Dynamic DAI counting and HARQ-ACK codebook generation for enhanced PDCCH transmission

Abstract

An apparatus and method for dynamic DAI counting and HARQ‑ACK codebook generation for enhanced PDCCH transmissions are disclosed. The apparatus includes: a processor that generates a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions is used to send first downlink control information (DCI) that schedules a common physical downlink shared channel (PDSCH) transmission, and the common DAI value is generated based on a first reference PDCCH, wherein the first reference PDCCH is one of the PDCCH transmissions; a transmitter that sends the first downlink control information (DCI) with the set of PDCCH transmissions; and a receiver that receives a hybrid automatic repeat request acknowledgment (HARQ‑ACK) codebook with feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

Description

Technical Field

[0001] The subject matter disclosed herein relates generally to wireless communications, and more particularly, but not limited to, apparatus and methods for dynamic downlink assignment indicator (DAI) count and hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook generation for enhanced physical downlink control channel (PDCCH) transmissions. Background Art

[0002] The following abbreviations and acronyms are defined herein, at least some of which are referred to in the specification:

[0003] 3rd Generation Partnership Project (3GPP), 5th Generation (5G), New Radio (NR), 5G Node B / Generalized Node B (gNB), Long Term Evolution (LTE), LTE-Advanced (LTE-A), E-UTRAN Node B / Evolved Node B (eNB), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), Wireless Local Area Network (WLAN), Orthogonal Frequency Division Multiplexing (OFDM), Single Carrier Frequency Division Multiple Access (SC-FDMA), Downlink (DL), Uplink (UL), User Entity / Equipment (UE), Network Equipment (NE), Radio Access Technology (RAT), Receiver or Receiver (RX), Transmitter or Transmitter (T X), Hybrid Automatic Repeat Request (HARQ), Acknowledgement (ACK), Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK), Negative Acknowledgement (NACK), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), Physical Uplink Control Channel (PUCCH), Bandwidth Part (BWP), Control Resource Set (CORESET), Downlink Assignment Index (DAI), Downlink Control Information (DCI), Frequency Division Multiplexing (FDM), Frequency Division Multiple Access (FDMA), Identification (ID), Semi-Persistent Scheduling (SPS), Time Division Multiplexing (TDM), Transmit Receipt Point (TRP), Component Carrier (CC), Frequency Range 1 (FR1), Frequency Range 2 (FR2), Transmission Configuration Indication (TCI).

[0004] In wireless communications such as the 3rd Generation Partnership Project (3GPP) mobile network, the wireless mobile network can provide seamless wireless communication services to wireless communication terminals with mobility, i.e., user equipment (UE). The wireless mobile network can be formed by a plurality of base stations and the base stations can perform wireless communications with the UE.

[0005] 5G New Radio (NR) is the latest in the 3GPP family of standards and supports very high data rates with lower latency compared to its predecessor LTE (4G) technology. Two types of frequency ranges (FR) are defined in 3GPP. Frequencies below the 6GHz range (from 450 to 6000MHz) are called FR1, and the millimeter wave range (from 24.25GHz to 52.6GHz) is called FR2. 5G NR supports both FR1 and FR2 frequency bands.

[0006] Enhancements to multi-TRP / panel transmission are studied, which include improved reliability and stability in the case of ideal and non-ideal backhaul between these TRPs (Transmit Receive Points). A TRP is a device that transmits and receives signals and is controlled by the gNB through the backhaul between the gNB and the TRP. A TRP may also be referred to as a transmit-receive identity, or simply an identity.

[0007] In the conventional scheme defined in Release 15 and Release 16 specifications, only a single PDCCH transmission for one downlink control information (DCI) is supported for DAI count and HARQ-ACK codebook generation. When there is an additional PDCCH transmission, the DAI counter is increased by 1. The HARQ-ACK bits are concatenated in the same order as the DAI count. In detail, the HARQ-ACK bits are concatenated incrementally at a first level indexed by CORESETPool, at a second level indexed by component carrier (CC), and at a third level indexed by PDCCH monitoring opportunity.

[0008] With multiple TRPs, PDCCH may be sent multiple times using different time / frequency / space resources. For one DCI, there may be multiple PDCCH monitoring opportunities. According to the current type 2 HARQ-ACK codebook determination scheme, the downlink assignment indicator (DAI) including the counter DAI (c-DAI) and the total DAI (t-DAI) is counted according to the cumulative number of {serving cell, PDCCH monitoring opportunity} pairs. In the case of multiple PDCCH monitoring opportunities for one DCI, a new scheme for DAI counting and HARQ-ACK codebook generation is proposed. Summary of the invention

[0009] An apparatus and method for dynamic DAI counting and HARQ-ACK codebook generation for enhanced PDCCH transmission are disclosed.

[0010] According to a first aspect, a device is provided, comprising: a processor, which generates a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions is used to send first downlink control information (DCI) scheduling a common physical downlink shared channel (PDSCH) transmission, and the common DAI value is generated based on a first reference PDCCH, wherein the first reference PDCCH is one of the PDCCH transmissions; and a transmitter, which uses the set of PDCCH transmissions to send the first downlink control information (DCI); and a receiver, which receives a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

[0011] According to a second aspect, an apparatus is provided, comprising: a receiver, which receives a set of physical downlink control channel (PDCCH) transmissions that send first downlink control information (DCI), wherein the first DCI sent by the set of PDCCH transmissions schedules a common physical downlink shared channel (PDSCH) transmission, and the set of PDCCH transmissions includes a common downlink assignment indicator (DAI) value generated based on a first reference PDCCH, and wherein the first reference PDCCH is one of the PDCCH transmissions; a processor, which generates a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook with feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions; and a transmitter, which sends the HARQ-ACK codebook.

[0012] According to a third aspect, a method is provided, comprising: generating, by a processor, a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions is used to send first downlink control information (DCI) for scheduling common physical downlink shared channel (PDSCH) transmissions, and the common DAI value is generated based on a first reference PDCCH, wherein the first reference PDCCH is one of the PDCCH transmissions; sending, by a transmitter, the first downlink control information (DCI) using the set of PDCCH transmissions; and receiving, by a receiver, a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

[0013] According to a fourth aspect, a method is provided, comprising: receiving, by a receiver, a set of physical downlink control channel (PDCCH) transmissions that send first downlink control information (DCI), wherein the first DCI sent by the set of PDCCH transmissions schedules a common physical downlink shared channel (PDSCH) transmission, and the set of PDCCH transmissions includes a common downlink assignment indicator (DAI) value generated based on a first reference PDCCH, and wherein the first reference PDCCH is one of the PDCCH transmissions; generating, by a processor, a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions; and sending the HARQ-ACK codebook by a transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] A more specific description of the embodiments is provided below with reference to specific embodiments shown in the accompanying drawings. Given that these drawings depict only some embodiments and are therefore not to be considered limiting in scope, these embodiments are described and explained below with additional specificity and detail through the use of the accompanying drawings, in which:

[0015] Figure 1 is a schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure;

[0016] Figure 2 is a schematic block diagram illustrating components of a user equipment (UE) according to some embodiments of the present disclosure;

[0017] Figure 3 is a schematic block diagram illustrating components of a network equipment (NE) according to some embodiments of the present disclosure;

[0018] Figure 4 is a schematic diagram illustrating an example of a HARQ time process according to some embodiments of the present disclosure;

[0019] Figure 5A is a schematic diagram illustrating an example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure;

[0020] Figure 5B is a schematic diagram illustrating another example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure;

[0021] Figure 6 is a schematic diagram illustrating another example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure;

[0022] Figure 7is a schematic diagram illustrating another example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure;

[0023] Figure 8 is a flow chart illustrating steps of DAI count and HARQ-ACK codebook generation for enhanced PDCCH transmission by NE according to some embodiments of the present disclosure; and

[0024] Fig. 9 is a flow chart illustrating steps of DAI count and HARQ-ACK codebook generation for enhanced PDCCH transmission by a UE according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0025] As will be appreciated by those skilled in the art, multiple aspects of the embodiments may be embodied as systems, devices, methods or program products. Therefore, the embodiments may take the form of full hardware embodiments, full software embodiments (including firmware, resident software, microcode, etc.) or embodiments combining software and hardware aspects.

[0026] Furthermore, one or more embodiments may take the form of a program product embodied in one or more computer-readable storage devices storing machine-readable code, computer-readable code, and / or program code, hereinafter referred to as “code.” The storage devices may be tangible, non-transitory, and / or non-transmitting.

[0027] References in this specification to "one embodiment", "an embodiment", "an example", "some embodiments", "some examples", or similar language mean that a particular feature, structure, or characteristic is included in at least one embodiment or example. Therefore, instances of the phrases "in one embodiment", "in an example", "in some embodiments", and similar language throughout the specification may, but not necessarily, all refer to the same embodiment. It may or may not include all disclosed embodiments. Unless expressly specified otherwise, features, structures, elements, or characteristics described in conjunction with one or some embodiments also apply to other embodiments. Unless expressly specified otherwise, the terms "include", "comprise", "have", and variations thereof mean "including but not limited to".

[0028] Unless expressly specified otherwise, the enumerated listing of items does not imply that any or all of the items are mutually exclusive.Unless expressly specified otherwise, the terms "a", "an" and "the" also mean "one or more".

[0029] Throughout the disclosure, the terms "first", "second", "third", etc. are used as terms that are used only to refer to related devices, components, procedural steps, etc., without indicating any spatial or temporal order, unless otherwise explicitly specified. For example, "first device" and "second device" may refer to two separately formed devices, or two parts or components of the same device. In some cases, for example, "first device" and "second device" may be the same and may be named arbitrarily. Similarly, the "first step" of a method or process may be performed or carried out after or simultaneously with the "second step".

[0030] It should be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more associated listed items. For example, "A and / or B" may refer to any of the following three combinations: only A exists, only B exists, and A and B exist together. The character " / " generally indicates an "or" relationship of associated items. However, this may also include an "and" relationship of associated items. For example, "A / B" means "A or B", which may also include the co-existence of A and B, unless the context indicates otherwise.

[0031] In addition, the features, structures or characteristics of the described embodiments may be combined in any suitable manner. In the following description, a plurality of specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of the embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more specific details or using other methods, components, materials, etc. In other instances, known structures, materials or operations are not shown or described in detail to avoid confusing aspects of the embodiments.

[0032] Aspects of various embodiments are described below with reference to schematic flow charts and / or schematic block diagrams of methods, apparatus, systems, and program products. It will be understood that each step in the schematic flow charts and / or schematic block diagrams, and combinations of steps in the schematic flow charts and / or schematic block diagrams, can be implemented by code. The code can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that instructions executed by a processor of a computer or other programmable data processing device can create a device for implementing the functions or actions specified in the schematic flow charts and / or schematic block diagrams.

[0033] The code may also be stored in a storage device that can direct a computer, other programmable data processing device, or other device to function in a specific manner so that the instructions stored in the storage device produce an article of manufacture including instructions that implement the functions or actions specified in the schematic flowchart and / or schematic block diagram.

[0034] The schematic flow charts and / or schematic block diagrams in the accompanying drawings illustrate the architecture, functions and operations of possible implementations of different devices, systems, methods and program products according to various embodiments. In this regard, each step in the schematic flow chart and / or schematic block diagram can represent a module, segment or portion of a code, which includes one or more executable instructions for implementing the code of the specified logical function. However, those skilled in the relevant art will recognize that the flow chart is not necessarily practiced in the order shown and can be practiced without one or more specific steps or practiced using other steps not shown.

[0035] It should also be noted that in some alternative implementations, the functions annotated in the identified blocks may not appear in the order annotated in the drawings. For example, two blocks shown in succession may actually be executed simultaneously, or may sometimes be executed in the reverse order, depending on the functions involved. Other steps and methods that are equivalent in function, logic, or effect to one or more blocks or portions thereof of the illustrated drawings may be envisioned.

[0036] Figure 1 1 is a schematic diagram illustrating a wireless communication system. It depicts an embodiment of a wireless communication system 100. In one embodiment, the wireless communication system 100 may include a user equipment (UE) 102 and a network equipment (NE) 104. Figure 1 A specific number of UEs 102 and NEs 104 are depicted in FIG. 1 , but those skilled in the art will recognize that any number of UEs 102 and NEs 104 may be included in the wireless communication system 100 .

[0037] UE 102 may be referred to as a remote device, a remote unit, a subscriber unit, a mobile station, a mobile station, a user, a terminal, a mobile terminal, a fixed terminal, a subscriber station, a user terminal, a device, an apparatus or other terminology used in the art.

[0038] In one embodiment, the UE 102 may be an autonomous sensor device, an alarm device, an actuator device, a remote control device, etc. In some other embodiments, the UE 102 may include a computing device such as a desktop computer, a laptop computer, a personal digital assistant (PDA), a tablet computer, a smart phone, a smart TV (e.g., a TV connected to the Internet), a set-top box, a game console, a security system (including security cameras), a vehicle-mounted computer, a network device (e.g., a router, a switch, a modem), etc. In some embodiments, the UE 102 includes a wearable device such as a smart watch, a fitness band, an optical head-mounted display, etc. The UE 102 may communicate directly with one or more of the NEs 104.

[0039] NE 104 may also be referred to as a base station, access point, access terminal, base, Node-B, eNB, gNB, home Node-B, relay node, device, equipment, or any other term used in the art. Throughout this specification, references to base stations may refer to any of the above reference types of network devices 104 such as eNBs and gNBs.

[0040] The NEs 104 may be distributed over a geographic area. The NEs 104 are typically part of a radio access network that includes one or more controllers communicatively coupled to one or more corresponding NEs 104. The radio access network is typically communicatively coupled to one or more core networks, which may be coupled to other networks, such as the Internet and a public switched telephone network. These and other elements of the radio access and core networks are not illustrated, but are well known to those of ordinary skill in the art.

[0041] In one embodiment, the wireless communication system 100 complies with 3GPP 5G New Radio (NR). In some embodiments, the wireless communication system 100 complies with the 3GPP protocol, wherein the NE 104 transmits on the DL using an OFDM modulation scheme, and the UE 102 transmits on the UL using an SC-FDMA scheme or an OFDM scheme. However, more generally, the wireless communication system 100 may implement some other open or proprietary communication protocols, such as WiMAX. The present disclosure is not intended to be limited to any particular wireless communication system architecture or protocol implementation.

[0042] NE 104 can serve multiple UEs 102 within a service area, such as a cell (or cell sector) or more cells, via wireless communication links. NE 104 sends DL communication signals to serve UE 102 in time, frequency, and / or spatial domains.

[0043] A communication link is provided between the NE 104 and the UEs 102a, 102b, 102c, and 102d, which may be, for example, a NR UL or DL ​​communication link. Some UEs 102 may communicate with different radio access technologies (RATs) such as NR and LTE simultaneously. A direct or indirect communication link may be provided between two or more NEs 104.

[0044] The NE 104 may also include one or more transmit receive points (TRPs) 104a. In some embodiments, the network device may be a gNB 104 that controls multiple TRPs 104a. In addition, there is a backhaul between two TRPs 104a. In some other embodiments, the network device may be a TRP 104a controlled by a gNB.

[0045] A communication link is provided between the NE 104, 104a and the UE 102, 102a, respectively, which may be, for example, a NR UL / DL communication link. Some UEs 102, 102a may communicate simultaneously with different radio access technologies (RATs) such as NR and LTE.

[0046] In some embodiments, a UE 102a may be able to simultaneously communicate with two or more TRPs 104a utilizing a non-ideal backhaul. A TRP may be a transmission point of a gNB. The UE and / or (one or more) TRPs may use multiple beams. The two or more TRPs may be TRPs of different gNBs, or may be the same gNB. That is, different TRPs may have the same cell ID or different cell IDs. The terms "TRP" and "transmit-receive identity" may be used interchangeably throughout the disclosure.

[0047] At least some of the disclosed techniques or examples may be applicable to scenarios with or without multiple TRPs, as long as multiple PDCCH transmissions are supported. In a single TRP scenario, for example, with multiple panels, multiple PDCCH transmissions from one TRP may be performed for one DCI transmission. In some other examples, multiple PDCCH transmissions are also possible for a single TRP with a single panel.

[0048] Figure 2 2 is a schematic block diagram illustrating components of a user equipment (UE) according to one embodiment. UE 200 may include a processor 202, a memory 204, an input device 206, a display 208, and a transceiver 210. In some embodiments, the input device 206 and the display 208 are combined into a single device, such as a touch screen. In some embodiments, UE 200 may not include any input device 206 and / or display 208. In various embodiments, UE 200 may include one or more processors 202 and may not include an input device 206 and / or display 208.

[0049] In one embodiment, the processor 202 may include any known controller capable of executing computer-readable instructions and / or capable of performing logical operations. For example, the processor 202 may be a microcontroller, a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), an auxiliary processing unit, a field programmable gate array (FPGA), or a similar programmable controller. In some embodiments, the processor 202 executes instructions stored in the memory 204 to perform the methods and routines described herein. The processor 202 is communicatively coupled to the memory 204 and the transceiver 210.

[0050] In one embodiment, memory 204 is a computer-readable storage medium. In some embodiments, memory 204 includes volatile computer storage media. For example, memory 204 may include RAM, including dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), and / or static RAM (SRAM). In some embodiments, memory 204 includes non-volatile computer storage media. For example, memory 204 may include a hard drive, flash memory, or any other suitable non-volatile computer storage device. In some embodiments, memory 204 includes both volatile and non-volatile computer storage media. In some embodiments, memory 204 stores data related to the triggering condition for sending the measurement report to the network device. In some embodiments, memory 204 also stores program code and related data.

[0051] In one embodiment, input device 206 may include any known computer input device, including a touch panel, buttons, keyboard, stylus, microphone, etc. In some embodiments, input device 206 may be integrated with display 208, for example, as a touch screen or similar touch-sensitive display.

[0052] In one embodiment, the display 208 may include any known electronically controllable display or display device. The display 208 may be designed to output visual, audio and / or tactile signals.

[0053] In one embodiment, the transceiver 210 is configured to communicate wirelessly with a network device. In some embodiments, the transceiver 210 includes a transmitter 212 and a receiver 214. The transmitter 212 is used to send UL communication signals to the network device, and the receiver 214 is used to receive DL communication signals from the network device.

[0054] The transmitter 212 and the receiver 214 may be any suitable type of transmitter and receiver. Although only one transmitter 212 and one receiver 214 are shown, the transceiver 210 may have any suitable number of transmitters 212 and receivers 214. For example, in some embodiments, the UE 200 includes multiple transmitter 212 and receiver 214 pairs for communicating on multiple wireless networks and / or radio frequency bands, and each transmitter 212 and receiver 214 pair is configured to communicate on a different wireless network and / or radio frequency band.

[0055] Figure 33 is a schematic block diagram illustrating components of a network device (NE) 300 according to one embodiment. The NE 300 may include a processor 302, a memory 304, an input device 306, a display 308, and a transceiver 310. As can be appreciated, in some embodiments, the processor 302, the memory 304, the input device 306, the display 308, and the transceiver 310 may be similar to the processor 202, the memory 204, the input device 206, the display 208, and the transceiver 210 of the UE 200, respectively.

[0056] In some embodiments, the processor 302 controls the transceiver 310 to send a DL signal or data to the UE 200. The processor 302 may also control the transceiver 310 to receive a UL signal or data from the UE 200. In another example, the processor 302 may control the transceiver 310 to send a DL signal containing various configuration data to the UE 200.

[0057] In some embodiments, the transceiver 310 includes a transmitter 312 and a receiver 314. The transmitter 312 is used to send DL communication signals to the UE 200, and the receiver 314 is used to receive UL communication signals from the UE 200.

[0058] The transceiver 310 may communicate with multiple UEs 200 simultaneously. For example, the transmitter 312 may send DL communication signals to the UE 200. As another example, the receiver 314 may simultaneously receive UL communication signals from the UE 200. The transmitter 312 and the receiver 314 may be any suitable type of transmitter and receiver. Although only one transmitter 312 and one receiver 314 are shown, the transceiver 310 may have any suitable number of transmitters 312 and receivers 314. For example, the NE 300 may serve multiple cells and / or cell sectors, wherein the transceiver 310 includes a transmitter 312 and / or a receiver 314 for each cell or cell sector.

[0059] The set of PDCCH monitoring opportunities for DCI format scheduled PDSCH reception or SPS PDSCH release is defined as the union of the PDCCH monitoring opportunities of the active DL BWPs across the configured serving cells. The PDCCH monitoring opportunities are indexed in ascending order of the start time of the search space set associated with the PDCCH monitoring opportunity. The cardinality of the set of PDCCH monitoring opportunities defines the total number of PDCCH monitoring opportunities.

[0060] The value of the Counter Downlink Assignment Indicator (c-DAI) field in the DCI format represents the cumulative number of {serving cell, PDCCH monitoring opportunity} pairs in which there is a PDSCH reception or SPS PDSCH release associated with the DCI format, up to the current serving cell and the current PDCCH monitoring opportunity, first in ascending order of the serving cell index and then in ascending order of the PDCCH monitoring opportunity index. If, for the active DL BWP of the serving cell, no CORESETPoolIndex is provided for the UE or a CORESETPoolIndex value of 0 is provided for one or more first CORESETs and a CORESETPoolIndex value of 1 is provided for one or more second CORESETs, and the UE is provided with ACKNACKFeedbackMode=JointFeedback, the value of the counter DAI is in the order of the first CORSET, followed by the second CORESET with the same serving cell index and the same PDCCH monitoring opportunity index.

[0061] The value of the total DAI (t-DAI) in the DCI format represents the total number of {serving cell, PDCCH monitoring opportunity} pairs in which there is a PDSCH reception or SPS PDSCH release associated with the DCI format, until the current PDCCH monitoring opportunity and updated from the PDCCH monitoring opportunity to the PDCCH monitoring opportunity. If, for the active DL BWP of the serving cell, no CORESETPoolIndex is provided for the UE or a CORESETPoolIndex value of 0 is provided for one or more first CORESETs and a CORESETPoolIndex value of 1 is provided for one or more second CORESETs, and ACKNACKFeedbackMode=JointFeedback is provided for the UE, the {serving cell, PDCCH monitoring opportunity} pairs are counted for both the first CORESET and the second CORESET in the total DAI.

[0062] If the UE sends HARQ-ACK information in time slot n and for any PUCCH format, the UE will be a total of O ACK HARQ-ACK information bits determine The HARQ-ACK bits are first concatenated in CORESETPool index order, then in CC index order, and finally in ascending order of PDCCH monitoring opportunity index.

[0063] That is, for PDCCH without multiple transmissions, the mechanisms for DAI counting and HARQ-ACK codebook generation are well defined. However, they cannot be directly applied to PDCCH with multiple transmissions.

[0064] Figure 4 An example of a HARQ time process for a PDCCH with multiple transmissions is illustrated. In the example, a PDSCH 420 is scheduled by a PDCCH 410 with multiple transmissions, i.e., a first PDCCH 412 in slot n and a second PDCCH 414 in slot n+1. That is, multiple PDCCH transmissions 412 and 414 are used to send a DCI that schedules the PDSCH transmission 420. With respect to the last PDCCH (second PDCCH 414) of the multiple transmissions, when provided, the PDSCH is sent using a time domain resource assignment field in a DCI format with a scheduled PDSCH reception or SPS PDSCH release and a slot offset K0 provided by pdsch-aggregationFactor. In response to PDSCH reception or SPS PDSCH release, the PUCCH transmission time instance (e.g., ACK / NACK codebook 430) with HARQ-ACK information is determined by K1, i.e., the PDSCH-to-HARQ_feedback timing indicator field value.

[0065] In the present disclosure, for the case where PDSCH is scheduled by PDCCH with multiple transmissions, a scheme for generating DAI count and HARQ-ACK codebook based on reference PDCCH is proposed. In some embodiments, multiple transmissions can be achieved through multiple TRPs or transmit-receive identifiers and / or multiple panels.

[0066] Because it is assumed that the same DCI content is used for multiple PDCCH transmissions to achieve combined gain, a PDCCH with multiple transmissions for DCI can be counted only once for DAI counting. One of the PDCCH transmissions can be determined as a reference PDCCH according to some predefined rules. Based on different assumptions about the reference PDCCH, various schemes for DAI counting and HARQ-ACK codebook generation are proposed. In addition, considering different requirements, the reference PDCCH used for DAI counting and HARQ-ACK codebook generation can be the same or different.

[0067] The first PDCCH transmission as a reference PDCCH for both DAI counting and HARQ-ACK codebook generation

[0068] Figure 5A is a schematic diagram illustrating an example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure; and Figure 5B is a schematic diagram illustrating another example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure.

[0069] In an example, the first PDCCH in multiple transmissions can be used as a reference PDCCH for a PDCCH with multiple transmissions for both DAI counting and HARQ-ACK codebook generation. The DAI value is generated based on the reference PDCCH, and the feedback information bits are arranged based on the reference PDCCH.

[0070] For type 2 HARQ-ACK codebook generation, when determining the value of the counter DAI and the total DAI, the PDCCH in the first PDCCH monitoring opportunity, i.e., the time slot, is used as the reference PDCCH. The remaining PDCCHs of multiple transmissions are not used for counting. For all DCIs with and without multiple transmissions, the relevant DAI is incrementally accumulated at a first level indexed by CORESETPool, at a second level indexed by CC, and at a third level indexed by PDCCH monitoring opportunity, where the DAI counting scheme in Releases 15 and 16 (DAI counting for DCIs without multiple transmissions) is reused as much as possible.

[0071] exist Figure 5A In the example shown, four DCIs (i.e., DCI 1 510A, DCI 2 510C, DCI 3 510B, and DCI 4 510D) are transmitted by two TRPs (i.e., TRP1 and TRP2) on two CCs (i.e., CC1 and CC2). DCI 1 510A and DCI 3 510B are each transmitted using four PDCCH transmissions on CC1, where two of the four PDCCH transmissions for DCI 1 510A (512A and 514A) are transmitted from TRP1 in time slots 1 and 2, respectively, and the other two PDCCH transmissions for DCI 1 (516A, 518A) are transmitted from TRP2 in time slots 3 and 4, respectively. Two of the four PDCCH transmissions for DCI 3 510B (512B and 514B) are sent from TRP1 in slots 5 and 6, respectively, and the other two PDCCH transmissions for DCI 3 (516B, 518B) are sent from TRP2 in slots 7 and 8, respectively. DCI 2 510C and DCI 4 510D are each sent without multiple PDCCH transmissions, e.g., by a single transmission in slots 2 and 6, respectively.

[0072] In the example, the first PDCCH in the multiple transmissions is used as the reference PDCCH for DAI counting. That is, based on the reference PDCCH 512A, which is the first of the multiple PDCCH transmissions for DCI 1, the (c-DAI, t-DAI) value for DCI 1 is (0, 0), and the (c-DAI, t-DAI) value for DCI 2 is (1, 1) through cumulative calculation; based on the reference PDCCH 512B, 512B for DCI 3, the (c-DAI, t-DAI) value for DCI 3 is (2, 2), and the (c-DAI, t-DAI) value for DCI 4 is (3, 3).

[0073] In this example, a reference PDCCH for DCI is determined as the first of a plurality of PDCCH transmission lists for DCI, the list being ordered at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET) or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

[0074] It is worth noting that for a DCI with multiple transmissions, the DAI values ​​in the PDCCHs of the other multiple transmissions, eg, 514A, 516A, and 518A, are the same as the DAI value in the reference PDCCH, eg, 512A.

[0075] In this example, for a DCI with multiple transmissions, the DAI value is generated based on its reference PDCCH; and for a DCI without multiple transmissions, the DAI value is generated based on the PDCCH that transmits the DCI. The DAI values ​​for all DCIs (DCIs with and without multiple transmissions) are determined (or counted) based on a list of DCIs, which are based on the reference PDCCH for DCIs with multiple transmissions and the PDCCH transmission for DCIs without multiple transmissions, and are sorted at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET) or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

[0076] For HARQ-ACK codebook generation, because the DCI only schedules one PDSCH, there is only one HARQ-ACK bit corresponding to one DCI with multiple transmissions. The PDCCH in the first PDCCH monitoring opportunity, that is, the time slot, is used as a reference PDCCH to determine the HARQ HCAK bit position for the PDSCH scheduled by the PDCCH with multiple transmissions. The ACK / NACK bits corresponding to all DCIs are incrementally concatenated at a first level indexed according to the CORESETPool, at a second level indexed according to the CC, and at a third level alone according to the PDCCH monitoring opportunity. That is, the ACK / NACK bits corresponding to all DCIs are concatenated based on the above-ordered list of DCIs.

[0077] exist Figure 5A In the example shown, the HARQ-ACK codebooks may be concatenated as: {ACK / NACK 1, ACK / NACK 2, ACK / NACK 3, ACK / NACK 4}.

[0078] The position of ACK / NACK 1 is determined by the reference PDCCH 512A having the smallest PDCCH monitoring opportunity index among the multiple transmissions. In this example, since its corresponding DCI 510A is determined only after receiving 4 PDCCH transmissions for DCI 1 in slot 4, ACK / NACK 1 is obtained later than ACK / NACK 2, but ACK / NACK 1 is concatenated before ACK / NACK 2 based on the reference PDCCH 512A for DCI 1 and the PDCCH 510C for DCI 2.

[0079] In this example, the reference PDCCH or the first PDCCH is the PDCCH having the lowest PDCCH monitoring occasion index because a time division multiplexing (TDM) scheme is used for a PDCCH having multiple transmissions.

[0080] In some other examples, spatial division multiplexing (SDM) and frequency division multiplexing (FDM) schemes may also be used for a PDCCH with multiple transmissions, where the PDCCH with multiple transmissions may be sent from multiple TRPs using SDM / FDM.

[0081] For Figure 5B In the SDM / FDM scheme shown, the reference PDCCH or the first PDCCH may be the PDCCH with the smallest index in a plurality of PDCCH transmission lists, the lists being ordered at a first level according to the control resource set pool (CORESETPool index), at a second level according to the component carrier (CC) index, and at a third level according to the PDCCH monitoring opportunity index. Figure 5BIn the example shown, DCI 1 510A is transmitted twice using SDM / FDM, with 2 PDCCHs, i.e., 512A and 514A, transmitted from TRP1 and TRP2, respectively, on the same CCE for SDM or different CCEs for FDM. In this case, because the PDCCH monitoring opportunity, i.e., the first time slot, is the same for both transmissions, new dimensions, i.e., CC index and CORESETPool index, are used for sorting to define the reference PDCCH. For example, because PDCCH 512A from TRP1 has a smaller CORESETPool index than PDCCH 514A from TRP2, PDCCH 512A from TRP1 is sorted in front of PDCCH 514A from TRP2. Therefore, PDCCH 512A from TRP1 is the first PDCCH and can be determined as the reference PDCCH for DAI counting and HARQ-ACK codebook generation.

[0082] exist Figure 5B In the example shown, the HARQ-ACK codebooks may be concatenated as: {ACK / NACK 1, ACK / NACK 2, ACK / NACK 3, ACK / NACK 4}.

[0083] In the present disclosure, the CORESETPool index is used to represent the TRP index. For some cases, it may not be configured because it is optional signaling for only one CORESET. For the case where the CORESETPool index is not configured, the CORESET index can be used to define the reference PDCCH. In the case of a configuration with multiple CORESETs and one TCI state for one CORESET, the CORESET index can be used. Alternatively, the TCI state index of multiple activated TCI states can be used to define the reference PDCCH. It can be used in the case of a configuration with multiple TCI states for a single CORESET.

[0084] The first PDCCH transmission of the PDCCH as a reference for DAI counting and as a reference for HARQ-ACK codebook The last PDCCH transmission of the generated reference PDCCH

[0085] Figure 6 is a schematic diagram illustrating further examples of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure.

[0086] In this example, two reference PDCCHs may be defined, namely a first reference PDCCH for DAI counting and a second reference PDCCH for HARQ-ACK codebook generation. The first PDCCH in multiple transmissions may be used as a reference PDCCH for DAI counting of a PDCCH with multiple transmissions (ie, the first reference PDCCH), and the last PDCCH in multiple transmissions may be used as a reference PDCCH for HARQ-ACK codebook generation (ie, the second reference PDCCH) of a PDCCH with multiple transmissions.

[0087] The last PDCCH in multiple transmissions can also be used as the reference PDCCH for the DAI count of PDCCHs with multiple transmissions. However, this may not be desirable for gNB implementation, as the gNB has to determine the DAI value based on later PDCCH numbers. Figure 6 The diagram is similar to Figure 5A An example of DCI / PDCCH transmission. Figure 6 As shown in , the gNB has to determine the DAI value for PDCCH 512A transmitted in slot 1 based on the scheduled PDCCH numbers in slots 2, 3, and 4 on multiple CCs. Therefore, in this example, the first PDCCH of multiple transmissions (e.g., 512A and 512B) is still used as the reference PDCCH for DAI counting.

[0088] For HARQ-ACK codebook generation, the PDCCH in the last PDCCH monitoring occasion, i.e., time slot, can be used as a reference PDCCH to determine the HARQ ACK bit position for a PDSCH scheduled by a PDCCH with multiple transmissions. The ACK / NACK bits corresponding to all DCIs are incrementally concatenated at a first level indexed according to CORESETPool, then at a second level indexed according to CC, and finally at a third level indexed according to the PDCCH monitoring occasion.

[0089] exist Figure 6 In the example shown, the HARQ-ACK codebook can be concatenated as: {ACK / NACK2, ACK / NACK 1, ACK / NACK 4, ACK / NACK3}.

[0090] The position of ACK / NACK 1 is determined by the second reference PDCCH 518A having the largest PDCCH monitoring opportunity among multiple transmissions. Here, because its corresponding DCI 510A is determined only after receiving 4 PDCCH transmissions for DCI 1 in time slot 4, and DCI 2 510C is determined after the transmission in time slot 2, ACK / NACK 1 is obtained later than ACK / NACK 2. Therefore, in such a case, ACK / NACK 1 is concatenated after ACK / NACK 2.

[0091] In this example, the first and second reference PDCCHs, i.e., the first and last PDCCHs, may be PDCCHs with the minimum and maximum PDCCH monitoring opportunity indexes because the TDM scheme is used for PDCCHs with multiple transmissions. In some other examples, SDM and FDM schemes may also be used for PDCCHs with multiple transmissions. The first or last PDCCH may be defined as the PDCCH with the minimum or maximum index in the PDCCH list, respectively, where the PDCCHs with multiple transmissions are sorted incrementally at a first level according to the CORESETPool index, then at a second level according to the CC index, and then at a third level according to the PDCCH monitoring opportunity index.

[0092] In this example, the DAI value for DCI is generated based on the first reference PDCCH for DCI, and the feedback information bits are arranged based on the second reference PDCCH for DCI. The DAI value for all DCI is determined similarly to the previous example. The ACK / NACK bits corresponding to all DCI (DCI with and without multiple transmissions) are cascaded according to a DCI list, which is based on the second reference PDCCH for DCI with multiple transmissions and the PDCCH transmission of DCI without multiple transmissions, in order to be sorted according to the first level of the control resource set pool (CORESETPool), in order to be sorted according to the second level of the component carrier (CC) index, and in order to be sorted according to the third level of the PDCCH monitoring opportunity index.

[0093] and Figure 5A and Figure 5BSimilar to the example shown in , in this example and some other examples, the CORESETPool index is also used to represent the TRP index. For some cases, it may not be configured because it is only optional signaling for a CORESET. For the case where the CORESETPool index is not configured, the CORESET index can be used to define the reference PDCCH. In the case of a configuration with multiple CORESETs and one TCI state for one CORESET, the CORESET index can be used. Alternatively, the TCI state index of multiple activated TCI states can be used to define the reference PDCCH. It can be used in the case of a configuration with multiple TCI states for a single CORESET.

[0094] Individual DAI count and HARQ-ACK codebook generation for PDCCH with multiple transmissions

[0095] Figure 7 is a schematic diagram illustrating yet another example of DAI counting and HARQ-ACK codebook generation according to some embodiments of the present disclosure.

[0096] When different ACK / NACK feedback time processes are used for PDSCH scheduled by PDCCH with and without multiple transmissions, separate DAI counts and HARQ-ACK codebook generation may be used in case of PDSCH scheduled by PDCCH with and without multiple transmissions.

[0097] For DAI count, the same scheme in Release 15 and Release 16 can be used for PDCCH without multiple transmissions. For PDCCH with multiple transmissions, a reference PDCCH has to be determined. Similar to the previous example, the first PDCCH can be used as the reference PDCCH for the generation of DAI count and HARQ-ACK codebook for PDCCH with multiple transmissions. Figure 7 The diagram is similar to Figure 5A An example of DCI / PDCCH transmission. Figure 7As shown, DAI counting is performed separately for PDCCHs without multiple transmissions (e.g., DCI 2 and DCI 4) and for PDCCHs with multiple transmissions (e.g., DCI 1 and DCI 3). For example, based on the reference PDCCH, the (c-DAI, t-DAI) value for DCI 2 is (0, 0), and the (c-DAI, t-DAI) value for DCI 4 is (1, 1); the (c-DAI, t-DAI) value for DCI 1 is (0, 0), and the (c-DAI, t-DAI) value for DCI 3 is (1, 1). For a PDCCH with multiple transmissions, the reference PDCCH for DAI counting is the PDCCH with the first monitoring opportunity, for example, PDCCH 512A for DCI 1. For example, the DAI values ​​in other PDCCHs of multiple transmissions of 514A, 516A, and 518A are the same as the DAI value of the reference PDCCH 512A of DCI 1. The first PDCCH used as the reference PDCCH in the example may be defined as the PDCCH with the smallest index, wherein the PDCCHs with multiple transmissions are incrementally ordered at a first level according to the CORESETPool index, then at a second level according to the CC index, and then at a third level according to the smallest PDCCH monitoring opportunity index.

[0098] In this example, the DAI value of the DCI without multiple transmissions is independent from the DAI value of the DCI with multiple transmissions, and they are determined separately.

[0099] For HARQ-ACK codebook generation, two subcodebooks are generated separately for PDSCH scheduled by PDCCH with multiple transmissions and without multiple transmissions: a subcodebook with feedback information bits for DCI with multiple transmissions, and a subcodebook with feedback information bits for DCI without multiple transmissions. Then, the two subcodebooks are cascaded. In one example, a subcodebook corresponding to a PDCCH without multiple transmissions can be generated and placed in front of a subcodebook corresponding to a PDCCH with multiple transmissions. This is friendly to the HARQ timeline because the HACK / NACK bits for the PDSCH corresponding to the PDCCH with multiple transmissions may be generated relatively late due to receiving multiple PDCCH transmissions. In some other examples, the two subcodebooks are cascaded in an order determined based on the codebook generation for DCI with multiple transmissions and the reference PDCCH for a single PDCCH transmission of DCI without multiple transmissions.

[0100] exist Figure 7In the example shown, the order of subcodebook 2 corresponding to the PDCCH with multiple transmissions is {ACK / NACK1, ACK / NACK3}, and the order of subcodebook 1 corresponding to the PDCCH without multiple transmissions is {ACK / NACK2, ACK / NACK4}; and subcodebook 2 is concatenated to subcodebook 1. In some other examples, subcodebook 2 may be referred to as a first subcodebook, and subcodebook 1 may be referred to as a second subcodebook.

[0101] In this example, the HARQ-ACK codebooks may be concatenated as: {ACK / NACK 2, ACK / NACK 4, ACK / NACK 1, ACK / NACK 3}.

[0102] Alternatively, the concatenation order of the two subcodebooks may be defined based on the order of the first PDCCH in each subcodebook, where the first PDCCH corresponding to the subcodebook of multiple transmissions is represented by the first of the reference PDCCHs used for HARQ-ACK codebook generation. Figure 7 As shown, for subcodebook 2, there are two reference PDCCHs 512A and 512B for HARQ-ACK codebook generation. The first reference PDCCH for subcodebook 2 is the PDCCH in the first time slot, for example, 512A. The first PDCCH for subcodebook 1 is the PDCCH in the second time slot, for example, 510C. Therefore, subcodebook 1 corresponding to a PDCCH without multiple transmissions is cascaded to subcodebook 2 corresponding to a PDCCH with multiple transmissions.

[0103] Therefore, the HARQ-ACK codebook can alternatively be concatenated as: {ACK / NACK 1, ACK / NACK 3, ACK / NACK 2, ACK / NACK 4}.

[0104] For a subcodebook corresponding to a PDCCH with multiple transmissions, the HARQ-ACK bits are concatenated according to the order of the reference PDCCH. Figure 7 As shown, ACK / NACK 3 is concatenated to ACK / NACK 1 because the reference PDCCH 512B for ACK / NACK 3 is in the fifth slot, while the reference PDCCH 512A for ACK / NACK 1 is in the first slot.

[0105] Although in Figure 7It is shown in FIG that the first PDCCH for multiple transmissions of one DCI is used as a reference PDCCH for both DAI count and HARQ-ACK codebook generation for the PDCCH with multiple transmissions, but it is possible to implement separate DAI count and HARQ-ACK codebook generation in which the first PDCCH is used as a reference PDCCH for DAI count and the last PDCCH is used as a reference PDCCH for HARQ-ACK codebook generation.

[0106] Figure 8 is a flow chart illustrating steps of DAI count and HARQ-ACK codebook generation for enhanced PDCCH transmission by NE according to some embodiments of the present disclosure.

[0107] At step 802, the processor 302 of the NE 300 generates a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions is used to send first downlink control information (DCI) scheduling a common physical downlink shared channel (PDSCH) transmission, and the common DAI value is generated based on a first reference PDCCH, which is one of the PDCCH transmissions.

[0108] At step 804, the transmitter 312 of the NE 300 sends first downlink control information (DCI) with a set of PDCCH transmissions.

[0109] At step 806, the receiver 314 of the NE 300 receives a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook with feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

[0110] The first reference PDCCH and the second reference PDCCH may be determined from a list of PDCCH transmissions, the list being ordered at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity. The first one in the list may be determined as the first reference PDCCH and the second reference PDCCH; or the first one in the list may be determined as the first reference PDCCH and the second reference PDCCH.

[0111] Fig. 9 is a flow chart illustrating steps of DAI count and HARQ-ACK codebook generation for enhanced PDCCH transmission by a UE according to some embodiments of the present disclosure.

[0112] At step 902, the receiver 214 of the UE 200 receives a set of physical downlink control channel (PDCCH) transmissions that send first downlink control information (DCI), wherein the first DCI sent with the set of PDCCH transmissions schedules a common physical downlink shared channel (PDSCH) transmission, and the set of PDCCH transmissions includes a common downlink assignment indicator (DAI) value, which is generated based on a first reference PDCCH, and wherein the first reference PDCCH is one of the PDCCH transmissions.

[0113] At step 904, the processor 202 of the UE 200 generates a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

[0114] At step 906, the transmitter 212 of the UE 200 sends a HARQ-ACK codebook.

[0115] Various embodiments and / or examples are disclosed to provide exemplary and explanatory information to enable those skilled in the art to put the present disclosure into practice. Unless otherwise specifically indicated, features or components disclosed with reference to one embodiment or example also apply to all embodiments or examples.

[0116] Embodiments may be practiced in other specific forms. The described embodiments should be considered in all respects as merely illustrative and not restrictive. Therefore, the scope of the present invention is indicated by the appended claims rather than by the foregoing description. All changes within the meaning and scope of the equivalents of the claims are encompassed within their scope.

Claims

1. A network device (NE), comprising: a processor that generates a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions are used to send first downlink control information (DCI) that schedules a common physical downlink shared channel (PDSCH) transmission, and the common DAI value is generated based on a first reference PDCCH, wherein the first reference PDCCH is one of the PDCCH transmissions; a transmitter that transmits the first downlink control information (DCI) with the set of PDCCH transmissions; and A receiver is provided that receives a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

2. The NE according to claim 1, wherein: The first reference PDCCH and the second reference PDCCH are determined from a list of PDCCH transmissions, the list of PDCCH transmissions being sorted at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

3. The NE according to claim 2, wherein: The first one in the list is determined as the first reference PDCCH and the second reference PDCCH.

4. The NE according to claim 2, wherein: The first one in the list is determined as the first reference PDCCH; and the last one in the list is determined as the second reference PDCCH.

5. The NE according to claim 1, wherein: The transmitter further transmits a second DCI with a single PDCCH transmission; the processor generates a second DAI value based on the single PDCCH transmission; and the common DAI value and the second DAI value are determined based on a list of DCIs.

6. The NE according to claim 5, wherein: The second DAI value is independent of the common DAI value used for the first DCI; and the list of DCIs includes a first sub-list for the first DCI and a second sub-list for the second DCI.

7. The NE according to claim 5, wherein: The processor generates a plurality of common DAI values ​​for a plurality of first DCIs and a plurality of second DAI values ​​for a plurality of second DCIs, the list of DCIs comprising a combined list of the first DCIs and the second DCIs; and the DAI value is determined according to the combined list of DCIs.

8. The NE according to claim 1, wherein: The transmitter further transmits a second DCI with a single PDCCH transmission; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the list of DCIs.

9. The NE according to claim 8, wherein: The transmitter further transmits a plurality of first DCIs and a plurality of second DCIs; the list of DCIs comprises a combined list of the first DCIs and the second DCIs; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the combined list of DCIs.

10. The NE according to claim 8, wherein: The HARQ-ACK codebook includes a first subcodebook having feedback information bits for the first DCI having multiple transmissions, and a second subcodebook having feedback information bits for the second DCI not having multiple transmissions.

11. The NE according to claim 10, wherein: The first sub-codebook is concatenated after the second sub-codebook.

12. The NE according to claim 10, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a first reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

13. The NE according to claim 10, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a second reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

14. The NE according to any one of claims 5 to 13, wherein: The list of DCIs is based on a reference PDCCH for the first DCI and one of a single PDCCH transmission for the second DCI, and is ordered at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

15. A user equipment (UE), comprising: a receiver that receives a set of physical downlink control channel (PDCCH) transmissions that transmit first downlink control information (DCI), wherein the first DCI transmitted with the set of PDCCH transmissions schedules a common physical downlink shared channel (PDSCH) transmission, and the set of PDCCH transmissions includes a common downlink assignment indicator (DAI) value generated based on a first reference PDCCH, and wherein the first reference PDCCH is one of the PDCCH transmissions; a processor that generates a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions; and A transmitter sends the HARQ-ACK codebook.

16. The UE according to claim 15, wherein: The first reference PDCCH and the second reference PDCCH are determined from a list of PDCCH transmissions, the list of PDCCH transmissions being sorted at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

17. The UE according to claim 16, wherein: The first one in the list is determined as the first reference PDCCH and the second reference PDCCH.

18. The UE according to claim 16, wherein: The first one in the list is determined as the first reference PDCCH; and the last one in the list is determined as the second reference PDCCH.

19. The UE according to claim 15, wherein: The receiver further receives a second DCI with the single PDCCH transmission including a second DAI value based on the single PDCCH transmission; and the common DAI value and the second DAI value are determined based on a list of DCIs.

20. The UE according to claim 19, wherein: The second DAI value is independent of the common DAI value used for the first DCI; and the list of DCIs includes a first sub-list for the first DCI and a second sub-list for the second DCI.

21. The UE according to claim 19, wherein: The receiver further receives a plurality of first DCIs including a plurality of common DAI values ​​and a plurality of second DCIs including a plurality of second DAI values; the list of DCIs includes a combined list of the first DCIs and the second DCIs; and the DAI value is determined according to the combined list of DCIs.

22. The UE according to claim 15, wherein: The receiver further receives a second DCI with a single PDCCH transmission; and feedback information bits of the HARQ-ACK codebook are concatenated based on the list of DCIs.

23. The UE according to claim 22, wherein: The receiver further receives a plurality of first DCIs and a plurality of second DCIs; the list of DCIs includes a combined list of the first DCIs and the second DCIs; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the combined list of DCIs.

24. The UE according to claim 22, wherein: The HARQ-ACK codebook includes a first subcodebook having feedback information bits for the first DCI having multiple transmissions, and a second subcodebook having feedback information bits for the second DCI not having multiple transmissions.

25. The UE according to claim 24, wherein: The first sub-codebook is concatenated after the second sub-codebook.

26. The UE according to claim 24, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a first reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

27. The UE according to claim 24, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a second reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

28. The UE according to any one of claims 19 to 27, wherein: The list of DCIs is based on a reference PDCCH for the first DCI and one of a single PDCCH transmission for the second DCI, and is ordered at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

29. A method performed by a network device (NE), the method comprising: generating, by a processor, a common downlink assignment indicator (DAI) value for a set of physical downlink control channel (PDCCH) transmissions, wherein the set of PDCCH transmissions are used to send first downlink control information (DCI) scheduling a common physical downlink shared channel (PDSCH) transmission, and the common DAI value is generated based on a first reference PDCCH, wherein the first reference PDCCH is one of the PDCCH transmissions; sending, by a transmitter, the first downlink control information (DCI) using the set of PDCCH transmissions; as well as A hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook is received by a receiver with feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions.

30. The method of claim 29, wherein: The first reference PDCCH and the second reference PDCCH are determined from a list of PDCCH transmissions, the list of PDCCH transmissions being sorted at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

31. The method according to claim 30, wherein: The first one in the list is determined as the first reference PDCCH and the second reference PDCCH.

32. The method of claim 30, wherein: The first one in the list is determined as the first reference PDCCH; and the last one in the list is determined as the second reference PDCCH.

33. The method of claim 29, wherein: The transmitter further sends a second DCI with a single PDCCH transmission; the processor generates a second DAI value based on the single PDCCH transmission; and the common DAI value and the second DAI value are determined based on the list of DCIs.

34. The method of claim 33, wherein: The second DAI value is independent of the common DAI value used for the first DCI; and the list of DCIs includes a first sub-list for the first DCI and a second sub-list for the second DCI.

35. The method of claim 33, wherein: The processor generates a plurality of common DAI values ​​for a plurality of first DCIs and a plurality of second DAI values ​​for a plurality of second DCIs, the list of DCIs comprising a combined list of the first DCIs and the second DCIs; and the DAI value is determined according to the combined list of DCIs.

36. The method of claim 29, wherein: The transmitter further transmits a second DCI with a single PDCCH transmission; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the list of DCIs.

37. The method of claim 36, wherein: The transmitter further transmits a plurality of first DCIs and a plurality of second DCIs; the list of DCIs comprises a combined list of the first DCIs and the second DCIs; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the combined list of DCIs.

38. The method of claim 36, wherein: The HARQ-ACK codebook includes a first subcodebook having feedback information bits for the first DCI having multiple transmissions, and a second subcodebook having feedback information bits for the second DCI not having multiple transmissions.

39. The method of claim 38, wherein: The first sub-codebook is concatenated after the second sub-codebook.

40. The method of claim 38, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a first reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

41. The method of claim 38, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a second reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

42. The method according to any one of claims 33 to 41, wherein: The list of DCIs is based on a reference PDCCH for the first DCI and one of the single PDCCH transmissions for the second DCI, and is ordered at a first level indexed by a control resource set pool (CORESETPool), or a control resource set (CORESET) or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

43. A method performed by a user equipment (UE), the method comprising: receiving, by a receiver, a set of physical downlink control channel (PDCCH) transmissions transmitting first downlink control information (DCI), wherein the first DCI transmitted with the set of PDCCH transmissions schedules a common physical downlink shared channel (PDSCH) transmission, and the set of PDCCH transmissions includes a common downlink assignment indicator (DAI) value generated based on a first reference PDCCH, and wherein the first reference PDCCH is one of the PDCCH transmissions; generating, by a processor, a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook having feedback information bits arranged based on a second reference PDCCH, wherein the second reference PDCCH is one of the PDCCH transmissions; and The HARQ-ACK codebook is sent by a transmitter.

44. The method of claim 43, wherein: The first reference PDCCH and the second reference PDCCH are determined from a list of PDCCH transmissions, the list of PDCCH transmissions being sorted at a first level indexed by a control resource set pool (CORESETPool) or a control resource set (CORESET), or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

45. The method of claim 44, wherein: The first one in the list is determined as the first reference PDCCH and the second reference PDCCH.

46. ​​The method of claim 44, wherein: The first one in the list is determined as the first reference PDCCH; and the last one in the list is determined as the second reference PDCCH.

47. The method of claim 43, wherein: The receiver further receives a second DCI with the single PDCCH transmission including a second DAI value based on the single PDCCH transmission; and the common DAI value and the second DAI value are determined based on a list of DCIs.

48. The method of claim 47, wherein: The second DAI value is independent of the common DAI value used for the first DCI; and the list of DCIs includes a first sub-list for the first DCI and a second sub-list for the second DCI.

49. The method of claim 47, wherein: The receiver further receives a plurality of first DCIs including a plurality of common DAI values ​​and a plurality of second DCIs including a plurality of second DAI values; the list of DCIs includes a combined list of the first DCIs and the second DCIs; and the DAI value is determined according to the combined list of DCIs.

50. The method of claim 43, wherein: The receiver further receives a second DCI with a single PDCCH transmission; and feedback information bits of the HARQ-ACK codebook are concatenated based on the list of DCIs.

51. The method of claim 50, wherein: The receiver further receives a plurality of first DCIs and a plurality of second DCIs; the list of DCIs includes a combined list of the first DCIs and the second DCIs; and the feedback information bits of the HARQ-ACK codebook are concatenated based on the combined list of DCIs.

52. The method of claim 50, wherein: The HARQ-ACK codebook includes a first subcodebook having feedback information bits for the first DCI having multiple transmissions and a second subcodebook having feedback information bits for the second DCI not having multiple transmissions.

53. The method of claim 52, wherein: The first sub-codebook is concatenated after the second sub-codebook.

54. The method of claim 52, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a first reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

55. The method of claim 52, wherein: The first subcodebook and the second subcodebook are concatenated in an order determined based on a second reference PDCCH of the first DCI and a single PDCCH transmission of the second DCI.

56. A method according to any one of claims 47 to 55, wherein: The list of DCIs is based on the reference PDCCH for the first DCI and one of the single PDCCH transmissions for the second DCI, and is ordered at a first level indexed by a control resource set pool (CORESETPool), or a control resource set (CORESET) or an activated transmission configuration indication (TCI) state, at a second level indexed by a component carrier (CC), and at a third level indexed by a PDCCH monitoring opportunity.

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