Method, terminal device, and network device

Abstract

Embodiments of the present disclosure relate to communications. According to embodiments of the present disclosure, a terminal device receives at least one setting of a codebook from a network device. The at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group. The terminal device transmits to the network device the number of layers and at least one codebook indicator based on the at least one setting of the codebook. The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. At least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of telecommunications, and more particularly, to methods, apparatuses, and computer-readable media for communication.

Background Art

[0002] To improve communication performance, several techniques have been proposed. For example, MIMO (Multi-Input-Multi-Output) has been proposed. MIMO includes a function that facilitates the utilization of a large number of antenna elements at a base station for both frequency bands below 6 GHz and above 6 GHz. In this situation, multiple antennas of a transmitter and / or a receiver can be used to obtain array gain and diversity gain rather than capacity gain. In this case, the same symbol weighted by a complex number multiple is transmitted from each transmitting antenna, and thus the input covariance matrix has a unit rank. This scheme is called beamforming. When there are multiple antennas at the receiver, in single-layer beamforming, the signal power cannot be maximized simultaneously at each receiving antenna. Therefore, precoding is used in multi-layer beamforming to maximize the throughput of a multi-antenna system. Precoding is a common beamforming scheme for supporting multi-layer transmission in an MIMO system. When precoding is used, multiple streams are transmitted from the transmitting antennas with appropriate individual weighting for each antenna so that the throughput is maximized at the output of the receiver.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Generally, exemplary embodiments of the present disclosure provide a solution for communication.

Means for Solving the Problems

[0004] In a first aspect, a communication method is provided. The method includes, at a terminal device, receiving at least one setting of a codebook from a network device, where the at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group, and transmitting, based on the at least one setting of the codebook, to the network device, the number of layers and at least one codebook indicator. The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. At least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups.

[0005] In a second aspect, a communication method is provided. The method includes, at a network device, transmitting at least one setting of a codebook to a terminal device, where the at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group, and receiving, based on the at least one setting of the codebook, from the terminal device, the number of layers and at least one codebook indicator. The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. At least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups.

[0006] In a third aspect, a terminal device is provided. The terminal device includes a processor unit and a memory coupled to the processor unit and storing instructions. When the instructions are executed by the processor unit, the terminal device is caused to perform an operation. The operation includes receiving at least one setting of a codebook, where at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group, and transmitting to a network device, based on at least one setting of the codebook, the number of layers and at least one codebook indicator. The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. At least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups.

[0007] In a fourth aspect, a source network device is provided. The source network device includes a processor unit and a memory coupled to the processor unit and storing instructions. When the instructions are executed by the processor unit, the source network device is caused to perform an operation. The operation includes transmitting at least one setting of a codebook, where at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group, and receiving from a terminal device, based on at least one setting of the codebook, the number of layers and at least one codebook indicator. The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. At least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups.

[0008] In a fifth aspect, a computer-readable medium storing instructions is provided. When the instructions are executed on at least one processor, the at least one processor is caused to execute a method according to any one of the first, second, or third aspects.

[0009] Other features of the present disclosure should be readily understood through the following description.

Brief Description of the Drawings

[0010] By describing some exemplary embodiments of the present disclosure in more detail in the accompanying drawings, the above and other objects, features, and advantages of the present disclosure should become more apparent.

[0011]

Figure 1

[0012]

Figure 2

[0013]

Figure 3

[0014]

Figure 4

[0015]

Figure 5

[0016] Throughout all the drawings, the same or similar reference numerals represent the same or similar elements.

Modes for Carrying Out the Invention

[0017] The principles of the present disclosure will be described with reference to some exemplary embodiments. These embodiments are described for illustrative purposes only and are helpful for those skilled in the art to understand and implement the present disclosure, and it should be understood that they do not imply any limitation to the scope of the present disclosure. The present disclosure described herein can be implemented in various ways other than those described below.

[0018] In the following description and claims, unless otherwise defined, all technical and scientific terms used have the same meaning as commonly understood by one of ordinary skill in the technical field to which this disclosure belongs.

[0019] As used herein, the term "network device" refers to a device capable of providing or hosting a cell or coverage with which a terminal device can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), NodeB for New Radio Access (gNB), Remote Radio Unit (RRU), Radio Head (RH), Remote Radio Head (RRH), low-power nodes such as femto nodes and pico nodes, satellite network devices, aircraft network devices, etc. Hereinafter, for the purpose of discussion, some exemplary embodiments will be described with reference to eNB as an example of a network device.

[0020] In this specification, the term "terminal device" refers to any device having a wireless or wired communication function. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, vehicle-mounted devices for V2X communication (where X means pedestrian, vehicle, or infrastructure / network), imaging devices such as digital cameras, game devices, music storage / playback devices, Internet devices enabling wireless / wired Internet access and browsing, etc., but are not limited thereto. In the following description, the terms "terminal device", "communication device", "terminal", "user device", and "UE" may be used interchangeably.

[0021] In one embodiment, the terminal device may be connected to a first network device and a second network device. One of the first network device and the second network device may be a master node and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device and the second network device may be a second RAT device. In one embodiment, the first RAT device is an eNB and the second RAT device is a gNB. Information related to different RATs may be transmitted from at least one of the first network device and the second network device to the terminal device. In one embodiment, first information may be transmitted from the first network device to the terminal device, and second information may be directly transmitted from the second network device to the terminal device or transmitted via the first network device. In one embodiment, information related to the settings of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information related to the re - settings of the terminal device set by the second network device may be directly transmitted from the second network device to the terminal device or transmitted via the first network device.

[0022] The communications discussed in this specification may conform to any suitable standard, including but not limited to new radio (NR), Long Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), cdma2000, and Global System for Mobile Communications (GSM). Further, the communications may be performed according to any generation of communication protocol known currently or developed in the future. Examples of communication protocols include, but are not limited to, the communication protocols of the first generation (1G), second generation (2G), 2.5G, 2.85G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G), and sixth generation (6G). The techniques described in this specification may be used not only for the above wireless networks and wireless technologies but also for other wireless networks and wireless technologies.

[0023] As used herein, the term "circuit" may mean a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of an analog hardware circuit and / or a digital hardware circuit and software / firmware. As a further example, a circuit may be any portion of a hardware processor with software, such as a digital signal processor, software, and memory that cooperate to perform various functions in a device such as a terminal device or a network device. As yet another example, a circuit may be a hardware circuit and / or a processor, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation but may not have software when not required for operation. As used herein, the term "circuit" encompasses mere hardware circuits or processors, or portions of hardware circuits or processors, and implementations of their (or their) attendant software and / or firmware.

[0024] As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. The term "including" and variations thereof are to be construed as an open-ended term meaning "including but not limited to". The term "based on" is to be construed as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The terms "first", "second", etc. may refer to different objects or the same object. There may be other definitions, explicit or implicit, in the following content.

[0025] In some instances, a value, procedure, or device is referred to as "optimal", "lowest", "highest", "minimum", "maximum", etc. Such descriptions are intended to indicate that among the multiple functional alternatives available, such a selection may be made, and it will be understood that such a selection need not be better, smaller, higher, or more preferred than other selections.

[0026] In the following, the terms "transmission opportunity", "reception opportunity", "repetition", "transmission", "reception", "PDSCH transmission opportunity", "PDSCH repetition", "PUSCH transmission opportunity", "PUSCH repetition", "PUCCH opportunity", "PUCCH repetition", "repetitive transmission", "repetitive reception", "PDSCH transmission", "PDSCH reception", "PUSCH transmission", "PUSCH reception", "PUCCH transmission", "PUCCH reception", "RS transmission", "RS reception", "communication", "transmission", and "reception" can be used interchangeably. The terms "TCI state", "QCL parameter set", "QCL parameter", "QCL assumption", and "QCL configuration" can be used interchangeably. The terms "TCI field", "TCI state field", and "transmission configuration indication" can be used interchangeably. The terms "transmission opportunity", "transmission", "repetition", "reception", "reception opportunity", "monitoring opportunity", "PDCCH monitoring opportunity", "PDCCH transmission opportunity", "PDCCH transmission", "PDCCH candidate", "PDCCH reception opportunity", "PDCCH reception", "search space", "CORESET", "multi-chance", and "PDCCH repetition" can be used interchangeably. In the following, the terms "PDCCH repetition", "repetitive PDCCH", "repetitive PDCCH signal", "PDCCH candidates configured for the same scheduling", "PDCCH", "PDCCH candidate", and "linked PDCCH candidates" can be used interchangeably. The terms "DCI" and "DCI format" can be used interchangeably. In some embodiments, the embodiments of the present disclosure can be applied to the scheduling of PDSCH and PUSCH. In the following, PDSCH scheduling will be described as an example. For example, the embodiments of the present disclosure can be applied to PUSCH by replacing "transmission" with "reception" and / or "reception" with "transmission". The terms "PDSCH" and "PUSCH" can be used interchangeably. The terms "transmission" and "reception" can be used interchangeably.The terms "common beam", "common beam update / display / indication", "integrated TCI state", "integrated TCI state update / display / indication", "beam indication", "TCI state indication", "TCI_state_r17", "tci_StateId_r17", "TCI_state_r17 indicating the integrated TCI state", "TCI state shared / applied for all or a subset of CORESET and UE-specific reception in PDSCH", "Rel-17 TCI state", "TCI state with tci_StateId_r17", "TCI state configured for TCI state update in the integrated TCI framework", "TCI state indicated by DCI for common beam update / display / indication", and "TCI state indicated by DCI and applied to all / subsets of CORESET and PDSCH" may be used interchangeably. The terms "subset of CORESET", "subset of TCI state", "subset of integrated TCI state", "subset of downlink (integrated) TCI state", and "subset of joint (integrated) TCI state" may be used interchangeably. The terms "subset of PUCCH", "subset of TCI state", "subset of integrated TCI state", "subset of uplink (integrated) TCI state", and "subset of joint (integrated) TCI state" may be used interchangeably. The terms "precoding matrix", "precoding", "beam", "beamforming", and "precoder" may be used interchangeably. The terms "size" and "number of PRBs" may be used interchangeably. The terms "vector", "beam", "bases", and "basis" can be used interchangeably. The terms "first vector", "first beam", "first base", and "first basis" can be used interchangeably. The terms "second vector", "second beam", "second base", and "second basis" can be used interchangeably. The terms "third vector", "third beam", "third base", and "third basis" can be used interchangeably. The terms "fourth vector", "fourth beam", "fourth base", and "fourth basis" can be used interchangeably.The terms "index", "indicator", "indication", "field", "bit field", and "bitmap" can be used interchangeably. The terms "physical resource block", "resource block", "PRB", and "RB" can be used interchangeably. The terms "bit size", "size of bit", "number of bits", "size of field", and "field size" can be used interchangeably.

[0027] As described above, precoding is a common beamforming method for supporting multi-layer transmission in a MIMO system. Precoding is a technique that utilizes transmit diversity by weighting information streams. That is, the transmitter sends the encoded information to the receiver so that prior knowledge of the channel can be obtained. When precoding is used, multiple streams are transmitted from the transmit antennas with appropriate unique weighting for each antenna so that the throughput is maximized at the output of the receiver. Hereinafter, the terms "precoding matrix" and "precoder" may be used interchangeably. Furthermore, uplink transmission with eight antenna ports may be able to support more than four layers.

[0028] FIG. 1 shows an exemplary communication network 100 in which embodiments of the present disclosure can be implemented. As shown in FIG. 1, network 100 includes a network device 110. For example, network device 110 is configured to have one, two, three, or four TRPs / panels 120-1 and / or 120-2 and / or 120-3 and / or 120-4 (collectively referred to as TRP 120 or individually referred to as TRP 120). Network 100 also includes a terminal device 130 that receives services from network device 110. The serving area of network device 110 is called cell 101 and / or cell 102. It should be understood that the numbers of network devices, terminal devices, and TRPs shown in FIG. 1 are for illustrative purposes only and do not imply any limitation to the present disclosure. Network 100 may include any suitable number of devices suitable for implementing embodiments of the present disclosure. Although not shown, it will be understood that one or more terminal devices may be located within cell 101 and / or cell 102 and receive services from network device 110.

[0029] In some scenarios, in network 100, it is possible to support carrier aggregation (CA) that aggregates two or more CCs to support a wider bandwidth. For example, in FIG. 1, network device 110 may provide a plurality of serving cells including one primary cell (Pcell or Pscell or Spcell) 101 corresponding to a primary CC and at least one secondary cell (Scell) 102 corresponding to at least one secondary CC to terminal device 130. It should be understood that the numbers of network devices, terminal devices, and / or serving cells are for illustrative purposes only and do not imply any limitation to the present disclosure. Network 100 may include any suitable number of network devices, terminal devices, and / or serving cells that conform to the implementation of the present disclosure.

[0030] In some other scenarios, the terminal device 130 may establish connections with two different network devices (not shown in FIG. 1), and thus can utilize the radio resources of the two network devices. The two network devices may be defined as a master network device and a secondary network device, respectively. The master network device may provide a serving cell group, also referred to as a "Master Cell Group (MCG)". The secondary network device may also provide a serving cell group, also referred to as a "Secondary Cell Group (SCG)". In the case of dual connectivity operation, depending on whether the terminal device 130 is associated with the MCG or the SCG respectively, the term "Special Cell (Spcell)" may refer to the Pcell of the MCG or the Primary Scell (Pscell) of the SCG. In cases other than dual connectivity operation, the term "SpCell" may also refer to the PCell.

[0031] In one embodiment, the terminal device 130 may be connected to a first network device and a second network device (not shown in FIG. 1). One of the first network device and the second network device may be a master node, and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device may be an eNB, and the second RAT device may be a gNB. Information related to different RATs may be transmitted from at least one of the first network device and the second network device to the terminal device 130. In one embodiment, the first information may be transmitted from the first network device to the terminal device 130, and the second information may be directly transmitted from the second network device to the terminal device 130 or transmitted via the first network device. In one embodiment, information related to the settings of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information related to the re - settings of the terminal device set by the second network device may be directly transmitted from the second network device to the terminal device or transmitted via the first network device. The information may be transmitted via any one of radio resource control (RRC) signaling, media access control (MAC) control element (CE), or downlink control information (DCI).

[0032] As used herein, the term "terminal device" refers to any device having a wireless or wired communication function. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, ultra-reliable low latency communication (URLLC) devices, vehicle-mounted devices for V2X communication (where X means pedestrian, vehicle, or infrastructure / network), imaging devices such as digital cameras, gaming devices, music storage / playback devices, Internet devices enabling wireless / wired Internet access and browsing, etc., but are not limited thereto. Hereinafter, for the purpose of discussion, some embodiments will be described with reference to a UE as an example of the terminal device 130.

[0033] As used in this specification, the term "network device" or "base station" (BS: Base Station) refers to a device capable of providing or hosting a cell or coverage with which a terminal device can communicate. Examples of network devices include Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), next-generation NodeB (gNB), transmission and reception point (TRP), remote radio unit (RRU), radio head (RH), remote radio head (RRH), femto node, low-power nodes such as pico nodes, etc., but are not limited thereto. The term "TRP" refers to an antenna array (having one or more antenna elements) available to a network device at a specific geographical location. For example, a network device may be coupled to a plurality of TRPs at different geographical locations to achieve better coverage. It should be understood that a TRP can also be referred to as a panel, and a panel also refers to an antenna array or antenna group (having one or more antenna elements).

[0034] In one embodiment, the terminal device 130 may be connected to a first network device and a second network device (not shown in FIG. 1). One of the first network device and the second network device may be a master node and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device may be an eNB, and the second RAT device may be a gNB. Information related to different RATs may be transmitted from at least one of the first network device and the second network device to the terminal device 130. In one embodiment, the first information may be transmitted from the first network device to the terminal device 130, and the second information may be directly transmitted from the second network device to the terminal device 130 or transmitted via the first network device. In one embodiment, information related to the settings of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information related to the re - settings of the terminal device set by the second network device may be directly transmitted from the second network device to the terminal device or transmitted via the first network device. The information may be transmitted via any of radio resource control (RRC) signaling, media access control (MAC) control element (CE), or downlink control information (DCI).

[0035] In some embodiments, the network device 110 may communicate with the terminal device 130 via the first TRP (e.g., TRP120-1) and / or the second TRP (e.g., TRP120-2) and / or the third TRP (e.g., TRP120-3) and / or the fourth TRP (e.g., TRP120-4). For example, the first TRP and / or the second TRP and / or the third TRP and / or the fourth TRP may be included in the same serving cell or different serving cells provided by the network device 110. Some embodiments of the present disclosure are described with reference to the first TRP and / or the second TRP and / or the third TRP and / or the fourth TRP within the same serving cell provided by the network device 110, but these embodiments are for illustrative purposes only and are helpful for those skilled in the art to understand and implement the present disclosure, and do not imply any limitation to the scope of the present disclosure. It should be understood that the present disclosure described in this specification can be implemented in various ways other than those described below.

[0036] In the communication network 100, the network device 110 can communicate data and control information to the terminal device 130, and the terminal device 130 can also communicate data and control information to the network device 110. The link from the network device 110 to the terminal device 130 is referred to as the downlink (DL), and the link from the terminal device 130 to the network device 110 is referred to as the uplink (UL).

[0037] Communication in the network 100 may conform to any suitable standard, including but not limited to Long Term Evolution (LTE), LTE Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). Further, the communication may be performed according to any generation of communication protocol known currently or developed in the future. Examples of communication protocols include, but are not limited to, the communication protocols of the first generation (1G), the second generation (2G), 2.5G, 2.75G, the third generation (3G), the fourth generation (4G), 4.5G, and the fifth generation (5G).

[0038] In some embodiments, the first TRP and / or the second TRP and / or the third TRP and / or the fourth TRP may be explicitly associated with different upper layer configuration IDs. For example, the upper layer configuration identity can be associated with a Control Resource Set (CORESET), a resource signal (RS), or a transmission configuration indication (TCI) state, which are used to distinguish transmissions between different TRP 120 and the terminal device 130.

[0039] As used herein, the term "slot" refers to a dynamic scheduling unit. One slot contains a predetermined number of symbols. For example, the number of symbols in one slot may be 12 or 14. The term "sub-slot" may refer to a plurality of symbols. For example, the number of symbols in one sub-slot may be 1, 2, 4, 7, 14. A sub-slot may contain fewer symbols than one slot. Herein, the slot may refer to a normal slot containing a predetermined number of symbols, or may refer to a sub-slot containing fewer symbols than the predetermined number of symbols.

[0040] Hereinafter, embodiments of the present disclosure will be described in detail. First, please refer to FIG. 2. FIG. 2 shows a signaling chart showing a process 200 between devices according to some exemplary embodiments of the present disclosure. For the purpose of discussion only, the process 200 will be described with reference to FIG. 1. The process 200 may involve the terminal device 130 and the network device 110 in FIG. 1.

[0041] In some embodiments, the network device 110 may transmit at least one setting to the terminal device 130 (2010). In some embodiments, the terminal device 130 may transmit at least one codebook indicator to the network device 110 (2020). In some embodiments, the at least one codebook indicator may be determined based on the at least one setting.

[0042] FIG. 3 shows a flowchart of an exemplary method 300 according to an embodiment of the present disclosure. The method 300 can be implemented by any suitable device. For the purpose of illustration only, the method 300 can be implemented by the terminal device 130 shown in FIG. 1.

[0043] In block 310, the terminal device 130 receives at least one setting of the codebook from the network device 110.

[0044] In block 320, the terminal device 130 transmits at least one codebook indicator. The at least one codebook indicator may be determined based on at least one setting of the codebook.

[0045] FIG. 4 shows a flowchart of an exemplary method 400 according to an embodiment of the present disclosure. The method 400 can be implemented by any suitable device. For illustrative purposes only, the method 400 can be implemented by the network device 110 shown in FIG. 1.

[0046] In block 410, the network device 110 transmits at least one setting of the codebook to the terminal device 130.

[0047] In block 420, the network device 110 receives at least one codebook indicator from the terminal device 130.

[0048] In some embodiments, the terminal device may receive at least one setting of the codebook. The at least one setting of the codebook may include a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group. In some embodiments, the terminal device may transmit, to the network device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, the at least one codebook indicator may include one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors. In some embodiments, at least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors may be based on the number of the second plurality of antenna port groups.

[0049] In some embodiments, the second plurality of antenna port groups may be the same as the first plurality of antenna port groups or the same as a subset of the antenna port groups selected from the first plurality of antenna port groups.

[0050] In some embodiments, at least one codebook indicator may include a field of a plurality of third amplitude coefficients corresponding to one layer having an index, a field of a plurality of third phase coefficients corresponding to one layer having the index, a bitmap indicating non-zero coefficients corresponding to one layer having the index, and at least one of an indicator of the strongest coefficient corresponding to one layer having the index. In some embodiments, the bitmap indicating non-zero coefficients may indicate which coefficients of the field of the plurality of third amplitude coefficients are non-zero or have been reported. In some embodiments, the bitmap indicating non-zero coefficients may indicate which coefficients of the field of the plurality of third phase coefficients are non-zero or have been reported. In some embodiments, the size of the bitmap indicating non-zero coefficients may be based on the number of the second plurality of antenna port groups.

[0051] In some embodiments, the size of the indicator of the strongest coefficient may be based on the number of the second plurality of antenna port groups.

[0052] In some embodiments, at least one codebook indicator may include a field of a plurality of third vectors corresponding to one layer having an index, and at least one of the number of the plurality of third vectors and the length of one third vector is based on the number of the second plurality of antenna port groups.

[0053] In some embodiments, the length of one third vector may be determined based on the first parameter of the codebook and the number of first sub-bands. In some embodiments, the value of the first parameter of the codebook may be determined based on the number of a second plurality of antenna port groups.

[0054] In some embodiments, the number of a plurality of third vectors may be determined based on the third parameter of the codebook, the number of second sub-bands, and the first parameter of the codebook. In some embodiments, the number of second sub-bands may be based on the first parameter of the codebook and the number of first sub-bands. In some embodiments, the second size of one second sub-band may be determined based on the first parameter of the codebook and the first size of one first sub-band.

[0055] In some embodiments, when the number of the second plurality of antenna port groups is 1, the value of the first parameter of the codebook may be the first value. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1, the value of the first parameter of the codebook may be the second value. In some embodiments, the second value may be greater than or equal to the first value.

[0056] In some embodiments, when the number of the second plurality of antenna port groups is 1, the number of a plurality of first vectors may be the third value. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1, the number of a plurality of first vectors may be the fourth value. In some embodiments, the fourth value may be greater than or equal to the third value.

[0057] In some embodiments, the number of a plurality of first vectors may be determined as the minimum value between the fourth value and the fifth value.

[0058] In some embodiments, the number of a plurality of first vectors may be determined as the maximum value between a third value and a fifth value. In some embodiments, the fifth value may be the product of a first parameter of the antenna port setting, a second parameter of the antenna port setting, and the number of a second plurality of antenna port groups. In some embodiments, the maximum number of non-zero coefficients corresponding to one layer with an index may be determined based on a third parameter of the codebook, the number of a plurality of first vectors, and the number of a plurality of third vectors corresponding to the first layer.

[0059] In some embodiments, the size of one or more indicators of a plurality of first vectors may be determined based on the fifth value, and the number of a plurality of first vectors, or the size of one or more indicators of a plurality of first vectors may be 0 based on at least one setting of the codebook.

[0060] In some embodiments, the number of a plurality of antenna ports within one antenna port group may be the product of a first parameter of the antenna port setting, a second parameter of the antenna port setting, and 2.

[0061] In some embodiments, the length of one first vector may be based on the product of the number of a plurality of antenna ports within one antenna port group and the number of a second plurality of antenna port groups divided by 2, or may be based on the fifth value.

[0062] In some embodiments, the number of a first plurality of antenna port groups may be at least one of 2, 3, and 4. In some embodiments, the number of a second plurality of antenna port groups may be less than or equal to the number of a first plurality of antenna port groups and may be 1 or more.

[0063] In some embodiments, the terminal device may receive a reference signal, and the number of antenna ports of the reference signal may be the product of the number of the first plurality of antenna port groups and the number of a plurality of antenna ports within one antenna port group. In some embodiments, at least one codebook indicator may be determined or measured based on the reference signal.

[0064] In some embodiments, the network device may transmit at least one setting of the codebook to the terminal device, and at least one setting of the codebook may include the first plurality of antenna port groups and a plurality of antenna ports within one antenna port group. In some embodiments, the network device may receive, from the terminal device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, at least one codebook indicator may include one or more indicators of the second plurality of antenna port groups and one or more indicators of the plurality of first vectors. In some embodiments, at least one of the length of one first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of first vectors may be based on the number of the second plurality of antenna port groups.

[0065] In some embodiments, the network device may transmit a reference signal, and the number of antenna ports of the reference signal may be the product of the number of the first plurality of antenna port groups and the number of a plurality of antenna ports within one antenna port group.

[0066] In some embodiments, the terminal device may receive at least one setting of the codebook, including one or more settings of a plurality of reference signals and one or more settings of a codebook corresponding to one of the plurality of reference signals. In some embodiments, the terminal device may transmit, to the network device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, the at least one codebook indicator may include an indication of a reference signal from a plurality of reference signals and one or more indicators of one of a first plurality of antenna ports. In some embodiments, at least one of the number of the first plurality of antenna ports and the size of one or more indicators of the first plurality of antenna ports may be based on one or more settings of the codebook corresponding to the indication of the reference signal. In some embodiments, the one or more settings of the codebook corresponding to the indication of the reference signal may include a first parameter of the antenna port setting and a second parameter of the antenna port setting.

[0067] In some embodiments, the length of one third vector may be determined based on a first parameter of the codebook and the number of first sub-bands, and the value of the first parameter of the codebook is determined based on one or more settings of the codebook corresponding to the indication of the reference signal.

[0068] In some embodiments, the number of a plurality of third vectors may be determined based on a third parameter of the codebook, the number of second sub-bands, and a first parameter of the codebook, where the number of second sub-bands may be based on a first parameter of the codebook and the number of first sub-bands, and the second size of one second sub-band may be determined based on a first parameter of the codebook and the first size of one first sub-band.

[0069] In some embodiments, when the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the first reference signal, the value of the first parameter of the codebook may be the first value. In some embodiments, when the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the second reference signal, the value of the first parameter of the codebook may be the second value.

[0070] In some embodiments, when the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the first reference signal, the number of the first plurality of antenna ports may be the third value.

[0071] In some embodiments, when the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the second reference signal, the number of the first plurality of antenna ports may be the fourth value.

[0072] In some embodiments, the number of the first plurality of antenna ports may be determined as the minimum value between the fourth value and the fifth value. In some embodiments, the number of the first plurality of antenna ports may be determined as the maximum value between the third value and the fifth value, and the fifth value may be the product of the first parameter of the antenna port setting multiplied by the second parameter of the antenna port setting.

[0073] In some embodiments, the size of one or more indicators of the first plurality of antenna ports may be determined based on the fifth value and the value of the number of the first plurality of antenna ports.

[0074] In some embodiments, the terminal device may receive the reference signal based on one or more settings of the codebook corresponding to the indication of the reference signal.

[0075] In some embodiments, the network device may transmit at least one setting of a codebook, including one or more settings of a plurality of reference signals and one or more settings of a codebook corresponding to one reference signal, to the terminal device. In some embodiments, the network device may receive, from the terminal device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, the at least one codebook indicator may include an indication of a reference signal and one or more indicators of one or more of a first plurality of antenna ports, where at least one of the number of the first plurality of antenna ports and the size of one or more of the one or more indicators of the first plurality of antenna ports is based on one or more settings of a codebook corresponding to the indication of the reference signal, where the one or more settings of the codebook corresponding to the indication of the reference signal include a first parameter of the antenna port setting and a second parameter of the antenna port setting.

[0076] In some embodiments, the network device may transmit a plurality of reference signals based on one or more settings of a codebook corresponding to one reference signal.

[0077] In some embodiments, the terminal device may receive at least one setting of a codebook. In some embodiments, the at least one setting of the codebook may include a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group. In some embodiments, the terminal device may transmit, to the network device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, the at least one codebook indicator may include one or more indicators of one or more of a plurality of second vectors and at least one of one or more indicators of a second plurality of antenna port groups, one or more indicators of a plurality of first amplitude coefficients, and one or more indicators of a plurality of first phase coefficients.

[0078] In some embodiments, the plurality of first vectors may be determined based on the plurality of second vectors and at least one of the plurality of first amplitude coefficients and the plurality of first phase coefficients. In some embodiments, at least one of the length of the first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of second vectors may be based on the number of the second plurality of antenna port groups and at least one of the plurality of first amplitude coefficients.

[0079] In some embodiments, the second plurality of antenna port groups may be the same as the first plurality of antenna port groups or the same as a subset of the antenna port groups selected from the first plurality of antenna port groups.

[0080] In some embodiments, at least one of the number of the plurality of first amplitude coefficients and the number of the plurality of first phase coefficients may be determined based on the number of the second plurality of antenna port groups. In some embodiments, the second plurality of antenna port groups may be determined based on the values of the plurality of first amplitude coefficients.

[0081] In some embodiments, at least one codebook indicator may include at least one of a field of a plurality of third amplitude coefficients corresponding to one layer having an index, a field of a plurality of third phase coefficients corresponding to one layer having the index, a bitmap indicating non-zero coefficients corresponding to one layer having the index, and an indicator of the strongest coefficient corresponding to one layer having the index.

[0082] In some embodiments, the bitmap indicating non-zero coefficients may indicate which coefficients in the field of a plurality of third amplitude coefficients are non-zero or reported, the bitmap may indicate which coefficients in the field of a plurality of third phase coefficients are non-zero or reported, and the size of the bitmap may be based on the number of a second plurality of antenna port groups and at least one of the plurality of first amplitude coefficients. In some embodiments, the size of the indicator of the strongest coefficient may be based on the number of a second plurality of antenna port groups and at least one of the plurality of first amplitude coefficients.

[0083] In some embodiments, at least one codebook indicator may include one or more indicators of a plurality of third vectors corresponding to one layer having an index, and at least one of the number of the plurality of third vectors and the length of one third vector may be based on the number of a second plurality of antenna port groups and at least one of the plurality of first amplitude coefficients. In some embodiments, the length of one third vector may be determined based on a first parameter of the codebook and the number of first sub-bands. In some embodiments, the value of the first parameter of the codebook may be determined based on the number of a second plurality of antenna port groups and at least one of the plurality of first amplitude coefficients. In some embodiments, the number of the plurality of third vectors may be determined based on a third parameter of the codebook, the number of second sub-bands, and a first parameter of the codebook. In some embodiments, the number of second sub-bands may be based on a first parameter of the codebook and the number of first sub-bands, and the second size of one second sub-band may be determined based on a first parameter of the codebook and the first size of one first sub-band.

[0084] In some embodiments, at least one codebook indicator may include one or more indicators of a plurality of fourth vectors, where the plurality of fourth vectors corresponds to one layer with an index or the plurality of fourth vectors may be the same for each layer of a plurality of layers.

[0085] In some embodiments, at least one of the number of the plurality of fourth vectors and the length of one fourth vector may be based on at least one of the number of a second plurality of antenna port groups and the plurality of first amplitude coefficients. In some embodiments, the length of one fourth vector may be determined based on a fourth parameter of a codebook and either the number of first subbands or the number of second subbands. In some embodiments, the value of the fourth parameter may be determined based on at least one of the number of a second plurality of antenna port groups and the plurality of first amplitude coefficients. In some embodiments, the number of the plurality of fourth vectors may be determined based on a sixth parameter of a codebook, the number of third subbands, and a fourth parameter of the codebook. In some embodiments, the number of third subbands may be based on a fourth parameter of a codebook and either the number of first subbands or the number of second subbands. In some embodiments, the third size of one third subband may be determined based on a fourth parameter of a codebook and either the first size of one first subband or the second size of one second subband.

[0086] In some embodiments, the plurality of fourth vectors may be the same as the plurality of third vectors. In some embodiments, the fourth parameter may be the same as the first parameter. In some embodiments, the sixth parameter may be the same as the third parameter.

[0087] In some embodiments, when the value of the first amplitude coefficient corresponding to an antenna port group is 0, that antenna port group may not be included in the second plurality of antenna port groups.

[0088] In some embodiments, when the number of the second plurality of antenna port groups is 1, the value of the first parameter of the codebook may be the first value. In some embodiments, when the number of the second plurality of antenna port groups is 1, the value of the third parameter of the codebook may be the sixth value. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1, the value of the first parameter of the codebook may be the second value. In some embodiments, the second value may be greater than or equal to the first value, or greater than the first value. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1, the value of the third parameter of the codebook may be the seventh value. In some embodiments, the seventh value may be greater than the sixth value, or greater than or equal to the sixth value.

[0089] In some embodiments, when the number of the second plurality of antenna port groups is 1, the number of the plurality of second vectors may be an eighth value. In some embodiments, when the number of the second plurality of antenna port groups is greater than 1, the second number of the plurality of second vectors may be a ninth value. In some embodiments, the ninth value may be greater than or equal to the eighth value, or may be greater than the eighth value. In some embodiments, the number of the plurality of second vectors may be determined as the minimum value between the ninth value and a tenth value. In some embodiments, the number of the plurality of second vectors may be determined as the maximum value between the eighth value and the tenth value. In some embodiments, the tenth value may be the product of a first parameter of the antenna port setting, a second parameter of the antenna port setting, and the number of the second plurality of antenna port groups. In some embodiments, the maximum number of non-zero coefficients corresponding to one layer having an index may be determined based on a third parameter of the codebook, the number of the plurality of second vectors, and the number of the plurality of third vectors corresponding to the first layer.

[0090] In some embodiments, the number of the plurality of second vectors may be determined based on the number of the second vectors corresponding to one antenna port group and the number of the second plurality of antenna port groups, where the number of the second vectors corresponding to one antenna port group may be based on at least one setting of the codebook.

[0091] In some embodiments, the number of the plurality of first vectors may be based on or the same as the number of the second vectors corresponding to one antenna port group.

[0092] In some embodiments, one of the one or more indicators of the plurality of second vectors may indicate the number of the second vectors corresponding to one antenna port group, or a set of second vectors for one first vector. In some embodiments, the number of a set of second vectors may be based on the number of the second plurality of antenna port groups.

[0093] In some embodiments, the size of one or more indicators of a plurality of second vectors, or the number of one or more indicators of a plurality of second vectors, may be determined based on a tenth value, the number of second vectors corresponding to one antenna port group, and any one of the number of a second plurality of antenna port groups or a plurality of first amplitude coefficients.

[0094] In some embodiments, the number of antenna ports within one antenna port group may be the product of a first parameter of the antenna port setting, a second parameter of the antenna port setting, and 2.

[0095] In some embodiments, the length of one first vector may be based on the product of the number of antenna ports within one antenna port group and the number of a second plurality of antenna port groups divided by 2, or may be based on a tenth value.

[0096] In some embodiments, the number of a first plurality of antenna port groups may be at least one of 2, 3, and 4. In some embodiments, the number of a second plurality of antenna port groups may be less than or equal to the number of a first plurality of antenna port groups and may be 1 or more.

[0097] In some embodiments, the terminal device may receive a reference signal, and the number of antenna ports of the reference signal may be the product of the number of a first plurality of antenna port groups and the number of antenna ports within one antenna port group.

[0098] In some embodiments, the network device may transmit at least one setting of the codebook to the terminal device, and at least one setting of the codebook may include a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group. In some embodiments, the network device may receive, from the terminal device, the number of layers and at least one codebook indicator based on at least one setting of the codebook. In some embodiments, the at least one codebook indicator may include at least one of one or more indicators of a plurality of second vectors, one or more indicators of a second plurality of antenna port groups, one or more indicators of a plurality of first amplitude coefficients, and one or more indicators of a plurality of first phase coefficients. In some embodiments, the plurality of first vectors may be determined based on the plurality of second vectors and at least one of the plurality of first amplitude coefficients and the plurality of first phase coefficients, where at least one of the length of the first vector, the number of the plurality of first vectors, and the size of one or more indicators of the plurality of second vectors is based on at least one of the number of the second plurality of antenna port groups and the plurality of first amplitude coefficients.

[0099] In some embodiments, the network device may transmit a reference signal, and the number of antenna ports of the reference signal may be the product of the number of the first plurality of antenna port groups and the number of antenna ports within one antenna port group.

[0100]

Number

[0101]

Number

[0102]

Number

[0103] In some embodiments, the start position of the BWP and the number of PRBs of the BWP may be set to one upper layer parameter.

[0104] In some embodiments, the first sub-band may correspond to a sub-band of a Channel Quality Indicator (CQI), a CQI sub-band, or a CSI sub-band.

[0105]

Number

[0106] In some embodiments, at least one parameter of the antenna port may include at least one of a first plurality of antenna port groups, the number of the first plurality of antenna port groups, the number of antenna ports in one antenna port group, one or more subsets of antenna ports in one antenna port group, the number of one or more subsets of antenna ports in one antenna port group, the number of antenna ports in one subset of antenna ports, a plurality of antenna ports in one subset of antenna ports, a plurality of antenna ports in one antenna port group, a first parameter of the antenna port setting, and a second parameter of the antenna port setting. For example, one antenna port group may correspond to a TRP or the antenna port of a TRP. In some embodiments, one antenna port group may correspond to one CSI-RS resource. In some embodiments, at least one setting of the codebook may include the first plurality of antenna port groups.

[0107]

Number

[0108] In some embodiments, at least one setting of the codebook may include a plurality of antenna ports within one antenna port group. In some embodiments, the number of antenna ports within one antenna port group (e.g., represented as P) may be at least one of {1, 2, 4, 6, 8, 12, 16}. In some embodiments, the number of antenna ports within each antenna port group may be the same. For example, P may be a positive integer. For example, P may be at least one of {1, 2, 4, 6, 8, 12, 16}.

[0109]

Number

[0110] In some embodiments, the terminal device may receive a reference signal based on the number of antenna ports for the reference signal.

[0111]

Number

[0112]

Number

[0113] In some embodiments, the value of the first parameter of the antenna port setting may be represented as N 1 For example, N 1 may be a positive integer. For example, N 1 may be at least one of {2, 3, 4, 6, 8, 12, 16}. In some embodiments, the value of the second parameter of the antenna port setting may be represented as N 2 For example, N 2 may be a positive integer. For example, N 2may be at least one of {1, 2, 3, 4}. In some embodiments, the first parameter of the antenna port setting and the second parameter of the antenna port setting may be set to one upper layer parameter.

[0114]

Number

[0115]

Number

[0116]

Number

[0117] In some embodiments, the parameter "O" 1 may exist, and "O" 1 may represent the first discrete Fourier transform (DFT) oversampling in the first dimension. For example, "O" 1」 may be at least one of {1, 2, 4}. In another example, "O" 1」 may be 2 or 4. In some embodiments, the parameter "O" 2 may exist, and "O" 2 may represent the second DFT oversampling in the second dimension. For example, "O" 2 may be at least one of {1, 2, 4}. In another example, "O" 2 may be 2 or 4.

[0118]

Number

[0119]

Number

Table 1

[0120] In some embodiments, N / A may indicate that there is no value or setting for the parameter.

[0121]

Number

[0122]

Number

Table 2

[0123]

Number

Table 3

[0124]

Number

Table 4

[0125]

Number

Table 5

[0126]

Number

Table 6

[0127]

Number

[0128]

Number

[0129] In some embodiments, at least one codebook indicator may include at least one of one or more indicators (or fields) of a first plurality of antenna port groups, one or more indicators (or fields) of a second plurality of antenna port groups, one or more indicators (or fields) of a plurality of first vectors, one or more indicators (or one or more fields) of a plurality of second vectors, one or more indicators (or fields) of a first plurality of rotations of a plurality of first vectors, one or more indicators (or one or more fields) of a second plurality of rotations of a plurality of second vectors, one or more indicators (or fields) of a plurality of third vectors, one or more indicators (or fields) of a plurality of fourth vectors, an indicator (or field) of the strongest coefficient, one or more indicators (or one or more indices or one or more fields) of a first antenna port group, one or more indicators (or fields) of a plurality of first amplitude coefficients, one or more indicators (or fields) of a plurality of first phase coefficients, one or more indicators (or fields) of a plurality of second amplitude coefficients, one or more indicators (or fields) of a plurality of second phase coefficients, one or more indicators (or fields) of a plurality of third amplitude coefficients, one or more indicators (or fields) of a plurality of third phase coefficients, a first number of non-zero coefficients, and one or more indicators (or one or more bitmaps) indicating non-zero coefficients.

[0130] In some embodiments, one or more indicators (or one or more bitmaps) indicating non-zero coefficients indicate the index of the third amplitude coefficient and / or indicate the index of the third phase coefficient, and the value of the third amplitude coefficient corresponding to the index and / or the value of the third phase coefficient corresponding to the index may be non-zero. In some embodiments, one or more indicators (or one or more bitmaps) indicating non-zero coefficients may indicate which coefficients are non-zero or reported in one or more indications or in a field of a plurality of third amplitude coefficients. In some embodiments, one or more indicators (or one or more bitmaps) indicating non-zero coefficients may indicate which coefficients are non-zero or reported in one or more indications or in a field of a plurality of third phase coefficients.

[0131] In some embodiments, one or more of at least one codebook indicator may be the same or applied to each of a plurality of layers. For example, it is layer-common. In some embodiments, one or more of at least one codebook indicator may correspond to one layer having an index. For example, it is layer-specific.

[0132] In some embodiments, one or more indicators (or fields) of a second plurality of antenna port groups may be the same or applied to each of a plurality of layers. For example, it is layer-common. In some embodiments, one or more indicators (or fields) of a second plurality of antenna port groups may correspond to one layer having an index. For example, it is layer-specific.

[0133] In some embodiments, one or more indicators (or fields) of the plurality of first vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer - common. In some embodiments, one or more indicators (or fields) of the plurality of first vectors may correspond to one layer with an index. For example, they are layer - specific.

[0134] In some embodiments, one or more indicators (or fields) of the plurality of second vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer - common. In some embodiments, one or more indicators (or fields) of the plurality of second vectors may correspond to one layer with an index. For example, they are layer - specific.

[0135] In some embodiments, one or more indicators (or fields) of the first plurality of rotations of the plurality of first vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer - common. In some embodiments, one or more indicators (or fields) of the first plurality of rotations of the plurality of first vectors may correspond to one layer with an index. For example, they are layer - specific.

[0136] In some embodiments, one or more indicators (or fields) of the second plurality of rotations of the plurality of second vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer - common. In some embodiments, one or more indicators (or fields) of the second plurality of rotations of the plurality of second vectors may correspond to one layer with an index. For example, they are layer - specific.

[0137] In some embodiments, one or more indicators (or fields) of the plurality of third vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of third vectors may correspond to one layer with an index. For example, they are layer-specific.

[0138] In some embodiments, one or more indicators (or fields) of the plurality of fourth vectors may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of fourth vectors may correspond to one layer with an index. For example, they are layer-specific.

[0139] In some embodiments, the indicator (or field) of the strongest coefficient may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, the indicator (or field) of the strongest coefficient may correspond to one layer with an index. For example, they are layer-specific.

[0140] In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0141] In some embodiments, one or more indicators (or fields) of the plurality of first phase coefficients may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of first phase coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0142] In some embodiments, one or more indicators (or fields) of the plurality of second amplitude coefficients may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of second amplitude coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0143] In some embodiments, one or more indicators (or fields) of the plurality of second phase coefficients may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) of the plurality of second phase coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0144] In some embodiments, one or more indicators (or fields) of the plurality of third amplitude coefficients may correspond to one layer with an index. For example, they are layer-specific. In some embodiments, one or more indicators (or fields) of the plurality of third phase coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0145] In some embodiments, one or more indicators (or fields) indicating non-zero coefficients may be the same or may be applied to each of the plurality of layers. For example, they are layer-common. In some embodiments, one or more indicators (or fields) indicating non-zero coefficients may correspond to one layer with an index. For example, they are layer-specific.

[0146] In some embodiments, the first number of non-zero coefficients may be the same or applied to each of a plurality of layers. For example, it is layer-common. In some embodiments, the first number of non-zero coefficients may correspond to one layer with an index. For example, it is layer-specific.

[0147] In some embodiments, the number of a plurality of first vectors, the second parameter of the codebook, and the third parameter of the codebook may be set or indicated by one upper-layer parameter. In some embodiments, the fifth parameter of the codebook and the sixth parameter of the codebook may be set or indicated by one upper-layer parameter.

[0148] In some embodiments, the first parameter of the codebook may be the same as the fourth parameter of the codebook. In some embodiments, the second parameter of the codebook may be the same as the fifth parameter of the codebook. In some embodiments, the third parameter of the codebook may be the same as the sixth parameter of the codebook.

[0149]

Number

[0150]

Number

[0151]

Number

[0152]

Number

[0153]

Number

[0154] In some embodiments, the second sub - band may correspond to a sub - band of a precoding matrix indicator (PMI) or a PMI sub - band.

[0155]

Number

[0156]

Number

[0157]

Number

[0158]

Number

[0159]

Number

[0160]

Number

[0161]

Number

[0162] In some embodiments, nchoosek may be a function that selects k values from n values. In some embodiments, nchoosek(a, b)=a! / (b!*(a - b)!). In some embodiments, "!" may be a factorial. In some embodiments, a!=1*2*…*(a - 1)*a.

[0163] In some embodiments, at least one codebook indicator may be included in the PMI. In some embodiments, the PMI may include a first part of the PMI and a second part of the PMI. For example, the size of the second part of the PMI may be based on the first part of the PMI. In some embodiments, the PMI may include a first part of the PMI, a second part of the PMI, and a third part of the PMI. For example, the size of the second part of the PMI may be based on the first part of the PMI. As another example, the size of the third part of the PMI may be based on at least one of the first part of the PMI and the second part of the PMI.

[0164] In some embodiments, one or more indicators (or fields) of the second plurality of antenna port groups may be included in the PMI, or the first part of the PMI.

[0165] In some embodiments, the number of one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be the same as the number of layers. In some embodiments, the number of one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be 1. For example, it is common for each layer of a plurality of layers. In some embodiments, one or more indicators (or one or more indexes, or one or more fields) of the first antenna port group may be the same for each layer of the plurality of layers.

[0166]

Number

[0167]

Number

[0168] In some embodiments, one or more indicators (or fields) of the second plurality of antenna port groups may indicate the order of the second plurality of antenna port groups. In some embodiments, the first of the second plurality of antenna port groups shown may be the same as the index (or indicator) of the first antenna port group.

[0169]

Number

[0170]

Number

[0171]

Number

[0172]

Number

[0173] In some embodiments, the number of the plurality of first vectors may be based on the number of the plurality of second vectors and either one of the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0174] In some embodiments, the length of one first vector may be based on the number of antenna ports in one antenna port group and at least one of the number of the first plurality of antenna port groups, the number of the second plurality of antenna port groups, and the values of the plurality of first amplitude coefficients.

[0175] In some embodiments, one first vector may be determined based on the plurality of second vectors and at least one of the plurality of first amplitude coefficients and the plurality of first phase coefficients.

[0176] In some embodiments, the number of the plurality of first vectors may be the same as the number of the plurality of second vectors.

[0177] In some embodiments, the number of the plurality of first vectors may be based on the number of the first plurality of antenna port groups and the number of the plurality of second vectors. In some embodiments, the number of the plurality of first vectors may be based on the number of the second plurality of antenna port groups and the number of the plurality of second vectors.

[0178] In some embodiments, the number of the indicators (or fields) of the strongest coefficients may be based on the number of layers, and each of the indicators (or fields) of the strongest coefficients corresponds to a layer having an index.

[0179] In some embodiments, the indicator (or field) of the strongest coefficient corresponding to the layer having an index, or the bit size (or bit width) of the indicator (or field) of the strongest coefficient corresponding to the layer having an index, may be based on at least one of a value of 2, a first number of non-zero coefficients corresponding to one layer having an index, the number of the first plurality of first vectors, the number of the second plurality of antenna port groups and the number of the plurality of second vectors, and an index (or indicator) of the first antenna port group. In some embodiments, the bit size of the index or indicator of the first antenna port group may be based on the number of the first plurality of antenna port groups and the number of the plurality of second vectors.

[0180] In some embodiments, the bit size of the indicator (or field) of the strongest coefficient corresponding to the layer having an index may be based on at least one of a first number of non-zero coefficients corresponding to one layer having an index, the number of the first plurality of first vectors multiplied by 2, the number of the second plurality of antenna port groups multiplied by 2 and then multiplied by the number of the second plurality of second vectors, and the number of the plurality of second vectors multiplied by 2.

[0181] In some embodiments, the indicator (or field) of the strongest coefficient corresponding to the layer with an index may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0182] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on one less than the number of the first plurality of antenna port groups or one less than the number of the second plurality of antenna port groups.

[0183]

Number

[0184] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on the number of the plurality of fourth vectors and either one of the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0185]

Number

[0186] In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0187] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on one less than the number of the first plurality of antenna port groups or one less than the number of the second plurality of antenna port groups.

[0188]

Number

[0189] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the plurality of fourth vectors and either one of the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0190]

Number

[0191] In some embodiments, one or more indicators (or fields) of the plurality of first phase coefficients may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0192] In some embodiments, the indicator of the first amplitude coefficient of the first antenna port group may be fixed. For example, the indicator of the first amplitude coefficient of the first antenna port group may be fixed to 0 or 7 or 15 or 3. In some embodiments, the value of the first amplitude coefficient of the first antenna port group may be fixed. In some embodiments, the value of the first amplitude coefficient of the first antenna port group may be fixed to 1.

[0193]

Number

[0194] In some embodiments, the number of one or more indicators (or fields) of the plurality of second amplitude coefficients may be based on at least one of the number of the second plurality of antenna port groups and the value of the first amplitude coefficient of the antenna port group.

[0195] In some embodiments, one or more indicators (or fields) of the plurality of second amplitude coefficients may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0196] In some embodiments, the value of one second amplitude coefficient may be greater than 0 or may not be 0.

[0197] In some embodiments, one or more indicators (or one or more bitmaps) indicating non-zero coefficients may indicate the index of the third amplitude coefficient and / or the index of the third phase coefficient. In some embodiments, each bit or code point of the indicator (or bitmap) may indicate whether the third amplitude coefficient and / or the third phase coefficient is reported (or whether the value is 0). Here, the third amplitude coefficient and / or the third phase coefficient corresponds to a layer with an index, corresponds to a first vector (or first beam) with an index, and corresponds to a third vector with an index. In some embodiments, the value of each bit is either 0 or 1. For example, 0 may indicate that the third amplitude coefficient and / or the third phase coefficient corresponding to the layer with an index, corresponding to the first vector (or first beam) with an index, and corresponding to the third vector with an index is not reported (or the value is 0). For example, 1 may indicate that the third amplitude coefficient and / or the third phase coefficient corresponding to the layer with an index, corresponding to the first vector (or first beam) with an index, and corresponding to the third vector with an index is reported (or the value is not 0).

[0198] In some embodiments, the number of one or more indicators (or one or more bitmaps) indicating non-zero coefficients may be the same as the number of layers. For example, each one indicator (or one bitmap) indicating a non-zero coefficient may correspond to one layer with an index.

[0199] In some embodiments, the size of the indicator (or bitmap) indicating a non-zero coefficient corresponding to a layer with an index may be based on any one of the number of a plurality of third vectors corresponding to the layer with an index, the number of a plurality of first vectors, the number of a plurality of second vectors, the number of a second plurality of antenna port groups, or the number of a plurality of second vectors.

[0200] In some embodiments, the number of a plurality of third vectors may be determined based on at least one of the number of layers, the size of one first sub-band, the first parameter of the codebook, the size of one second sub-band, the third parameter of the codebook, and the second parameter of the codebook.

[0201] In some embodiments, when the first amplitude coefficient of the antenna port group with index t is 0, the value of the bit (or code point) of the indicator (or bitmap) indicating a non-zero coefficient may be 0. This non-zero coefficient corresponds to the layer with an index, corresponds to a plurality of second vectors corresponding to the antenna port group with index t, and corresponds to a plurality of third vectors.

[0202] In some embodiments, when the first amplitude coefficient of the antenna port group with index t is 0, the indicator (or bitmap) indicating a non-zero coefficient corresponding to the antenna port group with index t may not be reported.

[0203] In some embodiments, the number of one or more indicators (or one or more bitmaps) indicating non-zero coefficients may be based on either the number of layers or one of the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, each of the one or more indicators (or one or more bitmaps) indicating non-zero coefficients may correspond to a layer having an index. In some embodiments, each of the one or more indicators (or one or more bitmaps) indicating non-zero coefficients may correspond to one of the first or second plurality of antenna port groups.

[0204] In some embodiments, the first number of non-zero coefficients corresponding to a layer having an index may be based on the second number of non-zero coefficients corresponding to an antenna port group having index t and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0205] In some embodiments, the number of one or more indicators (or fields) of a plurality of third amplitude coefficients corresponding to a layer having an index may be based on at least one of the first number of non-zero coefficients, the number of values (or bits or code points) having the value "1" in the indicator (or bitmap) indicating non-zero coefficients corresponding to the layer having the index, the number of the second plurality of antenna port groups, and one or more values of the first amplitude coefficients of the antenna port group having index t.

[0206] In some embodiments, one or more indicators (or fields) of a plurality of third amplitude coefficients may be included in the PMI, or the second part of the PMI, or the third part of the PMI. In some embodiments, for each antenna port group having index t, there may be one field of a plurality of third amplitude coefficients corresponding to one layer having an index.

[0207] In some embodiments, any one of the possible values of a third amplitude coefficient may be greater than 0 or may be non-zero.

[0208] In some embodiments, the number of one or more indicators (or fields) of a plurality of third amplitude coefficients corresponding to a layer having an index may be the first number of non-zero coefficients, the number of values (or bits or code points) having the value "1" in an indicator (or bitmap) indicating non-zero coefficients corresponding to the layer having the index, the number of a second plurality of antenna port groups, and at least one of one or more values of the first amplitude coefficients of the antenna port group having index t.

[0209] In some embodiments, the antenna port group having index t may be included in or indicated by the second plurality of antenna port groups.

[0210] In some embodiments, the number of one or more indicators (or fields) of a plurality of third phase coefficients corresponding to a layer having an index may be the first number of non-zero coefficients, the number of values (or bits or code points) having the value "1" in an indicator (or bitmap) indicating non-zero coefficients corresponding to the layer having the index, the number of a second plurality of antenna port groups, and at least one of one or more values of the first amplitude coefficients of the antenna port group having index t.

[0211] In some embodiments, one or more indicators (or fields) of a plurality of third phase coefficients may be included in the PMI, or the second part of the PMI, or the third part of the PMI. In some embodiments, for each antenna port group having index t, there may be one field of a plurality of phase amplitude coefficients corresponding to one layer having an index.

[0212] In some embodiments, the number of one or more indicators (or fields) of a plurality of third phase coefficients corresponding to a layer having an index may be based on a first number of non-zero coefficients, a number of values (or bits or code points) having a value of "1" in an indicator (or bitmap) indicating non-zero coefficients corresponding to the layer having the index, a number of a second plurality of antenna port groups, and at least one of one or more values of a first amplitude coefficient of an antenna port group having index t.

[0213] In some embodiments, an antenna port group having index t may be included in or indicated by a second plurality of antenna port groups.

[0214]

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[0220]

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[0221] In some embodiments, one or more indicators (or fields) of the plurality of second phase coefficients may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0222] In some embodiments, the terminal device may receive CSI-RS. Here, the number of antenna ports of the CSI-RS may be determined based on at least one parameter of the antenna ports. In some embodiments, the number of antenna ports of the CS-RS may be the product of the number of the first plurality of antenna port groups and the number of antenna ports within one antenna port group.

[0223] In some embodiments, for each of the second plurality of antenna port groups, one or more indicators of the plurality of third amplitude coefficients and / or one or more indicators of the plurality of third phase coefficients may be reported in or included in the PMI, or the second part of the PMI, or the third part of the PMI.

[0224] In some embodiments, one first vector may be determined based on one or more second vectors and at least one of one or more first amplitude coefficients and one or more first phase coefficients. In some embodiments, one first vector may further be determined based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0225]

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[0240]

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[0250] [Number]

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[0254] [Number]

[0255] [Number]

[0256] [Number]

[0257] In some embodiments, for bits or code points or values of one or more indicators (or one or more bitmaps) indicating non-zero coefficients whose values are 0, the third amplitude coefficient and / or the third phase coefficient corresponding to the bits or code points or values may be set to 0.

[0258] In some embodiments, the number of the plurality of first vectors may be based on the number of the plurality of second vectors, the number of the first plurality of antenna port groups, the number of the second plurality of antenna port groups, and at least one of the values of the plurality of first amplitude coefficients.

[0259]

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[0260]

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[0264]

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[0270]

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[0271]

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[0272] In some embodiments, the first vector corresponding to the third sub-band with an index may be determined based on one or more second vectors, one or more first amplitude coefficients corresponding to the third sub-band with the index, and one or more first phase coefficients corresponding to the third sub-band with the index.

[0273]

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[0280]

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[0281]

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[0299] In some embodiments, the first vector corresponding to the third sub-band having an index may be determined based on one or more second vectors, one or more fourth vectors, one or more first amplitude coefficients corresponding to the third sub-band having the index, and one or more first phase coefficients corresponding to the third sub-band having the index.

[0300]

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[0301]

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[0310]

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[0311] In some embodiments, the length of the first vector may be based on the number of the second plurality of antenna port groups. In some embodiments, the plurality of first vectors may be determined based on different codebook tables, where the different codebook tables may be based on the number of the second plurality of antenna port groups and at least one parameter of the antenna port setting.

[0312] In some embodiments, the length of one first vector may be determined based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0313]

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[0314]

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[0315]

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[0316]

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[0317] In some embodiments, the value of the first amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the indicator or field of the first amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the first amplitude coefficient, or the value of the indicator or field of the first amplitude coefficient, corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported by PMI.

[0318]

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[0319]

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[0320]

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[0321]

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[0322] In some embodiments, the value of the second amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the indicator or field of the second amplitude coefficient corresponding to an antenna port group not included in the second plurality of antenna port groups may be 0. In some embodiments, the value of the second amplitude coefficient, or the value of the indicator or field of the second amplitude coefficient, corresponding to an antenna port group not included in the second plurality of antenna port groups may not be reported by PMI.

[0323] [Number]

[0324] [Number]

[0325] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) indicating a non - zero coefficient with a value of 0, the value of the first amplitude coefficient corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field of the first amplitude coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of the first amplitude coefficient corresponding to the bit or code point or value, and / or the value of the indicator or field of the first amplitude coefficient corresponding to the bit or code point or value may not be reported by PMI.

[0326] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) indicating a non - zero coefficient with a value of 0, the value of the second amplitude coefficient corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field of the second amplitude coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of the second amplitude coefficient corresponding to the bit or code point or value, and / or the value of the indicator or field of the second amplitude coefficient corresponding to the bit or code point or value may not be reported by PMI.

[0327] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient with a value of 0, the value of the third amplitude coefficient corresponding to the bit or code point or value may be set to 0, and / or the value of the indicator or field of the third amplitude coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, the value of the third amplitude coefficient corresponding to the bit or code point or value, and / or the value of the indicator or field of the third amplitude coefficient corresponding to the bit or code point or value may not be reported by the PMI.

[0328] In some embodiments, for a bit or code point or value of one or more indicators (or one or more bitmaps) indicating a non-zero coefficient with a value of 0, at least one value of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit or code point or value may be set to 0, and / or at least one indicator or field value of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit or code point or value may be set to 0. In some embodiments, at least one value of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit or code point or value, and / or at least one indicator or field value of the first phase coefficient, the second phase coefficient, and the third phase coefficient corresponding to the bit or code point or value may not be reported by the PMI.

[0329]

Number

[0330]

Number

[0331] In some embodiments, the number of one or more indicators (or fields) of the plurality of first amplitude coefficients may be based on the number of the plurality of fourth vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0332]

Number

[0333] In some embodiments, one or more indicators (or fields) of the plurality of first amplitude coefficients may be included in the PMI, or the first part of the PMI, or the second part of the PMI.

[0334] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups. In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on one less than the number of the first plurality of antenna port groups or one less than the number of the second plurality of antenna port groups.

[0335]

Number

[0336] In some embodiments, the number of one or more indicators (or fields) of the plurality of first phase coefficients may be based on the number of the plurality of fourth vectors and either the number of the first plurality of antenna port groups or the number of the second plurality of antenna port groups.

[0337]

Number

[0338] In some embodiments, the first vector may be the result of Schmidt orthogonalization based on the first vector of the present disclosure.

[0339] In some embodiments, the antenna ports of the first plurality of antenna port groups may be within one CSI-RS. In some embodiments, each antenna port group may be at least one of the antenna ports within one code domain multiplexing (CDM) group within the CSI-RS resource and a subset of the antenna ports of the CSI-RS resource. In some embodiments, each antenna port group within the first plurality of antenna port groups and / or the second plurality of antenna port groups may correspond to one CSI-RS resource. In some embodiments, different antenna port groups within the first plurality of antenna port groups and / or the second plurality of antenna port groups may correspond to different CSI-RS resources.

[0340] In some embodiments, the terminal device may determine a first set of codebook indicators and a second set of codebook indicators, and / or report them in one CSI report or one PMI report. In some embodiments, the first set of codebook indicators may correspond to a first value of the number of a second plurality of antenna port groups, and the second set of codebook indicators may correspond to a second value of the number of the second plurality of antenna port groups. In some embodiments, at least one parameter or indicator corresponding to the first set of codebook indicators may be different from at least one parameter or indicator corresponding to the second set of codebook indicators. In some embodiments, the value of N3 corresponding to the first set of codebook indicators may be less than or equal to the value of N3 corresponding to the second set of codebook indicators, or may be smaller than that. In some embodiments, the value of the first parameter and / or the value of the fourth parameter corresponding to the first set of codebook indicators may be less than or equal to the value of the first parameter and / or the value of the fourth parameter corresponding to the second set of codebook indicators, or may be smaller than that. In some embodiments, the first value of the number of the second plurality of antenna port groups may be 1. In some embodiments, the second value of the number of the second plurality of antenna port groups may be 2 or 3 or 4. In some embodiments, the first set of codebook indicators may be a single-TRP hypothesis. In some embodiments, the second set of codebook indicators may be a multi-TRP hypothesis.

[0341] In some embodiments, the bit size of one or more indicators or fields of a plurality of third amplitude coefficients corresponding to a first set of codebook indicators and / or the bit size of one or more indicators or fields of a plurality of third phase coefficients may be smaller than the bit size of one or more indicators or fields of a plurality of third amplitude coefficients corresponding to a second set of codebook indicators and / or the bit size of one or more indicators or fields of a plurality of third phase coefficients.

[0342]

Number

[0343]

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[0344] In some embodiments, for the terminal device 130, the number of layers for PUSCH transmission (e.g., represented as v_ri) may be set or indicated. For example, the number of layers v_ri may be at least one of {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, for the terminal device 130, a precoding matrix for PUSCH transmission may be set or indicated. In some embodiments, the size of the precoding matrix may be 8*v_ri or v_ri*8. In some embodiments, the precoding matrix may have v_ri columns or rows. In some embodiments, each column or row of the precoding matrix may have 8 elements, and the index of the element may be represented as idx, where idx may be a non-negative integer. For example, 0 <= idx <= 7. In another example, 1 <= idx <= 8.

[0345]

Number

[0346] In some embodiments, the terminal device includes a circuit configured to receive at least one setting of a codebook from a network device.

[0347] In some embodiments, the terminal device includes a circuit configured to determine at least one codebook indicator based on at least one setting of the codebook.

[0348] In some embodiments, the terminal device includes a circuit configured to transmit at least one codebook indicator to a network device.

[0349] In some embodiments, the terminal device includes a circuit configured to receive at least one CSI-RS from a network device based on at least one setting.

[0350] In some embodiments, the network device includes a circuit configured to transmit at least one setting of a codebook to a terminal device.

[0351] In some embodiments, the network device includes a circuit configured to receive at least one codebook indicator from a terminal device.

[0352] In some embodiments, the network device includes a circuit configured to transmit at least one CSI-RS to a terminal device based on at least one setting.

[0353] FIG. 5 is a schematic block diagram of an apparatus 500 suitable for implementing embodiments of the present disclosure. The apparatus 500 can be considered as a further exemplary implementation of the terminal device or the network device shown in FIG. 1. Accordingly, the apparatus 500 can be implemented in, or at least as part of, a terminal device or a network device.

[0354] As shown in the figure, the apparatus 500 includes a processor 510, a memory 520 coupled to the processor 510, a suitable transmitter (TX) and receiver (RX) 540 coupled to the processor 510, and a communication interface coupled to the TX / RX 540. The memory 520 stores at least a part of the program 530. The TX / RX 540 is for two-way communication. The TX / RX 540 has at least one antenna for facilitating communication, but in practice, the access node described in this application may have multiple antennas. The communication interface may represent any interface necessary for communicating with other network elements, for example, the X2 interface for two-way communication between eNBs, the S1 interface for communication between a Mobility Management Entity (MME) / Serving Gateway (S-GW) and an eNB, the Un interface for communication between an eNB and a Relay Node (RN), or the Uu interface for communication between an eNB and a terminal device.

[0355] The program 530 is considered to include program instructions, and when the program is executed by the associated processor 510, it enables the apparatus 500 to operate according to the embodiments of the present disclosure as discussed with reference to FIGS. 2 to 4 herein. The embodiments herein may be implemented by computer software, hardware, or a combination of software and hardware executable by the processor 510 of the apparatus 500. The processor 510 may be configured to implement various embodiments of the present disclosure. Also, the combination of the processor 510 and the memory 520 may constitute a processing means 550 suitable for implementing various embodiments of the present disclosure.

[0356] Memory 520 may be of any type suitable for a local technical network and may be implemented by any suitable data storage technology (examples include, but are not limited to, computer-readable non-transitory storage media, semiconductor-based storage devices, magnetic storage devices and systems, optical storage devices and systems, fixed memory, and removable memory, etc.). Although only one memory 520 is shown for device 500, a plurality of physically different memory modules may be installed in device 500. Processor 510 may be of any type suitable for a local technical network and may include, for example, but not be limited to, a general-purpose computer, a dedicated computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor configuration, one or more of which may be included. Device 500 may have a plurality of processors, for example, an application-specific integrated circuit chip that is temporally dependent on a clock synchronized with a main processor.

[0357] Generally, various embodiments of the present disclosure may be implemented by hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented by hardware, and other aspects may be implemented by firmware or software that can be executed by a controller, a microprocessor, or other computing devices. Various aspects of the embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or shown by some other pictorial representation, and the blocks, devices, systems, techniques, or methods described herein may be implemented, for example, by hardware, software, firmware, dedicated circuits or logic, general-purpose hardware or a controller or other computing device, or a combination thereof, but it will be understood that they are not limited thereto.

[0358] The present disclosure further provides at least one computer program product tangibly stored on a computer-readable non-transitory memory medium. The computer program product includes computer-executable instructions, such as instructions included in program modules. The instructions are executed on a device on a target physical processor or virtual processor to perform the processes or methods described above with reference to any one of FIGS. 2 to 4. Usually, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of the program modules may be combined or divided among the program modules as needed. The machine-readable instructions of the program modules may be executed within a local or distributed device. In a distributed device, the program modules may be located on both local and remote storage media.

[0359] The program code for performing the method of the present disclosure may be described in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a dedicated computer, or other programmable data processing devices. When the program code is executed by the processor or controller, the functions / operations defined in the flowchart and / or block diagram are implemented. The program code may be executed entirely on a machine, partially on a machine, executed as an independent software package, partially executed on a machine and partially executed on a remote machine, or entirely executed on a remote machine or server.

[0360] The above program code may be embodied on a machine-readable medium, which may be any tangible medium that includes or stores a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium include electrical connections including one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the foregoing.

[0361] Note that, although the operations have been described in a particular order, it should not be understood that such operations must be performed in the order shown or sequentially in order to obtain the desired result, and in some situations multitasking and parallel processing may be advantageous. Similarly, although the above discussion includes some specific implementation details, these are not limitations on the scope of the present disclosure and should be construed as descriptions of features specific to particular embodiments. Some features described in the context of individual embodiments may be implemented in combination in one embodiment. Conversely, various features described in the context of one embodiment may be implemented separately in multiple embodiments or in any suitable sub-combination.

[0362] Although the present disclosure has been described in terms of words specific to structural features and / or methodological acts, it is to be understood that the disclosure defined by the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

[0363] As used herein, the term "terminal device" refers to any device having a wireless or wired communication function.Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cell phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communications (MTC) devices, vehicle-mounted devices for vehicle-to-everything (V2X) communication (where X means pedestrian, vehicle, or infrastructure / network), Integrated Access and Backhaul (IAB), small data transmission (SDT), mobility, multicast and broadcast services (MBS), positioning, dynamic / flexible duplexing in commercial networks, devices for RedCap (reduced capability), spacecraft or aircraft in non-terrestrial networks (NTN) including High Altitude Platforms (HAP) and satellites for unmanned aircraft systems (UAS), Extended Reality (XR) devices including different types of reality such as Augmented Reality (AR), Mixed Reality (MR), Virtual Reality (VR), unmanned aircraft (UAV: unmanned aircraft systems), which are generally known as drones and are airplanes that do not require a human pilot, devices on high speed trains (HST), imaging devices such as digital cameras, sensors, gaming devices, music storage / playback devices, or Internet devices that enable wireless / wired Internet access and browsing, etc., but are not limited thereto.The "terminal device" can further have a multicast / broadcast function, and supports public safety, mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, wireless services, wireless software delivery, group communication, and IoT applications. Also, one or more subscriber identity modules (SIMs), known as multi-SIM, may be incorporated. The term "terminal device" can be used interchangeably with UE, mobile station, subscriber equipment, mobile terminal, user terminal, or wireless device.

[0364] The term "network device" refers to a device capable of providing or hosting a cell or coverage with which the terminal device can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), next-generation NodeB (gNB), transmission reception point (TRP), remote radio unit (RRU), radio head (RH), remote radio head (RRH), IAB node, femto node, low-power nodes such as pico nodes, reconfigurable intelligent surface (RIS), network-controlled repeater (NCR), etc.

[0365] The terminal device or network device may have an artificial intelligence (AI) or machine learning function. Generally, it includes a model that can learn from a large number of data collected for a specific function and be used to predict some information.

[0366] The terminal device or network device may function in a plurality of frequency ranges, such as, for example, FR1 (410 MHz to 7125 MHz), FR2 (24.25 GHz to 71 GHz), frequency bands higher than 100 GHz, terahertz (THz), etc. Furthermore, it can function in licensed / unlicensed / shared spectrum. The terminal device may have multiple connections with the network device in a scenario applicable to multi-radio dual connectivity (MR-DC). The terminal device or network device can function in full-duplex, flexible-duplex, and cross-divided duplex modes.

[0367] The network device may have functions of network energy saving, self-organising networks (SON) / minimization of drive tests (MDT). The terminal may have a power-saving function.

[0368] Embodiments of the present disclosure may be implemented in test devices such as, for example, signal generators, signal analyzers, spectrum analyzers, network analyzers, test terminal devices, test network devices, channel emulators, etc.

[0369] Embodiments of the present disclosure may be implemented according to any generation of communication protocol known currently or developed in the future. Examples of communication protocols include, but are not limited to, communication protocols of the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G), 5.5G, 5G-Advanced Network, or sixth generation (6G) network.

Claims

1. In a terminal device, receiving at least one setting of a codebook from a network device, wherein the at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group; transmitting to the network device, based on the at least one setting of the codebook, the number of layers and at least one codebook indicator; comprising; the at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors, and at least one of the length of one first vector, the number of the plurality of first vectors, and the size of the one or more indicators of the plurality of first vectors is based on the number of the second plurality of antenna port groups; A communication method.

2. The second plurality of antenna port groups are the same as the first plurality of antenna port groups or a subset of the antenna port groups selected from the first plurality of antenna port groups; The method according to claim 1.

3. The at least one codebook indicator further includes a field of a plurality of third amplitude coefficients corresponding to one layer having an index, a field of a plurality of third phase coefficients corresponding to one layer having an index, a bitmap indicating non-zero coefficients corresponding to one layer having the index, and at least one of an indicator of the strongest coefficient corresponding to one layer having the index; the bitmap indicates which coefficients in the field of the plurality of third amplitude coefficients are non-zero or reported, the bitmap indicates which coefficients in the field of the plurality of third phase coefficients are non-zero or reported, and the size of the bitmap is based on the number of the second plurality of antenna port groups; the size of the indicator of the strongest coefficient is based on the number of the second plurality of antenna port groups; The method according to claim 1.

4. The at least one codebook indicator further includes a field of a plurality of third vectors corresponding to one layer having an index, and at least one of the number of the plurality of third vectors and the length of one third vector is based on the number of the second plurality of antenna port groups. The method according to claim 1.

5. The length of one third vector is determined based on a first parameter of a codebook and the number of first sub-bands, and the value of the first parameter of the codebook is determined based on the number of the second plurality of antenna port groups. The method according to claim 1.

6. The number of the plurality of third vectors is determined based on a third parameter of a codebook, the number of second sub-bands, and a first parameter of the codebook. The number of second sub-bands is based on the first parameter of the codebook and the number of first sub-bands. The second size of one second sub-band is determined based on the first parameter of the codebook and the first size of one first sub-band. The method according to claim 1.

7. When the number of the second plurality of antenna port groups is 1, the value of the first parameter of the codebook is a first value. When the number of the second plurality of antenna port groups is greater than 1, the value of the first parameter of the codebook is a second value greater than the first value. further includes at least one of The method according to claim 1.

8. When the number of the second plurality of antenna port groups is 1, the number of the plurality of first vectors is a third value. When the number of the second plurality of antenna port groups is greater than 1, the number of the plurality of first vectors is a fourth value greater than the third value. The number of the plurality of first vectors is determined to be the minimum value of the fourth value and a fifth value. The number of the plurality of first vectors is determined to be the maximum value of the third value and the fifth value, and the fifth value is the product of a first parameter of an antenna port setting, a second parameter of the antenna port setting, and the number of the second plurality of antenna port groups. The maximum number of non-zero coefficients corresponding to one layer having an index is determined based on the third parameter of the codebook, the number of a plurality of first vectors, and the number of a plurality of third vectors corresponding to the first layer, and further includes at least one of The method according to claim 1.

9. The size of the one or more indicators of the plurality of first vectors is determined based on a fifth value, and the number of the plurality of first vectors or the size of the one or more indicators of the plurality of first vectors is 0 based on at least one setting of the codebook. The method according to claim 1.

10. The number of a plurality of antenna ports within the one antenna port group is the product of a first parameter of the antenna port setting, a second parameter of the antenna port setting, and 2. The method according to claim 1.

11. The length of one first vector is based on dividing the product of the number of a plurality of antenna ports within the one antenna port group and the number of a plurality of second antenna port groups by 2, or is based on a fifth value. The method according to claim 1.

12. The number of the first plurality of antenna port groups is at least one of 2, 3, and 4, the number of the second plurality of antenna port groups is less than or equal to the number of the first plurality of antenna port groups, and is 1 or more. The method according to claim 1.

13. Receiving a reference signal, Determining at least one codebook indicator based on the reference signal, further includes The number of antenna ports of the reference signal is the product of the number of the first plurality of antenna port groups and the number of a plurality of antenna ports within the one antenna port group. The method according to claim 1.

14. In a network device, transmitting at least one setting of a codebook to a terminal device, wherein the at least one setting of the codebook includes a first plurality of antenna port groups and a plurality of antenna ports within one antenna port group, and receiving, from the terminal device, the number of layers and at least one codebook indicator based on the at least one setting of the codebook. includes The at least one codebook indicator includes one or more indicators of a second plurality of antenna port groups and one or more indicators of a plurality of first vectors, and at least one of a length of one first vector, a number of the plurality of first vectors, and a size of the one or more indicators of the plurality of first vectors is based on a number of the second plurality of antenna port groups. Communication method.

15. Further including transmitting a reference signal, A number of antenna ports of the reference signal is a product of a number of the first plurality of antenna port groups and a number of a plurality of antenna ports within the one antenna port group. The method according to claim 14.

16. In a terminal device, receiving at least one setting of a codebook, including one or more settings of a plurality of reference signals and one or more settings of a codebook corresponding to one of the plurality of reference signals, from a network device; Based on the at least one setting of the codebook, transmitting, to the network device, a number of layers and at least one codebook indicator; including The at least one codebook indicator includes an indication of a reference signal from the plurality of reference signals and one or more indicators of a first plurality of antenna ports, and at least one of a number of the first plurality of antenna ports and a size of the one or more indicators of the first plurality of antenna ports is based on one or more settings of the codebook corresponding to the indication of the reference signal, and the one or more settings of the codebook corresponding to the indication of the reference signal include a first parameter of antenna port setting and a second parameter of antenna port setting. Communication method.

17. The at least one codebook indicator further includes at least one of a field of a plurality of third amplitude coefficients corresponding to one layer having an index, a field of a plurality of third phase coefficients corresponding to one layer having an index, a bitmap indicating non-zero coefficients corresponding to one layer having an index, and an indicator of a strongest coefficient corresponding to one layer having an index. The bitmap indicates which coefficients in the field of the plurality of third amplitude coefficients are non-zero or reported, the bitmap indicates which coefficients in the field of the plurality of third phase coefficients are non-zero or reported, and the size of the bitmap is based on one or more settings of the codebook corresponding to the indication of the reference signal, The size of the indicator of the strongest coefficient is based on one or more settings of the codebook corresponding to the indication of the reference signal, The method according to claim 16.

18. The at least one codebook indicator further includes a field of a plurality of third vectors, and at least one of the number of the plurality of third vectors and the length of one third vector is based on one or more settings of the codebook corresponding to the indication of the reference signal, The method according to claim 16.

19. The length of one third vector is determined based on a first parameter of the codebook and the number of first sub-bands, and the value of the first parameter of the codebook is determined based on one or more settings of the codebook corresponding to the indication of the reference signal, The method according to claim 16.

20. The number of the plurality of third vectors is determined based on a third parameter of the codebook, the number of second sub-bands, and a first parameter of the codebook. The number of second sub-bands is based on the first parameter of the codebook and the number of first sub-bands. The second size of one second sub-band is determined based on the first parameter of the codebook and the first size of one first sub-band, The method according to claim 16.

21. When the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the first reference signal, the value of the first parameter of the codebook is the first value, When the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the second reference signal, the value of the first parameter of the codebook is the second value, further includes at least one of The method according to claim 16.

22. When the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the first reference signal, the number of the first plurality of antenna ports is a third value, When the value of the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting corresponds to the indication of the second reference signal, the number of the first plurality of antenna ports is a fourth value, The number of the first plurality of antenna ports is determined to be the minimum value between the fourth value and the fifth value, The number of the first plurality of antenna ports is determined to be the maximum value between the third value and the fifth value, and the fifth value is the product of the first parameter of the antenna port setting and the second parameter of the antenna port setting, Further including at least one of The method according to claim 16.

23. The size of the one or more indicators of the first plurality of antenna ports is determined based on a fifth value and the value of the number of the first plurality of antenna ports, The method according to claim 16.

24. Receiving the reference signal based on one or more settings of the codebook corresponding to the indication of the reference signal, Determining at least one codebook indicator based on the reference signal, Further including The method according to claim 16.

25. In a network device, transmitting at least one setting of a codebook, including one or more settings of a plurality of reference signals and one or more settings of a codebook corresponding to one reference signal, to a terminal device, Receiving, from the terminal device, the number of layers and at least one codebook indicator based on at least one setting of the codebook, Including The at least one codebook indicator includes an indication of a reference signal and one or more indicators of a first plurality of antenna ports, and at least one of the number of the first plurality of antenna ports and the size of the one or more indicators of the first plurality of antenna ports is based on one or more settings of the codebook corresponding to the indication of the reference signal, and the one or more settings of the codebook corresponding to the indication of the reference signal include a first parameter of an antenna port setting and a second parameter of an antenna port setting, Communication method.

26. further comprising transmitting the plurality of reference signals based on one or more settings of the codebook corresponding to one reference signal The method according to claim 25 **Claim 27** a processor; a memory coupled to the processor and storing instructions, wherein when the instructions are executed by the processor, the method according to any one of claims 1 to 13 or claims 16 to 24 is executed a terminal device **Claim 28** a processor; a memory coupled to the processor and storing instructions, wherein when the instructions are executed by the processor, the method according to any one of claims 14 to 15 or claims 25 to 26 is executed a network device

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