Method and apparatus for determining QCL reference, and device

Abstract

The present application relates to the field of communications, and discloses a method and apparatus for determining a QCL reference, and a device. The method for determining a QCL reference in embodiments of the present application comprises: a terminal determines a QCL reference of a first signal, wherein the QCL reference comprises at least one of at least one SSB and at least one TRS; and the terminal sends or receives the first signal on the basis of the QCL reference.

Description

Methods, apparatus and equipment for determining QCL references

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411883640.1, filed on December 19, 2024, entitled “Method, Apparatus and Device for Determining QCL Reference”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, and specifically relates to a method, apparatus and device for determining a QCL reference. Background Technology

[0004] In New Radio (NR) systems, Quasi-Co-Location (QCL) refers to the characteristics of the channel experienced by a symbol at a certain antenna port, such as average delay, delay spread, Doppler frequency offset, Doppler spread, spatial correlation, and spatial reception parameters, which can be inferred from another antenna port.

[0005] However, with the evolution of communication technology, the current QCL reference design is no longer applicable in some scenarios. For example, when multiple discrete spectra are aggregated to form a large bandwidth, how to determine a more suitable QCL reference for the signal transmitted on this large bandwidth in order to improve the system's transmission performance is a problem that needs to be solved. Summary of the Invention

[0006] This application provides a method, apparatus, and device for determining a QCL reference, which can solve the design problem of QCL reference in the case of aggregating multiple discrete spectrums to form a large bandwidth, thereby improving the transmission performance of the system.

[0007] Firstly, a method for determining the QCL reference is provided, including:

[0008] The terminal determines a QCL reference for a first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0009] The terminal sends or receives the first signal according to the QCL reference.

[0010] Secondly, a method for determining the QCL reference is provided, including:

[0011] The network-side device determines a QCL reference for the first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0012] The network-side device receives or sends the first signal according to the QCL reference.

[0013] Thirdly, an apparatus for determining a QCL reference is provided, comprising: a processing module, a transmitting module, and a receiving module;

[0014] The processing module is used to determine the QCL reference of the first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0015] The transmitting module is configured to transmit the first signal according to the QCL reference, or the receiving module is configured to receive the first signal according to the QCL reference.

[0016] Fourthly, an apparatus for determining a QCL reference is provided, comprising: a processing module, a transmitting module, and a receiving module;

[0017] The processing module is used to determine the QCL reference of the first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0018] The receiving module is configured to receive the first signal according to the QCL reference, or the transmitting module is configured to transmit the first signal according to the QCL reference.

[0019] Fifthly, an apparatus for determining a QCL reference is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0020] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0021] Seventhly, a terminal is provided, including a processor and a communication interface;

[0022] The processor is used to determine a QCL reference for a first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0023] The communication interface is used to send or receive the first signal according to the QCL reference.

[0024] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0025] Ninthly, a network-side device is provided, including a processor and a communication interface;

[0026] The processor is used to determine a QCL reference for a first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0027] The communication interface is used to receive or send the first signal according to the QCL reference.

[0028] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0029] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0030] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0031] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method for determining a QCL reference as described in the first aspect, or to implement the steps of the method for determining a QCL reference as described in the second aspect.

[0032] In the embodiments of this application, the terminal can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference. Attached Figure Description

[0033] Figure 1 is a schematic diagram of a communication system architecture provided in an embodiment of this application.

[0034] Figure 2 is a schematic diagram of a TRS structure provided in this application.

[0035] Figure 3 is one of the schematic flowcharts of a method for determining a QCL reference according to an embodiment of this application.

[0036] Figure 4 is a second schematic flowchart of a method for determining a QCL reference according to an embodiment of this application.

[0037] Figure 5 is a schematic diagram of a TRS corresponding to multiple sub-bandwidths according to an embodiment of this application.

[0038] Figure 6 is a schematic diagram of each TRS corresponding to a sub-bandwidth according to an embodiment of this application.

[0039] Figure 7 is a schematic diagram of a portion of the TRS corresponding to multiple sub-bandwidths according to an embodiment of this application.

[0040] Figure 8 is a schematic diagram of a PDSCH-based TRS QCL reference provided according to an embodiment of this application.

[0041] Figure 9 is a schematic diagram of a PDCCH-based QCL reference according to an embodiment of this application.

[0042] Figure 10 is a schematic diagram of an SSB-based QCL reference provided according to an embodiment of this application.

[0043] Figure 11 is a schematic diagram of a QCL reference based on SSB and TRS provided according to an embodiment of this application.

[0044] Figure 12 is one of the schematic block diagrams of an apparatus for determining a QCL reference according to an embodiment of this application.

[0045] Figure 13 is a second schematic block diagram of an apparatus for determining a QCL reference according to an embodiment of this application.

[0046] Figure 14 is a schematic block diagram of a communication device provided according to an embodiment of this application.

[0047] Figure 15 is a schematic diagram of the hardware structure of a terminal according to an embodiment of this application.

[0048] Figure 16 is a schematic block diagram of a network-side device provided according to an embodiment of this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0050] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0051] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0052] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0053] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. Specifically, the wireless communication system includes a terminal 11 and a network-side device 12.

[0054] Terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipborne equipment, pedestrian user equipment (PUE), smart home device (home device with wireless communication function, such as refrigerator, television, washing machine or furniture), game console, personal computer (PC), ATM or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in the embodiments of this application.

[0055] Among them, network-side equipment 12 may include access network equipment.

[0056] Alternatively, access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, wireless local area network (WLAN) access points (APs), or wireless Fidelity (WiFi) nodes, etc. The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to any specific technical terminology. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0057] To better understand the technical solution of this application, the SSB related to this application is explained below.

[0058] In an NR system, the terminal (User Equipment, UE) first performs initial access by receiving an SSB.

[0059] The SSB consists of Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), the Physical Broadcast Channel (PBCH), and the Demodulation Reference Signal (DMRS) of the PBCH. PSS and SSS are used for coarse time-frequency synchronization, the PBCH carries the Master Information Block (MIB), and the DMRS of the PBCH is used for demodulation. The entire SSB occupies four Orthogonal Frequency-Division Multiplexing (OFDM) symbols in the time domain and a maximum of 20 resource blocks (RBs) in the frequency domain. Due to the limited time-frequency resources occupied by the SSB, only relatively preliminary coarse time-frequency synchronization can be performed based on it.

[0060] When the terminal receives an SSB, it can first detect the PSS sequence and obtain the Physical Cell Identifier (ID) based on the sequence correlation. And obtain preliminary time-frequency synchronization; then detect SSS, and obtain the physical cell ID based on sequence correlation. This allows us to obtain the complete physical cell ID (such as the Physical Cell Identifier, PCI), i.e. The terminal can further adjust the frequency offset based on PSS and SSS. Then, the terminal detects the DMRS of PBCH to perform channel estimation and demodulate PBCH.

[0061] To better understand the technical solution of this application, the tracking reference signal (TRS) related to this application will be explained below.

[0062] In NR systems, TRS is used for time-frequency tracking (a more refined time-frequency synchronization than SSB), specifically for timing estimation, delay spread estimation, frequency offset estimation, and Doppler spread estimation. Timing and frequency offset estimation are used to synchronize the transmitter and receiver. The results of delay spread and Doppler spread estimation are important parameters for channel estimation, which can assist the DMRS of the Physical Downlink Control Channel (PDCCH) and Physical Downlink Shared Channel (PDSCH) to achieve more accurate channel estimation. TRS is used for connected UEs in Radio Resource Control (RRC). When a UE enters RRC connected mode, it further adjusts the time-frequency tracking performance based on the original SSB. For terminal power saving, TRS can also be used for time-frequency tracking of non-connected UEs.

[0063] A TRS is a special set of Channel State Information Reference Signal (CSI-RS) resources. For TRS deployed on low frequencies (such as FR1), a UE can configure one or more TRS resource sets. Each TRS resource set contains four CSI-RS resources, which exist in two consecutive time slots, with two CSI-RS resources in each time slot. For TRS deployed on high frequencies (such as FR2), a UE can also configure one or more TRS resource sets. A TRS resource set may contain only two CSI-RS resources in a single time slot, or it may contain four CSI-RS resources, distributed in pairs across two consecutive time slots. NR supports periodic and aperiodic TRS. For periodic TRS, the period can be selected as 2. μ • [10,20,40,80] time slots, where 2 μ It is related to the subcarrier spacing. In the frequency domain, the bandwidth of TRS can be a partial bandwidth (BWP) or a min(52, BWP).

[0064] Assuming the TRS is deployed on FR1 with a period of 20 slots and an offset of 5 slots within the period, the distribution of TRS symbols within a slot is l∈{4,8}. The deployed BWP bandwidth is 20MHz, and the subcarrier spacing (SCS) is 15kHz. Therefore, the number of resource blocks (RBs) containing TRS in the frequency domain is 52. An exemplary time-frequency mapping of the TRS is shown in Figure 2.

[0065] To better understand the technical solution of this application, the following describes the quasi-co-located (QCL) reference related to this application.

[0066] In NR systems, QCL refers to the average delay, delay spread, Doppler frequency offset, Doppler spread, and spatial reception parameters of the channel experienced by a symbol at a certain antenna port, which can be inferred from another antenna port.

[0067] NR incorporates four different types of QCL references to address various transmission scenarios. The specific QCL reference types (qcl-Type) are as follows:

[0068] 1) Type A: {Doppler frequency offset, Doppler spread, average delay, delay spread};

[0069] 2) Type B: {Doppler frequency offset, Doppler extension};

[0070] 3) Type C: {Doppler frequency offset, average time delay};

[0071] 4) TypeD: {Space Receive Parameters}.

[0072] Prior to RRC connected state, the QCL-Type A reference for PDCCH or PDSCH transmission is SSB. Once the terminal enters RRC connected state, to achieve finer time-frequency tracking performance, the network-side device can configure TRS for precise time-frequency synchronization. In this case, the QCL-Type A reference for PDCCH or PDSCH transmission is TRS.

[0073] The method for determining the QCL reference provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0074] Figure 3 is a schematic flowchart of a method 200 for determining a QCL reference according to an embodiment of this application. As shown in Figure 3, the method 200 for determining a QCL reference may include at least some of the following:

[0075] S210, the terminal determines a QCL reference for the first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0076] S220, the terminal sends or receives the first signal according to the QCL reference.

[0077] It should be understood that Figure 3 illustrates the steps or operations of method 200 for determining the QCL reference, but these steps or operations are merely examples, and other operations or variations of the operations in Figure 3 may also be performed in this application.

[0078] In the embodiments of this application, the terminal can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0079] The SSB described in the embodiments of this application can also be called any module that includes at least one of the following: synchronization signal, broadcast signal, broadcast channel (PBCH), other system message downlink broadcast channel and its control channel or control resource set or control channel search space.

[0080] The SSB described in this application is used for tracking and measuring parameters including but not limited to: timing, time delay spread, frequency offset, Doppler spread, spatial reference information, spatial related information, and spatial correlation.

[0081] The TRS described in this application embodiment is used to track channel time-frequency characteristic parameters. The TRS can be any signal used for tracking channel time-frequency characteristic parameters, such as Channel State Information-Reference Symbol (CSI-RS) resources, a set of CSI-RS resources, or other reference signals. The TRS described in this application embodiment is used for tracking and measuring parameters including, but not limited to, the following parameters: timing, time delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, and spatial correlation.

[0082] The QCL reference of the first signal described in this application embodiment can be used to obtain the channel characteristic parameters corresponding to the QCL reference of the first signal. The channel characteristic parameters include: timing, time delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, spatial correlation, etc. It should be noted that the channel characteristic parameters can be understood as the corresponding QCL parameters in the QCL reference.

[0083] Furthermore, the QCL reference of the first signal described in the embodiments of this application includes at least one of at least one SSB and at least one TRS, which can be understood as the QCL reference source corresponding to the QCL reference of the first signal (or simply the QCL reference source of the first signal) including at least one of at least one SSB and at least one TRS.

[0084] For example, the QCL reference of the first signal is at least one TRS, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal being at least one TRS.

[0085] For example, the QCL reference of the first signal is at least one SSB, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal being at least one SSB.

[0086] For example, the QCL reference of the first signal includes at least one SSB and at least one TRS, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal including at least one SSB and at least one TRS.

[0087] In some implementations, the QCL reference includes the at least one SSB, or the QCL reference includes the at least one TRS, or the QCL reference includes both the at least one SSB and the at least one TRS.

[0088] In some embodiments, the first signal may be an uplink signal or a downlink signal;

[0089] The uplink signal includes, but is not limited to, at least one of the following: Sounding Reference Signal (SRS), Physical Uplink Control Channel (PUCCH), and Physical Uplink Shared Channel (PUSCH).

[0090] The downlink signals include, but are not limited to, at least one of the following: positioning reference signals (PRS), phase tracking reference signals (PT-RS), channel state information reference signals (CSI-RS), physical downlink control channels (PDCCH), and physical downlink shared channels (PDSCH).

[0091] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0092] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0093] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0094] It should be noted that at least one TRS can also be expressed as or replaced as at least one TRS including one TRS, that is, the number of at least one TRS is 1. This application does not limit this.

[0095] It should be noted that at least one TRS includes at least two TRS, or it can be expressed as at least one TRS is at least two TRS, and the embodiments of this application are not limited in this respect.

[0096] It should be understood that a subbandwidth group can contain one or more subbandwidths.

[0097] It should be noted that each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, which can exist in the following three cases:

[0098] Case 1: Each of the at least two TRSs corresponds to at least one sub-bandwidth;

[0099] Case 2, where each of the at least two TRSs corresponds to at least one sub-bandwidth group;

[0100] Case 3: In one of the at least two TRSs, each TRS corresponds to at least one sub-bandwidth, and in the other TRS, each TRS corresponds to at least one sub-bandwidth group.

[0101] Optionally, one TRS corresponds to at least two sub-bandwidths, wherein the at least two sub-bandwidths are not contiguous, or at least some of the sub-bandwidths are not contiguous, and the at least two sub-bandwidths can be aggregated to form a large bandwidth.

[0102] Optionally, each of the at least two TRSs corresponds to at least one sub-bandwidth, which can be understood as the at least two TRSs corresponding to multiple sub-bandwidths in total. The multiple sub-bandwidths are not continuous, or at least some of the multiple sub-bandwidths are not continuous, and the multiple sub-bandwidths can be aggregated to form a large bandwidth.

[0103] Optionally, each of the at least two TRSs corresponds to at least one sub-bandwidth group, which can be understood as the at least two TRSs corresponding to multiple sub-bandwidth groups in total. The sub-bandwidths in the multiple sub-bandwidth groups are not continuous, or at least some of the sub-bandwidths in the multiple sub-bandwidth groups are not continuous. The multiple sub-bandwidth groups can be aggregated to form a large bandwidth.

[0104] Optionally, each TRS in a portion of the at least two TRSs corresponds to at least one sub-bandwidth, and each TRS in another portion of the TRSs corresponds to at least one sub-bandwidth group, wherein the sub-bandwidths corresponding to the at least two TRSs are not contiguous, or at least a portion of the sub-bandwidths corresponding to the at least two TRSs are not contiguous, and the sub-bandwidths corresponding to the at least two TRSs can be aggregated to form a large bandwidth.

[0105] The TRS sequence described in this application requires a distinction between its generation length and its occupied length. Specifically, the generation length of the TRS sequence (which can be understood as related to the TRS sequence generation formula but not to the actual frequency domain resources occupied by the TRS; alternatively, it can be understood as the potential sequence, complete sequence, full sequence, or sequence to be extracted) and the occupied length of the TRS sequence (which can be understood as related to the actual frequency domain resources occupied by the TRS, such as the number of subcarriers or resource elements (REs) actually occupied by the TRS) are both considered. The generation length of the TRS sequence is greater than or equal to the occupied length of the TRS sequence. For example, starting from a reference point, a TRS sequence of length N = 1000 is generated (i.e., the generation length of the TRS sequence is N = 1000), but the TRS actually occupies a portion of the frequency domain resources in the bandwidth, such as 500 subcarriers or REs. In this case, the occupied length of the TRS sequence is M = 500.

[0106] In some embodiments, the at least one TRS is a single TRS, wherein the sequence of the single TRS satisfies at least one of the following:

[0107] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth (i.e., at least two subbandwidths) corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the subbandwidth (i.e., at least two subbandwidths) corresponding to the TRS.

[0108] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS in the sub-bandwidth (i.e., at least two sub-bandwidths) corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS in the sub-bandwidth (i.e., at least two sub-bandwidths) corresponding to the TRS.

[0109] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the Band Width Part (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0110] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0111] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth (i.e., at least two subbandwidths) corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth (i.e., at least two subbandwidths) corresponding to the TRS.

[0112] In this embodiment, the generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the subbandwidth corresponding to the TRS. Thus, the generation length of the sequence of a TRS can be determined based on the number of subcarriers or REs occupied by the subbandwidth corresponding to the TRS.

[0113] In this embodiment, the generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to the TRS. Therefore, the generation length of the sequence of a TRS can be determined based on the number of subcarriers or REs actually occupied by the TRS on the sub-bandwidth corresponding to the TRS.

[0114] In this embodiment, the generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the BWP where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located. Thus, the generation length of the sequence of a TRS can be determined based on the number of subcarriers or REs occupied by the BWP where the TRS is located.

[0115] In this embodiment, since the interval bandwidth between each sub-bandwidth corresponding to a TRS is unusable, unallocated, or unauthorized bandwidth, no sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS, thereby ensuring the validity of the generated sequence of the TRS.

[0116] In this embodiment, the starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS, so that the sequence of the TRS can be generated based on the starting reference point.

[0117] In some implementations, the starting reference point for generating the sequence of a TRS can also be the first subcarrier of the common resource block CRB#0, or the starting reference point for generating the sequence of a TRS can also be the first RE of the common resource block CRB#0, or the starting reference point for generating the sequence of a TRS can also be the first subcarrier of the first BWP where the TRS is located, or the starting reference point for generating the sequence of a TRS can also be the first RE of the first BWP where the TRS is located.

[0118] In some embodiments, the at least one TRS comprises at least two TRSs, wherein the sequence of each of the at least two TRSs satisfies at least one of the following:

[0119] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth (i.e., at least one subbandwidth) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth (i.e., at least one subbandwidth) corresponding to each TRS.

[0120] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS.

[0121] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS in the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS in the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS.

[0122] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS in the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS in the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS.

[0123] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0124] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0125] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth (i.e., at least one subbandwidth) corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth (i.e., at least one subbandwidth) corresponding to each TRS.

[0126] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS.

[0127] In this embodiment, the generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS. Thus, the generation length of the sequence of each TRS can be determined based on the number of subcarriers or REs occupied by the sub-bandwidth corresponding to each TRS.

[0128] In this embodiment, the generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group (i.e., at least one subbandwidth group) corresponding to each TRS. Thus, the generation length of the sequence of each TRS can be determined based on the number of subcarriers or REs occupied by the subbandwidth group corresponding to each TRS.

[0129] In this embodiment, the generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth (i.e., at least one sub-bandwidth) corresponding to each TRS. Thus, the generation length of the sequence of each TRS can be determined based on the number of subcarriers or REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0130] In this embodiment, the generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS in the sub-bandwidth group (i.e., at least one sub-bandwidth group) corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS in the sub-bandwidth group (i.e., at least one sub-bandwidth group) corresponding to each TRS. Thus, the generation length of the sequence of each TRS can be determined based on the number of subcarriers or REs actually occupied by the TRS in the sub-bandwidth group corresponding to each TRS.

[0131] In this embodiment, since the interval bandwidth between each sub-bandwidth corresponding to at least two TRS is unusable, unallocated, or unauthorized bandwidth, no sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRS, thereby ensuring the validity of the generated sequence of each TRS.

[0132] In this embodiment, since the interval bandwidth between each sub-bandwidth group corresponding to at least two TRS is unusable, unallocated, or unauthorized bandwidth, no sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, thereby ensuring the validity of the generated sequence of each TRS.

[0133] In this embodiment, the starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS, so that the sequence of each TRS can be generated based on the starting reference point.

[0134] In this embodiment, the starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS, so that the sequence of each TRS can be generated based on the starting reference point.

[0135] In some implementations, the starting reference point for generating the sequence of each TRS can also be the first subcarrier of the common resource block CRB#0, or the starting reference point for generating the sequence of each TRS can also be the first RE of the common resource block CRB#0, or the starting reference point for generating the sequence of each TRS can also be the first subcarrier of the first BWP where each TRS is located, or the starting reference point for generating the sequence of each TRS can also be the first RE of the first BWP where each TRS is located.

[0136] In some embodiments, the method 200 for determining the QCL reference further includes:

[0137] When one TRS corresponds to at least two sub-bandwidths, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the one TRS on each of the at least two sub-bandwidths; or...

[0138] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS in the at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0139] Optionally, the channel characteristic parameters include: timing, delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, spatial correlation, etc.

[0140] In this embodiment, when one TRS corresponds to at least two sub-bandwidths, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the TRS in each of the at least two sub-bandwidths. That is, it measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the part of the TRS corresponding to the one TRS in each sub-bandwidth, thereby obtaining the channel characteristic parameters corresponding to the QCL reference of the first signal.

[0141] In this embodiment, when each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the corresponding TRS for each at least one sub-bandwidth or at least one sub-bandwidth group. That is, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the corresponding part of the TRS for each sub-bandwidth or sub-bandwidth group, thereby obtaining the channel characteristic parameters corresponding to the QCL reference of the first signal.

[0142] It should be noted that within a sub-bandwidth, the frequency domain resources occupied by TRS can be continuous or equally spaced, thereby ensuring the measurement performance of timing and / or delay.

[0143] In some embodiments, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the one TRS on each of the at least two sub-bandwidths, including at least one of the following:

[0144] The terminal measures at least one of timing and delay on at least one of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay.

[0145] The terminal measures at least one of timing and delay on the largest sub-bandwidth of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay.

[0146] The terminal measures at least one of frequency offset and Doppler spread on at least one of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and Doppler spread;

[0147] The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two sub-bandwidths (in this case, it is assumed that the corresponding channel characteristics of each sub-bandwidth are significantly different, or that the corresponding QCL parameters of each sub-bandwidth are significantly different).

[0148] In some embodiments, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS, at least one of the following, on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS:

[0149] The terminal measures at least one of timing and delay on at least one of the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay.

[0150] The terminal measures at least one of timing and delay on the TRS with the largest sub-bandwidth or the TRS with the largest sub-bandwidth group (i.e., the TRS with the largest occupied bandwidth or the largest total bandwidth) among the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay.

[0151] The terminal measures at least one of frequency offset and Doppler spread on at least one of the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and Doppler spread;

[0152] The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two TRSs (in this case, it is assumed that the channel characteristics measured by each TRS are significantly different, or that the QCL parameters measured by each TRS are significantly different).

[0153] In some embodiments, the at least one TRS is a single TRS, wherein the single TRS satisfies at least one of the following on each corresponding sub-bandwidth:

[0154] Same time domain location;

[0155] Same frequency domain density;

[0156] Same frequency domain offset;

[0157] The occupied REs are kept at a uniform interval (e.g., the RE interval of TRS on each sub-bandwidth is 3);

[0158] The transmission power is the same (e.g., the transmission power is the same on each RE);

[0159] Associate with the same port.

[0160] In some embodiments, the at least one TRS comprises at least two TRSs, wherein the at least two TRSs satisfy at least one of the following on corresponding sub-bandwidths or sub-bandwidth groups:

[0161] Same time domain location;

[0162] Same frequency domain density;

[0163] Same frequency domain offset;

[0164] The occupied REs are kept at a uniform interval (e.g., the RE interval of TRS on each sub-bandwidth is 3);

[0165] The transmission power is the same (e.g., the transmission power is the same on each RE);

[0166] Associate with the same port.

[0167] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0168] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0169] The at least one SSB includes at least one of Cell Defining SSB (CD-SSB) and Non-cell Defining SSB (NCD-SSB);

[0170] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0171] For example, when the QCL reference of the first signal includes multiple SSBs, it can be agreed by agreement that the QCL reference of the first signal includes at least one CD-SSB, or it can be agreed by agreement that the QCL reference of the first signal includes at least one NCD-SSB.

[0172] It should be noted that each SSB in the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group, and the following three situations may exist:

[0173] Case 1: Each of the at least one SSB corresponds to a sub-bandwidth;

[0174] Case 2: Each of the at least one SSB corresponds to a sub-bandwidth group;

[0175] Case 3: In one part of the at least one SSB, each SSB corresponds to a sub-bandwidth, and in another part of the SSBs, each SSB corresponds to a sub-bandwidth group.

[0176] In this embodiment, each SSB in at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group, and at least one SSB may correspond to at least one sub-bandwidth or at least one sub-bandwidth group; wherein, at least one sub-bandwidth is not continuous with each other, or at least some of the sub-bandwidths in at least one sub-bandwidth are not continuous with each other, and the at least one sub-bandwidth can be aggregated into a large bandwidth; or, at least one sub-bandwidth group is not continuous with each other, or at least some of the sub-bandwidths in at least one sub-bandwidth group are not continuous with each other, and the sub-bandwidths in at least one sub-bandwidth group can be aggregated into a large bandwidth.

[0177] It should be noted that "before TRS is activated" can also be referred to as "before TRS is enabled," "before TRS is transmitted," "before TRS is received," or "before TRS is measured," and this application does not limit it in this way.

[0178] In some embodiments, the second SSB satisfies at least one of the following:

[0179] There is an association between the first SSB and the second SSB;

[0180] The first SSB indicates relevant information about the second SSB (such as the sub-bandwidth corresponding to the second SSB);

[0181] The agreement specifies the relevant information of the second SSB corresponding to the first SSB (such as the sub-bandwidth corresponding to the second SSB);

[0182] The terminal completes the measurement of the second SSB before the first time reference point.

[0183] Optionally, the first time reference point includes, but is not limited to, one of the following:

[0184] The time point at which random access is initiated;

[0185] The time point at which random access is completed;

[0186] The point in time when the RRC connection is established;

[0187] The timing of TRS enablement;

[0188] The time point of TRS transmission.

[0189] Optionally, the association between the first SSB and the second SSB can be agreed upon by a protocol, or the association between the first SSB and the second SSB can be configured by the network side.

[0190] Optionally, the first time reference point can be agreed upon by the protocol, or the first time reference point can be configured by the network side.

[0191] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0192] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0193] At least some of the TRS in the at least one TRS have different QCL references;

[0194] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0195] Optionally, the second signal can be an SSB or a CSI-RS.

[0196] For example, if the QCL reference of at least a portion of the at least one TRS is the SSB, the other portions of the TRS may not use the SSB as the QCL reference, i.e., they may have no QCL reference.

[0197] For example, when at least some of the TRS in the at least one TRS have different QCL references, the QCL references corresponding to the TRS on different sub-bandwidths are different SSBs.

[0198] For example, in the case where a TRS corresponds to at least two sub-bandwidths, each of the at least two sub-bandwidths may correspond to a different QCL reference, or some of the sub-bandwidths may correspond to different QCL references.

[0199] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0200] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0201] The at least one SSB and the at least one TRS have a QCL relationship.

[0202] For example, one sub-bandwidth corresponds to SSB, and the other sub-bandwidths correspond to TRS.

[0203] In some embodiments, the method 200 for determining the QCL reference further includes:

[0204] The terminal receives an indication of at least one Transmission Configuration Indicator (TCI) status.

[0205] The at least one TCI state is used to indicate the QCL reference.

[0206] For example, a network-side device may indicate the at least one TCI state by at least one of the following:

[0207] Radio Resource Control (RRC), Media Access Control Control Element (MAC CE), and Downlink Control Information (DCI).

[0208] For example, network-side devices configure or indicate a TCI status list via RRC, and network-side devices indicate the activation of at least one TCI status in the TCI status list via MAC CE.

[0209] For example, network-side devices configure or indicate a TCI status list via RRC, and network-side devices indicate the activation of at least one TCI status in the TCI status list via DCI.

[0210] For example, network-side devices may configure or indicate a TCI status list via RRC, the TCI status list including at least one TCI status.

[0211] For example, the TCI status corresponding to different sub-bandwidths can be indicated by different signaling, such as DCI (dynamic) on sub-bandwidth 1 and RRC (semi-static) on sub-bandwidth 2.

[0212] In some embodiments, the at least one TCI state satisfies any of the following:

[0213] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference indicated by the TCI state includes at least one of the at least one SSB and the at least one TRS (e.g., multiple SSBs correspond to multiple sub-bandwidths, or multiple TRSs correspond to multiple sub-bandwidths).

[0214] The at least one TCI state includes at least two TCI states, each of the at least two TCI states corresponding to a sub-bandwidth or a sub-bandwidth group (e.g., the QCL reference for each sub-bandwidth can be indicated individually, or the QCL reference for each sub-bandwidth group can be indicated individually; for example, a TCI state indicates the QCL reference on a sub-bandwidth group (which may not be all the sub-bandwidths)).

[0215] It should be noted that each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group, and there can be three possible scenarios:

[0216] Case 1: Each of the at least two TCI states corresponds to a sub-bandwidth;

[0217] Case 2: Each of the at least two TCI states corresponds to a sub-bandwidth group;

[0218] Case 3: In one part of the at least two TCI states, each TCI state corresponds to a sub-bandwidth, and in the other part, each TCI state corresponds to a sub-bandwidth group.

[0219] In this application embodiment, a QCL reference scheme based on TRS and / or SSB is designed for high bandwidth scenarios, thereby effectively ensuring signal transmission performance in high bandwidth scenarios and reducing the measurement complexity of the terminal.

[0220] The terminal-side embodiments of this application have been described in detail above with reference to Figure 3. The network-side embodiments of this application have been described in detail below with reference to Figure 4. It should be understood that the network-side embodiments correspond to the terminal-side embodiments, and similar descriptions can be referred to the terminal-side embodiments.

[0221] Figure 4 is a schematic flowchart of a method 300 for determining a QCL reference according to an embodiment of this application. As shown in Figure 4, the method 300 for determining a QCL reference may include at least some of the following:

[0222] S310, the network-side device determines a QCL reference for the first signal, wherein the QCL reference includes at least one of at least one SSB and at least one TRS;

[0223] S320, the network-side device receives or sends the first signal according to the QCL reference.

[0224] It should be understood that Figure 4 illustrates the steps or operations of method 300 for determining the QCL reference, but these steps or operations are merely examples, and other operations or variations of the operations in Figure 4 may also be performed in this application.

[0225] In the embodiments of this application, the network-side device can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0226] The SSB described in this application embodiment can also be called any module that includes at least one of the following: synchronization signal, broadcast signal, broadcast channel (PBCH), other system message downlink broadcast channel and its control channel or control resource set or control channel search space. The SSB described in this application embodiment is used for tracking and measuring parameters including but not limited to: timing, delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, spatial correlation, etc.

[0227] The TRS described in this application embodiment is used to track channel time-frequency characteristic parameters. The TRS can be any signal used to track channel time-frequency characteristic parameters, such as CSI-RS resources, CSI-RS resource sets, or other reference signals. The TRS described in this application embodiment is used for tracking and measuring parameters including but not limited to: timing, time delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, and spatial correlation.

[0228] The QCL reference of the first signal described in this application embodiment can be used to obtain the channel characteristic parameters corresponding to the QCL reference of the first signal. The channel characteristic parameters include: timing, time delay spread, frequency offset, Doppler spread, spatial reference information, spatially related information, spatial correlation, etc. It should be noted that the channel characteristic parameters can be understood as the corresponding QCL parameters in the QCL reference.

[0229] Furthermore, the QCL reference of the first signal described in the embodiments of this application includes at least one of at least one SSB and at least one TRS, which can be understood as the QCL reference source corresponding to the QCL reference of the first signal (or simply the QCL reference source of the first signal) including at least one of at least one SSB and at least one TRS.

[0230] For example, the QCL reference of the first signal is at least one TRS, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal being at least one TRS.

[0231] For example, the QCL reference of the first signal is at least one SSB, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal being at least one SSB.

[0232] For example, the QCL reference of the first signal includes at least one SSB and at least one TRS, which can also be understood as the QCL reference source corresponding to the QCL reference of the first signal including at least one SSB and at least one TRS.

[0233] In some implementations, the QCL reference includes the at least one SSB, or the QCL reference includes the at least one TRS, or the QCL reference includes both the at least one SSB and the at least one TRS.

[0234] In some embodiments, the first signal may be an uplink signal or a downlink signal;

[0235] The uplink signals include, but are not limited to, at least one of the following: SRS, PUCCH, PUSCH;

[0236] The downlink signals include, but are not limited to, at least one of the following: PRS, PT-RS, CSI-RS, PDCCH, and PDSCH.

[0237] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0238] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0239] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0240] In some embodiments, the sequence of a TRS satisfies at least one of the following:

[0241] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the subbandwidth corresponding to the TRS.

[0242] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS.

[0243] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the BWP where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0244] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0245] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

[0246] In some embodiments, the sequence of each of the at least two TRSs satisfies at least one of the following:

[0247] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS;

[0248] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS.

[0249] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0250] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS.

[0251] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0252] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0253] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS;

[0254] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

[0255] In some embodiments, the method 300 for determining the QCL reference further includes:

[0256] The network-side device sends the one TRS or the at least two TRS;

[0257] When one TRS corresponds to at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS on each of the at least two sub-bandwidths.

[0258] or,

[0259] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0260] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS measurement on each of the at least two sub-bandwidths, including at least one of the following:

[0261] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two sub-bandwidths;

[0262] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on the largest sub-bandwidth among the at least two sub-bandwidths;

[0263] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two sub-bandwidths;

[0264] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two sub-bandwidths (in this case, it is assumed that the channel characteristics corresponding to each sub-bandwidth are significantly different, or that the QCL parameters corresponding to each sub-bandwidth are significantly different).

[0265] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS, including at least one of the following:

[0266] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two TRSs;

[0267] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein at least one of the timing and delay is measured by the terminal on the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group in the at least two TRSs;

[0268] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two TRSs;

[0269] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two TRSs (in this case, it is assumed that the channel characteristics measured by each TRS are significantly different, or that the QCL parameters measured by each TRS are significantly different).

[0270] In some embodiments, the at least one TRS is a single TRS, wherein the single TRS satisfies at least one of the following on each corresponding sub-bandwidth:

[0271] Same time domain location;

[0272] Same frequency domain density;

[0273] Same frequency domain offset;

[0274] The occupied REs are kept at a uniform interval (e.g., the RE interval of TRS on each sub-bandwidth is 3);

[0275] The transmission power is the same (e.g., the transmission power is the same on each RE);

[0276] Associate with the same port.

[0277] In some embodiments, the at least one TRS comprises at least two TRSs, wherein the at least two TRSs satisfy at least one of the following on corresponding sub-bandwidths or sub-bandwidth groups:

[0278] Same time domain location;

[0279] Same frequency domain density;

[0280] Same frequency domain offset;

[0281] The occupied REs are kept at a uniform interval (e.g., the RE interval of TRS on each sub-bandwidth is 3);

[0282] The transmission power is the same (e.g., the transmission power is the same on each RE);

[0283] Associate with the same port.

[0284] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0285] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0286] The at least one SSB includes at least one of CD-SSB and NCD-SSB;

[0287] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0288] For example, when the QCL reference of the first signal includes multiple SSBs, it can be agreed by agreement that the QCL reference of the first signal includes at least one CD-SSB, or it can be agreed by agreement that the QCL reference of the first signal includes at least one NCD-SSB.

[0289] It should be noted that each SSB in the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group, and the following three situations may exist:

[0290] Case 1: Each of the at least one SSB corresponds to a sub-bandwidth;

[0291] Case 2: Each of the at least one SSB corresponds to a sub-bandwidth group;

[0292] Case 3: In one part of the at least one SSB, each SSB corresponds to a sub-bandwidth, and in another part of the SSBs, each SSB corresponds to a sub-bandwidth group.

[0293] In this embodiment, each SSB in at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group, and at least one SSB may correspond to at least one sub-bandwidth or at least one sub-bandwidth group; wherein, at least one sub-bandwidth is not continuous with each other, or at least some of the sub-bandwidths in at least one sub-bandwidth are not continuous with each other, and the at least one sub-bandwidth can be aggregated into a large bandwidth; or, at least one sub-bandwidth group is not continuous with each other, or at least some of the sub-bandwidths in at least one sub-bandwidth group are not continuous with each other, and the sub-bandwidths in at least one sub-bandwidth group can be aggregated into a large bandwidth.

[0294] It should be noted that "before TRS is activated" can also be referred to as "before TRS is enabled," "before TRS is transmitted," "before TRS is received," or "before TRS is measured," and this application does not limit it in this way.

[0295] In some embodiments, the second SSB satisfies at least one of the following:

[0296] There is an association between the first SSB and the second SSB;

[0297] The first SSB indicates relevant information about the second SSB;

[0298] The agreement specifies the relevant information of the second SSB corresponding to the first SSB;

[0299] The terminal completes the measurement of the second SSB before the first time reference point.

[0300] Optionally, the first time reference point includes, but is not limited to, one of the following:

[0301] The time point at which random access is initiated;

[0302] The time point at which random access is completed;

[0303] The point in time when the RRC connection is established;

[0304] The timing of TRS enablement;

[0305] The time point of TRS transmission.

[0306] Optionally, the association between the first SSB and the second SSB can be agreed upon by a protocol, or the association between the first SSB and the second SSB can be configured by the network side.

[0307] Optionally, the first time reference point can be agreed upon by the protocol, or the first time reference point can be configured by the network side.

[0308] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0309] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0310] At least some of the TRS in the at least one TRS have different QCL references;

[0311] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0312] Optionally, the second signal can be an SSB or a CSI-RS.

[0313] For example, if the QCL reference of at least a portion of the at least one TRS is the SSB, the other portions of the TRS may not use the SSB as the QCL reference, i.e., they may have no QCL reference.

[0314] For example, when at least some of the TRS in the at least one TRS have different QCL references, the QCL references corresponding to the TRS on different sub-bandwidths are different SSBs.

[0315] For example, in the case where a TRS corresponds to at least two sub-bandwidths, each of the at least two sub-bandwidths may correspond to a different QCL reference, or some of the sub-bandwidths may correspond to different QCL references.

[0316] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0317] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0318] The at least one SSB and the at least one TRS have a QCL relationship.

[0319] In some embodiments, the method 300 for determining the QCL reference further includes:

[0320] The network-side device indicates at least one TCI status;

[0321] The at least one TCI state is used to indicate the QCL reference.

[0322] For example, a network-side device may indicate the at least one TCI state by at least one of the following:

[0323] RRC, MAC CE, DCI.

[0324] For example, network-side devices configure or indicate a TCI status list via RRC, and network-side devices indicate the activation of at least one TCI status in the TCI status list via MAC CE.

[0325] For example, network-side devices configure or indicate a TCI status list via RRC, and network-side devices indicate the activation of at least one TCI status in the TCI status list via DCI.

[0326] For example, network-side devices may configure or indicate a TCI status list via RRC, the TCI status list including at least one TCI status.

[0327] For example, the TCI status corresponding to different sub-bandwidths can be indicated by different signaling, such as DCI (dynamic) on sub-bandwidth 1 and RRC (semi-static) on sub-bandwidth 2.

[0328] In some embodiments, the at least one TCI state satisfies any of the following:

[0329] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference in the TCI state includes at least one of the at least one SSB and the at least one TRS (for example, multiple SSBs correspond to multiple sub-bandwidths, or multiple TRSs correspond to multiple sub-bandwidths).

[0330] The at least one TCI state includes at least two TCI states, each of the at least two TCI states corresponding to a sub-bandwidth or a sub-bandwidth group (e.g., the QCL reference for each sub-bandwidth can be indicated individually, or the QCL reference for each sub-bandwidth group can be indicated individually; for example, a TCI state indicates the QCL reference on a sub-bandwidth group (which may not be all the sub-bandwidths)).

[0331] It should be noted that each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group, and there can be three possible scenarios:

[0332] Case 1: Each of the at least two TCI states corresponds to a sub-bandwidth;

[0333] Case 2: Each of the at least two TCI states corresponds to a sub-bandwidth group;

[0334] Case 3: In one part of the at least two TCI states, each TCI state corresponds to a sub-bandwidth, and in the other part, each TCI state corresponds to a sub-bandwidth group.

[0335] In this application embodiment, a QCL reference scheme based on TRS and / or SSB is designed for high bandwidth scenarios, thereby effectively ensuring signal transmission performance in high bandwidth scenarios and reducing the measurement complexity of the terminal.

[0336] The technical solutions of this application are described below through Examples 1 to 4.

[0337] Example 1 details the technical solution of this application using the frequency domain resource mapping of TRS (which can also be understood as the frequency domain resource mapping of TRS sequences) as an example.

[0338] Assuming there are multiple sub-bandwidths that together form a large bandwidth, which is used for signal scheduling and transmission, then the mapping of TRS (e.g., a TRS resource or a set of resources) can be done in the following two ways:

[0339] 1) The first method is: one TRS corresponds to multiple sub-bandwidths, that is, one TRS spans multiple sub-bandwidths;

[0340] 2) The second method is: one TRS corresponds to one sub-bandwidth, or one TRS corresponds to one sub-bandwidth group, that is, multiple sub-bandwidths correspond to multiple TRS.

[0341] For the first approach, a single TRS can occupy multiple sub-bandwidths, as shown in Figure 5. One TRS occupies three sub-bandwidths, with the interval bandwidth between each sub-bandwidth being unusable bandwidth. Therefore, the TRS only maps within the effective bandwidth of the sub-bandwidths.

[0342] In Figure 5, the TRS sequence generation starts from sub-bandwidth 1. It can be the first subcarrier of the sub-bandwidth or the first subcarrier actually occupied by the TRS on sub-bandwidth 1 (i.e., the first subcarrier of the TRS). Since the TRS does not occupy the interval bandwidth between sub-bandwidths, the generated length of the TRS sequence is equal to the total number of subcarriers occupied by the three sub-bandwidths, or the generated length of the TRS sequence is equal to the total number of subcarriers actually occupied by the TRS on the three sub-bandwidths. Of course, the TRS sequence length can also be equal to the number of subcarriers occupied by the BWP where the TRS resides; for example, the BWP where the TRS resides can be the downlink bandwidth in Figure 5.

[0343] For the second method, one TRS can occupy one sub-bandwidth, as shown in Figure 6. The three TRS each occupy three sub-bandwidths, with the interval bandwidth between each sub-bandwidth being unusable bandwidth. Therefore, the three TRS are only mapped on the effective bandwidth of the sub-bandwidths.

[0344] Of course, some TRSs can correspond to multiple sub-bandwidths, while others can correspond to only one sub-bandwidth, as shown in Figure 7. Two TRSs occupy a total of three sub-bandwidths, with TRS1 corresponding to one sub-bandwidth and TRS2 corresponding to two sub-bandwidths. It should be noted that the number of sub-bandwidths a TRS corresponds to can be configured via signaling, or the protocol can default to specifying which sub-bandwidths correspond to the same TRS.

[0345] In Figure 6, the sequence generation of each TRS can begin from the first subcarrier (i.e., the starting subcarrier) of the sub-bandwidth corresponding to each TRS, or each TRS can begin from the first subcarrier actually occupied by the TRS on the sub-bandwidth corresponding to each TRS (i.e., the first subcarrier of the TRS). Since the three TRS do not occupy the interval bandwidth between the sub-bandwidths, the generation length of the TRS sequence is equal to the subcarrier occupied by the sub-bandwidth corresponding to the TRS, or the generation length of the TRS sequence is equal to the subcarrier actually occupied by the TRS on the sub-bandwidth corresponding to the TRS.

[0346] In Figure 7, the sequence generation of TRS1 starts from the first subcarrier (i.e., the starting subcarrier) of sub-bandwidth 1 corresponding to TRS1, or the sequence generation of TRS1 starts from the first subcarrier actually occupied by TRS on sub-bandwidth 1 corresponding to TRS1 (i.e., the first subcarrier of TRS). Since TRS2 corresponds to a sub-bandwidth group (i.e., sub-bandwidth 2 and sub-bandwidth 3), the sequence generation of TRS2 starts from the first subcarrier (i.e., the starting subcarrier) of sub-bandwidth 2 (i.e., the sub-bandwidth with a relatively small frequency domain) corresponding to TRS2 (which can also be understood as starting from the first subcarrier of this sub-bandwidth group), or the sequence generation of TRS2 starts from the first subcarrier actually occupied by TRS on sub-bandwidth 2 corresponding to TRS2 (i.e., the first subcarrier of TRS). Therefore, the generation length of the TRS1 sequence is equal to the subcarrier occupied by the subbandwidth corresponding to TRS1, and the generation length of the TRS2 sequence is equal to the subcarrier occupied by the subbandwidth corresponding to TRS2; or, the generation length of the TRS1 sequence is equal to the subcarrier actually occupied by TRS on the subbandwidth corresponding to TRS1, and the generation length of the TRS2 sequence is equal to the subcarrier actually occupied by TRS on the subbandwidth corresponding to TRS2.

[0347] In summary, the TRS sequence generation methods described above can effectively reduce the complexity of TRS sequence generation. Especially for high-bandwidth scenarios, if the interval between two discrete sub-bandwidths is large, TRS cannot be transmitted on the unusable interval bandwidth between the discrete sub-bandwidths. However, generating TRS sequences on the interval bandwidth would increase complexity and waste computational resources. Therefore, the above examples provide two TRS sequence generation methods to address this problem.

[0348] Example 2 details the technical solution of this application using a TRS-based QCL reference as an example.

[0349] In high-bandwidth scenarios, if the first signal (in this embodiment, PDCCH or PDSCH is used as an example) is transmitted over the high bandwidth, then QCL reference information (e.g., timing, delay spread, frequency offset, Doppler spread, spatial reference information, etc.) needs to be obtained in advance to correctly receive PDCCH or PDSCH. Generally, in RRC connected state, to obtain more accurate channel time-frequency characteristics, the network-side device enables TRS, allowing the terminal to perform TRS measurements and estimate the relevant channel time-frequency characteristics or QCL reference information. Therefore, this embodiment provides a QCL reference method for high bandwidth consisting of multiple sub-bandwidths.

[0350] Assuming there are three sub-bandwidths, to obtain the channel time-frequency characteristics across these three sub-bandwidths, TRS transmits across all three sub-bandwidths. PDSCH, on the other hand, can flexibly schedule its frequency domain resources across these three sub-bandwidths, occupying either all three or only a portion, such as two sub-bandwidths. Furthermore, if the bandwidth of the PDCCH or its associated control resource set (CORESET) is small, it can even occupy only the frequency domain resources of one sub-bandwidth.

[0351] Below is an example where TRS occupies 3 sub-bandwidths and PDSCH occupies 3 sub-bandwidths.

[0352] In Figure 8, although the PDSCH occupies three sub-bandwidths, its corresponding frequency domain resources do not occupy all the resource blocks (RBs) of the three sub-bandwidths, but only a portion of them. This depends on the flexible scheduling on the network side. In this case, the QCL reference can be one of the following:

[0353] The first method: For the entire PDSCH, the PDSCH corresponding to each of the three sub-bandwidths can be used as QCL references with the TRS of each of the three sub-bandwidths. In this case, the terminal can measure the QCL parameters (timing, delay spread, frequency offset, Doppler spread, etc.) of each of the three sub-bandwidths based on the TRS of each of the three sub-bandwidths. The PDSCH channel estimation and demodulation of PDSCH are performed by using the QCL parameters (timing, delay spread, frequency offset, Doppler spread, etc.) of each of the three sub-bandwidths.

[0354] The second approach: For the entire PDSCH, the PDSCH corresponding to each of the three sub-bandwidths can jointly reference some QCL parameters provided by the TRS on the three sub-bandwidths, and individually reference other QCL parameters provided by the TRS on the three sub-bandwidths respectively. For example, the PDSCH corresponding to each of the three sub-bandwidths can refer to at least one of the timing and delay spreads provided by the TRS on the three sub-bandwidths respectively. At the same time, the PDSCH corresponding to the three sub-bandwidths can jointly reference at least one of the frequency offset and Doppler spreads provided by the TRS on the three sub-bandwidths (i.e., at least one of the frequency offset and Doppler spreads is measured jointly based on the TRS on the three sub-bandwidths, such as averaging the measurement results of the TRS on the three sub-bandwidths). Similarly, other QCL reference forms are also possible, which will not be elaborated here.

[0355] Regarding the PDCCH case, in some situations, due to the small bandwidth of the PDCCH, it may only occupy one sub-bandwidth. As shown in Figure 9, the PDCCH only occupies a portion of the RB in sub-bandwidth 2, while the PDSCH scheduled by the PDCCH occupies three sub-bandwidths.

[0356] In Figure 9, the QCL reference of PDCCH can be the TRS on sub-bandwidth 2, or it can be the TRS on all three sub-bandwidths, while the QCL reference of PDSCH can also be the TRS on all three sub-bandwidths. Therefore, for the case of unified TCI, the QCL references of PDSCH and PDCCH can be handled separately.

[0357] Furthermore, regarding the scenario in Figure 9, if a default QCL reference occurs, then the QCL reference or part of the QCL reference for the PDSCH can be the PDCCH. Alternatively, by default, such scheduling is not allowed, meaning the sub-bandwidth occupied by the PDSCH must be less than that of the PDCCH, thus ensuring the correctness of the default QCL reference.

[0358] Example 3 details the technical solution of this application using a non-TRS-based QCL reference as an example.

[0359] Example 2 described QCL reference when TRS is enabled on the network side. This example mainly describes the design of QCL reference for large bandwidth when TRS is not enabled. When TRS is not enabled, QCL reference can be based on SSB.

[0360] In Figure 10 below, it is assumed that the terminal accesses the network on sub-bandwidth 2 during the initial access phase and selects SSB1 as the assumption for initiating random access, i.e., SSB1 serves as the QCL reference for random access-related signals. However, during the random access phase, or after random access is completed, if the network side does not enable TRS, or if the QCL or TCI indication based on TRS has not been enabled or activated, the terminal still needs to rely on SSB when receiving PDSCH.

[0361] In Figure 10, assuming the PDSCH occupies three sub-bandwidths, to ensure PDSCH transmission performance across these three sub-bandwidths, the terminal can measure SSB2 and SSB3 as supplementary measurements to obtain the channel time-frequency characteristics on sub-bandwidths 1 and 3. SSB2 and SSB3 can be NCD-SSBs. The PDSCH on these three sub-bandwidths can use each of the three SSBs as a QCL reference. Alternatively, only some QCL parameters can be measured on SSB2 and SSB3, reducing the terminal's measurement complexity. For example, only at least one of timing and delay spread can be measured on SSB2 and SSB3. At least one of frequency offset and Doppler spread in the PDSCH QCL reference can come from SSB1. Alternatively, all three sub-bandwidths of PDSCH can use SSB1 as the QCL reference, requiring the terminal to measure SSB2 and SSB3 to obtain the QCL parameters.

[0362] Example 4 details the technical solution of this application using an SSB-based or TRS-based QCL reference as an example.

[0363] Besides the QCL reference methods based on SSB or TRS as shown in Examples 2 and 3, in some cases both SSB and TRS can be used as QCL references. One advantage of this is reduced measurement complexity for the terminal. For example, as shown in Figure 11, assume that during the initial access phase, the terminal accesses the network on sub-bandwidth 2 and selects SSB1 as the assumption for initiating random access; that is, SSB1 serves as the QCL reference for random access related signals. After the terminal enters the RRC connected state, the network enables TRS, and PDSCH occupies three sub-bandwidths. At this time, TRS does not need to be configured on sub-bandwidth 2; only TRS transmission on sub-bandwidths 1 and 3 is required.

[0364] In this scenario, the PDSCH on sub-bandwidth 2 can use SSB1 as the QCL reference, while the PDSCHs on sub-bandwidth 1 and sub-bandwidth 3 can use TRS as the QCL reference; alternatively, the PDSCHs on all three sub-bandwidths can use both SSB1 and TRS as their QCL references, or partially as their QCL references. In this case, a QCL reference in a TCI state can indicate both SSB and TRS as QCL reference sources, or only TRS as the QCL reference. The QCL reference based on SSB1 on sub-bandwidth 2 does not require TCI state indication; the protocol defaults to using SSB1 as the QCL reference for the PDSCH on sub-bandwidth 2.

[0365] The method for determining a QCL reference provided in this application can be executed by a device for determining a QCL reference. This application uses an example of a device for determining a QCL reference executing the method to illustrate the device for determining a QCL reference provided in this application.

[0366] This application provides an apparatus for determining a QCL reference. As an example, the apparatus for determining the QCL reference can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0367] The apparatus for determining the QCL reference includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0368] Specifically, referring to Figure 12, when the device for determining the QCL reference is a terminal or a component in the terminal, the device 400 for determining the QCL reference includes: a processing module 401, a transmitting module 402, and a receiving module 403.

[0369] The processing module 401 is used to determine the quasi-co-located QCL reference of the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block SSB and at least one tracking reference signal TRS;

[0370] The transmitting module 402 is used to transmit the first signal according to the QCL reference, or the receiving module 403 is used to receive the first signal according to the QCL reference.

[0371] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0372] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0373] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0374] In some embodiments, the sequence of a TRS satisfies at least one of the following:

[0375] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS.

[0376] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS.

[0377] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0378] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0379] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

[0380] In some embodiments, the sequence of each of the at least two TRSs satisfies at least one of the following:

[0381] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS;

[0382] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS.

[0383] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0384] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS.

[0385] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0386] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0387] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS;

[0388] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

[0389] In some embodiments, when the one TRS corresponds to at least two sub-bandwidths, the processing module 401 is further configured to measure, based on the one TRS, the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two sub-bandwidths; or...

[0390] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the processing module 401 is further configured to measure the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS in the at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0391] In some embodiments, the processing module 401 is specifically configured to perform at least one of the following:

[0392] On at least one of the at least two sub-bandwidths, at least one of timing and delay is measured, wherein the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0393] On the largest of the at least two sub-bandwidths, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0394] On at least one of the at least two sub-bandwidths, at least one of frequency offset and Doppler spread is measured, wherein the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the frequency offset and the Doppler spread;

[0395] In each of the at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured.

[0396] In some embodiments, the processing module 401 is specifically configured to perform at least one of the following:

[0397] On at least one of the at least two TRSs, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0398] On the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group among the at least two TRSs, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0399] On at least one of the at least two TRSs, at least one of frequency offset and Doppler spread is measured, wherein the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and the Doppler spread.

[0400] On each of the at least two TRSs, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured.

[0401] In some embodiments, the one TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths:

[0402] Same time domain location;

[0403] Same frequency domain density;

[0404] Same frequency domain offset;

[0405] The occupied REs are kept at uniform intervals;

[0406] Same transmission power;

[0407] Associate with the same port.

[0408] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0409] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0410] The at least one SSB includes at least one of Cell Defined SSB (CD-SSB) and Non-Cell Defined SSB (NCD-SSB);

[0411] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the random access performed by the device 400 that determines the QCL reference, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0412] In some embodiments, the second SSB satisfies at least one of the following:

[0413] There is an association between the first SSB and the second SSB;

[0414] The first SSB indicates relevant information about the second SSB;

[0415] The agreement specifies the relevant information of the second SSB corresponding to the first SSB;

[0416] The device 400 for determining the QCL reference completes the measurement of the second SSB before the first time reference point.

[0417] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0418] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0419] At least some of the TRS in the at least one TRS have different QCL references;

[0420] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0421] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0422] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0423] The at least one SSB and the at least one TRS have a QCL relationship.

[0424] In some embodiments, the receiving module 403 is further configured to receive an indication of at least one Transmission Configuration Indicator (TCI) state; wherein the at least one TCI state is used to indicate the QCL reference.

[0425] In some embodiments, the at least one TCI state satisfies any of the following:

[0426] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference indicated by the TCI state includes at least one of the at least one SSB and the at least one TRS;

[0427] The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

[0428] Therefore, in the embodiments of this application, the terminal can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0429] Referring to Figure 13, when the device for determining the QCL reference is a network-side device or a component in a network-side device, the device 500 for determining the QCL reference includes: a processing module 501, a receiving module 502, and a transmitting module 503.

[0430] The processing module 501 is used to determine the quasi-co-located QCL reference of the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block SSB and at least one tracking reference signal TRS;

[0431] The receiving module 502 is used to receive the first signal according to the QCL reference, or the sending module 503 is used to send the first signal according to the QCL reference.

[0432] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0433] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0434] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0435] It should be noted that at least one TRS can also be expressed as or replaced as at least one TRS including one TRS, that is, the number of at least one TRS is 1. This application does not limit this.

[0436] It should be noted that at least one TRS includes at least two TRS, or it can be expressed as at least one TRS is at least two TRS, and the embodiments of this application are not limited in this respect.

[0437] It should be understood that a subbandwidth group can contain one or more subbandwidths.

[0438] It should be noted that each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, which can exist in the following three cases:

[0439] Case 1: Each of the at least two TRSs corresponds to at least one sub-bandwidth;

[0440] Case 2, where each of the at least two TRSs corresponds to at least one sub-bandwidth group;

[0441] Case 3: In one of the at least two TRSs, each TRS corresponds to at least one sub-bandwidth, and in the other TRS, each TRS corresponds to at least one sub-bandwidth group.

[0442] The TRS sequence described in this application requires a distinction between its generation length and its occupied length. Specifically, the generation length of the TRS sequence (which can be understood as related to the TRS sequence generation formula but not to the actual frequency domain resources occupied by the TRS; alternatively, it can be understood as the potential sequence, complete sequence, full sequence, or sequence to be extracted) and the occupied length of the TRS sequence (which can be understood as related to the actual frequency domain resources occupied by the TRS, such as the number of subcarriers or REs actually occupied by the TRS) are both considered. The generation length of the TRS sequence is greater than or equal to the occupied length of the TRS sequence. For example, starting from a reference point, a TRS sequence of length N = 1000 is generated (i.e., the generation length of the TRS sequence is N = 1000), but the TRS actually occupies a portion of the frequency domain resources in the bandwidth, such as 500 subcarriers or REs. In this case, the occupied length of the TRS sequence is M = 500.

[0443] In some embodiments, the sequence of a TRS satisfies at least one of the following:

[0444] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS.

[0445] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS.

[0446] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0447] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0448] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

[0449] In some embodiments, the sequence of each of the at least two TRSs satisfies at least one of the following:

[0450] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS;

[0451] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS.

[0452] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0453] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS.

[0454] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0455] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0456] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS;

[0457] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

[0458] In some embodiments, the transmitting module 503 is further configured to transmit the one TRS or the at least two TRS;

[0459] When one TRS corresponds to at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS on each of the at least two sub-bandwidths.

[0460] or,

[0461] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0462] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS measurement on each of the at least two sub-bandwidths, including at least one of the following:

[0463] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two sub-bandwidths;

[0464] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on the largest sub-bandwidth among the at least two sub-bandwidths;

[0465] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two sub-bandwidths;

[0466] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two sub-bandwidths.

[0467] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS, including at least one of the following:

[0468] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two TRSs;

[0469] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein at least one of the timing and delay is measured by the terminal on the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group in the at least two TRSs;

[0470] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two TRSs;

[0471] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two TRSs.

[0472] In some embodiments, the one TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths:

[0473] Same time domain location;

[0474] Same frequency domain density;

[0475] Same frequency domain offset;

[0476] The occupied REs are kept at uniform intervals;

[0477] Same transmission power;

[0478] Associate with the same port.

[0479] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0480] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0481] The at least one SSB includes at least one of Cell Defined SSB (CD-SSB) and Non-Cell Defined SSB (NCD-SSB);

[0482] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0483] In some embodiments, the second SSB satisfies at least one of the following:

[0484] There is an association between the first SSB and the second SSB;

[0485] The first SSB indicates relevant information about the second SSB;

[0486] The agreement specifies the relevant information of the second SSB corresponding to the first SSB;

[0487] The terminal completes the measurement of the second SSB before the first time reference point.

[0488] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0489] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0490] At least some of the TRS in the at least one TRS have different QCL references;

[0491] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0492] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0493] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0494] The at least one SSB and the at least one TRS have a QCL relationship.

[0495] In some embodiments, the sending module 503 is further configured to indicate at least one Transmission Configuration Indicator (TCI) status;

[0496] The at least one TCI state is used to indicate the QCL reference.

[0497] In some embodiments, the at least one TCI state satisfies any of the following:

[0498] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference in the TCI state includes at least one of the at least one SSB and the at least one TRS;

[0499] The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

[0500] Therefore, in the embodiments of this application, the network-side device can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0501] The apparatus for determining the QCL reference provided in this application embodiment can implement the various processes implemented in the method embodiments of Figures 3 to 11 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0502] As shown in Figure 14, this application embodiment also provides a communication device 600, including a processor 601 and a memory 602, wherein the memory 602 stores programs or instructions that can run on the processor 601.

[0503] For example, when the communication device 600 is a terminal, the program or instruction executed by the processor 601 implements the various steps executed by the terminal in the above-described method embodiment for determining the QCL reference, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0504] For example, when the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, it implements the various steps executed by the network-side device in the above-described method embodiment for determining the QCL reference, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0505] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiment shown in FIG3. This terminal embodiment corresponds to the above-described terminal-side method embodiment, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal may be the device 400 for determining the QCL reference shown in FIG12. Specifically, FIG15 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0506] The terminal 700 includes, but is not limited to, at least some of the following components: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710.

[0507] Those skilled in the art will understand that the terminal 700 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 710 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 15 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0508] It should be understood that, in this embodiment, the input unit 704 may include a graphics processor 7041 and a microphone 7042. The graphics processor 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0509] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 701 can transmit it to the processor 710 for processing; in addition, the radio frequency unit 701 can send uplink data to the network-side device. Typically, the radio frequency unit 701 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0510] The memory 709 can be used to store software programs or instructions, as well as various data. The memory 709 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 709 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0511] Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0512] In some embodiments, the processor 710 is configured to determine a quasi-co-located QCL reference for a first signal, wherein the QCL reference includes at least one of a synchronization signal block (SSB) and a tracking reference signal (TRS).

[0513] The radio frequency unit 701 is used to send or receive the first signal according to the QCL reference.

[0514] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0515] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0516] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0517] In some embodiments, the sequence of a TRS satisfies at least one of the following:

[0518] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS.

[0519] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS.

[0520] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0521] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0522] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

[0523] In some embodiments, the sequence of each of the at least two TRSs satisfies at least one of the following:

[0524] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS;

[0525] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS.

[0526] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0527] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS.

[0528] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0529] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0530] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS;

[0531] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

[0532] In some embodiments, when the one TRS corresponds to at least two sub-bandwidths, the processor 710 is further configured to measure, based on the one TRS, the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two sub-bandwidths; or...

[0533] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the processor 710 is further configured to measure the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS, at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0534] In some embodiments, the processor 710 is specifically configured to perform at least one of the following:

[0535] On at least one of the at least two sub-bandwidths, at least one of timing and delay is measured, wherein the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0536] On the largest of the at least two sub-bandwidths, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0537] On at least one of the at least two sub-bandwidths, at least one of frequency offset and Doppler spread is measured, wherein the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the frequency offset and the Doppler spread;

[0538] In each of the at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured.

[0539] In some embodiments, the processor 710 is specifically configured to perform at least one of the following:

[0540] On at least one of the at least two TRSs, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0541] On the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group among the at least two TRSs, at least one of timing and delay is measured, and the channel characteristic parameter corresponding to the QCL reference of the first signal includes at least one of the timing and delay.

[0542] On at least one of the at least two TRSs, at least one of frequency offset and Doppler spread is measured, wherein the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and the Doppler spread.

[0543] On each of the at least two TRSs, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured.

[0544] In some embodiments, the one TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths:

[0545] Same time domain location;

[0546] Same frequency domain density;

[0547] Same frequency domain offset;

[0548] The occupied REs are kept at uniform intervals;

[0549] Same transmission power;

[0550] Associate with the same port.

[0551] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0552] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0553] The at least one SSB includes at least one of SSB CD-SSB and SSB NCD-SSB;

[0554] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0555] In some embodiments, the second SSB satisfies at least one of the following:

[0556] There is an association between the first SSB and the second SSB;

[0557] The first SSB indicates relevant information about the second SSB;

[0558] The agreement specifies the relevant information of the second SSB corresponding to the first SSB;

[0559] The terminal completes the measurement of the second SSB before the first time reference point.

[0560] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0561] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0562] At least some of the TRS in the at least one TRS have different QCL references;

[0563] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0564] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0565] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0566] The at least one SSB and the at least one TRS have a QCL relationship.

[0567] In some embodiments, the radio frequency unit 701 is further configured to receive an indication of at least one Transmission Configuration Indicator (TCI) state; wherein the at least one TCI state is used to indicate the QCL reference.

[0568] In some embodiments, the at least one TCI state satisfies any of the following:

[0569] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference indicated by the TCI state includes at least one of the at least one SSB and the at least one TRS;

[0570] The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

[0571] Therefore, in the embodiments of this application, the terminal can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0572] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effect. To avoid repetition, it will not be described again here.

[0573] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG4. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0574] Specifically, this application embodiment also provides a network-side device, which may be the device 500 for determining the QCL reference shown in FIG13. As shown in FIG16, the network-side device 800 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84, and a memory 85. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be transmitted and sends it to the radio frequency device 82. The radio frequency device 82 processes the received information and transmits it through the antenna 81.

[0575] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 83, which includes a baseband processor.

[0576] The baseband device 83 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG16. One of the chips is, for example, a baseband processor, which is connected to the memory 85 via a bus interface to call the program in the memory 85 and execute the network device operation shown in the above method embodiment.

[0577] The network-side device may also include a network interface 86, such as a Common Public Radio Interface (CPRI).

[0578] Specifically, the network-side device 800 in this application embodiment further includes: instructions or programs stored in memory 85 and executable on processor 84. Processor 84 calls the instructions or programs in memory 85 to execute the methods executed by each module shown in FIG13 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0579] In some embodiments, the processor 84 is configured to determine a quasi-co-located QCL reference for a first signal, wherein the QCL reference includes at least one of a synchronization signal block (SSB) and a tracking reference signal (TRS).

[0580] The radio frequency device 82 is used to receive or transmit the first signal according to the QCL reference.

[0581] In some embodiments, the sub-bandwidth corresponding to the at least one TRS satisfies any of the following:

[0582] The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths;

[0583] The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

[0584] In some embodiments, the sequence of a TRS satisfies at least one of the following:

[0585] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS.

[0586] The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS.

[0587] The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located.

[0588] No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS;

[0589] The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

[0590] In some embodiments, the sequence of each of the at least two TRSs satisfies at least one of the following:

[0591] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS;

[0592] The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS.

[0593] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS.

[0594] The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS.

[0595] No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs;

[0596] On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated;

[0597] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS;

[0598] The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

[0599] In some embodiments, the radio frequency device 82 is also used to transmit the one TRS or the at least two TRS;

[0600] When one TRS corresponds to at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS on each of the at least two sub-bandwidths.

[0601] or,

[0602] In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

[0603] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS measurement on each of the at least two sub-bandwidths, including at least one of the following:

[0604] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two sub-bandwidths;

[0605] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on the largest sub-bandwidth among the at least two sub-bandwidths;

[0606] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two sub-bandwidths;

[0607] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two sub-bandwidths.

[0608] In some embodiments, the channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS, including at least one of the following:

[0609] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two TRSs;

[0610] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein at least one of the timing and delay is measured by the terminal on the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group in the at least two TRSs;

[0611] The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two TRSs;

[0612] The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two TRSs.

[0613] In some embodiments, the one TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths:

[0614] Same time domain location;

[0615] Same frequency domain density;

[0616] Same frequency domain offset;

[0617] The occupied REs are kept at uniform intervals;

[0618] Same transmission power;

[0619] Associate with the same port.

[0620] In some embodiments, when the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following:

[0621] Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group;

[0622] The at least one SSB includes at least one of Cell Defined SSB (CD-SSB) and Non-Cell Defined SSB (NCD-SSB);

[0623] Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

[0624] In some embodiments, the second SSB satisfies at least one of the following:

[0625] There is an association between the first SSB and the second SSB;

[0626] The first SSB indicates relevant information about the second SSB;

[0627] The agreement specifies the relevant information of the second SSB corresponding to the first SSB;

[0628] The terminal completes the measurement of the second SSB before the first time reference point.

[0629] In some embodiments, when the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following:

[0630] The QCL reference for at least a portion of the at least one TRS is the SSB;

[0631] At least some of the TRS in the at least one TRS have different QCL references;

[0632] The QCL reference corresponding to each of the at least one TRS is at least two second signals.

[0633] In some embodiments, when the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following:

[0634] The at least one SSB and the at least one TRS correspond to different sub-bandwidths;

[0635] The at least one SSB and the at least one TRS have a QCL relationship.

[0636] In some embodiments, the radio frequency device 82 is further configured to indicate at least one transmission configuration indication TCI state;

[0637] The at least one TCI state is used to indicate the QCL reference.

[0638] In some embodiments, the at least one TCI state satisfies any of the following:

[0639] The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference in the TCI state includes at least one of the at least one SSB and the at least one TRS;

[0640] The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

[0641] Therefore, in the embodiments of this application, the network-side device can transmit or receive the first signal based on at least one of at least one SSB and at least one TRS as the QCL reference, thereby improving the performance of transmitting or receiving the first signal on a large bandwidth composed of multiple discrete spectra, and at the same time reducing the complexity of the terminal measuring the channel characteristic parameters corresponding to the QCL reference.

[0642] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described method embodiment for determining the QCL reference and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0643] The processor mentioned above is the processor in the terminal or network-side device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some embodiments, the readable storage medium may be a non-transient readable storage medium.

[0644] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described method embodiment for determining the QCL reference, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0645] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0646] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the method embodiment for determining the QCL reference described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0647] This application also provides a wireless communication system, including: a terminal and a network-side device. The terminal can be used to perform the steps executed by the terminal in the method for determining a QCL reference as described above, and the network-side device can be used to perform the steps executed by the network-side device in the method for determining a QCL reference as described above.

[0648] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0649] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0650] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for determining a QCL reference, comprising: The terminal determines a quasi-co-located QCL reference for the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block (SSB) and at least one tracking reference signal (TRS). The terminal sends or receives the first signal according to the QCL reference.

2. The method according to claim 1, wherein, The sub-bandwidth corresponding to at least one TRS satisfies any of the following: The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths; The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

3. The method according to claim 2, wherein, The sequence of a TRS satisfies at least one of the following: The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS. The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS. The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located. No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS; The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

4. The method according to claim 2, wherein, The sequence of each of the at least two TRSs satisfies at least one of the following: The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS; The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS. The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the sub-bandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the sub-bandwidth corresponding to each TRS. The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS. No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs; On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated; The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS; The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

5. The method of claim 2, wherein, The method further includes: When one TRS corresponds to at least two sub-bandwidths, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the one TRS on each of the at least two sub-bandwidths; or... In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS in the at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

6. The method according to claim 5, wherein, The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on the one TRS on each of the at least two sub-bandwidths, including at least one of the following: The terminal measures at least one of timing and delay on at least one of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay. The terminal measures at least one of timing and delay on the largest sub-bandwidth of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay. The terminal measures at least one of frequency offset and Doppler spread on at least one of the at least two sub-bandwidths, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and Doppler spread; The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two sub-bandwidths.

7. The method according to claim 5, wherein, The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS, on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS, including at least one of the following: The terminal measures at least one of timing and delay on at least one of the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay. The terminal measures at least one of timing and delay on the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group among the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the timing and the delay. The terminal measures at least one of frequency offset and Doppler spread on at least one of the at least two TRSs, and the channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of the frequency offset and Doppler spread; The terminal measures the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two TRSs.

8. The method according to claim 2, wherein, The TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths: Same time domain location; Same frequency domain density; Same frequency domain offset; The occupied REs are kept at uniform intervals; Same transmission power; Associate with the same port.

9. The method according to any one of claims 1 to 8, wherein, When the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following: Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group; The at least one SSB includes at least one of Cell Defined SSB (CD-SSB) and Non-Cell Defined SSB (NCD-SSB); Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

10. The method according to claim 9, wherein, The second SSB satisfies at least one of the following: There is an association between the first SSB and the second SSB; The first SSB indicates relevant information about the second SSB; The agreement specifies the relevant information of the second SSB corresponding to the first SSB; The terminal completes the measurement of the second SSB before the first time reference point.

11. The method according to any one of claims 1 to 8, wherein, When the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following: The QCL reference for at least a portion of the at least one TRS is the SSB; At least some of the TRS in the at least one TRS have different QCL references; The QCL reference corresponding to each of the at least one TRS is at least two second signals.

12. The method according to any one of claims 1 to 8, wherein, When the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following: The at least one SSB and the at least one TRS correspond to different sub-bandwidths; The at least one SSB and the at least one TRS have a QCL relationship.

13. The method of any one of claims 1 to 12, wherein, The method further includes: The terminal receives at least one indication of the Transmission Configuration Indicator (TCI) status; The at least one TCI state is used to indicate the QCL reference.

14. The method according to claim 13, wherein, The at least one TCI state satisfies any of the following: The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference indicated by the TCI state includes at least one of the at least one SSB and the at least one TRS; The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

15. A method for determining a QCL reference, comprising: The network-side device determines a quasi-co-located QCL reference for the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block (SSB) and at least one tracking reference signal (TRS). The network-side device receives or sends the first signal according to the QCL reference.

16. The method according to claim 15, wherein, The sub-bandwidth corresponding to at least one TRS satisfies any of the following: The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths; The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

17. The method according to claim 16, wherein, The sequence of a TRS satisfies at least one of the following: The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of resource elements (REs) occupied by the subbandwidth corresponding to the TRS. The generation length of the sequence of a TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to the TRS, or the generation length of the sequence of a TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to the TRS. The generation length of the sequence of a TRS is equal to the number of subcarriers occupied by the bandwidth portion (BWP) where the TRS is located, or the generation length of the sequence of a TRS is equal to the number of REs occupied by the BWP where the TRS is located. No sequence of the TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the TRS; The starting reference point for generating the sequence of the TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to the TRS, or the starting reference point for generating the sequence of the TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to the TRS.

18. The method according to claim 16, wherein, The sequence of each of the at least two TRSs satisfies at least one of the following: The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth corresponding to each TRS; The generation length of the sequence of each TRS is equal to the number of subcarriers occupied by the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs occupied by the subbandwidth group corresponding to each TRS. The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth corresponding to each TRS. The generation length of the sequence of each TRS is equal to the number of subcarriers actually occupied by the TRS on the subbandwidth group corresponding to each TRS, or the generation length of the sequence of each TRS is equal to the number of REs actually occupied by the TRS on the subbandwidth group corresponding to each TRS. No sequence of each TRS is generated on the interval bandwidth between each sub-bandwidth corresponding to the at least two TRSs; On the interval bandwidth between each sub-bandwidth group corresponding to the at least two TRS, no sequence of each TRS is generated; The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth corresponding to each TRS; The starting reference point for generating the sequence of each TRS is the first subcarrier of the first subbandwidth in the subbandwidth group corresponding to each TRS, or the starting reference point for generating the sequence of each TRS is the first RE of the first subbandwidth in the subbandwidth group corresponding to each TRS.

19. The method of claim 16, wherein, The method further includes: The network-side device sends the one TRS or the at least two TRS; When one TRS corresponds to at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS on each of the at least two sub-bandwidths. or, In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

20. The method according to claim 19, wherein, The channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS measurement on each of the at least two sub-bandwidths, including at least one of the following: The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two sub-bandwidths; The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on the largest sub-bandwidth among the at least two sub-bandwidths; The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two sub-bandwidths; The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two sub-bandwidths.

21. The method according to claim 19, wherein, The channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS, including at least one of the following: The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein the timing and delay are measured by the terminal on at least one of the at least two TRSs; The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of timing and delay, wherein at least one of the timing and delay is measured by the terminal on the TRS corresponding to the maximum sub-bandwidth or the TRS of the maximum sub-bandwidth group in the at least two TRSs; The channel characteristic parameters corresponding to the QCL reference of the first signal include at least one of frequency offset and Doppler spread, wherein the frequency offset and the Doppler spread are measured by the terminal on at least one of the at least two TRSs; The channel characteristic parameters corresponding to the QCL reference of the first signal are measured by the terminal on each of the at least two TRSs.

22. The method according to claim 16, wherein, The TRS satisfies at least one of the following on each corresponding sub-bandwidth, or the at least two TRSs satisfy at least one of the following on each corresponding sub-bandwidth or group of sub-bandwidths: Same time domain location; Same frequency domain density; Same frequency domain offset; The occupied REs are kept at uniform intervals; Same transmission power; Associate with the same port.

23. The method according to any one of claims 15 to 22, wherein, When the QCL reference includes the at least one SSB, the at least one SSB satisfies at least one of the following: Each of the at least one SSB corresponds to a sub-bandwidth or a sub-bandwidth group; The at least one SSB includes at least one of Cell Defined SSB (CD-SSB) and Non-Cell Defined SSB (NCD-SSB); Before TRS is activated, the at least one SSB includes at least one of a first SSB and a second SSB; wherein, the first SSB is the SSB corresponding to the terminal when performing random access, and the second SSB is an SSB on a sub-bandwidth other than the sub-bandwidth corresponding to the first SSB.

24. The method according to claim 23, wherein, The second SSB satisfies at least one of the following: There is an association between the first SSB and the second SSB; The first SSB indicates relevant information about the second SSB; The agreement specifies the relevant information of the second SSB corresponding to the first SSB; The terminal completes the measurement of the second SSB before the first time reference point.

25. The method according to any one of claims 15 to 22, wherein, When the QCL reference includes the at least one TRS, the at least one TRS satisfies at least one of the following: The QCL reference for at least a portion of the at least one TRS is the SSB; At least some of the TRS in the at least one TRS have different QCL references; The QCL reference corresponding to each of the at least one TRS is at least two second signals.

26. The method according to any one of claims 15 to 22, wherein, When the QCL reference includes the at least one SSB and the at least one TRS, the at least one SSB and the at least one TRS satisfy at least one of the following: The at least one SSB and the at least one TRS correspond to different sub-bandwidths; The at least one SSB and the at least one TRS have a QCL relationship.

27. The method of any one of claims 15 to 26, wherein, The method further includes: The network-side device indicates at least one Transmission Configuration Indicator (TCI) status; The at least one TCI state is used to indicate the QCL reference.

28. The method according to claim 27, wherein, The at least one TCI state satisfies any of the following: The at least one TCI state is a TCI state, and the TCI state corresponds to at least two sub-bandwidths; wherein, the QCL reference in the TCI state includes at least one of the at least one SSB and the at least one TRS; The at least one TCI state includes at least two TCI states, and each of the at least two TCI states corresponds to a sub-bandwidth or a sub-bandwidth group.

29. An apparatus for determining a QCL reference, comprising: Processing module, sending module, and receiving module; The processing module is used to determine the quasi-co-located QCL reference of the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block SSB and at least one tracking reference signal TRS; The transmitting module is configured to transmit the first signal according to the QCL reference, or the receiving module is configured to receive the first signal according to the QCL reference.

30. The apparatus according to claim 29, wherein, The sub-bandwidth corresponding to at least one TRS satisfies any of the following: The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths; The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

31. The apparatus according to claim 30, wherein, When one TRS corresponds to at least two sub-bandwidths, the processing module is further configured to measure, based on the one TRS, the channel characteristic parameters corresponding to the QCL reference of the first signal on each of the at least two sub-bandwidths; or, In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the processing module is further configured to measure the channel characteristic parameters corresponding to the QCL reference of the first signal based on each TRS, at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

32. The apparatus according to any one of claims 29 to 31, wherein, The receiving module is also configured to receive at least one indication of the Transmission Configuration Indicator (TCI) status; The at least one TCI state is used to indicate the QCL reference.

33. An apparatus for determining a QCL reference, comprising: Processing module, receiving module, and sending module; The processing module is used to determine the quasi-co-located QCL reference of the first signal, wherein the QCL reference includes at least one of at least a synchronization signal block SSB and at least one tracking reference signal TRS; The receiving module is used to receive the first signal according to the QCL reference, or the transmitting module is used to transmit the first signal according to the QCL reference.

34. The apparatus according to claim 33, wherein, The sub-bandwidth corresponding to at least one TRS satisfies any of the following: The at least one TRS is a TRS, and the one TRS corresponds to at least two sub-bandwidths; The at least one TRS includes at least two TRSs, and each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group.

35. The apparatus according to claim 34, wherein, The transmitting module is also used to transmit the one TRS or the at least two TRS; When one TRS corresponds to at least two sub-bandwidths, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on the one TRS on each of the at least two sub-bandwidths. or, In the case where each of the at least two TRSs corresponds to at least one sub-bandwidth or at least one sub-bandwidth group, the channel characteristic parameters corresponding to the QCL reference of the first signal are obtained by the terminal based on each TRS on at least one sub-bandwidth or at least one sub-bandwidth group corresponding to each TRS.

36. The apparatus according to any one of claims 33 to 35, wherein, The sending module is also used to indicate at least one Transmission Configuration Indicator (TCI) status; The at least one TCI state is used to indicate the QCL reference.

37. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method for determining a QCL reference as claimed in any one of claims 1 to 14.

38. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method for determining a QCL reference as claimed in any one of claims 15 to 28.

39. A readable storage medium storing a program or instructions that, when executed by a processor, implement the method for determining a QCL reference as claimed in any one of claims 1 to 14, or implement the steps of the method for determining a QCL reference as claimed in any one of claims 15 to 28.

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