Layer mapping method for carrying downlink control information

Abstract

Methods, systems, and devices for wireless communications are described. A base station may identify, for a user equipment (UE), a configuration for receiving a set of downlink control information (DCI) messages on one or more layers of a set of layers of a downlink shared channel. The base station may send a first DCI message to the UE in a downlink control channel, wherein the first DCI message may schedule resources of the downlink shared channel for the set of piggybacked DCI messages. The UE may receive the first DCI message and identify a configuration for receiving the set of DCI messages on one or more layers of the downlink shared channel. The UE may receive the set of DCI messages from the base station on one or more layers of the downlink shared channel based on the identified configuration.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 63 / 020,493, filed by MA et al. on May 5, 2020, entitled “LAYER MAPPING METHODS FOR PIGGYBACKED DOWNLINK CONTROL INFORMATION,” and U.S. Patent Application No. 17 / 244,916, filed by MA et al. on April 29, 2021, entitled “LAYER MAPPING METHODS FOR PIGGYBACKED DOWNLINK CONTROL INFORMATION,” each of which is assigned to the assignee. Technical Field

[0003] The following relates generally to wireless communications, and more particularly, to a layer mapping method for piggybacked downlink control information (DCI). Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messages, broadcasts, etc. These systems may be able to 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 that 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 that may also be referred to as user equipment (UE).

[0005] In some wireless communication systems, one or more downlink control information (DCI) messages may be piggybacked on a downlink shared channel. Conventional techniques related to configuring piggybacked DCI on a downlink shared channel may be improved. Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses for layer mapping methods of supporting piggybacked downlink control information (DCI). In general, the described technology provides a method by which a base station or a user equipment (UE) or both can configure one or more DCIs on a downlink shared channel (e.g., a physical downlink shared channel (PDSCH)) when a downlink shared channel is configured with one or more layers or codewords. For example, a base station can identify a configuration for a UE to receive a group of DCI messages on one or more layers in a group of layers of a downlink shared channel. The configuration can piggyback all DCIs on a single layer, or can split the DCIs and piggyback the DCIs on multiple layers. In some cases, the piggyback configuration can be based on a modulation and coding scheme (MCS) or signal-to-noise ratio (SNR) of one or more layers in a layer, based on a preconfigured or signaled threshold, or based on the number and number of layers of DCI, or a combination thereof. The base station can send a first DCI message to the UE in a downlink control channel (e.g., a physical downlink control channel (PDCCH)), wherein the first DCI message can schedule resources of the downlink shared channel for the group of DCI messages. The UE may receive the first DCI message and identify a configuration for receiving the set of DCI messages on one or more layers of a downlink shared channel. The UE may receive the set of DCI messages from the base station on one or more layers of the downlink shared channel based on the identified configuration.

[0007] A method of wireless communication at a UE is described. The method may include: receiving a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages; identifying a configuration for receiving the group of DCI messages on one or more layers of a group of layers of the downlink shared channel based on the first DCI message; and receiving the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: receive a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages; identify a configuration for receiving the group of DCI messages on one or more layers of a group of layers of a downlink shared channel based on the first DCI message; and receive the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include components for: receiving a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages; identifying a configuration for receiving the group of DCI messages on one or more layers of a group of layers of a downlink shared channel based on the first DCI message; and receiving the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[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 for: receiving a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages; identifying a configuration for receiving the group of DCI messages on one or more layers of a group of layers of a downlink shared channel based on the first DCI message; and receiving the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, identifying a configuration may include operations, features, components, or instructions for identifying that the group of DCI messages can be mapped to a single layer in the group of layers, where the one or more layers include the single layer.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a highest MCS for the set of layers.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a highest SNR for the set of layers.

[0014] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a lowest index value for the set of layers.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for identifying a ratio of a first payload size of the group of DCI messages mapped to a single layer to a second payload size of a downlink shared channel mapped to the single layer, and determining that the ratio fails to meet a threshold, wherein the group of DCI messages may be mapped to the single layer based on the determination.

[0016] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the MCS associated with the downlink shared channel of the single layer may be a highest MCS of the downlink shared channels of the group of layers.

[0017] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the identification configuration may include operations, features, components, or instructions for identifying a ratio of a first payload size of the group of DCI messages mapped to a single layer of the group of layers to a second payload size of a downlink shared channel mapped to the single layer, and determining that the ratio satisfies a threshold, wherein based on the determination, the group of DCI messages can be mapped to multiple layers of the group of layers.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the MCS associated with the second payload size of the downlink shared channel may be a highest MCS of the downlink shared channels of the set of layers.

[0019] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the identification configuration may include operations, features, components, or instructions for identifying that the group of DCI messages can be mapped to multiple layers in the group of layers, and for each layer in the multiple layers, identifying that a first number of DCI messages in the group of DCI messages mapped to the layer differs by no more than one from a second number of DCI messages in the group of DCI messages mapped to any other layer in the multiple layers.

[0020] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages may be the same number for each of the multiple layers.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages for the layer may be a different number than a second number of DCI messages for at least one other layer of the multiple layers.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages includes a first portion of a second DCI message and the second number of DCI messages includes a second portion of the second DCI message.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be concatenated on one or more layers.

[0024] A method for wireless communication at a base station is described. The method may include: identifying a configuration for a UE to receive a set of DCI messages on one or more layers of a set of layers of a downlink shared channel; sending a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the set of DCI messages; and sending the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0025] 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: identify a configuration for a UE to receive a group of DCI messages on one or more layers of a group of layers of a downlink shared channel; send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the group of DCI messages; and send the group of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0026] Another apparatus for wireless communication at a base station is described. The apparatus may include components for: identifying a configuration for a UE to receive a set of DCI messages on one or more layers of a set of layers of a downlink shared channel; sending a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the set of DCI messages; and sending the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0027] 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 for: identifying a configuration for a UE to receive a set of DCI messages on one or more layers of a set of layers of a downlink shared channel; sending a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the set of DCI messages; and sending the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0028] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for mapping the set of DCI messages to a single layer, where the set of DCI messages may be transmitted on the single layer.

[0029] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a highest MCS for the set of layers.

[0030] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a highest SNR for the set of layers.

[0031] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be mapped to a single layer based on the single layer having a lowest index value for the set of layers.

[0032] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for comparing a first payload size of the group of DCI messages on a single layer of the group of layers with a second payload size of a downlink shared channel on the single layer, and mapping the group of DCI messages to the single layer based on a result of the comparison, wherein the group of DCI messages can be transmitted on the single layer.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, an MCS associated with a downlink shared channel of a single layer may be a highest MCS of the downlink shared channels of the set of layers.

[0034] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for comparing a first payload size of the group of DCI messages with a second payload size of a downlink shared channel, and mapping the group of DCI messages to multiple layers based on a result of the comparison, wherein the group of DCI messages may be transmitted over the multiple layers.

[0035] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the MCS associated with the second payload size of the downlink shared channel may be a highest MCS of the downlink shared channels of the set of layers.

[0036] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for mapping the group of DCI messages to multiple layers over which the group of DCI messages is transmitted, wherein, for each layer in the multiple layers, a first number of DCI messages in the group of DCI messages mapped to that layer differs by no more than one from a second number of DCI messages in the group of DCI messages mapped to any other layer in the multiple layers.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages may be the same number for each of the multiple layers.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages for the layer may be a different number than a second number of DCI messages for at least one other layer of the multiple layers.

[0039] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the first number of DCI messages includes a first portion of a second DCI message and the second number of DCI messages includes a second portion of the second DCI message.

[0040] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of DCI messages may be concatenated on one or more layers.

[0041] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and methods of operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations to the claims.

[0042] Although various aspects and embodiments are described in this application by the description of some examples, it will be understood by those skilled in the art that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described here can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, embodiments and / or uses may be implemented by integrated chip embodiments and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchase devices, medical devices, devices that enable artificial intelligence (AI), etc.). Although some examples may or may not be specifically targeted at use cases or applications, a variety of applicability of the described innovations may occur. The range of implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to collections, distributed or original equipment manufacturers (OEM) devices or systems that combine one or more aspects of the described innovations. In some practical settings, the devices that combine the described aspects and features may also have to include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals must include multiple components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processor(s), interleavers, adders / summers, etc.). It is intended that the innovations described herein can be implemented in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 An example of a wireless communication system supporting a layer mapping method of piggybacked downlink control information (DCI) according to aspects of the present disclosure is illustrated.

[0044] Figure 2 An example of a wireless communication system supporting a layer mapping method of a piggybacked DCI according to aspects of the present disclosure is illustrated.

[0045] Figure 3 An example of a resource map supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is illustrated.

[0046] Figures 4 to 6 An example of a DCI piggybacking scheme supporting a layer mapping method of piggybacked DCI according to aspects of the present disclosure is illustrated.

[0047] Figure 7 An example of a process flow of a layer mapping method supporting piggybacked DCI according to aspects of the present disclosure is illustrated.

[0048] Figure 8 and Fig. 9A block diagram of a device supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0049] Fig.10 A block diagram of a communication manager supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0050] Fig.11 A diagram of a system including devices supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0051] Fig.12 and 13 A block diagram of a device supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0052] Fig.14 A block diagram of a communication manager supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0053] Fig.15 A diagram of a system including devices supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown.

[0054] Figures 16 to 19 A flow chart of a method is shown in which a method of layer mapping for supporting piggybacked DCI according to aspects of the present disclosure is illustrated. DETAILED DESCRIPTION

[0055] Some wireless communication systems may operate in a high frequency (HF) band (e.g., 60 GHz). In such a high frequency band, due to a higher subcarrier spacing (e.g., 960 kHz, 1.92 MHz, 3.84 MHz), the slot duration may be shorter than the slot duration of other wireless communication systems operating in lower frequency bands (e.g., systems operating in frequency range 1 (FR1), or frequency range 2 (FR2), or a combination thereof). In this way, the number of control channel (e.g., physical downlink control channel (PDCCH)) monitoring opportunities may increase, which may result in high power consumption. In addition, due to the shorter slot duration and narrow analog beamforming transmission in the HF band, the opportunity to send multiple DCIs to multiple different UEs may be reduced. Conversely, a base station may send multiple DCIs to the same UE. In order to reduce power consumption, control channel monitoring opportunities may be reduced due to the high specificity of the HF band beams targeting a single UE.

[0056] Some wireless communication systems can use piggybacked downlink control information (DCI) messages to enable a user equipment (UE) to reduce the frequency of control channel monitoring at the UE. For example, the UE can be configured to monitor a control channel resource in a periodic time slot for the DCI message, and can suppress monitoring the control channel resource in one or more of the time slots between the periodic time slots. The DCI message received in the periodic time slot can schedule shared channel resources in the time slots between the periodic time slots. For example, the UE can receive piggybacked DCI periodically. The piggybacked DCI can indicate scheduling information (e.g., grant information) for one or more time slots in which the DCI will not be received. In this way, the UE can not monitor the control region associated with the time slots in which the DCI may not be received. The piggybacked DCI can be scheduled by a DCI message received in the control region of the time slot. For example, a DCI message received by the UE in a control channel resource can schedule the UE to receive one or more additional DCI messages and data in a downlink shared channel resource. Piggybacking the DCI message on the downlink shared channel in this way can reduce the control channel monitoring density at the UE, which can support reducing the power consumption at the UE.

[0057] In some cases, the UE can be configured with multiple codewords (e.g., such as in a multiple-input multiple-output (MIMO) scenario), or multiple layers, or both. In such a case, the configuration of the set of DCI messages in the shared channel can be based on the number of layers configured for the UE. In some implementations, each DCI in the set of DCI messages can be mapped to a single layer. The DCI can be mapped to the layer with a higher modulation and coding scheme (MCS) among the available layers, or the layer associated with a higher signal-to-noise ratio (SNR), or both. In some cases, the DCI can be mapped to the layer with the lowest index, such as if each layer has the same MCS or SNR. In some cases, the payload associated with the piggybacked DCI can be large. To mitigate the large DCI payload, a threshold and a payload ratio can be configured. In some examples, if the payload of the piggybacked DCI on a layer is higher than a pre-configured or signaled threshold with respect to the payload of the shared channel with a higher MCS or SNR, the DCI can be split between multiple layers. In some cases, regardless of the MCS and SNR, the DCI can be mapped to multiple layers. For example, the DCI can be evenly mapped on each available layer.

[0058] Certain aspects of the subject matter described herein may be implemented to achieve one or more advantages. The described techniques may support improvements in carrying a set of DCI messages on a shared channel by implementing configurations that consider UEs that support multiple layers or codewords or both. Among other advantages, the described techniques may reduce power consumption and reduce payload. Thus, the supported techniques may include improved network operation, and in some examples, may increase network efficiency, among other benefits.

[0059] Initially, various aspects of the present disclosure are described in the context of a wireless communication system. Then, various aspects are described with respect to resource maps, DCI piggybacking schemes, and processing flows. Various aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow diagrams related to layer mapping methods for piggybacked DCI.

[0060] Figure 1 An example of a wireless communication system 100 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is illustrated. 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 communications, ultra-reliable (e.g., mission-critical) communications, low-latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0061] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100, and may be devices of different forms or with different 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 UEs 115 and base stations 105 may establish one or more communication links 125. Coverage areas 110 may be examples of geographic areas over which base stations 105 and UEs 115 may support communication of signals according to one or more radio access technologies.

[0062] 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 1Some example UEs 115 are illustrated in the figure. The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), as Figure 1 shown.

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

[0064] One or more of the base stations 105 described herein can include or can be referred to by those of ordinary skill in the art as a base station transceiver, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next generation NodeB, or gigabit NodeB (any of which can be referred to as a gNB), home NodeB, home eNodeB, or other suitable terms.

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

[0066] The UEs 115 described herein are capable of communicating with various types of devices, such as other UEs 115 and network devices that can sometimes act as relays as well as base stations 105, and the network devices include macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc., as Figure 1 shown.

[0067] The UE 115 and the base station 105 can communicate with each other wirelessly via one or more communication links 125 through one or more carriers. The term "carrier" can refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 can include a portion (e.g., bandwidth portion (BWP)) of an RF spectrum band that operates 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 operations, 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. According to 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 with frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0068] 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 a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and the 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 UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115. Wireless communication resources may refer to a combination of RF spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integration of communications with UE 115.

[0069] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, T s =1 / (Δf max ·N f ) seconds sampling period, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames, each radio frame 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).

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

[0071] 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)).

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

[0073] In some examples, the base stations 105 may be mobile, and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may 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.

[0074] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE115 may be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may 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 may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency may be used interchangeably here.

[0075] In some examples, UE 115 is also able to communicate directly with other UE 115 via 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 a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105 or unable to receive transmissions from the 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, the base station 105 facilitates resource scheduling for D2D communication. In other cases, D2D communication is performed between UEs 115 without the intervention of the base station 105.

[0076] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connection, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing 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)) for routing or interconnecting packets to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UE 115 served by a base station 105 associated with the core network 130. User IP packets may be transmitted through user plane entities, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. The operator IP service 150 may include access to the Internet, (multiple) intranets, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0077] 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 transport entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transport 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 merged into a single network device (e.g., base station 105).

[0078] The wireless communication system 100 may operate using one or more frequency bands, generally 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 about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may be sufficient to penetrate structures to enable macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than transmissions using smaller frequencies and longer waves in the HF or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0079] The wireless communication system 100 can utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 can adopt 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 RF spectrum band, devices such as base stations 105 and UEs 115 can use carrier sensing for conflict detection and avoidance. In some examples, operations in unlicensed bands can be based on a carrier aggregation configuration combined with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed bands can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0080] The base station 105 or UE 115 may be equipped with multiple antennas that may be used to employ techniques such as transmit diversity, receive diversity, 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 may 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, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the base station 105 may be located at various geographic 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 may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming of signals sent via the antenna ports.

[0081] The base station 105 or UE 115 can use MIMO communication by sending or receiving multiple signals via different spatial layers to take advantage of multipath signal propagation and improve spectral efficiency. 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 technology includes single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to the same receiving device and in multi-user MIMO, multiple spatial layers are sent to multiple devices.

[0082] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of the antenna elements may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0083] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be based on IP. The radio link control (RLC) layer can perform packet segmentation and reorganization to communicate through 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 of 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 the RRC connection between the UE 115 and the base station 105 or the core network 130 that supports the radio bearer of the user plane data. At the physical layer, the transport channel can be mapped to the physical channel.

[0084] When a downlink shared channel is configured with one or more layers or codewords, the base station 105 or the UE 115 or both may configure one or more DCIs on a downlink shared channel (e.g., a physical downlink shared channel (PDSCH)). For example, the base station 105 may identify a configuration for the UE 115 to receive a set of DCI messages on one or more layers of a set of layers of the downlink shared channel. The configuration may carry all DCIs on a single layer, or may split the DCIs and carry the DCIs on multiple layers. In some cases, the carrying configuration may be based on a preconfigured or signaled threshold. The base station 105 may send a first DCI message to the UE 115 in a downlink control channel (e.g., a PDCCH), wherein the first DCI message may schedule resources of the downlink shared channel for the group of DCI messages. The UE 115 may receive the first DCI message and identify a configuration for receiving the group of DCI messages on one or more layers of the downlink shared channel. UE 115 may receive the set of DCI messages from base station 105 on one or more layers of the downlink shared channel based on the identified configuration.

[0085] Figure 2 An example of a wireless communication system 200 supporting a layer mapping method for a piggybacked DCI according to aspects of the present disclosure is illustrated. The wireless communication system 200 may include a base station 105-a and a UE 115-a, which may be as described in reference Figure 1 Examples of base stations 105 and UEs 115 are described. In some cases, base station 105-a may implement a DCI mapping process to map one or more DCIs to one or more layers of a downlink shared channel. Additionally or alternatively, other wireless devices such as UE 115-a may implement a DCI mapping process.

[0086] The base station 105-a may communicate with the UE 115-a over one or more time slots 205, where each time slot 205 may include one or more symbols. Each time slot 205 may include a control region 210 and a data region 215. In some examples, the base station 105-a may send a DCI message 220 to the UE 115-a in the control region 210 of the time slot 205. For example, in this example, the base station 105-a may send the DCI message 220 to the UE 115-a in the control region 210 of the time slot 205-a. The DCI message 220 may schedule one or more DCI messages 225 in the data region 215 of the time slot 205 in which the DCI message 220 is received. For example, in this example, the control channel DCI message 220 received in the time slot 205-a may schedule one or more shared channel DCI messages 225 in the data region 215 of the time slot 205-a. One or more shared channel DCI messages 225 may be carried on a shared channel resource (e.g., a PDSCH or a physical uplink shared channel (PUSCH) resource) in the data region 215. In this case, one or more shared channel DCI messages 225 may be multiplexed with one or more downlink shared channel messages.

[0087] In some embodiments, the shared channel may be configured with multiple codewords or layers or both. In this case, the configuration of one or more shared channel DCI messages 225 in the shared channel may be based on the number of layers that UE115-a is configured with. In some implementations, each DCI in the group of one or more shared channel DCI messages 225 may be mapped to a single layer. One or more shared channel DCI messages 225 may be mapped to a layer with a higher MCS in the available layers, or a layer associated with a higher SNR, or both. In some cases, such as if each layer has the same MCS or SNR, the DCI may be mapped to the layer with the lowest index. In some cases, the payload associated with one or more shared channel DCI messages 225 may be large. In order to mitigate the large DCI payload, a threshold may be configured. In some examples, if the payload of one or more shared channel DCI messages 225 on a layer is higher than a preconfigured or signaled threshold relative to the payload of a shared channel with a higher MCS or SNR, one or more shared channel DCI messages 225 may be split between multiple layers. In some cases, regardless of MCS and SNR, one or more shared channel DCI messages 225 may be mapped to multiple layers. For example, one or more shared channel DCI messages 225 may be evenly mapped on each available layer.

[0088] The one or more shared channel DCI messages 225 may then schedule data transmissions from the base station 105-a (e.g., downlink data transmissions, such as PDSCH transmissions) or data transmissions to the base station 105-a (e.g., uplink data transmissions, such as PUSCH transmissions) in one or more corresponding time slots 205. For example, a first DCI message 225 received in the data region 215 of the time slot 205-a may schedule a first downlink data transmission in the time slot 205-b; a second DCI message 225 received in the data region 215 of the time slot 205-a may schedule a second downlink data transmission in the time slot 205-d; a third DCI message 225 in the data region 215 of the time slot 205-a may schedule a third downlink data transmission in the time slot 205-e; and a fourth DCI message 225 in the data region 215 of the time slot 205-a may schedule a fourth downlink data transmission in the time slot 205-g. UE 115-a may decode one or more shared channel DCI messages 225 and identify a set of resources for receiving or sending future data transmissions in one or more scheduled shared channels 230. The first, second, third, and fourth DCI messages 225 may be adjacent in frequency or time to at least one other of the first, second, third, and fourth DCI messages 225.

[0089] Figure 3 An example of a resource map 300 of a layer mapping method for supporting piggybacked DCI according to aspects of the present disclosure is illustrated. In some examples, the resource map 300 can be implemented by aspects of the wireless communication system 100 and / or 200. The resource map 300 includes a plurality of time slots 305 in a time domain in which a base station and a UE can communicate (e.g., a base station can send a downlink message to a UE). The time slots 305 can include a control region 310 and a data region 315. The control region 310 can be used by the base station to send a DCI message (e.g., a DCI message 320), while the data region 315 can be used to send a data message, and in some examples, to send a DCI message 330 piggybacked on a data channel.

[0090] The base station may send a DCI message 320 to the UE. The DCI message 320 may include control information, scheduling information, demodulation reference signal (DMRS) information, a grant, and the like. The scheduling information may indicate that the UE will communicate (e.g., send a transmission to or receive a transmission from the base station) in a time slot 305-a or a subsequent time slot 305 such as the time slot 305-a in which the DCI message 320 is received. In some cases, the base station may piggyback the DCI information of the UE on resources in a data region assigned to the UE. For example, the base station 105 may send the DCI message 320 to the UE. The DCI message 320 may indicate scheduled resources 325, where the UE may receive one or more additional DCI messages 330 in a data region 315 assigned to the UE. In some cases, the DCI message 320 (e.g., a DCI message 320 in a CORESET of a time slot 305-a) may include a shared channel DCI message 330 allocation information, a common portion of multiple shared channel DCI messages 330, and a grant for a shared channel of the time slot 305-a.

[0091] In some implementations, the UE may be configured with multiple codewords or layers or both, so that the data region 315 (e.g., a shared channel) may support multiple codewords or layers. In this case, the configuration of one or more DCI messages 330 in the data region 315 may be based on the number of layers that the UE is configured with. In some implementations, each DCI message 330 may be mapped to a single layer. One or more DCI messages 330 may be mapped to a layer with a higher MCS in the available layers, or a layer associated with the highest SNR, or both. In some cases, such as if each layer has the same MCS or SNR, the DCI message 330 may be mapped to the layer with the lowest index. In some cases, in this example, the payload associated with the four DCI messages 330 may be large. In order to mitigate the large DCI payload, a threshold may be configured. In some examples, if the payload of the four DCI messages 330 on one layer is higher than a preconfigured or signaled threshold relative to the payload of the shared channel with a higher MCS or SNR, the DCI message 330 may be split in multiple layers. In some cases, regardless of the MCS and SNR, the DCI message 330 may be mapped to multiple layers. For example, the DCI message 330 may be evenly mapped on each available layer. For example, in the case of two layers and four DCI messages 330, two DCI messages 330 (e.g., DCI messages 330-a and 330-b, or some other combination of DCI messages 330) may be mapped to the first layer, and two other DCI messages 330 (e.g., DCI messages 330-c and 330-d, or some other combination of DCI messages 330) may be mapped to the second layer.

[0092] One or more additional DCI messages 330 may include scheduling information for subsequent data communications. The scheduling information may indicate one or more subsequent data areas in which the UE may communicate or in which another UE may communicate. For example, a DCI message 330-a may schedule (e.g., provide authorization to) the UE to communicate in time slot 305-c, a DCI message 330-b may schedule the UE to communicate in time slot 305-d, a DCI message 330-c may schedule the UE to communicate in time slot 305-f, and a DCI message 330-d may schedule the UE to communicate in time slot 305-g. The UE may communicate in each time slot indicated by the received DCI message 330. Additionally or alternatively, the UE may suppress communication in other time slots 305 in which the UE is not scheduled to communicate, such as time slot 305e, through a DCI message. In some cases, other UEs may communicate in these time slots 305 (e.g., time slots 305 that are not assigned to the UE or multiplexed with the UE in time slot 305). The UE may periodically monitor the control information. For example, the UE may monitor the control region 310 in time slot 305-a to check scheduling information (e.g., monitoring CORESET, DCI, authorization) for time slots 305-a to 305-g. The UE may then refrain from monitoring the control region 310 in time slots 305-b to 305-g, and may then monitor the control region 310 in time slot 305h (e.g., based on static or dynamic periodicity of control channel monitoring). In this way, the UE's control region 310 monitoring density may be reduced, which may reduce power consumption at the UE and improve micro-sleep processes because the UE will identify whether to wake up in a particular time slot based on the piggybacked DCI message 330. The control region 310 in time slot 305h may schedule data communications for the UE for time slot 305h, time slot 305i, and subsequent time slots until the next control channel monitoring opportunity.

[0093] Figure 4 An example of a DCI piggybacking scheme 400 for supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is illustrated. In some examples, the DCI piggybacking scheme 400 may be implemented by aspects of the wireless communication system 100 and / or 200. In some cases, as shown in FIG. Figure 2 and Figure 3As described, the UE may be configured with multiple layers or codewords or both. Codewords and layers may be used interchangeably. For example, the DCI piggybacking scheme 400 may represent a process by which a base station may configure a downlink shared channel message 405 (e.g., shared channel messages 405-a and 405-b) and N DCI messages 410 (e.g., DCI messages 410-a and 410-b) piggybacked on one or more layers of a downlink shared channel where the downlink shared channel message 405 resides. In some cases, the base station may configure any number of DCI messages between DCI messages 410-a and 410-b.

[0094] In some implementations, the base station may be configured to map a piggyback DCI message (e.g., DCI message 410-a and 410-b) or a cascaded DCI message 410 on a single layer supported by the UE. The base station may determine to which layer the DCI message 410 is mapped. In some implementations, the layer may be selected based on MCS, SNR, or some other metric of the layer. For example, before DCI mapping, the base station may send one or more reference signals to the UE. The UE may receive and measure reference signals on one or more layers of the UE. For example, the UE may measure reference signal received power (RSRP), reference signal received quality (RSRQ), SNR, or perform some other measurements on the received reference signal and determine the quality of each layer. The UE may indicate the quality of one or more layers in a channel state information (CSI) report sent by the UE to the base station. The CSI report may include a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI), or a combination thereof. The base station may receive the CSI report and determine the rank of the layer with respect to the quality. The base station may assign a higher MCS to a higher quality layer.

[0095] Compared to data transmission in a shared channel, control information can be configured to have higher quality (e.g., lower block error rate (BLER)) because shared channels can utilize error correction schemes (e.g., hybrid ARQ) while control information cannot. In this way, the base station can map the DCI message 410 to the layer associated with the highest quality (e.g., the layer assigned the highest MCS or associated with the highest SNR) to ensure high reliability. In some cases, such as the case of poor granularity in one example, each layer may have the same MCS or SNR. In this case, the base station may map the DCI message to the layer with the lowest index value (e.g., layer 0, codeword 0). In some cases, the shared channel message 405-a may be mapped to the highest quality layer, or the layer with the lowest index, or a combination thereof. In this way, the base station 105-a may map the DCI messages 410-a and 410-b to the same layer as the shared channel message 405-a. In some cases, the shared channel message 405-b may be mapped to a channel of lower quality, or a channel with a higher index, or a combination thereof.

[0096] At 415-a, the base station may perform channel coding on the downlink shared channel message 405. Similarly, the base station may perform channel coding on each of the N DCI messages 410. For example, at 415-b and 415-c, the base station 105 may perform channel coding on the first DCI message 410-a and the second DCI message 410-b. At 415-d, the base station may perform channel coding on the shared channel message 405-b. When performing channel coding on each of the N DCI messages 410, at 420, the base station 105 may concatenate the N channel coded DCI messages 410 together.

[0097] In some implementations, at 425-a, the base station may scramble the concatenated DCI message 410. In some other implementations, after multiplexing at 430, the base station may scramble the message at 425-a. In one example, the base station may scramble the concatenated DCI message 410 at 425-a and multiplex the scrambled message with the shared channel message 405-a at 430. Then, at 435-a, the base station may modulate the multiplexed DCI message 410 and the shared channel message 405-a. In another example, at 430, the base station may multiplex the concatenated message 420 with the shared channel message 405-a and scramble the multiplexed message at 425-b. Then, at 435-a, the base station may modulate the scrambled message. At the same time, the base station may scramble the shared channel message 405-b at 425-c and modulate the scrambled message at 435-b.

[0098] At 425, the base station 105 may multiplex the concatenated N DCI messages 410 with the channel coded downlink shared channel message 405. At 430, the base station 105 may scramble the multiplexed message according to a UE-specific scrambling sequence. At 435, the base station 105 may modulate the scrambled message and may send the modulated message as a set of coded bits to the UE.

[0099] After modulation, the base station may perform layer mapping at 440 and precoding at 445. The base station may split the precoding and perform inverse fast Fourier transforms 450-a and 450-b, and may transmit by antenna ports 455-a and 455-b, respectively.

[0100] Figure 5 An example of a DCI piggybacking scheme 500 for supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is illustrated. In some examples, the DCI piggybacking scheme 500 may be implemented by aspects of the wireless communication system 100 and / or 200. In some cases, as shown in FIG. Figure 2 and Figure 3 As described, the UE may be configured with multiple layers or codewords or both. Codewords and layers may be used interchangeably. For example, the DCI piggybacking scheme 500 may represent a process by which a base station may configure a downlink shared channel message 505 (e.g., shared channel messages 505-a and 505-b) and N DCI messages 510 (e.g., DCI messages 510-a, 510-b, 510-c, and 510-b) piggybacked on one or more layers of a downlink shared channel where the downlink shared channel message 505 resides. In some cases, the base station may configure any number of DCI messages between DCI messages 510-a and 510-b and between DCI messages 510.

[0101] In some implementations, the base station may be configured to mitigate large DCI payloads. To reduce the payload of piggybacked DCI messages 510 and mitigate the impact on the shared channel, a payload ratio and a threshold may be configured, wherein the number of DCI messages 510 that can be mapped to a single layer may depend on the threshold. For example, if the payload of all DCI messages 510 relative to the payload of the higher MCS or SNR shared channel payload is above a threshold (e.g., Where δ is pre-configured or signaled by the base station or the network), not all DCI messages 510 are mapped to a single layer. Instead, a subset of DCI messages 510 may be placed on one layer, and a subset of DCI messages may be placed on another layer.

[0102] At 502, the base station may determine whether the DCI payload meets (e.g., exceeds) the threshold. Based on the determination, the base station may map the DCI message 510 to one or more layers. If the DCI payload is less than or equal to the threshold relative to the shared channel payload associated on the layer with the higher MCS or SNR, the DCI message 510 may be mapped to a single layer. If the DCI payload is greater than the threshold relative to the shared channel payload associated on the layer with the higher MCS or SNR, the DCI message 510 may be split between multiple layers. The DCI message 510 may be split unevenly across layers. In some cases, the same number of DCI messages 510 that push the payload ratio above the threshold may be mapped to the layer with the second highest MCS or SNR, or the second lowest index in the available layers, or some other number of DCI messages 510 may be mapped to one or more different layers. In some embodiments, the threshold δ may be preconfigured. In some implementations, the threshold δ may be signaled by the network or base station dynamically (eg, via DCI or MAC CE signaling), semi-statically (eg, via RRC signaling), or aperiodically (eg, via RRC signaling).

[0103] In one example, the DCI payload associated with DCI messages 510-a, 510-b, 510-c, and 510-d may exceed a threshold. In some cases, DCI messages 510-a, 510-b, and 510-c may also exceed a threshold. In this way, DCI messages 510-a and 510-b may be mapped to a layer with a higher MCS or SNR or a lowest index, while DCI messages 510-c and 510-d may be mapped to a layer with a lower MCS or SNR or a higher index, and vice versa.

[0104] At 515 (e.g., 515-a to 515-f), the base station may perform channel coding on each shared channel message 505 and each DCI message 510. At 520, the base station may concatenate the DCI messages 510 on each layer. For example, the base station may concatenate DCI messages 510-a and 510-b on the first layer at 520-a, and concatenate DCI messages 510-c and 510-d on the second layer at 520-b. Figure 4As described, the base station may scramble the message before or after multiplexing. For example, the base station may scramble the concatenated DCI message 510 at 525-a and 525-b, or scramble the multiplexed DCI message 510 and shared channel message 505 at 525-c and 525-d. Based on when the scrambling is performed, the base station may multiplex the scrambled DCI message 510 with the shared channel message 505 at 530-a and 530-b, or the base station may multiplex the concatenated DCI message 510 with the shared channel message 505 at 530-a and 530-b. After scrambling at 525-c and 525-d or multiplexing at 530-a and 530-b, the base station may perform further processes at 545 (such as precoding, IFFT, and transmission through antenna ports, as described in reference). Figure 4 As described above, modulation is performed at 535-a and 535-b, and layer mapping is performed at 540.

[0105] Figure 6 An example of a DCI piggybacking scheme 600 for supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is illustrated. In some examples, the DCI piggybacking scheme 600 may be implemented by aspects of wireless communication systems 100 and / or 200. In some cases, as shown in FIG. Figure 2 and Figure 3 As described, the UE may be configured with multiple layers or codewords or both. Codewords and layers may be used interchangeably. For example, the DCI piggybacking scheme 600 may represent a process by which a base station may configure a downlink shared channel message 605 (e.g., shared channel messages 605-a and 605-b) and N DCI messages 610 (e.g., DCI messages 610-a, 610-b, 610-c, and 610-b) piggybacked on one or more layers of a downlink shared channel where the downlink shared channel message 605 resides. In some cases, the base station may configure any number of DCI messages between DCI messages 610-a and 610-b and between DCI messages 610.

[0106] In some implementations, the base station may be configured to map DCI messages 610 across multiple layers. The base station may be configured to map DCI messages 610 evenly across available layers. For example, if the UE is configured with two layers and the base station has four DCI messages 610 to map, two of the DCI messages 610 may be placed on the first layer and two of the DCI messages may be placed on the second layer. DCI messages 510-a and 510-b may be mapped to the first layer, while DCI messages 510c and 510d may be mapped to the second layer, or vice versa.

[0107] In some cases, the DCI message 610 may not be evenly divided across the available layers. For example, the UE may be configured with two layers, and the base station may have three DCI messages 610 to map. In some embodiments, the base station may be configured to unevenly map the DCI messages 610 across layers, such that one layer has one additional DCI message 610 than the other layer or layers. For example, the base station may map two DCI messages 610 to the first layer and another DCI message 610 to the second layer. In some implementations, the base station may be configured to divide the remaining DCI messages that cannot be evenly divided across two layers. For example, the base station may map one DCI message 610 to the first layer, map the second DCI message to the second layer, and evenly split the third DCI message 610 so that a first bit subset of the third DCI message 610 is mapped to the first layer, and a second bit subset of the third DCI message 610 is mapped to the second layer. In some implementations, if the DCI message 610 cannot be evenly divided across the available layers, the base station may be configured to concatenate the DCI messages 610 and split the concatenated messages evenly across the available layers.

[0108] exist Figure 6 In the depicted example, the DCI message 610 may be evenly mapped across two available layers supported by the UE. At 615 (e.g., 615-a to 615-f), the base station may perform channel coding on each of the shared channel messages 605 and each of the DCI messages 610. At 620, the base station may concatenate the DCI messages 610 on each layer. For example, the base station may concatenate DCI messages 610-a and 610-b on a first layer at 620-a, and concatenate DCI messages 610-c and 610-d on a second layer at 620-b. As described in reference Figure 4 As described, the base station may scramble the message before or after multiplexing. For example, the base station may scramble the concatenated DCI message 610 at 625-a and 625-b, or scramble the multiplexed DCI message 610 and shared channel message 605 at 625-c and 625-d. Based on when the scrambling is performed, the base station may multiplex the scrambled DCI message 610 with the shared channel message 605 at 630-a and 630-b, or the base station may multiplex the concatenated DCI message 610 with the shared channel message 605 at 630-a and 630-b. After scrambling at 625-c and 625d or multiplexing at 630-a and 630-b, the base station may perform modulation at 635-a and 635-b, and further processes at 645 (such as precoding, IFFT, and transmission through antenna ports, as described in reference) may be performed. Figure 4 Layer mapping is performed before the above).

[0109] Figure 7An example of a process flow 700 of a layer mapping method for supporting piggybacked DCI according to aspects of the present disclosure is illustrated. The process flow 700 may illustrate an example DCI piggybacking process. For example, a base station 105-b may determine a DCI piggybacking configuration and signal the configuration to a UE 115-b. The base station 105-b and the UE 115-b may be referenced. Figures 1 to 6 Examples of corresponding wireless devices described. In some cases, a different type of wireless device (e.g., UE 115) may determine the DCI piggyback configuration instead of base station 105-b implementing the DCI piggyback process. The following alternative examples may be implemented, in which some of the steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or more steps may be added.

[0110] At 705, base station 105-b may identify a configuration for UE 115-b for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. At 710, UE 115-b may receive a first DCI message in a downlink control channel that schedules a first resource of the downlink shared channel for a set of DCI messages.

[0111] At 715, UE 115-b may identify, based on the first DCI message, a configuration for receiving the set of DCI messages on one or more layers in a set of layers of a downlink shared channel. In some implementations, UE 115-a may identify that the set of DCI messages is mapped to a single layer in the set of layers, where the one or more layers include the single layer. The DCI message may be mapped to the single layer based on the single layer having the highest MCS, SNR, or both for the set of layers. The DCI message may be mapped to the single layer based on the single layer having the lowest index value for the set of layers.

[0112] In some implementations, the group of DCI messages is mapped to the single layer based on a comparison of a first payload size of the group of DCI messages mapped to the single layer and a second payload size of a downlink shared channel mapped to the single layer. In some cases, the MCS associated with the downlink shared channel for the single layer is the highest MCS for the downlink shared channel of the group of layers.

[0113] In some implementations, UE 115-b may identify multiple layers to map the group of DCI messages to the group of layers based on a comparison of a first payload size of the group of DCI messages and a second payload size of the downlink shared channel. In some cases, the MCS associated with the second payload size of the downlink shared channel is a highest MCS of the downlink shared channels of the group of layers.

[0114] In some implementations, UE 115-a may identify multiple layers in the group of layers to which the set of DCI messages is mapped, and, for each layer in the multiple layers, identify that a first number of DCI messages in the set of DCI messages mapped to the layer differs by no more than one from a second number of DCI messages in the set of DCI messages mapped to any other layer in the multiple layers. In some cases, the first number of DCI messages is the same number for each layer in the multiple layers. In some cases, the first number of DCI messages for the layer is a different number from the second number of DCI messages for at least one other layer in the multiple layers. In some cases, the first number of DCI messages includes a first portion of a second DCI message, and the second number of DCI messages includes a second portion of the second DCI message.

[0115] At 720, UE 115-b may receive the set of DCI messages on one or more layers of the downlink shared channel based on the identified configuration. In some cases, the set of DCI messages are concatenated on one or more layers.

[0116] Figure 8 A block diagram 800 of a device 805 supporting a layer mapping method for a piggybacked DCI according to aspects of the present disclosure is shown. The device 805 may be an example of aspects of a UE 115 as described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 820. The device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0117] The receiver 810 may receive information associated with various information channels (e.g., control channels, data channels, and information related to a layer mapping method of a DCI carried, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 805. The receiver 810 may be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The receiver 810 may utilize a single antenna or a group of antennas.

[0118] The communication manager 815 may receive a first DCI message in a downlink control channel that schedules a first resource of a downlink shared channel for a group of DCI messages, identify a configuration for receiving the group of DCI messages on one or more layers of a group of layers of the downlink shared channel based on the first DCI message, and receive the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein.

[0119] The communication manager 815 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 functions of the communication manager 815 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 functions described in the present disclosure.

[0120] The communication manager 815 or its subcomponents can be physically located in various locations, including being distributed so that portions of the 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 815 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0121] The transmitter 820 can transmit signals generated by other components of the device 805. In some examples, the transmitter 820 can be collocated with the receiver 810 in a transceiver module. For example, the transmitter 820 can be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The transmitter 820 may utilize a single antenna or a group of antennas.

[0122] The communication manager 815 described herein may be implemented to achieve one or more potential advantages. One implementation may allow the device 805 to improve the piggyback configuration to support the UE to support multiple layers or codewords. For example, the device 805 may receive a configuration for receiving piggyback DCI on one or more layers of a downlink shared channel, wherein the configuration may reduce power consumption and DCI payload size.

[0123] Based on implementing the DCI configuration techniques described herein, the processor of UE 115 (e.g., as shown in FIG. Fig.11 As described above, controlling the receiver 810, the transmitter 820, or the transceiver 1120) can improve the efficiency of scheduling data in the downlink shared channel because control information can be received in one time slot at multiple layers.

[0124] Fig. 9A block diagram 900 of a device 905 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of the device 805 or UE 115 as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 935. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0125] The receiver 910 may receive information associated with various information channels (e.g., control channels, data channels, and information related to a layer mapping method of a DCI carried, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 905. The receiver 910 may be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The receiver 910 may utilize a single antenna or a group of antennas.

[0126] The communication manager 915 may be an example of aspects of the communication manager 815 as described herein. The communication manager 915 may include a first DCI message module 920, a DCI configuration identifier 925, and an onboard DCI message module 930. The communication manager 915 may be an example of aspects of the communication manager 1110 described herein.

[0127] The first DCI message module 920 may receive a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages. The DCI configuration identifier 925 may identify a configuration for receiving the group of DCI messages on one or more layers of a group of layers of a downlink shared channel based on the first DCI message. The onboard DCI message module 930 may receive the group of DCI messages on one or more layers of a downlink shared channel based on the identified configuration.

[0128] The transmitter 935 can transmit signals generated by other components of the device 905. In some examples, the transmitter 935 can be collocated with the receiver 910 in the transceiver module. For example, the transmitter 935 can be a reference Fig.11 Examples of aspects of the transceiver 1120 are described. The transmitter 935 may utilize a single antenna or a group of antennas.

[0129] Fig.10FIG. 1000 is a block diagram of a communication manager 1005 supporting a layer mapping method for carried DCI in accordance with aspects of the present disclosure. The communication manager 1005 may be an example of aspects of the communication manager 815, communication manager 915, or communication manager 1110 described herein. The communication manager 1005 may include a first DCI message module 1010, a DCI configuration recognizer 1015, and a carried DCI message module 1020. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0130] The first DCI message module 1010 may receive a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a set of DCI messages. The DCI configuration recognizer 1015 may identify a configuration for receiving the set of DCI messages on one or more layers of a set of layers of the downlink shared channel based on the first DCI message. The carried DCI message module 1020 may receive the set of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[0131] In some examples, the DCI configuration recognizer 1015 may identify that the set of DCI messages is mapped to a single layer of the set of layers, where the one or more layers include the single layer. In some cases, the set of DCI messages is mapped to the single layer based on the single layer having the highest MCS of the set of layers. In some cases, the set of DCI messages is mapped to the single layer based on the single layer having the highest SNR for the set of layers. In some cases, the set of DCI messages is mapped to the single layer based on the single layer having the lowest index value for the set of layers.

[0132] In some examples, the DCI configuration recognizer 1015 may identify a ratio of a first payload size of the set of DCI messages mapped to a single layer to a second payload size of the downlink shared channel mapped to the single layer. In some examples, the DCI configuration recognizer 1015 may determine that the ratio does not meet a threshold, where based on the determination, the set of DCI messages is mapped to the single layer. In some cases, the MCS associated with the downlink shared channel for the single layer is the highest MCS of the downlink shared channel for the set of layers.

[0133] In some examples, the DCI configuration identifier 1015 may identify a ratio of a first payload size of the group of DCI messages mapped to a single layer in the group of layers to a second payload size of a downlink shared channel mapped to the single layer. In some examples, the DCI configuration identifier 1015 may determine that the ratio satisfies a threshold, wherein based on the determination, the group of DCI messages is mapped to multiple layers in the group of layers. In some cases, the group of DCI messages is mapped to the single layer based on the single layer having the highest MCS of the group of layers.

[0134] In some examples, the DCI configuration identifier 1015 may identify that the set of DCI messages is mapped to multiple layers in the set of layers. In some examples, for each layer in the multiple layers, the DCI configuration identifier 1015 may identify that a first number of DCI messages in the set of DCI messages mapped to the layer differs by no more than one from a second number of DCI messages in the set of DCI messages mapped to any other layer in the multiple layers.

[0135] In some cases, the first number of DCI messages is the same number for each layer in the multiple layers. In some cases, the first number of DCI messages for the layer is a different number than the second number of DCI messages for at least one other layer in the multiple layers. In some cases, the first number of DCI messages includes a first portion of a second DCI message and the second number of DCI messages includes a second portion of the second DCI message. In some cases, the set of DCI messages is cascaded on one or more layers.

[0136] Fig.11 A schematic diagram of a system 1100 including a device 1105 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown. The device 1105 may be an example of, or include, components of the device 805, device 905, or UE 115 described herein. The device 1105 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1110, an I / O controller 1115, a transceiver 1120, an antenna 1125, a memory 1130, and a processor 1140. These components may be in electrical communication via one or more buses (e.g., bus 1145).

[0137] The communication manager 1110 can receive a first DCI message in a downlink control channel, which first DCI message schedules a first resource of a downlink shared channel for a group of DCI messages, identify a configuration for receiving the group of DCI messages on one or more layers of a group of layers of the downlink shared channel based on the first DCI message, and receive the group of DCI messages on one or more layers of the downlink shared channel based on the identified configuration.

[0138] I / O controller 1115 can manage input and output signals for device 1105. I / O controller 1115 can also manage peripheral devices that are not integrated into device 1105. In some cases, I / O controller 1115 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1115 can utilize an operating system, such as Or other known operating systems. In other cases, I / O controller 1115 can represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 1115 can be implemented as part of a processor. In some cases, a user can interact with device 1105 via I / O controller 1115 or via hardware components controlled by I / O controller 1115.

[0139] As described above, the transceiver 1120 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, the transceiver 1120 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1120 can also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0140] In some cases, a wireless device may include a single antenna 1125. However, in some cases, a device may have more than one antenna 1125 that is capable of sending or receiving multiple wireless transmissions simultaneously.

[0141] The memory 1130 may include random access memory (RAM) and read-only memory (ROM). The memory 1130 may store computer-readable, computer-executable code 1135, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 1130 may contain, among other things, a basic I / O system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0142] Processor 1140 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, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1140 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 1140. Processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) so that device 1105 performs various functions (e.g., functions or tasks of a layer mapping method supporting an onboard DCI).

[0143] The code 1135 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1135 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1135 may not be directly executed by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0144] Fig.12 A block diagram 1200 of a device 1205 supporting a layer mapping method for a piggybacked DCI according to aspects of the present disclosure is shown. The device 1205 may be an example of aspects of a base station 105 as described herein. The device 1205 may include a receiver 1210, a communication manager 1215, and a transmitter 1220. The device 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0145] The receiver 1210 may receive information associated with various information channels (e.g., control channels, data channels, and information related to a layer mapping method of a DCI carried, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1205. The receiver 1210 may be a reference Fig.15 Examples of aspects of the transceiver 1520 are described. The receiver 1210 may utilize a single antenna or a group of antennas.

[0146] The communication manager 1215 may identify a configuration for a UE to receive a group of DCI messages on one or more layers of a group of layers of a downlink shared channel, send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the group of DCI messages, and send the group of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration. The communication manager 1215 may be an example of aspects of the communication manager 1510 described herein.

[0147] The communication manager 1215 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 functions of the communication manager 1215 or its subcomponents may be performed by a general purpose processor, DSP, ASIC, FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0148] The communication manager 1215 or its subcomponents can be physically located in various locations, including being distributed so that portions of the 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 1215 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1215 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0149] Transmitter 1220 can transmit signals generated by other components of device 1205. In some examples, transmitter 1220 can be co-located with receiver 1210 in a transceiver module. For example, transmitter 1220 can be a reference Fig.15 Examples of aspects of the transceiver 1520 are described. The transmitter 1220 may utilize a single antenna or a group of antennas.

[0150] Fig.13 A block diagram 1300 of a device 1305 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown. The device 1305 may be an example of aspects of the device 1205 or base station 105 as described herein. The device 1305 may include a receiver 1310, a communication manager 1315, and a transmitter 1335. The device 1305 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0151] The receiver 1310 may receive information associated with various information channels (e.g., control channels, data channels, and information related to a layer mapping method of a DCI carried, etc.), such as packets, user data, or control information. The information may be delivered to other components of the device 1305. The receiver 1310 may be a reference Fig.15 Examples of aspects of transceiver 1520 are described. Receiver 1310 may utilize a single antenna or a group of antennas.

[0152] The communication manager 1315 may be an example of aspects of the communication manager 1215 as described herein. The communication manager 1315 may include a DCI configuration manager 1320, a first DCI message manager 1325, and a piggybacked DCI message manager 1330. The communication manager 1315 may be an example of aspects of the communication manager 1510 described herein.

[0153] The DCI configuration manager 1320 may identify, for the UE, a configuration for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. The first DCI message manager 1325 may send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the set of DCI messages. The onboard DCI message manager 1330 may send the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0154] Transmitter 1335 can transmit signals generated by other components of device 1305. In some examples, transmitter 1335 can be co-located with receiver 1310 in a transceiver module. For example, transmitter 1335 can be a reference Fig.15 Examples of aspects of the transceiver 1520 are described. The transmitter 1335 may utilize a single antenna or a group of antennas.

[0155] Fig.14 A block diagram 1400 of a communication manager 1405 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown. The communication manager 1405 may be an example of aspects of the communication manager 1215, the communication manager 1315, or the communication manager 1510 described herein. The communication manager 1405 may include a DCI configuration manager 1410, a first DCI message manager 1415, a piggybacked DCI message manager 1420, a DCI mapping manager 1425, and a payload comparison manager 1430. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0156] The DCI configuration manager 1410 may identify, for a UE, a configuration for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. A first DCI message manager 1415 may send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the set of DCI messages. An onboard DCI message manager 1420 may send the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0157] The DCI mapping manager 1425 may map the group of DCI messages to a single layer, where the group of DCI messages are transmitted on the single layer. In some cases, the group of DCI messages is mapped to the single layer based on the single layer having the highest MCS for the group of layers. In some cases, the group of DCI messages is mapped to the single layer based on the single layer having the highest SNR for the group of layers. In some cases, the group of DCI messages is mapped to the single layer based on the single layer having the lowest index value for the group of layers.

[0158] The payload comparison manager 1430 may compare a first payload size of the group of DCI messages on a single layer in the group of layers with a second payload size of a downlink shared channel on the single layer. In some examples, the DCI mapping manager 1425 may map the group of DCI messages to a single layer based on the result of the comparison, wherein the group of DCI messages are transmitted on the single layer. In some cases, the MCS associated with the downlink shared channel for the single layer is the highest MCS for the downlink shared channel for the group of layers.

[0159] In some examples, payload comparison manager 1430 may compare the first payload size of the group of DCI messages with a second payload size of the downlink shared channel. In some examples, DCI mapping manager 1425 may map the group of DCI messages to multiple layers based on the result of the comparison, wherein the group of DCI messages are transmitted over the multiple layers. In some cases, the MCS of the downlink shared channel associated with the second payload size is the highest MCS of the downlink shared channel for the group of layers.

[0160] In some examples, the DCI mapping manager 1425 may map the group of DCI messages to multiple layers over which the group of DCI messages are transmitted, wherein, for each layer in the multiple layers, a first number of DCI messages in the group of DCI messages mapped to that layer differs by no more than one from a second number of DCI messages in the group of DCI messages mapped to any other layer in the multiple layers.

[0161] In some cases, the first number of DCI messages is the same number for each layer in the multiple layers. In some cases, the first number of DCI messages for the layer is a different number than the second number of DCI messages for at least one other layer in the multiple layers. In some cases, the first number of DCI messages includes a first portion of a second DCI message and the second number of DCI messages includes a second portion of the second DCI message. In some cases, the set of DCI messages is cascaded on one or more layers.

[0162] Fig.15A schematic diagram of a system 1500 including a device 1505 supporting a layer mapping method for piggybacked DCI according to aspects of the present disclosure is shown. The device 1505 may be an example of, or include components of, the device 1205, device 1305, or base station 105 described herein. The device 1505 may include components for two-way voice and data communications, including components for sending and receiving communications, including a communications manager 1510, a network communications manager 1515, a transceiver 1520, an antenna 1525, a memory 1530, a processor 1540, and an inter-station communications manager 1545. These components may be in electrical communication via one or more buses (e.g., bus 1550).

[0163] The communication manager 1510 can identify a configuration for the UE to receive a group of DCI messages on one or more layers of a group of layers of a downlink shared channel, send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of the downlink shared channel for the group of DCI messages, and send the group of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration.

[0164] The network communications manager 1515 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1515 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0165] As described above, transceiver 1520 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 1520 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1520 can also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0166] In some cases, a wireless device may include a single antenna 1525. However, in some cases, the device may have more than one antenna 1525, which may be capable of sending or receiving multiple wireless transmissions simultaneously.

[0167] The memory 1530 may include RAM, ROM, or a combination thereof. The memory 1530 may store computer readable code 1535 including instructions that, when executed by a processor (e.g., processor 1540), cause the device to perform various functions described herein. In some cases, among other things, the memory 1530 may contain a BIOS, etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0168] Processor 1540 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, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1540 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1540. Processor 1540 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1530) so that device 1505 performs various functions (e.g., functions or tasks of a layer mapping method supporting an onboard DCI).

[0169] The inter-site communication manager 1545 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with the UE 115 in cooperation with the other base stations 105. For example, the inter-site communication manager 1545 may coordinate the scheduling of transmissions to the UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-site communication manager 1545 may provide an X2 interface in an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0170] The code 1535 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1535 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1535 may not be directly executed by the processor 1540, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0171] Fig.16 A flow chart illustrating a method 1600 for layer mapping of DCI supporting piggybacking according to aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1600 may be implemented by reference to Figures 8 to 11 In some examples, the UE may execute a set of instructions 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.

[0172] At 1605, the UE may receive a first DCI message in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for a group of DCI messages. 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 by reference to Figures 8 to 11 The first DCI message module described is executed.

[0173] At 1610, the UE may identify, based on the first DCI message, a configuration for receiving the set of DCI messages on one or more layers of a set of layers of a downlink shared channel. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be described with reference to Figures 8 to 11 The DCI configuration identifier described is performed.

[0174] At 1615, the UE may receive the set of DCI messages on one or more layers of the downlink shared channel based on the identified configuration. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be described with reference to Figures 8 to 11 The described onboard DCI message module is used to perform.

[0175] Fig.17 A flow chart illustrating a method 1700 for layer mapping of DCI supporting piggybacking according to aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1700 may be implemented by reference to Figures 12 to 15 In some examples, the base station may execute a set of instructions 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.

[0176] At 1705, the base station may identify, for the UE, a configuration for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. 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 12 to 15 Describes the DCI configuration manager to perform.

[0177] At 1710, the base station may send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for the group of DCI messages. 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 by reference to Figures 12 to 15 The first DCI message manager described is executed.

[0178] At 1715, the base station may send the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be described with reference to Figures 12 to 15 The described onboard DCI message manager is used to perform the above operations.

[0179] Fig.18 A flow chart illustrating a method 1800 for layer mapping of DCI supporting piggybacking according to aspects of the present disclosure is shown. The operations of the method 1800 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1800 may be implemented by reference to Figures 12 to 15 In some examples, the base station may execute a set of instructions 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.

[0180] At 1805, the base station may compare a first payload size of the group of DCI messages on a single layer in the group of layers with a second payload size of a downlink shared channel on the single layer. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be described with reference to Figures 12 to 15 Describes the payload comparison manager to perform.

[0181] At 1810, the base station may map the group of DCI messages to a single layer based on the result of the comparison, wherein the group of DCI messages are transmitted on the single layer. The operation of 1810 may be performed according to the method described herein. In some examples, various aspects of the operation of 1810 may be described with reference to Figures 12 to 15 The DCI mapping manager described here is used to perform the above operations.

[0182] At 1815, the base station may identify, for the UE, a configuration for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. The operations of 1815 may be performed according to the methods described herein. In some examples, aspects of the operations of 1815 may be described with reference to Figures 12 to 15 Describes the DCI configuration manager to perform.

[0183] At 1820, the base station may send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for the group of DCI messages. The operations of 1820 may be performed according to the methods described herein. In some examples, aspects of the operations of 1820 may be described by reference to Figures 12 to 15 The first DCI message manager described is executed.

[0184] At 1825, the base station may send the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration. The operations of 1825 may be performed according to the methods described herein. In some examples, aspects of the operations of 1825 may be described with reference to Figures 12 to 15 The described onboard DCI message manager is used to perform the above operations.

[0185] Fig.19 A flow chart illustrating a method 1900 for layer mapping of DCI supporting piggybacking according to aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1900 may be implemented by reference to Figures 12 to 15 In some examples, the base station may execute a set of instructions 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.

[0186] At 1905, the base station may compare the first payload size of the group of DCI messages with the second payload size of the downlink shared channel. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be described with reference to Figures 12 to 15 Describes the payload comparison manager to perform.

[0187] At 1910, the base station may map the group of DCI messages to multiple layers based on the result of the comparison, wherein the group of DCI messages are transmitted on the multiple layers. The operation of 1910 may be performed according to the method described herein. In some examples, various aspects of the operation of 1910 may be described with reference to Figures 12 to 15 The DCI mapping manager described here is used to perform the above operations.

[0188] At 1915, the base station may identify, for the UE, a configuration for receiving a set of DCI messages on one or more layers of a set of layers of a downlink shared channel. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be described with reference to Figures 12 to 15 Describes the DCI configuration manager to perform.

[0189] At 1920, the base station may send a first DCI message to the UE in a downlink control channel, the first DCI message scheduling a first resource of a downlink shared channel for the group of DCI messages. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be described with reference to Figures 12 to 15 The first DCI message manager described is executed.

[0190] At 1925, the base station may send the set of DCI messages to the UE on one or more layers of the downlink shared channel based on the identified configuration. The operations of 1925 may be performed according to the methods described herein. In some examples, aspects of the operations of 1925 may be described with reference to Figures 12 to 15 The described onboard DCI message manager is used to perform the above operations.

[0191] The following provides an overview of various aspects of the present disclosure:

[0192] Aspect 1: A method for wireless communication at a UE, comprising: receiving a first downlink control information message in a downlink control channel, the first downlink control information message scheduling a first resource of a downlink shared channel for a group of downlink control information messages; identifying a configuration for receiving the group of downlink control information messages on one or more layers of multiple layers of a downlink shared channel based at least in part on the first downlink control information message; and receiving the group of downlink control information messages on one or more layers of the downlink shared channel based at least in part on the identified configuration.

[0193] Aspect 2: The method according to aspect 1, wherein identifying the configuration comprises: identifying that the group of downlink control information messages is mapped to a single layer among the multiple layers, wherein the one or more layers include the single layer.

[0194] Aspect 3: A method according to Aspect 2, wherein the group of downlink control information messages is mapped to the single layer at least in part based on the single layer having the highest modulation and coding scheme for the multiple layers, the highest signal-to-noise ratio for the multiple layers, the lowest index value for the multiple layers, or any combination thereof.

[0195] Aspect 4: The method according to any one of Aspects 2 to 3 further includes: identifying a ratio of a first payload size of the group of downlink control information messages mapped to the single layer to a second payload size of a downlink shared channel mapped to the single layer; and determining that the ratio fails to meet a threshold, wherein the group of downlink control information messages is mapped to the single layer at least in part based on the determination.

[0196] Aspect 5: The method according to aspect 4, wherein the modulation and coding scheme associated with the downlink shared channel for the single layer is the highest modulation and coding scheme for the downlink shared channels of the multiple layers.

[0197] Aspect 6: A method according to any one of Aspects 1 to 5, wherein identifying the configuration includes: identifying a ratio of a first payload size of the group of downlink control information messages mapped to a single layer among the multiple layers to a second payload size of a downlink shared channel mapped to the single layer; and determining that the ratio satisfies a threshold, wherein based at least in part on the determination, the group of downlink control information messages is mapped to multiple layers among the multiple layers.

[0198] Aspect 7: The method according to aspect 6, wherein the modulation and coding scheme associated with the second payload size of the downlink shared channel is a highest modulation and coding scheme used for the downlink shared channels of the multiple layers.

[0199] Aspect 8: A method according to any one of Aspects 1 to 7, wherein identifying the configuration includes: identifying that the group of downlink control information messages is mapped to multiple layers of the multiple layers; and for each layer of the multiple layers, identifying that a first number of downlink control information messages in the group of downlink control information messages mapped to the layer differs by no more than one from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer of the multiple layers.

[0200] Aspect 9: The method according to aspect 8, wherein the first number of downlink control information messages is the same number for each of the multiple layers.

[0201] Aspect 10: A method according to any one of Aspects 8 to 9, wherein the first number of the downlink control information messages used for the layer is a different number from the second number of the downlink control information messages used for at least one other layer in the multiple layers.

[0202] Aspect 11: A method according to any one of Aspects 8 to 10, wherein the first number of downlink control information messages includes the first part of the second downlink control information message, and the second number of downlink control information messages includes the second part of the second downlink control information message.

[0203] Aspect 12: The method according to any one of aspects 1 to 11, wherein the group of downlink control information messages is concatenated on one or more layers.

[0204] Aspect 13: A method for wireless communication at a base station, comprising: identifying a configuration for a UE to receive a group of downlink control information messages on one or more layers of multiple layers of a downlink shared channel; sending a first downlink control information message to the UE in the downlink control channel, the first downlink control information message scheduling a first resource of the downlink shared channel for the group of downlink control information messages; and sending the group of downlink control information messages to the UE on one or more layers of the downlink shared channel based at least in part on the identified configuration.

[0205] Aspect 14: The method according to Aspect 13 further includes: mapping the group of downlink control information messages to a single layer, wherein the group of downlink control information messages are transmitted on the single layer.

[0206] Aspect 15: A method according to Aspect 14, wherein the group of downlink control information messages is mapped to the single layer at least in part based on the single layer having the highest modulation and coding scheme for the multiple layers, the highest signal-to-noise ratio for the multiple layers, the lowest index value for the multiple layers, or any combination thereof.

[0207] Aspect 16: The method according to any one of Aspects 13 to 15 further includes: comparing a first payload size of the group of downlink control information messages on a single layer among the multiple layers with a second payload size of a downlink shared channel on the single layer; and mapping the group of downlink control information messages to the single layer based at least in part on the result of the comparison, wherein the group of downlink control information messages is transmitted on the single layer.

[0208] Aspect 17: The method according to aspect 16, wherein the modulation and coding scheme associated with the downlink shared channel for the single layer is the highest modulation and coding scheme for the downlink shared channels of the multiple layers.

[0209] Aspect 18: The method according to any one of Aspects 13 to 17 further includes: comparing the first payload size of the group of downlink control information messages with the second payload size of the downlink shared channel; and mapping the group of downlink control information messages to multiple layers based at least in part on the result of the comparison, wherein the group of downlink control information messages is transmitted on the multiple layers.

[0210] Aspect 19: The method according to aspect 18, wherein the modulation and coding scheme associated with the second payload size of the downlink shared channel is a highest modulation and coding scheme used for the downlink shared channels of the multiple layers.

[0211] Aspect 20: The method according to any one of Aspects 13 to 19 further includes: mapping the group of downlink control information messages to multiple layers, and the group of downlink control information messages are transmitted on the multiple layers, wherein, for each layer in the multiple layers, a first number of downlink control information messages in the group of downlink control information messages mapped to the layer differs from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer in the multiple layers by no more than one.

[0212] Aspect 21: The method according to Aspect 20, wherein the first number of downlink control information messages is the same number for each of the multiple layers.

[0213] Aspect 22: A method according to any one of Aspects 20 to 21, wherein the first number of the downlink control information messages used for the layer is a different number from the second number of the downlink control information messages used for at least one other layer in the multiple layers.

[0214] Aspect 23: A method according to any one of Aspects 20 to 22, wherein the first number of downlink control information messages includes the first part of the second downlink control information message, and the second number of downlink control information messages includes the second part of the second downlink control information message.

[0215] Aspect 24: The method according to any one of aspects 13 to 23, wherein the set of downlink control information messages is concatenated on one or more layers.

[0216] Aspect 25: An apparatus for wireless communication at a UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 12.

[0217] Aspect 26: An apparatus for wireless communication at a UE, comprising at least one component for performing the method of any one of aspects 1 to 12.

[0218] Aspect 27: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 12.

[0219] Aspect 28: An apparatus for wireless communication at a base station, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of Aspects 13 to 24.

[0220] Aspect 29: An apparatus for wireless communication at a base station, comprising at least one component for performing the method of any one of aspects 13 to 24.

[0221] Aspect 30: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any one of aspects 13 to 24.

[0222] It should be noted that the methods described herein describe possible implementations, and the operations and steps may be rearranged or modified, and other implementations are possible. Furthermore, aspects of two or more methods may be combined.

[0223] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in 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 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.

[0224] The information and signals described herein may be represented using any of a variety of techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips cited throughout the specification may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0225] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed with a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, 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, a combination of one or more microprocessors and a DSP core, or any other such configuration).

[0226] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored or transmitted as one or more instructions or codes on a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented in different physical locations.

[0227] Computer-readable media include non-temporary computer storage media and communication media, including any media that facilitates the transport of computer programs from one place to another. Non-temporary storage media can be any available media that can be accessed by a general or special computer. As an example and not limitation, non-temporary computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage devices, disk storage devices or other magnetic storage devices, or can be used to carry or store desired program code devices in the form of instructions or data structures and can be accessed by a general or special computer or a general or special processor. Any other non-temporary medium. Similarly, any connection is properly referred to as a computer-readable medium. For example, if a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwaves are used to transmit software from a website, server or other remote source, coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwaves are included in the definition of computer-readable media. Disk and disc, as used herein, includes CD, laser disc, optical disc, digital versatile disc (DVD), floppy disc and Blu-ray disc where discs 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.

[0228] As used herein, including in the claims, "or" used in a list of items (e.g., a list of items beginning with a phrase such as "at least one" or "one or more") 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). In addition, as used herein, the phrase "based on" should not be interpreted as referring 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."

[0229] In the drawings, similar parts or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label, the second label being used to distinguish similar components. If only the first reference label is used in the specification, the description applies to any one similar component having the same first reference label, regardless of the second reference label or other subsequent reference labels.

[0230] 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 "used 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 technology. However, these technologies may be implemented without these specific details. In some cases, known structures and devices are illustrated in block diagram form to avoid obscuring the concepts of the described examples.

[0231] The description provided here is to enable those 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 conforms to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment UE, include: Receiving a first downlink control information message piggybacked in a downlink control channel, the first downlink control information message piggybacked scheduling a first resource of a downlink shared channel for a group of downlink control information messages, wherein the group of downlink control information messages is used to indicate downlink data transmission in one or more time slots after a time slot corresponding to the downlink control channel; identifying, based at least in part on the piggybacked first downlink control information message, a configuration for receiving the set of downlink control information messages on one or more of a plurality of layers of the downlink shared channel; and Based at least in part on the identified configuration, the set of downlink control information messages is received on the one or more layers of the downlink shared channel.

2. The method according to claim 1, in, Identifying the configuration includes: Identifying that the set of downlink control information messages maps to a single layer among the plurality of layers, wherein the one or more layers include the single layer.

3. The method according to claim 2, in, The group of downlink control information messages is mapped to the single layer based at least in part on the single layer having a highest modulation and coding scheme for the multiple layers, a highest signal-to-noise ratio for the multiple layers, a lowest index value for the multiple layers, or any combination thereof.

4. The method according to claim 2, further comprising: include: identifying a ratio of a first payload size of the set of downlink control information messages mapped to the single layer to a second payload size of the downlink shared channel mapped to the single layer; as well as A determination is made that the ratio fails to satisfy a threshold, wherein based at least in part on the determination, the set of downlink control information messages is mapped to the single layer.

5. The method according to claim 4, in, The modulation and coding scheme associated with the downlink shared channel for the single layer is a highest modulation and coding scheme for the downlink shared channel for the multiple layers.

6. The method according to claim 1, in, Identifying the configuration includes: identifying a ratio of a first payload size of the set of downlink control information messages mapped to a single layer of the plurality of layers to a second payload size of the downlink shared channel mapped to the single layer; and A determination is made that the ratio satisfies a threshold, wherein based at least in part on the determination, the set of downlink control information messages is mapped to multiple layers of the plurality of layers.

7. The method according to claim 6, in, The modulation and coding scheme associated with the second payload size of the downlink shared channel is a highest modulation and coding scheme used for the downlink shared channel of the plurality of layers.

8. The method according to claim 1, in, Identifying the configuration includes: identifying multiple layers of the plurality of layers to which the set of downlink control information messages are mapped; and For each layer in the multiple layers, a first number of downlink control information messages in the group of downlink control information messages mapped to the layer is identified as differing by no more than one from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer in the multiple layers.

9. The method according to claim 8, in, The first number of downlink control information messages is the same number for each of the multiple layers.

10. The method according to claim 8, in, A first number of the downlink control information messages for the layer is a different number from a second number of the downlink control information messages for at least one other layer of the multiple layers.

11. The method according to claim 8, in, The first number of downlink control information messages includes a first portion of a second downlink control information message, and the second number of downlink control information messages includes a second portion of the second downlink control information message.

12. The method according to claim 1, in, The set of downlink control information messages is concatenated on the one or more layers.

13. A method for wireless communication at a base station, include: identifying, for a user equipment UE, a configuration for receiving a set of downlink control information messages on one or more layers of a plurality of layers of a downlink shared channel; sending a first piggybacked downlink control information message to the UE in a downlink control channel, the first piggybacked downlink control information message scheduling a first resource of the downlink shared channel for the group of downlink control information messages, wherein the group of downlink control information messages is used to indicate downlink data transmission in one or more time slots after the time slot corresponding to the downlink control channel; and Based at least in part on the identified configuration, the set of downlink control information messages is sent to the UE on the one or more layers of the downlink shared channel.

14. The method according to claim 13, further comprising: include: The set of downlink control information messages is mapped to a single layer, wherein the set of downlink control information messages is transmitted on the single layer.

15. The method according to claim 14, in, The group of downlink control information messages is mapped to the single layer based at least in part on the single layer having a highest modulation and coding scheme for the multiple layers, a highest signal-to-noise ratio for the multiple layers, a lowest index value for the multiple layers, or any combination thereof.

16. The method according to claim 13, further comprising: include: comparing a first payload size of the set of downlink control information messages on a single layer of the plurality of layers with a second payload size of the downlink shared channel on the single layer; as well as Based at least in part on a result of the comparing, the set of downlink control information messages is mapped to the single layer on which the set of downlink control information messages are transmitted.

17. The method according to claim 16, in, The modulation and coding scheme associated with the downlink shared channel for the single layer is a highest modulation and coding scheme for the downlink shared channel for the multiple layers.

18. The method according to claim 13, further comprising: include: comparing a first payload size of the set of downlink control information messages with a second payload size of the downlink shared channel; as well as Based at least in part on a result of the comparing, the set of downlink control information messages is mapped to multiple layers over which the set of downlink control information messages are transmitted.

19. The method according to claim 18, in, The modulation and coding scheme associated with the second payload size of the downlink shared channel is a highest modulation and coding scheme used for the downlink shared channel of the plurality of layers.

20. The method according to claim 13, further comprising: include: The group of downlink control information messages is mapped to multiple layers, and the group of downlink control information messages is transmitted on the multiple layers, wherein, for each layer in the multiple layers, a first number of downlink control information messages in the group of downlink control information messages mapped to the layer differs by no more than one from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer in the multiple layers.

21. The method according to claim 20, in, The first number of downlink control information messages is the same number for each of the multiple layers.

22. The method according to claim 20, in, A first number of the downlink control information messages for the layer is a different number from a second number of the downlink control information messages for at least one other layer of the multiple layers.

23. The method according to claim 20, in, The first number of downlink control information messages includes a first portion of a second downlink control information message, and the second number of downlink control information messages includes a second portion of the second downlink control information message.

24. The method according to claim 13, in, The set of downlink control information messages is concatenated on the one or more layers.

25. An apparatus for wireless communication at a user equipment UE, include: processor, a memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor cause the apparatus to: Receiving a first downlink control information message piggybacked in a downlink control channel, the first downlink control information message piggybacked scheduling a first resource of a downlink shared channel for a group of downlink control information messages, wherein the group of downlink control information messages is used to indicate downlink data transmission in one or more time slots after a time slot corresponding to the downlink control channel; identifying, based at least in part on the piggybacked first downlink control information message, a configuration for receiving the set of downlink control information messages on one or more of a plurality of layers of the downlink shared channel; and Based at least in part on the identified configuration, the set of downlink control information messages is received on the one or more layers of the downlink shared channel.

26. The device according to claim 25, in, The instructions for identifying the configuration are executable by the processor to cause the apparatus to: Identifying that the set of downlink control information messages maps to a single layer among the plurality of layers, wherein the one or more layers include the single layer.

27. The device according to claim 25, in, The instructions for identifying the configuration are executable by the processor to cause the apparatus to: identifying multiple layers of the plurality of layers to which the set of downlink control information messages are mapped; as well as For each layer in the multiple layers, identify that a first number of downlink control information messages in the group of downlink control information messages mapped to the layer differs by no more than one from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer in the multiple layers.

28. An apparatus for wireless communication at a base station, include: processor, a memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor cause the apparatus to: identifying, for a user equipment UE, a configuration for receiving a set of downlink control information messages on one or more layers of a plurality of layers of a downlink shared channel; sending a first piggybacked downlink control information message to the UE in a downlink control channel, the first piggybacked downlink control information message scheduling a first resource of the downlink shared channel for the group of downlink control information messages, wherein the group of downlink control information messages is used to indicate downlink data transmission in one or more time slots after the time slot corresponding to the downlink control channel; and Based at least in part on the identified configuration, the set of downlink control information messages is sent to the UE on the one or more layers of the downlink shared channel.

29. The device according to claim 28, in, The instructions are further executable by the processor to cause the device to: The set of downlink control information messages is mapped to a single layer of the plurality of layers, wherein the one or more layers include the single layer.

30. The device according to claim 28, in, The instructions for identifying the configuration are executable by the processor to cause the apparatus to: The group of downlink control information messages is mapped to multiple layers, and the group of downlink control information messages is transmitted on the multiple layers, wherein, for each layer in the multiple layers, a first number of downlink control information messages in the group of downlink control information messages mapped to the layer differs by no more than one from a second number of downlink control information messages in the group of downlink control information messages mapped to any other layer in the multiple layers.

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