Node in wireless communication system, user equipment and method performed by same

Abstract

The invention provides a node in a wireless communication system, user equipment and a method performed by the same. A method performed by a user equipment (UE) in a wireless communication system includes: receiving first information from a first node, the first information including third information related to a number of reference signals and / or fourth information related to a time domain interval of the reference signals; and receiving a physical downlink shared channel (PDSCH) transmission from the first node, where the PDSCH transmission is scheduled for transmission over a plurality of time slots, where the reference signal is used for demodulation of the PDSCH transmission.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and more specifically, to nodes, user equipment, and methods for performing such operations in wireless communication systems. Background Technology

[0002] Given the successive generations of wireless communication development, these technologies have primarily been developed for human-oriented services such as voice calls, multimedia services, and data services. With the commercialization of 5th-generation (5G) communication systems, the number of connected devices is expected to grow exponentially. These will increasingly connect to communication networks. Examples of the Internet of Things (IoT) can include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve in various forms, such as augmented reality glasses, virtual reality headsets, and holographic devices. Efforts are underway to develop improved 6G communication systems to provide a wide range of services by connecting hundreds of billions of devices and things in the sixth-generation (6G) era.

[0003] The 6G communication system, expected to be commercially available around 2030, will offer significant improvements in all aspects compared to existing 5G systems. Its peak speed will reach at least 50 Gbit / s, user experience speed will reach at least 300 Mbit / s, air interface latency will be less than 1 ms, and air interface reliability will reach 10^(-5). In addition to these fundamental communication indicators, the 6G communication system will also possess sensing capabilities, AI-related capabilities, and better security, interoperability, and sustainability.

[0004] To achieve the aforementioned performance indicators for 6G communication systems, more advanced air interface and network technologies are needed. Currently, the evolution of extreme multiple input multiple output (MIMO) is being considered, including the use of very large-scale antenna arrays, the development and evolution of distributed antenna systems, and the design of MIMO air interface algorithms assisted by artificial intelligence (AI). This technology can achieve higher spectral efficiency, greater coverage, and more precise positioning and sensing capabilities. Furthermore, technologies that contribute to improving high-frequency coverage, including metamaterial-based lenses and antennas, novel antenna architectures, and reconfigurable intelligence surfaces (RIS), also require further evolution and development.

[0005] To meet the new functionalities added to 6G communication systems, it is necessary to develop new technologies in areas such as network energy saving, air interface security, and network security, while also studying the feasibility of converged technologies such as integrated communication and sensing.

[0006] In addition, to improve spectrum efficiency and overall network performance, the following technologies have been developed for 6G communication systems: full-duplex technology to enable uplink and downlink transmissions to use the same frequency resources simultaneously; network technologies that utilize satellites, high-altitude platform stations (HAPS), etc., in a comprehensive manner; improved network architecture to support mobile base stations, etc., and to enable network operation optimization and automation; dynamic spectrum sharing technology based on spectrum usage prediction and conflict avoidance; the use of artificial intelligence (AI) in wireless communication to improve overall network operation by utilizing AI from the design phase of 6G development and internalizing end-to-end AI support functions; and next-generation distributed computing technologies that overcome the computing power limitations of user equipment (UE) by leveraging ultra-high-performance communication and computing resources (such as mobile edge computing (MEC), cloud, etc.) achievable on the network. Furthermore, efforts are continuing to enhance connectivity between devices, optimize networks, promote the software-defined networking of network entities, and increase the openness of wireless communications by designing new protocols to be used in 6G communication systems, developing mechanisms for achieving hardware-based secure environments and secure data use, and developing technologies for maintaining privacy.

[0007] The research and development of 6G communication systems, encompassing hyper-connectivity for both person-to-machine (P2M) and machine-to-machine (M2M) interactions, is expected to deliver the next wave of hyper-connected experiences. Specifically, services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas are anticipated to be provided through 6G communication systems. Furthermore, services such as remote surgery for enhanced security and reliability, industrial automation, and emergency response will be available via 6G communication systems, enabling the technology to be applied across a wide range of sectors including industry, healthcare, automotive, and home appliances. Summary of the Invention

[0008] Embodiments of the present disclosure provide a method performed by a user equipment (UE) in a wireless communication system, including: receiving first information from a first node, the first information including third information related to the number of reference signals and / or fourth information related to the time domain interval of the reference signals; and receiving a physical downlink shared channel (PDSCH) transmission from the first node, where the PDSCH transmission is scheduled for transmission over multiple time slots, and where the reference signals are used for demodulation of the PDSCH transmission.

[0009] According to an embodiment of the present disclosure, the third information includes the number M of the reference signals, where M satisfies any one of the following: M = 1; 1 < M < N; M = N, where N is the number of time slots of the multiple time slots for the PDSCH transmission.

[0010] According to an embodiment of the present disclosure, the fourth information includes the symbol interval of the reference signals, and the symbol interval includes at least one of the following: the number of symbols between two adjacent reference signals; the number of symbols for the PDSCH transmission between two adjacent reference signals.

[0011] According to an embodiment of the present disclosure, the first information further includes fifth information related to a mode for determining the symbol position of the reference signals, where the fifth information includes a first mode, and determining the symbol position of the reference signals based on the first mode includes at least one of the following: determining the symbol positions of the other reference signals except the first reference signal of the reference signals based on a first symbol position and a first time domain interval of the reference signals, where the first symbol position is the symbol position of the first reference signal of the reference signals in the first time slot for the PDSCH transmission; or determining the symbol positions of the other reference signals except the last reference signal of the reference signals based on a second symbol position and the first time domain interval of the reference signals, where the second symbol position is the symbol position of the last reference signal of the reference signals in the last time slot for the PDSCH transmission.

[0012] According to embodiments of this disclosure, the first time-domain interval is determined based on a first number of symbols and the number of reference signals, wherein the first number of symbols includes at least one of the following: the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the second symbol position; the number of symbols from the first symbol position to the previous symbol of the first reference signal in the first time slot used for the next scheduled PDSCH transmission; and the sum of the number of symbols used for PDSCH transmission in the plurality of time slots used for PDSCH transmission.

[0013] According to embodiments of this disclosure, the first symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the first time slot; the third or fourth symbol position in the first time slot; the Cth symbol position used for PDSCH transmission in the first time slot, where C is an integer greater than 1; and wherein the second symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the last time slot; the third or fourth symbol position in the last time slot; the Eth symbol position used for PDSCH transmission in the last time slot, where E is an integer greater than 1.

[0014] According to embodiments of this disclosure, when the symbol position of the first reference signal in the reference signal conflicts with other channels or signals, determining the symbol position of the reference signal based on the first mode further includes at least one of the following: determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a second time-domain interval based on the symbol position of the previous reference signal of the first reference signal and the determined symbol position; and determining the symbol position of the reference signal following the first reference signal based on the second time-domain interval; determining the symbol position of the first reference signal and the reference signals following it based on the symbol position of the previous reference signal of the first reference signal and a third time-domain interval, wherein the third time-domain interval is included in the fourth information or determined based on the first time-domain interval.

[0015] According to embodiments of this disclosure, the fourth information includes a time slot interval, wherein the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a second mode, wherein determining the symbol position of the reference signal based on the second mode includes determining at least one of the following as a time slot occupied by the reference signal: a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the number of reference signals; a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the time slot interval of the reference signals; and, in the event of an interruption in the PDSCH transmission, restarting the PDSCH transmission in a first time slot.

[0016] According to embodiments of this disclosure, in each of the time slots occupied by the reference signal, the symbol position of the reference signal includes at least one of the following: the first symbol position in the time slot used for the PDSCH transmission; the third or fourth symbol position in the time slot; the Fth symbol position in the time slot used for the PDSCH transmission, where F is an integer greater than 1.

[0017] According to an embodiment of this disclosure, the frequency domain pattern of the reference signal includes: for a reference signal, J code division multiplexing (CDM) groups and an orthogonal overlay code (OCC) with a frequency domain length of K are used, wherein J and K are positive integers, and the product of J and K is greater than or equal to a first threshold.

[0018] According to embodiments of this disclosure, for the same antenna port, the starting offset of the resource element (RE) position of the reference signal with an even reference signal index is different from the starting offset of the RE position of the reference signal with an odd reference signal index.

[0019] According to an embodiment of this disclosure, the method further includes: performing a measurement on a channel used for transmitting the PDSCH transmission; and sending the measurement result of the measurement to the first node, wherein the first information is determined based on the measurement result.

[0020] According to an embodiment of this disclosure, the method further includes: receiving a Channel State Information (CSI) report configuration related to the measurement result from the first node, the CSI report configuration including indication information related to the quantization of the measurement result, wherein the indication information includes information related to at least one of the following: one or more quantization levels for quantizing the measurement result, one or more threshold ranges corresponding to the one or more quantization levels, the number of the one or more quantization levels, and the quantization method of the measurement result.

[0021] According to an embodiment of the present disclosure, the measurement result includes a time-domain measurement result obtained based on the channel state information reference signal CSI-RS for time-domain measurement received from the first node, where the time-domain measurement result is determined based on the correlation between the channel estimation results of the CSI-RS on a first time unit and the channel estimation results of the CSI-RS on a second time unit.

[0022] According to an embodiment of the present disclosure, the first time unit and the second time unit are two different time units among all the time units occupied by the CSI-RS.

[0023] According to an embodiment of the present disclosure, the measurement result includes a frequency-domain measurement result obtained based on the channel state information reference signal CSI-RS for frequency-domain measurement received from the first node, where the frequency-domain measurement result is determined based on the correlation between the channel estimation results of the CSI-RS on a first frequency unit and the channel estimation results of the CSI-RS on a second frequency unit.

[0024] According to an embodiment of the present disclosure, the first frequency unit and the second frequency unit are two different frequency units among all the frequency units occupied by the CSI-RS.

[0025] According to an embodiment of the present disclosure, the CSI report configuration further includes a target quantization level, where the measurement result includes identification information of resources whose quantization level of the measured value meets the target quantization level.

[0026] An embodiment of the present disclosure provides a method performed by a first node in a wireless communication system, including: sending first information to a user equipment UE, where the first information includes third information related to the number of reference signals and / or fourth information related to the time-domain interval of the reference signals; and sending a physical downlink shared channel PDSCH transmission to the UE, where the PDSCH transmission is scheduled for transmission on multiple time slots, and the reference signals are used for demodulation of the PDSCH transmission.

[0027] According to an embodiment of the present disclosure, the third information includes the number M of the reference signals, where M satisfies any one of the following: M = 1; 1 < M < N; M = N, where N is the number of time slots of the multiple time slots for the PDSCH transmission.

[0028] According to an embodiment of the present disclosure, the fourth information includes the symbol interval of the reference signals, and the symbol interval includes at least one of the following: the number of symbols between two adjacent reference signals; the number of symbols for the PDSCH transmission between two adjacent reference signals.

[0029] According to embodiments of this disclosure, the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a first mode, and determining the symbol position of the reference signal based on the first mode includes at least one of the following: determining the symbol position of other reference signals in the reference signal besides the first reference signal based on a first symbol position and a first time-domain interval of the reference signal, wherein the first symbol position is the symbol position of the first reference signal in the reference signal in a first time slot used for PDSCH transmission; or determining the symbol position of other reference signals in the reference signal besides the last reference signal based on a second symbol position and a first time-domain interval of the reference signal, wherein the second symbol position is the symbol position of the last reference signal in the reference signal in a last time slot used for PDSCH transmission.

[0030] According to embodiments of this disclosure, the first time-domain interval is determined based on a first number of symbols and the number of reference signals, wherein the first number of symbols includes at least one of the following: the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the second symbol position; the number of symbols from the first symbol position to the previous symbol of the first reference signal in the first time slot used for the next scheduled PDSCH transmission; and the sum of the number of symbols used for PDSCH transmission in the plurality of time slots used for PDSCH transmission.

[0031] According to embodiments of this disclosure, the first symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the first time slot; the third or fourth symbol position in the first time slot; the Cth symbol position used for PDSCH transmission in the first time slot, where C is an integer greater than 1; and wherein the second symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the last time slot; the third or fourth symbol position in the last time slot; the Eth symbol position used for PDSCH transmission in the last time slot, where E is an integer greater than 1.

[0032] According to embodiments of this disclosure, when the symbol position of the first reference signal in the reference signal conflicts with other channels or signals, determining the symbol position of the reference signal based on the first mode further includes at least one of the following: determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a second time-domain interval based on the symbol position of the previous reference signal of the first reference signal and the determined symbol position; and determining the symbol position of the reference signal following the first reference signal based on the second time-domain interval; determining the symbol position of the first reference signal and the reference signals following it based on the symbol position of the previous reference signal of the first reference signal and a third time-domain interval, wherein the third time-domain interval is included in the fourth information or determined based on the first time-domain interval.

[0033] According to embodiments of this disclosure, the fourth information includes a time slot interval, wherein the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a second mode, wherein determining the symbol position of the reference signal based on the second mode includes determining at least one of the following as a time slot occupied by the reference signal: a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the number of reference signals; a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the time slot interval of the reference signals; and, in the event of an interruption in the PDSCH transmission, restarting the PDSCH transmission in a first time slot.

[0034] According to embodiments of this disclosure, in each of the time slots occupied by the reference signal, the symbol position of the reference signal includes at least one of the following: the first symbol position in the time slot used for the PDSCH transmission; the third or fourth symbol position in the time slot; the Fth symbol position in the time slot used for the PDSCH transmission, where F is an integer greater than 1.

[0035] According to an embodiment of this disclosure, the frequency domain pattern of the reference signal includes: for a reference signal, J code division multiplexing (CDM) groups and an orthogonal overlay code (OCC) with a frequency domain length of K are used, wherein J and K are positive integers, and the product of J and K is greater than or equal to a first threshold.

[0036] According to embodiments of this disclosure, for the same antenna port, the starting offset of the resource element (RE) position of the reference signal with an even reference signal index is different from the starting offset of the RE position of the reference signal with an odd reference signal index.

[0037] According to an embodiment of this disclosure, the method further includes: receiving from the UE a measurement result of a measurement performed on a channel used for transmitting the PDSCH transmission, wherein the first information is determined based on the measurement result.

[0038] According to an embodiment of this disclosure, the method further includes: sending a Channel State Information (CSI) report configuration related to the measurement result to the UE, the CSI report configuration including indication information related to the quantization of the measurement result, wherein the indication information includes information related to at least one of the following: one or more quantization levels for quantizing the measurement result, one or more threshold ranges corresponding to the one or more quantization levels, the number of the one or more quantization levels, and the quantization method of the measurement result.

[0039] According to embodiments of this disclosure, the measurement results include time-domain measurement results obtained based on channel state information reference signals (CSI-RS) received from the first node for time-domain measurement, wherein the time-domain measurement results are determined based on the correlation between channel estimation results of CSI-RS on a first time unit and channel estimation results of CSI-RS on a second time unit.

[0040] According to embodiments of this disclosure, the first time unit and the second time unit are two different time units among all the time units occupied by the CSI-RS.

[0041] According to embodiments of this disclosure, the measurement results include frequency domain measurement results obtained based on channel state information reference signals (CSI-RS) received from the first node for frequency domain measurement, wherein the frequency domain measurement results are determined based on the correlation between channel estimation results of CSI-RS on a first frequency domain unit and channel estimation results of CSI-RS on a second frequency domain unit.

[0042] According to embodiments of this disclosure, the first frequency domain unit and the second frequency domain unit are two different frequency domain units among all frequency domain units occupied by the CSI-RS.

[0043] According to embodiments of this disclosure, the CSI report configuration further includes a target quantization level, wherein the measurement result includes identification information of resources whose quantization level of the measured value meets the target quantization level.

[0044] Embodiments of this disclosure provide a user equipment (UE) in a wireless communication system, including: a transceiver configured to transmit and receive signals; and a processor coupled to the transceiver and configured to perform a method executed by the UE in the wireless communication system according to embodiments of this disclosure.

[0045] Embodiments of this disclosure provide a node device in a wireless communication system, including: a transceiver configured to transmit and receive signals; and a processor coupled to the transceiver and configured to perform a method performed by a node device (e.g., a first node, etc.) in the wireless communication system according to embodiments of this disclosure.

[0046] Embodiments of this disclosure provide a computer-readable medium having computer-readable instructions stored thereon, which, when executed by a processor, are used to implement a method performed by any node and / or user equipment (UE) in a wireless communication system according to embodiments of this disclosure.

[0047] The method provided in this disclosure, performed by a node and / or user equipment (UE) in a wireless communication system, can effectively increase data throughput by reducing the proportion of signals used for channel estimation and / or demodulation in the data transmission channel. Attached Figure Description

[0048] To gain a more complete understanding of this disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, wherein like reference numerals denote like parts:

[0049] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0050] Figure 2 An example base station according to an embodiment of the present disclosure is shown;

[0051] Figure 3 An example user equipment according to an embodiment of the present disclosure is shown;

[0052] Figure 4 A schematic diagram of the DMRS frequency domain pattern of the three CDM groups is shown when the DMRS is specified as configuration type 1, according to an embodiment of the present disclosure;

[0053] Figure 5 A schematic diagram of the DMRS frequency domain pattern of four CDM groups is shown when the DMRS is specified as configuration type 1, according to an embodiment of the present disclosure;

[0054] Figure 6 A schematic diagram of the DMRS frequency domain pattern of six CDM groups is shown when the DMRS is specified as configuration type 1, according to an embodiment of the present disclosure;

[0055] Figure 7 A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure, when the DMRS is specified as configuration type 1 and the number of CDM groups is 4;

[0056] Figure 8 A schematic diagram is shown showing the merging of two DMRS symbols when the DMRS is specified as configuration type 1 and the number of CDM groups is 4, according to an embodiment of the present disclosure;

[0057] Figure 9 A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1 and the number of CDM groups is 6.

[0058] Figure 10 A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1 and the number of CDM groups is 6.

[0059] Figure 11 A schematic diagram of the DMRS frequency domain pattern of four CDM groups is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 2;

[0060] Figure 12 A schematic diagram of the DMRS frequency domain pattern of five CDM groups is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 2;

[0061] Figure 13 A schematic diagram of the DMRS frequency domain pattern of six CDM groups is shown when the DMRS is specified as configuration type 2, according to an embodiment of the present disclosure;

[0062] Figure 14 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 5 is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1;

[0063] Figure 15 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 6 is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1;

[0064] Figure 16 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 7 is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1;

[0065] Figure 17 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 8 is shown according to an embodiment of the present disclosure when the DMRS is specified as configuration type 1;

[0066] Figure 18 A flowchart illustrating a method performed by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure is shown;

[0067] Figure 19 A flowchart is shown of a method performed by a first node in a wireless communication system according to an embodiment of the present disclosure;

[0068] Figure 20 A schematic diagram of a node according to an embodiment of the present disclosure is shown;

[0069] Figure 21 A schematic diagram of a user equipment according to an embodiment of the present disclosure is shown;

[0070] Figure 22 A schematic diagram illustrating the variables involved in calculating the CSI time-domain channel correlation coefficient is shown; and

[0071] Figure 23 A schematic diagram of the variables involved in the calculation of the CSI frequency domain channel correlation coefficient is shown. Detailed Implementation

[0072] The following description, with reference to the accompanying drawings, is provided to aid in a thorough understanding of the various embodiments of this disclosure as defined by the claims and their equivalents. This description includes various specific details to aid understanding but should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures may be omitted.

[0073] The terms and wording used in the following description and claims are not limited to their dictionary meanings, but are merely used by the inventors to enable a clear and consistent understanding of this disclosure. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this disclosure is for illustrative purposes only and not for limiting the purpose of this disclosure as defined in the appended claims and their equivalents.

[0074] It should be understood that the singular forms of “one,” “an,” and “the” include plural references unless the context clearly indicates otherwise. Thus, for example, the reference to “component surface” includes one or more such surfaces.

[0075] The terms “comprising” or “may include” refer to the presence of a corresponding disclosed function, operation, or component that may be used in the various embodiments of this disclosure, rather than limiting the presence of one or more additional functions, operations, or features. Furthermore, the terms “comprising” or “having” may be interpreted as indicating certain characteristics, numbers, steps, operations, constituent elements, components, or combinations thereof, but should not be construed as excluding the possibility of the presence of one or more other characteristics, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0076] The term "or" as used in the various embodiments of this disclosure includes any of the listed terms and all combinations thereof. For example, "A or B" may include A, may include B, or may include both A and B.

[0077] Unless otherwise defined, all terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of those skilled in the art as described herein. Common terms as defined in dictionaries are to be interpreted as having a meaning consistent with the context in the relevant technical field and should not be interpreted ideally or overly formally unless expressly defined in this disclosure.

[0078] The accompanying drawings and various embodiments used to illustrate the principles of this disclosure in this patent document are for illustrative purposes only and should not be construed as limiting the scope of this disclosure in any way. Those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged system or apparatus.

[0079] Before proceeding with the following detailed description, it may be advantageous to define certain words and phrases used throughout the patent literature. The term “connection” and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are physically in contact with each other. The terms “transmit,” “receive,” and “transmit,” and their derivatives encompass both direct and indirect communication. The terms “comprise” and “include,” and their derivatives mean inclusion without limitation. The term “or” is concurrent, meaning both and / or. The phrase “associated with,” and its derivatives mean including, being included in, interconnected with, containing, being contained within, connected to or connected with, coupled to or coupled with, able to communicate with, cooperate with, intertwine, juxtapose, proximate, bound to or bound with, having, possessing attributes, having a relationship with, or having a relationship with, etc. The term “controller” means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or in a combination of hardware and software and / or firmware. The functionality associated with any particular controller, whether local or remote, can be centralized or distributed. The phrase "at least one" when used to list items means that different combinations of one or more of the listed items can be used, and it is possible that only one item in the list is needed. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C; A and B; A and C; B and C; and only A, only B, and only C. Similarly, the term "set" means one or more. Therefore, a set of items can be a single item or a set of two or more items.

[0080] Furthermore, the various functions described below can be implemented or supported by one or more computer programs, each function being formed by 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, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation in appropriate computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, compact disc (CD), digital video disc (DVD), or any other type of storage. "Non-transitory" computer-readable media excludes wired, wireless, optical, or other communication links that transmit transient electrical or other signals. Non-transitory computer-readable media includes media in which data can be permanently stored and media such as rewritable optical discs or erasable memory devices in which data can be stored and later rewritten.

[0081] Definitions for certain other words and phrases are provided throughout this patent document. Those skilled in the art will understand that, in many, if not the most, instances, such definitions apply to both prior and future uses of the words and phrases defined in this way.

[0082] The figures and various embodiments included herein, used to illustrate the principles of this disclosure, are merely illustrative and should not be construed in any way as limiting the scope of this disclosure. Furthermore, those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged wireless communication system.

[0083] The following Figures 1 to 3 Various embodiments of this disclosure implemented in wireless communication systems are described. Figures 1 to 3 The description does not imply any physical or architectural limitations on the ways in which different embodiments can be implemented. Different embodiments of this disclosure can be implemented in any suitably arranged communication system.

[0084] Figure 1 An example wireless network according to an embodiment of this disclosure is shown. Figure 1 The embodiments of the wireless network shown are for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0085] like Figure 1As shown, the wireless network includes a base station (next generation nodeB, gNB or gNodeB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 such as the Internet, Internet Protocol (IP) networks, or other data networks.

[0086] gNB 102 provides wireless broadband access to network 130 to multiple first user equipments (UEs) within coverage area 120 of gNB 102. The multiple first UEs include UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R1); UE 115, which may be located in a second residence (R2); and UE 116, which may be a mobile device (M) such as a cellular phone, wireless laptop, or wireless personal digital assistant (PDA). gNB 103 provides wireless broadband access to network 130 to multiple second UEs within coverage area 125 of gNB 103. The multiple second UEs include UE 115 and UE 116, and subscriber stations (SS, such as UEs) 117, 118, and 119. In some embodiments, one or more of gNBs 101 and 103 may communicate with each other and UE 111116 using existing wireless communication technologies, and one or more of UEs 111 and 119 may communicate directly with each other (e.g., UE 117 and 119) using other existing or proposed wireless communication technologies.

[0087] Depending on the network type, the term "base station" or "BS" can refer to any component (or set of components) configured to provide wireless access to a network, such as a transmit point (TP), transmit-receive point (TRP), enhanced (or "evolved") base station (eNodeB or eNB), 5G base station (gNB), macro cell, femtocell, wireless fidelity (WiFi) access point (AP), or other wireless-capable devices. A base station can provide wireless access according to one or more wireless communication protocols, such as 3GPP 5G new radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE A), high-speed packet access (HSPA), WiFi 802.11a / b / g / n / ac, etc. For convenience, various names for base station type devices and functions may be used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Furthermore, depending on the network type, the term "User Equipment" (UE) can refer to any component such as a mobile station (MS), user station (SS), remote terminal, wireless terminal, receiving point, or user device. For convenience, various names for user equipment type devices and functions may be used interchangeably in this patent document to refer to remote wireless devices that wirelessly access the BS regardless of 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).

[0088] The dashed lines indicate the approximate extent of coverage areas 120 and 125, which are shown as roughly circular for illustrative and explanatory purposes only. It should be clearly understood that coverage areas such as 120 and 125 associated with the gNB can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the wireless environment associated with natural and man-made obstacles.

[0089] As described in more detail below, one or more of UEs 111 and 119 include circuitry, programming, or a combination thereof. In some embodiments, one or more of gNBs 101 and 103 include circuitry, programming, or a combination thereof.

[0090] although Figure 1 An example of a wireless network is shown, but more can be found on... Figure 1Various modifications can be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Furthermore, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102 or 103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. Additionally, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0091] Figure 2 An example base station according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of gNB 102 shown is for illustrative purposes only, and Figure 1 gNBs 101 and 103 can have the same or similar configurations. However, gNBs come in a variety of configurations, and Figure 2 This disclosure is not intended to limit the scope to any particular implementation of gNB.

[0092] like Figure 2 As shown, gNB 102 includes multiple antennas 200a 200n, multiple radio frequency (RF) transceivers 201a 201n, transmit (TX) processing circuitry 203, and receive (RX) processing circuitry 204. gNB 102 also includes a controller / processor 205, a memory 206, and a backhaul or network interface (IF) 207.

[0093] RF transceivers 201a and 201n receive incoming RF signals, such as signals transmitted by the UE in network 100, from antennas 200a and 200n. RF transceivers 201a and 201n down-convert the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signal is sent to RX processing circuitry 204, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 204 sends the processed baseband signal to controller / processor 205 for further processing.

[0094] TX processing circuit 203 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from controller / processor 205. TX processing circuit 203 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 201a and 201n receive the processed baseband or IF signal from TX processing circuit 203 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 201a and 201n.

[0095] The controller / processor 205 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 205 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 201a 201n, the RX processing circuit 204, and the TX processing circuit 203, according to known principles. The controller / processor 205 may also support additional functions, such as more advanced wireless communication capabilities.

[0096] For example, the controller / processor 205 can support beamforming or directional routing operations, where outgoing signals from multiple antennas 200a 200n are weighted differently to effectively redirect the outgoing signals in the desired direction. Any of a variety of other functions can be supported in the gNB 102 via the controller / processor 205.

[0097] The controller / processor 205 is also capable of executing programs and other processes located in the memory 206, such as the operating system (OS). The controller / processor 205 can move data into or out of the memory 206 as needed by the executing process.

[0098] The controller / processor 205 is also connected to a backhaul or network interface 207. The backhaul or network interface 207 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or over a network. Interface 207 can support communication via any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G, LTE, or LTE A), interface 207 can 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, interface 207 can allow the gNB 102 to communicate via a wired or wireless local area network or via a wired or wireless connection to a larger network (such as the Internet). Interface 207 includes any suitable structure that supports communication via wired or wireless connections such as Ethernet or RF transceivers.

[0099] Memory 206 is connected to controller / processor 205. A portion of memory 206 may include random access memory (RAM), and another portion of memory 206 may include flash memory or other read-only memory (ROM).

[0100] although Figure 2 An example of gNB 102 is shown, but it is possible to see more. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2 Each component is shown in the diagram. As a specific example, an access point may include multiple interfaces 207, and the controller / processor 205 may support routing functionality to route data between different network addresses. As another specific example, although shown as a single instance of TX processing circuitry 203 and a single instance of RX processing circuitry 204, gNB102 may include multiple instances of each (such as one per RF transceiver). For example, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0101] Figure 3 An example user equipment according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111, 115, 117, and 119 can have the same or similar configurations. However, UEs appear in multiple configurations, and Figure 3 This disclosure is not intended to limit the scope to any particular implementation of the UE.

[0102] like Figure 3 As shown, UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a TX processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller or processor 307, an input / output (I / O) interface (IF) 308, an input device 309, a touchscreen display 310, and memory 311. Memory 311 includes an OS 312 and one or more applications 313.

[0103] RF transceiver 302 receives incoming RF signals transmitted by gNB of network 100 from antenna 301. RF transceiver 302 down-converts the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 305, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 305 sends the processed baseband signals to speaker 306 (e.g., for voice data) or processor 307 for further processing (e.g., for web browsing data).

[0104] TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as web data, email, or interactive video game data) from processor 307. TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 302 receives the processed baseband or IF signal from TX processing circuit 303 and up-converts the baseband or IF signal into an RF signal transmitted via antenna 301.

[0105] Processor 307 may include one or more processors or other processing devices and executes OS 312 stored in memory 311 to control the overall operation of UE 116. For example, processor 307 may control the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 302, RX processing circuitry 305, and TX processing circuitry 303 according to known principles. In some embodiments, processor 307 includes at least one microprocessor or microcontroller.

[0106] Processor 307 is also capable of executing other processes and programs located in memory 311, such as processes for CSI (Channel State Information) reporting on the uplink channel. Processor 307 can move data into or out of memory 311 as needed for executing processes. In some embodiments, processor 307 is configured to execute application 313 based on OS 312 or in response to signals received from gNB or operator. Processor 307 is also coupled to I / O interface 308, which provides UE 116 with the ability to connect to other devices such as laptops and laptops. I / O interface 308 is the communication path between these accessories and processor 307.

[0107] The processor 307 is also connected to the touchscreen display 310. The user of the UE 116 can use the touchscreen display 310 to input data into the UE 116. The touchscreen display 310 can be a liquid crystal display, a light-emitting diode display, or other display capable of rendering text and / or at least limited graphics such as those from a website.

[0108] Memory 311 is connected to processor 307. A portion of memory 311 may include RAM, and another portion of memory 311 may include flash memory or other ROM.

[0109] although Figure 3 An example of UE 116 is shown, but it is possible to modify it. Figure 3 Make various changes. For example, Figure 3 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 307 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although... Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0110] Exemplary embodiments of this disclosure are further described below with reference to the accompanying drawings.

[0111] The text and accompanying drawings are provided by way of example only to aid in understanding this disclosure. They should not be construed as limiting the scope of this disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on the content disclosed herein, that changes may be made to the illustrated embodiments and examples without departing from the scope of this disclosure.

[0112] Fixed wireless access (FWA) technology is an alternative to fiber-to-the-home (FTTH) to solve the last-mile connectivity problem. It can provide high-speed broadband connections in areas where fiber optics cannot reach, and is particularly suitable for low- to medium-density markets. In recent years, FWA has gradually become a mainstream connectivity solution and has received increasing attention. As a technology that combines fixed-line and wireless communication to provide broadband access services, FWA's principle and framework are very simple: a base station provides signal coverage, and then in the user's residence or commercial premises, devices such as customer premises equipment (CPE) receive the signal and convert the received signal into Wi-Fi (Wireless Fidelity) or wired signals to provide network access services to more terminals.

[0113] Compared to fiber-to-the-home (FTTH), FWA offers advantages such as lower deployment complexity, lower cost per user, and shorter deployment time. However, current research on fiber optic technology can achieve a transmission speed of 4.1 petaflops per second (1 petaflop = 1000 teraflops = 1,000,000 gigabits per second), while commercially available FWA equipment (such as Qualcomm's 5GFWA ultra Gen3) can only provide a maximum transmission speed of 10 gigabits per second. Improving the transmission capacity of FWA is a hot research topic.

[0114] On the one hand, the demodulation reference signal (DMRS), as a physical layer reference signal used for channel estimation, is forcibly configured with one or two Orthogonal Frequency Division Multiplexing (OFDM) symbols during each physical downlink shared channel (PDSCH) data transmission. With additional DMRS symbols, up to four DMRS symbols can be allocated to support data transmission in rapidly changing channels. Thus, DMRS can occupy up to 29% of resources in a single transmission slot. For communication systems with relatively stable channels that do not require frequent channel estimation (such as FWA communication systems), this results in a waste of resources.

[0115] On the other hand, since FWA deployment is relatively fixed, the beam direction between the base station and CPE usually remains unchanged within a certain period of time. Therefore, there is a stable channel environment between the base station and CPE. Meanwhile, to overcome the severe path loss caused by high-frequency communication, FWAs operating in the millimeter-wave band are often deployed outdoors within the line-of-sight (LOS) communication range of the base station. Therefore, the communication channel quality is generally good enough, with a high signal-to-noise ratio. Based on these two characteristics, we can conclude that less channel estimation can be used in FWA communication compared to traditional mobile communication systems. Therefore, for some specific communication systems, we can reduce the transmission of DMRS signals and use the symbols used for DMRS signal transmission to transmit data, thereby increasing data throughput.

[0116] This disclosure provides a new method for designing time-domain and / or frequency-domain patterns for DMRS signals. Using the time-domain and frequency-domain pattern design method provided in this disclosure can reduce the transmission of DMRS signals, thereby increasing data throughput.

[0117] In this disclosure, users can refer to user equipment (UE), terminal, user-side equipment, customer premises equipment (CPE), etc.

[0118] In this disclosure, time-domain location and time-domain pattern are used interchangeably. For example, the time-domain location of one or more first signals can also be referred to as the time-domain pattern of one or more first signals.

[0119] The method of this disclosure can be applied to any existing or future signal and / or channel, including a demodulation reference signal (DMRS). For example, any reference signal, any signal used for channel estimation or demodulation, may be referred to herein as a first signal. Furthermore, the method of this disclosure can also be applied to any other reference signal, such as a reference signal used for channel estimation and / or demodulation of any channel, including the Physical Broadcast Channel (PBCH), Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), sidelink, etc. In the following embodiments, a DMRS used for PDSCH will be described as an example.

[0120] The user-side behaviors provided in this disclosure embodiment may include at least one of the following:

[0121] The user receives configuration information for the time-domain and / or frequency-domain patterns of the DMRS used for PDSCH from the first node (e.g., the base station);

[0122] The user receives PDSCH from the first node; and / or

[0123] Based on this configuration information, the user receives the DMRS signal for PDSCH from the first node.

[0124] In this disclosure, the configuration information of the time-domain and / or frequency-domain patterns of the DMRS may also be referred to as first information related to the time-domain and / or frequency-domain patterns of the first signal. In some embodiments, the configuration information may include at least one of the following: third information related to the number of one or more DMRS symbols (or one or more first signals associated with one scheduled PDSCH transmission) for channel estimation of a PDSCH transmission for a single scheduling; fourth information related to the time-domain interval of one or more DMRS symbols (e.g., may include symbol interval, time slot interval, etc.); the time-domain position of one or more DMRS symbols; fifth information related to the mode (e.g., the first mode, second mode, etc. described below) used to determine the time-domain interval and / or time-domain position of one or more DMRS symbols; and sixth information related to the frequency-domain patterns of one or more DMRS, etc. Furthermore, the configuration information may also include methods and / or modes and / or information for determining any one or more of the above-described information of one or more DMRS. In other words, the configuration information can directly include the specific information of each of the above-mentioned items (e.g., the specific number of DMRS symbols, time-domain intervals, time-domain locations, etc.), or it can include methods and / or modes and / or information used to determine this information. In this case, the user can determine one or more of the above-mentioned items based on these methods and / or modes and / or information. Furthermore, one or more of the above-mentioned methods and / or modes and / or information can be transmitted through the same message or information, or they can be transmitted through different messages or information; this is not limited herein. Additionally, one or more of the above-mentioned methods and / or modes and / or information can also be pre-configured or pre-defined by the protocol. In this case, the user and the base station can respectively perform signal and / or channel transmission based on the pre-configured or pre-defined methods and / or modes and / or information. The following will describe this in detail with reference to embodiments.

[0125] In the time-domain pattern provided by the embodiments of the present disclosure, when performing PDSCH transmission, there is at most one DMRS symbol in each time slot, which is particularly applicable to the case where multiple time slots are scheduled for PDSCH transmission at a time (i.e., the case where one PDSCH transmission is scheduled to be transmitted on multiple time slots). Suppose that in a PDSCH transmission scheduling, N time slots are configured for PDSCH transmission, and the number of configured DMRS symbols is M, then M <= N, and M and N are positive integers. Compared with the current design in the 3GPP protocol where there is at least one DMRS symbol for each PDSCH transmission time slot (M >= N), using the method provided by the embodiments of the present disclosure can reduce the transmission of DMRS symbols, thereby increasing the data throughput. For the case where N time slots are scheduled for PDSCH transmission at a time, the content transmitted on the N time slots (i.e., the content of this PDSCH transmission) is not limited. It can be a repeated version of the PDSCH on a single time slot transmitted in the N time slots; it can also be multiple PDSCHs (multiple PDSCH, multi-PDSCH) transmitted in multiple time slots, where each PDSCH contains an independent transport block (Transport block, TB), and each TB is restricted to one time slot; it can also be the TB of a PDSCH transmitted in multiple time slots, etc.

[0126] The number of DMRS symbols in the embodiments of the present disclosure can be determined by specific application scenarios. Optionally, when multiple time slots are scheduled for PDSCH transmission at a time, the number of DMRS symbols used can be 1. This setting method of the number of DMRS symbols is applicable to the case where the channel is very stable. At this time, only one DMRS symbol is configured in multiple time slots, and one DMRS symbol can be used for channel estimation including all time slots.

[0127] Optionally, when multiple time slots are scheduled for PDSCH transmission at a time, the number of DMRS symbols M used can also satisfy 1 < M < N. This setting method of the number of DMRS symbols is applicable to the case where the channel changes relatively, and using one DMRS symbol cannot meet the channel estimation performance requirements on all time slots, and more than one DMRS symbol needs to be set.

[0128] Optionally, when multiple time slots are scheduled for PDSCH transmission at a time, the number of DMRS symbols M used can also satisfy M = N. This setting method of the number of DMRS symbols is applicable to the case where the channel changes relatively fast, such as when the corresponding terminal is in motion. At this time, one DMRS symbol needs to be used in each transmission time slot for channel estimation of data transmission in this time slot for demodulation of transmitted data. This setting method of the number of DMRS symbols can be a fallback mechanism.

[0129] In this embodiment of the disclosure, the DMRS symbol positions are configured to satisfy at least one of the following criteria: the DMRS symbol interval can be constant (provided the DMRS symbol does not conflict with other symbols); the DMRS symbol is located at the first available position in the time slot where the DMRS symbol needs to be configured; the DMRS symbol is located at the third or fourth position in the time slot where the DMRS symbol needs to be configured; the DMRS symbol is located at the Ath available position from the end in the time slot where the DMRS symbol needs to be configured, where A is a positive integer less than or equal to the total number of available positions for DMRS in the time slot where the DMRS symbol needs to be configured. More generally, the DMRS symbol can be located at the Cth available symbol position in the time slot where the DMRS symbol needs to be configured, where C is a positive integer. Here, an available position refers to a symbol position in a specific time slot that can be used to place the DMRS, for example, it can be a symbol position in a time slot and / or a symbol that does not conflict with symbols used for other channels, signals, and / or data transmissions scheduled for PDSCH transmission.

[0130] In this embodiment of the disclosure, the DMRS symbol interval refers to the number of symbols between two adjacent DMRS symbols during the scheduling of multiple time slots for PDSCH transmission. For example, if the first DMRS symbol is located at symbol position 1 and the second DMRS symbol is located at symbol position 4, then the symbol interval between these two DMRS symbols can be considered to be 3. The DMRS symbol interval may include the number of non-PDSCH symbols; that is, the DMRS symbol interval refers to the absolute number of time-domain symbols between two adjacent DMRS symbols. The channel estimation performance is best when the absolute number of time-domain symbols between two adjacent DMRS symbol intervals is the same.

[0131] The DMRS symbol interval can also include only the number of PDSCH symbols. That is, in a single scheduling of multiple time slots for PDSCH transmission, after extracting symbols containing both DMRS and PDSCH (i.e., considering only symbols containing DMRS and / or PDSCH, or excluding symbols containing neither DMRS nor PDSCH), the number of PDSCH symbols between two adjacent DMRS is the number of symbols used solely for PDSCH transmission between two adjacent DMRS. When using the design criterion that the number of PDSCH symbols between two adjacent DMRS symbols is constant, the location of DMRS symbols can be designed using all available PDSCH resources in a single scheduling of multiple time slots, based on the Time Domain Resource Allocation (TDRA) configuration of PDSCH in each time slot. This method is simple to implement and does not require addressing the issue of DMRS symbols colliding with other channels or signals. In this document, a single scheduling can refer to the scheduling of a single PDSCH transmission. The scheduling of a single PDSCH transmission can mean scheduling one or more time slots for PDSCH transmission, and there is no limitation on the content sent on the one or more time slots. It can be sending a repeated version of the PDSCH in a single time slot in the one or more time slots; it can also be sending multiple PDSCHs in multiple time slots, where each PDSCH contains an independent TB, and each TB is restricted to one time slot; it can also be sending the TB of a PDSCH in multiple time slots, etc.

[0132] The time slots that require DMRS symbol configuration as described in this article may include time slots that require a DMRS symbol configuration, depending on the calculation or specific application scenario.

[0133] Specifically, the time slot in which a DMRS symbol needs to be placed (or configured) can be determined based on the number of time slots scheduled in one operation (i.e., the number of time slots used for PDSCH transmission) and the number of DMRS symbols. For example, the time slot index where the DMRS symbol is located can be calculated based on the number of time slots scheduled in one operation and the number of DMRS symbols. The time slot corresponding to the calculated time slot index where the DMRS symbol is located is the time slot in which a DMRS symbol needs to be placed, and this time slot may contain one DMRS symbol. In one specific implementation of the method, if the number of time slots scheduled in one operation is N and the number of DMRS symbols is M, then the time slot index is... The time slot contains one DMRS symbol, where m∈{0,1,……,M-1} is the DMRS symbol index. This is a rounding down operation. The method is simple to implement. Based on the number of time slots and the number of DMRS symbols in a single scheduling, the time slot index of the DMRS symbol is calculated. Then, by checking if the current transmission time slot index matches (or is the same as) the time slot index of the DMRS symbol, it can be determined whether the current transmission time slot contains a DMRS symbol; that is, the time slot position of one or more DMRS symbols is determined. It should be understood that the above method of calculating the time slot index is merely an example. Embodiments of this disclosure may also include any other calculation method based on the number of time slots and the number of DMRS symbols, as long as the condition that each time slot contains at most one DMRS symbol is met. In this document, the time slot in which a DMRS symbol needs to be placed can also be referred to as the time slot occupied by the DMRS symbol or the time slot containing the DMRS symbol.

[0134] Optionally, the time slot in which a DMRS symbol needs to be placed (or configured) can be determined based on the number of time slots scheduled in one operation (i.e., the number of time slots used for PDSCH transmission) and the time slot interval of the DMRS symbol. The time slot interval of the DMRS symbol can be included in the configuration information or fourth information as described above. In one implementation, assuming that the number of time slots scheduled in one operation is N and the time slot interval of the DMRS symbol is E time slots, then the time slot with time slot index {0, E, 2E, 3E, ...} among the N time slots can be determined as the time slot containing one DMRS symbol.

[0135] Optionally, the time slot requiring a DMRS symbol can be determined as follows: When scheduling multiple time slots for PDSCH transmission, if a specific transmission interrupts the PDSCH transmission, a DMRS symbol needs to be placed in the first time slot after restarting PDSCH transmission. This configuration is applicable to situations where, for example, the operating state of the transmission equipment and / or devices changes, making it impossible to reuse previous channel estimation results when restarting PDSCH transmission. The transmission equipment and / or devices can be radio frequency devices, such as phase shifters, and / or antenna configurations. Specifically, the specific transmission here could be the base station transmitting signals to other terminals and / or using different beam directions, such as uplink / downlink switching of a single terminal. This method is suitable for scenarios where the operating state of the transmission equipment and / or devices changes during the scheduling of multiple time slots for PDSCH transmission, making previous channel estimation results unusable and requiring re-evaluation of the channel.

[0136] Optionally, the time slot in which a DMRS symbol needs to be placed can also be the remaining time slot after removing the time slot from which the DMRS symbol can be removed from the transmission time slot set (e.g., one or more time slots scheduled for PDSCH transmission). In this case, each of the remaining time slots must contain a DMRS symbol. The time slot from which the DMRS symbol can be removed can be a time slot where no change in the operating state of the transmission equipment and / or device makes it impossible to reuse the previous channel estimation results, or in other words, a time slot where the channel estimation results of the previous time slot can be reused, which may also be referred to herein as the first time slot. For example, when the same UE performs PDSCH transmission in consecutive time slots, under the condition of channel stability, the other time slots after the first time slot can remove the DMRS symbol and reuse the channel estimation results made using the DMRS symbol in the first time slot for demodulation, or use the channel estimation results of the DMRS symbol in the remaining time slots to calculate the channel estimation results on the data symbols transmitted on the time slots that do not contain the DMRS symbol by interpolation or extrapolation.

[0137] As mentioned above, "the DMRS symbol is located at the first placeable position in the time slot where the DMRS symbol needs to be configured" means that the DMRS symbol is located at the beginning position of the PDSCH transmission symbol in the scheduled time slot. For example, it could be... The beginning position of the PDSCH transmission symbol can be determined based on the start symbol and length indicator value (SLIV) in the PDSCH configuration information. This design method, where the DMRS symbol is located at the beginning symbol position, belongs to the pre-design method. The position of the DMRS symbol as close as possible to the start point of the scheduling helps the receiver quickly estimate the channel and perform reception detection, reducing demodulation and decoding delays. It is worth noting that the first placeable position here refers to the start point of the scheduling (i.e., the start point of the scheduled PDSCH transmission), and this position may not be the start position of the current time slot. In particular, this method is applicable when a specific transmission causes the PDSCH transmission to be interrupted, and a DMRS symbol needs to be placed when the PDSCH transmission is restarted. In this case, a DMRS symbol needs to be placed in the first time slot of the restarted PDSCH transmission for the demodulation needs of the subsequent PDSCH transmission.

[0138] The design approach described above, where the DMRS symbol is located in the third or fourth position within the time slot where the DMRS symbol needs to be configured, implicitly assumes that the third or fourth position belongs to the scheduled PDSCH range. In this case, PDSCH data can also be transmitted before the DMRS symbol in a time slot (e.g., the first and / or second positions within that time slot). Using this approach ensures compatibility with existing 3GPP protocol design methods.

[0139] Specifically, when scheduling multiple time slots for PDSCH transmission, if the number of configured DMRS symbols is one (M=1), then the DMRS symbol can be located in the first time slot of each PDSCH transmission. In other embodiments, the DMRS symbol can also be located in the last time slot of each PDSCH transmission or in other time slots scheduled for that PDSCH transmission. The position of the DMRS symbol in the first time slot (or the last time slot or other scheduled time slot) can be the first available position in the time slot, or the third or fourth position in the time slot. In this design method, only one DMRS symbol needs to be transmitted per PDSCH transmission, saving the most resources for data transmission.

[0140] Specifically, when scheduling multiple time slots for PDSCH transmission, if the number of time slots scheduled at one time is N and the number of DMRS symbols is M, the method for calculating the position of DMRS symbols can be the equal DMRS symbol interval method. The equal DMRS symbol interval method means that the interval between adjacent DMRS symbols is equal and constant. It can include at least one of the following: determining the position of DMRS symbols in a specific time slot; determining the DMRS symbol interval; determining the position of each DMRS symbol.

[0141] The specific time slot can be at least one of the following: the first time slot, i.e., the time slot with a time slot index of 0; the first time slot between two adjacent schedulings; and the last time slot, i.e., the time slot with a time slot index of N-1.

[0142] The "position of the DMRS symbol in a specific time slot" can be the first available position in that specific time slot; it can also be the third or fourth position in that specific time slot; or it can be the A-th position from the end of that specific time slot, where A can range from 1 to A to 5. The design method of choosing the first available position in the specific time slot is a pre-design method, which can reduce demodulation and decoding delays. Choosing the third or fourth position in the specific time slot is compatible with existing 3GPP protocol design methods and does not require significant modifications. Choosing the A-th position from the end of the specific time slot is to ensure the accuracy of channel estimation in the final time slot of the transmission.

[0143] The method for determining the DMRS symbol spacing may include at least one of the following: determining the range that the channel estimation needs to cover (or, the number of symbols that the channel estimation needs to cover, or the first number of symbols); determining the DMRS symbol spacing based on the range that the channel estimation needs to cover and the number of DMRS symbols.

[0144] Optionally, determining the coverage area required for channel estimation can be done by determining the coverage area after the first DMRS symbol based on the position of the DMRS symbol in the first time slot (i.e., the position of the first DMRS symbol in the first time slot, which can be called the first symbol position). This includes the first DMRS symbol in the first time slot and the number of symbols after it, as well as the number of symbols in the remaining time slots in this scheduling. For example, assuming the first DMRS symbol is the Pth symbol in the first time slot, the number of time slots used in this transmission is N, and the number of symbols in one time slot is B, then the coverage area required for channel estimation can be expressed as (B-P+1)+(N-1)*B time-domain symbols, where "1" represents the first DMRS symbol in the first time slot, BP represents the number of time-domain symbols after the first DMRS symbol in the first time slot, and (N-1)*B represents the number of time-domain symbols in the other N-1 time slots besides the first time slot. The method for determining the coverage area required for channel estimation requires knowledge of three parameters, P, N, and B. The number of time slots N and the number of symbols in one time slot B are already known during the PDSCH scheduling. At this point, knowing only one additional parameter P is sufficient to obtain the coverage area required for this channel estimation, making the implementation simple.

[0145] Optionally, the range to be covered by the channel estimation can also be determined based on the position of the DMRS symbol in the first time slot (e.g., the first symbol position), the position of the last PDSCH transmission used in this scheduling in the last time slot (e.g., the second symbol position), and the number of time slots called in this transmission. For example, assuming the first DMRS symbol is at the P-th symbol in the first time slot, the number of time slots called in this transmission is N, the number of symbols in one time slot is B, and the last PDSCH transmission used in this scheduling in the last time slot is at the U-th symbol in this time slot, then the range to be covered by the channel estimation can be expressed as (B-P+1)+(N-2)*B+U time-domain symbols. This method is applicable when the number of symbols used for PDSCH transmission in the last time slot does not fill the entire time slot.

[0146] Optionally, determining the coverage area for channel estimation can also be done by determining the coverage area for channel estimation in this scheduled PDSCH transmission process based on the positions of the DMRS symbols in the first and last time slots. For example, assuming the position of the DMRS (i.e., the first DMRS) in the first time slot is the Pth symbol, and the position of the DMRS (i.e., the last DMRS) in the last time slot is the Qth symbol, and the number of time slots used in this PDSCH transmission scheduling is N, with B symbols in one time slot, then the coverage area for channel estimation can be expressed as (B-P+1)+(N-2)*B+Q time-domain symbols. This coverage area requires first determining the positions of the DMRS in the first and last time slots of this scheduled PDSCH transmission process, and is applicable to cases where there are special requirements for the position of the DMRS symbols in the last time slot. These special requirements may include requirements for the accuracy of channel estimation on the symbols used for PDSCH transmission in the last time slot. At this point, the channel estimation on the symbol used for PDSCH transmission after the DMRS symbol in the last time slot can be obtained by using the channel estimation result based on the DMRS symbol in the last time slot, or by extrapolating the channel estimation result based on the DMRS symbol in the last time slot and the previous (i.e., the penultimate) DMRS symbol.

[0147] Optionally, determining the range that the channel estimation needs to cover can also be done by determining the range of the channel estimation during two adjacent PDSCH transmissions based on the position of the DMRS symbol in the first time slot of each scheduled transmission in two adjacent PDSCH transmissions (e.g., the last time slot of the first scheduled PDSCH transmission and the first time slot of the second scheduled PDSCH transmission are adjacent). For example, suppose the DMRS position in the first time slot of the first scheduled transmission is the P1th symbol, and the DMRS position in the first time slot of the second scheduled transmission is the P2th symbol. The number of time slots used in this scheduled transmission (i.e., the first scheduled transmission) is N, and the number of symbols in one time slot is B. Then, the range to be covered by channel estimation can be expressed as (B-P1+P2)+(N-1)*B time-domain symbols, where (B-P1+1)+(N-1)*B is the range from the first DMRS symbol in the first time slot of the first scheduling to the last symbol in the last time slot of the first scheduling, and (P2-1) is the range from the last symbol (excluding) of the last time slot of the first scheduling to the symbol preceding the first DMRS symbol in the first time slot of the second scheduling. The sum of these two is the range to be covered by channel estimation as described above. Specifically, for consecutive scheduling, and when the DMRS position is set the same in the first time slot of consecutive scheduling, P1 = P2. In this case, the range to be covered by channel estimation is N*B. The method for determining the coverage area required for channel estimation requires information from the current scheduled transmission and the next scheduled transmission. Optimal channel estimation performance can be obtained for continuous scheduled transmissions.

[0148] Optionally, determining the coverage area required by the channel estimation can also involve obtaining the symbol resources used for PDSCH transmission based on the TDRA configuration of PDSCH in each of the multiple time slots in this scheduling. For example, the symbol lengths used for PDSCH transmission in each time slot can be summed to obtain the total number of symbols used for PDSCH transmission in this scheduling, which is the coverage area required by the channel estimation. In this case, the coverage area required by the channel estimation only includes the symbol range used for PDSCH transmission and does not include other channels or signals, thus avoiding conflicts when allocating DMRS symbol positions.

[0149] Alternatively, the method for determining the DMRS symbol interval based on the coverage area required for channel estimation and the number of DMRS symbols can be to determine the DMRS symbol interval as... Where R is the coverage area that needs to be estimated for the channel, and M is the number of DMRS symbols. This is a rounding down operation. The method for calculating the DMRS symbol interval is applicable when the position of one DMRS symbol is already determined, and only the remaining M-1 DMRS symbols need to be determined. For example, it is applicable when the DMRS symbols in the first time slot are already determined. In this case, the area R to be covered by channel estimation needs to be divided into M-1 parts to determine the positions of the remaining M-1 DMRS symbols. Since the method for determining the DMRS symbol interval divides the area to be covered by channel estimation into M-1 parts, there will be a DMRS symbol near the beginning and end of this PDSCH transmission to ensure the performance of channel estimation.

[0150] Alternatively, the method for determining the DMRS symbol spacing based on the coverage area required by channel estimation and the number of DMRS symbols can be as follows: Where R is the coverage area that needs to be estimated for the channel, and M is the number of DMRS symbols. This is a rounding down operation. The method for calculating the DMRS symbol interval is to divide the area to be covered by channel estimation into M parts, which is suitable for situations where no DMRS symbols are needed for channel estimation near the end time of the current PDSCH transmission.

[0151] In this embodiment of the disclosure, the method for determining the DMRS symbol position based on the DMRS symbol interval is to place one DMRS symbol every DMRS symbol interval after determining the DMRS symbol position in the first time slot. Using this fixed symbol interval DMRS symbol placement method not only simplifies hardware implementation complexity but also helps improve the accuracy of channel estimation. Furthermore, the DMRS symbol interval can also be specified by the protocol or configured by the base station, for example, by being included in the fourth information as described above.

[0152] Specifically, when scheduling multiple time slots for PDSCH transmission, if the number of time slots scheduled at one time is N and the number of DMRS symbols is M, the method for calculating the position of the DMRS symbols can also be the equal DMRS time slot interval method. The equal DMRS time slot interval method means that the time slot intervals between time slots containing DMRS symbols are equal and constant, and it includes at least one of the following: determining the time slot index where the DMRS symbol is located; determining the position of the DMRS symbol in the corresponding time slot.

[0153] Specifically, when scheduling multiple time slots for PDSCH transmission at once, if the number of time slots scheduled at once is N and the number of DMRS symbols is M, the method for calculating the time slot where the DMRS symbol is located can be: the time slot index is... Each time slot contains one DMRS symbol, where m ∈ {0, 1, ..., M-1}, and m is the DMRS symbol index. The method for calculating the time slot index of the DMRS symbol ensures that there is a DMRS symbol at equal intervals between time slots, thus guaranteeing the channel estimation results.

[0154] Optionally, the position of the DMRS symbol in the first time slot, i.e., the time slot with time slot index 0, can be the first placeable position in the time slot, or the third or fourth position in the time slot, or the Ath placeable position from the end in the time slot, or the Cth placeable position in the time slot, where C is a positive integer.

[0155] Optionally, the position of the DMRS symbol in a time slot with a non-zero time slot index (i.e., not the first time slot) can be consistent with the position of the DMRS symbol in the first time slot. That is, if the position of the DMRS symbol in a time slot with a time slot index of 0 is the first placeable position in that time slot, then the position of the DMRS symbol in a time slot with a non-zero time slot index is also the first placeable position in that time slot; or, if the position of the DMRS symbol in a time slot with a time slot index of 0 is the third or fourth position in that time slot, then the position of the DMRS symbol in a time slot with a non-zero time slot index is also the third or fourth position in that time slot; or, if the position of the DMRS symbol in a time slot with a time slot index of 0 is the Ath placeable position from the end of that time slot, then the position of the DMRS symbol in a time slot with a non-zero time slot index is also the Ath placeable position from the end of that time slot. Using the same design principles helps the receiver quickly locate the position of the DMRS symbol, and also helps reduce signaling overhead. That is, only one design method needs to be used for all time slots containing DMRS symbols.

[0156] Optionally, the position of the DMRS symbol in a time slot with a non-zero time slot index number may differ from the position of the DMRS symbol in the first time slot. In this case, the position of the DMRS symbol in each time slot can be set individually. This design method offers greater flexibility, allowing the DMRS symbol to be positioned differently in different time slots.

[0157] In this embodiment of the disclosure, the method of scheduling multiple time slots for PDSCH transmission at one time is not limited. The scheduling method can be dynamically scheduled by PDCCH or DCI, or semi-persistent scheduling (SPS) can be performed by radio resource control (RRC) configuration.

[0158] In this embodiment of the disclosure, when the position of a DMRS symbol conflicts with other channels or signals, the DMRS symbol can be placed in a nearby (or adjacent) available symbol position. For example, the DMRS symbol can be placed in a symbol position adjacent to the conflicting position used for this PDSCH transmission. This method only changes the position of the conflicting DMRS symbol; the positions of the remaining DMRS symbols remain unaffected and are still set according to the predetermined method. This method is applicable to situations where DMRS symbols are placed using an equal DMRS symbol interval method, or where DMRS symbols are placed using an equal DMRS time slot interval method.

[0159] In this embodiment of the disclosure, when the position of a DMRS symbol conflicts with other channels or signals, the placement of the DMRS symbol can be achieved by reselecting the DMRS symbol interval. For example, when a DMRS symbol interval 1 (e.g., a first symbol interval or a first time-domain interval) is calculated according to the DMRS symbol interval determination method described above, and the DMRS symbol is placed according to this symbol interval, if other channels or signals are encountered, preventing the DMRS symbol from being placed at the predetermined position, the conflicting DMRS symbol can first be placed at a position adjacent to the conflicting position where a DMRS symbol can be placed. Then, the DMRS symbol interval 2 (e.g., which can be called a second symbol interval or a second time-domain interval) is recalculated based on the position of the previous DMRS symbol of the conflicting DMRS symbol and the position of the current DMRS symbol (i.e., the newly determined symbol position adjacent to the conflicting position for this PDSCH transmission), and the DMRS symbol interval 2 is used to calculate the position of the remaining DMRS symbols (i.e., the DMRS symbols after the conflicting DMRS symbol). The method for determining the DMRS symbol interval aims to ensure that the number of symbols among several adjacent DMRS symbols is equal, thereby guaranteeing the performance of channel estimation. Furthermore, when the position of a DMRS symbol conflicts with other channels or signals, a new symbol interval (e.g., a third symbol interval or a third time-domain interval) can be determined first. Then, based on the position of the previous DMRS symbol of the conflicting DMRS symbol and the new symbol interval, the symbol positions of the conflicting DMRS symbol and subsequent DMRS symbols are determined. In some embodiments, the third symbol interval can be configured by the base station, for example, included in the configuration information or fourth information as described above. In some embodiments, the third symbol interval can be determined based on the first symbol interval used before the conflict occurred, for example, by increasing or decreasing the first symbol interval by a specific value (e.g., +1 or -1).

[0160] Optionally, for cases where the number of DMRS symbol intervals is greater than 1, a threshold for the number of DMRS symbol intervals can be set. For example, let the number of DMRS symbol intervals be S, and the threshold be T. When the number of DMRS symbol intervals S is less than the threshold T, if it is necessary to increase the number of DMRS symbol intervals during the DMRS symbol location determination process, the number of DMRS symbol intervals can be increased; otherwise, other conflict handling schemes are adopted. This setting method is suitable for situations where, when using the equal DMRS symbol interval method to place DMRS symbols, the method of recalculating the DMRS symbol intervals is used to handle situations where the location of the DMRS symbol conflicts with other channels or signals, and the calculated number of DMRS symbol intervals is too large, thus avoiding an excessive number of DMRS symbol intervals and the resulting implementation complexity.

[0161] Alternatively, another method to avoid collisions between DMRS symbols and other signals or channels is to determine a set of selectable location ranges for DMRS symbols in this transmission based on the SLIV in each time slot, and then select at least one DMRS symbol interval from this set of location ranges according to the number of DMRS symbols. This employs a global design approach to avoid collisions. Specifically, a threshold for the number of DMRS symbol intervals can also be set for this global design method to avoid an excessive number of DMRS symbols, which would complicate implementation.

[0162] Specifically, the method for selecting the DMRS symbol interval based on the SLIVs in each time slot of the current scheduled transmission can be to consider only the number of PDSCH symbols. That is, when calculating the DMRS symbol interval, the estimated channel coverage area for this scheduling can be obtained by simply summing the SLIVs in each time slot of the local scheduling, and the DMRS symbol interval can be determined using the range and the number of DMRS symbols. This method does not need to consider the symbols occupied by other channels or signals in the current scheduled time slot, making it simple to implement.

[0163] Specifically, the method of selecting the DMRS symbol interval based on the SLIV in each time slot of the current scheduled transmission can also consider the symbols occupied by other channels or signals in the current scheduled time slot. In this case, the channel estimation coverage needs to consider all symbols in multiple time slots of the current scheduling during calculation, even if these symbols are not used for PDSCH transmission, their locations still need to be considered. Then, based on the location of the symbols used for PDSCH transmission, the DMRS symbol interval and / or the location of the DMRS symbols are selected. This approach utilizes the characteristic of equal DMRS symbol intervals to ensure the accuracy of channel estimation while avoiding conflicts with other signals or channels.

[0164] Optionally, the method for determining the DMRS symbol interval can also involve using the DMRS symbols in the case where DMRS symbols need to be configured as a reference to set the DMRS symbol interval. Specifically, the case where DMRS symbols need to be configured can be: when a specific transmission causes a PDSCH interruption during PDSCH transmission, and PDSCH transmission resumes, a DMRS symbol is required. In this case, the symbol position and / or time slot of the DMRS symbol can be used as a reference to determine the DMRS symbol interval. The method for determining the DMRS symbol interval can be based on the positions of one or more existing DMRS symbols. Specifically, if the symbol position of the DMRS symbol is already determined in the case where DMRS symbols need to be configured, then the interval between the already determined DMRS symbol positions is used as the DMRS symbol interval. If multiple DMRS symbol intervals exist, the smallest or largest DMRS symbol interval can be selected to adapt to situations where the channel changes relatively quickly or gradually. This method is suitable for situations where the symbol positions of some DMRS symbols are already determined. A further specific method is that if the symbol position of a DMRS symbol is not determined when DMRS symbols need to be configured, the time slots where other DMRS symbols are located can be determined based on the number of remaining DMRS symbols and the number of time slots scheduled in this operation, and then the symbol position of the DMRS symbol can be further determined. The symbol position of a DMRS symbol refers to its position within a time slot.

[0165] Optionally, as a fallback scheme, the DMRS symbol can also be placed at a specific location within the time slot where the calculated DMRS symbol resides. Optionally, the time slot where the calculated DMRS symbol resides can be, for example, if the number of scheduled time slots is N and the number of DMRS symbols is M, then the time slot index is... The time slot is the time slot where the DMRS symbol is located, where m∈{0,1,……,M-1} is the DMRS symbol index. The method is simple in design and requires few computational parameters.

[0166] Optionally, when there is more than one selectable DMRS symbol interval, the smallest DMRS symbol interval value can be selected, which is suitable for situations where the channel changes relatively quickly.

[0167] Optionally, when there is more than one selectable DMRS symbol interval, the largest DMRS symbol interval value can be selected, which is suitable for situations where the channel changes relatively slowly.

[0168] Optionally, the time slot where the calculated DMRS symbol is located can also be determined by: using the area to be covered by channel estimation and the DMRS symbol interval to determine the symbol position of each DMRS. In this case, the time slot where each DMRS symbol position is located is the time slot where the calculated DMRS symbol is located. The method of determining the time slot position of the DMRS symbol can more accurately achieve equal intervals between adjacent DMRS symbol positions, thereby providing more accurate channel estimation performance.

[0169] Optionally, the specific position can be at least one of the following: the DMRS symbol is located in the first placeable position in the time slot; the DMRS symbol is located in the third or fourth position in the time slot; the DMRS symbol is located in the Ath placeable position from the end of the time slot.

[0170] This disclosure provides a method for configuring DMRS symbols. When a base station schedules multiple time slots for PDSCH transmission, it configures the positions of the DMRS symbols. The configuration method may include configuring the number of DMRS symbols, for example, M. The base station and the UE can determine the position of the DMRS symbols based on at least one of the following: the position of the DMRS symbol in the first time slot; the number of time slots scheduled; and the number of DMRS symbols configured by the base station. The position of the DMRS symbol in the first time slot can be one of the following: the DMRS symbol is located in the first available position in the time slot where the DMRS symbol needs to be configured; the DMRS symbol is located in the third or fourth position in the time slot where the DMRS symbol needs to be configured; or the DMRS symbol is located in the A-th position from the end in the time slot where the DMRS symbol needs to be configured. These positions have been described previously and will not be repeated here.

[0171] The configuration method may further include configuring the DMRS symbol interval at the base station. In this case, the base station and the UE can determine the location of the DMRS symbol based on at least one of the following: the location of the DMRS symbol in the first time slot; the number of time slots in this scheduling; and the DMRS symbol interval configured by the base station. After the DMRS symbol location in the first time slot, a DMRS symbol is placed every DMRS symbol interval.

[0172] The configuration method may further include using formulas to calculate the location of DMRS symbols, or it may include representing the location of DMRS symbols using tables or graphs. Specifically, for different scheduling configurations, tables or graphs may be used to represent the time slot where the DMRS symbol is located and / or the location of the DMRS symbol. Using tables or graphs is visually intuitive and can save computational resources and time.

[0173] This disclosure also provides a frequency domain pattern for a DMRS symbol. Using this frequency domain pattern, a comparable number of antenna ports can be supported with or without a reduction in the number of DMRS symbols; for example, a single DMRS symbol can achieve a comparable number of antenna ports to two previous DMRS symbols.

[0174] Optionally, the frequency domain pattern of a DMRS symbol can be increased by adding code division multiplexing (CDM) groups to increase the number of antenna ports that a DMRS symbol can support.

[0175] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 4 shown. Specifically, Figure 4 A schematic diagram of the DMRS frequency domain pattern of three CDM groups is shown according to an embodiment of the present disclosure when the DMRS is specified (or configured) as configuration type 1. When the DMRS is specified as configuration type 1, using three CDM groups in combination with an orthogonal cover code (OCC) of length 4 in the frequency domain, 12 antenna ports can be supported using a single DMRS symbol.

[0176] DMRS maps a pseudo-random sequence r(m) to a resource element (RE)(k,L). p,μ The formula can be expressed as follows:

[0177] If the high-level parameter dmrs-TypeEnh is configured, then

[0178]

[0179] otherwise

[0180]

[0181] in,

[0182] This is the DMRS scaling factor;

[0183] w f (k′), w t (l′) and Δ are given in Table 1.

[0184] Table 1. Parameters for PDSCH DMRS Configuration Type 1 (3 CDM Groups)

[0185] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 0 0 [+1 +1 -1 -1] +1 1007 0 0 [+1 -1 -1 +1] +1 1008 1 1 [+1 +1 -1 -1] +1 1009 1 1 [+1 -1 -1 +1] +1 1010 2 2 [+1 +1 -1 -1] +1 1011 2 2 [+1 -1 -1 +1] +1

[0186] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 5shown. Specifically, Figure 5 A schematic diagram of the DMRS frequency domain pattern for four CDM groups is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, four CDM groups are used. The method uses four CDM groups, combined with an OCC of length 4 in the frequency domain, and can support 16 antenna ports using a single DMRS symbol.

[0187] DMRS maps a pseudo-random sequence r(m) to a resource element (k,;). p,μ The formula can be expressed as follows:

[0188] If the high-level parameter dmrs-TypeEnh is configured, then

[0189]

[0190] otherwise

[0191]

[0192]

[0193] in,

[0194] This is the DMRS scaling factor;

[0195] w f (k′), w t (l′) and Δ are given in Table 2.

[0196] Table 2 Parameters for PDSCH DMRS Configuration Type 1 (4 CDM Groups)

[0197] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 3 3 [+1 +1 +1 +1] +1 1007 3 3 [+1 -1 +1 -1] +1 1008 0 0 [+1 +1 -1 -1] +1 1009 0 0 [+1 -1 -1 +1] +1 1010 1 1 [+1 +1 -1 -1] +1 1011 1 1 [+1 -1 -1 +1] +1 1012 2 2 [+1 +1 -1 -1] +1 1013 2 2 [+1 -1 -1 +1] +1 1014 3 3 [+1 +1 -1 -1] +1 1015 3 3 [+1 -1 -1 +1] +1

[0198] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 6 shown. Specifically, Figure 6 A schematic diagram of the DMRS frequency domain pattern for six CDM groups is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, six CDM groups are used. The method uses six CDM groups, combined with an OCC of length 4 in the frequency domain, and can support 24 antenna ports using a single DMRS symbol.

[0199] DMRS maps a pseudo-random sequence r(m) to a resource element (k,;). p,μ The formula can be expressed as follows:

[0200] If the high-level parameter dmrs-TypeEnh is configured, then

[0201]

[0202]

[0203] otherwise

[0204]

[0205] in,

[0206] This is the DMRS scaling factor;

[0207] w f (k′), w t (l′) and Δ are given in Table 3.

[0208] Table 3 Parameters for PDSCH DMRS Configuration Type 1 (6 CDM Groups)

[0209] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 3 3 [+1 +1 +1 +1] +1 1007 3 3 [+1 -1 +1 -1] +1 1008 4 4 [+1 +1 +1 +1] +1 1009 4 4 [+1 -1 +1 -1] +1 1010 5 5 [+1 +1 +1 +1] +1 1011 5 5 [+1 -1 +1 -1] +1 1012 0 0 [+1 +1 -1 -1] +1 1013 0 0 [+1 -1 -1 +1] +1 1014 1 1 [+1 +1 -1 -1] +1 1015 1 1 [+1 -1 -1 +1] +1 1016 2 2 [+1 +1 -1 -1] +1 1017 2 2 [+1 -1 -1 +1] +1 1018 3 3 [+1 +1 -1 -1] +1 1019 3 3 [+1 -1 -1 +1] +1 1020 4 4 [+1 +1 -1 -1] +1 1021 4 4 [+1 -1 -1 +1] +1 1022 5 5 [+1 +1 -1 -1] +1 1023 5 5 [+1 -1 -1 +1] +1

[0210] The use of 3, 4, or 6 CDM groups in configuration type 1 ensures a consistent number of REs across all antenna ports, which facilitates hardware implementation. More generally, according to embodiments of this disclosure, regardless of whether the DMRS is configured as configuration type 1 or configuration type 2, the frequency domain pattern of a DMRS symbol can be a combination of J CDM groups and an OCC of frequency domain length L, where J and K can be any positive integers. In this case, the product of J and K can represent the number of antenna ports that a DMRS symbol can support. When it is necessary for the number of antenna ports that a DMRS symbol can support to be greater than or equal to a specific threshold (e.g., a first threshold), J and K can be set such that their product is greater than or equal to that specific threshold.

[0211] Optionally, when the frequency domain pattern of a DMRS symbol uses more than two CDM groups, the same antenna port can have different RE position start offset positions for different DMRS symbol indices. The DMRS symbol index (also referred to as the index) refers to the symbol index containing only the DMRS symbol, or it can refer to the index of that DMRS symbol among all or one DMRS symbols used for a single PDSCH transmission. For example, the first DMRS symbol can have a symbol index of 0, the second DMRS symbol can have a symbol index of 1, and so on; or the first DMRS symbol can have a symbol index of 1, the second DMRS symbol can have a symbol index of 2, and so on.

[0212] In one specific implementation, when the DMRS is specified as configuration type 1 and the number of CDM groups is 4, the starting offset of the RE position at a certain antenna port in the DMRS symbol with an even-numbered symbol index is different from the starting offset of the corresponding RE position at the same antenna port in the DMRS symbol with an odd-numbered symbol index. Specifically, the difference can be 2. One specific implementation of this method can be as follows: Figure 7 As shown, Table 2 is now replaced by Tables 4 and 5. Specifically, Figure 7 A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure, when the DMRS is specified as configuration type 1 and the number of CDM groups is 4.

[0213] Table 4 shows the parameters for PDSCH DMRS configuration type 1 (4 CDM groups), where the DMRS symbol index is even.

[0214] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 3 3 [+1 +1 +1 +1] +1 1007 3 3 [+1 -1 +1 -1] +1 1008 0 0 [+1 +1 -1 -1] +1 1009 0 0 [+1 -1 -1 +1] +1 1010 1 1 [+1 +1 -1 -1] +1 1011 1 1 [+1 -1 -1 +1] +1 1012 2 2 [+1 +1 -1 -1] +1 1013 2 2 [+1 -1 -1 +1] +1 1014 3 3 [+1 +1 -1 -1] +1 1015 3 3 [+1 -1 -1 +1] +1

[0215] Table 5 shows the parameters for PDSCH DMRS configuration type 1 (4 CDM groups), where the DMRS symbol index is odd.

[0216] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 2 [+1 +1 +1 +1] +1 1001 0 2 [+1 -1 +1 -1] +1 1002 1 3 [+1 +1 +1 +1] +1 1003 1 3 [+1 -1 +1 -1] +1 1004 2 0 [+1 +1 +1 +1] +1 1005 2 0 [+1 -1 +1 -1] +1 1006 3 1 [+1 +1 +1 +1] +1 1007 3 1 [+1 -1 +1 -1] +1 1008 0 2 [+1 +1 -1 -1] +1 1009 0 2 [+1 -1 -1 +1] +1 1010 1 3 [+1 +1 -1 -1] +1 1011 1 3 [+1 -1 -1 +1] +1 1012 2 0 [+1 +1 -1 -1] +1 1013 2 0 [+1 -1 -1 +1] +1 1014 3 1 [+1 +1 -1 -1] +1 1015 3 1 [+1 -1 -1 +1] +1

[0217] After combining two DMRS symbols, the spacing between adjacent DMRS REs on a single DMRS symbol changes from 4 to 2. By using the method described above, where the starting offset positions of REs differ for different antenna ports with odd and even DMRS symbol index values, the number of DMRS REs belonging to the same antenna port on a DMRS symbol can be increased, thereby improving the accuracy of channel estimation. It is worth noting that the combining of different DMRS symbols is based on the premise that the channel is stable and does not change rapidly over time. An example after combining is shown below. Figure 8 shown. Specifically, Figure 8 A schematic diagram is shown illustrating the merging of two DMRS symbols when the DMRS is designated as configuration type 1 and the number of CDM groups is 4, according to an embodiment of the present disclosure.

[0218] In one specific implementation, when the DMRS is specified as configuration type 1 and the number of CDM groups is 6, the starting offset of the RE position at a certain antenna port in the DMRS symbol with an even-numbered symbol index is different from the starting offset of the corresponding RE position at the same antenna port in the DMRS symbol with an odd-numbered symbol index. Specifically, the difference can be 3. One specific implementation of this method can be as follows: Figure 9 As shown, Table 3 is now replaced by Tables 6 and 7. Specifically, Figure 9A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure, when the DMRS is specified as configuration type 1 and the number of CDM groups is 6.

[0219] Table 6 shows the parameters for PDSCH DMRS configuration type 1 (6 CDM groups), where the DMRS symbol index is even.

[0220] p CDM group λ Δ [[w f (0) … w f (3)]]]> w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 3 3 [+1 +1 +1 +1] +1 1007 3 3 [+1 -1 +1 -1] +1 1008 4 4 [+1 +1 +1 +1] +1 1009 4 4 [+1 -1 +1 -1] +1 1010 5 5 [+1 +1 +1 +1] +1 1011 5 5 [+1 -1 +1 -1] +1 1012 0 0 [+1 +1 -1 -1] +1 1013 0 0 [+1 -1 -1 +1] +1 1014 1 1 [+1 +1 -1 -1] +1 1015 1 1 [+1 -1 -1 +1] +1 1016 2 2 [+1 +1 -1 -1] +1 1017 2 2 [+1 -1 -1 +1] +1 1018 3 3 [+1 +1 -1 -1] +1 1019 3 3 [+1 -1 -1 +1] +1 1020 4 4 [+1 +1 -1 -1] +1 1021 4 4 [+1 -1 -1 +1] +1 1022 5 5 [+1 +1 -1 -1] +1 1023 5 5 [+1 -1 -1 +1] +1

[0221] Table 7 shows the parameters for PDSCH DMRS configuration type 1 (6 CDM groups), where the DMRS symbol index is odd.

[0222] p CDM group λ Δ [[w f (0) … w f (3)]]]> <![CDATA[w t (0)]]> 1000 0 3 [+1 +1 +1 +1] +1 1001 0 3 [+1 -1 +1 -1] +1 1002 1 4 [+1 +1 +1 +1] +1 1003 1 4 [+1 -1 +1 -1] +1 1004 2 5 [+1 +1 +1 +1] +1 1005 2 5 [+1 -1 +1 -1] +1 1006 3 0 [+1 +1 +1 +1] +1 1007 3 0 [+1 -1 +1 -1] +1 1008 4 1 [+1 +1 +1 +1] +1 1009 4 1 [+1 -1 +1 -1] +1 1010 5 2 [+1 +1 +1 +1] +1 1011 5 2 [+1 -1 +1 -1] +1 1012 0 3 [+1 +1 -1 -1] +1 1013 0 3 [+1 -1 -1 +1] +1 1014 1 4 [+1 +1 -1 -1] +1 1015 1 4 [+1 -1 -1 +1] +1 1016 2 5 [+1 +1 -1 -1] +1 1017 2 5 [+1 -1 -1 +1] +1 1018 3 0 [+1 +1 -1 -1] +1 1019 3 0 [+1 -1 -1 +1] +1 1020 4 1 [+1 +1 -1 -1] +1 1021 4 1 [+1 -1 -1 +1] +1 1022 5 2 [+1 +1 -1 -1] +1 1023 5 2 [+1 -1 -1 +1] +1

[0223] After combining two DMRS symbols, the spacing between adjacent DMRS REs on a DMRS symbol changes from 6 to 3. By using the method described above, where the starting offset position of the RE differs for different antenna ports with odd and even DMRS symbol index values, the number of DMRS REs belonging to the same antenna port on a DMRS symbol can be increased, thereby improving the accuracy of channel estimation.

[0224] In one specific implementation, when the DMRS is specified as configuration type 1 and the number of CDM groups is 6, the starting offset of the RE position corresponding to the same antenna port in DMRS symbols with different symbol indices is different. Specifically, the difference can be 2. One specific implementation of this method can be as follows: Figure 10 As shown, Table 4 is now replaced by Tables 8, 9, and 10. Specifically, Figure 10 A schematic diagram of the DMRS frequency domain pattern for different DMRS symbol indices is shown according to an embodiment of the present disclosure, when the DMRS is specified as configuration type 1 and the number of CDM groups is 6.

[0225] Table 8. Parameters for PDSCH DMRS Configuration Type 1 (6 CDM groups), mod(m,3) = 0

[0226] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 1 [+1 +1 +1 +1] +1 1003 1 1 [+1 -1 +1 -1] +1 1004 2 2 [+1 +1 +1 +1] +1 1005 2 2 [+1 -1 +1 -1] +1 1006 3 3 [+1 +1 +1 +1] +1 1007 3 3 [+1 -1 +1 -1] +1 1008 4 4 [+1 +1 +1 +1] +1 1009 4 4 [+1 -1 +1 -1] +1 1010 5 5 [+1 +1 +1 +1] +1 1011 5 5 [+1 -1 +1 -1] +1 1012 0 0 [+1 +1 -1 -1] +1 1013 0 0 [+1 -1 -1 +1] +1 1014 1 1 [+1 +1 -1 -1] +1 1015 1 1 [+1 -1 -1 +1] +1 1016 2 2 [+1 +1 -1 -1] +1 1017 2 2 [+1 -1 -1 +1] +1 1018 3 3 [+1 +1 -1 -1] +1 1019 3 3 [+1-1 -1 +1] +1 1020 4 4 [+1 +1 -1 -1] +1 1021 4 4 [+1 -1 -1 +1] +1 1022 5 5 [+1 +1 -1 -1] +1 1023 5 5 [+1 -1 -1 +1] +1

[0227] Table 9. Parameters for PDSCH DMRS Configuration Type 1 (6 CDM groups), mod(m,3) = 1

[0228] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 2 [+1 +1 +1 +1] +1 1001 0 2 [+1 -1 +1 -1] +1 1002 1 3 [+1 +1 +1 +1] +1 1003 1 3 [+1 -1 +1 -1] +1 1004 2 4 [+1 +1 +1 +1] +1 1005 2 4 [+1 -1 +1 -1] +1 1006 3 5 [+1 +1 +1 +1] +1 1007 3 5 [+1 -1 +1 -1] +1 1008 4 0 [+1 +1 +1 +1] +1 1009 4 0 [+1 -1 +1 -1] +1 1010 5 1 [+1 +1 +1 +1] +1 1011 5 1 [+1 -1 +1 -1] +1 1012 0 2 [+1 +1 -1 -1] +1 1013 0 2 [+1 -1 -1 +1] +1 1014 1 3 [+1 +1 -1 -1] +1 1015 1 3 [+1 -1 -1 +1] +1 1016 2 4 [+1 +1 -1 -1] +1 1017 2 4 [+1 -1 -1 +1] +1 1018 3 5 [+1 +1 -1 -1] +1 1019 3 5 [+1 -1 -1 +1] +1 1020 4 0 [+1 +1 -1 -1] +1 1021 4 0 [+1 -1 -1 +1] +1 1022 5 1 [+1 +1 -1 -1] +1 1023 5 1 [+1 -1 -1 +1] +1

[0229] Table 10 Parameters for PDSCH DMRS Configuration Type 1 (6 CDM groups), mod(m,3) = 2

[0230] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 4 [+1 +1 +1 +1] +1 1001 0 4 [+1 -1 +1 -1] +1 1002 1 5 [+1 +1 +1 +1] +1 1003 1 5 [+1 -1 +1 -1] +1 1004 2 0 [+1 +1 +1 +1] +1 1005 2 0 [+1 -1 +1 -1] +1 1006 3 1 [+1 +1 +1 +1] +1 1007 3 1 [+1 -1 +1 -1] +1 1008 4 2 [+1 +1 +1 +1] +1 1009 4 2 [+1 -1 +1 -1] +1 1010 5 3 [+1 +1 +1 +1] +1 1011 5 3 [+1 -1 +1 -1] +1 1012 0 4 [+1 +1 -1 -1] +1 1013 0 4 [+1 -1 -1 +1] +1 1014 1 5 [+1 +1 -1 -1] +1 1015 1 5 [+1 -1 -1 +1] +1 1016 2 0 [+1 +1 -1 -1] +1 1017 2 0 [+1 -1 -1 +1] +1 1018 3 1 [+1 +1 -1 -1] +1 1019 3 1 [+1 -1 -1 +1] +1 1020 4 2 [+1 +1 -1 -1] +1 1021 4 2 [+1 -1 -1 +1] +1 1022 5 3 [+1 +1 -1 -1] +1 1023 5 3 [+1 -1 -1 +1] +1

[0231] Here, mod(m,3) represents the remainder when the DMRS symbol index value m is divided by 3.

[0232] After combining three DMRS symbols, the spacing between adjacent DMRS REs on a single DMRS symbol changes from 6 to 2. Combining DMRS symbols with three REs at different starting offsets increases the number of DMRS REs belonging to the same antenna port on the DMRS symbol, thereby improving the accuracy of channel estimation.

[0233] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 11 shown. Specifically, Figure 11 A schematic diagram of the DMRS frequency domain pattern of four CDM groups is shown when the DMRS is designated as configuration type 2 according to an embodiment of the present disclosure. When the DMRS is designated as configuration type 2, using four CDM groups in combination with an OCC of length 4 in the frequency domain, 16 antenna ports can be supported using a single DMRS symbol.

[0234] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0235] If the high-level parameter dmrs-TypeEnh is configured, then

[0236]

[0237] otherwise

[0238]

[0239] in,

[0240] This is the DMRS scaling factor;

[0241] w f (k′), w t (l′) and Δ are given in Table 11.

[0242] Table 11 Parameters for PDSCH DMRS Configuration Type 2 (4 CDM Groups)

[0243] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 2 [+1 +1 +1 +1] +1 1003 1 2 [+1 -1 +1 -1] +1 1004 2 4 [+1 +1 +1 +1] +1 1005 2 4 [+1 -1 +1 -1] +1 1006 3 6 [+1 +1 +1 +1] +1 1007 3 6 [+1 -1 +1 -1] +1 1008 0 0 [+1 +1 -1 -1] +1 1009 0 0 [+1 -1 -1 +1] +1 1010 1 2 [+1 +1 -1 -1] +1 1011 1 2 [+1 -1 -1 +1] +1 1012 2 4 [+1 +1 -1 -1] +1 1013 2 4 [+1 -1 -1 +1] +1 1014 3 6 [+1 +1 -1 -1] +1 1015 3 6 [+1 -1 -1 +1] +1

[0244] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 12 shown. Specifically, Figure 12A schematic diagram of the DMRS frequency domain pattern of five CDM groups is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 2. When the DMRS is designated as configuration type 2, using five CDM groups combined with an OCC of length 4 in the frequency domain, 20 antenna ports can be supported using a single DMRS symbol.

[0245] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0246] If the high-level parameter dmrs-TypeEnh is configured, then

[0247]

[0248] otherwise

[0249]

[0250]

[0251] in,

[0252] This is the DMRS scaling factor;

[0253] w f (k′), w t (l′) and Δ are given in Table 12.

[0254] Table 12 Parameters for PDSCH DMRS Configuration Type 2 (5 CDM Groups)

[0255] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 2 [+1 +1 +1 +1] +1 1003 1 2 [+1 -1 +1 -1] +1 1004 2 4 [+1 +1 +1 +1] +1 1005 2 4 [+1 -1 +1 -1] +1 1006 3 6 [+1 +1 +1 +1] +1 1007 3 6 [+1 -1 +1 -1] +1 1008 4 8 [+1 +1 +1 +1] +1 1009 4 8 [+1 -1 +1 -1] +1 1010 0 0 [+1 +1 -1 -1] +1 1011 0 0 [+1 -1 -1 +1] +1 1012 1 2 [+1 +1 -1 -1] +1 1013 1 2 [+1 -1 -1 +1] +1 1014 2 4 [+1 +1 -1 -1] +1 1015 2 4 [+1 -1 -1 +1] +1 1016 3 6 [+1 +1 -1 -1] +1 1017 3 6 [+1 -1 -1 +1] +1 1018 4 8 [+1 +1 -1 -1] +1 1019 4 8 [+1 -1 -1 +1] +1

[0256] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 13 shown. Specifically, Figure 13 A schematic diagram of the DMRS frequency domain pattern of six CDM groups is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 2. When the DMRS is designated as configuration type 2, using six CDM groups combined with an OCC of length 4 in the frequency domain, 24 antenna ports can be supported using a single DMRS symbol.

[0257] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0258] If the high-level parameter dmrs-TypeEnh is configured, then

[0259]

[0260] otherwise

[0261]

[0262] in,

[0263] This is the DMRS scaling factor;

[0264] w f (k′), w t (l′) and Δ are given in Table 13.

[0265] Table 13 Parameters for PDSCH DMRS Configuration Type 2 (6 CDM Groups)

[0266] p CDM group λ Δ <![CDATA[[w f (0) … in f (3)]]]> <![CDATA[w t (0)]]> 1000 0 0 [+1 +1 +1 +1] +1 1001 0 0 [+1 -1 +1 -1] +1 1002 1 2 [+1 +1 +1 +1] +1 1003 1 2 [+1 -1 +1 -1] +1 1004 2 4 [+1 +1 +1 +1] +1 1005 2 4 [+1 -1 +1 -1] +1 1006 3 6 [+1 +1 +1 +1] +1 1007 3 6 [+1 -1 +1 -1] +1 1008 4 8 [+1 +1 +1 +1] +1 1009 4 8 [+1 -1 +1 -1] +1 1010 5 10 [+1 +1 +1 +1] +1 1011 5 10 [+1 -1 +1 -1] +1 1012 0 0 [+1 +1 -1 -1] +1 1013 0 0 [+1 -1 -1 +1] +1 1014 1 2 [+1 +1 -1 -1] +1 1015 1 2 [+1 -1 -1 +1] +1 1016 2 4 [+1 +1 -1 -1] +1 1017 2 4 [+1 -1 -1 +1] +1 1018 3 6 [+1 +1 -1 -1] +1 1019 3 6 [+1 -1 -1 +1] +1 1020 4 8 [+1 +1 -1 -1] +1 1021 4 8 [+1 -1 -1 +1] +1 1022 5 10 [+1 +1 -1 -1] +1 1023 5 10 [+1 -1 -1 +1] +1

[0267] Optionally, the method of having different RE starting offset positions for the same antenna port indexed by different DMRS symbols can also be applied when the DMRS is specified as configuration type 2. In this case, merging several DMRS symbols can increase the number of DMRS REs for a single antenna port in the frequency domain of the DMRS symbol, thereby improving the accuracy of channel estimation.

[0268] Optionally, the frequency domain pattern of the DMRS symbol can also increase the number of antenna ports that a DMRS symbol can support by increasing the sequence length of the frequency domain OCC, so that a DMRS symbol can support a number of antenna ports comparable to two DMRS symbols.

[0269] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 14 shown. Specifically, Figure 14 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 5 is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, using an OCC of length 5 in combination with two CDM groups, 10 antenna ports can be supported using a single DMRS symbol.

[0270] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0271]

[0272] This is the DMRS scaling factor;

[0273] w f (k′), w t (l′) and Δ are given in Table 14.

[0274] Table 14 Parameters for PDSCH DMRS Configuration Type 1 (Frequency Domain OCC with a length of 5)

[0275]

[0276] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 15 shown. Specifically, Figure 15 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 6 is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, using an OCC of length 6 in combination with two CDM groups, 12 antenna ports can be supported using a single DMRS symbol.

[0277] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0278]

[0279] This is the DMRS scaling factor;

[0280] w f (k′), w t (l′) and Δ are given in Table 15.

[0281] Table 15 Parameters for PDSCH DMRS Configuration Type 1 (Frequency Domain OCC of Length 6)

[0282]

[0283] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 16 shown. Specifically, Figure 16 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 7 is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, using an OCC of length 7 in combination with two CDM groups, 14 antenna ports can be supported using a single DMRS symbol.

[0284] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0285]

[0286]

[0287] This is the DMRS scaling factor;

[0288] w f (k′), w t (l′) and Δ are given in Table 16.

[0289] Table 16 Parameters for PDSCH DMRS Configuration Type 1 (Frequency Domain OCC of Length 7)

[0290]

[0291] A specific embodiment of the frequency domain pattern according to the embodiments of this disclosure can be as follows: Figure 17 shown. Specifically, Figure 17 A schematic diagram of a DMRS frequency domain pattern with an OCC length of 8 is shown according to an embodiment of the present disclosure when the DMRS is designated as configuration type 1. When the DMRS is designated as configuration type 1, using an OCC of length 8 in combination with two CDM groups, 16 antenna ports can be supported using a single DMRS symbol.

[0292] DMRS maps a pseudo-random sequence r(m) to a resource element (k,l). p,μ The formula can be expressed as follows:

[0293]

[0294] This is the DMRS scaling factor;

[0295] w f (k′), w t (l′) and Δ are given in Table 17.

[0296] Table 17 Parameters for PDSCH DMRS Configuration Type 1 (Frequency Domain OCC with a length of 8)

[0297]

[0298] Using frequency domain OCCs of different sequence lengths can increase the number of antenna ports that a single DMRS symbol can support, and this method does not reduce the number of REs at different ports compared to increasing the CDM length.

[0299] Optionally, the method of increasing the frequency domain OCC sequence length can be combined with the higher-level parameter dmrs-TypeEnh to support the use of partial antenna ports. Specifically, when the higher-level parameter dmrs-TypeEnh is configured, all antenna ports can be used; otherwise, partial antenna ports are used.

[0300] Optionally, the method of increasing the length of the frequency-domain OCC sequence can also be applied when the DMRS is designated as configuration type 2 to increase the number of antenna ports supported by a single DMRS.

[0301] In the embodiments of the present disclosure, the indexing order of the antenna ports may change, and the group order of the corresponding CDM groups and / or the order of the offset Δ may also change. This standard only gives an example and does not limit the order of the index numbers.

[0302] The methods of increasing the number of CDM groups and / or increasing the length of the frequency-domain OCC sequence and / or using different starting offsets of RE positions for the same antenna port in different DMRS symbol indexes in the embodiments of the present disclosure can be combined arbitrarily. The use of one or more combinations thereof is still within the protection scope of the present invention.

[0303] It should be understood that depending on the application scenario, the various example aspects, methods, steps, processes, etc. shown in combination with the accompanying drawings can be combined and implemented in any manner, and there is no limitation in this article.

[0304] Next, Figure 18 FIG. 1800 is a flowchart of a method performed by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure.

[0305] As Figure 18 shown, the method 1800 performed by a user equipment (UE) in a wireless communication system according to an embodiment of the present disclosure may include: in step S1801, receiving first information from a first node, the first information including third information related to the number of reference signals and / or fourth information related to the time-domain interval of the reference signals; and in step S1802, receiving a physical downlink shared channel PDSCH transmission from the first node, wherein the PDSCH transmission is scheduled for transmission on a plurality of time slots. In some embodiments, the reference signal is used for demodulation of the PDSCH transmission.

[0306] According to an embodiment of the present disclosure, the third information includes the number M of the reference signals, where M satisfies any one of the following: M = 1; 1 < M < N; M = N, where N is the number of time slots of the plurality of time slots used for the PDSCH transmission.

[0307] According to an embodiment of the present disclosure, the fourth information includes the symbol interval of the reference signals, and the symbol interval includes at least one of the following: the number of symbols between two adjacent reference signals; the number of symbols for the PDSCH transmission between two adjacent reference signals.

[0308] According to embodiments of this disclosure, the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a first mode, and determining the symbol position of the reference signal based on the first mode includes at least one of the following: determining the symbol position of other reference signals in the reference signal besides the first reference signal based on a first symbol position and a first time-domain interval of the reference signal, wherein the first symbol position is the symbol position of the first reference signal in the reference signal in a first time slot used for PDSCH transmission; or determining the symbol position of other reference signals in the reference signal besides the last reference signal based on a second symbol position and a first time-domain interval of the reference signal, wherein the second symbol position is the symbol position of the last reference signal in the reference signal in a last time slot used for PDSCH transmission.

[0309] According to embodiments of this disclosure, the first time-domain interval is determined based on a first number of symbols and the number of reference signals, wherein the first number of symbols includes at least one of the following: the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the second symbol position; the number of symbols from the first symbol position to the previous symbol of the first reference signal in the first time slot used for the next scheduled PDSCH transmission; and the sum of the number of symbols used for PDSCH transmission in the plurality of time slots used for PDSCH transmission.

[0310] According to embodiments of this disclosure, the first symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the first time slot; the third or fourth symbol position in the first time slot; the Cth symbol position used for PDSCH transmission in the first time slot, where C is an integer greater than 1; and wherein the second symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the last time slot; the third or fourth symbol position in the last time slot; the Eth symbol position used for PDSCH transmission in the last time slot, where E is an integer greater than 1.

[0311] According to embodiments of this disclosure, when the symbol position of the first reference signal in the reference signal conflicts with other channels or signals, determining the symbol position of the reference signal based on the first mode further includes at least one of the following: determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a second time-domain interval based on the symbol position of the previous reference signal of the first reference signal and the determined symbol position; and determining the symbol position of the reference signal following the first reference signal based on the second time-domain interval; determining the symbol position of the first reference signal and the reference signals following it based on the symbol position of the previous reference signal of the first reference signal and a third time-domain interval, wherein the third time-domain interval is included in the fourth information or determined based on the first time-domain interval.

[0312] According to embodiments of this disclosure, the fourth information includes a time slot interval, wherein the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a second mode, wherein determining the symbol position of the reference signal based on the second mode includes determining at least one of the following as a time slot occupied by the reference signal: a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the number of reference signals; a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the time slot interval of the reference signals; and, in the event of an interruption in the PDSCH transmission, restarting the PDSCH transmission in a first time slot.

[0313] According to embodiments of this disclosure, in each of the time slots occupied by the reference signal, the symbol position of the reference signal includes at least one of the following: the first symbol position in the time slot used for the PDSCH transmission; the third or fourth symbol position in the time slot; the Fth symbol position in the time slot used for the PDSCH transmission, where F is an integer greater than 1.

[0314] According to an embodiment of this disclosure, the frequency domain pattern of the reference signal includes: for a reference signal, J code division multiplexing (CDM) groups and an orthogonal overlay code (OCC) with a frequency domain length of K are used, wherein J and K are positive integers, and the product of J and K is greater than or equal to a first threshold.

[0315] According to an embodiment of the present disclosure, for the same antenna port, the starting offset of the resource element (RE) position of the reference signal with an even reference signal index in the reference signal is different from the starting offset of the RE position of the reference signal with an odd reference signal index in the reference signal.

[0316] Figure 19 FIG. 1900 is a flowchart of a method performed by a first node in a wireless communication system according to an embodiment of the present disclosure.

[0317] As Figure 19 shown, the method 1900 performed by the first node in the wireless communication system according to an embodiment of the present disclosure may include: in step S1901, sending first information to a user equipment (UE), the first information including third information related to the number of reference signals and / or fourth information related to the time domain interval of the reference signals; and in step 1902, sending a physical downlink shared channel (PDSCH) transmission to the UE, where the PDSCH transmission is scheduled for transmission on a plurality of time slots. In some embodiments, the reference signals are used for demodulation of the PDSCH transmission.

[0318] According to an embodiment of the present disclosure, the third information includes the number M of the reference signals, where M satisfies any one of the following: M = 1; 1 < M < N; M = N, where N is the number of time slots of the plurality of time slots for the PDSCH transmission.

[0319] According to an embodiment of the present disclosure, the fourth information includes the symbol interval of the reference signals, and the symbol interval includes at least one of the following: the number of symbols between two adjacent reference signals; the number of symbols for the PDSCH transmission between two adjacent reference signals.

[0320] According to an embodiment of the present disclosure, the first information further includes fifth information related to a mode for determining the symbol position of the reference signals, where the fifth information includes a first mode, and determining the symbol position of the reference signals based on the first mode includes at least one of the following: determining the symbol position of other reference signals except the first reference signal in the reference signals based on a first symbol position and a first time domain interval of the reference signals, where the first symbol position is the symbol position of the first reference signal in the first time slot for the PDSCH transmission; or determining the symbol position of other reference signals except the last reference signal in the reference signals based on a second symbol position and the first time domain interval of the reference signals, where the second symbol position is the symbol position of the last reference signal in the last time slot for the PDSCH transmission.

[0321] According to embodiments of this disclosure, the first time-domain interval is determined based on a first number of symbols and the number of reference signals, wherein the first number of symbols includes at least one of the following: the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the last symbol in the last time slot used for PDSCH transmission; the number of symbols from the first symbol position to the second symbol position; the number of symbols from the first symbol position to the previous symbol of the first reference signal in the first time slot used for the next scheduled PDSCH transmission; and the sum of the number of symbols used for PDSCH transmission in the plurality of time slots used for PDSCH transmission.

[0322] According to embodiments of this disclosure, the first symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the first time slot; the third or fourth symbol position in the first time slot; the Cth symbol position used for PDSCH transmission in the first time slot, where C is an integer greater than 1; and wherein the second symbol position includes one or more of the following: the first symbol position used for PDSCH transmission in the last time slot; the third or fourth symbol position in the last time slot; the Eth symbol position used for PDSCH transmission in the last time slot, where E is an integer greater than 1.

[0323] According to embodiments of this disclosure, when the symbol position of the first reference signal in the reference signal conflicts with other channels or signals, determining the symbol position of the reference signal based on the first mode further includes at least one of the following: determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a symbol position for PDSCH transmission adjacent to the symbol position of the first reference signal as the symbol position of the first reference signal; determining a second time-domain interval based on the symbol position of the previous reference signal of the first reference signal and the determined symbol position; and determining the symbol position of the reference signal following the first reference signal based on the second time-domain interval; determining the symbol position of the first reference signal and the reference signals following it based on the symbol position of the previous reference signal of the first reference signal and a third time-domain interval, wherein the third time-domain interval is included in the fourth information or determined based on the first time-domain interval.

[0324] According to embodiments of this disclosure, the fourth information includes a time slot interval, wherein the first information further includes fifth information related to a mode for determining the symbol position of the reference signal, wherein the fifth information includes a second mode, wherein determining the symbol position of the reference signal based on the second mode includes determining at least one of the following as a time slot occupied by the reference signal: a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the number of reference signals; a time slot determined based on the number of time slots for the plurality of time slots used for the PDSCH transmission and the time slot interval of the reference signals; and, in the event of an interruption in the PDSCH transmission, restarting the PDSCH transmission in a first time slot.

[0325] According to embodiments of this disclosure, in each of the time slots occupied by the reference signal, the symbol position of the reference signal includes at least one of the following: the first symbol position in the time slot used for the PDSCH transmission; the third or fourth symbol position in the time slot; the Fth symbol position in the time slot used for the PDSCH transmission, where F is an integer greater than 1.

[0326] According to an embodiment of this disclosure, the frequency domain pattern of the reference signal includes: for a reference signal, J code division multiplexing (CDM) groups and an orthogonal overlay code (OCC) with a frequency domain length of K are used, wherein J and K are positive integers, and the product of J and K is greater than or equal to a first threshold.

[0327] According to embodiments of this disclosure, for the same antenna port, the starting offset of the resource element (RE) position of the reference signal with an even reference signal index is different from the starting offset of the RE position of the reference signal with an odd reference signal index.

[0328] Before receiving configuration information of the time-domain and / or frequency-domain patterns of the DMRS for PDSCH from the first node, the UE may also perform measurements (e.g., channel estimation, etc.) on the channels and / or related resources used to transmit the PDSCH. For example, the UE may perform channel stability-related measurements on the channels and / or related resources used to transmit the PDSCH. The measurement results (e.g., including information related to channel stability, or channel estimation results, etc.) may be used to determine (e.g., for the UE and / or the first node to determine) whether to configure the time-domain and / or frequency-domain patterns of the DMRS in this disclosure, and / or specific configuration parameters. For example, the UE may send the measurement results to the first node, and the first information mentioned above may be determined based on the measurement results.

[0329] The channel stability (which may also be referred to herein as the channel estimation result or measurement result obtained based on the reference signal, or the measurement result of channel stability) includes at least one of the following: the channel correlation coefficient in the time domain, and the channel correlation coefficient in the frequency domain. The channel stability can be the channel estimation result obtained based on the reference signal, which can be the channel state information reference signal (CSI-RS).

[0330] The time-domain channel correlation coefficient can be the CSI channel correlation coefficient in the time domain, defined as a coefficient used to quantify the similarity (or correlation) between channel estimates based on CSI-RS at different times, where the channel estimates are acquired based on one or more reference ports and / or one or more reference subcarriers located in the active downlink bandwidth portion (BWP). The time-domain channel correlation coefficient reflects the dynamic changes in the time-domain channel state.

[0331] For example, the measurement results may include time-domain measurement results obtained based on CSI-RS received from the first node for time-domain measurement (or time-domain channel estimation). In some implementations, the time-domain measurement results may be determined based on the similarity or correlation between the channel estimation results of CSI-RS on the first time unit and the channel estimation results of CSI-RS on the second time unit.

[0332] In some implementations, the first time unit and the second time unit can be any two different time units among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node. For example, the first time unit can be the first time unit among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node, and the second time unit can be any other time unit among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node, excluding the first time unit. For example, the first time unit can be the first time unit among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node, and the second time unit can be the last time unit among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node, and so on. For example, the first time unit and / or the second time unit can be any time unit configured or specified by the first node. For example, the first time unit and / or the second time unit can be the time unit located at the center position among all time units occupied by the CSI-RS configured for time-domain channel estimation for the first node, and so on. In this disclosure, a time unit can refer to a time-domain symbol, a time slot, a subframe, or a frame, etc.

[0333] In one example, the formula for calculating the CSI time-domain channel correlation coefficient is defined as follows:

[0334]

[0335] in,

[0336] A: Channel estimation based on CSI-RS at the first time t1;

[0337] B: Channel estimation based on CSI-RS at the second time t2;

[0338] A f The element with index f in the channel estimation vector or matrix A;

[0339] B f The element with index f in the channel estimation vector or matrix B;

[0340] The average of all elements in A;

[0341] The average of all elements in B.

[0342] Figure 22 A schematic diagram is shown of the variables involved in the calculation of the CSI time-domain channel correlation coefficient.

[0343] The channel correlation coefficient in the frequency domain can be the CSI channel correlation coefficient in the frequency domain, defined as a coefficient used to quantify the similarity of channel estimates based on CSI-RS at different frequencies, where the channel estimation is obtained based on one or more reference ports and / or one or more time-domain reference units. The time-domain reference unit can be a time-domain symbol, time slot, subframe, or frame, etc., and is not limited here. The channel correlation coefficient in the frequency domain reflects the dynamic changes in the frequency-domain channel state.

[0344] For example, the measurement results may include frequency domain measurement results obtained based on CSI-RS received from the first node for frequency domain measurement (or frequency domain channel estimation). In some embodiments, the frequency domain measurement results may be determined based on the similarity or correlation between the channel estimation results of CSI-RS on the first frequency domain unit and the channel estimation results of CSI-RS on the second frequency domain unit.

[0345] In some implementations, the first frequency domain unit and the second frequency domain unit can be any two different frequency domain units among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node. For example, the first frequency domain unit can be the first frequency domain unit among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node, and the second frequency domain unit can be any other frequency domain unit among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node, excluding the first frequency domain unit. For example, the first frequency domain unit can be the first frequency domain unit among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node, and the second frequency domain unit can be the last frequency domain unit among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node, and so on. For example, the first frequency domain unit and / or the second frequency domain unit can be any frequency domain unit configured or specified by the first node. For example, the first frequency domain unit and / or the second frequency domain unit can be the frequency domain unit located at the center position among all frequency domain units occupied by the CSI-RS for frequency domain channel estimation configured by the first node, and so on. In this disclosure, a frequency domain element may refer to a subcarrier, carrier, RE, or RB in the frequency domain.

[0346] In one example, the formula for calculating the CSI frequency domain channel correlation coefficient is defined as follows:

[0347]

[0348] in,

[0349] A: Channel estimation based on CSI-RS at the first frequency f1;

[0350] B: Channel estimation based on CSI-RS at the second frequency f2;

[0351] A t The element with index t in the channel estimation vector or matrix A;

[0352] B t The element with index t in the channel estimation vector or matrix B;

[0353] The average of all elements in A;

[0354] The average of all elements in B.

[0355] Figure 23 A schematic diagram of the variables involved in the calculation of the CSI frequency domain channel correlation coefficient is shown.

[0356] The channel estimation is based on a channel estimation algorithm, including at least one of the following: least squares (LS), minimum mean square error (MMSE), and linear minimum mean square error (LMMSE). Standardized channel estimation algorithms are a prerequisite for establishing a unified measurement standard. Among these, the LS algorithm is computationally simple and has a closed-form solution; MMSE can achieve optimal channel estimation accuracy in uncertain scenarios; and the LMMSE algorithm can balance computational efficiency and performance.

[0357] In some implementations, the UE can receive CSI report configuration related to the measurement results from the first node. The CSI report configuration may include one or more of the following: a resource set for CSI time-domain channel correlation coefficient measurement, a resource set for CSI frequency-domain channel correlation coefficient measurement, and indication information related to the quantization of the measurement results.

[0358] In some implementations, the indication information related to the quantization of the measurement result may include information related to at least one of the following: one or more quantization levels for quantizing the measurement result, one or more threshold ranges corresponding to the one or more quantization levels, the number of one or more quantization levels, and the quantization method of the measurement result.

[0359] For example, the UE can receive a channel state information (CSI) report configuration related to the measurement results (e.g., related to channel stability) from the first node, then perform the channel stability measurement based on the CSI report configuration, and report the measurement results. The method of reporting the measurement results includes at least one of the following: reporting the channel stability of a given resource, or reporting the resource index that meets the channel stability requirements.

[0360] The CSI report configuration corresponding to the method of reporting the channel stability of a given resource includes information related to at least one of the following: the resource set for CSI time-domain channel correlation coefficient measurement, the resource set for CSI frequency-domain channel correlation coefficient measurement, and indication information related to the quantization of the measurement results (e.g., it may be called the quantization category indication of the channel correlation coefficient, or any other name).

[0361] The resource set used for CSI time-domain channel correlation coefficient measurement indicates a set of reference signal resources, such as a set of CSI-RS reference signal resources, used for CSI time-domain channel correlation coefficient calculation. When the CSI report configuration received by the UE from the first node includes the resource set for CSI time-domain channel correlation coefficient measurement, the UE is implicitly notified to report the time-domain channel stability. Thus, the UE performs time-domain channel correlation coefficient measurement.

[0362] The resource set used for CSI frequency domain channel correlation coefficient measurement indicates a set of reference signal resources, such as a set of CSI-RS reference signal resources, used for CSI frequency domain channel correlation coefficient calculation. When the CSI report configuration received by the UE from the first node includes the resource set for CSI frequency domain channel correlation coefficient measurement, the UE is implicitly notified to report the channel stability in the frequency domain. Thus, the UE performs frequency domain channel correlation coefficient measurement.

[0363] The resource configuration method described above can reduce the signaling overhead of the first node instructing the UE to perform channel stability measurements in the time or frequency domain.

[0364] The quantization category indication of the channel correlation coefficient corresponds to at least one of the following: a predefined quantization threshold range level and / or the number of quantization threshold range levels and / or the corresponding quantization threshold range, and the method by which the UE determines the reported channel correlation coefficient level.

[0365] A specific implementation of the predefined quantization threshold range levels and / or the number of quantization threshold range levels and / or the corresponding quantization threshold ranges is to divide the total quantization range (e.g., [0, 1]) into several threshold ranges, each corresponding to a level. For example, the quantization range is divided into three threshold ranges, each corresponding to a level: Level 1 corresponds to a threshold range greater than 0.8 and less than or equal to 1.0, i.e., (0.8, 1.0]; Level 2 corresponds to a threshold range greater than 0.5 and less than or equal to 0.8, i.e., (0.5, 0.8]; and Level 3 corresponds to a threshold range greater than or equal to 0 and less than or equal to 0.5, i.e., [0, 0.5]. Using the quantization threshold range levels to determine the UE's reporting results can save the high signaling overhead caused by the UE reporting specific measurement results. For example, directly reporting a 32-bit floating-point coefficient requires 4 bytes, while reporting 3 levels only requires 2 bits, saving up to 98% of data transmission.

[0366] When the quantization category indication of the channel correlation coefficient corresponds to a predefined quantization threshold range level and / or the number of quantization threshold range levels and / or the corresponding quantization threshold range, a specific implementation can be as follows: different quantization category indications of the channel correlation coefficient correspond to different predefined quantization threshold range levels and / or the number of quantization threshold range levels and / or the corresponding quantization threshold range. For example, when the quantization category indication of the channel correlation coefficient is 0, the corresponding number of quantization threshold range levels is three, and the three threshold ranges are (0.8, 1.0], (0.5, 0.8], and [0, 0.5]. When the quantization category indication of the channel correlation coefficient is 1, the corresponding number of quantization threshold range levels is five, and the five threshold ranges are (0.9, 1.0], (0.8, 0.9], (0.7, 0.8], (0.5, 0.7], and [0, 0.5]. In this case, the quantization threshold range is further refined. Using this method, adaptive adjustment can be supported to adjust the reported measurement accuracy according to specific needs.

[0367] The UE can determine the reported channel correlation coefficient level in at least one of the following ways: by comparing the absolute value of the calculated channel correlation coefficient with a quantization threshold range, and then reporting the corresponding level; or by comparing the calculated channel correlation coefficient with a quantization threshold range, and then reporting the corresponding level. The channel correlation coefficient calculated using the formula ranges from -1 to 1. Taking the absolute value of the calculated channel correlation coefficient and then judging the level can determine the stability of the channel. For example, the closer the absolute value is to 1, the more stable the channel; the closer the absolute value is to 0, the less stable the channel. Directly judging the level using the channel correlation coefficient can further determine whether two channels are positively correlated. For example, the closer the channel correlation coefficient is to 1, the more positively linearly correlated the two channels are; the closer the channel correlation coefficient is to 0, the less correlated the two channels are; and the closer the channel correlation coefficient is to -1, the more negatively linearly correlated the two channels are.

[0368] The specific implementation of comparing the absolute value of the calculated channel correlation coefficient with a quantization threshold range and then reporting the corresponding level is as follows: The total quantization range is 0 to 1 (e.g., [0,1]). This total range is divided, for example, into three threshold ranges or levels: Level 1 corresponds to a threshold range of (0.8,1.0], Level 2 corresponds to a threshold range of (0.5,0.8], and Level 3 corresponds to a threshold range of [0,0.5]. The absolute value of the calculated channel stability measurement result is compared with one or more of the threshold ranges or levels to obtain the reporting level (e.g., the level corresponding to the threshold range to which the absolute value of the measurement result belongs). This method can determine the stability of the channel.

[0369] The specific implementation of comparing the calculated channel correlation coefficient with the quantization threshold range and then reporting the corresponding level is as follows: The total quantization range is -1 to 1 (e.g., [-1, 1]). This total range is divided, for example, into six threshold ranges or levels. The threshold range corresponding to level one is (0.8, 1.0], level two is (0.5, 0.8], level three is (0, 0.5], level four is (-0.5, 0], level five is (-0.8, 0.5], and level six is ​​[-1.0, -0.8]. The calculated channel stability measurement result is compared with the level to obtain the reporting level (e.g., the level corresponding to the threshold range to which the measurement result belongs). This method can determine the positive stability of the channel.

[0370] One specific implementation of the quantization category indication of the channel correlation coefficient can be that, for a certain channel correlation coefficient quantization category indication, a predefined quantization threshold range and / or the number of quantization threshold range levels, and / or the method by which the UE determines the reported channel correlation coefficient level can be obtained accordingly. For example, when the quantization category indicator of the channel correlation coefficient is 0, there are three predefined quantization threshold ranges: Level 1 is (0.8, 1.0], Level 2 is (0.5, 0.8], and Level 3 is [0, 0.5]. The UE determines the reported channel correlation coefficient level by comparing the absolute value of the calculated channel correlation coefficient with the quantization threshold range. As another example, when the quantization category indicator of the channel correlation coefficient is 1, there are six predefined quantization threshold ranges: Level 1 is (0.8, 1.0], Level 2 is (0.5, 0.8], Level 3 is (0, 0.5], Level 4 is (-0.5, 0], Level 5 is (-0.8, 0.5], and Level 6 is [-1.0, -0.8]. The UE determines the reported channel correlation coefficient level by comparing the calculated channel correlation coefficient with the quantization threshold range. This method reduces signaling overhead, implicitly obtaining the threshold range parameters and reporting method through a single instruction.

[0371] The quantization category indication of the channel correlation coefficient can be further divided into a time-domain channel correlation coefficient quantization category indication and / or a frequency-domain channel correlation coefficient quantization category indication. In this case, the UE can have different quantization threshold ranges and reporting methods in the time and frequency domains to determine the CSI time-domain channel correlation coefficient level and / or the CSI frequency-domain channel correlation coefficient level, thereby determining different reporting accuracies in the time and frequency domains.

[0372] The quantization category indicator of the channel correlation coefficient can also be configured with only one, in which case the quantization category indicator of the channel correlation coefficient is applicable to both the time domain and the frequency domain, and has the same reporting accuracy in both the time domain and the frequency domain.

[0373] The CSI report corresponding to the method of reporting the channel stability of a given resource includes at least one of the following: CSI time-domain channel correlation coefficient level, and CSI frequency-domain channel correlation coefficient level. The UE measures the channel correlation coefficient based on a first reference resource in the configured reference resource set and other reference resources, and determines the CSI time-domain channel correlation coefficient level and / or the CSI frequency-domain channel correlation coefficient level by combining the quantization category indication of the channel correlation coefficient. For example, the first reference resource can be the first CSI resource in the resource set. Alternatively, the first reference resource can be specified by the base station in other ways, such as by giving a first reference resource index, etc. The method of determining the first reference resource is not limited here.

[0374] The method of reporting the channel stability of a given resource allows the first node to decide whether to adopt the design method of the DMRS time-domain and / or frequency-domain pattern proposed in this scheme, and to determine the corresponding parameters, such as time-domain and / or frequency-domain intervals. Furthermore, this method provides specific channel stability information between different resources, supporting the first node to make flexible decisions.

[0375] The CSI report configuration corresponding to the method of reporting resource indexes that meet channel stability requirements includes information related to at least one of the following: a resource set for CSI time-domain channel correlation coefficient measurement, a resource set for CSI frequency-domain channel correlation coefficient measurement, a quantization category indicator for the channel correlation coefficient, and a target quantization level (e.g., also referred to as a target channel stability level). The resource set for CSI time-domain channel correlation coefficient measurement, the resource set for CSI frequency-domain channel correlation coefficient measurement, and the quantization category indicator for the channel correlation coefficient have been previously described and will not be repeated here. When the CSI report configuration received by the UE from the first node includes the resource set for CSI time-domain channel correlation coefficient measurement, the UE is implicitly notified to report resource indexes that meet channel stability requirements in the time domain, thereby enabling the UE to perform time-domain channel correlation coefficient measurement. Similarly, when the CSI report configuration received by the UE from the first node includes the resource set for CSI frequency-domain channel correlation coefficient measurement, the UE is implicitly notified to report resource indexes that meet channel stability requirements in the frequency domain, thereby enabling the UE to perform frequency-domain channel correlation coefficient measurement.

[0376] The target channel stability level is defined as the channel stability requirement that the first node needs to meet when designing the DMRS time-domain and / or frequency-domain patterns proposed in this scheme. The target channel stability level triggers the UE to report the index of measurement resources that meet predefined channel stability criteria, where the predefined channel stability criteria are the target channel stability. For example, when the target channel stability is level one, the UE reports the index of reference resources in a given resource set whose channel correlation coefficient level, measured based on the first reference resource and other reference resources, meets level one. The quantization level of the measurement result (or measurement value, or channel estimation result, etc.) meeting the target channel stability level can mean that the quantization level of the measurement result (or measurement value, or channel estimation result, etc.) is equal to or better than the target channel stability level. Further, depending on the specific physical meaning of the measurement value and one or more specific quantization threshold ranges corresponding to one or more quantization threshold range levels, the quantization level of the measurement result being better than the target channel stability level can mean that the quantization level of the measurement result is greater than the target channel stability level, or the quantization level of the measurement result is less than the target channel stability level. For example, suppose there are three quantization threshold range levels, namely, level one, level two, and level three. The threshold range corresponding to level one is (0.8, 1.0]; the threshold range corresponding to level two is (0.5, 0.8]; and the threshold range corresponding to level three is [0, 0.5]. Furthermore, suppose that a larger measured value indicates a higher channel stability, and suppose that the target channel stability level is level two. Then, when the quantization level of the measured value is level two and / or level one, it can be regarded as meeting the target channel stability level.

[0377] The target channel stability level can be further divided into a time-domain target channel stability level and / or a frequency-domain target channel stability level. In this case, there can be different target channel stability levels for the time domain and the frequency domain.

[0378] There can also be only one target channel stability level. In this case, the target channel stability level is applicable to both the time domain and the frequency domain, that is, it has the same channel stability requirements in both the time domain and the frequency domain.

[0379] The CSI report corresponding to the method of reporting resource indexes (and / or any other identification information) that meet channel stability requirements includes at least one of the following: CSI resource indexes that meet channel stability criteria in the time domain, and CSI resource indexes that meet channel stability criteria in the frequency domain. The UE reporting the CSI resource indexes enables the base station to determine DMRS parameter settings, such as adjusting the DMRS interval in the time and / or frequency domains based on the reported CSI indexes that meet channel stability criteria.

[0380] The method of reporting resource indexes that meet channel stability requirements allows the first node to decide whether to adopt the design method of DMRS time-domain and / or frequency-domain patterns proposed in this scheme, and to determine the corresponding parameters, such as time-domain and / or frequency-domain intervals. Moreover, this method only needs to report resource information that meets the requirements, thus optimizing the reporting signaling overhead.

[0381] This disclosure provides various DMRS configuration methods to determine the parameters of the DMRS time-domain and / or frequency-domain pattern, making full use of RRC semi-static parameters, downlink control information (DCI) dynamic signaling, and MAC control element (MAC CE) to optimize resource utilization. Furthermore, the UE and the first node can jointly determine the DMRS configuration according to a predefined method, thereby avoiding the configuration signaling overhead of the first node.

[0382] The DMRS configuration method can be achieved by defining multiple sets of time-domain and / or frequency-domain parameter combinations for DMRS resources through parameter settings. The time-domain parameters of the DMRS include at least one of the following: the number of DMRS symbols, the symbol interval of the DMRS, and the time slot interval of the DMRS. The frequency-domain parameters of the DMRS include at least one of the following: the subcarrier interval of the DMRS, and the subcarrier offset of different DMRS symbols. By predefining various parameter combinations, or by the UE receiving parameter combination configuration from the first node via RRC, the range of selectable parameter combinations is determined. Then, the UE receives the selected parameter combinations from the first node via DCI or MAC CE, and finally determines the time-domain and / or frequency-domain parameters of the DMRS resources. This method is suitable for scenarios requiring flexible configuration and handover.

[0383] The DMRS configuration method can also be to use the DMRS time slot interval, combined with the activation or deactivation of DMRS symbols in the current time slot, to determine the time slot containing DMRS symbols: Time domain parameters, such as the DMRS time slot interval, and / or frequency domain parameters, such as the DMRS subcarrier interval and the subcarrier offset of different DMRS symbols, are determined through RRC signaling; then, DCI or MAC CE is used to dynamically determine whether the DMRS symbols in the current time slot are activated or deactivated, and / or the position of the DMRS symbols in the current time slot. In this method, the DMRS time slot interval determines how many time slots there is a DMRS symbol, and the dynamic activation or deactivation of DMRS symbols in the current time slot determines whether there is a DMRS symbol in the current time slot. This method is suitable for periodic services and can optimize resource utilization and latency.

[0384] The DMRS configuration can also be achieved by using a time slot bitmap to mark time slots containing DMRS symbols: Time-domain parameters, such as the time slot bitmap used to mark time slots containing DMRS symbols, and / or frequency-domain parameters, such as the subcarrier spacing of the DMRS and the subcarrier offset of different DMRS symbols, are determined via RRC signaling. Then, the position of the DMRS symbols within the time slots containing the DMRS symbols is determined via DCI or MAC CE. This method is suitable for scenarios requiring precise control of the DMRS symbol position.

[0385] The DMRS configuration method can also allow the UE and the first node to jointly determine the DMRS configuration parameters using a predefined approach. For example, when the measured channel stability meets a predefined channel stability criterion, the UE and the first node agree to use the corresponding DMRS configuration parameters. After reporting the channel stability measurement results, the UE does not need to wait for the first node to configure the DMRS parameters; it can determine the configuration parameters used by the first node when sending DMRS symbols based on the satisfaction of the predefined channel stability criterion. This method eliminates the configuration overhead of the base station.

[0386] It should be understood that methods 1800 and 1900, etc., according to embodiments of this disclosure may also include any methods or steps described in conjunction with the various examples, aspects, drawings, etc. of this disclosure.

[0387] Next, Figure 20 A schematic diagram of a node 2000 according to an embodiment of the present disclosure is shown.

[0388] like Figure 20 As shown, a node 2000 (e.g., any node as described herein, such as a first node) according to an embodiment of this disclosure may include a transceiver 2010 and a processor 2020. The transceiver 2010 may be configured to transmit and receive signals. The processor 2020 may be coupled to the transceiver 2010 and may be configured (e.g., to control the transceiver 2010) to perform methods performed by any node in a wireless communication system according to an embodiment of this disclosure. In this disclosure, a node may also be referred to as a node device.

[0389] Figure 21 A schematic diagram of a user equipment 2100 according to an embodiment of the present disclosure is shown.

[0390] like Figure 21As shown, a user equipment 2100 according to an embodiment of this disclosure may include a transceiver 2110 and a processor 2120. The transceiver 2110 may be configured to transmit and receive signals. The processor 2120 may be coupled to the transceiver 2110 and may be configured (e.g., to control the transceiver 2110) to perform methods executed by a user equipment (UE) in a wireless communication system according to an embodiment of this disclosure. In this disclosure, the processor may also be referred to as a controller.

[0391] Embodiments of this disclosure also provide a computer-readable medium having computer-readable instructions stored thereon, which, when executed by a processor, can be used to implement any method according to embodiments of this disclosure.

[0392] Various embodiments of this disclosure can be implemented as computer-readable code embodied on a computer-readable recording medium from a particular perspective. A computer-readable recording medium is any data storage device capable of storing data readable by a computer system. Examples of computer-readable recording media may include read-only memory (ROM), random access memory (RAM), optical disc read-only memory (CD-ROM), magnetic tape, floppy disk, optical data storage device, carrier wave (e.g., data transmission via the Internet), and the like. Computer-readable recording media can be distributed via computer systems connected via a network, and thus computer-readable code can be stored and executed in a distributed manner. Furthermore, the functional programs, code, and code segments used to implement the various embodiments of this disclosure can be readily interpreted by those skilled in the art applying the embodiments of this disclosure.

[0393] It will be understood that embodiments of this disclosure can be implemented in hardware, software, or a combination of hardware and software. Software can be stored as processor-executable program instructions or computer-readable code on a non-transitory computer-readable medium. Examples of non-transitory computer-readable recording media include magnetic storage media (e.g., ROM, floppy disk, hard disk, etc.) and optical recording media (e.g., CD-ROM, digital video disc (DVD), etc.). Non-transitory computer-readable recording media can also be distributed across a network-coupled computer system, such that the computer-readable code is stored and executed in a distributed manner. The medium can be read by a computer, stored in memory, and executed by a processor. Various embodiments can be implemented by a computer or a portable terminal including a controller and memory, and the memory can be an example of a non-transitory computer-readable recording medium suitable for storing a program(s) having instructions for implementing embodiments of this disclosure. This disclosure can be implemented by a program having code for specifically implementing the apparatus and methods described in the claims, the program being stored in a machine (or computer)-readable storage medium. The program can be carried electronically on any medium, such as communication signals transmitted via wired or wireless connections, and this disclosure suitably includes its equivalents.

[0394] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any person skilled in the art can make various changes or substitutions within the technical scope disclosed in this disclosure, and such changes or substitutions should all be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, comprising: Receive first information from the first node, the first information including third information related to the number of reference signals and / or fourth information related to the time-domain interval of the reference signals; as well as The Physical Downlink Shared Channel (PDSCH) transmission is received from the first node, wherein the PDSCH transmission is scheduled to be transmitted over multiple time slots. The reference signal is used for demodulation of the PDSCH transmission.

2. The method according to claim 1, wherein, The third information includes the number M of the reference signals, wherein M satisfies any one of the following: M＝1； 1 <M<N; M = N, Wherein, N is the number of time slots used for the PDSCH transmission.

3. The method according to claim 1, wherein, The fourth information includes the symbol interval of the reference signal, the symbol interval including at least one of the following: The number of symbols between two adjacent reference signals; The number of symbols used for PDSCH transmission between two adjacent reference signals.

4. The method according to claim 1 or 3, wherein, The first information also includes fifth information related to the pattern used to determine the symbol position of the reference signal, wherein the fifth information includes the first pattern, wherein... Determining the symbol position of the reference signal based on the first mode includes at least one of the following: The symbol positions of other reference signals in the reference signal, excluding the first reference signal, are determined based on the first symbol position and the first time-domain interval of the reference signal, wherein the first symbol position is the symbol position of the first reference signal in the reference signal in the first time slot used for the PDSCH transmission; or The symbol positions of the reference signals other than the last reference signal in the reference signal are determined based on the second symbol position and the first time-domain interval of the reference signal, wherein the second symbol position is the symbol position of the last reference signal in the reference signal in the last time slot used for the PDSCH transmission.

5. The method according to claim 4, wherein, The first time-domain interval is determined based on the first number of symbols and the number of reference signals. The first number of symbols includes at least one of the following: The number of symbols from the first symbol position to the last symbol in the last time slot used for the PDSCH transmission; The number of symbols from the first symbol position to the last symbol used for PDSCH transmission in the last time slot used for PDSCH transmission; The number of symbols from the first symbol position to the second symbol position; The number of symbols from the first symbol position to the previous symbol of the first reference signal in the first time slot of the PDSCH transmission used for the next scheduling; The sum of the number of symbols used for PDSCH transmission in the plurality of time slots used for PDSCH transmission.

6. The method according to claim 4, in, The first symbol position includes one or more of the following: The first symbol position in the first time slot used for the PDSCH transmission; The position of the third or fourth symbol in the first time slot; The position of the Cth symbol used for PDSCH transmission in the first time slot, where C is an integer greater than 1; and The second symbol position includes one or more of the following: The first symbol position in the last time slot used for the PDSCH transmission; The third or fourth symbol position in the last time slot; The position of the Eth symbol in the last time slot used for the PDSCH transmission, where E is an integer greater than 1.

7. The method according to claim 4, wherein, In the event that the symbol position of the first reference signal in the reference signal conflicts with other channels or signals, determining the symbol position of the reference signal based on the first mode further includes at least one of the following: The symbol position for PDSCH transmission that is adjacent to the symbol position of the first reference signal is determined as the symbol position of the first reference signal; The symbol position of the PDSCH transmission adjacent to the symbol position of the first reference signal is determined as the symbol position of the first reference signal. A second time-domain interval is determined based on the symbol position of the previous reference signal of the first reference signal and the determined symbol position. The symbol position of the reference signal after the first reference signal is determined based on the second time-domain interval. The symbol positions of the first reference signal and subsequent reference signals are determined based on the symbol position of the previous reference signal of the first reference signal and the third time-domain interval, wherein the third time-domain interval is included in the fourth information or determined based on the first time-domain interval.

8. The method according to claim 1, further comprising: Measurements are performed on the channel used to transmit the PDSCH. as well as The measurement result of the measurement is sent to the first node, wherein the first information is determined based on the measurement result.

9. The method according to claim 8, further comprising: Configure the receiving of Channel State Information (CSI) reports related to the measurement results from the first node. The CSI report configuration includes indication information related to the quantification of the measurement results. The indication information includes information related to at least one of the following: one or more quantization levels for quantizing the measurement result, one or more threshold ranges corresponding to the one or more quantization levels, the number of the one or more quantization levels, and the quantization method of the measurement result.

10. The method according to claim 8, wherein, The measurement results include time-domain measurement results obtained based on the Channel State Information Reference Signal (CSI-RS) received from the first node for time-domain measurement. The time-domain measurement results are determined based on the correlation between the channel estimation results of CSI-RS in the first time unit and the channel estimation results of CSI-RS in the second time unit.

11. The method according to claim 10, wherein, The first time unit and the second time unit are two different time units among all the time units occupied by the CSI-RS.

12. The method according to claim 8, wherein, The measurement results include frequency domain measurement results obtained based on the Channel State Information Reference Signal (CSI-RS) received from the first node for frequency domain measurement. The frequency domain measurement results are determined based on the correlation between the channel estimation results of CSI-RS on the first frequency domain unit and the channel estimation results of CSI-RS on the second frequency domain unit.

13. The method according to claim 12, wherein, The first frequency domain unit and the second frequency domain unit are two different frequency domain units among all the frequency domain units occupied by the CSI-RS.

14. The method according to claim 9, wherein, The CSI report configuration also includes a target quantification level. The measurement results include identification information of resources whose quantification level of the measured value meets the target quantification level.

15. A method performed by a first node in a wireless communication system, comprising: Send first information to the user equipment (UE), the first information including third information related to the number of reference signals and / or fourth information related to the time-domain interval of the reference signals; as well as The Physical Downlink Shared Channel (PDSCH) transmission is sent to the UE, wherein the PDSCH transmission is scheduled to be transmitted over multiple time slots. The reference signal is used for demodulation of the PDSCH transmission.

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