Method and apparatus for TCI status indication and update via dynamic signaling

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Methods and apparatus for transmission configuration indication (TCI) status indication and update via dynamic signaling in a wireless communication system are provided. A method performed by a user equipment (UE) includes receiving a first indicator in radio resource control (RRC) signaling; receiving a second indicator in a Media Access Control (MAC) Control Element (CE); receiving scheduling information of a physical downlink shared channel (PDSCH); and receiving the PDSCH based on the first application TCI state or the second application TCI state. The method further includes identifying at least one of the first set of TCI states or the second set of TCI states based on the first indicator; determining whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state based on the second indicator; and determining whether the first TCI state and the second TCI state belong to the first group of TCI states or the second group of TCI states based on the identification and the second indicator.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly, to transmission configuration indication (TCI) state indication and updating via dynamic signaling in wireless communication systems. Background Art

[0002] 5G mobile communication technology defines a wide frequency band so that high transmission rates and new services are possible, and can be realized not only in "below 6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands called mmWave including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technology (called super 5G system) in terahertz frequency bands (e.g., 95 GHz to 3 THz frequency bands) in order to achieve a transmission rate fifty times faster than 5G mobile communication technology and an ultra-low latency one-tenth of 5G mobile communication technology.

[0003] At the beginning of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), and massive machine type communications (mMTC), there has been ongoing standardization on beamforming and massive MIMO for mitigating radio wave path loss and increasing radio wave transmission distance in mmWave, parameter sets to support dynamic operation for efficient utilization of mmWave resources and time slot formats (e.g., operating multiple subcarrier spacings), initial access technology for supporting multi-beam transmission and broadband, definition and operation of BWP (Bandwidth Part) new channel coding methods such as LDPC (Low Density Parity Check) codes for large amounts of data transmission and polar codes for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services that 5G mobile communication technology is to support, there are ongoing discussions on improvements and performance enhancements of initial 5G mobile communication technology, and there has been physical layer standardization on technologies such as V2X (Vehicle to Everything) for assisting driving determination of autonomous vehicles based on information on the location and status of the vehicle sent by the vehicle and for enhancing user convenience, NR-U (New Radio Unlicensed) for system operation in compliance with various regulatory-related requirements in unlicensed bands, NR UE power saving, non-terrestrial network (NTN) as UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0005] In addition, there has been ongoing standardization on air interface architecture / protocols for technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner, mobility enhancements including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access (NR's two-step RACH) for simplifying the random access procedure. There is also ongoing standardization on system architecture / services for 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software-defined networking (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0006] As 5G mobile communication systems are commercialized, the already exponentially growing number of connected devices will be connected to the communication network, and it is accordingly expected that enhanced functionality and performance of the 5G mobile communication systems and integrated operations of the connected devices will be necessary. To this end, new research related to extended reality (XR) is arranged for effectively supporting AR (augmented reality), VR (virtual reality), MR (mixed reality), etc., improving 5G performance and reducing complexity by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a foundation for developing not only new waveforms for providing terahertz band coverage for 6G mobile communication technology, multi-antenna transmission technologies such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas, metamaterial-based lenses and antennas for improving terahertz band signal coverage, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and high-dimensional spatial multiplexing technologies of RIS (reconfigurable smart surface), but also full-duplex technologies for improving frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technologies for achieving system optimization and internalizing end-to-end AI support functions by utilizing satellites and AI (artificial intelligence) from the design stage, and next-generation distributed computing technologies for achieving services that exceed the level of complexity that UEs can achieve by utilizing ultra-high-performance communication and computing resources to limit the limitations of UE operating capabilities. Summary of the invention

[0008] Technical issues

[0009] The present invention has been made to address at least the above problems and / or disadvantages and to provide at least the advantages described below.Accordingly, one aspect of the present invention provides a method and apparatus for TCI status indication and update via dynamic signaling.

[0010] Technical Solution

[0011] The present disclosure relates to wireless communication systems, and more particularly, to TCI status indication and update via dynamic signaling in wireless communication systems.

[0012] In one embodiment, a user equipment (UE) is provided. The UE includes: a transceiver configured to receive a first indicator associated with one or more TCI states in radio resource control (RRC) signaling; receive a second indicator including a TCI code point of a first TCI state or a second TCI state in a media access control MAC control element CE; receive scheduling information of a physical downlink shared channel (PDSCH) in downlink control information (DCI); and receive the PDSCH based on a first application TCI state or a second application TCI state. The UAE also includes a processor operably coupled to the transceiver. The processor is configured to identify at least one of a first group of TCI states or a second group of TCI states based on the first indicator; determine whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state based on the second indicator; and determine whether the first TCI state and the second TCI state belong to the first group of TCI states or the second group of TCI states based on the identification and the second indicator.

[0013] In another embodiment, a base station (BS) is provided. The BS includes: a transceiver configured to transmit a first indicator associated with one or more TCI states in RRC signaling; send a second indicator containing a TCI code point of a first TCI state or a second TCI state in a MAC-CE; send scheduling information of a PDSCH in a DCI; and send a PDSCH for reception based on a first application TCI state or a second application TCI state. The first indicator provides an indication of at least one of a first group of TCI states or a second group of TCI states. The second indicator indicates whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state. The indication and the second indicator indicate whether the first TCI state and the second TCI state belong to the first group of TCI states or the second group of TCI states.

[0014] In another embodiment, a method performed by a UE is provided. The method includes: receiving a first indicator associated with one or more TCI states in RRC signaling; receiving a second indicator including a TCI code point of a first TCI state or a second TCI state in a MAC-CE; receiving scheduling information of a PDSCH in a DCI; and receiving a PDSCH based on a first application TCI state or a second application TCI state. The method also includes identifying at least one of a first group of TCI states or a second group of TCI states based on the first indicator; determining whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state based on the second indicator; and determining that the first TCI state and the second TCI state belong to the first group of TCI states or the second group of TCI states based on the identification and the second indicator.

[0015] Other technical features may be apparent to those skilled in the art from the following drawings, descriptions and claims.

[0016] When considered in conjunction with the following description and the accompanying drawings, these and other aspects of the embodiments herein will be better appreciated and understood. However, it should be understood that the following description, although indicating at least one embodiment and many specific details thereof, is provided by way of illustration and not limitation. Without departing from the spirit of this article, many changes and modifications may be made within the scope of the embodiments herein, and the embodiments herein include all such modifications.

[0017] Before 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 including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with ... " and its derivatives mean including, included in ..., interconnected with ..., including, included in ..., connected to or with ..., coupled to or with ..., can communicate with ..., collaborate with ..., interlace, juxtapose, approach, bind to or with ..., have, have the nature of ..., have to or with ..., etc. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or 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. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items can be used, and that only one of the items in the list may be required. 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.

[0018] 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 portion thereof that are suitable for implementation in 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 disk (CD), a digital video disk (DVD) or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and rewritten later, such as rewritable optical disks or erasable memory devices.

[0019] Definitions for certain other 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.

[0020] Beneficial Effects

[0021] The advantages and salient features of the present invention will become apparent to those skilled in the art through the following detailed description of exemplary embodiments of the present invention disclosed in conjunction with the accompanying drawings.For a more enhanced communication system, a method and apparatus for TCI status indication and update via dynamic signaling is needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0023] Figure 1 An example of a wireless network according to an embodiment of the present disclosure is shown;

[0024] Figure 2 An example of a gNB according to an embodiment of the present disclosure is shown;

[0025] Figure 3 An example of a UE according to an embodiment of the present disclosure is shown;

[0026] Figure 4 and Figure 5 shows examples of wireless transmit and receive paths according to the present disclosure;

[0027] Fig. 6A An example of a wireless system beam according to an embodiment of the present disclosure is shown;

[0028] Figure 6B An example of multi-beam operation according to an embodiment of the present disclosure is shown;

[0029] Figure 7 An example of an antenna structure according to an embodiment of the present disclosure is shown;

[0030] Figure 8 illustrates an example of a multiple sending and receiving point system according to an embodiment of the present disclosure; and

[0031] Fig. 9 An example of a MAC CE command for activating a TCI state according to an embodiment of the present disclosure is shown;

[0032] Fig.10 A flow chart of a method for TCI status indication and application according to an embodiment of the present disclosure is shown;

[0033] Fig.11 Another flow chart of a method for TCI status indication and application according to an embodiment of the present disclosure is shown;

[0034] Fig.12 An example of TCI status grouping via a bitmap according to an embodiment of the present disclosure is shown;

[0035] Fig.13 An example of associating TCI states with aperiodic CSI-RS resources according to an embodiment of the present disclosure is shown;

[0036] Fig.14 Another example of associating TCI states with aperiodic CSI-RS resources according to an embodiment of the present disclosure is shown;

[0037] Fig.15 An example of associating a TCI state with an aperiodic SRS resource according to an embodiment of the present disclosure is shown; and

[0038] Fig.16 Another example of associating a TCI state with an aperiodic SRS resource according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0039] Before 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 including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with ... " and its derivatives mean including, included in ..., interconnected with ..., including, included in ..., connected to or with ..., coupled to or with ..., can communicate with ..., collaborate with ..., interlace, juxtapose, approach, bind to or with ..., have, have the nature of ..., have to or with ..., etc. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or 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. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items can be used, and that only one of the items in the list may be required. 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.

[0040] 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 portion thereof that are suitable for implementation in 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 disk (CD), a digital video disk (DVD) or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and rewritten later, such as rewritable optical disks or erasable memory devices.

[0041] Definitions for certain other 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.

[0042] Discussed below Figures 1 to 16 The various embodiments used to describe the principles of the present disclosure in this patent document are illustrative only and should not be interpreted in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0043] The following documents are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v16.1.0, “NR; Physical channels and modulation”; 3GPP TS 38.212 v16.1.0, “NR; Multiplexing and Channel coding”; 3GPP TS 38.213 v16.1.0, “NR; Physical Layer Procedures for Control”; 3GPP TS 38.214 v16.1.0, “NR; Physical Layer Procedures for Data”; 3GPP TS 38.321 v16.1.0, “NR; Medium Access Control (MAC) protocol specification”; and 3GPP TS 38.331 v16.1.0, “NR; Radio Resource Control (RRC) Protocol Specification”.

[0044] In order to meet the demand for wireless data services that has increased since the deployment of 4G communication systems and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in higher frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands) to achieve higher data rates, or in lower frequency bands (e.g., 6 GHz) to achieve robust coverage and mobility support. 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.

[0045] In addition, in 5G / NR communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RANs) ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0046] The discussion of 5G systems and frequency bands associated therewith is for reference, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even later deployments that may use terahertz (THz) frequency bands.

[0047] The following Figure 1-3 Various embodiments are described that are implemented in a wireless communication system and utilizing Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figure 1-3 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.

[0048] 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.

[0049] 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.

[0050] 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 includes UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device 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, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies.

[0051] Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wireless enabling devices. The base station may provide wireless access according to one or more wireless communication protocols (e.g., 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), LTE Advanced (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 equipment". 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).

[0052] 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 a gNB, 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.

[0053] As described in more detail below, one or more of the UEs 111-116 include circuitry, programming, or a combination thereof for TCI status indication and updating via dynamic signaling in a wireless communication system. In certain embodiments, one or more of the gNBs 101-103 include circuitry, programming, or a combination thereof for TCI status indication and updating via dynamic signaling in a wireless communication system.

[0054] 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 those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. 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.

[0055] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0056] like Figure 2 As shown, the gNB 102 includes multiple antennas 205a-205n, multiple transceivers 210a-210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0057] The transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals sent by UEs in the network 100. The transceivers 210a-210n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuits in the transceivers 210a-210n and / or the controller / processor 225, which generate processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The controller / processor 225 may further process the baseband signals.

[0058] Transmit (TX) processing circuitry in the transceivers 210a-210n and / or the controller / processor 225 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceivers 210a-210n up-convert the baseband or IF signal to an RF signal that is transmitted via the antennas 205a-205n.

[0059] 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 UL channel signals and the transmission of DL channel signals by the transceivers 210a-210n according to 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 wide variety of other functionality in the gNB 102.

[0060] The controller / processor 225 is also capable of executing programs and other processes resident in the memory 230, such as processes for TCI status indication and updates via dynamic signaling in a wireless communication system. The controller / processor 225 can move data into or out of the memory 230 as required by the executing process.

[0061] 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 wired or wireless connection. 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 with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure that supports communication via a wired or wireless connection, such as Ethernet or a transceiver.

[0062] 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.

[0063] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include any number of Figure 2 Each component shown in . 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.

[0064] 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 in FIG. 1 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.

[0065] like Figure 3 As shown, UE 116 includes antenna 305, transceiver 310, and microphone 320. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, input 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0066] Transceiver 310 receives incoming RF signals from antenna 305 transmitted by a gNB of network 100. Transceiver(s) 310 downconvert the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is processed by RX processing circuitry in transceiver 310 and / or processor 340, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. The RX processing circuitry transmits the processed baseband signal to speaker 330 (such as for voice data) or is processed by processor 340 (such as for web browsing data).

[0067] The TX processing circuit in the transceiver 310 and / or the processor 340 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 340. The TX processing circuit encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0068] The processor 340 may include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the transceiver 310 to receive DL channel signals and transmit UL channel signals according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0069] The processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for TCI status indication and updating via dynamic signaling in a wireless communication system.

[0070] Processor 340 can move data into or out of memory 360 as needed for the executing process. In some embodiments, processor 340 is configured to execute application 362 based on OS 361 or in response to signals received from a gNB or operator. Processor 340 is also coupled to I / O interface 345, which provides UE 116 with the ability to connect to other devices such as laptops and handheld computers. I / O interface 345 is the communication path between these accessories and processor 340.

[0071] The processor 340 is also coupled to an input 350 and a display 355m, including, for example, a touch screen, a keypad, etc., which an operator of the UE 116 can use to enter data into the UE 116. The display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of presenting text and / or at least limited graphics, such as from a website.

[0072] 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).

[0073] although Figure 3 An example of UE 116 is shown, but the Figure 3 For example, they can be combined, further subdivided, or omitted Figure 3 , and additional components may be added as needed. 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 another example, transceiver 310 may include any number of transceivers and signal processing chains and may be connected to any number of antennas. 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.

[0074] Figure 4 and Figure 5Example 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 TCI status indication and updates via dynamic signaling in a wireless communication system.

[0075] like Figure 4 The transmit path 400 shown includes a channel coding and modulation block 405, a serial to parallel (S to P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel to serial (P to S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. Figure 5 The receive path 500 shown includes a downconverter (DC) 555, a remove cyclic prefix block 560, a serial to parallel (S to P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel to serial (P to S) block 575, and a channel decoding and demodulation block 580.

[0076] like Figure 4 As shown, 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 using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a frequency-domain modulation symbol sequence.

[0077] Serial to parallel block 410 converts (e.g., demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in gNB 102 and UE 116. Size N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate a time domain output signal. Parallel to serial block 420 converts (e.g., multiplexes) the parallel time domain output symbols from Size N IFFT block 415 to generate a serial time domain signal. Add cyclic prefix block 425 inserts a cyclic prefix to the time domain signal. Up converter 430 modulates (e.g., upconverts) the output of add cyclic prefix block 425 to RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before conversion to RF frequency.

[0078] 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.

[0079] like Figure 5As shown, the down converter 555 down-converts the received signal to the baseband frequency, and the remove cyclic prefix block 560 removes the cyclic prefix to generate a serial time domain baseband signal. The serial to parallel block 565 converts the time domain baseband signal to a parallel time domain signal. The size N FFT block 570 performs an FFT algorithm to generate N parallel frequency domain signals. The parallel to serial block 575 converts the parallel frequency domain signals into a modulated data symbol sequence. The channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.

[0080] Each of gNBs 101-103 may implement Figure 4 The transmission path 400 shown is similar to the transmission to UE 111-116 in the downlink and can be implemented as follows Figure 5 Receive path 500 is shown, which is similar to receiving from UE 111-116 in the uplink. Similarly, each of UE 111-116 can implement transmit path 400 for transmitting to gNB 101-103 in the uplink, and can implement receive path 500 for receiving from gNB 101-103 in the downlink.

[0081] 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 in 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 415 can be implemented as configurable software algorithms, where the value of size N can be modified according to the implementation.

[0082] In addition, although described as using FFT and IFFT, this is by way of illustration only and may 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 (e.g., 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer that is a power of two (e.g., 1, 2, 4, 8, 16, etc.).

[0083] although Figure 4 and Figure 5 An example of a wireless transmit and receive path is shown, but the Figure 4 and Figure 5 For example, they can be combined, further subdivided, or omitted Figure 4 and Figure 5There are various components in it, and additional components can be added according to specific needs. In addition, 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.

[0084] The unit for DL ​​signaling or UL signaling on a cell is called a time slot and may include one or more symbols. The bandwidth (BW) unit is called a resource block (RB). One RB includes multiple subcarriers (SC). For example, a time slot may have a duration of one millisecond, and a RB may have a bandwidth of 180kHz and include 12 SCs with an inter-SC spacing of 15kHz. A time slot may be a full DL time slot, or a full UL time slot, or a hybrid time slot similar to a special subframe in a time division duplex (TDD) system.

[0085] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB transmits data information or DCI through the corresponding physical DL shared channel (PDSCH) physical DL control channel (PDCCH). PDSCH or PDCCH can be transmitted on a variable number of time slot symbols including one time slot symbol. The spatial setting for PDCCH reception can be indicated to the UE based on the configuration of the value of the TCI state of the CORESET where the UE receives the PDCCH. The spatial setting for PDSCH reception can be indicated to the UE based on the configuration of a higher layer or based on the indication of the DCI format of the PDSCH reception that schedules the value of the TCI state. The gNB can configure the UE to receive signals on a cell within the DL bandwidth part (BWP) of the cell DL BW.

[0086] 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 primarily intended for UEs to perform measurements and provide Channel State Information (CSI) to the gNB. For channel measurements, non-zero power CSI-RS (NZP CSI-RS) resources are used. For interference measurement reports (IMRs), CSI interference measurement (CSI-IM) resources associated with zero power CSI-RS (ZPCSI-RS) configurations are used. The CSI process consists of NZP CSI-RS and CSI-IM resources. The UE can determine the CSI-RS transmission parameters through DL control signaling or higher layer signaling (such as 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.

[0087] The UL signal also includes a data signal conveying information content, a control signal conveying UL control information (UCI), a DMRS associated with data or UCI demodulation, a sounding RS (SRS) enabling the gNB to perform UL channel measurement, and a random access (RA) preamble enabling the UE to perform random access. The UE transmits data information or UCI through a corresponding physical UL shared channel (PUSCH) or a physical UL control channel (PUCCH). The PUSCH or PUCCH can be transmitted on a variable number of slot symbols including one slot symbol. The gNB can configure the UE to transmit a signal on a cell within the UL BWP of the cell UL BW.

[0088] UCI includes Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information indicating correct or incorrect detection of a data transport block (TB) in the PDSCH, a Scheduling Request (SR) indicating whether the UE has data in the UE's buffer, and a CSI report that enables the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE. The HARQ-ACK information can be configured with a smaller granularity than per TB and can be per data code block (CB) or per data CB group, where a data TB includes multiple data CBs.

[0089] The CSI report from the UE may include a channel quality indicator (CQI) that informs the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect a data TB with a predetermined block error rate (BLER) such as 10% BLER, a precoding matrix indicator (PMI) that informs the gNB how to combine signals from multiple transmitter antennas according to the multiple input multiple output (MIMO) transmission principle, and a rank indicator (RI) that indicates the transmission rank of the PDSCH. The UL RS includes DMRS and SRS. DMRS is transmitted only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRS to demodulate the information in the corresponding PUSCH or PUCCH. SRS is sent by the UE to provide UL CSI to the gNB, and for TDD systems, SRS transmission can also provide PMI for DL ​​transmission. In addition, in order to establish synchronization or initial higher layer connection with the gNB, the UE can send a physical random access channel.

[0090] In the present disclosure, a beam is determined by any of the following: (1) TCI state, which establishes a quasi co-location (QCL) relationship between a source reference signal (e.g., synchronization signal / physical broadcast channel (PBCH) block (SSB) and / or CSI-RS) and a target reference signal; or (2) spatial relationship information that establishes an association with a source reference signal (such as SSB or CSI-RS or SRS). In either case, the ID of the source reference signal identifies the beam.

[0091] The TCI state and / or the spatial relation reference RS may determine a spatial Rx filter for reception of a downlink channel at the UE, or a spatial Tx filter for transmission of an uplink channel from the UE.

[0092] Fig. 6A An example wireless system beam 600 is shown in accordance with an embodiment of the present disclosure. Fig. 6A The embodiment of wireless system beam 600 shown in FIG. 6 is for illustration only.

[0093] like Fig. 6A As shown, in a wireless system, a beam 601 of a device 604 can be characterized by a beam direction 602 and a beam width 603. For example, a device 604 having a transmitter transmits radio frequency (RF) energy in the beam direction and within the beam width. A device 604 having a receiver receives RF energy coming toward the device in the beam direction and within the beam width. Fig. 6A As illustrated in , a device at point A 605 can receive from and transmit to device 604 because point A is within the beamwidth of the beam traveling along the beam direction and from device 604 .

[0094] like Fig. 6A As illustrated in , the device at point B 606 cannot receive from and transmit to device 604 because point B is outside the beam width of the beam traveling along the beam direction and from device 604. Although for illustration purposes, Fig. 6A The beams are shown to be two-dimensional (2D), but it will be apparent to one skilled in the art that the beams may be three-dimensional (3D), where the beam direction and beam width are defined in space.

[0095] Figure 6B An example multi-beam operation 650 is shown in accordance with an embodiment of the present disclosure. Figure 6B The embodiment of multi-beam operation 650 shown in FIG. 6 is for illustration only.

[0096] In wireless systems, devices can transmit and / or receive on multiple beams. This is called "multi-beam operation" and is Figure 6B Although for illustration purposes, Figure 6Bis 2D, but it will be apparent to one skilled in the art that the beams may be 3D, where the beams may be sent to or received from any direction in space.

[0097] Rel.14 LTE and Rel.15 NR support up to 32 CSI-RS antenna ports, which enables the eNB to be equipped with a large number of antenna elements (such as 64 or 128). In this case, multiple antenna elements are mapped to one CSI-RS port. For mmWave bands, although the number of antenna elements can be larger for a given form factor, the number of CSI-RS ports - which can correspond to the number of digital precoding ports - tends to be limited due to hardware constraints (such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies), such as Figure 7 shown.

[0098] Figure 7 An example antenna structure 700 is shown in accordance with an embodiment of the present disclosure. Figure 7 The illustrated embodiment of antenna structure 700 is for illustration only.

[0099] In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 701. Then, one CSI-RS port can correspond to a subarray that produces a narrow analog beam through analog beamforming 705. The analog beam can be configured to scan a wider range of angles 720 by changing the phase shifter group across symbols or subframes. The number of subarrays (equal to the number of RF chains) is the same as the number of CSI-RS ports NCSI-PORT. The digital beamforming unit 710 performs linear combinations across NCSI-PORT analog beams to further increase the precoding gain. Although the analog beams are broadband (and therefore not frequency selective), the digital precoding can vary across frequency subbands or resource blocks. Receiver operation can be similarly envisioned.

[0100] Since the above-described system utilizes multiple simulated beams for transmission and reception (wherein one or a small number of simulated beams are selected from a large number of simulated beams, for example, from time to time after a training duration), the term "multi-beam operation" is used to refer to the entire system aspect. For the purpose of description, this includes indicating an assigned DL or UL TX beam (also referred to as "beam indication"), measuring at least one reference signal for calculating and performing beam reporting (also referred to as "beam measurement" and "beam reporting", respectively), and receiving DL or UL transmissions via selecting a corresponding RX beam.

[0101] The above system is also applicable to higher frequency bands, such as >52.6GHz. In this case, the system can only use analog beams. Due to the O2 absorption loss near the 60GHz frequency (additional loss of ~10dB at 100m distance), more and sharper analog beams (and therefore more radiators in the array) may be needed to compensate for the additional path loss.

[0102] Figure 8 An example of a multiple transmission and reception point system 800 according to an embodiment of the present disclosure is shown. Figure 8 The multiple sending and receiving point embodiment of system 800 shown in FIG. 8 is for illustration only.

[0103] exist Figure 8 In a multiple transmit and receive point (TRP) system depicted in FIG, a UE may use a single receive (RX) panel or multiple RX panels to simultaneously receive various channels / RS, such as PDCCH and / or PDSCH, from multiple physically non-co-located TRPs. In the present disclosure, an RX panel may correspond to a set of RX antenna elements / ports at a UE, a set of measurement RS resources such as SRS resources, a spatial domain RX filter, etc. In addition, a TRP in a multi-TRP system may represent a set of measurement antenna ports, measurement RS resources, and / or a control resource set (CORESET).

[0104] For example, a TRP may be associated with one or more of the following: (1) multiple CSI-RS resources; (2) multiple CRIs (CSI-RS resource indexes / indicators); (3) measurement RS resource sets, such as CSI-RS resource sets and their indicators; (4) multiple CORESETs associated with CORESETPoolIndex; and (5) multiple CORESETs associated with a TRP-specific index / indicator / identifier.

[0105] A cell / TRP in an inter-cell system (e.g., an inter-cell multi-TRP system) may be a non-serving cell / TRP. In the present disclosure, a non-serving cell or a non-serving cell TRP may have / broadcast a physical cell ID and / or other higher layer signaling index value (i.e., a serving cell PCI) that is different from that of a serving cell or a serving cell TRP. In one example, a serving cell or a serving cell TRP may be associated with a serving cell ID (SCI) and / or a serving cell PCI. That is, in an inter-cell system, different cells / TRPs may broadcast different PCIs, and / or one or more cells / TRPs (referred to / defined as non-serving cells / TRPs in the present disclosure) may broadcast a PCI that is different from that of a serving cell / TRP (i.e., a serving cell PCI), and / or one or more cells / TRPs are not associated with a valid SCI (e.g., provided by a high-level parameter ServCellIndex). In the present disclosure, a non-serving cell PCI may also be referred to as an additional PCI, another PCI, or a different PCI (relative to the serving cell PCI).

[0106] In Rel.17, a unified transmission configuration indication (TCI) framework is specified for single TRP operation, where a common beam can be indicated for all UE-specific control and / or data channels. In order to extend the Rel.17 unified TCI framework to multi-TRP operation, various design aspects need to be specified, such as a means to configure one or more TCI fields or TCI status code points in a downlink control information (DCI) format (e.g., DCI format 1_1 or 1_2 with or without DL allocation) to indicate beams for multiple TRPs.

[0107] The present disclosure provides various design aspects related to DCI-based beam indication for multi-TRP operation. In particular, detailed configuration methods for TCI states, TCI fields, or TCI state code points in DCI formats 1_1 or 1_2 with or without DL allocation, and their association with different TRPs in a multi-TRP system are specified / provided in the present disclosure. The present disclosure further specifies various methods for updating one or more TCI states in the indicated TCI states for multi-TRP operation.

[0108] As described in U.S. patent application Ser. No. 17 / 584,239, which is incorporated by reference into the present disclosure, a unified TCI framework may indicate / include N≥1 DL TCI states and / or M≥1 UL TCI states, where the indicated TCI state may be at least one of: (1) a DL TCI state and / or its corresponding / associated TCI state ID; (2) a UL TCI state and / or its corresponding / associated TCI state ID; (3) a combined DL and UL TCI state and / or its corresponding / associated TCI state ID; and (4) separate DL TCI states and UL TCI states and / or their corresponding / associated TCI state IDs.

[0109] There may be various design options / channels to indicate to the UE the beam used for transmission / reception of PDCCH or PDSCH (ie, TCI status).In US Patent Application 17 / 584,239, which is incorporated by reference into the present disclosure, the following embodiments are provided.

[0110] In one example, the MAC CE may be used to indicate to the UE the beam (ie, TCI state and / or TCI state ID) used for transmission / reception of PDCCH or PDSCH.

[0111] In another example, DCI can be used to indicate to the UE the beam used for transmission / reception of PDCCH or PDSCH (i.e., TCI state and / or TCI state ID). For example, DL-related DCI (e.g., DCI format 1_0, DCI format 1_1, or DCI format 1_2) can be used to indicate to the UE the beam used for transmission / reception of PDCCH or PDSCH (i.e., TCI state and / or TCI state ID), wherein the DL-related DCI may or may not include DL allocation. For another example, UL-related DCI (e.g., DCI format 0_0, DCI format 0_1, DCI format 0_2) can be used to indicate to the UE the beam used for transmission / reception of PDCCH or PDSCH (i.e., TCI state and / or TCI state ID), wherein the UL-related DCI may or may not include UL scheduling authorization. For another example, a customized / purpose-designed DCI format can be used to indicate to the UE the beam used for transmission / reception of PDCCH or PDSCH (i.e., TCI state and / or TCI state ID).

[0112] Rel-17 introduces a unified TCI framework, where a unified or master or primary TCI state is signaled to the UE. The unified or master or primary TCI state may be one of the following: (1) in the case of joint TCI state indication, where the same beam is used for DL ​​and UL channels, the joint TCI state may be used for at least UE-specific DL channels and UE-specific UL channels; (2) in the case of separate TCI state indication, where different beams are used for DL ​​and UL channels, the DL TCI state may be used for at least UE-specific DL channels; or (3) in the case of separate TCI state indication, where different beams are used for DL ​​and UL channels, the UL TCI state may be used for at least UE-specific UL channels.

[0113] The unified (primary or primary) TCI state is the TCI state for UE-dedicated reception on PDSCH / PDCCH or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant.

[0114] As discussed above, the UE may be provided by the network, for example via signaling based on MAC CE or DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), via a higher layer parameter DLorJointTCIState or UL-TCIState, M>1 joint DL and UL TCI states or M>1 separate UL TCI states or a first combination of M>1 joint DL and UL TCI states and a separate UL TCI state or N>1 separate DL TCI states or a second combination of N>1 joint DL and UL TCI states and a separate DL TCI state or a third combination of N>1 joint DL and UL TCI states, separate DL TCI states and a separate UL Version 17 unified TCI for UE-dedicated reception on PDSCH / PDCCH or PUSCH based on dynamic grant / configuration grant and all dedicated PUCCH resources.

[0115] The UE may be configured with M>1 or N>1 TCI state pools or TCI state identifiers (IDs) by a higher layer of the network. As mentioned above, here, the TCI state may correspond to a separate DL TCI state provided by DLorJointTCIState, or a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. Each of the M>1 or N>1 TCI state / TCI state ID pools configured by a higher layer may be associated with an entity ID. In the present disclosure, the entity ID may correspond to at least one of the following: a PCI value, a PCI index pointing to an entry / PCI in a PCI list configured by a higher layer to the UE, a value of CORESETPoolIndex, a value of CORESETGroupIndex, a TRP ID, a TRP-specific high-layer signaling index, a CORESETID, a resource ID / index, a resource set ID / index, etc. In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list configured to the UE by a higher layer.

[0116] In one example, a first pool of TCI states / TCI state IDs may be associated with a lowest PCI value or a first PCI value or a lowest PCI index in a PCI index set or a first PCI index or a PCI index pointing to a lowest PCI value in a PCI list configured at a higher layer, a second pool of TCI states / TCI state IDs may be associated with a second lowest PCI value or a second PCI value or a second lowest PCI index in a PCI index set or a second PCI index or a PCI index pointing to a second lowest PCI value in a PCI list configured at a higher layer, and so on, and a last pool of TCI states / TCI state IDs may be associated with a highest PCI value or a last PCI value in a PCI list configured at a higher layer or a highest PCI index in a PCI index set or a last PCI index or a PCI index pointing to a highest PCI value in a PCI list configured at a higher layer. Or equivalently, the mth (or nth) pool of TCI states / TCI state IDs can be associated with the mth (or nth) lowest (or highest) PCI value in a higher layer configured PCI list or the mth (or nth) PCI value or the mth (or nth) lowest (or highest) PCI index in a set of PCI indices or the first PCI index or a PCI index pointing to the mth (or nth) lowest (or highest) PCI value in a higher layer configured PCI list, where m∈{1,...,M} and n∈{1,...,N}.

[0117] For M=2 (or N=2), the first (or second) pool of TCI status / TCI state IDs can be associated with the lowest PCI value or the first PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) pool of TCI status / TCI state IDs can be associated with the highest PCI value or the last PCI value in the PCI list configured by a higher layer or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer other than the serving cell PCI / PCI index.

[0118] In another example, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, then for M=2 (or N=2), the first (or second) pool of TCI states / TCI state IDs may be associated with the value 0 of CORESETPoolIndex or with the lowest PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in the PCI index set or the first PCI index or a PCI pointing to the lowest PCI value in the PCI list configured by a higher layer. The second (or first) pool of TCI states / TCI state IDs may be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value or the last PCI value in a PCI list configured by a higher layer or the highest PCI index or the last PCI index in a PCI index set or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0119] In another example, each of the M>1 (or N>1) pools of TCI states / TCI state IDs may be configured to the UE via a separate higher layer parameter. That is, the UE may be configured by the network with M>1 (or N>1) separate higher layer parameters, each parameter configuring / indicating a pool of TCI states / TCI state IDs. In addition, the higher layer parameters configuring the TCI state / TCI state ID pool may also include / indicate an entity ID as described above. For this case, if the TCI state / TCI state ID pool and the entity ID are configured / indicated via the same higher layer parameter, the pool TCI state / TCI state ID and the entity ID are associated.

[0120] In addition, when the UE is configured with TCI states or M>1 or N>1 pools of TCI state IDs by higher network layers, where each configured TCI state corresponds to a separate DL TCI state provided by DLorJointTCIState, or a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, the following examples can be provided.

[0121] In one example, for the mth (or nth) pool of TCI states / TCI state IDs including K(m) (or K(n)) TCI states / TCI state IDs, where m∈{1,...,M} and n∈{1,...,N}, the TCI state IDs in the pool of TCI states / TCI state IDs or the TCI states in the mth (or nth) pool of TCI states / TCI state IDs of TCI states / TCI state IDs are indexed according to 0,...,K(m)-1(or K(n)-1) or 1,...,K(m) (or K(n)). For example, for M=2 (or N=2), the first pool of TCI states / TCI state IDs may include K1 (e.g., 64) TCI states / TCI state IDs, and the second pool of TCI states / TCI state IDs may include K2 (e.g., 64) TCI states / TCI state IDs. For this example, the TCI state IDs in the first pool of TCI states / TCI state IDs or the TCI states in the first pool of TCI states / TCI state IDs can be indexed according to 0, ..., K1-1 (e.g., 0, ..., 63) or 1, ..., K1 (e.g., 1, ..., 64), and the TCI state IDs in the second pool of TCI states / TCI state IDs or the TCI states in the second pool of TCI states / TCI state IDs can be indexed according to 0, ..., K2-1 (e.g., 0, ..., 63) or 1, ..., K2 (e.g., 1, ..., 64).

[0122] In another example, the mth (or nth) pool of TCI states / TCI state IDs may include K(m) (or K(n)) TCI states / TCI state IDs, where m∈{1, ..., M} and n∈{1, ..., N}. For this case, the TCI state IDs in the mth (or nth) pool of TCI states / TCI state IDs or the TCI states in the mth (or nth) pool of TCI states / TCI state IDs are calculated based on (or ), …, (or )or (or ), …, (or ) indexed, where (or ). For example, for M=2 (or N=2), the first pool of TCI states / TCI state IDs may include K1 (e.g., 64) TCI states / TCI state IDs, and the second pool of TCI states / TCI state IDs may include K2 (e.g., 64) TCI states / TCI state IDs.

[0123] For this example, the TCI state IDs in the first pool of TCI states / TCI state IDs or the TCI states in the first pool of TCI states / TCI state IDs can be indexed according to 0, …, K1-1 (e.g., 0, …, 63) or 1, …, K1 (e.g., 1, …, 64), and the TCI state IDs in the second pool of TCI states / TCI state IDs or the TCI states in the second pool of TCI states / TCI state IDs can be indexed according to K1, …, K1+K2-1 (e.g., 64, …, 127) or K1+1, …, K1+K2 (e.g., 65, …, 128).

[0124] Alternatively, the UE may be configured with a single pool of TCI states or TCI state IDs by a higher layer of the network. As previously mentioned, here, the TCI state may correspond to a separate DL TCI state provided by DLorJointTCIState, or a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. The TCI state or TCI state ID configured in the TCI state / TCI state ID pool may be associated with an entity ID. In the present disclosure, the entity ID may correspond to at least one of the following: a PCI value, a PCI index pointing to an entry / PCI in a PCI list configured to the UE by a higher layer, a value of CORESETPoolIndex, a value of CORESETGroupIndex, a TRP ID, a TRP-specific high-layer signaling index, a CORESET ID, a resource ID / index, a resource set ID / index, etc. In addition, one or more of the TCI states or TCI state IDs configured in the TCI state / TCI state ID pool can be associated with the same entity ID, and different TCI states or TCI state IDs configured in the TCI state / TCI state ID pool can be associated with different entity IDs. In the present disclosure, the TCI states or TCI state IDs in the TCI state / TCI state ID pool can be divided / split into M>1 (or N>1) TCI state groups, each TCI state group including one or more TCI states / TCI state IDs. The TCI states or TCI state IDs in the same TCI state group are associated with the same entity ID.

[0125] In one example, the mth (or nth) TCI state group may include K(m) (or K(n)) TCI states / TCI state IDs, where m∈{1, ..., M} and n∈{1, ..., N}. For this case, the TCI state IDs in the mth (or nth) TCI state group or the TCI states in the mth (or nth) TCI state group are determined according to (or ), ..., (or +K(n)-1) or (or ), ..., (or ) to index, where (or ). For example, for M=2 (or N=2), the first TCI state group may include K1 (e.g., 32) TCI states / TCI state IDs in the TCI state / TCI state ID pool, and the second TCI state group may include K2 (e.g., 32) TCI states / TCI state IDs in the TCI state / TCI state ID pool. For this example, the TCI state IDs in the first TCI state group or the TCI states in the first TCI state group may be indexed according to 0, ..., K1-1 (e.g., 0, ..., 31) or 1, ..., K1 (e.g., 1, ..., 32), and the TCI state IDs in the second TCI state group or the TCI states in the second TCI state group may be indexed according to K1, ..., K1+K2-1 (e.g., 32, ..., 63) or K1+1, ..., K1+K2 (e.g., 33, ..., 65). For this example, the UE may be configured by the network, for example, via higher layer RRC signaling, of the number of TCI states / TCI state IDs (e.g., K(m) or K(n), where m∈{1,...,M} and n∈{1,...,N}) in each of the TCI state groups configured in the TCI state / TCI state ID pool (e.g., the mth or nth TCI state group, where m∈{1,...,M} and n∈{1,...,N}).

[0126] In another example, the UE may be configured by the network with M>1 (or N>1) parameters (e.g., higher layer RRC parameters), each parameter being associated with / corresponding to / configured for a TCI state group. Each parameter may include / indicate one or more TCI states / TCI state IDs. For this case, the TCI state group associated with the parameter may include one or more TCI states / TCI state IDs configured in the parameter.

[0127] In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list configured to the UE by a higher layer.

[0128] In one example, a first TCI state group may be associated with a lowest PCI value in a higher layer configured PCI list or a first PCI value or a lowest PCI index in a PCI index set or a first PCI index or a PCI index pointing to the lowest PCI value in a higher layer configured PCI list, a second TCI state group may be associated with a second lowest PCI value in a higher layer configured PCI list or a second PCI value or a second lowest PCI index in a PCI index set or a second PCI index or a PCI index pointing to the second lowest PCI value in a higher layer configured PCI list, and so on, and a last TCI state group may be associated with a highest PCI value in a higher layer configured PCI list or a last PCI value or a highest PCI index in a PCI index set or a last PCI index or a PCI index pointing to the highest PCI value in a higher layer configured PCI list. Or equivalently, the mth (or nth) TCI state group can be associated with the mth (or nth) lowest (or highest) PCI value in a PCI list configured by a higher layer or the mth (or nth) PCI value or the mth (or nth) lowest (or highest) PCI index in a PCI index set or the first PCI index or a PCI index pointing to the mth (or nth) lowest (or highest) PCI value in a PCI list configured by a higher layer, where m∈{1, ..., M} and n∈{1, ..., N}.

[0129] For M=2 (or N=2), the first (or second) TCI state group can be associated with the lowest PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state group can be associated with the highest PCI value or the last PCI value in the PCI list configured by a higher layer or a PCI / PCI index other than the serving cell PCI / PCI index or a PCI list configured by a higher layer or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0130] In another example, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, then for M=2 (or N=2), the first (or second) TCI state group can be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set, or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state group can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0131] In yet another example, the (higher layer) parameter indicating one or more TCI states / TCI state IDs of a TCI state group discussed in the example may also include / indicate an entity ID as described above. For this case, the TCI state group and entity ID are associated if they are associated with the same (higher layer) parameter specified in the example in the present disclosure.

[0132] The UE may receive one or more MAC CE sub-selection / activation commands from the network to activate one or more TCI states / TCI state IDs from one or more TCI state pools (specified in the examples in the present disclosure) or one or more TCI state groups (specified in the examples in the present disclosure) for mapping up to Nc≥1 (e.g., 8, 16, 32, or 64) TCI state code points in a DCI format.

[0133] In one example, the UE may receive a MAC CE subselection / activation command from the network, which activates a set of Nc≥1 (e.g., 8, 16, 32, or 64) TCI state code points. In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list that is configured to the UE by a higher layer.

[0134] For example, the codepoint may correspond to a TCI state, where the TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0135] For another example, a code point may correspond to a pair of two TCI states, wherein a first TCI state in the pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and a second TCI state in the pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the pair may be used for a DL channel / signal, and the other TCI state in the pair may be used for a UL channel / signal.

[0136] For another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a second TCI state. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first TCI state may be activated / selected by the MACCE from a first (or second) TCI state pool (specified in the examples in the present disclosure) or a first (or second) TCI state group (specified in the examples in the present disclosure), and the second TCI state may be activated / selected by the MAC CE from a second (or first) TCI state pool (specified in the examples in the present disclosure) or a second (or first) TCI state group (specified in the examples in the present disclosure).

[0137] For another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a second TCI state. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first (or second) TCI state may be associated with an entity ID associated with a serving cell PCI / PCI index or a first entity ID in a higher layer configuration list of the lowest entity ID or entity IDs, and the second (or first) TCI state may be associated with an entity ID associated with a PCI / PCI index other than the serving cell PCI / PCI index or a highest entity ID value or a last entity ID value in a higher layer configuration list of entity IDs.

[0138] Alternatively, the first (or second) TCI state may be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state may be associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0139] For another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a second TCI state. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0140] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first (or second) TCI state can be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0141] For another example, for M=2 (or N=2), the code point may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0142] For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal. Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0143] For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair may be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples in the present disclosure) or a first (or second) TCI state group (specified in the examples in the present disclosure), and the first TCI state and the second TCI state in the second pair may be activated / selected by the MAC CE from a second (or first) TCI state pool (specified in the examples in the present disclosure) or a second (or first) TCI state group (specified in the examples in the present disclosure).

[0144] For another example, for M=2 (or N=2), the code point may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal.

[0145] Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal.

[0146] In addition, the first TCI state and the second TCI state in the first (or second) pair may be associated with an entity ID, which is associated with the serving cell PCI / PCI index or the lowest entity ID value or the first entity ID value in a higher-layer configured entity ID list, and the first TCI state and the second TCI state in the second (or first) pair may be associated with an entity ID, which is associated with a PCI / PCI index other than the serving cell PCI / PCI index, and the entity ID is associated with the highest entity ID value or the last entity ID value in a higher-layer configured list of entity IDs. Alternatively, the first and second TCI states in the first (or second) pair may be associated with the lowest PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the first and second TCI states in the second (or first) pair may be associated with the highest PCI value or the last PCI value in the PCI / PCI index or a PCI list configured by a higher layer other than the serving cell PCI / PCI index or the highest PCI value in the PCI list configured by a higher layer or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0147] For another example, for M=2 (or N=2), the code point may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal.

[0148] Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal.

[0149] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state and the second TCI state in the first (or second) pair can be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set, or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the first TCI state and the second TCI state in the second (or first) pair can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0150] In another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first TCI state may be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples of the present disclosure) or a first (or second) TCI state group (specified in the examples of the present disclosure).

[0151] In addition, the first TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair can be used for a DL channel / signal, and the other TCI state in the first pair can be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair can be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples of the present disclosure) or a first (or second) TCI state group (specified in the examples of the present disclosure).

[0152] In yet another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first TCI state may be associated with: an entity ID associated with a serving cell PCI / PCI index or the lowest entity ID or the first entity ID in a higher layer configured entity ID list or an entity ID associated with a PCI / PCI index other than a serving cell PCI / PCI index or the highest entity ID value or the last entity ID value in a higher layer configured entity ID list.

[0153] Alternatively, the first TCI state may be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0154] In addition, the first TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair can be used for a DL channel / signal, and the other TCI state in the first pair can be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair can be associated with an entity ID, and the entity ID is associated with a serving cell PCI / PCI index or the lowest entity ID value or the first entity ID value in a higher layer configured entity ID list or an entity ID associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest entity ID value or the last entity ID value in a higher layer configured entity ID list.

[0155] Alternatively, the first and second TCI states in the first pair can be associated with the lowest PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or the highest PCI value or the last PCI value in a PCI list configured by a higher layer other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer, or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0156] In yet another example, for M=2 (or N=2), the code point may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state can be associated with a CORESETPoolIndex value of 0, or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value, or the lowest PCI index in a PCI index set, or the first PCI index, or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or a CORESETPoolIndex value of 1, or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index, or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0157] In addition, the first TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair can be used for a DL channel / signal, and the other TCI state in the first pair can be used for a UL channel / signal.

[0158] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state and the second TCI state in the first pair can be associated with a CORESETPoolIndex value of 0, or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value, or the lowest PCI index in a PCI index set, or the first PCI index, or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or a CORESETPoolIndex value of 1, or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index, or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0159] As discussed in the present disclosure, one or more of the Nc≥1 (e.g., 8, 16, 32, or 64) TCI state code points activated by the MAC CE may correspond to the TCI state code points described in the examples of the present disclosure. In addition, the "Transmission Configuration Indication" field in the DCI format 1_1 or 1_2 with or without DL allocation may indicate a TCI state code point from the Nc≥1 (e.g., 8, 16, 32, or 64) activated TCI state code points determined according to the examples of the present disclosure.

[0160] Alternatively, DCI format 1_1 with or without DL allocation or DCI format 1_2 with or without DL allocation can indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field can be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein. In another example, the first TCI field or the second TCI field can correspond to the existing "transmission configuration indication" field in DCI format 1_1 or 1_2 (with or without DL allocation). When two TCI fields are configured in DCI format 1_1 or 1_2 with or without DL allocation for beam indication, the first or second TCI state code point may be from Nc≥1 (e.g., 8, 16, 32, or 64) activated TCI state code points determined according to the examples in the present disclosure.

[0161] Alternatively, the UE may receive an auxiliary MAC CE sub-selection / activation command from the network, which selects / activates one or more (Nc'≥1, e.g., Nc'=8, 16, 32, or 64) TCI state code points from a set of Nc activated TCI state code points as a subset of Nc' TCI state code points, where the number / value of Nc' may be (1) fixed, e.g., in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling. For this case, the "Transmission Configuration Indication" field in the DCI format 1_1 or 1_2 with or without DL allocation can indicate a TCI state code point from a subset of Nc'≥1 (e.g., 8, 16, 32, or 64) TCI state code points, or the first or second TCI state code point indicated by the first or second TCI field (if configured) in the DCI format 1_1 or 1_2 with or without DL allocation can correspond to a TCI state code point from a subset of Nc'≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0162] Fig. 9 An example of a MAC CE command 900 to activate the TCI state according to an embodiment of the present disclosure is shown. Fig. 9 The embodiment of the MAC CE command 900 for activating the TCI state shown in FIG. 1 is for illustration only.

[0163] Fig. 9 A conceptual example of applying an auxiliary MAC CE command to activate one or more TCI states / TCI state pairs of the TCI field is presented in FIG. Fig. 9 As shown in , the UE may first receive a primary MAC CE sub-selection / activation command from the network, which activates Nc≥1 TCI state code points from a high-level RRC configuration list / pool of TCI states / TCI state pairs. The first TCI field / TCI field 1 in the DCI format for beam indication may indicate a first TCI state code point selected from a set of Nc TCI state code points provided by the primary MAC CE command. The UE may also receive a secondary MAC CE sub-selection / activation command that activates Nc'≥1 TCI state code points from a set of Nc TCI state code points provided by the primary MAC CE command. The second TCI field / TCI field 2 in the same DCI format for beam indication may indicate a second TCI state code point selected from a set of Nc' TCI state code points provided by the secondary MAC CE command.

[0164] In addition, in the present disclosure, the UE can be instructed by the network, for example via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling, whether to configure a single TCI field (e.g., the existing "transmission configuration indication" field) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, or to configure two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, according to the discussion above.

[0165] In addition, if the DCI format 1_1 or 1_2 for beam indication has DL allocation or the number Nc of TCI state code points to be activated by the MAC CE is less than a threshold, the TCI state code point indicated in the "Transmission Configuration Indication" field may correspond to / indicate only a single TCI state or a single pair of TCI states for single TRP operation (e.g., the TCI state code point specified in the example of the present disclosure). If two TCI fields are allowed to be configured in the DCI format for beam indication, and if the DCI format 1_1 or 1_2 for beam indication has DL allocation or the number Nc of TCI state code points to be activated by the MAC CE is less than a threshold, only one TCI field (e.g., TCI field 1 or TCI field 2) may be configured in the DCI format, and the TCI state code point indicated in the corresponding TCI field (e.g., the first TCI state code point or the second TCI state code point) may correspond to / indicate only a single TCI state or a single pair of TCI states for single TRP operation (e.g., the TCI state code point specified in the example of the present disclosure). If DCI format 1_1 or 1_2 for beam indication has DL allocation or the number Nc of TCI state code points to be activated by MAC CE is less than a threshold, each of the TCI state code points activated by MAC CE may correspond to / indicate only a single TCI state or a single pair of TCI states for single TRP operation (e.g., TCI state code points specified in the examples of the present disclosure). In the present disclosure, the threshold may be (1) fixed, for example, 8, 16, 32, or 64, or (2) configured by the network via higher layer RRC signaling or / and MAC CE commands or / and DCI-based signaling.

[0166] In one example, for M=2 (or N=2), the UE may receive from the network a MAC CE sub-selection / activation command that activates two sets of TCI state code points. For this case, the first set may contain Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and the second set may contain Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points. Alternatively, the UE may receive from the network a first MAC CE sub-selection / activation command that activates a first set of Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and a second MAC CE sub-selection / activation command that activates a second set of Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points. In the present disclosure, the number / value of Nc1 or Nc2 may be (1) fixed, for example, in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0167] For example, a codepoint in the first set of codepoints or the second set of codepoints may correspond to a TCI state, where the TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0168] For another example, a code point in the first set of code points or the second set of code points may correspond to a pair of two TCI states, wherein the first TCI state in the pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the pair may be used for a DL channel / signal, and the other TCI state in the pair may be used for a UL channel / signal.

[0169] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to a first TCI state and a second TCI state. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first TCI state may be activated / selected by the corresponding MAC CE from a first (or second) TCI state pool (specified in the example of the present disclosure) or a first (or second) TCI state group (specified in the example of the present disclosure), and the second TCI state may be activated / selected by the corresponding MAC CE from a second (or first) TCI state pool (specified in the example of the present disclosure) or a second (or first) TCI state group (specified in the example of the present disclosure).

[0170] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to a first TCI state and a second TCI state. In this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0171] In addition, the first (or second) TCI state may be associated with an entity ID associated with a serving cell PCI / PCI index or the lowest entity ID or the first entity ID in a higher layer configuration list of entity IDs, and the second (or first) TCI state may be associated with an entity ID associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest entity ID value or the last entity ID value in a higher layer configuration list of entity IDs.

[0172] Alternatively, the first (or second) TCI state may be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state may be associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0173] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to a first TCI state and a second TCI state. In this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0174] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first (or second) TCI state can be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI state can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0175] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal.

[0176] Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair can be activated / selected by the corresponding MAC CE from the first (or second) TCI state pool (specified in the examples of the present disclosure) or the first (or second) TCI state group (specified in the examples of the present disclosure), and the first TCI state and the second TCI state in the second pair can be activated / selected by the corresponding MAC CE from the second (or first) TCI state pool (specified in the examples of the present disclosure) or the second (or first) TCI state group (specified in the examples of the present disclosure).

[0177] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal.

[0178] Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal.

[0179] In addition, the first TCI state and the second TCI state in the first (or second) pair may be associated with an entity ID, which is associated with the serving cell PCI / PCI index or the lowest entity ID value or the first entity ID value in a higher-layer configured entity ID list, and the first TCI state and the second TCI state in the second (or first) pair may be associated with an entity ID, which is associated with a PCI / PCI index other than the serving cell PCI / PCI index, and the entity ID is associated with the highest entity ID value or the last entity ID value in a higher-layer configured list of entity IDs.

[0180] Alternatively, the first and second TCI states in the first (or second) pair may be associated with the lowest PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the first and second TCI states in the second (or first) pair may be associated with the highest PCI value or the last PCI value in the PCI / PCI index or a PCI list configured by a higher layer other than the serving cell PCI / PCI index or the highest PCI value in the PCI list configured by a higher layer or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0181] For another example, for M=2 (or N=2), the code points in the first (or second) code point set may correspond to two pairs of TCI states, each pair including two TCI states. The first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal. Similarly, the first TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the second pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the second pair may be used for a DL channel / signal, and the other TCI state in the second pair may be used for a UL channel / signal.

[0182] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state and the second TCI state in the first (or second) pair can be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set, or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the first TCI state and the second TCI state in the second (or first) pair can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0183] For another example, for M=2 (or N=2), the code points in the first (or second) group of code points may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, the first TCI state may be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples of the present disclosure) or a first (or second) TCI state group (specified in the examples of the present disclosure).

[0184] In addition, the first TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair can be used for a DL channel / signal, and the other TCI state in the first pair can be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair can be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples of the present disclosure) or a first (or second) TCI state group (specified in the examples of the present disclosure).

[0185] For another example, for M=2 (or N=2), the code points in the first (or second) group of code points may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0186] In addition, the first TCI state may be associated with: an entity ID associated with the serving cell PCI / PCI index or the lowest entity ID or the first entity ID in a list of entity IDs configured by a higher layer or an entity ID associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest entity ID value or the last entity ID value in a list of entity IDs configured by a higher layer.

[0187] Alternatively, the first TCI state may be associated with a serving cell PCI / PCI index or a lowest PCI value in a PCI list configured by a higher layer, or a first PCI value or a lowest PCI index in a PCI index set, or a first PCI index or a PCI index pointing to a lowest PCI value in a PCI list configured by a higher layer, or a PCI / PCI index other than the serving cell PCI / PCI index or a highest PCI value in a PCI list configured by a higher layer, or a last PCI value, or a highest PCI index in a PCI index set, or a last PCI index or a PCI index pointing to a highest PCI value in a PCI list configured by a higher layer. In addition, the first TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState.

[0188] For example, one TCI state in the first pair may be used for a DL channel / signal, and the other TCI state in the first pair may be used for a UL channel / signal. In addition, the first TCI state and the second TCI state in the first pair may be associated with an entity ID, the entity ID being associated with a serving cell PCI / PCI index or a lowest entity ID value or a first entity ID value in an entity ID list configured by a higher layer or an entity ID associated with a PCI / PCI index other than the serving cell PCI / PCI index or a highest entity ID value or a last entity ID value in an entity ID list configured by a higher layer.

[0189] Alternatively, the first and second TCI states in the first pair can be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or the highest PCI value or the last PCI value in a PCI list configured by a higher layer other than the serving cell PCI / PCI index, or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0190] For another example, for M=2 (or N=2), the code points in the first (or second) group of code points may correspond to a first TCI state and a first TCI state pair including two TCI states. For this case, the first TCI state may be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state can be associated with a CORESETPoolIndex value of 0, or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value, or the lowest PCI index in a PCI index set, or the first PCI index, or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or a CORESETPoolIndex value of 1, or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index, or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0191] In addition, the first TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState, and the second TCI state in the first pair can be a separate DL TCI state provided by DLorJointTCIState, a separate UL TCI state provided by UL-TCIState, or a joint DL and UL TCI state provided by DLorJointTCIState. For example, one TCI state in the first pair can be used for a DL channel / signal, and the other TCI state in the first pair can be used for a UL channel / signal.

[0192] In addition, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first TCI state and the second TCI state in the first pair can be associated with a CORESETPoolIndex value of 0, or a CORESETPoolIndex value associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer, or the first PCI value, or the lowest PCI index in a PCI index set, or the first PCI index, or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, or a CORESETPoolIndex value of 1, or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index, or the highest PCI value in a PCI list configured by a higher layer, or the last PCI value, or the highest PCI index in a PCI index set, or the last PCI index, or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0193] In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list configured to the UE by a higher layer.

[0194] For example, the TCI state indicated by a first set of TCI state code points may be activated / selected by the MAC CE from a first (or second) TCI state pool (specified in the examples of the present disclosure) or a first (or second) TCI state group (specified in the examples of the present disclosure), and the TCI state indicated by a second set of TCI state code points may be activated / selected by the MAC CE from a second (or first) TCI state pool (specified in the examples of the present disclosure) or a second (or first) TCI state group (specified in the examples of the present disclosure).

[0195] For another example, the TCI state indicated by the first (or second) set of TCI status code points may be associated with the entity ID associated with the serving cell PCI / PCI index or the lowest entity ID value or the first entity ID value in a higher layer configuration list of entity IDs, and the TCI state indicated by the second (or first) set of TCI status code points may be associated with the entity ID associated with the PCI / PCI index other than the serving cell PCI / PCI index or the highest entity ID value or the last entity ID value in a higher layer configuration list of entity IDs.

[0196] Alternatively, the TCI state indicated by the first (or second) set of TCI status code points may be associated with the lowest PCI value or the first PCI value in the serving cell PCI / PCI index or a PCI list configured by a higher layer or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the TCI state indicated by the second (or first) set of TCI status code points may be associated with the highest PCI value or the last PCI value in the PCI / PCI index or a PCI list configured by a higher layer other than the serving cell PCI / PCI index or the highest PCI value or the last PCI value in the PCI list configured by a higher layer or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0197] For another example, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the TCI state indicated by the first (or second) set of TCI state code points may be associated with a CORESETPoolIndex value of 0 or a CORESETPoolIndex value associated with a serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or a first PCI value or the lowest PCI index in a PCI index set or a first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the TCI state indicated by the second (or first) set of TCI state code points may be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0198] For another example, the first MAC CE sub-selection / activation command may include / indicate a first entity ID, and the second MAC CE sub-selection / activation command may include / indicate a second entity ID. In the present disclosure, the first entity ID or the second entity ID may correspond to at least one of the following: a PCI value, a PCI index pointing to an entry / PCI in a PCI list configured by a higher layer to the UE, a value of CORESETPoolIndex, a value of CORESETGroupIndex, a TRP ID, a TRP-specific high-layer signaling index, a CORESETID, a resource ID / index, a resource set ID / index, etc. For this case, the TCI state indicated by the first set of TCI state code points activated / selected by the first MAC CE sub-selection / activation command may be associated with the first entity ID, and the TCI state indicated by the second set of TCI state code points activated / selected by the second MAC CE sub-selection / activation command may be associated with the second entity ID.

[0199] For DCI-based beam indication, DCI format 1_1 with or without DL allocation or DCI format 1_2 with or without DL allocation may indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field may be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein.

[0200] In another example, the first TCI field or the second TCI field can correspond to an existing "Transmission Configuration Indication" field in DCI format 1_1 or 1_2 (with or without DL allocation). In yet another example, the first TCI field or the second TCI field can be configured by reusing one or more of the existing DCI fields in DCI format 1_1 or 1_2 (with or without DL allocation). In the present disclosure, the UE can be configured with a list of entity IDs or a list of PCIs or a set of PCI indexes by a higher layer of the network, where each PCI index points to an entry / PCI in the PCI list that is configured to the UE by a higher layer.

[0201] For example, the TCI state indicated by the first TCI state code point / first TCI field can be activated / selected by the MAC CE from the first (or second) TCI state pool (specified in the examples of the present disclosure) or the first (or second) TCI state group (specified in the examples of the present disclosure), and the TCI state indicated by the second TCI state code point / second TCI field can be activated / selected by the MAC CE from the second (or first) TCI state pool (specified in the examples of the present disclosure) or the second (or first) TCI state group (specified in the examples of the present disclosure).

[0202] For another example, the first (or second) TCI status code point / first (or second) TCI field may be associated with an entity ID, which is associated with the serving cell PCI / PCI index or the lowest entity ID value or the first entity ID value in a high-level configuration list of entity IDs, and the second (or first) TCI status code point / second (or first) TCI field may be associated with an entity ID, which is associated with a PCI / PCI index other than the serving cell PCI / PCI index, and the entity ID is associated with the highest entity ID value or the last entity ID value in the high-level configuration list of entity IDs.

[0203] Alternatively, the first (or second) TCI status code point / first (or second) TCI field may be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and the second (or first) TCI status code point / second (or first) TCI field may be associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0204] For another example, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, the first (or second) TCI state code point / first (or second) TCI field may be associated with the value 0 of CORESETPoolIndex or with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or the PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer. The second (or first) TCI status code point / second (or first) TCI field can be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value or the last PCI value in a PCI list configured by a higher layer or the highest PCI index or the last PCI index in a PCI index set or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0205] In one example, the first TCI field may indicate a first TCI state code point from a first set of TCI state code points, and the second TCI field may indicate a second TCI state code point from a second set of TCI state code points.

[0206] In another example, the first TCI field may indicate a first TCI state code point from the second set of TCI state code points, and the second TCI field may indicate a second TCI state code point from the first set of TCI state code points.

[0207] In another example, the UE may receive a first one-bit flag for a first TCI field, where "0" indicates that the first TCI state code point is indicated from the first (or second) set of TCI state code points, and "1" indicates that the first TCI state code point is indicated from the second (or first) set of TCI state code points; in addition, the UE may receive a second one-bit flag for a second TCI field, where "0" indicates that the second TCI state code point is indicated from the first (or second) set of TCI state code points, and "1" indicates that the second TCI state code point is indicated from the second (or first) set of TCI state code points. The UE may be configured by the network via higher layer RRC signaling or MAC CE command or DCI-based signaling to indicate the first or second one-bit flag indicator.

[0208] If the DCI format 1_1 or 1_2 for beam indication has DL allocation, or the number Nc1 of TCI state code points in the first set of TCI state code points to be activated by the MAC CE or the number Nc2 of TCI state code points in the second set of TCI state code points to be activated by the MAC CE or the total number Nc1+Nc2 of TCI state code points to be activated by the MAC CE is less than a threshold, then the DCI format 1_1 or 1_2 can only indicate a single TCI field (e.g., TCI field). The TCI state code point indicated in the TCI field (e.g., the first TCI state code point or the second TCI state code point) can only correspond to / indicate a single TCI state or a single pair of TCI states (e.g., selected from the first set or the second set of TCI state code points) for single TRP operation. In the present disclosure, the threshold value can be (1) fixed, for example, 8, 16, 32, or 64, or (2) configured by the network via higher layer RRC signaling or / and MAC CE commands or / and DCI-based signaling.

[0209] For DCI based beam indication, DCI format 1_1 with or without DL allocation or DCI format 1_2 with or without DL allocation may indicate / include a single "transmission configuration indication" field indicating the TCI status code point. A new one-bit flag indicator may be indicated / added in DCI format 1_1 or 1_2 with or without DL allocation; the one-bit flag indicator is used to indicate the mapping / association between the TCI field and the TRP. Alternatively, a new data indicator (NDI) field in DCI format 1_1 or 1_2 with or without DL allocation may be used to indicate the mapping / association between the TCI field and the TRP, and the NDI flips with each new transmission. Note that other existing one-bit flag indicators in DCI format 1_1 or 1_2 with or without DL allocation may also be reused to indicate the mapping / association between the TCI field and the TRP. In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list configured to the UE by a higher layer.

[0210] For example, if the one-bit flag indicator / NDI is set to "0" or the NDI is flipped, the TCI state indicated by the TCI state code point / TCI field can be activated / selected by the MAC CE from the first (or second) TCI state pool (specified in the examples of the present disclosure) or the first (or second) TCI state group (specified in the examples of the present disclosure), and if the one-bit flag indicator / NDI is set to "1" or the NDI is not flipped, the TCI state indicated by the TCI state code point / TCI field can be activated / selected by the MAC CE from the second (or first) TCI state pool (specified in the examples of the present disclosure) or the second (or first) TCI state group (specified in the examples).

[0211] For another example, if the one-bit flag indicator / NDI is set to "0" (or "1") or the NDI is flipped (or not flipped), the TCI status code point / TCI field can be associated with an entity ID that is associated with a serving cell PCI / PCI index or a lowest entity ID value or a first entity ID value in a high-layer configuration list of entity IDs, and if the one-bit flag indicator / NDI is set to "1" (or "0") or the NDI is not flipped (or flipped), the TCI status code point / TCI field can be associated with an entity ID that is associated with a PCI / PCI index other than the serving cell PCI / PCI index or a highest entity ID value or a highest entity ID value or a last entity ID value in a high-layer configuration list of entity IDs.

[0212] Alternatively, if the one-bit flag indicator / NDI is set to "0" (or "1") or the NDI is flipped (or not flipped), the TCI status code point / TCI field can be associated with the serving cell PCI / PCI index or the lowest PCI value in a PCI list configured by a higher layer or the first PCI value or the lowest PCI index in a PCI index set or the first PCI index or a PCI index pointing to the lowest PCI value in a PCI list configured by a higher layer, and if the one-bit flag indicator / NDI is set to "1" (or "0") or the NDI is not flipped (or flipped), the TCI status code point / TCI field can be associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value in a PCI list configured by a higher layer or the last PCI value or the highest PCI index in a PCI index set or the last PCI index or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0213] As another example, if two values ​​of CORESETPoolIndex (i.e., 0 and 1) are provided to the UE in the PDCCH-Config, if the one-bit flag indicator / NDI is set to "0" (or "1") or the NDI is toggled (or not toggled), then the TCI status code point / TCI field may be associated with a value of 0 for CORESETPoolIndex or with a serving cell PCI / PCI index or a lowest PCI value in a PCI list configured by a higher layer or a first PCI value or a PCI index in a set of PCI indexes or a PCI index pointing to a lowest PCI value in a PCI list configured by a higher layer. The TCI status code point / TCI field may be associated with a RESETPoolIndex value, and if the one-bit flag indicator / NDI is set to "1" (or "0") or the NDI is not flipped (or flipped), the TCI status code point / TCI field may be associated with a CORESETPoolIndex value of 1 or a CORESETPoolIndex value associated with a PCI / PCI index other than the serving cell PCI / PCI index or the highest PCI value or the last PCI value in a PCI list configured by a higher layer or the highest PCI index or the last PCI index in a PCI index set or a PCI index pointing to the highest PCI value in a PCI list configured by a higher layer.

[0214] In the present disclosure, the UE may be configured by a higher layer of the network with a list of entity IDs or a list of PCIs or a set of PCI indexes, wherein each PCI index points to an entry / PCI in the PCI list configured to the UE by a higher layer.

[0215] In one example, a new one-bit flag indicator may be indicated / added in DCI format 1_1 or 1_2 with or without DL allocation; the one-bit flag indicator is used to indicate the mapping / association between the TCI field / TCI code point and a set of code points (e.g., the first or second set of code points). Alternatively, a New Data Indicator (NDI) field in DCI format 1_1 or 1_2 with or without DL allocation may be used to indicate the mapping / association between the TCI field / TCI state code point and a set of code points (e.g., the first or second set of code points), and the NDI flips with each new transmission. Note that other existing one-bit flag indicators in DCI format 1_1 or 1_2 with or without DL allocation may also be reused to indicate the mapping / association between the TCI field / TCI state code point and a set of code points (e.g., the first or second set of code points). For this case, if the one-bit flag indicator / NDI is set to "0" (or "1") or the NDI is flipped (or not flipped), the TCI field can indicate a TCI status code point from a first set of TCI status code points, and if the one-bit flag indicator / NDI is set to "1" (or "0") or the NDI is not flipped (or is flipped), the TCI field can indicate a TCI status code point from a second set of TCI status code points.

[0216] In another example, the TCI field may indicate a TCI state code point from a third set of TCI state code points, wherein the third set of TCI state code points includes one or more TCI state code points from a first set of TCI state code points and one or more TCI state code points from a second set of TCI state code points. For example, the first set of TCI state code points may include 8 TCI state code points represented by TCI_0, TCI_1, TCI_2, TCI_3, TCI_4, TCI_5, TCI_6, or TCI_7, and the second set of TCI state code points may include 8 TCI state code points represented by TCI_A, TCI_B, TCI_C, TCI_D, TCI_E, TCI_F, TCI_G, or TCI_H. Then, the third set of TCI state code points may include TCI_0, TCI_1, TCI_2, TCI_3, TCI_A, TCI_B, TCI_C, and TCI_D. The third set of TCI state code points may include any combination of TCI state code points from the first or second set. The TCI state code points configured in the first or second set can be determined / selected into the third set based on at least one of the following: (1) fixed in the system specification, or (2) configured by the network via higher layer RRC signaling, MAC CE command, or dynamic DCI-based signaling.

[0217] If the DCI format 1_1 or 1_2 for beam indication has DL allocation, or the number Nc1 of TCI state code points in the first set of TCI state code points to be activated by MAC CE or the number Nc2 of TCI state code points in the second set of TCI state code points to be activated by MAC CE or the total number Nc1+Nc2 of TCI state code points to be activated by MAC CE is less than a threshold, then the TCI state code point indicated in the "Transmission Configuration Indication" field can only correspond to / indicate a single TCI state or a single TCI state pair for single TRP operation (e.g., selected from the first set or the second set of TCI state code points). In the present disclosure, the threshold can be (1) fixed, for example, 8, 16, 32, or 64, or (2) configured by the network via higher layer RRC signaling or / and MAC CE commands or / and DCI-based signaling.

[0218] In the present disclosure, the UE may be instructed by the network, for example via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling, whether to configure a single TCI field (e.g., the existing "transmission configuration indication" field) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, or to configure two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above.

[0219] Alternatively, if one or more of the following conditions are met / implemented, the UE may (implicitly) know / expect / assume that two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) are configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above; otherwise, the UE may (implicitly) know / expect / assume that a single TCI field (e.g., the existing "transmission configuration indication" field) is configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs.

[0220] A separate (eg, M=2 or N=2) pool / list / group of TCI states is configured to the higher layer RRC of the UE.

[0221] A single pool / list / group of TCI states is configured to the higher layer RRC of the UE, and the size of the pool / list / group of TCI states or the number of TCI states in the pool / list / group is greater than (or less than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0222] The UE receives a MAC CE sub-selection / activation command from the network to activate two sets of TCI state code points. Or the UE receives a first MAC CE sub-selection / activation command from the network to activate a first set of Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and a second MAC CE sub-selection / activation command to activate a second set of Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0223] The DCI format used for beam indication does not indicate / carry downlink PDSCH allocation.

[0224] The DCI format used for beam indication also indicates / carries downlink PDSCH allocation.

[0225] The number of TCI state code points activated by the MAC CE (e.g., Nc, Nc1, or Nc2 as discussed above in the present disclosure) or the total number of TCI state code points activated by one or more MAC CEs (e.g., Nc1+Nc2 as discussed above in the present disclosure) is greater than (or less than) a threshold, where the threshold may be (i) fixed, for example, in a system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or signaling based on dynamic DCI.

[0226] Alternatively, if one or more of the following conditions are met / implemented, the UE may (implicitly) know / expect / assume that a single TCI field (e.g., the existing "Transmission Configuration Indication" field) is configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs; otherwise, the UE may (implicitly) know / expect / assume that two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) are configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above.

[0227] A separate (eg, M=2 or N=2) pool / list / group of TCI states is configured to the higher layer RRC of the UE.

[0228] A single pool / list / group of TCI states is configured to the higher layer RRC of the UE, and the size of the pool / list / group of TCI states or the number of TCI states in the pool / list / group is less than (or greater than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0229] The UE receives a MAC CE sub-selection / activation command from the network to activate two sets of TCI state code points. Or the UE receives a first MAC CE sub-selection / activation command from the network to activate a first set of Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and a second MAC CE sub-selection / activation command to activate a second set of Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0230] The UE receives a MAC CE sub-selection / activation command from the network, which activates a single set of Nc≥1 (e.g., 8, 16, 32 or 64) TCI state code points.

[0231] The DCI format used for beam indication does not indicate / carry downlink PDSCH allocation.

[0232] The DCI format used for beam indication also indicates / carries downlink PDSCH allocation.

[0233] The number of TCI state code points activated by the MAC CE (e.g., Nc, Nc1, or Nc2 as discussed above in the present disclosure) or the total number of TCI state code points activated by one or more MAC CEs (e.g., Nc1+Nc2 as discussed above in the present disclosure) is less than (or greater than) a threshold, where the threshold may be (i) fixed, for example, in a system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or signaling based on dynamic DCI.

[0234] A one-bit flag indicator or NDI is indicated in a DCI for beam indication (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate the association / mapping between the TCI field and the set of TCI state code points activated by the MAC CE or TRP, as discussed in the examples of the present disclosure.

[0235] As described above, the UE may receive M>1 (or N>1) TCI states / TCI state pairs indicated / updated for multi-TRP operation in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). In one embodiment of the present disclosure, the DCI format for beam indication may also include / indicate one or more (e.g., M>1 or N>1) CORESET IDs, each CORESET ID being associated with the indicated TCI state / TCI state pair. For example, one or more (e.g., M>1 or N>1) CORESET IDs may be indicated by the DCI field "CORESET ID for beam indication" in the corresponding DCI format. For another example, one or more (e.g., M>1 or N>1) CORESET IDs may be indicated by reusing one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. When one or more CORESET IDs are indicated in the DCI format for beam indication, the UE may apply the indicated TCI state / TCI state pair associated with the CORESET ID for receiving PDCCH candidates in the CORESET associated with the same CORESET ID.

[0236] In one example, in a DCI format for beam indication, the first indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the first (or last) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the second (or second to last) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the last indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the last (or first) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), a first indication CORESET ID may be associated with a first (or second) indication TCI state / TCI state pair, and a second indication CORESET ID may be associated with a second (or first) indication TCI state / TCI state pair.

[0237] In another example, in the DCI format for beam indication, the lowest (or highest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the first indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second lowest (or second highest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the second indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the highest (or lowest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the last indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the lowest (or highest) CORESET ID may be associated with a first indicating TCI state / TCI state pair, and the highest (or lowest) CORESET ID may be associated with a second indicating TCI state / TCI state pair.

[0238] In another example, in the DCI format for beam indication, the first indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the lowest (or highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the second lowest (or second highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the last indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the highest (or lowest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the first indication CORESET ID can be associated with the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and the second indication CORESET ID can be associated with the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0239] In another example, in the DCI format for beam indication, the lowest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the lowest (or highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second lowest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the second lowest (or second highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the highest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the highest (or lowest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the lowest CORESET ID can be associated with the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and the highest CORESET ID can be associated with the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0240] In a multi-TRP system, the UE may receive two PDCCH candidates (represented by a first PDCCH candidate and a second PDCCH candidate) from two corresponding search space sets linked via a higher layer configuration (e.g., via an RRC parameter SearchSpaceLinking), where the two search space sets are in two CORESETs. As discussed above, the UE may receive M=2 TCI states indicated by a TCI state code point of a TCI field or a separate TCI field in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). For this case, the UE may apply a first TCI state of the indicated M=2 TCI states to receive a first PDCCH candidate in a first CORESET, and apply a second TCI state of the indicated M=2 TCI states to receive a second PDCCH candidate in a second CORESET, where the first TCI state may be associated with the first CORESET, and the second TCI state may be associated with the second CORESET, following those specified in the examples of the present disclosure.

[0241] Alternatively, in one example, the UE may apply the first (or second) indicated TCI state to receive the first or second PDCCH candidate in the CORESET with the lowest CORESET ID, and apply the second (or first) indicated TCI state to receive the first or second PDCCH candidate in the CORESET with the highest CORESET ID.

[0242] In another example, the UE may apply the indicated TCI state with the lowest (or highest) TCI state ID to receive the first or second PDCCH candidate in the CORESET with the lowest CORESET ID, and apply the indicated TCI state with the highest (or lowest) TCI state ID to receive the first or second PDCCH candidate in the CORESET with the highest CORESET ID.

[0243] In another example, the UE may apply the first (or second) indicated TCI state to receive the first or second PDCCH candidate that starts earlier in time, and apply the second (or first) indicated TCI state to receive the first or second PDCCH candidate that starts later in time.

[0244] In another example, the UE may apply the indicated TCI state with the lowest (or highest) TCI state ID to receive the first or second PDCCH candidate that starts earlier in time, and apply the indicated TCI state with the highest (or lowest) TCI state ID to receive the first or second PDCCH candidate that starts later in time.

[0245] In another embodiment of the present disclosure, the UE may be provided with different values ​​of the CORESET group index (e.g., two "0"s and "1") by the network (e.g., in PDCCH-Config), where one or more CORESETs may be associated with / configured with the same CORESET group index value.

[0246] For example, the UE may be configured by the network (e.g., via higher layer RRC signaling) with an association / mapping relationship between different values ​​of the CORESET group index and one or more CORESETs. For example, for each value of the CORESET group index (e.g., 0 or 1), the UE may be configured by the network at a higher layer with a list of CORESET IDs associated with the corresponding CORESET group index value.

[0247] For another example, a CORESET group index value, such as provided by a higher-layer parameter CORESETGroupIndex, may be included / indicated in a higher-layer parameter ControlResourceSet that configures the CORESET.

[0248] In a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) - in a CORESET associated with the value of the CORESET group index specified in the examples of the present disclosure - via a TCI state code point of a TCI field or a separate TCI field. For M=2 (or N=2), if the CORESET group index value is "0" (or "1"), the UE can apply the first indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in the CORESET; if the CORESET group index value is "1" (or "0"), the UE can apply the second indicating TCI state / TCI state pair or the indicating TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) indicating TCI state / TCI state pairs to receive PDCCH candidates in the CORESET.

[0249] Alternatively, a one-bit flag indicator may be included / indicated in the higher layer parameter ControlResourceSet configuring the CORESET. In a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) - in a CORESET configured with a one-bit flag indicator - through a TCI field or a TCI state code point of a separate TCI field. For M=2 (or N=2), if the one-bit flag indicator is set to "0" (or "1"), the UE can apply the first indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in CORESET; if the one-bit flag indicator is set to "1" (or "0"), the UE can apply the second indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the highest TCI state ID to receive PDCCH candidates in CORESET.

[0250] Alternatively, in a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) via a TCI field or a TCI state code point of a separate TCI field, where the DCI format also includes / indicates / configures a New Data Indicator (NDI) field. For M=2 (or N=2), if the NDI field is set to "0" (or "1") or the NDI is flipped (or not flipped), the UE can apply the first indicated TCI state / TCI state pair among the M=2 (or N=2) indicated TCI state / TCI state pairs or the indicated TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in the CORESET; if the NDI field is set to "1" (or "0") or the NDI is not flipped (or flipped), the UE can apply the second indicated TCI state / TCI state pair or the indicated TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) indicated TCI state / TCI state pairs to receive PDCCH candidates in the CORESET.

[0251] As discussed above, the UE may receive M>1 (or N>1) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). Later, one or more TCI states / TCI state pairs may be indicated by the network to the UE to update one or more of the previously indicated M>1 (or N>1) TCI states / TCI state pairs. For example, for M=2 (or N=2),

[0252] In one example, the UE may first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a first DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later in time, the UE may receive M=1 (or N=1) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a second DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format.

[0253] The first one-bit flag indicator may be used to indicate to the UE whether the (M=1 or N=1) TCI state / TCI state pair indicated in the corresponding (second) DCI format is for single TRP operation or updates one of the previously indicated (M=2 or N=2) TCI states / TCI state pairs in the corresponding (first) DCI format. The first one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication) via the DCI field "TCI state for single TRP".

[0254] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI field) may be reused / used to indicate the first one-bit flag indicator. For example, if the first one-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped) - when the first one-bit flag indicator is indicated by NDI, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals configured to follow / share the TCI states / TCI state pairs indicated in the second DCI format and configured by higher layers. Otherwise, that is, if the first one-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the first one-bit flag indicator is indicated by NDI, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. The first one-bit flag indicator may be applied to one or more of the following design examples.

[0255] For example, when the first one-bit flag indicator is set to "1" (or "0") or flipped (or not flipped) - if the first one-bit flag indicator is indicated by NDI - according to the above discussion, the second one-bit flag indicator can be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI. The second one-bit flag indicator can be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs".

[0256] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI field) may be reused / used to indicate a second one-bit flag indicator. If the second one-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the second one-bit flag indicator is indicated by NDI, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. If the second single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the second single-bit flag indicator is indicated by NDI, the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0257] Fig.10 1 shows a flow chart of a method 1000 for TCI status indication and application according to an embodiment of the present disclosure. The method 1000 may be performed by a UE (e.g., Figure 1 111-116) as shown. Fig.10 The embodiment of method 1000 shown in FIG. 1 is for illustration only.

[0258] As another example, a one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs". Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., the NDI field) may be reused / used to indicate the one-bit flag indicator. If the one-bit flag indicator is not configured / enabled, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or for PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or to other channels / signals configured to follow / share the TCI state / TCI state pairs indicated in the second DCI format.

[0259] Otherwise, if the single-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the single-bit flag indicator is indicated by NDI, the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the single-bit flag indicator is set to "1" (or "0") or is flipped (not flipped), then when the single-bit flag indicator is indicated by NDI, the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. Fig.10 In, examples of the signaling flows / processes discussed above are provided.

[0260] like Fig.10 As shown in , in 1001, the UE receives two TCI states TCI state #A and TCI state #B in the first DCI. In 1002, later in time, the UE receives a single TCI state #C in the second DCI. In 1003, the condition of whether a single-bit flag indicator is enabled / configured in the second DCI is checked. If the single-bit flag indicator is not enabled / configured, the signaling process proceeds to 1005. Otherwise, the signaling process proceeds to 1004. In 1004, the condition of whether the single-bit flag indicator is set to "0" or "1" is checked. If the single-bit flag indicator is set to "1", the signaling process proceeds to 1006. Otherwise, the signaling process proceeds to 1007. In 1005, the UE may apply the TCI state #C indicated in the second DCI to single TRP operation. In 1006, the UE may apply the TCI state #C indicated in the second DCI to replace / update the TCI state #B indicated in the first DCI. That is, the UE may apply TCI state #A indicated in the first DCI and TCI state #C indicated in the second DCI to multi-TRP operation. In 1007, the UE may apply TCI state #C indicated in the second DCI to replace / update TCI state #A indicated in the first DCI. That is, the UE may apply TCI state #B indicated in the first DCI and TCI state #C indicated in the second DCI to multi-TRP operation.

[0261] As another example, a two-bit indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state indication or update". Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate the two-bit indicator. If the 2-bit indicator is set to "00" (or "01" or "10" or "11"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to a single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals that a higher layer is configured to follow / share the TCI state / TCI state pairs indicated in the second DCI format. If the 2-bit indicator is set to "01" (or "00", "10" or "11"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace one of the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the 2-bit indicator is set to "10" (or "00" or "01" or "11"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the 2-bit indicator is set to "11" (or "00" or "01" or "10"), the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0262] For another example, the UE may receive a second DCI in a CORESET associated with a value of CORESETPoolIndex or a value of a CORESET group index according to those specified in the examples of the present disclosure. When the first single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped) - if the first single-bit flag indicator is indicated by NDI - according to the above discussion: If the UE receives a second DCI in a CORESET associated with a value of 0 (or 1) of CORESETPoolIndex or a value of 0 (or 1) of a CORESET group index, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. I state pair or the TCI state / TCI state pair with the lowest TCI state ID; if the UE receives a second DCI in a CORESET associated with a value of 1 (or 0) for CORESETPoolIndex or a value of 1 (or 0) for CORESET group index, the UE may apply the M=1 (or N=1) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0263] For another example, as discussed previously, a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation) can indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point, and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field can be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein. In another example, the first TCI field or the second TCI field can correspond to the existing "transmission configuration indication" field in DCI format 1_1 or 1_2 (with or without DL allocation). In yet another example, the first TCI field or the second TCI field can be configured by reusing one or more bits of one or more of the existing / reserved DCI fields in DCI format 1_1 or 1_2 (with or without DL allocation).

[0264] For this example, if M=1 (or N=1) TCI state / TCI state pair is indicated by the first (or second) TCI field, the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest TCI state ID. If M=1 (or N=1) TCI state / TCI state pair is indicated by the second (or first) TCI field, the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the highest TCI state ID.

[0265] Fig.11 1 shows another flow chart of a method 1100 for TCI status indication and application according to an embodiment of the present disclosure. The method 1100 may be performed by a UE (e.g., Figure 1 111-116) as shown. Fig.11 The embodiment of method 1100 shown in FIG. 1 is for illustration only.

[0266] For another example, a bitmap may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI status update for multiple TRPs".

[0267] Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate a bitmap. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI. In this example, the bitmap has two entries / bit positions. When the first single-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped) - if the first single-bit flag indicator is indicated by NDI - according to the above discussion or the bitmap is not configured / enabled, the UE can apply M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channel / signal higher layers configured to follow / share the TCI state / TCI state pairs indicated in the second DCI format.

[0268] Otherwise, when the first one-bit flag indicator is set to "1" (or "0") or is toggled (or not toggled) - if the first one-bit flag indicator is indicated by NDI - according to the above discussion or the bitmap is configured / enabled: If the first entry / bit position of the bitmap is set to "1", the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. I state pair or TCI state / TCI state pair with the lowest (or highest) TCI state ID, and if the second entry / bit position of the bitmap is set to "1", the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. Fig.11 In, examples of the signaling flows / processes discussed above are provided.

[0269] like Fig.11 As shown in , in 1101, the UE receives two TCI states TCI state #A and TCI state #B in the first DCI. In 1102, later in time, the UE receives a single TCI state #C in the second DCI. In 1103, check whether the condition of enabling / configuring the bitmap in the second DCI. If the bitmap is not enabled / configured, the signaling process proceeds to 1105. Otherwise, the signaling process proceeds to 1104. In 1104, check whether the condition of the bitmap is set to "10". If the bitmap is set to "10", the signaling process proceeds to 1107. Otherwise, the signaling process proceeds to 1106. In 1105, the UE can apply the TCI state #C indicated in the second DCI to single TRP operation. In 1106, if the bitmap is set to "01", the UE can apply the TCI state #C indicated in the second DCI to replace / update the TCI state #B indicated in the first DCI. That is, the UE may apply TCI state #A indicated in the first DCI and TCI state #C indicated in the second DCI to multi-TRP operation. In 1107, the UE may apply TCI state #C indicated in the second DCI to replace / update TCI state #A indicated in the first DCI. That is, the UE may apply TCI state #B indicated in the first DCI and TCI state #C indicated in the second DCI to multi-TRP operation.

[0270] For this design example, the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be selected from Nc≥1 (e.g., Nc=8, 16, 32, etc.) TCI state code points activated by the first MAC CE activation command, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc may be (1) fixed, e.g., in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE command and / or dynamic DCI-based signaling.

[0271] In one example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may correspond to a joint DL and UL TCI state or a pair of separate DL and UL TCI states for a TCI state code point activated by the first MAC CE command. For this example, the UE may follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0272] In another example, the M=1 (or N=1) TCI state / TCI state pairs indicated in the second DCI may correspond to a first TCI state / TCI state pair or a TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs selected as TCI state code points activated by the first MAC CE command, or a second TCI state / TCI state pair or a TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs selected as TCI state code points activated by the first MAC CE command.

[0273] For example, if the selected TCI state / TCI state pair (such as M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has the same TCI state ID as one or more TCI state / TCI state pairs of one or more TCI state code points activated by the first MAC CE command, the UE can follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0274] For another example, if the selected TCI state / TCI state pair (such as M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has a TCI state ID different from any of the TCI state / TCI state pairs of all TCI state code points activated by the first MAC CE command: If the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the TCI state code points activated by the first MAC The UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC CE command; otherwise, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID indicated in the first DCI, For the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of TCI state code points activated by the CE command, or the TCI state / TCI state pair with the highest (or lowest) TCI state ID, the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI, or the TCI state / TCI state pair with the highest TCI state ID.

[0275] For another example, the UE may first be indicated by the network whether the selected TCI state / TCI state pair (such as the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) corresponds to the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC CE command. Or corresponds to the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC CE command (in the case where the selected TCI state / TCI state pair (such as the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has the same TCI state ID as one or more TCI state / TCI state pairs of one or more TCI state code points activated by the first MAC CE command).

[0276] According to the instruction of the network, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code point activated by the first MAC CE command or the TCI state / TCI state pair with the lowest (or highest) TCI state ID, the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest TCI state ID; otherwise, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the first TCI state / TCI state pair activated by the first MAC For the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of TCI state code points activated by the CE command, or the TCI state / TCI state pair with the highest (or lowest) TCI state ID, the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI, or the TCI state / TCI state pair with the highest TCI state ID.

[0277] In another example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may be selected from Nc'≥1 (e.g., Nc'=8, 16, 32, etc.) TCI state code points activated by a MAC CE activation command different from the first MAC CE command, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc' may be (1) fixed, for example in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling. For this example, the UE can follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0278] Alternatively, the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest (or highest) TCI state ID can be selected from Nc1≥1 (for example, Nc1=8, 16, 32, etc.) TCI state code points activated by the first MAC CE activation command, and the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the highest (or lowest) TCI state ID can be selected from Nc2≥1 (for example, Nc2=8, 16, 32, etc.) TCI state code points activated by the second MAC CE activation command, where the activated TCI state code points in the first or second MAC CE command can correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states or a pair of separate DL and UL TCI states. The M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI can correspond to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by the first MAC CE command, or a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by the second MAC CE command. In the present disclosure, the number / value of Nc1 or Nc2 can be (1) fixed, for example in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or signaling based on dynamic DCI.

[0279] In one example, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by a first MAC CE command, the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI; if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by a second MAC CE command, the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. TCI state, the UE can apply M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0280] In another example, the UE may follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0281] In another example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may be selected from Nc'≥1 (e.g., Nc'=8, 16, 32, etc.) TCI state code points activated by a MAC CE activation command different from the first and second MAC CE commands, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc' may be (1) fixed, for example in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling. For this example, the UE can follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0282] In another example, the UE can first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format in a first DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later in time, the UE may receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format in a second DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation).

[0283] For example, a one-bit flag indicator may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI. The one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs". Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., an NDI field) may be reused / used to indicate a one-bit flag indicator. If the single-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the single-bit flag indicator is indicated by NDI, the UE can apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the single-bit flag indicator is indicated by NDI, the UE can apply the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0284] As another example, the UE may receive a second DCI in a CORESET associated with a value of CORESETPoolIndex or a value of a CORESET group index according to those specified in the examples of the present disclosure. If the UE receives a second DCI in a CORESET associated with a value of 0 (or 1) of CORESETPoolIndex or a value of 0 (or 1) of a CORESET group index, the UE may apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. ; If the UE receives a second DCI in a CORESET associated with a value of 1 (or 0) for CORESETPoolIndex or a value of 1 (or 0) for CORESET group index, the UE may apply the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0285] For another example, a bitmap may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs". Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate a bitmap. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI. In this example, the bitmap has two entries / bit positions. If the first (or second) entry / bit position of the bitmap is set to "1", the UE may apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI, and If the second (or first) entry / bit position of the bitmap is set to "1", the UE can apply the second (or first) TCI state / TCI state pair and the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0286] In yet another example, as previously discussed, a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation) can indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point, and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field can be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein. In another example, the first TCI field or the second TCI field can correspond to the existing "transmission configuration indication" field in DCI format 1_1 or 1_2 (with or without DL allocation).

[0287] In yet another example, the first TCI field or the second TCI field can be configured (with or without DL allocation) by reusing one or more bits of one or more of the existing / reserved DCI fields in DCI format 1_1 or 1_2. The first TCI state code point of the first TCI field may be selected / determined from Nc1≥1 (e.g., Nc1=8, 16, 32, etc.) TCI state code points activated by a first MAC CE activation command, wherein the activated TCI state code point may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair; and the first TCI state code point of the second TCI field may be selected / determined from Nc2≥1 (e.g., Nc2=8, 16, 32, etc.) TCI state code points activated by a second MAC CE activation command, wherein the activated TCI state code point may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair. In the present disclosure, the number / value of Nc1 or Nc2 may be (1) fixed, for example, in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0288] For example, the first TCI state code point of the first TCI field indicated by the first DCI is different from the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is the same as the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0289] For another example, the first TCI state code point of the first TCI field indicated by the first DCI is the same as the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is different from the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0290] For another example, the first TCI state code point of the first TCI field indicated by the first DCI is different from the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is also different from the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0291] In yet another example, the UE may first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point such as a TCI field or a separate TCI field in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later, the UE may receive a MAC CE indicating M=1 (or N=1) TCI states / TCI state pairs selected / activated from one or more lists / pools of TCI states / TCI state pairs configured by RRC to update one of the M=2 (N=2) TCI states / TCI state pairs indicated in the DCI. A first single-bit flag indicator may be included / indicated / configured in the MAC CE activation command to indicate to the UE whether the (M=1 or N=1) TCI state / TCI state pair indicated in the MAC CE activation command is for single TRP operation or to update one of the (M=2 or N=2) TCI states / TCI state pairs previously indicated in the corresponding DCI format.

[0292] For example, if the first bit flag indicator is set to "0" (or "1"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE activation command to single TRP operation, i.e., all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or other channels / signals configured to follow / share the TCI state / TCI state pairs indicated in the MAC CE command. Otherwise, that is, if the first bit flag indicator is set to "1" (or "0"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI. The first bit flag indicator may be applied to one or more of the following design examples.

[0293] For example, when the first one-bit flag indicator is set to "1" (or "0") according to the above discussion, a second one-bit flag indicator may be included / indicated / configured in the MAC CE activation command to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command. If the second one-bit flag indicator is set to "0" (or "1"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI. If the second one-bit flag indicator is set to "1" (or "0"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI. For this design example, the second one-bit flag indicator may also correspond to a CORESETPoolIndex or a CORESET group index specified according to the examples in the present disclosure.

[0294] As another example, a one-bit flag indicator may be included / indicated / configured in the MAC CE activation command. If the one-bit flag indicator is not configured / enabled in the MAC CE command, the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE activation command to a single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or for PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or other channels / signals configured to follow / share the TCI state / TCI state pairs indicated in the MAC CE command. Otherwise, if the one-bit flag indicator is set to "0" (or "1"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE activation command to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI. If the one-bit flag indicator is set to "1" (or "0"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI. For this design example, the one-bit flag indicator may also correspond to a CORESETPoolIndex or a CORESET group index specified according to the examples in the present disclosure.

[0295] For another example, a two-bit indicator may be included / indicated / configured in the MAC CE activation command. If the 2-bit indicator is set to "00" (or "01" or "10" or "11"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command to single TRP operation, i.e., all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or other channels / signals configured to follow / share the TCI state / TCI state pairs indicated in the MAC CE command. If the 2-bit indicator is set to "01" (or "00" or "10" or "11"), the UE may apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI. If the 2-bit indicator is set to "10" (or "00" or "01" or "11"), the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the lowest TCI state ID. If the 2-bit indicator is set to "11" (or "00" or "01" or "10"), the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the highest TCI state ID.

[0296] For another example, a bitmap may be included / indicated / configured in a MAC CE activation command. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command. In this example, the bitmap has two entries / bit positions. When the first bit flag indicator is set to "0" (or "1") or the bitmap is not configured / enabled according to the above discussion, the UE may apply the M=1 (or N=1) TCI state / TCI state pairs indicated in the MAC CE command to a single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or for PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or for other channels / signal higher layers configured to follow / share the TCI state / TCI state pair indicated in the MAC CE command. Otherwise, when the first bit flag indicator is set to "1" (or "0") or the bitmap is configured / enabled as discussed above: if the first entry / bit position of the bitmap is set to "1", the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and if the second entry / bit position of the bitmap is set to "1", the UE can apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0297] In the present disclosure, the UE may be instructed by the network, for example via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling, whether to configure a single TCI field (e.g., the existing "transmission configuration indication" field) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, or to configure two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above.

[0298] Alternatively, if one or more of the following conditions are met / implemented, the UE may (implicitly) know / expect / assume that two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) are configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above; otherwise, the UE may (implicitly) know / expect / assume that a single TCI field (e.g., the existing "transmission configuration indication" field) is configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs.

[0299] In one example, a separate (eg, M=2 or N=2) pool / list / group of TCI states is configured to the higher layer RRC of the UE.

[0300] In one example, a single pool / list / group of TCI states is configured to a higher layer RRC of the UE, and the size of the pool / list / group of TCI states or the number of TCI states in the pool / list / group is greater than (or less than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0301] In one example, the UE receives a MAC CE sub-selection / activation command from the network to activate two sets of TCI state code points. Or the UE receives a first MAC CE sub-selection / activation command from the network to activate a first set of Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and a second MAC CE sub-selection / activation command to activate a second set of Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0302] In one example, the DCI format used for beam indication does not indicate / carry downlink PDSCH allocation.

[0303] In one example, the DCI format used for beam indication also indicates / carries downlink PDSCH allocation.

[0304] In one example, the number of TCI state code points activated by the MAC CE (e.g., Nc, Nc1, or Nc2 as discussed above in the present disclosure) or the total number of TCI state code points activated by one or more MAC CEs (e.g., Nc1+Nc2 as discussed above in the present disclosure) is greater than (or less than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0305] Alternatively, if one or more of the following conditions are met / implemented, the UE may (implicitly) know / expect / assume that a single TCI field (e.g., the existing "Transmission Configuration Indication" field) is configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs; otherwise, the UE may (implicitly) know / expect / assume that two separate TCI fields (e.g., the first TCI field / TCI field 1 and the second TCI field / TCI field 2 as discussed above) are configured in the DCI (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate M=2 (or N=2) TCI states / TCI state pairs, respectively, as discussed above.

[0306] In one example, a separate (eg, M=2 or N=2) pool / list / group of TCI states is configured to the higher layer RRC of the UE.

[0307] In one example, a single pool / list / group of TCI states is configured to a higher layer RRC of the UE, and the size of the pool / list / group of TCI states or the number of TCI states in the pool / list / group is less than (or greater than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0308] In one example, the UE receives a MAC CE sub-selection / activation command from the network to activate two sets of TCI state code points. Or the UE receives a first MAC CE sub-selection / activation command from the network to activate a first set of Nc1≥1 (e.g., 8, 16, 32, or 64) TCI state code points, and a second MAC CE sub-selection / activation command to activate a second set of Nc2≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0309] In one example, the UE receives a MAC CE sub-selection / activation command from the network that activates a single set of Nc≥1 (e.g., 8, 16, 32, or 64) TCI state code points.

[0310] In one example, the DCI format used for beam indication does not indicate / carry downlink PDSCH allocation.

[0311] In one example, the DCI format used for beam indication also indicates / carries downlink PDSCH allocation.

[0312] In one example, the number of TCI state code points activated by the MAC CE (e.g., Nc, Nc1, or Nc2 as discussed above in the present disclosure) or the total number of TCI state code points activated by one or more MAC CEs (e.g., Nc1+Nc2 as discussed above in the present disclosure) is less than (or greater than) a threshold, where the threshold can be (i) fixed, for example, in the system specification, and (ii) configured to the UE via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0313] In one example, a one-bit flag indicator or NDI is indicated in a DCI for beam indication (e.g., DCI format 1_1 or 1_2 with or without downlink allocation) to indicate the association / mapping between the TCI field and a set of TCI state code points activated by a MAC CE or TRP, as discussed in the examples of the present disclosure.

[0314] As described above, the UE may receive M>1 (or N>1) TCI states / TCI state pairs indicated / updated for multi-TRP operation in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). In one embodiment of the present disclosure, the DCI format for beam indication may also include / indicate one or more (e.g., M>1 or N>1) CORESET IDs, each CORESET ID being associated with the indicated TCI state / TCI state pair. For example, one or more (e.g., M>1 or N>1) CORESET IDs may be indicated by the DCI field "CORESET ID for beam indication" in the corresponding DCI format. For another example, one or more (e.g., M>1 or N>1) CORESET IDs may be indicated by reusing one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. When one or more CORESET IDs are indicated in the DCI format for beam indication, the UE may apply the indicated TCI state / TCI state pair associated with the CORESET ID for receiving PDCCH candidates in the CORESET associated with the same CORESET ID.

[0315] In one example, in a DCI format for beam indication, the first indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the first (or last) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the second (or second to last) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the last indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the last (or first) indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), a first indication CORESET ID may be associated with a first (or second) indication TCI state / TCI state pair, and a second indication CORESET ID may be associated with a second (or first) indication TCI state / TCI state pair.

[0316] In another example, in the DCI format for beam indication, the lowest (or highest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the first indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second lowest (or second highest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the second indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the highest (or lowest) CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the last indicated TCI state / TCI state pair among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the lowest (or highest) CORESET ID may be associated with a first indicating TCI state / TCI state pair, and the highest (or lowest) CORESET ID may be associated with a second indicating TCI state / TCI state pair.

[0317] In another example, in the DCI format for beam indication, the first indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the lowest (or highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the second lowest (or second highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the last indicated CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the highest (or lowest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the first indication CORESET ID can be associated with the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and the second indication CORESET ID can be associated with the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0318] In another example, in the DCI format for beam indication, the lowest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the lowest (or highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, the second lowest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the second lowest (or second highest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs, and so on, and the highest CORESET ID among the indicated M>1 (or N>1) CORESET IDs may be associated with the TCI state / TCI state pair having the highest (or lowest) TCI state ID among the indicated M>1 (or N>1) TCI state / TCI state pairs. For M=2 (or N=2), the lowest CORESET ID can be associated with the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and the highest CORESET ID can be associated with the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0319] In a multi-TRP system, the UE will receive two PDCCH candidates (represented by a first PDCCH candidate and a second PDCCH candidate) from two corresponding search space sets linked via a higher layer configuration (e.g., by an RRC parameter SearchSpaceLinking), where the two search space sets are in two CORESETs. As discussed above, the UE may receive M=2 TCI states indicated by a TCI state code point of a TCI field or a separate TCI field in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). For this case, the UE may apply a first TCI state of the indicated M=2 TCI states to receive a first PDCCH candidate in a first CORESET, and apply a second TCI state of the indicated M=2 TCI states to receive a second PDCCH candidate in a second CORESET, where the first TCI state may be associated with the first CORESET and the second TCI state may be associated with the second CORESET, following those specified in the examples in the present disclosure.

[0320] In one example, the UE may apply the first (or second) indicated TCI state to receive the first or second PDCCH candidate in the CORESET with the lowest CORESET ID, and apply the second (or first) indicated TCI state to receive the first or second PDCCH candidate in the CORESET with the highest CORESET ID.

[0321] In another example, the UE may apply the indicated TCI state with the lowest (or highest) TCI state ID to receive the first or second PDCCH candidate in the CORESET with the lowest CORESET ID, and apply the indicated TCI state with the highest (or lowest) TCI state ID to receive the first or second PDCCH candidate in the CORESET with the highest CORESET ID.

[0322] In another example, the UE may apply the first (or second) indicated TCI state to receive the first or second PDCCH candidate that starts earlier in time, and apply the second (or first) indicated TCI state to receive the first or second PDCCH candidate that starts later in time.

[0323] In another example, the UE may apply the indicated TCI state with the lowest (or highest) TCI state ID to receive the first or second PDCCH candidate that starts earlier in time, and apply the indicated TCI state with the highest (or lowest) TCI state ID to receive the first or second PDCCH candidate that starts later in time.

[0324] In another embodiment of the present disclosure, the UE may be provided with different values ​​(e.g., two - "0" and "1") of the CORESET group index by the network (e.g., in PDCCH-Config), where one or more CORESETs may be associated with / configured with the same CORESET group index value.

[0325] For example, the UE may be configured by the network (e.g., via higher layer RRC signaling) with an association / mapping relationship between different values ​​of the CORESET group index and one or more CORESETs. For example, for each value of the CORESET group index (e.g., 0 or 1), the UE may be configured by the network at a higher layer with a list of CORESET IDs associated with the corresponding CORESET group index value.

[0326] For another example, a CORESET group index value, such as provided by a higher-layer parameter CORESETGroupIndex, may be included / indicated in a higher-layer parameter ControlResourceSet that configures the CORESET.

[0327] In a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) - in a CORESET associated with the value of the CORESET group index specified in the examples in the present disclosure - via a TCI state code point of a TCI field or a separate TCI field. For M=2 (or N=2), if the CORESET group index value is "0" (or "1"), the UE can apply the first indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in the CORESET; if the CORESET group index value is "1" (or "0"), the UE can apply the second indicating TCI state / TCI state pair or the indicating TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) indicating TCI state / TCI state pairs to receive PDCCH candidates in the CORESET.

[0328] Alternatively, a one-bit flag indicator may be included / indicated in the higher layer parameter ControlResourceSet configuring the CORESET. In a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) - in a CORESET configured with a one-bit flag indicator - through a TCI field or a TCI state code point of a separate TCI field. For M=2 (or N=2), if the one-bit flag indicator is set to "0" (or "1"), the UE can apply the first indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in CORESET; if the one-bit flag indicator is set to "1" (or "0"), the UE can apply the second indicating TCI state / TCI state pair among the M=2 (or N=2) indicating TCI state / TCI state pairs or the indicating TCI state / TCI state pair with the highest TCI state ID to receive PDCCH candidates in CORESET.

[0329] Alternatively, in a multi-TRP system, the UE may receive M>1 (or N>1) TCI states / TCI state pairs in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation) via a TCI field or a TCI state code point of a separate TCI field, where the DCI format also includes / indicates / configures a New Data Indicator (NDI) field. For M=2 (or N=2), if the NDI field is set to "0" (or "1") or the NDI is flipped (or not flipped), the UE can apply the first indicated TCI state / TCI state pair among the M=2 (or N=2) indicated TCI state / TCI state pairs or the indicated TCI state / TCI state pair with the lowest TCI state ID to receive PDCCH candidates in the CORESET; if the NDI field is set to "1" (or "0") or the NDI is not flipped (or flipped), the UE can apply the second indicated TCI state / TCI state pair or the indicated TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) indicated TCI state / TCI state pairs to receive PDCCH candidates in the CORESET.

[0330] As discussed above, the UE may receive M>1 (or N>1) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation). Later, one or more TCI states / TCI state pairs may be indicated by the network to the UE to update one or more of the previously indicated M>1 (or N>1) TCI states / TCI state pairs. For example, for M=2 (or N=2), the following example may be provided.

[0331] In one example, the UE may first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a first DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later in time, the UE may receive M=1 (or N=1) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, in a second DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format.

[0332] The first one-bit flag indicator may be used to indicate to the UE whether the (M=1 or N=1) TCI state / TCI state pair indicated in the corresponding (second) DCI format is for single TRP operation or updates one of the previously indicated (M=2 or N=2) TCI states / TCI state pairs in the corresponding (first) DCI format. The first one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication) via the DCI field "TCI state for single TRP".

[0333] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI field) may be reused / used to indicate the first one-bit flag indicator. For example, if the first one-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped) - when the first one-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals configured by higher layers to follow / share the TCI states / TCI state pairs indicated in the second DCI format. Otherwise, that is, if the first single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the first single-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI.

[0334] The first single-bit flag indicator may be applied to one or more of the following design examples.

[0335] For example, when the first one-bit flag indicator is set to "1" (or "0") or flipped (or not flipped) - if the first one-bit flag indicator is indicated by NDI - according to the above discussion, the second one-bit flag indicator can be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI. The second one-bit flag indicator can be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs".

[0336] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI field) may be reused / used to indicate a second one-bit flag indicator. If the second one-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the second one-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. If the second single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the second single-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0337] For another example, a one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI status update for multiple TRPs".

[0338] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI field) may be reused / used to indicate a one-bit flag indicator. If the one-bit flag indicator is not configured / enabled, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals of higher layers configured to follow / share the TCI states / TCI state pairs indicated in the second DCI format.

[0339] Otherwise, if the single-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the single-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the single-bit flag indicator is set to "1" (or "0") or is flipped (not flipped), then when the single-bit flag indicator is indicated by NDI, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. Figure 8 In, examples of the signaling flows / processes discussed above are provided.

[0340] like Fig.10 As shown in , in 1001, the UE receives two TCI states TCI state #A and TCI state #B in the first DCI. In 1002, later in time, the UE receives a single TCI state #C in the second DCI. In 1003, the condition of whether a single-bit flag indicator is enabled / configured in the second DCI is checked. If the single-bit flag indicator is not enabled / configured, the signaling process proceeds to 1005. Otherwise, the signaling process proceeds to 1004. In 1004, the condition of whether the single-bit flag indicator is set to "0" or "1" is checked. If the single-bit flag indicator is set to "1", the signaling process proceeds to 1006. Otherwise, the signaling process proceeds to 1007. In 1005, the UE will apply the TCI state #C indicated in the second DCI for single TRP operation. In 1006, the UE will apply the TCI state #C indicated in the second DCI to replace / update the TCI state #B indicated in the first DCI. That is, the UE will apply TCI state #A indicated in the first DCI and TCI state #C indicated in the second DCI for multi-TRP operation. In 1007, the UE will apply TCI state #C indicated in the second DCI to replace / update TCI state #A indicated in the first DCI. That is, the UE will apply TCI state #B indicated in the first DCI and TCI state #C indicated in the second DCI for multi-TRP operation.

[0341] As another example, a two-bit indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI status indication or update".

[0342] Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate a two-bit indicator. If the 2-bit indicator is set to "00" (or "01" or "10" or "11"), the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals configured by higher layers to follow / share the TCI states / TCI state pairs indicated in the second DCI format.

[0343] If the 2-bit indicator is set to "01" (or "00" or "10" or "11"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace one of the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the 2-bit indicator is set to "10" (or "00" or "01" or "11"), the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the 2-bit indicator is set to "11" (or "00" or "01" or "10"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0344] For another example, according to those specified in the examples in the present disclosure, the UE may receive a second DCI in a CORESET associated with a value of CORESETPoolIndex or a value of a CORESET group index. When the first single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped) - if the first single-bit flag indicator is indicated by NDI - according to the above discussion: If the UE receives a second DCI in a CORESET associated with a value of 0 (or 1) for CORESETPoolIndex or a value of 0 (or 1) for CORESET group index, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI; if the UE receives a second DCI in a CORESET associated with a value of 1 (or 0 ... CORESET group index, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first D If a second DCI is received from a CORESET associated with an index value of 1 (or 0), the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI.

[0345] For another example, as discussed previously, a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation) can indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point, and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field can be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein.

[0346] In another example, the first TCI field or the second TCI field can correspond to an existing "transmission configuration indication" field in DCI format 1_1 or 1_2 (with or without DL allocation). In yet another example, the first TCI field or the second TCI field can be configured by reusing one or more bits of one or more of the existing / reserved DCI fields in DCI format 1_1 or 1_2 (with or without DL allocation). For this example, if M=1 (or N=1) TCI states / TCI state pairs are indicated by the first (or second) TCI field, the UE will apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI. If M=1 (or N=1) TCI state / TCI state pair is indicated by the second (or first) TCI field, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0347] For another example, a bitmap may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI status update for multiple TRPs".

[0348] Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate a bitmap. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI. In this example, the bitmap has two entries / bit positions. When the first single-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped) - if the first single-bit flag indicator is indicated by NDI - according to the above discussion or the bitmap is not configured / enabled, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals configured by higher layers that are configured to follow / share the TCI states / TCI state pairs indicated in the second DCI format.

[0349] Otherwise, when the first one-bit flag indicator is set to "1" (or "0") or is toggled (or not toggled) - if the first one-bit flag indicator is indicated by NDI - according to the above discussion or the bitmap is configured / enabled: If the first entry / bit position of the bitmap is set to "1", the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first (or second) TCI state / TCI in the M=2 (or N=2) TCI state / TCI state pair indicated in the first DCI State pair or TCI state / TCI state pair with the lowest (or highest) TCI state ID, and if the second entry / bit position of the bitmap is set to "1", the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. Fig.11 In, examples of the signaling flows / processes discussed above are provided.

[0350] like Fig.11 As shown in , in 1101, the UE receives two TCI states TCI state #A and TCI state #B in the first DCI. In 1102, later in time, the UE receives a single TCI state #C in the second DCI. In 1103, check whether the condition of the bitmap is enabled / configured in the second DCI. If the bitmap is not enabled / configured, the signaling process proceeds to 1105. Otherwise, the signaling process proceeds to 1104. In 1104, check whether the condition of the bitmap is set to "10". If the bitmap is set to "10", the signaling process proceeds to 1107. Otherwise, the signaling process proceeds to 1106. In 1105, the UE will apply the TCI state #C indicated in the second DCI for single TRP operation. In 1106, if the bitmap is set to "01", the UE will apply the TCI state #C indicated in the second DCI to replace / update the TCI state #B indicated in the first DCI. That is, the UE will apply TCI state #A indicated in the first DCI and TCI state #C indicated in the second DCI for multi-TRP operation. In 1107, the UE will apply TCI state #C indicated in the second DCI to replace / update TCI state #A indicated in the first DCI. That is, the UE will apply TCI state #B indicated in the first DCI and TCI state #C indicated in the second DCI for multi-TRP operation.

[0351] For this design example, the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be selected from Nc≥1 (e.g., Nc=8, 16, 32, etc.) TCI state code points activated by the first MAC CE activation command, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc may be (1) fixed, e.g., in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE command and / or dynamic DCI-based signaling.

[0352] In one example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may correspond to a joint DL and UL TCI state or a pair of separate DL and UL TCI states for a TCI state code point activated by the first MAC CE command. For this example, the UE will follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0353] In another example, the M=1 (or N=1) TCI state / TCI state pairs indicated in the second DCI may correspond to a first TCI state / TCI state pair or a TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs selected as TCI state code points activated by the first MAC CE command, or a second TCI state / TCI state pair or a TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs selected as TCI state code points activated by the first MAC CE command.

[0354] For example, if the selected TCI state / TCI state pair (such as M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has the same TCI state ID as one or more TCI state / TCI state pairs of one or more TCI state code points activated by the first MAC CE command, the UE will follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0355] For another example, if the selected TCI state / TCI state pair (such as M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has a TCI state ID different from any of the TCI state / TCI state pairs of all TCI state code points activated by the first MAC CE command: If the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the TCI state code points activated by the first MAC The UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC address command. Otherwise, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID indicated in the first DCI, The second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of TCI state code points activated by the CE command, or the TCI state / TCI state pair with the highest (or lowest) TCI state ID, the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI, or the TCI state / TCI state pair with the highest TCI state ID.

[0356] For another example, the UE may first be indicated by the network whether the selected TCI state / TCI state pair (such as the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) corresponds to the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC CE command. Or corresponds to the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code points activated by the first MAC CE command (in the case where the selected TCI state / TCI state pair (such as the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI) has the same TCI state ID as one or more TCI state / TCI state pairs of one or more TCI state code points activated by the first MAC CE command).

[0357] According to the instruction of the network, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of the TCI state code point activated by the first MAC CE command or the TCI state / TCI state pair with the lowest (or highest) TCI state ID, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest TCI state ID; otherwise, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to the TCI state code point activated by the first MAC CE command, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest TCI state ID; The second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs of TCI state code points activated by the CE command, or the TCI state / TCI state pair with the highest (or lowest) TCI state ID, the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI, or the TCI state / TCI state pair with the highest TCI state ID.

[0358] In another example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may be selected from Nc'≥1 (e.g., Nc'=8, 16, 32, etc.) TCI state code points activated by a MAC CE activation command different from the first MAC CE command, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc' may be (1) fixed, for example in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling. For this example, the UE will follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0359] Alternatively, the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the lowest (or highest) TCI state ID can be selected from Nc1≥1 (for example, Nc1=8, 16, 32, etc.) TCI state code points activated by the first MAC CE activation command, and the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI or the TCI state / TCI state pair with the highest (or lowest) TCI state ID can be selected from Nc2≥1 (for example, Nc2=8, 16, 32, etc.) TCI state code points activated by the second MAC CE activation command, where the activated TCI state code points in the first or second MAC CE command can correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI state, M=2 (or N=2) joint DL and UL TCI states or a pair of separate DL and UL TCI states. The M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI can correspond to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by the first MAC CE command, or a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by the second MAC CE command.

[0360] In the present disclosure, the number / value of Nc1 or Nc2 may be (1) fixed, for example, in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0361] In one example, if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by a first MAC CE command, the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI; if the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI corresponds to a joint DL and UL TCI state or a pair of separate DL and UL TCI states of a TCI state code point activated by a second MAC CE command, the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID. TCI state, the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI to update / replace the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0362] In another example, the UE may follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0363] In another example, the M=1 (or N=1) TCI states / TCI state pairs indicated in the second DCI may be selected from Nc'≥1 (e.g., Nc'=8, 16, 32, etc.) TCI state code points activated by a MAC CE activation command different from the first and second MAC CE commands, where the activated TCI state code points may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair, and the number / value of Nc' may be (1) fixed, for example in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling. For this example, the UE can follow the examples of the present disclosure to determine which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI can be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the second DCI.

[0364] In another example, the UE can first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format in a first DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later in time, the UE may receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point, such as a TCI field or a separate TCI field, or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format in a second DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation).

[0365] For example, a one-bit flag indicator may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI. A one-bit flag indicator may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI state update for multiple TRPs".

[0366] Alternatively, one or more bits of one or more existing / reserved DCI fields (e.g., NDI fields) may be reused / used to indicate a one-bit flag indicator. If the one-bit flag indicator is set to "0" (or "1") or is not flipped (or flipped), then when the one-bit flag indicator is indicated by NDI, the UE shall apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI. If the single-bit flag indicator is set to "1" (or "0") or flipped (or not flipped), then when the single-bit flag indicator is indicated by NDI, the UE shall apply the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0367] For another example, the UE may receive a second DCI in a CORESET associated with a value of CORESETPoolIndex or a value of a CORESET group index according to those specified in the examples of the present disclosure. If the UE receives a second DCI in a CORESET associated with a value of 0 (or 1) for CORESETPoolIndex or a value of 0 (or 1) for CORESET group index, the UE shall apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI; if the UE receives a second DCI in a CORESET associated with a value of 0 (or 1) for CORESETPoolIndex or a value of 0 (or 1) for CORESET group index, the UE shall apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI; If a second DCI is received from a CORESET associated with the value of CORESET Group Index being 1 (or 0) or the value of CORESET Group Index being 1 (or 0), the UE shall apply the second (or first) TCI state / TCI state pair or the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI.

[0368] For another example, a bitmap may be included / indicated / configured in a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation for beam indication), for example, via the DCI field "TCI status update for multiple TRPs".

[0369] Alternatively, one or more bits of one or more existing / reserved DCI fields may be reused / used to indicate a bitmap. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the first DCI may be replaced / updated by one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the second DCI. In this example, the bitmap has two entries / bit positions. If the first (or second) entry / bit position of the bitmap is set to "1", the UE will apply the first (or second) TCI state / TCI state pair or the TCI state / TCI state pair with the lowest (or highest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI, and If the second (or first) entry / bit position of the bitmap is set to "1", the UE can apply the second (or first) TCI state / TCI state pair and the TCI state / TCI state pair with the highest (or lowest) TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the second DCI to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the first DCI.

[0370] In yet another example, as previously discussed, a DCI format (e.g., DCI format 1_1 or 1_2 with or without DL allocation) can indicate / include a first "transmission configuration indication" field (or represented by the first TCI field or TCI field 1) indicating a first TCI state code point, and a second "transmission configuration indication" field (represented by the second TCI field or TCI field 2) indicating a second TCI state code point. In one example, the first TCI field or the second TCI field can be a new and dedicated TCI field added / configured in DCI format 1_1 or 1_2 (with or without DL allocation), which is different from the existing DCI field configured therein. In another example, the first TCI field or the second TCI field can correspond to the existing "transmission configuration indication" field in DCI format 1_1 or 1_2 (with or without DL allocation).

[0371] In yet another example, the first TCI field or the second TCI field can be configured (with or without DL allocation) by reusing one or more bits of one or more of the existing / reserved DCI fields in DCI format 1_1 or 1_2. The first TCI state code point of the first TCI field may be selected / determined from Nc1≥1 (e.g., Nc1=8, 16, 32, etc.) TCI state code points activated by a first MAC CE activation command, wherein the activated TCI state code point may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair; and the first TCI state code point of the second TCI field may be selected / determined from Nc2≥1 (e.g., Nc2=8, 16, 32, etc.) TCI state code points activated by a second MAC CE activation command, wherein the activated TCI state code point may correspond to a joint DL and UL TCI state, a pair of separate DL and UL TCI states, M=2 (or N=2) joint DL and UL TCI states, or a separate DL and UL TCI state pair. In the present disclosure, the number / value of Nc1 or Nc2 may be (1) fixed, for example, in the system specification, or (2) provided by the network via higher layer RRC signaling and / or MAC CE commands and / or dynamic DCI-based signaling.

[0372] For example, the first TCI state code point of the first TCI field indicated by the first DCI is different from the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is the same as the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0373] For another example, the first TCI state code point of the first TCI field indicated by the first DCI is the same as the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is different from the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0374] For another example, the first TCI state code point of the first TCI field indicated by the first DCI is different from the first TCI state code point of the first TCI field indicated by the second DCI; and the second TCI state code point of the second TCI field indicated by the first DCI is also different from the second TCI state code point of the second TCI field indicated by the second DCI. The second DCI may be received later in time than the first DCI, for example, the first DCI is a previous DCI received in time relative to the second DCI.

[0375] In yet another example, the UE may first receive M=2 (or N=2) TCI states / TCI state pairs indicated by a TCI state code point such as a TCI field or a separate TCI field in a DCI (e.g., DCI format 1_1 or 1_2 with or without DL allocation), or reuse one or more bits of one or more existing / reserved DCI fields in the corresponding DCI format. Later, the UE may receive a MAC CE indicating M=1 (or N=1) TCI states / TCI state pairs selected / activated from one or more lists / pools of TCI states / TCI state pairs configured by RRC to update one of the M=2 (N=2) TCI states / TCI state pairs indicated in the DCI. A first bit flag indicator may be included / indicated / configured in the MAC CE activation command to indicate to the UE whether the (M=1 or N=1) TCI state / TCI state pair indicated in the MAC CE activation command is for single TRP operation or to update one of the (M=2 or N=2) TCI state / TCI state pairs previously indicated in the corresponding DCI format. For example, if the first bit flag indicator is set to "0" (or "1"), the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals of higher layers configured to follow / share the TCI state / TCI state pair indicated in the MAC CE command. Otherwise, that is, if the first one-bit flag indicator is set to "1" (or "0"), the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI. The first one-bit flag indicator may be applied to one or more of the following design examples.

[0376] For example, when the first one-bit flag indicator is set to "1" (or "0") according to the above discussion, a second one-bit flag indicator may be included / indicated / configured in the MAC CE activation command to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI may be replaced / updated by the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command. If the second one-bit flag indicator is set to "0" (or "1"), the UE will apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command to update / replace the first TCI state / TCI state pair or the TCI state / TCI state pair with the lowest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI. If the second one-bit flag indicator is set to "1" (or "0"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE activation command to update / replace the second TCI state / TCI state pair or the TCI state / TCI state pair with the highest TCI state ID among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI. For this design example, the second one-bit flag indicator may also correspond to a CORESETPoolIndex or a CORESET group index specified according to the examples in the present disclosure.

[0377] For another example, a one-bit flag indicator may be included / indicated / configured in the MAC CE activation command. If the one-bit flag indicator is not configured / enabled in the MAC CE command, the UE shall apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE activation command for single TRP operation, i.e., for all UE-specific reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic grant / configuration grant, or other channels / signals configured by higher layers to follow / share the TCI states / TCI state pairs indicated in the MAC CE command.

[0378] Otherwise, if the one-bit flag indicator is set to "0" (or "1"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pairs indicated in the MAC CE activation command to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the lowest TCI state ID. If the one-bit flag indicator is set to "1" (or "0"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pairs indicated in the MAC CE activation command to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the highest TCI state ID. For this design example, the one-bit flag indicator may also correspond to a CORESETPoolIndex or a CORESET group index specified according to the examples in the present disclosure.

[0379] For another example, a two-bit indicator may be included / indicated / configured in the MAC CE activation command. If the 2-bit indicator is set to "00" (or "01" or "10" or "11"), the UE will apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command for single TRP operation, i.e., for all UE-dedicated reception on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or other channels / signals of higher layers configured to follow / share the TCI state / TCI state pair indicated in the MAC CE command. If the 2-bit indicator is set to "01" (or "00" or "10" or "11"), the UE may apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace one of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI. If the 2-bit indicator is set to "10" (or "00" or "01" or "11"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the first TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the lowest TCI state ID. If the 2-bit indicator is set to "11" (or "00" or "01" or "10"), the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the second TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the highest TCI state ID.

[0380] For another example, a bitmap may be included / indicated / configured in a MAC CE activation command. The bitmap may be used to indicate to the UE which of the M=2 (or N=2) TCI states / TCI state pairs indicated in the DCI may be replaced / updated by the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE activation command. In this example, the bitmap has two entries / bit positions. When the first bit flag indicator is set to "0" (or "1") or the bitmap is not configured / enabled according to the above discussion, the UE will apply the M=1 (or N=1) TCI states / TCI state pairs indicated in the MAC CE command for single TRP operation, i.e., for all UE-dedicated receptions on PDSCH / PDCCH, or PUSCH and all dedicated PUCCH resources based on dynamic authorization / configuration authorization, or other channels / signals of higher layers configured to follow / share the TCI states / TCI state pairs indicated in the MAC CE command.

[0381] Otherwise, when the first bit flag indicator is set to "1" (or "0") or the bitmap is configured / enabled as discussed above: if the first entry / bit position of the bitmap is set to "1", the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the first (or second) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the lowest (or highest) TCI state ID, and if the second entry / bit position of the bitmap is set to "1", the UE shall apply the M=1 (or N=1) TCI state / TCI state pair indicated in the MAC CE command to update / replace the second (or first) TCI state / TCI state pair among the M=2 (or N=2) TCI state / TCI state pairs indicated in the DCI or the TCI state / TCI state pair with the highest (or lowest) TCI state ID.

[0382] Throughout the present invention, unless otherwise specified, a TCI state may correspond to a joint TCI state, a DL TCI state, a UL TCI state, or a pair of two TCI states each corresponding to a joint TCI state or a DL TCI state or a UL TCI state.

[0383] In one embodiment, the UE may configure / provide / indicate M≥1 or N≥1 (e.g., M=2 or N=2) groups / lists of TCI states or TCI state IDs, for example, via higher layer RRC signaling and / or MAC CE commands and / or L1 signaling based on dynamic DCI, wherein each group / list contains / contains / includes one or more TCI states or TCI state IDs. The bit width of the TCI state ID in each group / list may be determined based on the total number of TCI states / TCI state IDs in the corresponding group / list. Alternatively, the bit width of the TCI state ID in each group / list may be determined based on the total number of TCI states / TCI state IDs across all configured groups / lists. In addition, the TCI state IDs in different groups / lists may not overlap, i.e., different groups / lists may not include / include / contain the same TCI state or TCI state ID. In addition, each group / list of TCI states or TCI state IDs may be configured with a (unique) TCI state group / list ID.

[0384] For example, an entity index / ID may be provided in a higher layer parameter (e.g., TCI-State or DLorJointTCI-State or UL-TCIState) that configures a joint / DL / UL TCI state as specified herein in the present disclosure. When / if the entity index / ID provided / configured in a higher layer parameter that configures one or more TCI states / TCI state IDs (as specified herein in the present disclosure) is the same or identical, the UE may determine / identify one or more TCI states / TCI state IDs in the (same) group of TCI states / TCI state IDs. In the present disclosure, the entity index / ID may correspond to at least one of the following: a PCI value, a PCI index pointing to an entry / PCI in a PCI list configured to the UE by a higher layer, a value of CORESETPoolIndex, a value of CORESETGroupIndex, a one-bit flag indicator, a TRPID, a TRP-specific higher layer signaling index, a CORESET ID, a resource ID / index, a resource set ID / index, etc. For example, for M=2 or N=2, the entity index / ID can be a one-bit flag indicator; when / if the entity index / ID associated with the TCI state (for example, the entity ID in the higher layer parameter TCI-State that configures / provides the TCI state) is set to "0" (or "1"), the UE is able to determine / identify that the TCI state / TCI state ID belongs to the first group of TCI states / TCI state IDs, and when / if the entity index / ID associated with the TCI state (for example, the entity ID in the higher layer parameter TCI-State that configures / provides the TCI state) is set to "1" (or "0"), the UE is able to determine / identify that the TCI state / TCI state ID belongs to the second group of TCI states / TCI state IDs.

[0385] As another example, for N=2 or M=2, the UE may first be provided / configured / indicated by the network, for example, via higher layer RRC signaling / parameters, a list of joint / DL (or UL) TCI states. In the higher layer RRC signaling / parameters that configure / provide the list of joint / DL (or UL) TCI states, the UE may be further configured / provided / indicated by the network the number of TCI states / TCI state IDs of the first group of TCI states / TCI state IDs in the list (e.g., represented by Ngroup1) and / or the number of the second group of TCI states / TCI state IDs in the list (e.g., represented by Ngroup2). For this design example, the UE may identify / determine that the first Ngroup1 TCI states / TCI state IDs in the joint / DL (or UL) TCI state list belong to the first group of TCI states / TCI state IDs, and the remaining (or last Ngroup2) TCI states / TCI state IDs in the joint / DL (or UL) TCI state list belong to the second group of TCI states / TCI state IDs. Alternatively, the UE may identify / determine that the last Ngroup2 TCI states / TCI state IDs in the joint / DL (or UL) TCI state list belong to the second group of TCI states / TCI state IDs, and the remaining (or first Ngroup1) TCI states / TCI state IDs in the joint / DL (or UL) TCI state list belong to the first group of TCI states / TCI state IDs. When N>2 (or M>2) groups of TCI states / TCI state IDs are configured, the above UE operation / behavior may be extended / applied.

[0386] For another example, for N=2 or M=2, the UE may first be provided / configured / indicated by the network, for example, via higher layer RRC signaling / parameters, a list of joint / DL (or UL) TCI states. In the higher layer RRC signaling / parameters that configure / provide the list of joint / DL (or UL) TCI states, the UE may be further configured / provided / indicated by the network the TCI state index / ID or the index of the TCI state index / ID of the first group of TCI states / TCI state IDs in the list and / or the TCI state index / ID or the index of the TCI state index / ID of the second group of TCI states / TCI state IDs in the list. When N>2 (or M>2) groups of TCI states / TCI state IDs are configured, the above-mentioned UE operations / behaviors may be extended / applied.

[0387] When the UE is provided / configured by a higher layer of the network with M≥1 or N≥1 (e.g., M=2 or N=2) groups of TCI states in a joint / DL (or UL) TCI state list, and when the UE receives a fallback DCI (e.g., in DCI format 1_0 or 0_1) scheduling PDSCH or PUSCH from the network, the UE may assume / determine / identify that all TCI states activated / indicated by the beam indication / activation MAC CE or DCI are from the first group of TCI states or the second group of TCI states or the joint / DL (or UL) TCI state list.

[0388] For M=2 or N=2, the UE may be configured / provided / indicated by the network, for example, via higher layer RRC signaling and / or MAC CE commands and / or L1 signaling based on dynamic DCI, of a first group / list of I≥1 TCI states / TCI state IDs and a second group / list of J≥1 TCI states / TCI state IDs, as specified herein in the present disclosure. The first group / list may be configured with a first TCI state group / list ID, and the second group / list may be configured with a second TCI state group / list ID. For example, when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs in the corresponding group / list, the TCI state IDs in the first group / list may be {0, 1, ..., I-1}, and the TCI state IDs in the second group / list may be {0, 1, ..., J-1}. For another example, when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs across two configured groups / lists, the TCI state ID in the first group / list may be {0, 1,…, I-1}, while the TCI state ID in the second group / list may be {I, I+1,…, I+J-1}.

[0389] In the present disclosure as specified herein, a (unified) TCI state activation / indication MAC CE may provide / indicate / include / contain / configure / activate a set of up to K≥1 TCI state / TCI state pairs for mapping up to K≥1 TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation). The UE is able to receive one or more such (unified) TCI state activation / indication MAC CEs, for example, in a time slot or in a configured time period / window. In addition, the UE may maintain / track a first TCI state and a second TCI state for at least UE-dedicated reception and dynamic authorization / configuration authorization PUSCH transmission on PDSCH / PDCCH and all PUCCH transmissions in a multi-TRP system. For a set of TCI state / TCI state pairs (e.g., provided / indicated / configured in a beam indication / activation MAC CE or by one or more TCI code points of one or more TCI fields in a beam indication DCI), it contains / includes / contains a single TCI state / TCI state pair (referred to as TCI state in the following example).

[0390] In one example, a one-bit indicator may be provided / indicated / configured in a beam activation / indication MAC CE and associated with a set of TCI states / TCI state pairs and, therefore, with corresponding TCI states (and, therefore, corresponding eight-bit bytes in the MAC CE) in the present disclosure as specified herein. When the one-bit indicator is set to "0" (or "1"), the UE may identify / determine that the associated / corresponding TCI state is from a first group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the first TCI state, and when the one-bit indicator is set to "1" (or "0"), the UE may identify / determine that the associated / corresponding TCI state is from a second group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the second TCI state.

[0391] When a set of TCI states / TCI state pairs and therefore the corresponding TCI states are indicated by one or more TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation), a one-bit indicator may also be provided / indicated / configured in the DCI (e.g., beam indication DCI (new / dedicated DCI field or by reusing one or more bits of one or more existing DCI fields)) and associated with the set of TCI states / TCI state pairs and therefore the corresponding TCI states. The UE may identify / determine which one of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs the TCI state is selected / determined from, and / or which one of the first TCI state and / or the second TCI state is updated by the TCI state according to / based on the one-bit indicator in the DCI, following those described / specified herein in the present disclosure. This design example may be used when the bit width of the TCI state ID in each group / list is determined according to the total number of TCI states / TCI state IDs in the corresponding group / list.

[0392] In another example, the UE may be indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters (e.g., by setting / configuring the higher layer parameter InterCellSDCIMTRP to "enabled") and / or MAC CE command and / or L1 signaling based on dynamic DCI, that inter-cell SDCI-based MTRP operation is enabled, and / or indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI, that the list / set / pool of PCIs includes at least one PCI other than the serving cell PCI. For this case, a one-bit indicator may be provided / indicated / configured in the beam activation / indication MAC CE, and the one-bit indicator may be associated with a set of TCI states / TCI state pairs, and thus with the corresponding TCI states (and thus, the corresponding eight-bit bytes in the MAC CE), as specified herein in the present disclosure, and each value of the one-bit indicator may correspond to a PCI in the list / set / pool of PCIs or a PCI index pointing to an entry / PCI. When the one-bit indicator is set to "0" (or "1"), the UE may identify / determine that the associated / corresponding TCI state is from the serving cell PCI and / or from the first group / list of TCI states / TCI state IDs associated / corresponding to the serving cell PCI (e.g., by indicating / providing the serving cell PCI / PCI index in a higher layer parameter configuring the first group / list of TCI states / TCI state IDs), and / or apply the associated / corresponding TCI state to update the first TCI state and / or at least for UE-specific reception on PDCCH / PDSCH and / or dynamically grant / configure grant of PUSCH and all PUCCH transmissions associated with the serving cell PCI, and when the one-bit indicator is set to "1" (or "0"), the UE may identify / determine that the associated / corresponding TCI state is from the serving cell PCI and / or from the first group / list of TCI states / TCI state IDs associated / corresponding to the serving cell PCI (e.g., by indicating / providing the serving cell PCI / PCI index in a higher layer parameter configuring the first group / list of TCI states / TCI state IDs), and / or apply the associated / corresponding TCI state to update the first TCI state and / or at least for UE-specific reception on PDCCH / PDSCH and / or dynamically grant / configure grant of PUSCH and all PUCCH transmissions associated with the serving cell PCI. ), the UE may identify / determine that the associated / corresponding TCI state is from a PCI other than the serving cell PCI and / or from a second group / list of TCI states / TCI state IDs associated / corresponding to a PCI other than the serving cell PCI (e.g., by indicating / providing a PCI / PCI index other than the serving cell PCI / PCI index in a higher layer parameter configuring the second group / list of TCI states / TCI state IDs), and / or apply the associated / corresponding TCI state to update the second TCI state and / or at least for UE-specific reception on PDCCH / PDSCH and / or dynamic authorization / configuration authorization of PUSCH and all PUCCH transmissions associated with a PCI other than the serving cell PCI.When a set of TCI states / TCI state pairs, and therefore the corresponding TCI states, are indicated by one or more TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation), a one-bit indicator as specified herein in the present disclosure may also be provided / indicated / configured in the DCI (e.g., beam indication DCI (new / dedicated DCI field or by reusing one or more bits of one or more existing DCI fields)) and associated with the set of TCI states / TCI state pairs, and therefore the corresponding TCI states.

[0393] The UE may identify / determine which of the serving cell PCI / PCI index and the PCI / PCI index other than the serving cell PCI / PCI index the indicated TCI state is associated with / from which one and / or which one of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs to select / determine which of the TCI state and / or the first TCI state and / or the second TCI state is updated by the TCI state according to / based on a one-bit indicator in the DCI. This design example may be used when the bit width of the TCI state ID in each group / list is determined according to the total number of TCI states / TCI state IDs in the corresponding group / list.

[0394] In yet another example, the UE may be indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters (e.g., by setting / configuring the higher layer parameter InterCellSDCIMTRP to “enabled”) and / or MAC CE command and / or L1 signaling based on dynamic DCI, that inter-cell SDCI-based MTRP operation is enabled, and / or indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI, that the list / set / pool of PCIs includes at least one PCI other than the serving cell PCI. For this design example, a PCI value or a PCI index (pointing to an entry / PCI in the list / set / pool of PCIs) may be provided / indicated / configured in a beam activation / indication MAC CE and associated with a set of TCI states / TCI state pairs, and therefore associated with the corresponding TCI states (and therefore, the corresponding octets in the MAC CE), as specified herein in the present disclosure. When the PCI value corresponds to a serving cell PCI or a PCI index corresponds to a serving cell PCI index (e.g., pointing to a serving cell PCI in a list / set / pool of PCIs), the UE may identify / determine that the associated / corresponding TCI state is from the serving cell PCI and / or from a first group / list of TCI states / TCI state IDs associated / corresponding to the serving cell PCI (e.g., by indicating / providing the serving cell PCI / PCI index in a higher layer parameter configuring the first group / list of TCI states / TCI state IDs), and / or apply the associated / corresponding TCI state to update the first TCI state and / or at least for UE-specific reception on PDCCH / PDSCH and / or dynamically grant / configure grant of PUSCH and all PUCCH transmissions associated with the serving cell PCI, and when the PCI value corresponds to a PCI other than the serving cell PCI or a PCI When the index corresponds to a PCI other than the serving cell PCI index (for example, pointing to a PCI other than the serving cell PCI in a list / set / pool of PCIs), the UE can identify / determine that the associated / corresponding TCI state is from a PCI other than the serving cell PCI and / or from a second group / list of TCI states / TCI state IDs associated / corresponding to the PCI other than the serving cell PCI (for example, by indicating / providing a PCI / PCI index other than the serving cell PCI / PCI index in a higher layer parameter configuring the second group / list of TCI states / TCI state IDs), and / or apply the associated / corresponding TCI state to update the second TCI state and / or at least for UE-dedicated reception on PDCCH / PDSCH and / or dynamic authorization / configuration authorization of PUSCH and all PUCCH transmissions associated with a PCI other than the serving cell PCI.

[0395] When a set of TCI states / TCI state pairs and therefore the corresponding TCI states are indicated by one or more TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation), a PCI value or PCI index pointing to an entry / PCI in a set / list / pool of PCIs may also be provided / indicated / configured in the DCI (e.g., beam indication DCI (new / dedicated DCI field or by reusing one or more bits of one or more existing DCI fields)) and associated with the set of TCI states / TCI state pairs and therefore the corresponding TCI states. The UE may identify / determine which of the serving cell PCI / PCI index and the PCI / PCI index other than the serving cell PCI / PCI index the indicated TCI state is associated with / from which one and / or select / determine which of the TCI state and / or the first TCI state and / or the second TCI state is updated by the TCI state from / from which one of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs, following those described / specified herein in the present disclosure. This design example may be used when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs in the corresponding group / list.

[0396] In another example, a TCI state group / list ID may be provided / indicated / configured in a beam activation / indication MAC CE and associated with a set of TCI state / TCI state pairs and, therefore, associated with corresponding TCI states (and, therefore, corresponding octets in the MAC CE) as specified herein in the present disclosure. When the TCI state group / list ID corresponds to a first TCI state group / list ID as specified herein in the present disclosure, the UE may identify / determine that the associated / corresponding TCI state is from the first group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the first TCI state, and when the TCI state group / list ID corresponds to a second TCI state group / list ID as specified herein in the present disclosure, the UE may identify / determine that the associated / corresponding TCI state is from the second group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the second TCI state. When a set of TCI states / TCI state pairs and therefore the corresponding TCI states are indicated by one or more TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation), the TCI state group / list ID may also be provided / indicated / configured in the DCI (e.g., beam indication DCI (new / dedicated DCI field or by reusing one or more bits of one or more existing DCI fields)) and associated with the set of TCI states / TCI state pairs and therefore the corresponding TCI states.

[0397] The UE may identify / determine which of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs the TCI state is selected / determined from, and / or which of the first TCI state and / or the second TCI state is updated by the TCI state according to / based on the TCI state group / list ID in the DCI. This design example may be used when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs in the corresponding group / list. Here, the TCI state group / list ID may correspond to a PCI or a PCI index (pointing to an entry / PCI in a list / set / pool of PCIs). when the UE is indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters (e.g. by setting / configuring the higher layer parameter InterCellSDCIMTRP to “enabled”) and / or MAC CE command and / or L1 signaling based on dynamic DCI, that inter-cell SDCI based MTRP operation is enabled, and / or indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI, a list / set / pool of PCIs comprising at least one PCI other than the serving cell PCI, and / or indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI; CE command and / or dynamic DCI-based L1 signaling, when the TCI state group / list ID in each group / list of TCI states corresponds to a PCI in a list / set / pool of PCIs or a PCI index pointing to an entry / PCI, the UE may follow those specified in the present disclosure as specified herein, for example, those specified in the examples of the present disclosure, to use / apply the configured / activated / indicated TCI states for SDCI-based inter-cell MTRP operation.

[0398] In yet another example, a bitmap of length two (e.g., represented by [xy], where x=0 or 1 and y=0 or 1) may be provided / indicated / configured in a beam activation / indication MAC CE and associated with a set of TCI state / TCI state pairs and, therefore, associated with corresponding TCI states as specified herein in the present disclosure (and, therefore, corresponding octets in the MAC CE). When the bitmap is set to [1 0], the UE may identify / determine that the associated / corresponding TCI state is from a first group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the first TCI state, and when the bitmap is set to [0 1], the UE may identify / determine that the associated / corresponding TCI state is from a second group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the second TCI state. When a set of TCI states / TCI state pairs and therefore the corresponding TCI states are indicated by one or more TCI code points of one or more TCI fields in a beam indication DCI (e.g., DCI format 1_1 / 1_2 with or without DL allocation), a bitmap may also be provided / indicated / configured in a DCI (e.g., a beam indication DCI (new / dedicated DCI field or by reusing one or more bits of one or more existing DCI fields)) and associated with the set of TCI states / TCI state pairs and therefore the corresponding TCI states.

[0399] The UE may identify / determine which of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs the TCI state is selected / determined from, and / or which of the first TCI state and / or the second TCI state is updated by the TCI state according to / based on the bitmap in the DCI, following those described / specified herein in the present disclosure. This design example may be used when the bit width of the TCI state ID in each group / list is determined according to the total number of TCI states / TCI state IDs in the corresponding group / list. Here, a bitmap of [1 0] may correspond to a PCI or a PCI index (pointing to an entry / PCI in a list / set / pool of PCIs), such as a serving cell PCI / PCI index, and a bitmap of [0 1] may correspond to another PCI or another PCI index (pointing to another entry / PCI in a list / set / pool of PCIs), such as a PCI / PCI index other than a serving cell PCI / PCI index. When the UE is indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters (e.g. by setting / configuring the higher layer parameter InterCellSDCIMTRP to “enabled”) and / or MAC CE command and / or L1 signaling based on dynamic DCI, inter-cell SDCI based MTRP operation is enabled, and / or indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI, a list / set / pool of PCIs comprising at least one PCI other than the serving cell PCI, and / or indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI,

[10] or

[11] . 1] corresponds to a PCI in a list / set / pool of PCIs or a PCI index pointing to an entry / PCI, the UE may follow those specified in the present disclosure as specified herein (e.g., those specified in the examples of the present disclosure) to use / apply the configured / activated / indicated TCI states for SDCI-based inter-cell MTRP operations.

[0400] In yet another example, a set of TCI states / TCI state pairs in a beam indication / activation MAC CE may correspond to a group of two or more (contiguous) MAC CE entries (e.g., an octet in a corresponding MAC CE) or may be indicated / provided / configured by a group of two or more (contiguous) MAC CE entries (e.g., an octet in a corresponding MAC CE). Here, in the present disclosure, a set of TCI states / TCI state pairs as specified herein may correspond to a group of a first MAC CE entry (e.g., a first octet) and a second MAC CE entry (e.g., a second octet) or may be indicated / provided / configured by a group of a first MAC CE entry (e.g., a first octet) and a second MAC CE entry (e.g., a second octet); the first MAC CE entry (or the first octet) and the second MAC CE entry (or the second octet) may be contiguous in the corresponding beam indication / activation MAC CE. When the first MAC CE entry (or the first octet) contains / provides / indicates the ID of the TCI state as specified in the present disclosure as herein and the second MAC CE entry (or the second octet) does not contain / provides / indicates any TCI state ID or contains / provides / indicates "empty" or an invalid value, the UE can identify / determine that the TCI state is from the first group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the first TCI state, and when the second MAC CE entry (or the second octet) contains / provides / indicates the ID of the TCI state as specified in the present disclosure as herein and the first MAC CE entry (or the first octet) does not contain / provides / indicates any TCI state ID or contains / provides / indicates "empty" or an invalid value, the UE can identify / determine that the TCI state is from the second group / list of TCI states / TCI state IDs and / or apply the associated / corresponding TCI state to update the second TCI state.

[0401] This design example may be used when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs in the corresponding group / list. This design example may be used when the bit width of the TCI state ID in each group / list is determined based on the total number of TCI states / TCI state IDs in the corresponding group / list. For this design example, a first group / list of TCI states / TCI state IDs may be associated with a PCI in a list / set / pool of PCIs or a PCI index pointing to an entry / PCI (e.g., a serving cell PCI / PCI index as specified herein in the present disclosure), and a second group / list of TCI states / TCI state IDs may be associated with another PCI or PCI index pointing to another entry / PCI in a list / set / pool of PCIs (e.g., a PCI / PCI index other than a serving cell PCI / PCI index as specified herein in the present disclosure). When the UE is indicated / provided / configured by the network, e.g. via higher layer RRC signaling / parameters (e.g., by setting / configuring the higher layer parameter InterCellSDCIMTRP to "enabled") and / or MAC CE command and / or L1 signaling based on dynamic DCI, inter-cell SDCI-based MTRP operation is enabled, and / or a list / set / pool of PCIs including at least one PCI other than the serving cell PCI is indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI, and / or a list / set / pool of PCIs including at least one PCI other than the serving cell PCI is indicated / provided / configured by the network, e.g., via higher layer RRC signaling / parameters and / or MAC CE command and / or L1 signaling based on dynamic DCI. When the CE command and / or the dynamic DCI-based L1 signaling is indicated / provided / configured by the network, each of the first and second groups / lists of TCI states / TCI state IDs is associated with a PCI in a list / set / pool of PCIs or a PCI index pointing to an entry / PCI, and the PCI or PCI index of an entry / PCI in the first and second groups / lists of TCI states / TCI state IDs is associated, the UE may follow those specified in the present disclosure as specified herein, such as those specified in the examples of the present disclosure. According to an embodiment of the present disclosure, the configured / activated / indicated TCI states may be used / applied for SDCI-based inter-cell MTRP operation.

[0402] In yet another example, when the bit width of the TCI state ID in each group / list is determined, for example, based on the total number of TCI states / TCI state IDs across two configured groups / lists, the UE may identify which of the first group / list of TCI states / TCI state IDs and / or the second group / list of TCI states / TCI state IDs the TCI state is selected / determined from and / or which of the first TCI state and / or the second TCI state is updated by the TCI state based on / based on the ID of the TCI state as specified herein in the present disclosure. For example, the first group / list may contain / include / contain TCI state IDs ranging from #0 to #7, and the second group / list may contain / include / contain TCI state IDs ranging from #8 to #15. If the ID of the TCI state as specified herein in the present disclosure is #4, the UE may identify that the TCI state as specified herein in the present disclosure is selected / determined from the first group / list of TCI states / TCI state IDs.

[0403] When / if the UE can identify the TCI state as specified in the present disclosure as selected / determined from a first group / list of TCI states / TCI state IDs according to / based on the ID of the TCI state as specified in the present disclosure, the UE can apply the TCI state to update the first TCI state. When / if the UE can identify the TCI state as specified in the present disclosure as selected / determined from a second group / list of TCI states / TCI state IDs according to / based on the ID of the TCI state as specified in the present disclosure, the UE can apply the TCI state to update the second TCI state. For this design example, a first group / list of TCI states / TCI state IDs may be associated with a PCI in a list / set / pool of PCIs or a PCI index pointing to an entry / PCI (e.g., a serving cell PCI / PCI index as specified herein in the present disclosure), and a second group / list of TCI states / TCI state IDs may be associated with another PCI or PCI index pointing to another entry / PCI in the list / set / pool of PCIs (e.g., a PCI / PCI index other than the serving cell PCI / PCI index as specified herein in the present disclosure).

[0404] When the UE is indicated / provided / configured by the ...

Claims

1. A user equipment (UE), include: The transceiver is configured as: receiving a first indicator associated with one or more transmission configuration indication (TCI) states in radio resource control (RRC) signaling; receiving, in a medium access control (MAC) control element (CE), a second indicator of a TCI code point including a first TCI state or a second TCI state; receiving scheduling information for a first physical downlink shared channel (PDSCH) in downlink control information (DCI); and Based on a first application TCI state or a second application TCI state, receiving the first PDSCH; and a processor operably coupled to the transceiver, the processor being configured to: identifying at least one of a first set of TCI states or a second set of TCI states based on the first indicator; determining whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state based on the second indicator; and Based on the identification and the second indicator, it is determined whether the first TCI state and the second TCI state belong to the first set of TCI states or the second set of TCI states.

2. The UE according to claim 1, in: The processor is further configured to determine the presence or absence of a third indicator in the DCI based on the identifying, and When the third indicator is determined to be present, the third indicator indicates whether to receive the first PDSCH using the first application TCI state or the second application TCI state.

3. The UE according to claim 2, in: The third indicator is determined to be absent when only one of the first set of TCI states or the second set of TCI states is identified; and The third indicator is determined to be present when both the first set of TCI states and the second set of TCI states are identified.

4. The UE according to claim 1, in, The first indicator is one of: (i) an index in a higher layer parameter TCI-State, (ii) the number of TCI states in the first group of TCI states or the second group of TCI states, and (iii) an index or identification (ID) of the TCI state in the first group of TCI states or the second group of TCI states.

5. The UE according to claim 1, in, The second indicator indicates one of: (i) the presence or absence of the second TCI state, and (ii) when the second TCI state does not exist, whether the first TCI state updates the first application TCI state or the second application TCI state, and in: When the second TCI state exists, the transceiver is further configured to receive a second PDSCH based on the first TCI state and the second TCI state; When the second TCI state does not exist and the first TCI state is to update the first application TCI state, the transceiver is further configured to receive the second PDSCH based on the first TCI state and the second application TCI state; and When the second TCI does not exist and the first TCI state is to update the second application TCI state, the transceiver is further configured to receive the second PDSCH based on the first TCI state and the first application TCI state.

6. The UE according to claim 1, in: The transceiver is further configured to receive a triggering condition to activate one or more aperiodic channel state information (CSI) reference signals (RS) for measurement; The RRC signaling includes a third indicator; and The processor is also configured to determine whether to receive the one or more aperiodic CSI-RS using the first application TCI state or the second application TCI state based on the third indicator.

7. A base station (BS), include: The transceiver is configured as: sending a first indicator associated with one or more transmission configuration indication (TCI) states in radio resource control (RRC) signaling; sending a second indicator of a TCI code point including a first TCI state or a second TCI state in a medium access control (MAC) control element (CE); sending scheduling information for a first physical downlink shared channel (PDSCH) in downlink control information (DCI); and Based on the first application TCI state or the second application TCI state, the first PDSCH is sent for receiving; wherein the first indicator provides an indication of at least one of the first set of TCI states or the second set of TCI states, The second indicator indicates whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state, and The indication and the second indicator indicate whether the first TCI state and the second TCI state belong to the first group of TCI states or the second group of TCI states.

8. The BS according to claim 7, in: The indication further indicates the presence or absence of a third indicator in the DCI, and When the third indicator is indicated as being present, the third indicator indicates whether the first application TCI state or the second application TCI state is used for the first PDSCH, and in: When only one of the first set of TCI states or the second set of TCI states is indicated, the third indicator is indicated as not present; and The third indicator is indicated as being present when both the first set of TCI states and the second set of TCI states are indicated.

9. The BS according to claim 7, in, The first indicator is one of: (i) an index in a higher layer parameter TCI-State, (ii) the number of TCI states in the first group of TCI states or the second group of TCI states, and (iii) an index or identification (ID) of the TCI state in the first group of TCI states or the second group of TCI states.

10. The BS according to claim 7, in, The second indicator indicates one of: (i) the presence or absence of the second TCI state, and (ii) when the second TCI state does not exist, whether the first TCI state updates the first application TCI state or the second application TCI state, and in: The presence of the second TCI state indicates that the first TCI state and the second TCI state are used for a second PDSCH; The second TCI state does not exist and the first TCI state is to update the first application TCI state to indicate that the first TCI state and the second application TCI state are to be used for the second PDSCH; and The absence of the second TCI and the first TCI state to update the second application TCI state indicate that the first TCI state and the first application TCI state are used for the second PDSCH.

11. The BS according to claim 7, in: The transceiver is further configured to send a trigger condition to activate one or more aperiodic channel state information (CSI) reference signals (RS) for measurement; The RRC signaling includes a third indicator; and The third indicator indicates whether the first applied TCI state or the second applied TCI state is used for the one or more aperiodic CSI-RSs.

12. A method performed by a user equipment (UE), the method include: receiving a first indicator associated with one or more transmission configuration indication (TCI) states in radio resource control (RRC) signaling; receiving, in a medium access control (MAC) control element (CE), a second indicator of a TCI code point including a first TCI state or a second TCI state; receiving scheduling information for a first physical downlink shared channel (PDSCH) in downlink control information (DCI); Receiving the first PDSCH based on a first application TCI state or a second application TCI state; identifying at least one of a first set of TCI states or a second set of TCI states based on the first indicator; determining, based on the second indicator, whether the first TCI state or the second TCI state updates the first application TCI state or the second application TCI state; as well as Based on the identification and the second indicator, it is determined whether the first TCI state and the second TCI state belong to the first set of TCI states or the second set of TCI states.

13. The method according to claim 12, further comprising: include: determining the presence or absence of a third indicator in the DCI based on the identifying, Wherein, when the third indicator is determined to exist, the third indicator indicates whether to use the first application TCI state or the second application TCI state to receive the first PDSCH, and in: The third indicator is determined to be absent when only one of the first set of TCI states or the second set of TCI states is identified; and The third indicator is determined to be present when both the first set of TCI states and the second set of TCI states are identified.

14. The method according to claim 12, in, The first indicator is one of: (i) an index in a higher layer parameter TCI-State, (ii) the number of TCI states in the first group of TCI states or the second group of TCI states, and (iii) an index or identification (ID) of the TCI state in the first group of TCI states or the second group of TCI states.

15. The method according to claim 12, in, The second indicator indicates one of: (i) the presence or absence of the second TCI state, and (ii) when the second TCI state does not exist, whether the first TCI state updates the first application TCI state or the second application TCI state, and the method further includes: When the second TCI state exists, receiving a second PDSCH based on the first TCI state and the second TCI state; When the second TCI state does not exist and the first TCI state is to update the first application TCI state, receiving the second PDSCH based on the first TCI state and the second application TCI state; or When the second TCI does not exist and the first TCI state is to update the second application TCI state, the second PDSCH is received based on the first TCI state and the first application TCI state.

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