Signal transmission method, communication node and storage medium

Abstract

The invention provides a signal transmission method, a communication node and a storage medium. The method includes determining sub-band parameters; determining a parameter of a signal in at least one sub-band according to the sub-band parameter, the at least one sub-band belonging to a frequency domain bandwidth; and transmitting the signal according to the parameter of the signal, wherein the transmission comprises receiving or sending.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, for example to a signal transmission method, a communication node and a storage medium. BACKGROUND

[0002] In the existing 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 transmission beam pair; if the terminal is allowed to feed back multiple candidate radio frequency beam pairs, which are used to resist temporary blocking of some optimal beam pairs or for multi-user scheduling on the base station side, and it is assumed that each candidate radio frequency beam is applicable to the entire bandwidth, the performance difference is small on the entire bandwidth, and the corresponding optimal receiving beam is the same on the entire bandwidth. With the continuous development of wireless communication technology, the number of antennas and communication bandwidth used by future 5G-A or 6G increases, and the dispersion phenomenon is obvious. Due to the influence of dispersion, the corresponding transmitting end beam is different at different frequency domain positions, and the receiving end beam may also be different, and the dispersion bandwidth of different beams is different. The matching degree of the above assumption that one radio frequency beam is suitable for the entire bandwidth and the actual channel is reduced, resulting in reduced communication performance. SUMMARY

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

[0004] The present application provides a signal transmission method, a communication node and a storage medium.

[0005] determining sub-band parameters;

[0006] determining parameters of a signal in at least one sub-band according to the sub-band parameters, wherein the at least one sub-band belongs to one frequency domain bandwidth;

[0007] transmitting the signal according to the parameters of the signal, wherein the transmission includes receiving or transmitting.

[0008] The present application also provides a communication node, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above-mentioned signal transmission method when executing the program.

[0009] The present application also provides a computer-readable storage medium, which stores a computer program, and the program is executed by a processor to implement the above-mentioned signal transmission method. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 A schematic diagram of a transmitting beam and a receiving beam is provided for an embodiment;

[0011] Figure 2 Another schematic diagram of a transmitting beam and a receiving beam provided for an embodiment;

[0012] Figure 3 A flowchart of a signal transmission method provided for an embodiment;

[0013] Figure 4 A schematic diagram of a sub-band occupied by an SSB provided for an embodiment;

[0014] Figure 5 Another schematic diagram of a sub-band occupied by an SSB provided for an embodiment;

[0015] Figure 6 Yet another schematic diagram of a sub-band occupied by an SSB provided for an embodiment;

[0016] Figure 7 A flowchart of another signal transmission method provided for an embodiment;

[0017] Figure 8 A structural schematic diagram of a signal transmission apparatus provided for an embodiment;

[0018] Figure 9 A structural schematic diagram of another signal transmission apparatus provided for an embodiment;

[0019] Figure 10 A hardware structural schematic diagram of a communication node provided for an embodiment. DETAILED DESCRIPTION

[0020] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein merely serve to explain the present application, but not to limit the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other as long as there is no conflict. In addition, it should be noted that only the parts related to the present application are shown in the drawings for the convenience of description, rather than all the structures.

[0021] Due to the influence of dispersion, the corresponding transmitting beams at different frequency domain positions are different, and the receiving beams at the receiving end can also be different. Figure 1 and Figure 2 are schematic diagrams of transmitting beams and receiving beams. As Figure 1 and Figure 2As shown, the optimal transmission beam and the optimal reception beam of the corresponding service node (network side node, such as a base station) on different subbands can be different. In addition, the dispersion bandwidths of different beams are different, for example, the dispersion bandwidth corresponding to a small-angle beam is relatively large, the dispersion bandwidth corresponding to a large-angle beam is relatively small, the dispersion subband corresponding to the small-angle beam 0 is larger than the subband corresponding to the large-angle beam 10, so for the beam 0, the subband corresponding to one BWP is divided into 4 subbands, as shown in Figure 1 For the beam 10, the subband corresponding to one BWP is divided into 5 subbands, as shown in Figure 2 Generally, the corresponding optimal transmission beams on each subband are beams with similar angles. The larger the frequency domain interval between two subbands, the larger the angle difference between the corresponding optimal beams on the two subbands. The above transmission beam can be a radio frequency transmission beam, and the reception beam can be a radio frequency reception beam. With the increase of the number of communication antennas and the bandwidth, this phenomenon is more obvious. If the existing scheme is followed, assuming that the channel between one transceiver node and one terminal corresponds to only one optimal radio frequency transmission beam pair, assuming that each candidate radio frequency beam is applicable to the entire bandwidth, assuming that the performance difference is not large on the entire bandwidth, and assuming that the corresponding optimal reception beam is the same on the entire bandwidth, the dispersion phenomenon of the actual channel cannot be well matched. Therefore, the signal transmission method provided by the embodiments of the present application determines the signal parameters based on the subband parameters, so that the transmission end can use transmission parameters that are more matched to the actual channel, thereby improving the communication efficiency and reliability. The solution provided by the present application can also be applied to scenarios where the radio frequency beam in the frequency domain changes obviously with the frequency domain due to non-dispersion factors, such as scenarios where the optimal radio frequency beam corresponding to different frequency domain positions changes obviously due to multipath superposition factors. The solution provided by the present application can also be used in such scenarios.

[0022] In the embodiments of the present application, the first communication node can be understood as one end that can be controlled in the signal transmission process, and the second communication node can be understood as one end with a control function. For example, the second communication node can send control signaling to the first communication node to indicate related parameters of signal transmission. In one example, the first communication node can be a user side device, such as a user equipment (User Equipment, UE), a mobile terminal, a mobile phone, or a computing device, etc.; the second communication node can be a network side device, such as a service node, a mobile terminal, or an access point, etc.; for a downlink signal, the first communication node is the receiving end, and the second communication node is the transmitting end; for an uplink signal, the first communication node is the transmitting end, and the second communication node is the receiving end.

[0023] Figure 3 A flowchart of a signal transmission method provided by an embodiment is shown in the figure, and the method can be applied to a first communication node. As shown in Figure 3 The method provided by the embodiment includes the following steps:

[0024] In step 110, a sub-band parameter is determined.

[0025] In step 120, a parameter of a signal in at least one sub-band is determined according to the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth.

[0026] In step 130, the signal is transmitted according to the parameter of the signal, and the transmission includes receiving or sending.

[0027] In this embodiment, the first communication node can transmit the signal (which can also be referred to as a target signal) according to the determined parameter of the signal corresponding to the sub-band. The sub-band parameter corresponding to the frequency domain bandwidth to which the determined sub-band belongs can be informed 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 can be determined from configuration information of the set parameter. The DCI can also be referred to as physical layer control information or physical layer control signaling, and can also be referred to as dynamic control information or dynamic control signaling, etc.

[0028] In an embodiment, the sub-band parameter is configured in the configuration information of the set parameter, and the set parameter includes one of the following: a frequency domain bandwidth, a measurement reference signal resource, a Transmission Configuration Indication (TCI) state, a signal, a measurement reference signal resource group, and a TCI state group.

[0029] For example, determining the sub-band parameter can be determining the sub-band parameter corresponding to one frequency domain bandwidth. For example, one or more of the following sub-band division parameters can be determined: a sub-band size, a starting reference position of the first sub-band, a number of sub-bands, whether the physical resource block (PRB) index included in the sub-band is an index obtained from a common reference position in a component carrier (CC) or an index in a BWP set included in a bandwidth part (BWP). More than one sub-band can be included in one frequency domain bandwidth.

[0030] The sub-band parameter can be determined according to at least one of the following: signaling information informed by the second communication node, information fed back by the first communication node, a reference signal resource index, and the above-mentioned configuration information of the set parameter.

[0031] The second communication node can establish a relationship between a reference signal resource index and a sub-band division parameter (i.e., a sub-band parameter), different reference signal resource indexes corresponding to different sub-band division parameters. In the case of determining the sub-band parameter from the configuration information of the set parameter, for the sub-band parameter of a frequency domain bandwidth, it can be dynamically changed, or changed with the change of the preset parameter. The sub-bands obtained according to a set of sub-band division parameters are different in that different sub-bands include different PRB sets, and each sub-band includes consecutive PRBs, and each PRB in the frequency domain bandwidth is included in a sub-band. That is, the sub-band divides the PRBs in a frequency domain bandwidth into several consecutive sub-bands, each sub-band includes consecutive PRBs, and except for the first and last two sub-bands (or one or more sub-bands in the middle), the number of PRBs included in other sub-bands is the same. Or in some scenarios, the size of the sub-band is determined according to the distance (or the distance from the reference frequency domain position) from the reference sub-band, and the farther the distance from the reference sub-band or the reference frequency, the smaller the sub-band. A frequency domain bandwidth can include more than one sub-band, and the same radio frequency transmitting beam of the second communication node matches different channel paths on different sub-bands, thereby having different quasi co-location (QCL) parameters.

[0032] For example, determining the sub-band parameter can be determining the sub-band parameter corresponding to a measurement reference signal resource or resource group, such as configuring the sub-band parameter corresponding to the measurement reference signal resource or resource group when configuring the measurement reference signal resource or resource group. Further, the sub-band parameter of a target signal is obtained according to the sub-band parameter corresponding to the quasi co-location measurement reference signal of the target signal, wherein the quasi co-location measurement reference signal is a measurement reference signal. If the above correspondence is configured by RRC signaling, then the transmitting beam (or transmitting beam group) corresponding to a measurement reference signal cannot be flexibly changed, because different transmitting beams (or transmitting beam groups) of the second communication node will correspond to different sub-band parameters. However, if the sub-band parameter corresponding to a measurement reference signal resource or resource group is dynamically configured by MAC-CE signaling or DCI signaling, then the transmitting beam (or transmitting beam group) of the base station corresponding to a measurement reference signal resource or resource group can be flexibly changed.

[0033] For example, the determining the sub-band parameter can be determining the sub-band parameter corresponding to the TCI state of the second communication node. For example, when the TCI state is configured, the sub-band parameter corresponding to the TCI state is configured. The sub-band parameter of a target signal is obtained according to the sub-band parameter in the TCI state corresponding to the target signal. The TCI state is a logical unit for configuring the quasi co-location measurement reference signal. The measurement reference signal resource index corresponding to the quasi co-location measurement reference signal is configured in the TCI state. If the correspondence is RRC configured, the transmission beam corresponding to a measurement reference signal resource can change, and the transmission beam corresponding to a TCI state index basically cannot change. For example, the same measurement reference signal resource is associated with multiple TCI states. In the case that different TCI states are activated, the second communication node can transmit the measurement reference signal resource by using different transmission beams. However, if the sub-band parameter corresponding to the TCI state can be configured by the MAC-CE signaling, the transmission beam corresponding to the TCI state can change.

[0034] For example, the sub-band parameter corresponding to the signal can be notified in the DCI scheduling the target signal. Because the transmission beam used for transmitting the target signal is different, the corresponding sub-band parameter is notified by the DCI, and dynamic change can be realized.

[0035] In an embodiment, the determining the sub-band parameter comprises:

[0036] Step 1110: determining the configuration parameter corresponding to the signal;

[0037] Step 1120: determining the sub-band parameter corresponding to the signal according to the configuration parameter corresponding to the signal.

[0038] In an embodiment, in the DCI scheduling the signal, the configuration parameter corresponding to the signal is associated with at least one of the following information of the frequency domain resource occupied by the signal: frequency domain range, allocation granularity, and bit number of the bit field occupied by the signaling.

[0039] For example, the TCI state of the signal is associated with the frequency domain resource occupied by the signal. If the TCI state of the signal is notified by the DCI, the bit field of the frequency domain resource of the signal notified in the DCI is associated with the bit field of the TCI state of the signal notified in the DCI. For example, according to the TCI state value notified in the TCI state bit field, at least one of the following is determined in the DCI: the frequency domain range corresponding to the frequency domain resource field, the allocation granularity of the frequency domain resource, and the bit number of the bit field occupied by the frequency domain resource. Alternatively, the TCI state set corresponding to the TCI bit field can also be determined according to the frequency domain parameter corresponding to the downlink signal notified in the DCI.

[0040] In an embodiment, determining the parameter of the signal in the at least one sub-band according to the sub-band parameter comprises:

[0041] determining one sub-band occupied by the signal at one time and one frequency domain bandwidth according to the sub-band parameter;

[0042] transmitting the signal according to the parameter of the signal, comprising: transmitting the signal on the one sub-band;

[0043] wherein the parameter of the signal comprises a number of sub-bands occupied by the signal at one time and one frequency domain bandwidth.

[0044] In this embodiment, the first communication node can only transmit the signal on one sub-band in one frequency domain bandwidth at one time. At this time, the signal in one sub-band can be one signal or multiple signals.

[0045] In an embodiment, determining the parameter of the signal in the at least one sub-band according to the sub-band parameter comprises:

[0046] determining one or more sub-bands occupied by the signal at one time and one frequency domain bandwidth according to the sub-band parameter;

[0047] transmitting the signal according to the parameter of the signal, comprising: transmitting the signal on the one or more sub-bands;

[0048] wherein, in the case where the number of sub-bands is greater than 1, the measurement reference signals associated with the signals in different sub-bands satisfy a predetermined condition; the parameter of the signal comprises a number of sub-bands occupied by the signal at one time and one frequency domain bandwidth, and the measurement reference signal is the quasi co-location measurement reference signal of the signal. At this time, the signals in multiple sub-bands can be one signal or multiple signals, and each signal in the multiple signals occupies one or more sub-bands in the multiple sub-bands.

[0049] In this embodiment, the terminal can transmit the signal on one or more sub-bands in one frequency domain bandwidth at one time. If the signals on multiple sub-bands are transmitted, the measurement reference signals associated with the signals in different sub-bands satisfy a predetermined condition.

[0050] In an embodiment, the predetermined condition comprises at least one of the following:

[0051] the first type of quasi co-location parameters (QCL-Type D) associated with the signals on multiple sub-bands satisfy a QCL relationship;

[0052] the measurement reference signals associated with the signals in different sub-bands belong to one reference signal group;

[0053] the maximum number of measurement reference signals that do not satisfy the QCL relationship with respect to the first type of quasi co-location parameters is less than a predetermined value.

[0054] In this embodiment, if the first communication node needs to transmit multiple signals at one time, the subbands obtained according to the subband parameters of the multiple signals are different, such as different subband sizes. One implementation is to require that the subband parameters corresponding to the multiple signals transmitted by the first communication node on one frequency domain bandwidth at one time be the same. Another implementation is that the multiple signals each have their own subband parameters, and the signals are transmitted according to the respective subband parameters, but the multiple signals associated with the QCL measurement reference signals are required to satisfy the predetermined condition. Among them, QCL-Type D is a large-size parameter spatial domain reception filtering parameter. Another implementation is that if the first communication node needs to transmit multiple subband signals at one time, the second communication node can further instruct the first communication node to take the QCL-Type D of which subband as the QCL-Type D parameter on the entire frequency domain bandwidth. This subband can be referred to as a reference subband.

[0055] In an embodiment, determining the parameters of the signals in the at least one subband according to the subband parameters includes at least one of the following:

[0056] Determining the parameters of the signals on each subband according to the distance between each subband and the reference subband;

[0057] Determining the size of each subband according to the distance between each subband and the reference subband.

[0058] In this embodiment, the first communication node can adjust the signal parameters in each subband according to the distance between the subband and the reference subband, and the signal parameters include one or more of the following parameters: quasi co-location parameters, modulation and coding scheme (MCS), redundancy version (RV), frequency domain scheduling granularity, channel quality, size of precoding resource block group (PRG), transmission filter, and power. Different subbands correspond to different signal parameters, or different subbands are based on the same set of signal parameters and the above distance, and the parameters of the signals on each subband are obtained respectively.

[0059] In an embodiment, the frequency domain resource occupied by one signal at one time is located in one subband.

[0060] In an embodiment, the frequency domain resource occupied by one signal at one time is located in at least two subbands; wherein different subbands correspond to a set of signal parameters respectively.

[0061] The parameters of the signal include at least one of the following: quasi co-location parameters, MCS, RV, frequency domain scheduling granularity, channel quality, size of PRG, transmit filter, and power. For example, one channel state information reference signal (CSI-RS) resource can occupy multiple subbands, and the CSI-RS on different subbands corresponds to a set of QCL parameters, where the QCL parameters include large-scale parameters of a channel, such as one or more of the following: Doppler shift, Doppler spread, average delay, delay spread, and spatial Rx parameter. For example, the maximum number of subbands occupied by the PDSCH at one time is determined, and the maximum number can be one or more. The maximum number is determined according to at least one of the following: configuration of the second communication node, feedback of the first communication node, and a predetermined value. For example, the first communication node has multiple panels, and different panels are used to generate a receive beam for receiving the PDSCH on different subbands. For example, panel 1 generates a receive beam 1 for receiving the PDSCH on subband 1, and panel 2 generates a receive beam 2 for receiving the PDSCH on subband 2. The first communication node can generate a maximum of two different receive beams at one time. This capability can be UE specific, carrier frequency specific, or carrier frequency group specific. In the case where the PDSCH occupies more than one subband, the PDSCH corresponds to a set of signal parameters in each subband.

[0062] In an embodiment, the method further includes:

[0063] Step 140: determining the capability information of the maximum number of subbands corresponding to the signal at one time and in one frequency domain bandwidth.

[0064] Step 150: reporting the capability information to the second communication node.

[0065] In this embodiment, the first communication node can feed back the capability information of the maximum number of subbands that can be transmitted at one time and in one frequency domain bandwidth. This capability can be UE specific, carrier frequency specific, or carrier frequency group specific.

[0066] In this embodiment, the first communication node reports the capability information associated with a measurement reference signal resource. For different measurement reference signal resources, the first communication node can report one capability information respectively. The capability information includes at least one of the following parameters: a sub-band parameter or the number of sub-bands that the first communication node can transmit signals on at one time and in one frequency domain bandwidth, and the signals satisfy a quasi-co-location relationship with the measurement reference signal resource. For example, when a terminal performs downlink channel measurement, a measurement reference signal resource is selected, and the capability information corresponding to the measurement reference signal resource is reported.

[0067] In this embodiment, the first communication node feeds back which sub-bands the first communication node can transmit simultaneously.

[0068] There are several ways to determine the reference sub-band. In one implementation, the reference sub-band (for example, the sub-band corresponding to f_0 in formula (1) below) is CC level, and in this case, the second communication node radio frequency transmission beam is determined based on the channel matching the signal in the reference sub-band. In another implementation, the reference sub-band is BWP level, and in this case, the second communication node radio frequency transmission beam is determined based on the channel matching the signal in the reference sub-band in the BWP. In another implementation, the reference sub-band can also be determined at the signal level, or the reference sub-band index can change over time. The second communication node can dynamically notify the PRB index included in the reference sub-band. The PRBs included in other sub-bands are symmetrically expanded to both sides based on the reference sub-band. On this basis, the sub-band to which the radio frequency transmission beam of the second communication node is aligned can change dynamically at each time. The sub-band to which the radio frequency transmission beam of the second communication node is aligned can be referred to as the reference sub-band. The farther the sub-band is from the reference sub-band, the lower the matching degree (for example, the correlation value) between the channel and the radio frequency transmission beam of the second communication node.

[0069] It should be noted that for uplink transmission, the first communication node can report the number of sub-bands that the first communication node can transmit signals on at one time and in one frequency domain bandwidth, that is, the maximum number of transmitted sub-bands. For downlink transmission, the first communication node can report the number of sub-bands that the first communication node can receive signals on at one time and in one frequency domain bandwidth, that is, the maximum number of received sub-bands.

[0070] In one embodiment, when the maximum number of sub-bands occupied by the signal is greater than 1, the sub-bands are symmetrically distributed on both sides of the reference sub-band.

[0071] In the case that the maximum number of subbands occupied by a signal is greater than 1, the multiple subbands are symmetrically distributed on both sides of the reference subband, or the maximum number refers to the number of subbands on one side of the reference subband, for example, the number of subbands on each side of the reference subband cannot exceed the maximum number determined above. The PDSCH can occupy subbands on either side of the reference subband or on both sides, but the number of subbands on either side of the reference subband cannot exceed the above-mentioned capability number.

[0072] In an embodiment, one signal corresponds to a set of parameters of a signal in each of at least one subband, and / or one signal in different subbands of at least one subband does not satisfy the quasi-co-location relationship with respect to the second type of quasi-co-location parameters.

[0073] In the embodiment, in the case that one signal occupies multiple subbands, each subband corresponds to a set of parameters of a target signal, and in an embodiment, the signals in different subbands satisfy the quasi-co-location relationship with respect to the first type of quasi-co-location parameters and do not satisfy the quasi-co-location relationship with respect to the second type of quasi-co-location parameters, for example, the first type of quasi-co-location parameters include at least one of the following: receive filter, Doppler shift, Doppler spread; and the second type of quasi-co-location parameters include at least one of the following: Doppler shift, Doppler spread, average delay, delay spread, average gain.

[0074] In an embodiment, the following information is configured in the TCI state of a signal:

[0075] Resource index of the quasi-co-location measurement reference signal, serving cell where the quasi-co-location measurement reference signal is located, and target subband index;

[0076] Resource index of the quasi-co-location measurement reference signal, serving cell where the quasi-co-location measurement reference signal is located, and BWP index;

[0077] Resource index of the quasi-co-location measurement reference signal, serving cell where the quasi-co-location measurement reference signal is located, BWP index, and target subband index.

[0078] In this embodiment, when indicating the quasi co-location reference signal of the indication signal, it can be further determined that the quasi co-location parameter of the target signal is obtained based on the quasi co-location parameter of the sub-band in which the quasi co-location reference signal is located, such as indicating the resource index of the quasi co-location reference signal, the serving cell in which the quasi co-location reference signal is located, and the sub-band index in the TCI state. In this case, the reference starting point of the sub-band is defined at the serving cell level. The resource index of the quasi co-location reference signal, the serving cell in which the quasi co-location reference signal is located, and the BWP index can also be indicated in the TCI state. In this case, it is required that a quasi co-location reference signal occupies only one sub-band in a BWP. The resource index of the quasi co-location reference signal, the serving cell in which the quasi co-location reference signal is located, the BWP index, and the sub-band index can also be indicated in the TCI state. In this case, a quasi co-location reference signal can occupy PRBs in multiple sub-bands in a BWP. The resource index of the quasi co-location reference signal, i.e., the index of the quasi co-location reference signal resource in which the quasi co-location reference signal is located.

[0079] The quasi co-location reference signal resource can be a measurement reference signal resource. A measurement reference signal resource is a logical unit in which a second communication node configures a measurement reference signal. The measurement reference signal resource is configured with time domain, frequency domain, code domain, and / or power information corresponding to the measurement reference signal. The measurement reference signal resource can also be configured with spatial domain resources corresponding to the measurement reference signal, such as the quasi co-location reference signal of the measurement reference signal. The channel large-scale parameters of the measurement reference signal are obtained based on the quasi co-location reference signal corresponding to the measurement reference signal. Alternatively, the second communication node agrees that the quasi co-location parameter of the target signal in a sub-band is obtained based on the quasi co-location parameter of the quasi co-location reference signal of the target signal in the sub-band. That is, in the same sub-band, the target signal and the quasi co-location reference satisfy the quasi co-location relationship. When the sub-bands in which the target signal and the quasi co-location reference signal are located are different, the target signal and the quasi co-location reference signal do not satisfy the quasi co-location parameter in different sub-bands. For example, the target signal located in the first sub-band and the quasi co-location reference signal located in the second sub-band do not satisfy the quasi co-location relationship. The target signal located in the first sub-band and the quasi co-location reference signal located in the first sub-band do not satisfy the quasi co-location relationship.

[0080] In an embodiment, any two signals satisfy one of the following:

[0081] Two signals in different sub-bands do not satisfy the quasi co-location relationship;

[0082] Two signals whose frequency domain resources differ by more than a first predetermined value do not satisfy the quasi co-location relationship;

[0083] Two signals whose sub-band indexes differ by more than a second predetermined value do not satisfy the quasi co-location relationship;

[0084] Two signals belonging to different BWP groups in one cell do not satisfy the quasi co-location relationship.

[0085] In this embodiment, two signals in different sub-bands cannot establish a quasi-co-location relationship, where the two signals satisfy quasi-co-location, indicating that the quasi-co-location parameters of one signal can be obtained based on the quasi-co-location parameters of the other signal; or if the frequency domain resource difference between the two signals is greater than a first predetermined value, the quasi-co-location parameters cannot be established between the two signals; or if the sub-band index difference between the two signals is greater than a second predetermined value, the quasi-co-location parameters cannot be established between the two signals.

[0086] The second communication node can configure which BWPs in a serving cell (Serving Cell) can establish a QCL relationship between the signals D. 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.

[0087] In one embodiment, a precoding resource group of a signal is located in a sub-band, and a sub-band includes at least one precoding resource group.

[0088] In this embodiment, the precoding resource group of one signal can only be located in one sub-band, and one sub-band can include one or more precoding resource groups. One signal corresponds to the same precoding in one precoding resource group.

[0089] Furthermore, the number of PRBs included in the PRG may be determined according to the subband size. For example, the larger the number of PRBs included in the subband, the larger the PRG may be; otherwise, the smaller the PRG may be.

[0090] In one embodiment, one sounding reference signal corresponds to a set of channel state information (CSI) sub-band partitioning parameters and a set of sub-band partitioning parameters.

[0091] In this embodiment, one measurement reference signal can correspond to one set of CSI subband parameter division and one set of the above-mentioned subband division parameters, wherein one CSI subband is located in one subband, and one subband includes one or more CSI subbands. That is, one measurement reference signal resource corresponds to different at least one of the following on different subbands: channel quality, quasi co-location parameters. One measurement reference channel resource corresponds to different at least one of the following in different CSI subbands: precoding matrix, channel quality indicator (CQI). Wherein, the CSI subband is to consider the channel frequency domain coding caused by multipath delay, and the above-mentioned subband (which can be called dispersion subband) is caused by the propagation delay of multiple antennas within a single path, and the time delay spread of the former is generally greater than that of the latter, and one dispersion subband includes one or more CSI subbands. The greater the time delay spread, the more obvious the frequency domain change.

[0092] In an embodiment, the method further comprises:

[0093] Step 160: determining the subband of the target downlink measurement reference signal corresponding to the transmission filter of the uplink target signal, wherein the transmission filter is obtained based on the reception filter of the target downlink measurement reference signal on the determined subband.

[0094] In this embodiment, the first communication node needs to determine which reception filter of which subband of which downlink reference signal is used to obtain the transmission filter of the uplink target signal, wherein one downlink reference signal can correspond to different reception filters on different subbands. Therefore, the first communication node not only needs to determine the downlink reference signal resource index of the transmission filter of the uplink target signal, but also needs to determine which reception filter of which subband of this downlink reference signal resource is used to obtain the transmission filter. This subband can be determined in one or more of the following ways: the first communication node determines, and the second communication node indicates through signaling. For example, the first communication node selects the reception filter corresponding to the downlink reference signal on the subband with the best channel quality, and the transmission filter of the uplink signal is obtained based on the reception filter. Further, the first communication node can report the information of the selected subband to the second communication node. Further, the first communication node can determine the parameters of the transmission of the uplink signal according to the distance between the subband occupied by the uplink target signal and the reference subband, and the determined parameters include one or more of the following: quasi co-location parameter, MCS, RV, frequency domain scheduling granularity, channel quality, PRG size, transmission filter, power. Or the first communication node and the second communication node agree that the transmission filter of the uplink target signal is determined based on the reception filter of the downlink reference signal resource on the subband where the uplink target signal is located.

[0095] In an embodiment, the method comprises:

[0096] Step 170: determining a subband of a target uplink measurement reference signal corresponding to a transmission filter of a target uplink signal, the transmission filter being obtained based on a transmission filter of the target uplink measurement reference signal in the subband.

[0097] In this embodiment, the first communication node needs to determine which subband of the uplink measurement reference signal the transmission filter of the target uplink signal is obtained based on. Different transmission beams of the same uplink reference signal in different subbands are further determined. The transmission filter of the target uplink reference signal of the first communication node is obtained based on which subband of the uplink measurement reference signal filter. In this case, when the spatial domain uplink reference signal of the target uplink signal is configured, one or more subband indexes can be configured.

[0098] It can also be agreed that the subband of the reference signal associated with the transmission filter of the target uplink signal satisfies a predetermined feature, such as in a subband group or having the same subband index. The reference signal associated with the transmission filter of the target uplink signal includes the above-mentioned downlink measurement reference signal or uplink measurement reference signal.

[0099] In an embodiment, at least one subband satisfies at least one of the following:

[0100] At least two subbands in one BWP include a synchronization signal block (SSB);

[0101] In one subband group, different SSB indexes occupy different numbers of subbands.

[0102] In this embodiment, the number of subbands occupied by different SSB indexes can be different. For example, some SSB indexes only occupy the resources of one subband, and some SSB indexes occupy multiple subbands. Figure 4 An embodiment provides a schematic diagram of subbands occupied by SSB. As shown in Figure 4 Each SSB index occupies resources in subband 2, but SSB 2 also occupies frequency domain resources in subband 4, and SSB 3 also occupies frequency domain resources in subbands 3 and 4. Other subbands occupied by SSB 2 and 3 are located on one side of the SSB 2 subband.

[0103] There can be more than one subband (or subband group) in one BWP including a synchronization signal such as SSB, and the SSBs in different subbands do not satisfy the QCL relationship. Figure 5 Another embodiment provides another schematic diagram of subbands occupied by SSB. As shown in Figure 5As shown in FIG, the SSB of the same physical cell identifier (PCI) is located in subband 1 and subband 3. The SSB index set sent by the base station in subband 1 and subband 3 is the same, and both send SSB0 to SSB3. Of course, this embodiment does not rule out the possibility that the SSB index set sent in subband 1 and subband 3 is different. Figure 5 In the , the number of subbands occupied by each SSB index is the same.

[0104] In some embodiments, it is not excluded that each SSB occupies a different number of subbands. Figure 6 FIG. 1 is a schematic diagram of another sub-band occupied by SSB provided in an embodiment. Figure 6 As shown, there is a cluster of SSBs in each subband group. Different subbands (or SSBs in 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. Figure 6 In this embodiment, the SSB patterns in different subband groups are the same. This embodiment does not exclude the possibility that the SSB patterns 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 meet the Quasi-Co-Location (QCL) relationship.

[0105] In one embodiment, determining subband parameters includes:

[0106] receiving dynamic control signaling;

[0107] The subband parameters are determined according to dynamic control signaling.

[0108] In one embodiment, determining parameters of a signal in at least one subband according to subband parameters includes:

[0109] When the number of subbands included in the at least one subband is greater than 1, a parameter of a signal is determined separately on each subband of the at least one subband.

[0110] In one embodiment, a frequency domain bandwidth includes at most one sub-band; and / or a sounding reference signal resource corresponds to a set of quasi co-location parameters in a frequency domain bandwidth.

[0111] In this embodiment, the restriction of one frequency domain bandwidth only includes one sub-band, and the same measurement reference signal resource (such as a CSI-RS resource or an SSB resource) corresponds to only one set of QCL parameters on one frequency domain bandwidth. On this basis, the existing 5G NR scheme can also be used when indicating the QCL relationship, that is, it is assumed that the channel between one transceiver node and one terminal only corresponds to one optimal radio frequency transmitting beam pair, or it is assumed that each candidate radio frequency beam is applicable to the entire bandwidth, the performance difference is not large on the entire bandwidth, and the corresponding optimal receiving beam is the same on the entire bandwidth. However, the number of frequency domain bandwidths generally needs to be increased, and the configuration signaling also needs to be increased, and the complexity of the first communication node is increased. For example, because different beam direction groups correspond to different sub-band sizes, different frequency domain bandwidths need to be configured for different beam direction groups. With the increase of the beam group, the number of configured frequency domain bandwidths also needs to be increased, and other parameters in different frequency domain bandwidths are also independently configured for each frequency domain bandwidth. In fact, these other parameters are the same in these different frequency domain bandwidths and do not need to be additionally configured. If the parameter configuration architecture in the existing 5G NR is used, other parameters such as channel parameters and demodulation reference signal parameters need to be configured for each frequency domain bandwidth. If the signal transmission method based on the sub-band to determine the signal parameter in the embodiment of the application is used, the transmission end can use the transmission parameter that is more matched to the actual channel, improve the communication efficiency and reliability, can avoid frequent frequency domain bandwidth switching, and can also avoid unnecessary repeated configuration of parameters.

[0112] It should be noted that the dispersion is the beam variation caused by the propagation delay between the antennas in the frequency domain. Specifically, for a linear array with N antennas, the channel h n,i can be expressed as follows:

[0113]

[0114] where τ n,i is the propagation delay between the nth transmitting antenna and the receiving end (or scatterer), n = 0, 1,..., N-1, λ0is the wavelength corresponding to f0in the frequency domain, the antenna spacing d = αλ0, α is a non-negative number, generally α is 0.5, λ1is the wavelength at f1in the frequency domain, c is the speed of light, c = λ1f1= λ0f0, Δf is the size of the sub-band, k is the index of the sub-band, f1is any frequency domain other than f0, and θ is the angle between the propagation path i and the transmitting antenna. It can be seen from equation (1) that the pre-coding angle corresponding to the channel Changes with the change of frequency domain location k. That is, for the same propagation path, different subbands correspond to different precoding angles. In the traditional scheme, the precoding angle changes with the frequency domain, because different propagation paths i correspond to different τ 0,i , when multiple paths are superimposed, the precoding angle changes with the frequency domain, τ n,i In the processing of, λ0 and λ1 are considered to be approximately equal, so the channel is simplified as follows:

[0115]

[0116] That is, for a single propagation path, the precoding angle does not change with the frequency domain. This assumption is suitable 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 result in a large performance loss.

[0117] In an embodiment, the subband parameters include at least one of the following: a subband size, a starting reference position of a first subband, a number of subbands, an index type of a physical resource block (PRB) included in the subband, and a position of a reference subband; wherein the index type includes an index obtained according to a common reference position of a carrier or an index of a PRB in a PRB set included in a bandwidth part (BWP).

[0118] In an embodiment, the signal parameters include at least one of the following parameters of the signal: a quasi co-location parameter, a MCS, an RV, a frequency domain scheduling granularity, a channel quality parameter, a size of a PRG, a transmission filter parameter, a power parameter, a range of occupied frequency domain resources (PRBs), a maximum number of occupied PRBs, a frequency domain resource, a number of subbands occupied on a frequency domain bandwidth at a time, an allocation granularity of the occupied frequency domain resources, and a number of bits occupied by a signaling bit field in a DCI that allocates frequency domain resources.

[0119] In an 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 the signal at a time.

[0120] In the embodiments of the present application, the above-mentioned subband can also be referred to as a frequency domain unit, a dispersion subband, a quasi co-location parameter subband, a radio frequency beam subband, a signal parameter subband, etc.

[0121] If a signal occupies frequency domain resources in different subbands at a given moment, the signal has different parameters in each subband. These parameters include at least one of the following: quasi-co-location parameters, MCS, RV, frequency domain scheduling granularity, channel quality, PRG size, transmit filter, power, and frequency domain resources. Signals in different subbands must meet the above predefined conditions, or there is a limit on the maximum number of subbands a signal can occupy at a given moment.

[0122] In an embodiment of the present application, a moment may 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, 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, and different transmission opportunities may include different numbers of time domain symbols), a subframe, a frame, or other time units.

[0123] In the embodiments of this application, for ease of description, channels and reference signals are collectively referred to as signals. Signals include modulated signals transmitted in channels, as well as various reference signals, synchronization signals, and random access signals. Channels include at least one of the following: a downlink data channel, a downlink control channel, an uplink data channel, and an uplink control channel. Reference signals include at least one of the following: a demodulation reference signal and a measurement reference signal.

[0124] In the embodiment of the present application, two pieces of information are associated, including at least one of the following: one piece of information can be used to obtain the other piece of information; the value range of the other piece of information can be obtained based on one piece of information; and the value combination of the two pieces of information meets a predetermined condition.

[0125] In an embodiment of the present application, a frequency domain bandwidth may be 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 a signal, the frequency domain resources occupied by a signal at a moment, the frequency domain resources included in a serving cell group, and the frequency domain resources included in a BWP group.

[0126] In the embodiment of the present application, dynamic control signaling may also be referred to as DCI, or physical layer control information or signaling, etc.

[0127] The embodiment of the present application also provides a signal transmission method. Figure 7 This is a flowchart of another signal transmission method provided in one embodiment. This method can be applied to a second communication node. For technical details not fully described in this embodiment, please refer to any of the above embodiments.

[0128] like Figure 7 As shown, the method includes the following steps:

[0129] In step 210, a sub-band parameter is determined.

[0130] In step 220, a parameter of a signal in at least one sub-band is determined according to the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth.

[0131] In step 230, the signal is transmitted according to the parameter of the signal, and the transmission includes receiving or sending.

[0132] In an embodiment, the sub-band parameter is determined, including:

[0133] Control signaling is sent, and the control signaling carries the sub-band parameter.

[0134] In an embodiment, the control signaling includes dynamic control signaling.

[0135] In an embodiment, the control signaling is included in configuration signaling of a set parameter, and the set parameter includes one of the following: a frequency domain bandwidth, a measurement reference signal resource, a TCI state, the signal, a measurement reference signal resource group, and a TCI state group.

[0136] In an embodiment, the method further includes:

[0137] Step 240: receiving capability information sent by the first communication node, and the capability information indicates a maximum number of sub-bands corresponding to the signal of the first communication node at one time and one frequency domain bandwidth.

[0138] In an embodiment, the sub-band parameter is determined, including:

[0139] Control signaling is sent, and the control signaling carries a parameter of at least one set of signals, the parameter of the at least one set of signals corresponds to at least one sub-band, each parameter of the at least one set of signals corresponds to one sub-band in the at least one sub-band, and different parameters of the at least one set of signals correspond to different sub-bands in the at least one sub-band.

[0140] Embodiments of the present application also provide a signal transmission device. Figure 8 A structural schematic diagram of a signal transmission device provided by an embodiment is shown in FIG. 1. Figure 8 As shown in FIG. 1, the signal transmission device includes:

[0141] A first parameter determination module 310 is configured to determine a sub-band parameter.

[0142] A second parameter determination module 320 is configured to determine a parameter of a signal in at least one sub-band according to the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth.

[0143] The transmission module 330 is configured to transmit the signal according to the parameter of the signal, and the transmission includes receiving or sending.

[0144] In an embodiment, the sub-band parameter is configured in configuration information of the set parameter, and the set parameter includes one of the following: a frequency domain bandwidth, a measurement reference signal resource, a TCI state, the signal, a measurement reference signal resource group, and a TCI state group.

[0145] In an embodiment, the first parameter determination module 310 is configured to:

[0146] determine the set parameter corresponding to the signal;

[0147] determine the sub-band parameter corresponding to the signal according to the set parameter corresponding to the signal.

[0148] In an embodiment, in the DCI scheduling the signal, the set parameter of the signal and the following at least one information of the frequency domain resource occupied by the signal are associated: a frequency domain range, an allocation granularity, and a bit number of a signaling bit field.

[0149] In an embodiment, the second parameter determination module 320 is configured to:

[0150] determine one sub-band occupied by the signal at one time and one frequency domain bandwidth according to the sub-band parameter;

[0151] The transmission module 330 is configured to transmit the signal on the one sub-band.

[0152] The parameter of the signal includes a sub-band number occupied by the signal at one time and one frequency domain bandwidth.

[0153] In an embodiment, the second parameter determination module 320 is configured to:

[0154] determine one or more sub-bands occupied by the signal at one time and one frequency domain bandwidth according to the sub-band parameter;

[0155] The transmission module 330 is configured to transmit the signal on the one or more sub-bands.

[0156] In the case where the sub-band number is greater than 1, the measurement reference signals associated with the signals in different sub-bands satisfy a predetermined condition.

[0157] The parameter of the signal includes a sub-band number occupied by the signal at one time and one frequency domain bandwidth.

[0158] In an embodiment, the predetermined condition includes at least one of the following:

[0159] The first type of quasi co-location parameter satisfies a quasi co-location relationship;

[0160] The first type of quasi co-location parameter satisfies a quasi co-location relationship;

[0161] The first type of quasi co-location parameter satisfies a quasi co-location relationship.

[0162] In an embodiment, the second parameter determination module 320 is configured to determine the parameters of the signals on each of the at least one subband according to the distance between the each of the at least one subband and the reference subband; and / or determine the size of the subband according to the distance between the each of the at least one subband and the reference subband.

[0163] In an embodiment, the frequency domain resource occupied by one of the signals at a time is located in one subband.

[0164] In an embodiment, the frequency domain resource occupied by one of the signals at a time is located in at least two subbands.

[0165] Different subbands correspond to different sets of parameters of the signals.

[0166] In an embodiment, the apparatus further comprises:

[0167] The capability information determination module is configured to determine capability information of the maximum number of subbands corresponding to the signals at a time and a frequency domain bandwidth.

[0168] The reporting module is configured to report the capability information to the second communication node.

[0169] In an embodiment, when the maximum number of subbands occupied by the signals is greater than 1, the subbands are symmetrically distributed on both sides of the reference subband.

[0170] In an embodiment, one of the signals corresponds to a different set of parameters of the signals in each of the at least one subband; and / or

[0171] One of the signals does not satisfy a quasi co-location relationship with respect to the second type of quasi co-location parameter in different subbands of the at least one subband.

[0172] In an embodiment, the TCI state of the signals is configured with one of the following information:

[0173] The resource index of the quasi co-location measurement reference signal, the serving cell where the quasi co-location measurement reference signal is located, and the target subband index;

[0174] The resource index of the quasi co-location measurement reference signal, the serving cell where the quasi co-location measurement reference signal is located, and the BWP index;

[0175] a resource index of a quasi co-location measurement reference signal, a serving cell where the quasi co-location measurement reference signal is located, a BWP index, and a target subband index.

[0176] In an embodiment, any two of the signals satisfy one of the following:

[0177] two signals in different subbands do not satisfy the quasi co-location relationship;

[0178] two signals whose frequency domain resources are different by more than a first predetermined value do not satisfy the quasi co-location relationship;

[0179] two signals whose subband indexes are different by more than a second predetermined value do not satisfy the quasi co-location relationship; two signals belonging to different BWP groups in one serving cell do not satisfy the quasi co-location relationship.

[0180] In an embodiment, a precoding resource group of one of the signals is located in one subband, and one subband includes at least one precoding resource group.

[0181] In an embodiment, one measurement reference signal corresponds to one set of channel state information (CSI) subband partition parameters and one set of subband partition parameters.

[0182] In an embodiment, the apparatus further includes:

[0183] a first target determining module configured to determine a subband of a target downlink measurement reference signal corresponding to a transmission filter for transmitting an uplink target signal, the transmission filter being obtained according to a reception filter of the target downlink measurement reference signal in the subband.

[0184] In an embodiment, the apparatus further includes:

[0185] a second target determining module configured to determine a subband of a target uplink measurement reference signal corresponding to a transmission filter for transmitting an uplink target signal, the transmission filter being obtained according to a transmission filter of the target uplink measurement reference signal in the subband.

[0186] In an embodiment, the at least one subband satisfies at least one of the following:

[0187] at least two subbands in one BWP include synchronization signal blocks (SSBs);

[0188] in one subband group, different SSB indexes occupy different numbers of subbands.

[0189] In an embodiment, the first parameter determining module 310 is configured to:

[0190] receive dynamic control signaling; and determine the subband parameters according to the dynamic control signaling.

[0191] In an embodiment, the second parameter determination module 320 is configured to: in a case where the number of subbands included in the at least one subband is greater than 1, determine the parameter of the signal on each of the at least one subband, respectively.

[0192] In an embodiment, the one frequency domain bandwidth includes at most one subband; and / or,

[0193] One measurement reference signal resource corresponds to a set of quasi co-location parameters on one frequency domain bandwidth.

[0194] In an embodiment, the subband parameter includes at least one of the following: a subband size, a starting reference position of a first subband, a number of subbands, an index type of a physical resource block (PRB) included in the subband, and a position of a reference subband; wherein the index type includes an index obtained according to a common reference position of a carrier or an index of a PRB in a PRB set included in a bandwidth part (BWP).

[0195] In an embodiment, the parameter of the signal includes at least one of the following parameters of the signal:

[0196] a quasi co-location parameter, a modulation and coding strategy (MCS), a redundancy version (RV), a frequency domain scheduling granularity, a channel quality parameter, a size of a precoding resource group (PRG), a transmission filter parameter, a power parameter, a range of occupied frequency domain resources (PRBs), a maximum value of a number of occupied PRBs, a frequency domain resource, a number of subbands occupied on one frequency domain bandwidth at one time,

[0197] an allocation granularity of the occupied frequency domain resources, and a number of bits of a signaling bit field in a DCI for allocating frequency domain resources.

[0198] In an embodiment, the one frequency domain bandwidth includes at least one of the following:

[0199] frequency domain resources included in one serving cell, frequency domain resources included in one BWP, frequency domain resources occupied by the signal, and frequency domain resources occupied by the signal at one time.

[0200] The signal transmission apparatus proposed in the embodiment belongs to the same inventive concept as the signal transmission method proposed in the above-described embodiments, and technical details not described in the embodiment can be referred to the above-described embodiments, and the embodiment has the same beneficial effects as the signal transmission method.

[0201] The embodiment of the present application further provides a signal transmission apparatus. Figure 9 Another signal transmission apparatus provided by an embodiment is shown in a structural schematic diagram. As shown in the figure, Figure 9 the signal transmission apparatus includes:

[0202] The first parameter determining module 410 is configured to determine a subband parameter.

[0203] The second parameter determining module 420 is configured to determine a parameter of a signal in at least one subband according to the subband parameter, wherein the at least one subband belongs to one frequency domain bandwidth.

[0204] The transmission module 430 is configured to transmit the signal according to the parameter of the signal, and the transmission includes receiving or sending.

[0205] In an embodiment, the first parameter determining module 410 is configured to:

[0206] Send control signaling, and the control signaling carries the subband parameter.

[0207] In an embodiment, the control signaling includes dynamic control signaling.

[0208] In an embodiment, the control signaling is included in configuration signaling of a set parameter, and the set parameter includes one of the following: a frequency domain bandwidth, a measurement reference signal resource, a TCI state, the signal, a measurement reference signal resource group, and a TCI state group.

[0209] In an embodiment, the apparatus further includes:

[0210] The capability information receiving module is configured to receive capability information sent by the first communication node, and the capability information indicates a maximum number of subbands corresponding to the signal of the first communication node at one time and one frequency domain bandwidth.

[0211] In an embodiment, the first parameter determining module 410 is configured to:

[0212] Send control signaling, and the control signaling carries at least one set of parameters of the signal, the at least one set of parameters of the signal corresponds to the at least one subband, each set of parameters of the signal in the at least one set of parameters of the signal corresponds to one subband in the at least one subband, and different sets of parameters of the signal in the at least one set of parameters of the signal correspond to different subbands in the at least one subband.

[0213] The signal transmission apparatus proposed in the embodiment belongs to the same inventive concept as the signal transmission method proposed in the above-described embodiments, and the technical details not described in detail in the embodiment can be referred to the above-described embodiments, and the embodiment has the same beneficial effects as performing the signal transmission method.

[0214] The embodiment of the present application further provides a communication node, Figure 10 A hardware structure schematic diagram of a communication node provided for an embodiment is as follows: Figure 10As shown, the communication node provided by the present application comprises a processor 510 and a memory 520; the processor 510 in the communication node can be one or more, Figure 10 The processor 510 is taken as an example in the foregoing embodiment; 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 embodiments of the present application.

[0215] The communication node further comprises a communication device 530, an input device 540 and an output device 550.

[0216] The processor 510, the memory 520, the communication device 530, the input device 540 and the output device 550 in the communication node can be connected through a bus or other means, Figure 10 The bus connection is taken as an example in the foregoing embodiment.

[0217] The input device 540 can be used to receive input digital or character information, and generate key signal input related to user settings and function control of the communication node. The output device 550 can include a display device such as a display screen.

[0218] The communication device 530 can include a receiver and a transmitter. The communication device 530 is configured to perform information receiving and transmitting communication according to the control of the processor 510.

[0219] 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 as described in the embodiments of the present application (for example, 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 can include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required by a function; the data storage area can store data created according to the use of the communication node, etc. In addition, the memory 520 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device. In some examples, the memory 520 can further include a memory remotely arranged with respect to the processor 510, which can be connected to the communication node through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0220] The embodiment of the present application further provides a storage medium, which stores a computer program. The computer program is executed by a processor to implement the signal transmission method in any of the embodiments of the present application. The method comprises: determining a sub-band parameter; determining a parameter of a signal in at least one sub-band according to the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth; and transmitting the signal according to the parameter of the signal, wherein the transmitting comprises sending or receiving.

[0221] The embodiment of the present application further provides a computer program product, which comprises computer programs / instructions. The computer programs / instructions are executed by a processor to implement the signal transmission method in any of the embodiments of the present application.

[0222] The computer storage medium of the embodiment of the present application can adopt 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. The computer readable storage medium can be, but is not limited to, for example, an electrical, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, device or apparatus, or any combination of the above. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable programmable read only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. The computer readable storage medium can be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus or device.

[0223] The computer readable signal medium can include a data signal propagated in a baseband or propagated as a carrier wave in a propagated data signal, in which the computer readable program code is embodied. The propagated data signal can take various forms, including but not limited to, an electromagnetic signal, an optical signal or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus or device.

[0224] The program code contained in the computer readable medium can be transmitted by any suitable medium, including but not limited to, wireless, wire line, optical cable, radio frequency (RF), or any suitable combination of the above.

[0225] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0226] The embodiments of the present application further provide a computer program product, comprising computer programs / instructions, which, when executed by a processor, implement the signal transmission method according to any of the above embodiments.

[0227] The above describes only exemplary embodiments of the present application and is not intended to limit the scope of protection of the present application.

[0228] Those skilled in the art will appreciate that the term user terminal encompasses any appropriate type of wireless user equipment, such as a mobile phone, a portable data processing portable network browser or a vehicle mounted mobile station.

[0229] In general, the various embodiments of the application can be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in

[0230] Embodiments of the application can be implemented by way of computer readable instructions, which are stored in storage medium, which is coupled to a processing unit or processor. Such processor can include central processing units (CPUs), microprocessors, and microcontrollers. The computer readable instructions can be organized into one or more computer readable code sections or modules. Generally, such instructions can be implemented as "software" or "firmware" application programming interfaces (APIs), which are executable by the processor. The instructions can be stored in object code format on one or more storage media. Examples of storage media include computer- readable storage media such as floppy disks, CD-ROMs, DVD-ROMs, Blu-ray discs, hard disks, and magnetic tape. However, a practitioner of ordinary skill will recognize that the storage media specifically described herein can be substituted for storage media of other types.

[0231] The block diagrams of any logical flow of the present application in the accompanying drawings can represent program steps or can represent interconnected logic circuits, modules, and functions, or can represent a combination of program steps and logic circuits, modules, and functions. The computer program can be stored on a memory. The memory can have any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as, but not limited to, a Read-Only Memory (ROM), a Random Access Memory (RAM), an optical storage device, and a system (a Digital Video Disc (DVD) or a Compact Disk (CD), etc.). The computer readable medium can include a non-transitory storage medium. The data processor can be of any type suitable for the local technical environment, and can include, but is not limited to, a general purpose computer, a special purpose computer, a microprocessor, a Digital Signal Processing (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FGPA), and a processor based on multi-core processor architecture.

[0232] A detailed description of exemplary embodiments of the present application has been provided above with reference to the accompanying drawings. However, various modifications and changes can be made to the above embodiments by those skilled in the art without departing from the scope of the present application, which is defined by the appended claims. Accordingly, the proper scope of the present application is determined by the claims.

Claims

1. A signal transmission method, characterized by, The method is applied to a communication node, and comprises: determining a sub-band parameter; determining a parameter of a signal in at least one sub-band according to the sub-band parameter, wherein the at least one sub-band belongs to one frequency domain bandwidth; transmitting the signal according to the parameter of the signal, wherein the transmitting comprises receiving or sending.

2. The method of claim 1, wherein, The sub-band parameter is configured in configuration information of a set parameter, and the set parameter comprises one of the following: a frequency domain bandwidth, a measurement reference signal resource, a transmission configuration indication (TCI) state, the signal, a measurement reference signal resource group, and a TCI state group.

3. The method of claim 2, wherein, The determining of the sub-band parameter comprises: determining the set parameter corresponding to the signal; determining the sub-band parameter corresponding to the signal according to the set parameter corresponding to the signal.

4. The method of claim 2, wherein, In downlink control information (DCI) for scheduling the signal, the set parameter corresponding to the signal is associated with at least one of the following information of a frequency domain resource occupied by the signal: a frequency domain range, an allocation granularity, and a bit number of a signaling bit field.

5. The method of claim 1, wherein, The determining of the parameter of the signal in the at least one sub-band according to the sub-band parameter comprises: determining one sub-band occupied by the signal at one time and on one frequency domain bandwidth according to the sub-band parameter; The transmitting of the signal according to the parameter of the signal comprises: transmitting the signal on the one sub-band; wherein the parameter of the signal comprises a sub-band number occupied by the signal at one time and on one frequency domain bandwidth.

6. The method of claim 1, wherein, The determining of the parameter of the signal in the at least one sub-band according to the sub-band parameter comprises: determining one or more sub-bands occupied by the signal at one time and on one frequency domain bandwidth according to the sub-band parameter; The transmitting of the signal according to the parameter of the signal comprises: transmitting the signal on the one or more sub-bands; wherein, in the case that the sub-band number is greater than 1, measurement reference signals associated with signals in different sub-bands satisfy a predetermined condition; the parameter of the signal comprises a sub-band number occupied by the signal at one time and on one frequency domain bandwidth.

7. The method of claim 6, wherein, The predetermined condition comprises at least one of the following: a first type of quasi co-location parameter satisfies a quasi co-location relationship; belongs to one reference signal group; a maximum number of measurement reference signals that do not satisfy the quasi co-location relationship with respect to the first type of quasi co-location parameter is less than a predetermined value.

8. The method of claim 1, wherein, The determining of the parameter of the signal in the at least one sub-band according to the sub-band parameter comprises at least one of the following: determining the parameter of the signal on each sub-band in the at least one sub-band according to a distance between the each sub-band and a reference sub-band; determining a size of a sub-band according to a distance between each sub-band in the at least one sub-band and a reference sub-band.

9. The method of claim 1, wherein, A frequency domain resource occupied by one signal at one time is located in one sub-band.

10. The method of claim 1, wherein, A frequency domain resource occupied by one signal at one time is located in at least two sub-bands; wherein different sub-bands respectively correspond to one set of parameters of the signal.

11. The method of claim 1, wherein, Further comprising: determining capability information of a maximum number of sub-bands corresponding to the signal at one time and on one frequency domain bandwidth; reporting the capability information to a second communication node.

12. The method of claim 1, wherein, In the case that the maximum number of sub-bands occupied by the signal is greater than 1, each sub-band is symmetrically distributed on two sides of a reference sub-band.

13. The method of claim 1, wherein One of the signals corresponds to a set of parameters of the signals in each of the at least one sub-band, respectively; and / or One of the signals does not satisfy the quasi co-location relationship in different sub-bands of the at least one sub-band at least in terms of the second type of quasi co-location parameters.

14. The method of claim 1, wherein, One of the following information is configured in the TCI state of the signal: Resource index of the quasi co-location measurement reference signal, serving cell where the quasi co-location measurement reference signal is located, and target sub-band index; Resource index of the quasi co-location measurement reference signal, serving cell where the quasi co-location measurement reference signal is located, and BWP index; Resource index of the quasi co-location measurement reference signal, serving cell where the quasi co-location measurement reference signal is located, BWP index, and target sub-band index.

15. The method of claim 1, wherein, Any two of the signals satisfy one of the following: Two signals in different sub-bands do not satisfy the quasi co-location relationship; Two signals whose frequency domain resources are different by more than a first predetermined value do not satisfy the quasi co-location relationship; Two signals whose sub-band indexes are different by more than a second predetermined value do not satisfy the quasi co-location relationship.

16. The method of claim 1, wherein, A precoding resource group of one of the signals is located in one sub-band, and at least one precoding resource group is included in one sub-band.

17. The method of claim 1, wherein, One measurement reference signal corresponds to a set of channel state information (CSI) sub-band division parameters and a set of sub-band division parameters.

18. The method of claim 1, wherein, Further comprising: Determining a sub-band of a target downlink measurement reference signal corresponding to a transmission filter for transmitting an uplink target signal, the transmission filter being obtained according to a reception filter of the target downlink measurement reference signal in the sub-band.

19. The method of claim 1, wherein, Further comprising: Determining a sub-band of a target uplink measurement reference signal corresponding to a transmission filter for transmitting an uplink target signal, the transmission filter being obtained according to a transmission filter of the target uplink measurement reference signal in the sub-band.

20. The method of claim 1, wherein, The at least one sub-band satisfies at least one of the following: At least two sub-bands in one BWP include synchronization signal blocks (SSBs); In one sub-band group, different SSB indexes occupy different numbers of sub-bands.

21. The method of claim 1, wherein, The determination of the sub-band parameters comprises: Receiving dynamic control signaling; Determining the sub-band parameters according to the dynamic control signaling.

22. The method of any one of claims 1-21, wherein, The determination of the parameters of the signals in the at least one sub-band according to the sub-band parameters comprises: In the case where the at least one sub-band includes more than one sub-band, the parameters of the signals are determined in each of the at least one sub-band, respectively.

23. The method of any one of claims 1-21, wherein, One of the frequency domain bandwidths includes at most one sub-band; and / or One measurement reference signal resource corresponds to a set of quasi co-location parameters in one frequency domain bandwidth.

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

25. The method of any of claims 1-21, wherein The parameters of the signals include at least one of the following parameters of the signals: A quasi co-location parameter, a modulation and coding strategy (MCS), a redundancy version (RV), a frequency domain scheduling granularity, a channel quality parameter, a size of a precoding resource group (PRG), a transmission filter parameter, a power parameter, a range of occupied frequency domain resources (PRBs), a maximum number of occupied PRBs, a frequency domain resource, a number of subbands occupied by the signal in one time and in one frequency domain bandwidth, An allocation granularity of occupied frequency domain resources, and a number of bits occupied by signaling of allocated frequency domain resources in the DCI.

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

27. The method of claim 1, wherein, The determination of the subband parameter includes: Sending control signaling, wherein the control signaling carries the subband parameter.

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

29. The method of claim 27, wherein, The control signaling is included in configuration signaling of a set parameter, and the set parameter includes one of the following: A frequency domain bandwidth, a measurement reference signal resource, a transmission configuration indication (TCI) state, the signal, a measurement reference signal resource group, and a TCI state group.

30. The method of claim 1, wherein, Further including: Receiving capability information sent by a first communication node, wherein the capability information indicates a maximum number of subbands corresponding to the signal in one time and in one frequency domain bandwidth of the first communication node.

31. The method of claim 1, wherein, The determination of the subband parameter includes: Sending control signaling, wherein the control signaling carries at least one set of parameters of the signal, the at least one set of parameters of the signal corresponds to the at least one subband, each set of parameters of the signal in the at least one set of parameters of the signal corresponds to one subband in the at least one subband, and different sets of parameters of the signal in the at least one set of parameters of the signal correspond to different subbands in the at least one subband.

32. A communication node, comprising: Including: A memory and one or more processors; The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the signal transmission method in any one of claims 1-31.

33. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the signal transmission method in any one of claims 1-31.

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