Transmission Configuration Indicator Status Operation for Multicast Transmission

Abstract

Methods, systems, and devices for wireless communication are described. A base station may use beamforming to send control and data transmissions to a set of user equipment (UE). The base station may send downlink control information (DCI) to the UE, which may indicate a set of resource allocations in which the base station may schedule data transmissions and corresponding transmission configuration indicator (TCI) states. The TCI state may indicate a transmission beam that the base station may use to send a data transmission in a particular resource allocation. The UE may receive and decode the DCI and identify resource allocation information and an index that may indicate one or more TCI states for sending a broadcast or unicast transmission to the UE within the resource allocation. The UE may select one or more resource allocations within the resource allocation to monitor for data transmissions and subsequently receive the data transmissions.

Description

[0001] Cross-reference

[0002] This patent application claims the benefit of priority of U.S. Patent Application No. 16 / 987,000, filed on Aug. 6, 2020, by PARK et al., entitled "TRANSMISSION CONFIGURATION INDICATOR STATE OPERATION FOR MULI-POINT TRANSMISSION", which claims the benefit of U.S. Provisional Patent Application No. 62 / 923,120, filed on Oct. 18, 2019, by PARK et al., entitled "TRANSMISSION CONFIGURATION INDICATOR STATE OPERATION FOR MULTI-POINT TRANSMISSION", and the above applications are assigned to the assignee of the present application. Technical Field

[0003] Broadly speaking, the following relates to wireless communication, and more specifically, the following relates to transmission configuration indicator (TCI) state operation for multi-point transmission. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems are capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (e.g., Long Term Evolution (LTE) systems, enhanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication for multiple communication devices (which may also be referred to as user equipment (UE)).

[0005] Some systems (e.g., systems operating in LTE) may support conventional broadcasts without beamforming, such that a base station can send data omnidirectionally to UEs within a cell using the same transmission. Other systems (such as systems operating in the mmW frequency range (e.g., 5G NR frequency range 2 (FR2) networks)) may support beamforming, such that a base station can direct signal energy in a specific direction to enhance reception by a receiving UE and reduce interference to other UEs located in different directions relative to the base station. Thus, for conventional single-cell broadcasts without beamforming and single-cell broadcasts with beamforming, the methods for sending control information and data to UEs may be different. SUMMARY OF THE INVENTION

[0006] The described techniques relate to improved methods, systems, devices, and apparatuses for supporting transmission configuration indicator (TCI) state operation for multi-point transmissions. Generally, the described techniques provide that in some systems (e.g., NR systems, NR-FR2 systems), a base station uses beamforming to send broadcast, multicast, or unicast transmissions to a set of UEs. The base station may send a physical downlink control channel (PDCCH) transmission to one or more UEs, which may include information such as downlink control information (DCI). The DCI may indicate a set of resource allocations (e.g., a set of time slots, symbol periods, frequency bands, frequency sub-bands) in which the base station may schedule data transmissions and a corresponding TCI state that the base station may use to send a data transmission in a respective one of the resource allocations. The TCI state may indicate which transmission beam the base station is using to send a data transmission in a particular resource allocation.

[0007] In some implementations, the base station may configure a UE with multiple sets of active TCI states. A first set of active TCI states may indicate the active TCI states to be used for multicast or broadcast transmissions from the base station to a group of UEs. A second set of active TCI states may indicate the active TCI states to be used for unicast transmissions from the base station to a particular UE. The base station may indicate to the UE which set of active TCI states to use based on how the DCI is scrambled (e.g., scrambled using a cell radio network temporary identifier (C-RNTI) or a group RNTI (G-RNTI)).

[0008] The UE can use various identifiers of the UE (e.g., C-RNTI) or group identifiers (e.g., G-RNTI) to receive DCI and descramble the DCI, or descramble the cyclic redundancy check (CRC) bits of the DCI, or both of the above operations, to determine which TCI state set to use based on which identifier is used to successfully descramble the DCI. The UE can identify an index in the DCI (e.g., TCI code point), which can indicate a specific active TCI state from a unicast or broadcast / multicast TCI state set that can be used to send unicast or broadcast / multicast transmissions to the UE or UE group in a resource allocation. The UE can select one or more resource allocations in the resource allocation to monitor data transmissions and then receive the data transmissions.

[0009] A method for wireless communication by a UE is described. The method may include: receiving DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within each resource allocation in the set of resource allocations, multi-point data transmission is scheduled for transmission; and monitoring the first resource allocation for the multi-point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0010] A device for wireless communication by a UE is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the device to perform the following operations: receiving DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within each resource allocation in the set of resource allocations, multi-point data transmission is scheduled for transmission; and monitoring the first resource allocation for the multi-point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0011] Another device for wireless communication by a UE is described. The device may include units for performing the following operations: receiving DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within each resource allocation in the set of resource allocations, multi-point data transmission is scheduled for transmission; and monitoring the first resource allocation for the multi-point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0012] Describes a non - transitory computer - readable medium storing code for wireless communication by a UE. The code may include instructions executable by a processor to perform the following operations: receiving DCI, the DCI indicating a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states; within each resource allocation in the set of resource allocations, multi - point data transmission is scheduled for transmission; and monitoring the first resource allocation for the multi - point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0013] In some examples of the methods, apparatuses, and non - transitory computer - readable media described herein, receiving the DCI may include operations, features, units, or instructions for performing the following operation: receiving the DCI that may be scrambled using a group identifier of a group including the UE.

[0014] In some examples of the methods, apparatuses, and non - transitory computer - readable media described herein, receiving the DCI may include operations, features, units, or instructions for performing the following operation: receiving the DCI indicating that the set of resource allocations may be a time - domain multiplexing (TDM) set of resource allocations.

[0015] In some examples of the methods, apparatuses, and non - transitory computer - readable media described herein, receiving the DCI may include operations, features, units, or instructions for performing the following operation: receiving the DCI indicating that the TDM set of resource allocations may be a set of time slots or a set of symbol periods.

[0016] In some examples of the methods, apparatuses, and non - transitory computer - readable media described herein, receiving the DCI may include operations, features, units, or instructions for performing the following operation: receiving the DCI indicating that the set of resource allocations may be a frequency - division multiplexing (FDM) set of resource allocations.

[0017] Some examples of the methods, apparatuses, and non - transitory computer - readable media described herein may further include operations, features, units, or instructions for performing the following operation: receiving control signaling indicating a control - channel TCI state of a first transmission beam having a first beam width that may be used to transmit the DCI within a control channel, wherein the DCI may be received within the control channel according to the control - channel TCI state.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first beam width of the control channel transmission beam indicated by the control channel TCI state may be different from the second beam width of the second transmission beam indicated by the first TCI state.

[0019] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control channel TCI state corresponds to a first quasi-co-location relationship with a first reference signal, and the first TCI state corresponds to a second quasi-co-location relationship with a second reference signal.

[0020] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first quasi-co-location relationship is different from the second quasi-co-location relationship.

[0021] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, units, or instructions for performing the following: using the receive beam to receive the multi-point data transmission.

[0022] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the multi-point data transmission may be a broadcast transmission or a multicast transmission.

[0023] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, units, or instructions for performing the following: receiving control signaling that indicates a first set of active TCI states for multi-point data transmission and a second set of active TCI states for unicast data transmission.

[0024] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, units, or instructions for performing the following: decoding the DCI, which may be descrambled from the received bit sequence based on a group identifier assigned to a group including the UE; and selecting the first TCI state from the first set of active TCI states based on indexing the first set of active TCI states using an index derived from the DCI.

[0025] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: decoding a second DCI that may be descrambled from a received bit sequence based on a UE identifier of the UE, the second DCI indicating a second resource allocation for unicast data transmission; selecting a second TCI state from the second set of active TCI states by indexing the second set of active TCI states using an index derived from the second DCI; and monitoring the second resource allocation for the unicast data transmission using a second receive beam corresponding to the second TCI state.

[0026] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, monitoring the second resource allocation may include operations, features, units, or instructions for performing the following: receiving the unicast data transmission via the second resource allocation using the second receive beam.

[0027] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, units, or instructions for performing the following: receiving at least one medium access control (MAC) control element indicating the first set of active TCI states, the second set of active TCI states, or both.

[0028] A method for wireless communication by a base station is described. The method may include: transmitting a DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within the set of resource allocations, multi-point data transmission is scheduled for transmission; and transmitting the multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned to the set of resource allocations from the set of TCI states.

[0029] An apparatus for wireless communication by a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following: transmitting a DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within the set of resource allocations, multi-point data transmission is scheduled for transmission; and transmitting the multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned to the set of resource allocations from the set of TCI states.

[0030] Describes another apparatus for wireless communication by a base station. The apparatus may include units for performing the following operations: transmitting DCI that indicates a resource allocation set and corresponding TCI states assigned to each resource allocation in the resource allocation set from a set of TCI states, within the resource allocation set, multi-point data transmission is scheduled for transmission; and transmitting the multi-point data transmission in each resource allocation in the resource allocation set according to the corresponding TCI states respectively assigned to the resource allocation set from the set of TCI states.

[0031] Describes a non-transitory computer-readable medium storing code for wireless communication by a base station. The code may include instructions executable by a processor to perform the following operations: transmitting DCI that indicates a resource allocation set and corresponding TCI states assigned to each resource allocation in the resource allocation set from a set of TCI states, within the resource allocation set, multi-point data transmission is scheduled for transmission; and transmitting the multi-point data transmission in each resource allocation in the resource allocation set according to the corresponding TCI states respectively assigned to the resource allocation set from the set of TCI states.

[0032] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DCI may include operations, features, units, or instructions for performing the following operations: transmitting the DCI that may be scrambled using a group identifier of a UE group.

[0033] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DCI may include operations, features, units, or instructions for performing the following operations: transmitting the DCI that indicates the resource allocation set may be a TDM resource allocation set.

[0034] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DCI may include operations, features, units, or instructions for performing the following operations: transmitting the DCI that indicates the TDM resource allocation set may be a set of time slots or a set of symbol periods.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the DCI may include operations, features, units, or instructions for performing the following operations: transmitting the DCI that indicates the resource allocation set may be an FDM resource allocation set.

[0036] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: transmitting control signaling that indicates a control channel TCI state of a first transmission beam having a first beam width that can be used to transmit the DCI within a control channel, wherein the DCI may be transmitted within the control channel according to the control channel TCI state.

[0037] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first beam width of the control channel transmission beam indicated by the control channel TCI state may be wider than a second beam width of a second transmission beam indicated by a first TCI state among the plurality of transmission configuration indicator states.

[0038] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the control channel TCI state corresponds to a first quasi-co-location relationship with a first reference signal, and the first TCI state among the plurality of transmission configuration indicator states corresponds to a second quasi-co-location relationship with a second reference signal.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first quasi-co-location relationship is different from the second quasi-co-location relationship.

[0040] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the multi-point data transmission may be a broadcast transmission or a multicast transmission.

[0041] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: transmitting control signaling that indicates a first set of active TCI states for multi-point data transmission and a second set of active TCI states for unicast data transmission.

[0042] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: transmitting a second DCI that indicates a second resource allocation for unicast data transmission and an index to a second TCI state in the second set of active TCI states; and transmitting the unicast data transmission via the second resource allocation according to the second TCI state.

[0043] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sending the control signaling may include operations, features, units, or instructions for: sending at least one MAC control element indicating the first active TCI state set, the second active TCI state set, or both. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figures 1-4 FIG. shows an example of a system for wireless communication that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0045] Figures 5A-5C FIG. shows an example of resource allocation for a wireless communication system that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0046] Figure 6 FIG. shows an example of a system for wireless communication that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0047] Figure 7 FIG. shows an example of a system for wireless communication that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0048] Figure 8 FIG. shows an example of a process flow that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0049] Figure 9 AND 10 FIG. shows a diagram of a device that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0050] Figure 11 FIG. shows a diagram of a communication manager that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0051] Figure 12 FIG. shows a diagram of a system that includes a device that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0052] Figure 13 AND 14 FIG. shows a diagram of a device that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0053] Figure 15 FIG. shows a diagram of a communication manager that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure.

[0054] Figure 16A diagram of a system including an apparatus supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure.

[0055] Figures 17 to 20 A flowchart illustrating a method for supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. Detailed Description

[0056] In an LTE (or non-beamforming) wireless communication system, a base station may transmit the same data omnidirectionally to a set of UEs (e.g., all UEs within a cell) simultaneously. In some cases, a single PDCCH transmission may be used to schedule a single Physical Downlink Shared Channel (PDSCH) transmission to the set of UEs. In an NR or other FR2 system, a base station may transmit a transmission in a single direction or several directions at a time using beamforming, and fewer than all UEs served by the base station can receive the transmission simultaneously. When using beamforming to broadcast data, the base station may transmit the same broadcast transmission multiple times to reach all UEs served by the base station (e.g., single or multiple PDCCH transmissions to schedule multiple PDSCH transmissions). Thus, conventional single-cell broadcast methods used in LTE wireless communication systems may not be applicable to NR FR2 systems where analog beamforming is used.

[0057] In accordance with the techniques described herein, for broadcasting or multicasting data transmissions in an NR-FR2 system, a base station may transmit DCI in a single PDCCH to schedule a broadcast or multicast transmission (e.g., PDSCH) to a set of UEs and allocate multiple resource allocations. The DCI may indicate which one of multiple beams (e.g., TCI states) the base station may use to transmit the broadcast or multicast transmission in a corresponding one of the resource allocations. A UE may monitor one or more of the resource allocations to receive a PDSCH on one or more beams associated with the one or more resource allocations.

[0058] Certain aspects of the subject matter described herein may be implemented to realize one or more advantages. The described techniques may support improvements in TCI operation for multi-point transmission, such as increased flexibility and other advantages. Thus, the supported techniques may include improved network operation and, in some examples, may improve network efficiency and other benefits.

[0059] Aspects of the present disclosure are first described in the context of a wireless communication system. Then, aspects are described with respect to example resource allocations and processing flows of the wireless communication system. Aspects of the present disclosure are further illustrated by apparatus diagrams, system diagrams, and flowcharts related to TCI state operation for multi-point transmission, and aspects of the present disclosure are described with reference to these diagrams.

[0060] Figure 1 FIG. 2 shows an example of a wireless communication system 100 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be an LTE network, an LTE-A network, an LTE-A Pro network, or an NR network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, or communication with low-cost and low-complexity devices, or any combination thereof.

[0061] The base stations 105 may be spread throughout a geographic area to form the wireless communication system 100, and may be devices of different forms or having different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110, and the UEs 115 and the base stations 105 may establish one or more communication links 125 over the coverage area 110. The coverage area 110 may be an example of such a geographic area over which the base stations 105 and the UEs 115 may support transmission of signals according to one or more radio access technologies.

[0062] The UEs 115 may be spread throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices of different forms or having different capabilities. In Figure 1 FIG. 10 shows some example UEs 115. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), as Figure 1 shown.

[0063] The base stations 105 may communicate with the core network 130, or with each other, or both. For example, the base stations 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130) over the backhaul links 120 (e.g., via X2, Xn, or other interfaces), or both. In some examples, the backhaul links 120 may be or include one or more wireless links.

[0064] One or more of the base stations 105 described herein may include or may be referred to by those of ordinary skill in the art as a base station transceiver, radio base station, access point, radio transceiver, Node B, evolved Node B (eNB), next generation Node B or Gigabit Node B (either may be referred to as a gNB), home Node B, home evolved Node B, or some other suitable term.

[0065] The UE 115 may include or may be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where the "device" may also be referred to as a unit, station, terminal or client and other examples. The UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer or personal computer. In some examples, the UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device and other examples, which may be implemented in various articles such as appliances, or vehicles, meters and other examples.

[0066] The UE 115 described herein is capable of communicating with various types of devices, such as other UE 115s that can sometimes act as repeaters and base stations 105 and network devices, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations and other examples, as Figure 1 shown.

[0067] The UE 115 and the base station 105 may wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP), which operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating the operation of the carrier, user data or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, the UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers.

[0068] The signal waveform transmitted on a carrier can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or DFT-S-OFDM). In a system employing MCM techniques, a resource element can consist of a symbol period (e.g., the duration of a modulated symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate can be for UE 115. Wireless communication resources can refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further increase the data rate or data integrity for communication with UE 115.

[0069] The time intervals for base station 105 or UE 115 can be represented in multiples of a basic time unit, which can be, for example, a sampling period of T s = 1 / (Δf max ·N f ) seconds, where Δf max can represent the maximum supported subcarrier spacing, and N f can represent the maximum supported discrete Fourier transform (DFT) size). The time intervals of communication resources can be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0070] Each frame can include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot can have the same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into a number of time slots. Alternatively, each frame can include a variable number of time slots, and the number of time slots can depend on the subcarrier spacing. Each time slot can include a number of symbol periods (e.g., depending on the length of the cyclic prefix added in front of each symbol period). In some wireless communication systems 100, a time slot can be further divided into a plurality of mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period can contain one or more (e.g., Nf) sampling periods. The duration of a symbol period can depend on the subcarrier spacing or the operating frequency band.

[0071] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit (e.g., in the time domain) of a wireless communication system 100 and can be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in the form of a burst of shortened TTIs (sTTIs)).

[0072] Physical channels can be multiplexed on a carrier according to various techniques. For example, one or more of TDM techniques, FDM techniques, or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. A control region for a physical control channel (e.g., a control resource set (CORESET)) can be defined by the number of symbol periods and can extend across the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) can be configured for a group of UEs 115. For example, one or more of the UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates at one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format having a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0073] In some examples, the base station 105 can be movable and, thus, provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 use the same or different radio access technologies to provide coverage for respective geographic coverage areas 110.

[0074] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliability, low latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably herein.

[0075] In some examples, the UE 115 is capable of communicating directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication can be within the geographic coverage area 110 of the base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of the base station 105 or otherwise unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the base station 105.

[0076] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an Evolved Packet Core (EPC) or a 5G Core (5GC), which can include at least one control plane entity that manages access and mobility (e.g., a Mobility Management Entity (MME), an Access and Mobility Management Function (AMF)) and at least one user plane entity that routes packets to or interconnects with an external network (e.g., a Serving Gateway (S-GW), a Packet Data Network (PDN) Gateway (P-GW), or a User Plane Function (UPF)). The control plane entity can manage Non-Access Stratum (NAS) functions such as mobility, authentication, and bearer management for a UE 115 served by a base station 105 associated with the core network 130. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can be connected to a network operator IP service 150. The operator IP service 150 can include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or a packet-switched streaming service.

[0077] Some of the network devices in the wireless communication system 100 (e.g., the base station 105) can include subcomponents such as an access network entity 140, which can be an example of an Access Node Controller (ANC). Each access network entity 140 can communicate with a UE 115 through one or more other access network transmission entities 145 (which can be referred to as a radio head, a smart radio head, or a Transmission / Reception Point (TRP)). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or the base station 105 can be distributed across various network devices (e.g., a radio head and an ANC) or consolidated into a single network device (e.g., the base station 105).

[0078] The wireless communication system 100 can operate using one or more frequency bands (generally, in the range of 300 megahertz (MHz) to 300 gigahertz (GHz)). Generally, the region from 300 MHz to 3 GHz is referred to as the Ultra-High Frequency (UHF) region or the decimeter band because the wavelength range is approximately from one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but the waves can be sufficient to penetrate structures to serve a UE 115 located indoors in a macro cell. Compared to transmissions using smaller frequencies and longer waves in the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions can be associated with smaller antennas and shorter distances (e.g., less than 100 kilometers).

[0079] The wireless communication system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ licensed-assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency spectrum band, devices such as the base station 105 and the UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, the operation in the unlicensed frequency band can be based on a carrier aggregation configuration that combines component carriers operating in a licensed frequency band (e.g., LAA). The operation in the unlicensed spectrum can include downlink transmission, uplink transmission, P2P transmission, or D2D transmission, and other examples.

[0080] The base station 105 or the UE 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of the base station 105 or the UE 115 can be located within one or more antenna arrays or antenna panels, which can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays can be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 can be located at different geographical locations. The base station 105 can have an antenna array that has a number of rows and columns of antenna ports that the base station 105 can use to support beamforming for communication with the UE 115. Similarly, the UE 115 can have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel can support radio frequency beamforming for signals transmitted via the antenna ports.

[0081] Beamforming (which can also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., the base station 105, the UE 115) to form or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via the antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals transmitted via the antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each antenna element of the antenna elements can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0082] Base station 105 may use beamforming to send broadcast or unicast transmissions to a set of UEs 115. The base station 105 may send a PDCCH to one or more UEs 115 that may include DCI. The DCI may indicate a set of resource allocations in which the base station 105 may schedule data transmissions and a corresponding TCI state (e.g., indicated as a TCI state index) that the base station 105 may use to send a data transmission in a respective one of the resource allocations. For example, the TCI state may indicate a transmission beam that the base station 105 may use to send a data transmission in a particular resource allocation. The UE 115 may receive the DCI and identify an index in the decoded DCI that may indicate one or more TCI states for sending broadcast or multicast transmissions to the UE 115 in the resource allocation. The UE 115 may select one or more of the resource allocations in the resource allocation for monitoring and then receive data transmissions.

[0083] Figure 2A An example of a wireless communication system 200 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. The wireless communication system 200 may include a base station 105-a and UEs 115-a, 115-b, 115-c, and 115-d, which may be examples of the base station 105 and UE 115 as described with reference to Figure 1 The base station 105-a may serve a geographic coverage area 110-a. In some cases, the base station 105-a may send a broadcast transmission to the UEs 115. For example, the base station 105-a may send control information and data omnidirectionally to the UEs 115 within the geographic coverage area 110-a. Additionally or alternatively, other wireless devices (such as UEs 115-a, 115-b, 115-c, 115-d, or some combination of these UEs 115) may receive control information and data from the base station 105-a via an omnidirectional transmission.

[0084] In some implementations, base station 105-a may operate in an LTE (or non-beamforming) wireless communication system and may transmit broadcast transmissions omnidirectionally to UEs within the cell served by base station 105-a. For example, base station 105-a may transmit control information to UEs 115 (e.g., UEs 115-a, 115-b, 115-c, 115-d) within geographical coverage area 110-a in a single transmission. In another example, base station 105-a may transmit data to UEs 115 (e.g., UEs 115-a, 115-b, 115-c, and 115-d) within geographical coverage area 110-a in a single transmission. In some cases, a single PDCCH transmission may be used to schedule a single PDSCH transmission to a set of UEs 115. For example, base station 105-a may transmit a PDCCH transmission that can be received by UEs 115-a, 115-b, 115-c, and 115-d omnidirectionally. UEs 115 may use the PDCCH to identify scheduling information regarding the PDSCH transmission and may monitor the PDSCH transmission. The base station may transmit a PDSCH transmission that can be received by UEs 115-a, 115-b, 115-c, and 115-d omnidirectionally.

[0085] Methods applicable to conventional single-cell broadcasts may not be applicable to other systems using analog beamforming, such as NR FR2 systems.

[0086] Figure 2B An example of a wireless communication system 201 supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. The wireless communication system 201 may include a base station 105-b and UEs 115-e, 115-f, 115-g, and 115-h, which may be examples of base station 105 and UEs 115 as described with reference to Figure 1 and 2A The base station 105-b may serve a geographical coverage area 110-b. In some cases, the base station 105-b may transmit broadcast transmissions to the UEs 115. For example, the base station 105-b may transmit control information and data to the UEs 115 within the geographical coverage area 110-b using beamforming. Additionally or alternatively, other wireless devices (such as UEs 115-e, 115-f, 115-g, 115-h or some combination of these UEs 115) may receive control information and data from the base station 105-b via beamforming transmissions.

[0087] Due to resource constraints, base station 105-b can use beamforming to transmit a transmission in a single direction or in several directions at a time, and fewer than all UEs 115 served by base station 105 can receive the transmission simultaneously. When broadcasting data, base station 105 can transmit the same broadcast transmission multiple times to reach all UEs 115 served by base station 105 (e.g., a single or multiple PDCCH transmissions to schedule multiple PDSCH transmissions). In some cases, multiple beams (e.g., analog beams) can be transmitted simultaneously. For example, base station 105-b can transmit using beams 215-a, 215-e, and 215-i simultaneously, and one or more of UEs 115-e, 115-f, 115-g, and 115-h can receive the beamformed transmission. In some implementations, UEs 115-h and 115-f can receive the beamformed transmission, and UEs 115-e and 115-g may not receive the beamformed transmission from beams 215-a, 215-e, and 215-i. In some cases, one analog beam can be transmitted at a time. For example, base station 105-b can transmit using beam 215-a, and no UEs 115 can receive the beamformed transmission.

[0088] In some implementations, base station 105 can use beamforming to transmit a single PDCCH transmission or multiple PDCCH transmissions to schedule multiple PDSCH transmissions. The PDCCH can include DCI, which can indicate a set of resource allocations (e.g., a set of time slots, symbol periods, frequency bands, frequency sub-bands) in which base station 105 can schedule data transmissions and the corresponding TCI state that base station 105 will use to transmit the data transmission in a corresponding one of the resource allocations. For example, the TCI state can indicate the transmission beam that base station 105 can use to transmit the data transmission in a particular resource allocation. UE 115 can receive the DCI, and select one or more of the resource allocations in the resource allocation to monitor, and then receive the data transmission. In some cases, UE 115 can select one or more resource allocations based on the beam associated with the resource allocation. For example, beam 215-i can be a preferred beam for UE 115-f, and UE 115-f can select the resource allocation associated with beam 215-i to monitor.

[0089] Figure 3A An example of a wireless communication system 300 that supports TCI state operation for multi-point transmission in accordance with various aspects of the present disclosure is shown. The wireless communication system 300 can include base station 105-c and UEs 115-i, 115-j, 115-k, and 115-l, which can be as described with reference to Figures 1-2BExample of the described base station 105 and UE 115. Base station 105-c may serve a geographic coverage area 110-c. In some cases, base station 105-c may send a broadcast transmission to UE 115. For example, base station 105-c may use beamforming to send control information and data to UE 115 within geographic coverage area 110-c. Additionally or alternatively, other wireless devices (such as UE 115-i, 115-j, 115-k, 115-l or some combination of these UEs 115) may receive control information and data from base station 105-c via beamforming transmissions.

[0090] Base station 105-c may use beamforming to send broadcast, multicast, or unicast transmissions or a combination thereof to a set of UEs 115. In some implementations (e.g., FR2 broadcast), there may be multiple beam types (e.g., narrow beams and wide beams). For example, base station 105-c may use a wide beam (e.g., wide beam 320-a, 320-b, 320-c, 320-d or a combination thereof) to send to one or more UEs 115. Wide beams 320-a, 320-b, 320-c, and 320-b may represent example wide beams that a base station may use to send to UEs 115 within a cell.

[0091] In some implementations, a wide beam may cover a larger area compared to a narrow beam, such that each UE 115 in the serving area can be reached using a small number of wide beams. Compared to using narrow beams, the base station may reduce the amount of time required to send beamforming transmissions to each UE 115 in geographic coverage 110-c by using wide beams. In some cases, wide beams may be used for low data rate broadcast data.

[0092] In some implementations, each wide beam in a set of wide beams may be positioned (e.g., quasi-collocated) with a corresponding SSB in a set of synchronization signal blocks (SSBs). For example, base station 105-c may perform beam scanning such that base station 105-c may periodically send synchronization signals from each wide beam 320 within the corresponding SSB. UE 115 may receive one or more synchronization signals and may measure the signal quality (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR)) of each received synchronization signal in each SSB. UE 115 may determine one or more transmit-receive beam pairs (e.g., preferred beam pairs) based on the signal quality measurements of one or more synchronization signals. UE115 may receive signals on one or more wide receive beams associated with one or more preferred transmit-receive beam pairs.

[0093] The wide beam 320 can be used to transmit control information or data or a combination thereof. In some cases, the base station 105-c can use the wide beam 320 to send PDCCH transmissions to reduce the amount of time required to send control information to the UEs 115 served by the base station 105-c.

[0094] Figure 3B An example of a wireless communication system 301 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. The wireless communication system 301 can include a base station 105-d and UEs 115-m, 115-n, 115-o, and 115-p, which can be examples of the base station 105 and UEs 115 as described with reference to Figures 1-3A The base station 105-d can serve a geographic coverage area 110-d. In some cases, the base station 105-d can send broadcast transmissions to the UEs 115. For example, the base station 105-d can use beamforming to send control information and data to the UEs 115 within the geographic coverage area 110-d. Additionally or alternatively, other wireless devices (such as UEs 115-m, 115-n, 115-o, 115-p or some combination of these UEs 115) can receive control information and data from the base station 105-d via beamforming transmissions.

[0095] In some implementations, the base station 105-d can use narrow beams 315 (e.g., narrow beams 315-a to 315-k) to transmit to the UEs 115-m, 115-n, 115-o, and 115-p. The narrow beams 315-a to 315-k can represent example narrow beams 315 that the base station 105-d can use to transmit to the UEs 115 within the cell. In some implementations, using narrow beams for beamforming transmissions can achieve higher data rates.

[0096] In some cases, each narrow beam in the narrow beam set can be quasi-co-located with a corresponding CSI-RS in a channel state information reference signal (CSI-RS) set. For example, the base station 105-d can perform beam scanning such that the base station 105-d can periodically send reference signals from each narrow beam 315 using the corresponding CSI-RS. The UE 115 can receive one or more reference signals and can measure the signal quality (e.g., RSRP, RSRQ, SINR) of each received reference signal. The UE 115 can determine one or more transmit-receive beam pairs (e.g., preferred beam pairs) based on the signal quality measurements of the one or more reference signals. The UE 115 can receive signals on one or more narrow receive beams associated with the one or more preferred transmit-receive beam pairs.

[0097] The narrow beam 315 may include control information or data or a combination thereof. In some cases, the base station 105-d may use the narrow beam 315 to transmit PDCCH transmissions, PDSCH transmissions, or a combination thereof to increase the data rate of beamforming transmissions.

[0098] Figure 4 An example of a wireless communication system 400 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. The wireless communication system 400 may include a base station 105-e and UEs 115-q, 115-r, 115-s, 115-t, and 115-u, which may be examples of the base station 105 and UEs 115 as described with reference to Figures 1-3B described. The base station 105-e may serve a geographic coverage area 110-e. In some cases, the base station 105-e may send broadcast transmissions to the UEs 115. For example, the base station 105-e may use beamforming to send control information and data to the UEs 115 within the geographic coverage area 110-e. Additionally or alternatively, other wireless devices (such as UEs 115-q, 115-r, 115-s, 115-t, 115-u or some combination of these UEs 115) may receive control information and data from the base station 105-e via beamforming transmissions.

[0099] The base station 105-e may send beamforming transmissions to the UEs 115-q, 115-r, 115-s, 115-t, 115-u. The beamforming transmissions may include control information (e.g., PDCCH), data (e.g., PDSCH), or a combination thereof. In some implementations, narrow beams, wide beams, or a combination thereof may be used to send the beamforming transmissions. In some cases, the same or similar beam widths may be used to send both PDSCH transmissions and PDSCH transmissions. For example, narrow beams (e.g., beams 415-a, 415-b, 415-c) may be used to send PDCCH transmissions, and narrow beams (e.g., beams 415-a, 415-b, 415-c) may be used to send PDSCH transmissions. As Figure 3B described, each beam may be quasi-co-located with CSI-RS.

[0100] In some cases, the base station 105-e may send one or more PDCCH transmissions on one or more beams 415. The PDCCH may include DCI, which may indicate a set of resource allocations for one or more PDSCH transmissions. The DCI may indicate which one of a plurality of beams (e.g., TCI state) is being used to send a broadcast or multicast transmission in a corresponding one of the resource allocations in the resource allocation.

[0101] Resource allocation may depend on the identifier of the UE or UE group or a combination thereof. For example, UEs 115-q and 115-r may be assigned an identifier associated with group 1 (e.g., G-RNTI), UEs 115-t and 115-u may be assigned an identifier associated with group 2 (e.g., G-RNTI), and UE 115-s may be assigned a group identifier associated with group 3 (e.g., G-RNTI). Each UE 115 may also be assigned a separate identifier unique to the UE 115 (e.g., C-RNTI). The identifier assigned to the UE115 or UE 115 group may be used to scramble and descramble the DCI and identify the information associated with the UE 115 or UE 115 group.

[0102] In some cases, the UEs 115 of a group may receive a PDCCH from the base station 105-e in the resource allocation 420 and may identify, when descrambling the DCI, the TCI state associated with group 1 in the DCI (when the group identifier of group 1 is used to successfully decode the DCI). For example, the UEs 115 of group 1 may receive a PDCCH that may include a DCI in the resource allocation 420-a. The DCI may include a TCI state that may indicate that the UEs 115 of group 1 should monitor the PDSCH transmission in the resource allocation 425-a on the same beam (e.g., beam 415-a) used to receive the PDCCH in the resource allocation 420-a. In another example, the UEs 115 of group 2 may receive a DCI in the resource allocation 420-b, and the DCI may include a TCI state that indicates that the same beam used by the UEs 115 to receive the PDCCH in the resource allocation 420-b should be used to receive the PDSCH in the resource allocation 425-b (e.g., beam 415-b). In another example, the UEs 115 of group 3 may receive a DCI in the resource allocation 420-c, and the DCI may include a TCI state that indicates that the same beam used by the UEs 115 to receive the PDCCH in the resource allocation 420-c should be used to receive the PDSCH transmission in the resource allocation 425-c (e.g., beam 415-b). In some cases, the PDCCH transmission and the PDSCH transmission may be associated with an individual UE 115 rather than a group of UEs 115.

[0103] Figure 5A , 5B and 5C illustrate examples of resource allocations of wireless communication systems 500, 501, and 502 that support TCI state operations for multi-point transmission according to aspects of the present disclosure. The wireless communication systems 500, 501, and 502 may include a base station 105-f and UEs 115-v, 115-w, 115-x, 115-y, and 115-z, which may be as described with reference toFigures 1-4 An example of the described base station 105 and UE 115. The base station 105-f may serve a geographical coverage area 110-f. In some cases, the base station 105-f may send a broadcast transmission to the UE 115. For example, the base station 105-f may use beamforming to send control information and data to the UE 115 within the geographical coverage area 110-f. Additionally or alternatively, other wireless devices (such as UE 115-v, 115-w, 115-x, 115-y, 115-z or some combination of these UEs 115) may receive control information and data from the base station 105-f via beamforming transmissions.

[0104] In an NR or other FR2 system, the base station 105 may use beamforming to send a transmission in a single direction or several directions at a time. When using beamforming to broadcast data, the base station 105 may not have enough hardware to transmit on all available beams in the beamforming codebook, and the base station 105 may have to transmit the same broadcast transmission multiple times to reach all UEs 115 served by the base station 105. For example, the base station 105 may use multiple beams pointing in different directions to send one or more PDCCH transmissions to reach all served UEs 115, and schedule multiple PDSCH transmissions with the UEs 115. Each PDCCH transmission may include DCI, which may indicate a set of resource allocations for the multiple PDSCH transmissions and the corresponding TCI state for each resource allocation. In some implementations, a wide beam may be used to send the PDCCH transmission, and one or more narrow beams may be used to send one or more PDSCH transmissions. The wide beam may be quasi-co-located with the corresponding SSB, and the narrow beam may be quasi-co-located with the corresponding CSI-RS.

[0105] The DCI may indicate which one of the multiple beams (e.g., via the TCI state) is being used to send a broadcast or multicast transmission in a corresponding one of the resource allocations. The TCI state may be used in cases where the base station 105 may communicate with the UE 115 using multiple antennas. Data streams may be mapped to antennas using antenna ports. In some cases, the base station may send an indication to the UE of the quasi-co-location relationship between the antenna ports used for downlink communication with the UE. Such an indication may be referred to as TCI. Different TCI states may correspond to different quasi-co-location relationships between the antenna ports used for downlink communication with the UE. For example, the TCI state may indicate the quasi-co-location relationship between a reference signal resource (e.g., Tracking Reference Signal (TRS), SSB, CSI-RS) and a UE target reference signal (e.g., Demodulation Reference Signal (DM-RS)).

[0106] In some cases, the resource allocation indicated in the DCI can be TDM across time slots, TDM within a time slot, or FDM within a time slot, or a combination thereof. For example, base station 105 can indicate in the DCI which resource allocation the base station 105 can use to transmit a PDSCH transmission and can include one or more TCI states that assign TCI states to indicate the specific transmission beam that can be used to transmit the PDSCH transmission within a specific resource allocation. UE 115 can receive the DCI, identify the corresponding TCI state assigned to each resource allocation as indicated in the DCI, and identify the receive beam for receiving the PDSCH transmission for the specific resource allocation corresponding to the transmission beam indicated in the TCI state. UE 115 can monitor one or more of the resource allocations to receive the PDSCH transmission using the receive beam corresponding to the TCI state of the one or more monitored resource allocations.

[0107] For example, base station 105-f can transmit a broadcast, multicast, or unicast transmission on one or more of its narrow beams (e.g., beams 515-a, 515-b, 515-c, 515-d, 515-e, 515-f, 515-g, 515-h) and one or more of its wide beams (e.g., beams 520-a, 520-b). The narrow beams can be used to transmit PDSCH transmissions, and the wide beams can be used to transmit PDCCH transmissions. For example, base station 105-f can transmit a PDCCH on wide beam 520-a in time slot 525-a.

[0108] In some cases, UEs 115-v and 115-w can be associated with group 1, and UEs 115-x, 115-y, and 115-z can be associated with group 2. Each group can be assigned a unique identifier (e.g., G-RNTI). The UEs of group 1 can receive PDCCH transmissions in slot 525-a transmitted on wide beam 520-a. Based on the received PDCCH transmissions, the UEs 115 of group 1 can identify the resource allocation type applied to the PDSCH and identify the corresponding TCI state assigned to each resource allocation as indicated in the DCI. For example, the DCI of the PDCCH can indicate that the resource allocation type is TDM across slots. The DCI can also indicate one or more TCI states. For example, one TCI state can indicate that the PDSCH can be transmitted on beam 515-a in slot 530-a. Other TCI states can indicate that the PDSCH can be transmitted on beam 515-b in slot 530-b, on beam 515-c in slot 530-c, or on beam 515-d in slot 530-d. The UEs 115 of group 1 can identify the receive beam for receiving the PDSCH transmission for a specific resource allocation corresponding to the transmission beam indicated in the TCI state. For example, UE 115-v can identify beam 515-b as the preferred beam and can monitor the PDSCH on beam 515-b in 530-b.

[0109] In another example, the UEs of group 2 can receive PDCCH transmissions in slot 525-b transmitted on wide beam 520-b. Based on the received PDCCH transmissions, the UEs 115 of group 2 can identify the resource allocation type applied to the PDSCH and identify the corresponding TCI state assigned to each resource allocation as indicated in the DCI. For example, the DCI can indicate that the resource allocation type is TDM across slots and can indicate one or more TCI states. For example, one TCI state can indicate that the PDSCH can be transmitted on beam 515-e in slot 535-a. Other TCI states can indicate that the PDSCH can be transmitted on beam 515-f in slot 535-b, on beam 515-g in slot 535-c, and on beam 515-h in slot 535-d. The UEs 115 of group 2 can identify the receive beam for receiving the PDSCH transmission for a specific resource allocation corresponding to the transmission beam indicated in the TCI state. For example, UE 115-z can identify beam 515-h as the preferred beam and can monitor the PDSCH on beam 515-h in 535-d.

[0110] Figure 5B Resource allocations for wireless communication system 501 are shown. As Figure 5A described, resource allocations can be indicated in the DCI. For example,Figure 5B The resource allocation indicated in Figure 5B may be TDM within a time slot.

[0111] For example, as Figure 5A shown, UEs 115-v and 115-w may be associated with group 1, and UEs 115-x, 115-y, and 115-z may be associated with group 2. Each group may be assigned a unique identifier (e.g., G-RNTI). The UEs of group 1 may receive PDCCH transmissions in symbol 540-a transmitted on wide beam 520-a. Based on the received PDCCH transmissions, the UEs 115 of group 1 may identify the type of resource allocation applied to the PDSCH and identify the corresponding TCI state assigned to each resource allocation as indicated in the DCI. For example, the DCI of the PDCCH may indicate that the resource allocation type is TDM within a time slot. The DCI may also indicate one or more TCI states. For example, one TCI state may indicate that the PDSCH may be transmitted on beam 515-a in symbol 545-a (or mini-slot). Other TCI states may indicate that the PDSCH may be transmitted on beam 515-b in symbol 545-b, on beam 515-c in symbol 545-c, and on beam 515-d in symbol 545-d. The UEs 115 of group 1 may identify the receive beam for receiving the PDSCH transmission for a particular resource allocation corresponding to the transmission beam indicated in the TCI state. For example, UE 115-v may identify beam 515-b as the preferred beam and may monitor the PDSCH on beam 515-b in symbol 555-b.

[0112] Figure 5C FIG. shows a resource allocation for a wireless communication system 502. As Figure 5A described, the resource allocation may be indicated in the DCI. For example, Figure 5C the resource allocation indicated in Figure 5C may be FDM within a time slot.

[0113] For example, as Figure 5AAs shown, UEs 115-v and 115-w can be associated with Group 1, and UEs 115-x, 115-y, and 115-z can be associated with Group 2. Each group can be assigned a unique identifier (e.g., G-RNTI). The UEs in Group 1 can receive PDCCH transmissions in symbol 540-a transmitted on wide beam 520-a. Based on the received PDCCH transmissions, the UEs 115 in Group 1 can identify the resource allocation type applied to the PDSCH and identify the corresponding TCI state assigned to each resource allocation as indicated in the DCI. For example, the DCI of the PDCCH can indicate that the resource allocation type is FDM within a time slot. The DCI can also indicate one or more TCI states. For example, one TCI state can indicate that the PDSCH can be transmitted on beam 515-a in frequency band 560-a (e.g., one or more subcarriers, resource blocks, BWPs). Other TCI states can indicate that the PDSCH can be transmitted on beam 515-b in frequency band 560-b, on beam 515-c in frequency band 560-c, and on beam 515-d in frequency band 560-d. The UEs 115 in Group 1 can identify the receive beam for receiving the PDSCH transmission for a particular resource allocation corresponding to the transmission beam indicated in the TCI state. For example, UE 115-v can identify beam 515-b as the preferred beam and can monitor the PDSCH on beam 515-b in frequency band 560-b.

[0114] Figure 6 FIG. shows an example of a wireless communication system 600 supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. The wireless communication system 600 can include base station 105-g and UEs 115-aa and 115-bb, which can be examples of base station 105 and UE 115 as described with reference to Figures 1-5C In some cases, base station 105-g can send broadcast transmissions to UEs 115. For example, base station 105-g can use beamforming to send control information and data transmissions to UEs 115 within geographic coverage area 110-g. Additionally or alternatively, other wireless devices (such as UEs 115-aa, 115-bb, or some combination of these UEs 115) can receive control information and data from base station 105-g via beamforming transmissions.

[0115] The base station 105 may configure the UE 115 with multiple TCI state sets. The first TCI state set may indicate an active TCI state for multicast or broadcast transmission from the base station to a group of UEs. The second TCI state set may indicate an active TCI state for unicast transmission from the base station 105 to a specific UE 115. The base station 105 may indicate to the UE 115 which TCI state set to use based on how the DCI is scrambled. For example, depending on unicast or multicast PDSCH transmission, the base station 105 may scramble the DCI in different ways. If the base station 105 is scheduling a unicast PDSCH transmission, the base station 105 may scramble the DCI using the C-RNTI of the individual UE 115. In some examples, if the base station 105 is scheduling a multicast or broadcast PDSCH transmission to a group of UEs 115, the base station 105 may scramble the DCI using the G-RNTI of the group of UEs 105.

[0116] UE 115 (e.g., UE 115-aa, UE 115-bb) can monitor a control channel (e.g., PDCCH) and process a signal received within the control channel to determine a received bit sequence. UE 115 (e.g., UE 115-aa, UE 115-bb) can use a group identifier (e.g., G-RNTI) of a group that includes UE 115 (e.g., UE 115-aa, UE 115-bb) to descramble the received bit sequence, and process the descrambled bit sequence to determine whether the descrambled bit sequence includes DCI addressed to the group (e.g., group 1). For example, if an error (e.g., CRC error) is detected in the descrambled bit sequence, or the descrambled CRC bits of the DCI, or both, then UE 115 (e.g., UE 115-aa, UE 115-bb) discards the descrambled bit sequence and determines that the descrambled bit sequence does not include DCI addressed to the group (e.g., group 1). For example, if no error (e.g., CRC error) is detected in the descrambled bit sequence, or the descrambled CRC bits of the DCI, or both, then UE 115 (e.g., UE 115-aa, UE 115-bb) determines that the descrambled bit sequence includes DCI addressed to the group (e.g., group 1). Then, UE 115 (e.g., UE 115-aa, UE 115-bb) can determine that UE115 will use a broadcast / multicast active TCI state set (instead of a unicast active TCI state set) based on successfully decoding DCI addressed to the UE 115 group that includes UE 115 (e.g., UE 115-aa, UE 115-bb). The DCI can provide an index (e.g., TCI code point) that can indicate a specific active TCI state from a broadcast or multicast TCI state set, and the specific active TCI state can be used to send a broadcast or multicast transmission to a UE group (e.g., group 1) within a resource allocation also indicated in the DCI. UE 115 (e.g., UE 115-aa, UE 115-bb) can use a receive beam corresponding to the specific active TCI state to monitor the resource allocation to receive a broadcast / multicast transmission. Table 1 can be an example of a TCI state set for a multicast / broadcast transmission of a UE 115 group (e.g., group 1), the UE 115 can be configured with the TCI state set, and in some examples, different TCI state sets can be configured for each UE group in a set of UE groups. For example, the DCI can include TCI code points 0 to 7, where each code point can indicate a TCI state from the TCI state set for group 1, as depicted in Table 1 below

[0117] and other TCI state sets can be configured for other UE groups similarly.

[0118]

[0119] Table 1

[0120] For example, UEs 115-aa and 115-bb may be assigned to group 1, which may be associated with a group identifier (e.g., G-RNTI), and UEs 115-aa and 115-bb may receive a PDCCH in resource allocation 625. UEs 115-aa and 115-bb may use the group identifier of group 1 (e.g., G-RNTI) to descramble the received bit sequence and process the descrambled bit sequence to determine whether the descrambled bit sequence includes DCI addressed to group 1. In some cases, the descrambled bit sequence may pass error detection, and UEs 115-aa and 115-bb may determine that the descrambled bit sequence includes DCI addressed to group 1. UEs 115-aa and 115-bb may determine that each UE 115 should use a broadcast / multicast active TCI state set (e.g., instead of a unicast active TCI state set) based on successfully decoding the DCI addressed to group 1. The DCI may provide an index (e.g., a TCI code point) that may indicate a specific active TCI state from the broadcast / multicast TCI state set that is being used for a broadcast / multicast transmission to the UEs 115 within group 1 in the resource allocation also indicated in the DCI. For example, the TCI state may indicate that beam 615-a is associated with resource allocation 630-a, beam 615-b is associated with resource allocation 630-b, beam 615-c is associated with resource allocation 630-c, and beam 615-d is associated with resource allocation 630-d. UEs 115-aa and 115-bb may use the receive beam corresponding to the specific active TCI state to monitor the resource allocations (e.g., resource allocations 630-a, 630-b, 630-c, and 630-d) to receive the broadcast / multicast transmission. UE 115 may monitor more than one resource allocation or may monitor one resource allocation based on the preferred beam of UE 115. For example, beam 615-d may be the preferred beam of UE 115-bb, so UE 115-bb may monitor resource allocation 630-d.

[0121] In some cases, the descrambled bit sequence may fail error detection, and UEs 115-aa and 115-bb may discard the descrambled bit sequence and determine that the descrambled bit sequence does not include DCI addressed to group 1. In some cases, UEs 115-aa and 115-bb may attempt to descramble the bit sequence using a separate identifier (e.g., C-RNTI).

[0122] Figure 7 FIG. 700 illustrates an example of a wireless communication system supporting TCI state operation for multicast transmissions in accordance with aspects of the present disclosure. The wireless communication system 700 can include a base station 105-h and UEs 115-cc and 115-dd, which can be examples of base station 105 and UE 115 as described with reference to Figures 1-6 FIG. The base station 105-h can serve a geographic coverage area 110-h. In some cases, the base station 105-h can send unicast transmissions to the UE 115. For example, the base station 105-h can use beamforming to send control information and data to the UE within the geographic coverage area 110-h. Additionally or alternatively, other wireless devices (such as UEs 115-cc, 115-dd, or some combination of these UEs 115) can receive control information and data from the base station 105-h via beamforming transmissions.

[0123] The base station 105 can configure the UE 115 with multiple active TCI state sets. Depending on the identifier of the received PDCCH (e.g., C-RNTI, G-RNTI), different TCI indexes (e.g., quasi-co-location mapping) can be used. In some cases, two different CSI-RS resource sets can be configured for broadcast / multicast and unicast transmissions. For example, the first active TCI state set can indicate the active TCI state for multicast or broadcast transmissions from the base station to a group of UEs. The second active TCI state set can indicate the active TCI state for unicast transmissions from the base station 105 to a specific UE 115. The base station 105 can indicate to the UE 115 which active TCI state set to use based on how the DCI is scrambled. For example, depending on the unicast or multicast PDSCH transmission, the base station 105 can scramble the DCI in a different manner. If the base station 105 is scheduling a unicast PDSCH transmission, the base station 105 can scramble the DCI using the C-RNTI of the individual UE 115. In some examples, if the base station 105 is scheduling a multicast or broadcast PDSCH transmission to a group of UEs 115, the base station 105 can scramble the DCI using the G-RNTI of the group of UEs 105. In certain cases, a separate MAC control element can be used to update the activated TCI state.

[0124] The UE 115 (e.g., UE 115-cc, UE 115-dd) may monitor a control channel (e.g., PDCCH) and process the signals received within the control channel to determine the received bit sequence. The UE 115 (e.g., UE 115-cc, UE 115-dd) may use a separate identifier of the UE 115 (e.g., C-RNTI) to descramble the received bit sequence and process the descrambled bit sequence to determine whether the descrambled bit sequence includes DCI addressed to the UE 115 (e.g., UE 115-cc, UE 115-dd). For example, if the descrambled bit sequence fails error detection, the UE 115 (e.g., UE 115-cc, UE 115-dd) may discard the descrambled bit sequence and determine that the descrambled bit sequence does not include DCI for the UE 115 (e.g., UE 115-cc, UE 115-dd). For example, if the descrambled bit sequence passes error detection, the UE 115 (e.g., UE 115-cc, UE 115-dd) may determine that the descrambled bit sequence may include DCI addressed to the UE 115 (e.g., UE 115-cc, UE 115-dd). Then, the UE 115 (e.g., UE 115-cc, UE 115-dd) may determine that the UE 115 will use a unicast active TCI state set (instead of a broadcast / multicast active TCI state set) based on successfully decoding the DCI addressed to the UE 115 (e.g., UE 115-cc, UE 115-dd). The DCI may provide an index (e.g., TCI code point) that may indicate a specific active TCI state from the unicast active TCI state set, and the specific active TCI state may be used to send a unicast transmission to the UE 115 within the resource allocation also indicated in the DCI. The UE 115 may use the receive beam corresponding to the specific active TCI state to monitor the resource allocation to receive the unicast transmission. Table 2 may be an example of a set of TCI states that the UE 115 may be configured with for unicast transmission. For example, the DCI may include TCI code points 0 to 7, where each code point may indicate a TCI state.

[0125]

[0126] Table 2

[0127] For example, UE 115-cc may monitor a control channel (e.g., PDCCH in the resource allocation in 725-a), and process the signals received within the control channel to determine the received bit sequence. UE 115-cc may use a separate identifier of UE 115-cc (e.g., C-RNTI) to descramble the received bit sequence, and process the descrambled bit sequence to determine whether the descrambled bit sequence includes DCI addressed to UE 115-cc. In some cases, the descrambled bit sequence may pass error detection, and UE 115-cc may determine that the descrambled bit sequence includes DCI addressed to UE 115-cc. UE 115-cc may determine that UE 115-cc will use a unicast active TCI state set (instead of a broadcast / multicast active TCI state set) based on successfully decoding the DCI addressed to UE 115-cc.

[0128] The DCI may provide an index (e.g., a TCI code point) that may indicate a specific active TCI state from the unicast active TCI state set, and the specific active TCI state may be used to send a unicast transmission to UE 115-cc in the resource allocation also indicated in the DCI. For example, the TCI state may indicate that 715-a is associated with resource allocation 730-a and beam 715-b is associated with resource allocation 730-b. In some cases, resource allocations 730-a and 730-b may be the same. UE 115-cc may use the receive beam corresponding to the specific active TCI state to monitor the resource allocation to receive the unicast transmission. For example, UE 115-cc may simultaneously monitor beams 715-a and 715-b in resource allocations 730-a and 730-b, or UE 115-cc may identify a preferred beam based on signal measurements and may monitor the resource allocation associated with that beam 715. For example, beam 715-b may be the preferred beam of UE 115-cc, so UE 115-cc may monitor resource allocation 730-b for beam 715-b.

[0129] Figure 8 An example of a process flow 800 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. Process flow 800 may show an example TCI operation for single-cell broadcast in FR2. For example, base station 105-i may perform TCI operations to send signals to UE 115-ee. Base station 105-i and UE 115-ee may be referred to Figures 1 to 7Example of a corresponding wireless device described. In some cases, different types of wireless devices (e.g., UE 115) may perform TCI operations instead of the base station 105-i performing TCI operations. The following alternative examples may be implemented, where some steps are performed in a different order than described or not at all. In some cases, the steps may include additional features not mentioned below, or additional steps may be added.

[0130] At 805, the base station 105-i may send a Radio Resource Control (RRC) message to the UE 115-ee. The RRC may configure candidate TCI states. For example, up to M candidate TCI states (e.g., M may be equal to 64 or 128) may be configured via the RRC.

[0131] At 810, the base station 105-i may send a MAC control element to the UE 115-ee. The MAC control element may activate the TCI state. For example, up to L = 2N TCI states (e.g., if N = 3, then L may be equal to 8) from the M candidate TCI states of 805 may be activated via the MAC control element. In some cases, the UE 115-ee may receive at least one MAC control element that indicates a first set of active TCI states, a second set of active TCI states, or both.

[0132] At 815, the base station 105-i may send DCI to the UE 115-ee. The DCI may indicate one or more TCI states. For example, one TCI state out of the L TCI states (e.g., using an N(=3)-bit TCI parameter) may be indicated via the DCI. In some implementations, the DCI may be included in a PDCCH transmission. In some cases, the UE 115-ee may receive DCI that indicates a set of resource allocations, within each of which multi-point data transmission may be scheduled for transmission. The DCI may indicate the corresponding TCI state assigned to each resource allocation in the set of resource allocations from the set of TCI states. In some cases, the DCI may be scrambled using a group identifier (e.g., G-RNTI) or a separate UE 115 identifier (e.g., C-RNTI). In some implementations, the DCI may indicate that the set of resource allocations is a TDM resource allocation set, which may be a set of time slots or a set of symbol periods as described in Figure 5A and 5B described. In some implementations, the DCI may indicate that the set of resource allocations is an FDM resource allocation set as described in Figure 5C described.

[0133] Upon receiving the DCI, UE 115-ee may decode the DCI, which is descrambled from the received bit sequence based on a group identifier assigned to a group including UE 115-ee. In some cases, UE 115-ee may receive a second DCI and may decode the second DCI, which is descrambled from the received bit sequence based on the UE identifier of UE 115-ee, and the second DCI may indicate a second resource allocation for unicast data transmission.

[0134] Based on decoding the DCI, UE 115-e may select a first TCI state from a first set of active TCI states by indexing the first set of active TCI states based on an index derived from the DCI. Based on decoding the second DCI, UE 115-ee may select a second TCI state from a second set of active TCI states by indexing the second set of active TCI states based on an index derived from the second DCI.

[0135] At 820, UE 115-ee may monitor PDSCH transmissions from base station 105-i. In some cases, UE 115-ee may monitor a first resource allocation for multi-point data transmission (e.g., PDSCH) using a receive beam corresponding to a first TCI state in a set of TCI states assigned to the first resource allocation in a resource allocation set. In some implementations, UE 115-e may monitor broadcast, multicast, or unicast data transmission.

[0136] At 825, base station 105-i may send a PDSCH transmission to UE 115-ee. In some cases, base station 105-i may send multi-point data transmission (e.g., PDSCH) in each resource allocation in a resource allocation set according to corresponding TCI states respectively assigned to the resource allocation set in the set of TCI states. In some cases, the multi-point data transmission may be broadcast, multicast, or unicast data transmission.

[0137] At 830, UE 115-ee may optionally send an acknowledgement (ACK) to base station 105-e. The ACK may indicate that UE 115-ee has successfully received the PDSCH. In some cases, as Figure 7 described, UE 115-ee may send an ACK when successfully decoding a unicast PDSCH transmission.

[0138] Figure 9FIG. 900 shows an apparatus 905 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. The apparatus 905 may be an example of aspects of a UE 115 as described herein. The apparatus 905 may include a receiver 910, a communication manager 915, and a transmitter 920. The apparatus 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0139] The receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to TCI state operation for multi-point transmission, etc.). The information may be passed to other components of the apparatus 905. The receiver 910 may be an example of aspects of the transceiver 1220 described in Figure 12 reference. The receiver 910 may utilize a single antenna or an antenna array.

[0140] The communication manager 915 may perform operations including: receiving DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, where multi-point data transmission is scheduled for transmission within each resource allocation in the set of resource allocations; and monitoring a first resource allocation for multi-point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states. The communication manager 915 may be an example of aspects of the communication manager 1210 described herein.

[0141] The communication manager 915 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 915 or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0142] The communication manager 915 or its sub-components may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to aspects of the present disclosure, the communication manager 915 or its sub-components may be separate and distinct components. In some examples, according to aspects of the present disclosure, the communication manager 915 or its sub-components may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof.

[0143] The transmitter 920 may transmit signals generated by other components of the device 905. In some examples, the transmitter 920 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 920 may be an example of aspects of the transceiver 1220 described with reference to Figure 12 The transmitter 920 may utilize a single antenna or an antenna array.

[0144] The communication manager 915 as described herein may be implemented to achieve one or more potential advantages. One implementation may allow the device 905 to more flexibly coordinate the resource allocation for data transmission between the base station and the device 905, and more specifically, allow the device 905 to use the TCI state index indicated in the DCI to coordinate the resource allocation for data transmission. For example, the device 905 may identify the resource allocation for monitoring downlink data transmission based on the received DCI indicating the resource allocation and the TCI state index.

[0145] Based on implementing the resource allocation and TCI state techniques described herein, the processor of the UE 115 (e.g., controlling the receiver 910, the transmitter 920, or the transceiver 1220 as described with reference to Figure 12 The communication in terms of resource allocation and TCI state may increase flexibility and reliability and reduce signaling overhead because multiple resource allocations for data transmission may be indicated using one control channel transmission.

[0146] Figure 10 FIG. 1000 shows a device 1005 that supports TCI state operations for multi-point transmission according to aspects of the present disclosure. The device 1005 may be an example of aspects of the device 905 or the UE 115 described herein. The device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1030. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0147] The receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to TCI state operation for multicast transmission, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be an example of aspects of the transceiver 1220 described with reference to Figure 12 The receiver 1010 may utilize a single antenna or an antenna array.

[0148] The communication manager 1015 may be an example of aspects of the communication manager 915 described herein. The communication manager 1015 may include a control information receiver 1020 and a resource allocation manager 1025. The communication manager 1015 may be an example of aspects of the communication manager 1210 described herein.

[0149] The control information receiver 1020 may receive DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, and within each resource allocation in the set of resource allocations, multicast data transmission is scheduled for transmission.

[0150] The resource allocation manager 1025 may monitor the first resource allocation for multicast data transmission using a receive beam corresponding to the first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0151] The transmitter 1030 may send signals generated by other components of the device 1005. In some examples, the transmitter 1030 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1030 may be an example of aspects of the transceiver 1220 described with reference to Figure 12 The transmitter 1030 may utilize a single antenna or an antenna array.

[0152] Figure 11 FIG. 1100 shows a communication manager 1105 that supports TCI state operation for multicast transmission according to aspects of the present disclosure. The communication manager 1105 may be an example of aspects of the communication manager 915, the communication manager 1015, or the communication manager 1210 described herein. The communication manager 1105 may include a control information receiver 1110, a resource allocation manager 1115, a control signaling receiver 1120, a control signaling receiver 1125, a data receiver 1130, a control information decoder 1135, and a TCI manager 1140. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0153] The control information receiver 1110 may receive DCI that indicates a set of resource allocations and corresponding TCI states assigned from a set of TCI states to each resource allocation in the set of resource allocations, and within each resource allocation in the set of resource allocations, multi-point data transmission is scheduled for transmission.

[0154] In some examples, the control information receiver 1110 may receive DCI scrambled with a group identifier of a group including the UE. In some examples, the control information receiver 1110 may receive DCI indicating that the set of resource allocations may be a TDM resource allocation set. In some examples, the control information receiver 1110 may receive DCI indicating that the TDM resource allocation set is a set of time slots or a set of symbol periods. In some examples, the control information receiver 1110 may receive DCI indicating that the set of resource allocations is an FDM resource allocation set.

[0155] The resource allocation manager 1115 may monitor the first resource allocation for multi-point data transmission using a receiving beam corresponding to the first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states. In some examples, the resource allocation manager 1115 may monitor the second resource allocation for unicast data transmission using a second receiving beam corresponding to a second TCI state. In some examples, the resource allocation manager 1115 may receive unicast data transmission via the second resource allocation using the second receiving beam. In some examples, the resource allocation manager 1115 may receive at least one MAC control element indicating the first active TCI state set, the second active TCI state set, or both.

[0156] The control signaling receiver 1120 may receive control signaling that indicates a control channel TCI state of a first transmission beam having a first beam width for transmitting DCI within a control channel, wherein the DCI is received within the control channel according to the control channel TCI state.

[0157] The control signaling receiver 1125 may receive control signaling that indicates a first active TCI state set for multi-point data transmission and a second active TCI state set for unicast data transmission.

[0158] In some cases, the first beam width of the control channel transmission beam indicated by the control channel TCI state is different from the second beam width of the second transmission beam indicated by the first TCI state. In some cases, the control channel TCI state corresponds to a first quasi-collocation relationship with a first reference signal, and the first TCI state corresponds to a second quasi-collocation relationship with a second reference signal. In some cases, the first quasi-collocation relationship is different from the second quasi-collocation relationship.

[0159] The data receiver 1130 may receive a multi-point data transmission using a receive beam. In some cases, the multi-point data transmission is a broadcast transmission or a multicast transmission. The control information decoder 1135 may decode DCI that is descrambled from the received bit sequence based on a group identifier assigned to a group including the UE. In some examples, the control information decoder 1135 may decode a second DCI that is descrambled from the received bit sequence based on the UE identifier of the UE, and the second DCI indicates a second resource allocation for a unicast data transmission.

[0160] The TCI manager 1140 may select a first TCI state from a first set of active TCI states based on indexing the first set of active TCI states using an index derived from the DCI. In some examples, the TCI manager 1140 may select a second TCI state from a second set of active TCI states based on indexing the second set of active TCI states using an index derived from the second DCI.

[0161] Figure 12 FIG. shows a system 1200 including a device 1205 that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure. The device 1205 may be an example of the device 905, the device 1005, or the UE 115 described herein or include components of the device 905, the device 1005, or the UE 115. The device 1205 may include components for two-way voice and data communication, including components for sending and receiving communications, including a communication manager 1210, an I / O controller 1215, a transceiver 1220, an antenna 1225, a memory 1230, and a processor 1240. These components may communicate electronically via one or more buses (e.g., bus 1245).

[0162] The communication manager 1210 may perform the following operations: receive DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, and within each resource allocation in the set of resource allocations, a multi-point data transmission is scheduled for transmission; and monitor the first resource allocation for the multi-point data transmission using a receive beam corresponding to the first TCI state assigned to the first resource allocation in the set of resource allocations from the set of TCI states.

[0163] The I / O controller 1215 may manage input and output signals for the device 1205. The I / O controller 1215 may also manage peripheral devices not integrated into the device 1205. In some cases, the I / O controller 1215 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1215 may utilize, such as An operating system such as this or another known operating system. In other cases, the I / O controller 1215 may represent a modem, keyboard, mouse, touch screen, or similar device or interact with the above devices. In some cases, the I / O controller 1215 may be implemented as part of a processor. In some cases, a user may interact with the device 1205 via the I / O controller 1215 or via the hardware components controlled by the I / O controller 1215.

[0164] The transceiver 1220 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1220 may represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1220 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0165] In some cases, the wireless device may include a single antenna 1225. However, in some cases, the device may have more than one antenna 1225 that can simultaneously transmit or receive multiple wireless transmissions.

[0166] The memory 1230 may include random access memory (RAM) and read-only memory (ROM). The memory 1230 may store computer-readable, computer-executable code 1235 that includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, in addition, the memory 1230 may also contain a basic input / output system (BIOS) that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0167] The processor 1240 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1240 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1240. The processor 1240 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1230) to cause the device 1205 to perform various functions (e.g., functions or tasks supporting TCI state operations for multicast).

[0168] Code 1235 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 1235 may be stored in a non-transitory computer-readable medium (e.g., system memory or other type of memory). In some cases, Code 1235 may not be directly executable by the processor 1240, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0169] Figure 13 FIG. 1300 shows a device 1305 that supports TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. The device 1305 may be an example of aspects of the base station 105 as described herein. The device 1305 may include a receiver 1310, a communication manager 1315, and a transmitter 1320. The device 1305 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0170] The receiver 1310 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to TCI state operation for multi-point transmission, etc.). The information may be passed to other components of the device 1305. The receiver 1310 may be an example of aspects of the transceiver 1620 described Figure 16 herein. The receiver 1310 may utilize a single antenna or an antenna array.

[0171] The communication manager 1315 may perform the following operations: sending DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within the set of resource allocations, multi-point data transmission is scheduled for transmission; and sending multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned to the set of resource allocations from the set of TCI states. The communication manager 1315 may be an example of aspects of the communication manager 1610 described herein.

[0172] The communication manager 1315 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1315 or its sub-components may be performed by a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0173] The communication manager 1315 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, in accordance with aspects of the present disclosure, the communication manager 1315 or its subcomponents may be separate and distinct components. In some examples, in accordance with aspects of the present disclosure, the communication manager 1315 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof.

[0174] The transmitter 1320 may send signals generated by other components of the device 1305. In some examples, the transmitter 1320 may be co-located with the receiver 1310 in a transceiver module. For example, the transmitter 1320 may be an example of aspects of the transceiver 1620 described with reference to Figure 16 The transmitter 1320 may utilize a single antenna or an antenna array.

[0175] Figure 14 FIG. 1400 illustrates a device 1405 supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. The device 1405 may be an example of aspects of the device 1305 or the base station 105 described herein. The device 1405 may include a receiver 1410, a communication manager 1415, and a transmitter 1430. The device 1405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0176] The receiver 1410 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to TCI state operation for multi-point transmission, etc.). The information may be passed to other components of the device 1405. The receiver 1410 may be an example of aspects of the transceiver 1620 described with reference to Figure 16 The receiver 1410 may utilize a single antenna or an antenna array.

[0177] The communication manager 1415 may be an example of aspects of the communication manager 1315 described herein. The communication manager 1415 may include a control information transmitter 1420 and a data transmitter 1425. The communication manager 1415 may be an example of aspects of the communication manager 1610 described herein.

[0178] The control information transmitter 1420 may send DCI that indicates a set of resource allocations and corresponding TCI states assigned from a set of TCI states to each resource allocation in the set of resource allocations, within which multi-point data transmission is scheduled for transmission.

[0179] The data transmitter 1425 may send multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned from the set of TCI states to the set of resource allocations.

[0180] The transmitter 1430 may send signals generated by other components of the device 1405. In some examples, the transmitter 1430 may be co-located with the receiver 1410 in a transceiver module. For example, the transmitter 1430 may be an example of aspects of the transceiver 1620 described with reference to Figure 16 The transmitter 1430 may utilize a single antenna or an antenna array.

[0181] Figure 15 FIG. 1500 shows a communication manager 1505 that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure. The communication manager 1505 may be an example of aspects of the communication manager 1315, the communication manager 1415, or the communication manager 1610 described herein. The communication manager 1505 may include a control information transmitter 1510, a data transmitter 1515, and a control signaling transmitter 1520. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0182] The control information transmitter 1510 may send DCI that indicates a set of resource allocations and corresponding TCI states assigned from a set of TCI states to each resource allocation in the set of resource allocations, within which multi-point data transmission is scheduled for transmission.

[0183] In some examples, the control information transmitter 1510 may send DCI scrambled with a group identifier of a UE group. In some examples, the control information transmitter 1510 may send DCI indicating that the set of resource allocations is a TDM resource allocation set.

[0184] In some examples, the control information transmitter 1510 may send DCI indicating that the TDM resource allocation set is a set of time slots or a set of symbol periods. In some examples, the control information transmitter 1510 may send DCI indicating that the set of resource allocations is an FDM resource allocation set.

[0185] In some examples, the control information transmitter 1510 may send a second DCI that indicates a second resource allocation for unicast data transmission and an index to a second TCI state within a second set of active TCI states. In some examples, the control information transmitter 1510 may send at least one MAC control element that indicates the first set of active TCI states, the second set of active TCI states, or both.

[0186] The data transmitter 1515 may send a multi-point data transmission in each resource allocation within the resource allocation set according to a respective TCI state assigned to the resource allocation set in the TCI state set. In some examples, the data transmitter 1515 may send a unicast data transmission according to the second TCI state via the second resource allocation. In some cases, the multi-point data transmission is a broadcast transmission or a multicast transmission.

[0187] The control signaling transmitter 1520 may send control signaling that indicates a control channel TCI state of a first transmission beam having a first beam width for transmitting DCI within a control channel, where the DCI is transmitted within the control channel according to the control channel TCI state. In some examples, the control signaling transmitter 1520 may send control signaling that indicates a first set of active TCI states for multi-point data transmission and a second set of active TCI states for unicast data transmission.

[0188] In some cases, the first beam width of the control channel transmission beam indicated by the control channel TCI state is wider than the second beam width of a second transmission beam indicated by a first TCI state among a plurality of transmission configuration indicator states. In some cases, the control channel TCI state corresponds to a first quasi-co-location relationship with a first reference signal, and the first TCI state among the plurality of transmission configuration indicator states corresponds to a second quasi-co-location relationship with a second reference signal. In some cases, the first quasi-co-location relationship is different from the second quasi-co-location relationship.

[0189] Figure 16 FIG. shows a system 1600 including a device 1605 that supports operation of TCI states for multi-point transmission in accordance with aspects of the present disclosure. The device 1605 may be an example of the device 1305, the device 1405, or the base station 105 as described herein or may include components of the device 1305, the device 1405, or the base station 105. The device 1605 may include components for two-way voice and data communication, including components for sending and receiving communication, including a communication manager 1610, a network communication manager 1615, a transceiver 1620, an antenna 1625, a memory 1630, a processor 1640, and an inter-station communication manager 1645. These components may communicate electronically via one or more buses (e.g., bus 1650).

[0190] The communication manager 1610 may perform the following operations: sending DCI that indicates a resource allocation set and corresponding TCI states assigned to each resource allocation in the resource allocation set from a set of TCI states, and within the resource allocation set, multi-point data transmission is scheduled for transmission; and sending multi-point data transmission in each resource allocation in the resource allocation set according to the corresponding TCI states respectively assigned to the resource allocation set from the set of TCI states.

[0191] The network communication manager 1615 may manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1615 may manage the transmission of data communication for client devices (e.g., one or more UEs 115).

[0192] The transceiver 1620 may communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 1620 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1620 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and demodulating packets received from the antenna.

[0193] In some cases, the wireless device may include a single antenna 1625. However, in some cases, the device may have more than one antenna 1625 that are capable of simultaneously transmitting or receiving multiple wireless transmissions.

[0194] The memory 1630 may include RAM, ROM, or a combination thereof. The memory 1630 may store computer-readable code 1635 that includes instructions that, when executed by a processor (e.g., processor 1640), cause the device to perform various functions described herein. In some cases, in addition, the memory 1630 may further contain a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0195] The processor 1640 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1640 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 1640. The processor 1640 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1630) to cause the device 1605 to perform various functions (e.g., functions or tasks supporting TCI state operations for multi-point transmission).

[0196] The inter-station communication manager 1645 can manage communication with other base stations 105 and can include a controller or scheduler for cooperatively controlling communication with the UE 115 with other base stations 105. For example, the inter-station communication manager 1645 can coordinate the scheduling of transmissions to the UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1645 can provide an X2 interface within the LTE / LTE-A wireless communication network technology to provide communication between the base stations 105.

[0197] The code 1635 can include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. The code 1635 can be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, the code 1635 may not be directly executable by the processor 1640, but can cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0198] Figure 17 A flowchart illustrating a method 1700 for supporting TCI state operation for multi-point transmission in accordance with aspects of the present disclosure is shown. The operations of method 1700 can be implemented by the UE 115 or its components as described herein. For example, the operations of method 1700 can be performed by a communication manager as described with reference to Figures 9 to 12 described. In some examples, the UE can execute an instruction set to control the functional units of the UE to perform the functions described below. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described below.

[0199] At 1705, the UE can receive DCI that indicates a resource allocation set and corresponding TCI states assigned to each resource allocation in the resource allocation set from a TCI state set, and within each resource allocation in the resource allocation set, multi-point data transmission is scheduled for transmission. The operation of 1705 can be performed according to the methods described herein. In some examples, aspects of the operation of 1705 can be performed by a control information receiver as described with reference to Figures 9 to 12 described.

[0200] At 1710, the UE can monitor the first resource allocation for multi-point data transmission using a receive beam corresponding to the first TCI state assigned to the first resource allocation in the resource allocation set from the TCI state set. The operation of 1710 can be performed according to the methods described herein. In some examples, aspects of the operation of 1710 can be performed by a resource allocation manager as described with reference to Figures 9 to 12 described.

[0201] Figure 18 shows a flowchart of a method 1800 that illustrates support for TCI state operation for multi-point transmission in accordance with aspects of the present disclosure. Operations of method 1800 may be implemented by a UE 115 or components thereof as described herein. For example, operations of method 1800 may be performed by a communication manager as described with reference to Figures 9 to 12 described. In some examples, the UE may execute an instruction set to control functional units of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0202] At 1805, the UE may receive DCI that indicates a resource allocation set and corresponding TCI states assigned to each resource allocation in the resource allocation set from a TCI state set, and within each resource allocation in the resource allocation set, multi-point data transmission is scheduled for transmission. The operation of 1805 may be performed according to the methods described herein. In some examples, aspects of the operation of 1805 may be performed by a control information receiver as described with reference to Figures 9 to 12 described.

[0203] At 1810, the UE may decode DCI that is descrambled from a received bit sequence based on a group identifier assigned to a group including the UE. The operation of 1810 may be performed according to the methods described herein. In some examples, aspects of the operation of 1810 may be performed by a control information decoder as described with reference to Figures 9 to 12 described.

[0204] At 1815, the UE may select a first TCI state from a first active TCI state set based on indexing the first active TCI state set using an index derived from the DCI. The operation of 1815 may be performed according to the methods described herein. In some examples, aspects of the operation of 1815 may be performed by a TCI manager as described with reference to Figures 9 to 12 described.

[0205] At 1820, the UE may monitor a first resource allocation for multi-point data transmission using a receive beam corresponding to a first TCI state assigned to the first resource allocation in the resource allocation set from the TCI state set. The operation of 1820 may be performed according to the methods described herein. In some examples, aspects of the operation of 1820 may be performed by a resource allocation manager as described with reference to Figures 9 to 12 described.

[0206] At 1825, the UE may receive control signaling that indicates a first set of active TCI states for multi-point data transmission and a second set of active TCI states for unicast data transmission. The operations at 1825 may be performed according to the methods described herein. In some examples, aspects of the operations at 1825 may be performed by a control information receiver as described with reference to Figures 9 to 12 described.

[0207] Figure 19 FIG. shows a flowchart of a method 1900 that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure. The operations of method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 1900 may be performed by a communication manager as described with reference to Figures 13 to 16 described. In some examples, the base station may execute an instruction set to control the functional units of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0208] At 1905, the base station may transmit DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within which multi-point data transmission is scheduled for transmission. The operations at 1905 may be performed according to the methods described herein. In some examples, aspects of the operations at 1905 may be performed by a control information transmitter as described with reference to Figures 13 to 16 described.

[0209] At 1910, the base station may transmit multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned to the set of resource allocations from the set of TCI states. The operations at 1910 may be performed according to the methods described herein. In some examples, aspects of the operations at 1910 may be performed by a data transmitter as described with reference to Figures 13 to 16 described.

[0210] Figure 20 FIG. shows a flowchart of a method 2000 that supports TCI state operations for multi-point transmission in accordance with aspects of the present disclosure. The operations of method 2000 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 2000 may be performed by a communication manager as described with reference to Figures 13 to 16 described. In some examples, the base station may execute an instruction set to control the functional units of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0211] At 2005, the base station may send control signaling that indicates a first set of active TCI states for multi-point data transmission and a second set of active TCI states for unicast data transmission. The operations at 2005 may be performed according to the methods described herein. In some examples, aspects of the operations at 2005 may be performed by a control signaling transmitter as described with reference to Figures 13 to 16 described.

[0212] At 2010, the base station may send DCI that indicates a set of resource allocations and corresponding TCI states assigned to each resource allocation in the set of resource allocations from a set of TCI states, within which multi-point data transmission is scheduled for transmission. The operations at 2010 may be performed according to the methods described herein. In some examples, aspects of the operations at 2010 may be performed by a control information transmitter as described with reference to Figures 13 to 16 described.

[0213] At 2015, the base station may send multi-point data transmission in each resource allocation in the set of resource allocations according to the corresponding TCI states respectively assigned to the set of resource allocations from the set of TCI states. The operations at 2015 may be performed according to the methods described herein. In some examples, aspects of the operations at 2015 may be performed by a data transmitter as described with reference to Figures 13 to 16 described.

[0214] At 2020, the base station may send a second DCI that indicates a second resource allocation for unicast data transmission and an index to a second TCI state in the second set of active TCI states. The operations at 2020 may be performed according to the methods described herein. In some examples, aspects of the operations at 2020 may be performed by a control information transmitter as described with reference to Figures 13 to 16 described.

[0215] At 2025, the base station may send unicast data transmission via the second resource allocation according to the second TCI state. The operations at 2025 may be performed according to the methods described herein. In some examples, aspects of the operations at 2025 may be performed by a data transmitter as described with reference to Figures 13 to 16 described.

[0216] It should be noted that the methods described herein describe possible implementations, and the operations and steps may be rearranged or otherwise modified, and other implementations are possible. In addition, aspects from two or more methods may be combined.

[0217] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for purposes of example, and the LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond the scope of LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to a variety of other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0218] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0219] Various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0220] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions may also be physically located at various positions, including being distributed such that portions of the functions are implemented at different physical locations.

[0221] A computer-readable medium includes both a non-transitory computer storage medium and a communication medium, where the communication medium includes any medium that facilitates transfer of a computer program from one place to another. The non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example and not limitation, the non-transitory computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store the desired program code units in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. In addition, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable medium.

[0222] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or code. Other examples and implementations are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions can also be physically located in various positions, including being distributed such that portions of the functions are implemented at different physical locations. As used herein (including in the claims), the term "and / or" when used in a list of two or more items means that any one of the listed items can be employed alone or any combination of two or more of the listed items can be employed. For example, if a composition is described as comprising components A, B, and / or C, the composition can comprise: only A; only B; only C; A and B combined; A and C combined; B and C combined; or A, B, and C combined. Further, as used herein (including in the claims), "or" as used in a list of items (e.g., a list that ends with a phrase such as "at least one of" or "one or more of") indicates a disjunctive list such that, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0223] As used herein (including in the claims), "or" as used in a list of items (e.g., a list that ends with a phrase such as "at least one of" or "one or more of") indicates an inclusive list such that, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Further, as used herein, the phrase "at least partially based on" should not be construed as a reference to a closed set of conditions. For example, without departing from the scope of the present disclosure, an example step described as "at least partially based on condition A" can be at least partially based on both condition A and condition B. In other words, as used herein, the phrase "at least partially based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0224] In the drawings, similar components or features may have the same reference numeral. Additionally, various components of the same type may be distinguished by following the reference numeral with a dash and a second numeral, the second numeral being used to distinguish among similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, regardless of the second reference numeral or any other subsequent reference numerals.

[0225] The description set forth herein in connection with the drawings describes example configurations and does not represent all examples that may be implemented or that are within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and not "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described technology, the detailed description includes specific details. However, the technology may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

[0226] This description is provided to enable a person skilled in the art to make or use the present disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not limited to the examples and designs described herein but is accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: Receiving downlink control information that indicates a plurality of resource allocations and respective transmission configuration indicator states assigned to each of the plurality of resource allocations from a plurality of transmission configuration indicator states, wherein within each of the plurality of resource allocations, the same multi-point data transmission is scheduled for transmission, and wherein the multi-point data transmission is a broadcast transmission or a multicast transmission; and Monitoring the first resource allocation for the multi-point data transmission using a receiving beam corresponding to a first transmission configuration indicator state assigned to the first resource allocation among the plurality of resource allocations.

2. The method according to claim 1, wherein Receiving the downlink control information comprises: Receiving the downlink control information scrambled with a group identifier of a group including the UE.

3. The method according to claim 1, wherein, Receiving the downlink control information comprises: Receiving the downlink control information indicating that the plurality of resource allocations are a plurality of time-domain multiplexed resource allocations.

4. The method according to claim 3, wherein, Receiving the downlink control information comprises: Receiving the downlink control information indicating that the plurality of time-domain multiplexed resource allocations are a plurality of time slots or a plurality of symbol periods.

5. The method according to claim 1, wherein Receiving the downlink control information comprises: Receiving the downlink control information indicating that the plurality of resource allocations are a plurality of frequency-domain multiplexed resource allocations.

6. The method according to claim 1, further comprising: Receiving control signaling that indicates a control channel transmission configuration indicator state of a first transmission beam having a first beam width for transmitting the downlink control information within a control channel, wherein the downlink control information is received within the control channel according to the control channel transmission configuration indicator state.

7. The method according to claim 6, wherein, The first beam width of the control channel transmission beam indicated by the control channel transmission configuration indicator state is different from a second beam width of a second transmission beam indicated by the first transmission configuration indicator state.

8. The method according to claim 6, wherein The control channel transmission configuration indicator state corresponds to a first quasi-co-location relationship with a first reference signal, and the first transmission configuration indicator state corresponds to a second quasi-co-location relationship with a second reference signal.

9. The method according to claim 8, wherein, The first quasi-co-location relationship is different from the second quasi-co-location relationship.

10. The method according to claim 1, further comprising: Receiving the multi-point data transmission using the receiving beam.

11. The method according to claim 1, further comprising: Receiving control signaling that indicates a first set of active transmission configuration indicator states for multi-point data transmission and a second set of active transmission configuration indicator states for unicast data transmission.

12. The method according to claim 11, further comprising: Decoding the downlink control information, which is descrambled from a received bit sequence based at least in part on a group identifier assigned to a group including the UE; And Select the first transmission configuration indicator state from the first set of active transmission configuration indicator states by indexing the first set of active transmission configuration indicator states at least in part based on an index derived from the downlink control information.

13. The method according to claim 11, further comprising: Decoding second downlink control information, the second downlink control information being descrambled from a received bit sequence at least in part based on a UE identifier of the UE, the second downlink control information indicating a second resource allocation for unicast data transmission; Selecting a second transmission configuration indicator state from the second set of active transmission configuration indicator states by indexing the second set of active transmission configuration indicator states at least in part based on an index derived from the second downlink control information; And Monitoring the second resource allocation using a second receive beam corresponding to the second transmission configuration indicator state for the unicast data transmission.

14. The method according to claim 13, wherein, Monitoring the second resource allocation includes: Receiving the unicast data transmission via the second resource allocation using the second receive beam.

15. The method according to claim 11, wherein, Receiving the control signaling includes: Receiving at least one medium access control (MAC) control element indicating the first set of active transmission configuration indicator states, the second set of active transmission configuration indicator states, or both.

16. A method for wireless communication by a network device, comprising: Transmitting downlink control information indicating a plurality of resource allocations and corresponding transmission configuration indicator states assigned to each of the plurality of resource allocations from a plurality of transmission configuration indicator states, within the plurality of resource allocations, the same multi-point data transmission being scheduled for transmission, wherein the multi-point data transmission is a broadcast transmission or a multicast transmission; and Transmitting the multi-point data transmission in each of the plurality of resource allocations according to the corresponding transmission configuration indicator states assigned to the plurality of resource allocations from the plurality of transmission configuration indicator states.

17. The method according to claim 16, wherein, Transmitting the downlink control information includes: Transmitting the downlink control information scrambled with a group identifier of a user equipment group.

18. The method according to claim 16, wherein Transmitting the downlink control information includes: Transmitting the downlink control information indicating that the plurality of resource allocations are a plurality of time-domain multiplexed resource allocations.

19. The method according to claim 18, wherein Transmitting the downlink control information includes: Transmitting the downlink control information indicating that the plurality of time-domain multiplexed resource allocations are a plurality of time slots or a plurality of symbol periods.

20. The method according to claim 16, wherein Transmitting the downlink control information includes: Transmitting the downlink control information indicating that the plurality of resource allocations are a plurality of frequency-domain multiplexed resource allocations.

21. The method according to claim 16, further comprising: Transmitting control signaling indicating a control channel transmission configuration indicator state of a first transmission beam having a first beam width for transmitting the downlink control information within a control channel, wherein the downlink control information is transmitted within the control channel according to the control channel transmission configuration indicator state.

22. The method according to claim 21, wherein, The first beam width of the control channel transmission beam indicated by the control channel transmission configuration indicator state is wider than the second beam width of the second transmission beam indicated by the first transmission configuration indicator state among the plurality of transmission configuration indicator states.

23. The method according to claim 21, wherein, The control channel transmission configuration indicator state corresponds to a first quasi - co - location relationship with a first reference signal, and the first transmission configuration indicator state among the plurality of transmission configuration indicator states corresponds to a second quasi - co - location relationship with a second reference signal.

24. The method according to claim 16, further comprising: Sending control signaling that indicates a first set of active transmission configuration indicator states for multi - point data transmission and a second set of active transmission configuration indicator states for unicast data transmission.

25. The method according to claim 24, further comprising: Sending second downlink control information that indicates a second resource allocation for unicast data transmission and an index to a second transmission configuration indicator state in the second set of active transmission configuration indicator states; And Sending the unicast data transmission according to the second transmission configuration indicator state via the second resource allocation.

26. The method according to claim 24, wherein, Sending the control signaling includes: Sending at least one medium access control (MAC) control element that indicates the first set of active transmission configuration indicator states, the second set of active transmission configuration indicator states, or both.

27. An apparatus for wireless communication by a user equipment (UE), comprising: A unit for receiving downlink control information that indicates a plurality of resource allocations and corresponding transmission configuration indicator states assigned to each of the plurality of resource allocations from a plurality of transmission configuration indicator states, wherein within each of the plurality of resource allocations, the same multi - point data transmission is scheduled for transmission, and wherein the multi - point data transmission is a broadcast transmission or a multicast transmission; and A unit for monitoring the first resource allocation for the multi - point data transmission using a reception beam corresponding to the first transmission configuration indicator state assigned to the first resource allocation among the plurality of transmission configuration indicator states.

28. An apparatus for wireless communication by a network device, comprising: A unit for sending downlink control information that indicates a plurality of resource allocations and corresponding transmission configuration indicator states assigned to each of the plurality of resource allocations from a plurality of transmission configuration indicator states, wherein within the plurality of resource allocations, the same multi - point data transmission is scheduled for transmission, and wherein the multi - point data transmission is a broadcast transmission or a multicast transmission; and A unit for sending the multi - point data transmission in each of the plurality of resource allocations according to the corresponding transmission configuration indicator states assigned to the plurality of resource allocations respectively.

29. An apparatus for wireless communication by a user equipment (UE), comprising: A processor, A memory coupled to the processor, and Instructions stored in the memory, the instructions being executable by the processor to cause the device to perform the method according to any one of claims 1 to 15.

30. A device for wireless communication by a network device, comprising: A processor, A memory coupled to the processor, and Instructions stored in the memory, the instructions being executable by the processor to cause the device to perform the method according to any one of claims 16 to 26.

31. A non-transitory computer-readable medium storing code for wireless communication by a user equipment (UE), the code including instructions executable by a processor to perform the method according to any one of claims 1 to 15.

32. A non-transitory computer-readable medium storing code for wireless communication by a network device, the code including instructions executable by a processor to perform the method according to any one of claims 16 to 26.

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