Beam state determination method

Abstract

A wireless communication method used in a wireless terminal is disclosed. The wireless communication method includes: receiving first command information including a first beam state from a wireless network node, determining at least one of a second beam state or a second reference signal based on the first beam state, and transmitting a target signal to the wireless network node by applying at least one of the second beam state or the second reference signal.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications. Background Art

[0002] One of the key features of the new radio (NR) access technology of the fifth generation (5G) mobile communication system is the support for high frequency bands. High frequency bands have abundant frequency domain resources, but the wireless signals in the high frequency bands attenuate quickly and the coverage of the wireless signals becomes smaller. Therefore, sending signals in beam mode can concentrate the energy in a relatively small spatial range and can improve the coverage of wireless signals in the high frequency bands. In the beam scenario, the beam pair between the base station and the user equipment (UE) may also change with the change of time and location. Therefore, a flexible beam update mechanism is required.

[0003] Currently, NR access technology supports a basic beam mechanism, where it is assumed that the UE has a single panel and / or communicates with a single transmit (Tx) receive (Rx) point (TRP). However, the basic beam mechanism may not be able to indicate beams for multi-channel and / or multi-panel / multi-TRP scenarios. Summary of the invention

[0004] The present disclosure relates to methods, systems, and devices for determining the beam state of a target signal.

[0005] The present disclosure relates to a wireless communication method used in a wireless terminal. The wireless communication method includes:

[0006] receiving a first command message including a first beam state from a wireless network node,

[0007] determining at least one of a second beam state or a second reference signal based on the first beam state, and

[0008] By applying at least one of a second beam state or a second reference signal, a target signal is transmitted to the wireless network node.

[0009] Various embodiments may preferably achieve the following features:

[0010] Preferably, one of the first beam state or the second beam state includes at least one of a quasi co-location state, a transmission configuration indicator state, spatial relationship information, reference signal information, spatial filter information or precoding information.

[0011] Preferably, the second beam state is associated with the first beam state.

[0012] Preferably, the second beam state is associated with a beam state group associated with the first beam state.

[0013] Preferably, the second beam state is a beam state having one of a predefined index, a first index, or a last index in a group of beam states associated with the first beam state.

[0014] Preferably, the wireless communication method further comprises receiving second command information from the wireless network node, the second command information indicating a beam state in the beam state group associated with the first beam state as a second beam state.

[0015] Preferably, the first command information is the latest command information received by the wireless terminal before the second command information.

[0016] Preferably, the first command information and the second command information are related to the same CORESET pool.

[0017] Preferably, the first command information and the second command information are related to at least one of the same BWP or the same serving cell.

[0018] Preferably, the first command information is the latest command information having a valid beam state received by the wireless terminal before the second command information.

[0019] Preferably, the second beam state is a beam state of a first mode associated with the first beam state.

[0020] Preferably, the beam state of the first mode has a beam granularity smaller than the beam granularity of the beam state of the second mode.

[0021] Preferably, the beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode.

[0022] Preferably, the number of beam states of the first mode is smaller than the number of beam states of the second mode.

[0023] Preferably, the second beam state is at least one of an upper layer beam state of the first beam state, a reference beam state of a reference signal in the first beam state, or a synchronization signal block associated with the first beam state.

[0024] Preferably, the second reference signal is associated with the reference signal in the first beam state.

[0025] Preferably, the second reference signal is determined according to at least one of the following:

[0026] a reference signal in a beam state of a reference signal in a first beam state,

[0027] a reference signal quasi-co-located with the reference signal in the first beam state, or

[0028] Spatial relationship of the reference signal RS in the first beam state.

[0029] Preferably, the second reference signal is determined according to at least one of the following:

[0030] a reference signal in a beam state having a reference signal of a quasi co-located type in a first beam state,

[0031] a reference signal having a quasi-co-located relationship with a reference signal of a quasi-co-located type in the first beam state, or

[0032] A spatial relationship reference signal of a first reference signal of a quasi co-site type in a first beam state.

[0033] Preferably, the first beam state comprises a plurality of reference signals.

[0034] Preferably, the target signal is not scheduled by the first downlink control information.

[0035] Preferably, the target signal is associated with the first command information or with a signal scheduled by the first command information.

[0036] Preferably, the association between the target signal and the first command information or the association between the target signal and the signal scheduled by the first downlink control information is predefined or configured by the radio network node.

[0037] Preferably, the target signal comprises at least one of a physical downlink control channel, a physical uplink control channel, a physical downlink shared channel, a physical uplink shared channel, a channel state information reference signal or a sounding reference signal.

[0038] The present disclosure relates to a wireless communication method used in a wireless network node. The wireless communication method includes:

[0039] sending a first command message including a first beam state to a wireless terminal, and

[0040] transmitting a target signal to a wireless terminal by applying at least one of a second beam state or a second reference signal,

[0041] At least one of the second beam state or the second reference signal is determined based on the first beam state.

[0042] Various embodiments may preferably achieve the following features:

[0043] Preferably, one of the first beam state or the second beam state includes at least one of a quasi co-location state, a transmission configuration indicator state, spatial relationship information, reference signal information, spatial filter information or precoding information.

[0044] Preferably, the second beam state is associated with the first beam state.

[0045] Preferably, the second beam state is associated with a beam state group associated with the first beam state.

[0046] Preferably, the second beam state is a beam state having one of a predefined index, a first index, or a last index in a group of beam states associated with the first beam state.

[0047] Preferably, the wireless communication method further comprises sending second command information to the wireless network node, wherein the second command information indicates a beam state in a beam state group associated with the first beam state as a second beam state.

[0048] Preferably, the first command information is the latest command information received by the wireless terminal before the second command information.

[0049] Preferably, the first command information and the second command information are related to the same CORESET pool.

[0050] Preferably, the first command information and the second command information are related to at least one of the same BWP or the same serving cell.

[0051] Preferably, the first command information is the latest command information having a valid beam state received by the wireless terminal before the second command information.

[0052] Preferably, the second beam state is a beam state of a first mode associated with the first beam state.

[0053] Preferably, the beam state of the first mode has a beam granularity smaller than the beam granularity of the beam state of the second mode.

[0054] Preferably, the beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode.

[0055] Preferably, the number of beam states of the first mode is smaller than the number of beam states of the second mode.

[0056] Preferably, the second beam state is at least one of an upper layer beam state of the first beam state, a reference beam state of a reference signal in the first beam state, or a synchronization signal block associated with the first beam state.

[0057] Preferably, the second reference signal is associated with the reference signal in the first beam state.

[0058] Preferably, the second reference signal is determined according to at least one of the following:

[0059] a reference signal in a beam state of a reference signal in a first beam state,

[0060] a reference signal quasi-co-located with the reference signal in the first beam state, or

[0061] Spatial relationship of the reference signal RS in the first beam state.

[0062] Preferably, the second reference signal is determined according to at least one of the following:

[0063] a reference signal in a beam state having a reference signal of a quasi co-located type in a first beam state,

[0064] a reference signal having a quasi-co-site relationship with a reference signal of a quasi-co-site type in the first beam state,

[0065] A spatial relationship reference signal of a first reference signal having a quasi co-site type in a first beam state.

[0066] Preferably, the first beam state comprises a plurality of reference signals.

[0067] Preferably, the target signal is not scheduled by the first downlink control information.

[0068] Preferably, the target signal is associated with the first command information or with a signal scheduled by the first command information.

[0069] Preferably, the association between the target signal and the first command information or the association between the target signal and the signal scheduled by the first downlink control information is predefined or configured by the radio network node.

[0070] Preferably, the target signal comprises at least one of a physical downlink control channel, a physical uplink control channel, a physical downlink shared channel, a physical uplink shared channel, a channel state information reference signal or a sounding reference signal.

[0071] The present disclosure relates to a wireless communication method used in a wireless terminal. The wireless communication method includes:

[0072] receiving a first beam state and a second beam state from a wireless network node, and

[0073] One of the first beam state and the second beam state is applied after a first time point, and the other of the first beam state and the second beam state is applied after a second time point.

[0074] Various embodiments may preferably achieve the following features:

[0075] Preferably, the second time point is determined based on at least one of the first time point or the time offset.

[0076] Preferably, the first point in time is different from the second point in time.

[0077] Preferably, the first beam state and the second beam state are received via at least one of DCI or MAC CE.

[0078] Preferably, the first beam state is used for the first link and the second beam state is used for the second link.

[0079] Preferably, the second time point is determined according to at least one of the following: a time point at which response information is received from the radio network node via the first link related to the first beam state, or a time offset.

[0080] Preferably, the first beam state is associated with a CORESET pool and the second beam state is associated with another CORESET pool.

[0081] The present disclosure relates to a wireless communication method used in a wireless network node. The wireless communication method includes:

[0082] sending a first beam state and a second beam state to a wireless terminal,

[0083] Among them, one of the first beam state and the second beam state is applied after a first time point, and the other of the first beam state and the second beam state is applied after a second time point.

[0084] Various embodiments may preferably achieve the following features:

[0085] Preferably, the second time point is determined based on at least one of the first time point or the time offset.

[0086] Preferably, the first point in time is different from the second point in time.

[0087] Preferably, the first beam state and the second beam state are received via at least one of DCI or MAC CE.

[0088] Preferably, the first beam state is used for the first link and the second beam state is used for the second link.

[0089] Preferably, the second time point is determined according to at least one of the following: a time point at which response information is received from the radio network node via the first link related to the first beam state, or a time offset.

[0090] Preferably, the first beam state is associated with a CORESET pool and the second beam state is associated with another CORESET pool.

[0091] The present disclosure relates to a wireless communication method used in a wireless terminal. The wireless communication method includes:

[0092] receiving, from a wireless network node, a plurality of beam states classified into a plurality of beam state groups,

[0093] Therein, a plurality of beam states are respectively applied after a plurality of time points.

[0094] Various embodiments may preferably achieve the following features:

[0095] Preferably, beam states in the same beam state group are applied after the same point in time.

[0096] Preferably, beam states in different beam state groups are applied after different time points.

[0097] Preferably, the earliest time point among the plurality of time points is a first time offset after a receiving time at which the plurality of beam states are received, wherein a second time offset exists between every two adjacent time points among the plurality of time points.

[0098] Preferably, at least one of the first time offset or the second time offset is configured via higher layer signaling.

[0099] The present disclosure relates to a wireless communication method used in a wireless network node. The wireless communication method includes:

[0100] sending a plurality of beam states classified into a plurality of beam state groups to a wireless terminal,

[0101] Therein, a plurality of beam states are respectively applied after a plurality of time points.

[0102] Various embodiments may preferably achieve the following features:

[0103] Preferably, beam states in the same beam state group are applied after the same point in time.

[0104] Preferably, beam states in different beam state groups are applied after different time points.

[0105] Preferably, the earliest time point among the plurality of time points is a first time offset after a receiving time at which the plurality of beam states are received, wherein a second time offset exists between every two adjacent time points among the plurality of time points.

[0106] Preferably, at least one of the first time offset or the second time offset is configured via higher layer signaling.

[0107] The present disclosure relates to a wireless terminal, comprising:

[0108] a communication unit configured to receive first command information including a first beam state from a wireless network node, and

[0109] a processor configured to determine at least one of a second beam state or a second reference signal based on the first beam state,

[0110] The communication unit is further configured to transmit the target signal to the wireless network node by applying at least one of a second beam state or a second reference signal.

[0111] Various embodiments may preferably achieve the following features:

[0112] Preferably, the processor is configured to execute any wireless communication method in the above methods.

[0113] The present disclosure relates to a wireless network node, comprising:

[0114] Communication unit, configured as:

[0115] sending a first command message including a first beam state to a wireless terminal, and

[0116] transmitting a target signal to a wireless terminal by applying at least one of a second beam state or a second reference signal,

[0117] At least one of the second beam state or the second reference signal is determined based on the first beam state.

[0118] Various embodiments may preferably achieve the following features:

[0119] Preferably, the wireless network node further comprises a processor configured to execute any wireless communication method in the above methods.

[0120] The present disclosure relates to a wireless terminal, comprising:

[0121] a communication unit configured to receive a first beam state and a second beam state from a wireless network node, and

[0122] A processor is configured to apply one of a first beam state and a second beam state after a first time point, and to apply the other of the first beam state and the second beam state after a second time point.

[0123] Various embodiments may preferably achieve the following features:

[0124] Preferably, the processor is configured to execute any wireless communication method in the above methods.

[0125] The present disclosure relates to a wireless network node, comprising:

[0126] a communication unit configured to send a first beam state and a second beam state to a wireless terminal,

[0127] Among them, one of the first beam state and the second beam state is applied after a first time point, and the other of the first beam state and the second beam state is applied after a second time point.

[0128] Various embodiments may preferably achieve the following features:

[0129] Preferably, the wireless network node further comprises a processor configured to execute any wireless communication method in the above methods.

[0130] The present disclosure relates to a wireless terminal, comprising:

[0131] a communication unit configured to receive a plurality of beam states classified into a plurality of beam state groups from a wireless network node, and

[0132] Therein, a plurality of beam states are respectively applied after a plurality of time points.

[0133] Various embodiments may preferably achieve the following features:

[0134] Preferably, the wireless terminal further comprises a processor configured to execute any wireless communication method in the above methods.

[0135] The present disclosure relates to a wireless network node, comprising:

[0136] a communication unit configured to transmit a plurality of beam states classified into a plurality of beam state groups to a wireless terminal,

[0137] Therein, a plurality of beam states are respectively applied after a plurality of time points.

[0138] Various embodiments may preferably achieve the following features:

[0139] Preferably, the wireless network node further comprises a processor configured to execute any wireless communication method in the above methods.

[0140] The present disclosure relates to a computer program product, including a computer-readable program medium code stored therein, which, when executed by a processor, causes the processor to implement any of the wireless communication methods described above.

[0141] The exemplary embodiments disclosed herein are intended to provide features that will become apparent by reference to the following description in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who have read this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0142] Therefore, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and / or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be rearranged while remaining within the scope of the present disclosure. Therefore, it will be understood by those of ordinary skill in the art that the methods and techniques disclosed herein present various steps or actions in an example order, and unless otherwise expressly stated, the present disclosure is not limited to the specific order or hierarchy presented. BRIEF DESCRIPTION OF THE DRAWINGS

[0143] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims.

[0144] Figure 1 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown.

[0145] Figure 2 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown.

[0146] Figure 3 A schematic diagram showing a beam state according to an embodiment of the present disclosure is shown.

[0147] Figure 4 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0148] Figure 5 A schematic diagram showing a beam state according to an embodiment of the present disclosure is shown.

[0149] Figure 6 A schematic diagram showing eight beam states according to an embodiment of the present disclosure is shown.

[0150] Figure 7 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0151] Figure 8 A schematic diagram showing a beam state according to an embodiment of the present disclosure is shown.

[0152] Fig. 9 A schematic diagram showing a beam state according to an embodiment of the present disclosure is shown.

[0153] Fig. 10A A schematic diagram of a multi-transmission and reception point / multi-panel scenario according to an embodiment of the present disclosure is shown.

[0154] Fig. 10B A schematic diagram of a multi-transmission and reception point / multi-panel scenario according to an embodiment of the present disclosure is shown.

[0155] Fig.11A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0156] Fig.12 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0157] Fig.13 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0158] Fig.14 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0159] Fig.15 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0160] Fig.16 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0161] Fig.17 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0162] Fig.18 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0163] Figure 1 A schematic diagram of a wireless terminal 10 according to an embodiment of the present disclosure is provided. The wireless terminal 10 may be a user equipment (UE), a mobile phone, a laptop, a tablet computer, an e-book, or a portable computer system, and is not limited herein. The wireless terminal 10 may include a processor 100, such as a microprocessor or an application specific integrated circuit (ASIC), a storage unit 110, and a communication unit 120. The storage unit 110 may be any data storage device that stores program code 112 accessed and executed by the processor 100. Embodiments of the storage unit 112 include, but are not limited to, a subscriber identity module (SIM), a read-only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 120 may be a transceiver, and is used to send and receive signals (e.g., messages or packets) according to the processing results of the processor 100. In one embodiment, the communication unit 120 communicates with the user via a communication device. Figure 1 At least one antenna 122 is shown for transmitting and receiving signals.

[0164] In one embodiment, storage unit 110 and program code 212 may be omitted, and processor 100 may include a storage unit with stored program code.

[0165] The processor 100 may implement any step in the illustrated embodiments by executing the program code 112 and the like on the wireless terminal 10 .

[0166] The communication unit 120 may be a transceiver. Alternatively or additionally, the communication unit 120 may combine a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless network node (eg, a base station), respectively.

[0167] Figure 2 A schematic diagram of a radio network node 20 according to an embodiment of the present disclosure is provided. The radio network node 20 may be a satellite, a base station (BS), a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN), a next generation RAN (NG-RAN), a data network, a core network, or a radio network controller (RNC), and is not limited herein. In addition, the radio network node 20 may include (execute) at least one network function, such as an access and mobility management function (AMF), a session management function (SMF), a user location function (UPF), a policy control function (PCF), an application function (AF), etc. The radio network node 20 may include a processor 200 (such as a microprocessor or an ASIC), a storage unit 210, and a communication unit 220. The storage unit 210 may be any data storage device that stores a program code 212 accessed and executed by the processor 200. Examples of the storage unit 212 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 220 may be a transceiver and is used to send and receive signals (eg, messages or packets) according to the processing results of the processor 200. In one example, the communication unit 220 transmits and receives the signals via Figure 2 At least one antenna 222 is shown for transmitting and receiving signals.

[0168] In one embodiment, storage unit 210 and program code 212 may be omitted. Processor 200 may include a storage unit with stored program code.

[0169] The processor 200 may implement any steps described in the illustrated embodiment by executing the program code 212 on the radio network node 20 .

[0170] The communication unit 220 may be a transceiver. Alternatively or additionally, the communication unit 220 may combine a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless terminal (eg, a user equipment), respectively.

[0171] In the present disclosure, a "QCL state" consists of one or more reference RSs and their corresponding QCL type parameters, wherein the QCL type parameters include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler shift, [3] delay spread, [4] average delay, [5] average gain, and [6] spatial parameters (also called spatial Rx parameters). In the present disclosure, a "TCI state" is equivalent to a "QCL state". In the present disclosure, the following definitions are given for "QCL-TypeA", "QCL-TypeB", "QCL-TypeC" and "QCL-TypeD".

[0172] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0173] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0174] - "QCL-TypeC": {Doppler shift, average delay}

[0175] - "QCL-TypeD": {spatial Rx parameters}

[0176] In the present disclosure, a beam may be equivalent to a beam state.

[0177] In one embodiment, the beam state of the first DCI is applied to the target transmission (e.g., target signal). More specifically, one of the beam states (e.g., indicated, contained, or included) in the first DCI is applied to the target transmission, wherein the target transmission is not scheduled by the first DCI.

[0178] Figure 3 FIG. 1 is a schematic diagram showing a beam state according to an embodiment of the present disclosure. Figure 3 In the embodiment, DCI-1 (e.g., the first DCI) includes (e.g., indicates) a beam state (e.g., one or more beam states from beam state #1 to beam state #3) for physical downlink shared channel (PDSCH) transmission. In one embodiment, the beam state is a downlink reference signal (RS). In one embodiment, the beam state included in DCI-1 can be applied to a subsequent PUSCH according to reciprocity between DL transmission and UL transmission.

[0179] exist Figure 3 In the illustrated embodiment, DCI-2 schedules the PUSCH transmission opportunity. When the PUSCH transmission opportunity uses the beam state in DCI-1, DCI-2 does not need to indicate the beam state used for PUSCH transmission. In other words, DCI-2 may only need to indicate scheduling information, such as time domain, frequency domain resources, TPMI (transmit precoding matrix index), port information, etc. Figure 3 As shown, beam state #2 in DCI-1 is applied to both PDSCH transmission timing and PUSCH transmission timing.

[0180] In one embodiment, the beam state applied to the target signal may be associated with another beam state included in the DCI that does not schedule the target signal or schedules other signals.

[0181] In one embodiment, the target signal includes at least one of a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), a channel state information reference signal (CSI-RS), or a sounding reference signal (SRS).

[0182] For example, the UE may receive a first command message including a first beam state, and may apply a second beam state associated with the first beam state to a target signal. In one embodiment, the target signal is not scheduled by the first command message, and / or the target signal is associated with a signal scheduled by the first command message.

[0183] In one embodiment, the (first) command information refers to DCI, medium access control element (MAC CE) or radio resource control signaling.

[0184] Figure 4 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Figure 4 The process shown can be compiled into program code and includes the following steps:

[0185] Step 400: Receive, by a UE, first command information including a first beam state.

[0186] Step 401: The UE determines a second beam state or a second reference signal based on a first beam state.

[0187] Step 402: The UE applies a second beam state or a second reference signal to a target signal.

[0188] exist Figure 4 In the process shown, the UE may receive first command information (e.g., DCI) from a BS (e.g., a gNB), wherein the first command information includes a first beam state. Based on the first beam state, the UE determines a second beam state or a second RS associated with the first beam state, and applies the determined second beam state or the determined second RS to a target signal.

[0189] In one embodiment, the beam state (e.g., the first beam state and / or the second beam state) includes (e.g., refers to or indicates) at least one of a quasi co-location (QCL) state, a transmission configuration indicator (TCI) state, spatial relationship information, RS information, spatial filter information, and / or precoding information.

[0190] In one embodiment, the second beam state is a beam state associated with the first beam state.

[0191] In one embodiment, the second beam state is a beam state associated with a beam state group associated with the first beam state. For example, the second beam state may be associated with a beam state group including the first beam state.

[0192] In one embodiment, the second beam state can be a wide beam state associated with (e.g., including) a beam state group associated with (e.g., including) the first beam state. For example, the beam state group associated with the first beam state can include a wide beam state and at least one narrow beam, wherein the wide beam state has a larger beam width and / or lower beamforming / array / antenna gain than each narrow beam state.

[0193] In one embodiment, the second beam state is a beam state having a first mode (e.g., mode 1) associated with the first beam state. In one embodiment, the beam state of the first mode has a beam granularity smaller than the beam granularity of the beam state of the second mode (e.g., mode 2). In one embodiment, the beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode. In one embodiment, the number of beam states of the first mode (e.g., configured for the UE) is less than the number of beam states of the second mode. That is, the beam state of the first mode can be a wide beam (state), and the beam state of the second mode is a narrow beam (state).

[0194] For example, the UE may be configured with at least one beam state of a first mode and at least one beam state of a second mode, wherein the beam state of the first mode has a smaller beam granularity than the beam state of the second mode. For example, the beam state of the first mode may refer to a wide beam state or a wider beam state than the beam state of the second mode 2. In one embodiment, the number of beam states of the first mode configured for the UE is not (expected to be) greater than the number of beam states of the second mode.

[0195] In one embodiment, the second beam state is a beam state having a specific index in a beam state group including or associated with the first beam state. For example, the specific index includes at least one of a predefined index, a maximum (e.g., last) index, or a minimum (first) index.

[0196] In one embodiment, the second beam state is a beam state located at a specific position associated with at least the first beam state and the second beam state. In one embodiment, the specific position includes the first beam state or the last beam state associated with the first beam state.

[0197] In one embodiment, the second beam state may be an upper layer beam state of the first beam state. It should be noted that, in a multi-layer beam state structure, the upper layer includes the upper first layer or the upper Xth layer, where X is a positive integer greater than 1.

[0198] In one embodiment, the second beam state is a reference beam state of the first beam state. In this embodiment, the reference beam state of the first beam state includes a direct reference beam state of the first beam state and / or an indirect reference beam state of the first beam state. In one embodiment, the indirect reference beam state of the first beam state refers to a reference beam state of the direct reference beam state of the first beam state.

[0199] In one embodiment, the second beam state is a synchronization signal block (SSB) (which may be referred to as a synchronization signal and physical broadcast channel (SS / PBCH) block) associated with the first beam state.

[0200] In one embodiment, the second RS is associated with the RS in the first beam state.

[0201] In one embodiment, the second RS is determined according to at least one of the following:

[0202] a beam state RS of a reference signal in a first beam state,

[0203] an RS quasi-co-located with the reference signal in the first beam state, or

[0204] The spatial relationship RS of RSs in the first beam state.

[0205] In one embodiment, the spatial relationship RS of the RS in the first beam state may refer to the spatial relationship of the RS in the reference first beam state.

[0206] In one embodiment, the second RS is determined according to at least one of the following:

[0207] a reference signal in a beam state having a reference signal of one QCL type in a first beam state,

[0208] a reference signal having a quasi-co-site relationship with a reference signal of a QCL type in a first beam state, or

[0209] A spatial relationship reference signal of a first reference signal of one QCL type in a first beam state.

[0210] In one embodiment, the QCL type may refer to QCL-TypeD, QCL assumed type or spatial parameters.

[0211] In one embodiment, there is more than one RS in the first beam state.

[0212] In one embodiment, the target signal is not scheduled through the first DCI.

[0213] In one embodiment, the first DCI schedules a signal. Alternatively, the first DCI is not used to schedule any signal.

[0214] In one embodiment, the type of the target signal is different from the type of signal scheduled by the first DCI (if any).

[0215] In one embodiment, the target signal may be scheduled by the second DCI.

[0216] In one embodiment, the target signal and / or the second DCI follows the first DCI.

[0217] In one embodiment, the target signal and / or the second DCI follows the signal scheduled by the first DCI.

[0218] In one embodiment, the target signal and / or the second DCI is after the beam state scheduled by the first DCI becomes valid (eg, available or being applied).

[0219] In one embodiment, the target signal is associated with a signal scheduled by the first DCI. In this embodiment, the association between the target signal and the signal scheduled by the first DCI is predefined or configured by the gNB or the network.

[0220] Figure 5 FIG. 1 is a schematic diagram showing a beam state according to an embodiment of the present disclosure. Figure 5 In the illustrated embodiment, for example, in a beam (state) group associated with a first beam state, the first beam state is a narrow beam (state), and the second beam state is a wide beam (state). In addition, the target signal includes a control channel (eg, PDCCH and / or PUCCH).

[0221] More specifically, in a multi-beam scenario, since a wide beam has a wider coverage, the beam changes less frequently when the UE moves. However, a wide beam can reach a smaller distance. Generally, a wide beam is suitable for a control channel due to its low data rate and high robustness. In contrast, a narrow beam is suitable for a data channel or a shared channel.

[0222] In order to enhance mobility performance, when the beam state indicated by (unified) command information is applied to multiple channels, the association between the wide beam indicated by (e.g., contained in) the command information and the narrow beam can be explored to apply the narrow beam indicated by the command information to the data channel and the associated wide beam to the control channel. Therefore, the overhead of beam indication is reduced, and stable beam change of the control channel can be obtained.

[0223] exist Figure 5 In the DCI-1 (i.e., the first command information), the beam state #2 of the PDSCH is indicated, where the beam state #2 is a narrow beam state and is associated with beam state #1, beam state #3, and beam state #4. It should be noted that beam state #1 and beam state #3 are narrow beam states, and beam state #4 is a wide beam state. In this case, wide beam state #4 can be applied to at least one of the associated PDCCH or PUCCH because wide beam state #4 is a wide beam state and is associated with beam state #2 indicated by DCI-1.

[0224] In one embodiment, when there are multiple beam states associated with the first beam state, one of the beam states may be selected to be applied to the target signal (e.g., a control channel). In one embodiment, the following beam states may be applied to the target signal:

[0225] 1) The current beam state of the target signal; or

[0226] 2) The first or last beam state associated with the first beam state (eg, the beam state with the highest index or the lowest index).

[0227] Figure 6 FIG. 8 is a schematic diagram showing eight beam states according to an embodiment of the present invention. Figure 6 As shown, beam state #1, beam state #2, ... beam state #6 are narrow beams, and beam state #A and beam state #B are wide beams. The association between the wide beam state and the narrow beam state is illustrated as follows:

[0228] - beam state #1, beam state #2, beam state #3, and beam state #4 are associated with beam state #A; and

[0229] -Beam state #3, beam state #4, beam state #5 and beam state #6 are associated with beam state #B.

[0230] It should be noted that beam state #3 is associated with both beam state #A and beam state #B. Similarly, beam state #4 is also associated with beam state #A and beam state #B.

[0231] In one embodiment, the first order information indicates beam state #1 of the PDSCH. In this embodiment, beam state #A may be applied to the associated PDCCH, for example, because beam state #A is associated with beam state #1 and is a wide beam.

[0232] In one embodiment, when the first command information indicates beam state #3 of the PDSCH, beam state #A is applied to the PDCCH.

[0233] In one embodiment, when the first command information indicates beam state #4 of the PDSCH, beam state #A is applied to the PDCCH. In this embodiment, beam state #4 is associated with beam state #A and beam state #B, and beam state #A is the current beam state of the target signal (i.e., PDCCH). Therefore, beam state #A is maintained as the beam state applied to the PDCCH.

[0234] In one embodiment, when the first command information indicates beam state #5 of the PDSCH, beam state #B is applied to the PDCCH.

[0235] In one embodiment, when the first command information indicates beam state #4 of the PDSCH, beam state #B is applied to the PDCCH. In this embodiment, beam state #4 is associated with beam state #A and beam state #B, and beam state #B is the current beam state of the target signal (i.e., PDCCH). Therefore, beam state #B is maintained as the beam state applied to the PDCCH.

[0236] In one embodiment, when a unified TCI framework is adopted, a second beam state associated with a first beam state included in the first command information and applied to a target signal may be determined based on the following embodiments:

[0237] In one embodiment, when the first command information indicates a TCI state, and there is a wide beam state or an upper beam state associated with the RS of the QCLtypeD information in the TCI state, the second beam state is the wide beam state or the upper beam state.

[0238] In one embodiment, when the first command information indicates a TCI state, and there is neither a wide beam state nor an upper beam state associated with the RS of the QCL typeD information in the TCI state, the second beam state is the RS of the QCL typeD information in the TCI state.

[0239] In one embodiment, when the first command information indicates a TCI state and there are both a wide beam state and a narrow beam state associated with the TCI state, the second beam state is the wide beam state.

[0240] In one embodiment, the second beam state applied to the target signal may be further indicated by the second command information. For example, the second command information may indicate a beam state within the beam state group associated with the first beam state indicated by the first command information as the second beam state applied to the target signal (e.g., target transmission). That is, the beam state indication applied to the target transmission has a 2-layer structure.

[0241] Figure 7 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Figure 7 The process shown may be performed by a UE and includes the following steps:

[0242] Step 700: Receive, by a UE, first command information including a first beam state and second command information including an additional beam state.

[0243] Step 701: The UE determines a second beam state or a second reference signal based on a first beam state and an additional beam state.

[0244] Step 702: The UE applies a second beam state or a second reference signal to a target signal.

[0245] exist Figure 7 In the process shown, the UE receives first command information and second command information from the BS, wherein the first command information includes (e.g., indicates) a first beam state, and the second command information includes an additional beam state. Based on the first beam state and the additional beam state, the UE determines a second beam state or a second RS, and applies the second beam state or the second RS to the target signal.

[0246] In one embodiment, the additional beam state is within a group of beam states associated with the first beam state.

[0247] Figure 8 FIG. 1 is a schematic diagram showing a beam state according to an embodiment of the present disclosure. Figure 8 In the DCI-1 (i.e., the first command information) indicates the beam state #2 (i.e., the first beam state) of the PDSCH, wherein the beam state #2 is associated with the beam state group including the beam state #1, the beam state #2, and the beam state #3. In addition, the DCI-2 (i.e., the second command information) indicates the beam state #3 (i.e., the additional beam state) of the PUSCH. It should be noted that the beam state #3 indicated by the DCI-2 is within the beam state group associated with the beam state #2.

[0248] Since the additional beam state is within a beam state group associated with the first beam state, the overhead of indicating the additional beam state in the second command information is expected to be lower than the overhead of indicating the first beam state in the first command information. Figure 8Taking the embodiment shown as an example, there are 6 beam states associated with DCI-1, and DCI-1 requires 3 bits to indicate one of the 6 beam states. In contrast, since a single beam state group includes 3 beam states, DCI-2 only requires 2 bits to indicate a beam state within a single beam state group. Therefore, a balance between overhead and flexibility can be achieved.

[0249] In one embodiment, due to the transmit power imbalance between gNB and UE, Figure 7 The process shown can be used for scenarios with long-range downlink coverage and short-range uplink coverage. More specifically, the power amplifier of the gNB is more powerful than the power amplifier of the UE. That is, the gNB can achieve higher transmit power than the UE. In such a case, downlink transmissions can use a wide beam state, and uplink transmissions can use a narrow beam state.

[0250] Fig. 9 FIG. 1 is a schematic diagram showing a beam state according to an embodiment of the present disclosure. Fig. 9 In the DCI-1, DCI-1 indicates beam state #4 (i.e., the first beam state) of downlink transmission (e.g., PDSCH), where beam state #4 is a wide beam state. In addition, DCI-2 indicates beam state #3 (i.e., an additional beam state) of uplink transmission (e.g., PUSCH). It should be noted that beam state #3 is a narrow beam state associated with beam state #3 (beam state group).

[0251] In one embodiment, from the perspective of the UE, there may be more than one command information before the second command information, and the following embodiment will describe which command information should be selected as the first command information.

[0252] In one embodiment, the second command information schedules an uplink signal, and the first command information precedes the second command information or before a first beam state indicated by the first command information becomes valid (available for or being applied to corresponding downlink transmission).

[0253] In one embodiment, the first command information is the latest command information that schedules the downlink signal before the second command information or before the first beam state indicated by the first command information becomes valid.

[0254] In one embodiment, the downlink signal comprises a PDSCH.

[0255] In one embodiment, the uplink signal comprises a PUSCH.

[0256] In one embodiment, the effective time may be different for different beam states indicated by the command information, so as to improve the robustness of beam switching in a multi-TRP / multi-panel (M-TRP / M-Pane l) scenario, etc.

[0257] In the M-TRP / M-Pane l scenario, there can be more than one beam link or beam pair between the gNB and the UE. Fig. 10A FIG. 1 shows a schematic diagram of an M-TRP / M-Pane l scenario according to an embodiment of the present disclosure. Fig. 10A In the example, the gNB has two TRPs, namely TRP-1 and TRP-2, where beams #1 to #6 are applicable to the UE, beams #A to #C are applicable to TRP-1, and beams #D to #F are applicable to TRP-2. In addition, there are 2 beam links (i.e., link 1 and link 2) between the UE and the gNB, where link 1 uses beam #C on the TRP-1 side and beam #5 on the UE side, and link 2 uses beam #E on the TRP-2 side and beam #2 on the UE side.

[0258] When the UE moves or rotates, the UE may need to update the beam status of all or part of the beam links. Fig. 10B FIG. 1 shows a schematic diagram of an M-TRP / M-Pane l scenario according to an embodiment of the present disclosure. Fig. 10B In the example, due to the movement or rotation of the UE, link 1 is updated to link 1', and link 1' is changed to use beam #6 on the UE side. Similarly, link 2 is updated to link 2', and link 2' is changed to use beam #1 on the UE side. Generally, the new beam (e.g., beam state #6 of link 1' or beam state #1 of link 2') is expected to be effective as soon as possible. However, since errors are sometimes inevitable in the beam update process, once there is a different understanding between the gNB and the UE, the communication between the gNB and the UE will be interrupted, or the UE must re-enter the network. For example, the gNB may notify the UE to change the new beam and does not receive the expected response from the UE for a period of time. In this case, the gNB cannot know whether the UE is monitoring the link of the old beam or the link of the new beam. For example, if the previous beam change notification fails to be sent to the UE, the UE can still work using the old beam. Alternatively, if the UE successfully receives the previous beam change notification and only the response from the UE fails to reach the gNB, the UE can work using the new beam. To solve this problem, a direct possibility is to strengthen the beam updating process, which may result in a time-consuming process that is undesirable in terms of time efficiency.

[0259] In the following embodiments, various embodiments for updating the beam status are illustrated. Those skilled in the art should appreciate that these embodiments may be implemented separately or in any possible combination.

[0260] Fig.11 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.11 The process shown in may be performed by a gNB (e.g., a BS) and includes the following steps:

[0261] Step 1100: The gNB transmits a new second beam state of the second link via the first link with the current first beam state or the second link with the current second beam state.

[0262] Step 1101: After the new second beam is stabilized, the gNB transmits a new first beam state of the first link via the second link with the new second beam state or the first link with the current first beam state.

[0263] exist Fig.11 In the process shown, the gNB transmits (e.g., sends to the UE) a new second beam state of the second link via the first link with the current first beam state (i.e., the beam state currently used for the first link) or via the second link with the current second beam state (i.e., the beam state currently used for the second link). After the new second beam is stabilized, the gNB transmits the new first beam state of the first link to the UE via the second link with the new second beam state or the first link with the current first beam state.

[0264] by Fig. 10A and Fig. 10B For example, the gNB sends a new second beam state (e.g., beam state #1) of the second link (e.g., link 2) via the first link (e.g., link 1) having the current first beam state (e.g., beam state #5). When the new second beam state of the second link (e.g., link 2') is stable (e.g., can work), the gNB sends a new first beam state (e.g., beam state #6) of the first link (e.g., link 1) via the second link (e.g., link 2') having the new second beam state. Then, link 1 is changed to link 1'.

[0265] In one embodiment, the new first beam state or the new second beam state may also be sent or received via both the first link and the second link.

[0266] In one embodiment, if only one link is selected to transmit the new beam state, the link with the higher quality between the first link and the second link may be selected.

[0267] Fig.12A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.12 The process shown in may be performed by a gNB (e.g., a BS) and includes the following steps:

[0268] Step 1200: The gNB transmits a new first beam state of a first link and a new second beam state of a second link to the UE, wherein one of the new first beam state and the new second beam state becomes valid after a first time point, and the other of the new first beam state and the new second beam state becomes valid after a second time point.

[0269] exist Fig.12 In the process shown, the gNB transmits a new first beam state of the first link and a new second beam state of the second link to the UE. In this embodiment, one of the new first beam state and the new second beam state becomes valid after a first time point, and the other of the new first beam state and the new second beam state becomes valid after a second time point. That is, the new first beam state and the new second beam state may become valid after different time points.

[0270] It should be noted that, according to the embodiment, becoming valid after a time point is equivalent to becoming valid at a time point.

[0271] In one embodiment, the first time point is earlier than the second time point.

[0272] In one embodiment, the gNB communicates with the UE via DCI or MAC CE.

[0273] In this embodiment, the benefits are low overhead (e.g., one DCI indicates multiple new beam states), high robustness (e.g., when the beam of one link is changed to a new beam, the beam of another link remains on the old beam without changing, i.e., there is no risk), and high time efficiency (e.g., one link with a new beam can work first, and when that link is stable, the other link can start changing to apply the corresponding new beam).

[0274] In one embodiment, the command information (e.g., DCI) indicates a plurality of beam states belonging to (e.g., classified into) X beam state groups, where X is a positive integer greater than 1. Among the plurality of beam states, beam states belonging to the same beam state group become valid at the same time point, and beam states belonging to different beam state groups become valid at different time points.

[0275] In one embodiment, the beam state indicated by the command information corresponds to multiple valid time points. Among the multiple valid time points:

[0276] - the earliest valid time point is determined by the time point of sending or receiving the command information; or the earliest time point is determined by the time point of sending or receiving the command information and the first time offset; and

[0277] - Another valid time point is determined by the earliest valid time point and an additional time offset.

[0278] In one embodiment, the first time offset and the additional time offset are predefined values ​​or configured by higher layer signaling (e.g., RRC signaling). In one embodiment, the predefined value can be configured by the gNB or determined based on UE capabilities.

[0279] In one embodiment, the DCI (sent at t0 and received at t0') indicates beam state #1 and beam state #2, wherein beam state #1 becomes valid at time point t1, and beam state #2 becomes valid at time point t2. In this embodiment, time point t1 is earlier than time point t2. In addition, the first time offset is denoted by TO, and the additional time offset is denoted by TA.

[0280] In one embodiment, the time point t1 is determined by the time point of sending or receiving the DCI (ie, t1 = t0 or t0').

[0281] In one embodiment, the time point t1 is determined by the time point of sending or receiving the DCI and a predefined first time offset (ie, t1 = t0 + TO, or t1 = t0 ′ + TO).

[0282] In one embodiment, the second time point is determined by the time point t1 and an additional time offset (ie, t2 = t1 + TA).

[0283] In one embodiment, when there are more than two beam states indicated by the DCI, the first valid time point is t1, the second valid time point is t1+TA, the third valid time point is t2+TA, and so on.

[0284] In one embodiment, the time offset between the second effective time point and the third effective time point may be different from the time offset between the first effective time point and the second effective time point.

[0285] In one embodiment, when there are multiple beam states indicated by command information (e.g., DCI) and the multiple beam states correspond to X valid time points, the order of the X valid time points depends on one of the following:

[0286] - an index of a beam state or beam state group corresponding to a valid time point;

[0287] - the order of beam states or beam state groups placed in the command information corresponding to the valid time points; and / or

[0288] - An index to a control resource set (CORESET) pool associated with the beam state or beam state group corresponding to the valid time point.

[0289] For example, the DCI may indicate beam state #1 and beam state #2. Since the index of beam state #1 is smaller than the index of beam state #2, the valid time point of beam state #1 is earlier than the valid time point of beam state #2.

[0290] In one embodiment, the DCI also indicates beam state #2 and beam state #1 in sequence. In this embodiment, although the index of beam state #1 is less than the index of beam state #2, when the order of beam states in the DCI is considered, the valid time point of beam state #2 is earlier than the valid time point of beam state #1 because beam state #2 is located before beam state #1 in the DCI.

[0291] In one embodiment, the DCI indicates beam state #1 and beam state #2, wherein beam state #1 is associated with CORESET pool #0, and beam state #2 is associated with CORESET pool #1. Because the index of CORESET pool #0 is less than the index of CORESET pool #1, in this embodiment, the valid time point of beam state #1 is earlier than the valid time point of beam state #2.

[0292] In one embodiment, the gNB may transmit (e.g., send to the UE) a new first beam state for the first link and a new second beam state for the second link, for example, via DCI and / or MAC CE. When the new first beam state or the second beam state becomes valid, the new first beam state or the second beam state may be applied to the target signal.

[0293] In one embodiment, the target signal includes one of PDCCH, PUCCH, PDSCH, PUSCH, CSI-RS or SRS.

[0294] Fig.13 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.13 The process shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0295] Step 1300: Receive first command information including a first beam state from a wireless network node.

[0296] Step 1301: Determine at least one of a second beam state or a second reference signal based on a first beam state.

[0297] Step 1302: Transmit a target signal to a wireless network node by applying at least one of a second beam state or a second reference signal.

[0298] exist Fig.13 In the process shown, the wireless terminal receives first command information from a wireless network node (e.g., a BS), wherein the first command information includes a first beam state. Based on the first beam state, the wireless terminal determines a second beam state and / or a second reference signal, and transmits a target signal to the wireless network node by applying the determined second beam state or the determined second reference signal. In other words, by applying the determined second beam state or the determined second reference signal, the wireless terminal sends / receives a target signal to / from the wireless network node.

[0299] In one embodiment, one of the first beam state or the second beam state includes at least one of a quasi co-location state, a transmission configuration indicator state, spatial relation information, reference signal information, spatial filter information, or precoding information.

[0300] In one embodiment, the second beam state is associated with the first beam state.

[0301] In one embodiment, the second beam state is associated with a beam state group associated with the first beam state.

[0302] In one embodiment, the second beam state is a beam state having one of a predefined index, a first index, or a last index in a group of beam states associated with the first beam state.

[0303] In one embodiment, the wireless terminal receives second command information from the wireless network node, and the second command information indicates a beam state in a beam state group associated with the first beam state as a second beam state.

[0304] In one embodiment, the first command information is the most recent command information received by the wireless terminal prior to the second command information.

[0305] In one embodiment, the first command information and the second command information are associated with the same CORESET pool.

[0306] In one embodiment, the first command information and the second command information are associated with at least one of the same BWP or the same serving cell.

[0307] In one embodiment, the first command information is the latest command information with a valid beam state received by the wireless terminal before the second command information.

[0308] In one embodiment, the second beam state is a beam state of a first mode associated with the first beam state.

[0309] In one embodiment, the beam states of the first mode have a smaller beam granularity than the beam states of the second mode.

[0310] In one embodiment, the beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode.

[0311] In one embodiment, the number of beam states of the first mode is less than the number of beam states of the second mode.

[0312] In one embodiment, the second beam state is at least one of an upper beam state of the first beam state, a reference beam state of a reference signal in the first beam state, or a synchronization signal block associated with the first beam state.

[0313] In one embodiment, the second reference signal is associated with the reference signal in the first beam state.

[0314] In one embodiment, the second reference signal is determined according to at least one of the following:

[0315] a reference signal in a beam state of a reference signal in a first beam state,

[0316] a reference signal quasi-co-located with the reference signal in the first beam state, or

[0317] Spatial relationship of the reference signal RS in the first beam state.

[0318] In one embodiment, the second reference signal is determined according to at least one of the following:

[0319] a reference signal in a beam state having a reference signal of a quasi co-located type in a first beam state,

[0320] a reference signal having a quasi-co-located relationship with a reference signal of a quasi-co-located type in the first beam state, or

[0321] A spatial relationship reference signal of a first reference signal of a quasi co-site type in a first beam state.

[0322] In one embodiment, the first beam state includes a plurality of reference signals.

[0323] In one embodiment, the target signal is not scheduled by the first downlink control information.

[0324] In one embodiment, the target signal is associated with the first command information or with a signal scheduled by the first command information.

[0325] In one embodiment, the association between the target signal and the first command information or the association between the target signal and the signal scheduled by the first downlink control information is predefined or configured by the radio network node.

[0326] In one embodiment, the target signal comprises at least one of a physical downlink control channel, a physical uplink control channel, a physical downlink shared channel, a physical uplink shared channel, a channel state information reference signal, or a sounding reference signal.

[0327] Fig.14 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.14 The process shown may be used in a wireless network node (e.g., a BS) and includes the following steps:

[0328] Step 1400: Send first command information including a first beam state to a wireless terminal.

[0329] Step 1401: Transmit a target signal to a terminal by applying at least one of a second beam state or a second reference signal.

[0330] exist Fig.14 In the process shown, the radio network node sends a first command message to a wireless terminal (e.g., UE), wherein the first command message includes a first beam state. Next, the radio network node transmits a target signal to the terminal by applying at least one of a second beam state or a second reference signal. In this embodiment, the second beam state and / or the second reference signal are determined based on the first beam state.

[0331] In one embodiment, one of the first beam state or the second beam state includes at least one of a quasi co-location state, a transmission configuration indicator state, spatial relation information, reference signal information, spatial filter information, or precoding information.

[0332] In one embodiment, the second beam state is associated with the first beam state.

[0333] In one embodiment, the second beam state is associated with a beam state group associated with the first beam state.

[0334] In one embodiment, the second beam state is a beam state having one of a predefined index, a first index, or a last index in a group of beam states associated with the first beam state.

[0335] In one embodiment, the radio network node sends second command information to the radio network node, wherein the second command information indicates a beam state in a beam state group associated with the first beam state as a second beam state.

[0336] In one embodiment, the first command information is the most recent command information received by the wireless terminal prior to the second command information.

[0337] In one embodiment, the first command information and the second command information are associated with the same CORESET pool.

[0338] In one embodiment, the first command information and the second command information are associated with at least one of the same BWP or the same serving cell.

[0339] In one embodiment, the first command information is the latest command information with a valid beam state received by the wireless terminal before the second command information.

[0340] In one embodiment, the second beam state is a beam state of a first mode associated with the first beam state.

[0341] In one embodiment, the beam states of the first mode have a smaller beam granularity than the beam states of the second mode.

[0342] In one embodiment, the beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode.

[0343] In one embodiment, the number of beam states of the first mode is less than the number of beam states of the second mode.

[0344] In one embodiment, the second beam state is at least one of an upper beam state of the first beam state, a reference beam state of a reference signal in the first beam state, or a synchronization signal block associated with the first beam state.

[0345] In one embodiment, the second reference signal is associated with the reference signal in the first beam state.

[0346] In one embodiment, the second reference signal is determined according to at least one of the following:

[0347] a reference signal in a beam state of a reference signal in a first beam state,

[0348] a reference signal quasi-co-located with the reference signal in the first beam state, or

[0349] Spatial relationship of the reference signal RS in the first beam state.

[0350] In one embodiment, the second reference signal is determined according to at least one of the following:

[0351] a reference signal in a beam state having a reference signal of a quasi co-located type in a first beam state,

[0352] a reference signal having a quasi-co-located relationship with a reference signal of a quasi-co-located type in the first beam state, or

[0353] A spatial relationship reference signal of a first reference signal of a quasi co-site type in a first beam state.

[0354] In one embodiment, the first beam state includes a plurality of reference signals.

[0355] In one embodiment, the target signal is not scheduled by the first downlink control information.

[0356] In one embodiment, the target signal is associated with the first command information or with a signal scheduled by the first command information.

[0357] In one embodiment, the association between the target signal and the first command information or the association between the target signal and the signal scheduled by the first downlink control information is predefined or configured by the radio network node.

[0358] In one embodiment, the target signal comprises at least one of a physical downlink control channel, a physical uplink control channel, a physical downlink shared channel, a physical uplink shared channel, a channel state information reference signal, or a sounding reference signal.

[0359] Fig.15 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.15 The process shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0360] Step 1500: Receive a first beam state and a second beam state from a wireless network node.

[0361] Step 1501: Apply one of a first beam state and a second beam state after a first time point, and apply the other of the first beam state and the second beam state after a second time point.

[0362] exist Fig.15 In the process shown, the wireless terminal receives a first beam state and a second beam state from a wireless network node (e.g., a BS). In this embodiment, the wireless terminal applies one of the first beam state and the second beam state after a first time point, and applies the other of the first beam state and the second beam state after a second time point.

[0363] In one embodiment, the second time point is determined based on at least one of the first time point or the time offset.

[0364] In one embodiment, the first point in time is different from the second point in time.

[0365] In one embodiment, the first beam state and the second beam state are received via at least one of a DCI or a MAC CE.

[0366] In one embodiment, a first beam state is used for a first link and a second beam state is used for a second link.

[0367] In one embodiment, the second time point is determined according to at least one of the following: a time point at which response information is received from the radio network node via the first link related to the first beam state, or a time offset.

[0368] In one embodiment, the first beam state is associated with a CORESET pool and the second beam state is associated with another CORESET pool.

[0369] Fig.16 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.16 The process shown may be used in a wireless network node (e.g., a BS) and includes the following steps:

[0370] Step 1600: Send a first beam state and a second beam state to a wireless terminal, wherein one of the first beam state and the second beam state is applied after a first time point, and the other of the first beam state and the second beam state is applied after a second time point.

[0371] exist Fig.16 In the process shown, the wireless network node sends a first beam state and a second beam state to a wireless terminal (e.g., UE). It should be noted that one of the first beam state and the second beam state is applied after a first time point, and the other of the first beam state and the second beam state is applied after a second time point.

[0372] In one embodiment, the second time point is determined based on at least one of the first time point or the time offset.

[0373] In one embodiment, the first point in time is different from the second point in time.

[0374] In one embodiment, the first beam state and the second beam state are received via at least one of a DCI or a MAC CE.

[0375] In one embodiment, a first beam state is used for a first link and a second beam state is used for a second link.

[0376] In one embodiment, the second time point is determined according to at least one of the following: a time point at which response information is received from the radio network node via the first link related to the first beam state, or a time offset.

[0377] In one embodiment, the first beam state is associated with a CORESET pool and the second beam state is associated with another CORESET pool.

[0378] Fig.17 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.17 The process shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0379] Step 1700: Receive a plurality of beam states classified into a plurality of beam state groups from a wireless network node, wherein the plurality of beam states are applied respectively after a plurality of time points.

[0380] exist Fig.17 In the process shown, the wireless terminal receives multiple beam states from a wireless network node (eg, a BS), wherein the multiple beam states are classified into multiple beam state groups. In this embodiment, the multiple beam states are applied respectively after multiple time points.

[0381] In one embodiment, beam states in the same beam state group become valid after the same point in time.

[0382] In one embodiment, beam states in different beam state groups become valid after different points in time.

[0383] In one embodiment, the earliest time point among the plurality of time points is a first time offset after a receiving time at which the plurality of beam states are received, wherein a second time offset exists between every two adjacent time points among the plurality of time points.

[0384] In one embodiment, at least one of the first time offset or the second time offset is configured via higher layer signaling.

[0385] Fig.18 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Fig.18 The process shown may be used in a wireless network node (e.g., a BS) and includes the following steps:

[0386] Step 1800: Send a plurality of beam states classified into a plurality of beam state groups to a wireless terminal, wherein the plurality of beam states are applied respectively after a plurality of time points.

[0387] exist Fig.18 In the process shown, a radio network node sends a plurality of beam states to a wireless terminal (eg, UE), wherein the plurality of beam states are classified into a plurality of beam state groups. In this embodiment, the plurality of beam states are applied respectively after a plurality of time points.

[0388] In one embodiment, beam states in the same beam state group become valid after the same point in time.

[0389] In one embodiment, beam states in different beam state groups become valid after different points in time.

[0390] In one embodiment, the earliest time point among the plurality of time points is a first time offset after a receiving time at which the plurality of beam states are received, wherein a second time offset exists between every two adjacent time points among the plurality of time points.

[0391] In one embodiment, at least one of the first time offset or the second time offset is configured via higher layer signaling.

[0392] Although various embodiments of the present disclosure have been described above, it should be understood that these embodiments are presented by way of example only, rather than by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present disclosure. However, these people will understand that the present disclosure is not limited to the example architectures or configurations shown, but may be implemented using various alternative architectures and configurations. Additionally, as will be understood by those of ordinary skill in the art, one or more features of an embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the exemplary embodiments described above.

[0393] It should also be understood that any reference to an element using names such as "first," "second," etc., herein generally does not limit the number or order of these elements. Instead, these names are used herein to facilitate distinguishing between two or more elements or element instances. Thus, reference to a first element and a second element does not mean that only two elements can be used, or that the first element must be before the second element in some manner.

[0394] Additionally, it will be understood by those skilled in the art that information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0395] Those skilled in the art will further understand that any of the various illustrative logical blocks, units, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of both), firmware, various forms of programs or design codes incorporating instructions (which, for convenience, may be referred to herein as "software" or "software units"), or any combination of these technologies.

[0396] In order to clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, circuits and steps have been generally described above according to their functions. Whether such functions are implemented as hardware, firmware or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the entire system. Skilled technicians can implement the described functions in various ways for each specific application, but such implementation decisions will not lead to deviations from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, units, etc. can be configured to perform one or more of the functions described herein. The terms "configured to" or "configured for" used herein for a specific operation or function refer to a processor, device, component, circuit, structure, machine, unit, etc., which is physically constructed, programmed and / or arranged to perform a specific operation or function.

[0397] In addition, it will be understood by those skilled in the art that the various exemplary logic blocks, units, devices, components and circuits described herein may be implemented in or performed by an integrated circuit (IC), which may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device or any combination thereof. The logic blocks, units and circuits may also include antennas and / or transceivers to communicate with various components within a network or device. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other suitable configuration to perform the functions described herein. If implemented in software, these functions may be stored in a computer-readable medium as one or more instructions or codes. Therefore, the steps of the method or algorithm disclosed herein may be implemented as software stored in a computer-readable medium.

[0398] Computer-readable media include both computer storage media and communication media, including any medium capable of transferring a computer program or code from one place to another. Storage media can be any available medium that a computer can access. As an example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0399] In this article, the term "unit" used herein refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. In addition, for the purpose of discussion, various units are described as discrete units; however, it is obvious to those of ordinary skill in the art that two or more units can be combined to form a single unit that performs the associated functions according to the embodiments of the present disclosure.

[0400] Additionally, in embodiments of the present disclosure, memory or other storage devices and communication components may be used. It will be understood that, for clarity, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it is apparent that any suitable functional distribution between different functional units, processing logic elements or domains may be used without departing from the present disclosure. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic elements or controllers. Therefore, references to specific functional units are merely references to suitable components for providing the described functions, rather than indicating a strict logical or physical structure or organization.

[0401] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but is to be consistent with the broadest scope consistent with the novel features and principles disclosed herein, as described in the following claims.

Claims

1. A wireless communication method used in a wireless terminal, the wireless communication method comprising: receiving a first command message including a first beam state from a wireless network node, receiving second command information from the radio network node, the second command information indicating a beam state in a beam state group associated with the first beam state as a second beam state, determining at least one of a second beam state or a second reference signal based on the first beam state, and transmitting a target signal to the radio network node by applying at least one of the second beam state or the second reference signal, The first command information is the latest command information received by the wireless terminal before the second command information. The first command information and the second command information are related to the same control resource set CORESET pool.

2. The wireless communication method according to claim 1, wherein: One of the first beam state or the second beam state includes at least one of a quasi co-location state, a transmission configuration indicator state, spatial relationship information, reference signal information, spatial filter information, or precoding information.

3. The wireless communication method according to claim 1, wherein: The second beam state is associated with the first beam state.

4. The wireless communication method according to claim 1, wherein: The second beam state is associated with a beam state group associated with the first beam state.

5. The wireless communication method according to claim 4, wherein: The second beam state is a beam state having one of a predefined index, a first index, or a last index in the group of beam states associated with the first beam state.

6. The wireless communication method according to claim 1, wherein: The first command information and the second command information are associated with at least one of a same bandwidth part BWP or a same serving cell.

7. The wireless communication method according to claim 1, wherein: The first command information is the latest command information with a valid beam state received by the wireless terminal before the second command information.

8. The wireless communication method according to claim 1, wherein: The second beam state is a beam state of a first mode associated with the first beam state.

9. The wireless communication method according to claim 8, wherein: The beam state of the first mode has a beam granularity smaller than a beam granularity of the beam state of the second mode.

10. The wireless communication method according to claim 8, wherein: The beam width of the beam state of the first mode is wider than the beam width of the beam state of the second mode.

11. The wireless communication method according to claim 8, wherein: The number of beam states of the first mode is less than the number of beam states of the second mode.

12. The wireless communication method according to claim 1, wherein: The second beam state is at least one of an upper layer beam state of the first beam state, a reference beam state of a reference signal in the first beam state, or a synchronization signal block associated with the first beam state.

13. The wireless communication method according to claim 1, wherein: The second reference signal is associated with a reference signal in the first beam state.

14. The wireless communication method according to claim 1, wherein: The second reference signal is determined according to at least one of the following: a reference signal in a beam state of a reference signal in a first beam state, a reference signal quasi-co-located with the reference signal in the first beam state, or The spatial relationship of the reference signal RS in the first beam state.

15. The wireless communication method according to claim 1, wherein: The second reference signal is determined according to at least one of the following: a reference signal in a beam state having a reference signal of a quasi co-located type in said first beam state, a reference signal having a quasi-co-location relationship with a reference signal of a quasi-co-location type in the first beam state, A spatial relationship reference signal of a first reference signal of a quasi co-location type in the first beam state.

16. The wireless communication method according to claim 15, wherein: The first beam state includes a plurality of reference signals.

17. The wireless communication method according to claim 1, wherein: The target signal is not scheduled by the first downlink control information.

18. The wireless communication method according to claim 1, wherein: The target signal is associated with the first command information or with a signal scheduled by the first command information.

19. The wireless communication method according to claim 18, wherein: The association between the target signal and the first command information or the association between the target signal and a signal scheduled by the first downlink control information is predefined or configured by the radio network node.

20. The wireless communication method according to any one of claims 1 to 19, wherein: The target signal includes at least one of a physical downlink control channel, a physical uplink control channel, a physical downlink shared channel, a physical uplink shared channel, a channel state information reference signal, or a sounding reference signal.

21. A wireless communication method used in a wireless network node, the wireless communication method comprising: sending a first command message including a first beam state to a wireless terminal, sending second command information to the wireless terminal, wherein the second command information indicates a beam state in a beam state group associated with the first beam state as a second beam state, and transmitting a target signal to the wireless terminal by applying at least one of a second beam state or a second reference signal, wherein at least one of the second beam state or the second reference signal is determined based on the first beam state, The first command information is the latest command information sent by the wireless network node before the second command information. The first command information and the second command information are related to the same control resource set CORESET pool.

22. A wireless terminal, comprising: a communication unit configured to receive first command information including a first beam state from a radio network node, the communication unit further configured to receive second command information from the radio network node, the second command information indicating a beam state in a beam state group associated with the first beam state as a second beam state, and a processor configured to determine at least one of a second beam state or a second reference signal based on the first beam state, The communication unit is further configured to transmit a target signal to the radio network node by applying at least one of the second beam state or the second reference signal. The first command information is the latest command information received by the wireless terminal before the second command information. The first command information and the second command information are related to the same control resource set CORESET pool.

23. The wireless terminal according to claim 22, wherein: The processor is further configured to execute the wireless communication method according to any one of claims 2 to 20.

24. A wireless network node, comprising: Communication unit, configured as: sending a first command message including a first beam state to a wireless terminal, and sending second command information to the wireless terminal, wherein the second command information indicates a beam state in a beam state group associated with the first beam state as a second beam state, transmitting a target signal to the wireless terminal by applying at least one of a second beam state or a second reference signal, wherein at least one of the second beam state or the second reference signal is determined based on the first beam state, The first command information is the latest command information sent by the wireless network node before the second command information. The first command information and the second command information are related to the same control resource set CORESET pool.

25. A computer program product comprising computer readable program medium codes stored therein, which, when executed by a processor, cause the processor to implement the wireless communication method according to any one of claims 1 to 21.

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