Enhanced hybrid automatic repeat request acknowledgement / negative acknowledgement configuration associated with initial physical downlink control channel communication

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive configuration information from a network node indicating an enhanced hybrid automatic repeat request (HARQ) acknowledgement / negative acknowledgement (ACK / NACK) configuration associated with an initial physical downlink control channel (PDCCH) communication. The UE may receive a retransmission of an initial PDCCH communication from a network node. The UE may identify a failure for the UE to receive the initial PDCCH communication. The UE may send, in association with the configuration information, enhanced HARQ ACK / NACK information to the network node indicating a failure of the UE to receive the initial PDCCH communication. Numerous other aspects are described.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. Patent Application No. 18 / 500,580, filed November 2, 2023, entitled “Enhanced Hybrid Automatic Repeat Request Acknowledgment / Negative Acknowledgment Configuration Assaulted with Initial Physical Downlink Control Channel Communications”, which has been assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] All aspects of this disclosure relate to wireless communication in general, and more particularly to techniques, apparatus and methods for an enhanced hybrid automatic repeat request acknowledgment / negative acknowledgment configuration associated with initial physical downlink control channel communication. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of services, including voice, text, messaging, video, data, and / or other services. Services may include unicast, multicast, and / or broadcast services, etc. Typical wireless communication systems employ multiple access radio access technologies (RATs) capable of supporting communication with multiple users by sharing available system resources (e.g., time-domain resources, frequency-domain resources, spatial-domain resources, and / or device transmit power, etc.). Examples of such multiple access RATs include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0005] The aforementioned Multiple Access RATs have been adopted in various telecommunications standards to provide a common protocol enabling different wireless communication devices to communicate at the city, national, regional, or global level. An example telecommunications standard is New Radio (NR). NR (also known as 5G) is part of the continuous evolution of mobile broadband announced by the 3rd Generation Partnership Project (3GPP). NR (and other mobile broadband evolutions beyond NR) can be designed to better support the Internet of Things (IoT) and reduced-capacity device deployments, industrial connectivity, millimeter-wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelinks and other device-to-device direct communication technologies (e.g., cellular vehicle-to-everything (CV2X) communications), massive MIMO, decomposed network architectures and network topology expansion, multi-subscriber implementations, high-precision positioning and / or radio frequency (RF) sensing, and more. As the demand for mobile broadband access continues to grow, further improvements to NR can be implemented, and other radio access technologies (such as 6G) can be introduced to further advance mobile broadband evolution. Summary of the Invention

[0006] Some aspects described herein relate to an apparatus for wireless communication at a User Equipment (UE). The apparatus may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured individually or jointly and at least in part, based on information stored in the one or more memories, to receive from a network node configuration information indicating an Enhanced Hybrid Automatic Repeat Request (HARQ) Acknowledgment / Negative Acknowledgment (ACK / NACK) configuration associated with an initial Physical Downlink Control Channel (PDCCH) communication. The one or more processors may be configured individually or jointly and at least in part, based on information stored in the one or more memories, to receive retransmissions of the initial PDCCH communication from a network node. The initial PDCCH communication may be a PDCCH communication carrying, for example, downlink resource grants. As used herein, the initial PDCCH communication may be a PDCCH communication transmitted using a modulation and decoding scheme (MCS) not reserved for retransmission of PDCCH communication and / or a PDCCH communication transmitted using an MCS reserved for retransmission of PDCCH communication that is not another PDCCH communication. One or more processors may be configured to identify the failure of the UE to receive initial PDCCH communication. One or more processors may be configured individually or jointly, and at least in part, based on information stored in one or more memories, to send enhanced HARQ ACK / NACK information to the network node in association with configuration information, indicating the failure of the UE to receive initial PDCCH communication.

[0007] Some aspects described herein relate to an apparatus for wireless communication at a network node. The apparatus may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured individually or jointly and at least partially based on information stored in the one or more memories to send configuration information to a UE indicating a modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. The one or more processors may be configured individually or jointly and at least partially based on information stored in the one or more memories to send the initial PDCCH communication to the UE. The one or more processors may be configured individually or jointly and at least partially based on information stored in the one or more memories to send a retransmission of the initial PDCCH communication to the UE. The one or more processors may be configured individually or jointly and at least partially based on information stored in the one or more memories to receive, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0008] Some aspects described herein relate to a method for wireless communication performed by a UE. This method may include the UE receiving configuration information from a network node indicating an enhanced HARQ ACK / NACK configuration associated with initial PDCCH communication. This method may include the UE receiving a retransmission of the initial PDCCH communication from the network node. This method may include the UE identifying a failure in receiving the initial PDCCH communication. This method may include the UE sending enhanced HARQ ACK / NACK information, in association with the configuration information, to the network node indicating a failure in receiving the initial PDCCH communication.

[0009] Some aspects described herein relate to a method for wireless communication performed by a network node. This method may include sending configuration information from the network node to the UE indicating that an MCS (Multi-Channel System) is reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. This method may include sending the initial PDCCH communication from the network node to the UE. This method may include sending a retransmission of the initial PDCCH communication from the network node to the UE. This method may include receiving, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0010] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions enables the UE to receive configuration information from a network node indicating an enhanced HARQ ACK / NACK configuration associated with an initial PDCCH communication. When executed by one or more processors of the UE, the set of instructions enables the UE to receive a retransmission of the initial PDCCH communication from the network node. When executed by one or more processors of the UE, the set of instructions enables the UE to identify a failure in receiving the initial PDCCH communication. When executed by one or more processors of the UE, the set of instructions enables the UE to send enhanced HARQ ACK / NACK information, associated with the configuration information, to the network node indicating a failure in receiving the initial PDCCH communication.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a network node. When executed by one or more processors of the network node, the set of instructions can cause the network node to send configuration information to the UE indicating that an MCS (Multi-Channel System) is reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. When executed by one or more processors of the network node, the set of instructions can cause the network node to send the initial PDCCH communication to the UE. When executed by one or more processors of the network node, the set of instructions can cause the network node to send a retransmission of the initial PDCCH communication to the UE. When executed by one or more processors of the network node, the set of instructions can cause the network node to receive, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0012] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for receiving configuration information from a network node indicating an enhanced HARQ ACK / NACK configuration associated with initial PDCCH communication. The apparatus may include components for receiving retransmissions of the initial PDCCH communication from the network node. The apparatus may include components for identifying a failure of the apparatus to receive the initial PDCCH communication. The apparatus may include components for sending, in association with the configuration information, enhanced HARQ ACK / NACK information to the network node indicating a failure of the apparatus to receive the initial PDCCH communication.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for transmitting configuration information to a UE indicating that an MCS (Multi-Channel System) is reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. The apparatus may include components for transmitting the initial PDCCH communication to the UE. The apparatus may include components for transmitting a retransmission of the initial PDCCH communication to the UE. The apparatus may include components for receiving, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0014] Various aspects of this disclosure may be implemented or be implemented as described in whole by or embodied in the methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network nodes, network entities, wireless communication devices and / or processing systems as fully described in the specification and drawings and illustrated in the specification and drawings.

[0015] The preceding paragraphs of this section have broadly summarized some aspects of this disclosure. These and additional aspects and their associated advantages will be described below. The disclosed aspects can serve as the basis for modifying or designing other aspects for performing the same or similar purposes of this disclosure. Such equivalent aspects do not depart from the scope of the appended claims. The characteristics of the aspects disclosed herein, their organization and operation, and their associated advantages will be better understood from the following description taken in conjunction with the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings illustrate some aspects of this disclosure but do not limit its scope, as other aspects can be achieved by this description. Each drawing in the drawings is provided for illustrative and descriptive purposes and not as a definition of limitation of the claims. Identical or similar reference numerals in different drawings may identify identical or similar elements.

[0017] Figure 1 This is a diagram illustrating an example of a wireless communication network according to the present disclosure.

[0018] Figure 2 This is a diagram illustrating an example network node communicating with an example user equipment (UE) in a wireless network according to the present disclosure.

[0019] Figure 3 This is a diagram illustrating an example decomposed base station architecture according to this disclosure.

[0020] Figure 4This is a diagram illustrating an example of an enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with initial physical downlink control channel (PDCCH) communication, in accordance with this disclosure.

[0021] Figure 5 This is a diagram illustrating an example process performed, for example, at the UE or a device of the UE, according to this disclosure.

[0022] Figure 6 This is a diagram illustrating an example process performed, for example, at a network node or a device of a network node, according to the present disclosure.

[0023] Figure 7 This is a diagram of an example device for wireless communication according to the present disclosure.

[0024] Figure 8 This is a diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0025] Various aspects of this disclosure are described below with reference to the accompanying drawings. However, aspects of this disclosure may be embodied in many different forms and should not be construed as limited to any specific aspect illustrated or described with reference to the drawings or otherwise presented in this disclosure. Rather, these aspects are provided to make this disclosure thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, various combinations or numbers of aspects set forth herein may be used to implement an apparatus or a method of practice. Furthermore, the scope of this disclosure is intended to cover apparatuses having structures and / or functions other than those available for practicing the various aspects of this disclosure set forth herein, or methods of practice using those other structures and / or functions. Any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0026] Various methods, operations, apparatuses, and techniques will now be presented with reference to them. These methods, operations, apparatuses, and techniques will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively, “elements”). These elements may be implemented using hardware, software, or a combination of hardware and software. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0027] In some cases, a user equipment (UE) specific beam can be used to transmit Physical Downlink Control Channel (PDCCH) communications. However, the UE may fail to receive the initial PDCCH communications. For example, in some cases, the UE may be monitoring a different beam, PDCCH MU-MIMO may be enabled, leading to interference associated with nearby UEs, and / or the network node may be transmitting PDCCH at an inappropriate aggregation level, etc. Failure of the UE to receive the initial PDCCH communications may result in an increased block error rate (BLER), mismatch between the on and off periods of Connection Mode Discontinuous Receive (C-DRX) associated with the UE and network node, and / or mismatch between the on and off periods of Active Bandwidth Partial (BWP) associated with the UE and network node, etc.

[0028] In some cases, if the UE loses the initial PDCCH communication, it may send an erroneous ACK feedback associated with the Hybrid Automatic Repeat Request (HARQ) Acknowledgment / Negative Acknowledgment (ACK / NACK) configuration upon receiving the first retransmission of the PDCCH communication. An erroneous ACK feedback may trigger a Radio Link Control (RLC) retransmission, which could result in increased latency. In some cases, when using adaptive retransmission, all lost initial transmissions will result in an erroneous ACK transmission from the UE because if the initial transmission is lost, the UE may be unable to decode any subsequent retransmissions. In these cases, the ACK can serve as an indication of early termination of the HARQ retransmission process. In some cases, the UE may lack a mechanism for quickly detecting and handling lost initial PDCCH communication.

[0029] Various aspects as a whole involve adaptive HARQ ACK / NACK configuration. Some aspects are more specifically related to enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. For example, in some aspects, an initial hard bit can be added to HARQ ACK / NACK communication to indicate a lost initial PDCCH. In some aspects, for example, the UE can indicate to the network node its ability to support enhanced HARQ ACK / NACK feedback. The network node can provide configuration information to enable enhanced HARQ ACK / NACK feedback (e.g., Radio Resource Control (RRC) reconfiguration). In some cases, configuration information can be provided based on the activation of radio frequency (RF) conditions and / or MU-MIMO operating modes (and / or one or more of their characteristics). The UE can identify the failure of receiving (e.g., detecting and / or decoding) the initial PDCCH communication based on receiving retransmissions associated with a reserved modulation and decoding scheme (MCS) for retransmission. In association with the failure to receive the initial PDCCH communication, the UE may send an enhanced HARQ ACK / NACK message indicating the failure. In response to receiving the enhanced HARQ ACK / NACK message, the network node may use an MCS not reserved for retransmission to send additional initial PDCCH communication.

[0030] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, by providing an enhanced HARQ ACK / NACK configuration, the described techniques can be used to perform adaptive retransmission operations, enabling the network to avoid HARQ process failures and RLC retransmissions, which can result in reduced latency and power consumption at the UE. In some examples, by adjusting the enhanced HARQ ACK / NACK configuration according to RF conditions and / or MU-MIMO operation, the described techniques enable network nodes to configure legacy HARQ ACK / NACK configurations in association with other conditions, thereby reducing the overhead associated with the enhanced HARQ ACK / NACK configuration. In some examples, by identifying failures in receiving initial PDCCH communication based on the retransmitted MCS, the described techniques can facilitate early detection of lost PDCCH transmissions, thereby reducing the number of retransmissions that the UE cannot decode, which can result in reduced signaling overhead and latency.

[0031] Multiple access radio access technology (RAT) has been adopted in various telecommunications standards to provide a common protocol that enables wireless communication devices to communicate at the city, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of the continuous mobile broadband evolution announced by the 3rd Generation Partnership Project (3GPP). 5G NR supports a variety of technologies and use cases, including enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine-type communication (mMTC), millimeter wave (mmWave) technology, beamforming, network slicing, edge computing, Internet of Things (IoT) connectivity and management, and network function virtualization (NFV).

[0032] As the demand for broadband access increases and as the technologies supported by wireless communication networks evolve, further technological improvements can be adopted or implemented in 5G NR or future RATs (such as 6G) to further advance the evolution of wireless communication for a variety of existing and new use cases and applications. Such technological improvements can be associated with new frequency band extensions, licensed and unlicensed spectrum access, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, decomposed network architectures and network topology extensions, device aggregation, advanced duplex communication, sidelinks and other device-to-device direct communication, IoT (including passive or environmental IoT) networks, RedCap UE functionality, industrial connectivity, multi-subscriber implementations, high-precision positioning, radio frequency (RF) sensing and / or artificial intelligence or machine learning (AI / ML), and more. These technological improvements can support use cases such as wireless backhaul, wireless communication hubs, extended reality (XR) and metaverse applications, meta-services for supporting vehicle connectivity, holographic and mixed reality communications, autonomous and collaborative robots, vehicle platooning and collaborative maneuvering, sensor networks, gesture detection, brain-computer interfaces, digital twin applications, asset management, and general coverage applications using non-terrestrial and / or aerial platforms, among others. The methods, operations, apparatuses, and techniques described herein can implement one or more of the foregoing technologies and / or support one or more of the foregoing use cases.

[0033] Figure 1 This is a diagram illustrating an example of a wireless communication network 100 according to the present disclosure. The wireless communication network 100 may be a 5G (or NR) network or a 6G network, or may include elements of a 5G (or NR) network or a 6G network, etc. The wireless communication network 100 may include a plurality of network nodes 110, shown as network node (NN) 110a, network node 110b, network node 110c, and network node 110d. Network nodes 110 may support communication with a plurality of UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e).

[0034] Network nodes 110 and UEs 120 of the wireless communication network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, frequency bands, carriers, and / or channels according to frequency or wavelength. For example, devices of the wireless communication network 100 can communicate using one or more operating frequency bands. In some aspects, multiple wireless networks 100 can be deployed in a given geographical area. Each wireless communication network 100 can support a specific radio access technology (RAT) (which may also be referred to as an air interface) and can operate on one or more carrier frequencies in one or more frequency ranges. Examples of RATs include 4G RAT, 5G / NR RAT, and / or 6G RAT, etc. In some examples, when multiple RATs are deployed in a given geographical area, each RAT in that geographical area can operate on a different frequency to avoid interference with each other.

[0035] Various operating frequency bands have been defined as frequency ranges designated FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Although a portion of FR1 is greater than 6 GHz, in some documents and articles, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band. Similarly, in some documents and articles, FR2 is often (interchangeably) referred to as the “millimeter wave” band, but this is different from the Very High Frequency (EHF) band (30 GHz to 300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU). The frequencies between FR1 and FR2 are often referred to as the mid-band frequencies, including FR3. Frequency bands falling within FR3 can inherit FR1 or FR2 characteristics, thereby effectively extending the characteristics of FR1 or FR2 into mid-band frequencies. Therefore, "below 6 GHz" (if used herein) can broadly refer to frequencies less than 6 GHz, within FR1, and / or included in mid-band frequencies. Similarly, the term "millimeter wave" (if used herein) can broadly refer to frequencies included in mid-band frequencies, within FR2, FR4, FR4-a, FR4-1, or FR5, and / or within the EHF band. Higher frequency bands can extend 5G NR operation, 6G operation, and / or other RATs above 52.6 GHz. For example, each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band. In some examples, the wireless communication network 100 can implement dynamic spectrum sharing (DSS), where multiple RATs (e.g., 4G / LTE and 5G / NR) are implemented within a single frequency band using dynamic bandwidth allocation (e.g., based on user demand). It is conceivable that the frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1 and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0036] Network node 110 may include one or more devices, components, or systems that enable communication between UE 120 and one or more devices, components, or systems of wireless communication network 100. Network node 110 may be, may include, or may be referred to as an NR network node, 5G network node, 6G network node, node B, eNB, gNB, access point (AP), transmit / receive point (TRP), mobility element, core, network entity, network element, network equipment, and / or another type of device, component, or system included in the radio access network (RAN).

[0037] Network node 110 may be implemented as a single physical node (e.g., a single physical structure) or as two or more physical nodes (e.g., two or more different physical structures). For example, network node 110 may be a device or system implementing a portion of a radio protocol stack, a device or system implementing a complete radio protocol stack (such as a complete gNB protocol stack), or a collection of devices or systems collectively implementing a complete radio protocol stack. For example, and as shown, network node 110 may be an aggregated network node (with an aggregated architecture), meaning that network node 110 can implement a complete radio protocol stack physically and logically integrated within a single node (e.g., a single physical structure) in the wireless communication network 100. For example, aggregated network node 110 may consist of a single standalone base station or a single TRP that uses the complete radio protocol stack to implement or facilitate communication between UE 120 and the core network of wireless communication network 100.

[0038] Alternatively, and also as shown in the figure, network node 110 can be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 can realize a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same or different geographical locations. For example, a decomposed network node may have a decomposed architecture. In some deployments, decomposed network node 110 may be used in integrated access and backhaul (IAB) networks, in open radio access networks (O-RAN) (such as network configurations compliant with the O-RAN Alliance), or in virtualized radio access networks (vRAN) (also referred to as cloud radio access networks (C-RAN)) to facilitate scaling by decomposing base station functionality into multiple units that can be deployed independently.

[0039] Network nodes 110 of the wireless communication network 100 may include one or more central units (CUs), one or more distributed units (DUs), and / or one or more radio units (RUs). CUs may host one or more higher-layer control functions, such as Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, and / or Service Data Adaptation Protocol (SDAP) functions, etc. DUs may host one or more of the Radio Link Control (RLC) layer, Media Access Control (MAC) layer, and / or one or more higher physical (PHY) layers, at least in part, according to functional splits (such as functional splits defined by 3GPP). In some examples, DUs may also host one or more lower PHY layer functions, such as Fast Fourier Transform (FFT), Inverse FFT (iFFT), beamforming, Physical Random Access Channel (PRACH) extraction and filtering, and / or scheduling of resources for one or more UEs 120, etc. RUs may host RF processing functions or lower PHY layer functions, such as FFT, iFFT, beamforming, or PRACH extraction and filtering, etc., according to functional splits (such as lower-layer functional splits). In this type of architecture, each RU can be operated to handle over-the-air (OTA) communications with one or more UE 120s.

[0040] In some aspects, network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. Additionally or alternatively, network node 110 may include one or more near real-time (near RT) RAN Intelligent Controllers (RICs) and / or one or more non-real-time (non-RT) RICs. In some examples, CUs, DUs, and / or RUs may be implemented as virtual units, such as Virtual Central Units (VCUs), Virtual Distributed Units (VDUs), or Virtual Radio Units (VRUs), etc. Virtual units may be implemented as virtual network functions, such as those associated with cloud deployments.

[0041] Some network nodes 110 (e.g., base stations, RUs, or TRPs) can provide communication coverage for specific geographic areas. In 3GPP, the term "cell" can refer to the coverage area of ​​network node 110 or to network node 110 itself, depending on the context in which the term is used. Network node 110 can support one or more (e.g., three) cells. In some examples, network node 110 can provide communication coverage for macro cells, pico cells, femto cells, or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UE 120 with a service subscription. A femto cell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UE 120 associated with that femto cell (e.g., UE 120 in a Closed Subscriber Group (CSG)). The network node 110 used for a macro cell may be referred to as a macro network node. Network node 110 used for a pico cell may be referred to as a pico network node. Network node 110 used for a femtocell may be referred to as a femto network node or a home network node. In some examples, the cell may not necessarily be stationary. For example, the geographical area of ​​the cell may be mobile based on the location of the associated mobile network node 110 (e.g., a train, satellite base station, unmanned aerial vehicle, or non-terrestrial network (NTN) network node).

[0042] The wireless communication network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, piconet nodes, femtonet nodes, relay network nodes, aggregation network nodes, and / or decomposition network nodes, etc. Figure 1 In the example shown, network node 110a can be a macro network node for macro cell 130a, network node 110b can be a pico network node for pico cell 130b, and network node 110c can be a femto network node for femto cell 130c. Compared to other types of network nodes 110, the various types of network nodes 110 typically transmit at different power levels, serve different coverage areas, and / or have different effects on interference in the wireless communication network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0043] In some examples, network node 110 may be, may include, or operate as a RU, TRP, or base station communicating with one or more UEs 120 via a radio access link (which may be referred to as a "Uu" link). The radio access link may include a downlink and an uplink. A "downlink" (or "DL") refers to the communication direction from network node 110 to UE 120, and an "uplink" (or "UL") refers to the communication direction from UE 120 to network node 110. Downlink channels may include one or more control channels and one or more data channels. Downlink control channels may be used to transmit downlink control information (DCI) (e.g., scheduling information, reference signals, and / or configuration information) from network node 110 to UE 120. Downlink data channels may be used to transmit downlink data (e.g., user data associated with UE 120) from network node 110 to UE 120. Downlink control channels may include one or more physical downlink control channels (PDCCH), and downlink data channels may include one or more physical downlink shared channels (PDSCH). The uplink channel may similarly include one or more control channels and one or more data channels. The uplink control channel can be used to transmit uplink control information (UCI) from UE 120 to network node 110 (e.g., transmitting corresponding reference signals and / or feedback with one or more downlinks). The uplink data channel can be used to transmit uplink data (e.g., user data associated with UE 120) from UE 120 to network node 110. The uplink control channel may include one or more physical uplink control channels (PUCCH), and the uplink data channel may include one or more physical uplink shared channels (PUSCH). The downlink and uplink may each include a set of resources on which network node 110 and UE 120 can communicate.

[0044] Downlink and uplink resources may include time-domain resources (frames, subframes, time slots, and / or symbols), frequency-domain resources (bands, component carriers, subcarriers, resource blocks, and / or resource elements), and / or spatial-domain resources (specific transmission directions and / or beam parameters). Frequency-domain resources in some bands may be subdivided into bandwidth portions (BWPs). A BWP may be a contiguous block of frequency-domain resources allocated to one or more UEs 120 (e.g., a contiguous block of resource blocks). A UE 120 may be configured with both an uplink BWP and a downlink BWP (where the uplink BWP and downlink BWP may be the same BWP or different BWPs). BWPs may be dynamically configured and / or reconfigured (e.g., by sending DCI configuration to one or more UEs 120 via network node 110), meaning that BWPs may be adjusted in real-time (or near real-time) based on changing network conditions in the wireless communication network 100 and / or based on the specific requirements of one or more UEs 120. This allows for more efficient use of available frequency domain resources in the wireless communication network 100, as fewer frequency domain resources can be allocated to the BWP for UE 120 (which reduces the number of frequency domain resources that UE 120 needs to monitor), thus allowing more frequency domain resources to be distributed across multiple UE 120s. Therefore, the BWP can also assist in the implementation of such UE 120s by facilitating the configuration of smaller bandwidths for communications performed by lower-capacity UE 120s.

[0045] As described above, in some aspects, the wireless communication network 100 may be an IAB network, may include an IAB network, or may be included in an IAB network. In an IAB network, at least one network node 110 is an anchor network node communicating with a core network. The anchor network node 110 may also be referred to as an IAB donor (or "IAB donor"). The anchor network node 110 may be connected to the core network via a wired backhaul link. For example, the Ng interface of the anchor network node 110 may terminate at the core network. Additionally or alternatively, the anchor network node 110 may be connected to one or more devices in the core network that provide core access and mobility management functions (AMF). An IAB network typically also includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply IAB nodes (or "IAB-nodes"). Each non-anchor network node 110 can directly communicate with the anchor network node 110 via a wireless backhaul link to access the core network, or can indirectly communicate with the anchor network node 110 via one or more other non-anchor network nodes 110 and an associated wireless backhaul link forming a backhaul path to the core network. Some anchor network nodes 110 or other non-anchor network nodes 110 can also directly communicate with one or more UEs 120 via a wireless access link carrying access services. For example, network resources used for wireless communication (such as time resources, frequency resources, and / or spatial resources) can be shared between the access link and the backhaul link.

[0046] In some examples, any network node 110 relaying communication may be referred to as a relay network node, a relay station, or simply a repeater. A repeater may receive communications from an upstream station (e.g., another network node 110 or UE 120) and transmit communications to a downstream station (e.g., UE 120 or another network node 110). In this case, the wireless communication network 100 may include or be referred to as a "multi-hop network." Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. Additionally or alternatively, UE 120 can be a relay station capable of relaying transmissions to or from other UE 120s, or can operate as such a relay station. UE 120 relaying communication can be referred to as a UE repeater or relay UE, etc.

[0047] UE 120 may be physically distributed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. UE 120 may be, may include, an access terminal, another terminal, a mobile station, or a subscriber unit, or may be included in an access terminal, another terminal, a mobile station, or a subscriber unit. UE 120 may be, or may include, a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband and / or smart jewelry (such as a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device and / or a satellite radio), an extended reality (XR) device, a vehicle component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device), a UE function of a network node, and / or any other suitable device or function that can communicate via a wireless medium, or may be coupled to them.

[0048] UE 120 and / or network node 110 may include one or more chips, system-on-a-chip (SoC), chipsets, packages, or devices that individually or collectively constitute or include a processing system. The processing system includes processor (or “processing”) circuitry in the form of one or more processors, microprocessors, processing units (such as central processing units (CPUs), graphics processing units (GPUs), neural processing units (NPUs), and / or digital signal processors (DSPs)), processing blocks, application-specific integrated circuits (ASICs), programmable logic devices (PLDs) (such as field-programmable gate arrays (FPGAs)), or other discrete gate or transistor logic components or circuits (all of which are generally referred to herein individually as “processors” or collectively as “processors” or “processor circuitry”). One or more of these processors may be individually or collectively configured to perform the various functions or operations described herein. A group of processors that can be configured or configured to perform a set of functions may include a first processor that can be configured or configured to perform a first function in the set, and a second processor that can be configured or configured to perform a second function in the set, or may include the entire group of processors that are configured or configured to perform the set of functions.

[0049] The processing system may also include memory circuitry in the form of one or more memory devices, memory blocks, memory elements, or other discrete gate or transistor logic components or circuits, each of which may include tangible storage media such as random access memory (RAM) or read-only memory (ROM) or combinations thereof (all of which are generally referred to herein individually as "memory" or collectively as "memory" or "memory circuitry"). One or more of these memories may be coupled to one or more processors in the processor (e.g., operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) and may store processor-executable code (such as software) individually or collectively, which, when executed by one or more processors in the processor, may configure one or more processors in the processor to perform the various functions or operations described herein. Additionally or alternatively, in some examples, one or more processors in the processor may be pre-configured to perform the various functions or operations described herein without being configured by software. The processing system may also include or be coupled to one or more modems (such as Wi-Fi (e.g., IEEE compliant) modems or cellular (e.g., 3GPP 4G LTE, 5G, or 6G compliant) modems). In some embodiments, one or more processors of the processing system include or implement one or more modems among the modems. The processing system may also include, or be coupled to, multiple radio components (collectively, “radio components”), multiple RF chains, or multiple transceivers, each of which may in turn be coupled to one or more antennas among multiple antennas. In some embodiments, one or more processors of the processing system include or implement one or more of the radio components, RF chains, or transceivers. UE 120 may be included or may be contained in a housing that houses components associated with UE 120, including the processing system.

[0050] Some UEs 120 may be considered Machine Type Communication (MTC) UEs, or evolved or enhanced Machine Type Communication (eMTC) UEs, further enhanced eMTC (feMTC) UEs, or enhanced feMTC (efeMTC) UEs, or further evolutions thereof, all of which may be referred to simply as "MTC UEs". MTC UEs may be, may include, or may be included in or coupled with the following: robots, unmanned aerial vehicles or drones, remote devices, sensors, meters, monitors, and / or location tags. Some UEs 120 may be considered IoT devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. IoT UEs or NB-IoT devices may be, may include, or may be included in or coupled with the following: industrial machines, appliances, refrigerators, doorbell camera devices, home automation devices, and / or lighting fixtures, etc. Some UEs 120 may be considered customer premises equipment, which may include telecommunications equipment installed at a customer location (such as a home or office) to enable access to a service provider’s network (such as being included in or communicating with the wireless communication network 100).

[0051] Some UEs 120 can be categorized according to different categories associated with varying levels of complexity and / or capabilities. UEs 120 in the first category facilitate large-scale IoT within the wireless communication network 100 and offer lower complexity and / or cost compared to UEs 120 in the second category. UEs 120 in the second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-level UEs, advanced UEs, full-capability UEs, and / or premium UEs capable of ultra-reliable low-latency communication (URLLC), enhanced mobile broadband (eMBB), and / or precise positioning, etc., within the wireless communication network 100. UEs 120 in the third category may have intermediate-level complexity and / or capabilities (e.g., capabilities between UEs 120 in the first category and UEs 120 in the second category). UEs 120 in the third category may be referred to as reduced-capability UEs (“RedCap UEs”), intermediate-level UEs, NR lightweight UEs, and / or NR simplified UEs, etc. RedCap UEs bridge the gap in capabilities and complexity between NB-IoT devices and / or eMTC UEs and mission-critical IoT devices and / or premium UEs. RedCap UEs can include, for example, wearable devices, IoT devices, industrial sensors, and / or cameras associated with limited bandwidth, power capacity, and / or transmission range. RedCap UEs can support healthcare environments, building automation, power distribution, process automation, transportation and logistics, and / or smart city deployments, among others.

[0052] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly with each other using sidelink communication (e.g., without communicating through a network node 110 acting as an intermediary). As an example, UE 120a can send data, control information, or other signaling directly to UE 120e as sidelink communication. This contrasts with, for example, UE 120a first sending data to network node 110 in UL communication, and then that network node sending data to UE 120e in DL communication. In various examples, UE 120 can use peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or vehicle-to-pedestrian (V2P) protocols), and / or mesh network communication protocols to send and receive sidelink communication. In some deployments and configurations, network node 110 may schedule and / or allocate resources for sidelink communication between UEs 120 in the wireless communication network 100. In some other deployments and configurations, UE 120 (instead of network node 110) may perform or cooperate with or negotiate with one or more other UEs to perform scheduling operations, resource selection operations, and / or other operations for sidelink communication.

[0053] In various examples, in addition to half-duplex operation, some network nodes and UEs in the wireless communication network 100, including network node 110 and UE 120, can also be configured for full-duplex operation. Network node 110 or UE 120 operating in half-duplex mode can perform only one of transmission or reception during a specific time resource period (such as a specific time slot, symbol, or other time period). Half-duplex operation may involve time division duplex (TDD), where the DL transmission of network node 110 and the UL transmission of UE 120 do not occur in the same time resource (i.e., the transmissions do not overlap in time). In contrast, network node 110 or UE 120 operating in full-duplex mode can transmit and receive communications concurrently (e.g., within the same time resource). By operating in full-duplex mode, network node 110 and / or UE 120 can generally increase the capacity of the network and radio access links. In some examples, full-duplex operation may involve frequency division duplex (FDD), in which network node 110 performs DL transmission in a first frequency band or on a first component carrier, and UE 120 performs transmission in a second frequency band or on a second component carrier, the second frequency band or the second component carrier being different from the first frequency band or the first component carrier, respectively. In some examples, full-duplex operation may be enabled for UE 120 but not for network node 110. For example, UE 120 may simultaneously transmit UL to the first network node 110 and receive DL transmissions from the second network node 110 in the same time resources. In some other examples, full-duplex operation may be enabled for network node 110 but not for UE 120. For example, network node 110 may simultaneously transmit DL to the first UE 120 and receive UL transmissions from the second UE 120 in the same time resources. In some other examples, full-duplex operation may be enabled for both network node 110 and UE 120.

[0054] In some examples, UE 120 and network node 110 can perform MIMO communication. "MIMO" generally refers to the simultaneous transmission or reception of multiple signals (such as multiple layers or multiple data streams) using the same time and frequency resources. MIMO technology typically utilizes multipath propagation. MIMO can be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO can support simultaneous transmission to multiple receivers, which is called MU-MIMO. Some radio access technologies (RATs) can employ advanced MIMO techniques such as mTRP operation (including redundant transmission or reception on multiple TRPs), reciprocity in the time or frequency domain, single-frequency network (SFN) transmission, or noncoherent joint transmission (NC-JT).

[0055] In some aspects, the UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive configuration information from a network node indicating an enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial PDCCH communication; receive retransmissions of the initial PDCCH communication from the network node; identify failures in the UE's reception of the initial PDCCH communication; and send enhanced HARQ ACK / NACK information to the network node in association with the configuration information, indicating failures in the UE's reception of the initial PDCCH communication. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0056] In some aspects, a network node (e.g., network node 110) may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may send configuration information to the UE indicating a modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication; send the initial PDCCH communication to the UE; send a retransmission of the initial PDCCH communication to the UE; and receive, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0057] As indicated above, Figure 1 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 1 The examples described are different.

[0058] Figure 2 This is a diagram illustrating an example network node 110 communicating with an example UE 120 in a wireless network according to the present disclosure.

[0059] like Figure 2As shown, network node 110 may include a data source 212, a transmit processor 214, a transmit (TX) MIMO processor 216, a set of modems 232 (shown as 232a to 232t, where t≥1), a set of antennas 234 (shown as 234a to 234v, where v≥1), a MIMO detector 236, a receive processor 238, a data sink 239, a controller / processor 240, a memory 242, a communication unit 244, a scheduler 246, and / or a communication manager 150, etc. In some configurations, one or a combination of antennas 234, modems 232, MIMO detectors 236, receive processors 238, transmit processors 214, and / or TX MIMO processors 216 may be included in the transceiver of network node 110. The transceiver may be under the control of and used by one or more processors (such as controller / processor 240), and in some respects, may perform aspects of the methods, procedures and / or operations described herein in conjunction with processor-readable code stored in memory 242. In some respects, network node 110 may include one or more interfaces, communication components and / or other components that facilitate communication with UE 120 or another network node.

[0060] The terms “processor,” “controller,” or “controller / processor” can refer to one or more controllers and / or one or more processors. For example, references to “a / the processor,” “a / the controller / processor,” etc. (in the singular) should be understood as referring to a combination of… Figure 2 The processor described refers to any one or more processors, such as a single processor or a combination of multiple different processors. The reference to "one or more processors" should be understood as a combination of references. Figure 2 Any one or more processors described herein. For example, one or more processors of network node 110 may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and / or controller / processor 240. Similarly, one or more processors of UE 120 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and / or controller / processor 280.

[0061] In some aspects, a single processor can perform all operations described as being performed by one or more processors. In some aspects, a first set of one or more processors can perform a first operation described as being performed by that one or more processors, and a second set of one or more processors can perform a second operation described as being performed by that one or more processors. The first set of processors and the second set of processors can be the same set of processors or can be different sets of processors. The reference to "one or more memories" should be understood to refer to any one or more memories of the corresponding device, such as combined... Figure 2 The memory described. For example, an operation described as being performed by one or more memories can be performed by the same subset of the one or more memories or by different subsets of the one or more memories.

[0062] For downlink communication from network node 110 to UE 120, transmitting processor 214 may receive data (“downlink data”) intended for use by UE 120 (or a set of UEs including UE 120) from data source 212 (such as a data pipeline or data queue). In some examples, transmitting processor 214 may select one or more MCSs for UE 120 based on one or more Channel Quality Indicators (CQIs) received from UE 120. Network node 110 may process the data (e.g., including encoding the data) based on the MCS selected for UE 120 for transmission to UE 120 on the downlink, thereby generating data symbols. Transmitting processor 214 may process system information (e.g., semi-static resource partitioning information (SRPI)) and / or control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and / or control symbols. The transmitting processor 214 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), demodulation reference signals (DMRS), or channel state information (CSI) reference signals (CSI-RS)) and / or synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)).

[0063] The TX MIMO processor 216 can perform space processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols where applicable, and can output a set of symbol streams (e.g., TA set of output symbol streams is provided to modem 232. For example, each output symbol stream may be provided to a corresponding modulator component (shown as MOD) of modem 232. Each modem 232 may use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for orthogonal frequency division multiplexing (OFDM)) to obtain an output sample stream. Each modem 232 may further use the corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a time-domain downlink signal. Modems 232a to 232t may transmit the set of downlink signals (e.g., [missing information]) together via a set of corresponding antennas 234. T (One downlink signal).

[0064] Downlink signals may include DCI communication, MAC control element (MAC-CE) communication, RRC communication, downlink reference signals, or another type of downlink communication. Downlink signals may be transmitted on the PDCCH, PDSCH, and / or on another downlink channel. Downlink signals may carry one or more transport blocks (TBs) of data. A TB may be a data unit transmitted via the air interface in the wireless communication network 100. A data stream (e.g., from data source 212) may be encoded into multiple TBs for transmission via the air interface. The number of TBs used to carry data associated with a particular data stream may be associated with a TB size shared by multiple TBs. The TB size may be based on the radio channel conditions of the air interface, the MCS used to encode the data, downlink resources allocated for transmitting data, and / or other parameters, or otherwise associated with them. Generally, a larger TB size allows for a larger amount of data to be transmitted in a single transmission, reducing signaling overhead. However, a larger TB size may be more prone to transmission and / or reception errors than a smaller TB size, but such errors can be mitigated through more robust error correction techniques.

[0065] For uplink communication from UE 120 to network node 110, the uplink signal from UE 120 may be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232, shown as DEMOD), detected where applicable by MIMO detector 236 (e.g., receive (Rx) MIMO processor), and / or further processed by receive processor 238 to obtain decoded data and / or control information. Receive processor 238 may provide the decoded data to data sink 239 (which may be a data pipeline, data queue, and / or another type of data sink) and provide the decoded control information to processors such as controller / processor 240.

[0066] Network node 110 may use scheduler 246 to schedule one or more UEs 120 for downlink or uplink communication. In some aspects, scheduler 246 may use DCI to dynamically schedule DL transmissions to and / or UL transmissions from UE 120. In some examples, scheduler 246 may allocate repetitive time-domain and / or frequency-domain resources that UE 120 may use for transmitting and / or receiving communication with RRC configuration (e.g., semi-static configuration), for example, to perform semi-persistent scheduling (SPS) or to configure configuration grant (CG) for UE 120.

[0067] One or more of the following may be included in the RF chain of network node 110: transmit processor 214, TX MIMO processor 216, modem 232, antenna 234, MIMO detector 236, receive processor 238, and / or controller / processor 240. The RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs), and / or other devices for converting analog signals (such as those used for transmission or reception via an air interface) to digital signals (such as those used for processing by one or more processors of network node 110). In some aspects, the RF chain may be a transceiver of network node 110, or may be included in such a transceiver.

[0068] In some examples, network node 110 may use communication unit 244 to communicate with the core network and / or other network nodes. Communication unit 244 may support wired and / or wireless communication protocols and / or connections, such as Ethernet, fiber optic, Common Public Radio Interface (CPRI), and / or wired or wireless backhaul, etc. Network node 110 may use communication unit 244 to send and / or receive data associated with UE 120, or to execute network control signaling, etc. Communication unit 244 may include transceivers and / or interfaces, such as network interfaces.

[0069] UE 120 may include a collection of antennas 252 (shown as antennas 252a to 252r, where r ≥ 1), a collection of modems 254 (shown as modems 254a to 254u, where u ≥ 1), a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, a memory 282, and / or a communication manager 140, etc. One or more components of UE 120 may be included in housing 284. In some aspects, one or a combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, or TX MIMO processor 266 may be included in a transceiver included in UE 120. The transceiver may be under the control of and used by one or more processors (such as controller / processor 280), and in some respects, may perform aspects of the methods, procedures, or operations described herein in conjunction with processor-readable code stored in memory 282. In some respects, UE 120 may include another interface, another communication component, and / or another component that facilitates communication with network node 110 and / or another UE 120.

[0070] For downlink communication from network node 110 to UE 120, the set of antennas 252 can receive downlink communication or signals from network node 110, and can receive the set of downlink signals (e.g., R Each received signal is provided to a set of modems 254. For example, each received signal may be provided to a corresponding demodulator component (shown as DEMOD) of modem 254. Each modem 254 may use the corresponding demodulator component to condition (e.g., filter, amplify, down-convert, and / or digitize) the received signal to obtain an input sample. Each modem 254 may use the corresponding demodulator component to further demodulate or process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 may obtain the received symbols from the set of modems 254, may perform MIMO detection on the received symbols where applicable, and may provide the detected symbols. Receiver processor 258 may process (e.g., decode) the detected symbols, may provide the decoded data for UE 120 to data sink 260 (which may include data pipelines, data queues, and / or applications executed on UE 120), and may provide the decoded control information and system information to controller / processor 280.

[0071] For uplink communication from UE 120 to network node 110, the transmitting processor 264 may receive and process data (“uplink data”) from data source 262 (such as data pipelines, data queues, and / or applications running on UE 120) and control information from controller / processor 280. The control information may include one or more parameters, feedback, one or more signal measurements, and / or other types of control information. In some aspects, the receiving processor 258 and / or controller / processor 280 may determine one or more parameters related to the transmission of uplink communication for received signals (such as those received from network node 110 or another UE). One or more parameters may include a Reference Signal Received Power (RSRP) parameter, a Received Signal Strength Indicator (RSSI) parameter, a Reference Signal Received Quality (RSRQ) parameter, a Channel Quality Indicator (CQI) parameter, or a Transmit Power Control (TPC) parameter, etc. The control information may include indications of RSRP, RSSI, RSRQ, CQI, TPC, and / or another parameter. Control information can facilitate parameter selection and / or scheduling for UE 120 by network node 110.

[0072] Transmit processor 264 can generate reference symbols for one or more reference signals, such as uplink DMRS, uplink SRS, and / or another type of reference signal. Symbols from transmit processor 264 may (where applicable) be pre-decoded by TX MIMO processor 266 and further processed by an assembly of modems 254 (e.g., for DFT-s-OFDM or CP-OFDM). TX MIMO processor 266 may (where applicable) perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and may provide an output symbol stream set (e.g., ...) to the assembly of modems 254. U Each output symbol stream may be provided to a corresponding modulator component (shown as MOD) of modem 254. Each modem 254 may use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 254 may further use the corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain an uplink signal.

[0073] Modems 254a to 254u can transmit uplink signal sets (e.g., via corresponding antenna sets 252) R One uplink signal or UUplink signaling may include UCI communication, MAC-CE communication, RRC communication, or another type of uplink communication. Uplink signals may be transmitted on PUSCH, PUCCH, and / or another type of uplink channel. Uplink signals may carry one or more TBs of data. Sidelink data and control transmission (i.e., transmission directly between two or more UEs 120) may typically use techniques similar to those described for uplink data and control transmission, and may use sidelink-specific channels such as the Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), and / or Physical Sidelink Feedback Channel (PSFCH).

[0074] One or more antennas in the set of antennas 252 or the set of antennas 234 may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc., or may be included in one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or with one or more transmitting or receiving components (such as...) Figure 2 An antenna module is a combination of one or more antenna elements coupled to one or more components. As used herein, "antenna" can mean one or more antennas, one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, or one or more antenna arrays. "Antenna panel" can mean a group of antennas (such as antenna elements) arranged in an array or panel that can facilitate beamforming by manipulating the parameters of that group of antennas. "Antenna module" can mean a circuit that includes one or more antennas, and may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.

[0075] In some examples, each antenna element of antenna 234 or antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals. For example, a single antenna element may include a first sub-element cross-polarized with a second sub-element, which can be used to independently transmit cross-polarized signals. Antenna elements may include patch antennas, dipole antennas, and / or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern. The spacing between antenna elements can allow signals with a desired wavelength transmitted individually by the antenna elements to interact or interfere (e.g., to form a desired beam) in various directions. For example, given a desired wavelength or frequency range, the spacing may provide a quarter wavelength, half a wavelength, or another fraction of the wavelength between adjacent antenna elements to allow desired constructive and destructive interference modes of signals transmitted by individual antenna elements within that desired range.

[0076] The amplitude and / or phase of signals transmitted via antenna elements and / or sub-elements can be modulated and (e.g., by manipulating phase shifts, phase offsets, and / or amplitudes) shifted relative to each other to generate one or more beams; this is known as beamforming. The term "beam" can refer to the directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction. "Beam" can also generally refer to the direction associated with such directional signal transmission, the set of directional resources associated with the signal transmission (e.g., angle of arrival, horizontal direction, and / or vertical direction), and / or a set of parameters indicating one or more aspects of the directional signal, the direction associated with the signal, and / or the set of directional resources associated with the signal. In some implementations, antenna elements can be individually selected or deselected for the directional transmission of a signal (or multiple signals) by controlling the amplitude of one or more corresponding amplifiers and / or the phase of the signal to form one or more beams. The shape of the beam (such as amplitude, width, and / or the presence of sidelobes) and / or the direction of the beam (such as the angle of the beam relative to the surface of the antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and / or amplitudes of multiple signals relative to each other.

[0077] Different UEs 120 or network nodes 110 may include different numbers of antenna elements. For example, UE 120 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or different numbers of antenna elements. As another example, network node 110 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or different numbers of antenna elements. Generally speaking, a larger number of antenna elements provides increased control over the parameters used for beamforming compared to a smaller number of antenna elements, while a smaller number of antenna elements may be less complex to implement and can use less power. Multiple antenna elements can support multi-layer transmission, in which the same time and frequency resources are used to utilize spatial multiplexing to transmit a first layer of communication (which may include a first data stream) and a second layer of communication (which may include a second data stream).

[0078] Although Figure 2 The boxes in the diagram are illustrated as different components, but the functions described above with respect to these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0079] Figure 3 This is an illustration of an example decomposed base station architecture 300 according to the present disclosure. One or more components of the example decomposed base station architecture 300 may be, may include, or may be included in one or more network nodes (such as one or more network nodes 110). The decomposed base station architecture 300 may include a CU 310, which may communicate directly with the core network 320 via a backhaul link, or may communicate indirectly with the core network 320 via one or more decomposed control units, such as non-RT RIC 350 associated with a Service Management and Orchestration (SMO) framework 360 and / or a near-RT RIC 325 (e.g., via an E2 link). The CU 310 may communicate with one or more DUs 330 via a corresponding midhaul link (such as via an F1 interface). Each DU in the DU 330 may communicate with one or more RUs 340 via a corresponding fronthaul link. Each RU in the RU 340 may communicate with one or more UEs 120 via a corresponding RF access link. In some deployments, a UE 120 may be served simultaneously by multiple RUs 340.

[0080] Each component of the disassembled base station architecture 300 (including CU 310, DU 330, RU 340, near-RT RIC 370, non-RT RIC 350, and SMO frame 360) may include one or more interfaces or may be coupled to one or more interfaces for receiving or transmitting signals, such as data or information, via wired or wireless transmission media.

[0081] In some respects, the CU 310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as an E1 interface. The CU 310 can be deployed to communicate with one or more DU 330s for network control and signaling, as needed. Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340s. For example, the DU 330 may host various layers, such as the RLC layer, MAC layer, or one or more PHY layers (such as one or more high PHY layers or one or more low PHY layers). Each layer (which may also be referred to as a module) can be implemented using an interface for signaling to other layers (and modules) hosted by the DU 330, or for signaling to control functions hosted by the CU 310. Each RU 340 may implement lower-layer functionality. In some respects, the real-time and non-real-time aspects of communication with the control plane and user plane of the RU 340 can be controlled by the corresponding DU 330.

[0082] The SMO framework 360 supports RAN deployment and provisioning for both non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 360 supports the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, the SMO framework 360 can interact with cloud computing platforms such as the Open Cloud (O-Cloud) platform 390 to perform network element lifecycle management (such as instantiating virtualized network elements) via cloud computing platform interfaces such as the O2 interface. Virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 350, and / or near-RT RIC 370. In some aspects, the SMO framework 360 can communicate with hardware aspects of the 4G RAN, 5G NR RAN, and / or 6G RAN (such as the Open eNB (O-eNB) 380) via the O1 interface. Additionally or alternatively, the SMO framework 360 can communicate directly with each of one or more RUs 340 via the corresponding O1 interface. In some deployments, this configuration enables each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0083] The non-RT RIC 350 may include or implement logical functions that enable non-real-time control and optimization of RAN elements and resources, including artificial intelligence / machine learning (AI / ML) workflows for model training and updates, and / or policy-based guidance of applications and / or features in the near-RT RIC 370. The non-RT RIC 350 may be coupled to or communicate with the near-RT RIC 370, such as via an A1 interface. The near-RT RIC 370 may include or implement logical functions that enable near real-time control and optimization of RAN elements and resources via an interface, such as an E2 interface, through data collection and actions, connecting one or more CU 310s, one or more DU 330s, and / or O-eNBs to the near-RT RIC 370.

[0084] In some aspects, to generate AI / ML models to be deployed in the near-RT RIC 370, the non-RT RIC 350 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 370 and can be received from non-network data sources or network functions at the SMO framework 360 or the non-RT RIC 350. In some examples, the non-RT RIC 350 or near-RT RIC 370 may modulate RAN behavior or performance. For example, the non-RT RIC 350 may monitor long-term trends and patterns in performance and may employ AI / ML models to perform corrective actions via the SMO framework 360 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0085] As indicated above, Figure 3 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 3 The examples described are different.

[0086] Figure 1 , Figure 2 or Figure 3 Network node 110, its controller / processor 240, UE 120, UE 120's controller / processor 280, CU 310, DU 330, RU 340, or any other component may implement one or more technologies or perform one or more operations associated with the enhanced HARQ ACK / NACK configuration related to the initial PDCCH communication, as described in more detail elsewhere herein. For example, network node 110's controller / processor 240, UE 120's controller / processor 280, CU 310, DU 330, RU 340, or any other component may implement one or more technologies or perform one or more operations associated with the enhanced HARQ ACK / NACK configuration related to the initial PDCCH communication, as described in more detail elsewhere herein. Figure 2 Any other component, CU 310, DU 330, or RU 340 may execute or instruct, for example Figure 5 Process 500 Figure 6The operation of process 600 or other processes as described herein (alone or in combination with one or more other processors). Memory 242 may store data and program code for network node 110, CU 310, DU 330, or RU 340. Memory 282 may store data and program code for UE 120. In some examples, memory 242 or memory 282 may include a non-transitory computer-readable medium storing instruction sets (e.g., code or program code) for wireless communication. Memory 242 may include one or more memories, such as a single memory or multiple different memories (of the same or different types). Memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same or different types). For example, the instruction set may be made to be executed by one or more processors of network node 110, UE 120, CU 310, DU 330, or RU 340 (e.g., directly, or after compilation, transformation, or interpretation). Figure 5 Process 500 Figure 6 The process 600 or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0087] In some aspects, the UE (e.g., UE 120) includes components for receiving configuration information from a network node indicating an enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial PDCCH communication; components for retransmitting the initial PDCCH communication from the network node; components for identifying a failure of the UE to receive the initial PDCCH communication; and / or components for sending enhanced HARQ ACK / NACK information, associated with the configuration information, to the network node indicating a failure of the UE to receive the initial PDCCH communication. Components enabling the UE to perform the operations described herein may include, for example, one or more of the following: a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0088] In some aspects, a network node (e.g., network node 110) includes components for transmitting configuration information from the network node to the UE indicating a modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication; components for transmitting the initial PDCCH communication from the network node to the UE; components for transmitting the retransmission of the initial PDCCH communication from the network node to the UE; and / or components for receiving, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication. Components for the network node to perform the operations described herein may include, for example, one or more of the following: a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0089] In some cases, UE-specific beams can be used to transmit PDCCH communications. However, the UE may fail to receive initial PDCCH communications. For example, in some situations, the UE may be monitoring different beams, PDCCH MU-MIMO may be enabled, leading to interference associated with nearby UEs, and / or network nodes may be transmitting PDCCH at inappropriate aggregation levels, etc. Failure to receive initial PDCCH communications by the UE may result in increased BLER, mismatch between C-DRX on and off periods associated with the UE and network nodes, and / or mismatch between active BWPs between on and off periods associated with the UE and network nodes, etc.

[0090] In some cases, if the UE loses the initial PDCCH communication, it may send an erroneous ACK feedback associated with the HARQ ACK / NACK configuration upon receiving the first retransmission of the PDCCH communication. This erroneous ACK feedback may trigger an RLC retransmission, potentially leading to increased latency. In some cases, when using adaptive retransmission, all lost initial transmissions will result in an erroneous ACK being sent by the UE, because if the initial transmission is lost, the UE may be unable to decode any subsequent retransmissions. In these cases, the ACK can serve as an indication of early termination of the HARQ retransmission process. In some situations, the UE may lack a mechanism for quickly detecting and handling lost initial PDCCH communication.

[0091] Some aspects of the techniques described herein can provide enhanced HARQ ACK / NACK configuration associated with initial PDCCH communication. For example, in some aspects, an initial hard bit can be added to HARQ ACK / NACK communication to indicate a lost initial PDCCH. In some aspects, for example, the UE can indicate to the network node its ability to support enhanced HARQ ACK / NACK feedback. The network node can provide configuration information enabling enhanced HARQ ACK / NACK feedback (e.g., Radio Resource Control (RRC) reconfiguration). In some cases, the configuration information can be provided based on the activation of radio frequency (RF) conditions and / or MU-MIMO operating modes (and / or one or more of their characteristics). The UE can identify the failure of receiving (e.g., detecting and / or decoding) initial PDCCH communication based on receiving retransmissions associated with a reserved modulation and decoding scheme (MCS) for retransmission. In association with identifying the failure of receiving initial PDCCH communication, the UE can send enhanced HARQ ACK / NACK information indicating the failure of receiving initial PDCCH communication. In response to receiving an enhanced HARQ ACK / NACK message, a network node can use an MCS that is not reserved for retransmission to send additional initial PDCCH communication.

[0092] In this way, some aspects of the techniques described herein enable network nodes to perform adaptive retransmission operations, thereby avoiding HARQ process failures and RLC retransmissions, which can lead to reduced latency and power consumption at the UE. In some examples, by adjusting the enhanced HARQ ACK / NACK configuration based on RF conditions and / or MU-MIMO operation, some aspects enable network nodes to configure legacy HARQ ACK / NACK configurations in relation to other conditions, thereby reducing the overhead associated with enhanced HARQ ACK / NACK configurations. In some examples, by identifying failures in receiving initial PDCCH communication based on the retransmitted MCS, the techniques described herein facilitate early detection of lost PDCCH transmissions, thereby reducing the number of retransmissions that the UE cannot decode, which can lead to reduced signaling overhead and latency.

[0093] Figure 4 This is a diagram of example 400 associated with an enhanced HARQ ACK / NACK configuration related to initial PDCCH communication, according to this disclosure. Figure 4 As shown, UE 402 can communicate with network node 404. In some aspects, UE 402 and network node 404 can be part of a wireless network (e.g., wireless network 100). In some aspects, UE 402 can be, similar to, include, or be included in... Figures 1 to 3Within the depicted UE 120. In some respects, network node 404 may be, similar to, include, or be included in Figure 1 and Figure 2 The network node 110 and / or Figure 3 Among one or more components of the depicted decomposed base station architecture 300. In some aspects, actions described as being performed by network node 404 can be performed by multiple different network nodes 404. For example, configuration actions can be performed by a first network node 404 (e.g., CU and / or DU), and radio communication actions can be performed by a second network node 404 (e.g., DU and / or RU). UE 402 and network node 404 can Figure 4 The operation shown has been performed with a wireless connection already established.

[0094] As shown by reference numeral 406 in the attached figure, UE 402 may transmit UE capability information (directly or via one or more other UEs and / or network nodes), and network node 404 may receive the UE capability information. In some aspects, the UE capability information may indicate UE capabilities associated with an enhanced HARQ ACK / NACK configuration.

[0095] As indicated by reference numeral 408 in the attached figure, network node 404 can detect the satisfaction of enhancement conditions. For example, in some aspects, enhancement conditions can be satisfied based on a threshold for the PDCCH signal-to-interference-plus-noise ratio (SINR) (e.g., when the PDCCH SINR value is less than a threshold). The threshold can be based on the CSI received from UE 402. In some aspects, enhancement conditions can be satisfied based on the activation of the MU-MIMO operating mode.

[0096] As indicated by reference numeral 410 in the accompanying drawings, network node 404 may send configuration information (directly or via one or more other network nodes), and UE 402 may receive such configuration information. In some aspects, UE 402 may receive the configuration information via RRC signaling, one or more Media Access Control (MAC) control elements (CE) and / or DCI, etc. In some aspects, the configuration information may include indications of one or more configuration parameters for UE 402 to select (e.g., those already known to UE 402 and / or previously indicated by network node 404 or another network device) and / or explicit configuration information for UE 402 to use in configuring UE 402, etc. In some aspects, network node 404 may send the configuration information in association with UE capabilities.

[0097] In some aspects, the configuration information may indicate an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. In some aspects, network node 404 may send the configuration information in association with the detection of the satisfaction of an enhanced condition. In some aspects, the enhanced HARQ ACK / NACK configuration may be associated with at least one of a radio frequency condition or a PDCCH MU-MIMO feature. In some aspects, UE 402 may configure itself at least in part based on the received configuration information. In some aspects, UE 402 may be configured to perform one or more of the operations described herein, at least in part based on the configuration information.

[0098] As indicated by reference numeral 412 in the accompanying drawings, network node 404 may transmit initial PDCCH communication (directly or via one or more other network nodes). For example, in some aspects, network node 404 may use an MCS reserved for initial PDCCH communication (e.g., a retransmitted MCS not reserved for PDCCH communication) to transmit the initial PDCCH communication. In some aspects, the initial PDCCH communication may include at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers. Figure 4 The “X” indicates that UE 402 may have failed to receive the initial PDCCH communication. As used herein, the term “receive” may include the detection of the communication (e.g., via an antenna) and / or the processing of the communication (e.g., via successfully decoding the communication).

[0099] As shown by reference numeral 414, network node 404 may (directly or via one or more other network nodes) send a retransmission of the initial PDCCH communication (e.g., a first retransmission), and UE 402 may receive this retransmission. Network node 404 may use an MCS reserved for retransmission (e.g., an MCS not reserved for the initial PDCCH communication) to send the retransmission of the initial PDCCH communication. As shown by reference numeral 416, UE 402 may identify a failure in receiving the initial PDCCH communication. In some aspects, UE 402 may identify a failure in receiving the initial PDCCH communication based on a retransmission MCS reserved for retransmission.

[0100] As shown by reference numeral 418 in the attached figure, UE 402 may transmit enhanced HARQ ACK / NACK communication (directly or via one or more other UEs and / or network nodes), and network node 404 may receive such enhanced HARQ ACK / NACK communication. The enhanced HARQ ACK / NACK information may include dedicated bits indicating that UE 402 has failed to receive initial PDCCH communication. In some aspects, UE 402 may transmit enhanced HARQ ACK / NACK information based on at least one of transmitting PUCCH communication including enhanced HARQ ACK / NACK information or PUSCH multiplexed with enhanced HARQ ACK / NACK information.

[0101] As shown by reference numeral 420 in the attached figure, network node 404 may send additional PDCCH communication, and UE 402 may receive such additional PDCCH communication. Network node 404 may send the additional PDCCH communication in association with enhanced HARQ ACK / NACK information. In some aspects, the additional initial PDCCH communication may be associated with an initial MCS that is not reserved for retransmission.

[0102] As indicated above, Figure 4 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 4 The descriptions are different.

[0103] Figure 5 This is a diagram illustrating an example process 500 performed, for example, at a UE or a device of a UE, according to this disclosure. Example process 500 is an example in which a device or UE (e.g., UE 402) performs operations associated with an enhanced HARQACK / NACK configuration related to initial PDCCH communication.

[0104] like Figure 5 As shown, in some aspects, process 500 may include receiving configuration information (block 510) from a network node indicating an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. For example, the UE (e.g., using...) Figure 7 The receiving component 702 and / or communication manager 706 depicted herein can receive configuration information from the network node indicating an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication, as described above.

[0105] like Figure 5 As further shown, in some aspects, process 500 may include a retransmission of the initial PDCCH communication received from the network node (box 520). For example, the UE (e.g., using...) Figure 7The receiving component 702 and / or communication manager 706 depicted above can receive retransmissions of the initial PDCCH communication from the network node.

[0106] like Figure 5 As further shown, in some aspects, process 500 may include identifying a failure of the UE to receive initial PDCCH communication (box 530). For example, the UE (e.g., using...) Figure 7 The communication manager 706 depicted above can identify failures in the UE's reception of initial PDCCH communication.

[0107] like Figure 5 Further shown, in some aspects, process 500 may include sending enhanced HARQ ACK / NACK information (box 540) to the network node in association with configuration information, indicating a failure of the UE to receive initial PDCCH communication. For example, the UE (e.g., using...) Figure 7 The transmitting component 704 and / or communication manager 706 described above can send, in association with configuration information, enhanced HARQ ACK / NACK information to the network node indicating that the UE has failed to receive initial PDCCH communication.

[0108] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0109] In a first aspect, the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

[0110] In a second aspect, either alone or in combination with the first aspect, process 500 includes the UE sending UE capability information to the network node indicating UE capabilities associated with enhanced HARQ ACK / NACK configuration, wherein receiving configuration information includes receiving configuration information in association with UE capabilities.

[0111] In the third aspect, the enhanced HARQ ACK / NACK configuration is associated, alone or in combination with one or more of the first and second aspects, with at least one of the radio frequency conditions or PDCCH MU-MIMO characteristics.

[0112] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, identifying the failure of the UE to receive the initial PDCCH communication includes identifying the failure of the UE to receive the initial PDCCH communication based on the retransmission modulation and decoding scheme reserved for retransmission.

[0113] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the enhanced HARQ ACK / NACK information includes dedicated bits indicating that the UE has failed to receive the initial PDCCH communication.

[0114] In the sixth aspect, transmitting enhanced HARQ ACK / NACK information alone or in combination with one or more of the first to fifth aspects includes transmitting at least one of a physical uplink control channel (PUCCH) communication that includes enhanced HARQ ACK / NACK information or a physical uplink shared channel multiplexed with enhanced HARQ ACK / NACK information.

[0115] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 500 includes the UE receiving additional initial PDCCH communication from the network node in association with enhanced HARQ ACK / NACK information.

[0116] In the eighth aspect, either alone or in combination with the seventh aspect, the additional initial PDCCH communication is associated with an initial modulation and decoding scheme (MCS) that is not reserved for retransmission.

[0117] although Figure 5 An example box of process 500 is shown, but in some respects, process 500 may include... Figure 5 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 500 may be executed in parallel.

[0118] Figure 6 This is a diagram illustrating an example process 600 performed, for example, at a network node or a device of a network node, according to the present disclosure. Example process 600 is an example in which a device or network node (e.g., network node 404) performs operations associated with an enhanced HARQ ACK / NACK configuration related to initial PDCCH communication.

[0119] like Figure 6 As shown, in some aspects, process 600 may include sending configuration information to the UE indicating an MCS reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication (box 610). For example, a network node (e.g., using...) Figure 8The transmitting component 804 and / or communication manager 806 described herein can send configuration information to the UE indicating that an MCS is reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication, as described above.

[0120] like Figure 6 As further shown, in some aspects, process 600 may include sending initial PDCCH communication to the UE (block 620). For example, a network node (e.g., using...) Figure 8 The transmitting component 804 and / or the communication manager 806 depicted above can transmit initial PDCCH communication to the UE.

[0121] like Figure 6 As further shown, in some aspects, process 600 may include retransmission of the initial PDCCH communication to the UE (box 630). For example, a network node (e.g., using...) Figure 8 The transmitting component 804 and / or the communication manager 806 described above can transmit a retransmission of the initial PDCCH communication to the UE.

[0122] like Figure 6 Further shown, in some aspects, process 600 may include receiving, in association with configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive initial PDCCH communication (box 640). For example, a network node (e.g., using...) Figure 8 The receiving component 802 and / or communication manager 806 depicted in the text may receive, in association with configuration information, enhanced HARQ ACK / NACK information from the UE indicating that the UE has failed to receive initial PDCCH communication, as described above.

[0123] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0124] In a first aspect, the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

[0125] In a second aspect, either alone or in combination with the first aspect, process 600 includes receiving UE capability information from the UE by a network node, indicating UE capabilities associated with an enhanced HARQ ACK / NACK configuration, wherein sending the configuration information includes sending configuration information in association with the UE capabilities.

[0126] In the third aspect, the enhanced HARQ ACK / NACK configuration is associated, alone or in combination with one or more of the first and second aspects, with at least one of the radio frequency conditions or PDCCH MU-MIMO characteristics.

[0127] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the enhanced HARQ ACK / NACK information includes dedicated bits indicating that the UE has failed to receive the initial PDCCH communication.

[0128] In the fifth aspect, receiving enhanced HARQ ACK / NACK information alone or in combination with one or more of the first to fourth aspects includes receiving at least one of physical uplink control channel (PUCCH) communication including enhanced HARQ ACK / NACK information or physical uplink shared channel multiplexed with enhanced HARQ ACK / NACK information.

[0129] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 600 includes sending additional initial PDCCH communication to the UE in association with enhanced HARQ ACK / NACK information by the network node.

[0130] In the seventh aspect, either alone or in combination with the sixth aspect, the additional initial PDCCH communication is associated with the initial modulation and decoding scheme that is not reserved for retransmission.

[0131] although Figure 6 An example box of process 600 is shown, but in some respects, process 600 may include... Figure 6 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 600 may be executed in parallel.

[0132] Figure 7 This is a diagram of an example device 700 for wireless communication according to the present disclosure. Device 700 may be a UE, or a UE may include device 700. In some aspects, device 700 includes a receiving component 702, a transmitting component 704, and / or a communication manager 706 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, communication manager 706 is combined with... Figure 1 The described communication manager 140. As shown, device 700 can communicate with another device 708 (such as a UE or a network node (such as a CU, DU, RU or base station)) using receiving component 702 and transmitting component 704.

[0133] In some respects, device 700 can be configured to perform the functions described herein. Figure 4 One or more operations described herein. Additionally or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as Figure 5 The process is 500. In some respects, Figure 7 The illustrated device 700 and / or one or more components may include a combination Figure 2 One or more components of the described UE. Additionally or alternatively, Figure 7 One or more components shown can be combined Figure 2 Implemented within one or more of the described components. Additionally or alternatively, one or more of the components in the group may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the function or operation of the component.

[0134] Receiver 702 may receive communications from device 708, such as reference signals, control information, data communications, or combinations thereof. Receiver 702 may provide the received communications to one or more other components of device 700. In some aspects, receiver 702 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components of device 700. In some aspects, receiver 702 may include combinations of... Figure 2 The described UE includes one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receiver processors, one or more controllers / processors, one or more memories, or combinations thereof.

[0135] Transmitting component 704 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 708. In some aspects, one or more other components of device 700 can generate communications and provide the generated communications to transmitting component 704 for transmission to device 708. In some aspects, transmitting component 704 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 708. In some aspects, transmitting component 704 may include combinations of... Figure 2The described UE may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, the transmit component 704 may co-located with the receive component 702 in one or more transceivers.

[0136] The communication manager 706 may support the operation of the receiving component 702 and / or the transmitting component 704. For example, the communication manager 706 may receive information associated with configuring the reception of communications by the receiving component 702 and / or the transmission of communications by the transmitting component 704. Additionally or alternatively, the communication manager 706 may generate control information and / or provide control information to the receiving component 702 and / or the transmitting component 704 to control the reception and / or transmission of communications.

[0137] The receiving component 702 can receive configuration information from the network node indicating an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. The receiving component 702 can also receive retransmissions of the initial PDCCH communication from the network node. The communication manager 706 can identify failures in the UE's reception of the initial PDCCH communication. The transmitting component 704 can send enhanced HARQ ACK / NACK information, in association with the configuration information, to the network node indicating failures in the UE's reception of the initial PDCCH communication.

[0138] The transmitting component 704 can send UE capability information to the network node indicating UE capabilities associated with enhanced HARQ ACK / NACK configuration, wherein receiving configuration information includes receiving configuration information associated with UE capabilities. The receiving component 702 can receive additional initial PDCCH communication from the network node in association with enhanced HARQ ACK / NACK information.

[0139] Figure 7 The number and arrangement of components shown are provided as an example. In reality, they can exist in... Figure 7 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 7 The two or more components shown can be implemented within a single component, or Figure 7 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 7 The component collection (one or more components) shown can be executed as described by Figure 7 The other set of components shown performs one or more functions.

[0140] Figure 8This is a diagram illustrating an example device 800 for wireless communication according to the present disclosure. Device 800 may be a network node, or a network node may include device 800. In some aspects, device 800 includes a receiving component 802, a transmitting component 804, and / or a communication manager 806 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, the communication manager 806 is combined with... Figure 1 The described communication manager 150. As shown, device 800 can communicate with another device 808 (such as a UE or a network node (such as a CU, DU, RU or base station)) using receiving component 802 and transmitting component 804.

[0141] In some respects, device 800 can be configured to perform the functions described herein. Figure 4 One or more operations described herein. Additionally or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as Figure 6 The process is 600. In some respects, Figure 8 The illustrated device 800 and / or one or more components may include a combination Figure 2 One or more components of the described network node. Additionally or alternatively, Figure 8 One or more components shown can be combined Figure 2 Implemented within one or more of the described components. Additionally or alternatively, one or more of the components in the group may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the function or operation of the component.

[0142] Receiver 802 may receive communications from device 808, such as reference signals, control information, data communications, or combinations thereof. Receiver 802 may provide the received communications to one or more other components of device 800. In some aspects, receiver 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components of device 800. In some aspects, receiver 802 may include combinations of... Figure 2The described network node may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receiver processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, receiver component 802 and / or transmitter component 804 may include or be included in a network interface. The network interface may be configured to acquire and / or output signals for device 800 via one or more communication links, such as backhaul links, midhaul links, and / or fronthaul links.

[0143] Transmitting component 804 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 808. In some aspects, one or more other components of device 800 can generate communications and provide the generated communications to transmitting component 804 for transmission to device 808. In some aspects, transmitting component 804 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 808. In some aspects, transmitting component 804 may include combinations of... Figure 2 The described network node includes one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, the transmit component 804 may co-located with the receive component 802 in one or more transceivers.

[0144] The communication manager 806 may support the operation of the receiving component 802 and / or the transmitting component 804. For example, the communication manager 806 may receive information associated with configuring the reception of communications by the receiving component 802 and / or the transmission of communications by the transmitting component 804. Additionally or alternatively, the communication manager 806 may generate control information and / or provide control information to the receiving component 802 and / or the transmitting component 804 to control the reception and / or transmission of communications.

[0145] Transmitting component 804 can send configuration information to the UE indicating that an MCS is reserved for retransmission, wherein the configuration information further indicates an enhanced HARQ ACK / NACK configuration associated with the initial PDCCH communication. Transmitting component 804 can send the initial PDCCH communication to the UE. Transmitting component 804 can also send a retransmission of the initial PDCCH communication to the UE. Receiving component 802 can receive, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0146] The receiving component 802 can receive UE capability information from the UE indicating UE capabilities associated with enhanced HARQ ACK / NACK configuration, wherein transmitting configuration information includes transmitting configuration information in association with UE capabilities. The transmitting component 804 can transmit additional initial PDCCH communication to the UE in association with enhanced HARQ ACK / NACK information.

[0147] Figure 8 The number and arrangement of components shown are provided as an example. In reality, they can exist in... Figure 8 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 8 The two or more components shown can be implemented within a single component, or Figure 8 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 8 The component collection (one or more components) shown can be executed as described by Figure 8 The other set of components shown performs one or more functions.

[0148] The following provides an overview of some aspects of this disclosure: Aspect 1: A method for wireless communication performed by a user equipment (UE), the method comprising: the UE receiving from a network node configuration information indicating an enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with an initial physical downlink control channel (PDCCH) communication; the UE receiving a retransmission of the initial PDCCH communication from the network node; the UE identifying a failure of the UE to receive the initial PDCCH communication; and the UE sending, in association with the configuration information, enhanced HARQ ACK / NACK information to the network node indicating the failure of the UE to receive the initial PDCCH communication.

[0149] Aspect 2: According to the method of aspect 1, the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

[0150] Aspect 3: The method according to any one of Aspect 1 or 2, the method further comprising the UE sending UE capability information indicating UE capabilities associated with the enhanced HARQ ACK / NACK configuration to the network node, wherein receiving the configuration information includes receiving the configuration information in association with the UE capabilities.

[0151] Aspect 4: The method according to any one of Aspects 1 to 3, wherein the enhanced HARQ ACK / NACK configuration is associated with at least one of radio frequency conditions or PDCCH multi-user multiple-input multiple-output (MIMO) (MU-MIMO) characteristics.

[0152] Aspect 5: The method according to any one of Aspects 1 to 4, wherein identifying the failure of the UE to receive the initial PDCCH communication includes identifying the failure of the UE to receive the initial PDCCH communication based on a retransmission modulation and decoding scheme reserved for retransmission.

[0153] Aspect 6: The method according to any one of Aspects 1 to 5, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

[0154] Aspect 7: The method according to any one of Aspects 1 to 6, wherein sending the enhanced HARQ ACK / NACK information includes sending at least one of a Physical Uplink Control Channel (PUCCH) communication including the enhanced HARQ ACK / NACK information or a Physical Uplink Shared Channel multiplexed with the enhanced HARQ ACK / NACK information.

[0155] Aspect 8: The method according to any one of Aspects 1 to 7, the method further comprising the UE receiving additional initial PDCCH communication from the network node in association with the enhanced HARQ ACK / NACK information.

[0156] Aspect 9: According to the method of aspect 8, the additional initial PDCCH communication is associated with an initial modulation and decoding scheme that is not reserved for retransmission.

[0157] Aspect 10: A method of wireless communication performed by a network node, the method comprising: sending configuration information to a user equipment (UE) indicating a modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates an enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with an initial physical downlink control channel (PDCCH) communication; sending the initial PDCCH communication to the UE; sending a retransmission of the initial PDCCH communication to the UE by the network node; and receiving, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating a failure of the UE to receive the initial PDCCH communication.

[0158] Aspect 11: According to the method of aspect 10, the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

[0159] Aspect 12: The method of any one of claims 10 or 11, the method further comprising receiving UE capability information from the UE by the network node indicating UE capabilities associated with the enhanced HARQ ACK / NACK configuration, wherein sending the configuration information includes sending the configuration information in association with the UE capabilities.

[0160] Aspect 13: The method according to any one of Aspects 10 to 12, wherein the enhanced HARQ ACK / NACK configuration is associated with at least one of radio frequency conditions or PDCCH multi-user multiple-input multiple-output (MIMO) (MU-MIMO) characteristics.

[0161] Aspect 14: The method according to any one of Aspects 10 to 13, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

[0162] Aspect 15: The method according to any one of Aspects 10 to 14, wherein receiving the enhanced HARQ ACK / NACK information includes at least one of receiving a Physical Uplink Control Channel (PUCCH) communication including the enhanced HARQ ACK / NACK information or a Physical Uplink Shared Channel multiplexed with the enhanced HARQ ACK / NACK information.

[0163] Aspect 16: The method according to any one of Aspects 10 to 15, the method further comprising sending additional initial PDCCH communication to the UE by the network node in association with the enhanced HARQ ACK / NACK information.

[0164] Aspect 17: According to the method of aspect 16, the additional initial PDCCH communication is associated with an initial modulation and decoding scheme that is not reserved for retransmission.

[0165] Aspect 18: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 1 to 9.

[0166] Aspect 19: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 1 to 9.

[0167] Aspect 20: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 9.

[0168] Aspect 21: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by one or more processors to perform the methods described in one or more of aspects 1 to 9.

[0169] Aspect 22: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 1 to 9.

[0170] Aspect 23: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 1 to 9.

[0171] Aspect 24: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being individually or collectively configured to cause the device to perform the method according to one or more of aspects 1 to 9.

[0172] Aspect 25: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 10 to 17.

[0173] Aspect 26: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 10 to 17.

[0174] Aspect 27: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 10 to 17.

[0175] Aspect 28: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by one or more processors to perform the methods described in one or more of aspects 10 to 17.

[0176] Aspect 29: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 10 to 17.

[0177] Aspect 30: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 10 to 17.

[0178] Aspect 31: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being individually or collectively configured to cause the device to perform the method according to one or more of aspects 10 to 17.

[0179] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or from various forms of practice.

[0180] As used herein, the term "component" is intended to be broadly interpreted as hardware or a combination of hardware and at least one of software or firmware. "Software" should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable programs, threads of execution, procedures, or functions, whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. As used herein, a "processor" is implemented in hardware or a combination of hardware and software. It will be apparent that the systems or methods described herein may be implemented in various forms of hardware or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems or methods is not limited in any way. Therefore, the operation and behavior of these systems or methods are described herein without reference to specific software code, as those skilled in the art will understand that the software and hardware can be designed to implement these systems or methods, at least in part, based on the description herein. Unless otherwise stated, a component configured to perform a function means that the component has the capability to perform that function, but it is not necessary for the component to actually perform that function.

[0181] As used in this article, depending on the context, "meeting the threshold" can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0182] As used in this article, the phrase “at least one of” in a list of items refers to any combination of these items, including a single member. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0183] No element, action, or instruction used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are used interchangeably with “one or more.” Similarly, as used herein, the article “described” is intended to include one or more items mentioned in connection with the article “described” and is used interchangeably with “one or more.” Furthermore, as used herein, the terms “group” and “cluster” are intended to include one or more entries and are used interchangeably with “one or more.” If only one item is desired, the phrase “only one” or similar terminology will be used. Moreover, as used herein, the terms “having” and similar terms are intended as open-ended terms that do not limit the elements they modify (e.g., “having” A may also have B). Additionally, the phrase “based on” is intended to mean “based on or otherwise related to” unless otherwise explicitly stated. Furthermore, as used herein, the term “or” is intended to be inclusive when used consecutively and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “either of the two” or “only one of them”). It should be understood that “one or more” is equivalent to “at least one”.

[0184] Although specific combinations of features are set forth in the claims or disclosed in the description, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically stated in the claims or disclosed in the description. The disclosure of various aspects includes each dependent claim in combination with each other claim in the claim set.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: One or more memory units; and One or more processors, which are configured individually or jointly and at least in part based on information stored in the one or more memories, to: Receive configuration information from network nodes indicating the enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial physical downlink control channel (PDCCH) communication; Receive a retransmission of the initial PDCCH communication from the network node; This indicates a failure of the UE to receive the initial PDCCH communication; as well as Associated with the configuration information, an enhanced HARQ ACK / NACK message is sent to the network node instructing the UE to receive the failed initial PDCCH communication.

2. The apparatus of claim 1, wherein the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

3. The apparatus of claim 1, wherein the one or more processors are further configured to send UE capability information to the network node indicating UE capabilities associated with the enhanced HARQ ACK / NACK configuration, and wherein, in order to receive the configuration information, the one or more processors are configured to receive the configuration information in association with the UE capabilities.

4. The apparatus of claim 1, wherein the enhanced HARQ ACK / NACK configuration is associated with at least one of radio frequency conditions or PDCCH multi-user multiple-input multiple-output (MIMO) (MU-MIMO) characteristics.

5. The apparatus of claim 1, wherein, in order to identify the failure of the UE to receive the initial PDCCH communication, the one or more processors are configured to identify the failure of the UE to receive the initial PDCCH communication based on a retransmission modulation and decoding scheme reserved for retransmission.

6. The apparatus of claim 1, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

7. The apparatus of claim 1, wherein, in order to transmit the enhanced HARQ ACK / NACK information, the one or more processors are configured to transmit at least one of a Physical Uplink Control Channel (PUCCH) communication including the enhanced HARQ ACK / NACK information or a Physical Uplink Shared Channel multiplexed with the enhanced HARQ ACK / NACK information.

8. The apparatus of claim 1, wherein the one or more processors are further configured to receive additional initial PDCCH communication from the network node in association with the enhanced HARQ ACK / NACK information.

9. The apparatus of claim 8, wherein the additional initial PDCCH communication is associated with an initial modulation and decoding scheme not reserved for retransmission.

10. An apparatus for wireless communication at a network node, the apparatus comprising: One or more memory units; and One or more processors, which are configured individually or jointly and at least in part based on information stored in the one or more memories, to: Send configuration information to the user equipment (UE) indicating the modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates the enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial physical downlink control channel (PDCCH) communication; Send initial PDCCH communication to the UE; Send a retransmission of the initial PDCCH communication to the UE; as well as The UE receives, in association with the configuration information, an enhanced HARQ ACK / NACK message indicating that the UE has failed to receive the initial PDCCH communication.

11. The apparatus of claim 10, wherein the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

12. The apparatus of claim 10, wherein the one or more processors are further configured to receive from the UE UE UE capability information indicating UE capabilities associated with the enhanced HARQ ACK / NACK configuration, and wherein, in order to transmit the configuration information, the one or more processors are configured to transmit the configuration information in association with the UE capabilities.

13. The apparatus of claim 10, wherein the enhanced HARQ ACK / NACK configuration is associated with at least one of radio frequency conditions or PDCCH multi-user multiple-input multiple-output (MIMO) (MU-MIMO) characteristics.

14. The apparatus of claim 10, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

15. The apparatus of claim 10, wherein, in order to receive the enhanced HARQ ACK / NACK information, the one or more processors are configured to receive at least one of a Physical Uplink Control Channel (PUCCH) communication including the enhanced HARQ ACK / NACK information or a Physical Uplink Shared Channel multiplexed with the enhanced HARQ ACK / NACK information.

16. The apparatus of claim 10, wherein the one or more processors are further configured to send additional initial PDCCH communication to the UE in association with the enhanced HARQ ACK / NACK information.

17. The apparatus of claim 16, wherein the additional initial PDCCH communication is associated with an initial modulation and decoding scheme not reserved for retransmission.

18. A method for wireless communication performed by a user equipment (UE), the method comprising: The UE receives configuration information from the network node indicating the enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial physical downlink control channel (PDCCH) communication; The UE receives a retransmission of the initial PDCCH communication from the network node; The UE identifies the failure of the UE to receive the initial PDCCH communication; as well as The UE, in association with the configuration information, sends an enhanced HARQ ACK / NACK message to the network node instructing the UE to accept the failed initial PDCCH communication.

19. The method of claim 18, wherein the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

20. The method of claim 18, further comprising the UE sending UE capability information to the network node indicating UE capabilities associated with the enhanced HARQ ACK / NACK configuration, wherein receiving the configuration information includes receiving the configuration information in association with the UE capabilities.

21. The method of claim 18, wherein the enhanced HARQ ACK / NACK configuration is associated with at least one of radio frequency conditions or PDCCH multi-user multiple-input multiple-output (MIMO) (MU-MIMO) characteristics.

22. The method of claim 18, wherein identifying the failure of the UE to receive the initial PDCCH communication includes identifying the failure of the UE to receive the initial PDCCH communication based on a retransmission modulation and decoding scheme reserved for retransmission.

23. The method of claim 18, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

24. The method of claim 18, wherein sending the enhanced HARQ ACK / NACK information comprises sending at least one of a Physical Uplink Control Channel (PUCCH) communication including the enhanced HARQ ACK / NACK information or a Physical Uplink Shared Channel multiplexed with the enhanced HARQ ACK / NACK information.

25. The method of claim 18, further comprising the UE receiving additional initial PDCCH communication from the network node in association with the enhanced HARQ ACK / NACK information.

26. The method of claim 25, wherein the additional initial PDCCH communication is associated with an initial modulation and decoding scheme that is not reserved for retransmission.

27. A method for wireless communication performed by a network node, the method comprising: The network node sends configuration information to the user equipment (UE) indicating the modulation and decoding scheme (MCS) reserved for retransmission, wherein the configuration information further indicates the enhanced hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment (ACK / NACK) configuration associated with the initial physical downlink control channel (PDCCH) communication; The network node sends the initial PDCCH communication to the UE; The network node sends a retransmission of the initial PDCCH communication to the UE; as well as The network node receives, in association with the configuration information, enhanced HARQ ACK / NACK information from the UE indicating that the UE has failed to receive the initial PDCCH communication.

28. The method of claim 27, wherein the initial PDCCH communication includes at least one of initial downlink resource granting, initial uplink resource granting, initial self-carrier scheduling resource granting, initial cross-carrier scheduling resource granting, or initial single PDCCH scheduling resources associated with multiple carriers.

29. The method of claim 27, wherein the enhanced HARQ ACK / NACK information includes a dedicated bit indicating the failure of the UE to receive the initial PDCCH communication.

30. The method of claim 27, further comprising sending additional initial PDCCH communication to the UE by the network node in association with the enhanced HARQACK / NACK information, wherein the additional initial PDCCH communication is associated with an initial modulation and decoding scheme not reserved for retransmission.

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