Acknowledgement report for control information reception

Abstract

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system and an Internet of Things (IoT) technology. The disclosure can be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, networked car, health care, digital education, smart retail, security and safety services. A method and apparatus for handling acknowledgement reporting of reception of control information. A method for a user equipment (UE) to receive a physical downlink control channel (PDCCH) includes determining an order of priority for receiving the PDCCH, and receiving the PDCCH based on the order of priority. PDCCH reception of a first search space set (SSS) is prioritized over PDCCH reception of a second SSS or a third SSS. Based on a configuration, PDCCH reception of the second SSS is prioritized over PDCCH reception of the third SSS. PDCCH reception of the first SSS includes a first downlink control information (DCI) format. PDCCH reception of the second SSS includes a second DCI format scheduling a groupcast physical downlink shared channel (PDSCH) reception. PDCCH reception of the third SSS includes a third DCI format scheduling a unicast PDSCH reception.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to a wireless communication system, and more particularly, the present disclosure relates to an acknowledgement report for control information reception. BACKGROUND

[0002] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a '5G Network'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed for use in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, a technology for coordination between cells, a cooperative multi-cell transmission technique, an interference mitigation and cancellation technology, a network slicing technology, and the like. In a 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi-carrier (FBMC), a non-orthogonal multiple access (NOMA), and a sparse code multiple access (SCMA) as an advanced access technology have been developed.

[0003] The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged as a new paradigm for the IoT. As technology elements, such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology", and "security technology" have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and the like have been recently researched. Such an IoT environment can provide intelligent Internet technology services that create a new value through collection and analysis of data generated from connected things. The IoT can be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances, and advanced medical services through the convergence and combination of existing information technology (IT) and various industrial applications.

[0004] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, techniques such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication can be implemented by beamforming, MIMO, and array antennas. Application of a cellular network to a M2M communication machine type communication (MTC), and Internet of Things (IoT) also can be considered as an example of the above-described convergence.

[0005] Fifth generation (5G) or new radio (NR) mobile communication is recently gathering more and more momentum with all the global technology activities from various candidate technologies from industry and academia. The candidate implementations of 5G / NR mobile communication include massive antenna technology providing beamforming gain and supporting increased capacity from a conventional cellular band to a high frequency, a new waveform (e.g., a new radio access technology (RAT)) flexibly accommodating various services / applications having different requirements, a new multiple access scheme supporting massive connection, and the like. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] With the development of communication systems, there is a need for a method and apparatus for reporting an acknowledgement of reception of control information.

[0008] TECHNICAL SOLUTION

[0009] The present disclosure relates to reception of control channels and data channels, and to acknowledgement reporting in a control channel in response to reception of control information or data information in a respective control channel or data channel.

[0010] In one embodiment, a method for a user equipment (UE) to receive a physical downlink control channel (PDCCH) is provided. The method includes determining a prioritization of receiving the PDCCH, and receiving the PDCCH based on the prioritization. PDCCH reception of a first search space set (SSS) is prioritized over PDCCH reception of a second SSS or PDCCH reception of a third SSS. Based on a configuration, PDCCH reception of the second SSS is prioritized or deprioritized over PDCCH reception of the third SSS. PDCCH reception of the first SSS is according to a common search space (CSS) and includes a first downlink control information (DCI) format. PDCCH reception of the second SSS is according to the CSS and includes a second DCI format scheduling a groupcast physical downlink shared channel (PDSCH) reception. PDCCH reception of the third SSS is according to a UE-specific search space (USS) and includes a third DCI format scheduling a unicast PDSCH reception.

[0011] In another embodiment, a UE is provided. The UE includes a processor configured to determine a priority order of PDCCH reception, and a transceiver operably connected to the processor and configured to receive the PDCCH based on the priority order. The PDCCH reception of a first SSS is prioritized over the PDCCH reception of a second SSS or the PDCCH reception of a third SSS. The PDCCH reception of the second SSS is prioritized or not prioritized over the PDCCH reception of the third SSS based on a configuration. The PDCCH reception of the first SSS is according to a CSS and includes a first DCI format. The PDCCH reception of the second SSS is according to the CSS and includes a second DCI format scheduling a groupcast PDSCH reception. The PDCCH reception of the third SSS is according to a USS and includes a third DCI format scheduling a unicast PDSCH reception.

[0012] In yet another embodiment, a base station is provided. The base station includes a processor configured to determine a priority order of PDCCH transmission, and a transceiver operably connected to the processor and configured to transmit the PDCCH based on the priority order. The PDCCH transmission of a first SSS is prioritized over the PDCCH transmission of a second SSS or the PDCCH transmission of a third SSS. The PDCCH transmission of the second SSS is prioritized or not prioritized over the PDCCH transmission of the third SSS based on a configuration. The PDCCH transmission of the first SSS is according to a CSS and includes a first DCI format. The PDCCH transmission of the second SSS is according to the CSS and includes a second DCI format scheduling a groupcast PDSCH transmission. The PDCCH transmission of the third SSS is according to a USS and includes a third DCI format scheduling a unicast PDSCH transmission.

[0013] Other technical features can be readily apparent to one skilled in the art from the following figures, descriptions, and claims.

[0014] Before undertaking a detailed description of the present application, it can be advantageous to set forth definitions of certain terms and phrases used throughout this patent document. The term “coupled” and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms “transmit,” “receive,” and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication. The terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation. The term “or” is inclusive, meaning and / or. The phrase “associated with,” as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have a property of, have relations with, or the like. The term “controller” means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or a combination of hardware and software and / or firmware. The functionality associated with any particular controller can be centralized or distributed, whether locally or remotely. The phrase “at least one of” followed by a list of two or more items, means that any of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed. For example, “at least one of A, B, and C” means that the use of A or B or C or the use of both A and B or A and C or B and C or A and B and C is employed.

[0015] Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium. The terms “application” and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof that can be suitably implemented in appropriate computer readable program code. The phrase “computer readable program code” includes any type of computer code, including source code, object code, and executable code. The phrase “computer readable medium” includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A “non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links. Non-transitory computer readable media include media that can be permanently stored in that the medium itself does not change over time as well as media that can store data temporarily as well as over time such as a rewritable optical disc or an erasable memory device.

[0016] Definitions for other certain words and phrases are provided throughout this patent document. Those of ordinary skill in the art will understand that such definitions apply to this patent document, and that such definitions can be employed to enable others to understand the disclosure. Any headings used herein are for organizational purposes only and are not meant to be used to construe the disclosure.

[0017] Advantages

[0018] According to embodiments of the present disclosure, a method and apparatus for reporting acknowledgement of reception of control information are provided. Therefore, improvement of communication system efficiency can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals represent like parts:

[0020] Figure 1 An example wireless network, in accordance with embodiments of the present disclosure, is illustrated;

[0021] Figure 2 An example base station (BS), in accordance with embodiments of the present disclosure, is illustrated;

[0022] Figure 3 An example UE, in accordance with embodiments of the present disclosure, is illustrated;

[0023] Figure 4 An example wireless transmit path, in accordance with embodiments of the present disclosure, is illustrated;

[0024] Figure 5 An example wireless receive path, in accordance with embodiments of the present disclosure, is illustrated;

[0025] Figure 6 A block diagram of an example transmitter structure using orthogonal frequency division multiplexing (OFDM), in accordance with embodiments of the present disclosure, is illustrated;

[0026] Figure 7 A block diagram of an example receiver structure using OFDM, in accordance with embodiments of the present disclosure, is illustrated;

[0027] Figure 8 An example encoding procedure for downlink control information (DCI) format, in accordance with embodiments of the present disclosure, is illustrated;

[0028] Figure 9 An example decoding procedure for DCI format for a UE, in accordance with embodiments of the present disclosure, is illustrated;

[0029] Figure 10 An example method for a UE to provide hybrid automatic repeat request (HARQ) acknowledgement (ACK) information for detection of DCI format A, in accordance with embodiments of the present disclosure, is illustrated;

[0030] Figure 11 An example method for a UE to provide HARQ-ACK information, in accordance with embodiments of the present disclosure, is illustrated;

[0031] Figure 12An example method of a UE including HARQ-ACK information for detecting DCI format A in a Type-1 HARQ-ACK codebook according to embodiments of the present disclosure is shown;

[0032] Figure 13 An example method of a UE including HARQ-ACK information for detecting DCI format A in a Type-2 HARQ-ACK codebook according to embodiments of the present disclosure is shown;

[0033] Figure 14 An example method of a UE providing HARQ-ACK information with a negative acknowledgement (NACK) value according to embodiments of the present disclosure is shown;

[0034] Figure 15 An example method of a UE allocating PDCCH candidates and non-overlapping CCEs to a search space set according to embodiments of the present disclosure is shown;

[0035] Figure 16 A structure of a user equipment (UE) according to embodiments of the present disclosure is shown; and

[0036] Figure 17 A structure of a base station according to embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0037] The following discussion is presented to enable a better understanding of the principles of the disclosure and its practical applications, and to provide Figures 1 to 17 The principles of the disclosure discussed below are merely exemplary and should not be construed as limiting the scope of the disclosure in any way. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0038] The following documents are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v16.2.0, "NR; Physical channels and modulation," 3GPP TS 38.212 v16.2.0, "NR; Multiplexing and Channel coding," 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Control," 3GPP TS 38.214 v16.2.0, "NR; Physical Layer Procedures for Data," 3GPP TS 38.321 v16.1.0, "NR; Medium Access Control (MAC) protocol specification," and 3GPP TS 38.331 v16.1.0, "NR; Radio Resource Control (RRC) protocol specification."

[0039] To meet the demand for wireless data traffic having increased since deployment of fourth generation (4G) communication systems, efforts have been made to develop and deploy an improved fifth generation (5G) or pre-5G / NR communication system. Therefore, the 5G or pre-5G communication system is also called a "beyond 4G network" or a "post long term evolution (LTE) system."

[0040] The 5G communication system is considered to be implemented in a frequency band of 3 GHz or more, e.g., a 28 GHz or 60 GHz band, to accomplish a higher data rate, or in a frequency band of 6 GHz or less, to accomplish robust coverage and mobility support. To reduce propagation loss of radio waves and increase a transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam forming, large scale antenna techniques are discussed in the 5G communication system.

[0041] In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation and the like.

[0042] The discussion of 5G systems and frequency bands associated therewith is for reference because certain embodiments of the present disclosure can be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure can be used in conjunction with any frequency band. For example, aspects of the present disclosure can also apply to 5G communication systems that can use terahertz (THz) bands, 6G or even higher versions of deployment.

[0043] Depending on the network type, the term "base station" (BS) can refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmit point (TP), transmit-receive point (TRP), an enhanced base station (eNodeB or eNB), gNB, macrocell, femtocell, WiFi access point (AP), satellite, or other wireless-enabled devices. A base station can provide wireless access to a 5G 3GPP New Radio Interface / Access (NR) network, LTE, LTE-Advanced (LTE-A) network, High Speed Packet Access (HSPA) network, Wi-Fi 802.11a / b / g / n / ac network, etc. in accordance with one or more wireless communication protocols. The terms "BS," "gNB," and "TRP" can be used interchangeably herein to refer to a component (or collection of components) of a network that provides wireless access to remote terminals. Additionally, depending on the network type, the term "user equipment" (UE) can refer to any component such as a mobile station, subscriber station, remote terminal, wireless terminal, receive point, vehicle, or user device. For example, a UE can be a mobile telephone, smartphone, monitoring device, alarm device, fleet management device, asset tracking device, automobile, desktop computer, entertainment device, infotainment device, vending machine, electric meter, water meter, gas meter, security device, sensor device, appliance, etc. A UE can also refer to a remote wireless device that accesses a gNB wirelessly, whether the UE is a mobile device like a mobile telephone or smartphone or is generally considered a stationary device like a desktop computer or vending machine. A UE can also be an automobile, truck, van, drone, or any similar machine or device within these machines.

[0044] The following description Figures 1-3 Various embodiments implemented in wireless communication systems are described. Figures 1-3The description of the different embodiments of the disclosure is not meant to imply physical or architectural limitations to the manner in which different embodiments can be implemented. Different embodiments of the disclosure can be implemented in any suitably-arranged communication system.

[0045] Figure 1 An example wireless network 100 according to embodiments of the disclosure is illustrated. Figure 1 The illustrated embodiment of the wireless network 100 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the disclosure.

[0046] As Figure 1 illustrated, the wireless network 100 includes base stations BS 101 (e.g., gNB), BS 102, and BS 103. BS 101 communicates with BS 102 and BS 103. BS 101 is also in communication with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0047] BS 102 provides wireless broadband access to the network 130 for first multiple user equipment (UE) within a coverage area 120 of the BS 102. The first multiple UEs include a UE 111, which can be located in a small business (SB); a UE 112, which can be located in an enterprise (E); a UE 113, which can be located in a WiFi hotspot (HS); a UE 114, which can be located in a first residence (R); a UE 115, which can be located in a second residence (R); and a UE 116, which can be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, or the like. BS 103 provides wireless broadband access to the network 130 for a second multiple UEs within a coverage area 125 of the BS 103. The second multiple UEs include the UE 115 and the UE 116. In some embodiments, one or more of the BSs 101-103 can communicate with each other and with the UEs 111-116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication techniques.

[0048] Dotted lines show the approximate extents of the coverage areas 120 and 125, which are shown as approximately circular for the purposes of illustration and explanation only. It is clearly understood that the coverage areas associated with BSs, such as the coverage areas 120 and 125, can have other shapes, including irregular shapes, depending upon the configuration of the BS and variations in the radio environment associated with natural and man-made obstructions in accordance.

[0049] As described in more detail below, one or more of the UEs 111-116 include circuitry, programing, or a combination thereof, for control information reception acknowledgement reporting. In certain embodiments, the BSs 101-103 include circuitry, programing, or a combination thereof, for receiving control information reception acknowledgement reporting.

[0050] Although Figure 1 various changes can be made to Figure 1 wireless network. For example, the wireless network can include any number of BSs and any number of UEs in any suitable arrangement. In addition, BS 101 could communicate directly with any number of UEs and provide those UEs access to network 130. Similarly, each BS 102-103 could communicate directly with network 130 and provide UEs access to network 130. Further, BSs 101, 102, and / or 103 could provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0051] Figure 2 An example BS 102 according to embodiments of the present disclosure is illustrated. Figure 2 The illustrated embodiment of BS 102 is for illustration only, Figure 1 BSs 101 and 103 can have the same or similar configuration. However, BSs come in a wide variety of configurations, and Figure 2 do not limit the scope of this disclosure to any particular implementation of BSs.

[0052] As Figure 2 illustrated, BS 102 includes multiple antennas 205a-205n, multiple radio frequency (RF) transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. BS 102 also includes controller / processor 225, memory 230, and backhaul or network interface 235.

[0053] The RF transceivers 210a-210n receive, from the antennas 205a-205n, incoming RF signals such as signals transmitted by UEs in the wireless network 100. The RF transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 220, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 220 transmits the processed baseband signals to the controller / processor 225 for further processing.

[0054] The TX processing circuitry 215 receives analog or digital data (such as voice data, web data, e-mail, or interactive video game data) from the controller / processor 225. The TX processing circuitry 215 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from the TX processing circuitry 215 and up-convert the signals to RF signals at the desired transmit frequency for transmission through the antennas 205a-205n.

[0055] The controller / processor 225 can include one or more processors or other processing devices to manage the overall operation of the BS 102. For example, the controller / processor 225 can control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 can support additional functions as well, such as more advanced wireless communication functions. For instance, the controller / processor 225 can support acknowledgement reporting of control information reception. The controller / processor 225 can support any of a number of

[0056] The controller / processor 225 is also capable of executing programs and other processes resident in the memory 230, such as an OS. The controller / processor 225 can move data into or out of memory 230 as required by the processes being executed. In certain embodiments, the controller / processor 225 supports the reception of acknowledgement reporting of control information reception. For example, the controller / processor 225 can move data into or out of memory 230 as required by the processes being executed.

[0057] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the BS 102 to communicate with other devices or systems over a backhaul connection or network. The network interface 235 can support communication over any suitable wired or wireless connection. For example, when the BS 102 is implemented as part of a cellular communication system (such as a system that supports 5G / NR, LTE, or LTE-A), the network interface 235 can allow the BS 102 to communicate with other BSs over a wired or wireless backhaul connection. When the BS 102 is implemented as an access point, the network interface 235 can allow the BS 102 to communicate with other BSs over a wired or wireless local area network or with a larger network (such as the Internet) through a wired or wireless connection. The network interface 235 includes any suitable structure supporting communication over a wired or wireless connection, such as an Ethernet or RF transceiver.

[0058] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, while another portion of memory 230 may include flash memory or other ROM.

[0059] although Figure 2 An example of BS 102 is shown, but it is possible to modify it. Figure 2 Various changes can be made. For example, BS 102 may include... Figure 2 Each component can be any number shown. As a specific example, an access point may include multiple network interfaces 235, and the controller / processor 225 may support routing functionality to route data between different network addresses. As another specific example, although shown as a single instance including TX processing circuitry 215 and a single instance including RX processing circuitry 220, BS 102 may include multiple instances of each (e.g., one per RF transceiver). Furthermore, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0060] Figure 3 An example UE 116 according to an embodiment of this disclosure is shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 This disclosure is not intended to limit the scope to any particular implementation of the UE.

[0061] like Figure 3 As shown, UE 116 includes an antenna 305, an RF transceiver 310, a TX processing circuit 315, a microphone 320, and a receive (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor 340, an input / output (I / O) interface (IF) 345, an input device 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0062] RF transceiver 310 receives an input RF signal transmitted by a BS of wireless network 100 from antenna 305. RF transceiver 310 down-converts the input RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (e.g., for voice data) or processor 340 for further processing (e.g., for web browsing data).

[0063] The TX processing circuitry 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, e-mail, or interactive video game data) from the processor 340. The TX processing circuitry 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuitry 315 and up-converts the baseband or IF signal to RF signals that are transmitted via the antenna 305.

[0064] The processor 340 can include one or more processors or other processing devices and execute instructions stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 can control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315 in accordance with well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0065] The processor 340 is also capable of executing other processes and programs stored in the memory 360, such as a process for beam management. The processor 340 can move data into or out of the memory 360 as required by the processes executing on the processor 340. In some embodiments, the processor 340 is configured to execute the applications 362 based on the OS 361 or in response to signals received from BSs or an operator. The processor 340 is also coupled to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0066] The processor 340 is also coupled to the input device 350. The input device 350 allows a user to communicate information to the UE 116. The input device 350 can be a keyboard, a touch screen, a microphone, a mouse, a track ball, or a voice recognition device, among other devices. For example, the input device 350 can include voice recognition processing, allowing a user to input voice commands. In another example, the input device 350 can include a touch panel, a (digital) pen sensor, a key, or an ultrasonic input device. The touch panel can recognize touch input in at least one scheme, such as a capacitive scheme, a pressure sensitive scheme, a resistive scheme, or an infrared scheme.

[0067] The processor 340 is also coupled to the display 355. The display 355 can be a liquid crystal display, a light emitting diode display, or other display capable of rendering text and / or at least limited graphics, such as from web sites.

[0068] Memory 360 is coupled to the processor 340. Part of the memory 360 could include random access memory (RAM), and another part of the memory 360 could include

[0069] Although Figure 3 one example of a UE 116 is shown, various changes can be made Figure 3 to Figure 3 the components of the UE 116. For example, various components in the UE 116 can be combined, further subdivided, or omitted and additional components can be added according to particular needs. As a particular example, the processor 340 could be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Also, while Figure 3 the UE 116 is illustrated as a mobile phone or smart phone, a UE can be configured to operate as other types of mobile or stationary devices.

[0070] Figure 4 and Figure 5 A transmit path 400 and a receive path 500 according to embodiments of the present disclosure are illustrated. In the following description, a transmit path 400 can be described as implemented in a BS (such as the BS 102), while a receive path 500 can be described as implemented in a UE (such as the UE 116). It will be appreciated that the receive path 500 can be implemented in a BS and the transmit path 400 can be implemented in a UE. In some embodiments, the receive path 500 is configured to support acknowledgement reporting for control information reception as described in embodiments of the present disclosure. Figure 4 Figure 5 The transmit path 400 as illustrated in FIG. 4 includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, a size N inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P-to-S) block 420, an add cyclic prefix block 425, and a

[0071] The receive path 500 as illustrated in FIG. 5 includes a down-converter (DC) 555, a remove cyclic prefix block 560, a serial-to-parallel (S-to-P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel-to-serial (P-to-S) block 575, and a channel decoding and demodulation block 580. Figure 4 Figure 5

[0072] As Figure 4 ​​​As shown, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as a low-density parity check (LDPC) coding), and modulates the input bits (such as with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel block 410 converts (such as de-multiplexes) the serial modulated symbols to parallel data in order to generate N parallel symbol streams, where N is the IFFT / FFT size used in the BS 102 and the UE 116. The size N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate time-domain output signals. The parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from the size N IFFT block 415 in order to generate a serial time-domain signal. The add cyclic prefix block 425 inserts a cyclic prefix to the time-domain signal. The up-converter 430 modulates (such as up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before conversion to the RF frequency.

[0073] The RF signal from the BS 102 arrives at the UE 116 after passing through the wireless channel, and the reverse operation to that performed at the BS 102 is performed at the UE 116.

[0074] As Figure 5 shown, the down-converter 555 down-converts the received signal to baseband frequency and the remove cyclic prefix block 560 removes the cyclic prefix to generate a serial time-domain baseband signal. The serial-to-parallel block 565 converts the time-domain baseband signal to parallel time-domain signals. The size N FFT block 570 performs the FFT algorithm to generate N parallel frequency-domain signals. The parallel-to-serial block 575 converts the parallel frequency-domain signals to a sequence of modulated data symbols. The channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0075] Each of the BSs 101-103 can implement a transmit path 400 as Figure 4 shown, which is similar to transmitting in the downlink to UEs 111-116, and can implement a receive path 500 as Figure 5 shown, which is similar to receiving in the uplink from UEs 111-116. Similarly, each of the UEs 111-116 can implement the transmit path 400 for transmitting in the uplink to the BSs 101-103 and can implement the receive path 500 for receiving in the downlink from the BSs 101-103. Further, each of the UEs 111-116 can implement the receive path 250 for receiving in the sidelink from another one of the UEs 111-116.

[0076] Figure 4 andFigure 5 Each component can be implemented using hardware or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5 At least some components can be implemented in software, while others can be implemented in configurable hardware or a hybrid of software and configurable hardware. For example, FFT block 570 and IFFT block 515 can be implemented as configurable software algorithms, where the value of size N can be modified according to the implementation.

[0077] Furthermore, although described as using FFT and IFFT, this is merely exemplary and should not be construed as limiting the scope of this disclosure. Other types of transforms, such as the Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions, can be used. It will be understood that for the DFT and IDFT functions, the value of the variable N can be any integer (such as 1, 2, 3, 4, etc.), while for the FFT and IFFT functions, the value of the variable N can be any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0078] although Figure 4 and Figure 5 An example of a wireless transmit and receive path is shown, but it is possible to modify it further. Figure 4 and Figure 5 Make various changes. For example, Figure 4 and Figure 5 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. Furthermore, Figure 6 and Figure 7 This example aims to illustrate the types of send and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0079] The unit on a cell used for downlink (DL) or uplink (UL) signaling is called a time slot, and may include one or more symbols. A bandwidth (BW) unit is called a resource block (RB). An RB includes multiple subcarriers (SCs). For example, a time slot may have a duration of 1 millisecond, an RB may have a bandwidth of 180 kHz, and include 12 SCs spaced 15 kHz apart. The subcarrier spacing (SCS) can be determined by the SCS configuration μ, which is 2. μ • 15kHz. A cell of a subcarrier on a symbol is called a resource element (RE). A cell of an RB on a symbol is called a physical RB (PRB).

[0080] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), reference signals (RS) or pilot signals, etc. A BS, such as BS 102, transmits data information or DCI over respective physical DL shared channels (PDSCHs) or physical DL control channels (PDCCHs). A PDSCH or a PDCCH can be transmitted over a variable number of slot symbols including one slot symbol. A BS transmits one or more of multiple types of RS including channel state information RS (CSI-RS) and demodulation RS (DM-RS). A CSI-RS is intended for a UE, such as UE 116, to perform measurements and provide channel state information (CSI) to the BS. For channel measurement or time tracking, a non-zero-power CSI-RS (NZP CSI-RS) resource can be used. For interference measurement reporting (IMR), a CSI interference measurement (CSI-IM) resource can be used. A CSI-IM resource can also be associated with a zero-power CSI-RS (ZP CSI-RS) configuration. A UE can determine CSI-RS reception parameters through DL control signaling or higher layer signaling, such as radio resource control (RRC) signaling from a gNB. A DM-RS is typically conveyed within a BW of a respective PDCCH or PDSCH, and a UE can use the DM-RS to demodulate data or control information.

[0081] UL signals also include data signals conveying information content, control signals conveying UL control information (UCI), DM-RS associated with data or UCI demodulation, sounding RS (SRS) to enable a gNB to perform UL channel measurement, and random access (RA) preamble to enable a UE, such as UE 116, to perform random access. A UE transmits data information or UCI over respective physical UL shared channels (PUSCHs) or physical UL control channels (PUCCHs). A PUSCH or a PUCCH can be transmitted over a variable number of slot symbols including one slot symbol. When a UE transmits data information and UCI simultaneously, the UE can multiplex both in a PUSCH, or depending on UE capability, transmit both a PUSCH with data information and a PUCCH with UCI, at least when transmission is performed on different cells.

[0082] The UCI includes hybrid automatic repeat request (HARQ) acknowledgement (ACK) information indicating correct or incorrect detection of data transport blocks (TBs) or code block groups (CBGs) in the PDSCH, scheduling request (SR) indicating whether the UE has data to send in its buffer, and CSI reporting that enables the gNB to select appropriate parameters for PDSCH or PDCCH transmissions to the UE. The CSI reporting can include a channel quality indicator (CQI) that informs the gNB of a maximum modulation and coding scheme (MCS) for the UE to detect a data TB with a predetermined block error rate (BLER), such as a 10% BLER; a precoding matrix indicator (PMI) that informs the gNB how to combine signals from multiple transmitter antennas according to multiple-input multiple-output (MIMO) transmission principles; a CSI-RS resource indicator (CRI) for obtaining the CSI report; and a rank indicator (RI) indicating a transmission rank of the PDSCH. In certain embodiments, the UL RS includes DM-RS and SRS. The DM-RS is typically transmitted within the BW of the corresponding PUSCH or PUCCH. The gNB can use the DM-RS to demodulate information in the corresponding PUSCH or PUCCH. The SRS is transmitted by the UE to provide the gNB with UL CSI and, for a time division duplex (TDD) system, also a PMI for DL transmissions. In addition, the UE can transmit a physical random access channel (PRACH) as part of a random access procedure or for other purposes.

[0083] The DL transmissions and the UL transmissions can be based on an orthogonal frequency division multiplexing (OFDM) waveform including a variant that uses DFT precoding, which is also referred to as DFT-spread-OFDM.

[0084] Figure 2 A block diagram 600 of an example transmitter structure using orthogonal frequency division multiplexing (OFDM) is shown in accordance with an embodiment of the present disclosure. Figure 3 A block diagram 700 of an example receiver structure using OFDM is shown in accordance with an embodiment of the present disclosure.

[0085] The transmitter structure shown in the block diagram 600 and the receiver structure shown in the block diagram 600 can be similar to Figure 6 the RF transceivers 210a-210n of the UE 100 of Figure 7 the RF transceivers 310 of the gNB 102. Figure 8 the example block diagram 600 and Figure 9 the block diagram 700 are for illustration only and other embodiments can be used without departing from the scope of the present disclosure.

[0086] As shown in the block diagram 600, information bits 610, such as DCI bits or data bits, are encoded by an encoder 620, rate matched to allocated time / frequency resources by a rate matcher 630, and modulated by a modulator 640. Subsequently, SC mapping unit 660 maps the modulated coded symbols and demodulation reference signals (DMRS) or CSI-RS 650 to SCs with input from BW selector unit 665, filter 670 performs an inverse fast Fourier transform (IFFT), CP insertion unit 680 adds a cyclic prefix (CP), and filter 690 filters the resulting signal and transmits it as transmit bits 695 by a radio frequency (RF) unit.

[0087] As shown in the block diagram 700, filter 720 filters a received signal 710, CP removal unit 730 removes the CP, filter 740 applies a fast Fourier transform (FFT), SC de-mapping unit 750 de-maps SCs selected by BW selector unit 755, channel estimator and demodulator unit 760 demodulates the received symbols, rate de-matcher 770 recovers the rate matching, and decoder 780 decodes the resulting bits to provide information bits 790.

[0088] In certain embodiments, a UE monitors multiple candidate locations for respective potential PDCCH receptions to decode multiple DCI formats in a slot. The DCI formats include cyclic redundancy check (CRC) bits for the UE to confirm correct detection of the DCI formats. The type of DCI format is identified by a radio network temporary identifier (RNTI) that scrambles the CRC bits.

[0089] For DCI formats scheduling PDSCH or PUSCH to a single UE, the RNTI can be a cell RNTI (C-RNTI), or a configured scheduling RNTI (CS-RNTI), or a MCS-C-RNTI, and serves as a UE identifier. In the following examples, the C-RNTI will be referenced when needed. A UE typically receives / monitors PDCCH according to a UE-specific search space (USS) to detect DCI formats with CRC scrambled by the C-RNTI.

[0090] For DCI formats scheduling PDSCH that convey system information (SI), the RNTI can be a SI-RNTI. For DCI formats scheduling PDSCH that provide random access responses (RAR), the RNTI can be a RA-RNTI. For DCI formats scheduling PDSCH that provide paging information, the RNTI can be a P-RNTI. There are many other RNTIs associated with DCI formats that provide various control information and are monitored according to a common search space (CSS).

[0091] Figure 8 An example encoding procedure 800 of a downlink control information (DCI) format is shown, in accordance with an embodiment of the present disclosure. Figure 9 An example decoding procedure 900 of a DCI format for a UE is shown, in accordance with an embodiment of the present disclosure. Figure 8 The encoding procedure 800 and Figure 9 The decoding procedure 900 are for illustration only, and other embodiments can be used without departing from the scope of the present disclosure.

[0092] The BS separately encodes and transmits each DCI format in a corresponding PDCCH. When applicable, a RNTI masks the CRC of the DCI format codeword for the UE the DCI format is targeting, in order to enable the UE to recognize the DCI format. For example, the CRC can include 16 bits or 24 bits, and the RNTI can include 16 bits or 24 bits. Otherwise, when the RNTI is not included in the DCI format, a DCI format type indicator field can be included in the DCI format.

[0093] As shown in FIG. 8, a CRC of the (unencoded) DCI format bits 810 is determined using a CRC calculation unit 820, and the CRC is masked using an exclusive OR (XOR) operation unit 830 between the CRC bits and RNTI bits 840. The XOR operation is defined as XOR(0,0) = 0, XOR(0,1) = 1, XOR(1,0) = 1, XOR(1,1) = 0. The masked CRC bits are appended to the DCI format information bits using a CRC appending unit 850. A channel encoder 860 performs channel encoding, such as tail-biting convolutional encoding or polar encoding, followed by rate matching by a rate matcher 870 to the allocated resources. An interleaving and modulation unit 880 applies interleaving and modulation, such as QPSK, and the output control signal 890 is transmitted. Figure 10 As shown in FIG. 9, a received control signal 910 is demodulated and deinterleaved by a demodulator and deinterleaver 920. The rate matching applied at the BS transmitter is recovered by a rate matcher 930, and the resulting bits are decoded by a decoder 940. After decoding, a CRC extractor 950 extracts the CRC bits, and provides DCI format information bits 960. The DCI format information bits are de-masked 970 (when applicable) by an XOR operation with a RNTI 980, and a CRC check is performed by a unit 990. When the CRC check is successful (the checksum is zero), the decoding is correct, the DCI format is detected, and the DCI format information bits are considered valid. When the CRC check is not successful, the decoding is incorrect, the DCI format is not detected, and the DCI format information bits are considered invalid.

[0094] Figure 1 As shown in FIG. 9, a received control signal 910 is demodulated and deinterleaved by a demodulator and deinterleaver 920. The rate matching applied at the BS transmitter is recovered by a rate matcher 930, and the resulting bits are decoded by a decoder 940. After decoding, a CRC extractor 950 extracts the CRC bits, and provides DCI format information bits 960. The DCI format information bits are de-masked 970 (when applicable) by an XOR operation with a RNTI 980, and a CRC check is performed by a unit 990. When the CRC check is successful (the checksum is zero), the decoding is correct, the DCI format is detected, and the DCI format information bits are considered valid. When the CRC check is not successful, the decoding is incorrect, the DCI format is not detected, and the DCI format information bits are considered invalid.

[0095] ​In certain embodiments, PDCCH transmissions can be within a set of PRBs. A BS can configure one or more sets of PRBs, also referred to as control resource sets (CORESETs), for a UE for PDCCH reception. PDCCH reception can be in control channel elements (CCEs) included in a CORESET.

[0096] A UE can monitor PDCCH according to a first PDCCH monitoring type or according to a second PDCCH monitoring type. For the first PDCCH monitoring type corresponding to a UE capability of PDCCH monitoring per slot, a maximum number of PDCCH candidates per slot is defined and a maximum number of non-overlapping CCEs for receiving a PDCCH candidate Non-overlapping CCEs are CCEs with different indices or in different symbols of a CORESET or in different CORESETs.

[0097] In certain embodiments, a UE determines CCEs for decoding a PDCCH candidate based on a search space. For some RNTIs, such as C-RNTI, a set of PDCCH candidates of a corresponding DCI format defines a corresponding set of UE-specific search spaces (USS set). For other RNTIs, such as SI-RNTI, a set of PDCCH candidates of a corresponding DCI format defines a corresponding set of common search spaces (CSS set). A search space set is associated with a CORESET in which a UE monitors PDCCH candidates for the search space set. A UE is expected to monitor PDCCH candidates for up to 4 sizes of DCI format, including up to 3 sizes of DCI format with CRC scrambled by C-RNTI for each serving cell. A UE can count the number of sizes of DCI format per serving cell based on the number of configured PDCCH candidates in the corresponding search space set for a corresponding active DL bandwidth part (BWP).

[0098] For a search space set s associated with a CORESET p, for an active DL BWP of a serving cell corresponding to a carrier indicator field value n CI , the CCE index of an aggregation level L of a PDCCH candidate corresponding to the search space set in a slot is given by equation (1) below. As described in equation (1), for any CSS, Similarly, for a USS, Y p，-1 = n RNTI ≠ 0, A p = 39827 for p mod 3 = 1, A p= 39829, for p mod 3 = 2, A p = 39839, and D = 65537. Further, as described in Equation 1, i = 0,..., L - 1, and N CCE，p is the number of CCEs in CORESET p, which are numbered from 0 to N CCE，p - 1. Similarly, if the UE is configured with a carrier indicator field of the serving cell on which it monitors PDCCH, then n CI is the carrier indicator field value; otherwise, n CI = 0 for any CSs. The expression illustrates where is the number of PDCCH candidates that the UE is configured to monitor for search space set S of the serving cell corresponding to n CI . For USS, is the maximum value of CI over all configured n RNTI values for CCE aggregation level L of search space set S. Further, the RNTI value for n css is C-RNTI.

[0099] [Equation 1]

[0100]

[0101] In certain embodiments, a UE, such as UE 116, monitors PDCCH according to a CSS for scheduling PDSCH that provides system information, random access response, or paging on only one cell called a primary cell. The UE transmits PUCCH on only the primary cell. In certain embodiments, the UE is configured as a primary secondary cell (PSCell) for PUCCH transmission. When the UE is configured as a PSCell, the UE transmits PUCCH on a primary cell of a primary / primary cell group and on the PSCell of a secondary cell group. For brevity, embodiments of the present disclosure describe considering a primary cell, but embodiments can be directly extended to a PSCell.

[0102] In certain embodiments, a UE (e.g., UE 116) is configured to monitor PDCCH for a DCI format that provides information that determines a UE’s subsequent scheduling properties. For example, DCI format 2 0 provides the structure of a slot in terms of symbols that are DL, UL, or reserved over multiple slots. In this example, the UE is expected to use the information to determine whether to transmit a channel or signal configured by higher layers, such as a configured grant PUSCH (CG-PUSCH), a PUCCH with periodic or semi-persistent CSI (P / SP-CSI) reporting or with SR, a periodic or semi-persistent SRS (P / SP-SRS), or a PRACH. In addition, DCI format 2 0 can provide information of a set of search space sets from a set of multiple configured search space sets for the UE to use over multiple slots until the next PDCCH with DCI format 2 0 is received. For shared spectrum operation, DCI format 2 0 can also include information of a channel occupancy time (COT) duration. In general, a gNB can use DCI format 2 0 to adapt several components associated with the UE’s reception or transmission.

[0103] A UE (such as UE 116) configured with discontinuous reception (DRX) mode operation can also be configured to monitor PDCCH to detect a DCI format, referred to as DCI format 2 6, that provides information about whether the UE is expected to start a drx-onDurationTimer for the next DRX cycle. The drx-onDurationTimer is a duration at the beginning of a DRX cycle. DCI format 26 can also include a bitmap of the UE’s corresponding configured SCell groups, where bits of the bitmap indicate whether the active DL BWP is a dormant BWP or an active (non-dormant) DL BWP for the UE of each activated SCell in the corresponding configured SCell group if the current active DL BWP is a dormant DL BWP, or the current active DL BWP for the UE of each activated SCell in the corresponding configured SCell group if the current active DL BWP is not a dormant BWP. The UE can not monitor PDCCH in a dormant BWP of a SCell.

[0104] In certain embodiments, a UE (such as UE 116) is configured to monitor a DCI format 24 that indicates time-frequency resources in which the UE needs to cancel transmission (such as PUSCH or SRS transmission),

[0105] As described in 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Control", a UE is not expected to be configured a CSS set that results in a number of monitored PDCCH candidates and non-overlapped CCEs per slot of the corresponding all or each scheduling cell exceeding the maximum number per slot. For the same cell scheduling or cross-carrier scheduling where the scheduling cell and the scheduled cell(s) have DL BWP with the same SCS configuration μ, the UE is not expected the number of PDCCH candidates per slot and the number of corresponding non-overlapped CCEs on a secondary cell to be greater than the corresponding number the UE can monitor on the secondary cell per slot. For cross-carrier scheduling, the number of PDCCH candidates per slot and the number of non-overlapped CCEs for monitoring are counted separately for each scheduled cell.

[0106] For all search space sets within slot n, by S css denote the set of CSS sets with cardinality I css , by S uss denote the set of USS sets with cardinality J uss . The position s uss of a USS set in S j (0≤j<J uss ) is arranged in ascending order of search space set index. The number of counted PDCCH candidates for monitoring for a CSS set S css (i) is denoted by , and the number of counted PDCCH candidates for monitoring for a USS set S uss (j) is denoted by .

[0107] For a CSS set, the UE monitors PDCCH candidates in a slot that require a total of non-overlapped CCEs.

[0108] The UE allocates PDCCH candidates for monitoring to a USS set of a primary cell with active DL BWP with SCS configuration μ in slot n according to the pseudo code as shown in Table 1 below and as described in 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Control". By V CCE (S uss(j) represents a search space set S uss (j) represents a set of non-overlapping CCEs of S CCE (S uss (j) represents V CCE (S uss (j) represents a cardinality of S uss (k) (0≤k≤j) represents allocated PDCCH candidates for monitoring for CSS set S uss (j) represents a set of non-overlapping CCEs of S

[0109]

Table 1

[0110]

[0111] Similar to the DCI format that provides information of parameters associated with the UE’s reception or transmission to the UE, a UE such as the UE 116 can be configured to monitor the PDCCH to detect a DCI format that schedules a broadcast or groupcast PDSCH transmission. Such a DCI format can also not include PUCCH resources for each UE in the group of UEs, or can not include a downlink assignment index (DAI), among other things. Additionally, there can be no other DCI format for the UE to detect before the UE needs to provide a confirmation information report about the detection of the DCI format.

[0112] When the UE does not detect a DCI format that provides information of parameters associated with the UE’s reception or transmission, it can be beneficial for the UE to inform the serving gNB so that the UE and the gNB have the same understanding. Such information can be considered as a confirmation information of the detection or non-detection of the DCI format.

[0113] A UE can need to report HARQ-ACK information in response to correct or incorrect detection of a DCI format (first HARQ-ACK information type) and in response to correct or incorrect detection of a transport block (second HARQ-ACK information type). The HARQ-ACK information reporting can be based on one of several codebook types, such as a Type-1 HARQ-ACK codebook or a Type-2 HARQ-ACK codebook. For both HARQ-ACK information types, the PUCCH resource determination and the determination of the HARQ-ACK codebook can be different. This is because a DCI format that provides information for or schedules PDSCH reception by a group of UEs can not include a field indicating a PUCCH resource for each UE from the group of UEs or can not include a downlink assignment index (DAI) or the like. Furthermore, when a UE does not detect a DCI format, there can be no other DCI format for the UE to detect before the UE needs to provide HARQ-ACK information about the detection of the DCI format.

[0114] In certain embodiments, as described in Equation (2), a UE determines a PUCCH transmit power P PUCCH,b,f,c .

[0115] [Equation 2]

[0116]

[0117] Here, P CMAX,f,c is a maximum transmit power, P O_PUCCH，b,f,c is a nominal receive power, μ is a subcarrier spacing (SCS) configuration with μ = 0 corresponding to 15 kHz, is a number of RBs used for the PUCCH transmission, PL b，f，c is a measured path loss, Δ F_PUCCH depends on several parameters including the PUCCH transmission of PUCCH format, Δ TF，b，f，c provides an adjustment according to the spectral efficiency, and g b，f，c is a closed loop power control state based on a transmit power control (TPC) command value received by the UE in a DCI format.

[0118] A UE can also multiplex HARQ-ACK information in a PUSCH transmission. Then, the UE determines a PUSCH transmit power P to determine the number of coded modulation symbols for the HARQ-ACK information. Further, the UE can reserve multiple REs in the PUSCH transmission for multiplexing multiple HARQ-ACK information bits, such as two bits, to avoid an error event where the serving gNB expects the HARQ-ACK information to be multiplexed in the PUSCH transmission, but the UE fails to detect the DCI format associated with the HARQ-ACK information.

[0119] When the PDSCH reception is by a single UE, it can be referred to as unicast PDSCH reception. When the PDSCH reception is by a group of UEs, it can be referred to as groupcast or multicast PDSCH reception. In certain embodiments, a UE can be configured to receive unicast PDSCH and groupcast PDSCH. There is a need to define the procedure for a UE to monitor PDCCH to detect DCI formats scheduling groupcast PDSCH reception independent of or in combination with monitoring PDCCH to detect DCI formats scheduling unicast PDSCH reception or PUSCH transmission, while taking into account the limitations in UE capability for PDCCH monitoring. Further, there is a need to define reporting HARQ-ACK information for groupcast PDSCH reception independent of or in combination with reporting HARQ-ACK information for unicast PDSCH reception.

[0120] Accordingly, embodiments of the present disclosure take into account the need to define a procedure for a UE to report acknowledgment information in response to correct or incorrect detection of a DCI format.

[0121] Embodiments of the present disclosure also take into account the need to define a procedure for multiplexing HARQ-ACK information in response to correct or incorrect detection of a DCI format and HARQ-ACK information in response to correct or incorrect detection of a transport block.

[0122] Embodiments of the present disclosure also take into account the need to define a procedure for a UE to multiplex HARQ-ACK information in general in response to different types of PDSCH reception and in particular in response to unicast PDSCH reception and groupcast PDSCH reception.

[0123] In addition, embodiments of the present disclosure take into account the need to define a UE procedure to monitor PDCCH to detect DCI formats providing common control information, DCI formats scheduling groupcast PDSCH reception, and DCI formats scheduling unicast PDSCH reception or PUSCH transmission.

[0124] Accordingly, embodiments of the present disclosure are directed to defining procedures for a UE to report acknowledgement information in response to correct or incorrect detection of a DCI format. The present disclosure is also directed to defining procedures for multiplexing HARQ-ACK information in response to correct or incorrect detection of a DCI format and HARQ-ACK information in response to correct or incorrect detection of a transport block. The present disclosure is also directed to defining procedures for a UE to multiplex HARQ-ACK information in response to different types of PDSCH reception in general and in response to unicast PDSCH reception and in response to groupcast PDSCH reception in particular. Furthermore, the present disclosure is directed to defining procedures for a UE to monitor PDCCH to detect a DCI format providing common control information, a DCI format scheduling a groupcast PDSCH reception, and a DCI format scheduling a unicast PDSCH reception or a PUSCH transmission.

[0125] As used hereinafter, the term “DCI format A” is used to refer to a DCI format having a CRC scrambled by a RNTI associated with scheduling a PDSCH reception. The term “DCI format B” is used to refer to a DCI format having a CRC scrambled by a RNTI associated with scheduling a groupcast PDSCH reception. Note that DCI format B can have the same size as a DCI format used to schedule a unicast PDSCH reception and have a separate configured RNTI referred to as G-RNTI or include a flag identifying scheduling of a groupcast PDSCH reception. The groupcast PDSCH reception is referred to as G-PDSCH while the unicast PDSCH reception is referred to as U-PDSCH.

[0126] Furthermore, as used hereinafter, reference to HARQ-ACK information associated with a DCI format scheduling a unicast PDSCH reception is used for a unicast PDSCH reception but can also be used for receiving a semi-persistent scheduling (SPS) PDSCH release or for a DCI format having a CRC scrambled by a RNTI associated with scheduling a PDSCH reception that instead indicates a sleep / non-sleep active DL BWP for a UE in a group of cells without scheduling a PDSCH reception.

[0127] Furthermore, the term “higher layer” is used to refer to control information provided to a UE in a PDSCH reception such as RRC or medium access control (MAC) control element (CE).

[0128] Embodiments of the present disclosure describe HARQ-ACK information for detecting a DCI format A. Such as Figure 10 and 11 The following embodiments and examples of embodiments described in

[0129] Embodiments of the present disclosure describe procedures for a UE to report acknowledgement information in response to correct or incorrect detection of DCI format A. In certain scenarios, the UE monitors PDCCH for detection of DCI format A according to a CSS, although this is not a necessary condition.

[0130] Embodiments of the present disclosure consider the case where there is no transport block associated with a HARQ process. Therefore, the acknowledgement information for detecting DCI format A is different from the conventional HARQ-ACK information. For the common reference framework, the term “HARQ-ACK” is generally used to refer to HARQ-ACK information in response to correct or incorrect detection of a transport block of a HARQ process and in response to correct or incorrect detection of a DCI format, however it is understood that the term “HARQ” does not apply to the latter.

[0131] In certain embodiments, the UE procedure to report HARQ-ACK information in response to correct or incorrect detection of DCI format A can be the same for all applicable DCI formats, or can depend on the specific DCI format. For example, when DCI format A is applicable to all UEs with RRC connection on a cell, such as when DCI format A is DCI format 2_0 providing information for slot structure on the cell or information for switching between search space sets for PDCCH monitoring, or is DCI format 2_4 indicating cancellation of transmission in time-frequency resources indicated by DCI format 2_4, or is a DCI format activating or deactivating groupcast SPS PDSCH reception, it can be preferred to provide common PUCCH resources for all UEs, and to provide HARQ-ACK information for the UE only when the value is negative acknowledgement (NACK) (the UE failed to detect DCI format A at the corresponding PDCCH MO). Such HARQ-ACK information can allow the serving gNB to determine whether there is any UE that failed to detect DCI format A, and then the serving gNB can adjust the CCE aggregation level or the power used for PDCCH transmission with DCI format A accordingly

[0132] For a group of UEs that can apply DCI format A, such as from a certain RNTI or a certain search space set, the UE procedure to report HARQ-ACK information in response to correct or incorrect detection of DCI format A can be different from the procedure for all UEs with RRC connection on a cell. Figure 1For DCI format A (such as when DCI format A is DCI format 2_6 providing a UE in the group of UEs with information on whether to monitor PDCCH or the active DL BWP of the group of cells of the UE is non-dormant or dormant DL BWP in the next DRX cycle, or when DCI format A is DCI format activating or deactivating groupcast SPS PDSCH reception) in a UE, it is generally preferred to provide each UE in the group of UEs with UE-specific PUCCH resource, e.g., through corresponding UE-specific RRC signaling, so that the serving gNB can know whether the UE has detected the DCI format. For example, when a UE (such as 116) is indicated with a non-dormant DL BWP as the active DL BWP of a group of cells, and the current active DL BWP of the group of cells is a dormant DL BWP, HARQ-ACK information with NACK value can enable the gNB to identify the UE and avoid scheduling the UE on the group of cells, thus avoiding corresponding resource waste.

[0133] The UE behavior of providing HARQ-ACK information with only NACK value, or only ACK value, or ACK or NACK value can be specified in system operation, or configured by the serving gNB through higher layer. The UE behavior of providing or not providing HARQ-ACK information can also be configured by the serving gNB through higher layer. Regardless of the UE behavior of the HARQ-ACK information value provided by the UE, the corresponding PUCCH resource for PUCCH transmission with HARQ-ACK information is provided separately for each UE.

[0134] When PUCCH with HARQ-ACK information is transmitted using the common PUCCH resource from the UE in response to detecting DCI format A, the determination of the PUCCH resource by the UE can be based on implicit signaling, or based on explicit signaling, or a combination of implicit and explicit signaling, e.g., only when the value is NACK. When the UE does not detect DCI format A based on the configuration of the corresponding search space set, or based on MO not being detected at the corresponding PDCCH monitoring occasion (MO) that is additionally configured / indicated by higher layer signaling or defined in the specification of system operation for a specific functionality, the UE can determine that DCI format A is not detected, such as, e.g., for DCI format A activating or deactivating groupcast SPS PDSCH reception.

[0135] In the first method, for explicit signaling, the configuration of the PUCCH resource can be provided by higher layer. For example, the PUCCH resource can be part of the configuration for the content of DCI format, or part of the configuration of the search space set for PDCCH monitoring to detect DCI format, or part of the PUCCH configuration for PUCCH transmission.

[0136] In a second approach, for implicit signaling, a UE (such as UE 116) can determine a PUCCH resource from a configured set of PUCCH resources based on a CCE with a lowest index among CCEs used to receive a PDCCH candidate providing DCI format A. The configured set of PUCCH resources can be provided by UE common RRC signaling, e.g., in a system information block, or by UE specific RRC signaling, e.g., in a PDSCH reception scheduled by a DCI format with CRC scrambled by a C-RNTI. The set of PUCCH resources can be resources associated with a report including up to two bits of HARQ-ACK information. When a UE transmits a PUCCH only in a case that corresponding HARQ-ACK information of DCI format A has a NACK value, the UE is required to monitor only PDCCH candidates with a same lowest CCE index, e.g., one PDCCH candidate with a first CCE aggregation level and a second PDCCH candidate with a second CCE aggregation level different from the first CCE aggregation level. In this case, the implicit PUCCH resource determination is similar to the explicit PUCCH resource determination because the UE uses a predetermined PUCCH resource based on the lowest CCE index of one or more PDCCH candidates with a same lowest CCE index of a corresponding CCE aggregation level.

[0137] For example, for a set of PUCCH resources including R PUCCH PUCCH resources, a UE can determine a PUCCH resource with an index r PUCCH , where 0≤r PUCCH ≤R PUCCH - 1. If Δ PRI < R PUCCH mod 8, the index r PUCCH is described in Equation 3. Alternatively, if Δ PRI ≥ R pUCCH mod 8, the index r PUCCH is described in Equation 4.

[0138] [Equation 3]

[0139]

[0140] [Equation 4]

[0141]

[0142] In Equation 3 and Equation 4, N CCE，p is a number of CCEs in a CORESET p of a PDCCH reception with DCI format A, n CCE，pis the lowest CCE index of PDCCH candidate in CORESET p, and PRI is the value of PUCCH resource indicator field in DCI format A, if any; otherwise, PRI = 0.

[0143] Figure 3 An example method 1000 for a UE to provide HARQ-ACK information for detecting DCI format A is shown in accordance with embodiments of the present disclosure. For example, the steps of method 1000 can be performed by any of the UEs 111-116, such as the UE 116, and supplemental procedures can be performed by a BS, such as the BS 102. Figure 10 Figure 11 Figure 1 Method 1000 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure.

[0144] In step 1010, a UE, such as the UE 116, receives a configuration of a search space set to monitor a PDCCH for detecting DCI format A. In the PDCCH MO, the UE receives a PDCCH candidate and decodes the information according to the size and RNTI of DCI format A (step 1020).

[0145] In step 1030, the UE determines whether DCI format A at the PDCCH MO is detected. In response to the UE detecting DCI format A, in step 1040, the UE does not transmit a PUCCH with HARQ-ACK information. Alternatively, in response to the UE not detecting DCI format A, the UE transmits a PUCCH with HARQ-ACK information in step 1050.

[0146] As described in method 1000, the PUCCH resource for PUCCH transmission is provided to the UE by higher layers or implicitly determined by the UE based on other parameters from the configured set of PUCCH resources. When the UE does not detect DCI format A, the HARQ-ACK information is interpreted as having a NACK value.

[0147] ​​In certain embodiments, when the UE transmits a PUCCH with HARQ-ACK information using a UE-specific PUCCH resource in response to detecting a DCI format A (such as when the HARQ-ACK information value is ACK or NACK), the UE’s determination of the PUCCH resource can be based on implicit signaling, or based on explicit signaling, or a combination of implicit and explicit signaling. When the UE does not detect a DCI format A at a PDCCH MO for detecting a DCI format A based on a configuration of the corresponding search space set or based on a separate configuration of functionality for DCI format A (the UE is configured to provide HARQ-ACK information in response to DCI format A detection), the UE can determine that no DCI format A is detected.

[0148] In a first approach, for explicit signaling, the configuration of the PUCCH resource can be provided by higher layers. For example, the PUCCH resource can be part of the UE configuration of a set of PUCCH resources for transmitting up to two HARQ-ACK information bits. The PUCCH resource can be configured separately from the set of PUCCH resources for multiplexing HARQ-ACK information in response to DCI format A detection in a PUCCH transmission using that resource, or the resource can be a predetermined resource from the set of resources, such as the first resource. When the UE does not detect a DCI format A, the UE can not transmit a PUCCH providing a NACK value (the serving gNB can then detect a discontinuous transmission (DTX) of the PUCCH), or the UE can transmit such a PUCCH if the UE can assume that a PDCCH with DCI format A is transmitted, for example based on a periodicity and offset of the corresponding configuration, which can be provided to the UE by higher layers as part of the configuration parameters related to DCI format A detection. The UE behavior of transmitting a PUCCH with a NACK value or not transmitting a PUCCH when the UE does not detect a DCI format A can be specified in the system operation or configured to the UE by higher layers from the serving gNB.

[0149] In a second approach, for implicit signaling, the UE (such as the UE 116) can be provided a set of PUCCH resources, for example through UE-common or UE-specific RRC signaling, or as part of the DCI format A configuration. Upon receiving the set of PUCCH resources, the UE can determine the PUCCH resource for PUCCH transmission with HARQ-ACK information from the set of PUCCH resources based on the location of the information for the UE in the DCI format A. For example, if the DCI format A has a size of N DCI bits that does not include CRC bits, and includes the fields as described in equation (5), the UE can use the PUCCH resource in the set of PUCCH resources with index n fieldresources. Similar to the explicit signaling case, when the UE does not detect the DCI format A, the UE can not transmit the PUCCH or can transmit the PUCCH providing a NACK value and the same procedure can be applied.

[0150] [Equation 5]

[0151]

[0152] Here, N other ≥ 0 is the number of bits not used for any field in the DCI format A A, while M field is the number of bits for each field, and the first field having information for the UE has index n field , where 0 ≤ n field ≤ N field - 1.

[0153] Figure 3 An example method 1100 for a UE to provide HARQ-ACK information according to embodiments of the present disclosure is shown. In particular, the method 1100 describes a UE providing HARQ-ACK information for detecting a DCI format A or for failing to detect a DCI format A. For example, the steps of the method 1100 can be performed by any of the UEs 111-116, such as the UE 116, and supplemental procedures can be performed by a BS, such as the BS 102. Figure 11 Figure 10 The method 1100 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure. Figure 10

[0154] In step 1110, a UE, such as the UE 116, receives a configuration of a search space set to monitor a PDCCH for detecting a DCI format A. In the PDCCH MO, the UE receives a PDCCH candidate and decodes the information according to the size of the DCI format A and the RNTI (step 1120).

[0155] In step 1130, the UE determines whether the UE detected the DCI format A in the PDCCH MO. When the UE detects the DCI format A, in step 1140, the UE transmits a PUCCH with HARQ-ACK information having an ACK value. Alternatively, when the UE does not detect the DCI format A, in step 1150, the UE transmits a PUCCH with HARQ-ACK information having a NACK value.

[0156] ​​If the UE does not detect DCI format A, the UE may also not send a PUCCH. The PUCCH resources used for PUCCH transmission are provided to the UE by a higher layer, or are implicitly determined by the UE.

[0157] For PUCCH transmission slots, the slot used to transmit PUCCH with HARQ-ACK information can be configured to be n slots after the slot for receiving the corresponding PDCCH MO with DCI format A, or the value of n can be specified in system operation (e.g., n = 0 slots), where the value of n can also depend on the SCS configuration used for PUCCH transmission. When there are no available PUCCH resources after n slots from the slot of PDCCH MO, PUCCH transmission can be performed in the first slot after n slots, which includes the PUCCH resources used for PUCCH transmission.

[0158] although Figure 10 and 11 Methods 1000 and 1100 are shown, but it is possible to... Figure 11 and 11 Make various changes. For example, although Figure 12 Method 1000 and Figure 12 Method 1100 is shown as a series of steps, but these steps may overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, steps may be omitted or replaced by other steps. For example, the steps of method 1000 may be executed in different orders.

[0159] Embodiments of this disclosure also describe the multiplexing of HARQ-ACK information for DCI format A and HARQ-ACK information for PDSCH reception. Such as Figure 1 and 13 The examples and embodiments described herein illustrate the multiplexing of HARQ-ACK information for DCI format A and HARQ-ACK information for PDSCH reception.

[0160] The embodiments of this disclosure describe the process by which the UE multiplexes the HARQ-ACK information of the decoding result of DCI format A (referred to as the first HARQ-ACK information) with other UCI types when a first PUCCH transmission with first HARQ-ACK information overlaps in time with a second PUCCH transmission or PUSCH transmission with other UCI types. Other UCI types include scheduling requests, CSI reports, or HARQ-ACK information of the decoding result of transport blocks used in PDSCH reception (referred to as the second HARQ-ACK information). The second embodiment also applies to DCI format B.

[0161] In the first method, the UE (such as the UE 116) does not multiplex the first HARQ-ACK information with any other UCI type in the same PUCCH or PUSCH transmission. The UE behavior of transmitting only the first PUCCH or only the second PUCCH or PUSCH can be specified in system operation or can be configured by the serving gNB through higher layers. The UE behavior can also depend on whether the UE transmits the first PUCCH only when the HARQ-ACK information value is NACK or transmits the first PUCCH regardless of the HARQ-ACK information value. For example, the second HARQ-ACK information can utilize a different reception reliability than the first HARQ-ACK information, and the gNB can configure the UE to transmit only the first or the second HARQ-ACK information. When the UE does not multiplex the first HARQ-ACK information with the second HARQ-ACK information, and in order to have different reception reliability for the first and second HARQ-ACK information, the target power setting P O，PUCCH for the open loop power control component used to control the PUCCH transmission power, or the parameters or a.

[0162] The UE behavior for multiplexing the first HARQ-ACK information with other UCI types can be configured separately per UCI type. For example, the UE can be configured to multiplex the first and second HARQ-ACK information in a PUCCH and configured not to multiplex the first HARQ-ACK information and an SR or a CSI report in a PUCCH, and in case of such overlap, transmit only the first PUCCH and drop the transmission of the second PUCCH. The UE behavior can also be configured depending on the payload of the other UCI information. For example, multiplexing with the first HARQ-ACK information is enabled when the payload of the second HARQ-ACK information is greater than a threshold; otherwise, it is not enabled. The payload threshold can be configured by higher layers or can be specified in system operation, e.g., equal to 2.

[0163] In a second method, a UE (such as the UE 116) multiplexes the first HARQ-ACK information with the second HARQ-ACK information. If the UE has a PDCCH MO for detecting DCI format A and the UE multiplexes the corresponding first HARQ-ACK information in the same PUCCH as the second HARQ-ACK information, e.g., because the PUCCH resource for transmitting the first PUCCH with the first HARQ-ACK information overlaps in a slot with the PUCCH resource for transmitting the second PUCCH with the second HARQ-ACK information, the UE generates one HARQ-ACK information bit associated with the PDCCH MO for DCI format A. If the UE is configured to transmit the first PUCCH only when the first HARQ-ACK information has a NACK value and multiplexes the first HARQ-ACK information with the second HARQ-ACK information regardless of the value of the first HARQ-ACK information, the UE reports an ACK value when the UE detects the DCI format; otherwise, the UE reports a NACK value.

[0164] For a HARQ-ACK information report generated according to a type-1 HARQ-ACK codebook, the PDCCH MOs for DCI format A or a separately configured subset of these PDCCH MOs are included in the determination of the type-1 HARQ-ACK codebook. In a first method, when a PUCCH transmission in a slot includes a type-1 HARQ-ACK codebook for a reception corresponding to multiple slots including D (such as D = 1) PDCCH MOs for DCI formats, the UE generates a HARQ-ACK information bit for each PDCCH MO corresponding to a detection result of the DCI format A and appends it to the type-1 HARQ-ACK codebook (i.e., the UE appends D HARQ-ACK information bits for the DCI format A detection according to an ascending order of the corresponding PDCCH MOs in the type-1 HARQ-ACK codebook).

[0165] In a third method, each PDCCH MO is treated as a virtual PDSCH reception by adding the corresponding row index in a set of row indexes of a table associated with the active DL BWP, where the table defines a corresponding set of slot offsets, start and length indicators SLIVs, and PDSCH mapping types for PDSCH receptions, and the location of the corresponding HARQ-ACK information for the PDCCH MO is the location corresponding to the virtual PDSCH reception.

[0166] When the UE is configured to multiplex the first and second HARQ-ACK information in a Type-1 HARQ-ACK codebook, and the UE reports HARQ-ACK information only for the first HARQ-ACK information for all occasions of candidate PDSCH reception, the UE determines the Type-1 HARQ-ACK codebook only for the first HARQ-ACK information.

[0167] Figure 3 An example method 1200 is shown for a UE to include HARQ-ACK information for detecting DCI format A in a Type-1 HARQ-ACK codebook according to embodiments of the present disclosure. For example, steps of the method 1200 can be performed by any of the UEs 111-116, such as the UE 116. Figure 12 Figure 13 The UE 116. Figure 1 The method 1200 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure.

[0168] In step 1210, a UE (such as the UE 116) receives a configuration of a search space set to monitor PDCCH to detect DCI format A.

[0169] Based on (i) a set of slot timing values for PUCCH transmission, (ii) a set of row indices of a table defining parameters for PDSCH reception, (iii) a PDCCH MO for DCI format A, and (iv) other configurations such as a TDD UL-DL configuration defining when the UE can receive PDSCH or PDCCH or transmit PUCCH, the UE determines in step 1220 a Type-1 HARQ-ACK codebook to transmit in PUCCH, where the set of row indices of the table for PDSCH reception includes an entry corresponding to the PDCCH MO.

[0170] In step 1230, the UE multiplexes the Type-1 HARQ-ACK codebook in PUCCH transmission in a slot determined according to a slot timing value indicated by DCI format scheduling PDSCH reception.

[0171] ​For a HARQ-ACK information report generated according to a Type-2 HARQ-ACK codebook, when the PUCCH transmission in a slot includes a Type-2 HARQ-ACK codebook for a reception corresponding to multiple slots including D (such as D = 1) PDCCH MOs for DCI format A detection, the UE generates a HARQ-ACK information bit for each PDCCH MO corresponding to the detection result of DCI format and appends it to the Type-1 HARQ-ACK codebook (i.e., the UE appends D HARQ-ACK information bits for DCI format A detection according to ascending order of the corresponding PDCCH MOs in the Type-2 HARQ-ACK codebook). Unlike the DCI format scheduling PDSCH reception, the DCI format A is assumed to not include the counter and total downlink assignment index (DAI) fields, and for the purpose of Type-2 HARQ-ACK generation, the DCI format A is treated in a similar way as SPS PDSCH reception.

[0172] Figure 3 An example method 1300 is shown for a UE to include HARQ-ACK information for detecting DCI format A in a Type-2 HARQ-ACK codebook according to embodiments of the present disclosure. For example, the steps of the method 1300 can be performed by any of the UEs 111-116, such as the UE 116. Figure 13 Figure 12 The method 1300 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure. Figure 12

[0173] In step 1310, a UE (such as the UE 116) receives a configuration of a search space set to monitor PDCCH for detecting DCI format A.

[0174] Referring to the slot of the PUCCH transmission, and based on the slots of PDSCH reception and the slots indicated by the DCI format scheduling PDSCH reception for the PUCCH transmission with the corresponding first HARQ-ACK information, in step 1320, the UE determines the slot for the PUCCH transmission with the second HARQ-ACK information, which is the same as the slot of the PUCCH transmission with the first HARQ-ACK information for the detection result of DCI format A.

[0175] In step 1330, the UE multiplexes the first and second HARQ-ACK information based on the Type-2 HARQ-ACK codebook, where the first HARQ-ACK information is appended to the second HARQ-ACK information in the PUCCH transmission.

[0176] Although the method 1300 is shown as a series of steps, it is understood that the steps can be performed in a different order or concurrently.​​Figure 12 and 13 Methods 1200 and 1300 are shown, but it is possible to... Figure 13 and 13 Make various changes. For example, although Figure 14 Method 1200 and Figure 14 Method 1300 is shown as a series of steps, but these steps may overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, steps may be omitted or replaced by other steps. For example, the steps of method 1200 may be executed in different orders.

[0177] Embodiments of this disclosure also describe the multiplexing of HARQ-ACK information for multicast PDSCH reception and unicast PDSCH reception. Such as Figure 1 The following examples and embodiments, which describe those examples and embodiments, illustrate the multiplexing of HARQ-ACK information for multicast and unicast PDSCH reception.

[0178] Embodiments of this disclosure describe the process by which a UE provides a first HARQ-ACK message in response to a multicast PDSCH (G-PDSCH) reception and multiplexes the first HARQ-ACK message with other UCI types, such as HARQ-ACK messages for unicast PDSCH (U-PDSCH) reception.

[0179] In certain embodiments, the UE is configured to provide HARQ-ACK information in response to G-PDSCH reception only when the corresponding value is NACK or regardless of the HARQ-ACK value. When the UE is configured to provide HARQ-ACK information only when it has a NACK value, if the HARQ-ACK information is provided only in response to G-PDSCH reception, the serving gNB cannot know whether the absence of PUCCH reception is due to all UEs correctly decoding the transport blocks in the corresponding G-PDSCH reception or due to at least some UEs not detecting the DCI format B scheduling the G-PDSCH reception. To avoid this problem, embodiments of the present disclosure consider that for PDCCH MOs in which the UE is configured to detect DCI format B scheduling G-PDSCH reception, when the UE does not detect the DCI format B, the UE transmits a PUCCH and such PUCCH transmission provides a NACK value for failing to detect the DCI format B (after attempting to decode) or for failing to correctly decode the transport blocks in the G-PDSCH reception (when applicable). Thus, when the UE is configured to transmit a PUCCH when the UE does not correctly decode the transport blocks of a G-PDSCH, the UE transmits a PUCCH for each PDCCH MO, or for a configured subset of PDCCH MOs, the UE transmits a PUCCH when the UE does not detect the DCI format B scheduling the G-PDSCH reception and when the UE does not correctly decode the transport blocks in the G-PDSCH reception, the UE transmits a PUCCH for the G-PDSCH reception scheduled or for the G-PDSCH reception activated / deactivated by the DCI format. Moreover, since the PUCCH transmission indicates a NACK value for the decoding of the transport blocks, additional information can be provided and, for example, the HARQ-ACK information bit value “0” can indicate that the UE did not correctly decode the DCI format scheduling the G-PUSCH reception while the value “1” can indicate that the UE did not correctly decode the transport blocks in the G-PDSCH reception, where different indications can be provided by the UE, for example, by transmitting a sequence (no modulation symbols) based PUCCH in different corresponding PUCCH resources. When the UE transmits a PUCCH with HARQ-ACK information also for the case in which the UE does not detect the DCI format B scheduling the G-PDSCH reception, the PUCCH resource and PUCCH transmission slot are configured by higher layers with respect to the slot of the corresponding PDCCH MO.

[0180] Figure 3An example method 1400 for a UE to provide HARQ-ACK information with a NACK value is shown, in accordance with embodiments of the present disclosure. The method 1400 describes a procedure for a UE to provide HARQ-ACK information with a NACK value for a failure to detect a DCI format scheduling a PDSCH reception or a failure to detect a transport block in a PDSCH reception scheduled by a DCI format. For example, the steps of the method 1400 can be performed by any of the UEs 111-116, such as the UE 116, and the supplementary procedures can be performed by a BS, such as the BS 102. Figure 14 Figure 14 The method 1400 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure. Figure 14

[0181] In step 1410, a UE (such as the UE 116) receives a configuration of a search space set to monitor a PDCCH for a DCI format. In step 1420, the UE determines whether the DCI format is detected. When the UE does not detect the DCI format, in step 1430, the UE transmits a PUCCH in a first PUCCH resource. Alternatively, when the UE detects the DCI format without correctly decoding a transport block in a PDSCH reception scheduled by the DCI format, in step 1440, the UE transmits a PUCCH in a second PUCCH resource.

[0182] In the above example, when the UE detects the DCI format and the transport block in the PDSCH reception scheduled by the DCI format, the UE does not transmit a PUCCH. The first or second PUCCH resource for the PUCCH transmission is provided to the UE by higher layer signaling or determined implicitly by the UE, for example, based on a first index of CCEs for a PDCCH candidate providing the DCI format.

[0183] Although the method 1400 is illustrated as a series of steps, various changes can be made to the method 1400. For example, while the method 1400 is shown as a series of steps, various steps could overlap, occur in parallel, occur in a different order, or occur multiple times. Figure 14 Figure 15 Although the method 1400 is illustrated as a series of steps, various changes can be made to the method 1400. For example, while the method 1400 is shown as a series of steps, various steps could overlap, occur in parallel, occur in a different order, or occur multiple times. Figure 15

[0184] ​​​​In certain embodiments, the UE transmits the PUCCH only when the corresponding value is NACK and only indicates incorrect decoding of the transport block in the G-PDSCH reception, the serving gNB needs to separately set the received power threshold of the PUCCH for the DTX-to-NACK probability when the PUCCH is received only when the HARQ-ACK information is NACK, and the received power threshold of the PUCCH for the DTX-to-ACK probability when the PUCCH is received when the HARQ-ACK information is either ACK or NACK. The DTX-to-ACK probability can be set to 1% because it also depends on the condition that the UE fails to detect the DCI format triggering the PUCCH transmission with the HARQ-ACK information, which usually has a corresponding probability of 1%. Since the two events are uncorrelated, the combined event of the UE failing to detect the DCI format and the gNB making the associated DTX-to-ACK error has a combined probability of 0.01%. For the G-PDSCH reception, the combined event of the DTX-to-ACK error is 1% when the UE transmits the PUCCH only indicating the HARQ-ACK information with the NACK value in response to the incorrect transport block decoding because it corresponds to the probability of failing to detect the DCI format B under the assumption that the remaining UEs, if any, correctly decoded the transport block. Note that in order to minimize the retransmission, the target BLER of the transport block can be small because otherwise, assuming the independent decoding results of the transport block for the G-PDSCH reception between the UE and multiple UEs, the likelihood of retransmission is large. Furthermore, even when all UEs detect the DCI format B, the probability of DTX-to-NACK should be small, such as 0.01%, because otherwise, the serving gNB is likely to determine DTX with a larger probability, which in the case of the PUCCH transmission only with the NACK information, would actually correspond to a NACK-to-ACK error.

[0185] In order to achieve a small DTX-to-NACK probability (and a small NACK-to-DTX probability), the PUCCH received power should be much larger than the noise level so that an actual PUCCH reception is extremely unlikely to be misinterpreted as no PUCCH reception, at least when only a few UEs transmit the PUCCH in the PUCCH resource to indicate NACK. Therefore, the PUCCH transmission power with only NACK information should be possibly larger, or generally different, compared to the PUCCH transmission power with ACK or NACK information. In one approach, when the PUCCH transmission is for NACK information only, the serving gNB can provide a power offset P offset to the UE through higher layers for the UE to add to the PUCCH transmission power, or can equivalently provide PO_PUCCH separate configuration of the values. In a second approach, for the same purpose, the gNB can configure the UE with a set of PUCCH nominal power reception values P O_PUCCH and can indicate one of these values by the TPC command field in the DCI format B scheduling the G-PDSCH reception. Since the TPC command field does not make sense for multiple UE's G-PDSCH reception, the TPC command field in the DCI format B can be repurposed to indicate the value in the set of P O_PUCCH values. In a third approach, the UE can maintain separate closed loop power control states for the respective first PUCCH transmission in response to the G-PDCCH reception and the respective second PUCCH transmission in response to the U-PDCCH reception. The first closed loop power control state for the first PUCCH transmission can be the same as the second closed loop power control state for the second PUCCH transmission, except that the TPC command value provided by the DCI format B for the first closed loop power control state is additionally accumulated.

[0186] The UE can also be configured not to provide HARQ-ACK information for the G-PDSCH reception (or for detection of the DCI format scheduling the G-PDSCH reception). A further restriction is that this configuration only applies when the UE would provide HARQ-ACK information with an ACK or NACK value in response to decoding of the transport block in the G-PDSCH reception (and does not apply when the UE would only provide HARQ-ACK information when the value is NACK). Alternatively, whether the first and second UEs provide HARQ-ACK information can be indicated separately depending on whether the first UE is configured to transmit the PUCCH only when the HARQ-ACK information value is NACK and whether the second UE is configured to transmit the PUCCH regardless of the HARQ-ACK information value. The motivation is that a UE with a lower signal to interference noise ratio (SINR) value is more likely to decode the DCI format scheduling the G-PDSCH reception or the transport block in the G-PDSCH reception in error. The serving gNB can then only configure the first UEs to provide HARQ-ACK information for the G-PDSCH reception for SINR values below a threshold value selected by the gNB, since when all first UEs provide HARQ-ACK information with an ACK value, it can be practically determined that the remaining UEs would also provide the same value, while when some of the first UEs provide HARQ-ACK information with a NACK value, the HARQ-ACK information from the remaining UEs would be useless to the serving gNB when it retransmits the corresponding transport block in a subsequent G-PDSCH.

[0187] A UE can be separately configured for a first HARQ-ACK information corresponding to G-PDSCH reception and a second HARQ-ACK information corresponding to unicast PDSCH (U-PDSCH) reception. The UE can also be configured whether to multiplex the first HARQ-ACK information and the second HARQ-ACK information in the same PUCCH or whether to transmit only one of the first PUCCH and the second PUCCH when the first PUCCH with the first HARQ-ACK information would overlap with the second PUCCH with the second HARQ-ACK information in a slot. The configuration can be provided by higher layers or can be specified in system operation. The PUCCH transmission can include, for example, a Type-1 HARQ-ACK codebook for G-PDSCH reception and, for example, a Type-2 HARQ-ACK codebook for U-PDSCH reception. When the reception reliability of each HARQ-ACK codebook is the same, joint encoding can be applied for both HARQ-ACK codebooks, while separate encoding can be applied when the two HARQ-ACK codebooks have different reception reliabilities.

[0188] When separate encoding is applied between the first HARQ-ACK codebook and the second HARQ-ACK codebook, the UE (such as the UE 116) determines the PUCCH transmission power based on the HARQ-ACK codebook using the larger reception reliability. For example, when the first HARQ-ACK codebook uses the larger reception reliability, the UE determines the PUCCH transmission power using the same setting as when only the first HARQ-ACK codebook is multiplexed in the PUCCH. In addition, the UE can be provided with a first maximum code rate r1 and a second maximum code rate r2, or a code rate offset r offset to obtain Equation 6, and the number of RBs used for the PUCCH transmission is determined as the minimum number of RBs that satisfy the condition of Equation 7

[0189] [Equation 6]

[0190] r2 = r1 + r offset

[0191] [Equation 7]

[0192]

[0193] Here, for j = 1, 2, O ACK，j is the number of HARQ-ACK information bits of the first and second HARQ-ACK codebooks, O other，j is the number of other UCI bits (if any; otherwise O ACK，j associated with the corresponding Oother，j = 0), while O CRC，j is the number of respective CRC bits of the first and second UCI code words, is the number of subcarriers per RB used for multiplexing UCI (excluding subcarriers per RB used for multiplexing DMRS), is the number of symbols of a PUCCH transmission used for multiplexing UCI (excluding symbols used for multiplexing DMRS), and Q m is the modulation order of UCI multiplexing in a PUCCH transmission. The above determination of the power and the number of RBs of a PUCCH transmission generally applies to the case where a UE multiplexes UCI types with different corresponding reception reliabilities in the same PUCCH transmission, e.g., when a first UCI type is used for ultra-reliable services and a second UCI type is used for mobile broadband (MBB) services.

[0194] When separate encoding is applied between the first and second HARQ-ACK codebooks, the UE can reserve a first number of REs for multiplexing up to a certain number of bits, such as two bits, of the first codebook and a second number of REs for multiplexing up to a certain number of bits, such as one bit, of the second codebook in a PUSCH transmission.

[0195] For G-PDSCH reception, a Type-1 HARQ-ACK codebook can be constructed as Type-1 for unicast PDSCH reception by using a slot timing value, a time domain resource allocation (TDRA) table, and a SCS configuration corresponding to the G-PDSCH reception. When HARQ-ACK information for detecting a DCI format scheduling a G-PDSCH reception should also be provided, the TDRA table can additionally include an entry for a virtual G-PDSCH reception corresponding to a PDCCH MO of the DCI format scheduling the G-PDSCH reception. Furthermore, when the UE can assume that only a single G-PDCCH reception is scheduled between consecutive PDCCH MOs of the DCI format scheduling the G-PDSCH reception, the TDRA table can only include PDCCH MOs of the DCI format scheduling the G-PDSCH reception.

[0196] For Type-2 HARQ-ACK codebook, since G-PDSCH reception is by a group of UEs while U-PDSCH reception is by a single UE, the DAI field values are set independently in the first DCI format scheduling CG-PDSCH reception and the second DCI format scheduling unicast PDSCH reception, and the corresponding first and second Type-2 HARQ-ACK codebooks are built independently. When the UE multiplexes the first and second Type-2 HARQ-ACK codebooks in a PUCCH transmission in a slot, the UE can append the first HARQ-ACK codebook to the second HARQ-ACK codebook (or vice versa). The UE determines the PUCCH resource for the PUCCH transmission in the slot based on the DCI format the UE detects in the last PDCCH MO in which the UE is indicated to provide HARQ-ACK information in the slot, from the first or second DCI format.

[0197] For multiplexing of HARQ-ACK information codebooks in PUSCH, similar principles as for multiplexing in PUCCH can be applied. The UE can be configured whether to multiplex HARQ-ACK information in response to G-PDSCH reception in PUSCH transmission. When the UE is configured such multiplexing and joint encoding for the first and second HARQ-ACK codebooks, the second HARQ-ACK codebook, such as the one corresponding to G-PDSCH reception, can be appended to the first HARQ-ACK codebook, such as the one corresponding to U-PDSCH reception. For separate encoding of the two HARQ-ACK codebooks, the UE can be provided with separate values of and to determine the respective first and second number of coded modulation symbols for multiplexing in PUSCH transmission. In case the value of is indicated by the DCI format scheduling the PUSCH transmission, the indication can also be used for the value of or the UE can be configured with an offset O β to apply to the index of the table entry corresponding to the indicated and obtain the index of the table entry mapped to . If the index is smaller or larger than the smallest or largest index of the table entries, the UE determines to be one corresponding to the table entry with the smallest or largest index, respectively.

[0198] Embodiments of the present disclosure also describe PDCCH monitoring and scheduling of groupcast PDSCH reception or unicast PDSCH reception. The following examples and embodiments, such as those described in Figure 1 describe PDCCH monitoring and scheduling of groupcast PDSCH reception or unicast PDSCH reception.

[0199] Embodiments of the present disclosure describe PDCCH monitoring aspects for detection of DCI format B scheduling G-PDSCH reception. When a UE monitors PDCCH according to a CSS to detect DCI format B, the UE allocates PDCCH monitoring capability to G-PDSCH reception with higher priority than U-PDSCH reception. This UE behavior can be detrimental, for example, when U-PDSCH reception has higher priority than G-PDSCH reception. Since G-PDSCH reception is by multiple UEs, a serving gNB should be able to transmit PDCCH in a slot to schedule G-PDSCH reception while also being able to transmit another PDCCH in the slot to schedule U-PDSCH reception or PUSCH transmission. However, when a UE always prioritizes PDCCH monitoring capability for reception of PDCCH candidates that the UE monitors according to a CSS of a search space set associated with DCI format B, the UE can not have sufficient PDCCH monitoring capability to receive PDCCH candidates that the UE monitors according to a USS for scheduling U-PDSCH reception or PUSCH transmission.

[0200] In a first method, a UE monitors PDCCH candidates according to a USS to detect DCI format B. A new RNTI, G-RNTI, is introduced for scrambling CRC bits of DCI format, and is defined by Y p，-1 = n RNTI ≠ 0, where n RNTI is the number of PDCCH candidates that the UE monitors according to the USS, and the RNTI value for n

[0201] In a second method, a UE monitors PDCCH candidates according to a CSS to detect DCI format B. A new RNTI, G-RNTI, is introduced for scrambling CRC bits of DCI format B. The CSS can be initialized by Y p，-1 = 0, or to avoid collision of PDCCH candidates of DCI format B with PDCCH candidates of other DCI formats that the UE monitors PDCCH according to the CSS, by Y p，-1=G initialization, where G is provided by a higher layer, for example, along with the search space set configured for DCI format B. However, the UE being configured to monitor PDCCH candidates based on CSS to detect DCI format B's search space set does not take precedence over all search space sets selected when the UE is configured to monitor PDCCH candidates based on USS. The UE can be configured to prioritize allocating PDCCH candidates and non-overlapping CCEs to multiple search space sets associated with monitoring PDCCH candidates based on USS, or a number, such as a single search space set, can be specified in system operation, relative to the search space set associated with monitoring PDCCH candidates based on CSS to detect DCI format B. For example, the configuration can be based on the corresponding search space set index. There is no change to the principle of prioritizing the allocation of PDCCH candidates / non-overlapping CCEs to CSS sets not only associated with DCI format B.

[0202] Figure 3 An example method 1500 for a UE to allocate PDCCH candidates and non-overlapping CCEs to a search space set, according to an embodiment of this disclosure, is illustrated. For example, the steps of method 1500 can be performed by... Figure 15 To execute any of UE 111-116, for example Figure 15 UE 116, and the supplementary process can be performed by the BS, such as BS 102. Figure 15 Method 1500 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0203] In step 1510, the UE (such as UE 116) receives a configuration for monitoring the PDCCH according to the CSS or according to the USS of each search space set. In step 1520, the UE determines whether the DCI format associated with the search space set used for PDCCH monitoring according to the CSS is a first DCI format, such as DCI format B. When the DCI format is not the first DCI format, in step 1530, the UE preferentially assigns PDCCH candidate and non-overlapping CCE to any search space set in which the UE monitors the PDCCH according to the USS to detect the DCI format. Alternatively, when the DCI format is the first DCI format, in step 1540, the UE preferentially assigns PDCCH candidate and non-overlapping CCE to at least one search space set in which the UE monitors the PDCCH according to the USS to detect the DCI format, based on, for example, the corresponding search space index, relative to the search space set.

[0204] although Figure 15 Method 1500 is shown, but it is possible to... Figure 16 Make various changes. For example, although Figure 16The method 1500 is illustrated as a series of steps, but individual steps can overlap, occur in a different order, be performed concurrently, or occur multiple times. In another example, steps can be omitted or replaced by other steps. For example, steps of the method 1400 can be performed in a different order.

[0205] Figure 16 A structure of a user equipment (UE) according to an embodiment of the disclosure is illustrated.

[0206] Reference Figure 3 The UE 1600 can include a controller 1610, a transceiver 1620, and a memory 1630. However, all of the illustrated components are not essential. The UE 1600 can be implemented by more or less components than those illustrated. Figure 17 The controller 1610 and the transceiver 1620 and the memory 1630 can be implemented as a single chip according to another embodiment.

[0207] The UE 1600 can correspond to the UE described above. For example, the UE 1600 can correspond to the UE in Figure 17

[0208] The aforementioned components will now be described in detail.

[0209] The controller 1610 can include one or more processors or other processing devices that control the proposed functions, processes, and / or methods. Operations of the UE 1600 can be implemented by the controller 1610.

[0210] The transceiver 1620 can include an RF transmitter for up-converting and amplifying a transmitted signal, and an RF receiver for down-converting a frequency of a received signal. However, according to another embodiment, the transceiver 1620 can be implemented by more or less components than those illustrated in the components.

[0211] The transceiver 1620 can be connected to the controller 1610 and transmit and / or receive a signal. The signal can include control information and data. Also, the transceiver 1620 can receive a signal through a wireless channel and output the signal to the controller 1610. The transceiver 1620 can transmit a signal output from the controller 1610 through a wireless channel.

[0212] The memory 1630 can store control information or data included in a signal obtained by the UE 1600. The memory 1630 can be connected to the controller 1610 and store at least one instruction or protocol or parameter for the proposed functions, processes, and / or methods. The memory 1630 can include a read-only memory (ROM) and / or a random access memory (RAM) and / or a hard disk and / or a CD-ROM and / or a DVD and / or other storage devices. ​

[0213] Figure 17 The structure of a base station according to an embodiment of the disclosure is illustrated.

[0214] Referring to Figure 2 , the base station 1700 can include a controller 1710, a transceiver 1720, and a memory 1730. However, all of the illustrated components are not essential. The base station 1700 can be implemented by more or less components than those illustrated. ​ In addition, according to another embodiment, the controller 1710 and the transceiver 1720 and the memory 1730 can be implemented as a single chip.

[0215] The base station 1700 can correspond to the gNB described in the disclosure. For example, the base station 1700 can correspond to the gNB in ​ .

[0216] The foregoing components will now be described in detail.

[0217] The controller 1710 can include one or more processors or other processing devices that control the proposed functions, processes, and / or methods. Operations of the base station 1700 can be implemented by the controller 1710.

[0218] The transceiver 1720 can include an RF transmitter for up-converting and amplifying a transmitted signal, and an RF receiver for down-converting a frequency of a received signal. However, according to another embodiment, the transceiver 1720 can be implemented by more or less components than those illustrated in the components.

[0219] The transceiver 1720 can be connected to the controller 1710 and transmit and / or receive a signal. The signal can include control information and data. In addition, the transceiver 1720 can receive a signal through a wireless channel and output the signal to the controller 1710. The transceiver 1720 can transmit a signal output from the controller 1710 through a wireless channel.

[0220] The memory 1730 can store control information or data included in a signal obtained by the base station 1700. The memory 1730 can be connected to the controller 1710 and store at least one instruction or protocol or parameter for the proposed functions, processes, and / or methods. The memory 1730 can include read-only memory (ROM) and / or random access memory (RAM) and / or a hard disk and / or a CD-ROM and / or a DVD and / or other storage devices.

[0221] The flow diagrams illustrate the example methods that can be implemented in accordance with the principles of the present disclosure and that the operations in the flow diagrams can vary. For instance, while shown as a series of steps, various steps in each figure can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, steps can be omitted or replaced by other steps in some embodiments.

[0222] While the figures illustrate different examples of user devices, various changes can be made to the figures. For example, a user device can include any number of each component in any suitable arrangement. In general, the figures do not limit the scope of the present disclosure to any particular configuration(s). Moreover, while figures illustrate operational environments in which various user device features disclosed in this patent document can be used, these features can be used in any other suitable system.

[0223] While the present disclosure has been described with an example embodiment, various changes and modifications can be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims. None of the description in this application should be read in the limitations of any particular application unless otherwise stated. The patent subject matter is not limited to any particular application.

Claims

1. A method performed by a user equipment (UE) in a communication system, the method comprising: performing physical downlink control channel (PDCCH) monitoring based on PDCCH candidates for receiving a PDCCH, wherein: PDCCH candidates for a first common search space (CSS) associated with a first downlink control information (DCI) format are prioritized over PDCCH candidates for a second CSS associated with a second DCI format scheduling a groupcast physical downlink shared channel (PDSCH) reception or PDCCH candidates for a UE-specific search space (USS) associated with a third DCI format scheduling a unicast PDSCH reception, and an order of PDCCH monitoring for the PDCCH candidates for the second CSS and for the PDCCH candidates for the USS is based on a configuration. 2.The method of claim 1, wherein: the configuration corresponds to a search space set index, and the order of PDCCH monitoring for the second CSS and for the USS is according to an ascending order of the search space set index. 3.The method of claim 1, further comprising: receiving: first information of a first codebook type for unicast hybrid automatic repeat request-acknowledgement (HARQ-ACK) information associated with a unicast PDSCH reception, and second information of a second codebook type for groupcast HARQ-ACK information associated with a groupcast PDSCH reception; generating: the unicast HARQ-ACK information according to the first codebook type, and the groupcast HARQ-ACK information according to the second codebook type; and transmitting a physical uplink control channel (PUCCH) with the unicast HARQ-ACK information and the groupcast HARQ-ACK information, wherein the groupcast HARQ-ACK information is appended to the unicast HARQ-ACK information.

4. The method of claim 3, wherein, the first codebook type and the second codebook type are configured as a type 1 codebook and a type 2 codebook, respectively. 5.The method of claim 3, wherein the unicast HARQ-ACK information and the groupcast HARQ-ACK information correspond to a same reception reliability, and wherein joint encoding is applied to the unicast HARQ-ACK information and the groupcast HARQ-ACK information. 6.A user equipment (UE) in a communication system, the UE comprising: a transceiver; and a processor coupled with the transceiver and configured to: perform physical downlink control channel (PDCCH) monitoring based on PDCCH candidates for receiving a PDCCH, wherein: PDCCH candidates for a first common search space (CSS) associated with a first downlink control information (DCI) format are prioritized over PDCCH candidates for a second CSS associated with a second DCI format scheduling a groupcast physical downlink shared channel (PDSCH) reception or PDCCH candidates for a UE-specific search space (USS) associated with a third DCI format scheduling a unicast PDSCH reception, and an order of PDCCH monitoring for the PDCCH candidates for the second CSS and for the PDCCH candidates for the USS is based on a configuration. 7.The UE of claim 6, wherein: the configuration corresponds to a search space set index, and an order of PDCCH monitoring of the second CSS and the USS is in ascending order of the search space set index.

8. The UE of claim 6, wherein, the processor is further configured to: receive, via the transceiver: first information of a first codebook type for unicast hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with unicast PDSCH reception; and second information of a second codebook type for groupcast HARQ-ACK information associated with groupcast PDSCH reception, generate the unicast HARQ-ACK information according to the first codebook type, generate the groupcast HARQ-ACK information according to the second codebook type, and transmit, via the transceiver, a physical uplink control channel (PUCCH) with the unicast HARQ-ACK information and the groupcast HARQ-ACK information, wherein the groupcast HARQ-ACK information is appended to the unicast HARQ-ACK information.

9. The UE of claim 8, wherein, the first codebook type and the second codebook type are configured as type 1 codebook and type 2 codebook, respectively. 10.The UE of claim 8, wherein the unicast HARQ-ACK information and the groupcast HARQ-ACK information correspond to a same reception reliability, and wherein joint encoding is applied to the unicast HARQ-ACK information and the groupcast HARQ-ACK information. 11.A method performed by a base station in a communication system, the method comprising: transmitting a physical downlink control channel (PDCCH) associated with a PDCCH candidate for transmission of the PDCCH, wherein: PDCCH candidates for a first common search space (CSS) associated with a first downlink control information (DCI) format are prioritized over PDCCH candidates for a second CSS associated with a second DCI format scheduling groupcast physical downlink shared channel (PDSCH) transmission or PDCCH candidates for a UE-specific search space (USS) associated with a third DCI format scheduling unicast PDSCH transmission, and an order of allocation of the PDCCH candidates for the second CSS and the PDCCH candidates for the USS is based on a configuration. 12.The method of claim 11, wherein: the configuration is for a search space set index, and an order of allocation of the second CSS and the USS is in ascending order of the search space set index. 13.The method of claim 11, wherein: transmitting: first information of a first codebook type for unicast hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with unicast PDSCH transmission, and second information of a second codebook type for groupcast HARQ-ACK information associated with groupcast PDSCH transmission; receiving a physical uplink control channel (PUCCH) providing the unicast HARQ-ACK information and the groupcast HARQ-ACK information; obtaining the unicast HARQ-ACK information according to the first codebook type, and obtaining the groupcast HARQ-ACK information according to a second codebook type, wherein the groupcast HARQ-ACK information is appended to unicast HARQ-ACK information.

14. The method of claim 13, wherein, the first codebook type and the second codebook type are configured as type 1 codebook and type 2 codebook, respectively.

15. The method of claim 13, wherein the unicast HARQ-ACK information and the groupcast HARQ-ACK information correspond to a same reception reliability, and wherein joint encoding is applied to the unicast HARQ-ACK information and the groupcast HARQ-ACK information.

16. A base station in a communication system, the base station comprising: a transceiver; and a processor coupled with the transceiver and configured to: transmit a physical downlink control channel (PDCCH) associated with a PDCCH candidate for transmission of the PDCCH, wherein: PDCCH candidates for a first common search space (CSS) associated with a first downlink control information (DCI) format are prioritized over PDCCH candidates for a second CSS associated with a second DCI format scheduling a groupcast physical downlink shared channel (PDSCH) transmission or PDCCH candidates for a UE-specific search space (USS) associated with a third DCI format scheduling a unicast PDSCH transmission, and an order of allocation of the PDCCH candidates for the second CSS and the PDCCH candidates for the USS is based on a configuration.

17. The base station of claim 16, wherein: the configuration is for a search space set index, and an order of allocation of the second CSS and the USS is in ascending order of the search space set index.

18. The base station of claim 16, wherein: the processor is further configured to: transmit, via the transceiver: first information of a first codebook type for unicast hybrid automatic repeat request acknowledgement (HARQ)-ACK information associated with a unicast PDSCH transmission, and second information of a second codebook type for groupcast HARQ-ACK information associated with a groupcast PDSCH transmission, receive, via the transceiver, a physical uplink control channel (PUCCH) providing the unicast HARQ-ACK information and the groupcast HARQ-ACK information, obtain the unicast HARQ-ACK information according to a first codebook type, and obtain the groupcast HARQ-ACK information according to a second codebook type, wherein the groupcast HARQ-ACK information is appended to unicast HARQ-ACK information.

19. The base station of claim 18, wherein, the first codebook type and the second codebook type are configured as type 1 codebook and type 2 codebook, respectively.

20. The base station of claim 18, wherein the unicast HARQ-ACK information and the groupcast HARQ-ACK information correspond to a same reception reliability, and wherein joint encoding is applied to the unicast HARQ-ACK information and the groupcast HARQ-ACK information.

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