Method and apparatus for beam management and coverage enhancement

Abstract

An apparatus and method for transmitting or receiving a signal or channel. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving information of a plurality of transmission configuration indication (TCI) states via radio resource control (RRC) signaling, the plurality of TCI states comprising a first TCI state and a second TCI state; identifying, based on the indication received from the base station, a first TCI state, a second TCI state, and one of both the first TCI state and the second TCI state; and receiving a first physical downlink shared channel (PDSCH) scheduled by a first downlink control information (DCI) format or a first PDSCH configured by RRC signaling and activated by the first DCI format by applying the identified first TCI state, the second TCI state, and one of the first TCI and the second TCI state.

Description

[0001] This case is a divisional application of the invention patent application with the application date of December 11, 2020, application number 202080086512.8, and invention name "Method and device for beam management and coverage enhancement for semi-persistent transmission and configured authorized transmission". Technical Field

[0002] The present disclosure relates generally to wireless communication systems, and more particularly to beam management and coverage enhancement for semi-persistent transmissions and configuration grant transmissions. Background Art

[0003] In order to meet the increased demand for wireless data services since the deployment of the fourth generation (4G) communication system, efforts have been made to develop improved fifth generation (5G) or pre-5G communication systems. 5G or pre-5G communication systems are also referred to as "super 4G networks" or "post-long term evolution (LTE) systems". 5G communication systems are considered to be implemented in higher frequency (millimeter wave) bands (e.g., 60 GHz bands) 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 with respect to 5G communication systems. In addition, in 5G communication systems, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference elimination, etc.

[0004] In 5G systems, hybrid frequency shift keying (FSK) and Fairchild quadrature amplitude modulation (FQAM) with sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0005] The Internet, as a human-centered connected network in which humans generate and consume information, is now developing towards the Internet of Things (IoT), in which distributed entities (such as things) exchange and process information without human intervention. The Internet of Everything (IoE) has emerged, which is a combination of IoT technology and big data processing technology through connection with cloud servers. Since technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology" are required for IoT implementation, sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied recently. Such an IoT environment can provide smart Internet technology services that create new value for human life by collecting and analyzing data generated between networked things. Through the integration and combination between existing information technology (IT) and various industrial applications, IoT can be applied to various fields including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0006] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, MTC, and M2M communications can be implemented through beamforming, MIMO, and array antennas. The application of cloud RAN, which is the above-mentioned big data processing technology, can also be considered as an example of the fusion between 5G technology and IoT technology.

[0007] As described above, according to the development of wireless communication systems, various services can be provided, and thus a method for easily providing such services is required. Summary of the invention

[0008] Technical Solution

[0009] An apparatus and method for sending or receiving a signal or channel. A method for operating a user equipment (UE) to receive a signal or channel includes: receiving a configuration for a spatial filter; determining a first spatial filter and a second spatial filter from the spatial filter; and determining a first number of repetitions and a second number of repetitions. The spatial filters correspond to spatial relationships with a reference signal (RS), respectively. The first spatial filter and the second spatial filter are different. The first number of repetitions and the second number of repetitions are different. The method also includes sending a signal or channel using the first spatial filter with a first number of repetitions and using the second spatial filter with a second number of repetitions. Sending the second number of repetitions after the first number of repetitions.

[0010] A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving information of multiple transmission configuration indication (TCI) states via radio resource control (RRC) signaling, the multiple TCI states including a first TCI state and a second TCI state; identifying a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state based on an indication received from a base station; and receiving a first physical downlink shared channel (PDSCH) scheduled by a first downlink control information (DCI) format, or a first PDSCH configured by RRC signaling and activated by a first DCI format, by applying the identified first TCI state, the second TCI state, and one of the first TCI state and the second TCI state.

[0011] A method performed by a base station in a wireless communication system, the method comprising: sending information of multiple transmission configuration indication TCI states via radio resource control (RRC) signaling, the multiple TCI states including a first TCI state and a second TCI state; and sending a first physical downlink shared channel (PDSCH) scheduled by a first downlink control information (DCI) format, or a first physical downlink shared channel (PDSCH) configured by RRC signaling and activated by a first DCI format to a user equipment (UE) by applying the first TCI state, the second TCI state, and one of the first TCI state and the second TCI state, wherein the first TCI state, the second TCI state, and one of the first TCI state and the second TCI state are identified based on an indication sent from the base station.

[0012] A user equipment (UE) in a wireless communication system, the UE comprising: a transceiver; and at least one processor coupled to the transceiver and configured to: receive information of multiple transmission configuration indications (TCI) states via radio resource control (RRC) signaling, the multiple TCI states comprising a first TCI state and a second TCI state, identify the first TCI state, the second TCI state, and one of the first TCI state and the second TCI state based on an indication received from a base station, and receive a first physical downlink shared channel (PDSCH) scheduled by a first downlink control information (DCI) format, or a first PDSCH configured by RRC signaling and activated by a first DCI format by applying the identified first TCI state, the second TCI state, and one of the first TCI state and the second TCI state.

[0013] A base station in a wireless communication system, the base station comprising: a transceiver; and at least one processor coupled to the transceiver and configured to: send information of multiple transmission configuration indication TCI states via radio resource control (RRC) signaling, the multiple TCI states including a first TCI state and a second TCI state, and send a first physical downlink shared channel (PDSCH) scheduled by a first downlink control information (DCI) format, or a first PDSCH configured by RRC signaling and activated by a first DCI format to a user equipment (UE) by applying the first TCI state, the second TCI state, and one of the first TCI state and the second TCI state, wherein the first TCI state, the second TCI state, and one of the first TCI state and the second TCI state are identified based on an indication sent from the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0015] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0016] Figure 2 An example gNB according to an embodiment of the present disclosure is shown;

[0017] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0018] Figure 4 and Figure 5 Example wireless transmit and receive paths according to the present disclosure are shown;

[0019] Fig. 6A and Figure 6B An example beam management operation for UL CG PUSCH according to an embodiment of the present disclosure is shown;

[0020] Figure 7 A flow chart of a method for beam determination with enhanced timing for CG PUSCH transmission according to an embodiment of the present disclosure is shown;

[0021] Figure 8 A flow chart of a method for enhanced beam determination using multiple beams for CG PUSCH transmission according to an embodiment of the present disclosure is shown;

[0022] Fig. 9 A flowchart of a method for beam determination using enhanced timing for SPS PDSCH according to an embodiment of the present disclosure is shown;

[0023] Fig.10 A flow chart of a method for enhancing beam determination using multiple beams for SPS PDSCH according to an embodiment of the present disclosure is shown;

[0024] Fig.11 A flow chart of a method for performing a beam failure recovery similar process for CG PUSCH / SPS PDSCH according to an embodiment of the present disclosure is shown;

[0025] Fig.12 illustrates example operations of an enhanced repetition scheme for CG PUSCH according to an embodiment of the present disclosure;

[0026] Fig.13 A flowchart of a method for an enhanced repetition scheme for CG PUSCH according to an embodiment of the present disclosure is shown;

[0027] Fig.14 A flowchart of a method for a UE to determine the number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown;

[0028] Fig.15 A flow chart showing a method for explicitly indicating a UE-determined number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown;

[0029] Fig.16 A flow chart of a method for implicitly indicating a UE-determined number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown;

[0030] Fig.17 A flowchart of a method for explicitly indicating the number of repetitions for an SPS PDSCH according to an embodiment of the present disclosure is shown;

[0031] Fig.18 A flowchart of a method for implicitly indicating the number of repetitions for SPS PDSCH according to an embodiment of the present disclosure is shown;

[0032] Fig.19 A flowchart of a method for repeating using beam cycling for CG PUSCH according to an embodiment of the present disclosure is shown;

[0033] Fig. 20 A flow chart of a method for late start of sending high priority traffic on CG PUSCH according to an embodiment of the present disclosure is shown;

[0034] Fig.21 An example operation of performing enhanced / flexible repetition for a CG PUSCH carrying high priority traffic according to an embodiment of the present disclosure is shown;

[0035] Fig. 22 A flow chart showing a method for location / zone specific configuration of CG PUSCH / SPS PDSCH according to an embodiment of the present disclosure;

[0036] Fig.23 A base station according to an embodiment of the present disclosure is shown; and

[0037] Fig.24 A user equipment (UE) according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] The present disclosure relates to wireless communication systems, and more particularly, to beam management and coverage enhancement for semi-persistent transmission and configuration grant transmission.

[0039] In one embodiment, a method for transmitting a signal or a channel is provided. The method includes: receiving a configuration for a spatial filter, determining a first spatial filter and a second spatial filter from the spatial filter, and determining a first number of repetitions and a second number of repetitions. The spatial filters correspond to a spatial relationship with a reference signal (RS), respectively. The first spatial filter and the second spatial filter are different. The first number of repetitions and the second number of repetitions are different. The method also includes using the first spatial filter with a first number of repetitions and using the second spatial filter with a second number of repetitions to transmit a signal or a channel. The second number of repetitions is transmitted after the first number of repetitions.

[0040] In one embodiment, the signal or channel is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH) and a sounding reference signal (SRS).

[0041] In one embodiment, the method further includes: receiving a configuration for a set of repetition numbers, a configuration for a set of reference signal received power (RSRP) ranges, and a configuration for a first RS and for a second RS, wherein the first RS and the second RS have a spatial relationship with a first spatial filter and a second spatial filter, respectively; determining a first RSRP for the first RS and a second RSRP for the second RS; and determining a first number of repetitions from an RSRP range in an RSRP range set including the first RSRP and determining a second number of repetitions from an RSRP range in an RSRP range set including the second RSRP.

[0042] In one embodiment, the method also includes: receiving a physical downlink control channel (PDCCH) providing a downlink control information (DCI) format, the DCI format including multiple values ​​for corresponding multiple fields; and determining a first number of repetitions and a second number of repetitions from values ​​in multiple values ​​of a field in the multiple fields.

[0043] In one embodiment, the first number of repetitions and the second number of repetitions are included as information in the channel transmission.

[0044] In one embodiment, the method further comprises determining the first spatial filter from a sounding reference signal (SRS) resource indicator (SRI), wherein the SRI is associated with a most recent SRS transmission at least a predetermined UE processing time prior to signal or channel transmission.

[0045] In one embodiment, the method also includes: determining a first spatial filter from a first transmission configuration indication (TCI) state associated with a first reference signal (RS), wherein the first RS is a most recent RS associated with a first TCI state received at least a predetermined UE processing time before a first repetition from a first number of repetitions; and determining a second spatial filter from a second TCI state associated with a second RS, wherein the second RS is a most recent RS associated with a second TCI state received at least a predetermined UE processing time before a second repetition from a second number of repetitions.

[0046] In another embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive a configuration for a spatial filter. The spatial filters correspond to spatial relationships with reference signals (RSs) respectively. The UE also includes a processor operably connected to the transceiver. The processor is configured to determine a first spatial filter and a second spatial filter from the spatial filter, and to determine a first number of repetitions and a second number of repetitions. The first spatial filter and the second spatial filter are different. The first number of repetitions and the second number of repetitions are different. The transceiver is also configured to send a signal or channel using the first spatial filter with a first number of repetitions and using the second spatial filter with a second number of repetitions. The second number of repetitions is sent after the first number of repetitions.

[0047] In one embodiment, the signal or channel is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH) and a sounding reference signal (SRS).

[0048] In one embodiment, wherein: the transceiver is further configured to receive a configuration for a set of repetition numbers, a configuration for a set of reference signal received power (RSRP) ranges, and a configuration for a first RS and for a second RS, wherein the first RS and the second RS have a spatial relationship with a first spatial filter and a second spatial filter, respectively; and the processor is further configured to: determine a first RSRP for the first RS and a second RSRP for the second RS, and determine a repetition of the first number of times from an RSRP range from a set of RSRP ranges including the first RSRP and determine a repetition of the second number of times from an RSRP range from a set of RSRP ranges including the second RSRP.

[0049] In one embodiment, wherein: the transceiver is also configured to receive a physical downlink control channel (PDCCH) providing a downlink control information (DCI) format, the DCI format including multiple values ​​for corresponding multiple fields, and the processor is also configured to determine the first number of repetitions and the second number of repetitions based on a value in the multiple values ​​of a field in the multiple fields.

[0050] In one embodiment, the first number of repetitions and the second number of repetitions are included as information in the channel transmission.

[0051] In one embodiment, wherein: the processor is further configured to determine the first spatial filter from a sounding reference signal (SRS) resource indicator (SRI), and the SRI is associated with a most recent SRS transmission at least a predetermined UE processing time before the signal or channel is transmitted.

[0052] In one embodiment, the processor is further configured to determine a first spatial filter from a first transmission configuration indication (TCI) state associated with a first reference signal (RS), wherein the first RS is a most recent RS associated with a first TCI state received at least a predetermined UE processing time before a first repetition from a first number of repetitions, and to determine a second spatial filter from a second TCI state associated with a second RS, wherein the second RS is a most recent RS associated with a second TCI state received at least a predetermined UE processing time before a second repetition from a second number of repetitions.

[0053] In yet another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to send a configuration for a spatial filter. The spatial filters correspond to spatial relationships with reference signals (RSs), respectively. The BS also includes a processor operably connected to the transceiver. The processor is configured to determine a first spatial filter and a second spatial filter from the spatial filter, and to determine a first number of repetitions and a second number of repetitions. The first spatial filter and the second spatial filter are different. The first number of repetitions and the second number of repetitions are different. The transceiver is configured to receive a signal or a channel using the first spatial filter with a first number of repetitions and the second spatial filter with a second number of repetitions. The second number of repetitions is received after the first number of repetitions.

[0054] In one embodiment, the signal or channel is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH) and a sounding reference signal (SRS).

[0055] In one embodiment, the transceiver is further configured to send: a configuration for a set of repetition times, a configuration for a set of reference signal received power (RSRP) ranges, and a configuration for a first RS and for a second RS, wherein the first RS and the second RS have a spatial relationship with the first spatial filter and the second spatial filter, respectively.

[0056] In one embodiment, wherein: the processor is also configured to determine a first number of repetitions and a second number of repetitions; and the transceiver is also configured to send a physical downlink control channel (PDCCH) providing a downlink control information (DCI) format, the DCI format comprising multiple values ​​for corresponding multiple fields, wherein a value in a multiple value of a field in the multiple fields indicates a first number of repetitions and a second number of repetitions.

[0057] In one embodiment, the first number of repetitions and the second number of repetitions are included as information in the channel reception.

[0058] In one embodiment, the processor is further configured to determine a first spatial filter from a first transmission configuration indication (TCI) state associated with a first reference signal (RS), wherein the first RS is a most recent RS associated with a first TCI state sent at least a predetermined UE processing time before a first repetition from a first number of repetitions, and to determine a second spatial filter from a second TCI state associated with a second RS, wherein the second RS is a most recent RS associated with a second TCI state sent at least a predetermined UE processing time before a second repetition from a second number of repetitions.

[0059] Other technical features will be readily apparent to those skilled in the art from the following drawings, descriptions and claims.

[0060] Before proceeding to the following detailed description, it may be advantageous to set forth 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, whether or not these elements are in physical contact with each other. The terms "send", "receive" and "communication" and their derivatives cover both direct and indirect communication. The terms "include" and "comprise" and their derivatives mean to include without limitation. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean to include, be included, interconnect with..., include, be included, be connected to or with..., be coupled to or with..., be coupled to, can communicate with..., collaborate with..., interweave, juxtapose, be close to, be coupled to or with..., have, have the property of..., 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 with hardware or a combination of hardware and software and / or firmware. The function associated with any particular controller can be centralized or distributed, whether local or remote. When used with a list of items, the phrase "at least one of" 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 needed. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

[0061] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or a part thereof suitable for implementation with a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store data and overwrite it later, such as rewritable optical discs or erasable memory devices.

[0062] Definitions for other specific words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most, instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0063]

Invention Mode

[0064] Discussed below Figures 1 to 24 The various embodiments used to describe the principles of the present disclosure in this patent document are merely illustrative 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.

[0065] Fifth generation (5G) or New Radio (NR) mobile communications are gathering more and more momentum recently with all the global technical activities for various candidate technologies from industry and academia. 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 large-scale connections; and so on.

[0066] The following documents are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v15.7.0, “NR; Physical channels and modulation”; 3GPP TS 38.212 v15.7.0, “NR; Multiplexing and Channel coding”; 3GPP TS 38.213 v15.7.0, “NR; Physical Layer Procedures for Control”; 3GPP TS 38.214 v15.7.0, “NR; Physical Layer Procedures for Data”; 3GPP TS 38.321 v15.7.0, “NR; Medium Access Control (MAC) protocol specification”; and 3GPP TS 38.331 v15.7.0, “NR; Radio Resource Control (RRC) Protocol Specification”.

[0067] under Figure 1-Figure 3Various 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. Figure 1-Figure 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 present disclosure may be implemented in any suitably arranged communications system.

[0068] 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 is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0069] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), 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 the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0070] 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 in a small business; UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M) such as a cellular phone, 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 includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, LTE, LTE-A, WiMAX, WiFi, or other wireless communication technologies.

[0071] Depending on the network type, the term "base station" or "BS" may refer to any component (or set 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-enabled device. A base station may provide wireless access according to one or more wireless communication protocols (e.g., 5G / NR 3GPP NR, 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" 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" may 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" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0072] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation 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 man-made obstacles.

[0073] As described in more detail below, one or more of the UEs 111-116 include circuitry, programming, or a combination thereof for beam management and coverage enhancement for semi-persistent transmissions and configuration grant transmissions. In certain embodiments, one or more of the gNBs 101-103 include circuitry, programming, or a combination thereof for beam management and coverage enhancement for semi-persistent transmissions and configuration grant transmissions.

[0074] although Figure 1 An example of a wireless network is shown, but Figure 1Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide wireless broadband access to network 130 to these UEs. Similarly, each gNB 102-103 may communicate directly with network 130 and provide direct wireless broadband access to network 130 to the UEs. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0075] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 2 There is no intent to limit the scope of the present disclosure to any particular implementation of the gNB.

[0076] like Figure 2 As shown, 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.

[0077] The RF transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals transmitted by UEs in the network 100. The RF transceivers 210a-210n downconvert 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.

[0078] 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 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.

[0079] 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 by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing / incoming signals from / to multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. The controller / processor 225 may support any of a variety of other functionality in the gNB 102.

[0080] Controller / processor 225 is also capable of executing 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 process being executed.

[0081] 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 may support communication via any suitable (multiple) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may 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 suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0082] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, and another portion of memory 230 may include flash memory or other ROM.

[0083] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2As 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 shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 may include multiple instances of each (such as one instance per RF transceiver). In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0084] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration only, and Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0085] like Figure 3 As shown, UE 116 includes antenna 305, radio frequency (RF) transceiver 310, TX processing circuit 315, microphone 320 and receive (RX) processing circuit 325. UE 116 also includes speaker 330, 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.

[0086] RF transceiver 310 receives incoming RF signals from antenna 305 transmitted by a gNB of network 100. RF transceiver 310 downconverts the incoming RF signals to produce an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (e.g., for voice data) or processor 340 (such as for web browsing data) for further processing.

[0087] 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.

[0088] The processor 340 may include one or more processors or other processing devices and executes the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, according to well-known principles, the processor 340 may 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. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0089] The processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for beam management. The processor 340 can move data into or out of the memory 360 as required by the process being executed. In some embodiments, the processor 340 is configured to execute 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.

[0090] Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 may input 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 rendering text and / or at least limited graphics (such as from a website).

[0091] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), and another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0092] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3The various components in the embodiment may be combined, further subdivided, or omitted, and additional components may be added as required. 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). In addition, although 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.

[0093] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems and to realize various vertical applications, efforts have been made to develop and deploy improved 5G / NR or pre-5G / NR communication systems. Therefore, 5G / NR or pre-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 (millimeter wave) bands (e.g., 28GHz or 60GHz bands) to achieve higher data rates, or in lower frequency bands (e.g., 6GHz) to achieve robust coverage and mobility support. Aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even later versions of deployment that can use terahertz (THz) bands. 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.

[0094] In addition, in the 5G / NR communication system, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0095] The communication system includes downlink (DL) and uplink (UL), DL refers to transmission from a base station or one or more transmission points to a UE, and UL refers to transmission from a UE to a base station or one or more reception points.

[0096] The time unit for DL ​​signaling or for UL signaling on a cell is called a time slot and may include one or more symbols. A symbol may also be used 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 include 12 SCs, where the spacing between SCs is 15 KHz or 30 KHz, and so on.

[0097] DL signals include data signals that convey information content, control signals that convey DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB sends data information or DCI through the corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). PDSCH or PDCCH can be sent on a variable number of time slot symbols including one time slot symbol. For simplicity, the DCI format that schedules PDSCH reception by the UE is called the DL DCI format, and the DCI format that schedules physical uplink shared channel (PUSCH) transmission from the UE is called the UL DCI format.

[0098] 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 for 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 reporting (IMR), CSI interference measurement (CSI-IM) resources associated with zero power CSI-RS (ZP CSI-RS) configuration are used. The CSI process includes NZP CSI-RS and CSI-IM resources.

[0099] 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. The transmission instance of CSI-RS can be indicated by DL control signaling or configured by high-layer signaling. DMRS is transmitted only in the BW of the corresponding PDCCH or PDSCH, and the UE can use DMRS to demodulate data or control information.

[0100] Figure 4 and Figure 5 Example wireless transmit and receive paths according to the present disclosure are shown. In the following description, transmit path 400 may be described as being implemented in a gNB (such as gNB 102) and receive path 500 may be described as being implemented in a UE (such as UE 116). However, it is understood that receive path 500 may be implemented in a gNB and transmit path 400 may be implemented in a UE. In some embodiments, receive path 500 is configured to support codebook design and structure for a system with a 2D antenna array as described in embodiments of the present disclosure.

[0101] like Figure 4The transmit path 400 shown includes a channel coding and modulation block 405, a serial-to-parallel conversion (SP) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel-to-serial conversion (PS) block 420, an add cyclic prefix block 425, and an up-converter (UC) 430. Figure 5 The illustrated receive path 500 includes a downconverter (DC) 555 , a cyclic prefix removal block 560 , a serial-to-parallel conversion (SP) block 565 , a size-N fast Fourier transform (FFT) block 570 , a parallel-to-serial conversion (PS) block 575 , and a channel decoding and demodulation block 580 .

[0102] As shown in diagram 400, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity-check (LDPC) coding), and modulates the input bits (such as with quadrature phase-shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols.

[0103] The serial-to-parallel conversion block 410 converts (e.g., demultiplexes) the serially modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in the gNB 102 and the UE 116. The size-N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate a time domain output signal. The parallel-to-serial conversion block 420 converts (e.g., multiplexes) the parallel time domain output symbols from the size-N IFFT block 415 to generate a serial time domain signal. The add cyclic prefix block 425 inserts a cyclic prefix into the time domain signal. The up-converter 430 modulates (e.g., up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before conversion to RF frequency.

[0104] The RF signal transmitted from gNB 102 reaches UE 116 after passing through the wireless channel, and an operation opposite to that at gNB 102 is performed at UE 116.

[0105] like Figure 5 As shown, the down converter 555 down-converts the received signal to the baseband frequency, and the cyclic prefix removal block 560 removes the cyclic prefix to generate a serial time domain baseband signal. The serial-to-parallel conversion block 565 converts the time domain baseband signal into a parallel time domain signal. The FFT block 570 of size N performs an FFT algorithm to generate N parallel frequency domain signals. The parallel-to-serial conversion block 575 converts the parallel frequency domain signals into a sequence of modulated data symbols. The channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0106] Each of gNBs 101-103 may implement Figure 4The transmission path 400 shown is similar to that for transmitting in the downlink to UEs 111-116 and may be implemented as follows: Figure 5 1-103. The receive path 500 shown is similar to that for receiving in the uplink from UE 111-116. Similarly, each of UE 111-116 may implement transmit path 400 for transmitting in the uplink to gNB 101-103 and may implement receive path 500 for receiving in the downlink from gNB 101-103.

[0107] Figure 4 and Figure 5 Each component in may be implemented using hardware only or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5 At least some components in can be implemented with software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 570 and IFFT block 515 can be implemented as a configurable software algorithm, wherein the value of size N can be modified according to the implementation.

[0108] In addition, although described as using FFT and IFFT, this is by way of illustration only and should not be construed as limiting the scope of the present disclosure. Other types of transforms may be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It will be appreciated that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer (such as 1, 2, 4, 8, 16, etc.) that is a power of 2.

[0109] although Figure 4 and Figure 5 An example of a wireless transmit and receive path is shown, but the Figure 4 and Figure 5 Make various changes. For example, Figure 4 and Figure 5 The various components in may be combined, further subdivided, or omitted, and additional components may be added as required. Figure 4 and Figure 5 It is intended to illustrate examples of the types of transmit and receive paths that may be used in a wireless network. Any other suitable architecture may be used to support wireless communications in a wireless network.

[0110] The present disclosure relates to a pre-5G or 5G communication system provided to support one or more of the following: higher data rates, lower latency, higher reliability and massive connectivity, beyond 4G communication systems (such as LTE). Although the focus of the present disclosure is on 3GPP 5G NR communication systems, various embodiments may generally be applied to UEs operating with other RATs and / or standards (such as different versions / generations of 3GPP standards (including beyond 5G, 6G, etc.), IEEE standards (such as 802.16 WiMAX and 802.11 Wi-Fi), etc.).

[0111] The present disclosure relates to a UE or a group of UEs with reduced cost and / or complexity, or, in general, a reduced capability (REDCAP) UE. For example, a REDCAP UE may have one or more of the following: reduced bandwidth, reduced number of Rx and / or Tx RF chains, reduced power class, compared to a traditional / baseline UE or UE group / category such as defined in 3GPP 5G NR Rel-15. A REDCAP UE or UE group may be identified as a UE category (or multiple UE categories) that meets certain predetermined / specified radio and / or service requirements and / or certain predetermined / specified UE capabilities. A REDCAP UE or UE group / category may also support certain features, such as features for coverage recovery or coverage enhancement. Examples of such REDCAP UEs may include smart wearable devices / watches, surveillance cameras, and (mid-end) wireless sensors. In certain scenarios and deployments, there may be a large number (e.g., dozens or hundreds or more) of REDCAP UEs within a serving cell.

[0112] The present disclosure also relates to any UE that benefits from / requires coverage enhancement, for example due to deployment scenarios that may experience large propagation losses (such as usage deep in buildings), or due to a reduced number of receiver antennas, or due to reduced power levels of amplifiers in the UE transmitter.

[0113] The present disclosure also relates to any UE that benefits from reduced transmission overhead and reduced receiver complexity, such as transmissions with reduced control information, reduced PDCCH monitoring requirements, transmissions with configuration grant (CG), or transmissions with semi-persistent scheduling (SPS).

[0114] Downlink Semi-Persistent Scheduling (DL SPS) and Uplink Configuration Grant (UL CG) configuration provide efficient resource utilization means with low control signaling overhead for periodic or semi-persistent services.

[0115] Coverage enhancement may be provided by using narrower transmit beams because the total transmit power may be contained in the spatial dimension rather than being evenly distributed in space such as when using omni-directional antennas.

[0116] Therefore, there is a need for improved beam management, including beam selection and / or beam refinement for UL CG / DL SPS transmission / reception, especially when UE mobility needs to be supported and / or when the signal quality of (multiple) beams changes over time.

[0117] There is also a need to improve coverage for UL CG / DL SPS transmission / reception in response to changes in channel / beam quality over time.

[0118] There is also a need to develop enhancements supporting UL CG / DL SPS transmission / reception so that they do not introduce (significant) additional signaling overhead to the system.

[0119] The present disclosure provides enhancements to DL SPS and / or UL CG configuration and transmission, wherein the enhancements focus on at least one or more of the following: improved channel / beam quality for UL CG / DL SPS transmission / reception via beam management enhancements (such as beam selection, beam refinement, and beam failure recovery operations) for UL CG / DL SPS transmission based on UE autonomous decision, or gNB guidance or indication, or a combination thereof; improved coverage for UL CG / DL SPS transmission via enhanced repetition schemes (such as dynamic and autonomous UE selection of the number of repetitions for UL CG transmission); improved latency for UL CG transmission by supporting flexible start times for UL CG transmission opportunities; and location-based configuration of UL CG / DL SPS to allow all UEs within a specific geographic area to use a common UL CG / DL SPS configuration.

[0120] One motivation for focusing on enhanced beam management and enhanced repetition schemes is to improve coverage for UL CG / DL SPS transmissions for use cases related to massive IoT or REDCAP UEs as well as traditional eMBB UEs that require coverage enhancement, e.g., due to operating in higher carrier frequencies. However, these embodiments are general and may also be applied to other use cases, such as for services requiring enhanced reliability, sidelink / V2X communications, etc.

[0121] The present disclosure addresses the above-mentioned concepts and provides additional design aspects for supporting enhanced beam management mechanisms and coverage enhancement methods (including enhanced repetition schemes) for DL ​​SPS or UL CG transmissions, and discloses novel solutions and embodiments for DL ​​SPS / UL CG operations as outlined below and will be fully described subsequently.

[0122] In one embodiment, enhanced beam management for the UL CG is provided to provide a separate beam indication set for the UL CG compared to dynamically scheduled / triggered UL transmission.

[0123] In one example, enhanced timing for beam indication for UL CG is provided to support dynamic beam changes for UL CG such that each UL CG transmission opportunity follows the implementation of the last UL CG beam before that transmission opportunity and can potentially be different from the beam implementation for other UL CG transmission opportunities.

[0124] In another example, a UL CG PUSCH with multiple beam indication resources is provided to support a single UL CG configured with multiple beam indication RS resources, so that each transmission opportunity can follow different beam indication RS resources (from multiple resources) based on gNB indication or UE selection (such as resource-based UE measurement) or a combination thereof.

[0125] In one embodiment, enhanced beam management and indication for DL ​​SPS is provided. In one embodiment, enhanced timing for beam indication for DL ​​SPS is provided. In one embodiment, a DL SPS PDSCH with multiple beam indication resources is provided, which provides similar beam management enhancements for DL ​​SPS as described above for the UL CG case.

[0126] In one embodiment, a similar process for beam failure recovery for UL CG / DL SPS is provided, which describes a method for replacing (multiple) beams configured / indicated for UL CG or DL ​​SPS and detected by the UE as failing in link quality, so that the UE can continue to use the UL CG / DL SPS resources even after the failure of the corresponding beam. According to some provided solutions, this benefit can be achieved with reduced overhead, for example, without any gNB signaling.

[0127] In one embodiment, an enhanced repetition mechanism for UL CG is provided, which supports the gNB to indicate / configure a set or range of valid / allowed repetition numbers for the UE to select from such minimum and maximum repetition numbers or, for example, a baseline repetition number and a scaling factor / ratio.

[0128] In one example, a method is provided for a UE to determine a UL CG repetition number, so that the UE selects an actual repetition number for each UL CG transmission opportunity (from a set / range of allowed values) based on UE measurements of one or more configured / indicated RS resources.

[0129] In another example, a method is provided for the UE to indicate to the gNB about the number of UL CG repetitions selected by the UE, such as, for example, an explicit indication in the CG-UCI multiplexed on the CG PUSCH, or an implicit indication using, for example, different DMRS characteristics depending on the number of repetitions.

[0130] In another example, an enhanced repetition mechanism for DL ​​SPS is provided, which provides similar repetition enhancement for DL ​​SPS as described above for UL CG.

[0131] In one embodiment, beam selection and beam cycling are provided for repetitions of a UL CG configured with multiple beams so that all repetitions of the UL CG are sent with the same beam, or the repetitions are sent in groups such that each repetition group corresponds to a potentially different beam and each repetition group may include the same or different number of repetitions.

[0132] In one example, beam selection and beam cycling are provided for repetition of a DL SPS configured with multiple beams, which provides a repetition enhancement for the DL SPS similar to that briefly described above for the case of UL CG.

[0133] In one embodiment, enhanced UL CG repetition is provided for high priority traffic to allow the UE to start transmitting on a symbol / slot / repetition of a UL CG transmission opportunity that is different from the first symbol / slot / repetition of the UL CG transmission opportunity, along with an indication to the gNB on the starting point allowed. There may be a threshold for the gNB indication on how late the UE can start transmitting on a UL CG transmission opportunity.

[0134] In one embodiment, location-based configuration of UL CG / DL SPS is provided to support configuration of transmission resources and / or parameters for UL CG / DL SPS based on geographic location parameters, such as a zone-specific configuration of UL CG / DL SPS to be used for all UEs in the zone. Location or zone determination can be based on, for example, V2X zones, GPS signals, and / or positioning reference signals (PRS).

[0135] Dynamic data transmission in the downlink (DL) or uplink (UL) of a communication system refers to the aperiodic transmission of information on the PDSCH or PUSCH scheduled by the DCI format in the PDCCH reception.

[0136] The DCI format can indicate parameters related to resource allocation, power control, scheduling and HARQ, such as: time domain resource allocation (TDRA), frequency domain resource allocation (FDRA), virtual resource to physical resource mapping (for interleaved case), modulation and coding scheme (MCS), UL frequency hopping parameters, HARQ process number (HPN), new data indicator (NDI), redundancy version (RV), and (for PUSCH) TPC for PUSCH or (for PDSCH) PUCCH resource index, TPC for PUCCH, PDSCH to HARQ feedback timing, and downlink assignment index (DAI).

[0137] The DCI format may further include parameters related to cross scheduling, MIMO operation, enhanced HARQ operation, control information multiplexing, rate matching, and repetition, such as indications of one or more of the following: cell / carrier / bandwidth part (BWP), antenna port, transmission configuration indicator / sounding reference signal (SRS) resource indicator (TCI / SRI), precoding matrix indicator (PMI), CSI-RS trigger / request, SRS trigger / request, DMRS initialization, PTRS association, number of code block groups (CBGs), CBG flushing indicator, DAI (for multiplexing HARQ codebooks on PUSCH), uplink shared channel (UL-SCH) indicator, beta_offset, physical resource block (PRB) bundling size, rate matching indicator, number of repetitions, etc.

[0138] The order and / or bit width of the information fields (IEs) in the DCI format may be predetermined in the system specification and / or may be configurable.

[0139] The UE may receive a PDCCH providing a DCI format according to a UE-specific search space (USS), wherein the CRC of the DCI format is scrambled by a UE-specific radio network temporary identifier (RNTI), such as a cell RNTI (C-RNTI) or a modulation and coding scheme cell RNTI (MCS-C-RNTI). Dynamic PDSCH or PUSCH transmissions may be repeated multiple times as configured by RRC or as indicated by DCI, where the repetitions may be based on time slots (also referred to as time slot aggregation or repetition type 1) or on a shorter time scale / duration (repetition type 2).

[0140] The UE may also receive a PDCCH that provides a DCI format based on a common search space (CSS). The DCI formats provided by the PDCCH reception based on the CSS include: a DCI format that provides a DL / UL slot format indication (SFI), a DCI format that provides a DL or UL transmission interruption / cancellation / preemption, a DCI format that provides a TPC command for PUSCH, PUCCH, SRS, and the like.

[0141] Antenna ports are defined such that the channel over which a symbol on the antenna port is transmitted can be inferred from the channel over which another symbol on the same antenna port is transmitted.

[0142] Two antenna ports are said to be quasi co-located (QCL) if the large-scale properties of the channel over which the symbols on one antenna port are transmitted can be inferred from the channel over which the symbols on the other antenna port are transmitted. The large-scale properties include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters.

[0143] The UE may be configured with a list of up to M TCI state configurations within the higher layer parameter PDSCH-Config to decode the PDSCH based on the detected PDCCH with DCI for the UE and a given serving cell, where M depends on the UE capability maxNumberConfiguredTCIstatesPerCC. Each TCI state contains parameters for configuring the QCL relationship between one or two downlink reference signals and the DMRS ports of the PDSCH, the DMRS ports of the PDCCH, or the (multiple) CSI-RS ports of the CSI-RS resources.

[0144] The quasi co-location relationship is configured by the higher layer parameters qcl-Type1 for the first DL RS and qcl-Type2 (if configured) for the second DL RS. For the case of two DL RSs, the QCL type may be different, regardless of whether the reference is to the same DL RS or different DL RSs.

[0145] The quasi-co-positioning type corresponding to each DL RS is given by the high-level parameter qcl-Type in QCL-Info, and can take one of the following values: "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}; "QCL-TypeB": {Doppler shift, Doppler spread}; "QCL-TypeC": {Doppler shift, average delay}; and "QCL-TypeD": {spatial Rx parameters}.

[0146] The UE receives a medium access control-control element (MAC-CE) activation command to map up to N (such as N=8) TCI states to code points of the DCI field "Transmission Configuration Indication". When HARQ confirmation (HARQ-ACK) information corresponding to the PDSCH carrying the MAC-CE activation command is sent in time slot n, the mapping between the indicated TCI state and the code point of the DCI field "Transmission Configuration Indication" can be applied after the MAC-CE application time, for example, from time slot (e.g. ) starts with the first time slot after is the number of time slots per subframe for subcarrier spacing (SCS) configuration μ.

[0147] Throughout this disclosure, the terms "transmission" and "retransmission" (if not clarified) are used to refer to transmission from the UE side or transmission from the gNB side (i.e., reception at the UE side), which can be clear from the context. Throughout this disclosure, the term "dynamic PUSCH transmission" is used to refer to PUSCH transmission scheduled by DCI format.

[0148] Throughout this disclosure, the term "initial transmission" or the term "original transmission" is used to refer to a transmission or a corresponding reception prior to any HARQ retransmissions and / or HARQ combining.

[0149] Throughout this disclosure, the terms “DL SPS” and “SPS PDSCH” and “DL SPS PDSCH” may be used interchangeably, with details and definitions as discussed below and throughout this disclosure.

[0150] Throughout this disclosure, the terms “UL CG” and “CG PUSCH” and “UL CG PUSCH” may be used interchangeably, with details and definitions as discussed below and throughout this disclosure.

[0151] In some use cases and scenarios (such as Voice over Internet Protocol (VoIP), sensor measurements, data collection, etc.), a periodic or semi-persistent data traffic pattern is desired on the DL or UL. Such a traffic pattern encourages the use of (pre-)configured resources and scheduling for data transmission to avoid the control overhead associated with scheduling data transmission using DCI format in PDCCH transmission. For such periodic or semi-persistent DL or UL data transmission, SPS and / or CG transmission is preferred.

[0152] CG PUSCH Type 1 configuration involves entirely RRC-based configuration, activation and release / deactivation of resource allocation and transmission parameters, possibly in addition to some implicit parameter determinations. CG PUSCH Type 2 configuration involves some resource allocation and transmission parameter indications configured by RRC, while other resource allocation and transmission parameter indications are provided through the DCI format that activates CG-PUSCH Type 2 transmissions, possibly in addition to some implicit parameter determinations. The release of resources configured to the UE for CG-PUSCH Type 2 transmissions is indicated through the deactivation / release DCI format.

[0153] For semi-persistent DL data transmission, a DL SPS configuration is defined, where some resource allocation and transmission parameter indications are provided through RRC configuration, while the remaining resource allocation and transmission parameters and activation of DL SPS transmission are indicated through activation DCI formats, possibly in addition to some implicit parameter determinations. The release of resources configured to the UE for DL ​​SPS reception is indicated through deactivation / release DCI formats. This operation for DL ​​SPS transmission is similar to CG PUSCH Type 2 transmission.

[0154] Operations for DL ​​SPS transmission similar to UL CG Type 1 for DL ​​services (which entirely involve semi-static (i.e., RRC) configuration, activation, and release / deactivation of resource allocation and transmission parameters, possibly except for some implicit parameter determination) can be considered and referred to as DL SPS Type 1; therefore, the above-mentioned DL SPS configuration (which follows a combination of RRC signaling and DCI signaling) can be considered as DL SPS Type 2 configuration.

[0155] For example, RRC signaling can configure the following parameters for DL ​​SPS type 2: periodicity, number of HARQ processes, PUCCH resource index for HARQ feedback, and MCS. In another example, RRC can configure the following parameters: periodicity, number of HARQ processes, timer (e.g., for releasing DL SPS type 2 resources in inactivity), MCS table, open-loop and closed-loop power control parameters, number of repetitions, repeated RV. For DL ​​SPS type 2 configuration, other transmission parameters are also RRC configured, such as: time / frequency allocation, frequency hopping parameters, MCS, MIMO-related parameters (such as antenna ports), SRI, PMI, DMRS initialization, and path loss RS index, and these parameters are indicated by the DCI format for CG PUSCH type 2 or for DL ​​SPS type 2.

[0156] For DL ​​SPS type 2 and CG PUSCH type 2 transmissions, the (multiple) repetitions may be slot-based or based on a shorter time scale (such as a time scale over multiple symbols), and the number of repetitions may be indicated by activating the DCI format (for DL ​​SPS type 1) or configured by higher layers (for DL ​​SPS type 2).

[0157] HARQ related information for SPS PDSCH / CG PUSCH can be implicitly determined. For example, the HARQ process number for SPS PDSCH / CG PUSCH can be determined based on the timing of the SPS PDSCH / CG PUSCH transmission opportunity (e.g., starting symbol / time slot) using a predetermined formula in the system specification, and can also be determined based on the configured offset value.

[0158] For example, for SPS PDSCH, the HARQ process identifier (ID) associated with the time slot where the DL transmission starts is derived as:

[0159] HARQ process ID = [floor (CURRENT_slot (current slot) X 10 / (numberOfSlotsPerFrameX periodicity))] modulo nrofHARQ-Processes,

[0160] Wherein, CURRENT_slot = [(SFNxnumberOfSlotsPerFrame) + number of slots in a frame], and numberOfSlotsPerFrame refers to the number of consecutive slots per frame, where SFN is the system frame number.

[0161] In another example, for a configured uplink grant (ie, UL CG PUSCH), the HARQ process ID associated with the first symbol of the UL transmission is derived from the following equation:

[0162] HARQ process ID = [floor (CURRENT_symbol (current symbol) / periodicity)] modulo nrofHARQ-Processes, where CURRENT_symbol = (SFNXnumberOfSlotsPerFrameXnumberOfSymbolsPerSlot+number of slots in a frameXnumberOfSymbolsPerSlot+number of symbols in a slot),

[0163] And, numberOfSlotsPerFrame and numberOfSymbolsPerSlot refer to the number of consecutive time slots per frame and the number of consecutive symbols per time slot.

[0164] In one example, to determine the NDI, only initial transmissions may be allowed / supported on the SPS PDSCH / CG PUSCH transmissions, and any retransmissions may be scheduled using the DCI format. Then, the NDI field is not required. In another example, the redundancy version for the SPS PDSCH / CG PUSCH transmission may be fixed to RV=0, and for the case of repetitions, the RV used for each repetition may be based on a sequential / cyclic selection of RVs from a configured RV set (e.g., {0,0,0,0} or {0,3,0,3} or {0,2,3,1}).

[0165] In another example, for certain applications, such as for operations utilizing shared spectrum, HARQ related parameters (such as HPN and RV) for CG PUSCH transmissions may be determined by the UE and then multiplexed as a configuration grant UCI (CG-UCI) with the data information in the CG-PUSCH transmission. In addition, by including the NDI field in the CG-UCI, HARQ retransmissions of initial CG PUSCH transmissions using UL CG resources may be allowed.

[0166] In response to SPS PDSCH reception, a PUCCH resource index may be provided to the UE by a higher layer (RRC signaling) to send a PUCCH with HARQ-ACK information. In one example, the PUCCH resource may be indicated / updated by a DCI format that activates SPS PDSCH reception. The DCI format may also indicate PDSCH to HARQ feedback timing. A TPC command for CG PUSCH or for PUCCH with HARQ-ACK information received for SPS PDSCH may be provided by a corresponding DCI format, which is a DCI format in which the UE receives the corresponding PDCCH according to the CSS and provides a TPC command to the UE.

[0167] HARQ-ACK feedback for CG-PUSCH transmissions may or may not be supported. In one example, HARQ-ACK feedback for CG PUSCH transmissions from the UE is not supported and the UE monitors the PDCCH in a predetermined / configured time window after the CG PUSCH transmission to detect a DCI format that schedules HARQ retransmissions for the CG PUSCH. If the UE does not detect any DCI format before the end of the time window, the UE assumes that the gNB correctly decoded the transport block in the CG PUSCH transmission.

[0168] The UE cannot distinguish between the case where the gNB fails to detect the presence of a CG PUSCH transmission and the case where the gNB correctly decodes the transport block in the CG PUSCH transmission. In another example, HARQ-ACK feedback for CG PUSCH transmission is supported and the UE expects to receive a Downlink Feedback Indication (DFI) format in a predetermined or configured time window after the CG PUSCH transmission. The DFI provides HARQ-ACK information and may also provide other parameters such as RV, number of repetitions, etc.

[0169] If the UE does not detect a DFI before the end of the window following a CG PUSCH transmission, the UE may assume that the gNB has failed to detect the presence of a CG PUSCH transmission or that the gNB has failed to send a DFI (e.g. due to a Listen Before Talk (LBT) failure in operations utilizing shared spectrum).

[0170] When receiving PDSCH scheduled by DCI format 1_1 or 1_2 in PDCCH with CRC scrambled by C-RNTI, MCS-C-RNTI, CS-RNTI, or when receiving PDSCH scheduled using sps-Config and activated by DCI format 1_1 or 1_2 without corresponding PDCCH transmission, if the UE is configured with pdsch-AggregationFactor, the same symbol allocation applies over pdsch-AggregationFactor consecutive slots. The UE may expect the TB to be repeated within each symbol allocation in each pdsch-AggregationFactor consecutive slots and the PDSCH is limited to a single transport layer. The redundancy version to be applied on the nth transmission opportunity of a TB (where n = 0, 1, ... pdsch-AggregationFactor-1) is determined according to the following table, and for a PDSCH scheduled using sps-Config and activated by DCI format 1_1 or 1_2 without a corresponding PDCCH transmission, the "rv indicated by the DCI scheduling the PDSCH" in Table 1 below id " is assumed to be 0. Redundancy version applied when pdsch-AggregationFactor is present.

[0171] Table 1. Redundancy versions applied when pdsch-AggregationFactor is present

[0172]

[0173] For PUSCH transmissions with type 1 or type 2 configuration grants, the (nominal) number of repetitions K to be applied to the transmitted transport block is provided by the index row in the time domain resource allocation table, if numberofrepetitions exists in the table; otherwise, K is provided by the parameter repK configured by higher layers.

[0174] For PUSCH transmissions of PUSCH repetition type A with type 1 or type 2 configuration grants, the higher layer parameter repK-RV defines the redundancy version pattern to be applied to the repetitions. If the parameter repK-RV is not provided in configuredGrantConfig, the redundancy version used for uplink transmissions with the configured grant may be set to 0. Otherwise, for the nth transmission opportunity (n=1,2,...,K) among the K repetitions, it is associated with the (mod(n-1,4)+1)th value in the configured RV sequence. If the configuration of the configured grant is configured to set Configuredgrantconfig-StartingfromRV0 to "off", the initial transmission of a transport block may only start at the first transmission opportunity of the K repetitions.

[0175] Otherwise, the initial transmission of the transport block may start at: the first transmission opportunity of the K repetitions if the configured RV sequence is {0,2,3,1}; any transmission opportunity associated with RV=0 of the K repetitions if the configured RV sequence is {0,3,0,3}; and / or any transmission opportunity of the K repetitions except the last transmission opportunity when K≥8 if the configured RV sequence is {0,0,0,0}.

[0176] For any RV sequence, the repetitions may terminate after K repetitions have been transmitted, or at the last transmission opportunity among the K repetitions within a period P, or starting from the start symbol of the repetitions overlapping with a PUSCH with the same HARQ process scheduled by DCI format 0_0, 0_1 or 0_2, whichever arrives first. It is not expected that the UE is configured with a duration for the transmission of K repetitions that is greater than the duration derived from the periodicity P. If the UE determines that, for a transmission opportunity, the number of symbols available for PUSCH transmission in a timeslot is less than the transmission duration L, the UE does not transmit PUSCH in the transmission opportunity.

[0177] For both Type 1 and Type 2 PUSCH transmissions with configured grants, the UE may repeat the TB over K consecutive slots applying the same symbol allocation in each slot when K>1. Type 1 or Type 2 PUSCH transmissions with configured grants in a slot are omitted based on the semi-statically configured and / or dynamically indicated SFI for uplink and downlink symbols / slots.

[0178] For PUSCH transmissions of PUSCH repetition type B with type 1 or type 2 configuration grants, the higher layer configured parameter repK-RV defines the redundancy version pattern to be applied to the repetitions. If the parameter repK-RV is not provided in configuredGrantConfig, the redundancy version used for each actual repetition with the configured grant may be set to 0. Otherwise, for the nth transmission opportunity among all actual repetitions (including omitted actual repetitions) out of the K nominal repetitions, it is associated with the (mod(n-1,4)+1)th value in the configured RV sequence. If the configuration of the configuration grant is configured to set Configuredgrantconfig-StartingfromRV0 to "off", the initial transmission of a transport block may start only at the first transmission opportunity of the actual repetition.

[0179] Otherwise, the initial transmission of a transport block may start at: the first transmission opportunity of an actual repetition if the configured RV sequence is {0,2,3,1}; any transmission opportunity of an actual repetition associated with RV=0 if the configured RV sequence is {0,3,0,3}; and / or any transmission opportunity of an actual repetition, except an actual repetition within the last nominal repetition when K≥8, if the configured RV sequence is {0,0,0,0}.

[0180] For any RV sequence, the repetitions may terminate after sending K nominal repetitions, or at the last transmission opportunity among the K nominal repetitions within a period P, or starting from the start symbol of the repetition overlapping with the PUSCH of the same HARQ process scheduled by DCI format 0_0, 0_1 or 0_2, whichever arrives first. It is not expected that the UE is configured to transmit K nominal repetitions for a duration greater than the duration derived from the periodicity P.

[0181] The configuration for SPS PDSCH / CG PUSCH can be cell-specific or BWP-specific, where the UE can be configured with one or more SPS PDSCH / CG PUSCH configurations per cell group / cell / BWP. In the case of multiple configurations, each configuration can be associated with an index for distinguishing a single SPS PDSCH / CG PUSCH configuration or a "state" for indicating a subset (size >= 1) of (multiple) SPS PDSCH / CG PUSCH configurations.

[0182] Throughout this disclosure, for brevity, embodiments are described with respect to SPS PDSCH or CG-PUSCH, but they are also applicable to PDSCH reception, PUSCH transmission scheduled by the corresponding DCI format, and PUCCH / SRS transmission.

[0183] Throughout the present disclosure, the embodiments are also applicable to scenarios where (multiple) gNBs operate with multiple transmit and receive points (multiple TRPs), or where the UE has multiple antenna panels / RF chains.

[0184] Throughout this disclosure, the design principle is to implement dynamic UE behavior for CG PUSCH or SPS PDSCH transmission in order to account for temporal variations of the channel / beam and UE mobility while maintaining the design principle of CG PUSCH / SPS PDSCH, thereby minimizing the use of physical layer signaling, such as for reconfiguration or reactivation for CG / SPS or for scheduling retransmissions using DCI formats. Accordingly, the gNB may provide guidance information about some transmit / receive parameters, such as a possible beam set, or a valid repetition number set, to the UE, and enable the UE to determine the transmit / receive parameters, such as a beam from a possible beam set, or a repetition number from a valid repetition number set, under the guidance of the gNB.

[0185] In one embodiment of enhanced beam management for UL CG, the beam indication set (indication for spatial transmit filters) for CG PUSCH transmission can be separated from the beam indication set for PUSCH transmission scheduled by the DCI format.

[0186] In one example, CG PUSCH (type 1 or type 2) transmission and dynamic PUSCH transmission can be configured with corresponding SRS resource sets, respectively. In another example, the same SRS resource set is used for both CG PUSCH transmission and dynamic PUSCH transmission, and the first subset and the second subset of SRS resources are used for CG PUSCH transmission and for dynamic PUSCH transmission. The first subset and the second subset of SRS resources may have no common elements. The first subset and the second subset of SRS resources may be predetermined in the system specification, or configured by UE common or UE specific high-level signaling, or may be determined based on a formula, such as using the first half of the SRS resource set for the first subset and the second half of the SRS resource set for the second subset. In all examples, when the DCI format for activating CG PUSCH type 2 transmission includes an SRI field, or when the configuration for CG PUSCH type 1 transmission includes SRI, the UE interprets the SRI indication based on the corresponding SRS resource subset. In one example, the beam indication for CG PUSCH type 2 transmission also applies to the first CGPUSCH transmission following the activated DCI format.

[0187] In another example, for non-codebook based PUSCH transmission, CG PUSCH (type 1 or type 2) transmission and dynamic PUSCH transmission may be configured with associated CSI-RS resources or a subset of associated CSI-RS resources, respectively.

[0188] In another example, when the beam indication for PUSCH transmission is based on the TCI state and / or DL ​​reference signal and / or corresponding QCL assumption (such as QCL type D), the CG PUSCH (type 1 or type 2) transmission and the dynamic PUSCH transmission can be respectively configured with the TCI state and / or DL ​​reference signal and / or corresponding QCL assumption (or a set of TCI states and / or DL ​​RS and / or QCL assumptions).

[0189] Throughout this disclosure, the term "beam indication resource" may be defined based on a unified TCI framework for UL and DL beam indication, using the configuration of source / reference RS in the TCI state configuration / definition. "Beam indication resource" is defined as a DL / UL RS resource or a set / group of DL / UL resources for indicating spatial transmit / receive filters for signal / channel transmission, or (multiple) (DL or UL) TCI states or QCL assumptions, or a UL TCI state for UL beam indication, or (multiple) SRS resources or a set of SRS resources, or (multiple) associated CSI-RS resources such as for non-codebook based PUSCH. In one example, for non-periodic / semi-persistent beam indication resources, the spatial transmit / receive filters (also referred to as beams) used for the UE may be updated / overwritten via a DCI format or MAC-CE, and the UE may use the most recently updated beam at each time instance or transmission opportunity.

[0190] In one embodiment of enhanced timing for beam indication for UL CG, beam indication resources (such as an SRS resource set or SRS resources, or associated CSI-RS resources (or associated CSI-RS resource sets), or TCI states (or TCI state sets), or (multiple) (corresponding) QCL assumptions (such as QCL assumption type D)) configured for CG PUSCH transmission (type 1 and / or type 2) may include only (multiple) periodic or semi-persistent resources in the time domain, and are not expected to include (multiple) non-periodic resources.

[0191] In one example, (multiple) non-periodic resources for beam indication for CG PUSCH (type 1 and / or type 2) transmission may also be included, such as an SRS resource set, or SRS resources, or associated CSI-RS resources (or associated CSI-RS resource sets), or TCI states (or TCI state sets / subsets), or (corresponding) QCL assumptions (such as QCL assumption type D).

[0192] According to the enhancement, the beam indication for CG PUSCH (type 1 and / or type 2) transmission in time slot n is associated with the most recent transmission / reception of a beam indication (DL or UL) resource, where the beam indication resource can be one or more of the above examples, and where the beam indication resource transmission is prior to the CG PUSCH transmission timing, possibly additionally offset by the UE processing time.

[0193] In these embodiments, the time offset may be, for example, an application time for beam switching (such as a threshold timeDurationForQCL based on UE capabilities), or a default UE processing time for PUSCH (such as T′ proc，2 or T_proc,2 [3GPP TS 38.213 and TS 38.214]), or UE processing time for UCI multiplexing, etc., or a predetermined or configured time. When a MAC-CE command is used to activate CG PUSCH, the UE processing time offset may also include the MAC-CE application delay.

[0194] In another example, the beam indication resource transmission / reception is preceded by a PDCCH having a DCI format providing an SRI (such as a PDCCH having a DCI format providing activation of a CG PUSCH type 2 transmission). In yet another example, the beam indication resource transmission / reception is preceded by CG PUSCH activation, possibly with an additional offset in UE processing time, such as one or more of the above-mentioned time offsets.

[0195] In one example, the indicated SRI value for a CG PUSCH transmission in slot n is associated with the latest transmission of an SRS resource identified by the SRI, where the SRS resource transmission precedes a CG PUSCH transmission opportunity, possibly additionally offset by UE processing time. The indicated SRI value may be signaled via higher layer RRC signaling for type 1 CG PUSCH, or by activating the SRI field in the DCI format for CG PUSCH transmissions for type 2 CG PUSCH. The benefit of this enhancement is that if the beam / spatial transmit filter used for transmission of periodic / semi-persistent SRS changes at different SRS transmission opportunities, the UL beam used for CG PUSCH transmissions may be updated accordingly.

[0196] In another example, the indicated SRI value in time slot n is associated with a most recent transmission of an SRS resource identified by the SRI value, where the SRS resource (transmission) is preceded by a PDCCH having a DCI format providing the SRI value (i.e., a PDCCH having a DCI format that activates a CG PUSCH transmission, or a PDSCH that provides a MAC-CE command that activates a CG PUSCH transmission).

[0197] In yet another example, the indicated SRI value in time slot n is associated with the latest transmission on the SRS resource identified by the SRI value, where the SRS resource (transmission) is before CG PUSCH activation, possibly further offset by UE processing time, such as before RRC activation of a CGPUSCH type 1 transmission.

[0198] For both codebook-based and non-codebook-based transmissions, the SRI (semi-statically configured to operate in accordance with subclause 6.1.2.3 of [TS 38.214]) for the indication of a PUSCH transmission opportunity in time slot n configured by higher layers is associated with the most recent transmission of the SRS resource(s) identified by the SRI, where the SRS transmission precedes the PUSCH transmission opportunity.

[0199] When the UE applies the beam direction of the DL RS associated with the CG PUSCH or SPS PDSCH, the UE may have different application times of the beam determination for different transmission occasions of the CG PUSCH or SPS PDSCH. Currently, the UE determines the beam direction for CG PUSCH transmission or SPS PDSCH reception immediately before receiving the DCI format or RRC configuration that activates the CG PUSCH or SPS PDSCH, and uses the same beam direction for all future CG PUSCH / SPS PDSCH transmission occasions. This embodiment enables the same configured or activated DL RS to be used for all future transmission occasions, which is the same as the current design, but for each CG PUSCH / SPS PDSCH transmission occasion, the UE may use an updated beam direction based on DL RS reception before each transmission occasion (instead of maintaining the same beam direction used when the CG PUSCH / SPS PDSCH was activated).

[0200] Fig. 6A Example beam management operations 600 for UL CG PUSCH are shown according to an embodiment of the present disclosure. Fig. 6A The illustrated embodiment of beam management operations 600 is for illustration only. Figure 6B Example beam management operations 650 for UL CG PUSCH are shown according to an embodiment of the present disclosure. Figure 6B The illustrated embodiment of beam management operation 650 is for illustration only.

[0201] First describe Fig. 6A and Figure 6B The commonality between. The beam indication for CG PUSCH transmission is provided by example beam indication RS resources (such as SRI, TCI state or QCL assumption), and example implementations in some time instances are shown in 610, 612, 614, 616 and 618. The UE receives an indication to activate CG PUSCH transmission 620 at a certain time. The indication can be provided by higher layer signaling or by DCI format. The configuration for CG PUSCH transmission includes periodic CG PUSCH transmission opportunities 640, 642, 644. The UE transmits at each CG PUSCH transmission opportunity using the provided beam indication.

[0202] Fig. 6A A case is shown where the UE transmits the CG PUSCH with a beam after implementing the beam indication RS resources that occur just before the CG PUSCH activation time (as shown in 610), and uses the same implementation for all transmission opportunities (as shown in 650, 652, 655). Figure 6B In , the UE transmits the CG PUSCH with a beam after implementing the latest beam indication RS resource before the CG PUSCH activation time (as shown in 610), and uses the same implementation for all transmission opportunities 650, 652, 655. Figure 6B In the embodiment, the UE sends the CG PUSCH with a beam after the latest beam indication RS resource before implementing the CG PUSCH transmission timing, and uses beam implementation 612 for CG PUSCH transmission timing #1 660, uses beam implementation 614 for CG PUSCH transmission timing #2 663, and uses beam implementation 618 for CG PUSCH transmission timing #3 666.

[0203] In one example, when (multiple) periodic or semi-persistent resources are configured for beam indication for CG PUSCH type 1 and / or type 2 transmission, the most recent transmission of (multiple) resources refers to the most recent transmission opportunity of the corresponding (multiple) periodic or semi-persistent resources. In another example, when (multiple) non-periodic resources are configured for beam indication for CG PUSCH type 1 and / or type 2 transmission, the most recent transmission of (multiple) resources refers to the most recent transmission opportunity of the corresponding (multiple) resources after receiving a PDCCH in a DCI format that provides a trigger for transmission on the resource, or receiving a predetermined / configured DL RS, etc.

[0204] In one example, when the spatial transmit / receive filters for beam indication resources for CG PUSCH type 1 and / or type 2 transmissions are updated via a DCI format or a MAC-CE command, the most recent transmission of the (multiple) beam indication resources before the CG PUSCH transmission timing or the activation time of the CG PUSCH transmission (possibly additionally offset by a UE processing time offset) refers to a transmission on the (multiple) beam indication resources using the corresponding most recent spatial transmit / receive filters.

[0205] In one example, if DCI format 0_0 or DCI format 0_2 with an SRI field of 0 bits is used to activate CG PUSCH type 2 transmission, the UE needs to use a default beam (spatial filter) for PUSCH transmission, such as a beam used for PUCCH transmission or PDCCH reception in a predetermined or configured CORESET, while considering timing aspects for the default CGPUCCH beam similar to the above solution for the case when the CG PUSCH beam follows an SRS beam or a beam corresponding to a DL RS or TCI state.

[0206] The spatial filter for PUSCH transmission is associated with the most recent transmission or reception of (multiple) reference RSs identified by the spatial relationship, where the reference RS transmission or reception precedes the PDCCH reception providing DCI format 0_0. For PUSCH transmission activated by DCI format 0_0, the spatial relationship at the later PUSCH transmission opportunity is associated with the most recent transmission or reception of (multiple) reference RSs identified by the spatial relationship, where the reference RS transmission or reception precedes the PUSCH transmission opportunity.

[0207] Figure 7 A flow chart of a method 700 for beam determination with enhanced timing for CG PUSCH transmissions according to an embodiment of the present disclosure is shown. Figure 7 The illustrated embodiment of method 700 is for illustration only. Figure 7 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0208] The UE receives configuration and activation for CG PUSCH (type 1 or type 2) transmission. The configuration includes beam indication RS resources, such as SRI or TCI state or QCL assumption (710). Then, for each transmission opportunity of CG PUSCH, the UE determines the latest transmission / reception of the beam indication RS resources before the CG PUSCH transmission opportunity (possibly offset by UE processing time in addition) (720). Accordingly, the UE determines the spatial transmission filter of the CG PUSCH corresponding to the determined latest transmission / reception of the beam indication RS resources (730). Finally, the UE transmits at the CG PUSCH transmission opportunity using the determined spatial transmission filter (740). The UE determines whether the UE has received a release command for the CG PUSCH (such as through a DCI format, MAC-CE or RRC signaling) (750). If the UE does not receive a release command, the UE repeats the same behavior at the next CG PUSCH transmission opportunity starting from 720. If the UE has received a CG PUSCH release command, the UE stops sending CG PUSCH. The UE also provides HARQ-ACK information for CG PUSCH release (760).

[0209] In one embodiment of a CG PUSCH with multiple beam indication resources, the CG PUSCH configuration (type 1 or type 2) may include multiple beam indication resources, such as one or more SRS resource sets, or one or more SRS resources, or one or more associated CSI-RS resources or associated CSI-RS resource sets, or one or more TCI states (or TCI state sets), or one or more (corresponding) QCL assumptions (such as QCL assumption type D), wherein the actual beam / spatial transmit filter used for the CGPUSCH transmission opportunity is based on a selection from the multiple beam indication resources.

[0210] In one example, the UE can improve CG PUSCH reception reliability and coverage by communicating with multiple TRPs. For example, based on the mobility and orientation of the UE, the UE can communicate with one TRP at some transmission opportunities and communicate with another TRP at other transmission opportunities. In addition, the UE can operate with multiple antenna panels and can transmit with beams from different panels. To achieve such operation, the CG PUSCH beams / SRS / UL-TCI corresponding to different TRPs and / or panels can be reconfigured. A set of beams / SRS / UL-TCI can be configured to the UE, and the UE can select one of the beams as the beam for CG PUSCH transmission for a period of time (such as one or more transmission opportunities).

[0211] In one embodiment, for the UE selection method, the actual UL beam / spatial transmit filter is selected based on UE measurements of the configured beam indication resource group (such as, for example, the resource set corresponding to the SRI / TCI state). The benefit is that the UE can autonomously change the spatial filter used for CG PUSCH transmission and typically improve the link quality. In this document, measurement refers to measurement of one or more of the following: Layer 1 / Layer 3 reference signal received power (L1- / L3-RSRP), reference signal received quality (RSRQ), received signal strength indicator (RSSI), signal-to-noise ratio (SNR), signal-to-interference ratio (SINR), capacity, throughput, etc.

[0212] The UE may report to the serving gNB an index of the selected beam indication resource / SRI / TCI status, for example, using a CG-UCI element multiplexed on the CG PUSCH for reporting, or by selecting corresponding CG PUSCH transmission parameters (such as DMRS mode / sequence / port / cyclic shift / scrambling / cover code, etc.) based on a mapping of such CG PUSCH transmission parameters to beam indices predetermined or configured by higher layers.

[0213] In another example, when there is no transmission / reception / measurement of beam indication resources within a time interval greater than a configured or predetermined value so that the old measurements are considered inaccurate, or when the UE does not multiplex CG-UCI on CG PUSCH, a default beam indication resource (such as a default SRI / TCI state with the lowest / highest SRI / TCI state index or a configured default beam indication resource) can be used for CG PUSCH transmission.

[0214] In one embodiment, for the gNB selection method, the activation DCI or MAC-CE command for UL CG Type 2 and / or the reactivation / modification DCI or MAC-CE command for UL CG Type 1 or Type 2 indicates one of multiple SRI / TCIs ​​as the actual beam / spatial transmit filter to be used for UL CG PUSCH.

[0215] In one example, where the gNB decides to change the beam used for the UL CG, a DCI is sent to the UE to release the UL CG and then (later) a subsequent / next activation DCI is sent to activate the UL CG using another beam indication resource / SRI / TCI from a set of multiple configured beam indication resources / SRI / TCIs.

[0216] In another example, a DCI format or MAC-CE command to activate CG PUSCH type 2 transmission indicates one of multiple SRI / TCI states as the actual beam / spatial transmit filter used for CG PUSCH transmission. In one example, when the gNB changes the spatial filter used for CG PUSCH transmission, the gNB may provide a DCI format to the UE to release the CG PUSCH configuration, and subsequently provide an activation DCI format to the UE to activate CG PUSCH with another beam indication resource / SRI / TCI state from the set of configured beam indication resource / SRI / TCI states. In another example, the DCI format or MAC-CE command indicates an update of the beam indication resource / SRI / TCI state while the UE continues to use the CG PUSCH configuration without a previous release. In yet another example, for CG PUSCH type 1 configured with multiple beam indication resources, prior to receiving an updated DCI format or MAC-CE command indicating the beam indication resource / SRI / TCI state, an initial beam indication resource (such as an initial SRI / TCI state) or a configured initial beam indication resource corresponding to the lowest / highest indexed SRI / TCI state may be used for CG PUSCH transmission. In another example, the gNB may indicate the beam / spatial filter used for CG PUSCH transmission by indicating one of the multiple SRI / TCI states as the beam / spatial transmit filter for CG PUSCH transmission. The indication may be based on a preferred beam reported by the UE. The preferred beam may be derived based on multiple CSI reports from the UE for the corresponding multiple configured beam indication resources indicating the quality of the received beam or based on an indication of the preferred receive beam by the UE (e.g., by a CG-UCI multiplexed on the CG PUSCH).

[0217] In one embodiment, for a combination of UE and gNB methods, the UE transmits on CG PUSCH resources using a spatial transmit filter / beam indicated by the gNB (e.g., via a default beam indication resource or a beam indication resource indicated by activating a DCI format or MAC-CE command). When the quality of the beam indication resource indicated by the gNB is below a predetermined / configured threshold based on UE measurements, the UE may switch from multiple configured beam indication resources to another beam (e.g., based on UE measurements of (multiple) alternative beam indication resources and selecting the strongest beam). According to this method, if the UE switches from a beam indicated by the gNB to a new beam, the UE may indicate the new beam to the gNB (e.g., using the options provided in the first method described above). In a related example, a UE configured with multiple beam indication resources may operate using the methods described in the embodiments discussed below.

[0218] Figure 8A flow chart of a method 800 for enhanced beam determination using multiple beams for CG PUSCH transmission according to an embodiment of the present disclosure is shown. Figure 8 The illustrated embodiment of method 800 is for illustration only. Figure 8 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0219] The UE receives configuration and activation for CG PUSCH (type 1 or type 2) transmission including multiple beam indication RS resources (810). The UE then receives an indication from the serving gNB for a beam indication RS resource from the multiple beam indication RS resources to be used as a CG PUSCH beam / spatial filter in a CG PUSCH transmission opportunity (820). The UE applies the beam indication RS resources at each CG PUSCH transmission opportunity to determine the spatial filter for CG PUSCH transmission until the UE receives a new message from the serving gNB. The UE then determines the UE preferred beam based on measurements of the multiple beam indication RS resources for each CG PUSCH transmission opportunity (830). The UE determines whether the UE preferred beam is the same as the beam indicated by the gNB (840). If the UE preferred beam is the same as the beam indicated by the gNB, the UE transmits at the CG PUSCH transmission opportunity using the beam indicated by the gNB (850). If the UE preferred beam is different from the beam indicated by the gNB, the UE indicates the UE preferred beam to the gNB (860). In the first option, the UE transmits on the CG PUSCH transmission opportunity using the beam indicated by the gNB (850). In the second option, the UE transmits on the CG PUSCH transmission opportunity using the beam preferred by the UE (870). The UE determines whether the UE has received a release command from the gNB for the CGPUSCH (880). If the UE has not received a release command, the UE repeats the same behavior at the next CG PUSCH transmission opportunity starting from 820. If the UE has received a CG PUSCH release command, the UE stops the CG PUSCH transmission attempt on the CG PUSCH resources (890). In one example, based on the DAI of previous and future DCI detected by the UE, HARQ-ACK is provided even when the UE has not received a release.

[0220] Enhancements to beam indication and beam management similar to those for CG PUSCH transmissions may be applied to PUCCH transmissions from the UE. For example, multiple beam indication resources for PUCCH resources may be provided to the UE. In a first option, the beam / spatial filter used for PUCCH transmission may be indicated by the gNB (e.g., using a MAC-CE or DCI format). In a second option, the UE may determine the spatial filter used for PUCCH transmission (e.g., based on UE measurements of different PUCCH beam indication resources that may be provided by the higher layer parameter PUCCH-Spatial-Relation-Info), and the UE may then send the PUCCH with the selected PUCCH beam. In a third option, the UE may use the spatial filter for PUCCH transmission indicated by the gNB via a DCI format or MAC-CE command, unless the link quality measured by the UE for the corresponding beam indication RS resource is below a configured or predetermined threshold, and the UE may then select the spatial filter for PUCCH transmission among the configured beam indication resources.

[0221] In one example, regardless of which method is followed for a UL CG configured with multiple beam indication resources (e.g., the first or second or third method described above), if the UE operates with multiple UE antenna panels / RF chains / port groups / transmission entities, etc. for overlapping / simultaneous multi-panel transmissions, then for each UL CG configuration type 1 and / or type 2, the UE may be configured with multiple beams / beam indication resources associated with each UE panel / transmission entity. For example, one or more beam groups or beam indication resource groups may be configured, each beam group corresponding to a beam for a single UE panel / transmission entity, and / or corresponding to a beam for a combination of multiple UE panels / transmission entities, and / or a combination thereof. In this case, the operation of selecting an actual beam for UL CG transmission on each UE panel / transmission entity (e.g., one or more of the first, second, and third methods described above) is performed individually and / or separately for each UE panel / transmission entity, or jointly across all UE panels / transmission entities.

[0222] In one example, if the UE is capable of transmitting from multiple antenna panels or antenna port groups simultaneously, the above method is applicable to each antenna panel or antenna port group.Alternatively, the UE may jointly determine a single spatial filter for CGPUSCH transmission across all UE panels.

[0223] In one embodiment of enhanced beam management and indication for DL ​​SPS, for example in the embodiments of E-1, E-1-1, E-1-2 for CG PUSCH transmission, the enhanced beam management and indication method can also be applied to SPS PDSCH transmission. Some examples are provided below, and more examples can be constructed based on the analogy between SPS PDSCH and CG PUSCH. In this article, the SPS PDSCH can be a traditional SPS PDSCH with an activated DCI format that provides indications for reception parameters (also known as SPS PDSCH type 2), or a new type of SPS PDSCH with higher layer (RRC) signaling that provides indications for corresponding reception parameters (as described earlier in this disclosure, referred to as SPS PDSCH type 1).

[0224] In one example, the beam indication resource set for the SPS PDSCH may be separate from the beam indication resource set for the PDSCH scheduled by the DCI format. In a related example, the beam indication resource for the SPS PDSCH may be a TCI state or a (corresponding) QCL assumption (such as QCL assumption type D), or a DL RS (such as an SSB or CSI-RS resource or a PRS resource), or a UL RS (such as an SRS provided by an RRC configuration or by activating a DCI format) or a MAC-CE command.

[0225] In one embodiment of enhanced timing for beam indication for DL ​​SPS, the beam indication resources configured for the SPS PDSCH (type 1 or type 2) may include only (multiple) periodic or semi-persistent resources in the time domain according to the first option, and may also include (multiple) non-periodic beam indication resources according to the second option. The beam indication received for the SPS PDSCH (type 1 or type 2) in time slot n is associated with the most recent transmission / reception of the beam indication (DL or UL) resource. In the first option, the beam indication resource is sent / received before the SPS PDSCH reception timing, which may be additionally offset by the UE processing time. In the second option, the beam indication resource is sent / received before the reception time of the PDCCH / PDSCH that provides the beam indication (such as activating a DCI format or a MAC-CE command). In the second option, the beam indication resource is sent / received before the CGPUSCH is activated, which may be additionally offset by the UE processing time. The UE processing time offset may be, for example, an application time for beam switching (such as a threshold timeDurationForQCL based on UE capabilities (duration for QCL)), or a default UE processing time T′ for PUSCH proc，2[3GPP TS 38.213 and TS 38.214] etc., or a predetermined / configured time. In addition, in the case of using a MAC-CE command for beam indication, there may be (higher layer) UE processing delay and application time before the MAC-CE command is applied.

[0226] In one example, when (multiple) periodic or semi-persistent resources are used for beam indication for SPS PDSCH type 1 and / or type 2, the most recent transmission of (multiple) resources refers to the most recent transmission opportunity of the corresponding (multiple) periodic or semi-persistent resources. In another example, when (multiple) non-periodic resources are configured for beam indication for SPS PDSCH type 1 and / or type 2, the most recent transmission / reception of (multiple) resources refers to the most recent transmission / reception opportunity of the corresponding (multiple) resources after dynamic triggering of (multiple) resources (such as by DCI format), or reception of a predetermined / configured DL RS, etc.

[0227] In one example, when the spatial transmit / receive filters for beam indication resources (e.g., (multiple) semi-persistent or non-periodic resources) of DL SPS type 1 and / or type 2 are (semi-) dynamically updated / overwritten based on a DCI or MAC-CE command, the most recent transmission / reception of the (multiple) beam indication resources before a certain deadline (such as a DL SPS reception timing and / or a DL SPS activation time) (possibly minus a UE processing time offset) refers to the transmission / reception of the (multiple) beam indication resources using the corresponding most recently updated / overwritten spatial transmit / receive filters before the deadline, wherein any applicable UE processing time offset may also be taken into account, for example, as described in the above examples.

[0228] Fig. 9 A flow chart of a method 900 for beam determination with enhanced timing for SPS PDSCH according to an embodiment of the present disclosure is shown. Fig. 9 The illustrated embodiment of method 900 is for illustration only. Fig. 9 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0229] The UE receives configuration and activation for SPS PDSCH (type 1 or type 2), including configuration and / or indication for beam indication RS resources (such as SRI, TCI, QCL assumptions) (910). Then, for each reception opportunity of SPS PDSCH, the UE determines the most recent transmission / reception of the beam indication RS resources before the SPS PDSCH reception opportunity (possibly offset by the UE processing time in addition) (920). Accordingly, the UE determines the spatial reception filter for SPS PDSCH corresponding to the most recent transmission / reception of the determined beam indication RS resources (930). Finally, the UE receives at the SPS PDSCH reception opportunity using the determined spatial reception filter (940). The UE determines whether the UE has received a release command for the SPS PDSCH (950). If the UE does not receive a release command, the UE repeats the process from 920 for the next SPS PDSCH reception opportunity. If the UE has received the SPS PDSCH release command, the UE stops the SPS PDSCH reception attempt on the SPS PDSCH resource and provides a HARQ-ACK for the SPS PDSCH release (960).

[0230] In one embodiment of a DL SPS PDSCH with multiple beam indication resources, the SPS PDSCH configuration (type 1 or type 2) may include multiple beam indication resources, wherein a beam / spatial receive filter for an SPS PDSCH reception opportunity is based on a selection from the multiple beam indication resources. In one example, an activation DCI format or MAC-CE command for SPS PDSCH type 1 or type 2 indicates one of the multiple beam indication resources as a beam / spatial receive filter for SPS PDSCH reception.

[0231] In another example, for SPS type 1 configured with multiple beam indication resources, after RRC-based activation of the SPS PDSCH type 1 configuration and before the UE receives an update in the first DCI format or MAC-CE command indicating the beam indication resources / TCI state / QCL assumption, an initial beam indication resource such as an initial TCI state or QCL assumption (such as an initial beam indication resource with the lowest / highest indexed TCI state) or the configured initial beam indication resource is used for SPS PDSCH reception.

[0232] In another example, the serving gNB may indicate beam selection for the SPS PDSCH via explicit or implicit indication of the SPS PDSCH beam (such as via multiplexing the selected beam as a control information element with data information in the SPS PDSCH), via a configuration or predetermined linkage of the SPS PDSCH beam to other SPS PDSCH reception parameters (such as DMRS mode / sequence / port / cyclic shift / scrambling / cover code, etc.). The linkage of multiple SPS PDSCH beam indication resources and multiple DMRS characteristics may be predetermined in the system specification, or may be based on a predetermined rule / formula (such as mapping a first configured DMRS characteristic to a first beam indication resource, mapping a second configured DMRS characteristic to a second beam indication resource, etc.), and / or may be configurable via RRC.

[0233] In yet another example, the UE may provide to the gNB its preferred receive beam for the SPS PDSCH (e.g., based on UE measurements of a plurality of configured beam indication resources), wherein the UE indication of the preferred beam may be implicit (such as by providing a CSI report for a plurality of configured beam indication resources indicating receive beam quality at the UE), or explicit (such as by providing an indication of the preferred receive beam, for example, by multiplexing the indication in a PUCCH transmission with HARQ-ACK information or a CSI report).

[0234] In another example, the UE receives the SPS PDSCH using the spatial receive filter / beam indicated by the beam indication resource indicated by the gNB (e.g., by activating a DCI format or MAC-CE command). The UE may provide the gNB with a preferred receive beam when the link quality of the beam indicated by the gNB is below a configured threshold based on measurements of one or more of the following: L1- / L3-RSRP, RSRQ, RSSI, SNR, SINR, capacity, throughput, etc. In a related example, a UE configured with multiple beam indication resources may operate using a beam failure recovery method, as described in the embodiments discussed below.

[0235] Fig.10 A flow chart of a method 1000 for enhanced beam determination using multiple beams for SPS PDSCH according to an embodiment of the present disclosure is shown. Fig.10 The illustrated embodiment of method 1000 is for illustration only. Fig.10 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0236] The UE receives configuration and activation for SPS PDSCH (type 1 or type 2) including multiple beam indicator RS resources from the serving gNB (1010). The UE then receives an indication from the gNB for beam indicator RS resources from the multiple beam indicator resources to use as SPS PDSCH beams in SPS PDSCH reception opportunities (1020). The UE may use the beam indicator RS resources for more than one SPS PDSCH reception opportunity until the UE receives new beam indicator RS resources from the gNB.

[0237] Then, for each SPS PDSCH reception opportunity, the UE determines the UE preferred beam based on the measurement of multiple beam indication RS resources (1030). The UE determines whether the UE preferred beam is the same as the beam indicated by the gNB (1040). If the UE preferred beam is the same as the beam indicated by the gNB, the UE uses the beam indicated by the gNB to receive at the SPS PDSCH reception opportunity (1050). If the UE preferred beam is different from the beam indicated by the gNB, the UE indicates the UE preferred beam to the gNB (1060), and the UE uses the beam indicated by the gNB to receive at the SPS PDSCH reception opportunity (1050). The UE determines whether the UE has received a release command for the SPS PDSCH (1070). If the UE has not received a release command, the UE repeats the same behavior starting from 1020 at the next SPS reception opportunity. If the UE has received the SPS PDSCH release command, the UE stops the PDSCH reception attempt on the SPS PDSCH resources and provides a HARQ-ACK for the SPS PDSCH release (1080).

[0238] In one example, similar enhancements to beam management and beam indication for SPS PDSCH reception may be applied to PUCCH transmissions. For example, the selection of beam / spatial filter for PUCCH transmission may be indicated by the serving gNB via a MAC-CE or DCI format. For example, the selection of beam / spatial filter for PUCCH transmission may be determined by the UE (e.g., based on UE measurements of different PUCCH beam indication resources configured by higher layers). For example, the PUCCH beam / spatial filter selection may be indicated in a DCI format that triggers the PUCCH transmission or via a MAC-CE command from a gNB as a baseline, unless the quality of the beam / spatial filter indicated by the gNB is below a threshold, then the UE may select the PUCCH beam based on measurements of the PUCCH beam indication resources.

[0239] In one example, if the UE is capable of receiving from multiple antenna panels or antenna port groups simultaneously, the above method is applicable to each antenna panel or antenna port group. Alternatively, the UE can jointly determine a single spatial filter for SPS D SCH transmission across all UE panels.

[0240] In one embodiment, for a UE configured for CG PUSCH / SPS PDSCH transmission / reception using a current spatial transmit / receive spatial filter (beam), where the UE determines that the link quality of the current spatial transmit / receive spatial filter (beam) is less than a predetermined or configured threshold, the UE may replace the current spatial filter with a new spatial filter (if any) whose link quality the UE determines is greater than or equal to the threshold. The benefit is that the UE is able to continue using CG PUSCH / SPS PDSCH resources even after the current spatial filter fails. This benefit may be achieved with reduced overhead (such as without associated gNB signaling) according to the solution provided below.

[0241] According to this embodiment, when a CG PUSCH / SPS PDSCH configuration including one or more beam indication resources is provided to the UE, and (a) a subset of (multiple) beam indication resources is determined to have a radio link quality less than a predetermined / configured threshold, or (b) a subset of (multiple) beam indication resources has the same QCL attribute (such as QCL type D) as a DL RS or DL ​​RS that the UE monitors for a link failure recovery process and is determined to have a radio link quality less than a predetermined / configured threshold, or has the same RS index, the UE does not expect to use the subset of (multiple) beam indication resources for CG PUSCH transmission / SPS PDSCH reception. In one option, the UE uses other remaining beam indication resources, if any. In another option, the UE determines new beam indication resources based on the link failure recovery process or based on a new link failure process for the CG PUSCH / SPS PDSCH. In a related example, the new beam indication resource is a new candidate beam from multiple beam indication resources having a radio link quality less than or equal to a predetermined / configured threshold. In one example, compared to conventional BFR operation, separate Q_in / Q_out thresholds or separate CSI-RS for measurement may be configured.

[0242] In the present disclosure, the beam indication resource for CG PUSCH / SPS PDSCH may be one or more of the following: (multiple) SRS resource sets, (multiple) SRS resources, (multiple) (associated) CSI-RS resources or (associated) CSI-RS resource sets, (multiple) TCI states or TCI state sets, (multiple) (corresponding) QCL assumptions (such as QCL assumption type D), DL RS (such as (multiple) SSB resources or CSI-RS resources or PRS resources). The spatial transmit / receive filter for the beam indication resource may be provided by RRC signaling and may be updated by activating a DCI format or a MAC-CE command. In addition, in this document, measurement refers to measurement of one or more of the following: L1- / L3-RSRP, RSRQ, RSSI, SNR, SINR, capacity, throughput, etc.

[0243] In another example, when the UE determines that some beam indication resources used for CG PUSCH / SPS PDSCH are detected to have failed (or are about to fail) or have a link quality less than a predetermined / configured threshold, or when some beam indication resources have the same QCL attributes (such as QCL type D) or the same RS index as the DL RS or DL ​​RS monitored by the UE for the link failure recovery process, the UE expects to activate a DCI or MAC-CE command to indicate a new beam.

[0244] In another example, the UE does not expect to use a beam subset with a link quality less than a predetermined threshold to send CGPUSCH / receive SPS PDSCH until the UE receives an activation DCI format or MAC-CE command, or completes link failure recovery (a process of replacing a beam subset with a new beam with a link quality greater than or equal to a predetermined / configured threshold). In one example, the UE is not expected to use (multiple) beam indication resources to send CG PUSCH / receive SPS PDSCH, which the UE determines have a link quality less than a predetermined / configured threshold, or have the same QCL attributes (such as QCL type D) as (multiple) DL RS or UL RS that the UE monitors for the link failure recovery process and which the UE determines has a link quality less than a predetermined / configured threshold, or have the same RS index. In another example, after the UE determines that the beam has a link quality less than a predetermined / configured threshold, after a predetermined / configured number of symbols [N] (e.g., N=0 or N=14 or N=28), the UE is expected to stop using the beam with a link quality less than the predetermined / configured threshold to send CG PUSCH / receive SPS PDSCH, where the SCS configuration used for [N] symbols is the smallest of the SCS configuration of the active DL BWP used for PDCCH reception during / after the link recovery process and the SCS configuration of the (multiple) active DL BWP of the (multiple) serving cells.

[0245] Fig.11 A flow chart of a method 1100 of a similar process for beam failure recovery of CG PUSCH / SPS PDSCH according to an embodiment of the present disclosure is shown. Fig.11 The illustrated embodiment of method 1100 is for illustration only. Fig.11 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0246] The UE receives a configuration and activation for a CG PUSCH or SPS PDSCH (type 1 or type 2) including one or more beam indication RS resources (1110). The UE then checks (based on a predetermined metric, such as L1-RSRP) whether all beam indication RS resources have failed (1120). If not, the UE continues to use the CG PUSCH / SPS PDSCH resources using one or some valid beams (e.g., based on gNB indication and / or UE selection) (1130). However, if all beam indication RS resources have failed, the UE checks whether a release command for the CG PUSCH / SPS PDSCH has been received (possibly after a certain time offset) or whether a gNB indication regarding an alternative beam has been received (1140).

[0247] If yes, the UE releases the CG PUSCH / SPS PDSCH resources, or the UE continues to use the CG PUSCH / SPS PDSCH resources with the alternative beam indicated by the gNB, respectively (1150). However, if the UE receives neither a release command for the CG PUSCH / SPS PDSCH nor a gNB indication about the alternative beam, the UE determines the alternative beam using measurements on the new candidate beam (1160). Next, the UE indicates the determined alternative beam to the gNB (1170). Finally, the UE continues to use the CG PUSCH / SPS PDSCH using the determined alternative beam (1180). (Note that operations 1170 and 1180 can be performed in a single step / action).

[0248] In one example, when all beam indication resources for a UL CG / DL SPS configuration for a UE fail (or are about to fail) and / or are QCL (e.g., QCL type D) and / or have the same RS index as (multiple) DL or UL RS that are monitored for a link failure recovery (also known as BFR) procedure and detected to have failed (or are about to fail), then the UE is expected to (autonomously) release the UL CG / DL SPS configuration even if no DCI or MAC-CE command indicating UL CG / DL SPS release is received (or after the UE does not receive a DCI or MAC-CE command indicating UL CG / DL SPS release after [N'] symbols or time units from the aforementioned beam failure detection). In the case of a DCI or MAC-CE command for SPS release, where N'≥0), it may be the case unless the UE receives a reactivation / modification DCI or MAC-CE command indicating a new alternative beam after [N"] symbols or time units from the preceding beam failure detection, where N"≥0 and N"≤N'. In a related example, when the UE (autonomously) releases the UL CG / DL SPS configuration due to failure of all configured beam indication resources, the UE provides an indication to the gNB.

[0249] In one example, at least some of the above procedures apply at least when the beam indication resources used for UL / DL SPS are periodic in time.

[0250] In one example, when the "failed" CG PUSCH beam is not among the beams that the UE is configured to measure for BFR detection, but is QCL with the beam monitored for the failed BFR detection, such as when the CG PUSCH beam is narrow and the BFR detection beam is wide and covers the CG PUSCH beam, then the UE replaces any beams, including any CG PUSCH beam that is QCL with the failed BFR beam, with a new candidate BFR beam q_0 until the gNB provides an indication of new beams (including beams for CG PUSCH).

[0251] In one example, when the "failed" CG PUSCH beam is not among the beams monitored for BFR detection, but is QCL with the beams monitored for BFR detection that did not fail, such as when the CG PUSCH beam is narrow and fails but the BFR detection beam is wide and does not fail, or if the "failed" CG PUSCH beam is not QCL with any beam monitored for BFR detection, the UE does not send CG PUSCH on the failed beam until the gNB provides an indication of a new beam for CG PUSCH. If the gNB does not provide a new beam for CG PUSCH within the configured time window, the UE may also be allowed to autonomously release the CG PUSCH (e.g., by configuration from the gNB), or the UE may be allowed to initiate a BFR procedure for the CG PUSCH beam.

[0252] In one embodiment of an enhanced repetition mechanism for UL CG, the UE performs UL CG transmission with a repetition number [K], where the UE can determine different repetition numbers [K] for different transmission occasions of the UL CG (for example, based on UE measurements of the corresponding reference signal and possibly within a valid number range for the repetition number [K] indicated by the gNB).

[0253] In the traditional UL CG repetition method, the number of repetitions is semi-statically RRC configured for UL CG type 1, or indicated in the activation DCI for UL CG type 2; and once either method is indicated, either method can be applied to all transmission opportunities of the UL CG (until the UL CG is released / deactivated by DCI or MAC-CE command release, and / or until the UL CG transmission parameters are reactivated / modified by DCI or MAC-CE command update).

[0254] Furthermore, according to (multiple) conventional UL CG repetition methods, in typical cases where beam / channel conditions vary over time, it is of course possible to keep deactivating / releasing / modifying the UL CG with an inappropriate / outdated repetition number value and then (re)activate the UL CG again with an appropriately updated / modified repetition number value. Furthermore, in the case where the gNB detects a UL CG transmission (e.g., detects DMRS) but the gNB cannot successfully decode the (multiple) TBs in the CG PUSCH, the gNB may schedule a retransmission to send a DCI even with the configured repetition number, or may send a HARQ-NACK, for example, in a DFI that may additionally include an adjustment to the repetition number. Thus, this conventional method of UL CG repetition requires a (potentially significant) overhead to schedule retransmissions or provide HARQ feedback or even release the UL CG configuration.

[0255] In one example, the first number of repetitions and the second number of repetitions corresponding to the first spatial transmit filter or beam and the second spatial transmit filter or beam are provided by the gNB (such as, for example, by activating one or both fields in the DCI format of CG PUSCH type 2 or the RRC configuration for CG PUSCH type 1).

[0256] The benefit of this embodiment is that it has a variable / dynamic change to the number of repetitions of the UL CG PUSCH similar to the dynamic (DCI-based) PUSCH - with little / no additional control overhead and even with saved signaling overhead, where each dynamically scheduled transmission follows the scheduling DCI to determine the number of repetitions. Therefore, this is an enhancement to the traditional method of UL CG repetitions. By allowing the UE to autonomously determine the number of repetitions for the UL CG, the provided enhancement avoids most of the aforementioned signaling / control overhead for updating the UL CG repetition number based on beam / link / channel conditions.

[0257] Furthermore, this embodiment provides the gNB with the flexibility to use any resources already reserved for UL CG transmissions (now indicated as idle and available based on this embodiment) for scheduling other UL / DL transmissions for the same UE and / or (multiple) other UEs, thereby improving resource efficiency.

[0258] According to this embodiment, for UL CG configuration, the UE is configured by RRC with a maximum number of repetitions [K_max] and a minimum / typical number of repetitions [K_min], where the maximum number of repetitions [K_max] corresponds to the maximum resource reservation made by the gNB for the UE's UL CG transmission so that conflicts with other DL / UL transmissions can be avoided, and the minimum / typical number of repetitions [K_min] corresponds to the minimum resource reservation to ensure minimum / nominal / typical reliability performance (e.g., initial BLER before HARQ retransmission).

[0259] In one example, a set of values ​​(possibly from a predetermined superset of values) is RRC configured for each of [K_max] and [K_min], respectively, and then the activation / reactivation / modification DCI or MAC-CE command provides the actual selected value from the set of RRC configured sets. In another example, for UL CG transmission opportunities, the UE may be configured with a step size parameter [step_K] for the set of allowed repetition times selected by the UE, for example, in the case of K_min=2 and K_max=8 and step_K=2, the set of allowed repetition times selected by the UE is {2,4,6,8}, and in the case of step_K=1, the set of allowed repetition times selected by the UE is {2,3,4,5,6,7,8}. These parameters provide guidance from the gNB on how to allow the UE to select the actual number of UL CG repetitions.

[0260] In one example, instead of two RRC configuration parameters [K_max] and [K_min], the UE is configured with only a single RRC configuration parameter [K] together with a scaling factor (e.g., [scale_K]), wherein, in one option, the RRC configured [K] actually captures the minimum / typical UL CG repetition number, and the scaling factor provides a factor that allows the UE to increase the UL CG repetition number, for example, [scale_K] is RRC configured from a predetermined set such as {1, 1.2, 1.25, 1.5, 1.75, 1.8, 2, 2.5, 3, 4} or a subset / variant thereof, and in another option, the RRC configured [K] actually captures the maximum UL CG repetition number, and the scaling factor provides a ratio or percentage that allows the UE to reduce the UL CG repetition number, for example, [scale_K] is RRC configured from a predetermined set such as {1, 0.9, 0.8, 0.75, 0.6, 0.5, 0.4, 0.3, 0.25} or a subset / variant thereof.

[0261] In both options of the above examples, it is always assumed that the product of [K] and [scale_K] produces an integer value, otherwise rounding / flooring / ceiling operations are used. In one example, a set of values ​​(possibly from a predetermined superset of values) is RRC configured for each of [K] and [scale_K] separately, and then the activation / reactivation / modification DCI or MAC-CE command provides the actual selection of a value from the set of RRC configured sets. The scaling factor parameter provides guidance from the gNB on how to allow the UE to select the actual number of UL CG repetitions.

[0262] Fig.12 Example operations 1200 are shown for an enhanced repetition scheme for CG PUSCH in accordance with an embodiment of the present disclosure. Fig.12 The illustrated embodiment of operation 1200 is for illustration only.

[0263] In this embodiment, the UE receives (e.g., via DCI or MAC-CE or RRC) an activation command (1210) for a CG PUSCH configuration, together with a configuration / indication for the allowed number of repetitions, e.g., {1, 2, 4}. Each CG transmission opportunity corresponds to a (same or different) beam / beam indication RS resource with a corresponding channel / beam quality measurement (e.g., L1-RSRP). For example, the CG PUSCH beam has low quality for transmission opportunity #1, as shown in light gray in 1220, high quality for transmission opportunity #2, as shown in dark gray in 1222, and medium quality for transmission opportunity #3, as shown in medium gray in 1224. Accordingly, the UE determines a larger number of repetitions (=4) for transmission opportunity #1, as shown in 1230, a smaller number of repetitions (=1) for transmission opportunity #2, as shown in 1232, and a medium number of repetitions (=2) for transmission opportunity #3, as shown in 1234.

[0264] Fig.13 A flow chart of a method 1300 for an enhanced repetition scheme for CG PUSCH according to an embodiment of the present disclosure is shown. Fig.13 The illustrated embodiment of method 1300 is for illustration only. Fig.13 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0265] The UE receives (e.g., via DCI or MAC-CE or RRC) configuration and activation for CGPUSCH (type 1 or type 2) including (multiple) beam indication RS resources (1310). The UE receives an indication of a set / range of allowed values ​​for the number of CG PUSCH repetitions (e.g., RRC or DCI signaling) (1320). The UE then measures the (multiple) beam indication RS resources (1330). Next, the UE determines the number of repetitions for the CG PUSCH transmission opportunity based on the UE measurements (1340). Accordingly, the UE transmits at the CG PUSCH transmission opportunity with the determined number of repetitions (1350). The UE checks whether the UE has received a release command for the CG PUSCH (e.g., DCI or MAC-CE or RRC) (1360). If not, the UE moves to the next CGPUSCH transmission opportunity and repeats the same behavior starting from 1330. If the UE has received a CG PUSCH release command, the UE stops PUSCH transmission attempts on CG PUSCH resources and provides a HARQ-ACK for CG PUSCH release (1370).

[0266] In one example, the UE is configured with only a single RRC parameter for the UL CG repetition number [K], or a list of values ​​for the single RRC parameter for the UL CG repetition number [K] (possibly from a determined set of values), and a single UL CG repetition number [K] from the configured list of values ​​is indicated via an activation / reactivation / modification DCI or MAC-CE command. According to this example, parameter [K] captures the maximum UL CG repetition number or the minimum / typical UL CG repetition number, the selection of which is explicitly predetermined in the system specification, or by an indication in the UL CG configuration in the RRC and / or via a MAC-CE command and / or in an activation / reactivation / modification DCI.

[0267] According to this example, there is no indication of a scaling factor such as [scale-K] to provide explicit guidance from the gNB to the UE on how to select the actual number of UL CG repetitions. Therefore, the resource reservation / allocation for UL CG repetition is transparent to the UE and is based on the gNB implementation.

[0268] In one example, when the configured parameter [K] captures the maximum UL CG repetition number, this may imply that the gNB has reserved a corresponding number of resources for UL CG repetitions, and while the UE is allowed to select any number of repetitions not exceeding the configured value, a very aggressive reduction in the UL CG repetition number compared to the configured value increases the risk of the UL CG being missed (detected and / or) decoded by the gNB, especially when the UL CG resources are shared with other UEs - in which case the gNB may indicate a failure of UL CG transmission and / or a request for a retransmission of a failed UL CG transmission (using, for example, a rescheduling DCI, possibly together with an indication of the actual / minimum / maximum number of repetitions for retransmissions, or a DFI providing HARQ ACK / NACK feedback, possibly together with an indication of the actual / minimum / maximum number of repetitions for retransmissions).

[0269] In another example, when the configured parameter [K] captures the minimum / typical number of UL CG repetitions, it may imply that the gNB has reserved at least a corresponding number of resources for UL CG repetitions (the maximum number of resources may be a gNB implementation issue and transparent to the UE), and while the UE is allowed to select any number of repetitions not lower / not less than the configured value, any (significant) increase in the number of UL CG repetitions compared to the configured value increases the chance of collisions with other (scheduled / configured) UL transmissions and / or DL ​​receptions from other UEs at the gNB, thereby discarding the colliding transmissions from that UE and rendering the colliding repetitions useless. While this is generally not harmful from the UE's perspective (except perhaps for power saving / power consumption considerations) - and potentially useful in cases where there are no / few collisions - from the gNB's perspective, colliding transmissions may be harmful because the colliding transmissions generate undesirable interference. In one example, the UE may be configured with a (maximum / minimum) number of slots for CG transmissions, and the UE may determine the nominal or actual number of repetitions (such as Type A or Type B repetitions) based on the configured number of slots.

[0270] In one example, the UE may be configured with a coverage recovery or coverage enhancement (CE) mode or level (such as CE mode {A, B} or CE level {0,1} or CE level {0,1,2,3}), for example for NR light applications or for coverage enhancement use cases, in which case the CE level / mode may be configured or indicated to the UE, and the mapping between the measurement range (e.g., L1-RSRP range) and the configured repetition parameter [K] (and / or parameters [K_min], [K_max], [scale_K], [step_K]) may be the same or different for different CE modes / levels. In a related example, if the UE is at a lower power level, the measurement results need to be adjusted relative to the UE power level, and a modified measurement (such as a modified L1-RSRP range) needs to be used to determine the configured number of repetitions [K] (and / or parameters [K_min], [K_max], [scale_K], [step_K]) and the number of repetitions [K_occ] selected by the UE for the UL CG transmission opportunity. In another example, when more than one CE mode or level is defined, the number of repetitions for the CE mode may be a multiple of the value of the number of repetitions in the baseline or normal coverage mode / level, where the multiple may be a predetermined factor in the system specification or a value provided to the UE by a higher layer. In yet another example, a default number of repetitions for each CE mode / level may be provided to the UE.

[0271] In one example, any UE-selected increase / decrease in the number of repetitions for the UL CG transmission opportunity compared to the maximum / minimum / typical number of UL CG repetitions indicated by the gNB is not expected to conflict with dynamically scheduled and / or configured UL transmissions and / or DL ​​receptions of the same UE on the same serving cell / carrier / BWP and / or different serving cells / carriers / BWP. For example, it is not expected that the UE selects a repetition number for the UL CG transmission opportunity that would result in a conflict with another UL CG transmission and / or DL ​​SPS reception.

[0272] In another example, when the UE receives a scheduling indication (such as a DCI format) for an UL transmission and / or DL ​​reception (at least on the same serving cell / carrier / BWP) that will overlap with a UL CG transmission opportunity when transmitted based on a previously UE-selected (e.g., larger) UL CG repetition number, the UE is expected to stop / discard / cancel any overlapping / colliding repetitions of the UL CG transmission opportunity. In yet another example, if a priority level is associated with the UL transmission and / or DL ​​reception (explicit priority configuration / indication in RRC or DCI and / or implicit priority assignment such as a predetermined priority list in the system specification, for example, priority sorting for transmit power reduction regarding UL carrier aggregation power control and / or priority level for UCI multiplexing and / or any predetermined / configured priority linking with UE transmission settings such as RNTI), the UE is allowed to continue transmitting with the previously UE-selected repetition number for the UL CG transmission opportunity when the (potentially) overlapping / colliding UL transmission and / or DL ​​reception has a lower (or the same) priority level.

[0273] In one example, when some repetitions of UL CG transmission opportunities (including, for example, any (additional) UL CG repetitions (selected by the UE) compared to the configured minimum / typical ULCG repetitions) (potentially) overlap / conflict with other UL transmissions, then in one option, the UE is expected to maintain the same uplink transmit power for all repetitions of the UL CG transmission opportunities (including any (additional) repetitions of the UL CG transmission opportunities that (potentially) overlap / conflict with other UL transmissions), while in another option, the UE may apply different uplink transmit powers for different repetitions of the UL CG transmission opportunities (at least for any (additional) repetitions of the UL CG transmission opportunities (selected by the UE) that (potentially) overlap / conflict with other UL transmissions), where the power change may follow the priority sorting rules for transmit power reduction with respect to UL carrier aggregation power control (e.g. developed in [3GPP TS 38.213 Clause 7.5]). In the latter option, to handle / solve the phase continuity issue, either additional / separate DMRS is used for (additional) repetitions of UL CG transmission opportunities (selected by the UE), and / or the handling is left to UE implementation and / or gNB implementation.

[0274] In one example, repetitions of UL CG transmission opportunities occur in (valid) UL slots / symbols, either continuously in time or with predetermined or configured gaps in the time domain. UL CG repetitions may be slot-based (also referred to as repetition type A), or may have a shorter duration / periodicity (also referred to as repetition type B), e.g., multiple symbols in only a portion of a slot (e.g., in the form of "mini-slots," "multi-segmentation," and / or across slot boundaries).

[0275] In one example, the UE may receive an indication for an active slot (and / or symbol) (such as an NR light active slot, etc.), where repetition (and transmission / reception) is allowed only in the indicated active slot. The indication for the active slot / symbol may be cell-specific and indicated via SIB, or may be UE-specific and provided via RRC configuration or dynamic DCI indication (such as a group DCI format).

[0276] In one example, for TDD operation, the configured or indicated maximum / minimum / typical UL CG repetition number and / or the UE-selected repetition number for the UL CG transmission opportunity may represent a nominal or actual number of repetitions. For example, when a potential UL CG repetition conflicts / overlaps with a semi-statically configured and / or dynamically indicated DL (and / or flexible) time slot / symbol and / or an invalid time slot / symbol, then in one option, the UE is expected to skip the corresponding UL CG repetition, but count the UL CG repetition in the UL CG repetition number (i.e., the actual number of repetitions sent for the UL CG transmission opportunity may be strictly less than the number of repetitions selected by the UE), while in another option, the UE is expected to skip the corresponding UL CG repetition, but not count the UL CG repetition in the UL CG repetition number, and make further attempts until the actual number of repetitions sent for the UL CG transmission opportunity is equal to the number of repetitions selected by the UE (unless some UL CG repetitions are expected to be dropped / stopped / canceled due to other reasons (e.g., conflicts with other DL / UL transmissions as described above)).

[0277] In one embodiment of a method for a UE to determine a UL CG repetition number, the UE may use reference signal measurements to select / determine different repetition numbers [K_occ] for different transmission opportunities of the UL CG.

[0278] According to this embodiment, when the UE is configured / indicated a single beam indication RS (such as SRI or TCI) for UL CG transmission, and at least when the beam indication RS is periodic (and / or semi-persistent), the UE can determine the number of repetitions [K_occ] for the UL CG transmission opportunity as an adjustment to the configured maximum / minimum / typical number of repetitions [K] for the UL CG, where the adjustment level is based on measurements of the beam indication RS.

[0279] In one example, there is a mapping between a measurement range (e.g., an L1-RSRP range) and an adjustment level, for example, a first RSRP range is mapped to a first ratio / factor of a configured number of repetitions [K], and a second RSRP range is mapped to a second ratio / factor of a configured number of repetitions [K]. In this document, the measurement may be based on L1- / L3-RSRP, RSRQ, RSSI, SNR, SINR, capacity, throughput, etc. In this document, when the beam indication RS is an uplink RS, the corresponding downlink RS is used for the measurement, for example, a DL RS provided as spatial transmission relationship information for the uplink beam indication RS and / or QCL (e.g., QCL type D) with the uplink beam indication RS. In this document, the measurement range (such as the L1-RSRP range) may be predetermined in the system specification, or may be RRC configured, or may be derived based on a specific rule / formula (e.g., in a predetermined format and based on an initial value and / or step size configured by RRC and / or indicated by DCI), while in another option, some or all details of the measurement range and / or adjustment level may be left to the UE for implementation.

[0280] In one example, the gNB may indicate a TCI state / RS different from the UL CG beam indication RS for measuring and determining the number of repetitions [K_occ] for UL CG transmission opportunities. In one example, the UE may be configured with a coverage recovery or CE mode or level (such as CE mode {A,B} or CE level {0,1} or CE level {0,1,2,3}), for example for NR light applications or for coverage enhancement use cases, in which case the CE level / mode may be configured or indicated to the UE, and the mapping between the measurement range (e.g., L1-RSRP range) and the adjustment level of the configured number of repetitions [K] may be the same or different for different CE modes / levels. In a related example, if the UE is at a lower power level, the measurement needs to be adjusted relative to the UE power level, and a modified measurement (such as a modified L1-RSRP range) needs to be used to determine the adjustment level for the configured number of repetitions [K] and to determine the number of repetitions [K_occ] for UL CG transmission opportunities.

[0281] According to this embodiment, when the UE is configured with multiple beam indication RSs (such as multiple SRIs and / or TCIs) for UL CG transmission, or when the UE is configured with one or more beam indication RSs and (multiple) additional DL RSs for measurement (such as (multiple) TCI states), the UE can determine the number of repetitions [K_occ] for the UL CG transmission opportunity as an adjustment to the configured maximum / minimum / typical number of repetitions [K] for the UL CG, where the adjustment level is based on measurements of the (multiple) beam indication RSs and / or (multiple) additional measurement DL RS / TCI states.

[0282] In one example, the UE determines the number of repetitions [K_occ] for the UL CG transmission opportunity based only on a single beam indication / measurement RS (e.g., using the L1-RSRP range as described above), where, for example, the single RS is selected using the method described in the aforementioned embodiment. In another example, the UE determines an aggregate measurement (e.g., from the average / minimum / maximum value (or other function / combination thereof) of some / all measurements of some / all beam indication / measurement RSs) and then uses the aggregate measurement to determine an adjustment level to determine the number of repetitions [K_occ] for the UL CG transmission opportunity.

[0283] In yet another example, when each beam indication / measurement RS is considered separately / individually, the UE determines the number of repetitions [K_occ] for the UL CG transmission opportunity based on the average / minimum / maximum value (or other functions / combinations thereof) of the corresponding number of repetitions [K_occ]. In another example, the UE sends all repetitions of the UL CG transmission opportunity with the same beam / spatial transmit filter or with different beam / spatial transmit filters.

[0284] In one example, when the UE sends repetitions of UL CG transmission opportunities with different beams (e.g., 2 or 4 beams), then in one option, the UE may send the same number of repetitions with each beam (e.g., [K_occ] / 2 or [K_occ] / 4, where a single [K_occ] is determined, for example, using one of the methods previously described), or in another option, the UE may send a different number of repetitions with each beam (e.g., a first [K_occ] for a first transmit beam and a second [K_occ] for a second transmit beam, and so on, where each [K_occ] corresponds to one or more beam indication / measurement RSs), for example, sending a larger number of repetitions using a stronger beam and sending a smaller number of repetitions using a weaker beam.

[0285] In another example, the first transmit beam may correspond to a first CE level / mode (e.g., because the measurement / L1-RSRP for the first beam falls within a first range), and the second transmit beam may be at a second CE level / mode (e.g., because the measurement / L1-RSRP for the second beam falls within a second range), and therefore, the first transmit beam and the second transmit beam may follow different rules / tables to determine the corresponding adjustment levels for the number of repetitions. When UL CG transmission opportunities are transmitted using multiple beams, the order of beams used to transmit different repetitions may be predetermined (e.g., beam cycling (e.g., from the lowest beam / RS index to the highest beam / RS index, and vice versa), for example, based on beam quality (e.g., from the strongest beam to the weakest beam), etc.) or may be configured by RRC or may be indicated by an activation / reactivation / modification DCI or MAC-CE command.

[0286] Fig.14 A flowchart of a method 1400 for a UE to determine the number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown. Fig.14 The illustrated embodiment of method 1400 is for illustration only. Fig.14 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0287] The UE receives a configuration and activation for a CG PUSCH (type 1 or type 2) including (multiple) beam indication RS resources (1410). The UE also receives a mapping between an L1-RSRP range and a set / range of allowed values ​​for the number of CG PUSCH repetitions (1420). Then, for each CG transmission opportunity, the UE measures the (multiple) beam indication RS resources and determines the L1-RSRP range (1430) (e.g., by combining measurements corresponding to multiple beam indication RS resources). The UE then checks whether the UE has a non-default UE power class (e.g., less than 23dBm) and / or whether the UE is operating in CE mode / level (1440). If not, the UE determines the number of repetitions for the CG PUSCH transmission opportunity based on the determined L1-RSRP range and the received mapping (1460). However, if the UE has a non-default UE power class (e.g., less than 23 dBm) and / or operates in a CE mode / level, the UE determines a modified L1-RSRP range (1450) based on the UE power class and / or CE mode / level, and then moves to step 1460 to determine the number of repetitions for the CG PUSCH transmission.

[0288] In one example, autonomous UE actions for selecting beams or number of repetitions, etc. may be constrained. For example, the UE may be configured with restrictions on how often the UE may change selection for beams or for number of repetitions using timer(s) or counters, or the UE may be configured with a threshold for minimum RSRP change before the UE may change the gNB configuration of the corresponding parameter. The UE may also inform the gNB of the preferred change.

[0289] In one example, the UE transmits a second number of repetitions corresponding to a second spatial transmit filter (or beam) at a time offset after a first number of repetitions corresponding to a first spatial transmit filter or beam, wherein the time offset may be configured / indicated by the network, or may be determined by the UE based on a UE processing time, such as an application time for beam switching, such as a threshold timeDurationForQCL based on UE capabilities, or a default UE processing time T' for PUSCH determined for a PHR type. _proc,2 (e.g., as in 3GPP TS 38.213 and TS 38.214), or UE processing time for UCI multiplexing, etc., or a predetermined / configured portion thereof. In another example, the UE may alternate between transmissions corresponding to the first spatial filter and transmissions corresponding to the second spatial filter.

[0290] In one embodiment of a method for UE indication to a gNB regarding a UE-selected number of UL CG repetitions, when the UE may select different numbers of repetitions for different UL CG transmission occasions, then the UE is expected to indicate to the gNB the UE-selected number of repetitions for each ULCG transmission occasion.

[0291] In one example, when two absolute parameters (such as [K_max] and [K_min] as described in the above embodiments) are configured / indicated to the UE for the UL CG repetition number, the UE is expected to indicate the UE selected repetition number.

[0292] In another example, when the UE is configured / gNB-indicated with a single absolute parameter [K] for the number of UL CG repetitions (possibly together with a scaling parameter and / or a step size parameter), the UE is expected to indicate the UE-selected number of repetitions for UL CG transmission opportunities only when the UE selects a number of repetitions different from the configured / gNB-indicated value, and no indication is required otherwise.

[0293] In one example, there may be a flag to indicate whether the UE follows / selects the configured / gNB indicated value or whether the UE selects a different value. In one example, when the UE selects and indicates a number of repetitions for a UL CG transmission opportunity, the UE is not expected to reply to the indication and the UE is expected to send the indicated number of repetitions (e.g., according to the rules in the aforementioned embodiments) unless the UE receives an indication for (earlier) termination / cancellation of repetitions, such as a HARQ ACK or another downlink feedback indicator or a rescheduling DCI.

[0294] In one example, the UE indication of the UE selected number of repetitions for the UL CG transmission opportunity can be explicit. For example, the UE can indicate the UE selected number of repetitions for the UL CG transmission opportunity as a UCI multiplexed on the UL CG transmission itself, that is, the CG-UCI multiplexed on the CG PUSCH. This IE can be 2-3 bits of information, and there may be other IEs included in the CG-UCI. The indication can be an index into a table of adjustment levels of predetermined / configured (multiple) baseline repetition numbers or a table of predetermined / configured absolute repetition numbers, etc.

[0295] Fig.15 A flowchart of a method 1500 for explicitly indicating a UE-determined number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown. Fig.15 The illustrated embodiment of method 1500 is for illustration only. Fig.15 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0296] The UE receives configuration and activation for CG PUSCH (type 1 or type 2) including (multiple) beam indicator RS resources (1510). Then, for each CG PUSCH transmission opportunity, the UE determines the number of repetitions for the CG PUSCH transmission opportunity based on the UE measurement of (multiple) beam indicator RS resources (1520). Finally, the UE multiplexes the determined number of repetitions as CG-UCI on GCPUSCH and transmits at the CG PUSCH transmission opportunity with the determined number of repetitions (1530).

[0297] In another example, the UE indication of the number of repetitions selected by the UE for the UL CG transmission opportunity can be implicit. For example, each UL CG configuration includes multiple configurations for UL CG transmission parameters, such as multiple DMRS modes / sequences / ports / cyclic shifts / scrambling / cover codes, etc., and then there is a predetermined / configured mapping between the number of repetitions selected by the UE for the UL CG transmission opportunity and the multiple configurations for the UL CG transmission parameters (such as multiple configurations for DMRS), for example, the first number of repetitions (e.g., K_occ=2) is mapped to the first cyclic shift for DMRS, and the second number of repetitions (e.g., K_occ=4) is mapped to the second cyclic shift for DMRS.

[0298] In this case, when the UE selects a value for the number of repetitions for the UL CG transmission opportunity, the UE selects the corresponding configuration (such as the corresponding DMRS configuration) for the UL CG transmission parameters based on the mapping. For example, when the UE selects K_occ=4 for the UL CG transmission opportunity, the UE uses the second cyclic shift value for the UL CG DMRS to perform the UL CG transmission opportunity.

[0299] Fig.16 A flowchart of a method 1600 for implicitly indicating a UE-determined number of repetitions for a CG PUSCH according to an embodiment of the present disclosure is shown. Fig.16 The illustrated embodiment of method 1600 is for illustration only. Fig.16 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0300] The UE receives configuration and activation for CG PUSCH (type 1 or type 2) including (multiple) beam indication RS resources (1610). The UE also receives a mapping between a set / range of allowed values ​​for the CG PUSCH repetition number and a set of DMRS characteristics (e.g., DMRS mode / sequence / port / cyclic shift / scrambling / cover code, etc.) (1620). Then, for each CG PUSCH transmission opportunity, the UE determines the number of repetitions for the CG PUSCH transmission opportunity based on the UE measurement of the (multiple) beam indication RS resources (1630). Accordingly, the UE determines the DMRS characteristics based on the determined number of repetitions and the received mapping (1640). Finally, the UE transmits at the CG PUSCH transmission opportunity with the determined number of repetitions and the determined DMRS characteristics (1650).

[0301] In one embodiment of the enhanced repetition mechanism for DL ​​SPS, the UE receives the DL SPS with a repetition number [K], where the repetition number [K] may be different for different reception occasions of the DL SPS (i.e., the gNB may send the DL SPS PDSCH with different repetition numbers for different occasions of the DL SPS). At least most of the methods and examples developed in the aforementioned embodiments for the enhanced repetition of UL CG may be applicable to the enhanced repetition of DL SPS when appropriate changes are applied (such as changing the communication direction from UL to DL, etc.).

[0302] This embodiment is an enhancement to the traditional method of DL SPS repetition, where the number of repetitions is semi-statically RRC configured and / or indicated in an activation / reactivation DCI or MAC-CE command; either way, once indicated, it can be applied to all reception opportunities of the DL SPS (until the DL SPS is released via a release / deactivation DCI or MAC-CE command, and / or until the DL SPS transmission parameters are updated via a reactivation / modification DCI or MAC-CE command).

[0303] In one example, for example, as described in the aforementioned embodiments, one or more of the parameters [K], [K_max], [K_min], [scale_K], [step_K], etc. may be used to provide the UE with a baseline number of repetitions and / or a set of possible number of repetitions for a DL SPS reception opportunity. In another example, no information about possible numbers of DL SPS repetitions may be provided to the UE, and the actual number may be explicitly indicated to the UE for each DL SPS reception opportunity (see some further details below).

[0304] In one example, the UE may be configured with a coverage recovery or CE mode or level (such as CE mode {A, B} or CE level {0,1} or CE level {0,1,2,3}), for example for NR light applications or for coverage enhancement use cases, etc., in which case the CE level / mode may be configured or indicated to the UE, or the mapping between the measurement range (e.g., L1-RSRP range) and the possible number of repetitions (e.g., parameters [K], [K_min], [K_max], [scale_K], [step_K]) may be the same or different for different CE modes / levels. In a related example, if the UE is at a lower power level, the measurement results need to be adjusted relative to the UE power level, and a modified measurement (such as a modified L1-RSRP range) needs to be used to determine the possible number of repetitions for the DL SPS reception opportunity (e.g., parameters [K], [K_min], [K_max], [scale_K], [step_K]).

[0305] In one example, repetition of DL SPS reception opportunities occurs in (valid) DL slots / symbols, either continuously in time or with predetermined or configured gaps in the time domain. DL SPS repetition may be slot-based (also referred to as repetition type A), or may have a shorter duration / period (also referred to as repetition type B), for example, multiple symbols in only a portion of a slot (e.g., in the form of "mini-slots", "multi-segments" and / or across slot boundaries). In one example, the UE may receive an indication of valid slots (and / or symbols), such as NR light valid slots, etc., where repetition (and reception) is allowed only in the indicated valid slots. The indication of valid slots / symbols may be cell-specific and indicated via SIB, or may be UE-specific and provided via RRC configuration or dynamic DCI indication (such as group DCI format).

[0306] In one example, the UE may provide the gNB with a preferred number of repetitions for DL ​​SPS reception. For example, when the UE is configured / indicated one or more beam indication RS resources (such as (multiple) TCI states) for DL ​​SPS reception and / or one or more (additional) DL RS resources (such as (multiple) TCI states) for measurement, then the UE may use measurements of these beam indication / measurement RS resources to determine the preferred number of repetitions for DL ​​SPS, where the determination may be based on a predetermined procedure in the system specification and / or implemented by each UE.

[0307] In one example, when the UE receives DL SPS with different repetition numbers for different DL SPS reception occasions, the UE expects to receive from the gNB an indication of the repetition number selected by the gNB for each DL SPS reception occasion.

[0308] In one example, when the UE receives an indication of a number of repetitions for a DL SPS reception opportunity, the UE does not expect the indication to be replied to and expects to receive the indicated number of repetitions unless the UE sends an indication for (earlier) termination / cancellation of repetitions, such as another UCI or HARQ ACK indicating that the DL SPS has been correctly decoded by the UE.

[0309] In one example, the indication of the gNB-selected repetition number for DL ​​SPS reception occasions may be explicit. For example, the gNB-selected repetition number for DL ​​SPS reception occasions may be indicated to the UE as a DCI multiplexed on the DL SPS PDSCH itself, i.e., as an SPS-DCI multiplexed on the SPS PDSCH. Such an IE may be 2-3 bits of information, possibly with other IEs included in the SPS-DCI. The indication may be an index into a table of adjustment levels for predetermined / configured baseline repetition number(s) or a table of predetermined / configured absolute repetition numbers, etc.

[0310] Fig.17 A flow chart of a method 1700 for explicitly indicating the number of repetitions for an SPS PDSCH according to an embodiment of the present disclosure is shown. Fig.17 The illustrated embodiment of method 1700 is for illustration only. Fig.17 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0311] The UE receives configuration and activation for SPS PDSCH (type 1 or type 2) (1710). Then, for each SPS PDSCH reception opportunity, the UE receives the first repetition of the SPS PDSCH reception opportunity and determines the number of repetitions for the SPS PDSCH transmission as the SPS-DCI multiplexed with the SPS PDSCH (1720). Finally, the UE receives the SPS PDSCH reception opportunity with the determined number of repetitions (1730).

[0312] In another example, the indication of the number of repetitions selected by the gNB for the DL SPS reception occasion can be implicit. For example, each DL SPS configuration includes multiple configurations for DL ​​SPS reception parameters (such as configurations of multiple DMRS modes / sequences / ports / cyclic shifts / scrambling / cover codes, etc.), and then there is a predetermined / configured mapping between the number of repetitions selected by the gNB for the DL SPS reception occasion and the multiple configurations for DL ​​SPS reception parameters (such as multiple configurations for DMRS), for example, a first number of repetitions (e.g., K_occ=2) is mapped to a first cyclic shift for DMRS, and a second number of repetitions (e.g., K_occ=4) is mapped to a second cyclic shift for DMRS.

[0313] In this case, when the UE receives a certain configuration for DL ​​SPS reception parameters (such as a certain DMRS configuration), the UE expects the corresponding number of repetitions for the DL SPS reception opportunity based on the mapping. For example, when the UE detects the second cyclic shift value for the DL SPS DMRS, the UE expects K_occ=4 for the DL SPS reception opportunity.

[0314] Fig.18 A flow chart of a method 1800 for implicitly indicating the number of repetitions for an SPS PDSCH according to an embodiment of the present disclosure is shown. Fig.18 The illustrated embodiment of method 1800 is for illustration only. Fig.18 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0315] The UE receives configuration and activation for SPS PDSCH (type 1 or type 2) (1810). The UE also receives a mapping between a set / range of values ​​for the number of SPS PDSCH repetitions and a set of DMRS features (e.g., DMRS mode / sequence / port / cyclic shift / scrambling / cover code, etc.) (1820). Then, for each SPS PDSCH reception opportunity, the UE receives the first repetition of the SPS PDSCH reception opportunity and determines the DMRS features for the SPS PDSCH reception opportunity (1830). Accordingly, the UE determines the number of repetitions for the SPS PDSCH reception opportunity based on the determined DMRS features and the received mapping (1840). Finally, the UE receives the SPS PDSCH reception opportunity (1850) with the determined number of repetitions.

[0316] In one embodiment of beam selection and beam cycling for repetitions of a UL CG configured with multiple beams, when the UE is configured with multiple beams or beam indication RS for a UL CG configuration, and when the UE performs multiple repetitions of a UL CG transmission opportunity, the UE may use the same beam for all repetitions, or may use different beams for different repetitions of the UL CG transmission opportunity. According to this example, the number of repetitions may be configured / indicated by the gNB (as usual), or may be selected by the UE, perhaps based on gNB guidance (e.g., as discussed in the previous embodiments).

[0317] In one example, the beam indication RS resources for the UL CG may be one or more of: (multiple) SRS resource sets / subsets, (multiple) SRS resources, (multiple) (associated) CSI-RS resources or (associated) CSI-RS resource sets / subsets, (multiple) TCI states or TCI state sets / subsets, (multiple) (corresponding) QCL assumptions (such as QCL assumption type D), DL RS (such as (multiple) SSB resources or CSI-RS resources or PRS resources), wherein the spatial transmit / receive filters for the beam indication resources may be provided by RRC configuration, and / or may be provided / updated / overwritten by activating / reactivating / modifying DCI or MAC-CE commands.

[0318] In one example, a single beam / beam indication RS resource may be selected from a plurality of beam / beam indication RS resources to send all repetitions of UL CG transmission opportunities. For example, the beam / RS may be selected by the gNB or the UE, or jointly / collaboratively by both the UE and the gNB, for example, as in the example described in the aforementioned embodiment. In one example, the selection of the beam / RS for sending all repetitions of the first UL CG transmission opportunity may be independent of the selection of the beam / RS for sending all repetitions of the second UL CG transmission opportunity. In another example, the first beam / beam indication RS resource selected for sending all repetitions of the first UL CG transmission opportunity may be the same as or different from the second beam / beam indication RS resource selected for sending all repetitions of the second UL CG transmission opportunity.

[0319] In one example, there may be a predetermined / configured pattern when selecting beam / beam indication RS resources for different UL CG transmission occasions. For example, there may be a predetermined beam cycle pattern (such as from the lowest beam / RS index to the highest beam / RS index, or vice versa) for different UL CG transmission occasions. In another example, the beam selection / cycle pattern may be provided by RRC configuration and / or may be provided / updated / overwritten by activating / reactivating / modifying DCI or MAC-CE commands.

[0320] In one example, when different beams are used for different repetitions of a UL CG transmission opportunity, the total number of repetitions for the UL CG transmission opportunity may be grouped into multiple repetition groups, where each group corresponds to a different beam / beam indication RS resource. According to this example, the UE sends a first group of repetitions of a UL CG transmission opportunity using a first beam / beam indication RS resource, and sends a second group of repetitions of a UL CG transmission opportunity using a second beam / beam indication RS resource.

[0321] In one example, the mapping between repetition groups and beams / beam indication RS resources may be predetermined, such as beam cycling (e.g., from the lowest beam / RS index to the highest beam / RS index, and vice versa), or may be based on beam quality (e.g., from the strongest beam (e.g., maximum L1-RSRP) to the weakest beam (e.g., minimum L1-RSRP)), etc. In another example, the mapping between repetition groups and beams / beam indication RS resources may be RRC configured, and / or may be indicated / overwritten by activating / reactivating / modifying DCI or MAC-CE commands.

[0322] In another example, the size of the repetition groups of the UL CG transmission opportunities may be the same, or different repetition groups may have different sizes. For example, the total number of repetitions may be equally divided / partitioned between different beams / beam indication RS resources, or each beam / beam indication RS resource may correspond to a different subset / number of repetitions than the total number of repetitions, for example, a larger number of repetitions may be sent using a stronger beam and a smaller number of repetitions may be sent using a weaker beam.

[0323] Fig.19 A flowchart of a method 1900 for beam cycle repetition for CG PUSCH according to an embodiment of the present disclosure is shown. Fig.19 The illustrated embodiment of method 1900 is for illustration only. Fig.19 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more of the components may be implemented by one or more processors executing instructions to perform the functions described.

[0324] The UE receives a configuration and activation for a CG PUSCH (type 1 or type 2) including multiple beam indication RS resources (1910). The UE also receives a mapping between a set / range of allowed values ​​for the number of CG PUSCH repetitions and a set of L1-RSRP ranges (1920). The UE then determines a first L1-RSRP range for a first beam indication RS resource, and determines the first number of repetitions based on the determined first L1-RSRP range and the received mapping (1930). Similarly, the UE determines a second L1-RSRP range for a second beam indication RS resource, and determines the second number of repetitions based on the determined second L1-RSRP range and the received mapping (1940). Finally, the UE transmits at a CG PUSCH transmission opportunity using the first beam indication RS resource with the first number of repetitions and using the second beam indication RS resource with the second number of repetitions (1950). Note that the ordering of the first beam and the second beam may be a predetermined order (eg, based on RS resource index), or may be based on beam quality (eg, the first beam corresponds to a higher L1-RSRP, and the second beam corresponds to a lower L1-RSRP).

[0325] In one embodiment of beam selection and beam cycling for repetitions of a DL SPS configured with multiple beams, when the UE is configured / indicated with multiple beams or beam indication RSs for DL ​​SPS configuration, and when the UE receives multiple repetitions of DL SPS reception opportunities, the UE expects to receive all repetitions of DL SPS reception opportunities using the same beam, or may expect to receive different repetitions of DL SPS reception opportunities using different beams. According to this example, for all DL SPS reception opportunities, the number of repetitions may be configured / indicated by the gNB (as usual), or the number of repetitions may be selected / changed by the gNB for different DL SPS reception opportunities, for example as discussed in the aforementioned embodiments.

[0326] In one example, the beam indication RS resources for DL ​​SPS may be one or more of: (multiple) TCI states or a set / subset of TCI states, (multiple) (corresponding) QCL assumptions (such as QCL assumption type D), DL RS (such as (multiple) SSB resources or CSI-RS resources or PRS resources), wherein the spatial transmit / receive filters for the beam indication resources may be provided via RRC configuration, and / or may be provided / updated / overwritten via activation / reactivation / modification of DCI or MAC-CE commands.

[0327] In one example, a single beam / beam indication RS resource may be selected from a plurality of beams / beam indication RS resources to transmit all repetitions of the DL SPS reception opportunity. For example, the beam / RS may be selected by the gNB, or jointly / collaboratively selected by both the UE and the gNB, for example, as in the example described in the aforementioned embodiment. In one example, the selection of the beam / RS for receiving all repetitions of the first DL SPS reception opportunity may be independent (the same or different) from the selection of the beam / RS for receiving all repetitions of the second DL SPS reception opportunity.

[0328] In another example, there may be a predetermined / configured pattern when selecting beams / beam indication RS resources for different DL SPS reception occasions. For example, there may be a predetermined beam cycle pattern (such as from the lowest beam / RS index to the highest beam / RS index and vice versa) for different DL SPS reception occasions. In another example, the beam selection / cycle pattern may be provided by RRC configuration and / or may be provided / updated / overwritten by activating / reactivating / modifying DCI or MAC-CE commands.

[0329] In one example, when different beams are used for different repetitions of the DL SPS reception opportunity, the total number of repetitions for the DL SPS reception opportunity can be grouped into multiple repetition groups, where each group corresponds to a different beam / beam indication RS resource. According to this example, the UE receives a first group of repetitions of the DL SPS reception opportunity using a first beam / beam indication RS resource, and receives a second group of repetitions of the DL SPS reception opportunity using a second beam / beam indication RS resource.

[0330] In one example, the mapping between the repetition groups and the beam / beam indication RS resources may be predetermined, such as a beam cycle (e.g., from the lowest beam / RS index to the highest beam / RS index, or vice versa), etc. In another example, the mapping between the repetition groups and the beam / beam indication RS resources may be RRC configured, and / or may be indicated / overwritten by activating / reactivating / modifying a DCI or MAC-CE command. In yet another example, the size of the repetition groups for the DL SPS reception occasions may be the same, or different repetition groups may have different sizes. For example, the total number of repetitions may be equally divided / partitioned between different beam / beam indication RS resources, or each beam / beam indication RS resource may correspond to a different subset / number of the total number of repetitions.

[0331] In one embodiment of enhanced UL CG repetition for high priority traffic, when the UE is configured for UL CG repetition, and when the UE has (high priority, such as URLLC) traffic to send, the UE is allowed to start the (high priority) traffic in a symbol / slot corresponding to a repetition of the UL CG transmission opportunity (which is different from the first repetition of the UL CG transmission opportunity). According to this embodiment, the UE may send the (high priority) traffic with fewer repetitions than the configured / gNB-indicated repetitions.

[0332] The motivation for this enhancement is to allow UL RRC or any other high priority service to use the UL CG transmission opportunity, even if the service does not arrive / originate at the start of the UL CG transmission opportunity, but arrives / originates in the second or later time slot / sub-time slot / micro-time slot corresponding to the second or later repetition of the UL CG transmission opportunity (i.e., "in the middle of the repetition"), so that the UE can send later arriving emergency services without waiting for the start of another UL CG transmission opportunity (or making a scheduling request and waiting to be scheduled for dynamic PUSCH).

[0333] In one example, based on UE selection and implementation, the UE may start transmission in any symbol / slot / repetition of the UL CG transmission opportunity (high priority traffic).

[0334] In one example, the gNB provides an indication of a threshold for how late the UE may start transmission in a UL CG transmission opportunity, where the indication may be in terms of number of slots / symbols and / or number of repetitions (e.g., no later than the second repetition or the fourth repetition). In another example, the threshold is predetermined or RRC configured, and / or may be provided / updated / overwritten by activating / reactivating / modifying a DCI or MAC-CE command. In another example, the threshold for the later start of the UL CG transmission opportunity may be linked to a priority indication for the UE service, e.g., a predetermined or configured or indicated link / mapping between the priority level and the threshold for the later start of the UL CG transmission opportunity, e.g., a service with a first priority level may start no later than a first threshold (e.g., the second repetition) of the UL CG transmission opportunity, and a service with a second priority level may start no later than a second threshold (e.g., the fourth repetition) of the UL CG transmission opportunity.

[0335] In one example, the priority level can be an explicit priority configuration / indication in the RRC or DCI and / or an implicit priority assignment (such as a predetermined priority list in the system specification), for example, with respect to prioritization of transmit power reduction for UL carrier aggregation power control, and / or a priority level for UCI multiplexing, and / or any predetermined / configured priority link with UE transmission settings (such as RNTI).

[0336] In one example, when determining how late the UE can start transmission on the UL CG transmission opportunity, the UE processing offset is (additionally) considered, where the UE processing offset time can be (a combination / variant / function / part of) one or more of the following: PUSCH processing time, such as T defined in [3GPP TS 38.214] _proc,2 ; PHR type determination time, such as T' defined in [3GPP TS 38.213 and TS 38.214], for example _proc,2 ; UCI multiplexing time such as defined in [TS 38.213]; etc. For example, the UE is expected to start transmission on a UL CG transmission opportunity no later than a symbol / slot / repetition that is at least K symbols / slots / repetitions before the end of the UL CG transmission opportunity, where K is given by the UE processing offset time.

[0337] In principle, the proposed method can work without any indication from the UE to the gNB about the actual starting repetition index n≥1 (from the configured total number of repetitions N), but such operation would require a blind decoding type operation at the gNB to determine the actual starting repetition.

[0338] In one example, when the UE starts transmitting at a UL CG Transmit Opportunity after the UL CG Transmit Opportunity starts, the UE is expected to indicate to the gNB the actual starting symbol / slot / repetition within the UL CG Transmit Opportunity. For example, the UE needs to indicate that it starts transmitting from the second repetition of the UL CG Transmit Opportunity.

[0339] In one example, the UE indication of the start time of transmission on the UL CG transmission opportunity may be explicit. For example, the UE may indicate the start time of transmission on the UL CG transmission opportunity as a UCI multiplexed on the UL CG transmission itself, i.e., the CG-UCI multiplexed on the CG PUSCH. Such an IE may be 2-3 bits of information (possibly among other IEs contained in the CG-UCI). The indication may be an index into a table of absolute numbers of predetermined / configured symbols / time slots / repetitions, or a table of coded versions of predetermined / configured symbols / time slots / repetitions (such as SLIV-based joint coding and / or TDRA-like tables), etc. Such an indication may be auxiliary information provided by the UE to the gNB, and may avoid blind decoding by the gNB to detect the start repetition / first actual repetition from the UE, since the gNB may then know the actual repetition opportunity.

[0340] In another example, the UE indication of the start time of transmission on the UL CG transmission opportunity can be implicit. For example, when each UL CG configuration includes multiple configurations for UL CG transmission parameters (such as multiple DMRS mode / sequence / port / cyclic shift / scrambling / cover code configurations, etc.), there can be a predetermined / configured mapping between the start time of transmission on the UL CG transmission opportunity and the multiple configurations for UL CG transmission parameters (such as multiple configurations for DMRS), for example, the first start time of transmission (e.g., starting at the second repetition) is mapped to the first cyclic shift for DMRS, and the second start time of transmission (e.g., starting at the fourth repetition) is mapped to the second cyclic shift for DMRS.

[0341] In this case, when the UE intends to start at a certain start time within the UL CG transmission opportunity, the UE selects the corresponding configuration (such as the corresponding DMRS configuration) for the UL CG transmission parameters based on the mapping. For example, when the UE chooses to start at the 4th repetition within the ULCG transmission opportunity, the UE uses the second cyclic shift value for the UL CG DMRS to perform the UL CG transmission opportunity.

[0342] In one example, whenever the UE has data and is allowed to use the configured number of repetitions, the UE may start late CG transmissions only at certain predetermined or configured symbols in the first repetition opportunity, or a predetermined set of repetition opportunities, or any configured repetition opportunity for CG PUSCH. According to this example, the UE may send an indication to the gNB about the actual starting symbol or repetition opportunity, or the gNB may "blindly decode" the starting symbol or repetition opportunity without any UE indication.

[0343] In one example, when the UE starts transmitting on a symbol / timeslot / repetition different from the first symbol / timeslot / repetition, then in one option, the UE uses the RV in the same way as when the UE started in the first symbol / timeslot / repetition (i.e., taking into account and counting all missed symbols / timeslots / repetitions) - so that the corresponding RV can be any value, for example, an RV different from RV=0 is possible, and in another option, the UE uses the RV as if the repetition / transmission opportunity corresponds to the first symbol / timeslot / repetition (i.e., not taking into account and not counting any missed symbols / timeslots / repetitions) - so that the corresponding RV is always set to RV=0.

[0344] Fig. 20 A flow chart of a method 2000 for late start of sending high priority traffic on a CG PUSCH according to an embodiment of the present disclosure is shown. Fig. 20 The illustrated embodiment of method 2000 is for illustration only. Fig. 20 One or more of the components shown in the drawings may be implemented in dedicated circuits configured to perform the functions described, or one or more components may be implemented by one or more processors executing instructions to perform the functions described.

[0345] The UE receives configuration and activation for CG PUSCH (type 1 or type 2) (2010). The UE also receives a mapping between a PUSCH service priority level and a latest start repetition on the CG PUSCH (2020). The UE then receives PUSCH traffic from a higher layer and determines the corresponding priority level (2030). Accordingly, the UE determines the latest CG PUSCH start repetition based on the determined priority level and the received mapping (2040). The UE then checks whether the UE can still meet the determined latest start time for sending the PUSCH traffic on the CGPUSCH (2050).

[0346] If the UE determines that the UE cannot meet the determined latest allowed starting repetition for transmitting on the CG PUSCH transmission opportunity (e.g., if the UE has passed the latest allowed repetition, and may also take into account any UE processing time offset), the UE determines that transmission on the CG PUSCH transmission opportunity is no longer allowed (2060). However, if the UE determines that the UE can still meet the determined latest allowed starting repetition for transmitting on the CG PUSCH transmission opportunity (e.g., if the UE can transmit at or before the latest allowed repetition, and may also take into account any UE processing time offset), the UE indicates to the gNB the starting repetition for transmitting CG PUSCH traffic on the CG PUSCH transmission opportunity (2070), and transmits PUSCH traffic on the CG PUSCH transmission opportunity starting from the indicated starting repetition (2080).

[0347] Fig.21 Example operations 2100 for enhanced / flexible repetition for CG PUSCH carrying high priority traffic are shown in accordance with an embodiment of the present disclosure. Fig.21 The illustrated embodiment of operation 2100 is for illustration only.

[0348] In this embodiment, the UE receives (e.g., via DCI or MAC-CE or RRC) an activation command (2110) for a CG PUSCH configuration, together with an indication of the (maximum) number of repetitions (e.g., 4). Each CG transmission opportunity can potentially be used to transmit traffic with a corresponding priority level, which may arrive in the middle of the configured CG PUSCH repetitions. For example, traffic with priority level = 1 (high priority) arrives at the third repetition of CG transmission opportunity #1, as shown in 2120; and due to the priority, the last two repetitions of CG PUSCH transmission opportunity #1 are allowed to be transmitted, as shown in 1931. In the second example, traffic with priority level = 0 (low priority) arrives at the third repetition of CG transmission opportunity #2, as shown in 2122; but because the traffic arrival time is considered too late for such low priority traffic, transmission is not allowed, so it is not transmitted. In the last example, traffic with priority level = 2 (very high priority) arrives at the fourth / last repetition of CG send opportunity #3, as shown at 2124, and because it is considered very urgent, it is allowed to be sent even at the last configured repetition.

[0349] In one embodiment of location-based configuration of UL CG / DL SPS, configuration of transmission resources and / or parameters for UL CG / DL SPS is based on geographic location parameters. According to this embodiment, a first UL CG / DL SPS configuration in a first location uses a first set of resources and / or parameters, and a second UL CG / DL SPS configuration in a second location uses a second set of resources and / or parameters.

[0350] An example motivation for this embodiment is that the configuration of UL CG / DL SPS can be location-specific rather than UE-specific, and thus invariant to UE movement, i.e., as long as the UE is in a certain location / zone / area, the UE can use the corresponding UL CG / DL SPS configuration, but once the UE moves out of the specific location / zone / area, the UE can no longer use the UL CG / DL SPS configuration. An additional benefit of location-based configuration of UL CG / DL SPS is the control overhead savings in avoiding UE-specific signaling for configuration.

[0351] In one example, the geolocation parameter is based on some predefined classification of geographic areas within the serving cell, such as a general V2X zone or any predefined / predetermined sub-zone thereof. In another example, the UE determines the geolocation parameter of the UE, such as the current zone (e.g., V2X zone / sub-zone, such as V2X zone ID), using any positioning resource and / or method (e.g., using GPS signals or based on measurements of DL / SL PRS).

[0352] In one example, the location-based configuration of UL CG / DL SPS is provided as a cell-specific system information (SIB). For example, the cell-specific SIB may be an on-demand SIB that may be sent when a UE or a group of UEs makes a request (e.g., when entering a zone). In another example, for all location-based UL CG / DL SPS configurations within a serving cell (which may be broadcast periodically), there may be a baseline zone-common / cell-specific configuration, and then there may be (multiple) supplementary zone-specific configurations containing adjustments compared to the baseline zone-common configuration, for example, how to adjust the MCS, beam index, etc. from the baseline MCS, beam index, etc. based on the zone ID. In yet another example, only a predetermined set of UL CG / DL SPS transmission parameters (such as MCS and beam index) may be configured in the location / zone-specific configuration, while other transmission parameters (e.g., DMRS) need to be UE-specific. In another example, the zone ID is used as a scrambling parameter, such as a CRC for activation / reactivation / modification of a DCI or MAC-CE command, or, for example, for DMRS, etc.

[0353] The (multiple) supplementary zone-specific configurations may include a single configuration containing all adjustments for all zones within the serving cell (which may be a periodically broadcast SIB), or may be separate / grouped configurations for different zones (which may be (multiple) on-demand SIBs and sent upon UE request).

[0354] The location-based configuration of UL CG / DL SPS needs to take into account the payload and the number of SIBs involved. When there is a location-based UL CG / DL SPS configuration for a zone, in one option, the UEs within the zone are expected to operate with the UL CG and / or DL ​​SPS configuration, while in another option, it is up to the UE to decide whether to operate with the UL CG and / or DL ​​SPS, for example, reception on a zone-specific DL SPS may be mandatory, while transmission on a zone-specific UL CG may be optional. In another example, when the UE is configured with a location / zone-specific UL CG and / or DL ​​SPS configuration, the UE may (in addition) be configured with (multiple) UE-specific UL CG and / or DL ​​SPS configurations.

[0355] Fig. 22 A flowchart of a method 2200 for location / zone specific configuration of CG PUSCH / SPS PDSCH according to an embodiment of the present disclosure is shown. Fig. 22 The illustrated embodiment of method 2200 is for illustration only. Fig. 22 One or more of the components shown in the drawings may be implemented in dedicated circuits configured to perform the functions described, or one or more components may be implemented by one or more processors executing instructions to perform the functions described.

[0356] The UE receives (e.g., via SIB or RRC) a mapping between a geographic zone and a CG PUSCH / SPS PDSCH (Type 1 or Type 2) configuration (2210). The UE then determines the current zone based on the configured PRS resources and / or measurements of GPS signals (and using a predetermined zone, e.g., a V2X zone) (2220). Accordingly, the UE determines a valid CG PUSCH / SPS PDSCH configuration based on the determined zone (2230). Finally, the UE uses the determined valid CG PUSCH / SPS PDSCH for transmission / reception (2240).

[0357] Fig.23 A base station according to an embodiment of the present disclosure is schematically shown.

[0358] refer to Fig.23 , the base station 2300 may include a processor 2310, a transceiver 2320, and a memory 2330. However, all the components shown are not required. The base station 2300 may be composed of Fig.23 Furthermore, according to another embodiment, the processor 2310, the transceiver 2320, and the memory 2330 may be implemented as a single chip.

[0359] In an exemplary embodiment, the base station 2300 may be a gNodeB. In an exemplary embodiment, the gNB101, gNB102, and gNB103 described above may correspond to the base station 2300.

[0360] The aforementioned components will now be described in detail.

[0361] The processor 2310 may include one or more processors or other processing devices that control the proposed functions, processes and / or methods. The operations of the base station 2300 may be implemented by the processor 2310.

[0362] The transceiver 2320 may include an RF transmitter for up-converting and amplifying a transmitted signal and an RF receiver for down-converting the frequency of a received signal. However, according to another embodiment, the transceiver 2320 may be implemented by more or less components than shown in the components.

[0363] The transceiver 2320 may be connected to the processor 2310 and transmit and / or receive signals. The signals may include control information and data. In addition, the transceiver 2320 may receive signals through a wireless channel and output the signals to the processor 2310. The transceiver 2320 may transmit signals output from the processor 2310 through a wireless channel.

[0364] The memory 2330 may store control information or data included in a signal obtained by the base station 2300. The memory 2330 may be connected to the processor 2310 and store at least one instruction or protocol or parameter for the proposed function, process and / or method. The memory 2330 may include a read-only memory (ROM) and / or a random access memory (RAM) and / or a hard disk and / or a CD-ROM and / or a DVD and / or other storage devices.

[0365] Fig.24 A user equipment (UE) according to an embodiment of the present disclosure is shown.

[0366] refer to Fig.24 UE 2400 may include a processor 2410, a transceiver 2420, and a memory 2430. However, not all of the components shown are required. UE 2400 may include a processor 2410, a transceiver 2420, and a memory 2430. Fig.24 Furthermore, according to another embodiment, the processor 2410, the transceiver 2420, and the memory 2430 may be implemented as a single chip.

[0367] In an exemplary embodiment, Figure 1 The UEs 111 - 115 shown may correspond to UE 2400 .

[0368] The aforementioned components will now be described in detail.

[0369] The processor 2410 may include one or more processors or other processing devices that control the proposed functions, processes and / or methods. The operations of the UE 2400 may be implemented by the processor 2410.

[0370] The transceiver 2420 may include an RF transmitter for up-converting and amplifying a transmitted signal and an RF receiver for down-converting the frequency of a received signal. However, according to another embodiment, the transceiver 2420 may be implemented by more or less components than shown in the components.

[0371] The transceiver 2420 may be connected to the processor 2410 and transmit and / or receive signals. The signals may include control information and data. In addition, the transceiver 2420 may receive signals through a wireless channel and output the signals to the processor 2410. The transceiver 2420 may transmit signals output from the processor 2410 through a wireless channel.

[0372] The memory 2430 may store control information or data included in a signal obtained by the UE 2400. The memory 2430 may be connected to the processor 2410 and store at least one instruction or protocol or parameter for the proposed function, process and / or method. The memory 2430 may include a read-only memory (ROM) and / or a random access memory (RAM) and / or a hard disk and / or a CD-ROM and / or a DVD and / or other storage devices.

[0373] The present disclosure may be applicable to Rel-17 NR specifications for NR Light / NR-mMTC, URLLC and V2X enhancements, low overhead transmission, and generally any areas related to DL SPS PDSCH and / or UL CG PUSCH.

[0374] The present disclosure relates to a UE or a group of UEs with reduced cost and / or complexity, or, in general, reduced capability (REDCAP) UEs. For example, a REDCAP UE may have one or more of the following: reduced bandwidth, reduced number of Rx and / or Tx RF chains, reduced power class compared to a legacy / baseline UE or UE group / category (such as defined by 3GPP 5G NR Rel-15). A REDCAP UE or UE group may be considered to be a UE category (or multiple UE categories) that meets certain predetermined / specified radio and / or service requirements and / or certain predetermined / specified UE capabilities. A REDCAP UE or UE group / category may also support certain features, such as features for coverage recovery or coverage enhancement. Examples of such REDCAP UEs may include smart wearable devices / watches, surveillance cameras, and (mid-layer) wireless sensors. In certain scenarios and deployments, there may be a large number (e.g., dozens or hundreds or more) of REDCAP UEs within a serving cell.

[0375] The present disclosure also relates to any UE that benefits from / requires coverage enhancement, for example due to deployment scenarios that may experience large propagation losses (such as usage deep in buildings), or due to a reduced number of receiver antennas, or due to reduced power levels of amplifiers in the UE transmitter.

[0376] The present disclosure also relates to any UE that benefits from reduced transmission overhead and reduced receiver complexity, such as transmissions with reduced control information, reduced PDCCH monitoring requirements, transmissions with configuration grant (CG), or transmissions with semi-persistent scheduling (SPS).

[0377] The above flow charts illustrate example methods that can be implemented according to the principles of the present disclosure, and various changes can be made to the methods shown in the flow charts herein. For example, although shown as a series of steps, the various steps in each figure can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0378] Although the disclosure has been described with exemplary embodiments, various variations and modifications may be conceived by those skilled in the art. The disclosure is intended to include these variations and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as implying that any particular element, step or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method include: Receiving information of a plurality of transmission configuration indication TCI states via radio resource control (RRC) signaling, wherein the plurality of TCI states include a first TCI state and a second TCI state; identifying, based on an indication received from a base station, a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state; as well as By applying the identified first TCI state, the second TCI state, and one of the first TCI and the second TCI state, a first physical downlink shared channel PDSCH scheduled by a first downlink control information DCI format, or a first PDSCH configured by RRC signaling and activated by a first DCI format is received.

2. The method according to claim 1, further comprising: include: In a case where an indication is not received from the base station, a first TCI state for the first PDSCH is identified.

3. The method according to claim 1, in, Receiving a first PDSCH includes: In case the UE supports the capability for two TCI states and the value provided by the indication indicates both the first TCI state and the second TCI state, the first PDSCH is received by applying both the first TCI state and the second TCI state.

4. The method according to claim 1, further comprising: include: receiving a first DCI format that schedules or activates reception of a first PDSCH, The first DCI format includes a field that provides an indication for identifying a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state.

5. The method according to claim 1, further comprising: include: determining a link failure event; identifying a third TCI state among the plurality of TCI states; as well as By applying the third TCI state, a second PDSCH scheduled by the second DCI format or a second PDSCH in a semi-persistently scheduled SPS PDSCH is received.

6. A method performed by a base station in a wireless communication system, the method include: Sending information of a plurality of transmission configuration indication TCI states via radio resource control RRC signaling, wherein the plurality of TCI states include a first TCI state and a second TCI state; as well as By applying a first TCI state, a second TCI state, or one of the first TCI state and the second TCI state, a first physical downlink shared channel PDSCH scheduled by a first downlink control information DCI format or a first physical downlink shared channel PDSCH configured by RRC signaling and activated by the first DCI format is sent to a user equipment UE, The first TCI state, the second TCI state, and one of the first TCI state and the second TCI state are identified based on an indication sent from a base station.

7. The method according to claim 6, in, In case an indication is not sent from the base station, a first TCI state is identified for the first PDSCH.

8. The method according to claim 6, in, Sending the first PDSCH includes: In case the UE supports the capability for two TCI states and the value provided by the indication indicates both the first TCI state and the second TCI state, the first PDSCH is transmitted by applying both the first TCI state and the second TCI state.

9. The method according to claim 6, further comprising: include: sending a first DCI format that schedules or activates reception of a first PDSCH, The first DCI format includes a field that provides an indication for identifying a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state.

10. The method according to claim 6, further comprising: include: In case a link failure event is determined at the UE, a second PDSCH scheduled by a second DCI format or a second PDSCH in a semi-persistently scheduled SPS PDSCH is transmitted by applying a third TCI state among the plurality of TCI states.

11. A user equipment UE in a wireless communication system, the UE include: Transceiver; and At least one processor coupled to the transceiver and configured to: receiving, via radio resource control (RRC) signaling, information indicating a plurality of transmission configuration states, wherein the plurality of TCI states include a first TCI state and a second TCI state, Based on an indication received from a base station, identifying a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state, and By applying the identified first TCI state, the second TCI state, and one of the first TCI and the second TCI state, a first physical downlink shared channel PDSCH scheduled by a first downlink control information DCI format, or a first PDSCH configured by RRC signaling and activated by a first DCI format is received.

12. The UE according to claim 11, in, The at least one processor is further configured to: In a case where an indication is not received from the base station, a first TCI state for the first PDSCH is identified.

13. The UE according to claim 11, in, The at least one processor is further configured to: In case the UE supports the capability for two TCI states and the value provided by the indication indicates both the first TCI state and the second TCI state, the first PDSCH is received by applying both the first TCI state and the second TCI state.

14. The UE according to claim 11, in, The at least one processor is further configured to: receiving a first DCI format that schedules or activates reception of a first PDSCH, The first DCI format includes a field that provides an indication for identifying a first TCI state, a second TCI state, and one of the first TCI state and the second TCI state.

15. A base station in a wireless communication system, the base station include: Transceiver; and At least one processor coupled to the transceiver and configured to: Sending information of a plurality of transmission configuration indication TCI states via radio resource control RRC signaling, wherein the plurality of TCI states include a first TCI state and a second TCI state, and By applying a first TCI state, a second TCI state, or one of the first TCI state and the second TCI state, a first physical downlink shared channel PDSCH scheduled by a first downlink control information DCI format or a first PDSCH configured by RRC signaling and activated by the first DCI format is sent to a user equipment UE, The first TCI state, the second TCI state, and one of the first TCI state and the second TCI state are identified based on an indication sent from a base station.

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