Acknowledgement reporting for control information reception

Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system supporting higher data rates beyond a 4th-Generation (4G) system with an Internet of Things (IoT) technology. The method includes determining a priority for receiving the PDCCH, and receiving the PDCCH based on the 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 the configuration, PDCCH reception of the second SSS is prioritized over PDCCH reception of the third SSS. The PDCCH reception of the first SSS includes a first downlink control information (DCI) format. The PDCCH reception of the second SSS includes a second DCI format that schedules multicast physical downlink shared channel (PDSCH) reception. The PDCCH reception of the third SSS includes a third DCI format that schedules unicast PDSCH reception.

Description

[0001] This application is a divisional application of the invention patent application filed on September 17, 2021, with application number 202180064659.1 and title "Confirmation Report for Control Information Receipt". Technical Field

[0002] This disclosure generally relates to wireless communication systems, and more specifically, to confirmation reports for controlling the reception of information. Background Technology

[0003] To meet the increased demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems." 5G communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., the 60GHz band) to achieve higher data rates. To reduce radio wave propagation loss and increase transmission distance, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive MIMO technologies have been discussed in 5G communication systems. Furthermore, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), and receiver interference cancellation. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coding modulation (ACM), as well as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0004] The internet, a human-centric network in which humans generate and consume information, is now evolving into the Internet of Things (IoT), in which distributed entities (such as things) exchange and process information without human intervention. The Internet of Everything (IoE), combining IoT technology with big data processing technology, has emerged through connection to cloud servers. Sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) have recently been studied, as technological elements such as sensing technology, wired / wireless communication and network infrastructure, service interface technology, and security technology have been required for IoT implementation. Such an IoT environment can provide intelligent internet technology services, creating new value for human life by collecting and analyzing data generated between connected objects. Through the convergence and integration of existing information technology (IT) and various industrial applications, IoT can be applied to a wide range of fields, including smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0005] Correspondingly, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine-type communication (MTC), and machine-to-machine (M2M) communication can be implemented using beamforming, MIMO, and array antennas. Cloud radio access networks (RAN), as an application of the aforementioned big data processing technologies, can also be considered an example of the convergence between 5G and IoT technologies.

[0006] Fifth-generation (5G), or new radio (NR) mobile communication, is gaining increasing momentum recently amid global technological activity surrounding a wide range of candidate technologies from industry and academia. Candidate implementations of 5G / NR mobile communication include massive MIMO technologies that provide beamforming gain and support increased capacity, ranging from traditional cellular bands to higher frequencies; new waveforms that flexibly adapt to various services / applications with different needs (e.g., new radio access technologies (RATs)); new multiple access schemes that support massive connectivity; and more. Summary of the Invention

[0007] Technical issues

[0008] With the development of communication systems, there is a need for methods and apparatus for reporting confirmation of the receipt of control information.

[0009] Technical solution

[0010] This disclosure relates to the reception of control channels and data channels, and to an acknowledgment report in a control channel in response to the reception of control information or data information in the respective control channel or data channel.

[0011] In one embodiment, a method is provided for a user equipment (UE) to receive a physical downlink control channel (PDCCH). The method includes determining a prioritization for receiving PDCCHs and receiving PDCCHs based on that prioritization. PDCCH reception of a first search space set (SSS) is prioritized over PDCCH reception of a second SSS or a third SSS. Based on configuration, PDCCH reception of the second SSS may be deprioritized over PDCCH reception of the third SSS. PDCCH reception of the first SSS is based on a common search space (CSS) and includes a first downlink control information (DCI) format. PDCCH reception of the second SSS is based on the CSS and includes a second DCI format for scheduling multicast physical downlink shared channel (PDSCH) reception. PDCCH reception of the third SSS is based on a UE-specific search space (USS) and includes a third DCI format for scheduling unicast PDSCH reception.

[0012] In another embodiment, a UE is provided. The UE includes a processor and a transceiver, the processor being configured to determine the priority order of PDCCH reception, and the transceiver being operatively connected to the processor and configured to receive PDCCHs based on the priority order. PDCCH reception of a first SSS takes precedence over PDCCH reception of a second SSS or a third SSS. Based on configuration, PDCCH reception of the second SSS may or may not take precedence over PDCCH reception of the third SSS. PDCCH reception of the first SSS is based on a CSS and includes a first DCI format. PDCCH reception of the second SSS is based on a CSS and includes a second DCI format for scheduling multicast PDSCH reception. PDCCH reception of the third SSS is based on a USS and includes a third DCI format for scheduling unicast PDSCH reception.

[0013] In another embodiment, a base station is provided. The base station includes a processor and a transceiver. The processor is configured to determine the priority order of PDCCH transmissions, and the transceiver is operatively connected to the processor and configured to transmit PDCCHs based on the priority order. PDCCH transmission of a first SSS takes precedence over PDCCH transmission of a second SSS or a third SSS. Depending on the configuration, PDCCH transmission of the second SSS may take precedence over or not take precedence over PDCCH transmission of the third SSS. PDCCH transmission of the first SSS is based on a CSS and includes a first DCI format. PDCCH transmission of the second SSS is based on a CSS and includes a second DCI format for scheduling multicast PDSCH transmissions. PDCCH transmission of the third SSS is based on a USS and includes a third DCI format for scheduling unicast PDSCH transmissions.

[0014] Other technical features will be apparent to those skilled in the art from the following figures, description and claims.

[0015] Before proceeding with the detailed description below, it may be advantageous to define certain words 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, regardless of whether these elements are physically in contact with each other. The terms “transmit,” “receive,” and “communicate,” and their derivatives include both direct and indirect communication. The terms “comprise” and “include,” and their derivatives, mean unrestricted inclusion. The term “or” is inclusive, meaning and / or. The phrase “associated with” and its derivatives refer to including, being included in, interconnected with, containing, being contained within, connected to or linked with, coupled to or coupled with, communicable, cooperating, interleaving, juxtaposing, proximate, being combined with or combined with, having, having attributes, having a relationship, or being related to, etc. The term “controller” refers to any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and / or firmware. The functionality associated with any particular controller may be centralized or distributed, local or remote. When used with a list of items, the phrase "at least one" means that different combinations of one or more of the listed items may be used, and it may be necessary to use only one item from the list. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0016] Furthermore, the various functions described below can be implemented or supported by one or more computer programs, each computer program being formed by computer-readable program code and contained in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation 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 accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, optical disc (CD), digital video disc (DVD), or any other type of storage. "Non-transitory" computer-readable media does not include wired, wireless, optical, or other communication links that transmit transient electrical or other signals. Non-transitory computer-readable media includes media that can permanently store data and media that can store data and later rewrite it, such as rewritable optical discs or erasable memory devices.

[0017] Definitions of other specific words and phrases are also provided in this patent document. Those skilled in the art will understand that, in many (if not most) cases, such definitions apply to the prior and future use of the words and phrases defined in this way.

[0018] Beneficial effects

[0019] According to embodiments of this disclosure, a method and apparatus for reporting confirmation of the receipt of control information are provided. Therefore, the efficiency of the communication system can be improved. Attached Figure Description

[0020] To gain a more complete understanding of this disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, wherein like reference numerals denote like parts:

[0021] Figure 1 An example wireless network according to an embodiment of this disclosure is shown;

[0022] Figure 2 An example base station (BS) according to an embodiment of this disclosure is shown;

[0023] Figure 3 An example UE according to an embodiment of this disclosure is shown;

[0024] Figure 4 An example wireless transmission path according to an embodiment of this disclosure is shown;

[0025] Figure 5 An example wireless reception path according to an embodiment of this disclosure is shown;

[0026] Figure 6 A block diagram of an example transmitter structure using orthogonal frequency division multiplexing (OFDM) according to an embodiment of this disclosure is shown;

[0027] Figure 7 A block diagram of an example receiver structure using OFDM according to an embodiment of the present disclosure is shown;

[0028] Figure 8 An example encoding process for the downlink control information (DCI) format according to an embodiment of this disclosure is shown;

[0029] Figure 9 An example decoding process for DCI format for a UE according to an embodiment of this disclosure is shown;

[0030] Figure 10 An example method is shown for a UE to provide hybrid automatic repeat request (HARK) acknowledgment (ACK) information for detection of DCI format A according to an embodiment of this disclosure;

[0031] Figure 11 An example method for a UE to provide HARQ-ACK information according to an embodiment of this disclosure is shown;

[0032] Figure 12 An example method is shown in which a UE, according to an embodiment of the present disclosure, includes HARQ-ACK information for detecting DCI format A in a type-1 HARQ-ACK codebook;

[0033] Figure 13 An example method is shown in which a UE, according to an embodiment of the present disclosure, includes HARQ-ACK information for detecting DCI format A in a type-2 HARQ-ACK codebook;

[0034] Figure 14 An example method is shown for a UE to provide HARQ-ACK information with a negative acknowledgment (NACK) value according to an embodiment of this disclosure;

[0035] Figure 15 An example method for allocating PDCCH candidates and non-overlapping CCEs to a search space set according to an embodiment of this disclosure is shown;

[0036] Figure 16 The structure of a user equipment (UE) according to an embodiment of this disclosure is shown; and

[0037] Figure 17 The structure of a base station according to an embodiment of this disclosure is shown. Detailed Implementation

[0038] The following discussion Figures 1 to 17 The various embodiments used to describe the principles disclosed in this patent document are merely exemplary and should not be construed as limiting the scope of this disclosure in any way. Those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged system or device.

[0039] The following references are incorporated herein by reference as if fully set forth herein: 3GPP TS 38.211 v16.2.0, "NR; Physical channels and modulation"; 3GPP TS 38.211 v16.2.0, "NR; Multiplexing and Channel coding"; 3GPP TS 38.212 v16.2.0, "NR; Physical Layer Procedures for Control"; 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Data"; 3GPP TS 38.214 v16.2.0, "NR; Physical Layer Procedures for Data". 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".

[0040] To meet the increased demand for wireless data services since the deployment of fourth-generation (4G) communication systems, efforts have been made to develop and deploy improved fifth-generation (5G) or pre-5G / NR communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G networks" or "post-LTE systems."

[0041] 5G communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (e.g., 6 GHz) to achieve robust coverage and mobility support. To reduce radio wave propagation loss and increase transmission distance, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive MIMO technologies are discussed in 5G communication systems.

[0042] In addition, in 5G communication systems, development is underway to improve system networks based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), and receiver interference cancellation.

[0043] The discussion of 5G systems and their associated frequency bands is for reference only, as some embodiments of this disclosure can be implemented in 5G systems. However, this disclosure is not limited to 5G systems or their associated frequency bands, and embodiments of this disclosure can be used in conjunction with any frequency band. For example, aspects of this disclosure can also be applied to 5G communication systems, 6G, or even higher deployments that can use terahertz (THz) bands.

[0044] Depending on the network type, the term "base station" (BS) can refer to any component (or set of components) configured to provide wireless access to a network, such as a transmitting point (TP), a transmitting and receiving point (TRP), an enhanced base station (eNodeB or eNB), a gNB, a macro cell, a femtocell, a WiFi access point (AP), a satellite, or other wireless enabling device. A base station can provide wireless access according to one or more wireless communication protocols, such as 5G 3GPP New Radio Interface / Access (NR), LTE, LTE-A Advanced (LTE-A), High-Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. The terms "BS," "gNB," and "TRP" are used interchangeably in this disclosure to refer to network infrastructure components that provide wireless access to remote terminals. Furthermore, depending on the network type, the term "user equipment" (UE) can refer to any component, such as a mobile station, a subscriber station, a remote terminal, a wireless terminal, a receiving point, a vehicle, or user equipment. For example, a UE can be a mobile phone, smartphone, monitoring equipment, alarm equipment, fleet management equipment, asset tracking equipment, automobile, desktop computer, entertainment device, infotainment device, vending machine, electricity meter, water meter, gas meter, security equipment, sensor device, electrical appliance, etc. A UE can also refer to a remote wireless device that wirelessly accesses a gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine). A UE can also be an automobile, truck, van, drone, or any similar machine or equipment within such machines.

[0045] The following Figure 1-3 Various embodiments of communication technologies, such as orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA), are described in wireless communication systems. Figure 1-3 The description does not imply any physical or architectural limitation on the ways in which different embodiments may be implemented. Different embodiments of this disclosure can be implemented in any suitably arranged communication system.

[0046] Figure 1 An example wireless network 100 according to an embodiment of this disclosure is shown. Figure 1 The illustrated embodiment of the wireless network 100 is for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0047] like Figure 1 As shown, the wireless network 100 includes base station BS 101 (e.g., gNB), BS 102, and BS 103. BS 101 communicates with BS 102 and BS 103. BS 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0048] BS 102 provides wireless broadband access to network 130 to a first plurality of user equipments (UEs) within its coverage area 120. The first plurality of UEs includes UE 111, which may be located in a small business; UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M), such as a cellular phone, wireless laptop computer, wireless PDA, etc. BS 103 provides wireless broadband access to network 130 to a second plurality of UEs within its coverage area 125. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of BS 101-103 may use 5G / NR, Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), WiMAX, WiFi or other wireless communication technologies to communicate with each other and with UE 111-116.

[0049] The dashed lines indicate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for illustrative and explanatory purposes only. It should be clearly understood that, depending on the configuration of the BS and variations in the radio environment associated with natural and man-made obstacles, the coverage areas associated with the BS, such as coverage areas 120 and 125, may have other shapes, including irregular shapes.

[0050] As described in more detail below, one or more of UEs 111-116 include circuitry, procedures, or a combination thereof for receiving acknowledgment reports of control information reception. In some embodiments, BSs 101-103 include circuitry, procedures, or a combination thereof for receiving acknowledgment reports of control information reception.

[0051] although Figure 1 An example of a wireless network is shown, but more can be found on... Figure 1 Various modifications can be made. For example, the wireless network can include any number of BSs and any number of UEs in any suitable arrangement. Furthermore, BS 101 can communicate directly with any number of UEs and provide these UEs with wireless broadband access to network 130. Similarly, each BS 102-103 can communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. Additionally, BS 101, 102, and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0052] Figure 2An example BS 102 according to an embodiment of this disclosure is shown. Figure 2 The embodiment of BS 102 shown is for illustrative purposes only. Figure 1 BS 101 and 103 can have the same or similar configurations. However, BSs have a wide variety of configurations, and Figure 2 This disclosure is not intended to limit the scope to any particular implementation of BS.

[0053] like Figure 2 As shown, 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 a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0054] RF transceivers 210a-210n receive input RF signals, such as signals transmitted by a UE in wireless network 100, from antennas 205a-205n. RF transceivers 210a-210n down-convert the input RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 220, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 220 sends the processed baseband signal to controller / processor 225 for further processing.

[0055] The TX processing circuit 215 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuit 215 encodes, multiplexes, and / or digitizes the output baseband data to generate a processed baseband or IF signal. RF transceivers 210a-210n receive the processed baseband or IF signal from the TX processing circuit 215 and up-convert the baseband or IF signal into an RF signal, which is then transmitted via antennas 205a-205n.

[0056] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the BS 102. For example, the controller / processor 225 may control the reception of forward channel signals and the transmission of reverse channel signals via RF transceivers 210a-210n, RX processing circuitry 220, and TX processing circuitry 215, according to well-known principles. The controller / processor 225 may also support additional functions, such as more advanced wireless communication functions. For example, the controller / processor 225 may support acknowledgment reports for control information reception. The controller / processor 225 may support any of a variety of other functions in the BS 102. In some embodiments, the controller / processor 225 includes at least one microprocessor or microcontroller.

[0057] The controller / processor 225 is also capable of executing programs and other processes, such as an operating system, residing in the memory 230. The controller / processor 225 can move data into or out of the memory 230 as needed by the executing process. In some embodiments, the controller / processor 225 supports the reception of acknowledgment reports for control information received. For example, the controller / processor 225 can move data into or out of the memory 230 according to the executing process.

[0058] 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 via a backhaul connection or network. The network interface 235 can support communication via any suitable wired or wireless connection(s). For example, when the BS 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the network interface 235 can allow the BS 102 to communicate with other BSs via 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 a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The network interface 235 includes any suitable architecture that supports communication via wired or wireless connections, such as Ethernet or RF transceivers.

[0059] 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.

[0060] 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.

[0061] Figure 3 An example UE 116 according to an embodiment of this disclosure is shown. Figure 3The 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.

[0062] 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.

[0063] 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).

[0064] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or other output baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the output baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal, which is then transmitted via the antenna 305.

[0065] Processor 340 may include one or more processors or other processing devices and execute OS 361 stored in memory 360 to control the overall operation of UE 116. For example, processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals via RF transceiver 310, RX processing circuitry 325, and TX processing circuitry 315 according to well-known principles. In some embodiments, processor 340 includes at least one microprocessor or microcontroller.

[0066] Processor 340 is also capable of executing other processes and programs residing in memory 360, such as processes for beam management. Processor 340 can move data into or out of memory 360 as needed by the executing processes. In some embodiments, processor 340 is configured to execute application 362 based on OS 361 or in response to signals received from BS or operator. Processor 340 is also coupled to I / O interface 345, which provides UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I / O interface 345 is the communication path between these accessories and processor 340.

[0067] Processor 340 is also coupled to input device 350. An operator of UE 116 can use input device 350 to input data into UE 116. Input device 350 can be a keyboard, touchscreen, mouse, trackball, voice input, or other device capable of acting as a user interface to allow the user to interact with UE 116. For example, input device 350 may include voice recognition processing, thereby allowing the user to input voice commands. In another example, input device 350 may include a touch panel, (digital) pen sensor, button, or ultrasonic input device. Touch panel can recognize touch input in at least one of the following schemes: capacitive, pressure-sensitive, infrared, or ultrasonic.

[0068] The processor 340 is also coupled to the display 355. The display 355 may be a liquid crystal display, a light-emitting diode display, or other display capable of displaying text and / or at least limited graphics (such as from a website).

[0069] The memory 360 is coupled to the processor 340. A portion of the memory 360 may include random access memory (RAM), while another portion of the memory 360 may include flash memory or other read-only memory (ROM).

[0070] although Figure 3 An example of UE 116 is shown, but it is possible to modify it. Figure 3 Make various changes. For example, Figure 3 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although... Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0071] Figure 4 and Figure 5An example wireless transmission and reception path according to this disclosure is shown. In the following description, Figure 4 The sending path 400 can be described as being implemented in a BS (such as BS 102), while Figure 5 The receive path 500 can be described as being implemented in a UE (such as UE 116). However, it is understood 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 acknowledgment reports for receiving control information as described in embodiments of this disclosure.

[0072] like Figure 4 The transmission path 400 shown includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, an N-size inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P-to-S) block 420, a cyclic prefix addition block 425, and an up-converter (UC) 430. For example... Figure 5 The receiver path 500 shown includes a downconverter (DC) 555, a cyclic prefix removal block 560, a serial-to-parallel (S-to-P) block 565, a fast Fourier transform (FFT) block of size N, a parallel-to-serial (P-to-S) block 575, and a channel decoding and demodulation block 580.

[0073] like Figure 4 As shown, channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity-check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a frequency-domain modulated symbol sequence. Serial-to-parallel block 410 converts (such as demultiplexes) the serial modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in BS 102 and UE 116. IFFT block 415 of size N performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from IFFT block 415 of size N to generate a serial time-domain signal. Cyclic prefix addition block 425 inserts a cyclic prefix into the time-domain signal. Upconverter 430 modulates (such as upconverts) the output of cyclic prefix addition block 425 to an RF frequency for transmission via a radio channel. The signal can also be filtered in baseband before being converted to the RF frequency.

[0074] The RF signal transmitted from BS 102 reaches UE 116 after passing through the wireless channel, and UE 116 performs the opposite operation to that at BS 102.

[0075] like Figure 5 As shown, downconverter 555 downconverts the received signal to the baseband frequency, and cyclic prefix removal block 560 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 565 converts the time-domain baseband signal into a parallel time-domain signal. FFT block 570 of size N performs an FFT algorithm to generate N parallel frequency-domain signals. Parallel-to-serial block 575 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0076] Each of BS 101-103 can achieve the following: Figure 4 The transmission path 400 shown is similar to transmission to UEs 111-116 in the downlink, and can achieve the following: Figure 5 The received path 500 shown is similar to receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 can implement a transmitted path 400 for transmitting to BSs 101-103 in the uplink, and can implement a received path 500 for receiving from BSs 101-103 in the downlink. Furthermore, each of UEs 111-116 can implement a received path 250 for receiving from another of UEs 111-116 in the sidelink.

[0077] Figure 4 and Figure 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.

[0078] 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.).

[0079] 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 4 and Figure 5 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.

[0080] 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. Bandwidth (BW) units are called resource blocks (RBs). 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 configured by the SCS. Determined as kHz. 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).

[0081] DL signals include data signals that transmit information content, control signals that transmit DL control information (DCI), reference signals (RS), etc., also known as pilot signals. The BS (such as BS 102) transmits data information or DCI through the corresponding Physical DL Shared Channel (PDSCH) or Physical DL Control Channel (PDCCH). PDSCH or PDCCH can be transmitted on a variable number of time slot symbols, each including one time slot symbol. The BS transmits one or more RSs, including Channel State Information RS (CSI-RS) and Demodulated RS (DM-RS). CSI-RS is intended for the UE (such as UE 116) to perform measurements and provide Channel State Information (CSI) to the BS. For channel measurements or time tracking, non-zero power CSI-RS (NZP CSI-RS) resources can be used. For Interference Measurement Reporting (IMR), CSI Interference Measurement (CSI-IM) resources can be used. CSI-IM resources can also be associated with zero power CSI-RS (ZP CSI-RS) configurations. The UE can determine the CSI-RS reception parameters via DL control signaling or higher-level signaling (such as Radio Resource Control (RRC) signaling from the gNB). DM-RS is typically transmitted within the BW of the corresponding PDCCH or PDSCH, and the UE can use DM-RS to demodulate data or control information.

[0082] UL signals also include data signals that transmit information content, control signals that transmit UL control information (UCI), DM-RS associated with data or UCI demodulation, probe RS (SRS) that enables the gNB to perform UL channel measurements, and random access (RA) preambles that enable the UE (such as UE 116) to perform random access. The UE transmits data information or UCI via the corresponding Physical UL Shared Channel (PUSCH) or Physical UL Control Channel (PUCCH). The PUSCH or PUCCH can be transmitted on a variable number of time slot symbols, each including one time slot symbol. When the UE transmits both data information and UCI simultaneously, the UE can multiplex both in the PUSCH, or, depending on the UE's capabilities, at least when transmission is performed on different cells, transmit both a PUSCH with data information and a PUCCH with UCI.

[0083] The UCI includes a Hybrid Automatic Repeat Request (HARQ) acknowledgment (ACK) indicating correct or incorrect detection of a data transfer block (TB) or code block group (CBG) in the PDSCH, a scheduling request (SR) indicating whether the UE has data to transmit in its buffer, and a CSI report enabling the gNB to select appropriate parameters for transmission to the UE's PDSCH or PDCCH. The CSI report may include a Channel Quality Indicator (CQI) informing the gNB of: the Maximum Modulation and Coding Scheme (MCS) for the UE to detect a data TB with a predetermined block error rate (BLER) (such as 10% BLER); a Precoding Matrix Indicator (PMI) informing the gNB how to combine signals from multiple transmitter antennas according to the Multiple-Input Multiple-Output (MIMO) transmission principle; a CSI-RS Resource Indicator (CRI) for obtaining the CSI report; and a Rank Indicator (RI) indicating the transmission rank of the PDSCH. In some 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 DM-RS to demodulate information in the corresponding PUSCH or PUCCH. SRS is sent by the UE to provide the gNB with the UL CSI, and for Time Division Duplex (TDD) systems, it also provides PMI for DL ​​transmission. Furthermore, the UE can send the Physical Random Access Channel (PRACH) as part of the random access procedure or for other purposes.

[0084] DL transmission and UL transmission can be based on orthogonal frequency division multiplexing (OFDM) waveforms, including variants using DFT precoding, which is also known as DFT-extended-OFDM.

[0085] Figure 6 A block diagram 600 illustrating an example transmitter structure using orthogonal frequency division multiplexing (OFDM) according to an embodiment of this disclosure is shown. Figure 7A block diagram 700 illustrating an example receiver structure using OFDM according to an embodiment of this disclosure is shown.

[0086] The transmitter structure shown in block diagram 600 and the receiver structure shown in block diagram 600 can be similar to... Figure 2 RF transceivers 210a-210n and Figure 3 The RF transceiver 310. Figure 6 Example block diagram 600 and Figure 7 The block diagram 700 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0087] As shown in block diagram 600, information bits 610, such as DCI bits or data bits, are encoded by encoder 620, rate-matched to allocated time / frequency resources by rate matcher 630, and modulated by modulator 640. Subsequently, SC mapping unit 660 maps the modulated coded symbols and demodulation reference signal (DMRS) or CSI-RS 650 to SC using input from BW selector unit 665, filter 670 performs inverse fast Fourier transform (IFFT), CP insertion unit 680 adds cyclic prefix (CP), and filter 690 filters the resulting signal, which is then transmitted as transmit bit 695 by radio frequency (RF) unit.

[0088] As shown in block diagram 700, filter 720 filters the received signal 710, CP removal unit 730 removes CP, filter 740 applies Fast Fourier Transform (FFT), SC demapping unit 750 demaps the SC selected by BW selector unit 755, channel estimator and demodulator unit 760 demodulates the received symbols, rate dematcher 770 restores rate matching, and decoder 780 decodes the result bits to provide information bits 790.

[0089] In some embodiments, the UE monitors multiple candidate locations for a corresponding potential PDCCH reception to decode multiple DCI formats in a time slot. The DCI format includes Cyclic Redundancy Check (CRC) bits to allow the UE to verify the correct detection of the DCI format. The type of DCI format is identified by a Radio Network Temporary Identifier (RNTI) with scrambled CRC bits.

[0090] For the DCI format that schedules PDSCH or PUSCH to a single UE, the RNTI can be the cell RNTI (C-RNTI), the configured scheduling RNTI (CS-RNTI), or the MCS-C-RNTI, and is used as the UE identifier. In the example below, the C-RNTI will be referenced when needed. The UE typically receives / monitors the PDCCH according to its UE-specific search space (USS) to detect the DCI format with a CRC scrambled by the C-RNTI.

[0091] For the DCI format of a PDSCH that schedules the delivery of System Information (SI), the RNTI can be SI-RNTI. For the DCI format of a PDSCH that schedules the provision of Random Access Response (RAR), the RNTI can be RA-RNTI. For the DCI format of a PDSCH that schedules the provision of paging information, the RNTI can be P-RNTI. There are many other RNTIs associated with DCI formats that provide various control information and are monitored according to the Common Search Space (CSS).

[0092] Figure 8 An example encoding process 800 for the downlink control information (DCI) format according to an embodiment of this disclosure is shown. Figure 9 An example decoding process 900 for a DCI format for a UE according to an embodiment of this disclosure is shown. Figure 8 The encoding process 800 and Figure 9 The decoding process 900 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0093] The BS encodes and transmits each DCI format separately in the corresponding PDCCH. Where applicable, the RNTI is used to mask the CRC of the DCI format codeword for the UE to which the DCI format is targeted, so that the UE can recognize the DCI format. For example, the CRC may include 16 bits or 24 bits, and the RNTI may also include 16 bits or 24 bits. Otherwise, when the RNTI is not included in the DCI format, the DCI format type indicator field may be included in the DCI format.

[0094] like Figure 8As shown, the CRC calculation unit 820 is used to determine the CRC of the (uncoded) DCI format bits 810, and the CRC is masked using an XOR operation unit 830 between the CRC bits and the 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. The encoder 860 performs channel coding (such as tail-biting convolutional coding or polar coding), which is then rate-matched to the allocated resources by a rate matcher 870. The interleaving and modulation unit 880 applies interleaving and modulation, such as QPSK, and an output control signal 890 is transmitted.

[0095] like Figure 9 As shown, the received control signal 910 is demodulated and deinterleaved by the demodulator and deinterleaver 920. The rate match applied at the BS transmitter is recovered by the rate matcher 930, and the resulting bits are decoded by the decoder 940. After decoding, the CRC extractor 950 extracts the CRC bits and provides DCI format information bits 960. The DCI format information bits are demasked 970 (where applicable) by an XOR operation with RNTI 980, and a CRC check is performed by unit 990. When the CRC check is successful (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 unsuccessful, the decoding is incorrect, the DCI format is not detected, and the DCI format information bits are considered invalid.

[0096] In some embodiments, PDCCH transmission can be within a set of PRBs. The BS can configure one or more sets of PRBs, also known as control resource sets (CORESETs), for the UE to use for PDCCH reception. PDCCH reception can be within the control channel elements (CCEs) included in the CORESET.

[0097] The UE can monitor the PDCCH based on either a first PDCCH monitoring type or a second PDCCH monitoring type. For the first PDCCH monitoring type corresponding to the UE's capability to monitor the PDCCH by time slot, the maximum number of PDCCH candidates is defined by time slot. and the maximum number of non-overlapping CCEs used to receive PDCCH candidates Non-overlapping CCEs are CCEs that have different indices, are in different symbols of a CORESET, or are in different CORESETs.

[0098] In some embodiments, the UE determines the CCE for decoding PDCCH candidates based on a search space. For some RNTIs, such as C-RNTI, the set of PDCCH candidates for the corresponding DCI format defines a corresponding UE-specific search space (USS) set. For other RNTIs, such as SI-RNTI, the set of PDCCH candidates for the corresponding DCI format defines a corresponding common search space set (CSS set). The search space set is associated with a CORESET in which the UE monitors PDCCH candidates for that search space set. The UE expects to monitor PDCCH candidates for up to four sizes of DCI formats, which include up to three sizes of DCI formats with CRC scrambled by C-RNTI for each serving cell. The UE can count the number of DCI format sizes for each serving cell based on the number of configured PDCCH candidates in the corresponding search space set for the corresponding active DL bandwidth portion (BWP).

[0099] For the search space set s associated with CORESET p, for the value corresponding to the carrier indicator field The active DL BWP of the serving cell corresponds to the time slot. PDCCH candidates in the search space set The CCE index of the aggregation level L is given by the following equation (1). As stated in equation (1), for any CSS, Similarly, for USS, , ,for , ,for , ,for , ,and Furthermore, as stated in Equation 1, ,and This refers to the number of CCEs in CORESET p, ranging from 0 to... Number. Similarly, if the UE is configured with a carrier indicator field for the serving cell on which it monitors the PDCCH, then It is the carrier indicator field value; otherwise, including for any CSS, As described in Equation 1. It shows ,in Is the UE configured to target the corresponding Search space set of service communities The number of PDCCH candidates monitored at aggregation level L. For USS, It refers to all configurations of the CCE aggregation level L of the search space set S. On value The maximum value. Furthermore, used for The RNTI value is C-RNTI.

[0100] [Equation 1]

[0101]

[0102] In some embodiments, the UE (such as UE 116) monitors the PDCCH according to the CSS used for scheduling the PDSCH, which provides system information, random access response, or paging only on a cell referred to as the primary cell. The UE transmits the PUCCH only on the primary cell. In some 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 the PUCCH on the primary cell of the primary / primary cell group and on the PSCell of the secondary cell group. For brevity, the embodiments described in this disclosure consider the primary cell, but the embodiments can be directly extended to the PSCell.

[0103] In some embodiments, the UE (e.g., UE 116) is configured to monitor the PDCCH for a DCI format that provides information to determine the UE's subsequent scheduling attributes. For example, DCI format 2_0 provides the structure of time slots based on whether the symbols are DL, UL, or reserved on multiple time slots. In this example, the UE is expected to use the information to determine whether to transmit channels or signals configured by higher layers, such as a configured licensed PUSCH (CG-PUSCH), a PUCCH with periodic or semi-persistent CSI (P / SP-CSI) reports or with SR, a periodic or semi-persistent SRS (P / SP-SRS), or a PRACH. Furthermore, DCI format 2_0 can provide information from a set of multiple configurations of the search space set for the UE to use on multiple time slots until the next reception of a PDCCH with DCI format 2_0. For shared spectrum operations, DCI format 2_0 may also include information on the channel occupancy time (COT) duration. Typically, a gNB can use DCI format 2_0 to adapt several components associated with the UE's reception or transmission.

[0104] UEs configured to operate in Discontinuous Receive (DRX) mode (such as UE 116) can also be configured to monitor the PDCCH to detect a DCI format, referred to as DCI format 2_6, which provides information about whether the UE is expected to initiate a drx-onDurationTimer for the next DRX cycle. The drx-onDurationTimer is the duration at the start of the DRX cycle. DCI format 2_6 may also include a bitmap of the UE's corresponding configuration SCell group, wherein, if the currently active DL BWP is a dormant DL BWP, the bits of this bitmap indicate whether the active DL BWP is a dormant BWP or an active (non-dormant) DL BWP for each active UE in the corresponding configuration SCell group, or if the currently active DL BWP is not a dormant BWP, it indicates the currently active DL BWP for each active UE in the corresponding configuration SCell group. The UE may not monitor the PDCCH in a dormant BWP of a SCell.

[0105] In some embodiments, the UE (such as UE 116) is configured to monitor DCI format 2_4 indicating that the UE needs to cancel transmissions (such as PUSCH or SRS transmissions) in which it transmits.

[0106] As described in 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Control", the UE does not expect to be configured with a CSS set that results in the number of monitored PDCCH candidates and non-overlapping CCEs per time slot for all or every scheduled cell exceeding the maximum number for each time slot. For intra-cell scheduling or cross-carrier scheduling, where the scheduling cell and(s) of the scheduled cells have DL BWPμ with the same SCS configuration, the UE does not expect the number of PDCCH candidates and the corresponding number of non-overlapping CCEs per time slot on the secondary cell to be greater than the corresponding number that the UE can monitor per time slot on the secondary cell. For cross-carrier scheduling, for each scheduled cell, the number of PDCCH candidates and the number of non-overlapping CCEs for monitoring are counted separately for each time slot.

[0107] For all search space sets within time slot n, by The cardinality is A collection of CSS sets, by The cardinality is The set of USS. The location of the USS set in ( Sort by search space set index in ascending order. Used for CSS sets. The number of PDCCH candidates monitored is determined by ( ) indicates, and is used for the USS set The number of PDCCH candidates monitored is determined by ( )express.

[0108] For CSS sets, UE monitors in time slots. There are 10 PDCCH candidates, and the total number of PDCCH candidates needs to be 100. Non-overlapping CCEs.

[0109] The UE allocates PDCCH candidates for monitoring to the USS set of the primary cell with an active DL BWP having SCS configuration μ in time slot n according to the pseudocode shown in Table 1 below and as described in 3GPP TS 38.213 v16.2.0, "NR; Physical Layer Procedures for Control". Represents the search space set The set of non-overlapping CCEs, by express The cardinality, where the assigned PDCCH candidates used for monitoring the CSS set and the candidates used for monitoring all search space sets are considered. ( The assigned PDCCH candidates are monitored to determine the search space set. Non-overlapping CCEs.

[0110] Table 1

[0111]

[0112] Similar to the DCI format that provides information to the UE about parameters associated with the UE's reception or transmission, a UE (such as UE116) can be configured to monitor the PDCCH to detect the DCI format used for scheduling broadcast or multicast PDSCH transmissions. This DCI format may also exclude PUCCH resources for each UE in the UE group, or it may exclude the Downlink Allocation Index (DAI), etc. Furthermore, there may not be an alternative DCI format available for the UE to detect until the UE needs to provide a confirmation report regarding the detection of the DCI format.

[0113] When the UE does not detect a DCI format that provides information about parameters associated with the UE's reception or transmission, it may be beneficial for the UE to notify the serving gNB so that the UE and gNB have the same understanding. This information can be considered as confirmation of whether the DCI format was detected or not.

[0114] The UE may need to report HARQ-ACK information in response to a correct or incorrect detection of the DCI format (first HARQ-ACK information type), and in response to a correct or incorrect detection of a transport block (second HARQ-ACK information type). HARQ-ACK information reporting can be based on one of several codebook types, such as type-1 HARQ-ACK codebook or type-2 HARQ-ACK codebook. For the two HARQ-ACK information types, the PUCCH resource determination and the determination of the HARQ-ACK codebook can differ. This is because the DCI format used to inform or schedule the PDSCH reception of a group of UEs may not include fields indicating the PUCCH resources for each UE from that group, or it may not include the Downlink Allocation Index (DAI), etc. Furthermore, when the UE does not detect a DCI format, there may not be another DCI format for the UE to detect before the UE needs to provide HARQ-ACK information regarding the detection of the DCI format.

[0115] In some embodiments, as described in equation (2), the UE uses an index The PUCCH power control adjustment status is used to determine the cell. Medium carrier BWP activities PUCCH transmit power .

[0116] [Equation 2]

[0117]

[0118] here, That is the maximum transmission power. This is the nominal received power, μ is the value corresponding to 15 kHz. Subcarrier spacing (SCS) configuration, This refers to the number of RBs used for PUCCH transmission. It is the measured path loss. Depending on several parameters, including those in the PUCCH format, sent via PUCCH. Adjustments are provided based on spectral efficiency, and It is the closed-loop power control state based on the transmit power control (TPC) command value received by the UE in the DCI format.

[0119] The UE can also multiplex HARQ-ACK information during PUSCH transmission. Then, the UE determines the optimal transmission method based on the number of HARQ-ACK information bits, the spectral efficiency of PUSCH transmission, and the scaling factor. The number of encoded modulation symbols for the HARQ-ACK information is determined. Furthermore, the UE may reserve multiple REs in the PUSCH transmission to multiplex multiple HARQ-ACK information bits, such as two bits, to avoid situations where the serving gNB expects the HARQ-ACK information to be multiplexed in the PUSCH transmission, but the UE fails to detect an error event in the DCI format associated with the HARQ-ACK information.

[0120] When PDSCH reception is performed by a single UE, it can be referred to as unicast PDSCH reception. When PDSCH reception is performed by a group of UEs, it can be referred to as multicast or multi-cast PDSCH reception. In some embodiments, a UE can be configured to receive both unicast and multicast PDSCH. The process for a UE to monitor PDCCH to detect the DCI format of scheduled unicast PDSCH reception needs to be defined, independently or in conjunction with monitoring PDCCH to detect the DCI format of scheduled unicast PDSCH reception or PUSCH transmission, while taking into account limitations in the UE capabilities used for PDCCH monitoring. Furthermore, the HARQ-ACK information for reporting multicast PDSCH reception also needs to be defined, independently or in conjunction with reporting HARQ-ACK information for unicast PDSCH reception.

[0121] Therefore, embodiments of this disclosure take into account the need to define a process by which the UE reports confirmation information in response to a correct or incorrect detection of the DCI format.

[0122] Embodiments of this disclosure also consider the need to define a process for reusing HARQ-ACK information in response to correct or incorrect detection of DCI format and HARQ-ACK information in response to correct or incorrect detection of transport blocks.

[0123] The embodiments of this disclosure also take into account the need to define a process for the UE to multiplex HARQ-ACK information that generally responds to different types of PDSCH reception and specifically responds to unicast PDSCH reception and multicast PDSCH reception.

[0124] In addition, embodiments of this disclosure take into account the need to define UE procedures to monitor PDCCH in order to detect the DCI format that provides common control information, the DCI format that schedules multicast PDSCH reception, and the DCI format that schedules unicast PDSCH reception or PUSCH transmission.

[0125] Therefore, embodiments of this disclosure relate to defining a process for a UE to report acknowledgment information in response to correct or incorrect detection of the DCI format. This disclosure also relates to defining a process for multiplexing HARQ-ACK information in response to correct or incorrect detection of the DCI format and HARQ-ACK information in response to correct or incorrect detection of a transport block. This disclosure further relates to defining a process for a UE to multiplex HARQ-ACK information generally in response to different types of PDSCH reception and specifically in response to unicast PDSCH reception and multicast PDSCH reception. Furthermore, this disclosure relates to defining a UE process for monitoring the PDCCH to detect the DCI format providing common control information, the DCI format for scheduling multicast PDSCH reception, and the DCI format for scheduling unicast PDSCH reception or PUSCH transmission.

[0126] As used below, the term "DCI format A" refers to a DCI format with a CRC not scrambled by the RNTI associated with scheduling PDSCH reception. "DCI format B" refers to a DCI format with a CRC scrambled by the RNTI associated with scheduling multicast PDSCH reception. Note that DCI format B may have the same size as the DCI format used for scheduling unicast PDSCH reception and may have a separately configured RNTI called G-RNTI, or may include flags identifying the scheduling of multicast PDSCH reception. Multicast PDSCH reception is referred to as G-PDSCH, while unicast PDSCH reception is referred to as U-PDSCH.

[0127] Furthermore, as used below, the reference to the HARQ-ACK information associated with the DCI format of the scheduled unicast PDSCH reception is for unicast PDSCH reception, but can also be used for receiving semi-persistent scheduling (SPS) PDSCH release, or for a DCI format with a CRC scrambled by the RNTI associated with the scheduled PDSCH reception, which alternatively indicates the sleep / non-sleep activity DL BWP of a UE in a group of cells in the absence of scheduled PDSCH reception.

[0128] In addition, the term "higher layer" is used to refer to control information provided to the UE in PDSCH reception, such as RRC or Media Access Control (MAC) control element (CE).

[0129] Embodiments of this disclosure describe methods for detecting HARQ-ACK information in DCI format A. Such as Figure 10 and 11 The following embodiments and examples, which describe those embodiments and examples described herein, illustrate the use of HARQ-ACK information for detecting DCI format A.

[0130] Embodiments of this disclosure describe a process for a UE to report confirmation information in response to a correct or incorrect detection of DCI format A. In some scenarios, the UE monitors the PDCCH based on the CSS detection of DCI format A, although this is not a necessary condition.

[0131] Embodiments of this disclosure consider transport blocks not associated with a HARQ process. Therefore, the acknowledgment information used to detect DCI format A differs from 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 the correct or incorrect detection of a transport block in response to a HARQ process and in response to the correct or incorrect detection of a DCI format; however, it should be understood that the term "HARQ" does not apply to the latter.

[0132] In some embodiments, the UE process for reporting HARQ-ACK information in response to a correct or incorrect detection of DCI format A may be the same for all applicable DCI formats, or it may depend on a specific DCI format. For example, when DCI format A is applicable to all UEs with RRC connections on the cell, such as when DCI format A is DCI format 2_0 which provides information for the time slot structure on the cell or for switching between search space sets for PDCCH monitoring, or DCI format 2_4 which indicates cancellation of transmission in the time-frequency resources indicated by DCI format 2_4, or DCI format that activates or deactivates multicast SPS PDSCH reception, it is preferable to provide common PUCCH resources for all UEs, and provide HARQ-ACK information to the UE only when the value is a negative acknowledgment (NACK) (the UE failed to detect DCI format A in the corresponding PDCCH MO). This HARQ-ACK information allows the serving gNB to determine if any UEs cannot 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.

[0133] For a group of UEs that can be applied to having RRC connections (such as those from...) Figure 1The DCI format A (such as when DCI format A is DCI format 2_6, which provides information to the UEs in the group about whether to monitor PDCCH in the next DRX cycle or whether the active DL BWP of the UE's group of cells is non-dormant or dormant DL BWP, or when DCI format A is a DCI format that activates or deactivates multicast SPS PDSCH reception) is typically preferably provided with UE-specific PUCCH resources for each UE in the group, for example, 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 to be a non-dormant DL BWP as an active DL BWP of a group of cells, and the currently active DL BWP of that group of cells is a dormant DL BWP, HARQ-ACK information with a NACK value can enable the gNB to identify the UE and avoid scheduling the UE on that group of cells, thereby avoiding the corresponding waste of resources.

[0134] The UE behavior of providing HARQ-ACK information with only NACK value, only ACK value, or either ACK or NACK value can be specified in system operation or configured by the serving gNB through a higher layer. The UE behavior of providing or not providing HARQ-ACK information can also be configured by the serving gNB through a higher layer. Regardless of the UE behavior based on the HARQ-ACK information value provided, a separate PUCCH resource is provided for each UE for PUCCH transmission with HARQ-ACK information.

[0135] When the UE uses public PUCCH resources from the UE to send a PUCCH with HARQ-ACK information in response to the detection of DCI format A, for example only when the value is NACK, the UE's determination of the PUCCH resources can be based on implicit signaling, explicit signaling, or a combination of implicit and explicit signaling. When the UE does not detect DCI format A at the corresponding PDCCH monitoring moment (MO) based on the configuration of the corresponding search space set, or based on the MO further configured / indicated by higher-layer signaling or defined in the specification for system operation for a specific function, the UE can determine that DCI format A has not been detected, such as for DCI format A for activating or disabling multicast SPS PDSCH reception.

[0136] In the first approach, for explicit signaling, the configuration of PUCCH resources can be provided by a higher layer. For example, PUCCH resources can be part of the configuration for DCI format content, or part of the configuration for PDCCH monitoring to detect a search space set for DCI format, or part of the PUCCH configuration for PUCCH transmission.

[0137] In the second approach, for implicit signaling, the UE (such as UE 116) can determine the PUCCH resource from a configuration set of PUCCH resources based on the CCE with the lowest index among the CCEs used to receive PDCCH candidates providing DCI format A. The configuration set of PUCCH resources can be provided by UE common RRC signaling, such as in a system information block, or by UE-specific RRC signaling, such as in the reception of a PDSCH scheduled with a DCI format scrambled by a CRC using C-RNTI. The set of PUCCH resources can be resources associated with reports including at most two bits of HARQ-ACK information. When the UE transmits a PUCCH only if the corresponding HARQ-ACK information for DCI format A has a NACK value, the UE is required to monitor only PDCCH candidates with the same lowest CCE index, such as a 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 scenario, implicit PUCCH resource determination is similar to explicit PUCCH resource determination because the UE uses a pre-defined PUCCH resource based on the lowest CCE index of one or more PDCCH candidates, which have the same lowest CCE index corresponding to the CCE aggregation level.

[0138] For example, for including A set of PUCCH resources, with an index, allows the UE to determine which PUCCH resources are available. The PUCCH resources, among which, .if Then the index Described in Equation 3. Alternatively, if Then the index Described in Equation 4.

[0139] [Equation 3]

[0140]

[0141] [Equation 4]

[0142]

[0143] In equations 3 and 4 It is the number of CCEs in the CORESET p received by the PDCCH with DCI format A. It is the lowest CCE index among the PDCCH candidates in CORESET p, and It is the value of the PUCCH resource indicator field in DCI format A, if it exists; otherwise, .

[0144] Figure 10 An example method 1000 for a UE to detect HARQ-ACK information in DCI format A is illustrated according to an embodiment of the present disclosure. For example, the steps of method 1000 may be provided by... Figure 1 Any of the UE 111-116 executions, such as Figure 3 UE 116, and the supplementary process can be performed by BS, such as BS 102. Figure 10 Method 1000 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0145] In step 1010, the UE (such as UE 116) receives a configuration for monitoring the PDCCH to detect the search space set of DCI format A. At PDCCH MO, the UE receives PDCCH candidates and decodes the information according to the size of DCI format A and RNTI (step 1020).

[0146] In step 1030, the UE determines whether DCI format A is detected at PDCCH MO. In response to the UE detecting DCI format A, in step 1040, the UE does not send a PUCCH with HARQ-ACK information. Alternatively, in response to the UE not detecting DCI format A, the UE sends a PUCCH with HARQ-ACK information in step 1050.

[0147] As described in method 1000, the PUCCH resources used for PUCCH transmission are provided to the UE by a higher layer, or implicitly determined by the UE based on other parameters from a configuration set of PUCCH resources. When the UE does not detect DCI format A, the HARQ-ACK information is interpreted as having a NACK value.

[0148] In some embodiments, when the UE uses UE-specific PUCCH resources to transmit a PUCCH with HARQ-ACK information in response to the detection of DCI format A (e.g., when the HARQ-ACK information value is ACK or NACK), the UE's determination of the PUCCH resources can be based on implicit signaling, explicit signaling, or a combination of implicit and explicit signaling. When the UE does not detect DCI format A at the PDCCH MO used for detecting DCI format A, based on the configuration of the corresponding search space set or on a separate configuration of the 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 DCI format A has not been detected.

[0149] In the first approach, for explicit signaling, the configuration of PUCCH resources can be provided by a higher layer. For example, PUCCH resources can be part of a UE configuration of a set of PUCCH resources for transmitting up to two HARQ-ACK information bits. PUCCH resources can be configured separately from the set of PUCCH resources to multiplex HARQ-ACK information in response to DCI format A detection in PUCCH transmissions using that resource, or the resource can be a predetermined resource from the set of resources, such as a first resource. When the UE does not detect DCI format A, the UE may not transmit a PUCCH providing a NACK value (the serving gNB can then detect discontinuous transmission (DTX) of the PUCCH), or if the UE can assume that a PDCCH with DCI format A has been transmitted, the UE can transmit such a PUCCH, for example, based on a corresponding configuration of periodicity and offset, which can be provided to the UE by a higher layer as part of configuration parameters related to DCI format A detection. When the UE does not detect DCI format A, the UE behavior of sending a PUCCH with a NACK value or not sending a PUCCH can be specified in the system operation or configured to the UE by a higher layer from the serving gNB.

[0150] In the second approach, for implicit signaling, a set of PUCCH resources can be provided to the UE (such as UE 116), 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 resources for PUCCH transmission with HARQ-ACK information from the set of PUCCH resources based on the location of information for that UE in DCI format A. For example, if DCI format A has a feature that does not include CRC bits... The size of the bits, and including fields as described in equation (5), then the UE can use the set of PUCCH resources with an index. Resources. Similar to explicit signaling, when the UE does not detect DCI format A, the UE may not send a PUCCH, or it may send a PUCCH with a NACK value, and the same procedure may be applied.

[0151] [Equation 5]

[0152]

[0153] here, It is the number of bits in DCI format A that are not used in any field, while This refers to the number of bits in each field, and the first field, which contains information for the UE, has an index. ,in, .

[0154] Figure 11 An example method 1100 for a UE to provide HARQ-ACK information according to an embodiment of this disclosure is illustrated. Specifically, method 1100 describes a UE providing HARQ-ACK information for detecting DCI format A or for detecting a failure of DCI format A. For example, the steps of method 1100 may be provided by... Figure 1 To execute any of UE 111-116, such as Figure 3 UE116, and the supplementary process can be performed by a BS, such as BS 102. Figure 11 Method 1100 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0155] In step 1110, the UE (such as UE 116) receives a configuration for monitoring the PDCCH to detect the search space set of DCI format A. At PDCCH MO, the UE receives PDCCH candidates and decodes the information according to the size of DCI format A and RNTI (step 1120).

[0156] In step 1130, the UE determines whether it detects DCI format A on PDCCH MO. When the UE detects DCI format A, in step 1140, the UE sends a PUCCH with HARQ-ACK information, which has an ACK value. Alternatively, when the UE does not detect DCI format A, in step 1150, the UE sends a PUCCH with HARQ-ACK information, which has a NACK value.

[0157] 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.

[0158] 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.

[0159] although Figure 10 and 11Methods 1000 and 1100 are shown, but it is possible to... Figure 10 and 11 Make various changes. For example, although Figure 10 Method 1000 and Figure 11 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.

[0160] 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 12 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.

[0161] The embodiments of this disclosure describe a process in which the UE multiplexes the HARQ-ACK information of the decoding result of the other UCI type with that of DCI format A (referred to as the first HARQ-ACK information) 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 a transport block used in PDSCH reception (referred to as the second HARQ-ACK information). The second embodiment also applies to DCI format B.

[0162] In the first approach, the UE (such as 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 configured by the serving gNB through a higher layer. 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 second HARQ-ACK information. When the UE does not multiplex the first HARQ-ACK information with the second HARQ-ACK information, and to allow the first and second HARQ-ACK information to have different reception reliability, a target power setting for the open-loop power control component used to control the PUCCH transmission power can be separately configured by a higher layer for the UE. Or, parameters used to determine the number of coded modulation symbols and the maximum number of REs used for HARQ-ACK multiplexing in PUSCH. or .

[0163] UE behavior for multiplexing the first HARQ-ACK information with other UCI types can be configured individually according to the UCI type. For example, a UE can be configured to multiplex the first and second HARQ-ACK information in the PUCCH, and can be configured not to multiplex the first HARQ-ACK information and SR or CSI reports in the PUCCH, and in the case of such overlap, only the first PUCCH is transmitted and the transmission of the second PUCCH is discarded. UE behavior can also be configured based on the payload of 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 a higher layer or can be specified in system operation, for example, equal to 2.

[0164] In the second method, the UE (such as 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, for example because the PUCCH resources for transmitting the first PUCCH with the first HARQ-ACK information overlap with the PUCCH resources for transmitting the second PUCCH with the second HARQ-ACK information in the time slot, the UE generates a HARQ-ACK information bit associated with the PDCCH MO for DCI format A. If the UE is configured to transmit the first PUCCH only if the first HARQ-ACK information has a NACK value, and to multiplex the first HARQ-ACK information with the second HARQ-ACK information regardless of the value of the first HARQ-ACK information, when the UE detects the DCI format, the UE reports an ACK value; otherwise, the UE reports a NACK value.

[0165] For HARQ-ACK information reports generated based on the Type-1 HARQ-ACK codebook, a subset of the PDCCH MOs for DCI format A, or individual configurations of these PDCCH MOs, is included in the determination of the Type-1 HARQ-ACK codebook. In the first method, when the PUCCH transmission in a time slot includes a Type-1 HARQ-ACK codebook for reception, the reception corresponding to multiple time slots including D (e.g., D=1) PDCCH MOs for DCI format, the UE generates HARQ-ACK information bits for each PDCCH MO corresponding to the detection result of DCI format A and appends them to the Type-1 HARQ-ACK codebook (i.e., the UE appends D HARQ-ACK information bits for DCI format A detection according to the ascending order of the corresponding PDCCH MOs in the Type-1 HARQ-ACK codebook).

[0166] In the third method, each PDCCH MO is treated as a virtual PDSCH reception by adding a corresponding row index to the set of row indexes of the table associated with the active DL BWP, where the table defines the slot offset, start, and length indicators for PDSCH reception. And the corresponding set of PDSCH mapping types, and the position of the corresponding HARQ-ACK information of PDCCH MO is the position corresponding to the virtual PDSCH reception.

[0167] When the UE is configured to reuse the first and second HARQ-ACK information in the Type-1 HARQ-ACK codebook, and the UE only reports HARQ-ACK information for the first HARQ-ACK information at all times of candidate PDSCH reception, the UE determines the Type-1 HARQ-ACK codebook only for the first HARQ-ACK information.

[0168] Figure 12 An example method 1200 according to an embodiment of this disclosure is shown, for a UE to include HARQ-ACK information for detecting DCI format A in a Type-1 HARQ-ACK codebook. For example, the steps of method 1200 may be provided by... Figure 1 To execute any of UE 111-116, such as Figure 3 UE 116. Figure 12 Method 1200 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0169] In step 1210, the UE (such as UE 116) receives a configuration for monitoring the PDCCH to detect the search space set of DCI format A.

[0170] Based on (i) a set of time 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 send PUCCH, the UE determines in step 1220 the type-1 HARQ-ACK codebook to be transmitted in the PUCCH, wherein the set of row indices of the table used to determine PDSCH reception includes entries corresponding to the PDCCH MO.

[0171] In step 1230, the UE multiplexes the type-1 HARQ-ACK codebook in the PUCCH transmission in the time slot determined according to the time slot timing value indicated by the DCI format received by the scheduling PDSCH.

[0172] For the HARQ-ACK information report generated based on the Type-2 HARQ-ACK codebook, when the PUCCH transmission in the time slot includes the Type-2 HARQ-ACK codebook for reception, the reception corresponds to including the codebook for DCI format A. (such as) When there are multiple time slots of PDCCH MOs (=1), the UE generates HARQ-ACK information bits for each PDCCH MO corresponding to the detection result of DCI format, and appends them to the Type-1 HARQ-ACK codebook (i.e., the UE appends the HARQ-ACK bits for DCI format A detection according to the ascending order of the corresponding PDCCH MOs in the Type-2 HARQ-ACK codebook). (HARQ-ACK information bits). Unlike the DCI format for scheduled PDSCH reception, DCI format A is assumed to exclude the counter and total downlink allocation index (DAI) fields, and for the purpose of type-2 HARQ-ACK generation, DCI format A is processed in a similar manner to SPS PDSCH reception.

[0173] Figure 13 An example method 1300 according to an embodiment of this disclosure is shown, for a UE to include HARQ-ACK information for detecting DCI format A in a type-2 HARQ-ACK codebook. For example, the steps of method 1300 may be provided by... Figure 1 To execute any of UE 111-116, such as Figure 3 UE 116, and the supplementary process can be performed by BS, such as BS 102. Figure 13 Method 1300 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0174] In step 1310, the UE (such as UE 116) receives a configuration for monitoring the PDCCH to detect the search space set of DCI format A.

[0175] Referring to the time slot for PUCCH transmission, and based on the time slot for PDSCH reception and the time slot indicated by the DCI format received by the scheduling PDSCH for PUCCH transmission with corresponding first HARQ-ACK information, in step 1320, the UE determines the time slot for PUCCH transmission with second HARQ-ACK information, which is the same as the time slot for PUCCH transmission with first HARQ-ACK information for the detection result of DCI format A.

[0176] In step 1330, the UE multiplexes the first and second HARQ-ACK information based on the type-2 HARQ-ACK codebook, wherein the first HARQ-ACK information is appended to the second HARQ-ACK information in the PUCCH transmission.

[0177] although Figure 12 and 13 Methods 1200 and 1300 are shown, but it is possible to... Figure 12 and 13Make various changes. For example, although Figure 12 Method 1200 and Figure 13 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.

[0178] Embodiments of this disclosure also describe the multiplexing of HARQ-ACK information for multicast PDSCH reception and unicast PDSCH reception. Such as Figure 14 The following examples and embodiments, which describe those examples and embodiments, illustrate the multiplexing of HARQ-ACK information for multicast and unicast PDSCH reception.

[0179] 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.

[0180] In some embodiments, the UE is configured to provide HARQ-ACK information in response to G-PDSCH reception, either only if the corresponding value is NACK or regardless of the HARQ-ACK value. When the UE is configured to provide HARQ-ACK information only if it has a NACK value, if the HARQ-ACK information is only in response to G-PDSCH reception, the serving gNB cannot know whether the lack of PUCCH reception is due to all UEs correctly decoding the transport block in the corresponding G-PDSCH reception or because at least some UEs did not detect the DCI format B scheduled for G-PDSCH reception. To avoid this problem, embodiments of this disclosure consider that, for a PDCCH MO in which the UE is configured to detect the DCI format B scheduled for G-PDSCH reception, when the UE does not detect DCI format B, the UE sends a PUCCH, and this PUCCH transmission provides a NACK value for failure to detect DCI format B (failed to decode correctly after an attempt to decode) or failure to correctly decode the transport block in the G-PDSCH reception (when sometimes). Therefore, when the UE is configured to send PUCCH when the UE has not correctly decoded a transport block of G-PDSCH, the UE sends PUCCH for each PDCCH MO, or a subset of the configurations for PDCCH MO. When the UE does not detect DCI format B of the scheduled G-PDSCH reception and when the UE has not correctly decoded a transport block in the G-PDSCH reception, the UE sends PUCCH for the scheduled G-PDSCH reception or for G-PDSCH reception with semi-persistent scheduling activated / deactivated. Furthermore, since the PUCCH sends a decoding indication NACK value for the transport block, additional information can be provided. For example, a HARQ-ACK information bit value of "0" can indicate that the UE has not correctly decoded the DCI format of the scheduled G-PDSCH reception, while a value of "1" can indicate that the UE has not correctly decoded a transport block in the G-PDSCH reception. The UE can provide different indications, for example, by sending sequence-based (without modulation symbols) PUCCHs in different corresponding PUCCH resources. When the UE sends a PUCCH with HARQ-ACK information, which is also for cases where the UE does not detect DCI format B for scheduled G-PDSCH reception, the PUCCH resources and PUCCH transmission slots are configured by the higher layer relative to the slot of the corresponding PDCCH MO.

[0181] Figure 14An example method 1400 for a UE to provide HARQ-ACK information with a NACK value is illustrated according to an embodiment of this disclosure. Method 1400 describes the process by which a UE provides HARQ-ACK information with a NACK value when a DCI format for scheduling PDSCH reception fails to be detected or a transport block in a PDSCH reception scheduled by a DCI format fails to be detected. For example, the steps of method 1400 may be provided by… Figure 1 To execute any of UE 111-116, such as Figure 3 UE 116, and the supplementary process can be performed by BS, such as BS 102. Figure 14 Method 1400 is for illustrative purposes only, and other embodiments may be used without departing from the scope of this disclosure.

[0182] In step 1410, the UE (such as UE 116) receives a configuration for monitoring the PDCCH to detect the DCI format search space set. 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 the first PUCCH resource. Alternatively, when the UE detects the DCI format but does not correctly decode the transport block in the PDSCH reception scheduled by the DCI format, in step 1440, the UE transmits a PUCCH in the second PUCCH resource.

[0183] In the example above, when the UE detects the DCI format and transport block in a PDSCH reception scheduled by the DCI format, the UE does not send a PUCCH. The first or second PUCCH resources for PUCCH transmission are provided to the UE by higher-layer signaling, or are implicitly determined by the UE, for example, based on the first index of the CCE used to provide PDCCH candidates in the DCI format.

[0184] although Figure 14 Method 1400 is shown, but it is possible to... Figure 14 Make various changes. For example, although Figure 14 Method 1400 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 1400 may be executed in different orders.

[0185] In some embodiments, the UE only sends the PUCCH when the corresponding value is NACK, and only indicates incorrect decoding of the transport block in G-PDSCH reception. The serving gNB needs to separately set the PUCCH receive power threshold for the DTX-to-NACK probability when the PUCCH is received only when the HARQ-ACK information is NACK, and the PUCCH receive power threshold for the DTX-to-ACK probability when the PUCCH is received when the HARQ-ACK information is 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 that triggers the transmission of the PUCCH with HARQ-ACK information, which typically has a corresponding probability of 1%. Since these two events are unrelated, the combined event of the UE failing to detect the DCI format and the gNB generating an associated DTX-to-ACK error has a combined probability of 0.01%. For G-PDSCH reception, when a UE sends a PUCCH with a NACK value indicating only a response to incorrect transport block decoding, the combined event of a DTX-to-ACK error is 1%, because it corresponds to the probability of failing to detect DCI format B under the assumption that the remaining UEs (if any) correctly decoded the transport block. Note that to minimize retransmissions, the target BLER of the transport block may be small because, otherwise, assuming independent decoding results between the UE and multiple UEs for the transport block received by G-PDSCH, the probability of retransmission is high. Furthermore, even when all UEs detect 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 much higher probability, which would effectively correspond to a NACK-to-ACK error in the case of PUCCH transmission with only NACK information.

[0186] To achieve a low DTX-to-NACK probability (and a low NACK-to-DTX probability), the PUCCH receive power should be significantly greater than the noise level, making it highly unlikely that actual PUCCH reception would be misinterpreted as no PUCCH reception, at least when only a few UEs transmit PUCCHs in the PUCCH resource to indicate NACK. Therefore, the PUCCH transmit power with only NACK information should likely be larger, or typically different, than the PUCCH transmit power with either ACK or NACK information. In one approach, when PUCCH transmission is only for NACK information, the serving gNB can provide a power offset to the UE via a higher layer. This allows the UE to add to the PUCCH transmit power, or it can be equivalently provided depending on whether the UE transmits the PUCCH to indicate only a NACK value or a NACK or ACK value indicating HARQ-ACK information. Individual configuration of the value. In the second method, for the same purpose, the gNB can configure the PUCCH nominal power received value to the UE. The set of values ​​can be used to indicate one of these values ​​via DCI format B, which schedules G-PDSCH reception. Since the TPC command field is meaningless for G-PDSCH reception across multiple UEs, the TPC command field in DCI format B can be reused to indicate... The values ​​in the set of values. In the third method, the UE can maintain separate closed-loop power control states for the corresponding first PUCCH transmission in response to G-PDCCH reception and the corresponding second PUCCH transmission in response to 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 DCI format B for the first closed-loop power control state is additionally added.

[0187] The UE can also be configured not to provide HARQ-ACK information for G-PDSCH reception (or for detecting the DCI format used to schedule G-PDSCH reception). A further limitation is that this configuration applies only if the UE will provide HARQ-ACK information with an ACK or NACK value in response to the decoding of a transport block in G-PDSCH reception (and not if the UE will only provide HARQ-ACK information when the value is NACK). Alternatively, the first and second UEs can be individually instructed on whether to provide HARQ-ACK information, depending on whether the first UE is configured to send PUCCH only when the HARQ-ACK information value is NACK, and whether the second UE is configured to send PUCCH regardless of the HARQ-ACK information value. The motivation is that UEs with lower signal-to-interference-noise ratio (SINR) values ​​are more likely to incorrectly decode the DCI format used to schedule G-PDSCH reception or the transport block in G-PDSCH reception. The serving gNB can then configure only the first UE with a SINR value lower than the threshold selected by the gNB to provide HARQ-ACK information for G-PDSCH reception. This is because when all the first UEs provide HARQ-ACK information with an ACK value, it can be determined that the remaining UEs will also provide the same value. However, when some of the first UEs provide HARQ-ACK information with a NACK value, the HARQ-ACK information from the remaining UEs will be useless to the serving gNB when it retransmits the corresponding transport block in a subsequent G-PDSCH.

[0188] The HARQ-ACK codebook type can be configured separately for the UE for the first HARQ-ACK information received corresponding to G-PDSCH and the second HARQ-ACK information received corresponding to unicast PDSCH (U-PDSCH). The UE can also be configured to, when a first PUCCH transmission with first HARQ-ACK information overlaps with a second PUCCH transmission with second HARQ-ACK information in a time slot, either reuse the first and second HARQ-ACK information in the same PUCCH, or transmit only one of the first and second PUCCHs. This configuration can be provided by a higher layer or specified in system operation. 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 coding can be applied to the two HARQ-ACK codebooks; when the two HARQ-ACK codebooks have different reception reliability, separate coding can be applied.

[0189] When separate coding is applied between the first and second HARQ-ACK codebooks, the UE (such as UE116) determines the PUCCH transmit power based on the HARQ-ACK codebook with higher receive reliability. For example, when the first HARQ-ACK codebook uses higher receive reliability, the UE uses the same settings as when only the first HARQ-ACK codebook is multiplexed in the PUCCH to determine the PUCCH transmit power. Furthermore, a first maximum code rate can be provided to the UE. Second maximum bit rate Or bitrate offset This yields Equation 6, and the number of RBs used for PUCCH transmission is determined as the minimum number of RBs that satisfy the conditions of Equation 7. .

[0190] [Equation 6]

[0191]

[0192] [Equation 7]

[0193]

[0194] Here, for , It is the number of HARQ-ACK information bits in the first and second HARQ-ACK codebooks. Yes (such as for and corresponding) The number of other UCI bits associated with the same service (SR or CSI) (if any; otherwise) ),and It is the number of CRC bits corresponding to the first and second UCI codewords. This is the number of subcarriers per RB used for multiplexing UCI (excluding subcarriers per RB used for multiplexing DMRS). This refers to the number of symbols transmitted via PUCCH for multiplexing UCI (excluding symbols used for multiplexing DMRS), and This refers to the modulation order of the UCI multiplexing in PUCCH transmission. The above determination of the power and number of RBs in PUCCH transmission is generally applicable when the UE multiplexes UCI types with different corresponding reception reliability in the same PUCCH transmission, for example, when the first UCI type is used for ultra-reliable service and the second UCI type is used for mobile broadband (MBB) service.

[0195] When separate coding is applied between the first HARQ-ACK codebook and the second HARQ-ACK codebook, the UE may reserve a first number of REs in the PUSCH transmission for multiplexing up to a specific number of bits of the first codebook, such as two bits, and reserve a second number of REs for multiplexing up to a specific number of bits of the second codebook, such as one bit.

[0196] For G-PDSCH reception, a Type-1 HARQ-ACK codebook can be constructed for unicast PDSCH reception using time slot timing values, a Time Domain Resource Allocation (TDRA) table, and an SCS configuration corresponding to the G-PDSCH reception. When HARQ-ACK information for detecting the DCI format of the scheduled G-PDSCH reception should also be provided, the TDRA table may additionally include entries for virtual G-PDSCH reception corresponding to the PDCCH MO of the DCI format used for scheduling 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 used for scheduling G-PDSCH reception, the TDRA table may only include the PDCCH MO of the DCI format used for scheduling G-PDSCH reception.

[0197] For Type-2 HARQ-ACK codebooks, since G-PDSCH reception is performed by a group of UEs, while U-PDSCH reception is performed by a single UE, the DAI field values ​​are set independently in the first DCI format for scheduling CG-PDSCH reception and the second DCI format for scheduling unicast PDSCH reception, and the corresponding first and second Type-2 HARQ-ACK codebooks are constructed independently. When a UE multiplexes the first and second Type-2 HARQ-ACK codebooks in a PUCCH transmission within a time slot, the UE can append the first HARQ-ACK codebook to the second HARQ-ACK codebook (or vice versa). The UE determines the PUCCH resources for PUCCH transmission in that time slot based on the DCI format detected by the UE in the last PDCCH MO from the first or second DCI format, in which the UE is instructed to provide HARQ-ACK information in that time slot.

[0198] The multiplexing of HARQ-ACK information codebooks in PUSCH can be based on principles similar to those in PUCCH. The UE can be configured to multiplex HARQ-ACK information received in response to G-PDSCH during PUSCH transmission. When the UE is configured for such multiplexing and used in the joint encoding of the first and second HARQ-ACK codebooks, the second HARQ-ACK codebook, such as the one corresponding to the G-PDSCH reception, can be appended to the first HARQ-ACK codebook, such as the one corresponding to the U-PDSCH reception. For the separate encoding of the two HARQ-ACK codebooks, the UE can be provided with... and Individual values ​​are used to determine the corresponding first and second quantities of coded modulation symbols used for multiplexing in PUSCH transmission. The DCI format indication is used in the PUSCH transmission schedule. In the case of a value of , this indicator can also be used The value, or the UE can be configured with an offset. To be applied to the indicated The corresponding table entry's index, and obtained the mapping to... The index of the table entry. If the index is less than or greater than the minimum or maximum index of the table entry, then UE determines... Each corresponds to a table entry with either the smallest or largest index.

[0199] Embodiments of this disclosure also describe PDCCH monitoring and scheduling of multicast PDSCH reception or unicast PDSCH reception. Such as Figure 15 The following examples and embodiments describe PDCCH monitoring and scheduling of multicast PDSCH reception or unicast PDSCH reception.

[0200] The embodiments of this disclosure describe a PDCCH monitoring aspect for detecting DCI format B for scheduling G-PDSCH reception. When a UE monitors a PDCCH according to a CSS to detect DCI format B, the UE allocates PDCCH monitoring capabilities with a higher priority to G-PDSCH reception than U-PDSCH reception. For example, this UE behavior can be detrimental when U-PDSCH reception has a higher priority than G-PDSCH reception. Since G-PDSCH reception is performed by multiple UEs, the serving gNB should be able to transmit a PDCCH in a time slot to schedule G-PDSCH reception, while also being able to transmit another PDCCH in the same time slot to schedule U-PDSCH reception or PUSCH transmission. However, when the UE always prioritizes the reception of PDCCH candidates monitored by the UE according to the CSS of the search space set associated with DCI format B, the UE may not have sufficient PDCCH monitoring capabilities to receive PDCCH candidates monitored by the UE according to the USS used to schedule U-PDSCH reception or PUSCH transmission.

[0201] In the first method, the UE monitors PDCCH candidates based on the USS to detect DCI format B. A new RNTI, G-RNTI, is introduced to scramble the CRC bits of the DCI format, and is... Initialize USS, where used The RNTI value is G-RNTI.

[0202] In the second method, the UE monitors PDCCH candidates based on the CSS to detect DCI format B. A new RNTI, G-RNTI, is introduced to scramble the CRC bits of DCI format B. The CSS can be... Initialization, or to avoid conflicts between DCI format B PDCCH candidates and other DCI format PDCCH candidates monitored by the UE according to CSS, by Initialization, where This is provided by a higher layer, such as the configuration of the search space set associated with DCI format B. However, the search space set configured for the UE to monitor PDCCH candidates based on CSS to detect DCI format B is not prioritized 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 the allocation of PDCCH candidates and non-overlapping CCEs to multiple search space sets associated with monitoring PDCCH candidates based on USS, relative to the search space set associated with monitoring PDCCH candidates based on CSS to detect DCI format B, or a number, such as one search space set, can be specified in system operation. 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.

[0203] Figure 15 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 1 To execute any of UE 111-116, for example Figure 3 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.

[0204] In step 1510, the UE (such as UE 116) receives a configuration for a search space set to monitor 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 monitoring the PDCCH 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 candidates and non-overlapping CCEs 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 candidates and non-overlapping CCEs 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, a corresponding search space index, relative to that search space set.

[0205] although Figure 15 Method 1500 is shown, but it is possible to... Figure 15 Make various changes. For example, although Figure 15Method 1500 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 1400 may be executed in different orders.

[0206] Figure 16 The structure of a user equipment (UE) according to an embodiment of this disclosure is shown.

[0207] refer to Figure 16 UE 1600 may include a controller 1610, a transceiver 1620, and a memory 1630. However, not all of the components shown are required. UE 1600 may be composed of components such as... Figure 16 It can be implemented with more or fewer components as shown. Furthermore, according to another embodiment, the controller 1610, transceiver 1620, and memory 1630 can be implemented as a single chip.

[0208] UE 1600 can correspond to the UE mentioned above. For example, UE 1600 can correspond to... Figure 3 UE in the middle.

[0209] The aforementioned components will now be described in detail.

[0210] Controller 1610 may include one or more processors or other processing devices that control the proposed functions, processes, and / or methods. Operation of UE 1600 may be implemented by controller 1610.

[0211] Transceiver 1620 may include an RF transmitter for up-converting and amplifying the transmitted signal, and an RF receiver for down-converting the received signal. However, according to another embodiment, transceiver 1620 may be implemented with more or fewer components than shown in the components.

[0212] Transceiver 1620 can be connected to controller 1610 and send and / or receive signals. These signals may include control information and data. Furthermore, transceiver 1620 can receive signals via a wireless channel and output signals to controller 1610. Transceiver 1620 can also transmit signals output from controller 1610 via a wireless channel.

[0213] Memory 1630 may store control information or data included in signals obtained by UE 1600. Memory 1630 may be connected to controller 1610 and store at least one instruction, protocol, or parameter for the proposed function, process, and / or method. Memory 1630 may include read-only memory (ROM) and / or random access memory (RAM) and / or hard disk and / or CD-ROM and / or DVD and / or other storage devices.

[0214] Figure 17 The structure of a base station according to an embodiment of this disclosure is shown.

[0215] Reference Figure 17 Base station 1700 may include controller 1710, transceiver 1720, and memory 1730. However, not all of the components shown are required. Base station 1700 may be composed of... Figure 17 It can be implemented with more or fewer components as shown. Furthermore, according to another embodiment, the controller 1710, transceiver 1720, and memory 1730 can be implemented as a single chip.

[0216] Base station 1700 may correspond to the gNB described in this disclosure. For example, base station 1700 may correspond to Figure 2 gNB in ​​the middle.

[0217] The aforementioned components will now be described in detail.

[0218] The controller 1710 may include one or more processors or other processing devices that control the proposed functions, processes, and / or methods. The operation of the base station 1700 may be implemented by the controller 1710.

[0219] Transceiver 1720 may include an RF transmitter for up-converting and amplifying the transmitted signal and an RF receiver for down-converting the received signal. However, according to another embodiment, transceiver 1720 may be implemented with more or fewer components than shown in the components.

[0220] Transceiver 1720 can be connected to controller 1710 and send and / or receive signals. These signals may include control information and data. Furthermore, transceiver 1720 can receive signals via a wireless channel and output signals to controller 1710. Transceiver 1720 can also transmit signals output from controller 1710 via a wireless channel.

[0221] The memory 1730 may store control information or data included in signals obtained by the base station 1700. The memory 1730 may be connected to the controller 1710 and store at least one instruction, protocol, or parameter for the proposed function, process, and / or method. The memory 1730 may include read-only memory (ROM) and / or random access memory (RAM) and / or hard disk and / or CD-ROM and / or DVD and / or other storage devices.

[0222] The flowchart above illustrates an example method that can be implemented according to the principles of this disclosure, and various modifications can be made to the method shown in the flowchart herein. For example, although shown as a series of steps, the individual steps in each diagram can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, steps can be omitted or replaced by other steps.

[0223] Although the accompanying drawings illustrate different examples of user equipment, various changes can be made to the drawings. For example, the user equipment can include any number of each component in any suitable arrangement. Generally, the drawings do not limit the scope of this disclosure to any particular configuration. Furthermore, while the drawings illustrate operating environments in which various user equipment features disclosed in this patent document can be used, these features can be used in any other suitable system.

[0224] Although this disclosure has been described with reference to exemplary embodiments, various changes and modifications will be apparent to those skilled in the art. This disclosure is intended to include such changes and modifications that fall within the scope of the appended claims. Nothing described herein should be construed as implying that any particular element, step, or function is essential and must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A method performed by a user equipment (UE) in a communication system, the method comprising: PDCCH monitoring is performed based on PDCCH candidates used for receiving the Physical Downlink Control Channel (PDCCH), where: PDCCH candidates for the first common search space (CSS) associated with the first downlink control information (DCI) format take precedence over PDCCH candidates for the second CSS associated with the second DCI format associated with scheduling multicast physical downlink shared channel (PDSCH) reception, or PDCCH candidates for the UE-specific search space (USS) associated with the third DCI format associated with scheduling unicast PDSCH reception. The order of PDCCH monitoring for the PDCCH candidates used for the second CSS and the PDCCH candidates used for the USS is based on configuration.

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