Beam configuration indication for downlink control channel

Abstract

Methods, systems, and devices are described for wireless communication to indicate a single frequency network (SFN) mode and associated composite channel reference signals to a user equipment (UE). The UE and the base station may communicate via two or more transmit and receive points (TRPs) using SFN transmissions, which may represent transmissions with multiple beam configurations. A base station may transmit a configuration associated with a control channel that explicitly or implicitly indicates whether the control channel transmission is associated with an SFN mode or is configured with a plurality of candidate beam configurations. A base station may send an indication of a beam configuration for activation of a control channel. The UE may receive one or more reference signals from each TRP and may receive a control channel transmission using information from the one or more reference signals based on the SFN indication.

Description

[0001] This application is a divisional application of the invention patent application with the application date of March 26, 2020, application number 202080099026.X, and invention name “Beam configuration indication for downlink control channel”. Technical Field

[0002] The following relates generally to wireless communications and, more particularly, to beam configuration indication for a downlink control channel. Background Art

[0003] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. 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) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread 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 of which simultaneously supports communication with multiple communication devices, which may be otherwise referred to as user equipment (UE).

[0004] The base station and the UE may communicate via multiple transmit and receive points (TRPs) for downlink transmission. In some cases, the TRPs may be transparent to the UE, such that the UE may not be able to receive or recognize one or more reference signals from different TRPs. Summary of the Invention

[0005] The described techniques relate to improved methods, systems, devices, and apparatuses for supporting beam configuration indication for downlink control channels. Generally, the described techniques provide for indicating a single frequency network (SFN) pattern and an associated composite channel reference signal to a user equipment (UE). For example, a UE and a base station may communicate via two or more transmit and receive points (TRPs) to improve communication quality, speed, or throughput via SFN transmission. Although the term SFN pattern is used herein, an SFN pattern may more generally refer to an operating mode in which multiple TRPs provide joint transmissions (e.g., joint, concurrent, or simultaneous transmissions) on the same set of time and frequency resources. The base station may send a configuration associated with a control channel that indicates whether the control channel transmission is associated with the SFN pattern, where the indication of the SFN pattern may be explicit or implicit. The UE may receive one or more reference signals from each TRP and, based on the SFN indication, may determine that each of the one or more reference signals is associated with the control channel transmission (e.g., via a quasi-co-location (QCL) state, pattern, or relationship). The UE may use information (e.g., channel estimation information) from the one or more reference signals to receive the control channel transmission (e.g., a control signal on the control channel).

[0006] The SFN pattern can be represented as a channel configuration that includes multiple beam configurations or multiple candidate beam configurations (e.g., one beam configuration for each TRP). In a first example, the SFN pattern can be explicitly indicated in the configuration as enabled or disabled. The configuration can also configure a certain number of transmission configuration indicator (TCI) states for the control channel, which TCI states 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 a second example, the configuration can implicitly indicate the SFN pattern for the control channel. For example, the configuration can configure the TCI state for the control channel so that the TCI state indicates two or more types of reference signals for QCL types, relationships, or states. In some cases, the configuration can implicitly indicate the SFN pattern for control channel transmission by indicating the SFN pattern for shared channel transmission to the UE, where the UE can use the same configuration for control channel transmission as for shared channel transmission (e.g., the same TCI state, QCL state or pattern, or associated reference signals).

[0007] A method of 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, the control channel being associated with transmission via two or more Transmission Relay Protocols (TRPs), receiving an indication to activate, for the control channel, two or more beam configurations based on the set of candidate beam configurations, and receiving a control signal on the control channel based on the two or more activated beam configurations.

[0008] An apparatus for wireless communication at a user equipment terminal (UE) is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable 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, the control channel being associated with transmission via two or more transmission resource planning (TRPs); receive an indication to activate, for the control channel, two or more beam configurations based on the set of candidate beam configurations; and receive a control signal on the control channel based on the two or more activated beam configurations.

[0009] 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, the control channel being associated with transmission via two or more Transmission Relay Protocols (TRPs), receiving an indication to activate two or more beam configurations based on the set of candidate beam configurations for the control channel, and receiving a control signal on the control channel based on the two or more activated beam configurations.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. 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, the control channel being associated with transmission via two or more Transmission Relay Protocols (TRPs); receive an indication to activate, for the control channel, two or more beam configurations based on the set of candidate beam configurations; and receive a control signal on the control channel based on the two or more activated beam configurations.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of a candidate beam configuration set for a control channel may include operations, features, components, or instructions for receiving signaling to configure a control channel for an SFN mode.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, signaling that configures a control channel for an SFN pattern configures the SFN pattern for one or more of a search space associated with the control channel or a bandwidth part (BWP) associated with the control channel.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving an indication of a candidate beam configuration set for a control channel can include an operation, feature, component, or instruction for receiving signaling that configures two or more downlink reference signals for a QCL type for a TCI state for the control channel.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, via signaling, an indication of two or more instances of QCL information for a QCL type, each instance of the QCL information being associated with a respective downlink reference signal of the two or more downlink reference signals.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving, via signaling, an indication that an instance of QCL information for a QCL type may be associated with two or more downlink reference signals.

[0016] In some examples of the methods, apparatus, and non-transitory 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.

[0017] In some examples of the methods, apparatus, 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 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.

[0018] In some examples of the methods, apparatus, 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.

[0019] In some examples of the methods, apparatus, 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 two or more of a set of candidate beam configurations for a control channel, the two or more of the set of candidate beam configurations including two or more activated beam configurations.

[0020] In some examples of the methods, apparatus, 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 two or more other beam configurations that are different from any one in a set of candidate beam configurations for a control channel, the two or more other beam configurations including the two or more activated beam configurations.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving the indication may include operations, features, components, or instructions for receiving a control resource set (CORESET) configuration indicating a set of candidate beam configurations for a control channel.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a CORESET configuration indicates that more than sixty-four TCI states may be configurable for a control channel.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a set of candidate beam configurations may be associated with an SFN state.

[0024] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an indication of a set of candidate beam configurations may be received in RRC (Random Access Controller) signaling.

[0025] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an indication to activate two or more beam configurations may be received in a medium access control (MAC) control element (CE).

[0026] A method of wireless communication at a base station is described. The method may include: sending an indication of a set of candidate beam configurations for a control channel to a UE, the control channel being associated with transmissions from two or more transmission resource planning (TRPs); determining two or more beam configurations to activate for the control channel based on the set of candidate beam configurations; sending an indication to activate the two or more beam configurations for the control channel; and sending a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs.

[0027] 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 are executable by the processor to cause the apparatus to: send an indication of a set of candidate beam configurations for a control channel to a UE, the control channel being associated with transmissions from two or more transmission resource planning (TRPs); determine two or more beam configurations to activate for the control channel based on the set of candidate beam configurations; send an indication to activate the two or more beam configurations for the control channel; and send a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs.

[0028] Another apparatus for wireless communication at a base station is described. The apparatus may include components for: sending an indication of a set of candidate beam configurations for a control channel to a UE, the control channel being associated with transmissions from two or more transmission resource planning (TRPs); determining two or more beam configurations to activate for the control channel based on the set of candidate beam configurations; sending an indication to activate the two or more beam configurations for the control channel; and sending a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs.

[0029] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to: send an indication of a set of candidate beam configurations for a control channel to a UE, the control channel being associated with transmissions from two or more transmission resource planning (TRPs); determine two or more beam configurations to activate for the control channel based on the set of candidate beam configurations; send an indication to activate the two or more beam configurations for the control channel; and send a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of a set of candidate beam configurations for a control channel may include operations, features, components, or instructions for sending signaling to configure a control channel for an SFN mode.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, signaling that configures a control channel for an SFN pattern configures the SFN pattern for one or more of a search space associated with the control channel or a BWP associated with the control channel.

[0032] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of a candidate beam configuration set for a control channel may include operations, features, components, or instructions for sending signaling to configure two or more downlink reference signals for a QCL type for a TCI state for the control channel.

[0033] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, via signaling, an indication of two or more instances of QCL information of a QCL type, each instance of the QCL information being associated with a respective downlink reference signal of the two or more downlink reference signals.

[0034] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending, via signaling, an indication that an instance of QCL information for a QCL type may be associated with two or more downlink reference signals.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending an indication of a candidate beam configuration set for a control channel may include operations, features, components, or instructions for sending 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.

[0036] In some examples of the methods, apparatus, 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 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.

[0037] In some examples of the methods, apparatus, 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.

[0038] In some examples of the methods, apparatus, 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 two or more in a set of candidate beam configurations for a control channel, the two or more in the set of candidate beam configurations including two or more activated beam configurations.

[0039] In some examples of the methods, apparatus, 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 two or more other beam configurations that are different from any one in a set of candidate beam configurations for a control channel, the two or more other beam configurations including the two or more activated beam configurations.

[0040] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending the indication may include operations, features, components, or instructions for sending a CORESET configuration indicating a set of candidate beam configurations for a control channel.

[0041] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a CORESET configuration indication may be for a control channel, and more than sixty-four TCI states may be configurable.

[0042] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a set of candidate beam configurations may be associated with an SFN state.

[0043] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an indication of the set of candidate beam configurations may be sent in RRC signaling.

[0044] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an indication to activate two or more beam configurations may be sent in a MAC CE. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 An example of a wireless communication system according to aspects of the present disclosure is shown.

[0046] Figure 2 An example of a wireless communication system according to aspects of the present disclosure is shown.

[0047] Figure 3A and Figure 3B Respective examples of signaling schemes according to aspects of the present disclosure are shown.

[0048] Figure 4 Examples of control information according to aspects of the present disclosure are shown.

[0049] Figure 5 An example of a process flow according to aspects of the present disclosure is shown.

[0050] Figure 6 and Figure 7 A block diagram of a device according to aspects of the present disclosure is shown.

[0051] Figure 8 A block diagram of a communications manager according to aspects of the present disclosure is shown.

[0052] Figure 9 A schematic diagram of a system including devices according to aspects of the present disclosure is shown.

[0053] Figure 10 and Figure 11 A block diagram of a device according to aspects of the present disclosure is shown.

[0054] Figure 12 A block diagram of a communications manager according to aspects of the present disclosure is shown.

[0055] Figure 13 A schematic diagram of a system including devices according to aspects of the present disclosure is shown.

[0056] Figures 14 to 17 A flow chart illustrating a method according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0057] For example, a user equipment (UE) and a base station may communicate via two or more transmit and receive points (TRPs) to improve communication quality, speed, or throughput. For example, the UE and the base station may communicate via a first TRP and a second TRP corresponding to the base station (e.g., when the UE 115 is located in a high-speed train (HST)). Although the examples described herein involve two TRPs, it will be understood that the same examples may also apply to any number of TRPs (e.g., more than two TRPs). In some cases, the first and second TRPs may concurrently or simultaneously send the same downlink signal to the UE using the same frequency. Such a downlink signal may be referred to as a single frequency network (SFN) signal, or a signal having an SFN pattern or operating according to the SFN pattern (e.g., an SFNed signal). In some cases, the UE may receive the SFN downlink signal as if the UE were receiving a single downlink signal (e.g., from the UE's perspective, the UE may not distinguish or may not be able to distinguish between an SFN signal received from one TRP (e.g., a downlink data signal of the SFN) and an SFN signal received from a second TRP (e.g., a downlink data signal of the corresponding SFN)). Although SFN mode is used herein, SFN mode may more generally refer to a mode of operation in which multiple TRPs provide transmissions (e.g., joint, concurrent, or simultaneous transmissions, etc.) on the same set of time and frequency resources. Thus, where "SFN mode" is used herein, other terms referring to equivalent technologies may be substituted.

[0058] The communication between the UE and the first and second TRPs may represent a multi-antenna transmission, where the first and second TRPs may send downlink information to the UE concurrently or simultaneously, for example, using an SFN pattern. In some cases, the SFN transmissions (e.g., control channel signals, shared channel signals, or both) from the first and second TRPs to the UE may represent a composite (also referred to as a combination, joint, etc.) channel, which may be estimated using quasi-co-location (QCL) state information or one or more other channel attributes, among other examples. As used herein, a QCL state may refer to one or more QCL relationships, and may also refer to or be referred to as a QCL pattern. In some cases, the first and second TRPs may 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 not aware of the SFN pattern, 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.

[0059] For example, if the UE is unaware of the SFN pattern, the UE may expect to receive one reference signal set for the channel, rather than two reference signal sets for the composite channel (e.g., one set for each TRP). If the UE is unaware of the SFN pattern, the UE may process communications based on one reference signal set, which may result in communication errors or reduced communication quality, speed, or throughput. Therefore, the present disclosure provides techniques for indicating the SFN pattern and composite channel reference signal to the UE.

[0060] For example, the base station may send a configuration associated with the control channel that indicates whether the control channel transmission is associated with an SFN mode, where the indication of the SFN mode may be explicit or implicit. In a first example, the SFN mode may be explicitly indicated in the configuration as enabled or disabled. The configuration may also configure a certain number of transmission configuration indicator (TCI) states for the control channel, which may be used to indicate the QCL information of the first and second TRPs, respectively. The base station may also send control signaling to indicate or activate the TCI state for each TRP communicating with the UE.

[0061] In a second example, the configuration may implicitly indicate the SFN pattern of the control channel. For example, the configuration may 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 may determine that the associated control channel transmission is SFN. To indicate multiple reference signals, the TCI state may be associated with multiple instances of QCL information, each of which may be associated with a reference signal, or the QCL type of the TCI state may be associated with one instance of QCL information, and the instance of QCL information may be associated with multiple reference signals. In some cases, the configuration may implicitly indicate the SFN pattern of the control channel transmission by indicating the SFN pattern of the shared channel transmission to the UE, where the UE may use the same configuration for the control channel transmission as for the shared channel transmission (e.g., the same TCI state, QCL state, or associated reference signals).

[0062] In the examples described herein, for example, based on an implicit or explicit indication in a configuration, a UE may determine that an SFN mode is enabled for a control channel transmission. The UE may receive one or more reference signals from each TRP and, based on the SFN indication, may determine that each of the one or more reference signals is associated with a control channel transmission (e.g., via a QCL state or relationship). The UE may use information (e.g., channel estimation information) from the one or more reference signals to receive a control channel transmission (e.g., a control signal on a control channel).

[0063] Various aspects of the present disclosure are initially described in the context of wireless communication systems. Various aspects of the present disclosure are further illustrated and described with reference to signaling schemes, control information, process flows, apparatus diagrams, system diagrams, and flowcharts related to beam configuration indication for downlink control channels.

[0064] Figure 1 An example of a wireless communication system 100 according to aspects of the present disclosure is 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.

[0065] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be devices of different forms or capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which a UE 115 and base station 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support communication of signals according to one or more radio access technologies.

[0066] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary, mobile, or both at different times. The UEs 115 may be devices of different forms or with different capabilities. Figure 1 Some example UEs 115 are shown in FIG. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relays, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 shown.

[0067] The base stations 105 can communicate with the core network 130, or with each other, or both. For example, the base stations 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other via the backhaul links 120 (e.g., via X2, Xn, or other interfaces) directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0068] The one or more base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next generation NodeB or a giga NodeB (any of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0069] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where a "device" may also be referred to as a unit, a station, a terminal, or a client, among other examples. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a 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.

[0070] The UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment, including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples. Figure 1 shown.

[0071] The UE 115 and the base station 105 can wirelessly communicate with each other via one or more communication links 125 over one or more carriers. The term "carrier" can refer to a set of radio spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier used for the communication link 125 can include a portion of a 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 can carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 can use carrier aggregation or multi-carrier operation to support communication with the UE 115. Depending on the carrier aggregation configuration, the UE 115 can 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.

[0072] The signal waveform transmitted on the carrier may be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may be composed of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may 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 received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate of the UE 115 may be. Wireless communication resources may refer to a combination of radio spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communications with the UE 115.

[0073] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, which can be, for example, The sampling period is seconds, where can indicate the maximum supported subcarrier spacing, and The maximum supported Discrete Fourier Transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0074] Each frame may include a plurality of 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 a plurality of 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 a plurality of symbol periods (e.g., depending on the length of a cyclic prefix prepended to each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of micro-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., ) sampling period. The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0075] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0076] Physical channels can be multiplexed on a carrier according to various techniques. For example, physical control channels and physical data channels can be multiplexed on a downlink carrier using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel can be defined by multiple symbol periods and can extend across the system bandwidth of a carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESETs) can be configured for a group of UEs 115. For example, one or more UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate can refer to a certain number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format with a given payload size. A search space set can include a common search space set configured for transmitting control information to multiple UEs 115, and a UE-specific search space set for transmitting control information to a specific UE 115.

[0077] In some examples, base stations 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0078] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication, and can be supported by one or more mission-critical services, such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVIDeo), or mission-critical data (MCData). Support for mission-critical functions can include service priorities, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably here.

[0079] In some examples, UE 115 can also communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 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 UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each 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 UEs 115 without involving base station 105.

[0080] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnections to external networks. The control plane entities may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management, for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be transferred via the user plane entities, which may provide IP address allocation and other functions. The user plane entities may connect to network operator IP services 150. Operator IP services 150 may include access to the Internet, intranet(s), IP multimedia subsystems (IMS), or packet-switched streaming services.

[0081] Some network devices, such as base stations 105, may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with the UE 115 through one or more other access network transmit entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transmit 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 consolidated into a single network device (e.g., base station 105).

[0082] The wireless communication system 100 can operate using one or more frequency bands typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Typically, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves can penetrate structures sufficient for a macrocell to provide service to a UE 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and a shorter range (e.g., less than 100 kilometers) than transmission in the high frequency (HF) or very high frequency (VHF) portion of the spectrum that uses smaller frequencies and longer wavelengths below 300 MHz.

[0083] The wireless communication system 100 can utilize licensed and unlicensed radio spectrum bands. For example, the wireless communication system 100 can employ license assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio spectrum band, devices such as the base station 105 and the UE 115 can employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band can be based on a carrier aggregation configuration in combination with component carriers operating in a licensed band (e.g., LAA). Operations in the unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

[0084] The 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) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (e.g., an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having multiple rows and columns of antenna ports that the base station 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0085] The base station 105 or UE 115 can use MIMO communication to take advantage of multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. This technology can be referred to as spatial multiplexing. For example, multiple signals can be sent by a transmitting device via different antennas or different antenna combinations. Similarly, multiple signals can be received by a receiving device via different antennas or different antenna combinations. 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 for channel measurement and reporting. MIMO technologies include single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0086] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals transmitted via antenna elements of an antenna array such that some signals propagating at a particular orientation with respect to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals transmitted via antenna elements may include the transmitting device or the receiving device applying an amplitude shift, a phase shift, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or the receiving device, or with respect to some other orientation).

[0087] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beam forming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beam forming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beam forming weights associated with different transmit directions. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device such as the base station 105, or by a receiving device such as the UE 115) a beam direction for later transmission or reception by the base station 105.

[0088] Some signals, such as data signals associated with a particular receiving device, may be transmitted by base station 105 in a single beam direction (e.g., a direction associated with a receiving device such as UE 115). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on 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 of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0089] In some examples, transmission by a device (e.g., base station 105 or UE 115) can be performed using multiple beam directions, and the device can 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 can report feedback indicating precoding weights for one or more beam directions, and the feedback can correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 can transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which can be precoded or unprecoded. UE 115 can provide feedback on beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent by base station 105 in one or more directions, UE 115 may employ similar techniques for sending signals multiple times in different directions (e.g., for identifying beam directions for subsequent transmission or reception by UE 115) or for sending signals in a single direction (e.g., for sending data to a receiving device).

[0090] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from the base station 105, a receiving device (e.g., UE 115) may try multiple reception configurations (e.g., directional listening). For example, the receiving device may try multiple reception directions (any of which may be referred to as "listening") by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array. In some examples, the receiving device may use a single reception configuration to receive along a single beam direction (e.g., when receiving data signals). The single reception configuration may be aligned on a beam direction determined based on listening according to different reception configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0091] The wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, communications 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 to communicate on logical channels. The media access control (MAC) layer can perform priority processing and multiplex logical channels into transport channels. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission 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 an RRC connection between the UE 115 and the base station 105 or the core network 130 for the radio bearer supporting user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0092] In some cases, one or more TCI states may be configured and activated for the UE 115 for downlink transmissions (e.g., downlink shared channel transmissions or downlink control channel transmissions) from the base station 105. For example, one or more TCI states may be configured via RRC signaling, where up to 64 TCI states may be configured for the control channel and up to 128 TCI states may be configured for the shared channel. A MAC control element (CE) and DCI may be sent to the UE to activate the TCI state for the shared channel, and a MAC CE may be sent to the UE to activate the TCI state for the control channel. The TCI state may include parameters for configuring a QCL relationship between one or two downlink reference signals and a DMRS port of a shared channel, a control channel, or a CSI-RS resource. The TCI state may indicate a QCL relationship for a first downlink reference signal (e.g., QCL Type-1) and a QCL relationship for a second downlink reference signal (e.g., QCL Type-2), such that up to two QCL relationships may be configured for the TCI state.

[0093] In some cases, the UE 115 may be configured with one TCI state for the CORESET of the control channel, such that the UE 115 may assume that the QCL relationship between the control channel and the downlink reference signal(s) is specified by the TCI state. In this case, the UE 115 may identify the active TCI state with or without activation from a MAC CE. In some other cases, multiple TCI states may be configured for the CORESET, such that a MAC CE may be used to activate the TCI state for the control channel and identify the TCI state of the UE 115 to apply to transmissions on the control channel. In some cases, the UE 115 may not receive a MAC CE and may be configured with multiple TCI states. In this case, the UE 115 may assume the QCL relationship of the control channel and the downlink reference signal(s) selected during the initial access procedure (e.g., a default TCI based on beam scanning).

[0094] For example, the UE 115 and the base station 105 may communicate via two or more TRPs to improve communication quality, speed, or throughput via SFN transmissions. The base station 105 may send a configuration associated with a control channel that indicates whether the control channel transmission is associated with an SFN pattern, where the indication of the SFN pattern may be explicit or implicit. The UE 115 may receive one or more reference signals from each TRP and, based on the SFN indication, may determine that each of the one or more reference signals is associated with a control channel transmission (e.g., via a QCL state or relationship). The UE 115 may use information from the one or more reference signals (e.g., channel estimation information) to receive the control channel transmission (e.g., a control signal on the control channel).

[0095] Figure 2 An example of a wireless communication system 200 according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the wireless communication system 200 can include a UE 115-a and a base station 105 (not shown), which can be reference Figure 1 The wireless communication system 200 may also include two or more TRPs 210, wherein the UE 115-a may communicate with the base station 105 via at least two or more TRPs 210. For example, the wireless communication system 200 may include a TRP 210-a and a TRP 210-b, which may correspond to the base station 105. Although the examples described herein relate to two TRPs 210, it will be understood that the same examples may also apply to any number of TRPs 210 (e.g., more than two TRPs 210).

[0096] UE 115-a may estimate properties of a channel (e.g., a shared channel or a control channel) used for transmissions from TRPs 210-a and 210-b based on one or more reference signals sent on the channel. Channel properties may include phase variation, frequency offset, channel synchronization, interference characteristics, or channel distortion, among other examples. Channel estimation (e.g., channel property estimation) may support reception of downlink transmissions, among other examples. The QCL state may support channel estimation at UE 115-a by indicating a relationship between different channels associated with different downlink transmissions received at different antenna ports. For example, the QCL state may indicate a relationship between a reference signal and a corresponding antenna port of a control channel or shared channel (e.g., or a reference signal thereof). UE 115-a may determine a channel property for a first antenna port (e.g., of a reference signal) and apply the channel property to a second antenna port (e.g., of a shared or control channel).

[0097] In some cases, the QCL state may indicate one or more reference signals (e.g., reference signal ports) that may be used for channel estimation for one or more antenna ports of a downlink channel. For example, the base station 105 may configure the UE 115-a with a QCL state indicating that one or more antenna ports used for downlink reference signals (e.g., synchronization signal blocks (SSBs) or CSI-RS) are QCLed (e.g., share one or more channel attributes) with one or more antenna ports of a downlink channel (e.g., a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), or CSI-RS). The UE 115-a may receive QCL information from the base station 105 via a configuration indicating the QCL state (e.g., a TCI state configuration).

[0098] The QCL information may indicate a relationship between antenna ports, and a QCL type associated with the QCL relationship. A QCL relationship, pattern, or type may 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 may indicate a relationship between two signals for Doppler shift, Doppler spread, and average delay, such as QCL-TypeA (e.g., associating channel properties including Doppler shift, Doppler spread, average delay, and delay spread). In another example, a second QCL relationship, pattern, or type may indicate a relationship between two signals for Doppler shift and Doppler spread, such as QCL-TypeB (e.g., associating channel properties including Doppler shift and Doppler spread). In another example, a third QCL relationship, pattern, or type may indicate a relationship between two signals for average delay and Doppler spread, such as QCL-TypeC (e.g., associating channel properties including Doppler shift and average delay). In another example, a fourth QCL relationship, mode, or type may indicate a relationship between two signals for one or more spatial reception parameters, such as QCL-Type D (eg, associating channel properties including one or more spatial reception parameters).

[0099] In some multi-TRP deployments, two or more TRPs 210 may 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 of the TRPs 210 may concurrently or simultaneously send the same downlink signal (e.g., a joint SFN downlink signal) to UE 115-a using the same frequency. Such a downlink signal may be referred to as an SFNed 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 SFNed 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 may receive the SFN's downlink signal as if UE 115-a were receiving a single downlink signal.

[0100] In some cases, TRPs 210-a and 210-b may send independent reference signals (e.g., for independent channel estimation) to UE 115-a, and UE 115-a may use the independent reference signals to perform channel estimation for antenna ports that are QCLed with the independent reference signal ports. For example, UE 115-a may use the independent reference signals to receive or decode downlink signals for SFN using antenna ports that are QCLed with the independent reference signal antenna ports. For example, DMRS ports corresponding to SFN transmissions on a shared channel or control channel may be QCLed (e.g., associated) with one or more antenna ports for a reference signal (e.g., SSB or CSI-RS). UE 115-a may use information from the one or more antenna ports of the reference signal to support channel estimation for the SFN transmission.

[0101] Although the techniques described herein may be applied to high-speed scenarios, such as HST-SFN scenarios, these techniques may also be used for any type of communication link in which a UE 115 communicates with multiple TRPs 210 using an SFN pattern or a similar communication pattern. In one example, an HST wireless network may include a set of TRPs 210 spaced apart along a high-speed railway, where a UE 115-a may communicate with a certain number (e.g., two) of the TRPs 210 (e.g., TRPs 210-a and 210-b) in the set of TRPs 210 in the downlink and / or uplink.

[0102] Communications between UE 115-a and TRPs 210-a and 210-b may represent multi-antenna transmissions, where TRPs 210-a and 210-b may concurrently or simultaneously transmit downlink information to UE 115-a, for example, using an SFN pattern. In some cases, TRPs 210-a and 210-b may be transparent to UE 115-a, such that UE 115-a may not be aware of which TRP 210 the transmission is from, or that the transmission is from both TRPs 210. In some cases, transmissions from TRPs 210-a and 210-b to UE 115-a's SFN (e.g., control channel signals, shared channel signals, or both) may represent a composite channel, which may be estimated using QCL state information or one or more other channel attributes, among other examples.

[0103] In some cases, the SFN pattern may be transparent to UE 115-a, such that UE 115-a may not be aware that the downlink signal corresponds to a signal of the SFN. However, in some cases, TRPs 210-a and 210-b may be associated with different downlink channel properties (e.g., spatial or other transmission properties, such as different QCL states), such that if UE 115-a is unaware of the SFN pattern, UE 115-a may not be able 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 pattern, UE 115-a 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 pattern, UE 115-a may process communications based on one reference signal set, which may result in communication errors or reduced communication quality, speed, or throughput. Thus, the present disclosure provides techniques for indicating an SFN pattern and a composite channel reference signal to a UE 115 (eg, UE 115 - a ).

[0104] For example, the base station 105 may transmit a configuration 215 (e.g., an RRC configuration) for one or more of a BWP, a CORESET, or a search space for a control channel transmission 225. The configuration 215 may be transmitted via a TRP 210-a, a TRP 210-b, another TRP 210, or any combination thereof. The configuration 215 may indicate whether the control channel transmission 225 associated with the configured BWP, CORESET, or search space is associated with an SFN pattern, where the indication of the SFN pattern may be explicit or implicit. For example, in the configuration 215 (e.g., in the CORESET configuration), the SFN pattern may be explicitly indicated as enabled or disabled. The configuration 215 may also configure multiple TCI states for the BWP, CORESET, or search space. In some cases, the configuration 215 may support configuring up to 64 TCI states, and in some cases, the configuration 215 may support configuring more than 64 TCI states. In some cases, two configured TCI states or two other TCI states may be used to indicate QCL information for two TRPs 210, respectively. For example, control signaling 220 (e.g., MAC CE) from base station 105 may indicate or activate the TCI state for each TRP 210 (e.g., TRPs 210-a and 210-b) communicating with UE 115-a. Control signaling 220 may be sent via TRP 210-a, TRP 210-b, another TRP 210, or any combination thereof.

[0105] In some cases, the configuration 215 may implicitly indicate an SFN mode for the control channel transmission 225. For example, the configuration 215 may configure a TCI state for the control channel transmission 225 (e.g., for an associated CORESET) such that the TCI state indicates two or more types of reference signals for a QCL type or state. If the UE 115-a receives the configuration 215 indicating multiple reference signals for a TCI state or QCL type, the UE 115-a may determine that the associated control channel transmission 225 is SFN.

[0106] In a 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 the QCL information can be associated with a reference signal. In some cases, each instance of the QCL information can also be associated with a TRP 210 in a plurality of TRPs 210 (e.g., TRP 210-a or 210-b) serving UE 115-a. In a second example, the QCL type of the TCI state can be associated with one instance of QCL information, and the instance of the QCL information can be associated with two or more reference signals. In some cases, each reference signal can be associated with a TRP 210 in a plurality of TRPs 210 (e.g., TRP 210-a or 210-b) serving UE 115-a.

[0107] In some cases, the configuration may implicitly indicate the SFN pattern for the control channel transmission 225 by indicating the SFN pattern for the shared channel transmission to the UE 115-a. The base station 105 may configure the UE 115-a to use the same configuration for the control channel transmission 225 as for the shared channel transmission (e.g., the same TCI state, QCL state, or associated reference signal).

[0108] In any of the examples described herein, for example, based on an implicit or explicit indication in the configuration 215, the UE 115-a may determine that an SFN mode is enabled for the control channel transmission 225. The 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 the control channel transmission 225 (e.g., via a QCL state or relationship). The UE 115-a may use information (e.g., channel estimation information) from the one or more reference signals to receive the control channel transmission 225 (e.g., a control signal on a control channel).

[0109] Figure 3A and Figure 3B1 and 2. In some examples, the signaling schemes 301 and 302 may implement aspects of the wireless communication system 100 or 200. For example, the signaling schemes 301 and 302 may be implemented by the UE 115 (not shown) and the base station 105 (not shown), which may be reference signals. Figure 1 and Figure 2 1 and 2. The example of the UE 115 and the base station 105 described herein. The signaling schemes 301 and 302 may also be implemented by two or more TRPs, where the UE 115-a may communicate with the base station 105 via the two or more TRPs. For example, the signaling schemes 301 and 302 may be implemented by two TRPs (not shown) that may correspond to the base station 105. Although the examples described herein involve two TRPs, it will be understood that the same examples may also be applied to any number of TRPs (e.g., more than two TRPs).

[0110] In some cases, the reference signal 310 (e.g., tracking reference signal (TRS), CSI-RS, or CRS) and SSB 305 may be sent separately or independently from each TRP. Figure 3A In the example shown, the first TRP may transmit SSB 305-a to UE 115, and the second TRP may independently transmit SSB 305-b to UE 115. Similarly, the first TRP may transmit reference signal 310-a to UE 115, and the second TRP may independently transmit reference signal 310-b to UE 115. Figure 3B In the example shown, a first TRP may transmit an SSB 305-c to a UE 115, and a second TRP may independently transmit an SSB 305-d to the UE 115. Similarly, a first TRP may transmit a reference signal 310-c to the UE 115, and a second TRP may independently transmit a reference signal 310-d to the UE 115. The UE 115 may be configured with multiple QCL states (e.g., reference signal relationships), where each QCL state may be associated with a reference signal 310 of one of the TRPs. For example, the UE 115 may be configured with multiple TCI states (e.g., one TCI state for each TRP), where each TCI state may include QCL state information for a reference signal 310 of one of the TRPs.

[0111] As reference Figure 2As described, the UE 115 may receive a configuration indicating that a downlink channel transmission 315 (e.g., a control channel transmission) is associated with an SFN pattern. For example, the SFN pattern may represent a state in which the UE receives transmissions from two or more TRPs, where each TRP may be associated with a different reference signal QCL relationship for the downlink channel transmission 315. In such a configuration, the UE 115 may independently estimate a Doppler profile and other channel characteristics for each TRP. Because the channel characteristics may be estimated independently for each TRP, the downlink channel transmission 315 may support improved channel estimation performance, e.g., compared to a configuration in which the UE 115 may not be aware of the SFN pattern. For example, a DMRS for the downlink channel transmission 315 may be associated with multiple CSI-RSs (e.g., one or more CSI-RSs for each TRP), which may improve channel estimation performance (e.g., because the transmission from each TRP may be associated with different channel characteristics and different corresponding reference signal characteristics).

[0112] In some examples, the signaling scheme 301 can represent a scheme for associating a downlink channel transmission 315-a (e.g., a control channel transmission) with reference signals 310-a and 310-b from two corresponding TRPs, wherein one DMRS port of the downlink channel transmission 315-a can share a QCL relationship (e.g., can be QCL) with the reference signals 310-a and 310-b. Based on the QCL relationship with both reference signals 310-a and 310-b, the DMRS of the downlink channel transmission 315-a can be dependent. Therefore, the signaling scheme 301 can support composite channel estimation using one DMRS port, which can reduce DMRS overhead. In one example, each DMRS port of the downlink channel transmission 315-a can be associated with two TCI states (e.g., one TCI state for each TRP), and each TCI state can include or indicate corresponding QCL state information.

[0113] In some examples, the signaling scheme 302 can represent a scheme for associating a downlink channel transmission 315-b (e.g., a control channel transmission) with reference signals 310-c and 310-d from two corresponding TRPs, wherein multiple DMRS ports of the downlink channel transmission 315-b can share a QCL relationship (e.g., can be QCL) with reference signal 310-a or 310-b. Based on the QCL relationship, the DMRS of the downlink channel transmission 315-a can be independent. Thus, the signaling scheme 302 can support composite channel estimation using multiple DMRS ports. In one example, the reference signal 310-c can be associated with a first DMRS port group (DMRS port group 320-a), and the reference signal 310-d can 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 one port in the DMRS port group 320-a and one port in the DMRS port group 320-b.

[0114] In some cases, the reference signal 310 represented by the signaling scheme 301 or 302 may be associated with one TCI state instead of two TCI states. Figure 2 As described above, one TCI state may indicate a relationship between a QCL type and two or more reference signals 310. For example, the TCI state may indicate a relationship between a QCL type and reference signals 310-a and 310-b or a relationship between a QCL type and reference signals 310-c and 310-d.

[0115] In a first example of a TCI state, the TCI state may indicate a QCL relationship by supporting multiple instances of QCL information for one QCL type. For example, the TCI state may indicate a TCI state identifier (ID), a first QCL type, and a second optional QCL type. The first QCL type and the second QCL type may each be configured to be associated with multiple corresponding instances of QCL information, for example, up to the number of TRPs communicated with the UE 115 via the SFN pattern. Each instance of QCL information may 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 may also indicate whether the QCL state is associated with a QCL type (e.g., QCL Type-A, QCL Type-B, QCL Type-C, or QCL Type-D). In some cases, an instance of QCL information may indicate a serving cell index or BWP ID associated with the QCL information.

[0116] In a second example of a TCI state, the TCI state may indicate a relationship between a QCL type and multiple reference signals 310 by supporting multiple reference signals 310 for QCL information of the QCL type. The TCI state may indicate a TCI state identifier (ID), a first QCL type, and a second optional QCL type, wherein each QCL type may be associated with corresponding QCL information (e.g., an instance of the QCL information). The QCL information may be associated with multiple reference signals 310 (e.g., SSBs or CSI-RSs), for example, up to the number of TRPs communicated with the UE 115 via the SFN pattern. Each reference signal 310 may be indicated via a corresponding reference signal resource ID (e.g., a CSI-RS resource ID) or index (e.g., an SSB index). The QCL information may 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 may indicate a serving cell index or BWP ID associated with the QCL information.

[0117] In any of the examples described herein, the UE 115 can receive one or more reference signals 310 from each TRP and, based on the SFN indication, can determine that each of the one or more reference signals 310 is associated with a downlink channel transmission 315 (e.g., via a QCL state or relationship). The UE 115 can use information (e.g., channel estimation information) from the one or more reference signals 310 to receive the downlink channel transmission 315 (e.g., a control signal on a control channel).

[0118] Figure 4 An example of control information 400 according to aspects of the present disclosure is shown. In some examples, the control information 400 can implement aspects of the wireless communication system 100 or 200. For example, the control information 400 can be used by the UE 115 (not shown) and the base station 105 (not shown), which can be referenced. Figure 1 3 illustrates an example of a UE 115 and a base station 105. The control information 400 may also be used or sent by two or more TRPs, where the UE 115 may communicate with the base station 105 via two or more TRPs. For example, the control information 400 may be used by two TRPs (not shown), which may correspond to the base station 105. Although the examples described herein relate to two TRPs, it will be understood that the same examples may also be applied to any number of TRPs (e.g., more than two TRPs).

[0119] As reference Figure 2As described, the two TRPs may send one or more downlink signals (e.g., downlink control signals on a control channel) using an SFN pattern. In some cases, the SFN pattern may be explicitly or implicitly indicated by a configuration sent by the base station 105 to the UE 115. The configuration may also configure multiple groups of TCI states for the UE 115 (e.g., for a control channel), where two of the configured TCI states or two other TCI states may be used to indicate QCL information for each of the two TRPs, respectively. For example, control signaling (e.g., MAC CE) from the base station 105 may indicate or activate the TCI state of each TRP communicating with the UE 115. The control signaling may include an example of the control information 400.

[0120] For example, the control signaling may include an indication of a serving cell ID 405 associated with the control channel and one or more instances of a coreset ID 410 associated with the control channel. The control signaling may also activate multiple TCI states, e.g., one TCI state for each TRP communicating with the UE 115 in the SFN mode for the control channel. In one example, the control signaling may indicate a TCI state ID 415-a for a first TRP communicating with the UE 115 and a TCI state ID 415-b for a second TRP communicating with the 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 may be represented by four bits, and each TCI state ID 415 may be represented by seven bits, respectively. In some cases, the control signaling may also indicate the TRP associated with each corresponding TCI state ID 415, for example, using bits associated with the TCI state ID 415 or using other bits.

[0121] In a first example, the configuration from the base station may configure two TCI states for the UE 115, and the UE 115 may determine that each of the two TCI states corresponds to a corresponding TRP and may activate or use the two TCI states for SFN communication. For example, the control signaling may indicate a TCI state ID 415 for each of the corresponding TCI states. Additionally or alternatively, the UE 115 may determine that the number of configured TCI states is equal to the number of TRPs communicating with the UE 115 in SFN mode, based on which the UE 115 may further determine that each of the two TCI states corresponds to a corresponding TRP (e.g., where the association between the TCI state and the TRP may be indicated via control signaling).

[0122] In a second example, the configuration may configure one TCI state for the UE 115. In some cases, control signaling may indicate (e.g., activate) the configured TCI state via a first TCI state ID 415 (e.g., TCI state ID 415-a), and may 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 by configuration from the base station 105. In some cases, control signaling may indicate or activate two TCI states via the TCI state ID 415, where the two activated TCI states may not include the configured TCI state. As described herein, the UE 115 may activate or use the two indicated TCI states 415 for SFN communication.

[0123] In a third example, the configuration may configure more than two TCI states for the UE 115, and the control signaling may indicate or activate two of the configured TCI states (e.g., via the TCI state ID 415). If the control signaling fails to indicate or activate both of the configured TCI states (e.g., activates one of the TCI states), the control signaling may trigger an error condition at the UE 115, and in some cases, the UE 115 may report the error condition to the base station 105. If the control signaling indicates or activates both of the configured TCI states, the UE 115 may activate or use both indicated TCI states 415 for SFN communications as described herein.

[0124] Figure 5 An example of a process flow 500 according to aspects of the present disclosure is shown. In some examples, the process flow 500 can implement aspects of the wireless communication system 100 or 200. The process flow 500 can include or be implemented by the base station 105-a and the UE 115-b, which can be reference Figure 1-Figure 4 An example of a base station 105 and a UE 115 is described. Process flow 500 may illustrate an example in which a UE 115-b may be informed of an SFN pattern for downlink signals and may activate two or more beam configurations for receiving downlink signals (e.g., control signals) from base station 105-a. As described herein, the control signals may 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.

[0125] At 505, base station 105-a may send an indication of multiple candidate beam configurations for a control channel (e.g., an indication of an SFN pattern) to UE 115-b, where the control channel may be associated with control signal transmission via two or more TRPs. In some examples, the indication of the multiple candidate beam configurations may include, or be included in, an RRC message or RRC configuration. For example, the RRC configuration may include an explicit indication of an SFN pattern for control channel transmission via two or more TRPs (e.g., configured via a CORESET).

[0126] In some cases, the RRC configuration may exclude explicit indication of the SFN mode and may include an implicit indication of the SFN mode, for example, via an indication of multiple reference signals associated with the TCI state indicated in the RRC configuration (e.g., indicated via QCL information for the TCI state). In some cases, the QCL type for 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 the QCL information may be associated with a reference signal. In some cases, the QCL information for the QCL type for 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).

[0127] At 510, the base station 105-a may determine two or more beam configurations to activate for a control channel based on a plurality of candidate beam configurations. For example, the base station 105-a may identify two or more TRPs associated with a control channel transmission (e.g., a control signal transmission) to the UE 115-b and may activate the two or more beam configurations based on identifying the two or more TRPs. In some cases, each of the two or more activated beam configurations may correspond to a TRP in the two or more TRPs. In some cases, determining the beam configuration corresponding to a TRP in the two or more TRPs may be based on one or more channel or spatial characteristics associated with the TRP.

[0128] At 515, the base station 105-a may send an indication to the UE 115-b to activate two or more beam configurations for a control channel. In some examples, the indication to activate two or more beam configurations may be received via control signaling (e.g., via a MAC CE). Figure 4As described, a first example of an indication to activate two or more beam configurations may include an indication to 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 the base station 105-a may send an indication to activate the plurality of TCI states. In a second example, the indication to activate two or more beam configurations may instruct UE 115-b to activate one of the 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 the base station 105-a may send an indication to activate one of the plurality of TCI states and one additional TCI state.

[0129] In a third example, the indication to activate two or more beam configurations may instruct UE 115-b to activate two or more other beam configurations that are different from the multiple candidate beam configurations. For example, the multiple candidate beam configurations may represent multiple TCI states (e.g., two TCI states), and the base station 105-a may send an indication to activate two or more TCI states that are not included in the multiple TCI states. In a fourth example, the indication to activate two or more beam configurations may instruct UE 115-b to activate two or more other configurations in the multiple candidate beam configurations. For example, the multiple candidate beam configurations may represent multiple TCI states (e.g., two TCI states), and the base station 105-a may send an indication to activate two or more TCI states in the multiple TCI states.

[0130] At 520, the base station 105-a may send a control signal to the UE 115-b on a control channel based on the two or more activated beam configurations, and the UE 115-b may receive the control signal on the control channel based on the two or more activated beam configurations. In some cases, the base station 105-a may send the control signal via two or more TRPs. For example, the base station 105-a may send the control signal via the PDCCH based on two or more activated beam configurations associated with the two or more TRPs. In some cases, the base station 105-a may send the control signal via a TRP in the two or more TRPs based on the beam configuration (e.g., TCI state or QCL state) associated with the TRP, and the UE 115-b may receive the control signal from the TRP using the beam configuration (e.g., TCI state or QCL state) associated with the TRP (e.g., associated with one or more reference signals of the TRP).

[0131] Figure 6A block diagram 600 of a device 605 according to aspects of the present disclosure is shown. The device 605 can be an example of aspects of the UE 115 as described herein. The device 605 can include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0132] The receiver 610 may receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indications for downlink control channels, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 605. The receiver 610 may be a reference Figure 9 Examples of aspects of the transceiver 920 are described. The receiver 610 may utilize a single antenna or a group of antennas.

[0133] The communication manager 615 may receive an indication of a candidate beam configuration set for a control channel from a base station, the control channel being associated with transmission via two or more TRPs; receive an indication to activate two or more beam configurations based on the candidate beam configuration set for the control channel; and receive a control signal on the control channel based on the two or more activated beam configurations. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

[0134] The communication manager 615 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 615 or its subcomponents may be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functionality described in this disclosure.

[0135] The communication manager 615 or its subcomponents can be physically located in various locations, including being distributed so that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or combinations thereof).

[0136] The transmitter 620 can transmit signals generated by other components of the device 605. In some examples, the transmitter 620 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 620 can be a reference Figure 9 Examples of aspects of the transceiver 920 are described. The transmitter 620 may utilize a single antenna or a group of antennas.

[0137] The actions performed by the communication manager 615 described herein, as well as 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 a wireless device (e.g., UE 115) by supporting reference signals for identifying multiple TRPs in an SFN pattern. Recognition of SFN patterns can reduce latency, interference, and power consumption (or any combination thereof) compared to other systems and techniques that do not, for example, support recognition of SFN patterns for transmissions involving multiple TRPs. Thus, the communication manager 615 can save power and increase battery life at a wireless device (e.g., UE 115) by strategically improving communication quality at the wireless device (e.g., UE 115).

[0138] Figure 7 A block diagram 700 of a device 705 according to aspects of the present disclosure is shown. The device 705 can be an example of aspects of the device 605 or UE 115 as described herein. The device 705 can include a receiver 710, a communication manager 715, and a transmitter 735. The device 705 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0139] The receiver 710 may receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indications for downlink control channels, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 705. The receiver 710 may be a reference Figure 9 Examples of aspects of the transceiver 920 are described. The receiver 710 may utilize a single antenna or a group of antennas.

[0140] Communications manager 715 may be an example of aspects of communications manager 615 as described herein. Communications manager 715 may include a configuration receiving component 720, an activation receiving component 725, and a control signal receiving component 730. Communications manager 715 may be an example of aspects of communications manager 910 as described herein.

[0141] Configuration receiving component 720 can receive, from a base station, an indication of a set of candidate beam configurations for a control channel associated with transmission via two or more TRPs.

[0142] The activation receiving component 725 can receive an indication to activate two or more beam configurations based on the candidate beam configuration set for a control channel.

[0143] The control signal receiving component 730 can receive a control signal on a control channel according to two or more activated beam configurations.

[0144] The transmitter 735 can transmit signals generated by other components of the device 705. In some examples, the transmitter 735 can be co-located with the receiver 710 in a transceiver module. For example, the transmitter 735 can be a reference Figure 9 Examples of aspects of the transceiver 920 are described. The transmitter 735 may utilize a single antenna or a group of antennas.

[0145] A processor of a wireless device (e.g., as referenced Figure 9 As described above, controlling the 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, which can reduce power consumption (e.g., by implementing reference) compared to other systems and technologies that do not support the indication of SFN mode (which may increase interference and power consumption). Figure 8 described system components). In addition, the processor of the UE 115 can identify one or more aspects of the SFN pattern indication and the multiple reference signals associated with the SFN pattern to perform the processes described herein. The processor of the wireless device can use the indication of the SFN pattern and the multiple reference signals to perform one or more actions that can result in lower interference and power consumption, as well as saving power and increasing battery life at the wireless device (e.g., by strategically increasing communication quality and throughput), among other benefits.

[0146] Figure 8 A block diagram 800 of a communication manager 805 is shown in accordance with aspects of the present disclosure. The communication manager 805 can be an example of aspects of the communication manager 615, the communication manager 715, or the communication manager 910 described herein. The communication manager 805 can include a configuration receiving component 810, an activation receiving component 815, and a control signal receiving component 820. Each of these modules can communicate with each other, directly or indirectly (e.g., via one or more buses).

[0147] The configuration receiving component 810 can receive an indication of a set of candidate beam configurations for a control channel from a base station, the control channel being associated with transmission via two or more TRPs. In some examples, the configuration receiving component 810 can receive signaling configuring the control channel for an SFN pattern.

[0148] In some examples, configuration receiving component 810 may receive signaling that configures two or more downlink reference signals for a QCL type for a TCI state of a control channel. In some examples, configuration receiving component 810 may receive, via signaling, an indication of two or more instances of QCL information for the QCL type, each instance of the QCL information being associated with a respective downlink reference signal of the two or more downlink reference signals. In some examples, configuration receiving component 810 may receive, via signaling, an indication that an instance of QCL information for the QCL type is associated with two or more downlink reference signals.

[0149] In some examples, configuration receiving component 810 can 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, configuration receiving component 810 can receive a CORESET configuration indicating a candidate beam configuration set for the control channel.

[0150] In some cases, signaling configuring a control channel for an SFN pattern configures the SFN pattern for one or more of a search space associated with the control channel or a BWP associated with the control channel. In some cases, the CORESET configuration indicates that more than 64 TCI states are configurable for the control channel. In some cases, a candidate beam configuration set is associated with an SFN state. In some cases, an indication of the candidate beam configuration set is received in RRC signaling.

[0151] The activation receiving component 815 may receive an indication to activate two or more beam configurations based on a candidate beam configuration set for a control channel. In some examples, the activation receiving component 815 may receive an indication to activate each of the candidate beam configuration set for the control channel, wherein the candidate beam configuration set includes two or more activated beam configurations. In some examples, the activation receiving component 815 may receive an indication to activate one of the candidate beam configuration set for the control channel and one or more other beam configurations.

[0152] In some examples, the activation receiving component 815 can receive an indication to activate two or more of a set of candidate beam configurations for a control channel, the two or more of the set of candidate beam configurations including the two or more activated beam configurations. In some examples, the activation receiving component 815 can receive an indication to activate two or more other beam configurations different from any of the set of candidate beam configurations for the control channel, the two or more other beam configurations including the two or more activated beam configurations. In some cases, the indication to activate the two or more beam configurations is received in a MAC CE.

[0153] The control signal receiving component 820 can receive a control signal on a control channel according to two or more activated beam configurations.

[0154] Figure 9 905 , according to aspects of the present disclosure. Device 905 may be an example of, or include components of, device 605, device 705, or UE 115 as described herein. Device 905 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications 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).

[0155] The communication manager 910 can receive an indication of a candidate beam configuration set for a control channel from a base station, the control channel being associated with transmission via two or more TRPs; receive an indication of activating two or more beam configurations based on the candidate beam configuration set for the control channel, and receive a control signal on the control channel based on the two or more activated beam configurations.

[0156] The I / O controller 915 can manage the input and output signals to the device 905. The I / O controller 915 can also manage peripheral devices that are 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 iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX® or other known operating systems. In other cases, the I / O controller 915 can represent a modem, keyboard, mouse, touch screen or similar device, or interact with it. In some cases, the I / O controller 915 can be implemented as a part of a processor. In some cases, a user can interact with the device 905 via the I / O controller 915 or via the hardware components controlled by the I / O controller 915.

[0157] As described above, the transceiver 920 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 920 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 920 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, as well as demodulate packets received from the antenna.

[0158] In some cases, a wireless device may include a single antenna 925. However, in some cases, a device may have more than one antenna 925, which may be capable of concurrently sending or receiving multiple wireless transmissions.

[0159] The memory 930 may include random access memory (RAM) and read-only memory (ROM). The memory 930 may store computer-readable, computer-executable code 935, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 930 may include a basic I / O system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0160] The processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting beam configuration indication for a downlink control channel).

[0161] The code 935 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 935 may be stored in a non-transitory computer-readable medium (such as system memory or other types of memory). In some cases, the code 935 may not be directly executed by the processor 940, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0162] Figure 10 A block diagram 1000 of a device 1005 according to aspects of the present disclosure is shown. The device 1005 can be an example of aspects of the base station 105 as described herein. The device 1005 can include a receiver 1010, a communication manager 1015, and a transmitter 1020. The device 1005 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0163] The receiver 1010 may receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indications for downlink control channels, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1005. The receiver 1010 may be a reference Figure 13Examples of aspects of the transceiver 1320 are described. The receiver 1010 may utilize a single antenna or a group of antennas.

[0164] The communication manager 1015 may send an indication of a set of candidate beam configurations for a control channel to the UE, the control channel being associated with transmissions from two or more TRPs; determine two or more beam configurations to activate for the control channel based on the set of candidate beam configurations; send an indication to activate the two or more beam configurations for the control channel; and send a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs. The communication manager 1015 may be an example of aspects of the communication manager 1310 described herein.

[0165] The communication manager 1015 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 1015 or its subcomponents may be performed by a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0166] The communication manager 1015 or its subcomponents can be physically located in various locations, including being distributed so that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can 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 the present disclosure, or a combination thereof).

[0167] Transmitter 1020 can transmit signals generated by other components of device 1005. In some examples, transmitter 1020 can be co-located with receiver 1010 in a transceiver module. For example, transmitter 1020 can be a reference Figure 13 Examples of aspects of the transceiver 1320 are described. The transmitter 1020 may utilize a single antenna or a group of antennas.

[0168] Figure 11 A block diagram 1100 of a device 1105 according to aspects of the present disclosure is shown. The device 1105 can be an example of aspects of the device 1005 or base station 105 as described herein. The device 1105 can include a receiver 1110, a communication manager 1115, and a transmitter 1140. The device 1105 can also include a processor. Each of these components can communicate with each other (e.g., via one or more buses).

[0169] The receiver 1110 may receive information associated with various information channels (e.g., control channels, data channels, and information related to beam configuration indications for downlink control channels, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1105. The receiver 1110 may be a reference Figure 13 Examples of aspects of the transceiver 1320 are described. The receiver 1110 may utilize a single antenna or a group of antennas.

[0170] The communication manager 1115 can be an example of aspects of the communication manager 1015 as described herein. The communication manager 1115 can include a configuration transmission component 1120, a beam configuration determination component 1125, an activation transmission component 1130, and a control signal transmission component 1135. The communication manager 1115 can be an example of aspects of the communication manager 1310 as described herein.

[0171] Configuration transmission component 1120 can transmit to the UE an indication of a set of candidate beam configurations for a control channel associated with transmissions from two or more TRPs. Beam configuration determination component 1125 can determine two or more beam configurations to activate for the control channel based on the set of candidate beam configurations.

[0172] The activation transmission component 1130 can transmit an indication to activate two or more beam configurations for a control channel. The control signal transmission component 1135 can transmit a control signal on the control channel based on the two or more activated beam configurations via two or more TRPs.

[0173] Transmitter 1140 can transmit signals generated by other components of device 1105. In some examples, transmitter 1140 can be co-located with receiver 1110 in a transceiver module. For example, transmitter 1140 can be a reference Figure 13 Examples of aspects of the transceiver 1320 are described. The transmitter 1140 may utilize a single antenna or a group of antennas.

[0174] Figure 12 A block diagram 1200 of a communication manager 1205 is shown in accordance with aspects of the present disclosure. The communication manager 1205 can be an example of aspects of the communication manager 1015, the communication manager 1115, or the communication manager 1310 described herein. The communication manager 1205 can 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 can communicate with each other, directly or indirectly (e.g., via one or more buses).

[0175] The configuration transmission component 1210 can send an indication of a set of candidate beam configurations for a control channel to the UE, the control channel being 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 the SFN pattern.

[0176] In some examples, configuring transmission component 1210 can send signaling that configures two or more downlink reference signals for a QCL type for a TCI state of a control channel. In some examples, configuring transmission component 1210 can send, via signaling, an indication of two or more instances of QCL information for the QCL type, each instance of the QCL information being associated with a respective downlink reference signal of the two or more downlink reference signals. In some examples, configuring transmission component 1210 can send, via signaling, an indication that an instance of QCL information for the QCL type is associated with two or more downlink reference signals.

[0177] In some examples, configuration transmission component 1210 can transmit an indication of a second candidate beam configuration set for a shared channel associated with the control channel, the second beam configuration set comprising the candidate beam configuration set. In some examples, configuration transmission component 1210 can transmit a CORESET configuration indicating the candidate beam configuration set for the control channel.

[0178] In some cases, signaling for configuring a control channel for an SFN pattern configures the SFN pattern for one or more of a search space associated with the control channel or a BWP associated with the control channel. In some cases, the CORESET configuration indicates that more than sixty-four TCI states are configurable for the control channel. In some cases, a candidate beam configuration set is associated with an SFN state. In some cases, an indication of the candidate beam configuration set is sent in RRC signaling.

[0179] Beam configuration determining component 1215 can determine two or more beam configurations to activate for the control channel based on the set of candidate beam configurations.

[0180] Activation transmission component 1220 can transmit an indication to activate two or more beam configurations for a control channel. In some examples, activation transmission component 1220 can transmit an indication to activate each of a set of candidate beam configurations for the control channel, where the set of candidate beam configurations includes two or more activated beam configurations. In some examples, activation transmission component 1220 can transmit an indication to activate one of the set of candidate beam configurations for the control channel and one or more other beam configurations.

[0181] In some examples, activation transmission component 1220 can send an indication to activate two or more of a set of candidate beam configurations for a control channel, the two or more of the set of candidate beam configurations including the two or more activated beam configurations. In some examples, activation transmission component 1220 can send an indication to activate two or more other beam configurations different from any of the set of candidate beam configurations for a control channel, the two or more other beam configurations including the two or more activated beam configurations. In some cases, the indication to activate the two or more beam configurations is sent in a MAC CE.

[0182] The control signal transmission component 1225 can send a control signal on a control channel based on two or more activated beam configurations via two or more TRPs.

[0183] Figure 13 13. A schematic diagram of a system 1300 including a device 1305 according to aspects of the present disclosure is shown. Device 1305 may be an example of, or include components of, device 1005, device 1105, or base station 105 as described herein. Device 1305 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, a memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350).

[0184] The communication manager 1310 may send an indication of a set of candidate beam configurations for a control channel to the UE, the control channel being 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 to activate the two or more beam configurations for the control channel; and send a control signal on the control channel based on the two or more activated beam configurations via the two or more TRPs.

[0185] The network communications manager 1315 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1315 may manage the delivery of data communications for client devices such as one or more UEs 115.

[0186] 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 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, as well as demodulate packets received from the antenna.

[0187] In some cases, a wireless device may include a single antenna 1325. However, in some cases, a device may have more than one antenna 1325 that is capable of concurrently sending or receiving multiple wireless transmissions.

[0188] 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 include, for example, BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0189] The processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting beam configuration indication for a downlink control channel).

[0190] The inter-site communication manager 1345 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with UEs 115 cooperating with other base stations 105. For example, the inter-site communication manager 1345 can coordinate the scheduling of transmissions to the UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 1345 can provide an X2 interface in LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0191] The code 1335 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 1335 may not be directly executed by the processor 1340, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0192] Figure 14 1400 according to various aspects of the present disclosure. The operations of the method 1400 may be implemented by the UE 115 or its components as described herein. For example, the operations of the method 1400 may be implemented by the UE 115 or its components as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0193] At 1405, the UE may receive an indication of a candidate beam configuration set for a control channel from a base station, the control channel being associated with transmission via two or more TRPs. The operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be described with reference to Figures 6 to 9 Describes the configuration receiving component to execute.

[0194] At 1410, the UE may receive an indication to activate two or more beam configurations based on a candidate beam configuration set for a control channel. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be as described with reference to Figures 6 to 9 The described activation is performed by the receiving component.

[0195] At 1415, the UE may receive a control signal on a control channel according to two or more activated beam configurations. The operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be described with reference to Figures 6 to 9 The control signal receiving component described is executed.

[0196] Figure 15 15. A flowchart illustrating a method 1500 according to various aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by the UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the functions described below.

[0197] At 1505, the UE may receive an indication of a candidate beam configuration set for a control channel from a base station, the control channel being associated with transmission via two or more TRPs. The operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be described with reference to Figures 6 to 9 Describes the configuration receiving component to execute.

[0198] At 1510, the UE may receive signaling to configure a control channel for the SFN mode. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be described with reference to Figures 6 to 9 Describes the configuration receiving component to execute.

[0199] At 1515, the UE may receive an indication to activate two or more beam configurations based on the candidate beam configuration set for a control channel. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be as described with reference to Figures 6 to 9 The described activation is performed by the receiving component.

[0200] At 1520, the UE may receive a control signal on a control channel according to two or more activated beam configurations. The operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be described with reference to Figures 6 to 9 The control signal receiving component described is executed.

[0201] Figure 16 1600 according to various aspects of the present disclosure. The operations of the method 1600 may be implemented by the base station 105 or its components as described herein. For example, the operations of the method 1600 may be implemented by reference to Figures 10 to 13 In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0202] At 1605, the base station may send an indication of a set of candidate beam configurations for a control channel to the UE, the control channel being associated with transmissions from two or more TRPs. The operations of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be described with reference to Figures 10 to 13 Describes the configuration of the transport component to perform.

[0203] At 1610, the base station may determine two or more beam configurations to be activated for a control channel based on a set of candidate beam configurations. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be as described with reference to Figures 10 to 13 The beam configuration determination component is used to perform the operation.

[0204] At 1615, the base station may send an indication to activate two or more beam configurations for a control channel. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be as described with reference to Figures 10 to 13 The described activation transfer component is executed.

[0205] At 1620, the base station may transmit a control signal on a control channel based on two or more activated beam configurations via two or more TRPs. The operations of 1620 may be performed according to the methods described herein. In some examples, aspects of the operations of 1620 may be described with reference to Figures 10 to 13 The control signal transmission component described is executed.

[0206] Figure 17 1700 according to various aspects of the present disclosure. The operations of the method 1700 may be implemented by the base station 105 or its components as described herein. For example, the operations of the method 1700 may be implemented by reference to Figures 10 to 13 In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0207] At 1705, the base station may send an indication of a set of candidate beam configurations for a control channel to the UE, the control channel being associated with transmissions from two or more TRPs. The operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be described with reference to Figures 10 to 13 Describes the configuration of the transport component to perform.

[0208] At 1710, the base station may send signaling to configure a control channel for the SFN mode. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be described with reference to Figures 10 to 13 Describes the configuration of the transport component to perform.

[0209] At 1715, the base station may determine two or more beam configurations to be activated for the control channel based on the set of candidate beam configurations. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be as described with reference to Figures 10 to 13 The beam configuration determination component is used to perform the operation.

[0210] At 1720, the base station may send an indication to activate two or more beam configurations for a control channel. The operations of 1720 may be performed according to the methods described herein. In some examples, aspects of the operations of 1720 may be as described with reference to Figures 10 to 13 The described activation transfer component is executed.

[0211] At 1725, the base station may transmit a control signal on a control channel based on two or more activated beam configurations via two or more TRPs. The operations of 1725 may be performed according to the methods described herein. In some examples, aspects of the operations of 1725 may be described with reference to Figures 10 to 13 The control signal transmission component described is executed.

[0212] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or modified, and that other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0213] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for purposes of example, and the terminology of LTE, LTE-A, LTE-A Pro, or NR may be used throughout much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described herein may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0214] The information and signals described herein may be represented using any of a variety of technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips referenced throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0215] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor 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, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0216] The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored or transmitted as one or more instructions or code 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 may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that portions of the functions are implemented in different physical locations.

[0217] Computer-readable medium includes both non-transitory computer storage medium and communication medium, including any medium that helps to transfer a computer program from one place to another.Non-transitory storage medium can be any available medium that can be accessed by a general or special-purpose computer.As an example and not limitation, non-transitory computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or can be used for carrying or storing desired program code components in the form of instruction or data structure and any other non-transitory medium that can be accessed by a general or special-purpose computer or a general or special-purpose processor.Equally, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0218] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items ending with a phrase such as "at least one of..." or "one or more of...") means an inclusive list, so that, for example, a list of at least one of A, B, or C means: A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on condition A and condition 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 "based at least in part on."

[0219] In the drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes the similar components. If only the first reference number is used in the specification, the description applies to any similar component having the same first reference number, regardless of the second or subsequent reference numbers.

[0220] The description set forth herein, in conjunction with the accompanying drawings, describes example configurations and does not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," rather than "preferred" or "superior to other examples." The detailed description includes specific details for the purpose of providing 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 concepts of the described examples.

[0221] The description is provided herein to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but rather conforms to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a user equipment (UE), comprising: a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the apparatus to: receiving signaling for configuring a single frequency network mode for a physical downlink control channel; receiving an indication to activate two or more transmission configuration indicators associated with the signaling for the physical downlink control channel; as well as Two or more downlink reference signals are received, wherein, based at least in part on the single frequency network mode and the two or more activated transmission configuration indicators, one or more demodulation reference signal ports of the physical downlink control channel are quasi-co-located with the two or more downlink reference signals.

2. The device according to claim 1, wherein The signaling for configuring the physical downlink control channel as the single frequency network mode configures the single frequency network mode for a search space associated with the physical downlink control channel or a bandwidth portion associated with the physical downlink control channel.

3. The device according to claim 1, wherein The processing system is further configured to cause the device to: An indication of two or more instances of quasi co-location information of a quasi co-location type is received, each instance of the quasi co-location information being associated with a respective downlink reference signal of the two or more downlink reference signals.

4. The device according to claim 1, wherein The processing system is further configured to cause the device to: An indication is received that an instance of quasi co-location information of a quasi co-location type is associated with the two or more downlink reference signals.

5. The device according to claim 1, wherein The processing system configured to receive the signaling for configuring the single frequency network mode for the physical downlink control channel is further configured to cause the apparatus to: An indication of a plurality of candidate transmission configuration indicators for a shared channel associated with the physical downlink control channel is received, the plurality of candidate transmission configuration indicators including the signaling configuring the single frequency network mode.

6. The device according to claim 1, wherein The processing system configured to receive the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication to activate each of a plurality of candidate transmission configuration indicators associated with the signaling for the physical downlink control channel is received, wherein the plurality of candidate transmission configuration indicators includes the two or more activated transmission configuration indicators.

7. The device according to claim 1, wherein The processing system configured to receive the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication to activate, for the physical downlink control channel, one candidate transmission configuration indicator associated with the signaling and one or more other transmission configuration indicators associated with the signaling is received.

8. The device according to claim 1, wherein The processing system configured to receive the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication is received to activate two or more of a plurality of candidate transmission configuration indicators associated with the signaling for the physical downlink control channel, the two or more of the plurality of candidate transmission configuration indicators including the two or more activated transmission configuration indicators.

9. The device according to claim 1, wherein The processing system configured to receive the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication is received to activate two or more other transmission configuration indicators associated with the signaling for the physical downlink control channel, the two or more other transmission configuration indicators being different from any one of a plurality of candidate transmission configuration indicators and including the two or more activated transmission configuration indicators.

10. The device according to claim 1, wherein The processing system configured to receive the indication is further configured to cause the apparatus to: A control resource set configuration is received, the control resource set configuration indicating the signaling for configuring the single frequency network mode for the physical downlink control channel.

11. The device according to claim 10, wherein The control resource set configuration indicates that more than sixty-four transmission configuration indicator states can be configured for the physical downlink control channel.

12. The device according to claim 1, wherein The signaling is associated with a single frequency network status.

13. The device according to claim 1, wherein The signaling is received in radio resource control signaling.

14. The device according to claim 1, wherein The indication to activate the two or more transmission configuration indicators is received in a medium access control element.

15. An apparatus for wireless communication at a network entity, comprising: a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the apparatus to: Sending signaling for configuring a single frequency network mode for a physical downlink control channel; sending an indication to activate two or more transmission configuration indicators associated with the signaling for the physical downlink control channel; as well as Two or more downlink reference signals are transmitted, wherein, based at least in part on the single frequency network mode and the two or more activated transmission configuration indicators, one or more demodulation reference signal ports of the physical downlink control channel are quasi-co-located with the two or more downlink reference signals.

16. The device according to claim 15, wherein The processing system configured to send the signaling for configuring the single frequency network mode for the physical downlink control channel is further configured to cause the apparatus to: An indication of a plurality of candidate transmission configuration indicators for a shared channel associated with the physical downlink control channel is transmitted, the plurality of candidate transmission configuration indicators including the signaling configuring the single frequency network mode.

17. The device according to claim 15, wherein The processing system configured to send the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication is sent to activate each of a plurality of candidate transmission configuration indicators associated with the signaling for the physical downlink control channel, wherein the plurality of candidate transmission configuration indicators includes the two or more activated transmission configuration indicators.

18. The device according to claim 15, wherein The processing system configured to send the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication is sent to activate a candidate transmission configuration indicator and one or more other transmission configuration indicators for the physical downlink control channel.

19. The device according to claim 15, wherein The processing system configured to send the indication to activate the two or more transmission configuration indicators is further configured to cause the apparatus to: An indication is sent to activate two or more of a plurality of candidate transmission configuration indicators for the physical downlink control channel, the two or more of the plurality of candidate transmission configuration indicators including the two or more activated transmission configuration indicators.

20. A method for wireless communication at a user equipment (UE), comprising: receiving signaling for configuring a single frequency network mode for a physical downlink control channel; receiving an indication to activate two or more transmission configuration indicators associated with the signaling for the physical downlink control channel; as well as Two or more downlink reference signals are received, wherein, based at least in part on the single frequency network mode and the two or more activated transmission configuration indicators, one or more demodulation reference signal ports of the physical downlink control channel are quasi-co-located with the two or more downlink reference signals.

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