provided. The fourth device may be a base station or a component thereof. The fourth device may be configured to transmit downlink data to a set of UEs configured with SPS on a downlink data channel on an SPS opportunity set. The fourth device may be further configured to determine whether to retransmit downlink data or at least one of the DCIs associated with SPS activation or release. The fourth device may be further configured to retransmit the downlink data or the at least one of the DCIs when determining to retransmit the downlink data or the DCI.

[0019] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0022] Figure 2Ais a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0023] Figure 2B is a diagram illustrating an example of downlink channels within a subframe according to various aspects of the present disclosure.

[0024] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0025] Figure 2D is a diagram illustrating an example of uplink channels within a subframe according to various aspects of the present disclosure.

[0026] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0027] Figure 4A is a diagram illustrating an example of a wireless communication system.

[0028] Figure 4B It is a commentary Figure 4A A call flow diagram of example operations in a wireless communication system.

[0029] Figure 5A and 5B is a diagram illustrating example communications in a wireless communication system.

[0030] Figure 6 is a diagram illustrating example communications in a wireless communication system.

[0031] Figure 7 is a flow chart of a method for wireless communication by a UE.

[0032] Figure 8 is a flow chart of a method for wireless communication by a UE.

[0033] Fig. 9 is a flow chart of a method for wireless communication by a UE.

[0034] Fig.10 is a flow chart of a method for wireless communication by a UE.

[0035] Fig.11 is a flow chart of a method for performing wireless communication by a base station.

[0036] Fig.12 is a flow chart of a method for performing wireless communication by a base station.

[0037] Fig.13 is a flow chart of a method for performing wireless communication by a base station.

[0038] Fig.14is a flow chart of a method for performing wireless communication by a base station.

[0039] Fig.15 is a conceptual data flow diagram illustrating the flow of data between different devices / components in an example apparatus.

[0040] Fig.16 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system.

[0041] Fig.17 is another conceptual data flow diagram illustrating the flow of data between different devices / components in another example apparatus.

[0042] Fig.18 is a diagram illustrating another example of a hardware implementation for another apparatus employing a processing system.

[0043] Detailed Description

[0044] 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 configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts.

[0045] 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 such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0046] As an 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 configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should 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, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0047] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, each function may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. 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, a combination of computer-readable media of the above types, 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.

[0048] In some access networks and / or wireless communication networks, a base station may include a downlink routing or delivery scheme that allows the base station to control the destination and / or range of downlink information when it is transmitted. Since mobile connectivity is almost ubiquitous in many areas, the cellular cell or coverage area of ​​a base station may typically include a considerable number of user equipment (UE) therein. Although even in the case where the cellular cell includes only two UEs, the base station may preferably control which UE(s) of these UEs receive a given downlink transmission.

[0049] To this end, the base station can configure transmissions to various UEs as unicast, multicast, or broadcast. In a broad sense, unicast is point-to-point communication, so in the context of downlink communications, unicast is a transmission from the base station to the UE. In other words, the scope of a unicast transmission from the base station is one UE, which excludes every other UE that might otherwise be able to receive the transmission signal (for example, if the transmission identifies the corresponding other UE and / or is not unicast).

[0050] However, unicast may have some disadvantages in some instances, such as those in which some UE-invariant or common information is to be delivered to multiple UEs. For example, emergency alert information or other information generally relevant to all UEs in a cell may arrive at or be generated by a base station. As the number of UEs operating in any given cell increases, the overhead (e.g., latency, resource consumption, etc.) commensurate with repeated unicast transmissions of the same information on all base station-to-UE links may increase proportionally. Thus, unicast may be inefficient, if not completely impractical in some instances.

[0051] Functionally the opposite of unicast, broadcast provides an alternative to one-to-many communications. In the context of downlink communications, a broadcast may include a base station connected via a base station cell to all UEs (e.g., although not necessarily in a connected state with the base station). In some aspects, a base station may simultaneously transmit information to each UE within range (and capable of residing or not prohibited). For example, a broadcast address may be reserved in a base station cell or access network, and a base station may address information to the broadcast address so as to broadcast the information and / or the base station may transmit information on a specific broadcast channel, potentially without encryption. Accordingly, a UE connected via a base station cell may receive information addressed to a broadcast address in the cell, and may therefore ascertain the broadcast nature of the information from the broadcast address and / or broadcast channel carrying the information.

[0052] The third destination scheme - multicast - can provide a balance between unicast and broadcast communications. Multicast includes one-to-many communications, which translates to a specified set of UEs from a base station to all UEs connected through the base station cell. In other words, the base station is able to transmit information to a greater number of UEs simultaneously relative to unicast, without arbitrarily transmitting to every potential recipient UE within the base station range. In some aspects, the base station can do so by transmitting information common to the group using addressing information that commonly identifies all UEs in a group of UEs (such as a group network identifier (ID), a logical ID, or another group addressing technique). For example, the base station can schedule certain control information that is common to all UEs in a multicast group, and each UE can receive and decode the same control information on the scheduled resources (such as by using a group ID or other common information shared by each UE in the UE group to descramble the payload carried on the scheduled resources).

[0053] In some instances, the base station may periodically transmit data to the UE on multiple occasions, which may occur over multiple time slots and / or subframes. Some example scenarios where such periodic data transmissions have been or may be applied include mobile gaming, video conferencing or other video calling applications, streaming video, Voice over Internet Protocol (VoIP), or other applications where packets are transmitted to the UE at short and regular intervals (e.g., where the UE or its application tolerates periodic packet bursts). Based on the predictable scheduling of data transmissions, the base station may use semi-persistent scheduling (SPS) to allocate all equivalent resources at once, for example, instead of allocating resources for each periodic data transmission.

[0054] For downlink unicast communications, the base station may configure an SPS for the downlink data channel for the UE, which may be configured per bandwidth part (BWP). Such configuration may configure acknowledgment (ACK) and / or non-acknowledgment or negative acknowledgment (NACK) feedback so that the UE may confirm whether the UE successfully received each unicast transmission. Specifically, the base station may configure feedback on the uplink control channel on specific resources, which may be bound to an ID.

[0055] The base station may communicate with the UE according to the SPS configuration by activating (or "triggering") the SPS configuration. That is, the base station may transmit downlink data to the UE and receive corresponding ACK and / or NACK feedback from the UE when the SPS configuration is activated. In order to activate the SPS configuration, the base station may set the corresponding bit in the downlink control information (DCI), which may include a cyclic redundancy check (CRC) scrambled with a configured scheduling (CS) radio network temporary identifier (RNTI) (CS-RNTI) or a cellular cell RNTI (C-RNTI). The base station may similarly release the SPS configuration - that is, by setting the corresponding bit in the DCI scrambled with the CS-RNTI or C-RNTI.

[0056] Although the base station may be able to configure an SPS for downlink unicast transmission for the UE, there may not be a mechanism for configuring the UE for broadcast or multicast SPS in some access networks or other wireless networks. The present disclosure describes various techniques and methods for SPS configuration for broadcast or multicast, because SPS may be beneficial in broadcast or multicast scenarios. Specifically, configuring SPS for a broadcast or multicast UE group can reduce signaling overhead (such as when multiple UEs are scheduled to receive traffic, the traffic is not UE-specific and is relatively stable or predictable over a fixed time period (for example, in the absence of UE-specific link adaptation)). For SPS broadcast or multicast transmission, the base station can adjust the modulation and coding scheme (MCS), code rate, transmission mode, etc., so that the broadcast or multicast transmission can be received by the UE group at a target block error rate (BLER), even at the edge of the cellular cell.

[0057] When configuring SPS broadcast or multicast, fixed resource allocation can be avoided, which may be inefficient for spectrum usage of a relatively large number of UEs. Specifically, the SPS configuration can be activated by DCI, and the activation DCI can dynamically update the resource allocation of the SPS broadcast or multicast transmission on the downlink data channel. In fact, the activation DCI can dynamically schedule resources like a regular DCI, so fixed resource allocation for broadcast or multicast transmission can be avoided.

[0058] However, before the SPS is configured, the UE may obtain downlink system information from the base station. In a millimeter wave (mmW) system (or near-mmW system), the UE may obtain system information from at least one system information block (SIB) via beam scanning. For example, the UE may use the corresponding synchronization signal block (SSB) and / or channel state information (CSI) reference signal (RS) (CSI-RS) received via each beam in a subset of the entire beam set of the base station for the beam associated with the base station. In the case of beam association, the base station may transmit via some beams (e.g., "active" beams) in the entire beam set, but suppress transmission via some other beams (e.g., "inactive" beams) in the entire beam set. Specifically, the base station may transmit multiple repetitions of the SIB via "active" beams in the entire beam set, and these "active" beams may include a subset of the entire beam set identified by a UE through beam association.

[0059] In order to inform the UE of the active beams in the entire beam set via which the UE can receive repetitions of the SIB, the base station can transmit a bit map to the UE through unicast radio resource control (RRC) signaling. The base station can transmit the bit map together with the system information RNTI (SI-RNTI) to the UE on the downlink control channel. If capable, the UE can correspondingly receive multiple repetitions of the SIB on multiple active beams in order to construct the SIB via beam combining. The SIB transmission performed by the base station can be broadcast and therefore lacks feedback, and therefore combining multiple repetitions of the SIB received by the UE can improve reliability and increase the probability of successful reception by the UE.

[0060] With respect to SPS, a broadcast or multicast transmission should be able to reach a large number of UEs in a large coverage area. To this end, beam sweeping is very important for extending the coverage of a base station, especially in frequency range 2 (FR2) of 5G New Radio (NR). However, if a base station transmits a broadcast or multicast transmission via a beam covering an area where there are no receiving UEs, those associated resources may be wasted, and unnecessary interference may be generated. Therefore, the present disclosure further describes techniques and methods for efficient allocation of resources for SPS broadcast or multicast transmissions.

[0061] Figure 11 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 another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0062] The base station 102 configured for 4G Long Term Evolution (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 first backhaul link 132 (e.g., an S1 interface). The base station 102 configured for 5G NR, collectively referred to as the Next Generation RAN (NG-RAN), can interface with the core network 190 via a second backhaul link 184. The base station 102 can also perform one or more of the following functions, among other functions: delivery 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), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages.

[0063] The base stations 102 may communicate with each other directly or indirectly (e.g., via the EPC 160 or the core network 190) on a third backhaul link 134 (e.g., an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless. At least some of the base stations 102 may be configured for integrated access and backhaul (IAB). Therefore, such base stations may communicate wirelessly with other such base stations. For example, at least some of the base stations 102 configured for IAB may have a split architecture, which includes at least one of a central unit (CU), a distributed unit (DU), a radio unit (RU), a remote radio head (RRH), and / or a remote unit, some or all of which may be co-located or distributed and / or may communicate with each other. In some configurations of such a split architecture, the CU may implement some or all of the functionality of the radio resource control (RRC) layer, and the DU may implement some or all of the functionality of the radio link control (RLC) layer. Illustratively, some base stations 102 configured for IAB may communicate with a parent's DU through a corresponding CU, and further, may communicate with child IAB nodes (e.g., other base stations) and / or one or more UEs 104 through a corresponding DU. One or more base stations 102 configured for IAB may be an IAB donor connected to at least one of the EPC 160 and / or the core network 190 through a CU. By doing so, the base station(s) 102 operating as the IAB donor(s) may provide a link to one of the EPC 160 and / or the core network 190 for other IAB nodes (which may be direct or indirect (e.g., separated from the IAB donor by more than one hop)) and / or one or more UEs 104 (both of which may communicate with the DU(s) of the IAB donor(s)). In some additional aspects, one or more base stations 102 may be configured with connectivity in an open RAN (ORAN) and / or a virtualized RAN (VRAN), which may be achieved through at least one corresponding CU, DU, RU, RRH, and / or remote unit.

[0064] Base stations 102 may communicate wirelessly with UEs 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be over one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y megahertz (MHz) (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth for each carrier allocated in a carrier aggregation of up to Yx MHz or x component carriers (CCs) for transmission in each direction. These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to downlink and uplink (e.g., more or fewer carriers may be allocated to the downlink compared to the uplink). The CC may include a primary CC and one or more secondary CCs. The primary CC may be referred to as a primary cell (PCell) and the secondary CC may be referred to as a secondary cell (SCell).

[0065] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use a downlink / uplink 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). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0066] The wireless communication system may further include a Wi-Fi access point (AP) 150 in communication with a Wi-Fi station (STA) 152 via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0067] 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 unlicensed spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0068] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0069] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this article, the term "sub-6 GHz" and the like can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this article, the term "millimeter wave" and the like can broadly represent frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0070] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include and / or be referred to as an eNB, a gB node (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 frequencies, and / or near millimeter wave frequencies to communicate with UE 104. When gNB 180 operates in millimeter wave frequencies or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0071] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0072] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, an MBMS gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication 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. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered 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 IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a packet switched (PS) streaming (PSS) service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS related charging information.

[0073] 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. AMF 192 may be in communication with a unified data management (UDM) 196. AMF 192 is a control node that processes signaling between UE 104 and the core network 190. In general, AMF 192 provides quality of service (QoS) flows and session management. All user IP packets are delivered through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 191. IP services 191 may include the Internet, intranet, IMS, PS streaming services, and / or other IP services.

[0074] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point to the EPC 160 or the core network 190 for the 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 (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, 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.

[0075] Reference again Figure 1 In certain aspects, the base station 102 / 180 may configure a resource set to carry feedback, wherein each TX beam in a transmit (TX) beam set corresponds to a respective subset of the resource set. The base station 102 / 180 may be further configured to transmit configuration information indicating the resource set to a set of UEs (including the first UE 104) configured with multicast SPS. The base station 102 / 180 may be further configured to transmit SPS signaling to the set of UEs (including UE 104) via the TX beam set at each SPS opportunity in the set of SPS opportunities. The base station 102 / 180 may be further configured to receive feedback 197 from the set of UEs (including UE 104) on one or more subsets in the resource set based on the SPS signaling, wherein the feedback 197 indicates one of an ACK or a NACK associated with the SPS signaling on the subset in the set of SPS opportunities.

[0076] Correspondingly, UE 104 may be configured to receive SPS configuration information for broadcast and / or multicast from base station 102 / 180, the SPS configuration information indicating a resource set configured for feedback, wherein each TX beam in the TX beam set of the base station 102 / 180 corresponds to a corresponding subset of the resource set. UE 104 may be further configured to receive SPS signaling from base station 102 / 180 via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set. UE 104 may be further configured to transmit feedback 197 to base station 102 / 180 on one or more subsets in the resource set corresponding to the one or more TX beams, respectively, based on the SPS signaling, wherein the feedback 197 indicates one of ACK or NACK associated with the SPS signaling.

[0077] In certain further aspects, the base station 102 / 180 may be configured to transmit a first set of signals to a set of UEs (including UE 104) via a TX beam set on a downlink data channel. The base station 102 / 180 may be further configured to determine a TX beam subset from the TX beam set based on a set of response signals received from the set of UEs including UE 104 on one or more subsets in a resource set on an uplink channel, wherein each response signal in the set of response signals indicates a TX beam in the TX beam subset. The base station 102 / 180 may be further configured to transmit data 198 to the set of UEs (including UE 104) via the TX beam subset on the downlink data channel. For example, the base station 102 / 180 may configure transmission of the data 198 according to the SPS, for example, so that the data 198 is transmitted on each SPS opportunity in the SPS opportunity set. In some aspects, the data configured to be transmitted according to the SPS may be referred to as "SPS data".

[0078] Correspondingly, UE 104 may be configured to receive a first signal set from base station 102 / 180 on a downlink data channel via a TX beam set of base station 102 / 180. UE 104 may be further configured to determine a TX beam subset from the TX beam set based on the first signal set received via one or more TX beams. UE 104 may be further configured to transmit a response signal set indicating the TX beam subset on an uplink channel. UE 104 may be further configured to receive SPS data 198 from base station 102 / 180 on a downlink data channel via the TX beam subset.

[0079] In certain further aspects, the base station 102 / 180 may be configured to transmit downlink data on a downlink data channel to a set of UEs configured with SPS (including UE 104) on a set of SPS opportunities. The base station 102 / 180 may be further configured to determine whether to retransmit at least one of the downlink data or the DCI associated with the SPS activation or release. The base station 102 / 180 may be further configured to retransmit the at least one of the downlink data or the DCI upon determining that the at least one of the downlink data or the DCI is to be retransmitted.

[0080] Correspondingly, UE 104 may be configured to determine whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or SPS activation or release for a multicast group indicated by a DCI associated with SPS activation or release is not successfully received from base station 102 / 180. UE 104 may be further configured to receive a retransmission 199 of at least one of the downlink data or DCI when determining that at least one of the downlink data or DCI is not successfully received.

[0081] Various other aspects related to SPS broadcast or multicast configuration and communication between base stations and UEs. The present disclosure describes some concepts and various aspects in the context of base stations and multicast UE groups that can be configured with SPS. However, it should be appreciated that the context examples of the present disclosure are intended to be illustrative rather than restrictive. The present disclosure describes these concepts and various aspects in a manner sufficient for application implementation in other related fields, such as in IAB networks and IAB communications configured for SPS and / or multicast and / or broadcast. In an example of an IAB network that implements some of the concepts described herein, some sub-base stations configured for IAB can communicate with DUs of a parent node or IAB donor node via corresponding CUs. Such sub-base stations can implement some multicast and / or SPS concepts and aspects described with respect to UEs (e.g., via CU functionality), such as Figures 4A to 18 Accordingly, the parent node and / or IAB donor may implement some of the multicast and / or SPS concepts and aspects described with respect to the base station (eg, via DU functionality), such as Figures 4A to 18 Further described in .

[0082] Although the present disclosure may focus on 5G NR, the concepts and aspects described herein may be applicable to other similar areas such as LTE, Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), or other wireless / radio access technologies.

[0083] Figure 2A 200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2Bis a diagram 230 illustrating an example of downlink channels within a 5G NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D 280 is a diagram illustrating an example of an uplink channel within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), the subframes within the subcarrier set are dedicated to either the downlink or the uplink; or can be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), the subframes within the subcarrier set are dedicated to both the downlink and the uplink. Figure 2A , 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly downlink) and subframe 3 is configured with slot format 34 (mostly uplink), where D is downlink, U is uplink, and F is for flexible use between downlink / uplink. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full downlink and full uplink, respectively. Other slot formats 2-61 include a mix of downlink, uplink, and flexible symbols. The UE is configured with a slot format (dynamically configured by DCI, or semi-statically / statically configured by RRC signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G NR frame structure for TDD.

[0084] Other wireless communication technologies may have different frame structures and / or different channels. A frame (e.g., a 10 millisecond (ms) frame) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include a mini-time slot, 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 downlink may be cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the uplink 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 parameter design. For slot configuration 0, different parameter designs μ of 0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ *15 kilohertz (kHz), where μ is parameter design 0 to 4. Thus, parameter design μ=0 has a subcarrier spacing of 15 kHz, while parameter design μ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A to 2D An example of a slot configuration 0 with 14 symbols per slot and a parameter design μ=2 with 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 microseconds (μs). Within a frame set, there may be one or more different BWPs that are frequency division multiplexed (see Figure 2B ). Each BWP may have a specific parameter design.

[0085] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0086] like Figure 2A As illustrated in FIG. 1 , some REs carry at least one pilot and / or RS for the UE. In some configurations, the RS may include at least one demodulation RS (DM-RS) (indicated as R for a particular configuration) for channel estimation at the UE. x, where 100x is the port number, but other DM-RS configurations are possible) and / or at least one CSI-RS. In some other configurations, the RS may additionally or alternatively include at least one beam measurement (or management) RS (BRS), at least one beam refinement RS (BRRS) and / or at least one phase tracking RS (PT-RS).

[0087] Figure 2B Examples of various downlink channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including 9 RE groups (REGs), each REG including 4 consecutive REs in an OFDM symbol. A PDCCH within a BWP may be referred to as a control resource set (CORESET). Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE may determine the physical cell identifier (PCI). Based on the PCI, the UE may determine the location 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 (also referred to as an SSB). 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 transmitted over the PBCH (such as SIBs), and paging messages.

[0088] As in Figure 2C As explained in , some REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS 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 or first 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. The UE may transmit a sounding reference signal (SRS). The SRS may be transmitted in the last symbol of the subframe. The SRS may have a comb structure, and the UE may transmit the SRS on one of the comb teeth. The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the uplink.

[0089] Figure 2D Examples of various uplink channels within a subframe of a frame are illustrated. The PUCCH may be located at a location as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as a scheduling request (SR), a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and hybrid automatic repeat request (HARQ) ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0090] Figure 3 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the downlink, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of 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 of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and switching support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0091] The TX processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 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-quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together 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 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from reference signals and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0092] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). 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 signal constellation point most likely transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0093] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the uplink, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0094] Similar to the functionality described in conjunction with downlink transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery 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 functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0095] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0096] The uplink transmission is processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0097] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the uplink, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0098] In some aspects, at least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to those performed by Figure 1 Aspects of at least one of feedback 197, SPS data 198, and / or retransmissions 199 are described.

[0099] In some other aspects, at least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to those performed by Figure 1 Various aspects of the feedback 197, SPS data 198 and / or retransmission 199 combinations are explained.

[0100] Figure 4A and 4B An example wireless communication system 400 including a base station 402 and a set of UEs 404a-c, and example operations 450 by the base station 402 and the set of UEs 404a-c in the example wireless communication system 400 are illustrated. According to various aspects, the UEs 404a-c can be used and / or can be considered as a group, such as a multicast group configured to receive some common signaling or common information. For example, the UEs 404a-c can each be configured to monitor the same resources on the PDCCH, such as the same CORESET on the PDCCH, and further, the UEs 404a-c can receive and decode the same DCI (e.g., such as Figure 2B ). The DCI common to all UEs 404a-c in the group may include a multicast DCI indicating an SPS activation or release associated with a set of SPS opportunities or other SPS schedules common to the group of UEs 404a-c.

[0101] A group of UEs 404a-c may be formed or configured. For example, the base station 402 may configure the set of UEs 404a-c as a group for broadcast and / or multicast (hereinafter referred to as "broadcast or multicast"). In addition, the base station 402 may configure SPS for the set of UEs 404a-c. Thus, the base station 402 and the UEs 404a-c may communicate broadcast or multicast SPS transmissions, which may be triggered and / or released by the base station 402 using DCI.

[0102] In order to configure SPS for UE 404a-c, base station 402 may transmit SPS configuration information 422 to UE 404a-c. In some aspects, SPS configuration information 422 may be used for broadcast and / or multicast, such as SPS configuration information addressed to UE 404a-c in a multicast group. For example, SPS configuration information 422 may be based on a common resource of a multicast group for UE 404a-c. Common resources may include resources allocated to all UEs in the multicast group of UE 404a-c. For example, in a downlink, common resources may include resources on which multicast transmissions may be found or scheduled otherwise. Each UE in a multicast group of UE 404a-c may receive and decode information carried on such downlink common resources. For example, on an uplink, common resources may include resources allocated to any or all UEs in a multicast group of UE 404a-c. Therefore, such resources may not be UE-specific; however, such resources may be beam-specific.

[0103] In some aspects, the SPS configuration information 422 may include at least one message that implements a group addressing mechanism that may be used by the base station 402 for multicasting. In some configurations, the base station 402 may address at least one message of the SPS configuration information 422 to at least one address that collectively identifies a group that includes the UEs 404a-c, which may or may not (implicitly) identify each of the individual UEs 404a-c. For example, each of the UEs 404a-c in the group may be associated with a radio network ID or an RNTI (e.g., a group radio network ID or group RNTI (G-RNTI)) via which the UEs 404a-c included in a group may be addressed. However, in some other configurations, another approach to group addressing may be employed, for example, each group member may be addressed in a multicast message by individually identifying each member of the multicast group using a corresponding unique ID corresponding to each UE in the group of UEs 404a-c, and each group member may be divided into subgroups, each of which is addressed by a corresponding subgroup address, either individually or in combination with a more comprehensive group address.

[0104] Illustratively, the mechanism for group addressing may include a portion of the message dedicated to or configurable as a group addressing field, or other message portions that enable multicast group members to identify group addressing information for the multicast group, the message portion including a header, such as a field or subfield of a header or subheader, a MAC CE, or another packetized structure (e.g., a PDU or SDU) in which the base station 402 may include the multicast group address. The SPS configuration information 422 may be separated on a message set. For example, the base station 402 may transmit a portion of the SPS configuration information 422 in at least one of a SIB (broadcast RRC) and / or at least one other unicast RRC that may be carried on a downlink data channel (e.g., PDSCH) and / or at least one DCI message that may be carried on a downlink control channel (PDCCH). In some aspects, a portion of the SPS configuration information 422 may be transmitted on a multicast control channel (MCCH), which may be a logical channel for multicast control information and may be carried on resources of a downlink data channel (e.g., PDSCH).

[0105] Potentially, the SPS configuration information 422 may activate a broadcast or multicast SPS transmission, which may indicate to the UEs 404a-c that an SPS transmission is imminent based on the resources configured for the SPS. For example, the SIB may include an SPS configuration for the MCCH, and an activation / release DCI with a CRC scrambled by the RNTI for the SPS MCCH may be used to trigger the on / off of SPS transmissions of the MCCH on the PDSCH. The MCCH may include an SPS configuration for a multicast traffic channel (MTCH), and an activation / release DCI with a CRC scrambled by the RNTI for the SPS MTCH may be used to trigger the on / off of SPS transmissions of the MTCH on the PDSCH.

[0106] The SPS configuration information 422 may indicate resource allocations for broadcast or multicast SPS transmissions. The SPS configuration information 422 may indicate resource allocations in the frequency domain, such as channels and / or BWPs in which SPS transmissions may be transmitted. In addition, the SPS configuration information 422 may indicate resource allocations in the time domain, such as periodicity with which SPS opportunities including SPS transmissions may occur. For example, the SPS opportunity may include one or more of the SFNs, subframes, and / or time slots in which the base station 402 may transmit SPS transmissions, and the SPS opportunity may be indicated as a number, index, and / or offset corresponding to the SFN, subframe, and / or time slot.

[0107] The broadcast or multicast transmission by the base station 402 may be subject to some QoS parameters (e.g., QoS parameters established according to 5GNR). In order to meet those QoS parameters, ACK / NACK feedback may be configured by the base station 402 for SPS transmission. Therefore, the SPS configuration information 422 may further configure a feedback resource set on which the UE 404a-c may transmit ACK / NACK feedback to the base station 402. The feedback resource set may be configured on an uplink channel, such as an uplink control channel (e.g., PUCCH).

[0108] The base station 402 and the UEs 404a-c may communicate via beamforming. Since a broadcast or multicast transmission potentially may need to reach a large number of UEs, some of which may be close to the cell edge of the base station 402, the base station 402 may perform beam sweeping to extend the coverage area of ​​the base station 402. The base station 402 may sweep through the available set of beams 410a-d to cover the UEs 404a-c.

[0109] The UEs 404a-c may identify at least a portion of the available beam sets 410a-d of the base station 402 through beam association because the corresponding SSBs and / or CSI-RSs may be quasi-co-located with the SPS transmission.

[0110] Using beam sweeping, SPS transmission of MCCH and / or MTCH may be repeated in multiple beams, and the number of beams and beam directions for MCCH and MTCH may be different.

[0111] Downlink transmissions by the base station 402 may consume resources and potentially introduce interference to other systems and devices (e.g., neighboring base stations, UEs near cell edges, etc.). Therefore, the base station 402 may be configured to transmit broadcast or multicast SPS transmissions via an active beam set (which may be a subset of the available beam sets 410a-d), but refrain from transmitting via an inactive beam set (which may be a subset of the available beam sets 410a-d including those beams excluded from the active beam set).

[0112] The base station 402 may determine the active beam set so that the base station 402 may allocate resources efficiently and, additionally, so that the base station 402 may mitigate interference caused to nearby systems and devices. However, the base station 402 may rely on measurement reports and / or feedback provided by the UEs 404a-c to identify which beams in the available beam sets 410a-d should be included in the active beam set. To this end, the base station 402 may transmit a first SPS signal set 424 to the UEs 404a-c via the available beam sets 410a-d.

[0113] In some aspects, the first SPS signal set 424 may include data and / or control information that may be carried on a downlink data channel (e.g., PDSCH). In some other aspects, the first SPS signal set 424 may include SSBs, CSI-RS, and / or other reference signals on which the UE 404a-c may perform measurements. In yet further aspects, a portion of the first SPS signal set 424 may be transmitted via RRC signaling.

[0114] Each of the UEs 404a-c may receive a respective subset of the first set of SPS signals 424 transmitted via a respective subset of the available beam sets 410a-d covering the area in which each of the UEs 404a-c is located. For example, the first UE 404a may receive a respective subset of the first set of SPS signals 424 via the first beam 410a, and similarly, the third UE 404c may receive a respective subset of the first set of SPS signals 424 via the fourth beam 410d. The second UE 404b may be covered by both beams 410c-d, which may allow the second UE 404b to receive transmissions on both beams 410c-d, for example, so that the second UE 404b may perform beam combining to improve signal quality and / or reliability.

[0115] Each of the UEs 404a-c may determine a first subset of the available beam sets 410a-d based on the first SPS signal set 424. Thus, each of the UEs 404a-c may select one or more beams of the beams 410a-d that cover each of the UEs 404a-c. For example, the first UE 404a may determine a first subset of the available beam sets 410a-d by selecting the first beam 410a, the second UE 404b may determine a first subset by selecting the third and fourth beams 410c-d, and the third UE 404c may determine a first subset by selecting the fourth beam 410d.

[0116] Each of the UEs 404a-c may be configured to transmit a respective one of the response signals 426a-c indicating a respective first subset of the available beam sets 410a-d to the base station 402 on an uplink channel. According to a first aspect, the beam selection by the UEs 404a-c may be opaque to the base station 402. In such aspects, the base station 402 may track beam monitoring for all UEs 404a-c configured in a broadcast or multicast group. The base station 402 may configure each of the UEs 404a-c with at least one UE-specific feedback resource on an uplink channel (e.g., an uplink control channel such as a PUCCH).

[0117] Further to the first aspect, each of the UEs 404a-c may receive configuration information indicating UE-specific feedback resources on an uplink channel from the base station 402. Thus, each of the UEs 404a-c may be able to transmit information indicating a corresponding first beam subset selected by each of the UEs 404a-c on the respectively configured UE-specific feedback resources. Potentially, each of the UEs 404a-c may perform measurements on those first SPS signals 424 received by each of the UEs 404a-c, such as measurements of reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-noise ratio (SNR), reference signal strength indicator (RSSI), and / or other measurements. For example, the first UE 404a may perform measurements on those first SPS signals 424 received via the first beam 410a. Each of the UEs 404a-c may then transmit measurement information associated with the respective first subset of the available beam sets 410a-d selected by each of the UEs 404a-c to the base station on the respectively configured UE-specific feedback resources on the uplink channel.

[0118] The base station 402 may receive response signals 426a-c from the UEs 404a-c on the UE-specific feedback resources configured on the uplink channel, and each of the response signals 426a-c may indicate at least one beam. The base station 402 may then determine an active beam set in the available beam sets 410a-d based on the response signals 426a-c. For example, the base station 402 may determine the active beam set based on measurements reported by the UEs 404a-c for each of the first beam 410a, the third beam 410c, and the fourth beam 410d via which the UEs 404a-c received at least one of the first SPS signals 424. Based on the response signals 426a-c, the base station 402 may determine the active beam set to include the first beam 410a, the third beam 410c, and the fourth beam 410d, but exclude the second beam 410b.

[0119] According to a second aspect, the beam selection by the UE 404a-c can be transparent to the base station 402. To determine the active beam set, the base station 402 does not necessarily need to know which UE among the UEs 404a-c is covered by which beam among the available beams 410a-d; instead, the base station 402 can determine the active beam set as long as the base station 402 is notified that at least one UE among the UEs 404a-c is covered by one of the available beams 410a-d to be included in the active beam set. In such an aspect, the base station 402 can configure each beam-specific feedback resource in the beam-specific feedback resource set on the uplink channel for the corresponding one of the available beam sets 410a-d.

[0120] Illustratively, the base station 402 may configure a first feedback resource on an uplink channel for the first beam 410a, a second feedback resource on an uplink channel for the second beam 410b, a third feedback resource on an uplink channel for the third beam 410c, and a fourth feedback resource on an uplink channel for the fourth beam 410d. In other words, the base station 402 may configure shared resources on an uplink channel for the UEs 404a-c to use to transmit response signals 426a-c indicating feedback for those available beams 410a-d to be included in the active beam set.

[0121] Further to the second aspect, each of the UEs 404a-c may receive configuration information indicating a set of beam-specific feedback resources on an uplink channel for a corresponding beam in the set of available beams 410a-d. Each of the UEs 404a-c may then transmit one of the response signals 426a-c on the beam-specific feedback resources corresponding to one of the available beams 410a-d via which each of the UEs 404a-c received one of the first SPS signals 424. For example, the second UE 404b may transmit two of the response signals 426a-c on the third and fourth beam-specific feedback resources corresponding to the third and fourth beams 410c-d via which the second UE 404b received the first SPS signal 424.

[0122] In one option of the second aspect, if at least one of the UEs 404a-c detects a reference signal (e.g., SSB, CSI-RS, and / or DM-RS) received via a corresponding beam in the available beams 410a-d, the at least one of the UEs 404a-c may transmit a corresponding one of the response signals 426a-c on the beam-specific feedback resources. For example, the first UE 404a may determine a corresponding energy (or received power) corresponding to each of the first SPS signals 424 received via one or more of the available beams 410a-d.

[0123] The first UE 404a may compare each of the corresponding energies with an energy detection threshold. If the energy corresponding to one of the first SPS signals 424 received via one of the available beams 410a-d satisfies (e.g., reaches or exceeds) the energy detection threshold, the first UE 404a may transmit a response signal 426a on a beam-specific resource corresponding to the one of the available beams 410a-d via which the first SPS signal 424 whose corresponding energy satisfies the energy detection threshold is detected.

[0124] In a second option of the second aspect, the first SPS signal 424 may include at least a control signal on the MCCH carried in a downlink data channel (e.g., PDSCH); however, the base station 402 may refrain from transmitting any data on a multicast traffic channel (MTCH) in the downlink data channel (e.g., when the base station 402 transmits the first SPS signal 424 for a beam selection procedure that is transparent to the base station 402). The control signal may include any control information that each of the UEs 404a-c is capable of successfully receiving and decoding.

[0125] Each of the UEs 404a-c may detect a control signal carried on the MCCH via one of the available beam sets 410a-d. When each of the UEs 404a-c successfully detects a control signal on the MCCH in the downlink data channel via one of the available beams 410a-d, each of the UEs 404a-c may generate a respective ACK signal corresponding to the respective control signal received via the respective one of the available beams 410a-d. Each of the UEs 404a-c may then transmit a respective one of the response signals 426a-c indicating the ACK signal on a beam-specific feedback resource corresponding to the respective one of the beams 410a-d via which the control signal was received.

[0126] Illustratively, the second UE 404b may successfully receive the first control signal on the MCCH in the downlink data channel via the third beam 410c, and further, may successfully receive the second control signal on the MCCH in the downlink data channel via the fourth beam 410d. Based on successfully receiving the first and second control signals via the third and fourth beams 410c-d, respectively, the second UE 404b may transmit a response signal 426b indicating an ACK signal on beam-specific feedback resources corresponding to the third and fourth beams 410c-d.

[0127] Similarly, the first UE 404a may transmit a response signal 426a indicating an ACK signal on a beam-specific feedback resource corresponding to the first beam 410a. The base station 402 may receive the response signals 426a-b from the first and second UEs 404a-b and may determine that the first, third, and fourth beams 410a, 410c-d should be included in the active beam set because there are UEs within the coverage areas of those beams that are able to successfully receive downlink transmissions, as indicated by the ACK signals.

[0128] However, if UE 404a-c fails to receive the control signal via one of the available beams 410a-d, UE 404a-c may refrain from transmitting any response signal to base station 402. Specifically, each of UEs 404a-c may refrain from transmitting NACK feedback (e.g., in response to receiving a control signal via one of the available beams 410a-d that was not successfully decoded and / or was received with a large amount of interfering signals).

[0129] When the base station 402 fails to receive any response signal indicating an ACK signal on the beam-specific feedback resource corresponding to one of the available beams 410a-d, the base station 402 may determine that no UE is within the coverage area of ​​one of the available beams 410a-d, and thus the base station 402 may exclude that beam from the active beam set. For example, the base station 402 may exclude the second beam 410b from the active beam set because the base station 402 may fail to receive any response signal indicating an ACK signal on the beam-specific feedback resource configured for the second beam 410b.

[0130] In some aspects, the aforementioned first and second options of the second aspect may be configurable and / or may be implemented together. For example, the energy detection threshold may be configurable. In another example, the type of reference signal and / or control signal on which the UE 404a-c determines whether to transmit the response signal 426a-c on the feedback resource that varies by beam may be configurable. That is, the base station 402 may configure the UE 404a-c to use CSI-RS or DM-RS as a reference signal, and / or may configure the UE 404a-c to use transmission on a specific resource set in the MCCH as a control signal.

[0131] The base station 402 may dynamically configure beam activation and deactivation (e.g., deactivation may include deactivation) for broadcast or multicast SPS communications. The base station 402 may transmit information associated with the available beams 410a-d to the UEs 404a-c, for example, to enable the UEs 404a-c to provide measurements and / or other reports associated with the available beams 410a-d to the base station 402. Thus, the base station 402 may activate and / or deactivate beams in the available beams 410a-d based on measurement reports and / or other feedback that vary from UE to UE. Specifically, the base station 402 may deactivate beams in the available beams 410a-d through which no UE will receive broadcast or multicast data, for example, because no UE within a group configured for broadcast or multicast SPS may be within the coverage area of ​​such beams.

[0132] In a first aspect of beam activation or deactivation, the beam activation or deactivation configured by the base station 402 may be opaque to the UEs 404a-c. In such aspects, the base station 402 may include some signaling in the SPS configuration information 422 to indicate which of the available beams 410a-d are activated, and some signaling to indicate which of the available beams 410a-d are deactivated. The base station 402 may transmit the signaling indicating which of the available beams 410a-d are activated and / or deactivated via RRC signaling, via the SIB, and / or the MCCH in a downlink data channel (e.g., PDSCH).

[0133] In some aspects, the signaling to indicate which beam of the available beams 410a-d is activated and / or deactivated may include a bitmap. The size of the bitmap is equal to the total number of available beams, where the total number of available beams may be predefined / configured by the RRC for MCCH and subsequently predefined / configured by the MCCH for MTCH, or alternatively predefined / configured by the RRC for both MCCH and MTCH. The base station 402 may generate the bitmap to include respective bits corresponding to each of the available beams 410a-d and / or respective transmission configuration indicator (TCI) states that may be associated with each of the available beams 410a-d, and / or respective quasi co-location (QCL) information. The base station 402 may insert a "1" in each bit corresponding to an activated beam in the available beams 410a-d (e.g., those beams in the available beams 410a-d that are included in the active beam set), but may insert a "0" in each bit corresponding to a deactivated beam in the available beams 410a-d. A special case is that each beam used for multicast is associated with an SSB. Thus, the bitmap of the SSB may be used to implicitly indicate beam activation or deactivation for control and / or data for broadcast or multicast transmissions. In some aspects, the bitmap of the SSB may be indicated by unicast RRC signaling, while in other aspects, the bitmap of the SSB may be indicated by broadcast or multicast signaling.

[0134] Illustratively, the first, third, and fourth beams 410a, 410c-d may be activated and included in the active beam set (e.g., because at least one of the UEs 404a-c is within the coverage area of ​​each of those beams); however, the second beam 410b may be deactivated and excluded from the active beam set (e.g., because no UEs 404a-c are within the coverage area of ​​the second beam 410b). Accordingly, the base station 402 may generate a bitmap in which a first bit at a first position corresponds to the first beam 410a and / or the associated first TCI state and / or the associated first QCL information, a second bit at a second position (e.g., the next consecutive position) corresponds to the second beam 410b and / or the associated second TCI state and / or the associated second QCL information, a third bit at a third position (e.g., the position consecutively following the second position) corresponds to the third beam 410c and / or the associated third TCI state and / or the associated third QCL information, and a fourth bit at a fourth position (e.g., the position consecutively following the third position) corresponds to the fourth beam 410d and / or the associated fourth TCI state and / or the associated fourth QCL information. Thus, the base station 402 may generate a bitmap indicating "1011" to indicate that the first, third, and fourth beams 410a, 410c-d are included in the active beam set, but the second beam 410b is excluded from the active beam set.

[0135] Each of the UEs 404a-c may receive a bitmap from the base station 402. One or more of the UEs 404a-c may use the bitmap information indicating the active beam set to determine (e.g., calculate) a corresponding feedback resource on an uplink channel (e.g., PUCCH) on which each of the UEs 404a-c will transmit a corresponding one of the response signals 426a-c. Each of the UEs 404a-c may perform measurements and / or determine other feedback (e.g., ACK / NACK feedback) based on a first SPS signal 424 received by each of the UEs 404a-c on a corresponding subset of the available beams 410a-c. The first SPS signal 424 may include, for example, at least one SPS transmission on at least one SPS opportunity, such as SPS data and / or control information on the MTCH and / or MCCH, respectively, and it may include one or more reference signals. Each of the UEs 404a-c may include corresponding measurements, feedback, and / or other reports in a corresponding one of the response signals 426a-c. Each of the UEs 404a-c may then transmit a respective one of the response signals 426a-c to the base station 402 on the respective feedback resources.

[0136] The base station 402 may receive the response signal 426 on the feedback resource, and the base station 402 may dynamically determine which beams of the available beams 410a-d to include in the active beam set and / or which beams of the available beams 410a-d to deactivate based on the response signal 426. The base station 402 may transmit a second SPS signal 428 to the UE 404a-c via each beam in the active beam set on a downlink data channel, for example, at one SPS opportunity in the SPS opportunity set. The second SPS signal 428 may include broadcast or multicast data and / or control information—for example, data may be carried on the MTCH in the downlink data channel and control information may be carried on the MCCH in the downlink data channel.

[0137] Accordingly, UE 404a-c may, for example, receive a second SPS signal 428 on a downlink data channel via at least one beam in an active beam set at an SPS opportunity in an SPS opportunity set. Potentially, one or more UEs (e.g., second UE 404b) in UE 404a-c may use bit mapping to receive multiple repetitions of the second SPS signal 428 on multiple active beams to construct an SPS transmission via beam combining. For example, the activation of the third and fourth beams 410c-d may be notified to the second UE 404b via bit mapping, both of which at least partially cover the second UE 404b. The second UE 404b may combine multiple repetitions of the second SPS signal 428 received by the second UE 404b on the third and fourth beams 410c-d to reconstruct the second SPS signal 428, which may improve reliability and increase the probability of successful reception by the second UE 404b.

[0138] In a second aspect of beam activation or deactivation, the beam activation or deactivation configured by the base station 402 can be transparent to the UE 404a-c. In such aspects, the base station 402 can refrain from informing the UE 404a-c which beams of the available beams 410a-d are included in the active beam set and which beams of the available beams 410a-d are excluded from the active beam set. However, the base station 402 can transmit information indicating the total number of available beams 410a-d to the UE 404a-c, for example in the SPS configuration information 422. The base station 402 can transmit signaling to indicate the total number of available beams 410a-d via unicast RRC signaling, via SIB for MCCH and / or MTCH, and / or via MCCH in a downlink data channel (e.g., PDSCH) for MTCH. Alternatively, the total number of available beams can be predefined for MCCH and / or MTCH.

[0139] Illustratively, the base station 402 may notify the UEs 404a-c that the base station 402 is configured with a total of four available beams 410a-d (and / or TCI states and / or QCL information). However, the base station 402 may refrain from notifying the UEs 404a-c that the base station 402 is configured with the first, third, and fourth beams 410a, 410c-d as activated (and included in the active beam set), and is configured with the second beam as deactivated (and excluded from the active beam set).

[0140] UEs 404a-c may receive information indicating a total number of available beams 410a-d from base station 402. Each of UEs 404a-c may determine a respective feedback resource allocation on an uplink channel based on the total number of available beams 410a-d (e.g., using a predefined resource allocation rule that takes into account the total number of available beams for base station 402). Each of UEs 404a-c may then transmit a respective one of response signals 426a-c to base station 402 on the respective feedback resources.

[0141] In some potential scenarios, one or more UEs in UE 404a-c may fail to receive an SPS transmission, such as a first SPS signal 424, from base station 402. In such potential scenarios, base station 402 may be configured to retransmit an SPS signal (e.g., broadcast or multicast data and / or control information). Base station 402 may retransmit an SPS signal based on feedback from UE 404a-c (such as NACK feedback) and / or based on the absence of feedback from UE 404a-c (such as the absence of ACK feedback). However, retransmitting an SPS signal via all beams in an active beam set may consume unnecessary resources and / or may introduce interference to neighboring systems and devices. Therefore, base station 402 may be configured to manage separate beams for initial transmission and retransmission of SPS signaling.

[0142] Individual beam management for initial transmission and retransmission of SPS signaling can be based on different feedback configurations for UE 404a-c. In some aspects, beam-specific group ACK can be configured for initial transmission of SPS signaling. That is, for initial transmission, base station 402 can configure each beam-specific ACK resource in a beam-specific ACK resource set on an uplink channel (e.g., PUCCH) for a corresponding beam in an active beam set (which may include the first, third, and fourth beams 410a, 410c-d). Each UE in UE 404a-c can receive SPS configuration information 422 indicating a beam-specific ACK resource set on an uplink channel for a corresponding beam in an active beam set included in available beams 410a-d.

[0143] Thus, for an initial transmission of SPS signaling (e.g., the first SPS signal 424), the UE 404a-c may transmit response signals 426a-c indicating ACK feedback on beam-specific ACK resources corresponding to those beams in the active beam set via which the UE 404a-c was able to successfully receive the first SPS signal 424. In some aspects, the second UE 404b may be able to transmit more than one response signal 426b on more than one beam-specific ACK resource (e.g., because the second UE 404b may be configured for beam combining when covered by the third and fourth beams 410c-d in the active beam set).

[0144] Illustratively, the first and second UEs 404a-b may successfully receive the first SPS signal 424 via the first, third, and fourth beams 410a, 410c-d in the active beam set. Therefore, the base station 402 may receive a response signal 426a-b indicating ACK feedback on the beam-specific ACK resources corresponding to the first, third, and fourth beams 410a, 410c-d, and the base station 402 may determine that the first SPS signal 424 is successfully received via the first, third, and fourth beams 410a, 410c-d. However, the third UE 404c may fail to successfully receive the first SPS signal 424 via the fourth beam 410d in the active beam set.

[0145] For retransmission of SPS signaling, a beam-specific group NACK may be used. That is, the base station 402 may configure each beam-specific NACK resource in a beam-specific NACK resource set on an uplink channel (e.g., PUCCH) for the corresponding beam in the active beam set. The beam-specific NACK resource set may be different from the beam-specific ACK resource set (e.g., different resources, different periodicity) and may be triggered by a flag in a DCI with a different RNTI or a DCI with the same RNTI. The UE 404a-c may receive SPS configuration information 422 indicating each beam-specific NACK resource in a beam-specific NACK resource set for the corresponding beam in the active beam set on an uplink channel. Each of the UEs 404a-c may be allowed to select one of the beam-specific NACK resources such that each of the UEs 404a-c may select a subset of the active beam set among the respectively detected beams in the active set for retransmission.

[0146] Therefore, when the third UE 404c fails to successfully receive the first SPS signal 424 via the fourth beam 410d, the third UE 404c can transmit a third response signal 426c indicating NACK feedback associated with the first SPS signal 424 on the beam-specific NACK resource corresponding to the fourth beam 410d via which the first SPS signal 424 was not successfully received.

[0147] The base station 402 may receive a third response signal 426c indicating NACK feedback on a beam-specific NACK resource corresponding to the fourth beam 410d. In response, the base station 402 may transmit a second SPS signal 428 (which may be a retransmission of the first SPS signal 424) via the fourth beam 410d, for example, so that the third UE 404c may receive a retransmission of the first SPS signal 424. However, the base station 402 may suppress transmitting the second SPS signal 428 via the first and third beams 410a, 410c, which may correspond to the beam-specific ACK resources on which the base station 402 receives the response signals 426a-b, and further, may not correspond to any beam-specific NACK resources on which the base station 402 receives the response signal 426c. Effectively, the base station 402 may avoid unnecessary resource consumption and / or introduce interference by limiting retransmissions to only those beams that cover UEs that did not successfully receive the initial transmission.

[0148] In some aspects, the base station 402 can configure an SPS for at least two broadcast or multicast services for one or more UEs in the UE 404a-c and / or can configure an SPS for different broadcast or multicast services for different sets of UEs 404a-c. Each of the broadcast or multicast services can be associated with a different SPS configuration. For each broadcast or multicast service, the base station 402 can configure the transmission of the corresponding SPS signaling differently from the transmission of the SPS signaling configured for (all) other broadcast or multicast services. For example, the base station 402 can configure the transmission of the SPS signaling for the first broadcast or multicast service to have a different active beam set and / or at least one of different SFN cell combinations from the transmission of the SPS signaling configured for the second broadcast or multicast service.

[0149] Thus, beam management may be configured separately for different broadcast or multicast services. Potentially, beam sweeping with beam activation or deactivation (e.g., based on UE feedback) may be extended for periodic data transmission without DCI triggering (or DCI activation) or DCI release (or DCI deactivation) for one or more of UEs 404a-c. However, beam sweeping with beam activation or deactivation (e.g., based on UE feedback) may instead be signaled via MAC CE activation or deactivation.

[0150] Further, base station 402 can separately configure communication of SPS signaling for different broadcast or multicast services by configuring different feedback resources for different broadcast or multicast services on an uplink channel. When one of UEs 404a-c subsequently receives SPS signaling for the first broadcast or multicast service (e.g., data and / or control signaling on MTCH and / or MCCH, respectively) via one of the beams configured for the first broadcast or multicast service in the active beam set, the UE in UE 404a-c can send ACK feedback on the feedback resources configured for the first broadcast or multicast service corresponding to the beam in the active beam set (rather than on the feedback resources corresponding to the same beam but configured for the second broadcast or multicast service).

[0151] Accordingly, when one or more of UEs 404a-c receive another broadcast or multicast service, the one or more of UEs 404a-c may receive other SPS configuration information (which may be used for broadcast and / or multicast (e.g., similar to SPS configuration information 422)). The other SPS configuration information may indicate another set of feedback resources on the uplink channel for the second broadcast or multicast service, which may be different from the set of feedback resources configured for the first broadcast or multicast service on the uplink channel.

[0152] One or more of the UEs 404a-c may receive other SPS signals associated with other broadcast or multicast services on a downlink data channel from the base station 402, which may be different from the first and / or second SPS signals 424, 428 associated with the first broadcast or multicast service, or may be received via at least one of different active beam sets and / or different SFN cell combinations of the available beams 410a-d. When one or more of the UEs 404a-c successfully receive the other SPS signals associated with the other broadcast or multicast services, the one or more of the UEs 404a-c may transmit a response signal (e.g., similar to the response signals 426a-c) indicating ACK feedback on the other feedback resource set configured for the second broadcast or multicast service.

[0153] Figure 5Aand 5B 1 is a diagram illustrating an example wireless communication system 500, 550 of the first and second aspects including a base station 502, 502' and a set of UEs 504, 504'. The base station 502, 502' may be configured to allocate resources for beam-specific feedback on an uplink channel. The base station 502, 502' may configure the UE set 504, 504', respectively, with SPS. When the base station 502, 502' is to transmit SPS signaling on a downlink data channel (e.g., PDSCH), the base station 502, 502' may activate downlink SPS signaling using control signaling on a downlink control channel (e.g., PDCCH).

[0154] Thus, the base station 502, 502' may transmit SPS signaling after SPS activation on the downlink control channel. The base station 502, 502' may transmit SPS signaling on each TX beam in the active TX beam set that may be indexed. Interpretatively, the active TX beam set may be indexed from 0-4. The index may also refer to TCI status and / or QCL information.

[0155] The base station 502, 502' can configure an uplink resource set for feedback on an uplink channel. Each uplink resource in the uplink resource set can correspond to a corresponding TX beam in the active TX beam set. The base station 502, 502' can transmit SPS configuration information for broadcast and / or multicast indicating the uplink resource set to the UE set 504, 504' (which can be configured with a broadcast or multicast SPS). The base station 502, 502' may then transmit SPS signaling to the UE set 504, 504' via the TX beam set at each SPS opportunity in the SPS opportunity set. The SPS signaling may include SPS data on a downlink data channel (e.g., PDSCH) and / or may include one or more reference signals (e.g., CSI-RS and / or DM-RS).

[0156] Each UE in the UE set 504, 504' may receive SPS signaling on a corresponding subset of the TX beam set indexed from 0 to 3, and thus, each uplink resource in the uplink resource set may respectively correspond to one TX beam in the TX beam set indexed from 0 to 3. Each UE in the UE set 504, 504' may generate feedback based on receiving the SPS signaling, and transmit the feedback to the base station 502, 502' on a corresponding subset of the uplink resource set corresponding to the corresponding subset of the TX beam set.

[0157] The feedback may indicate ACK or NACK based on whether SPS signaling is successfully received on a subset of the SPS opportunity set. In one aspect, SPS signaling may be transmitted together with at least one reference signal on each SPS opportunity in the SPS opportunity set, and the feedback may be based on the at least one reference signal on at least one SPS opportunity in the subset of the SPS opportunity set. On the other hand, SPS signaling may include SPS data on each SPS opportunity in the SPS opportunity set, and the feedback may be based on the SPS data on at least one SPS opportunity in the subset of the SPS opportunity set. The subset of the SPS opportunity set may be configured by the base station 502 and may be indicated in the SPS configuration information for broadcast and / or multicast.

[0158] exist Figure 5A In the SPS signaling, the subset associated with the feedback in the SPS opportunity set may be one SPS opportunity, and therefore, the SPS configuration information for broadcast and / or multicast may indicate that the number of subsets of the SPS opportunity set is one. Figure 5B In the SPS signaling, the subset associated with the feedback in the SPS opportunity set may be at least two SPS opportunities, and thus, the SPS configuration information for broadcast and / or multicast may indicate that the number of subsets of the SPS opportunity set is two (or more in other aspects).

[0159] The base stations 502, 502' may receive each of the feedbacks from the corresponding UEs in the UE sets 504, 504' on at least one of the uplink resources corresponding to at least one TX beam in the TX beam set. Thus, the base station 502 may determine via which beams the SPS signaling was successfully or unsuccessfully received.

[0160] refer to Figure 5A , illustrates a first aspect of resource allocation for beam-specific feedback on an uplink channel (e.g., PUCCH). In the first aspect, a one-to-one mapping between beam-specific feedback on an uplink channel and SPS signaling on a downlink data channel. Thus, SPS configuration information for broadcast and / or multicast may indicate a number of SPS opportunities to be considered by each UE in a set of UEs 504 when generating feedback to be transmitted on one of the uplink resources corresponding to one of the TX beams on which each UE in the set of UEs 504 receives SPS signaling. In the first aspect, the number of SPS opportunities may be one.

[0161] Then, after each SPS opportunity, each UE in the set of UEs 504 may generate feedback indicating an ACK if the SPS signaling is successfully received, or a NACK if the SPS signaling is not successfully received. Each UE in the set of UEs 504 may then transmit feedback to the base station 502 on a corresponding uplink resource on an uplink channel corresponding to one of the TX beams indexed from 0 to 3 via which the SPS signaling is received. Each UE in the set of UEs 504 may not be expected to transmit feedback for more than one TX beam during the same feedback opportunity—for example, if one UE in the set of UEs 504 receives SPS signaling on at least two of the TX beams, the UE in the set of UEs 504 may transmit feedback on an uplink channel on an uplink resource corresponding to one of the at least two TX beams, but may refrain from transmitting feedback on uplink resources corresponding to the other TX beams of the at least two TX beams.

[0162] The base station 502 may receive each of the feedbacks from a corresponding UE in the set of UEs 504 on at least one of the uplink resources corresponding to at least one TX beam in the set of TX beams. Thus, the base station 502 may determine via which beam(s) the SPS signaling was successfully or unsuccessfully received, as indicated by which uplink resources(s) respectively configured to correspond to one of the TX beams carry ACK or NACK feedback.

[0163] refer to Figure 5B , a second aspect of resource allocation for beam-specific feedback on an uplink channel (e.g., PUCCH) is explained. In the second aspect, a one-to-N mapping between beam-specific feedback on an uplink channel and SPS signaling on a downlink data channel. Thus, SPS configuration information for broadcast and / or multicast indicates the number N of SPS opportunities to be considered by each UE in the set of UEs 504' when generating feedback to be transmitted on one of the uplink resources corresponding to one of the TX beams on which each UE in the set of UEs 504' receives SPS signaling. In the first aspect, the number N of SPS opportunities can be at least two.

[0164] Subsequently, after N SPS opportunities, each UE in the UE set 504' may generate feedback indicating an ACK if the SPS signaling was successfully received on the N SPS opportunities, or generate feedback indicating a NACK if the SPS signaling was not successfully received on the N SPS opportunities. After each of the N SPS opportunities, each UE in the UE set 504' may then transmit feedback to the base station 502' on a corresponding uplink resource on an uplink channel corresponding to one of the TX beams indexed from 0 to 3 via which the SPS signaling was received.

[0165] Each UE in the UE set 504' may determine whether the SPS signaling is successfully received on the N SPS occasions based on, for example, detection of the SPS signaling on at least one of the N SPS occasions and / or detection of the average energy of the SPS signaling on the N SPS occasions. In one example, when the energy associated with the SPS signaling detected on at least one of the N SPS occasions satisfies the first threshold, each UE in the UE set 504' may generate feedback to indicate ACK. Each UE in the UE set 504' may determine whether the corresponding energy of receiving the SPS signaling on one TX beam in a subset of the TX beam set at one of the N SPS occasions satisfies the first threshold. Each UE in the UE set 504' may transmit feedback indicating ACK on an uplink resource corresponding to one of the TX beams through which the SPS signaling satisfying the first threshold is detected. However, each UE in the UE set 504' may transmit feedback indicating NACK on an uplink resource corresponding to one of the TX beams through which the SPS signaling failing to satisfy the first threshold is detected.

[0166] In another example, when the energy associated with the SPS signaling averaged over N SPS opportunities satisfies a second threshold, each UE in the UE set 504' may generate feedback indicating an ACK. Thus, in some aspects, each UE in the UE set 504' may detect, at each of the N SPS opportunities, a corresponding energy of receiving SPS signaling on each TX beam in a subset of the TX beam set, and each UE in the UE set 504' may determine a corresponding average energy of receiving SPS signaling via one of the TX beams at each of the N SPS opportunities. If the corresponding average energy associated with one of the TX beams satisfies the second threshold, each UE in the UE set 504' may generate corresponding feedback indicating an ACK, and each UE in the UE set 504' may transmit feedback on an uplink resource corresponding to the TX beam via which the corresponding average energy satisfying the second threshold was detected in the TX beam. However, if the corresponding average energy associated with one of the TX beams fails to meet the second threshold, each UE in the UE set 504' may subsequently generate corresponding feedback to indicate a NACK, and each UE in the UE set 504' may transmit feedback on an uplink resource corresponding to the TX beam through which the corresponding average energy in the TX beam that failed to meet the second threshold was detected.

[0167] The base station 502' may receive each of the feedbacks from a corresponding UE in the set of UEs 504' on at least one of the uplink resources corresponding to at least one TX beam in the set of TX beams. Thus, the base station 502' may determine via which beam(s) the SPS signaling was successfully or unsuccessfully received, as indicated by which uplink resources(s) respectively configured to correspond to one of the TX beams carry ACK or NACK feedback.

[0168] refer to Figure 6 , the diagram illustrates a wireless communication system 600 in which a base station 602 communicates with a set of UEs including a first UE 604a and a second UE 604b. Each of the UEs 604a-b may be configured with SPS, for example, to receive broadcast or multicast signaling. To do so, the UEs 604a-b may notify the base station 602 of the UE capabilities. Therefore, each of the UEs 604a-b may transmit corresponding UE capability information to the base station 602.

[0169] Each of the UE capability information may indicate a capability of a corresponding one of the UEs 604a-b with respect to at least one of multicast communication, multi-beam reception (e.g., for beam combining), and / or parallel feedback transmission. For example, the corresponding capability of multicast communication may indicate the number (e.g., maximum number) of SPS multicast transmissions that each of the UEs 604a-b is capable of receiving. The corresponding capability of multi-beam reception may indicate the number (e.g., maximum number) of TX beams of the base station 602 that each of the UEs 604a-b is capable of monitoring (e.g., monitoring downlink SPS transmissions).

[0170] The corresponding capability of feedback may indicate whether the UE is capable of providing feedback for SPS broadcast or multicast transmission. The corresponding capability of parallel feedback transmission may indicate the number (e.g., maximum number) of parallel transmissions on an uplink channel (e.g., PUCCH) that each of the UEs 604a-b is capable of transmitting for feedback (e.g., if the base station 602 configures different uplink resource sets for feedback on the uplink channel). The corresponding capability of gaps required may indicate the minimum time (one of a pair of zero or non-zero values) between different PDSCH transmissions for SPS broadcast or multicast transmission. The UE capabilities may be different per CC and / or per frequency band.

[0171] The base station 602 may receive corresponding UE capability information from each of the UEs 604a-b. Based on the corresponding UE capability information, the base station 602 may configure a broadcast or multicast SPS for each of the UEs 604a-b. The base station 602 may configure the UEs 604a-b as a broadcast or multicast group. In addition, the base station 602 may perform beam management for SPS signaling (such as by activating and / or deactivating a TX beam of the base station 602 for SPS signaling transmission) based on the corresponding UE capability information.

[0172] The base station 602 may use the DCI on the downlink control channel (e.g., PDCCH) to indicate the activation (or "trigger") of the SPS signaling transmission on the SPS opportunity set. Similarly, the base station 602 may use the DCI on the downlink control channel (e.g., PDCCH) to release (or deactivate) the SPS signaling transmission. Therefore, the SPS signaling depends on the DCI on the downlink control channel to activate and release. Therefore, if one of the UEs 604a-b loses the activation in the DCI on the downlink control channel, the UE in the UE 604a-b may not be able to detect subsequent broadcast or multicast SPS signaling on the downlink data channel (e.g., PDSCH). That is, the UE in the UE 604a-b that loses the SPS activation in the DCI may not be aware of the scheduling for broadcast or multicast SPS signaling, and therefore may not be able to find the broadcast or multicast.

[0173] As an option to address the UE's failure to successfully receive the activation DCI, the base station 602 can configure UE 604a-b with UE-specific ACK / NACK feedback. Therefore, each of the UEs 604a-b can be able to notify the base station 602 that the activation DCI has been lost (e.g., during a discontinuous transmission (DTX) cycle) by transmitting NACK feedback. The base station 602 can retransmit the activation DCI on the downlink control channel in response to receiving the NACK feedback, which can allow one of the UEs 604a-b to receive the activation DCI and start receiving SPS signaling (e.g., at a subsequent SPS opportunity of the downlink data channel). However, the UE-specific ACK / NACK feedback configuration may consume a relatively large amount of resources, especially when a broadcast or multicast group configured with SPS includes a relatively large number of UEs.

[0174] As another option, the base station 602 may configure group NACK feedback for the UEs 604a-b. In such a configuration, each of the UEs 604a-b may transmit only NACK feedback on uplink resources of the uplink channel corresponding to one of the TX beams indexed from 0 to 3. However, only NACK feedback on uplink resources corresponding to the TX beams may cause the base station 602 to assume that each of the UEs 604a-b has successfully received the SPS signaling on the downlink data channel and therefore will not retransmit the activation DCI on the downlink control channel.

[0175] As a further option, the base station 602 may configure group ACK feedback for the UEs 604a-b. In such a configuration, each of the UEs 604a-b may transmit only ACK feedback on uplink resources of the uplink channel corresponding to one of the TX beams indexed from 0 to 3. However, only ACK feedback on uplink resources corresponding to TX beams may cause the base station 602 to assume that no UE is covered by some TX beams via which ACK feedback is not received, and therefore, the base station 602 may deactivate those TX beams for which ACK feedback is not received on the corresponding uplink resources, even though one or more UEs are covered by those TX beams but fail to successfully receive the activation DCI.

[0176] Similarly, if one of UEs 604a-b misses a release in a DCI on a downlink control channel, the UE in UEs 604a-b may become misaligned with base station 602 and may continue to send feedback (e.g., feedback indicating a NACK) regarding SPS signaling that was not actually transmitted on a downlink data channel. By transmitting feedback to base station 602 regarding signaling that did not actually occur, the misaligned UE in UEs 604a-b may introduce unnecessary interference to neighboring systems and devices, and further, may cause unnecessary overhead at base station 602.

[0177] As an option to solve the problem that the UE fails to successfully receive the release DCI, the base station 602 can configure UE 604a-b with UE-specific ACK / NACK feedback for the release DCI. Therefore, each UE in UE 604a-b can be able to notify the base station 602 that the release DCI has been lost (e.g., during the start-up or wake-up state of the DTX cycle) by transmitting NACK feedback. The base station 602 can retransmit the release DCI on the downlink control channel in response to receiving NACK feedback for the release DCI, which can allow one of the UEs 604a-b to receive the release DCI and stop monitoring SPS signaling (and stop feedback transmission). However, again, the UE-specific ACK / NACK feedback configuration may consume a relatively large amount of resources, especially when a broadcast or multicast group configured with SPS includes a relatively large number of UEs.

[0178] As another option, the base station 602 may configure group NACK feedback for the release DCI for the UEs 604a-b. In such a configuration, each of the UEs 604a-b may transmit only NACK feedback on the uplink resources of the uplink channel corresponding to one of the TX beams indexed from 0 to 3. However, the only NACK feedback on the uplink resources corresponding to the TX beam may cause one of the UEs 604a-b to continuously transmit NACK feedback when that UE fails to successfully receive the release DCI, even if the SPS signaling has ended.

[0179] As a further option, the base station 602 may configure group ACK feedback for the release DCI for the UEs 604a-b. In such a configuration, each of the UEs 604a-b may transmit only ACK feedback on the uplink resources of the uplink channel corresponding to one of the TX beams indexed from 0 to 3. However, only ACK feedback on the uplink resources corresponding to the TX beam may cause the UEs 604a-b to continuously detect the SPS signaling that has ended when one of the UEs 604a-b fails to successfully receive the release DCI.

[0180] The base station 602 may transmit downlink data on a downlink data channel to a UE 604a-b configured with SPS on an SPS opportunity set. The base station 602 may then determine whether to retransmit at least one of the downlink data and / or DCI associated with SPS activation or release, and the base station 602 may retransmit the at least one of the downlink data and / or DCI when determining that the at least one of the downlink data and / or DCI is to be retransmitted.

[0181] Each of UEs 604a-b may determine whether at least one of downlink data on a downlink data channel or a DCI associated with SPS activation or release on at least one multicast SPS opportunity was not successfully received from base station 602, and further, may receive a retransmission of the at least one of the downlink data or the DCI upon determining that the at least one of the downlink data or the DCI was not successfully received. In some aspects, each of UEs 604a-b may receive a retransmission of SPS activation or release for a multicast group in a unicast DCI, although the multicast SPS activation or release may also have been indicated by a multicast DCI that the UE may not have successfully received.

[0182] In a first aspect, the base station 602 may configure feedback for activation DCI and / or for broadcast or multicast signaling on a downlink data channel (e.g., PDSCH). In the first scenario of the first aspect in which broadcast or multicast SPS signaling on a downlink data channel requires feedback, the base station 602 may configure UE-specific ACK / NACK feedback for broadcast or multicast SPS signaling scheduled by activation DCI on the downlink data channel. However, the base station 602 may configure group-specific NACK feedback only for broadcast or multicast SPS signaling not scheduled by activation DCI on the downlink data channel.

[0183] Further for the first scenario of the first aspect, the base station 602 may configure a corresponding UE-specific feedback resource set on an uplink channel (e.g., PUCCH) for each UE in UE 604a-b. The corresponding UE-specific feedback resource set may be configured to carry one of ACK or NACK feedback associated with downlink data on an SPS opportunity activated by DCI in an SPS opportunity set. That is, the base station 602 may configure each beam-specific feedback resource in the beam-specific feedback resource set on an uplink channel for the corresponding beam in the beam set via which downlink data is transmitted. Each beam-specific feedback resource may be configured to carry NACK feedback associated with downlink data on an SPS opportunity that is not activated in the SPS opportunity set. When at least one of the UE-specific feedback resources and / or the beam-specific feedback resources carries NACK feedback, the base station 602 may determine to retransmit at least one of the downlink data or the DCI.

[0184] Correspondingly, each of UEs 604a-b may receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from base station 602, and the UE-specific feedback resource set may be configured to carry at least one of ACK or NACK feedback associated with downlink data on an SPS opportunity activated by DCI in the SPS opportunity set. Further, each of UEs 604a-b may receive second configuration information indicating a beam-specific feedback resource set on an uplink channel for a corresponding TX beam in a TX beam set of base station 602 from base station 602, and each of the beam-specific feedback resources may be configured to carry NACK feedback associated with downlink data on an SPS opportunity not activated by DCI in the SPS opportunity set.

[0185] Each of the UEs 604a-b may transmit one of ACK feedback or NACK feedback on a UE-specific feedback resource set based on whether downlink data is successfully received from the base station 602 on the SPS opportunity that is not activated by the DCI in the SPS opportunity set. Further, each of the UEs 604a-b may transmit NACK feedback on one of the beam-specific feedback resources when downlink data is successfully received from the base station on the SPS opportunity that is not activated by the DCI in the SPS opportunity set. A retransmission of at least one of the downlink data or the DCI may be received based on at least one of transmitting NACK feedback on the UE-specific feedback resource set or transmitting NACK feedback on the beam-specific feedback resource set.

[0186] In the second scenario of the first aspect where the broadcast or multicast SPS signaling on the downlink data channel does not require feedback, the base station can configure the UE 604a-b with a UE-specific ACK or an ACK / NACK on a UE-specific resource if the UE successfully receives the activation DCI. That is, no feedback can be used for the SPS signaling on the downlink data channel; instead, the feedback can be configured as an ACK for the activation DCI (rather than the UE decoding result for the SPS signaling on the downlink data channel).

[0187] The base station 602 may configure each of the UEs 604a-b with a corresponding set of UE-specific feedback resources on an uplink channel (e.g., PUCCH). The base station 602 may configure each set of UE-specific feedback resources to carry one of ACK or NACK feedback associated with the DCI. The DCI may be transmitted to activate or release SPS signaling on an SPS opportunity set, and the base station 602 may determine to retransmit the DCI when at least one of the UE-specific feedback resources carries NACK feedback or ACK feedback is not present in the UE-specific feedback resources.

[0188] Further for the second scenario of the first aspect, each UE in UE 604a-b may receive configuration information indicating a feedback resource set that varies from UE to UE on an uplink channel. The feedback resource set that varies from UE to UE may be configured to carry one of ACK or NACK feedback associated with DCI. When DCI is not successfully received, each UE in UE 604a-b may transmit NACK feedback on the feedback resource set that varies from UE to UE. DCI may be received to activate or release an SPS opportunity set, and when NACK feedback or ACK feedback is not present in the feedback resource that varies from UE to UE is transmitted on at least one of the feedback resources that vary from UE to UE, a retransmission of DCI may be received. In some aspects, one, some or all retransmissions of DCI may be unicast, even when the initial transmission may have been multicast.

[0189] In a second aspect, the reliability of activation DCI and / or release DCI for SPS can be improved by introducing repetition of SPS downlink control channel (e.g., PDCCH) signaling, more diversity through inter-slot interleaving / hopping, greater aggregation levels, etc., so that the base station 602 can select appropriate resources on the downlink control channel to improve the reliability to a satisfactory level, even in the absence of feedback. In the second scenario, a detection window can be introduced in which multiple repetitions of SPS control signaling can be transmitted on the downlink control channel - that is, the base station 602 can transmit more than one activation DCI in a window and / or more than one release DCI in another window.

[0190] The base station 602 may determine the retransmission associated with the DCI, and the base station 602 may transmit the DCI at least twice within the retransmission window. For example, the base station 602 may determine the number of repetitions of the DCI, which may be indicated via SIB, signaling on the MCCH, and / or unicast RRC signaling.

[0191] Correspondingly, each of UE 604a-b may determine a retransmission window in which at least one retransmission of the DCI is detected, and each of UE 604a-b may further receive a retransmission of the DCI in the retransmission window when an initial retransmission of the DCI is not successfully received. Each of UE 604a-b may receive information indicating a repetition number of the retransmission of the DCI from base station 602 via at least one of SIB, MCCH, and / or unicast RRC signaling, and may receive a retransmission of the DCI based on the determined repetition number.

[0192] In some aspects, the base station 602 may transmit an initial transmission of the DCI using at least one of an inter-slot interleaving pattern, an inter-slot hopping pattern, and / or an aggregation level that is different from at least one retransmission of the DCI. The retransmission with at least one of a different inter-slot interleaving pattern, an inter-slot hopping pattern, and / or an aggregation level may occur in a retransmission window. Thus, each of the UEs 604a-b may receive a retransmission of the DCI using at least one of an inter-slot interleaving pattern, an inter-slot hopping pattern, and / or an aggregation level that is configured differently from the initial transmission of the DCI.

[0193] Figure 7 700 is a flow chart of a wireless communication method 700. The method 700 may be performed by a UE. For example, the method 700 may be performed by one or more of UE 104, 350, 402a-c, 504 / 504', 604a-b and / or devices 1502 / 1502'. In another example, the method 700 may be performed by a processing system 1614, which may include a memory 360 and may be a component of the entire UE or the UE (such as a TX processor 368, an RX processor 356, and / or a controller / processor 359). In some aspects, the UE performing the method 700 may be configured with an SPS by a base station. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed concurrently.

[0194] At 702, the UE may transmit capability information to the base station, the capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception (e.g., for beam combining), or a capability for parallel feedback transmission. In some aspects, the UE capability information may indicate the respective capabilities of the UE with respect to each of a plurality of CCs and / or each of a plurality of frequency bands. In some aspects, the capability for multicast communication may indicate the number (e.g., the maximum number) of SPS multicast transmissions that the UE is capable of receiving. The capability for multi-beam reception may indicate the number (e.g., the maximum number) of TX beams of the base station that the UE is capable of monitoring (e.g., monitoring downlink SPS transmissions).

[0195] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission to the base station 402. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may transmit capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission to the base station 402. For example, referring to Figure 6 , one of the UEs 604a-b may transmit UE capability information to the base station 402, which may indicate a capability of that UE among the UEs 604a-b regarding at least one of multicast communication, multi-beam reception, and / or parallel feedback transmission.

[0196] At 704, the UE may receive SPS configuration information for broadcast and / or multicast from the base station, the SPS configuration information indicating a resource set configured for feedback. For example, the SPS configuration information for multicast may be based on a common resource for a multicast UE group. The common resources may include resources allocated to all UEs in the multicast UE group. For example, on the downlink, the common resources may include resources on which multicast transmissions may be scheduled or otherwise found. Each UE in the multicast UE group may receive and decode information carried on such downlink common resources. For example, on the uplink, the common resources may include resources allocated to any or all UEs in the multicast UE group. Therefore, such resources may not be UE-specific; however, such resources may be beam-specific. In some aspects, a resource set may be an uplink resource set on an uplink channel. Each TX beam in the TX beam set of the base station may correspond to a corresponding subset of the resource set. In some aspects, the resource set may be or may include a beam-specific feedback resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific feedback resource set.

[0197] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive SPS configuration information 422 from the base station 402, the SPS configuration information indicating an uplink resource set configured for feedback on an uplink channel (e.g., PUCCH). Each TX beam in the set of TX beams 410a-d of the base station 402, respectively indexed from 0 to 3, may correspond to a respective subset of the uplink resource set, which may be associated with a respective one of the indexes 0 to 3. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive SPS configuration information for broadcast and / or multicast from the base station 502 / 502', the SPS configuration information indicating an uplink resource set configured for feedback on an uplink channel (e.g., PUCCH). Each TX beam in the TX beam sets of the base station 502 / 502', which are indexed from 0 to 3, respectively, may correspond to a corresponding subset of the uplink resource set, which may be associated with a corresponding one of the indexes 0 to 3. For example, referring to Figure 6 , one of UEs 604a-b can receive SPS configuration information for broadcast and / or multicast from base station 602, wherein the SPS configuration information indicates an uplink resource set for feedback on an uplink channel (e.g., PUCCH), wherein each TX beam in the TX beam set of base station 602 corresponds to a corresponding subset of the uplink resource set.

[0198] At 706, the UE may receive SPS signaling from the base station via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive at least one first SPS signal 424 from the base station 402 via at least one TX beam in the set of TX beams 410a-d of the base station 402. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive SPS signaling from the base station 502 / 502' via at least one TX beam in the TX beam set indexed from 0 to 3 at each SPS opportunity in the SPS opportunity set. Figure 6 , one of the UEs 604a-b can receive SPS signaling from the base station 602 via at least one TX beam in the TX beam set on each SPS opportunity in the SPS opportunity set.

[0199] At 708, the UE may transmit feedback to the base station on one or more subsets corresponding to the one or more TX beams in the resource set respectively based on the SPS signaling. The feedback may indicate one of ACK or NACK associated with the SPS signaling. In some aspects, the feedback may be associated with the SPS signaling on a subset of the SPS opportunity set. In some aspects, the subset associated with the feedback in the SPS opportunity set of the SPS signaling may be an SPS opportunity. In some other aspects, the subset associated with the feedback in the SPS opportunity set of the SPS signaling may be at least two SPS opportunities. The SPS configuration information for broadcast and / or multicast may further indicate the number of the at least two SPS opportunities. In addition, the SPS configuration information for broadcast and / or multicast may further indicate that the feedback will indicate ACK when one of the following: the energy associated with the SPS signaling detected on at least one of the at least two SPS opportunities meets (e.g., reaches or exceeds) a first threshold, or the energy associated with the SPS signaling averaged on the at least two SPS opportunities meets a second threshold. In yet a further aspect, feedback may be transmitted on each subset of the beam-specific feedback resource set corresponding to one of the TX beam subsets.

[0200] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit a corresponding at least one response signal 426a-c to the base station 402 on one or more subsets of the uplink resource set corresponding to one or more TX beams in the set of TX beams 410a-d, respectively, to indicate ACK or NACK feedback for one or more TX beams in the set of TX beams 410a-d. For example, referring to Figure 5A and 5B , the UE set 504 / 504' may transmit feedback to the base station 502 / 502' on one or more subsets of the uplink resource set corresponding to one or more TX beams in the TX beam set, respectively, based on the SPS signaling, and the feedback may indicate one of ACK or NACK. Figure 6 , one of the UEs 604a-b may transmit feedback to the base station 602 on one or more subsets in the uplink resource set corresponding to one or more TX beams in the TX beam set, respectively, based on the SPS signaling.

[0201] Figure 8800 is a flow chart of a wireless communication method 800. The method 800 may be performed by a UE. For example, the method 800 may be performed by one or more of the UE 104, 350, 402a-c, 504 / 504', 604a-b and / or the device 1502 / 1502'. In another example, the method 800 may be performed by a processing system 1614, which may include a memory 360 and may be a component of the entire UE or the UE (such as a TX processor 368, an RX processor 356, and / or a controller / processor 359). In some aspects, the UE executing the method 800 may be configured with an SPS by a base station.

[0202] In some respects, Figure 8 Method 800 can be combined with Figure 7 The method 700 can be practiced. For example, Figure 8 Some example operations of 704 are illustrated, as well as some example operations that may be practiced after 704, within 704, or at another time. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed contemporaneously.

[0203] In some aspects, to receive SPS configuration information for broadcast and / or multicast from a base station, the SPS configuration information indicating a set of uplink resources for feedback on an uplink channel, such as by Figure 7 As explained in 704, the UE may practice or execute Figure 8 802 and 804.

[0204] At 802, the UE may receive first configuration information indicating a beam-specific ACK resource set on an uplink channel, wherein each TX beam in a TX beam set corresponds to a respective subset of the beam-specific ACK resource set. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive SPS configuration information 422 indicating a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the set of TX beams 410a-d corresponds to a respective subset of the beam-specific ACK resource set. Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive first configuration information indicating a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a respective subset of the beam-specific ACK resource set. Figure 6, one of the UEs 604a-b may receive first configuration information indicating a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific ACK resource set. Figure 7 In the context of , the resource set described in method 700 may be or may include a beam-specific ACK resource set on an uplink channel.

[0205] At 804, the UE may receive second configuration information indicating a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a respective subset of the beam-specific NACK resource set. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive SPS configuration information 422 indicating a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the set of TX beams 410a-d corresponds to a respective subset of the beam-specific NACK resource set. Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive second configuration information indicating a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a respective subset of the beam-specific NACK resource set. Figure 6 , one of the UEs 604a-b may receive second configuration information indicating a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific NACK resource set. Figure 7 In the context of, the resource set described in method 700 may be or may include a beam-specific NACK resource set on an uplink channel.

[0206] At 806, the UE may transmit ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beam in the TX beam set via which the SPS data was successfully received. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit at least one respective response signal 426a-c that may indicate ACK feedback associated with SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beams in the set of TX beams 410a-d via which SPS data (e.g., the first signal(s) 424 may include SPS data) was successfully received. For example, referring to Figure 5A and 5B, at least one UE in the set of UEs 504 / 504' may transmit ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beam in the set of TX beams via which the SPS data was successfully received. Figure 6 , one of UEs 604a-b may transmit ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beam in the TX beam set via which the SPS data was successfully received.

[0207] At 808, the UE may transmit NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam in the TX beam set via which the SPS data was not successfully received. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit at least one respective response signal 426a-c that may indicate NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beams in the set of TX beams 410a-d via which the SPS data (e.g., the first signal(s) 424 may include the SPS data) was not successfully received. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may transmit NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam in the TX beam set via which the SPS data was not successfully received. Figure 6 , one of UEs 604a-b may transmit NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to a TX beam in the TX beam set via which the SPS data was not successfully received.

[0208] At 810, the UE may receive a retransmission of the SPS data via each TX beam in the TX beam set corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback is transmitted. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive at least one second set of SPS signals 428, which may include retransmissions of SPS data, via each TX beam in the set of TX beams 410a-d corresponding to a subset of the beam-specific NACK resource set on which NACK feedback is transmitted. Figure 5A and 5B, at least one UE in the set of UEs 504 / 504' may receive a retransmission of the SPS data via each TX beam in the set of TX beams corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback is transmitted. Figure 6 , one of the UEs 604a-b may receive a retransmission of the SPS data via each TX beam in the set of TX beams corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback is transmitted.

[0209] Fig. 9 900 is a flow chart of a wireless communication method. The method 900 may be performed by a UE. For example, the method 900 may be performed by one or more of UE 104, 350, 402a-c, 504 / 504', 604a-b and / or devices 1502 / 1502'. In another example, the method 900 may be performed by a processing system 1614, which may include a memory 360 and may be a component of the entire UE or the UE (such as a TX processor 368, an RX processor 356, and / or a controller / processor 359). In some aspects, the UE executing the method 900 may be configured with an SPS by a base station.

[0210] In some respects, Fig. 9 The method 900 may be combined with Figure 7 The method 700 can be practiced. For example, Fig. 9 Some example operations of 706 are illustrated, as well as some example operations that may be practiced after, within, or elsewhere at 706. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed contemporaneously.

[0211] At 902, the UE may receive information indicating a TX beam set from a base station. In some aspects, the information indicating the TX beam set may indicate a number of beams of the base station and a bitmap having each bit corresponding to a corresponding one of the beams of the base station, and in the bitmap, a first bit value (e.g., "1") may indicate that the corresponding one of the beams is included in the TX beam set, and a second bit value (e.g., "0") may indicate that the corresponding one of the beams is excluded from the TX beam set. For example, the TX beam set may include an active TX beam set (e.g., beams via which the base station is configured to transmit SPS data or other information), such that a first bit value in the bitmap may indicate that a beam is included in the active TX beam set, and a second bit value in the bitmap indicates that a beam is excluded from the active TX beam set.

[0212] For example, refer to Figure 4A and 4B, at least one UE in the set of UEs 404a-c may receive SPS configuration information 422 indicating the set of TX beams 410a-d from the base station 402. The SPS configuration information 422 may include a bitmap having a first value at each bit corresponding to the first TX beam 410a, the second TX beam 410b, and the fourth TX beam 410d; however, the bitmap may have a second value at a bit corresponding to the second beam 410b, which may be excluded from the set of active TX beams. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive information indicating a TX beam set from the base station 502 / 502'. Figure 6 , one of UEs 604a-b can receive information indicating the TX beam set from base station 602.

[0213] In some aspects, to receive SPS signaling from a base station via one or more TX beams in a TX beam set at each SPS opportunity in a set of SPS opportunities, as described by Figure 7 As explained in 706, the UE may practice or execute Fig. 9 One or more of 904, 906, 908, 910, 912 and / or 914.

[0214] At 904, the UE may receive a first signal set from the base station on a downlink data channel via one or more TX beams in the TX beam set of the base station. In some aspects, each first signal in the first signal set may be a reference, pilot or synchronization signal, such as a CSI-RS, SSB or other reference signal. In some other aspects, each first signal in the first signal set may include a control signal on the MCCH carried in the downlink data channel. In yet other aspects, the first signal set may include SPS data. The UE may receive a corresponding subset of the first signal set on each SPS opportunity in the SPS opportunity set.

[0215] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive at least one first signal 424 from the base station 402 on a downlink data channel via one or more TX beams in the set of TX beams 410a-d of the base station 402. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive at least one first signal from the base station 502 / 502' on the downlink data channel via the TX beam set of the base station 502 / 502'. Figure 6, one of UEs 604a-b can receive at least one first signal from base station 602 on a downlink data channel via the TX beam set of base station 602.

[0216] At 906, the UE may determine a corresponding energy corresponding to each first signal in the first signal set. In some aspects, first, the UE may measure the energy of a first signal in the first signal set. For example, the UE may measure at least one value indicating channel quality, signal strength, etc. (e.g., at least one of RSRP, RSSI, RSRQ, SNR and / or other channel quality values) based on receiving the first signal in the first signal set. Second, the UE may store the measured value in association with the first signal in the first signal set from which the value is measured. Since each first signal in the first signal set may be associated with a TX beam in the TX beam set, the UE may store the measured value in association with a TX beam in the TX beam set via which the first signal in the first signal set is received.

[0217] In some other aspects, first, the UE may measure the average energy of at least two first signals in the first signal set received via one TX beam in the TX beam set at at least two SPS opportunities. For example, the UE may measure at least one corresponding value indicating channel quality, signal strength, etc. (e.g., at least one of RSRP, RSSI, RSRQ, SNR and / or other channel quality values) based on each of the at least two first signals in the first signal set received via one TX beam in the TX beam set at one of the at least two SPS opportunities. The UE may average the at least two measured values ​​to obtain an average value for the at least two first signals received via that TX beam in the TX beam set at the at least two SPS opportunities. The UE may store the average value in association with at least one of the at least two first signals in the first signal set from which at least two corresponding values ​​are measured. Since each first signal in the first signal set may be associated with a TX beam in the TX beam set, the UE may store the average value in association with that TX beam in the TX beam set via which the at least two first signals in the first signal set are received.

[0218] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may determine a respective energy corresponding to each first signal in the set of first signals 424 received via one of the set of TX beams 410a-d at the set of SPS opportunities. Figure 5A and 5B, at least one UE in the set of UEs 504 / 504' may determine a corresponding energy corresponding to each first signal in the set of first signals received via one TX beam in the set of TX beams at the set of SPS opportunities. Figure 6 , one of the UEs 604a-b may determine a respective energy corresponding to each first signal in the set of first signals received via one of the sets of TX beams 410a-d at the set of SPS opportunities.

[0219] At 908, the UE may determine a TX beam subset from the TX beam set based on a first signal set received via the one or more TX beams in the TX beam set. In some aspects, first, the UE may compare at least one value (e.g., a measured value or an average value) associated with at least one TX beam in the TX beam set with a threshold (such as a threshold associated with satisfactory channel quality, signal strength, etc.). Second, the UE may evaluate whether the at least one value satisfies (e.g., reaches or exceeds) the threshold. Third, when a TX beam in the TX beam set is associated with at least one value that satisfies the threshold, the UE may select the TX beam to be included in the TX beam subset, or when a TX beam in the TX beam set is associated with at least one value that fails to satisfy (e.g., is less than) the threshold, the UE may exclude the TX beam from the TX beam subset.

[0220] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may determine a TX beam subset including at least one of the first, third, and fourth TX beams 410a, 410c, 410d from the set of TX beams 410a-d based on the first signal set 424 received via one or more TX beams in the set of TX beams 410a-d. Figure 5A and 5B , at least one UE in the set of UEs 504 / 504' may determine a TX beam subset from the set of TX beams based on a first set of signals received via one or more TX beams in the set of TX beams. Figure 6 , one of the UEs 604a-b may determine a TX beam subset from the TX beam set based on a first signal set received via one or more TX beams in the TX beam set.

[0221] At 910, the UE may transmit a set of response signals indicating a TX beam subset on an uplink channel. The TX beam subset may be those beams having satisfactory channel quality, signal strength, etc. as reflected by a corresponding measured value associated with each TX beam in the TX beam subset. In some aspects, each response signal in the set of response signals may indicate that a corresponding energy corresponding to one of the reference signals received via one of the TX beams in the TX beam subset satisfies a threshold. In some other aspects, each response signal in the set of response signals may include an ACK signal corresponding to a corresponding control signal received via one of the TX beams in the TX beam subset. In yet further aspects, each response signal in the set of response signals may be transmitted on a beam-specific feedback resource set corresponding to the TX beam subset.

[0222] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit a corresponding one of the set of response signals 426a-c on the uplink channel indicating a corresponding TX beam subset from the set of TX beams 410a-d (including at least one of the first, third, and fourth TX beams 410a, 410c, 410d). Figure 5A and 5B , at least one UE in the UE set 504 / 504' may transmit a corresponding response signal(s) indicating a corresponding TX beam subset of the TX beam set on an uplink channel. Figure 6 , one of the UEs 604a-b may transmit a corresponding response signal(s) on an uplink channel indicating a corresponding TX beam subset of the TX beam set.

[0223] At 912, the UE may transmit measurement information associated with at least one TX beam in the TX beam subset to the base station on an uplink channel. The measurement information may include one or more values ​​(e.g., one or more measured values ​​or one or more average values) that satisfy a threshold, wherein each of the one or more values ​​is associated with a corresponding one of the TX beams in the TX beam subset. In some aspects, the measurement information may include each determined energy value corresponding to a corresponding one of the first signals in the set of first signals received via the TX beam subset.

[0224] For example, referring to 4A and 4B, at least one UE in the set of UEs 404a-c may transmit one of the set of response signals 426a-c indicating a TX beam subset of the set of TX beams 410a-d to the base station 402 on an uplink channel, wherein the one of the set of response signals 426a-c includes measurement information associated with at least one TX beam in the TX beam subset of the set of TX beams 410a-d. Figure 5A and 5B , at least one UE in the UE set 504 / 504' may transmit a response signal(s) indicating a TX beam subset of the TX beam set to the base station 502 / 502' on an uplink channel, wherein the response signal(s) include measurement information associated with at least one TX beam in the TX beam subset. For example, referring to Figure 6 , one of the UEs 604a-b may transmit a response signal(s) indicating a TX beam subset of the TX beam set to the base station 602 on an uplink channel, wherein the response signal(s) include measurement information associated with at least one TX beam in the TX beam subset.

[0225] At 914, the UE may receive SPS data from the base station on the downlink data channel via the TX beam subset. In some aspects, the SPS data may be received based on UE capability information transmitted to the base station. For example, referring to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive at least one second set of SPS signals 428, which may include SPS data received on a downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information transmitted to the base station 402. For example, referring to Figure 5A and 5B , at least one UE in the set of UEs 504 / 504' may receive SPS data on a downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information transmitted to the base station 502 / 502'. Figure 6 , one of the UEs 604a-b can receive SPS data on the downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information transmitted to the base station 602.

[0226] Fig.101 is a flow chart of a wireless communication method 1000. The method 1000 may be performed by a UE. For example, the method 1000 may be performed by one or more of the UE 104, 350, 402a-c, 504 / 504', 604a-b and / or the device 1502 / 1502'. In another example, the method 1000 may be performed by a processing system 1614, which may include a memory 360 and may be a component of the entire UE or the UE (such as a TX processor 368, an RX processor 356, and / or a controller / processor 359). In some aspects, the UE performing the method 1000 may be configured with an SPS by a base station. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed concurrently.

[0227] At 1002, the UE may receive information indicating the number of repetitions of retransmissions of SPS activation or release for a multicast group indicated by a DCI via at least one of SIB, MCCH, or unicast RRC signaling. Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive information indicating the number of repetitions of retransmissions of SPS activation or release for the multicast group indicated by the multicast DCI via at least one of SIB, MCCH, or unicast RRC signaling. Figure 5A and 5B , at least one UE in the set of UEs 504 / 504' may receive information indicating the number of repetitions of retransmissions of SPS activation or release for the multicast group indicated by the multicast DCI via at least one of SIB, MCCH, or unicast RRC signaling. Figure 6 , one of the UEs 604a-b may receive information indicating a repetition number of retransmissions of SPS activation or release for the multicast group indicated by the multicast DCI via at least one of SIB, MCCH, or unicast RRC signaling.

[0228] At 1004, the UE may receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from a base station. The UE-specific feedback resource set may be configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set. In some aspects, the at least one SPS opportunity in the SPS opportunity set is activated by a DCI. For example, referring to Figure 4A and 4B, at least one UE in the set of UEs 404a-c may receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from the base station 402, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the set of SPS opportunities. For example, referring to Figure 5A and 5B , at least one UE in the UE set 504 / 504' may receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from the base station 502 / 502', wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set. For example, referring to Figure 6 , one of UEs 604a-b can receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from base station 602, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set.

[0229] At 1006, the UE may receive, from the base station, second configuration information indicating a beam-specific feedback resource set on an uplink channel, the beam-specific feedback resource set configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. In some aspects, each beam in the beam set of the base station corresponds to a respective subset of the beam-specific feedback resource set. For example, referring to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may receive second configuration information indicating a beam-specific feedback resource set on an uplink channel from the base station 402, the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the set of SPS opportunities. In some aspects, each beam in the set of beams 410a-d of the base station 402 corresponds to a respective subset of the beam-specific feedback resource set. For example, referring to Figure 5A and 5B, at least one UE in the set of UEs 504 / 504' may receive second configuration information indicating a beam-specific feedback resource set on an uplink channel from the base station 502 / 502', the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the set of SPS opportunities. In some aspects, each beam in the set of beams of the base station 502 / 502' corresponds to a respective subset of the beam-specific feedback resource set. For example, referring to Figure 6 , one of UEs 604a-b may receive second configuration information indicating a beam-specific feedback resource set on an uplink channel from base station 602, the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. In some aspects, each beam in the beam set of base station 602 corresponds to a respective subset of the beam-specific feedback resource set.

[0230] At 1008, the UE may determine whether at least one of downlink data or multicast DCI on a downlink data channel on at least one multicast SPS opportunity was not successfully received from the base station. The UE may identify at least one beam in the beam set of the base station via which downlink data or DCI was not successfully received. In some aspects, first, the UE may identify a resource set that is scheduled to carry at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or SPS activation or release for a multicast group indicated by a DCI associated with SPS activation or release. Second, the UE may monitor the identified resource set, and the UE may decode information carried on the identified resource set to attempt to obtain at least one of downlink data or DCI associated with SPS activation or release. In the case where the UE successfully decodes the information on the identified resource set to obtain at least one of the downlink data or the DCI associated with the SPS activation or release (for example, the UE can determine that the error check or the data integrity check has succeeded and the decoded information is addressed to a multicast group including the UE), the UE can determine that the downlink data or the at least one of the DCI associated with the SPS activation or release is successfully received. In the case where the UE cannot successfully decode the information on the identified resource set to obtain at least one of the downlink data or the DCI associated with the SPS activation or release (for example, when the UE is decoding the information, the UE can determine that the error check or the data integrity check has failed), the UE can determine that the downlink data or the at least one of the DCI associated with the SPS activation or release is not successfully received, and further, the UE can identify a beam in the beam set of the base station via which the downlink data or the DCI is not successfully received.

[0231] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may determine whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or SPS activation or release for a multicast group indicated by a DCI associated with SPS activation or release is not successfully received from base station 402. For example, referring to Figure 5A and 5B , at least one UE in the UE set UE 504 / 504' may determine whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or SPS activation or release for a multicast group indicated by a DCI associated with SPS activation or release is not successfully received from the base station 502 / 502'. For example, referring to Figure 6 , one of UEs 604a-c can determine whether downlink data on a downlink data channel on at least one multicast SPS opportunity or at least one of SPS activation or release for a multicast group indicated by a DCI associated with the SPS activation or release is not successfully received from base station 602.

[0232] At 1010, the UE may transmit one of ACK feedback or NACK feedback on a feedback resource set that varies from UE to UE based on whether downlink data is successfully received from a base station on at least one SPS opportunity in the SPS opportunity set. In some aspects, the at least one SPS opportunity in the SPS opportunity set is not activated by DCI. The UE may transmit ACK feedback on at least one UE-specific feedback resource in the feedback resource set that varies from UE to UE when downlink data is successfully received from a base station on at least one SPS opportunity in the SPS opportunity set. However, the UE may transmit NACK feedback on at least one UE-specific feedback resource in the feedback resource set that varies from UE to UE when downlink data is not successfully received from a base station on at least one SPS opportunity in the SPS opportunity set.

[0233] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit one of ACK feedback or NACK feedback on a feedback resource set that varies by UE based on whether downlink data is successfully received from the base station 402 on at least one SPS opportunity in the set of SPS opportunities. Figure 5A and 5B, at least one UE in the UE set 504 / 504' may transmit one of ACK feedback or NACK feedback on a feedback resource set that differs from the UE based on whether downlink data is successfully received from the base station 502 / 502' on at least one SPS opportunity in the SPS opportunity set. Figure 6 , one of the set of UEs 604a-b may transmit one of ACK feedback or NACK feedback on a feedback resource set that varies by UE based on whether downlink data is successfully received from the base station 602 on at least one SPS opportunity in the set of SPS opportunities.

[0234] At 1012, the UE may transmit NACK feedback on each subset in the beam-specific feedback resource set corresponding to a beam in the beam set via which downlink data was not successfully received from the base station on at least one SPS opportunity that was not activated by the DCI in the SPS opportunity set. However, in some aspects, when downlink data is successfully received from the base station on at least one SPS opportunity that was not activated by the DCI in the SPS opportunity set, the UE may refrain from transmitting feedback (e.g., ACK feedback) on at least one beam-specific feedback resource in the beam-specific feedback resource set because the beam-specific feedback resource set may be configured to carry NACK feedback instead of ACK feedback.

[0235] For example, refer to Figure 4A and 4B , at least one UE in the set of UEs 404a-c may transmit NACK feedback on each subset in the beam-specific feedback resource set corresponding to a beam in the set of beams via which downlink data was not successfully received from the base station 402 on at least one SPS opportunity that was not activated by the DCI in the set of SPS opportunities. Figure 5A and 5B , at least one UE in the set of UEs 404a-c may transmit NACK feedback on each subset in the beam-specific feedback resource set corresponding to a beam in the set of beams via which downlink data was not successfully received from the base station 502 / 502' on at least one SPS opportunity that was not activated by the DCI in the set of SPS opportunities. Figure 6 , one of UE 604a-b may transmit NACK feedback on each subset of the beam-specific feedback resource set corresponding to a beam in the beam set via which downlink data was not successfully received from the base station 602 on at least one SPS opportunity that was not activated by DCI in the SPS opportunity set.

[0236] At 1014, upon determining that at least one of downlink data or SPS activation or release for a multicast group has not been successfully received, the UE may receive a retransmission of at least one of downlink data or SPS activation or release for a multicast group. The retransmission of downlink data or at least one of SPS activation or release for a multicast group may be received based on the transmission of at least one of NACK feedback on a feedback resource set that varies from UE to UE or NACK feedback on a feedback resource set that varies from beam to beam. In some aspects, the UE may receive one or more retransmissions of SPS activation or release for a multicast group, wherein the number of repetitions of the one or more retransmissions is received via at least one of SIB, MCCH, or unicast RRC (which has information indicating the number of repetitions of retransmissions of SPS activation or release for a multicast group). In some aspects, the UE may receive a retransmission of SPS activation or release for a multicast group in a unicast DCI, although the multicast SPS activation or release may also have been indicated by a multicast DCI that the UE may not have successfully received.

[0237] For example, refer to Figure 4A and 4B , upon determining that at least one of the downlink data or the SPS activation or release for the multicast group has not been successfully received, at least one UE in the set of UEs 404a-c may receive a retransmission of at least one of the downlink data or the SPS activation or release for the multicast group. Figure 5A and 5B , upon determining that at least one of the downlink data or the SPS activation or release for the multicast group is not successfully received, at least one UE in the UE set 504 / 504' may receive a retransmission of at least one of the downlink data or the SPS activation or release for the multicast group. Figure 6 Upon determining that at least one of the downlink data or the SPS activation or release for the multicast group is not successfully received, one of the UEs 604a-b may receive a retransmission of at least one of the downlink data or the SPS activation or release for the multicast group.

[0238] Fig.111 is a flow chart of a wireless communication method 1100. The method 1100 may be performed by a base station. For example, the method 1100 may be performed by a base station 102 / 180, 310, 402, 502 / 502', 602, and / or the method 1100 may be performed by a device 1702 / 1702'. In another example, the method 1100 may be performed by a processing system 1814, which may include a memory 376 and may be the entire base station 102 / 180, 310, 402, 502 / 502', 602 or a component of the base station 102 / 180, 310, 402, 502 / 502', 602 (such as a TX processor 316, an RX processor 370, and / or a controller / processor 375). According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed concurrently.

[0239] At 1102, the base station may receive corresponding capability information from each UE in the set of UEs, the capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception (e.g., for beam combining), or a capability for parallel feedback transmission. Each UE in the set of UEs may be configured for SPS (e.g., by the base station via SPS configuration information for broadcast and / or multicast). In some aspects, the corresponding UE capability information may indicate the capabilities of the UE with respect to each of a plurality of CCs and / or each of a plurality of frequency bands. In some aspects, the capability for multicast communication may indicate the number (e.g., the maximum number) of SPS multicast transmissions that the UE is capable of receiving. The capability for multi-beam reception may indicate the number (e.g., the maximum number) of TX beams of the base station that the UE is capable of monitoring (e.g., monitoring downlink SPS transmissions).

[0240] For example, refer to Figure 4A and 4B , the base station 402 may receive capability information from at least one of the set of UEs 404a-c indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission of the at least one UE in the set of UEs 404a-c. Figure 5A and 5B , the base station 502 / 502' may receive capability information indicating at least one of the capability of the at least one UE in the UE set 504 / 504' regarding multicast communication, the capability regarding multi-beam reception, or the capability of parallel feedback transmission from at least one UE in the UE set 504 / 504'. Figure 6 , the base station 602 can receive capability information from at least one UE in the set of UEs 604a-b that can indicate the capability of the at least one UE in the set of UEs 604a-b regarding at least one of multicast communication, multi-beam reception and / or parallel feedback transmission.

[0241] At 1104, the base station may configure a resource set to carry feedback. Each TX beam in the TX beam set may correspond to a corresponding subset of the resource set. The resource set may include uplink resources on an uplink channel. The resource set may be a common resource for a multicast UE group. The common resource may include resources allocated to all UEs in the multicast UE group. On an uplink that may be configured to carry feedback, the common resource may include resources allocated to any or all UEs in the multicast UE group. Therefore, such resources may not be UE-specific; however, such resources may be beam-specific. In some aspects, first, the base station may select resources that have not yet been scheduled, and second, the base station may allocate the selected resources to carry feedback. Third, the base station may assign a corresponding subset of the selected resources to each TX beam in the TX beam set of the base station-for example, the base station may store information indicating an association between each subset of the selected resources and the corresponding TX beam in the TX beam set. In some aspects, the resource set may be or may include a beam-specific feedback resource set on an uplink channel, and each TX beam in the set of TX beams may correspond to a respective subset of the beam-specific feedback resource set.

[0242] For example, refer to Figure 4A and 4B , the base station 402 can configure a resource set to carry feedback, where each TX beam in the set of TX beams 410a-d, indexed 0 to 3, respectively, corresponds to a respective subset of the uplink resource set, which can be associated with a respective one of the indices 0 to 3. For example, referring to Figure 5A and 5B , the base station 502 / 502' may configure a resource set to carry feedback, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the uplink resource set. Figure 6 , the base station 602 can configure a resource set to carry feedback, where each TX beam in the TX beam set corresponds to a corresponding subset of the uplink resource set.

[0243] At 1106, the base station may transmit configuration information indicating a resource set configured to carry feedback to the UE set. The configuration information may be associated with an SPS for multicast, and further, the UE set may be configured with a multicast SPS. In some aspects, the configuration information indicates a subset of the SPS opportunity set for which each UE in the UE set will provide feedback. The subset of the SPS opportunity set may be one SPS opportunity, or the subset of the SPS opportunity set may be two SPS opportunities. The configuration information may further indicate the number of the at least two SPS opportunities to the UE set. In some aspects, the configuration information further indicates that each UE in the UE set will provide feedback indicating ACK feedback when one of the following occurs: the energy associated with the SPS signaling detected on at least one of the at least two SPS opportunities meets a first threshold, or the energy associated with the SPS signaling averaged over the at least two SPS opportunities meets a second threshold.

[0244] For example, refer to Figure 4A and 4B , the base station 402 may transmit SPS configuration information 422 indicating a resource set configured for feedback to the set of UEs 404a-c configured with multicast SPS. Figure 5A and 5B , the base station 502 / 502' may transmit SPS configuration information for broadcast and / or multicast to at least one UE in the UE set 504 / 504', the SPS configuration information indicating an uplink resource set configured for feedback on an uplink channel (e.g., PUCCH). Each TX beam in the TX beam sets of at least one UE in the UE set 504 / 504', indexed from 0 to 3, respectively, may correspond to a corresponding subset of the uplink resource set, which may be associated with a corresponding one of the indexes 0 to 3. For example, referring to Figure 6 The base station 602 may transmit SPS configuration information for broadcast and / or multicast to the set of UEs 604a-b, the SPS configuration information indicating a set of uplink resources configured for feedback on an uplink channel (eg, PUCCH).

[0245] At 1108, the base station may transmit SPS signaling to the set of UEs via the TX beam set on each SPS opportunity in the set of SPS opportunities. In some aspects, the SPS signaling may include a set of reference signals, synchronization signals, and / or pilot signals, such as CSI-RS, SSB, pilot signals, etc. In some other aspects, the SPS signaling may include a set of control signals on the MCCH carried on the downlink data channel. In yet further aspects, the SPS signaling may include SPS data.

[0246] For example, refer to Figure 4A and 4B, the base station 402 may transmit a first set of SPS signals 424 to the set of UEs 404a-c via the set of TX beams 410a-d on each SPS opportunity in the set of SPS opportunities. Figure 5A and 5B , the base station 502 / 502' can transmit SPS signaling to the UE set 504 / 504' via the TX beam set at each SPS opportunity in the SPS opportunity set. Figure 6 , the base station 602 can transmit SPS signaling to the set of UEs 604a-b via the TX beam set on each SPS opportunity in the SPS opportunity set.

[0247] At 1110, the base station may receive feedback from the set of UEs on one or more subsets of the resource set based on the SPS signaling. The feedback may be associated with SPS signaling on a subset of the SPS opportunity set (such as one SPS opportunity or at least two SPS opportunities). The feedback may indicate one of an ACK or a NACK associated with the SPS signaling. In some aspects, feedback may be received from a corresponding UE in the set of UEs on at least one subset in the resource set corresponding to at least one TX beam in the set of TX beams. In some aspects, feedback may be received on each subset in the beam-specific feedback resource set corresponding to a TX beam via which at least one UE in the set of UEs in the set of TX beams receives at least one first signal in the set of first signals.

[0248] For example, refer to Figure 4A and 4B , the base station 402 may receive a set of response signals 426a-c from the set of UEs 404a-c on one or more subsets of the resource set based on the first signal set 424. The one or more subsets of the resource set may correspond to one or more TX beams in the set of TX beams 410a-d, respectively, to indicate ACK or NACK feedback for one or more TX beams in the set of TX beams 410a-d. For example, referring to Figure 5A and 5B , the base station 502 / 502' may receive feedback from the UE set 504 / 504' on one or more subsets of the resource set corresponding to one or more TX beams in the TX beam set, respectively, based on the SPS signaling, and the feedback may indicate one of ACK or NACK. Figure 6 The base station 602 may receive feedback from the set of UEs 604a-b on one or more subsets in the resource set corresponding to one or more TX beams in the set of TX beams, respectively, based on the SPS signaling, and the feedback may indicate one of ACK or NACK.

[0249] Fig.121 is a flow chart of a wireless communication method 1200. The method 1200 may be performed by a base station. For example, the method 1200 may be performed by at least one of the base stations 102 / 180, 310, 402, 502 / 502', 602, and / or the method 1200 may be performed by the device 1702 / 1702'. In another example, the method 1200 may be performed by a processing system 1814, which may include a memory 376 and may be the entire base station 102 / 180, 310, 402, 502 / 502', 602 or a component of the base station 102 / 180, 310, 402, 502 / 502', 602 (such as a TX processor 316, an RX processor 370, and / or a controller / processor 375).

[0250] In some respects, Fig.12 The method 1200 may be combined with Fig.11 The method 1100 can be practiced. For example, Fig.12 Some example operations of 1104 are illustrated, as well as some example operations that may be practiced after 1104, within 1104, or at another time. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed contemporaneously.

[0251] In some aspects, to configure a resource set to carry feedback, wherein each TX beam in the set of TX beams corresponds to a respective subset of the resource set, as defined by Fig.11 As explained in 1104, the base station may practice or execute Fig.12 1202 and 1204.

[0252] At 1202, a base station may configure a beam-specific set of ACK resources on an uplink channel, wherein each TX beam in a TX beam set corresponds to a respective subset of the beam-specific set of ACK resources. In some aspects, first, the base station may select resources that have not yet been scheduled, and second, the base station may allocate the selected resources that are beam-specific with respect to the TX beam set of the base station to carry ACK feedback. Third, the base station may assign the respective subset of the selected resources to each TX beam in the TX beam set of the base station—e.g., the base station may store information indicating an association between each subset of the selected resources and the respective TX beam in the TX beam set.

[0253] For example, refer to Figure 4A and 4B , the base station 402 may configure a beam-specific ACK resource set on the uplink channel, wherein each TX beam in the set of TX beams 410a-d corresponds to a respective subset of the beam-specific ACK resource set. Figure 5A and 5B, the base station 502 / 502' may configure a beam-specific ACK resource set on the uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific ACK resource set. Figure 6 , the base station 602 may configure a beam-specific ACK resource set on the uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific ACK resource set. Fig.11 In the context of, the resource set described in method 1100 may be or may include a beam-specific ACK resource set on an uplink channel.

[0254] At 1204, the base station may configure a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a respective subset of the beam-specific NACK resource set. In some aspects, first, the base station may select other resources that have not yet been scheduled, and second, the base station may allocate the selected other resources that are beam-specific with respect to the TX beam set of the base station to carry NACK feedback. Third, the base station may assign a respective other subset of the selected other resources to each TX beam in the TX beam set of the base station—for example, the base station may store information indicating an association between each other subset of the selected other resources and a respective TX beam in the TX beam set.

[0255] For example, refer to Figure 4A and 4B , the base station 402 may configure a beam-specific NACK resource set on the uplink channel, wherein each TX beam in the set of TX beams 410a-d corresponds to a respective subset of the beam-specific NACK resource set. Figure 5A and 5B , the base station 502 / 502' may configure a beam-specific NACK resource set on the uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific NACK resource set. Figure 6 , the base station 602 may configure a beam-specific NACK resource set on the uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific NACK resource set. Fig.11 In the context of, the resource set described in method 1100 may be or may include a beam-specific NACK resource set on an uplink channel.

[0256] At 1206, the base station may receive ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to a TX beam in the TX beam set via which the SPS data was successfully received by at least one UE in the UE set. The ACK feedback may indicate to the base station that at least one UE in the UE set has successfully received the SPS data via one or more TX beams in the TX beam set corresponding to the beam-specific ACK resource set on which the ACK feedback was received.

[0257] For example, refer to Figure 4A and 4B , the base station 402 may receive at least one corresponding response signal 426a-c, which may indicate ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beams via which at least one UE in the set of UEs 404a-c in the set of TX beams 410a-d successfully received the SPS data (e.g., the first signal(s) 424 may include the SPS data). For example, referring to Figure 5A and 5B , the base station 502 / 502' may receive ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beam through which at least one UE in the UE set 504 / 504' in the TX beam set successfully received the SPS data. Figure 6 The base station 602 may receive ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to a TX beam through which at least one UE in the UE set 504 / 504' in the TX beam set successfully received the SPS data.

[0258] At 1208, the base station may receive NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to a TX beam in the TX beam set via which at least one UE in the set of UEs did not successfully receive the SPS data. The NACK feedback may indicate to the base station that at least one UE in the set of UEs did not successfully receive the SPS data via one or more TX beams in the TX beam set corresponding to the beam-specific NACK resource set on which the NACK feedback was received.

[0259] For example, refer to Figure 4A and 4B, the base station 402 may receive at least one corresponding response signal 426a-c that may indicate NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beams through which at least one UE in the set of UEs 404a-c in the set of TX beams 410a-d did not successfully receive the SPS data (e.g., the first signal(s) 424 may include the SPS data). For example, referring to Figure 5A and 5B , the base station 502 / 502' may receive NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam through which at least one UE in the UE set 504 / 504' in the TX beam set did not successfully receive the SPS data. Figure 6 , one of the base stations 602 can receive NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam through which at least one UE in the set of UEs 604a-b in the TX beam set did not successfully receive the SPS data.

[0260] At 1210, the base station may retransmit the SPS data via each TX beam in the TX beam set corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback was received. Figure 4A and 4B , the base station 402 may retransmit at least one second set of SPS signals 428, which may include retransmissions of SPS data, via each TX beam in the set of TX beams 410a-d corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback was received. Figure 5A and 5B , the base station 502 / 502' may retransmit the SPS data via each TX beam in the TX beam set corresponding to the subset of the beam-specific NACK resource set on which the NACK feedback is received. Figure 6 , one of the base stations 602 may retransmit the SPS data via each TX beam in the TX beam set corresponding to a subset in the beam-specific NACK resource set on which the NACK feedback was received.

[0261] Fig.131 is a flow chart of a wireless communication method 1300. For example, the method 1200 may be performed by a base station 102 / 180, 310, 402, 502 / 502', 602, and / or the method 1200 may be performed by a device 1702 / 1702'. In another example, the method 1200 may be performed by a processing system 1814, which may include a memory 376 and may be the entire base station 102 / 180, 310, 402, 502 / 502', 602 or a component of the base station 102 / 180, 310, 402, 502 / 502', 602 (such as a TX processor 316, an RX processor 370, and / or a controller / processor 375).

[0262] In some respects, Fig.13 The method 1300 may be combined with Fig.11 The method 1100 can be practiced. For example, Fig.13 Some example operations of 1108 are illustrated, as well as some example operations that may be practiced before, within, or elsewhere at 1108. According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed contemporaneously.

[0263] At 1302, a base station may transmit information indicating a TX beam set to a set of UEs. Each UE in the set of UEs may be configured for SPS (e.g., by the base station via SPS configuration information for broadcast and / or multicast). In some aspects, the information indicating the TX beam set may indicate the number of beams of the base station and a bit map having each bit corresponding to a corresponding one of the beams of the base station. In the bit map, a first bit value (e.g., "1") may indicate that a corresponding one of the beams is included in the TX beam set, and a second bit value (e.g., "0") may indicate that a corresponding one of the beams is excluded from the TX beam set. For example, the TX beam set may include an active TX beam set (e.g., beams via which the base station is configured to transmit SPS data or other information), such that a first bit value in the bit map may indicate that a beam is included in the active TX beam set, and a second bit value in the bit map indicates that a beam is excluded from the active TX beam set.

[0264] In some aspects, to transmit SPS signaling to a set of UEs via a set of TX beams on each SPS opportunity in a set of SPS opportunities, as described by Fig.11 As explained in 1106, the base station may practice or execute Fig.13 One or more of 1304, 1306, 1308 and / or 1310.

[0265] At 1304, the base station may transmit a first signal set to the UE set on a downlink data channel via the TX beam set. In some aspects, each first signal in the first signal set may be a reference, pilot or synchronization signal, such as a CSI-RS, SSB or other reference signal. In some other aspects, each first signal in the first signal set may include a control signal on the MCCH carried in the downlink data channel. In yet other aspects, the first signal set may include SPS data. The base station may transmit a corresponding subset of the first signal set on each SPS opportunity in the SPS opportunity set.

[0266] For example, refer to Figure 4A and 4B , the base station 402 may transmit a first set of signals 424 to the set of UEs 404a-c on a downlink data channel via the set of TX beams 410a-d. Figure 5A and 5B , the base station 502 / 502' may transmit at least one first signal to the UE set 504 / 504' on the downlink data channel via the TX beam set. Figure 6 , one of the base stations 602 may transmit at least one first signal to the set of UEs 604a-b on a downlink data channel via a set of TX beams.

[0267] At 1306, the base station may receive measurement information associated with at least one TX beam in the TX beam set from at least one UE in the set of UEs on an uplink channel. In some aspects, the measurement information may include one or more values ​​(e.g., one or more measured values ​​or one or more average values) that satisfy a threshold, wherein each of the one or more values ​​is associated with a corresponding TX beam in the at least one TX beam in the set of TX beams. In some other aspects, the measurement information may include an energy measurement corresponding to the at least one TX beam in the set of TX beams. In still other aspects, the measurement information may include at least one value (e.g., at least one of RSRP, RSSI, RSRQ, SNR, and / or other channel quality values) indicating channel quality, signal strength, etc. associated with the at least one TX beam in the set of TX beams. In some aspects, the measurement information may include a measurement associated with SPS signaling received on one SPS opportunity in the set of SPS opportunities. In some other aspects, the measurement information may include an average of at least two measurements associated with SPS signaling received on at least two SPS opportunities in the set of SPS opportunities. For example, referring to Figure 4A and 4B, the base station 402 may receive one response signal set in the response signal set 426a-c indicating at least one TX beam in the set of TX beams 410a-d from at least one UE in the set of UEs 404a-c on the uplink channel, wherein the response signal set in the response signal set 426a-c includes measurement information associated with at least one TX beam in the set of TX beams 410a-d. For example, referring to Figure 5A and 5B , the base station 502 / 502' may receive a response signal(s) indicating at least one TX beam in the TX beam set from at least one UE in the UE set 504 / 504' on an uplink channel, wherein the response signal(s) include measurement information associated with the at least one TX beam in the TX beam set. For example, referring to Figure 6 , one of the base stations 602 can receive (s) response signals indicating at least one TX beam in the TX beam set from at least one UE in the UE 604a-b set on an uplink channel, wherein the (s) response signal includes measurement information associated with the at least one TX beam in the TX beam subset.

[0268] At 1308, the base station may determine a TX beam subset from the TX beam set based on a set of response signals received from the set of UEs on the one or more subsets of the resource set on an uplink channel. Each response signal in the set of response signals may indicate a TX beam in the TX beam subset. In some aspects, first, the base station may receive a set of response signals from the set of UEs on one or more subsets of the resource set, and second, the base station may identify each TX beam in the TX beam set corresponding to a corresponding subset in the one or more subsets of the resource set. If the feedback received on the corresponding subset in the one or more subsets of the resource set indicates ACK feedback, the base station may include the corresponding TX beam in the TX beam subset. However, if the feedback received on the corresponding subset in the one or more subsets of the resource set indicates NACK feedback, the base station may exclude the corresponding TX beam from the TX beam subset. In some other aspects, the response signal set may include measurement information, and first, the base station may compare at least one value associated with at least one TX beam in the TX beam set (e.g., a measured value or an average value received in the measurement information) with a threshold (such as a threshold associated with satisfactory channel quality, signal strength, etc.). Second, the base station may evaluate whether the at least one value satisfies (e.g., reaches or exceeds) the threshold. Third, when a TX beam in the TX beam set is associated with at least one value that satisfies the threshold, the base station may select the TX beam to be included in the TX beam subset, or when a TX beam in the TX beam set is associated with at least one value that fails to satisfy (e.g., is less than) the threshold, the base station may exclude the TX beam from the TX beam subset.

[0269] For example, refer to Figure 4A and 4B , the base station 402 may determine a TX beam subset including the first, third, and fourth TX beams 410a, 410c, 410d from the set of TX beams 410a-d based on the set of response signals 426a-c received from the set of UEs 404a-c on the one or more subsets of the resource set on the uplink channel. Each response signal in the set of response signals may indicate at least one of the first, third, and fourth TX beams 410a, 410c, 410d included in the TX beam subset. For example, referring to Figure 5A and 5B , the base station 502 / 502' may determine a TX beam subset from the TX beam set based on a set of response signals received from the UE set 504 / 504' on the one or more subsets of the resource set on the uplink channel. Figure 6, one of the base stations 602 may determine a TX beam subset from the TX beam set based on a set of response signals received from the set of UEs 604a-b on the one or more subsets of the resource set on an uplink channel.

[0270] At 1310, the base station may transmit SPS data to the set of UEs on the downlink data channel via the TX beam subset. In some aspects, the SPS data may be transmitted based on UE capability information received from each UE in the set of UEs. In some aspects, the base station may transmit SPS data on each SPS opportunity in the set of SPS opportunities.

[0271] For example, refer to Figure 4A and 4B , the base station may transmit at least one second SPS signal set 428, which may include SPS data transmitted on a downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information received from at least one UE in the set of UEs 404a-c. Figure 5A and 5B , the base station 502 / 502' may transmit SPS data on a downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information received from at least one UE in the UE set 504 / 504'. Figure 6 , one of the base stations 602 may transmit SPS data on a downlink data channel via each TX beam in the TX beam subset associated with feedback or measurement information received from at least one UE in the set of UEs 604a-b.

[0272] Fig.14 1400 is a flow chart of a wireless communication method 1400. The method 1400 may be performed by a base station. For example, the method 1400 may be performed by a base station 102 / 180, 310, 402, 502 / 502', 602, and / or the method 1400 may be performed by a device 1702 / 1702'. In another example, the method 1400 may be performed by a processing system 1814, which may include a memory 376 and may be the entire base station 102 / 180, 310, 402, 502 / 502', 602 or a component of the base station 102 / 180, 310, 402, 502 / 502', 602 (such as a TX processor 316, an RX processor 370, and / or a controller / processor 375). According to various aspects, one or more of the illustrated operations may be swapped, omitted, or performed concurrently.

[0273] At 1402, the base station may transmit information indicating the number of repetitions of retransmissions of multicast SPS activation or release indicated by multicast DCI via at least one of SIB, MCCH, or unicast RRC signaling. In some aspects, the DCI may include information for activating the SPS. In some other aspects, the DCI may include information for releasing the SPS. The information may be transmitted to a set of UEs, and each UE in the set of UEs may be configured with an SPS.

[0274] For example, refer to Figure 4A and 4B , the base station 402 may transmit information indicating the number of repetitions of the retransmissions of the multicast SPS activation or release indicated by the multicast DCI via at least one of the SIB, MCCH, or unicast RRC signaling. Figure 5A and 5B , the base station 502 / 502' may transmit information indicating the number of repetitions of the multicast SPS activation or release indicated by the multicast DCI via at least one of SIB, MCCH or unicast RRC signaling. Figure 6 , one of the base stations 602 may transmit information indicating the number of repetitions of retransmissions of multicast SPS activation or release indicated by the multicast DCI via at least one of SIB, MCCH, or unicast RRC signaling.

[0275] At 1404, the base station may configure each UE in the UE set with a corresponding subset of a UE-specific feedback resource set on an uplink channel. The UE-specific feedback resource set may be configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set. In some aspects, the at least one SPS opportunity in the SPS opportunity set is activated by DCI. In some aspects, first, the base station may select resources that have not yet been scheduled, and second, the base station may allocate the selected resources to carry ACK feedback or NACK feedback. Third, the base station may assign a corresponding subset of the selected resources to each UE in the UE set-for example, the base station may store information indicating the association between each subset of the selected resources and the corresponding UE in the UE set. Fourth, the base station may transmit information indicating a corresponding subset of the UE-specific feedback resource set to each UE in the UE set.

[0276] For example, refer to Figure 4A and 4B, the base station 402 may configure each UE in the set of UEs 404a-c with a corresponding subset of a UE-specific feedback resource set on an uplink channel, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the set of SPS opportunities. For example, referring to Figure 5A and 5B , the base station 502 / 502' may configure each UE in the set of UEs 504 / 504' with a corresponding subset of a UE-specific feedback resource set on an uplink channel, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the set of SPS opportunities. For example, referring to Figure 6 , one of the base stations 602 may configure each UE in the set of UEs 604a-b with a corresponding subset of a UE-specific feedback resource set on an uplink channel, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set.

[0277] At 1406, the base station may configure a beam-specific feedback resource set on an uplink channel, wherein each beam in the set of beams via which downlink data is transmitted corresponds to a respective subset of the beam-specific feedback resource set. The base station may configure the beam-specific feedback resource set to carry NACK feedback associated with downlink data on at least one SPS opportunity in the set of SPS opportunities that is not activated by the DCI. Potentially, the base station may configure the beam-specific feedback resource set so that ACK feedback cannot be carried on the beam-specific feedback resource set.

[0278] For example, refer to Figure 4A and 4B , the base station 402 may configure each beam-specific feedback resource in a beam-specific feedback resource set on an uplink channel, the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. In some aspects, each beam in the set of beams 410a-d of at least one UE in the set of UEs 404a-c corresponds to a respective subset of the beam-specific feedback resource set. For example, referring to Figure 5A and 5B, the base station 502 / 502' may transmit second configuration information indicating a beam-specific feedback resource set on an uplink channel to at least one UE in the UE set 504 / 504', the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. In some aspects, each beam in the beam set of at least one UE in the UE set 504 / 504' corresponds to a respective subset of the beam-specific feedback resource set. For example, referring to Figure 6 , one of the base stations 602 may transmit second configuration information indicating a beam-specific feedback resource set on an uplink channel to at least one UE in the set of UEs 604a-b, the beam-specific feedback resource set being configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the set of SPS opportunities. In some aspects, each beam in the beam set of at least one UE in the set of UEs 604a-b corresponds to a respective subset of the beam-specific feedback resource set.

[0279] The base station may transmit downlink data on a downlink channel to the set of UEs on the set of multicast SPS opportunities at 1408. The base station may transmit the downlink data via a set of beams respectively corresponding to subsets of the beam-specific feedback resource set.

[0280] For example, refer to Figure 4A and 4B , the base station 402 may transmit downlink data to the set of UEs 404a-b on the downlink channel on the set of SPS opportunities. Figure 5A and 5B , the base station 502 / 502' can transmit downlink data to the UE set 504 / 504' on the downlink channel at the SPS opportunity set. Figure 6 , the base station 602 may transmit downlink data on a downlink channel to the set of UEs 604a-b on a set of SPS opportunities.

[0281] At 1410, the base station may determine whether to retransmit at least one of the downlink data or the multicast SPS activation or release indicated by the multicast DCI. In some aspects, first, the base station may receive a signal set on at least one subset of the UE-specific resource set and / or on at least one subset of the beam-specific feedback resource set. Second, the base station may identify whether the signal set includes NACK feedback. If the signal set includes ACK feedback but does not include NACK feedback, the UE may determine to suppress retransmission of downlink data and the multicast SPS activation or release indicated by the multicast DCI. If the signal set includes NACK feedback and the NACK feedback is carried on a subset of the UE-specific feedback resource set, the base station may identify which UE in the UE set transmitted the NACK feedback by identifying which UE in the UE set is configured with the subset of the UE-specific feedback resource set on which the NACK feedback is carried. The base station may determine to retransmit downlink data to a UE in the UE set that is configured with a subset of the UE-specific feedback resource set on which NACK feedback is carried, or at least one of a multicast SPS activation or release indicated by a multicast DCI associated with SPS activation or release. However, if the signal set includes NACK feedback and the NACK feedback is carried on a subset of the beam-specific feedback resource set, the base station may identify which beam in the beam set corresponds to the NACK feedback by identifying which beam in the beam set corresponds to the subset of the beam-specific feedback resource set on which the NACK feedback is carried. Therefore, the base station may determine to retransmit downlink data or at least one of a multicast SPS activation or release indicated by a multicast DCI associated with SPS activation or release via the beam in the beam set that corresponds to the subset of the beam-specific feedback resource set on which NACK feedback is carried.

[0282] For example, refer to Figure 4A and 4B , when the base station 402 receives NACK feedback on at least one subset of the feedback resource set that is specific to the UE and / or at least one subset of the feedback resource set that is specific to the beam, the base station 402 may determine whether to retransmit at least one of the downlink data or the DCI associated with the SPS activation or release. For example, referring to Figure 5A and 5B , when the base station 502 / 502' receives NACK feedback on at least one subset of the UE-specific feedback resource set and / or at least one subset of the beam-specific feedback resource set, the base station 502 / 502' may determine whether to retransmit at least one of the downlink data or the DCI associated with the SPS activation or release. For example, referring to Figure 6When the base station 602 receives NACK feedback on at least a subset of the UE-specific feedback resource set and / or on at least a subset of the beam-specific feedback resource set, the base station 602 can determine whether to retransmit downlink data or at least one of the DCIs associated with SPS activation or release.

[0283] At 1412, when it is determined that at least one of the downlink data or the multicast SPS activation or release indicated by the multicast DCI is to be retransmitted, the base station may retransmit the downlink data or at least one of the multicast SPS activation or release indicated by the multicast DCI. In some aspects, the base station may repeatedly retransmit the multicast SPS activation or release indicated by the multicast DCI, wherein the number of repetitions of the retransmissions is transmitted via at least one of the SIB, MCCH, or unicast RRC signaling (which has information indicating the number of repetitions of the retransmissions of the multicast SPS activation or release indicated by the multicast DCI). In some aspects, the base station may retransmit the multicast SPS activation or release indicated by the multicast DCI in a unicast DCI. The base station may retransmit the multicast SPS activation or release indicated by the multicast DCI in a retransmission window, which may be configured by the base station for a set of UEs. For example, the base station may retransmit the multicast SPS activation or release indicated by the multicast DCI associated with the SPS activation in the first retransmission window, and the base station may retransmit the multicast SPS activation or release indicated by the multicast DCI associated with the SPS release in the second retransmission window, and the second retransmission window may be different from (or the same as) the first retransmission window. In some other aspects, the base station may retransmit downlink data on the SPS opportunity set. In a further aspect, the base station may retransmit downlink data or the multicast SPS activation or release indicated by the multicast DCI to a UE configured with a subset of the UE-specific feedback resource set on which NACK feedback is received (such as by retransmitting downlink data or the multicast SPS activation or release indicated by the multicast DCI via a beam in the beam set covering the UE). Alternatively or additionally, the base station may retransmit downlink data or the multicast SPS activation or release indicated by the multicast DCI via a beam in the beam set corresponding to a subset of the beam-specific feedback resource set on which NACK feedback is received.

[0284] For example, refer to Figure 4A and 4B , the base station 402 may retransmit the at least one of the downlink data or the DCI when determining to retransmit the at least one of the downlink data or the DCI. Figure 5A and 5B , the base station 502 / 502' may retransmit at least one of the downlink data or the multicast SPS activation or release indicated by the multicast DCI when determining to retransmit the downlink data or the multicast SPS activation or release indicated by the multicast DCI. Figure 6The base station 602 may retransmit at least one of the downlink data or the DCI when determining to retransmit at least one of the downlink data or the multicast SPS activation or release indicated by the multicast DCI.

[0285] Fig.15 is a conceptual data flow diagram illustrating an example data flow 1500 between different means / components in an example device 1502. Device 1502 may be a UE.

[0286] In one configuration, the device 1502 may include a transmission component 1506 configured to transmit capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission to the base station 1550, e.g., as described in conjunction with Figure 7 As described in 702.

[0287] The device 1502 may further include a receiving component 1504 that may receive SPS configuration information for broadcast and / or multicast from the base station 1550, the SPS configuration information indicating a resource set configured for feedback, and each TX beam in the TX beam set of the base station 1550 may correspond to a respective subset of the resource set, for example, as described in conjunction with Figure 7 As described in 704. In some aspects, the resource set may be or may include a beam-specific feedback resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a respective subset of the beam-specific feedback resource set.

[0288] The receiving component 1504 can be further configured to receive SPS signaling from the base station 1550 via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set, for example, as described in conjunction with Figure 7 706 described.

[0289] The transmission component 1506 can be further configured to transmit feedback to the base station 1550 on one or more subsets of the resource set corresponding to the one or more TX beams, respectively, based on the SPS signaling, for example, as combined with Figure 7 As described in 706. The feedback may indicate one of an ACK or a NACK associated with the SPS signaling.

[0290] In some aspects, the receiving component 1504 may be further configured to receive first configuration information indicating a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific ACK resource set, e.g., as described in conjunction with Figure 8 As described in 802.

[0291] The device 1502 may further include a configuration component 1512, which may be configured to schedule signaling (eg, a response signal set) on the beam-specific ACK resource set on the uplink channel upon successful receipt of the SPS data.

[0292] The receiving component 1504 can be further configured to receive second configuration information indicating a beam-specific NACK resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific NACK resource set, e.g., as described in conjunction with Figure 8 As described in 804.

[0293] Configuration component 1512 can be further configured to schedule signaling (eg, a response signal set) on an uplink channel on a beam-specific set of NACK resources when SPS data is not successfully received.Configuration component 1512 can provide information to transmission component 1506 indicating the scheduled resources.

[0294] The device 1502 can further include an SPS signaling component 1508 configured to decode the received data and / or control information and provide a status of the decoding to the transmission component 1506 for reporting to the base station 1550. The SPS signaling component 1508 can determine that the data and / or control information is successfully received, such as by performing an error check, a data integrity check, etc., which passes when the data and / or control information is decoded, or determine that the data and / or control information is not successfully received, such as when the error check, the data integrity check, etc. fails.

[0295] The transmission component 1506 can be further configured to transmit ACK feedback associated with the SPS data on each (scheduled) subset of the beam-specific ACK resource set corresponding to the TX beam of the set of TX beams via which the SPS data was successfully received, e.g., as combined with Figure 8 As described in 806.

[0296] However, the transmission component 1506 can be further configured to transmit NACK feedback associated with the SPS data on each (scheduled) subset of the beam-specific NACK resource set corresponding to the TX beam in the set of TX beams via which the SPS data was not successfully received, e.g., as in conjunction with Figure 8 As described in 808.

[0297] The receiving component 1504 can be further configured to receive a retransmission of the SPS data via each TX beam in the set of TX beams corresponding to a subset of the beam-specific NACK resource set on which the NACK feedback is transmitted, e.g., as in conjunction with Figure 8 As described in 810.

[0298] The receiving component 1504 can be further configured to receive information indicating the TX beam set from the base station 1550, for example, as combined with Fig. 9 902. In some aspects, the information indicating the TX beam set may indicate the number of beams of the base station 1550 and a bit map, the bit map having each bit corresponding to a corresponding one of the beams of the base station 1550, and in the bit map, a first bit value (e.g., "1") may indicate that the corresponding one of the beams is included in the TX beam set, and a second bit value (e.g., "0") may indicate that the corresponding one of the beams is excluded from the TX beam set. For example, the TX beam set may include an active TX beam set (e.g., beams via which the base station 1550 is configured to transmit SPS data or other information), such that a first bit value in the bit map may indicate that a beam is included in the active TX beam set, and a second bit value in the bit map indicates that a beam is excluded from the active TX beam set.

[0299] The receiving component 1504 can be further configured to receive a first set of signals from the base station 1550 on a downlink data channel via one or more TX beams in the set of TX beams of the base station 1550, for example, as combined with Fig. 9 904 described. In some aspects, each first signal in the first signal set may be a reference, pilot or synchronization signal, such as a CSI-RS, SSB or other reference signal. In some other aspects, each first signal in the first signal set may include a control signal on the MCCH carried in the downlink data channel. In yet other aspects, the first signal set may include SPS data. The receiving component 1504 may receive a corresponding subset of the first signal set at each SPS opportunity in the SPS opportunity set.

[0300] The device 1502 may further include a beam management component 1510, which may be configured to determine a respective energy corresponding to each first signal in the set of first signals, for example, as combined with Fig. 9 906. In some aspects, the beam management component 1510 may measure the energy of a first signal corresponding to a TX beam in the TX beam set of the base station 1550 in the first signal set on an SPS opportunity in the SPS opportunity set, and / or may average the energies measured from at least two first signals corresponding to a TX beam in the TX beam set of the base station 1550 in the first signal set on at least two SPS opportunities in the SPS opportunity set.

[0301] The beam management component 1510 can be further configured to determine a TX beam subset from the TX beam set based on a first signal set received via one or more TX beams in the TX beam set, for example, as combined with Fig. 9 908 described.

[0302] Transmitting component 1506 can be further configured to transmit a set of response signals indicating the TX beam subset on an uplink channel, for example, as combined with Fig. 9 910. In some aspects, the TX beam subset may be selected by the beam management component 1510. The TX beam subset may be those beams having satisfactory channel quality, signal strength, etc. as reflected by a corresponding measured value associated with each TX beam in the TX beam subset. In some aspects, each response signal in the set of response signals may indicate that a corresponding energy corresponding to one of the reference signals received via one of the TX beams in the TX beam subset satisfies a threshold.

[0303] In some other aspects, each response signal in the set of response signals may include an ACK signal corresponding to a respective control signal received via one of the TX beams in the subset of TX beams.

[0304] The transmission component 1506 can be further configured to transmit measurement information associated with at least one TX beam in the TX beam subset to the base station 1550 on the uplink channel, for example, as combined with Fig. 9 The measurement information may include one or more values ​​(e.g., one or more measured values ​​or one or more average values) that satisfy the threshold, wherein each of the one or more values ​​is associated with a corresponding one of the TX beams in the TX beam subset. In some aspects, the measurement information may include each determined energy value corresponding to a corresponding one of the first signals in the set of first signals received via the TX beam subset.

[0305] The receiving component 1504 can be further configured to receive SPS data from the base station 1550 on a downlink data channel via the TX beam subset, for example, as described in conjunction with Fig. 9 In some aspects, SPS data can be received based on capability information transmitted by transmission component 1506 to base station 1550.

[0306] In another configuration, the receiving component 1504 may be configured to receive information indicating a repetition number of retransmissions of the DCI via at least one of SIB, MCCH, or unicast RRC signaling, for example, as described in conjunction with Fig.10 As described in 1002. In some aspects, the retransmission of the DCI can be based on the number of repetitions.

[0307] In the other configuration, the receiving component 1504 can be further configured to receive first configuration information indicating a UE-specific feedback resource set on an uplink channel from the base station 1550, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set, for example, as combined with Fig.10 As described in 1004.

[0308] In this another configuration, the receiving component 1504 can be further configured to receive second configuration information indicating a beam-specific feedback resource set on an uplink channel from the base station 1550, the beam-specific feedback resource set configured to carry NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set that is not activated by the DCI, e.g., as in conjunction with Fig.10 As described in 1006. Each beam in the beam set of the base station 1550, through which downlink data is to be received, may correspond to a corresponding subset of the feedback resource set that differs from one beam to another.

[0309] In this other configuration, the SPS signaling component 1508 can be configured to determine whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or an SPS activation or release for a multicast group indicated by a DCI associated with the SPS activation or release is not successfully received from the base station 1550, for example, as described in conjunction with Fig.10 As described in 1008.

[0310] In this other configuration, the transmission component 1506 can be configured to transmit one of ACK feedback or NACK feedback on a UE-specific feedback resource set based on whether downlink data is successfully received from the base station 1550 on at least one SPS opportunity in the SPS opportunity set, for example, as combined with Fig.10 1010 as described.

[0311] In this other configuration, the transmission component 1506 can be further configured to transmit NACK feedback on each subset of the beam-specific feedback resource set corresponding to a beam in the set of beams via which downlink data was not successfully received from the base station 1550 on at least one SPS opportunity that was not activated by the DCI in the set of SPS opportunities, for example, as combined with Fig.10 As described in 1012. In some aspects, retransmission of at least one of downlink data or DCI is based on transmission of at least one of NACK feedback on a UE-specific feedback resource set or NACK feedback on a beam-specific feedback resource set.

[0312] In this other configuration, the receiving component 1504 can be further configured to receive a retransmission of at least one of the downlink data or the DCI upon determining that at least one of the downlink data or the DCI was not successfully received, e.g., as in conjunction with Fig.10 1014 described.

[0313] Device 1502 may include executing the aforementioned Figure 4B Call flow diagram and / or Figures 7 to 10 The additional components of each box of the algorithm in the flowchart. Figure 4B Call flow diagram and / or Figures 7 to 10 Each block in the flowchart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0314] Fig.16 1600 is a diagram illustrating an example of a hardware implementation of a device 1502' employing a processing system 1614. The processing system 1614 may be implemented with a bus architecture generally represented by a bus 1624. Depending on the specific application of the processing system 1614 and the overall design constraints, the bus 1624 may include any number of interconnecting buses and bridges. The bus 1624 links various circuits together, including one or more processors and / or hardware components (represented by the processor 1604, components 1504, 1506, 1508, 1510, 1512, and computer readable medium / memory 1606). The bus 1624 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0315] The processing system 1614 may be coupled to the transceiver 1610. The transceiver 1610 is coupled to one or more antennas 1620. The transceiver 1610 provides a means for communicating with various other devices over a transmission medium. The transceiver 1610 receives signals from the one or more antennas 1620, extracts information from the received signals, and provides the extracted information to the processing system 1614 (specifically, the receiving component 1504). In addition, the transceiver 1610 receives information from the processing system 1614 (specifically, the transmitting component 1506) and generates signals to be applied to the one or more antennas 1620 based on the received information. The processing system 1614 includes a processor 1604 coupled to a computer-readable medium / memory 1606. The processor 1604 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1606. The software, when executed by the processor 1604, causes the processing system 1614 to perform the various functions described above for any particular device. The computer-readable medium / memory 1606 may also be used to store data manipulated by the processor 1604 when executing software. The processing system 1614 further includes at least one of the components 1504, 1506, 1508, 1510, 1512. These components may be software components running in the processor 1604, software components resident / stored in the computer-readable medium / memory 1606, one or more hardware components coupled to the processor 1604, or some combination thereof. The processing system 1614 may be a component of the UE 350 and may include the memory 360 and / or at least one of the following: the TX processor 368, the RX processor 356, and the controller / processor 359. Alternatively, the processing system 1614 may be the entire UE (e.g., Figure 3 UE 350).

[0316] In one configuration, the device 1502 / 1502' for wireless communication includes a device for receiving SPS configuration information for broadcast and / or multicast from a base station, the SPS configuration information indicating a resource set configured for feedback, each TX beam in the TX beam set of the base station corresponding to a corresponding subset of the resource set. The device 1502 / 1502' for wireless communication further includes a device for receiving SPS signaling from the base station via one or more TX beams in the TX beam set at each SPS opportunity in the SPS opportunity set. The device 1502 / 1502' for wireless communication includes a device for transmitting feedback to the base station on one or more subsets in the resource set corresponding to the one or more TX beams, respectively, based on the SPS signaling, the feedback indicating one of ACK or NACK.

[0317] In one configuration, the feedback is associated with SPS signaling on a subset of the SPS opportunity set.

[0318] In one configuration, the subset of the set of SPS opportunities includes at least two SPS opportunities.

[0319] In one configuration, the SPS configuration information for broadcast and / or multicast further indicates the number of the at least two SPS opportunities.

[0320] In one configuration, the SPS configuration information for broadcast and / or multicast further indicates that the feedback will indicate an ACK when one of the following: the energy associated with the SPS signaling detected on at least one of the at least two SPS opportunities satisfies a first threshold, or the energy associated with the SPS signaling averaged over the at least two SPS opportunities satisfies a second threshold.

[0321] In one configuration, an apparatus for receiving SPS signaling from a base station is configured to: receive a first signal set from the base station on a downlink data channel via one or more TX beams; determine a TX beam subset from a TX beam set based on the first signal set received via the one or more TX beams; transmit a response signal set indicating the TX beam subset on an uplink channel; and receive SPS data from the base station on a downlink data channel via the TX beam subset.

[0322] In one configuration, the apparatus 1502 / 1502' for wireless communication further includes means for receiving information indicating a TX beam set from a base station.

[0323] In one configuration, the information indicating the TX beam set includes information indicating the number of beams of the base station and a bit map, the bit map having each bit corresponding to a corresponding one of the beams. In the bit map, a first bit value may indicate that the corresponding one of the beams is included in the TX beam set, and a second bit value may indicate that the corresponding one of the beams is excluded from the TX beam set.

[0324] In one configuration, the apparatus 1502 / 1502' for wireless communication further includes means for transmitting measurement information associated with at least one TX beam in the subset of TX beams to a base station on an uplink channel.

[0325] In one configuration, the resource set includes a beam-specific feedback resource set on an uplink channel, each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and a corresponding one of the response signal set is transmitted on each subset in the beam-specific feedback resource set corresponding to a TX beam in the TX beam subset.

[0326] In one configuration, the device 1502 / 1502' for wireless communication further includes a device for determining a corresponding energy corresponding to each first signal in a first signal set, and each first signal in the first signal set includes a reference signal, and each response signal in the response signal set indicates that the corresponding energy corresponding to one of the reference signals received via one TX beam in the TX beam subset satisfies a threshold.

[0327] In one configuration, each first signal in the first signal set includes a control signal on the MCCH carried in the downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to the corresponding control signal received via one TX beam in the TX beam subset.

[0328] In one configuration, an apparatus for receiving SPS configuration information for broadcast and / or multicast is configured to: receive first configuration information indicating a beam-specific ACK resource set on an uplink channel, each TX beam in a TX beam set corresponding to a corresponding subset of the beam-specific ACK resource set; and receive second configuration information indicating a beam-specific NACK resource set on the uplink channel, each TX beam in the TX beam set corresponding to a corresponding subset of the beam-specific NACK resource set, and the beam-specific ACK resource set may be different from the beam-specific NACK resource set.

[0329] In one configuration, the device 1502 / 1502' for wireless communication further includes a device for transmitting ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to the TX beam in the TX beam set via which the SPS data is successfully received; a device for transmitting NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam in the TX beam set via which the SPS data is not successfully received; and a device for receiving a retransmission of the SPS data via each TX beam in the TX beam set corresponding to the subset on which the NACK feedback is transmitted in the beam-specific NACK resource set.

[0330] In one configuration, the apparatus 1502 / 1502' for wireless communication further includes means for transmitting capability information indicating at least one of capability regarding multicast communication, capability regarding multi-beam reception, or capability regarding parallel feedback transmission to a base station, wherein downlink data is received based on the capability information transmitted to the base station.

[0331] In another configuration, the apparatus 1502 / 1502' for wireless communication includes means for determining whether at least one of downlink data on a downlink data channel on at least one multicast SPS opportunity or SPS activation or release for a multicast group indicated by a DCI associated with the SPS activation or release is not successfully received from a base station. In this other configuration, the apparatus 1502 / 1502' for wireless communication includes means for receiving a retransmission of at least one of the downlink data or the DCI when determining that at least one of the downlink data or the DCI is not successfully received.

[0332] In the other configuration, the device 1502 / 1502' for wireless communication further includes a device for receiving first configuration information indicating a UE-specific feedback resource set on an uplink channel from a base station, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set; and a device for receiving second configuration information indicating a beam-specific feedback resource set on an uplink channel from the base station, wherein the beam-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set that is not activated by the DCI. The invention relates to a method for transmitting a NACK feedback associated with downlink data, and each beam in the beam set of the base station through which downlink data is to be received corresponds to a corresponding subset of the beam-specific feedback resource set; a device for transmitting one of ACK feedback or NACK feedback on the UE-specific feedback resource set based on whether the downlink data is successfully received from the base station on at least one SPS opportunity in the SPS opportunity set; and a device for transmitting NACK feedback on each subset in the beam-specific feedback resource set corresponding to a beam in the beam set through which downlink data is not successfully received from the base station on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. In some aspects, retransmission of at least one of the downlink data or the DCI is based on transmitting at least one of the NACK feedback on the UE-specific feedback resource set or the NACK feedback on the beam-specific feedback resource set.

[0333] In this other configuration, the apparatus 1502 / 1502' for wireless communication may further include means for receiving information indicating a repetition number of retransmissions of the DCI via at least one of SIB, MCCH, or unicast RRC signaling, and the retransmissions of the DCI may be based on the repetition number.

[0334] The aforementioned means may be one or more components of the aforementioned components of the device 1502 and / or the processing system 1614 of the device 1502' configured to perform the functions recited by the aforementioned means. As described above, the processing system 1614 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the aforementioned means.

[0335] Fig.17 is a conceptual data flow diagram illustrating an example data flow 1700 between different means / components in an example apparatus 1702. Apparatus 1702 may be a base station.

[0336] The device 1702 may include a receiving component 1704 that may be configured to receive, from each UE in the set of UEs including the UE 1750, respective capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission, e.g., as described in conjunction with Fig.11 As described in 1102.

[0337] In one configuration, downlink data may be transmitted to a set of UEs based on respective capability information received from each UE in the set of UEs.

[0338] In one configuration, the device 1702 may further include a beam management component 1710 that may configure a resource set to carry feedback, wherein each TX beam in the set of TX beams corresponds to a respective subset of the resource set, e.g., as in conjunction with Fig.11 As described in 1104.

[0339] The device 1702 may further include a transmission component 1706 configured to transmit configuration information indicating a resource set to a set of UEs (including UE 1750), wherein the configuration information is associated with the SPS, for example, as described in conjunction with Fig.11 As described in 1106.

[0340] The transmission component 1706 can be further configured to transmit SPS signaling to the set of UEs (including UE 1750) via the TX beam set on each SPS opportunity in the set of SPS opportunities, for example, as combined with Fig.11 As described in 1108.

[0341] The receiving component 1704 can be further configured to receive feedback from the set of UEs (including UE 1750) on one or more subsets of the resource set based on the SPS signaling, wherein the feedback indicates one of an ACK or a NACK associated with the SPS signaling, e.g., as combined with Fig.11 1110 described above. Feedback may be received from a corresponding UE of a UE set (including UE 1750) on one or more subsets corresponding to one or more TX beams in a TX beam set in a resource set, wherein the feedback is associated with SPS signaling on a subset of an SPS opportunity set. The subset associated with the feedback in the SPS opportunity set for SPS signaling may include at least two SPS opportunities, and the configuration information may further indicate the number of the at least two SPS opportunities to the UE set (including UE 1750). The configuration information may further indicate that the feedback will indicate ACK when one of the following: the energy associated with the SPS signaling detected on at least one of the at least two SPS opportunities satisfies a first threshold, or the energy associated with the SPS signaling averaged over the at least two SPS opportunities satisfies a second threshold.

[0342] In one configuration, the configuration component 1712 can configure a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific ACK resource set, e.g., as combined with Fig.12 As described in 1202.

[0343] Further, the configuring component 1712 can configure a beam-specific NACK resource set on the uplink channel, wherein each TX beam in the set of TX beams corresponds to a respective subset of the beam-specific NACK resource set, and the beam-specific ACK resource set is different from the beam-specific NACK resource set, e.g., as combined with Fig.12 As described in 1204.

[0344] The receiving component 1704 can be further configured to receive ACK feedback associated with the SPS data on each subset of the beam-specific ACK resource set corresponding to a TX beam via which at least one UE in the set of UEs in the set of TX beams successfully received the SPS data, e.g., as combined with Fig.12 1206 described.

[0345] The receiving component 1704 can be further configured to receive NACK feedback associated with the SPS data on each subset of the beam-specific NACK resource set corresponding to the TX beam via which at least UE 1750 in the set of UEs in the set of TX beams failed to successfully receive the SPS data, e.g., as combined with Fig.12 As described in 1208.

[0346] The SPS signaling component 1708 can provide the SPS data for retransmission to the transmission component 1706. The transmission component 1706 can be further configured to retransmit the SPS data via each TX beam in the TX beam set corresponding to a subset of the beam-specific NACK resource set via which the NACK feedback was received, for example, as combined with Fig.12 1210 as described.

[0347] Transmitting component 1706 can be further configured to transmit information indicating the TX beam set to the set of UEs, for example, as combined with Fig.13 1302 described.

[0348] Transmitting component 1706 may be further configured to transmit a first set of signals to a set of UEs (including UE 1750) on a downlink data channel via a set of TX beams, e.g., as combined with Fig.13 1304 described.

[0349] The receiving component 1704 can be further configured to receive measurement information associated with at least one TX beam in the TX beam set from at least UE 1750 in the UE set on an uplink channel, for example, as combined with Fig.13 1306. In some aspects, the resource set includes a beam-specific feedback resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and at least one response signal in the response signal set is received on each subset in the beam-specific feedback resource set corresponding to a TX beam in the TX beam set at which at least UE 1750 in the UE set receives at least one first signal in the first signal set.

[0350] The beam management component 1710 can be further configured to determine a TX beam subset from the TX beam set based on a set of response signals received from a set of UEs (including UE 1750), for example, as combined with Fig.13 1308 described.

[0351] The beam management component 1710 may determine the TX beam subset based on the measurement information. In one configuration, each first signal in the first signal set includes a reference signal, and each response signal in the response signal set indicates that energy detected from one of the reference signals transmitted via one of the TX beams in the TX beam set satisfies a threshold. In one configuration, each first signal in the first signal set includes a control signal on an MCCH carried in a downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to a corresponding control signal transmitted via one of the TX beams in the TX beam set.

[0352] Transmitting component 1706 may be further configured to transmit SPS data to a set of UEs (including UE 1750) on a downlink data channel via a TX beam subset, e.g., as in conjunction with Fig.13 1310 as described.

[0353] In another configuration, the transmission component 1706 may be configured to transmit information indicating a repetition number of retransmissions of the DCI (e.g., in at least one retransmission threshold) via at least one of SIB, MCCH, or unicast RRC signaling, e.g., as in conjunction with Fig.14 As described in 1402.

[0354] In the other configuration, the configuring component 1712 can configure each UE in the set of UEs (including the UE 1750) with a respective subset of a UE-specific feedback resource set on an uplink channel, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the set of SPS opportunities, e.g., as in conjunction with Fig.14 1404 described.

[0355] In this further configuration, the configuring component 1712 can further configure a beam-specific feedback resource set on the uplink channel, wherein each beam in the set of beams via which downlink data is transmitted corresponds to a respective subset of the beam-specific feedback resource set, e.g., as in conjunction with Fig.14 1406 described.

[0356] The beam-specific feedback resource set may be configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by the DCI in the SPS opportunity set. The SPS signaling component 1708 may determine that at least one of the downlink data or the DCI is to be retransmitted when at least one subset of the UE-specific feedback resource set carries NACK feedback or at least one subset of the beam-specific feedback resource set carries NACK feedback.

[0357] In this other configuration, the transmission component 1706 can be configured to transmit downlink data on a downlink data channel to a set of UEs (including UE 1750) on a set of SPS opportunities, for example, as combined with Fig.14 1408 described.

[0358] In this other configuration, the SPS signaling component 1708 can be configured to determine whether to retransmit at least one of the downlink data or the DCI associated with the SPS activation or release, for example, as combined with Fig.14 1410 as described.

[0359] In this other configuration, the transmission component 1706 can be configured to retransmit the at least one of the downlink data or the DCI when determining to retransmit the at least one of the downlink data or the DCI, for example, as combined with Fig.14 1412 described.

[0360] Device 1702 may include executing the aforementioned Figure 4B Call flow diagram and / or Figures 11 to 14 The additional components of each box of the algorithm in the flowchart. Figure 4B Call flow diagram and / or Figures 11 to 14 Each block in the flowchart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0361] Fig.18 1800 is a diagram illustrating an example of a hardware implementation of a device 1702' employing a processing system 1814. The processing system 1814 may be implemented with a bus architecture generally represented by a bus 1824. Depending on the specific application of the processing system 1814 and the overall design constraints, the bus 1824 may include any number of interconnecting buses and bridges. The bus 1824 links together various circuits including one or more processors and / or hardware components (represented by the processor 1804, components 1704, 1706, 1708, 1710, 1712, and computer readable medium / memory 1806). The bus 1824 may also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further.

[0362] The processing system 1814 may be coupled to the transceiver 1810. The transceiver 1810 is coupled to one or more antennas 1820. The transceiver 1810 provides a means for communicating with various other devices via a transmission medium. The transceiver 1810 receives signals from the one or more antennas 1820, extracts information from the received signals, and provides the extracted information to the processing system 1814 (specifically, the receiving component 1704). In addition, the transceiver 1810 receives information from the processing system 1814 (specifically, the transmission component 1706) and generates signals to be applied to the one or more antennas 1820 based on the received information. The processing system 1814 includes a processor 1804 coupled to a computer-readable medium / memory 1806. The processor 1804 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 1806. The software, when executed by the processor 1804, causes the processing system 1814 to perform the various functions described above for any particular device. The computer-readable medium / memory 1806 may also be used to store data manipulated by the processor 1804 when executing software. The processing system 1814 further includes at least one of the components 1704, 1706, 1708, 1710, 1712. These components may be software components running in the processor 1804, software components resident / stored in the computer-readable medium / memory 1806, one or more hardware components coupled to the processor 1804, or some combination thereof. The processing system 1814 may be a component of the base station 310 and may include the memory 376 and / or at least one of the following: the TX processor 316, the RX processor 370, and the controller / processor 375. Alternatively, the processing system 1814 may be the entire base station (e.g., see Figure 3 Base station 310).

[0363] In one configuration, an apparatus 1702 / 1702' for wireless communication includes means for configuring a resource set to carry feedback, wherein each TX beam in a TX beam set corresponds to a respective subset of the resource set. The apparatus 1702 / 1702' further includes means for transmitting configuration information indicating a resource set to a set of UEs, wherein the configuration information is associated with an SPS. The apparatus 1702 / 1702' further includes means for transmitting SPS signaling to the set of UEs via the TX beam set at each SPS opportunity in a set of SPS opportunities. The apparatus 1702 / 1702' further includes means for receiving feedback from the set of UEs on one or more subsets of the resource set based on the SPS signaling, the feedback indicating one of an ACK or a NACK associated with the SPS signaling.

[0364] In one configuration, each feedback may be received from a corresponding UE in the set of UEs on one or more subsets of a resource set corresponding to one or more TX beams in the set of TX beams, wherein the feedback is associated with SPS signaling on a subset of the set of SPS opportunities.

[0365] In one configuration, the subset of the SPS opportunity set of SPS signaling associated with the feedback includes at least two SPS opportunities.

[0366] In one configuration, the configuration information further indicates to the set of UEs the number of the at least two SPS opportunities.

[0367] In one configuration, the configuration information further indicates that the feedback will indicate ACK when one of the following: the energy associated with the SPS signaling detected on at least one of the at least two SPS opportunities meets a first threshold, or the energy associated with the SPS signaling averaged on the at least two SPS opportunities meets a second threshold.

[0368] In one configuration, a device 1702 / 1702' for wireless communication includes a device for transmitting SPS signaling to a UE set, which is configured to: transmit a first signal set to the UE set on a downlink data channel via a TX beam set; determine a TX beam subset from the TX beam set based on a response signal set received from the UE set on one or more subsets of a resource set on an uplink channel, each response signal in the response signal set indicating a TX beam in the TX beam subset; and transmit SPS data to the UE set on a downlink data channel via the TX beam subset.

[0369] In one configuration, the apparatus 1702 / 1702' for wireless communication includes means for transmitting information indicating a set of TX beams to a set of UEs.

[0370] In one configuration, the information indicating the TX beam set includes information indicating the number of beams of the device 1702 / 1702' and a bitmap having each bit corresponding to a corresponding one of the beams. In the bitmap, a first bit value in the bitmap indicates that the corresponding one of the beams is included in the TX beam set, and a second bit value indicates that the corresponding one of the beams is excluded from the TX beam set.

[0371] In one configuration, the apparatus 1702 / 1702' for wireless communication includes means for receiving measurement information associated with at least one TX beam in the TX beam set from at least one UE in the UE set on an uplink channel, wherein determining a TX beam subset from the TX beam set is further based on the measurement information.

[0372] In one configuration, the resource set includes a beam-specific feedback resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and at least one response signal in the response signal set is received on each subset in the beam-specific feedback resource set corresponding to a TX beam via which at least one UE in the UE set in the TX beam set receives at least one first signal in the first signal set.

[0373] In one configuration, each first signal in the set of first signals includes a reference signal, and each response signal in the set of response signals indicates that energy detected from one of the reference signals transmitted via one of the TX beams in the set of TX beams satisfies a threshold.

[0374] In one configuration, each first signal in the first signal set includes a control signal on the MCCH carried in the downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to the corresponding control signal transmitted via one TX beam in the TX beam set.

[0375] In one configuration, the device 1702 / 1702' for wireless communication includes a device for configuring a beam-specific ACK resource set on an uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific ACK resource set; and a device for configuring a beam-specific NACK resource set on the uplink channel, wherein each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific NACK resource set, and the beam-specific ACK resource set is different from the beam-specific NACK resource set.

[0376] In one configuration, the device 1702 / 1702' for wireless communication includes a device for receiving ACK feedback associated with SPS data on each subset in a beam-specific ACK resource set corresponding to a TX beam via which at least one UE in a UE set in a TX beam set successfully received SPS data; a device for receiving NACK feedback associated with the SPS data on each subset in a beam-specific NACK resource set corresponding to a TX beam via which at least one UE in a UE set in a TX beam set failed to successfully receive SPS data; and a device for retransmitting SPS data via each TX beam in the TX beam set corresponding to the subset in the beam-specific NACK resource set via which NACK feedback was received.

[0377] In one configuration, the device 1702 / 1702' for wireless communication includes a device for receiving corresponding capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission from each UE in a UE set, wherein downlink data is transmitted to the UE set based on the corresponding capability information received from each UE in the UE set.

[0378] In another configuration, the apparatus 1702 / 1702' for wireless communication includes means for transmitting downlink data on a downlink data channel to a set of UEs configured with SPS on an SPS opportunity set. The apparatus 1702 / 1702' further includes means for determining whether to retransmit at least one of the downlink data or the DCI associated with the SPS activation or release. The apparatus 1702 / 1702' further includes means for retransmitting the at least one of the downlink data or the DCI when it is determined that the at least one of the downlink data or the DCI is to be retransmitted.

[0379] In the other configuration, the device 1702 / 1702' for wireless communication further includes a device for configuring each UE in the UE set with a corresponding subset of a UE-specific feedback resource set on an uplink channel, wherein the UE-specific feedback resource set is configured to carry at least one of ACK feedback or NACK feedback associated with downlink data on at least one SPS opportunity in the SPS opportunity set; and a device for configuring a beam-specific feedback resource set on the uplink channel, wherein each beam in the beam set through which downlink data is transmitted corresponds to a corresponding subset of the beam-specific feedback resource set, and the beam-specific feedback resource set is configured to carry NACK feedback associated with downlink data on at least one SPS opportunity that is not activated by DCI in the SPS opportunity set, and determines to retransmit at least one of the downlink data or DCI when at least one subset of the UE-specific feedback resource set carries NACK feedback or at least one subset of the beam-specific feedback resource set carries NACK feedback.

[0380] In the other configuration, the device 1702 / 1702' for wireless communication may further include a device for transmitting information indicating the number of repetitions of retransmission of DCI via at least one of SIB, MCCH or unicast RRC signaling, and when determining to retransmit at least one of the downlink data or the DCI, retransmitting the at least one of the downlink data or the DCI includes retransmitting the DCI based on the number of repetitions.

[0381] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0382] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. Terms such as "if", "when..." and "when..." should be interpreted as meaning "under the condition", rather than implying a direct time relationship or reaction. That is, these phrases (e.g., "when...") do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but only imply that an action will occur when the condition is met, and no specific or immediate time constraints are required for the action to occur. The wording "exemplary" is used in this article to represent "used as an example, instance, or explanation". Any aspect described as "exemplary" herein need not be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" 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 multiple A, multiple B, or multiple 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 of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are currently or hereafter 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 terms “module,” “mechanism,” “element,” “device,” etc. may not be substitutes for the term “means.” Thus, no claim element should be construed as means-plus-function unless the element is explicitly recited using the phrase “means for….”

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving first semi-persistent scheduling (SPS) configuration information for multicast and second SPS configuration information from a network entity, wherein the first SPS configuration information indicates a resource set configured for acknowledgement (ACK) and non-acknowledgement (NACK) feedback on an uplink channel, and the second SPS configuration information indicates a NACK resource set on the uplink channel, wherein the resource set for ACK and NACK feedback is different from the NACK resource set; receiving SPS signaling from the network entity at each SPS opportunity in the SPS opportunity set; as well as Feedback is transmitted to the network entity based on the SPS signaling on the resource set for ACK and NACK feedback or one or more subsets of the NACK resource set, the feedback indicating one of ACK or NACK. 2 . The method of claim 1 , wherein the first SPS configuration information for multicast is based on a common resource for a multicast UE group. 3 . The method of claim 1 , wherein the feedback is associated with the SPS signaling on a subset of the SPS opportunity set. The method of claim 3 , wherein the subset of the set of SPS opportunities includes at least two SPS opportunities. The method of claim 4 , wherein the first SPS configuration information for multicast further indicates the number of the at least two SPS opportunities.

6. The method of claim 4, wherein the first SPS configuration information for multicast further indicates that the feedback will indicate the ACK when one of the following occurs: The energy associated with the SPS signaling detected on at least one SPS opportunity of the at least two SPS opportunities satisfies a first threshold, or Energy associated with the SPS signaling averaged over the at least two SPS opportunities satisfies a second threshold.

7. The method of claim 1, wherein receiving the SPS signaling from the network entity comprises: receiving a first set of signals from the network entity on a downlink data channel via one or more transmit (TX) beams of the network entity; determining a TX beam subset from a set of TX beams of the network entity based on the first set of signals received via the one or more TX beams; transmitting a set of response signals indicating the TX beam subset on the uplink channel; as well as SPS data is received from the network entity on the downlink data channel via the TX beam subset.

8. The method of claim 7, further comprising: Information indicative of the TX beam set is received from the network entity.

9. The method of claim 8, wherein the information indicating the TX beam set comprises information indicating the number of beams of the network entity and a bitmap, the bitmap having each bit corresponding to a corresponding one of the beams, and wherein, A first bit value in the bitmap indicates that a corresponding one of the beams is included in the set of TX beams, and a second bit value in the bitmap indicates that a corresponding one of the beams is excluded from the set of TX beams.

10. The method of claim 7, further comprising: Measurement information associated with at least one TX beam in the subset of TX beams is transmitted to the network entity on the uplink channel.

11. The method of claim 7, wherein the resource set for ACK and NACK feedback comprises a beam-specific feedback resource set on the uplink channel, each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and wherein a corresponding one of the response signal sets is transmitted on each subset in the beam-specific feedback resource set corresponding to a TX beam in the TX beam subset.

12. The method of claim 11, further comprising: determining a respective energy corresponding to each first signal in the first set of signals, Each first signal in the first signal set includes a reference signal, and each response signal in the response signal set indicates that a corresponding energy corresponding to one of the reference signals received via one of the TX beams in the TX beam subset satisfies a threshold.

13. A method as claimed in claim 11, wherein each first signal in the first signal set includes a control signal on a multicast control channel (MCCH) carried in the downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to a corresponding control signal received via one TX beam in the TX beam subset.

14. The method of claim 1, wherein the first SPS configuration information is associated with a first multicast service and the second SPS configuration information is associated with a second multicast service, the first multicast service being different from the second multicast service.

15. The method of claim 1, further comprising: transmitting ACK feedback associated with the SPS data on each subset of the resource set for ACK and NACK feedback corresponding to a TX beam of a set of transmit (TX) beams of the network entity via which the SPS data was successfully received; transmitting NACK feedback associated with the SPS data on each subset of the NACK resource set corresponding to a TX beam in the set of TX beams via which the SPS data was not successfully received; as well as A retransmission of the SPS data is received via each TX beam in the set of TX beams corresponding to a subset in the NACK resource set on which the NACK feedback is transmitted.

16. The method of claim 1, further comprising: transmitting capability information to the network entity, the capability information indicating at least one of a capability regarding multicast communication, a capability regarding multi-beam reception, or a capability regarding parallel feedback transmission, Wherein downlink data is received based on the capability information transmitted to the network entity.

17. A method for wireless communication by a user equipment (UE), comprising: receiving, from a network entity, first configuration information indicating a first feedback resource set on an uplink channel, the first feedback resource set being configured to carry at least one of an acknowledgement (ACK) feedback or a non-acknowledgement (NACK) feedback associated with downlink data on at least one SPS opportunity in a set of semi-persistent scheduling (SPS) opportunities; receiving, from the network entity, second configuration information indicating a second feedback resource set on the uplink channel, the second feedback resource set being configured to carry NACK feedback associated with the downlink data on at least one SPS opportunity in the SPS opportunity set that is not activated by SPS activation or release for the multicast group; determining whether at least one of the downlink data on a downlink data channel on at least one multicast SPS opportunity in the set of SPS opportunities or multicast downlink control information (DCI) indicating activation or release of the SPS for the multicast group is not successfully received from the network entity; transmitting one of ACK feedback or NACK feedback on a first resource in the first feedback resource set based on whether the downlink data or the SPS activation or release is successfully received from the network entity on the at least one multicast SPS opportunity in the SPS opportunity set; transmitting NACK feedback on second resources in the second feedback resource set based on whether the downlink data or the SPS activation or release was not successfully received from the network entity on at least one multicast SPS opportunity in the set of SPS opportunities that was not activated by the SPS activation or release; as well as Retransmission of the downlink data or at least one of the SPS activation or release for the multicast group is received upon determining that at least one of the downlink data or the multicast DCI is not successfully received, wherein the retransmission of the downlink data or at least one of the SPS activation or release is received based on at least one of NACK feedback on the first resource or NACK feedback on the second resource.

18. The method of claim 17, wherein in a case where the multicast DCI indicating the SPS activation or release for the multicast group is not successfully received, the retransmission comprises a unicast DCI indicating the SPS activation or release for the multicast group.

19. The method of claim 17, further comprising: receiving information indicating a number of repetitions of the SPS activation or release for the multicast group via at least one of a system information block (SIB), a multicast control channel (MCCH), or a unicast radio resource control (RRC) signaling, Wherein the retransmission of the SPS activation or release for the multicast group is received based on the repetition number.

20. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving first semi-persistent scheduling (SPS) configuration information for multicast and second SPS configuration information from a network entity, wherein the first SPS configuration information indicates a resource set configured for acknowledgement (ACK) and non-acknowledgement (NACK) feedback on an uplink channel, and the second SPS configuration information indicates a NACK resource set on the uplink channel, wherein the resource set for ACK and NACK feedback is different from the NACK resource set; receiving SPS signaling from the network entity at each SPS opportunity in the SPS opportunity set; as well as Feedback is transmitted to the network entity based on the SPS signaling on the resource set for ACK and NACK feedback or one or more subsets of the NACK resource set, the feedback indicating one of ACK or NACK.

21. The apparatus of claim 20, wherein the first SPS configuration information for multicast is based on a common resource for a multicast UE group.

22. The apparatus of claim 20, wherein the feedback is associated with the SPS signaling on a subset of the SPS opportunity set.

23. The apparatus of claim 22, wherein the subset of the set of SPS opportunities includes at least two SPS opportunities.

24. The apparatus of claim 23, wherein the first SPS configuration information for multicast further indicates the number of the at least two SPS opportunities.

25. The apparatus of claim 23, wherein the first SPS configuration information for multicast further indicates that the feedback is to indicate the ACK when one of: The energy associated with the SPS signaling detected on at least one SPS opportunity of the at least two SPS opportunities satisfies a first threshold, or Energy associated with the SPS signaling averaged over the at least two SPS opportunities satisfies a second threshold.

26. The apparatus of claim 20, wherein to receive the SPS signaling from the network entity, the at least one processor is further configured to: receiving a first set of signals from the network entity on a downlink data channel via one or more transmit (TX) beams of the network entity; determining a TX beam subset from a set of TX beams of the network entity based on the first set of signals received via the one or more TX beams; transmitting a set of response signals indicating the TX beam subset on the uplink channel; as well as SPS data is received from the network entity on the downlink data channel via the TX beam subset.

27. The apparatus of claim 26, wherein the at least one processor is further configured to: Information indicative of the TX beam set is received from the network entity.

28. The apparatus of claim 27, wherein the information indicating the TX beam set comprises information indicating the number of beams of the network entity and a bitmap, the bitmap having each bit corresponding to a corresponding one of the beams, and wherein, A first bit value in the bitmap indicates that a corresponding one of the beams is included in the set of TX beams, and a second bit value in the bitmap indicates that a corresponding one of the beams is excluded from the set of TX beams.

29. The apparatus of claim 26, wherein the at least one processor is further configured to: Measurement information associated with at least one TX beam in the subset of TX beams is transmitted to the network entity on the uplink channel.

30. An apparatus as claimed in claim 26, wherein the resource set for ACK and NACK feedback includes a beam-specific feedback resource set on the uplink channel, each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and wherein a corresponding one of the response signal set is transmitted on each subset of the beam-specific feedback resource set corresponding to a TX beam in the TX beam subset.

31. The apparatus of claim 30, wherein the at least one processor is further configured to: determining a respective energy corresponding to each first signal in the first set of signals, Each first signal in the first signal set includes a reference signal, and each response signal in the response signal set indicates that a corresponding energy corresponding to one of the reference signals received via one of the TX beams in the TX beam subset satisfies a threshold.

32. An apparatus as claimed in claim 30, wherein each first signal in the first signal set includes a control signal on a multicast control channel (MCCH) carried in the downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to a corresponding control signal received via one TX beam in the TX beam subset.

33. The apparatus of claim 20, wherein the first SPS configuration information is associated with a first multicast service and the second SPS configuration information is associated with a second multicast service, the first multicast service being different from the second multicast service.

34. The apparatus of claim 20, wherein the at least one processor is further configured to: transmitting ACK feedback associated with the SPS data on each subset of the resource set for ACK and NACK feedback corresponding to a TX beam of a set of transmit (TX) beams of the network entity via which the SPS data was successfully received; transmitting NACK feedback associated with the SPS data on each subset of the NACK resource set corresponding to a TX beam in the set of TX beams via which the SPS data was not successfully received; as well as A retransmission of the SPS data is received via each TX beam in the set of TX beams corresponding to a subset in the NACK resource set on which the NACK feedback is transmitted.

35. The apparatus of claim 20, wherein the at least one processor is further configured to: transmitting capability information to the network entity, the capability information indicating at least one of a capability regarding multicast communication, a capability regarding multi-beam reception, or a capability regarding parallel feedback transmission, Wherein downlink data is received based on the capability information transmitted to the network entity.

36. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving, from a network entity, first configuration information indicating a first feedback resource set on an uplink channel, the first feedback resource set being configured to carry at least one of an acknowledgement (ACK) feedback or a non-acknowledgement (NACK) feedback associated with downlink data on at least one SPS opportunity in a set of semi-persistent scheduling (SPS) opportunities; receiving, from the network entity, second configuration information indicating a second feedback resource set on the uplink channel, the second feedback resource set being configured to carry NACK feedback associated with the downlink data on at least one SPS opportunity in the SPS opportunity set that is not activated by SPS activation or release for the multicast group; determining whether at least one of the downlink data on a downlink data channel on at least one multicast SPS opportunity in the set of SPS opportunities or multicast downlink control information (DCI) indicating activation or release of the SPS for the multicast group is not successfully received from a network entity; transmitting one of ACK feedback or NACK feedback on a first resource in the first feedback resource set based on whether the downlink data or the SPS activation or release is successfully received from the network entity on the at least one multicast SPS opportunity in the SPS opportunity set; transmitting NACK feedback on second resources in the second feedback resource set based on whether the downlink data or the SPS activation or release was not successfully received from the network entity on at least one multicast SPS opportunity in the set of SPS opportunities that was not activated by the SPS activation or release; as well as Retransmission of the downlink data or at least one of the SPS activation or release for the multicast group is received upon determining that at least one of the downlink data or the multicast DCI is not successfully received, wherein the retransmission of the downlink data or at least one of the SPS activation or release is received based on at least one of NACK feedback on the first resource or NACK feedback on the second resource.

37. The apparatus of claim 36, wherein in a case where the multicast DCI indicating the SPS activation or release for the multicast group is not successfully received, the retransmission comprises a unicast DCI indicating the SPS activation or release for the multicast group.

38. The apparatus of claim 36, wherein the at least one processor is further configured to: receiving information indicating a number of repetitions of the SPS activation or release for the multicast group via at least one of a system information block (SIB), a multicast control channel (MCCH), or a unicast radio resource control (RRC) signaling, Wherein the retransmission of the SPS activation or release for the multicast group is received based on the repetition number.

39. An apparatus for wireless communication by a user equipment (UE), comprising: means for receiving first semi-persistent scheduling (SPS) configuration information for multicast and second SPS configuration information from a network entity, wherein the first SPS configuration information indicates a resource set configured for acknowledgement (ACK) and non-acknowledgement (NACK) feedback on an uplink channel, and the second SPS configuration information indicates a NACK resource set on the uplink channel, wherein the resource set for ACK and NACK feedback is different from the NACK resource set; means for receiving SPS signaling from the network entity on each SPS opportunity in a set of SPS opportunities; as well as Means for transmitting feedback to the network entity based on the SPS signaling on the set of resources for ACK and NACK feedback or one or more subsets of the set of NACK resources, the feedback indicating one of ACK or NACK.

40. The apparatus of claim 39, wherein the first SPS configuration information for multicast is based on a common resource for a multicast UE group.

41. The apparatus of claim 39, wherein the means for receiving the SPS signaling from the network entity is configured to: receiving a first set of signals from the network entity on a downlink data channel via one or more transmit (TX) beams of the network entity; determining a TX beam subset from a set of TX beams of the network entity based on the first set of signals received via the one or more TX beams; transmitting a set of response signals indicating the TX beam subset on the uplink channel; as well as SPS data is received from the network entity on the downlink data channel via the TX beam subset.

42. The apparatus of claim 41, further comprising: Means for receiving information indicative of the TX beam set from the network entity.

43. The apparatus of claim 41, further comprising: means for transmitting, on the uplink channel, to the network entity, measurement information associated with at least one TX beam in the subset of TX beams.

44. An apparatus as claimed in claim 41, wherein the resource set for ACK and NACK feedback includes a beam-specific feedback resource set on the uplink channel, each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and wherein a corresponding one of the response signal set is transmitted on each subset of the beam-specific feedback resource set corresponding to a TX beam in the TX beam subset.

45. The apparatus of claim 44, further comprising: means for determining a respective energy corresponding to each first signal of said first set of signals, Each first signal in the first signal set includes a reference signal, and each response signal in the response signal set indicates that a corresponding energy corresponding to one of the reference signals received via one of the TX beams in the TX beam subset satisfies a threshold.

46. ​​The apparatus of claim 39, wherein the first SPS configuration information is associated with a first multicast service and the second SPS configuration information is associated with a second multicast service, the first multicast service being different from the second multicast service.

47. The apparatus of claim 39, further comprising: means for transmitting ACK feedback associated with the SPS data on each subset of the resource set for ACK and NACK feedback corresponding to a TX beam of a set of transmit (TX) beams of the network entity via which the SPS data was successfully received; means for transmitting NACK feedback associated with the SPS data on each subset of the NACK resource set corresponding to a TX beam in the set of TX beams via which the SPS data was not successfully received; as well as means for receiving a retransmission of the SPS data via each TX beam in the set of TX beams corresponding to a subset of the NACK resource set on which the NACK feedback was transmitted.

48. An apparatus for wireless communication by a network entity, comprising: Memory; as well as at least one processor coupled to the memory and configured to: configuring an acknowledgement (ACK) resource set carrying feedback on an uplink and a non-acknowledgement (NACK) resource set on the uplink, wherein the ACK resource set is different from the NACK resource set; transmitting configuration information indicating the ACK resource set and the NACK resource set to a set of user equipments (UEs), the configuration information being associated with semi-persistent scheduling (SPS) for multicast; Transmitting SPS signaling to the set of UEs on each SPS opportunity in the set of SPS opportunities; as well as Feedback is received from the set of UEs on one or more subsets of the ACK resource set or the NACK resource set based on the SPS signaling, the feedback indicating one of an ACK or a NACK.

49. The apparatus of claim 48, wherein the configuration information associated with an SPS for multicast is based on a common resource for a multicast UE group.

50. An apparatus as described in claim 48, wherein each of the feedback is received from a corresponding UE in the set of UEs on one or more subsets of the ACK resource set corresponding to one or more TX beams in a transmit (TX) beam set of the network entity, and the feedback is associated with the SPS signaling on a subset of the SPS opportunity set.

51. The apparatus of claim 50, wherein the subset of the SPS opportunity set of the SPS signaling associated with the feedback comprises at least two SPS opportunities.

52. The apparatus of claim 51, wherein the configuration information further indicates to the set of UEs a number of the at least two SPS opportunities.

53. The apparatus of claim 50, wherein the configuration information further indicates that the feedback is to indicate the ACK when one of: The energy associated with the SPS signaling detected on at least one SPS opportunity of the at least two SPS opportunities satisfies a first threshold, or Energy associated with the SPS signaling averaged over the at least two SPS opportunities satisfies a second threshold.

54. The apparatus of claim 48, wherein to transmit the SPS signaling to the set of UEs, the at least one processor is further configured to: transmitting a first set of signals to the set of UEs on a downlink data channel via a set of transmit (TX) beams of the network entity; determining a TX beam subset from a TX beam set of the network entity based on a set of response signals received from the set of UEs on the one or more subsets in the ACK resource set or the NACK resource set on the uplink channel, each response signal in the set of response signals indicating a TX beam in the TX beam subset; and SPS data is transmitted to the set of UEs on the downlink data channel via the TX beam subset.

55. The apparatus of claim 54, wherein the at least one processor is further configured to: Information indicating the TX beam set is transmitted to the set of UEs.

56. The apparatus of claim 55, wherein the information indicating the TX beam set comprises information indicating the number of beams of the network entity and a bitmap, the bitmap having each bit corresponding to a respective one of the beams, and wherein, A first bit value in the bitmap indicates that a corresponding one of the beams is included in the set of TX beams, and a second bit value in the bitmap indicates that a corresponding one of the beams is excluded from the set of TX beams.

57. The apparatus of claim 54, wherein the at least one processor is further configured to: receiving measurement information associated with at least one TX beam in the set of TX beams from at least one UE in the set of UEs on the uplink channel, wherein Determining the TX beam subset from among the set of TX beams is further based on the measurement information.

58. An apparatus as described in claim 54, wherein the ACK resource set includes a beam-specific feedback resource set on the uplink channel, each TX beam in the TX beam set corresponds to a corresponding subset of the beam-specific feedback resource set, and wherein at least one response signal in the response signal set is received on each subset in the beam-specific feedback resource set corresponding to a TX beam via which at least one UE in the UE set in the TX beam set receives at least one first signal in the first signal set.

59. The apparatus of claim 54, wherein each first signal in the set of first signals comprises a reference signal, and each response signal in the set of response signals indicates that energy detected from one of the reference signals transmitted via one of the TX beams in the set of TX beams satisfies a threshold.

60. An apparatus as described in claim 54, wherein each first signal in the first signal set includes a control signal on a multicast control channel (MCCH) carried in the downlink data channel, and each response signal in the response signal set includes an ACK signal corresponding to a corresponding control signal transmitted via one TX beam in the TX beam set.

61. The apparatus of claim 48, wherein the configuration information is associated with a first multicast service and a second multicast service, the first multicast service being different than the second multicast service.

62. The apparatus of claim 48, wherein the at least one processor is further configured to: receiving ACK feedback associated with the SPS data on each subset of the ACK resource set corresponding to a TX beam of a transmit (TX) beam set of the network entity via which at least one UE in the set of UEs successfully received the SPS data; receiving NACK feedback associated with the SPS data on each subset of the NACK resource set corresponding to a TX beam in the TX beam set via which at least one UE in the set of UEs failed to successfully receive the SPS data; as well as The SPS data is retransmitted via each TX beam in the TX beam set corresponding to a subset in the NACK resource set via which the NACK feedback is received.

63. The apparatus of claim 48, wherein the at least one processor is further configured to: receiving respective capability information from each UE in the set of UEs, the capability information indicating at least one of a capability for multicast communication, a capability for multi-beam reception, or a capability for parallel feedback transmission; Wherein downlink data is transmitted to the set of UEs based on the corresponding capability information received from each UE in the set of UEs.

64. An apparatus for wireless communication by a network entity, comprising: Memory; as well as at least one processor coupled to the memory and configured to: configuring each of a set of user equipment (UE) with a first set of feedback resources on an uplink channel, the first set of feedback resources being configured to carry at least one of acknowledgement (ACK) feedback or non-acknowledgement (NACK) feedback associated with downlink data on at least one of a set of semi-persistent scheduling (SPS) opportunities; configuring a second feedback resource set on the uplink channel, the second feedback resource set being configured to carry NACK feedback associated with the downlink data on at least one SPS opportunity in the SPS opportunity set that is not activated or released by SPS; transmitting, on a multicast SPS opportunity set in the SPS opportunity set, downlink data or multicast downlink control information (DCI) indicating activation or release of the SPS to a set of UEs configured with the SPS on a downlink data channel; determining whether to retransmit the downlink data or at least one of the SPS activation or release indicated by the multicast DCI based on whether at least one subset of the first feedback resource set carries NACK feedback or whether at least one subset of the second feedback resource set carries NACK feedback; as well as In response to determining that the at least one of the downlink data or the SPS activation or release is to be retransmitted, the downlink data or the at least one of the SPS activation or release is retransmitted.

65. The apparatus of claim 64, wherein the SPS activation or release indicated by the multicast DCI is retransmitted in a unicast DCI if it is determined that the SPS activation or release is to be retransmitted.

66. The apparatus of claim 64, wherein the at least one processor is further configured to: transmitting information indicating a number of repetitions of retransmissions of the SPS activation or release indicated by the multicast DCI via at least one of a system information block (SIB), a multicast control channel (MCCH), or a unicast radio resource control (RRC) signaling, Wherein, in order to retransmit the at least one of the downlink data or the SPS activation or release indicated by the multicast DCI, the at least one processor is configured to retransmit the SPS activation or release indicated by the multicast DCI based on the repetition number.

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