Signaling control information in communication system

Abstract

Provided are a method and an apparatus for decoding a downlink control information (DCI) format that schedules a physical uplink shared channel (PUSCH) transmission, includes a field indicating whether data information is multiplexed in the PUSCH, and is used to transmit the PUSCH with or without data information depending on the indication of the field.

Description

[0001] This application is a divisional application of the invention patent application with application date of January 2, 2019 and application number 201980007337.6. Technical Field

[0002] The present application generally relates to control schemes in wireless communication systems. More specifically, the present disclosure relates to signaling control information in wireless communication systems. Background Art

[0003] Fifth generation (5G) or new radio (NR) mobile communications (expected to start commercialization around 2020) are gaining momentum recently, with global technical activities in the industry and academia for various candidate technologies. Candidate enablers for 5G / NR mobile communications include massive antenna technology from traditional cellular frequency bands to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) to flexibly accommodate various services / applications with different requirements, new multiple access schemes to support massive connectivity, etc. The International Telecommunication Union (ITU) classifies the use scenarios of International Mobile Communications (IMT) in 2020 and beyond into three categories, such as enhanced mobile broadband, massive machine type communications (MTC), and ultra-reliable and low-latency communications. In addition, the ITC also specifies specific target requirements, such as a peak data rate of 20 Gigabits per second (Gb / s), a user experience data rate of 100 Mb / s, a 3x improvement in spectrum efficiency, support for mobility up to 500 km / h (km / h), 1 millisecond (ms) latency, a connection density of 106 devices / km2, a 100x improvement in network energy efficiency, and an area traffic capacity of 10Mb / s / m2. Although not all requirements need to be met at the same time, the design of the 5G / NR network can provide flexibility to support various applications that meet some of the above requirements based on the use case. Summary of the invention

[0004] Technical issues

[0005] The present disclosure relates to a quasi-fifth generation (5G) or 5G / NR communication system that will be provided to support higher data rates than fourth generation (4G) communication systems such as long term evolution (LTE). Embodiments of the present disclosure provide for signaling control information in an advanced communication system.

[0006] Problem Solution

[0007] In one embodiment, a method is provided. The method includes decoding a downlink control information (DCI) format. The DCI format schedules a physical uplink shared channel (PUSCH) transmission and includes a first field indicating whether data information is multiplexed in the PUSCH. The method also includes sending the PUSCH. Depending on the indication in the first field, the data information is multiplexed or not multiplexed in the PUSCH.

[0008] In another embodiment, a user equipment (UE) is provided. The UE includes a decoder configured to decode a downlink control information (DCI) format. The DCI format schedules a physical uplink shared channel (PUSCH) transmission and includes a first field indicating whether data information is multiplexed in the PUSCH. The UE also includes a multiplexer configured to multiplex or not multiplex data information in the PUSCH depending on an indication in the first field. The UE also includes a transmitter configured to send the PUSCH.

[0009] In yet another embodiment, a base station is provided. The base station includes an encoder configured to encode a downlink control information (DCI) format. The DCI format schedules a physical uplink shared channel (PUSCH) transmission and includes a first field indicating whether data information is multiplexed in the PUSCH. The base station also includes a demultiplexer configured to demultiplex or not demultiplex data information in the PUSCH depending on an indication in the first field. The base station also includes a receiver configured to receive the PUSCH.

[0010] Other technical features may be readily apparent to those skilled in the art from the following drawings, descriptions, and claims.

[0011] Advantageous Effects of the Invention

[0012] The present disclosure relates to a quasi-fifth generation (5G) or 5G / NR communication system that will be provided to support higher data rates than fourth generation (4G) communication systems such as long term evolution (LTE). Embodiments of the present disclosure provide for signaling control information in an advanced communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0014] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0015] Figure 2 An example gNB according to an embodiment of the present disclosure is shown;

[0016] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0017] Figure 4 shows an example DL slot structure according to an embodiment of the present disclosure;

[0018] Figure 5 An example UL slot structure for PUSCH transmission or PUCCH transmission according to an embodiment of the present disclosure is shown;

[0019] Figure 6 An example encoding process of a DCI format according to an embodiment of the present disclosure is shown;

[0020] Figure 7 An example decoding process for a DCI format used by a UE according to an embodiment of the present disclosure is shown.

[0021] Figure 8 An example transmitter block diagram of data information and UCI in PUSCH according to an embodiment of the present disclosure is shown;

[0022] Fig. 9 An example receiver block diagram showing data information and UCI in PUSCH according to an embodiment of the present disclosure is shown;

[0023] Fig.10 A flow chart of a method for determining a PUSCH for multiplexing HARQ-ACK information according to an embodiment of the present disclosure is shown;

[0024] Fig.11 A flow chart of a method for determining, by a UE, PUCCH transmission power based on spatial setting parameters of PUCCH resources according to an embodiment of the present disclosure is shown;

[0025] Fig.12 An exemplary UE behavior for multiplexing UCI from time-overlapping PUCCH transmissions in one of the PUCCH transmissions according to an embodiment of the present disclosure is shown;

[0026] Fig.13 An exemplary UE behavior for multiplexing UCI from time-overlapping PUCCH and PUSCH transmissions in a PUCCH transmission according to an embodiment of the present disclosure is shown;

[0027] Fig.14 A flow chart showing a method for determining a repetition number of a PUCCH transmission including a UCI payload based on a repetition number provided by a higher layer for a reference UCI payload according to an embodiment of the present disclosure;

[0028] Fig.15A flow chart of a method for determining the number of repetitions of PUCCH transmission based on the TCI state indicated in the DCI format that triggers PUCCH transmission according to an embodiment of the present disclosure is shown;

[0029] Fig.16 A flowchart of a method for determining PUCCH transmission power based on a UCI type included in a PUCCH transmission according to an embodiment of the present disclosure is shown; and

[0030] Fig.17 A flowchart of a method for determining the number of time slots used for PUCCH transmission based on a code rate and a number of time slots provided by a higher layer according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] Before the following detailed description, it may be advantageous to elaborate on the definitions of certain words and phrases used throughout this patent document. The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "send", "receive", and "communication" and their derivatives include both direct communication and indirect communication. The terms "include" and "comprising" and their derivatives mean including but not limited to; the term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean including, included in, interconnected with, included in, connected to, or connected with, coupled to, or coupled with, can communicate with, collaborate with, interweave, parallel, close to, bound to, or bound with, have, have... attributes, have a relationship with, or have a relationship with, etc. The term "controller" means any device, system, or part thereof that controls at least one operation. Such a controller can be implemented in hardware, or in a combination of hardware and software and / or firmware. The functionality associated with any particular function may be centralized or distributed, either locally or remotely. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one of the items in the list may be required. For example, "at least one of: "A, B, and C" includes any combination of: A, B, C, A and B, A and C, B and C, and A and B and C.

[0032] Moreover, various functions as described below can be implemented or supported by one or more computer programs, each of which is formed by computer-readable program code and is specifically implemented in computer-readable medium.Terms "application" and "program" refer to one or more computer programs, software components, instruction sets, programs, functions, objects, classes, examples, related data or a part thereof adapted to be implemented with suitable computer-readable program code.Phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code.Phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as read-only memory (ROM), random access memory (RAM), hard drive, compact disk (CD), digital video disk (DVD) or any other type of memory."Non-transient" computer-readable medium excludes wired, wireless, optical or other communication links that transmit transient electrical signals or other signals.Non-transient computer-readable medium includes a medium in which data can be permanently stored and a medium in which data can be stored and rewritten later, such as a rewritable optical disk or erasable memory device.

[0033] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art will understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0034] The following discussion Figures 1 to 17 , and the various embodiments used in this patent document to describe the principles of the present disclosure are merely by way of illustration and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0035] The following documents are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v15.1.0, “NR, Physical channels and modulation”; 3GPP TS 38.212 v15.1.0, “NR, Multiplexing and Channel coding”; 3GPP TS 38.213 v15.1.0, “NR, Physical Layer Procedures for Control”; 3GPP TS 38.214 v15.1.0, “NR, Physical Layer Procedures for Data”; 3GPP TS 38.321 v15.1.0, “NR, Medium Access Control (MAC) protocol specification”; and 3GPP TS 38.331 v15.1.0, “NR, Radio Resource Control (RRC) Protocol Specification”.

[0036] The following Figures 1 to 5 Various embodiments are described that are implemented in a wireless communication system and using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figures 1 to 3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the disclosure may be implemented in any suitably arranged communications system.

[0037] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0038] like Figure 1 As shown in FIG, the wireless network includes gNB 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (such as 10, a proprietary Internet Protocol (IP) network, or other data network).

[0039] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include UE 111, which may be located at a small business (SB); UE 112, which may be located at an enterprise (E); UE 113, which may be located at a WiFi hotspot (HS); UE 114, which may be located at a first residence (R); UE 115, which may be located at a second residence (R); and UE 116, which may be a mobile device (M) such as a cell phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs include UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other or with UE 116 using 5G / NR, LTE, LTE-A, WiMAX, WiFi, or other wireless communication technology.

[0040] Depending on the network type, the term "base station" or "BS" or "gNB" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wireless enabling device. The base station may provide wireless access according to one or more wireless communication protocols, for example, 5G / NR 3GPP new radio interface / access, long term evolution (LTE), advanced LTE (LTE-A), high speed packet access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" / "gNB" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" can refer to any component, such as a "mobile station", "subscriber station", "remote terminal", "wireless terminal", "reception point" or "user device". For convenience, the terms "user equipment" and "UE" used in this patent document refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device such as a mobile phone or a smart phone or a generally considered fixed device such as a desktop computer or a vending machine.

[0041] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as being approximately circular for purposes of illustration and description only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and artificial obstacles.

[0042] As described in more detail below, one or more of the UEs 111-116 include circuits, programs, or a combination thereof for effectively signaling control information in an advanced wireless communication system. In certain embodiments, and one or more of the gNBs 101-103 include circuits, programs, or a combination thereof for effectively signaling control information in an advanced wireless communication system.

[0043] Although Figure 1 An example of a wireless network is shown, but Figure 1 Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs arranged appropriately. Also, gNB 101 may communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNB 101, gNB 102, and / or gNB 103 may provide access to other external networks or additional external networks such as an external telephone network or other types of data networks.

[0044] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 gNB 101 and gNB 103 may have the same or similar configuration. However, gNBs come in a variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0045] like Figure 2 As shown in FIG. 1 , gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0046] The RF transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals sent by UEs in the network 100. The RF transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuit 220, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuit 220 sends the processed baseband signals to the controller / processor 225 for further processing.

[0047] 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 outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 210a-210n receive the outgoing processed outgoing baseband or IF signals from the TX processing circuit 215 and up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.

[0048] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of forward channel signals and the transmission of reverse channel signals via the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming operations or directional routing operations in which outgoing signals from multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. Any of a variety of other functionality may be supported in the gNB 102 via the controller / processor 225.

[0049] Controller / processor 225 is also capable of running programs and other processes, such as an OS, that reside in memory 230. Controller / processor 225 may move data into or out of memory 230 as required by the running processes.

[0050] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 can support communication via any appropriate (multiple) wired or wireless connections. For example, when the gNB 102 is implemented as a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. For example, when the gNB 102 is implemented as an access point, the interface 235 can allow the gNB 102 to communicate via a wired or wireless local area network, or via a wired or wireless connection to a larger network (such as the Internet). The interface 235 includes any appropriate structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0051] 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 ROM.

[0052] Although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include any number of Figure 2 As a specific example, the access point may include multiple interfaces 235, and the controller / processor 225 may support routing functions to route data between different network addresses. As another specific example, although the gNB 102 is shown as including a single instance of the TX processing circuit 215 and a single instance of the RX processing circuit 220, the gNB 102 may include multiple instances of each (such as one per RF transceiver). In addition, according to specific needs, Figure 2 Various components in may be combined, further subdivided, or omitted, and additional components may be added.

[0053] Figure 3 An example UE 116 according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs appear in a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0054] like Figure 3As shown in FIG. 1 , UE 116 includes antenna 305, radio frequency (RF) transceiver 320, TX processing circuit 315, microphone 320, and (receive) RX processing circuit 325. UE 116 also includes speaker 330, main processor 340, input / output (I / O) interface (IF) 345, touch screen 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0055] The RF transceiver 310 receives incoming RF signals from the antenna 305 transmitted by the gNB of the network 100. The RF transceiver 310 down-converts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to the RX processing circuit 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. For further processing, the RX processing circuit 325 sends the processed baseband signal to the speaker 330 (such as for voice data) or to the main processor 340 (such as for web browsing data).

[0056] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing 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 outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0057] The processor 340 may include one or more processors or other processing devices and runs an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0058] The processor 340 is also capable of running other processes and programs resident in the memory 360, such as processes for beam management. The processor 340 is capable of moving data into or out of the memory 360 as required by the running processes. In some embodiments, the processor 340 is configured to run applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The processor 340 is also coupled to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0059] Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 can enter data into UE 116 using touch screen 350. Display 355 may be a liquid crystal display, light emitting diode display, or other display capable of presenting text and / or at least limited graphics (such as from a website).

[0060] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), while another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0061] Although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, according to specific needs, Figure 3 Various components in may be combined, further subdivided, or omitted, and additional components may be added. As a specific example, processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0062] In order to meet the growing demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G / NR or quasi-5G / NR communication systems. Therefore, 5G / NR or quasi-5G / NR communication systems are also referred to as "super 4G networks" or "post-LTE systems". 5G / NR communication systems are considered to be implemented in higher frequency (mmWave) bands, for example, in the 60GHz band, in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple input multiple output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems. In addition, in 5G / NR communication systems, research and development for system network improvements are being carried out based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, cooperative communications, coordinated multi-point (CoMP), receiving end interference elimination, etc. In 5G / NR systems, hybrid FSK with QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0063] A communication system includes a downlink (DL) and an uplink (UL), where the downlink refers to transmission from a base station or one or more transmission points to a UE, and the uplink refers to transmission from a UE to a base station or one or more reception points.

[0064] The time unit for DL ​​signaling or UL signaling on a cell is called a time slot and may include one or more time slot symbols. A time slot symbol may also serve as an additional time unit. A frequency (or bandwidth (BW)) unit is called a resource block (RB). An RB includes multiple subcarriers (SCs). For example, a time slot may have a duration of 0.5 milliseconds or 1 millisecond, include 14 symbols, and an RB may have a BW of 180 KHz and include 12 SCs with an inter-SC spacing of 15 KHz or 30 KHz, and so on.

[0065] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB 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 slot symbols including one slot symbol.

[0066] The gNB transmits one or more of multiple types of RS including Channel State Information RS (CSI-RS) and Demodulation RS (DMRS). CSI-RS is mainly used by UE to perform measurements and provide Channel State Information (CSI) to the gNB. For channel measurement, non-zero power CSI-RS (NZP CSI-RS) resources are used. For Interference Measurement Report (IMR), CSI Interference Measurement (CSI-IM) resources associated with Zero Power CSI-RS (ZP CSI-RS) configuration are used. The CSI process consists of NZP CSI-RS and CSI-IM resources.

[0067] The UE can determine the CSI-RS transmission parameters through DL control signaling or high-layer signaling (such as radio resource control (RRC) signaling from the gNB). DMRS is sent in the BW of the corresponding PDCCH or PDSCH, and the UE can use DMRS to demodulate data or control information.

[0068] Figure 4 An example DL slot structure 400 is shown according to an embodiment of the present disclosure. Figure 4 The illustrated embodiment of the DL slot structure 400 is for illustration only and may have the same or similar configuration. Figure 4 The scope of the present disclosure is not limited to any particular implementation.

[0069] DL time slot 410 includes Symbol 420, in which the gNB can send data information, DCI or DMRS. The DL system BW includes RBs. Each RB includes For PUCCH transmission bandwidth, the UE is allocated M PDSCH RBs, total SC 430. The PDCCH that transmits DCI is sent through control channel elements (CCEs), which are basically distributed over the DL system BW. The first time slot symbol 440 can be used by the gNB to send PDCCH. The second time slot symbol 450 can be used by the gNB to send PDCCH or PDSCH. The remaining time slot symbols 460 can be used by the gNB to send PDSCH and CSI-RS. In some time slots, the gNB can also send synchronization signals and channels that transmit system information.

[0070] The UL signal also includes a data signal that transmits information content, a control signal that transmits UL control information (UCI), a DMRS associated with data or UCI demodulation, a sounding RS (SRS) that enables the gNB to perform UL channel measurement, and a random access (RA) preamble that enables the UE to perform random access. The UE sends data information or UCI through the corresponding physical UL shared channel (PUSCH) or physical UL control channel (PUCCH). PUSCH or PUCCH can be sent on a variable number of time slot symbols including one time slot symbol. When the UE sends data information and UCI at the same time, the UE can multiplex both in PUSCH and discard PUCCH transmission.

[0071] UCI includes Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information (which indicates correct or incorrect detection of a data transport block (TB) in the PDSCH), Scheduling Request (SR) (which indicates whether the UE has data in the UE's buffer), and CSI report (which enables the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE). HARQ-ACK information can be configured with a smaller granularity than each TB and can be each data code block (CB) or each data CB group, where a data TB includes multiple data CBs.

[0072] The CSI report from the UE may include: a channel quality indicator (CQI), which informs 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), which informs the gNB how to combine signals from multiple transmitter antennas according to the multiple-input multiple-output (MIMO) transmission principle; and a rank indicator (RI), which indicates the transmission rank of the PDSCH.

[0073] UL RS includes DMRS and SRS. DMRS is sent only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRS to demodulate the information in the corresponding PUSCH or PUCCH. The UE sends SRS to provide UL CSI to the gNB, and for TDD systems, SRS transmission can also provide PMI for DL ​​transmission. In addition, in order to establish synchronization or initial high-layer connection with the gNB, the UE can send a physical random access channel (PRACH).

[0074] Figure 5 An example UL slot structure 500 for PUSCH transmission or PUCCH transmission according to an embodiment of the present disclosure is shown. Figure 5 The illustrated embodiment of the UL timeslot structure 500 is for illustration only and may have the same or similar configuration. Figure 5The scope of the present disclosure is not limited to any particular implementation.

[0075] like Figure 5 As shown, time slot 510 includes Symbol 520, in which the UE sends data information, UCI or DMRS. The UL system BW includes RBs. Each RB includes For PUSCH transmission bandwidth ("X" = "S") or PUCCH transmission bandwidth ("X" = "C"), the UE is allocated M PUXCH RBs, total SCs 530. The last one or more time slot symbols may be used to multiplex SRS transmissions 550 or short PUCCH transmissions from one or more UEs.

[0076] The number of multiple UL time slot symbols that can be used for data / UCI / DMRS transmission is Among them, N SRS is the number of time slot symbols used for SRS transmission. Therefore, the total number of REs for PUXCH transmission is PUCCH transmission and PUSCH transmission may also occur in the same slot; for example, the UE may send PUSCH in an earlier slot symbol and PUCCH in a later slot symbol, and then the slot symbols used for PUCCH are not available for PUSCH, or vice versa.

[0077] A hybrid slot includes a DL transmission region, a guard period region, and a UL transmission region, similar to a special subframe in the LTE specification. For example, the DL transmission region may include PDCCH and PDSCH transmissions, while the UL transmission region may include PUCCH transmissions. For example, the DL transmission region may include PDCCH transmissions, while the UL transmission region may include PUSCH and PUCCH transmissions.

[0078] DL and UL transmissions may be based on an Orthogonal Frequency Division Multiplexing (OFDM) waveform, including a variant that uses DFT precoding, referred to as DFT-spread OFDM.

[0079] The UE typically monitors multiple candidate positions for each potential PDCCH reception to decode the DCI format in the time slot. The DCI format includes a cyclic redundancy check (CRC) bit to enable the UE to confirm the correct detection of the DCI format. The DCI format type is identified by a radio network temporary identifier (RNTI), which scrambles the CRC bits. For DCI formats that schedule PDSCH or PUSCH to a single UE, the RNTI can be a cell RNTI (C-RNTI) or a variant of C-RNTI (such as CS-RNTI or MCS-C-RNTI), and acts as a UE identifier. For DCI formats that schedule PDSCH that transmits system information (SI), the RNTI can be an SI-RNTI. For DCI formats that schedule PDSCH that provides a random access response (RAR), the RNTI can be an RA-RNTI. For DCI formats providing TPC commands, the RNTI can be TPC-PUSCH-RNTI, TPC-PUCCH-RNTI or TPC-SRS-RNTI to associate the TPC command value with the transmission power of PUSCH, PUCCH or SRS, respectively. Each RNTI type can be configured to the UE via high-layer signaling such as RRC signaling. The DCI format that schedules PDSCH transmissions to the UE is also called DL DCI format or DL ​​allocation, while the DCI format that schedules PUSCH transmissions from the UE is also called UL DCI format or UL grant.

[0080] Figure 6 An example encoding process 600 of a DCI format according to an embodiment of the present disclosure is shown. Figure 6 The illustrated embodiment of the encoding process 600 of the DCI format is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.

[0081] The gNB encodes and transmits each DCI format in the corresponding PDCCH separately. The RNTI masks the CRC of the DCI format codeword to enable the UE to identify the DCI format. For example, the CRC and RNTI may include 16 bits. The CRC of the (uncoded) DCI format bits 610 is determined using a CRC calculation unit 620, and the CRC is masked using an exclusive OR (XOR) operation unit 8630 between the CRC bits and the RNTI bits 640. 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 added to the DCI format information bits using a CRC append unit 650. The encoder 660 performs channel coding (such as tail-biting convolutional coding or polar coding), followed by rate matching of the allocated resources by a rate matcher 670. The interleaving and modulation unit 680 applies interleaving and modulation, such as QPSK, and transmits an output control signal 690.

[0082] Figure 7 An example receiving and decoding process 700 for a DCI format for use by a UE according to an embodiment of the present disclosure is shown. Figure 7 The illustrated embodiment of the decoding process 700 of the DCI format of the UE is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.

[0083] The received control signal 710 is demodulated and deinterleaved by a demodulator and deinterleaver 720. The rate matching applied at the gNB transmitter is recovered by a rate matcher 730 and the resulting bits are decoded by a decoder 740. After decoding, a CRC extractor 750 extracts the CRC bits and provides DCI format information bits 760. The DCI format information bits are demasked 770 by an XOR operation with the RNTI 780 (when applicable) and a CRC check is performed by unit 790. When the CRC check succeeds (checksum is zero), the DCI format information bits are considered valid. When the CRC check does not succeed, the DCI format information bits are considered invalid.

[0084] The UE may send HARQ-ACK in a PUCCH or in a PUSCH corresponding to multiple PDSCH receptions of the UE. The UE may determine a HARQ-ACK information payload corresponding to all non-overlapping PDSCH receptions for which the UE may send corresponding HARQ-ACK information in the same PUSCH or PUCCH (semi-static HARQ-ACK codebook), or based on a DL allocation indicator (DAI) field included in a DCI format for scheduling PDSCH receptions to the UE or included in a DCI format for scheduling PUSCH transmissions from the UE (dynamic HARQ-ACK codebook). When a UE has multiple scheduled PUSCH transmissions, it is advantageous for the reception reliability of the HARQ-ACK information or data information to provide the UE with a way to determine one of the PUSCH transmissions for multiplexing the HARQ-ACK information or typically the UCI.

[0085] When the UE sends HARQ-ACK bits in the PUSCH, the UE determines the number Q′ of coded modulation symbols per layer for HARQ-ACK as shown in Equation 1.

[0086]

[0087] Among them, O ACK is the number of HARQ-ACK bits; L is the number of CRC bits (if any); is the scheduled bandwidth for PUSCH transmission, expressed as the number of subcarriers; is the number of symbols transmitted by PUSCH, excluding all symbols used for DMRS; C UL-SC is the number of code blocks used for UL-SCH in PUSCH transmission; K r is the rth code block size used for UL-SCH in PUSCH transmission; is the number of subcarriers in a symbol carrying PTRS in a PUSCH transmission; is the number of symbols carrying PTRS in PUSCH transmission; Is a collection The number of elements in is the set of resource elements available for transmission of UCI in symbol l, as well as is the total number of PUSCH symbols; and is a ceiling function that rounds a number to the next higher integer.

[0088] When the UE sends the CSI part 1 in the PUCCH channel, the UE determines the number of coded modulation symbols per layer Q′ CSI，1 , as shown in Equation 2.

[0089]

[0090] Among them, O CSI，1 is the number of bits in CSI Part 1; L is the number of CRC bits (if any) used for the encoding of CSI Part 1; And if the number of HARQ-ACK information bits is greater than 2, then Q′ ACK is the number of coded modulation symbols per layer of HARQ-ACK transmitted on PUSCH, and if the number of HARQ-ACK information bits is 1 or 2 bits, then in, is the set of reserved resource elements for potential HARQ-ACK transmission of symbol, as well as yes The remaining symbols are similar to those described for HARQ-ACK and are not described again for brevity.

[0091] When the UE sends the CSI part 2 in the PUSCH channel, the UE determines the number of coded modulation symbols per layer Q′ CSI，1 , as shown in Equation 3.

[0092]

[0093] Among them, O CSI，2 is the number of bits of CSI Part 2 (if any); L is the number of CRC bits used for CSI Part 2 encoding; If the number of HARQ-ACK information bits is greater than 2, then Q′ ACK is the number of coded modulation symbols per layer of HARQ-ACK sent on PUSCH, and if the number of HARQ-ACK information bits is 1 or 2 bits, then Q′ ACK = 0; and Q′ CSI，1 is the number of coded modulation symbols per layer of CSI Part 1 sent on PUSCH. The remaining symbols are similar to those described for HARQ-ACK and are not described again for brevity.

[0094] For UCI multiplexed in PUSCH, when the HARQ-ACK payload is 1 or 2 bits, the HARQ-ACK coded modulation symbols puncture the data coded modulation symbols or the CSI part 2 coded modulation symbols, and when the HARQ-ACK payload is greater than 2 bits, the HARQ-ACK coded modulation symbols are rate-matched with the data coded modulation symbols or the CSI part 2 coded modulation symbols, respectively. Set of REs is reserved in symbol for potential HARQ-ACK transmission.

[0095] A PUSCH transmission may transmit only A-CSI and may also include HARQ-ACK without any UL-SCH data information. When the UE multiplexes UCI only in a PUSCH transmission (without UL-SCH data information) and the UE also sends HARQ-ACK information bits, the UE determines the number of coded symbols Q' of HARQ-ACK as in Equation 4, where And the rest of the notation is as before:

[0096]

[0097] The number Q′ of coded modulation symbols of the UCI type of each layer is determined based on the A single corresponding value in a collection of values The single corresponding It is configured by the gNB to the UE through higher layer signaling or indicated to the UE using a field in the DCI format for scheduling PUSCH transmission, such as, for example, using a 2-bit field to indicate four predetermined values one of the.

[0098] In the case where no data information is multiplexed in the PUSCH transmission, using Equation 4 to derive the number of modulation symbols for the HARQ-ACK code would result in significant over-dimensioning, since CSI，1 The total CSI payload is not reflected and if the A set of values, for example, according to the HARQ-ACK payload, The value may be significantly larger than required, for example an order of magnitude larger, because The value is usually chosen for multiplexing HARQ-ACK in PUSCH including data information, and because the target BLER for data information is usually significantly larger than the target BLER for CSI. Note that for a given HARQ-ACK information target BLER, The value is typically inversely proportional to the target BLER for the information type (data or CSI) used as a reference for determining the number of HARQ-ACK coded modulation symbols.

[0099] Figure 8 An example transmitter block diagram 800 of data information and UCI in a PUSCH according to an embodiment of the present disclosure is shown. Figure 8 The illustrated embodiment of transmitter block diagram 800 is for illustration only and may have the same or similar configuration. Figure 8 The scope of the present disclosure is not limited to any particular implementation.

[0100] refer to Figure 8 , coded CSI information bits 805 (if any), coded HARQ-ACK information bits 810 (if any), and coded data information bits 820 (if any) are multiplexed by a multiplexer 830. When the number of HARQ-ACK bits is less than 2, the coded HARQ-ACK modulation symbols (if any) puncture the data and / or CSI modulation symbols, and when the number of HARQ-ACK bits is greater than 2, the coded HARQ-ACK modulation symbols are rate matched with the data and / or CSI modulation symbols. The number of HARQ-ACK or CSI coded modulation symbols may be determined by a processor (not shown), for example, as in Equations 1 to 3. When a DFT-S-OFDM waveform is used for transmission, a DFT unit 840 applies a discrete Fourier transform (DFT) (in the case of an OFDM waveform, DFT is not applied), a RE 850 corresponding to the PUSCH transmission BW is selected by a selector 855, an IFFT unit 860 performs IFFT, an output is filtered by a filter 870, a certain power is applied to the output by a power amplifier (PA) 880, and then a signal 890 is transmitted. If any of the data information, CSI, or HARQ-ACK information is not multiplexed, then Figure 8 Blocks corresponding to the corresponding transmitter processing functions are omitted. For simplicity, additional transmitter circuits such as digital-to-analog converters, filters, amplifiers, and transmitter antennas, as well as encoders and modulators for data symbols and UCI symbols are omitted.

[0101] Fig. 9 An example receiver block diagram of data information and UCI in PUSCH according to an embodiment of the present disclosure is shown. Fig. 9 The embodiments of the receiver block diagrams shown are for illustration only and may have the same or similar configurations. Fig. 9 The scope of the present disclosure is not limited to any particular implementation.

[0102] refer to Fig. 9, the received signal 910 is filtered by a filter 920, an FFT unit 930 applies FFT, a selector unit 940 selects REs 950 used by the transmitter, an inverse DFT (IDFT) unit applies IDFT 960 when a DFT-S-OFDM waveform is used for transmission, and a demultiplexer 970 separates the coded CSI information bits 980 (if any), the coded HARQ-ACK information bits (if any) 985, and the coded data information bits (if any) 990 before providing them to the corresponding decoders. The number of HARQ-ACK or CSI coded modulation symbols may be determined by a processor (not shown), for example, as in Equations 1 to 3. For simplicity, additional receiver circuits such as channel estimators, demodulators and decoders for data and UCI symbols are not shown.

[0103] The transmitter and receiver structure for PUCCH depends on the PUCCH format and can be similar to the transmitter and receiver structure for PUSCH (without data information). For example, for the first PUCCH format, the transmitter and receiver structure can be as follows: Figure 8 and Fig. 9 The corresponding transmitter and receiver shown in the figure, and for the second PUCCH format, the orthogonal cover code can be Figure 8 before the DFT filter or Fig. 9 The IDFT filter in is then applied. The corresponding description is known in the art and is omitted for brevity.

[0104] When the UE sends HARQ-ACK information in the PUCCH in response to a PDSCH reception scheduled by the associated DCI format, the corresponding PUCCH resources may be indicated by the PUCCH resource indicator field in each of the DCI formats. Depending on the corresponding PUCCH format, the PUCCH resources may include several parameters. For example, for a PUCCH transmission, the PUCCH resources may include the index of the first symbol in the slot, the number of symbols in the slot, and the index of the first RB before frequency hopping and the index of the first RB after frequency hopping (if applicable).

[0105] In order to avoid increasing the number of bits of the PUCCH resource indicator field, the explicit PUCCH resource indication may be supplemented with an implicit PUCCH resource indication. For example, when the UE is configured with a set of four PUCCH resources, a 2-bit PUCCH resource indicator field may be used to indicate PUCCH resources from the set of four PUCCH resources, and implicit determination is not applicable, whereas when the UE is configured with a set of more than four PUCCH resources, a 2-bit PUCCH resource indicator field may be used to indicate a subset from the set of PUCCH resources, and implicit determination of PUCCH resources from the subset of PUCCH resources may be additionally applied.

[0106] PUCCH can be transmitted according to one of multiple PUCCH formats. Since different UCI payloads require different PUCCH transmission structures to improve the associated UCI BLER, the PUCCH format corresponds to a structure designed for the maximum number of symbols or a specific UCI payload range. PUCCH transmission is also associated with a transmission configuration indicator (TCI) state that provides a spatial domain filter for PUCCH transmission.

[0107] An important feature of 5G networks is the flexibility provided for multiple UL symbols in a time slot, and various subcarrier spacing (SCS) values ​​are used, such as 15 kilohertz (kHz), 60 kHz, etc. The presence of fewer UL symbols in a time slot or the use of larger SCS values ​​results in reduced total received energy of PUCCH transmissions relative to a time slot that includes only UL symbols or relative to the use of smaller SCS values. To avoid this problem and achieve reliable reception of PUCCH transmissions, the UE can be configured by higher layers for the number of repetitions of PUCCH transmissions over a corresponding number of time slots.

[0108] When the UE is not power limited, the UE can compensate for the reduced number of time slot symbols used for PUCCH transmission or for a higher SCS by increasing the PUCCH transmission power. For example, as shown in Equation 5, at PUCCH transmission opportunity i, the UE can use the PUCCH power control adjustment state with index, to determine the PUCCH transmission power P on the active UL BWP b of carrier f in cell C. PUCCH,b,f，c (i, q u ,q d , l).

[0109]

[0110] where the corresponding parameters are described in 3GPP TS 38.213v15.1.0, “NR, Physical Layer Procedures for Control”, μ is the SCS configuration, and Δ TF，b，f，c (i) is the PUCCH transmission power adjustment, which takes into account the amount of available resources for PUCCH transmission during a certain occasion i.

[0111] For PUCCH format 1, in, is the number of symbols per time slot, and is the number of PUCCH transmission symbols in PUCCH transmission opportunity i. For PUCCH format 3 or PUCCH format 4, and for PUCCH transmission opportunity i in PUCCH transmission opportunity i UCI =n HARQ-ACK +O SR +O CSI ≤11 bits, Δ TF，b，f，c (i) = 10log 10 (K 1 ·(n HARQ-ACK +O SR +O CSI ) / N RE ), where K 1 =6,n HARQ-ACK is the number of actual HARQ-ACK information bits determined by the UE as described in reference 3, O SR is the number of SR information bits, O CSI is the number of CSI information bits, and N RE is the number of REs used for UCI transmission. For PUCCH format 3 or PUCCH format 4, and for PUCCH transmission opportunity i, UCI =O HARQ-ACK +O SR +O CSI >11 bits, K 2 =2.4, BPRE=(O ACK +O SR +O CSI +O CRC ) / N RE , and O ACK is the total number of HARQ-ACK information bits.

[0112] When the gNB determines that the UE cannot increase the transmit power to achieve the desired UCI reception reliability for PUCCH transmissions over multiple symbols of a slot, the gNB may configure the UE with a number of repetitions of PUCCH transmissions over a corresponding number of slots in order to increase the time for PUCCH reception and increase the total PUCCH reception energy. Since the required PUCCH transmission power depends on the number of UCI bits included in the PUCCH, the number of repetitions of PUCCH transmissions from UEs that cannot increase the PUCCH transmission power should depend on the number of UCI bits included in the PUCCH.

[0113] A PUCCH transmission with repetition may include a single UCI type or multiple UCI types. Having a single UCI type and not multiplexing other UCI types in a PUCCH transmission avoids having to increase the number of PUCCH repetitions to accommodate a larger UCI payload when corresponding PUCCH transmissions including that UCI type overlap in time, and thus reduces reception latency for a single UCI type at the expense of the UE discarding transmissions of other UCI types. Having multiple UCI types in a PUCCH transmission with repetition has an inverse tradeoff to having a single UCI type in a PUCCH transmission with repetition and discarding the other UCI types.

[0114] Different UCI types may also have different reception reliability requirements. For example, the reception reliability of HARQ-ACK information may be 0.1%, while the reception reliability of CSI may be 5%. Therefore, for PUCCH transmission without repetition, the PUCCH transmission power may depend on the UCI type, while for PUCCH transmission with repetition, the number of repetitions may depend on the UCI type.

[0115] Due to UE mobility or changes in the corresponding channel medium, the reception point at the gNB may change dynamically. For example, the current beam used for PUCCH reception may become suboptimal and a new beam may not be immediately available, requiring the gNB to use a wider beam for PUCCH reception and experience a reduced signal-to-noise and interference ratio (SINR) for PUCCH reception. For example, PUCCH may be dynamically received from one reception point or from multiple reception points, and in the latter case, the SINR for PUCCH reception may increase. In order for the gNB to be able to receive the UCI in the PUCCH with the desired reliability, the gNB may dynamically adjust the PUCCH transmission power from the UE. When the UE is power limited, it is beneficial for the gNB to be able to dynamically adjust the number of repetitions of the PUCCH transmission from the UE.

[0116] In addition to adjusting the power or the number of repetitions of PUCCH transmission depending on the UCI payload, the UE can discard some UCI when the total UCI payload and the number of PUCCH REs available for UCI transmission result in a code rate that is greater than the code rate provided by the upper layer to the UE. The UE then discards part of the UCI, such as the second part CSI report, until the resulting code rate is less than or equal to the code rate provided by the upper layer. When further discarding of UCI is not possible, such as when the UE has discarded all CSI reports and the remaining UCI only includes HARQ-ACK information, and the resulting code rate remains greater than the code rate provided by the upper layer, the UE sends UCI at the resulting code rate. Instead of the UE discarding UCI or potentially having to send UCI at a code rate greater than the code rate provided by the upper layer, it is beneficial to enable the UE to avoid discarding UCI or to enable the UE to send UCI at a code rate less than or equal to the code rate provided by the upper layer.

[0117] Another important feature of 5G networks is the flexibility provided for the timing of UL transmissions. The time slot for the transmission of the PUCCH for transmitting the corresponding HARQ-ACK information can be indicated to the UE by the DCI format for scheduling PDSCH reception or the release of semi-persistent scheduling (SPS) PDSCH. The resources used for PUCCH transmission can also be indicated to the UE, which include the first symbol in the time slot. Similarly, the DCI format for scheduling PUSCH transmission can indicate the corresponding time slot for PUSCH transmission and the first symbol within the time slot. The UE can also have periodic or semi-persistent PUSCH or PUCCH transmissions.

[0118] The UE may or may not be able to send PUSCH and PUCCH simultaneously in the UL bandwidth part (BWP) of the serving cell. When the UE cannot send PUSCH and PUCCH simultaneously, the UE discards the PUCCH transmission and multiplexes the corresponding UCI, such as HARQ-ACK information or CSI, in the PUSCH transmission. In addition, the UE may or may not be able to send multiple PUCCHs simultaneously in the UL bandwidth part (BWP) of the serving cell. When the UE cannot send multiple PUCCHs simultaneously, the UE discards all PUCCH transmissions except one PUCCH transmission (in which the UE multiplexes all UCI). When the corresponding PUCCH or PUSCH transmission starts at the same symbol of the same time slot, the UE is expected to perform the above functions. However, when the corresponding PUCCH or PUSCH transmission starts at different symbols of the same time slot, the UE is generally unable to perform the above functions. In addition, under certain conditions related to the UE processing time, the UE may not be able to perform the above functions even when the corresponding PUCCH or PUSCH transmission starts at the same symbol of the same time slot.

[0119] When the UE is not able to multiplex UCI from multiple PUCCH transmissions in a single PUCCH transmission, or when the UE is not able to multiplex UCI in a PUCCH transmission, the UE also needs to determine which PUCCH transmission to prioritize (or, equivalently, one or more PUCCH transmissions to discard), or determine whether to prioritize PUSCH transmissions or PUCCH transmissions.

[0120] Therefore, there is a need to provide accurate determination of the number of HARQ-ACK coded modulation symbols in a PUSCH transmission that does not include data information.

[0121] There is also a need to provide a mechanism for determining the PUSCH used to multiplex UCI in case of multiple PUSCH transmissions.

[0122] There is also a need to provide a mechanism for implicitly determining PUCCH resources in conjunction with explicit determination of PUCCH resources.

[0123] It is also necessary to determine an adjustment factor of the PUCCH transmission power depending on a corresponding number of UCI bits or a corresponding type of UCI bits.

[0124] It is also necessary to define the UE behavior based on the conditions for multiplexing UCI in the same PUCCH or PUSCH transmission, or based on the conditions for dropping multiple PUCCH or PUSCH transmissions when multiplexing is not possible.

[0125] Priority rules and UE behavior for time-overlapping PUSCH or PUCCH transmissions also need to be defined.

[0126] It is also necessary to define the UE capabilities within which time the UE needs to cancel configured transmissions.

[0127] It is also necessary to adjust the number of repetitions of the PUCCH transmission based on the number of UCI bits conveyed by the PUCCH transmission.

[0128] There is also a need to be able to use different powers or different numbers of repetitions for PUCCH transmissions depending on the type of UCI included by the PUCCH transmissions.

[0129] It is also necessary to dynamically indicate the number of repetitions of PUCCH transmission.

[0130] Finally, it is also necessary to enable the UE to avoid discarding UCI or avoid sending UCI at a code rate greater than the code rate provided to the UE by the higher layer.

[0131] The present disclosure relates to a quasi-fifth generation (5G) or 5G communication system that will be provided to support higher data rates than fourth generation (4G) communication systems such as long term evolution (LTE). The present disclosure relates to providing an accurate determination of the number of HARQ-ACK coded modulation symbols in a PUSCH transmission that does not include data information. The present disclosure also relates to providing a mechanism for determining a PUSCH for multiplexing UCI in the case of multiple PUSCH transmissions. The present disclosure also relates to providing a mechanism for implicitly determining PUCCH resources in conjunction with an explicit determination of PUCCH resources. The present disclosure also relates to determining an adjustment factor for PUCCH transmission power depending on a corresponding number of UCI bits or corresponding types of UCI bits. The present disclosure also relates to defining a UE behavior according to a condition for multiplexing UCI in the same PUCCH or PUSCH transmission, or when multiplexing is not possible, according to a condition for discarding multiple PUCCH or PUSCH transmissions. The present disclosure also relates to defining priority rules and UE behavior for PUSCH or PUCCH transmissions that overlap in time. The present disclosure also relates to defining UE capabilities within the time when the UE needs to cancel a configured transmission. The present disclosure also relates to adjusting the number of repetitions of a PUCCH transmission based on the number of UCI bits transmitted by the PUCCH transmission. The present disclosure also relates to being able to use different powers or different numbers of repetitions for a PUCCH transmission depending on the type of UCI included by the PUCCH transmission. The present disclosure also relates to dynamically indicating the number of repetitions of a PUCCH transmission. Finally, the present disclosure relates to enabling a UE to avoid discarding UCI or to avoid sending UCI at a code rate greater than the code rate provided to the UE by a higher layer.

[0132] The first embodiment of the present disclosure considers determining a PUSCH for multiplexing HARQ-ACK from a UE when the UE transmits multiple PUSCHs during the same time slot.

[0133] Typically, PUSCH transmissions may have different characteristics, such as different amounts of available resources for multiplexing data information and UCI, due to being transmitted over a different corresponding number of RBs or time slot symbols, or having a different data MCS or spectral efficiency, or encountering interference or channel media with different propagation characteristics.

[0134] In addition, PUSCH transmission can be scheduled by DCI format and therefore have adaptive characteristics in related parameters (such as MCS / spectral efficiency and the total number of available REs), or can be configured by higher layers and have non-adaptive characteristics. Due to the dynamic nature of PUSCH transmission on different cells or carriers, while maintaining the desired target UCI reception reliability and minimizing the impact on the data information reception reliability in PUSCH, the selection of PUSCH for UCI multiplexing cannot usually be based solely on predetermined rules and needs to be dynamically determined.

[0135] One predetermined rule may be that when multiple PUSCH transmissions are available for HARQ-ACK (or typically UCI) multiplexing from the UE, the UE selects a PUSCH transmission scheduled by a DCI format rather than a PUSCH transmission configured by higher layers for HARQ-ACK multiplexing. Another predetermined rule may be that the UE selects a PUSCH transmission scheduled by a non-fallback DCI format rather than a PUSCH transmission scheduled by a fallback DCI format for HARQ-ACK multiplexing, where the non-fallback DCI format has a larger size than the fallback DCI format because the latter may be associated with PUSCH transmissions on cells where the UE is experiencing degraded communication reliability with the gNB. For example, in 3GPP TS 38.212 v15.1.0, “NR, Multiplexing and Channel coding”, DCI format 0_0 is a fallback DCI format and DCI format 0_1 ​​is a non-fallback DCI format.

[0136] In addition, the fallback DCI format does not include a beta_offset indicator field because the presence of this field is configurable when the non-fallback DCI format includes a beta_offset indicator field, and then the adjustment of the HARQ-ACK coded modulation symbols in the PUSCH transmission scheduled by the fallback DCI format is not as accurate as the adjustment in the PUSCH transmission scheduled by the non-fallback DCI format. The fallback DCI format may also not include a DAI field, which further causes the HARQ-ACK multiplexing in the corresponding PUSCH transmission to be less reliable than the PUSCH transmission scheduled by the non-fallback DCI format. In this case, if HARQ-ACK is multiplexed in a PUSCH transmission scheduled by a fallback UL DCI format that does not include a DAI field, the UE may use the DAI field from the non-fallback DCI format to determine the HARQ-ACK codebook for multiplexing in the PUSCH transmission.

[0137] Fig.10 A flowchart of a method 1000 for determining a PUSCH for multiplexing HARQ-ACK information according to an embodiment of the present disclosure is shown. Fig.10 The illustrated embodiment of method configuration 1000 is for illustration only and may have the same or similar configurations. Fig.10 The scope of the present disclosure is not limited to any particular implementation.

[0138] At 1010, the UE is configured to transmit a first PUSCH and a second PUSCH, and the UE has HARQ-ACK information multiplexed in the PUSCH. At 1020, the UE determines that the first PUSCH is scheduled by a fallback DCI format or a higher layer signaling, and the second PUSCH is scheduled by a non-fallback DCI format or a DCI format. At 1030, the UE multiplexes the HARQ-ACK information in the second PUSCH.

[0139] In PUSCH transmission scheduled by a corresponding non-fallback DCI format, the PUSCH used for HARQ-ACK multiplexing may be explicitly indicated by the corresponding DCI format or implicitly determined based on the characteristics of the PUSCH transmission.

[0140] In a first approach, at least for non-fallback DCI formats, the DCI format may include a 1-bit "HARQ-ACK_MULTIPLE_BASED" field that indicates whether the UE may multiplex HARQ-ACK in the associated PUSCH transmission. For example, a binary "0" may indicate HARQ-ACK multiplexing. For example, an explicit indication of a PUSCH for HARQ-ACK multiplexing also enables the gNB receiver to avoid multiple decoding operations when the UE fails to detect a DCI format that schedules a PUSCH transmission in which the gNB expects the UE to multiplex HARQ-ACK, and then the UE multiplexes HARQ-ACK in a different PUSCH that the gNB does not expect, or to avoid data buffer corruption when the gNB does not identify a PUSCH with HARQ-ACK multiplexing because the corresponding decoding failed or because the gNB did not perform multiple decoding operations on the UCI in the corresponding multiple PUSCH transmissions. When the UE does not detect a DCI format indicating that HARQ-ACK is multiplexed in a corresponding PUSCH transmission, the UE may send HARQ-ACK in the PUCCH, or the UE may not send HARQ-ACK.

[0141] As an alternative to introducing the "HARQ-ACK_multiplexing" field, at least in the non-fallback DCI format for scheduling PUSCH transmission, one or more states of the A-CSI request field may also be used to indicate that HARQ-ACK is multiplexed in the corresponding PUSCH. For example, for a 2-bit A-CSI request field, the value "01" may be used to indicate both the corresponding configuration of the A-CSI report and the HARQ-ACK multiplexing in the corresponding PUSCH. For example, any value of the A-CSI request field other than "00" may also indicate HARQ-ACK multiplexing in the corresponding PUSCH. For example, HARQ-ACK multiplexing may be in an indication of a PUSCH transmission that does not include data information.

[0142] In a second method, at least for non-fallback DCI formats, when the DAI field is included in the DCI format that schedules the corresponding PUSCH transmission, the DAI field can be used to implicitly indicate the PUSCH for HARQ-ACK multiplexing. For example, the DAI field in the DCI format that schedules a PUSCH transmission (in which the scheduling gNB expects the UE to multiplex HARQ-ACK) can have a first value, while the DAI field in the DCI format that schedules every other PUSCH transmission (in which the scheduling gNB does not expect the UE to multiplex HARQ-ACK) can have a second value different from the first value. At least when the UE detects only two DCI formats that schedule the respective PUSCH transmissions, the UE can determine the PUSCH transmission for multiplexing HARQ-ACK based on the two DAI values ​​in the two DCI formats and the counter DAI or total DAI value in the DCI format that schedules the UE's PDSCH reception (where the UE sends HARQ-ACK information in response to the PDSCH reception (including SPS PDSCH release)).

[0143] For example, when the DAI field of a DCI format that schedules a PUSCH transmission from a UE is represented by 1 bit, the DAI field may be equivalently used as a "HARQ-ACK_MULTIPLEXING" field by setting the value to, for example, "1" to indicate to the UE a PUSCH transmission for UCI multiplexing, and setting the value to "0" to indicate to the UE a PUSCH transmission without UCI multiplexing. The UE may expect that the UE may detect a DCI format that schedules a PUSCH transmission in different cells within the same time period, where the DAI field in one of the DCI formats is set to "1" and the DAI field in every other DCI format is set to "0", and the UE may not treat the detection of such a DCI format as an error event. Unless the UE is configured to multiplex UCI in multiple PUSCH transmissions, the UE may not expect to detect more than one DCI format with the UL DAI field equal to "1".

[0144] For example, when the DAI field in the DCI format for scheduling PUCCH transmission from the UE is represented by 2 bits, the DAI values ​​of the first DCI format and the second DCI format for scheduling the corresponding first PUCCH transmission and the second PUCCH transmission are "00" and "11", and the counter DAI of the last DCI format for scheduling PUCCH transmission detected by the UE is "00", the UE multiplexes HARQ-ACK in the first PUCCH transmission. For example, when the DAI values ​​in the first DCI format and the second DCI format for scheduling the corresponding first PUSCH transmission and the second PUSCH transmission are "00" and "11", and the counter DAI in the last DCI format for scheduling PUCCH transmission detected by the UE is "10", the UE multiplexes HARQ-ACK in the second PUSCH transmission.

[0145] In general, the DAI value in the DCI format that schedules a PUSCH transmission (in which the UE is expected to multiplex HARQ-ACK information) is the value that has the minimum difference (modulo 4 for 2 DAI bits) relative to the counter DAI value in the last DCI format detected by the UE and scheduled the UE's PDSCH reception.

[0146] In order to increase the probability that the UE detects a DCI format that schedules a PUSCH transmission in which the UE may multiplex HARQ-ACK information, the gNB may set the corresponding value of the HARQ-ACK multiplexing field according to the first method or the corresponding value of the DAI field according to the second method to be the same in more than one DCI format.

[0147] When there are more than one, the UE may select the PUSCH transmission for multiplexing the HARQ-ACK information based on additional criteria, such as in the PUSCH with the smallest index sent on the cell or carrier, or in the PUSCH transmission with the largest data MCS, or in the PUSCH that results in a smaller ratio of the number of HARQ-ACK coded modulation symbols relative to the number of data information coded modulation symbols or relative to the number of available resources for transmission of data information and UCI.

[0148] The second embodiment of the present disclosure considers determining the number of HARQ-ACK coded modulation symbols in a PUSCH including only UCI and not including data information.

[0149] For at least two reasons, using the formula of Equation 4 can result in significant over-dimensioning of the number of HARQ-ACK coded modulation symbols. The first reason is that if only the number of CSI Part 1 information bits is O CSI，1is considered as a reference for determining the number of HARQ-ACK coded modulation symbols, this number is usually small, such as about 10, and does not represent the total number of CSI bits, because the number of CSI Part 2 information bits is O CSI，2 Can be significantly greater than O CSI，1 , or equivalently, O CSI，1 +O CSI，2 It can be an order of magnitude or greater than O CSI，1 However, using O in Equation 4 CSI，1 +O CSI，2 Replace O CSI,1 It is actually impossible because the gNB does not know O before decoding CSI Part 1. CSI，2 value, and an incorrect determination may lead to an incorrect determination of the number of HARQ-ACK coded modulation symbols and a corresponding incorrect decoding of the HARQ-ACK codeword at the gNB.

[0150] The second reason is that the and The configuration is usually for the case where UL-SCH data information is also multiplexed in the corresponding PUSCH transmission. Then, for a target data information BLER that is approximately 10 times greater than the CSI BLER, the same BLER is used in PUSCH transmissions with data information and PUSCH transmissions without data information. The value may result in the number of HARQ-ACK coded modulation symbols exceeding by approximately 10 times.

[0151] In the first method, the number of HARQ-ACK coded modulation symbols in a PUSCH transmission without UL-SCH data information can be determined more accurately by using the reference CSI payload O in Equation 4. CSI,ref Replace O CSI，1 ,lead to Reference CSI Payload O CSI,ref The payload of CSI Part 1 and the corresponding predetermined payload of CSI Part 2 may be included. CSI，ref CRC bits used as part of the encoding process of CSI Part 1 or CSI Part 2 may also be included. Even when the actual CSI Part 2 payload is different from the predetermined payload, the determination of the number of HARQ-ACK coded modulation symbols is more accurate than using 0. CSI，1 Replace O CSI，ref More accurate.

[0152] In the second method, the number of HARQ-ACK coded modulation symbols in a PUSCH transmission without UL-SCH data information can be more accurately determined. This method is for the DCI format that schedules PUSCH transmissions from the UE to indicate the MCS / spectral efficiency used for CSI transmission. This can be achieved by including a 1-bit information field (the "data presence" field), which, in addition to triggering a CSI report from the UE (indicated by a non-zero value in the "CSI request" field), also indicates whether the UE interprets the DCI format as a scheduled transmission of data information. When the information field does not indicate the transmission of data information in the PUSCH, the MCS field of the DCI format indicates the MCS used for CSI transmission. The MCS CSI , where MCS CSI =Q m ·R, Q m is the modulation order, and R is the target code rate determined from the MCS field of the DCI format. Then, the number of HARQ-ACK coded modulation symbols can be determined as

[0153] Alternatively, O CSI The payload can be based on the MCS CSI and the number of PUSCH REs available for UCI multiplexing in PUSCH transmission (eg, excluding REs used for RS transmission).

[0154] In a third method, the number of HARQ-ACK coded modulation symbols in a PUSCH transmission without UL-SCH data information can be determined more accurately. The two sets of values ​​provide separate configurations, the first set for the case where the UE multiplexes data information in the PUSCH transmission and the second set for the case where the UE does not multiplex data information in the PUSCH transmission. This can also be extended to the case where CSI Part 1 or CSI Part 2 and HARQ-ACK / SR are encoded separately in the PUCCH. For example, the second set of values ​​(e.g., which may correspond to the corresponding set of HARQ-ACK payloads) The target CSI BLER may be considered instead of the target data BLER, and for example, when the target CSI BLER is less than the target data BLER, the target CSI BLER may have a value greater than The value whose corresponding value in the first set of values ​​is smaller.

[0155] also, The second set of values The value may take into account the payload of CSI Part 1, such as the determination of the number of HARQ-ACK coded modulation symbols in Equation 4, or may take into account a reference CSI payload, which may include the corresponding payloads of both CSI Part 1 and CSI Part 2, and may include CRC bits for the corresponding encoding process.

[0156] In the fourth method, the number of HARQ-ACK coded modulation symbols in PUSCH transmission without UL-SCH data information can be more accurately determined. This method is to apply the configuration of the code rate provided by the higher layer and used by the UE to determine the number of REs (coded modulation symbols) for HARQ-ACK or CSI part 1 multiplexed in PUCCH transmission using PUCCH format 3 or PUCCH format 4.

[0157] Then, joint coding for HARQ-ACK and CSI Part 1 information bits may be applied for transmission in PUSCH, just as for transmission in PUCCH (CSI Part 2 information bits are encoded separately). Otherwise, separate coding of HARQ-ACK information bits and CSI Part 1 information bits may be applied, where the number of HARQ-ACK coded modulation symbols is determined as the minimum value that results in a corresponding coding rate for HARQ-ACK information bits that is less than or equal to the coding rate provided by higher layers. The number of CSI Part 1 coded modulation symbols is determined as (a) the minimum number of CSI Part 1 coded modulation symbols that results in a corresponding coding rate for CSI Part 1 bits that is less than or equal to the coding rate provided by higher layers; and (b) the number of CSI Part 1 coded modulation symbols that can be multiplexed in the available PUSCH REs after excluding REs used for multiplexing HARQ-ACK and REs used for RS transmission.

[0158] The third embodiment of the present disclosure considers the association between the PUCCH resource indication to the UE and the UE's determination of a set of parameters used by the UE to calculate the PUCCH transmission power.

[0159] The association between PUCCH resources and the set of parameters used by the UE to calculate PUCCH transmission power can be based on the set Q of SS / PBCH block index or CSI-RS resource configuration used for path loss measurement. d (as shown in Equation 5) and corresponding to the set Q d The set Q of PUCCH space settings of SS / PBCH block index or CSI-RS resource configuration in p The mapping between them can be provided by higher layers.

[0160] When Q d d ​, the mapping can be based on a set Q with SS / PBCH block index or CSI-RS resource configuration d For example, the set Q d It may include 4 SS / PBCH block indexes and 8 CSI-RS resource configurations, and the set Q p 2 out of 4 SS / PBCH block indices and 2 out of 8 CSI-RS resource configurations may be included.

[0161] Based on the PUCCH resource indicator field value in the DCI format, possibly supplemented by an implicit approach as described above, the UE can derive the PUCCH resources and obtain the settings of the spatial filter for PUCCH transmission as parameters of the PUCCH resources, and thus obtain the SS / PBCH block index corresponding to the path loss measurement or with the CSI-RS resource configuration, and then the UE applies the path loss measurement to determine the PUCCH transmission power, for example as in Equation 5.

[0162] To mitigate the impact of potential error cases from implicit PUCCH resource determination, in addition to the explicit indication of the PUCCH resource subset by the PUCCH resource indication field, when applicable, the PUCCH spatial setting may be the same for all PUCCH resources in the subset of PUCCH resources indicated by the PUCCH resource indication field. Then, Q p It may have a size equal to the number of PUCCH resource subsets that may be indicated by the PUCCH resource indication field in the DCI format.

[0163] A mapping between a set of SRS resources and a set of SS / PBCH indices or CSI-RS resource configurations may also be provided to the UE by a higher layer to obtain a path loss estimate. When the DCI format for PDSCH reception scheduled to the UE includes an SRS Resource Indicator (SRI) field having a value indicating an SRS resource from a set of SRS resources, and the set Q of PUCCH space settings is p When the SRS resource is also included, the UE may determine the transmission power of the PUCCH for transmitting the HARQ-ACK in response to PDSCH reception using the path loss corresponding to the SS / PBCH block or CSI-RS resource configuration mapped to the SRS resource.

[0164] Fig.11 A flow chart of a method 1100 for determining, by a UE, PUCCH transmission power based on spatial configuration parameters of PUCCH resources according to an embodiment of the present disclosure is shown. Fig.11 The illustrated embodiment of method configuration 1100 is for illustration only and may have the same or similar configurations. Fig.11The scope of the present disclosure is not limited to any particular implementation.

[0165] At 1110, the UE detects a DCI format that schedules PUCCH reception and includes a PUCCH resource indication field. The DCI format may also include an SRI field. At 1120, the UE determines the PUCCH resource based on the PUCCH resource indicator field. The PUCCH resource determination may also be supplemented in an implicit manner. At 1130, the UE determines PUCCH space setting parameters for the PUCCH resource corresponding to the index of the SS / PBCH block or the CSI-RS resource configuration. At 1140, the UE determines the path loss measurement calculated by the UE using the SS / PBCH block or the CSI-RS.

[0166] At 1150, the UE transmits PUCCH using the power determined by the UE using path loss measurement. When the DCI format indicates an SRS resource mapped by higher layer signaling to an SS / PBCH block index or CSI-RS configuration used by the UE to measure path loss, the UE may determine the PUCCH transmission power using the corresponding path loss.

[0167] Since the same PUCCH format can be used for transmission of different UCI types (such as HARQ-ACK or CSI), and since different UCI types may have different reception reliability targets, the set of parameters used by the UE to determine the PUCCH transmission power of the same PUCCH format may be configured by the higher layer to the UE separately depending on the UCI type. O_PUCCH，f，c (q u ) can be configured separately for HARQ-ACK transmission and CSI transmission.

[0168] When a UE multiplexes both HARQ-ACK and CSI in the same PUCCH, the UE may use the configured P O_PUCCH，f，c (q u ) values ​​to achieve higher corresponding reception reliability for the UCI type. The other values ​​of the set of PUCCH parameters may be the same or may be configured separately.

[0169] The fourth embodiment of the present disclosure considers UE behavior in case of time-overlapped PUCCH transmission or overlapped PUCCH and PUSCH transmission on the UL BWP of the serving cell, and determination of conditions for defining the UE behavior.

[0170] Partially overlapping PUCCH transmissions typically occur for various combinations of UCI types. In practice, and for slot-based PUCCH transmissions, the gNB scheduler may not configure a UE with partially overlapping periodic PUCCH transmissions, especially if the UE may drop one of them due to the partial overlap. Only aperiodic PUCCH transmissions may be used for HARQ-ACK. The slot and first symbol used for the PUCCH transmission is indicated by the DCI format that triggers the HARQ-ACK transmission, and for PUCCH transmissions that span at least 4 symbols in a slot, the UE typically knows the slot of the HARQ-ACK transmission at least from the previous slot.

[0171] If the UE configures PUCCH transmission for CSI and PUCCH transmission for HARQ-ACK in the same time slot and the first symbol of the previous PUCCH transmission is the same as or after the first symbol of the next PUCCH transmission, the UE can multiplex CSI in the next PUCCH transmission. If the first symbol of the previous PUCCH transmission is before the first symbol of the next PUCCH transmission, if there is enough time for the UE to cancel (not yet performed) the previous PUCCH transmission, the CSI can be multiplexed again in the next PUCCH transmission.

[0172] In the first approach, a specific UE capability may be defined for the number of time slot symbols required for a UE to cancel a PUCCH transmission, which may be configured by higher layers, such as periodic or semi-persistent HARQ-ACK, SR or CSI transmissions in PUCCH, or indicated by a DCI format, such as HARQ-ACK transmissions indicated by a DCI format in PUCCH. In the second approach, the UE capability of N2 symbols for PUSCH preparation may be considered as a loose bound on the time required for a UE to cancel a transmission.

[0173] If the time between the reception by the UE of a PDSCH scheduled by a DCI format that triggers a HARQ-ACK transmission in a later PUCCH and the first symbol of the previous PUCCH is greater than N2 symbols, the UE may cancel the previous PUCCH transmission and multiplex the CSI in the later PUCCH transmission. Otherwise, the UE may not be assumed to be able to cancel the earlier PUCCH transmission and the UE may discard the later PUCCH transmission. Furthermore, the UE may consider this as an error case because the gNB may not be expected to trigger a PUCCH transmission for HARQ-ACK in a slot where the UE may discard the corresponding PUCCH transmission.

[0174] Fig.12An exemplary UE behavior 1200 for multiplexing UCI from time-overlapping PUCCH transmissions in one of the PUCCH transmissions is shown according to an embodiment of the present disclosure. Fig.12 The illustrated embodiment of UE behavior 1200 is for illustration only and may have the same or similar configurations. Fig.12 The scope of the present disclosure is not limited to any particular implementation.

[0175] When the UE is configured with a CSI transmission in the first PUCCH 1205 in the same time slot 1220, which starts later than the HARQ-ACK transmission in the second PUCCH 1210 (which can be assumed to be indicated by the DCI format), the UE multiplexes the CSI and HARQ-ACK in the second PUCCH transmission 1230 and discards the transmission of the first PUCCH. When the UE is configured with a CSI transmission in the third PUCCH 1240 in the same time slot 1220, which starts earlier than the HARQ-ACK transmission in the fourth PUCCH 1245 (which can be assumed to be indicated by the DCI format), two cases are considered.

[0176] In the first case (Case A), the time between the time when the UE receives / detects the DCI format indicating the fourth PUCCH transmission and the time when the UE is configured to start the third PUCCH transmission is greater than or equal to the time required for the UE to cancel the third PUCCH transmission, such as greater than or equal to N2 time slot symbols. For this case (Case A), the UE discards the third PUCCH transmission and multiplexes CSI and HARQ-ACK in the fourth PUCCH transmission 1250. In the second case (Case B), the time between the time when the UE receives / detects the DCI format indicating the fourth PUCCH transmission and the time when the UE is configured to start the third PUCCH transmission is less than the time required for the UE to cancel the third PUCCH transmission, such as less than N2 time slot symbols. For this case (Case B), the UE discards the fourth PUCCH transmission and only sends CSI in the third PUCCH transmission 1260. It is also possible for the UE to consider this case to be an erroneous case, such as one or more DCI format detections indicating the fourth PUCCH transmission.

[0177] HARQ-ACK and SR multiplexing in PUCCH may depend on when a positive SR request is provided from higher layers to the physical layer at the UE. However, HARQ-ACK and SR multiplexing may still be supported without considering the first slot symbol of the corresponding PUCCH transmission. If a positive SR request from the physical layer is not provided from higher layers to the physical layer early enough, the UE may send a negative SR to enable the UE to multiplex a positive SR (setting the corresponding value of one or more SR bits) with HARQ-ACK in a PUCCH transmission when the PUCCH transmission for HARQ-ACK starts before the PUCCH transmission for SR. The UE may send a positive SR at the next SR transmission opportunity in the PUCCH.

[0178] Therefore, for slot-based PUCCH transmissions (i.e., excluding PUCCH transmissions for SRs with a periodicity less than one slot), the UE may support or not support HARQ-ACK and CSI or SR multiplexing in the PUCCH without considering the first slot symbol of the corresponding PUCCH, which has potential error conditions as described above.

[0179] For non-slot (sub-slot) based PUCCH transmissions, such as for SR with a transmission period less than one slot, one possibility is that the UE discards the ongoing PUCCH (or possibly PUSCH) transmission in order to send the PUCCH conveying the SR. However, a minimum time for canceling an ongoing transmission is required (such as a time equal to the PUSCH preparation time or a time indicated by the UE capability for canceling an ongoing transmission). This minimum time is greater than a few slot symbols (e.g., for 15KHz subcarrier spacing, the minimum value of N2 is 10 symbols).

[0180] However, it is not a problem for the UE not to send a SR when the UE has an ongoing PUCCH or PUSCH transmission, because the additional delay incurred for the positive SR transmission is not expected to have a substantial impact on the overall scheduling delay. For example, the average additional delay incurred for the UE's inability to send a positive SR with a sub-slot periodicity is at most half a slot, and is further conditioned on the UE having an ongoing PUCCH transmission (or PUSCH transmission) in that slot. Even if the UE has a larger probability of 50% to send a PUCCH or PUSCH with HARQ-ACK in a slot, the additional delay incurred is at most 0.25 slots or less, which has a marginal impact on the end-to-end delay (even for 0.5 ms slots).

[0181] For PUCCH transmissions conveying HARQ-ACK with repetitions over multiple slots and with a higher priority for HARQ-ACK over data, the UE may not consider UL grants that result in PUSCH transmissions in the slots in which the UE repeats the PUCCH transmission (this is a possible reason for erroneous CRC checks, since the gNB scheduler will have no reason to schedule PUSCH since the UE dropped the PUSCH transmission). Furthermore, the UE may not multiplex other UCI in the repetitions of the PUCCH transmission conveying HARQ-ACK, since this may reduce reception reliability (and is semi-statically configured). In addition, the UE may ignore DL allocations indicating corresponding HARQ-ACK transmissions in time slots in which the UE is sending repetitions (except the first one) of the PUCCH transmissions for transmitting HARQ-ACK.

[0182] Two issues associated with 5G features may not allow direct reuse of LTE functionality: the possibility of partial overlap with PUSCH or other PUCCH transmissions where the PUSCH or other PUCCH is earlier; and the presence of overlapping (grant-free) PUSCH transmissions that require low latency, or the presence of positive SR transmissions associated with low latency services.

[0183] For the first issue, the UE may cancel the overlapping PUCCH transmission or another PUCCH transmission. The case where a PUSCH or another PUCCH starts before the first repetition of a PUCCH transmission with HARQ-ACK and the UE cannot cancel the corresponding transmission may be considered an error (since there is no need to expect the gNB to indicate the timeslot in which the UE cannot send the first PUCCH repetition).

[0184] The second question is of no particular practical significance, since a (coverage-limited) UE that requires PUCCH repetitions may require more PUCCH repetitions or repetitions of information types that require higher reception reliability. Furthermore, as mentioned before, a UE cannot immediately cancel an ongoing transmission. Therefore, the operation of the UE and gNB does not need to be affected by dropped PUCCH repetitions, and the gNB does not need to perform blind detection of whether PUSCH or PUCCH was received in a timeslot, since this is also difficult to reliably determine for coverage-limited UEs.

[0185] Support for dynamic PUSCH and PUCCH (with HARQ-ACK) transmission timing can lead to several possible combinations of PUSCH and PUCCH transmission overlaps in order to multiplex UCI in PUSCH transmissions instead of PUCCH transmissions. Overlaps generally require different treatments depending on when PUSCH or PUCCH transmissions are triggered. For simplicity, it is assumed below that PUCCH is transmitted without duplication.

[0186] If the UE does not detect a DCI format that triggers a PUCCH transmission after scheduling a PUSCH transmission DCI format in the same timeslot, the UE is aware of the possible overlap when preparing the PUSCH (the UE has a minimum PUSCH preparation time available to cancel the PUCCH transmission). Therefore, the UE can multiplex HARQ-ACK in PUSCH and drop PUCCH regardless of the PUCCH / PUSCH overlap type (same / different first symbols). If the UE has multiple PUSCH transmissions in multiple UL BWPs or in multiple serving cells, the same rules can be applied and the UE can multiplex HARQ-ACK in PUSCH.

[0187] If the UE detects a DCI format that triggers a PUCCH transmission after a DCI format that schedules a PUSCH transmission in the same timeslot, there may be HARQ-ACK information that the UE cannot multiplex in the PUSCH (e.g., due to the receipt of PDSCH after the PUSCH was triggered). In addition, if the UE has to multiplex HARQ-ACK in the PUSCH, the UE PUSCH processing timeline will be reduced. The UE can then send the earlier channel.

[0188] Therefore, if the UE does not detect the DCI format that triggered the PUCCH transmission after scheduling a PUSCH transmission DCI format in the same time slot, the UE multiplexes HARQ-ACK in the PUSCH (and discards the PUCCH). If the UE does not detect the DCI format that triggered the PUCCH transmission after scheduling a PUSCH transmission DCI format in the same time slot, the UE discards the subsequent transmission.

[0189] For overlap between periodic PUCCH and dynamic PUCCH transmissions with different first symbols and where the periodic PUCCH transmission occurs no earlier than the PUCCH transmission, the UE drops the PUCCH.

[0190] For overlap between periodic (RRC configured) PUCCH and dynamic (scheduled by DCI format) PUSCH transmissions with different first symbols and where the periodic PUCCH transmission occurs earlier than the PUSCH transmission, if the time between the time the UE receives / detects the DCI format scheduling the PUSCH transmission and the start time of the PUCCH transmission (first symbol of the PUCCH transmission) is equal to or greater than the PUCCH cancellation time (which may be indicated by the UE to the gNB or assumed to be the same as the PUSCH preparation time), the UE discards the PUCCH transmission and multiplexes the corresponding UCI to the PUSCH. The UE may then cancel the PUCCH transmission. Additionally, the UE may consider as an error case the case where the time between the PDSCH reception associated with the transmission of HARQ-ACK information in the PUCCH and the start of the PUCCH transmission overlapping with the PUCCH transmission is less than the PUCCH cancellation time, as the gNB may be expected to schedule PUSCH transmissions that the UE may discard. The same rules apply when the UE has multiple simultaneous PUSCH transmissions.

[0191] Fig.13 An exemplary UE behavior 1300 is shown for multiplexing UCI from time-overlapping PUCCH and PUSCH transmissions in a PUCCH transmission according to an embodiment of the present disclosure. Fig.13 The illustrated embodiment of UE behavior 1300 is for illustration only and may have the same or similar configurations. Fig.13 The scope of the present disclosure is not limited to any particular implementation.

[0192] Consider a periodic PUCCH transmission, but the same principle applies to a PUCCH transmission triggered by a DCI format, as discussed subsequently. When the UE is configured to start a PUCCH transmission 1305 earlier than an overlapping PUSCH transmission scheduled to the UE by a DCI format 1310 in the same time slot 1320, when the time between the time of the DCI format scheduling the PUSCH transmission and the start time of the PUCCH transmission (the first symbol of the PUCCH transmission) 1340 is equal to or greater than the PUCCH cancellation time 1350, the UE multiplexes the UCI of the periodic PUCCH transmission, such as CSI, in the PUSCH 1330.

[0193] Otherwise, when the time between the time when the UE receives / detects the DCI format scheduling PUSCH transmission and the start time 1360 of PUCCH transmission is less than the PUCCH cancellation time 1370 , the UE drops the PUSCH transmission and transmits UCI in PUCCH 1380 .

[0194] For a PUCCH transmission from a UE that is triggered by a DL DCI format that conveys HARQ-ACK information and that schedules a corresponding PUCCH reception to the UE, the UE multiplexes HARQ-ACK in a PUSCH transmission that overlaps in time with the PUCCH transmission when the time between the time the UE receives the PDSCH and the time the PUSCH transmission starts is greater than or equal to the PUSCH preparation time. In order to provide additional time margin to the UE, another option is to multiplex HARQ-ACK in a PUSCH transmission that overlaps in time with the PUCCH transmission when the time between the time the UE completes the corresponding reception of a transport block in a PDSCH scheduled by the DCI format and the time the PUSCH transmission starts is greater than or equal to the PUSCH preparation time.

[0195] The fifth embodiment of the present disclosure considers power adjustment of PUCCH transmission for a small UCI payload, and determines the number of repetitions of PUCCH transmission based on the number of UCI bits included in the PUCCH.

[0196] Through higher layer signaling, the gNB may provide the UE with a reference number of repetitions of PUCCH transmission. The reference number of repetitions may correspond to a reference UCI payload (the number of UCI information bits, including CRC bits if any). The reference UCI payload may be predetermined in system operation, such as 1 UCI bit, or 2 UCI bits, or 4 UCI bits, or may also be provided by higher layer signaling. For each UCI type of CSI (such as HARQ-ACK, SR), the number of repetitions may be provided to the UE separately, and the UE determines the number of repetitions of PUCCH transmission based on the type of UCI bits included in the PUCCH transmission.

[0197] As described in Equation 5, a UE configured with repetition of PUCCH transmission may maintain the same PUCCH transmission power instead of adjusting the PUCCH transmission power based on the UCI payload in the PUCCH when possible. Configuration for repetition of PUCCH transmission may also include a single transmission (without repetition) of a reference UCI payload (and a UCI payload smaller than the reference UCI payload). When a configuration for PUCCH transmission with repetition is provided to the UE by a higher layer, the UE may apply one or more repetitions to a UCI payload larger than the reference UCI payload even when the UE is indicated by a higher layer that there is no repetition for PUCCH transmission with a reference UCI payload.

[0198] For PUCCH format 1, the power control formula in Equation 5 can be adjusted to include an additional 10log 10 O UCI dB term, depending on whether it is OUCI =1 bit or 0 UCI = 2 bits to adjust the UCI (HARQ-ACK / SR) payload. For example, at PUCCH transmission opportunity i, Can be modified to

[0199] Number of PUCCH repetitions for configuration corresponding to 1-bit UCI reference payload When 2<O UCI ≤11, the UE may not be able to increase the PUCCH transmission power by Δ TF，b，f，c (i) = 10log 10 (K 1 ·O UCI / N RF ), for example, because the UE transmission power is close to the maximum transmission. Instead, the UE increases the number of repetitions of PUCCH transmission. UCI = 2 UCI bits for PUCCH transmission, UE can apply Repeat for 2 <O UCI For PUCCH transmissions with ≤11 UCI bits, the UE can apply e.g. Repeat or The UCI payload may correspond to a single UCI type, such as n HARQ-ACK HARQ-ACK information bits, or corresponding to multiple UCI types, such as 0 SR +O CSU information bits.

[0200] The UCI payload that can be supported by a PUCCH transmission with repetition may be limited to, for example, a maximum of 0. UCI = 11 bits, because the power is close to the maximum power P CMAX，f，c The UE that sends PUCCH in the transmission opportunity i of (i) usually has limited coverage and does not need to provide a large number of HARQ-ACK information bits or detailed CSI reports. UCI >11 bits of PUCCH transmission repetition, the number of repetitions may be determined as, for example Among them, K 2 =2.4, and BPRE=(O ACK +O SR +O CSI +O CRC ) / N RE .

[0201] Fig.14A flowchart 1400 is shown of a method for determining a repetition number for a PUCCH transmission including a UCI payload based on a repetition number provided by a higher layer for a reference UCI payload according to an embodiment of the present disclosure. Fig.14 The illustrated embodiment of method configuration 1400 is for illustration only and may have the same or similar configurations. Fig.14 The scope of the present disclosure is not limited to any particular implementation.

[0202] At 1410, the higher layer provides the UE with the number of repetitions for PUCCH transmission. It can also be provided by the higher layer to the UE for The reference UCI payload may be repeated times, or the reference UCI payload may be predetermined, such as 1 bit. At 1420, the UE has 0 UCI ≤ 11 UCI bits are sent in PUCCH at transmission opportunity i. In transmission opportunity i, the UCI bits correspond to n HARQ-ACK HARQ-ACK information bits, or CSI CSI bits, or SR +O CSI SR and CSI bits, etc.

[0203] At 1430, when n HARQ-ACK =1(or when O SR =1, if the UE sends an SR for a single SR configuration), the UE sends an SR with PUCCH repeated times; or when n HARQ-ACK =2(or when O SR =2, if the UE sends an SR for one of the four possible configurations), the UE sends a PUCCH repeated times; or when n HARQ-ACK >2, or when UCI is CSI, or when the UE sends an SR for one of more than four possible configurations, the UE sends a PUCCH repeated times.

[0204] Number of repetitions of PUCCH transmission It can also be compared to UCI bits instead of 1 UCI bit ( It can be expressed as ). The reference payload of UCI bits can be predetermined in system operation, such as bits or bits, or provided to the UE via high-level signaling. Then, when O UCI Less than or greater than With O UCI The number of repetitions of a PUCCH transmission with a payload of UCI bits can be less than or greater than

[0205] For example, if And O UCI =1 or O UCI =2, by adjusting each Δ TF，b，f，c (i) The number of repetitions of PUCCH transmission is determined by the difference between the components For example, if And O UCI >2, by adjusting each component Δ TF，b，f，c The number of repetitions of PUCCH transmission is determined by the difference between For simplicity, Applicable to all UCI payloads up to 11 bits.

[0206] Instead of according to O UCI UCI bits (including CRC CRC bits, when O UCI > 11) to adjust the number of repetitions, and the UE can adjust the PUCCH transmission power. This method assumes that the number of repetitions of PUCCH transmission is is relative to the reference UCI payload Configured for the UE. For example, when UE can use Repeat the PUCCH to send the PUCCH, while reducing the power dB. The UE can determine that the number of repetitions is greater than For example Fig.14 Described in .

[0207] The value of can be provided to the UE by the gNB using higher layer signaling, or can be predetermined in system operation. For example, The value of may be the same as the maximum UCI payload, where the UE may repeatedly send the associated PUCCH. For the transmission of one or two HARQ-ACK information bits, the UE may Bit time, through to reduce the transmission power; or when When, through To reduce the transmission power. 2<O UCI ≤11 bits of transmission, UE can To adjust the PUCCH transmission power (while using times).

[0208] In addition to adjusting the number of repetitions of a PUCCH transmission or the power of a PUCCH transmission with repetitions depending on the UCI payload, the number of repetitions of a PUCCH transmission or the power of a PUCCH transmission with repetitions may also be adjusted based on the number of symbols of a time slot available for each repetition of the PUCCH transmission. For a PUCCH including HARQ-ACK information, the initial (first) symbol in a time slot and the duration of each repetition of the PUCCH transmission are indicated by the DCI format associated with the HARQ-ACK information.

[0209] Since the duration of each repetition of the PUCCH transmission may depend on the corresponding PUCCH resource, which may vary depending on the corresponding indication by the DCI format, the required number of repetitions of the PUCCH transmission or the power of each repetition may also vary. When the PUCCH is repeated, the UE can also be provided with The number of reference symbols in the time slot corresponding to the repetition When the duration of the repetition of the PUCCH transmission in a slot is less than The UE may increase the PUCCH transmission power when the duration of the repetition of the PUCCH transmission in the slot is greater than When , the UE can reduce the PUCCH transmission power.

[0210] Optionally, when the duration of the repetition of the PUCCH transmission in the slot is less than , the UE may increase the number of repetitions when the repetition duration of the PUCCH transmission in the slot is greater than , the UE can reduce the number of repetitions of PUCCH transmission.

[0211] Power adjustment (positive, negative or zero) is dB. For example, when (Minimum number of symbols repeated for PUCCH transmission in a time slot) and PUCCH transmission repetition exceeds When dB. For example, when (maximum number of symbols used for PUCCH transmission repetition in a slot) and the number of PUCCH transmission repetitions exceeding When dB.

[0212] Without power regulation, when For the generated The number of repetitions can be calculated by factoring to adjust the number of repetitions; or when (You can use the "floor" function instead of the "ceiling" function as an alternative) for the generated The number of repetitions can be calculated by factoring To adjust the number of repetitions.

[0213] The sixth embodiment of the present disclosure considers dynamic determination of the number of repetitions of PUCCH transmission.

[0214] Dynamically determining the number of repetitions of PUCCH transmission is beneficial when the channel medium conditions or the transmit / receive conditions of PUCCH transmission change dynamically, and the UE needs to increase the PUCCH transmission power, potentially above the maximum allowed transmit power, when conditions deteriorate, or reduce the PUCCH transmission power when conditions improve. For example, such conditions may include dynamic changes in shadowing, or dynamic changes in transmit / receive beams that provide a sufficiently large SINR, or addition / removal of reception points, etc. In this case, it is beneficial to enable the network to dynamically change the number of repetitions of PUCCH transmission even for the same UCI payload.

[0215] For example, when the PUCCH includes HARQ-ACK information, a dynamic indication of the number of repetitions of the PUCCH transmission is provided by a DCI format associated with the PUCCH transmission. The indication of the number of repetitions of the PUCCH transmission may be explicit by including a corresponding field in the DCI format, or implicit based on the value of another field in the DCI format.

[0216] In a first approach, an implicit indication may be provided by associating a transmission configuration indicator (TCI) state with a PUCCH repetition number, the transmission configuration indicator (TCI) state being indicated by a DCI format and associated with quasi-configuration information for the UE to determine the spatial filter applied to the PUCCH transmission. For example, a first TCI state may be associated with a first repetition number of a PUCCH transmission by a higher layer, and a second TCI state may be associated with a second repetition number of a PUCCH transmission by a higher layer. The DCI format may indicate the TCI state of the PUCCH transmission, and the UE may determine the repetition number of the PUCCH transmission based on the association / mapping between the TCI states provided by the higher layer and the repetition number of the PUCCH transmission. The DCI format may indicate the TCI state regardless of whether the associated PUCCH transmission is configured with repetitions.

[0217] The mapping of the TCI state to the number of repetitions of the PUCCH transmission may be configured separately for each PUCCH format, or may be common to all PUCCH formats. The determination of the number of repetitions of the PUCCH transmission may also be combined with the fifth embodiment of the present disclosure, where the association between the TCI state and the number of repetitions of the PUCCH transmission may be for a reference UCI payload (which may also be provided by a higher layer or may be predetermined in system operation), and the UE may adjust the number of repetitions of the PUCCH transmission based on the UCI payload included in the PUCCH transmission.

[0218] When the DCI format does not include a field indicating a TCI state from a set of configured TCI states, a TCI state with an index of zero from the set of configured TCI states or a TCI state in the last DCI format including a field indicating the TCI state detected by the UE may be used to determine the number of PUCCH repetitions. The first method may also be applied when the UE is not configured with repetitions for PUCCH transmissions, and in this case, the TCI state may be a value associated with a value from a set of configured values, for PUCCH O_PUCCH，b，f，c (q u ) or Δ F_PUCCH (F).

[0219] In a second method, an implicit indication may be provided by associating a PUCCH resource indicated by a DCI format with a PUCCH repetition number. For example, a first PUCCH resource may be associated with a first repetition number of a PUCCH transmission (such as a single transmission in a time slot) by a higher layer, and a second PUCCH resource may be associated with a second repetition number of a PUCCH transmission (such as two transmissions in the same symbol on two corresponding time slots) by a higher layer.

[0220] The DCI format may indicate resources used for PUCCH transmission, and the UE may determine the number of repetitions for PUCCH transmission based on an association between the PUCCH resource and the number of repetitions for PUCCH transmission provided by a higher layer, or by including the number of repetitions as part of the configuration of parameters associated with the PUCCH resource. This may be combined with the fifth embodiment of the present disclosure, wherein the association between the PUCCH resource and the number of repetitions for PUCCH transmission may be for a reference UCI payload (which may also be provided by a higher layer or may be predetermined in system operation), and the UE may adjust the number of repetitions for PUCCH transmission based on the UCI payload included in the PUCCH transmission. The second method may also be applied when the UE is not configured with repetitions for PUCCH transmission, and in this case, the PUCCH resource may be a value associated with a set of configured values, for PUCCH. O_PUCCH，b，f，c (qu ) or Δ F_PUCCH (F).

[0221] In a third method, an implicit indication may be provided by associating a TPC command value indicated by a DCI format with a PUCCH repetition number. For example, a predetermined TPC command value may be associated with a PUCCH transmission repetition number provided by a higher layer. This may be combined with the fifth embodiment of the present disclosure, in which the association between the TCP command value and the PUCCH transmission repetition number may be for a reference UCI payload (which may also be provided by a higher layer or may be predetermined in system operation), and the UE may adjust the PUCCH transmission repetition number based on the UCI payload included in the PUCCH transmission.

[0222] Fig.15 A flowchart 1500 of a method for determining the number of repetitions of PUCCH transmission based on a TCI state indicated in a DCI format triggering PUCCH transmission according to an embodiment of the present disclosure is shown. Fig.15 The illustrated embodiment of method configuration 1500 is for illustration only and may have the same or similar configurations. Fig.15 The scope of the present disclosure is not limited to any particular implementation.

[0223] At 1510, a set of TCI states and a set of repetition numbers for PUCCH transmissions are provided to a UE by a higher layer. Each element of the set of repetition numbers for PUCCH transmissions is mapped to an element of the set of TCI states, for example, by a one-to-one mapping or a many-to-one mapping. At 1520, the UE detects a DCI format that triggers a PUCCH transmission and includes a field indicating the TCI state of the PUCCH transmission. At 1530, based on the mapping of the indicated TCI state to an element from the set of repetition numbers for PUCCH transmissions, the UE determines a repetition number for the PUCCH transmission for the corresponding UCI payload. At 1540, the UE sends the PUCCH using the determined repetition number.

[0224] In a fourth method, the number of repetitions of the PUCCH transmission including the HARQ-ACK information may be determined based on the DCI format associated with the HARQ-ACK information. For example, when the corresponding HARQ-ACK information is associated with the first DCI format, the UE may send the PUCCH with a first number of repetitions, and when the corresponding HARQ_ACK information is associated with the second DCI format, the UE may send the PUCCH with a second number of repetitions. The first DCI format and the second DCI format may be distinguished by respective first and second RNTIs for scrambling respective CRC bits, by respective first and second DCI format sizes, or by a field in each DCI format indicating whether the DCI format is a first DCI format or a second DCI format.

[0225] The seventh embodiment of the present disclosure considers determining PUCCH transmission power or the number of repetitions of PUCCH transmission depending on the UCI type.

[0226] The higher layer can be the value of the open loop power control parameter (such as P O_PUCCH，b，f，c (q u ) or Δ F_PUCCH (F)) provides a separate configuration for each UCI type for the same PUCCH format. Optionally, the formula for determining the PUCCH transmission power in Equation 5 may include an additional term Δ UCI-type , which is provided by higher layers for UCI type (HARQ-ACK information, SR, or CSI) and may be common to all applicable PUCCH formats (such as PUCCH format 3 or PUCCH format 4), or may be provided separately for each PUCCH format. F_PUCCH (F) can be replaced by Δ UCI-type , and Equation 5 can be replaced by Equation 6.

[0227] It is also possible that a Δ UCI-type , such as for example for HARQ-ACK, and in this case a default value such as 0 is used. Δ UCI-type Values ​​can be positive or negative.

[0228] [dBm] Equation 6

[0229] For separate configuration of one or more open-loop parameters for each UCI type, the PUCCH transmit power can be independent between UCI types. For example, for the same payload, when the PUCCH includes HARQ-ACK information, the PUCCH transmit power can be different from when the PUCCH includes CSI. The closed-loop power control parameters can be common for different UCI types, as a typical purpose of closed-loop power control is to track changes in the channel medium. Similarly, higher layers can provide separate configuration for each UCI type for the number of PUCCH repetitions. For example, when the UE sends PUCCH using PUCCH format 3 and for a given UCI payload, the UE can be configured by higher layers to send CSI using 2 repetitions and HARQ-ACK using 4 repetitions.

[0230] When different UCI types are multiplexed in the same PUCCH, the UE may be configured by a higher layer with the value of an open-loop power control parameter or the number of PUCCH repetitions for PUCCH transmission. It is also possible that, in the absence of higher layer signaling, the UE determines those values ​​by a predetermined rule. For example, when the UE multiplexes HARQ-ACK information and SR or CSI in the same PUCCH, the UE may use the value configured for the transmission of HARQ-ACK information in the PUCCH. For example, when the UE multiplexes different corresponding UCI types in PUCCH transmission, the UE may use a larger P value. O_PUCCH，b，f，c (q u ) value, or a larger Δ F_PUCCH (F) value, or a larger Δ UCI-type value.

[0231] Fig.16 A flow chart of a method 1600 for determining PUCCH transmission power based on a UCI type included in a PUCCH transmission according to an embodiment of the present disclosure is shown. Fig.16 The illustrated embodiment of method configuration 1400 is for illustration only and may have the same or similar configurations. Fig.16 The scope of the present disclosure is not limited to any particular implementation.

[0232] At 1610, a power offset value Δ for PUCCH transmission including HARQ-ACK information is provided by a higher layer to the UE. HARQ-ACK , or the power offset value Δ for PUCCH transmission including SR SR , or the power offset value Δ for PUCCH transmission including CSI CSI At 1620, the UE determines whether a single UCI type is included in the PUCCH. At 1630, when a single UCI type is included in the PUCCH, the UE uses ΔHARQ-ACK The power offset value determines the PUCCH transmission power; or when the PUCCH includes only SR, the UE uses the power offset value Δ SR To determine the PUCCH transmission power, or when the PUCCH includes only CSI, the UE uses the power offset value Δ CSI At 1640, when multiple UCI types are included in the PUCCH, the UE uses the corresponding Δ UCI-type The larger value of the value.

[0233] The eighth embodiment of the present disclosure considers determining the number of time slots used for PUCCH transmission so that the UE avoids discarding UCI or sending UCI at a coding rate less than or equal to a coding rate provided by a higher layer to the UE.

[0234] The UE may be configured by higher layers to spread a PUCCH transmission with the first and last symbols in the indicated slots over multiple slots, subject to the constraint that the resulting code rate is less than or equal to the code rate r provided by higher layers to the UE. Unlike the repetition of PUCCH transmissions where the coding of the UCI bits takes into account rate matching on the available REs in one slot and is repeated over multiple slots, for PUCCH transmissions spread over multiple slots, the coding of the UCI bits takes into account rate matching on the available REs in multiple slots. The UE may also be provided by higher layers with a maximum number of slots. Used to extend PUCCH transmission. In all time slots of PUCCH transmission, the number of RBs for PUCCH transmission is the same.

[0235] UE determines the minimum number of time slots That is, less than or equal to the number of time slots provided by the upper layer And the code rate that causes the UCI (including CRC, if any) in the PUCCH to be transmitted is less than or equal to the code rate r provided by the higher layer to the UE. represents the number of RBs used for PUCCH transmission (which may be the maximum number of RBs that can be used for PUCCH transmission), represents the number of subcarriers per RB (RE) that can be used for UCI transmission in PUCCH, represented by represents the number of symbols in a time slot that can be used for UCI transmission in PUCCH, and Q m It represents the number of modulation symbols (modulation order) available for each RE. and Among them, O UCI is the number of UCI bits including CRC bits (if any). PUCCH is sent on.

[0236] when When the code rate of UCI transmission on the time slot is greater than r, that is, when When the UE first discards UCI, such as the CSI report or the second part of the CSI report (if applicable), and even when the resulting code rate is greater than r, When the UE has discarded all CSI reports, or has discarded all CSI part 2 reports, and the resulting code rate remains greater than r, that is, when When UE is used, the UE may also be configured by higher layers to apply HARQ-ACK bundling in space, time or a small area.

[0237] Fig.17 A flowchart of a method 1700 for determining the number of time slots for PUCCH transmission based on a code rate and a number of time slots provided by a higher layer according to an embodiment of the present disclosure is shown. Fig.17 The illustrated embodiment of method configuration 1700 is for illustration only and may have the same or similar configurations. Fig.17 The scope of the present disclosure is not limited to any particular implementation.

[0238] At 1710, the code rate r and the (maximum) number of time slots for UCI transmission in PUCCH are provided to the UE by the higher layers. At 1720, the UE determines the minimum number of minislots for PUCCH transmission. The minimum number of time slots results in a UCI code rate less than or equal to r or At 1730, UE The UCI is encoded on multiple subcarriers and symbols available for UCI transmission in a time slot and PUCCH is sent on each time slot.

[0239] The eighth embodiment can also be applied in a similar manner to determine the number of symbols in a time slot, instead of determining the number of time slots for PUCCH transmission based on a UCI code rate obtained that is less than or equal to the code rate provided by the upper layer, to reach the maximum number of time slots provided by the upper layer. Only the first symbol and the maximum number of symbols for PUCCH transmission in the time slot can be provided to the UE, and the UE can adaptively determine the number of symbols for PUCCH transmission in the time slot based on the UCI code rate obtained that is less than or equal to the code rate provided by the upper layer.

[0240] In order to achieve different reception reliability targets for different UCI types, the code rate r provided by the upper layer to the UE may also be provided independently for each UCI type. For example, the upper layer may provide the UE with a first code rate r for HARQ-ACK transmission and a second code rate r for CSI transmission, respectively.

[0241] The code rate r provided by the upper layer to the UE may also be provided independently according to the service type. For example, the upper layer may provide the UE with a first code rate r for HARQ-ACK transmission corresponding to a first service type (such as mobile broadband). 1 and a second code rate r corresponding to HARQ-ACK transmission for a second service type (such as ultra-reliable low-delay communication) 2 . For example, based on an indication of the DCI format that schedules PDSCH reception associated with HARQ-ACK transmission (such as the value of a field in the DCI format, the RNTI used to scramble the CRC of the DCI format, the size of the DCI format, etc.), the UE can determine the code rate to be applied. When different UCI types are jointly multiplexed (coded) in the same PUCCH, the smaller of the corresponding coding rates can be used to determine the number of resources (such as the number of RBs, the number of symbols of a time slot, or the number of time slots), or when the smaller of the coding rates is not met when sending all UCI, it is used to determine the UCI discard requirement.

[0242] Although the present disclosure has been described using exemplary embodiments, various changes and modifications may occur to those skilled in the art. It is intended that the present disclosure encompass changes and modifications that fall within the scope of the appended claims.

[0243] Nothing in this application should be construed as implying that any particular element, step, or function is an essential element that must be included in the scope of the claims. The scope of the patented subject matter is limited solely by the claims. Furthermore, no claim is intended to invoke 35 U.S.C. §112(f) unless the exact word "means" is followed by a participle.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising: Receive a physical downlink shared channel PDSCH, where: The PDSCH is scheduled by the first downlink control information DCI format; Identify that a physical uplink control channel PUCCH for hybrid automatic repeat request acknowledgement HARQ-ACK information for PDSCH will overlap with a first physical uplink shared channel PUSCH in time; Based on identifying that the first PUSCH satisfies the time condition, multiplexing the HARQ-ACK information of the PDSCH in the first PUSCH; and Send the first PUSCH.

2. The method according to claim 1, wherein: The time condition is satisfied based on that the start time of transmission of the first PUSCH is at least a predetermined time after the end time of the PDSCH.

3. The method according to claim 1, wherein: The time condition is satisfied based on a PUSCH preparation time associated with the first PUSCH.

4. The method according to claim 1, wherein: PUCCH has no repetition.

5. The method according to claim 1, further comprising: identifying that the PUCCH will overlap in time with a second PUSCH, wherein the second PUSCH satisfies the time condition, Based on the fact that the first PUSCH is scheduled by the second DCI format and the second PUSCH is configured by higher layer signaling, it is determined to multiplex HARQ-ACK information of the PDSCH in the first PUSCH.

6. A method performed by a base station in a wireless communication system, the method comprising: Send a physical downlink shared channel PDSCH, where The PDSCH is scheduled by the first downlink control information DCI format; Identify that a physical uplink control channel PUCCH for hybrid automatic repeat request acknowledgement HARQ-ACK information for PDSCH will overlap with a first physical uplink shared channel PUSCH in time; A first PUSCH is received, wherein HARQ-ACK information of the PDSCH is multiplexed in the first PUSCH based on the first PUSCH satisfying a time condition.

7. The method according to claim 6, wherein: The time condition is satisfied based on that the start time of transmission of the first PUSCH is at least a predetermined time after the end time of the PDSCH.

8. The method according to claim 6, wherein: The time condition is satisfied based on a PUSCH preparation time associated with the first PUSCH.

9. The method according to claim 6, wherein: PUCCH has no repetition.

10. The method according to claim 6, further comprising: Identify that the PUCCH will overlap in time with the second PUSCH, where The second PUSCH meets the time condition, Wherein, based on the fact that the first PUSCH is scheduled by the second DCI format and the second PUSCH is configured by high-layer signaling, the HARQ-ACK information of the PDSCH is multiplexed in the first PUSCH.

11. A user equipment UE in a wireless communication system, the UE comprising: transceiver; and At least one processor configured to: Receive a physical downlink shared channel PDSCH, where: The PDSCH is scheduled by the first downlink control information DCI format; Identify that a physical uplink control channel PUCCH for hybrid automatic repeat request acknowledgement HARQ-ACK information for PDSCH will overlap with a first physical uplink shared channel PUSCH in time; Based on identifying that the first PUSCH satisfies the time condition, multiplexing the HARQ-ACK information of the PDSCH in the first PUSCH; and Send the first PUSCH.

12. The terminal according to claim 11, wherein: The time condition is satisfied based on that the start time of transmission of the first PUSCH is at least a predetermined time after the end time of the PDSCH.

13. The terminal according to claim 11, wherein: The time condition is satisfied based on a PUSCH preparation time associated with the first PUSCH.

14. The terminal according to claim 11, wherein: PUCCH has no repetition.

15. The terminal according to claim 11, wherein: The at least one processor is further configured to: identifying that the PUCCH will overlap in time with a second PUSCH, wherein the second PUSCH satisfies the time condition, Based on the fact that the first PUSCH is scheduled by the second DCI format and the second PUSCH is configured by higher layer signaling, it is determined to multiplex HARQ-ACK information of the PDSCH in the first PUSCH.

16. A base station in a wireless communication system, the base station comprising: transceiver; and At least one processor configured to: Send a physical downlink shared channel PDSCH, where The PDSCH is scheduled by the first downlink control information DCI format; Identify that a physical uplink control channel PUCCH for hybrid automatic repeat request acknowledgement HARQ-ACK information for PDSCH will overlap with a first physical uplink shared channel PUSCH in time; A first PUSCH is received, wherein HARQ-ACK information of the PDSCH is multiplexed in the first PUSCH based on the first PUSCH satisfying a time condition.

17. The base station according to claim 16, wherein: The time condition is satisfied based on that the start time of transmission of the first PUSCH is at least a predetermined time after the end time of the PDSCH.

18. The base station according to claim 16, wherein: The time condition is satisfied based on a PUSCH preparation time associated with the first PUSCH.

19. The base station according to claim 16, wherein: PUCCH has no repetition.

20. The base station of claim 16, the at least one processor further configured to identify that the PUCCH will overlap in time with a second PUSCH, wherein: The second PUSCH meets the time condition, and Wherein, based on the fact that the first PUSCH is scheduled by the second DCI format and the second PUSCH is configured by high-layer signaling, the HARQ-ACK information of the PDSCH is multiplexed in the first PUSCH.

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