Beam configuration indication for downlink control channel

Abstract

Methods, systems, and apparatus for wireless communication are described to indicate a Single Frequency Network (SFN) mode and associated composite channel reference signals to a User Equipment (UE). The UE and base station can communicate via two or more Transmit and Receive Points (TRPs) using SFN transmissions, which can represent transmissions with multiple beam configurations. The base station can transmit a configuration associated with a control channel, which explicitly or implicitly indicates whether a control channel transmission is associated with an SFN mode or is configured with multiple candidate beam configurations. The base station can transmit an indication of the active beam configuration for the control channel. The UE can receive one or more reference signals from each TRP and, based on the SFN indication, can use information from the one or more reference signals to receive control channel transmissions.

Description

Technical Field

[0001] The following text generally refers to wireless communication, and more specifically, to beam configuration indication for downlink control channels. Background Technology

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems, such as Long Term Evolution (LTE), LTE-A Advanced (LTE-A), or LTE-A Pro systems, and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ technologies 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 Spectrum Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each supporting communication from multiple communication devices simultaneously, which may otherwise be referred to as User Equipment (UE).

[0003] The base station and the UE can communicate via multiple transmit and receive points (TRPs) used for downlink transmission. In some cases, the TRPs may be transparent to the UE, making it impossible for the UE to receive or recognize one or more reference signals from different TRPs. Summary of the Invention

[0004] The described techniques relate to improved methods, systems, apparatuses, and devices for beam configuration indication of downlink control channels. Generally, the described techniques provide indication to a user equipment (UE) of a single-frequency network (SFN) mode and associated composite channel reference signals. For example, the UE and base station may communicate via two or more transmit and receive points (TRPs) to improve communication quality, speed, or throughput via SFN transmissions. Although SFN mode is used herein, SFN mode can more generally refer to an operating mode in which multiple TRPs provide joint transmission (e.g., joint, concurrent, or simultaneous transmissions) on the same set of time and frequency resources. The base station may transmit a configuration associated with the control channel indicating whether the control channel transmission is associated with an SFN mode, wherein the indication of the SFN mode can be explicit or implicit. The UE may receive one or more reference signals from each TRP, and based on the SFN indication, each of the one or more reference signals may be associated with a control channel transmission (e.g., via quasi-cooperative positioning (QCL) state, mode, or relationship). The UE may use information from the one or more reference signals (e.g., channel estimation information) to receive control channel transmissions (e.g., control signals on the control channel).

[0005] SFN mode can be represented as a channel configuration including multiple beam configurations or multiple candidate beam configurations (e.g., one beam configuration for each TRP). In the first example, SFN mode can be explicitly indicated as enabled or disabled in the configuration. The configuration can also configure a number of Transmission Configuration Indicator (TCI) states for the control channel, which can be used to indicate the QCL information of the TRP respectively. The base station can also send control signaling to indicate or activate the beam configuration for each TRP communicating with the UE. In the second example, the configuration can implicitly indicate SFN mode for the control channel. For example, the configuration can configure TCI states for the control channel such that the TCI states indicate two or more types of reference signals for QCL types, relationships, or states. In some cases, the configuration can implicitly indicate SFN mode for control channel transmissions by indicating SFN mode for shared channel transmissions to the UE, where the UE can use the same configuration (e.g., the same TCI states, QCL states or modes, or associated reference signals) for control channel transmissions as for shared channel transmissions.

[0006] A method for wireless communication at a UE is described. The method may include: receiving from a base station an indication of a set of candidate beam configurations for a control channel associated with transmissions via two or more TRPs; receiving an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receiving control signals on the control channel according to the two or more activated beam configurations.

[0007] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions can be executed by the processor to cause the apparatus to: receive from a base station an indication of a set of candidate beam configurations for a control channel associated with transmissions via two or more TRPs; receive an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receive control signals on the control channel according to the two or more activated beam configurations.

[0008] Another apparatus for wireless communication at a UE is described. The apparatus may include components for receiving from a base station an indication of a set of candidate beam configurations for a control channel associated with transmissions via two or more TRPs; receiving an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receiving control signals on the control channel according to the two or more activated beam configurations.

[0009] A non-transitory computer-readable medium is described for storing code for wireless communication at a UE. The code may include instructions executable by a processor to: receive from a base station an indication of a set of candidate beam configurations for a control channel associated with transmissions via two or more Transmission Points (TRPs); receive an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receive control signals on the control channel according to the two or more activated beam configurations.

[0010] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication for receiving a set of candidate beam configurations for a control channel may include operations, features, components or instructions for receiving signaling configured for a control channel in an SFN mode.

[0011] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, signaling that configures a control channel for an SFN mode configures an SFN mode for one or more of a search space or a bandwidth portion (BWP) associated with the control channel.

[0012] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication for receiving a set of candidate beam configurations for a control channel may include operations, features, components or instructions for receiving signaling that configures two or more downlink reference signals for a QCL type for a TCI state of the control channel.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving via signaling an indication of an instance of two or more QCL information of a QCL type, each instance of QCL information being associated with a corresponding downlink reference signal among two or more downlink reference signals.

[0014] Examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving QCL information for a QCL type via signaling, which may be associated with two or more downlink reference signals.

[0015] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, an indication of a candidate beam configuration set for a control channel may include operations, features, components or instructions for receiving an indication of a second candidate beam configuration set for a shared channel associated with the control channel, the second candidate beam configuration set including the candidate beam configuration set.

[0016] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, receiving an indication to activate two or more beam configurations may include operations, features, components or instructions for receiving an indication to activate each of a set of candidate beam configurations for a control channel, wherein the set of candidate beam configurations includes two or more activated beam configurations.

[0017] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, receiving an indication to activate two or more beam configurations may include operations, features, components or instructions for receiving an indication to activate one of a set of candidate beam configurations for a control channel and one or more other beam configurations.

[0018] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, receiving an indication to activate two or more beam configurations may include operations, features, components or instructions for receiving an indication to activate two or more candidate beam configurations for a control channel, the two or more candidate beam configurations including two or more activated beam configurations.

[0019] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, receiving an indication to activate two or more beam configurations may include operations, features, components or instructions for receiving an indication to activate two or more other beam configurations different from any one of a set of candidate beam configurations for a control channel, the two or more other beam configurations including two or more activated beam configurations.

[0020] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, receiving the indication may include operations, features, components or instructions for receiving an indication of the configuration of a control resource set (CORESET) for a candidate beam configuration set for a control channel.

[0021] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the CORESET configuration indication for the control channel may be configurable for more than sixty-four TCI states.

[0022] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the candidate beam configuration set may be associated with the SFN state.

[0023] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication of a candidate beam configuration set may be received in RRC (RRC) signaling.

[0024] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication to activate two or more beam configurations may be received in a Media Access Control (MAC) control element (CE).

[0025] A method for wireless communication at a base station is described. The method may include: sending to a UE an indication of a set of candidate beam configurations for a control channel associated with transmissions from two or more Transmission Points (TRPs); determining two or more beam configurations to be activated for the control channel based on the candidate beam configuration set; sending an indication of activating the two or more beam configurations for the control channel; and transmitting control signals on the control channel via the two or more TRPs based on the two or more activated beam configurations.

[0026] An apparatus for wireless communication at 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 can be executed by the processor to cause the apparatus to: send to a UE an indication of a set of candidate beam configurations for a control channel associated with transmissions from two or more Transmission Points (TRPs); determine two or more beam configurations to be activated for the control channel based on the candidate beam configuration set; send an indication of activating the two or more beam configurations for the control channel; and transmit control signals on the control channel via the two or more TRPs based on the two or more activated beam configurations.

[0027] Another apparatus for wireless communication at a base station is described. The apparatus may include components for: transmitting to a UE an indication of a set of candidate beam configurations for a control channel associated with transmissions from two or more Transmission Points (TRPs); determining two or more beam configurations to be activated for the control channel based on the candidate beam configuration set; transmitting an indication of activating the two or more beam configurations for the control channel; and transmitting control signals on the control channel via the two or more TRPs based on the two or more activated beam configurations.

[0028] A non-transitory computer-readable medium is described for storing code for wireless communication at a base station. The code may include instructions executable by a processor to: send to a UE an indication of a set of candidate beam configurations for a control channel associated with transmissions from two or more Transmission Points (TRPs); determine two or more beam configurations to be activated for the control channel based on the candidate beam configuration set; send an indication of activating the two or more beam configurations for the control channel; and transmit control signals on the control channel via the two or more TRPs based on the two or more activated beam configurations.

[0029] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication for transmitting a set of candidate beam configurations for a control channel may include operations, features, components or instructions for transmitting signaling for configuring the control channel for an SFN mode.

[0030] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, signaling configuring a control channel for an SFN mode configures an SFN mode for one or more of the search space associated with the control channel or the BWP associated with the control channel.

[0031] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication for transmitting a candidate beam configuration set for a control channel may include operations, features, components or instructions for transmitting signaling for QCL type configuration of two or more downlink reference signals for the TCI state of the control channel.

[0032] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for transmitting via signaling an indication of two or more instances of QCL information of a QCL type, each instance of QCL information being associated with a corresponding downlink reference signal among two or more downlink reference signals.

[0033] Examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for transmitting QCL information for a QCL type via signaling, which may be associated with two or more downlink reference signals.

[0034] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication to transmit a candidate beam configuration set for a control channel may include operations, features, components or instructions for transmitting an indication to a second candidate beam configuration set for a shared channel associated with the control channel, the second beam configuration set including the candidate beam configuration set.

[0035] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, sending an indication to activate two or more beam configurations may include operations, features, components or instructions for sending an indication to activate each of a set of candidate beam configurations for a control channel, wherein the set of candidate beam configurations includes two or more activated beam configurations.

[0036] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, sending an indication to activate two or more beam configurations may include operations, features, components or instructions for sending an indication to activate one of a set of candidate beam configurations for a control channel and one or more other beam configurations.

[0037] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, sending an indication to activate two or more beam configurations may include operations, features, components or instructions for sending an indication to activate two or more candidate beam configurations for a control channel, the two or more candidate beam configurations including two or more activated beam configurations.

[0038] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, sending an indication to activate two or more beam configurations may include operations, features, components or instructions for sending an indication to activate two or more other beam configurations different from any one of a candidate beam configuration set for a control channel, the two or more other beam configurations including two or more activated beam configurations.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a transmission indication may include an operation, feature, component, or instruction for transmitting an indication of a CORESET configuration for a set of candidate beam configurations for a control channel.

[0040] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the CORESET configuration indication can be directed to the control channel, and more than sixty-four TCI states can be configurable.

[0041] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the candidate beam configuration set may be associated with the SFN state.

[0042] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, an indication of a candidate beam configuration set may be sent in RRC signaling.

[0043] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, an instruction to activate two or more beam configurations may be sent in a MAC CE. Attached Figure Description

[0044] Figure 1 Examples of wireless communication systems according to various aspects of this disclosure are shown.

[0045] Figure 2 Examples of wireless communication systems according to various aspects of this disclosure are shown.

[0046] Figure 3A and Figure 3B Examples of signaling schemes according to various aspects of this disclosure are shown.

[0047] Figure 4 Examples of control information according to various aspects of this disclosure are shown.

[0048] Figure 5 Examples of process flows according to various aspects of this disclosure are shown.

[0049] Figure 6 and Figure 7 A block diagram of an apparatus according to various aspects of this disclosure is shown.

[0050] Figure 8 A block diagram of a communication manager according to various aspects of this disclosure is shown.

[0051] Figure 9 A schematic diagram of a system including devices according to various aspects of this disclosure is shown.

[0052] Figure 10 and Figure 11 A block diagram of an apparatus according to various aspects of this disclosure is shown.

[0053] Figure 12 A block diagram of a communication manager according to various aspects of this disclosure is shown.

[0054] Figure 13 A schematic diagram of a system including devices according to various aspects of this disclosure is shown.

[0055] Figures 14 to 17 A flowchart illustrating various aspects of the methods according to this disclosure is shown. Detailed Implementation

[0056] For example, a user equipment (UE) and a base station can communicate via two or more transmit and receive points (TRPs) to improve communication quality, speed, or throughput. For instance, the UE and base station can communicate via a first TRP and a second TRP corresponding to the base station (e.g., when UE 115 is on a high-speed train (HST)). While the example described herein involves two TRPs, it will be understood that the same example can be applied to any number of TRPs (e.g., more than two TRPs). In some cases, the first and second TRPs can concurrently or simultaneously transmit the same downlink signal to the UE using the same frequency. This downlink signal can be referred to as a single-frequency network (SFN) signal, or a signal having an SFN mode or operating according to that SFN mode (e.g., an SFN-ed signal). In some cases, the UE can receive an SFN downlink signal as if it were receiving a single downlink signal (e.g., from the UE's perspective, the UE cannot distinguish or may not be able to distinguish between an SFN signal received from one TRP (e.g., an SFN downlink data signal) and an SFN signal received from a second TRP (e.g., a corresponding SFN downlink data signal)). Although SFN mode is used here, SFN mode can more generally refer to an operational mode in which multiple TRPs provide transmissions (e.g., joint, concurrent, or simultaneous transmissions) on the same set of time and frequency resources. Therefore, where “SFN mode” is used here, other terms involving equivalent technologies can be used instead.

[0057] Communication between the UE and the first and second TRPs can represent multi-antenna transmissions, where the first and second TRPs can transmit downlink information to the UE concurrently or simultaneously, for example, using SFN modes. In some cases, SFN transmissions from the first and second TRPs to the UE (e.g., control channel signals, shared channel signals, or both) can represent composite (also referred to as combined, joint, etc.) channels, which can be estimated using Quasi-Cooperative Positioning (QCL) state information or one or more other channel attributes, among other examples. As used herein, a QCL state can refer to one or more QCL relationships and can also refer to or be referred to as a QCL mode. In some cases, the first and second TRPs can be associated with different downlink channel attributes (e.g., spatial or other transmission attributes, such as different QCL states), such that if the UE is unaware of the SFN mode, the UE may not be able to use the corresponding composite channel to decode or receive the corresponding signals from the first and second TRPs.

[0058] For example, if the UE is unaware of the SFN mode, it may expect to receive one set of reference signals for the channel, rather than two sets of reference signals for the composite channel (e.g., one set for each TRP). If the UE is unaware of the SFN mode, it may process communication based on a single set of reference signals, which could lead to communication errors or degraded communication quality, speed, or throughput. Therefore, this disclosure provides techniques for indicating the SFN mode and composite channel reference signals to the UE.

[0059] For example, the base station can send a configuration associated with the control channel indicating whether control channel transmission is associated with SFN mode, where the indication of SFN mode can be explicit or implicit. In the first example, SFN mode can be explicitly indicated as enabled or disabled in the configuration. The configuration can also configure a number of Transmission Configuration Indicator (TCI) states for the control channel, which can be used to indicate the QCL information of the first and second TRPs, respectively. The base station can also send control signaling to indicate or activate the TCI state of each TRP communicating with the UE.

[0060] In the second example, this configuration can implicitly indicate the SFN mode of the control channel. For example, this configuration can configure a TCI state for the control channel such that the TCI state indicates two or more types of reference signals for a QCL type or state. If the UE receives a configuration indicating multiple reference signals for a QCL type, the UE can determine that the associated control channel transmission is SFN. To indicate multiple reference signals, the TCI state can be associated with multiple instances of QCL information, each of which can be associated with a reference signal, or the QCL type of the TCI state can be associated with one instance of QCL information, and the instance of QCL information can be associated with multiple reference signals. In some cases, this configuration can implicitly indicate the SFN mode of the control channel transmission by indicating the SFN mode of the shared channel transmission to the UE, where the UE can use the same configuration (e.g., the same TCI state, QCL state, or associated reference signal) for the control channel transmission as it does for the shared channel transmission.

[0061] In the examples described herein, for instance, based on implicit or explicit indications in the configuration, the UE can determine that SFN mode is enabled for control channel transmissions. The UE can receive one or more reference signals from each TRP, and based on the SFN indication, can determine that each of these one or more reference signals is associated with a control channel transmission (e.g., via QCL state or relationship). The UE can use information from the one or more reference signals (e.g., channel estimation information) to receive control channel transmissions (e.g., control signals on the control channel).

[0062] The various aspects of this disclosure were initially described in the context of wireless communication systems. These aspects are further illustrated and described with reference to signaling schemes, control information, process flows, apparatus diagrams, system diagrams, and flowcharts relating to beam configuration indication for downlink control channels.

[0063] Figure 1 Examples of a wireless communication system 100 according to various aspects of this disclosure are shown. 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 a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (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, communication with low-cost and low-complexity devices, or any combination thereof.

[0064] Base stations 105 can be distributed throughout a geographical area to form a wireless communication system 100, and can be devices of different forms or with different capabilities. Base stations 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110, on which UE 115 and base station 105 can establish one or more communication links 125. Coverage area 110 can be an example of a geographical area, on which base station 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0065] UE 115 can be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary, mobile, or both at different times. UE 115 can be devices of different forms or with different capabilities. Figure 1 Some example UE 115s are shown in the document. The UE 115 described herein is capable of communicating with various types of devices, such as other UE 115s, base station 105, or network equipment (e.g., core network nodes, relay equipment, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 As shown.

[0066] Base station 105 may communicate with core network 130, communicate with each other, or both. For example, base station 105 may interface with core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base station 105 may communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) or both via backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, backhaul link 120 may be or include one or more radio links.

[0067] One or more base stations 105 described herein may include, or may be referred to by those skilled in the art as, base station, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next-generation NodeB or gigabit NodeB (any of which may be referred to as gNB), home NodeB, home eNodeB or other suitable terms.

[0068] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client, among other examples. UE 115 may also include or 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, 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, among other examples, and these devices may be implemented in various objects such as appliances or vehicles, meters, and other examples.

[0069] The UE 115 described in this document can communicate with various types of devices, such as other UE 115s that can sometimes act as relays, as well as base station 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, and other examples, such as... Figure 1 As shown.

[0070] UE 115 and base station 105 can wirelessly communicate with each other via one or more carriers through one or more communication links 125. The term "carrier" can refer to a set of radio spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels of 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 coordinating carrier operation, user data, or other signaling. Wireless communication system 100 can use carrier aggregation or multi-carrier operation to support communication with UE 115. Depending on the carrier aggregation configuration, UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0071] The signal waveform transmitted on a carrier can consist of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In systems employing MCM, a resource element can consist of a symbol period (e.g., the duration of a modulation 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). Therefore, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0072] The time interval between base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as T. s =1 / (Δf) max ·N f The sampling period is ) seconds, where Δf max This can represent the maximum supported subcarrier spacing, and N f This can represent the maximum supported Discrete Fourier Transform (DFT) size. The time intervals of communication resources can be organized according to radio frames, each with 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).

[0073] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N) f Sampling period. The duration of a symbol period can depend on the subcarrier spacing or the operating frequency band.

[0074] A subframe, time slot, micro-time slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0075] Physical channels can be multiplexed on a carrier using various techniques. For example, one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. The control region of a physical control channel (e.g., a control resource set (CORESET)) can be defined by multiple symbol periods and can be extended across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) can be configured for a group of UEs 115. For example, one or more UEs 115 can monitor or search for control regions for control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates can refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with 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 particular UE 115.

[0076] In some examples, base station 105 may be mobile, and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may 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 various geographic coverage areas 110.

[0077] Wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 can be designed to support ultra-reliable, low-latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private or group communication and can be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVIDeo), or Mission-Critical Data (MCData). Support for mission-critical functions can include service prioritization, and mission-critical services can be used for public safety or general business applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency are used interchangeably herein.

[0078] In some examples, UE 115 is also capable of communicating directly with other UE 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, a group of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UE 115s without involving base station 105.

[0079] Core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), access and mobility management function (AMF)) managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), packet data network (PDN) gateway (P-GW), or user plane function (UPF)) routing packets or interconnects to external networks. The control plane entity can manage non-access stratum (NAS) functions of UE 115 served by base station 105 associated with core network 130, such as mobility, authentication, and bearer management. 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 connect to network operator IP service 150. Operator IP service 150 may include access to the Internet, intranet(s), IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0080] Some network devices (such as base station 105) may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 through one or more other access network transmitting entities 145, which may be referred to as a radio head, smart radio head, or transmit / receive point (TRP). Each access network transmitting entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., base station 105).

[0081] Wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 MHz to 300 GHz. The region from 300 MHz to 3 GHz is generally referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength range is from approximately 1 decimeter to 1 meter. UHF waves may be blocked or redirected by buildings and environmental features, but these waves can penetrate structures sufficiently to allow a macrocell to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the spectrum below 300 MHz, UHF wave transmissions may be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0082] Wireless communication system 100 can utilize licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 can employ Licensed Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5 GHz Industrial, Scientific, and Medical (ISM) band. When operating in unlicensed radio spectrum bands, devices such as base station 105 and UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed bands can be based on carrier aggregation configurations that combine component carriers operating in licensed bands (e.g., LAA). Operation in unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0083] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with multiple rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, antenna panels may support radio frequency beamforming of signals transmitted via antenna ports.

[0084] Base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. This technique can be referred to as spatial multiplexing. For example, multiple signals can be sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals can be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO). In single-user MIMO, multiple spatial layers are sent to the same receiving device, and in multi-user MIMO, multiple spatial layers are sent to multiple devices.

[0085] Beamforming, also known as spatial filtering, directional transmission, or directional reception, is a signal processing technique used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or redirect an antenna beam (e.g., transmit beam, receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that some signals propagating with respect to a particular orientation of the antenna array experience constructive interference, while others experience destructive interference. Adjustments to signals transmitted via antenna elements can include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element can be defined by a beamforming weight set associated with a particular orientation (e.g., the antenna array of the transmitting or receiving device, or with respect to some other orientation).

[0086] Base station 105 or UE 115 may use beam scanning technology as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device such as base station 105, or by a receiving device such as UE 115) the beam direction for later transmission or reception by base station 105.

[0087] Some signals, such as data signals associated with a specific receiving device, may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device, such as UE 115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication that UE 115 received a signal with the highest signal quality or other acceptable signal quality.

[0088] In some examples, transmission by a device (e.g., base station 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and this feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)), which may be precoded or unprecoded. UE 115 may provide feedback on beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel codebook, linear combination codebook, port selection codebook). Although these techniques are described in reference base station 105 for transmitting signals in one or more directions, UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam direction for subsequent transmission or reception by UE 115) or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0089] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105, the receiving device (e.g., UE 115) can attempt multiple receiving configurations (e.g., directional listening). For example, the receiving device can attempt multiple receiving directions (any of which can be referred to as "listening") by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different sets of receiving beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different sets of directional listening weights), or by processing the received signals according to different sets of receiving beamforming weights applied to signals received at multiple antenna elements of the antenna array. In some examples, the receiving device can use a single receiving configuration to receive along a single beam direction (e.g., when receiving data signals). The single receiving configuration can be aligned on a beam direction determined based on listening according to different receiving configuration directions (e.g., a beam direction determined based on listening according to multiple beam directions to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality).

[0090] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer can perform packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer can perform priority processing and multiplexing logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between the UE 115 and the base station 105 or core network 130 supporting radio bearers for user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0091] In some cases, one or more TCI states can be configured and activated for UE 115 for downlink transmissions from base station 105 (e.g., downlink shared channel transmissions or downlink control channel transmissions). For example, one or more TCI states can be configured via RRC signaling, wherein up to 64 TCI states can be configured for the control channel and up to 128 TCI states can be configured for the shared channel. MAC control elements (CEs) and DCIs can be sent to the UE to activate TCI states for the shared channel, and MAC CEs can be sent to the UE to activate TCI states for the control channel. TCI states can include parameters for configuring QCL relationships between one or two downlink reference signals and DMRS ports of the shared channel, control channel, or CSI-RS resource. TCI states can indicate QCL relationships for a first downlink reference signal (e.g., QCL Type-1) and QCL relationships for a second downlink reference signal (e.g., QCL Type-2), allowing up to two QCL relationships to be configured for TCI states.

[0092] In some cases, UE 115 may be configured with a TCI state for the control channel CORESET, allowing UE 115 to assume the QCL relationship between the control channel and (multiple) downlink reference signals is specified by the TCI state. In this case, UE 115 can identify the active TCI state with or without activation from MAC CE. In other cases, multiple TCI states may be configured for the CORESET, allowing MAC CE to be used to activate the TCI state for the control channel and identify UE 115's TCI state for application on the control channel. In some cases, UE 115 may not receive MAC CE and may be configured with multiple TCI states. In this case, UE 115 may assume the QCL relationship between the control channel and (multiple) downlink reference signals selected during the initial access procedure (e.g., a default TCI based on beam scanning).

[0093] For example, UE 115 and base station 105 can communicate via two or more TRPs to improve communication quality, speed, or throughput via SFN transmission. Base station 105 can send a configuration associated with the control channel, indicating whether the control channel transmission is associated with an SFN mode, where the SFN mode indication can be explicit or implicit. UE 115 can receive one or more reference signals from each TRP, and based on the SFN indication, can determine that each of these one or more reference signals is associated with a control channel transmission (e.g., via QCL state or relationship). UE 115 can use information from the one or more reference signals (e.g., channel estimation information) to receive control channel transmissions (e.g., control signals on the control channel).

[0094] Figure 2 Examples of wireless communication systems 200 according to various aspects of this disclosure are shown. In some examples, wireless communication system 200 may implement aspects of wireless communication system 100. For example, wireless communication system 200 may include UE 115-a and base station 105 (not shown), which may be references Figure 1 Examples of UE 115 and base station 105 are described herein. The wireless communication system 200 may also include two or more TRPs 210, wherein UE 115-a can communicate with base station 105 via at least two or more TRPs 210. For example, the wireless communication system 200 may include TRPs 210-a and TRPs 210-b, which may correspond to base station 105. Although the example described herein involves two TRPs 210, it will be understood that the same example can be applied to any number of TRPs 210 (e.g., more than two TRPs 210).

[0095] UE 115-a can estimate the properties of the channel (e.g., a shared channel or a control channel) used for transmissions from TRP 210-a and 210-b based on one or more reference signals transmitted on the channel. Among other examples, channel properties may include phase variations, frequency offsets, channel synchronization, interference characteristics, or channel distortion. Channel estimation (e.g., channel property estimation) can support the reception of downlink transmissions, among other examples. The QCL state can support channel estimation at UE 115-a by indicating the relationship between different channels associated with different downlink transmissions received at different antenna ports. For example, the QCL state can indicate the relationship between a reference signal and a corresponding antenna port of a control channel or shared channel (e.g., or its reference signal). UE 115-a can determine the channel properties of a first antenna port (e.g., the reference signal) and apply those channel properties to a second antenna port (e.g., the shared or control channel).

[0096] In some cases, the QCL state can indicate one or more reference signals (e.g., reference signal ports) that can be used for channel estimation for one or more antenna ports of a downlink channel. For example, base station 105 can configure UE 115-a with a QCL state indicating that one or more antenna ports used for downlink reference signals (e.g., synchronization signal block (SSB) or CSI-RS) are QCL-bound (e.g., sharing one or more channel attributes) with one or more antenna ports of downlink channels (e.g., physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), or CSI-RS). UE 115-a can receive QCL information from base station 105 via a configuration indicating the QCL state (e.g., TCI state configuration).

[0097] QCL information can indicate the relationship between antenna ports and the QCL type associated with that relationship. A QCL relationship, pattern, or type can indicate a relationship between two signals for one or more of Doppler shift, Doppler spread, average delay, or one or more spatial reception parameters. For example, a first QCL relationship, pattern, or type can indicate a relationship between two signals for Doppler shift, Doppler spread, and average delay, such as QCL-TypeA (e.g., associating channel attributes including Doppler shift, Doppler spread, average delay, and delay spread). In another example, a second QCL relationship, pattern, or type can indicate a relationship between two signals for Doppler shift and Doppler spread, such as QCL-TypeB (e.g., associating channel attributes including Doppler shift and Doppler spread). In yet another example, a third QCL relationship, pattern, or type can indicate a relationship between two signals for average delay and Doppler spread, such as QCL-TypeC (e.g., associating channel attributes including Doppler shift and average delay). In another example, a fourth QCL relationship, mode, or type can indicate the relationship between two signals for one or more spatial reception parameters, such as QCL-TypeD (e.g., associating channel attributes that include one or more spatial reception parameters).

[0098] In some multi-TRP deployments, two or more TRPs 210 can communicate downlink signals (e.g., reference signals or other downlink signals) to UE 115-a. For example, UE 115-a may be located on HST 205 and may receive downlink signals from two TRPs 210. In some cases, two or more TRPs 210 may concurrently or simultaneously transmit the same downlink signal (e.g., a combined SFN downlink signal) to UE 115-a using the same frequency. Such a downlink signal may be referred to as an SFN-ed downlink signal or a downlink signal with an SFN mode or state. Additionally or alternatively, such a downlink signal may be referred to as including multiple beam configurations or multiple candidate beam configurations (e.g., one beam configuration for each TRP 210). An SFN-ed downlink signal may represent nearly simultaneous transmissions from two or more geographically separated antennas (e.g., from two or more TRPs 210). In some cases, UE 115-a can receive downlink signals from SFN as if UE 115-a were receiving a single downlink signal.

[0099] In some cases, TRPs 210-a and 210-b can send independent reference signals to UE 115-a (e.g., for independent channel estimation), and UE 115-a can use the independent reference signals to perform channel estimation with antenna ports of the independent reference signal's port QCL. For example, UE 115-a can use the independent reference signals to receive or decode downlink signals for SFN using antenna ports of the independent reference signal's antenna port QCL. For example, the DMRS port corresponding to SFN transmissions on a shared channel or control channel can be QCLed (e.g., associated) with one or more antenna ports of the reference signal (e.g., SSB or CSI-RS). UE 115-a can use information from one or more antenna ports of the reference signal to support channel estimation for SFN transmissions.

[0100] While the techniques described herein can be applied to high-speed scenarios, such as HST-SFN scenarios, these techniques can also be used for any type of communication link where UE 115 communicates with multiple TRPs 210 using SFN mode or a similar communication mode. In one example, an HST wireless network may include a group of TRPs 210 spaced along a high-speed railway, where UE 115-a may communicate with a certain number (e.g., two) of the group of TRPs 210 (e.g., TRPs 210-a and 210-b) in the downlink and / or uplink.

[0101] Communication between UE 115-a and TRPs 210-a and 210-b can represent multi-antenna transmissions, where TRPs 210-a and 210-b can, for example, send downlink information to UE 115-a concurrently or simultaneously using SFN mode. In some cases, TRPs 210-a and 210-b can be transparent to UE 115-a, making it possible for UE 115-a to be unaware of which TRP 210 the transmission originates from, or even from both TRPs 210. In some cases, SFN transmissions from TRPs 210-a and 210-b to UE 115-a (e.g., control channel signals, shared channel signals, or both) can represent composite channels, which can be estimated using QCL state information or one or more other channel attributes, among other examples.

[0102] In some cases, the SFN mode may be transparent to UE 115-a, making it unaware that the downlink signal corresponds to the SFN. However, in other cases, TRPs 210-a and 210-b may be associated with different downlink channel properties (e.g., spatial or other transport properties, such as different QCL states), meaning that if UE 115-a is unaware of the SFN mode, it may be unable to use the corresponding composite channel to decode or receive the corresponding signals from TRPs 210-a and 210-b. For example, if UE 115-a is unaware of the SFN mode, it may expect to receive one reference signal set for the channel, rather than two reference signal sets for the composite channel (e.g., one for each TRP 210). If UE 115-a is unaware of the SFN mode, it may process communication based on a single reference signal set, potentially leading to communication errors or reduced communication quality, speed, or throughput. Therefore, this disclosure provides techniques for indicating SFN mode and composite channel reference signal to UE 115 (e.g., UE115-a).

[0103] For example, base station 105 may transmit configuration 215 (e.g., RRC configuration) for one or more of the BWP, CORESET, or search space used for control channel transmission 225. Configuration 215 may be transmitted via TRP 210-a, TRP 210-b, another TRP 210, or any combination thereof. Configuration 215 may indicate whether the control channel transmission 225 associated with the configured BWP, CORESET, or search space is associated with an SFN mode, wherein the indication of the SFN mode may be explicit or implicit. For example, in configuration 215 (e.g., in a CORESET configuration), the SFN mode may be explicitly indicated as enabled or disabled. Configuration 215 may also configure multiple TCI states for the BWP, CORESET, or search space. In some cases, configuration 215 may support configuring up to 64 TCI states, while in other cases, configuration 215 may support configuring more than 64 TCI states. In some cases, two configured TCI states or two other TCI states can be used to indicate QCL information for two TRPs 210 respectively. For example, control signaling 220 (e.g., MAC CE) from base station 105 can indicate or activate the TCI state of each TRP 210 (e.g., TRPs 210-a and 210-b) communicating with UE 115-a. Control signaling 220 can be sent via TRP 210-a, TRP 210-b, another TRP 210, or any combination thereof.

[0104] In some cases, configuration 215 can implicitly indicate the SFN mode for control channel transmission 225. For example, configuration 215 can configure a TCI state for control channel transmission 225 (e.g., for the associated CORESET) such that the TCI state indicates two or more types of reference signals for QCL type or state. If UE 115-a receives configuration 215 indicating multiple reference signals for TCI state or QCL type, UE 115-a can determine that the associated control channel transmission 225 is SFN.

[0105] In the first example, the QCL type of the TCI state can be associated with multiple (e.g., two or more) instances of QCL information, where each instance of QCL information can be associated with a reference signal. In some cases, each instance of QCL information can also be associated with TRP 210 among multiple TRP 210s (e.g., TRP 210-a or 210-b) serving UE 115-a. In the second example, the QCL type of the TCI state can be associated with one instance of QCL information, and the instance of QCL information can be associated with two or more reference signals. In some cases, each reference signal can be associated with TRP 210 among multiple TRP 210s (e.g., TRP 210-a or 210-b) serving UE 115-a.

[0106] In some cases, this configuration can implicitly indicate the SFN mode for control channel transmission 225 by indicating the SFN mode for shared channel transmission to UE 115-a. Base station 105 can configure UE 115-a to use the same configuration for control channel transmission 225 as for shared channel transmission (e.g., the same TCI state, QCL state, or associated reference signal).

[0107] In any of the examples described herein, for example, based on an implicit or explicit indication in configuration 215, UE 115-a may determine that SFN mode is enabled for control channel transmission 225. UE 115-a may receive one or more reference signals from each TRP 210, and based on the SFN indication, may determine that each of the one or more reference signals is associated with control channel transmission 225 (e.g., via QCL state or relationship). UE 115-a may use information from the one or more reference signals (e.g., channel estimation information) to receive control channel transmission 225 (e.g., control signals on the control channel).

[0108] Figure 3A and Figure 3BExamples of signaling schemes 301 and 302 according to various aspects of this disclosure are shown. In some examples, signaling schemes 301 and 302 may implement aspects of wireless communication system 100 or 200. For example, signaling schemes 301 and 302 may be implemented by UE 115 (not shown) and base station 105 (not shown), which may be references Figure 1 and Figure 2 Examples of UE 115 and base station 105 are described. Signaling schemes 301 and 302 can also be implemented by two or more TRPs, wherein UE 115-a can communicate with base station 105 via two or more TRPs. For example, signaling schemes 301 and 302 can be implemented by two TRPs (not shown) that correspond to base station 105. Although the example described herein involves two TRPs, it will be understood that the same example can be applied to any number of TRPs (e.g., more than two TRPs).

[0109] In some cases, the reference signal 310 (e.g., tracking reference signal (TRS), CSI-RS, or CRS) and SSB 305 can be transmitted separately or independently from each TRP. Figure 3A In the example shown, the first TRP can send SSB 305-a to UE 115, and the second TRP can independently send SSB 305-b to UE 115. Similarly, the first TRP can send reference signal 310-a to UE 115, and the second TRP can independently send reference signal 310-b to UE 115. Figure 3B In the example shown, the first TRP can send SSB 305-c to UE 115, and the second TRP can independently send SSB 305-d to UE 115. Similarly, the first TRP can send reference signal 310-c to UE 115, and the second TRP can independently send reference signal 310-d to UE 115. UE 115 can be configured with multiple QCL states (e.g., reference signal relationships), where each QCL state can be associated with a reference signal 310 of one of the TRPs. For example, UE 115 can be configured with multiple TCI states (e.g., one TCI state for each TRP), where each TCI state can include QCL state information of the reference signal 310 of one of the TRPs.

[0110] For reference Figure 2As described, UE 115 can receive a configuration indicating that downlink channel transmission 315 (e.g., control channel transmission) is associated with an SFN mode. For example, the SFN mode can represent the state of the UE receiving transmissions from two or more TRPs, where each TRP can be associated with a different reference signal QCL relationship for the downlink channel transmission 315. In such a configuration, UE 115 can independently estimate the Doppler profile and other channel characteristics for each TRP. Because channel characteristics can be estimated independently for each TRP, downlink channel transmission 315 can support improved channel estimation performance, for example, compared to a configuration where UE 115 may not be aware of the SFN mode. For example, the DMRS of downlink channel transmission 315 can be associated with multiple CSI-RS (e.g., one or more CSI-RS for each TRP), which can improve channel estimation performance (e.g., because transmissions from each TRP can be associated with different channel characteristics and different corresponding reference signal characteristics).

[0111] In some examples, signaling scheme 301 may represent a scheme that associates downlink channel transmission 315-a (e.g., control channel transmission) with reference signals 310-a and 310-b from two corresponding TRPs, wherein one DMRS port of downlink channel transmission 315-a may share a QCL relationship (e.g., may be QCL-dependent) with reference signals 310-a and 310-b. The DMRS of downlink channel transmission 315-a may be dependent based on the QCL relationship with both reference signals 310-a and 310-b. Therefore, signaling scheme 301 can support composite channel estimation using a single DMRS port, which can reduce DMRS overhead. In one example, each DMRS port of downlink channel transmission 315-a may be associated with two TCI states (e.g., one TCI state for each TRP), and each TCI state may include or indicate corresponding QCL state information.

[0112] In some examples, signaling scheme 302 may represent a scheme that associates downlink channel transmission 315-b (e.g., control channel transmission) with reference signals 310-c and 310-d from two corresponding TRPs, wherein multiple DMRS ports of downlink channel transmission 315-b may share a QCL relationship (e.g., may be QCL-based) with reference signals 310-a or 310-b. Based on this QCL relationship, the DMRS of downlink channel transmission 315-a may be independent. Therefore, signaling scheme 302 may support composite channel estimation using multiple DMRS ports. In one example, reference signal 310-c may be associated with a first DMRS port group (DMRS port group 320-a), and reference signal 310-d may be associated with a second DMRS port group (DMRS port group 320-b). Each data layer of the downlink channel transmission 315-b can be associated with two TCI states (e.g., one TCI state for each TRP) via a port in DMRS port group 320-a and a port in DMRS port group 320-b.

[0113] In some cases, the reference signal 310 represented by signaling scheme 301 or 302 can be associated with one TCI state instead of two TCI states. For example, as reference Figure 2 A TCI state can indicate the relationship between a QCL type and two or more reference signals 310. For example, a TCI state can indicate the relationship between a QCL type and reference signals 310-a and 310-b, or between a QCL type and reference signals 310-c and 310-d.

[0114] In a first example of a TCI state, the TCI state can indicate a QCL relationship through multiple instances of QCL information supporting a QCL type. For example, the TCI state can indicate a TCI state identifier (ID), a first QCL type, and a second optional QCL type. The first and second QCL types can each be configured to be associated with multiple corresponding instances of QCL information, for example, up to the number of TRPs communicating with UE 115 via SFN mode. Each instance of QCL information can be associated with a reference signal 310 (e.g., SSB or CSI-RS) such as via a reference signal resource ID (e.g., CSI-RS resource ID) or an index (e.g., SSB index). Each instance of QCL information can also indicate whether the QCL state is associated with a QCL type (e.g., QCLType-A, QCL Type-B, QCL Type-C, or QCL Type-D). In some cases, an instance of QCL information can indicate the serving cell index or BWP ID associated with the QCL information.

[0115] In a second example of a TCI state, the TCI state can indicate the relationship between a QCL type and multiple reference signals 310 by supporting multiple reference signals 310 for QCL type QCL information. The TCI state can indicate a TCI state identifier (ID), a first QCL type, and a second optional QCL type, where each QCL type can be associated with a corresponding QCL information (e.g., an instance of QCL information). The QCL information can be associated with multiple reference signals 310 (e.g., SSB or CSI-RS), for example, up to the number of TRPs communicating with UE 115 via SFN mode. Each reference signal 310 can be indicated via a corresponding reference signal resource ID (e.g., CSI-RS resource ID) or index (e.g., SSB index). The QCL information can also indicate whether the QCL state is associated with QCL Type-A, QCL Type-B, QCL Type-C, or QCL Type-D. In some cases, the QCL information can indicate the serving cell index or BWP ID associated with the QCL information.

[0116] In any of the examples described herein, UE 115 may receive one or more reference signals 310 from each TRP, and based on SFN indication, may determine that each of the one or more reference signals 310 is associated with downlink channel transmission 315 (e.g., via QCL state or relationship). UE 115 may use information from the one or more reference signals 310 (e.g., channel estimation information) to receive downlink channel transmission 315 (e.g., control signals on the control channel).

[0117] Figure 4 Examples of control information 400 according to various aspects of this disclosure are shown. In some examples, control information 400 may implement aspects of wireless communication system 100 or 200. For example, control information 400 may be used by UE 115 (not shown) and base station 105 (not shown), which may be references Figure 1 - An example of UE 115 and base station 105 depicted in Figure 3. Control information 400 can also be used or transmitted by two or more TRPs, where UE 115 can communicate with base station 105 via two or more TRPs. For example, control information 400 can be used by two TRPs (not shown), which can correspond to base station 105. Although the example described herein involves two TRPs, it will be understood that the same example can be applied to any number of TRPs (e.g., more than two TRPs).

[0118] For reference Figure 2The two TRPs can transmit one or more downlink signals (e.g., downlink control signals on the control channel) using the SFN mode. In some cases, the SFN mode can be explicitly or implicitly indicated by a configuration sent by base station 105 to UE 115. This configuration can also configure multiple sets of TCI states for UE 115 (e.g., for the control channel), wherein two or more of the configured TCI states can be used to indicate the QCL information of each of the two TRPs respectively. For example, control signaling (e.g., MAC CE) from base station 105 can indicate or activate the TCI state of each TRP communicating with UE 115. The control signaling may include examples of control information 400.

[0119] For example, control signaling may include an indication of the serving cell ID 405 associated with the control channel, and one or more instances of the CORESET ID 410 associated with the control channel. Control signaling may also activate multiple TCI states; for example, there may be one TCI state for each TRP communicating with UE 115 in SFN mode for the control channel. In one example, control signaling may indicate TCI state ID 415-a for a first TRP communicating with UE 115 and TCI state ID 415-b for a second TRP communicating with UE 115. In some cases, each ID in the control signaling may be represented by a certain number of bits, where each type of ID may correspond to a different number of bits. In one example, the serving cell ID 405 may be represented by five bits, the CORESET ID 410 by four bits, and each TCI state ID 415 may be represented by seven bits respectively. In some cases, control signaling may also indicate the TRP associated with each corresponding TCI status ID 415, for example, using the bit associated with TCI status ID 415 or other bits.

[0120] In the first example, the configuration from the base station can configure two TCI states for UE 115, and UE 115 can determine that each of the two TCI states corresponds to a corresponding TRP, and can activate or use both TCI states for SFN communication. For example, control signaling can indicate the TCI state ID 415 for each of the corresponding TCI states. Additionally or optionally, UE 115 can determine that the number of configured TCI states is equal to the number of TRPs communicating with UE 115 in SFN mode, based on which UE 115 can further determine that each of the two TCI states corresponds to a corresponding TRP (e.g., where the association between TCI states and TRPs can be indicated via control signaling).

[0121] In the second example, this configuration can configure a TCI state for UE 115. In some cases, control signaling can indicate (e.g., activate) the configured TCI state via a first TCI state ID 415 (e.g., TCI state ID 415-a), and can provide or activate a second TCI state via a second TCI state ID 415 (e.g., TCI state ID 415-b). In some cases, the second TCI state may not be configured via configuration from base station 105. In some cases, control signaling can indicate or activate two TCI states via TCI state ID 415, wherein the two activated TCI states may not include the configured TCI state. As described herein, UE 115 can activate or use both indicated TCI states 415 for SFN communication.

[0122] In the third example, this configuration can configure more than two TCI states for UE 115, and control signaling can (e.g., via TCI state ID 415) indicate or activate two of the configured TCI states. If the control signaling fails to indicate or activate two of the configured TCI states (e.g., activates one of the TCI states), the control signaling can trigger an error condition at UE 115, and in some cases, UE 115 can report the error condition to base station 105. If the control signaling indicates or activates two of the configured TCI states, then as described herein, UE 115 can activate or use both indicated TCI states 415 for SFN communication.

[0123] Figure 5 Examples of process flow 500 according to various aspects of this disclosure are shown. In some examples, process flow 500 may implement various aspects of wireless communication system 100 or 200. Process flow 500 may include or be implemented by base station 105-a and UE 115-b, which may be referenced. Figures 1-4 Examples of base station 105 and UE 115 are described. Process flow 500 may illustrate an example where UE 115-b can be notified of an SFN mode for downlink signals and can activate two or more beam configurations for receiving downlink signals (e.g., control signals) from base station 105-a. As described herein, control signals can be sent to UE 115-b via two or more TRPs (e.g., using SFN states). In some cases, base station 105-a may be associated with each of the two or more TRPs, or in some cases, base station 105-a may be associated with at least one of the two or more TRPs. In some cases, as described herein, UE 115-b may be located on an HST.

[0124] At 505, base station 105-a can send to UE 115-b an indication of multiple candidate beam configurations for the control channel (e.g., an indication of SFN mode), wherein the control channel may be associated with control signal transmissions via two or more TRPs. In some examples, the indication of multiple candidate beam configurations may include, or be included in, an RRC message or RRC configuration. For example, the RRC configuration may include a display indication of an SFN mode transmitted via control channels (e.g., via CORESET configuration) through two or more TRPs.

[0125] In some cases, the RRC configuration may exclude explicit indication of the SFN mode and may include implicit indication of the SFN mode, for example, via indication of multiple reference signals associated with the TCI state indicated in the RRC configuration (e.g., via QCL information of the TCI state). In some cases, the QCL type of the TCI state may be associated with multiple instances of QCL information (e.g., one for each of multiple candidate beam configurations or two or more TRPs), and each instance of QCL information may be associated with a reference signal. In some cases, the QCL information of the QCL type of the TCI state may be associated with multiple reference signals (e.g., one for each of multiple candidate beam configurations or two or more TRPs).

[0126] In 510, base station 105-a can determine two or more beam configurations to be activated for the control channel based on multiple candidate beam configurations. For example, base station 105-a can identify two or more TRPs associated with control channel transmissions (e.g., control signal transmissions) to UE 115-b, and can activate these two or more beam configurations based on the identification of the two or more TRPs. In some cases, each of the two or more activated beam configurations may correspond to a TRP among the two or more TRPs. In some cases, determining the beam configuration corresponding to a TRP among the two or more TRPs may be based on one or more channel or spatial characteristics associated with that TRP.

[0127] In 515, base station 105-a can send an indication to UE 115-b to activate two or more beam configurations for the control channel. In some examples, the indication to activate two or more beam configurations can be received via control signaling (such as via MACCE). See references herein. Figure 4A first example of an indication to activate two or more beam configurations may include an indication for UE 115-b to activate each of a plurality of candidate beam configurations. For example, the plurality of candidate beam configurations may represent a plurality of TCI states (e.g., two TCI states), and base station 105-a may send an indication to activate a plurality of TCI states. In a second example, an indication to activate two or more beam configurations may instruct UE 115-b to activate one of a plurality of candidate beam configurations and one or more other beam configurations. For example, the plurality of candidate beam configurations may represent a plurality of TCI states (e.g., two TCI states), and base station 105-a may send an indication to activate one of a plurality of TCI states and an additional TCI state.

[0128] In the third example, the indication to activate two or more beam configurations can instruct UE 115-b to activate two or more other beam configurations different from the multiple candidate beam configurations. For example, the multiple candidate beam configurations can represent multiple TCI states (e.g., two TCI states), and base station 105-a can send an indication to activate two or more TCI states not included in the multiple TCI states. In the fourth example, the indication to activate two or more beam configurations can instruct UE 115-b to activate two or more other configurations among the multiple candidate beam configurations. For example, the multiple candidate beam configurations can represent multiple TCI states (e.g., two TCI states), and base station 105-a can send an indication to activate two or more TCI states among the multiple TCI states.

[0129] At 520, base station 105-a can transmit control signals to UE 115-b on the control channel based on two or more active beam configurations, and UE 115-b can receive control signals on the control channel based on two or more active beam configurations. In some cases, base station 105-a can transmit control signals via two or more TRPs. For example, base station 105-a can transmit control signals via PDCCH based on two or more active beam configurations associated with two or more TRPs. In some cases, base station 105-a can transmit control signals via one of two or more TRPs based on the beam configuration associated with that TRP (e.g., TCI state or QCL state), and UE 115-b can receive control signals from that TRP using the beam configuration associated with that TRP (e.g., associated with one or more reference signals of that TRP).

[0130] Figure 6A block diagram 600 of a device 605 according to various aspects of this disclosure is shown. Device 605 may be an example of an aspect of UE 115 as described herein. Device 605 may include a receiver 610, a communication manager 615, and a transmitter 620. Device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0131] Receiver 610 can receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indication for downlink control channels), such as packets, user data, or control information. This information can be passed to other components of device 605. Receiver 610 can be a reference. Figure 9 Examples of aspects of the transceiver 920 described. The receiver 610 may utilize a single antenna or a set of antennas.

[0132] Communication manager 615 can receive from a base station an indication of a set of candidate beam configurations for a control channel associated with transmissions via two or more TRPs; receive an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receive control signals on the control channel according to the two or more activated beam configurations. Communication manager 615 may be an example of an aspect of communication manager 910 described herein.

[0133] The communication manager 615 or its sub-components can be implemented in hardware, processor-executable code (e.g., software or firmware), or any combination thereof. If implemented in processor-executable code, the functionality of the communication manager 615 or its sub-components can be operated by any combination of a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or other components designed to perform the functions described in this disclosure.

[0134] The communication manager 615 or its subcomponents may be physically located in various locations, including being distributed such that some functions are implemented by one or more physical components in different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 615 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 615 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, other computing devices, one or more other components described in this disclosure, or combinations thereof).

[0135] Transmitter 620 can transmit signals generated by other components of device 605. In some examples, transmitter 620 may co-locate with receiver 610 in a transceiver module. For example, transmitter 620 may be a reference... Figure 9 Examples of aspects of the transceiver 920 described. The transmitter 620 may utilize a single antenna or a set of antennas.

[0136] The actions performed by the communication manager 615 described herein, along with other examples, can be implemented to achieve one or more potential advantages. For example, the communication manager 615 can improve channel quality and throughput, and reduce interference at the wireless device (e.g., UE 115), by supporting the identification of reference signals for multiple TRPs in SFN mode. Compared to other systems and techniques, such as those that do not support the identification of SFN mode for transmissions involving multiple TRPs, the identification of SFN mode can reduce latency, interference, and power consumption (or any combination thereof). Therefore, the communication manager 615 can save power and increase battery life at the wireless device (e.g., UE 115) by strategically improving communication quality.

[0137] Figure 7 A block diagram 700 of a device 705 according to various aspects of this disclosure is shown. Device 705 may be an example of an aspect of device 605 or UE 115 as described herein. Device 705 may include a receiver 710, a communication manager 715, and a transmitter 735. Device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0138] Receiver 710 can receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indication for downlink control channels), such as packets, user data, or control information. This information can be transmitted to other components of device 705. Receiver 710 can serve as a reference. Figure 9 Examples of aspects of the transceiver 920 described. The receiver 710 may utilize a single antenna or a set of antennas.

[0139] Communication manager 715 may be an example of an aspect of communication manager 615 as described herein. Communication manager 715 may include configuration receiving component 720, activation receiving component 725, and control signal receiving component 730. Communication manager 715 may be an example of an aspect of communication manager 910 described herein.

[0140] The configuration receiving component 720 can receive from the base station an indication of a candidate beam configuration set for a control channel associated with transmissions via two or more TRPs.

[0141] The activation receiving component 725 can receive an indication to activate two or more beam configurations based on a candidate beam configuration set for the control channel.

[0142] The control signal receiving component 730 can receive control signals on the control channel according to a configuration of two or more active beams.

[0143] Transmitter 735 can transmit signals generated by other components of device 705. In some examples, transmitter 735 may coexist with receiver 710 in a transceiver module. For example, transmitter 735 may be a reference... Figure 9 Examples of aspects of the transceiver 920 described. The transmitter 735 can utilize a single antenna or a set of antennas.

[0144] The processor of the wireless device (e.g., as referenced) Figure 9 The control receiver 710, transmitter 735, or transceiver 920 can improve communication reliability and accuracy by reducing interference and improving communication quality and available power. Reduced interference can improve communication quality and throughput, and compared to other systems and technologies that, for example, do not support SFN mode indications (which may increase interference and power consumption), this can reduce power consumption (e.g., via implementing reference). Figure 8 (The system components described herein). Furthermore, the processor of UE 115 can identify one or more aspects of the SFN mode indication and multiple reference signals associated with the SFN mode to perform the procedures described herein. The processor of the wireless device can use the SFN mode indication and multiple reference signals to perform one or more actions, which can result in lower interference and power consumption, as well as power savings and increased battery life at the wireless device (e.g., by strategically increasing communication quality and throughput), and other benefits.

[0145] Figure 8 A block diagram 800 of a communication manager 805 according to various aspects of this disclosure is shown. The communication manager 805 may be an example of aspects of the communication manager 615, communication manager 715, or communication manager 910 described herein. The communication manager 805 may include a configuration receiving component 810, an activation receiving component 815, and a control signal receiving component 820. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0146] The configuration receiving component 810 can receive from the base station an indication of a candidate beam configuration set for a control channel, which is associated with transmissions via two or more TRPs. In some examples, the configuration receiving component 810 can receive signaling configuring a control channel for an SFN mode.

[0147] In some examples, the configuration receiving component 810 can receive signaling that configures two or more downlink reference signals for the QCL type of the TCI state used for the control channel. In some examples, the configuration receiving component 810 can receive signaling indicating instances of two or more QCL information for a QCL type, each instance of QCL information being associated with a corresponding downlink reference signal among the two or more downlink reference signals. In some examples, the configuration receiving component 810 can receive signaling indicating that instances of QCL information for a QCL type are associated with two or more downlink reference signals.

[0148] In some examples, the configuration receiving component 810 may receive an indication of a second candidate beam configuration set for a shared channel associated with the control channel, the second beam configuration set including the candidate beam configuration set. In some examples, the configuration receiving component 810 may receive a CORESET configuration indicating the candidate beam configuration set for the control channel.

[0149] In some cases, signaling configuring the control channel for SFN modes configures one or more of the search space or BWPs associated with the control channel. In some cases, the CORESET configuration indication is for the control channel, and more than 64 TCI states are configurable. In some cases, candidate beam configuration sets are associated with SFN states. In some cases, indications of candidate beam configuration sets are received in RRC signaling.

[0150] The activation receiving component 815 can receive an indication to activate two or more beam configurations based on a candidate beam configuration set for the control channel. In some examples, the activation receiving component 815 can receive an indication to activate each of the candidate beam configuration sets for the control channel, wherein the candidate beam configuration set includes two or more active beam configurations. In some examples, the activation receiving component 815 can receive an indication to activate one of the candidate beam configuration sets for the control channel, as well as one or more other beam configurations.

[0151] In some examples, the activation receiving component 815 may receive an indication to activate two or more candidate beam configurations in a set of candidate beam configurations for the control channel, the two or more candidate beam configurations including two or more active beam configurations. In some examples, the activation receiving component 815 may receive an indication to activate two or more other beam configurations different from any one in the set of candidate beam configurations for the control channel, the two or more other beam configurations including two or more active beam configurations. In some cases, the indication to activate two or more beam configurations is received in the MACCE.

[0152] The control signal receiving component 820 can receive control signals on the control channel according to a configuration of two or more active beams.

[0153] Figure 9 A schematic diagram of a system 900 including device 905 according to various aspects of this disclosure is shown. Device 905 may be an example of a component of device 605, device 705, or UE 115 as described herein, or may include components of device 605, device 705, or UE 115 as described herein. Device 905 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 910, an I / O controller 915, a transceiver 920, an antenna 925, a memory 930, and a processor 940. These components may be in electronic communication via one or more buses (e.g., bus 945).

[0154] The communication manager 910 can receive from the base station an indication of a candidate beam configuration set for a control channel associated with transmissions via two or more TRPs; receive an indication for activating two or more beam configurations based on the candidate beam configuration set for the control channel; and receive control signals on the control channel according to the two or more activated beam configurations.

[0155] The I / O controller 915 can manage input and output signals to the device 905. The I / O controller 915 can also manage peripheral devices not integrated into the device 905. In some cases, the I / O controller 915 can represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 915 can utilize an operating system, such as... Or other known operating systems. In other cases, the I / O controller 915 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 915 may be implemented as part of a processor. In some cases, a user may interact with the device 905 via the I / O controller 915 or hardware components controlled by the I / O controller 915.

[0156] As described above, transceiver 920 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 920 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 920 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.

[0157] In some cases, a wireless device may include a single antenna 925. However, in other cases, a device may have more than one antenna 925, which is capable of transmitting or receiving multiple wireless transmissions concurrently.

[0158] Memory 930 may include random access memory (RAM) and read-only memory (ROM). Memory 930 may store computer-readable, computer-executable code 935, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 930 may contain a basic I / O system (BIOS), which controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0159] Processor 940 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, processor 940 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 940. Processor 940 may be configured to execute computer-readable instructions stored in memory (e.g., memory 930) to cause device 905 to perform various functions (e.g., functions or tasks supporting beam configuration indication for downlink control channels).

[0160] Code 935 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 935 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 935 may not be directly executed by processor 940, but may enable a computer (e.g., when compiled and run) to perform the functions described herein.

[0161] Figure 10 A block diagram 1000 of a device 1005 according to various aspects of this disclosure is shown. Device 1005 may be an example of an aspect of base station 105 as described herein. Device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1020. Device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0162] Receiver 1010 can receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indication for downlink control channels), such as packets, user data, or control information. This information can be transmitted to other components of device 1005. Receiver 1010 can serve as a reference. Figure 13Examples of aspects of the transceiver 1320 described. The receiver 1010 may utilize a single antenna or a set of antennas.

[0163] Communication manager 1015 may send to the UE an indication of a candidate beam configuration set for a control channel associated with transmissions from two or more TRPs; determine two or more beam configurations to be activated for the control channel based on the candidate beam configuration set; send an indication of activating the two or more beam configurations for the control channel; and transmit control signals on the control channel via the two or more TRPs based on the two or more activated beam configurations. Communication manager 1015 may be an example of an aspect of communication manager 1310 described herein.

[0164] The communication manager 1015 or its sub-components can be implemented in hardware, processor-executable code (e.g., software or firmware), or any combination thereof. If implemented in processor-executable code, the functionality of the communication manager 1015 or its sub-components can be performed by a general-purpose processor, DSP, ASIC, 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 this disclosure.

[0165] The communication manager 1015 or its subcomponents may be physically located in various locations, including being distributed such that some functions are implemented by one or more physical components in different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 1015 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 1015 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, I / O components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof).

[0166] Transmitter 1020 can transmit signals generated by other components of device 1005. In some examples, transmitter 1020 may co-occur with receiver 1010 in a transceiver module. For example, transmitter 1020 may be a reference... Figure 13 Examples of aspects of the transceiver 1320 described. The transmitter 1020 may utilize a single antenna or a set of antennas.

[0167] Figure 11 A block diagram 1100 of a device 1105 according to various aspects of this disclosure is shown. Device 1105 may be an example of an aspect of device 1005 or base station 105 as described herein. Device 1105 may include a receiver 1110, a communication manager 1115, and a transmitter 1140. Device 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0168] Receiver 1110 can receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indication for downlink control channels), such as packets, user data, or control information. This information can be transmitted to other components of device 1105. Receiver 1110 can serve as a reference. Figure 13 Examples of aspects of the transceiver 1320 described. The receiver 1110 may utilize a single antenna or a set of antennas.

[0169] Communication manager 1115 may be an example of an aspect of communication manager 1015 as described herein. Communication manager 1115 may include configuration transmission component 1120, beam configuration determination component 1125, activation transmission component 1130, and control signal transmission component 1135. Communication manager 1115 may be an example of an aspect of communication manager 1310 described herein.

[0170] The configuration transmission component 1120 can send an indication to the UE of a candidate beam configuration set for a control channel associated with transmissions from two or more TRPs. The beam configuration determination component 1125 can determine, based on the candidate beam configuration set, two or more beam configurations to be activated for the control channel.

[0171] The activation transmission component 1130 can send an instruction to activate two or more beam configurations for the control channel. The control signal transmission component 1135 can transmit control signals on the control channel via two or more TRPs based on two or more activated beam configurations.

[0172] Transmitter 1140 can transmit signals generated by other components of device 1105. In some examples, transmitter 1140 may co-occur with receiver 1110 in a transceiver module. For example, transmitter 1140 may be a reference... Figure 13 Examples of aspects of the transceiver 1320 described. The transmitter 1140 may utilize a single antenna or a set of antennas.

[0173] Figure 12 A block diagram 1200 of a communication manager 1205 according to various aspects of this disclosure is shown. The communication manager 1205 may be an example of aspects of the communication manager 1015, communication manager 1115, or communication manager 1310 described herein. The communication manager 1205 may include a configuration transmission component 1210, a beam configuration determination component 1215, an activation transmission component 1220, and a control signal transmission component 1225. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0174] The configuration transmission component 1210 can send an indication to the UE of a candidate beam configuration set for a control channel, which is associated with transmissions from two or more TRPs. In some examples, the configuration transmission component 1210 can send signaling to configure the control channel for SFN mode.

[0175] In some examples, the configuration transmission component 1210 may send signaling that it configures two or more downlink reference signals for the QCL type of the TCI state used for the control channel. In some examples, the configuration transmission component 1210 may send signaling an indication of instances of two or more QCL information for a QCL type, each instance of QCL information being associated with a corresponding downlink reference signal among the two or more downlink reference signals. In some examples, the configuration transmission component 1210 may send signaling an indication of instances of QCL information for a QCL type being associated with two or more downlink reference signals.

[0176] In some examples, configuration transmission component 1210 may transmit an indication of a second candidate beam configuration set for a shared channel associated with the control channel, the second beam configuration set including the candidate beam configuration set. In some examples, configuration transmission component 1210 may transmit a CORESET configuration indicating the candidate beam configuration set for the control channel.

[0177] In some cases, signaling configuring the control channel for SFN modes configures one or more of the search space or BWPs associated with the control channel. In some cases, the CORESET configuration indication is for the control channel, and more than sixty-four TCI states are configurable. In some cases, candidate beam configuration sets are associated with SFN states. In some cases, indications of candidate beam configuration sets are sent in RRC signaling.

[0178] The beam configuration determination component 1215 can determine two or more beam configurations to be activated for the control channel based on a set of candidate beam configurations.

[0179] The activation transmission component 1220 can send an indication to activate two or more beam configurations for the control channel. In some examples, the activation transmission component 1220 can send an indication to activate each of a candidate beam configuration set for the control channel, wherein the candidate beam configuration set includes two or more active beam configurations. In some examples, the activation transmission component 1220 can send an indication to activate one of the candidate beam configuration sets for the control channel, as well as one or more other beam configurations.

[0180] In some examples, the activation transmission component 1220 may send an indication to activate two or more candidate beam configurations in a set of candidate beam configurations for the control channel, the two or more candidate beam configurations including two or more active beam configurations. In some examples, the activation transmission component 1220 may send an indication to activate two or more other beam configurations different from any one in the set of candidate beam configurations for the control channel, the two or more other beam configurations including two or more active beam configurations. In some cases, the indication to activate two or more beam configurations is sent in MACCE.

[0181] The control signal transmission component 1225 can transmit control signals on the control channel via two or more TRPs based on two or more active beam configurations.

[0182] Figure 13 A schematic diagram of a system 1300 including device 1305 according to various aspects of this disclosure is shown. Device 1305 may be an example of a component of device 1005, device 1105, or base station 105 described herein, or may include a component of device 1005, device 1105, or base station 105 described herein. Device 1305 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 1310, a network communication manager 1315, a transceiver 1320, an antenna 1325, a memory 1330, a processor 1340, and an inter-station communication manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350).

[0183] The communication manager 1310 can send an indication to the UE of a set of candidate beam configurations for a control channel associated with transmissions from two or more TRPs; determine two or more beam configurations to be activated for the control channel based on the set of candidate beam configurations; send an indication of activating two or more beam configurations for the control channel; and transmit control signals on the control channel via two or more TRPs based on the two or more activated beam configurations.

[0184] The network communication manager 1315 can manage (e.g., via one or more wired backhaul links) communication with the core network. For example, the network communication manager 1315 can manage the transmission of data communication to client devices (such as one or more UEs 115).

[0185] As described above, transceiver 1320 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 1320 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1320 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.

[0186] In some cases, a wireless device may include a single antenna 1325. However, in other cases, a device may have more than one antenna 1325, which is capable of transmitting or receiving multiple wireless transmissions concurrently.

[0187] Memory 1330 may include RAM, ROM, or a combination thereof. Memory 1330 may store computer-readable code 1335 including instructions that, when executed by a processor (e.g., processor 1340), cause the device to perform the various functions described herein. In some cases, memory 1330 may contain a BIOS, which controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0188] Processor 1340 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, processor 1340 may be configured to use a memory controller to operate a memory array. In some cases, the memory controller may be integrated into processor 1340. Processor 1340 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1330) to cause device 1305 to perform various functions (e.g., functions or tasks supporting beam configuration indication for downlink control channels).

[0189] Inter-site communication manager 1345 can manage communication with other base stations 105 and may include a controller or scheduler for controlling communication with UEs 115 that cooperate with other base stations 105. For example, inter-site communication manager 1345 can coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, inter-site communication manager 1345 may provide an X2 interface in LTE / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0190] Code 1335 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 1335 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 1335 may not be directly executed by processor 1340, but may enable a computer (e.g., when compiled and run) to perform the functions described herein.

[0191] Figure 14 A flowchart illustrating a method 1400 according to various aspects of this disclosure is shown. Operation of method 1400 can be implemented by the UE 115 or its components described herein. For example, operation of method 1400 can be implemented by reference to... Figures 6 to 9 The described communication manager is used to perform this function. In some examples, the UE can run a set of instructions to control the UE's functional elements to perform the functions described below. Alternatively or additionally, the UE can use dedicated hardware to perform aspects of the functions described below.

[0192] At 1405, the UE can receive from the base station an indication of a candidate beam configuration set for a control channel, which is associated with transmissions via two or more TRPs. Operation of 1405 can be performed according to the methods described herein. In some examples, aspects of operation of 1405 can be derived from references... Figures 6 to 9 The described configuration receives the component to execute.

[0193] At 1410, the UE can receive an indication to activate two or more beam configurations based on a candidate beam configuration set for the control channel. The operation of 1410 can be performed according to the methods described herein. In some examples, aspects of the operation of 1410 can be derived from, as referenced... Figures 6 to 9 The described activation receiving component is used to execute.

[0194] In section 1415, the UE can receive control signals on the control channel according to a configuration of two or more active beams. The operation of section 1415 can be performed according to the methods described herein. In some examples, aspects of the operation of section 1415 can be derived from references... Figures 6 to 9 The control signal receiving component described is used to perform this action.

[0195] Figure 15 A flowchart illustrating a method 1500 according to various aspects of this disclosure is shown. Operation of method 1500 can be implemented by the UE 115 or its components described herein. For example, operation of method 1500 can be implemented by reference to... Figures 6 to 9 The described communication manager is used to perform this function. In some examples, the UE can run a set of instructions to control the UE's functional elements to perform the functions described below. Alternatively or additionally, the UE can use dedicated hardware to perform aspects of the functions described below.

[0196] In step 1505, the UE can receive from the base station an indication of a candidate beam configuration set for a control channel, which is associated with transmissions via two or more TRPs. Operation of step 1505 can be performed according to the methods described herein. In some examples, aspects of operation of step 1505 can be derived from references... Figures 6 to 9 The described configuration receives the component to execute.

[0197] In section 1510, the UE can receive signaling configuring the control channel for SFN mode. Operation of section 1510 can be performed according to the methods described herein. In some examples, aspects of operation of section 1510 can be found in references... Figures 6 to 9 The described configuration receives the component to execute.

[0198] In section 1515, the UE can receive an indication to activate two or more beam configurations based on a candidate beam configuration set for the control channel. The operation of section 1515 can be performed according to the methods described herein. In some examples, aspects of the operation of section 1515 can be derived from references... Figures 6 to 9 The described activation receiving component is used to execute.

[0199] In section 1520, the UE can receive control signals on the control channel according to a configuration of two or more active beams. The operation of section 1520 can be performed according to the methods described herein. In some examples, aspects of the operation of section 1520 can be derived from references. Figures 6 to 9 The control signal receiving component described is used to perform this action.

[0200] Figure 16 A flowchart illustrating a method 1600 according to various aspects of this disclosure is shown. Operation of method 1600 can be implemented by the base station 105 or its components as described herein. For example, operation of method 1600 can be implemented by reference to... Figures 10 to 13 The described communication manager is used to execute this. In some examples, the base station may run a set of instructions to control the functional elements of the base station to perform the functions described below. Alternatively or additionally, the base station may use dedicated hardware to perform aspects of the functions described below.

[0201] In step 1605, the base station can send an indication to the UE of a candidate beam configuration set for a control channel associated with transmissions from two or more TRPs. Operation of step 1605 can be performed according to the methods described herein. In some examples, aspects of operation of step 1605 can be derived from references... Figures 10 to 13 The configuration transport component described is used to perform this.

[0202] In 1610, the base station can determine two or more beam configurations to be activated for the control channel based on a set of candidate beam configurations. The operation of 1610 can be performed according to the methods described herein. In some examples, aspects of the operation of 1610 can be derived from, as referenced... Figures 10 to 13 The beam configuration determination component performs this action.

[0203] In step 1615, the base station can send an indication for activating two or more beam configurations for the control channel. The operation of step 1615 can be performed according to the methods described herein. In some examples, aspects of the operation of step 1615 can be derived from, as referenced... Figures 10 to 13 The described activation of the transport component is used to perform this action.

[0204] In 1620, the base station can transmit control signals on the control channel via two or more TRPs based on two or more active beam configurations. The operation of 1620 can be performed according to the methods described herein. In some examples, aspects of the operation of 1620 can be derived from references... Figures 10 to 13 The control signal transmission component described is used to perform this.

[0205] Figure 17 A flowchart illustrating a method 1700 according to various aspects of this disclosure is shown. Operation of method 1700 can be implemented by a base station 105 or its components as described herein. For example, operation of method 1700 can be implemented by reference to... Figures 10 to 13 The described communication manager is used to execute this. In some examples, the base station may run a set of instructions to control the functional elements of the base station to perform the functions described below. Alternatively or additionally, the base station may use dedicated hardware to perform aspects of the functions described below.

[0206] In step 1705, the base station can send an indication to the UE of a candidate beam configuration set for a control channel associated with transmissions from two or more TRPs. Operation of step 1705 can be performed according to the methods described herein. In some examples, aspects of operation of step 1705 can be derived from references... Figures 10 to 13 The configuration transport component described is used to perform this.

[0207] In 1710, the base station can send signaling configuring the control channel for SFN mode. The operation of 1710 can be performed according to the methods described herein. In some examples, aspects of the operation of 1710 can be derived from references... Figures 10 to 13 The configuration transport component described is used to perform this.

[0208] In 1715, the base station can determine two or more beam configurations to be activated for the control channel based on a set of candidate beam configurations. The operation of 1715 can be performed according to the methods described herein. In some examples, aspects of the operation of 1715 can be derived from, as referenced... Figures 10 to 13 The beam configuration determination component performs this action.

[0209] At 1720, the base station can send an indication for activating two or more beam configurations for the control channel. The operation of 1720 can be performed according to the methods described herein. In some examples, aspects of the operation of 1720 can be derived from, as referenced... Figures 10 to 13 The described activation of the transport component is used to perform this action.

[0210] In 1725, the base station can transmit control signals on the control channel via two or more TRPs based on two or more active beam configurations. Operation of 1725 can be performed according to the methods described herein. In some examples, aspects of operation of 1725 can be derived from references... Figures 10 to 13 The control signal transmission component described is used to perform this.

[0211] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0212] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to a variety of other wireless communication systems such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0213] The information and signals described herein can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, symbols, and chips referenced throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0214] The various illustrative blocks and components described herein can 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. A general-purpose processor may be a microprocessor, but alternatively, it may be any processor, controller, microcontroller, or state machine. A 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 combined with a DSP core, or any other such configuration).

[0215] The functions described herein can be implemented using hardware, software running on a processor, firmware, or any combination thereof. If implemented using software running on a processor, the functions can be stored or transmitted as one or more instructions or codes on a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software running on a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions can also be physically located in various locations, including being distributed such that portions of the functions are implemented in different physical locations.

[0216] Computer-readable media includes both non-transitory computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one place to another. Non-transitory storage media can be any available medium accessible by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, optical disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code components 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. Similarly, any connection is appropriately referred to as computer-readable media. For example, 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 media 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. The terms "disk" and "disc" as used in this article include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of these are also included within the scope of computer-readable media.

[0217] As used herein (including in the claims), the word "or" in a list of items (e.g., a list of items ending with phrases such as "at least one of..." or "one or more of...") signifies an inclusive list, such that 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). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" could be based on conditions A and B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0218] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by adding a dash after the reference numeral and a second reference numeral to differentiate similar components. If only the first reference numeral is used in the specification, the description applies to any similar component having the same first reference numeral, regardless of the second or other subsequent reference numerals.

[0219] The description set forth herein, taken in conjunction with the accompanying drawings, describes an example configuration and does not represent all possible examples or all examples within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," and not "preferred" or "superior to other examples." The detailed description includes specific details intended to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concept of the described examples.

[0220] This document provides a description that enables those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but is consistent with the broadest scope of the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: Receive from the base station an indication of multiple candidate beam configurations for a control channel associated with transmissions via two or more transmitting and receiving points; Receive signaling configuring the control channel for single-frequency network mode; Receive an indication for activating two or more beam configurations for the control channel, at least in part based on the plurality of candidate beam configurations; as well as Control signals are received on the control channel depending on the configuration of two or more active beams.

2. The method according to claim 1, wherein, Configure signaling for the control channel for a single-frequency network mode. Configure the single-frequency network mode for one or more of the search space or bandwidth portion associated with the control channel.

3. A method for wireless communication at a base station, comprising: Sending instructions to the user equipment (UE) for multiple candidate beam configurations for a control channel associated with transmissions from two or more transmitting and receiving points; Send signaling to configure the control channel for single-frequency network mode; Based at least in part on the plurality of candidate beam configurations, determine two or more beam configurations to be activated for the control channel; Send an instruction to activate the configuration of the two or more beams for the control channel; as well as Control signals are transmitted on the control channel via the two or more transmitting and receiving points, based at least in part on a configuration of two or more active beams.

4. The method according to claim 3, wherein, Configure signaling for the control channel for a single-frequency network mode. Configure the single-frequency network mode for one or more of the search space or bandwidth portion associated with the control channel.

5. An apparatus for wireless communication at a user equipment (UE), comprising: processor, Memory coupled to the processor; as well as Instructions, stored in memory and executable by a processor, enable the device to: Receive from the base station an indication of multiple candidate beam configurations for a control channel associated with transmissions via two or more transmitting and receiving points; Receive signaling configuring the control channel for single-frequency network mode; Receive an indication for activating two or more beam configurations for the control channel, at least in part based on the plurality of candidate beam configurations; as well as Control signals are received on the control channel depending on the configuration of two or more active beams.

6. The apparatus according to claim 5, wherein, Configure signaling for the control channel for a single-frequency network mode. Configure the single-frequency network mode for one or more of the search space or bandwidth portion associated with the control channel.

7. The apparatus according to claim 5, wherein, Instructions for receiving indications of the configuration of the plurality of candidate beams for the control channel can be executed by the processor to enable the apparatus to: Receive signaling for configuring two or more downlink reference signals for the quasi-cooperative positioning type configuration of the transmission configuration indicator state used for the control channel.

8. The apparatus according to claim 7, wherein, The instructions can also be executed by the processor to enable the device to: The signaling receives an indication of instances of two or more quasi-cooperative positioning information for the quasi-cooperative positioning type, each instance of quasi-cooperative positioning information being associated with a corresponding downlink reference signal among the two or more downlink reference signals.

9. The apparatus according to claim 7, wherein, The instructions can also be executed by the processor to enable the device to: An instance of receiving quasi-cooperative positioning information for the quasi-cooperative positioning type via the signaling is associated with an indication of the two or more downlink reference signals.

10. The apparatus according to claim 5, wherein, The indications for the multiple candidate beam configurations for the control channel include: Receive an indication of a second plurality of candidate beam configurations for a shared channel associated with the control channel, the second plurality of beam configurations including the plurality of candidate beam configurations.

11. The apparatus according to claim 5, wherein, Instructions for receiving indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Receive an indication to activate each of the plurality of candidate beam configurations for the control channel, wherein the plurality of candidate beam configurations includes the two or more activated beam configurations.

12. The apparatus according to claim 5, wherein, Instructions for receiving indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Receive an indication to activate one of the plurality of candidate beam configurations for the control channel, as well as one or more other beam configurations.

13. The apparatus according to claim 5, wherein, Instructions for receiving indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Receive an indication to activate two or more of the plurality of candidate beam configurations for the control channel, wherein the plurality of candidate beam configurations includes the two or more activated beam configurations.

14. The apparatus according to claim 5, wherein, Instructions for receiving indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Receives an indication to activate two or more other beam configurations that differ from any of the plurality of candidate beam configurations for the control channel, the two or more other beam configurations including the two or more activated beam configurations.

15. The apparatus according to claim 5, wherein, Instructions for receiving the indication can be executed by the processor to enable the device to: Receive instructions for the configuration of the control resource set for the multiple candidate beam configurations of the control channel.

16. The apparatus according to claim 15, wherein, The control resource set configuration indication for the control channel has more than sixty-four transport configuration indicator states that are configurable.

17. The apparatus according to claim 5, wherein, The multiple candidate beam configurations are associated with the single-frequency network state.

18. The apparatus according to claim 5, wherein, The indication of the multiple candidate beam configurations is received in the radio resource control signaling.

19. The apparatus according to claim 5, wherein, An instruction to activate the two or more beam configurations is received in the media access control control element.

20. An apparatus for wireless communication at a base station, comprising: processor, Memory coupled to the processor; as well as Instructions, stored in memory and executable by a processor, enable the device to: Sending instructions to the user equipment (UE) for multiple candidate beam configurations for a control channel associated with transmissions from two or more transmitting and receiving points; Send signaling to configure the control channel for single-frequency network mode; Based at least in part on the plurality of candidate beam configurations, determine two or more beam configurations to be activated for the control channel; Send an instruction to activate the configuration of the two or more beams for the control channel; as well as Control signals are transmitted on the control channel via the two or more transmitting and receiving points, based at least in part on a configuration of two or more active beams.

21. The apparatus according to claim 20, wherein, Instructions for transmitting indications of the configuration of the plurality of candidate beams for the control channel can be executed by the processor to enable the apparatus to: Send signaling to configure two or more downlink reference signals for the quasi-cooperative positioning type configuration of the transmission configuration indicator state used for the control channel.

22. The apparatus according to claim 20, wherein, Instructions for transmitting indications of the configuration of the plurality of candidate beams for the control channel can be executed by the processor to enable the apparatus to: Send an indication for a second plurality of candidate beam configurations for a shared channel associated with the control channel, the second plurality of beam configurations including the plurality of candidate beam configurations.

23. The apparatus according to claim 20, wherein, Instructions for sending indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Send an indication to activate each of the plurality of candidate beam configurations for the control channel, wherein the plurality of candidate beam configurations includes the two or more activated beam configurations.

24. The apparatus according to claim 20, wherein, Instructions for sending indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Send an indication to activate one of the plurality of candidate beam configurations for the control channel, as well as one or more other beam configurations.

25. The apparatus according to claim 20, wherein, Instructions for sending indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Send an indication to activate two or more of the plurality of candidate beam configurations for the control channel, the plurality of candidate beam configurations including the two or more activated beam configurations.

26. The apparatus according to claim 20, wherein, Instructions for sending indications to activate the two or more beam configurations can be executed by the processor to enable the device to: Sending an indication to activate two or more other beam configurations that differ from any of the plurality of candidate beam configurations for the control channel, the two or more other beam configurations including the two or more activated beam configurations.

27. An apparatus for wireless communication, comprising components for performing the method of any one of claims 1-4.

28. A computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to perform the method of any one of claims 1-4.

29. A computer program product comprising computer instructions that, when executed by a processor, cause the processor to perform the method of any one of claims 1-4.

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