Signal transmission method, communication node and storage medium

Abstract

The present application provides a signal transmission method, a communication node and a storage medium. The method comprises: determining a sub-band parameter; determining a parameter of a signal in at least one sub-band on the basis of the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth; and transmitting the signal on the basis of the parameter of the signal, wherein the transmission comprises reception or sending.

Description

Signal transmission methods, communication nodes and storage media Technical Field

[0001] This application relates to the field of wireless communication technology, such as signal transmission methods, communication nodes, and storage media. Background Technology

[0002] In the New Radio (NR) standard, for the entire bandwidth of a serving cell, it is assumed that the channel between a transceiver node and a terminal corresponds to only one optimal radio frequency (RF) transmit beam pair. If the terminal is allowed to feed back multiple candidate RF beam pairs to counteract temporary blockage of some preferred beam pairs or for simultaneous multi-user scheduling at the base station, and assuming that each candidate RF beam is suitable for the entire bandwidth and that performance across the entire bandwidth is not significantly different, the corresponding optimal receive beam is the same across the entire bandwidth. However, with the continuous development of wireless communication technology, the number of antennas and communication bandwidth used in future 5G-A or 6G technologies will increase, leading to significant dispersion. Due to dispersion, the corresponding transmit beams at different frequency domain locations will be different, and the receive beams may also be different, with different beam dispersion bandwidths. The above assumption that a single RF beam is suitable for the entire bandwidth will have a lower match with the actual channel, resulting in reduced communication performance. Summary of the Invention

[0003] This application provides a signal transmission method, a communication node, and a storage medium.

[0004] This application provides a signal transmission method applied to a communication node, the method comprising:

[0005] Determine subband parameters; determine parameters of a signal in at least one subband based on the subband parameters, wherein the at least one subband belongs to a frequency domain bandwidth; transmit the signal based on the signal parameters, the transmission including receiving or sending.

[0006] This application also provides a communication node, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the signal transmission method described above.

[0007] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described signal transmission method. Attached Figure Description

[0008] Figure 1 is a schematic diagram of a transmit beam and a receive beam provided in an embodiment;

[0009] Figure 2 is a schematic diagram of another transmit beam and receive beam provided in one embodiment;

[0010] Figure 3 is a flowchart of a signal transmission method provided in one embodiment;

[0011] Figure 4 is a schematic diagram of a subband occupied by an SSB according to an embodiment;

[0012] Figure 5 is a schematic diagram of another sub-band occupied by an SSB according to an embodiment;

[0013] Figure 6 is a schematic diagram of another subband occupied by an SSB according to an embodiment;

[0014] Figure 7 is a flowchart of another signal transmission method provided in one embodiment;

[0015] Figure 8 is a schematic diagram of a signal transmission device according to an embodiment;

[0016] Figure 9 is a schematic diagram of another signal transmission device provided in one embodiment;

[0017] Figure 10 is a schematic diagram of the hardware structure of a communication node according to an embodiment. Detailed Implementation

[0018] The present application will now be described in conjunction with the accompanying drawings and embodiments. Unless otherwise specified, the embodiments and features described herein can be combined arbitrarily.

[0019] Due to dispersion, the transmitting beam at different frequency domain locations may differ, and the receiving beam at the receiving end may also differ. Figures 1 and 2 are schematic diagrams of the transmitting and receiving beams. As shown in Figures 1 and 2, the optimal transmitting and receiving beams for the corresponding service nodes (network-side nodes, such as base stations) on different sub-bands may differ. Furthermore, different beams have different dispersion bandwidths. For example, beams with small angles have larger dispersion bandwidths, while beams with large angles have smaller dispersion bandwidths. The dispersion sub-band corresponding to the small-angle beam 0 is larger than the sub-band corresponding to the large-angle beam 10. Therefore, for beam 0, the sub-band corresponding to one BWP is divided into 4 sub-bands, as shown in Figure 1; for beam 10, the sub-band corresponding to one BWP is divided into 5 sub-bands, as shown in Figure 2. Generally, the preferred transmitting beams corresponding to each sub-band are beams with similar angles. The larger the frequency domain interval between two sub-bands, the greater the difference in angle between the preferred beams corresponding to the two sub-bands. The transmit beam mentioned above can be a radio frequency (RF) transmit beam, and the receive beam can be an RF receive beam. This phenomenon becomes more pronounced as the number of antennas and bandwidth of the communication increase. Assuming that a channel between a transceiver node and a terminal corresponds to only one optimal RF transmit beam pair, that each candidate RF beam is applicable across the entire bandwidth, that the performance difference across the entire bandwidth is not significant, and that the corresponding optimal receive beam is the same across the entire bandwidth, then the dispersion phenomenon of the actual channel cannot be well matched. Therefore, the signal transmission method provided in this application determines signal parameters based on sub-band parameters, enabling the transmitter to adopt transmission parameters that better match the actual channel, thereby improving communication efficiency and reliability. The solution provided in this application can also be applied to scenarios where the RF beam in the frequency domain changes significantly with the frequency domain due to non-dispersion factors, such as scenarios where the optimal RF beam at different frequency domain positions changes significantly due to multipath superposition factors. The solution proposed in this application can also be used in such scenarios.

[0020] In this embodiment, the first communication node can be understood as the controllable end during signal transmission, and the second communication node can be understood as the end with control functions. For example, the second communication node can send control signaling to the first communication node to indicate relevant parameters for signal transmission. In one example, the first communication node can be a user-side device, such as a user equipment (UE), mobile terminal, mobile phone, or computing device; the second communication node can be a network-side device, such as a service node, mobile terminal, or access point; for downlink signals, the first communication node is the receiving end, and the second communication node is the transmitting end; for uplink signals, the first communication node is the transmitting end, and the second communication node is the receiving end.

[0021] Figure 3 is a flowchart of a signal transmission method provided in one embodiment, which can be applied to a first communication node. As shown in Figure 3, the method provided in this embodiment includes:

[0022] In 110, the subband parameters are determined.

[0023] In step 120, parameters of a signal in at least one sub-band are determined based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth.

[0024] In 130, the signal is transmitted according to the parameters of the signal, and the transmission includes receiving or sending.

[0025] In this embodiment, the first communication node can transmit the signal (the transmitted signal can also be called the target signal) according to the parameters of the signal corresponding to the determined sub-band. The sub-band parameters corresponding to the frequency domain bandwidth of the determined sub-band can be notified through one or more of the following signaling: Radio Resource Control (RRC) signaling, Media Access Control-Control Element (MAC-CE) signaling, Downlink Control Information (DCI) signaling, or determined from the configuration information of the set parameters. Among them, DCI can also be called physical layer control information or physical layer control signaling, or dynamic control information or dynamic control signaling, etc.

[0026] In one embodiment, the subband parameters are configured in the configuration information of the setting parameters, which include one of the following: frequency domain bandwidth, measurement reference signal resources, transmission configuration indication (TCI) status, signal, measurement reference signal resource group, and TCI status group.

[0027] For example, determining subband parameters can involve defining the subband parameters corresponding to a frequency domain bandwidth. This could involve determining one or more of the following subband partitioning parameters: subband size, the starting reference position of the first subband, the number of subbands, and whether the Physical Resource Block (PRB) index included in the subband is obtained from the common reference position in the Component Carrier (CC) or from the set of BWPs included in the Bandwidth part (BWP). A frequency domain bandwidth can include more than one subband.

[0028] The subband parameters can be determined based on at least one of the following: signaling information notified by the second communication node, information fed back by the first communication node, reference signal resource index, and configuration information of the above-mentioned setting parameters.

[0029] The second communication node can establish a relationship between reference signal resource indexes and subband partitioning parameters (i.e., subband parameters). Different reference signal resource indices correspond to different subband partitioning parameters. When subband parameters are determined from the configuration information of the set parameters, the subband parameters for a frequency domain bandwidth can be dynamically changed or changed according to the preset parameters. Subbands obtained based on a set of subband partitioning parameters include different sets of PRBs. Each subband includes consecutive PRBs, and each PRB in the frequency domain bandwidth is included in one subband. That is, a subband divides a frequency domain bandwidth into several consecutive subbands, and each subband includes consecutive PRBs. Except for the first and last two subbands (or one or more subbands in the middle), the number of PRBs included in other subbands is the same. Alternatively, in some scenarios, the size of the subband is determined based on the distance from the reference subband (or the distance from the reference frequency domain location); the farther away from the reference subband or reference carrier frequency, the smaller the subband. A frequency domain bandwidth can include more than one sub-band. The same radio frequency transmission beam of the second communication node is matched with different channel paths on different sub-bands, thus having different quasi-co-location (QCL) parameters.

[0030] For example, determining subband parameters can involve defining the subband parameters corresponding to a measurement reference signal resource or resource group, such as configuring the subband parameters corresponding to that resource resource or resource group when configuring the measurement reference signal resource or resource group. Further, the subband parameters of a target signal are obtained based on the subband parameters corresponding to the quasi-co-located measurement reference signal of that target signal, where the quasi-co-located measurement reference signal is a measurement reference signal. If the above correspondence is configured via RRC signaling, then the transmit beam (or transmit beam group) corresponding to a measurement reference signal cannot be flexibly changed because different transmit beams (or transmit beam groups) of the second communication node will correspond to different subband parameters. However, if the subband parameters corresponding to a measurement reference signal resource or resource group are dynamically configured via MAC-CE signaling or DCI signaling, then the transmit beam (or transmit beam group) of the base station corresponding to a measurement reference signal resource or resource group can be flexibly changed.

[0031] For example, determining subband parameters can involve determining the subband parameters corresponding to the TCI state of the second communication node. This can be done by configuring the subband parameters corresponding to the TCI state during TCI state configuration. The subband parameters of a target signal are obtained from the subband parameters in the corresponding TCI state. The TCI state is a logical unit for configuring quasi-co-located measurement reference signals. The TCI state configures the measurement reference signal resource index corresponding to the quasi-co-located measurement reference signal. If this correspondence is configured using RRC, the transmit beam corresponding to a measurement reference signal resource can be changed, but the transmit beam corresponding to a TCI state index generally cannot be changed. For example, if the same measurement reference signal resource is associated with multiple TCI states, the second communication node can use different transmit beams to transmit this measurement reference signal resource when different TCI states are activated. However, if the subband parameters corresponding to a TCI state can be configured via MAC-CE signaling, the transmit beam corresponding to a TCI state can be changed.

[0032] For example, the sub-band parameters of the target signal can be notified in the DCI (Distributed Control Center) of the scheduling target signal. Since different transmission beams are used to transmit the target signal, the corresponding sub-band parameters can be dynamically changed through DCI notification.

[0033] In one embodiment, determining the subband parameters includes:

[0034] 1110: Determine the setting parameters corresponding to the signal.

[0035] 1120: Determine the sub-band parameters corresponding to the signal based on the set parameters corresponding to the signal.

[0036] In one embodiment, in the DCI that schedules the signal, the setting parameters corresponding to the signal are associated with at least one of the following information about the frequency domain resources occupied by the signal: frequency domain range, allocation granularity, and number of bits occupied by the signaling bit domain.

[0037] For example, the TCI state of a signal is related to the frequency domain resources it occupies. If the TCI state of a signal is notified via DCI, then the bit field of the frequency domain resources notified in this DCI is related to the bit field of the notified TCI state. For example, based on the notified TCI state value in the TCI state bit field, at least one of the following can be determined in the DCI: the frequency domain range corresponding to the notified frequency domain resource domain, the granularity of frequency domain resource allocation, and the number of bits occupied by the bit field of the frequency domain resources. Alternatively, the set of TCI states corresponding to the TCI bit field can also be determined based on the frequency domain parameters corresponding to the downlink signal notified in the DCI.

[0038] In one embodiment, determining the parameters of a signal in at least one sub-band based on sub-band parameters includes: determining a sub-band occupied by the signal at a time and a frequency domain bandwidth based on the sub-band parameters; transmitting the signal based on the signal parameters includes: transmitting the signal on the one sub-band; wherein the signal parameters include the number of sub-bands occupied by the signal at a time and a frequency domain bandwidth.

[0039] In this embodiment, the first communication node can only transmit a signal from one sub-band within a frequency domain bandwidth at any given time. At this time, the signal in one sub-band can be either one signal or multiple signals.

[0040] In one embodiment, determining the parameters of a signal in at least one sub-band based on sub-band parameters includes: determining one or more sub-bands occupied by the signal at a given time and frequency bandwidth based on the sub-band parameters; transmitting the signal based on the signal parameters includes: transmitting the signal on the one or more sub-bands; wherein, when the number of sub-bands is greater than 1, measurement reference signals associated with signals in different sub-bands satisfy predetermined conditions; the signal parameters include the number of sub-bands occupied by the signal at a given time and frequency bandwidth, and this measurement reference signal is a quasi-co-located measurement reference signal for the signal. At this time, the signals in the multiple sub-bands can be a single signal or multiple signals, and each of the multiple signals occupies one or more sub-bands among the multiple sub-bands.

[0041] In this embodiment, the terminal can transmit signals from one or more sub-bands within a single frequency bandwidth at any given time. If signals from multiple sub-bands are transmitted, the measurement reference signals associated with the signals in different sub-bands satisfy predetermined conditions.

[0042] In one embodiment, the predetermined conditions include at least one of the following: the first type of quasi-co-address parameters (QCL-Type D) associated with signals on multiple sub-bands satisfy the QCL relationship; the measurement reference signals associated with signals in different sub-bands belong to a reference signal group; and the maximum number of measurement reference signals that do not satisfy the QCL relationship with respect to the first type of quasi-co-address parameters is less than a predetermined value.

[0043] In this embodiment, if the first communication node needs to transmit multiple signals at a given time, the subbands obtained based on the subband parameters corresponding to the multiple signals will be different, for example, the subband sizes will be different. One implementation requires that the subband parameters corresponding to the multiple signals transmitted by the first communication node within a frequency domain bandwidth at a given time be the same; another implementation allows each of the multiple signals to have its own subband parameters, and signals are transmitted according to their respective subband parameters, but requires that the quasi-co-located measurement reference signal associated with these multiple signals meets the aforementioned predetermined conditions. Here, QCL-Type D is a large-size parameter spatial domain receiving filter parameter; yet another implementation allows the second communication node to further instruct the first communication node, if it needs to transmit signals from multiple subbands at a given time, which subband's QCL-Type D is used as the QCL-Type D parameter for the entire frequency domain bandwidth, and this subband can be called the reference subband.

[0044] In one embodiment, determining the parameters of a signal in at least one sub-band based on sub-band parameters includes at least one of the following: determining the parameters of the signal in each sub-band based on the distance between each sub-band and a reference sub-band; and determining the size of each sub-band based on the distance between each sub-band and a reference sub-band.

[0045] In this embodiment, the first communication node can adjust the signal parameters in each sub-band based on the distance between the sub-band and the reference sub-band. The signal parameters include one or more of the following: quasi-co-address parameters, modulation and coding scheme (MCS), redundancy version (RV), frequency domain scheduling granularity, channel quality, precoding resource block group (PRG) size, transmit filter, and power. This allows different sub-bands to correspond to different signal parameters, or different sub-bands to obtain their signal parameters based on the same set of signal parameters and the aforementioned distance.

[0046] In one embodiment, the frequency domain resources occupied by a signal at a given time are located in a sub-band.

[0047] In one embodiment, the frequency domain resources occupied by a signal at a given time are located in at least two sub-bands; wherein, each sub-band corresponds to a set of signal parameters.

[0048] The signal parameters include at least one of the following: quasi-co-address parameters, MCS, RV, frequency domain scheduling granularity, channel quality, PRG size, transmit filter, and power. For example, a Channel State Information Reference Signal (CSI-RS) resource can occupy multiple subbands. Each CSI-RS in different subbands corresponds to a set of QCL parameters, where QCL parameters include large-scale channel parameters, such as one or more of the following: Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameters. For example, the maximum number of subbands in which a PDSCH occupies a PRB at a given time can be determined. This maximum number can be one or more, and is determined based on at least one of the following: second communication node configuration, first communication node feedback, or a predetermined value. For example, the first communication node may have multiple panels, and different panels are used to generate receive beams for receiving PDSCH in different subbands. For example, panel 1 generates receive beam 1 for receiving receive beam 1 on subband 1, and panel 2 generates receive beam 2 on subband 2. The first communication node can generate a maximum of two different receive beams at any given time. This capability can be UE-specific, carrier-frequency-specific, or carrier group-specific. When the number of subbands occupied by the PDSCH is greater than one, each subband corresponds to a set of signal parameters for the PDSCH.

[0049] In one embodiment, the method further includes:

[0050] 140: Information on the ability to determine the maximum number of subbands corresponding to a signal at a given time and frequency bandwidth.

[0051] 150: Report capability information to the second communication node.

[0052] In this embodiment, the first communication node can provide feedback on the maximum number of subbands that can be transmitted in a frequency domain bandwidth at a given time. This capability can be UE-specific, carrier-specific, or carrier group-specific.

[0053] In this embodiment, the first communication node reports capability information associated with a measurement reference signal resource. For different measurement reference signal resources, the first communication node can report capability information separately. The capability information includes at least one of the following parameters: sub-band parameters or the number of sub-band signals that the first communication node can transmit at one time and one frequency domain bandwidth. The signals and the measurement reference signal resource satisfy a quasi-co-address relationship. For example, when the terminal performs downlink channel measurement, it selects a measurement reference signal resource and reports the capability information corresponding to this measurement reference signal resource.

[0054] In this embodiment, the first communication node provides feedback on which sub-bands it can transmit simultaneously.

[0055] There are several ways to determine the reference subband. One implementation is that the reference subband (such as the subband corresponding to f_0 in formula (1) below) is at the CC level. In this case, the radio frequency transmission beam of the second communication node is determined based on the channel of the signal in the reference subband. Another implementation is that the reference subband is at the BWP level. In this case, the radio frequency transmission beam of the second communication node is determined based on the channel of the signal in the reference subband in the BWP. In yet another implementation, the reference subband can also be determined by the signal level, or the reference subband index can change over time. The second communication node can dynamically notify the PRB index included in the reference subband. The PRBs included in other subbands are symmetrically extended to both sides based on the reference subband. On this basis, at each moment, the subband aligned with the radio frequency transmission beam of the second communication node can be dynamically changed. The subband aligned with the radio frequency transmission beam of the second communication node can be called the reference subband. The further away the subband is from the reference subband, the lower the degree of matching (such as correlation value) between its channel and the radio frequency transmission beam of the second communication node.

[0056] For uplink transmission, the first communication node can report how many sub-bands of signals it can transmit at a given time within a given frequency domain bandwidth, i.e., the maximum number of transmit sub-bands it can report. For downlink transmission, the first communication node can report how many sub-bands of signals it can receive at a given time within a given frequency domain bandwidth, i.e., the maximum number of receive sub-bands it can report.

[0057] In one embodiment, when the maximum number of subbands occupied by the signal is greater than 1, each subband is symmetrically distributed on both sides of the reference subband.

[0058] When the maximum number of subbands occupied by the signal is greater than 1, multiple subbands are symmetrically distributed on both sides of the reference subband, or this maximum number refers to the number of subbands on one side of the reference subband. For example, the number of subbands occupied on each side of the reference subband cannot exceed the maximum number determined above. PDSCH can occupy any side or both sides of the reference subband, but the number of subbands on any side of the reference subband cannot exceed the above-mentioned capacity.

[0059] In one embodiment, a signal corresponds to a set of signal parameters in each of at least one subband; and / or, a signal does not satisfy a quasi-co-address relationship with respect to at least the second type of quasi-co-address parameters in different subbands of at least one subband.

[0060] In this embodiment, when a signal occupies multiple sub-bands, each sub-band corresponds to a set of parameters for the target signal. In one embodiment, the signals in different sub-bands satisfy the quasi-co-address relationship with respect to the first type of quasi-co-address parameters, but do not satisfy the quasi-co-address relationship with respect to the second type of quasi-co-address parameters. For example, the first type of quasi-co-address parameters include at least one of the following: receiving filter, Doppler frequency shift, and Doppler spread; the second type of quasi-co-address parameters include at least one of the following: Doppler frequency shift, Doppler spread, average time delay, time delay spread, and average gain.

[0061] In one embodiment, the TCI state of the signal is configured with one of the following information: resource index of the quasi-co-located measurement reference signal, serving cell and target subband index of the quasi-co-located measurement reference signal; resource index of the quasi-co-located measurement reference signal, serving cell and BWP index of the quasi-co-located measurement reference signal; resource index of the quasi-co-located measurement reference signal, serving cell, BWP index and target subband index of the quasi-co-located measurement reference signal.

[0062] In this embodiment, when indicating the quasi-co-address reference signal of the indicator signal, it can be further determined which subband's quasi-co-address parameters are used to obtain the quasi-co-address parameters of the target signal. For example, the resource index of the quasi-co-address reference signal, the serving cell where the quasi-co-address reference signal is located, and the subband index can be indicated in the TCI state. In this case, the reference start point of the subband is defined at the serving cell level. Alternatively, the resource index of the quasi-co-address reference signal, the serving cell where the quasi-co-address reference signal is located, and the BWP index can be indicated in the TCI state. In this case, a quasi-co-address reference signal is required to occupy only one subband in a BWP. Alternatively, the resource index of the quasi-co-address reference signal, the serving cell where the quasi-co-address reference signal is located, the BWP index, and the subband index can be indicated in the TCI state. In this case, a quasi-co-address reference signal can occupy multiple PRBs in a BWP. Here, the resource index of the quasi-co-address reference signal is the index of the quasi-co-address reference signal resource where the quasi-co-address reference signal is located.

[0063] A quasi-co-located reference signal resource can be a measurement reference signal resource, which is the logical unit for the second communication node to configure measurement reference signals. A measurement reference signal resource contains the time-domain, frequency-domain, code-domain, and / or power information corresponding to the measurement reference signal. It can also be configured with spatial resources corresponding to the measurement reference signal, such as a quasi-co-located reference signal. The large-scale channel parameters of the measurement reference signal are derived based on the corresponding quasi-co-located reference signal. Alternatively, the second communication node may agree that the quasi-co-located parameters of the target signal in a sub-band are obtained from the quasi-co-located parameters of the target signal's quasi-co-located reference signal in that sub-band. That is, within the same sub-band, the target signal and the quasi-co-located reference signal satisfy a quasi-co-located relationship. When the target signal and the quasi-co-located reference signal are in different sub-bands, they do not satisfy the quasi-co-located parameters. For example, a target signal located in the first sub-band and a quasi-co-located reference signal located in the second sub-band do not satisfy a quasi-co-located relationship.

[0064] In one embodiment, any two signals satisfy one of the following: two signals in different subbands do not satisfy a quasi-co-address relationship; two signals whose frequency domain resource difference is greater than a first predetermined value do not satisfy a quasi-co-address relationship; two signals whose subband index difference is greater than a second predetermined value do not satisfy a quasi-co-address relationship; two signals belonging to different BWP groups in a serving cell do not satisfy a quasi-co-address relationship.

[0065] In this embodiment, two signals located in different sub-bands cannot establish a quasi-co-address relationship. Specifically, if two signals satisfy quasi-co-address, it means that the quasi-co-address parameters of one signal can be obtained from the quasi-co-address parameters of the other signal. Alternatively, if the frequency domain resource difference between the two signals is greater than a first predetermined value, then the two signals cannot establish a quasi-co-address relationship. Or, if the sub-band index difference between the two signals is greater than a second predetermined value, then the two signals cannot establish a quasi-co-address relationship.

[0066] The second communication node can configure which BWP signals in a serving cell can establish a QCL relationship. For example, two reference signals belonging to the same BWP group can establish a QCL relationship, while those belonging to different BWP groups cannot establish a QCL relationship.

[0067] In one embodiment, a precoding resource group of a signal is located in a subband, and the subband includes at least one precoding resource group.

[0068] In this embodiment, a precoding resource group for a signal can only reside in one subband, and a subband may include one or more precoding resource groups. A signal corresponds to the same precoding within a single precoding resource group.

[0069] Furthermore, the number of PRBs included in the PRG can be determined based on the subband size. For example, the larger the number of PRBs included in the subband, the larger the PRG can be; otherwise, the PRG will be smaller.

[0070] In one embodiment, a measurement reference signal corresponds to a set of Channel State Information (CSI) subband partitioning parameters and a set of subband partitioning parameters.

[0071] In this embodiment, a measurement reference signal can correspond to a set of CSI subband parameter divisions and a set of the aforementioned subband division parameters. One CSI subband is located within a subband, and a subband includes one or more CSI subbands. That is, a measurement reference signal resource corresponds to at least one of the following in different subbands: channel quality, quasi-co-address parameters. A measurement reference channel resource corresponds to at least one of the following in different CSI subbands: precoding matrix, Channel Quality Indicator (CQI). The CSI subband is a frequency domain coding of the channel considering multipath delay, while the aforementioned subbands (which can be called dispersive subbands) are caused by the propagation delay of multiple antennas within a single path. The delay spread of the former is generally greater than that of the latter. A dispersive subband includes one or more CSI subbands. The larger the delay spread, the more obvious the frequency domain change.

[0072] In one embodiment, the method further includes:

[0073] 160: Determine the subband of the target downlink measurement reference signal corresponding to the transmit filter that transmits the uplink target signal. The transmit filter is obtained based on the receive filter of the target downlink measurement reference signal on the determined subband.

[0074] In this embodiment, the first communication node needs to determine which downlink reference signal and which subband's receiving filter the uplink target signal's transmit filter is based on. Since the downlink reference signal may correspond to different receiving filters in different subbands, the first communication node must determine not only the downlink reference signal resource index of the uplink target signal's transmit filter, but also which subband's receiving filter is based on to obtain the reported transmit filter. This subband can be determined in one or more of the following ways: the first communication node determines it, and the second communication node indicates it via signaling. For example, the first communication node uses the channel quality of this downlink reference signal in each subband to select the subband with the best channel quality, and the receiving filter corresponding to this downlink reference signal becomes the uplink signal's transmit filter. Further, the first communication node can report the selected subband information to the second communication node. Further, the first communication node can determine the parameters for transmitting the uplink signal based on the distance between the subband occupied by the uplink target signal and the reference subband. The determined parameters include one or more of the following: quasi-co-address parameters, MCS, RV, frequency domain scheduling granularity, channel quality, PRG size, transmit filter, and power. Alternatively, the first and second communication nodes may agree to determine the transmission filter for the uplink target signal based on the receiving filter of the downlink reference signal resource in the subband where the uplink target signal is located.

[0075] In one embodiment, the method includes:

[0076] 170: Determine the sub-band of the target uplink measurement reference signal corresponding to the transmit filter that transmits the uplink target signal. The transmit filter is obtained based on the transmit filter of the target uplink measurement reference signal in the sub-band.

[0077] In this embodiment, the first communication node needs to determine which sub-band of the uplink measurement reference signal the transmission filter for transmitting the uplink target signal is based on. The same uplink reference signal has different transmission beams in different sub-bands, requiring further determination of which sub-band of the uplink measurement reference signal filter the first communication node's transmission filter for transmitting the uplink target reference signal is based on. In this case, one or more sub-band indices can be configured when configuring the spatial uplink reference signal for the uplink target signal.

[0078] Alternatively, it can be agreed that the subbands containing the uplink target signal and the reference signal associated with the uplink target signal's transmission filter meet predetermined characteristics, such as being in the same subband group or having the same subband index. The reference signal associated with the uplink target signal's transmission filter includes either the aforementioned downlink measurement reference signal or the uplink measurement reference signal.

[0079] In one embodiment, at least one subband satisfies at least one of the following: at least two subbands in a BWP include a Synchronization Signal Block (SSB); in a subband group, different SSB indices occupy different numbers of subbands.

[0080] In this embodiment, the number of subbands occupied by different SSB indices can be different. For example, some SSB indices occupy only one subband's resources, while others occupy multiple subbands. Figure 4 is a schematic diagram of the subbands occupied by an SSB according to an embodiment. As shown in Figure 4, each SSB index occupies resources in subband 2, but SSB2 also occupies frequency domain resources in subband 4, and SSB3 also occupies frequency domain resources in subbands 3 and 4. The other subbands occupied by SSB2 and SSB3 are located on one side of the SSB2 subband.

[0081] A BWP can contain synchronization signals, such as SSBs, in more than one subband (or subband group). SSBs in different subbands do not satisfy the QCL relationship. Figure 5 is a schematic diagram of another subband occupied by an SSB according to an embodiment. As shown in Figure 5, SSBs with the same Physical Cell Identifier (PCI) are located in subband 1 and subband 3. The base stations in subband 1 and subband 3 transmit the same set of SSB indices, both transmitting SSB0 to SSB3. In this embodiment, it is also possible that the sets of SSB indices transmitted in subband 1 and subband 3 are different. In Figure 5, each SSB index occupies the same number of subbands.

[0082] In some embodiments, it is also possible that the number of subbands occupied by each SSB is different. Figure 6 is a schematic diagram of another type of subband occupied by an SSB according to an embodiment. As shown in Figure 6, each subband group has a cluster of SSBs. SSBs in different subbands (or different subband groups) do not satisfy the QCL relationship. Subband group 0 (including subbands 0-4) and subband group 1 (including subbands 5-8) each include a group of SSBs. In Figure 6, the patterns of SSBs in different subband groups are the same. This embodiment does not exclude the situation where the patterns of SSBs in different subband groups are the same. For example, each subband group corresponds to a set of synchronization signal parameters. SSBs of the same PCI occupy resources in different subband groups. SSBs with the same SSB index in different subbands or different subband groups do not satisfy the quasi-co-location (QCL) relationship.

[0083] In one embodiment, determining subband parameters includes: receiving dynamic control signaling; and determining subband parameters based on the dynamic control signaling.

[0084] In one embodiment, determining the parameters of a signal in at least one sub-band based on sub-band parameters includes: if the number of sub-bands included in at least one sub-band is greater than 1, determining the parameters of the signal in each sub-band of at least one sub-band.

[0085] In one embodiment, a frequency domain bandwidth includes at most one subband; and / or, a measurement reference signal resource corresponds to a set of quasi-co-address parameters over a frequency domain bandwidth.

[0086] In this embodiment, a frequency domain bandwidth is limited to only one sub-band, and the same measurement reference signal resource (such as CSI-RS resource or SSB resource) corresponds to only one set of QCL parameters in a frequency domain bandwidth. Based on this, the 5G NR scheme can also be used when indicating QCL relationships, that is, assuming that the channel between a transceiver node and a terminal corresponds to only one optimal radio frequency transmit beam pair, or assuming that each candidate radio frequency beam is applicable to the entire bandwidth, assuming that the performance is not significantly different across the entire bandwidth, and that the corresponding optimal receive beam is the same across the entire bandwidth. However, it generally requires increasing the number of frequency domain bandwidths and increasing configuration signaling, and will cause frequent frequency domain bandwidth switching, increasing the complexity of the first communication node. For example, since different beam direction groups correspond to different sub-band sizes, different beam direction groups need to be configured with different frequency domain bandwidths. As the number of beam groups increases, the number of configured frequency domain bandwidths also increases. Moreover, other parameters in different frequency domain bandwidths are also configured independently for each frequency domain bandwidth. In fact, these other parameters are the same in these different frequency domain bandwidths and do not require additional configuration. If the parameter configuration architecture in 5G NR is used, other parameters need to be configured separately for each frequency domain bandwidth, such as channel parameters and demodulation reference signal parameters. However, if the signal transmission method of this application is adopted to determine signal parameters based on sub-bands, the transmitting end can use transmission parameters that are more closely matched to the actual channel, improving communication efficiency and reliability, avoiding frequent frequency domain bandwidth switching, and avoiding unnecessary duplication of parameter configuration.

[0087] Dispersion is the beam variation in the frequency domain caused by the propagation delay between antennas. Specifically, for a linear array with N antennas, in the i-th propagation path, the channel h between the n-th transmitting antenna and the receiver (or the scatterer) is... n,i It can be represented in the following form:

[0088] Where, τ n,i λ0 is the propagation delay between the nth transmitting antenna and the receiver (or scatterer), where n = 0, 1, ..., N-1. λ0 is the wavelength corresponding to the frequency domain f0. The antenna spacing d = αλ0, where α is a non-negative number, typically 0.5. λ1 is the wavelength at the frequency domain f1, c is the speed of light, c = λ1f1 = λ0f0. Δf is the size of the subband, k is the index of the subband, and f1 is any frequency domain other than f0. θ is the angle between the propagation path i and the transmitting antenna. From equation (1), it can be seen that the precoding angle corresponding to the channel... The precoding angle changes with the frequency domain position k. That is, for the same propagation path, different sub-bands correspond to different precoding angles. In traditional schemes, the precoding angle changes with the frequency domain because different propagation paths i correspond to different τ values. 0,iWhen multiple paths are superimposed, the precoding angle changes with the frequency domain, τ' n,i In the processing, λ0 and λ1 are considered to be approximately equal, so the channel simplifies to the following form:

[0089] That is, for a single propagation path, the precoding angle will not change with the frequency domain. This assumption is appropriate when the bandwidth is small, the number of antennas is small, and the antenna aperture is small. However, as the number of antennas increases, the antenna aperture increases, and the propagation bandwidth increases, the above assumption will lead to a significant performance loss.

[0090] In one embodiment, the subband parameters include at least one of the following: subband size, starting reference position of the first subband, number of subbands, index type of physical resource blocks (PRBs) included in the subband, and position of the reference subband; wherein the index type includes an index obtained based on the common reference position of the carrier or an index of a PRB in the set of PRBs included in the bandwidth portion (BWP).

[0091] In one embodiment, the signal parameters include at least one of the following parameters: quasi-co-address parameters, MCS, RV, frequency domain scheduling granularity, channel quality parameters, PRG size, transmit filter parameters, power parameters, range of occupied frequency domain resources PRB, maximum number of occupied PRBs, frequency domain resources, number of subbands occupied in a frequency domain bandwidth at a given time, allocation granularity of occupied frequency domain resources, and number of bits occupied in the signaling bit domain of the allocated frequency domain resources in the DCI.

[0092] In one embodiment, a frequency domain bandwidth includes at least one of the following: frequency domain resources included in a serving cell, frequency domain resources included in a BWP, frequency domain resources occupied by a signal, and frequency domain resources occupied by a signal at a given time.

[0093] In the embodiments of this application, the sub-bands mentioned above can also be referred to as: frequency domain unit, dispersive sub-band, quasi-co-address parameter sub-band, radio frequency beam sub-band, signal parameter sub-band, etc.

[0094] If a signal occupies frequency domain resources in different sub-bands at a given time, then this signal has different parameters in those sub-bands. These parameters include at least one of the following: quasi-co-address parameters, MCS, RV, frequency domain scheduling granularity, channel quality, PRG size, transmit filter, power, and frequency domain resources. Signals in different sub-bands must meet the above predetermined conditions, or there may be a limit to the maximum number of sub-bands a signal can occupy at a given time.

[0095] In the embodiments of this application, a moment can be one or more of the following: a time domain symbol (such as an OFDM symbol, or a single-carrier time domain symbol, or other formed symbols, where a time domain symbol corresponds to multiple frequency domain resources in the frequency domain), a time slot, a scheduling unit (including one or more time domain symbols), a transmission opportunity (including one or more time domain symbols, the number of time domain symbols included in different transmission opportunities may be different), a subframe, a frame, or other time units.

[0096] In this embodiment, for ease of description, the channel and reference signal are collectively referred to as signals. Signals include modulated signals transmitted in the channel, as well as various reference signals, synchronization signals, and random access signals. The channel includes at least one of the following: downlink data channel, downlink control channel, uplink data channel, and uplink control channel. The reference signal includes at least one of the following: demodulation reference signal and measurement reference signal.

[0097] In this embodiment of the application, the association between two pieces of information includes at least one of the following: one piece of information can be used to obtain another piece of information; one piece of information can be used to obtain the value range of another piece of information; and the combination of the values ​​of the two pieces of information satisfies a predetermined condition.

[0098] In this embodiment of the application, a frequency domain bandwidth can be one of the following: frequency domain resources included in a serving cell, frequency domain resources included in a BWP, frequency domain resources occupied by a signal, frequency domain resources occupied by a signal at a certain moment, frequency domain resources included in a serving cell group, and frequency domain resources included in a BWP group.

[0099] In this embodiment of the application, dynamic control signaling can also be referred to as DCI, or physical layer control information or signaling, etc.

[0100] This application also provides a signal transmission method. Figure 7 is a flowchart of another signal transmission method provided in one embodiment. This method can be applied to a second communication node. Technical details not described in detail in this embodiment can be found in any of the above embodiments.

[0101] As shown in Figure 7, the method includes:

[0102] In 210, the subband parameters are determined.

[0103] In step 220, parameters of a signal in at least one sub-band are determined based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth.

[0104] In 230, the signal is transmitted according to the parameters of the signal, and the transmission includes receiving or sending.

[0105] In one embodiment, determining subband parameters includes: sending control signaling, wherein the control signaling carries the subband parameters.

[0106] In one embodiment, the control signaling includes dynamic control signaling.

[0107] In one embodiment, the control signaling is included in the configuration signaling of setting parameters, the setting parameters including one of the following: frequency domain bandwidth, measurement reference signal resources, TCI status, the signal, measurement reference signal resource group, and TCI status group.

[0108] In one embodiment, the method further includes:

[0109] 240: Receive capability information sent by the first communication node, the capability information representing the maximum number of sub-bands corresponding to the signal at a given time and frequency domain bandwidth.

[0110] In one embodiment, determining the subband parameters includes:

[0111] Send control signaling, which carries parameters of at least one set of signals. The parameters of the at least one set of signals correspond to at least one subband. The parameters of each set of signals in the at least one set of signals correspond to one subband in the at least one subband. The parameters of different sets of signals in the at least one set of signals correspond to different subbands in the at least one subband.

[0112] This application also provides a signal transmission device. Figure 8 is a schematic diagram of the structure of a signal transmission device according to an embodiment. As shown in Figure 8, the signal transmission device includes: a first parameter determination module 310, configured to determine sub-band parameters; a second parameter determination module 320, configured to determine parameters of a signal in at least one sub-band based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth; and a transmission module 330, configured to transmit the signal according to the signal parameters, wherein the transmission includes receiving or sending.

[0113] In one embodiment, the sub-band parameters are configured in the configuration information of the setting parameters, which include one of the following: frequency domain bandwidth, measurement reference signal resources, TCI status, the signal, measurement reference signal resource group, and TCI status group.

[0114] In one embodiment, the first parameter determination module 310 is configured to: determine the set parameter corresponding to the signal; and determine the sub-band parameter corresponding to the signal based on the set parameter corresponding to the signal.

[0115] In one embodiment, in the DCI that schedules the signal, the setting parameters of the signal are associated with at least one of the following information regarding the frequency domain resources occupied by the signal: frequency domain range, allocation granularity, and number of bits occupied by the signaling bit domain.

[0116] In one embodiment, the second parameter determination module 320 is configured to: determine a sub-band occupied by the signal at a certain time and in a certain frequency domain bandwidth based on the sub-band parameters; the transmission module 330 is configured to: transmit the signal on the sub-band.

[0117] The parameters of the signal include the number of subbands occupied by the signal at a given time and within a given frequency bandwidth.

[0118] In one embodiment, the second parameter determination module 320 is configured to: determine one or more sub-bands occupied by the signal at a time and in a frequency domain bandwidth based on the sub-band parameters; the transmission module 330 is configured to: transmit the signal on the one or more sub-bands; wherein, when the number of sub-bands is greater than 1, the measurement reference signals associated with the signals in different sub-bands satisfy predetermined conditions; the parameters of the signal include the number of sub-bands occupied by the signal at a time and in a frequency domain bandwidth.

[0119] In one embodiment, the predetermined conditions include at least one of the following: satisfying a quasi-co-address relationship with respect to the first type of quasi-co-address parameters; belonging to a reference signal group; and the maximum number of measurement reference signals that do not satisfy a quasi-co-address relationship with respect to the first type of quasi-co-address parameters being less than a predetermined value.

[0120] In one embodiment, the second parameter determination module 320 is configured to: determine parameters of the signal on each sub-band based on the distance between each sub-band and a reference sub-band; and determine the size of the sub-band based on the distance between each sub-band and a reference sub-band.

[0121] In one embodiment, the frequency domain resources occupied by a signal at a given time are located in a sub-band.

[0122] In one embodiment, the frequency domain resources occupied by a signal at a given time are located in at least two sub-bands; wherein, each sub-band corresponds to a set of parameters of the signal.

[0123] In one embodiment, the device further includes:

[0124] The capability information determination module is configured to determine the capability information of the maximum number of sub-bands corresponding to the signal at a given time and frequency domain bandwidth.

[0125] The reporting module is configured to report the capability information to the second communication node.

[0126] In one embodiment, when the maximum number of subbands occupied by the signal is greater than 1, each subband is symmetrically distributed on both sides of the reference subband.

[0127] In one embodiment, a signal corresponds to a set of parameters in each of the at least one subband; and / or a signal does not satisfy a quasi-co-address relationship with respect to at least the second type of quasi-co-address parameters in different subbands of the at least one subband.

[0128] In one embodiment, the TCI state of the signal is configured with one of the following information: resource index of the quasi-co-located measurement reference signal, serving cell and target subband index of the quasi-co-located measurement reference signal; resource index of the quasi-co-located measurement reference signal, serving cell and BWP index of the quasi-co-located measurement reference signal; resource index of the quasi-co-located measurement reference signal, serving cell, BWP index and target subband index of the quasi-co-located measurement reference signal.

[0129] In one embodiment, any two signals satisfy one of the following: two signals in different subbands do not satisfy a quasi-co-address relationship; two signals whose frequency domain resource difference is greater than a first predetermined value do not satisfy a quasi-co-address relationship; two signals whose subband index difference is greater than a second predetermined value do not satisfy a quasi-co-address relationship; two signals belonging to different BWP groups in a serving cell do not satisfy a quasi-co-address relationship.

[0130] In one embodiment, a precoding resource group of the signal is located in a subband, and the subband includes at least one precoding resource group.

[0131] In one embodiment, a measurement reference signal corresponds to a set of Channel State Information (CSI) subband partitioning parameters and a set of subband partitioning parameters.

[0132] In one embodiment, the apparatus further includes: a first target determination module, configured to determine a subband of a target downlink measurement reference signal corresponding to a transmit filter that transmits an uplink target signal, wherein the transmit filter is obtained based on a receive filter of the target downlink measurement reference signal on the subband.

[0133] In one embodiment, the apparatus further includes a second target determination module, configured to determine a sub-band of a target uplink measurement reference signal corresponding to a transmit filter that transmits the uplink target signal, wherein the transmit filter is obtained based on the transmit filter of the target uplink measurement reference signal in the sub-band.

[0134] In one embodiment, the at least one subband satisfies at least one of the following: at least two subbands in a BWP include a synchronization signal block (SSB); in a subband group, different SSB indices occupy different numbers of subbands.

[0135] In one embodiment, the first parameter determination module 310 is configured to: receive dynamic control signaling; and determine the sub-band parameters based on the dynamic control signaling.

[0136] In one embodiment, the second parameter determination module 320 is configured to: determine the parameters of the signal in each sub-band of the at least one sub-band when the number of sub-bands included in the at least one sub-band is greater than 1.

[0137] In one embodiment, a frequency domain bandwidth may include at most one sub-band; and / or, a measurement reference signal resource may correspond to a set of quasi-co-address parameters over a frequency domain bandwidth.

[0138] In one embodiment, the subband parameters include at least one of the following: subband size, starting reference position of the first subband, number of subbands, index type of physical resource blocks (PRBs) included in the subband, and position of the reference subband; wherein the index type includes an index obtained based on the common reference position of the carrier or an index of a PRB in the set of PRBs included in the bandwidth portion (BWP).

[0139] In one embodiment, the parameters of the signal include at least one of the following parameters: quasi-co-address parameters, modulation and coding scheme (MCS), redundancy version (RV), frequency domain scheduling granularity, channel quality parameters, size of precoding resource group (PRG), transmit filter parameters, power parameters, range of occupied frequency domain resources (PRBs), maximum number of occupied PRBs, frequency domain resources, number of subbands occupied in a frequency domain bandwidth at a given time, allocation granularity of occupied frequency domain resources, and number of bits occupied in the signaling bit domain of the allocated frequency domain resources in the DCI.

[0140] In one embodiment, the frequency domain bandwidth includes at least one of the following:

[0141] The frequency domain resources included in a serving cell, the frequency domain resources included in a BWP, the frequency domain resources occupied by the signal, and the frequency domain resources occupied by the signal at a given moment.

[0142] The signal transmission device proposed in this embodiment and the signal transmission method proposed in the above embodiments belong to the same concept. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same effect as performing the signal transmission method.

[0143] This application also provides a signal transmission device. Figure 9 is a schematic diagram of another signal transmission device provided in one embodiment. As shown in Figure 9, the signal transmission device includes: a first parameter determination module 410, configured to determine sub-band parameters; a second parameter determination module 420, configured to determine parameters of a signal in at least one sub-band based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth; and a transmission module 430, configured to transmit the signal based on the signal parameters, wherein the transmission includes receiving or sending.

[0144] In one embodiment, the first parameter determination module 410 is configured to: send control signaling, wherein the control signaling carries the subband parameters.

[0145] In one embodiment, the control signaling includes dynamic control signaling.

[0146] In one embodiment, the control signaling includes configuration signaling for setting parameters, the setting parameters including one of the following: frequency domain bandwidth, measurement reference signal resources, TCI status, the signal, measurement reference signal resource group, and TCI status group.

[0147] In one embodiment, the device further includes a capability information receiving module, configured to receive capability information sent by a first communication node, the capability information representing the maximum number of sub-bands corresponding to the signal at a given time and frequency domain bandwidth of the first communication node.

[0148] In one embodiment, the first parameter determination module 410 is configured to: send control signaling, the control signaling carrying at least one set of parameters of the signal, the parameters of the at least one set of the signal corresponding to the at least one subband, each set of parameters of the signal corresponding to one subband of the at least one subband, and different sets of parameters of the signal corresponding to different subbands of the at least one subband.

[0149] The signal transmission device proposed in this embodiment and the signal transmission method proposed in the above embodiments belong to the same concept. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same effect as performing the signal transmission method.

[0150] This application also provides a communication node. Figure 10 is a schematic diagram of the hardware structure of a communication node provided in an embodiment. As shown in Figure 10, the communication node provided in this application includes a processor 510 and a memory 520. The processor 510 in the communication node can be one or more, and Figure 10 shows one processor 510 as an example. The memory 520 is configured to store one or more programs. The one or more programs are executed by the one or more processors 510, so that the one or more processors 510 implement the signal transmission method as described in the embodiment of this application.

[0151] The communication node also includes: a communication device 530, an input device 540, and an output device 550.

[0152] The processor 510, memory 520, communication device 530, input device 540 and output device 550 in the communication node can be connected by a bus or other means. Figure 10 shows an example of connection by bus.

[0153] Input device 540 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the communication node. Output device 550 may include display devices such as a display screen.

[0154] The communication device 530 may include a receiver and a transmitter. The communication device 530 is configured to perform information transmission and reception communication under the control of the processor 510.

[0155] The memory 520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the signal transmission method described in the embodiments of this application (e.g., the first parameter determination module 310, the second parameter determination module 320, and the transmission module 330 in the signal transmission device). The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the communication node, etc. Furthermore, the memory 520 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 520 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the communication node via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0156] This application also provides a storage medium storing a computer program that, when executed by a processor, implements any of the signal transmission methods described in this application. The method includes: determining sub-band parameters; determining parameters of a signal in at least one sub-band based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth; and transmitting the signal according to the signal parameters, the transmission including sending or receiving.

[0157] This application also provides a computer program storage product, including a computer program / instruction, which, when executed by a processor, implements any of the signal transmission methods described in this application.

[0158] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable CD-ROM, optical storage device, magnetic storage device, or any suitable combination thereof. The computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0159] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0160] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0161] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0162] This application also provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the signal transmission method as described in any of the above embodiments.

[0163] The above description is merely an exemplary embodiment of this application and is not intended to limit the scope of protection of this application.

[0164] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing portable web browsers, or vehicle-mounted mobile stations.

[0165] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0166] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0167] Any block diagram of logical flow in the accompanying drawings of this application may represent program operations, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program operations and logic circuits, modules, and functions. Computer programs may be stored in memory. Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD), etc.). Computer-readable media may include non-transitory storage media. Data processors may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

Claims

1. A signal transmission method, applied to a communication node, comprising: Determine the subband parameters; The parameters of the signal in at least one sub-band are determined based on the sub-band parameters, wherein the at least one sub-band belongs to a frequency domain bandwidth; The signal is transmitted according to the parameters of the signal, and the transmission includes receiving or sending.

2. The method according to claim 1, wherein, The sub-band parameters are configured in the configuration information of the setting parameters, and the setting parameters include one of the following: Frequency domain bandwidth, measurement reference signal resources, transmission configuration indication (TCI) status, the signal, measurement reference signal resource group, and TCI status group.

3. The method according to claim 2, wherein, Determining the subband parameters includes: Determine the set parameters corresponding to the signal; The sub-band parameters corresponding to the signal are determined based on the set parameters corresponding to the signal.

4. The method according to claim 2, wherein, In the downlink control information (DCI) that schedules the signal, the setting parameters corresponding to the signal and the frequency domain resources occupied by the signal are associated with at least one of the following: frequency domain range, allocation granularity, and number of bits occupied by the signaling bit domain.

5. The method according to claim 1, wherein, Determining the parameters of the signal in the at least one sub-band based on the sub-band parameters includes: Based on the sub-band parameters, a sub-band occupied by the signal at a given time and frequency domain bandwidth is determined; Transmitting the signal according to the parameters of the signal includes: The signal is transmitted on the one sub-band; The parameters of the signal include the number of subbands occupied by the signal at a given time and within a given frequency bandwidth.

6. The method according to claim 1, wherein, Determining the parameters of the signal in the at least one sub-band based on the sub-band parameters includes: The signal occupies at least one sub-band at a given time and frequency domain bandwidth, based on the sub-band parameters. Transmitting the signal according to the parameters of the signal includes: The signal is transmitted on at least one sub-band; Wherein, in response to the number of sub-bands being greater than 1, the measurement reference signals associated with the signals in different sub-bands meet predetermined conditions; The parameters of the signal include the number of sub-bands occupied by the signal at a given time and frequency domain bandwidth.

7. The method according to claim 6, wherein, The predetermined conditions include at least one of the following: Regarding the first type of quasi-co-address parameters, they satisfy the quasi-co-address relationship; It belongs to a reference signal group; The maximum number of measurement reference signals for the first type of quasi-co-address parameters that do not satisfy the quasi-co-address relationship is less than a predetermined value.

8. The method according to claim 1, wherein, Determining the parameters of the signal in the at least one sub-band based on the sub-band parameters includes at least one of the following: The parameters of the signal on each sub-band are determined based on the distance between each sub-band and the reference sub-band in the at least one sub-band; The size of a subband is determined based on the distance between each of the at least one subband and a reference subband.

9. The method according to claim 1, wherein, The frequency domain resources occupied by a signal at a given moment are located in a sub-band.

10. The method according to claim 1, wherein, A signal occupies frequency domain resources in at least two sub-bands at a given time. Each sub-band corresponds to a set of parameters for the signal.

11. The method according to claim 1, further comprising: Information on the ability to determine the maximum number of sub-bands corresponding to the signal at a given time and frequency domain bandwidth; The capability information is reported to the second communication node.

12. The method according to claim 1, wherein, In response to the maximum number of sub-bands occupied by the signal being greater than 1, multiple sub-bands are symmetrically distributed on both sides of the reference sub-band.

13. The method of claim 1, wherein at least one of the following is satisfied: A signal, in each of the at least one sub-band, corresponds to a set of parameters for the signal; A signal, in different subbands of the at least one subband, does not satisfy a quasi-co-address relationship with respect to at least the second type of quasi-co-address parameters.

14. The method according to claim 1, wherein, The TCI state of the signal is configured with one of the following information: The resource index of the quasi-co-located measurement reference signal, the serving cell where the quasi-co-located measurement reference signal is located, and the target sub-band index; Resource index of quasi-co-located measurement reference signal, serving cell and bandwidth portion (BWP) index of the quasi-co-located measurement reference signal; The resource index of the quasi-co-located measurement reference signal, the serving cell where the quasi-co-located measurement reference signal is located, the BWP index, and the target subband index.

15. The method according to claim 1, wherein, For every two signals, one of the following conditions must be met: Two signals located in different sub-bands do not satisfy the quasi-co-address relationship; Two signals whose frequency domain resource difference is greater than a first predetermined value do not satisfy the quasi-co-address relationship; Two signals whose subband index difference is greater than the second predetermined value do not satisfy the quasi-co-address relationship; two signals belonging to different BWP groups in the same serving cell do not satisfy the quasi-co-address relationship.

16. The method according to claim 1, wherein, A precoding resource group of a signal is located in a subband, and the subband includes at least one precoding resource group.

17. The method according to claim 1, wherein, One measurement reference signal corresponds to one set of Channel State Information (CSI) subband division parameters and one set of subband division parameters.

18. The method according to claim 1, further comprising: The subband of the target downlink measurement reference signal corresponding to the transmit filter for transmitting the uplink target signal is determined, and the transmit filter is obtained based on the receive filter of the target downlink measurement reference signal on the subband.

19. The method according to claim 1, further comprising: The sub-band of the target uplink measurement reference signal corresponding to the transmit filter for transmitting the uplink target signal is determined, and the transmit filter is obtained based on the transmit filter of the target uplink measurement reference signal in the sub-band.

20. The method according to claim 1, wherein, The at least one sub-band satisfies at least one of the following: At least two sub-bands in a BWP include a synchronization signal block (SSB); Within a subband group, different SSB indexes occupy different numbers of subbands.

21. The method according to claim 1, wherein, Determining the subband parameters includes: Receive dynamic control signaling; The subband parameters are determined based on the dynamic control signaling.

22. The method according to any one of claims 1-21, wherein, Determining the parameters of the signal in the at least one sub-band based on the sub-band parameters includes: In response to the fact that the number of subbands included in the at least one subband is greater than 1, the parameters of the signal are determined on each subband of the at least one subband.

23. The method according to any one of claims 1-21, satisfying at least one of the following: A frequency domain bandwidth may include at most one sub-band; A measurement reference signal resource corresponds to a set of quasi-co-address parameters over a frequency domain bandwidth.

24. The method according to any one of claims 1-21, wherein, The subband parameters include at least one of the following: Subband size, starting reference position of the first subband, number of subbands, index type of physical resource blocks (PRBs) included in the subband, and position of the reference subband; The index type includes an index obtained based on the common reference position of the carrier or an index of a PRB in the PRB set included in the BWP.

25. The method according to any one of claims 1-21, wherein, The parameters of the signal include at least one of the following parameters: Quasi-co-address parameters, modulation and coding scheme (MCS), redundancy version (RV), frequency domain scheduling granularity, channel quality parameters, size of precoding resource group (PRG), transmit filter parameters, power parameters, range of occupied frequency domain resources (PRBs), maximum number of occupied PRBs, frequency domain resources, number of subbands occupied in a frequency domain bandwidth at a given time, allocation granularity of occupied frequency domain resources, and number of bits occupied in the signaling bit domain of the allocated frequency domain resources in the DCI.

26. The method according to any one of claims 1-21, wherein, The frequency domain bandwidth includes at least one of the following: The frequency domain resources included in a serving cell, the frequency domain resources included in a BWP, the frequency domain resources occupied by the signal, and the frequency domain resources occupied by the signal at a given moment.

27. The method according to claim 1, wherein, Determining the subband parameters includes: Send control signaling, the control signaling carrying the subband parameters.

28. The method according to claim 27, wherein, The control signaling includes dynamic control signaling.

29. The method according to claim 27, wherein, The control signaling is included in the configuration signaling of the setting parameters, and the setting parameters include one of the following: Frequency domain bandwidth, measurement reference signal resources, TCI status, the signal, measurement reference signal resource group, TCI status group.

30. The method according to claim 1, further comprising: The capability information sent by the first communication node is received, wherein the capability information represents the maximum number of sub-bands corresponding to the signal at a given time and frequency domain bandwidth.

31. The method according to claim 1, wherein, Determining the subband parameters includes: Send control signaling, the control signaling carrying parameters of at least one set of signals, the parameters of the at least one set of signals corresponding to the at least one subband, the parameters of each set of signals in the at least one set of signals respectively corresponding to one subband in the at least one set of signals, and the parameters of different sets of signals in the at least one set of signals corresponding to different subbands in the at least one set of signals.

32. A communication node, comprising: Memory, and at least one processor; The memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the signal transmission method as described in any one of claims 1-31.

33. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the signal transmission method as described in any one of claims 1-31.

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