Signal transmission method and transmission device

Abstract

Provided are a signal transmission method and transmission device, the method comprising: a terminal device sending a first reference signal and a second reference signal to a network device, the first reference signal and the second reference signal belonging to the same reference signal resource set, at least one of frequency domain resources or sending power of the first reference signal and the second reference signal is different. A network device can obtain a first channel of a first reference signal, obtain a second channel of a second reference signal, and obtain a third channel based on combination of the first channel and the second channel. Therefore, in the same reference signal resource set, at least one of the frequency domain resources or the sending power of different reference signals is different, and at least one of the frequency domain resources or the sending power of the different reference signals is different, so that the channel estimation precision of the reference signals is improved in a scene in which the signal strength of the different reference signals is different.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular to a signal transmission method and transmission device. Background Technology

[0002] In a multiple-input multiple-output (MIMO) scenario, a network device can configure one or more SRS resource sets for a terminal device. Each SRS resource set can contain one or more SRS resources, and an SRS resource can contain one or more antenna ports. The terminal device can transmit SRS signals on the allocated SRS resources through one or more antenna ports. The network device can then perform uplink channel estimation on the terminal device's antenna ports based on the SRS signals.

[0003] However, in this scenario, the channel estimation accuracy of SRS may be low. Summary of the Invention

[0004] This application provides a signal transmission method and transmission device, which is beneficial to improving the channel estimation accuracy of SRS.

[0005] Firstly, a communication method is provided. This method can be executed by a terminal-side communication device, or by other entities, and this application does not limit the scope of execution. The terminal-side communication device can be a terminal device, or a functional module, communication module, chip, chip system, or circuit (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip) within the terminal device, or a functional module within the terminal device capable of calling and executing programs. For ease of description, the following explanation uses a terminal device as an example.

[0006] The method includes: transmitting a first reference signal; transmitting a second reference signal; wherein the first reference signal and the second reference signal belong to the same set of reference signal resources, and at least one of the frequency domain resources or transmission power of the first reference signal and the second reference signal is different.

[0007] Frequency domain resources can be understood as frequency domain bandwidth or the number of frequency domain resource blocks. Transmission power can be understood as frequency domain transmission power. If at least one of the frequency domain resources or transmission power differs between the first reference signal and the second reference signal, it can include three cases. These three cases are: 1) The first reference signal and the second reference signal have different frequency domain resources but the same transmission power. 2) The first reference signal and the second reference signal have the same frequency domain resources but different transmission powers. 3) The first reference signal and the second reference signal have different frequency domain resources and different transmission powers.

[0008] The signal transmission method provided in this application embodiment has at least one difference in frequency domain resources or transmission power among different reference signals in the same set of reference signal resources. In scenarios where the signal strength of different reference signals is different, it is beneficial to improve the channel estimation accuracy of the reference signals.

[0009] Optionally, the terminal device can transmit a first reference signal through a first port and a second reference signal through a second port. The first port and the second port can also be referred to as a first antenna port and a second antenna port, a first pilot port and a second pilot port, or a first reference signal port and a second reference signal port; this application does not limit the specific designation. The first port and the second port are different.

[0010] In this way, reference signals transmitted through different ports can correspond to different frequency domain resources and / or different transmission powers. When the channel quality varies at different ports, this is beneficial to improving the channel estimation accuracy of the reference signal.

[0011] Optionally, the first port and the second port can belong to different port groups. Ports in the same port group can transmit reference signals using the same frequency domain resources and transmission power. Ports in different port groups can transmit reference signals using different frequency domain resources and / or different transmission powers.

[0012] In this way, different ports are grouped together, with ports in the same group corresponding to the same frequency domain resources and transmission power, and ports in different port groups corresponding to different frequency domain resources and / or different transmission powers. This approach helps to reduce complexity compared to different ports corresponding to different frequency domain resources and / or different transmission powers.

[0013] Optionally, the channel quality differences between ports in different port groups may be significant, while the channel quality differences between ports in the same port group may be relatively small. For example, the channel quality difference between ports in different port groups may exceed a channel quality threshold, while the channel quality difference between ports in the same port group may be less than a channel quality threshold. Thus, the channel quality of the first port and the second port can differ. When the channel quality differs, the reference signals transmitted by the first port and the second port can utilize different frequency domain resources and / or different transmission powers. This is beneficial for improving the channel estimation accuracy of the port with poor channel quality and reducing the interference of the reference signal transmitted by the port with better channel quality on the reference signals of other users. In conjunction with the first aspect, in some possible implementations, the frequency domain resource is the frequency domain bandwidth occupied by at least one reference signal transmission; or, the frequency domain resource is the number of frequency domain resource blocks occupied by at least one reference signal transmission; or, the frequency domain resource is the number of frequency domain resource elements occupied by at least one reference signal transmission.

[0014] Optionally, the frequency domain resource can be the frequency domain bandwidth occupied by a single reference signal transmission; or, the frequency domain resource can be the number of frequency domain resource blocks occupied by a single reference signal transmission; or, the frequency domain resource can be the number of frequency domain resource elements occupied by a single reference signal transmission.

[0015] In conjunction with the first aspect, in some possible implementations, the first reference signal and the second reference signal have different frequency domain resources, and the first reference signal and the second reference signal also satisfy one or more of the following: the first reference signal and the second reference signal have the same transmission power; or, the first reference signal and the second reference signal have different power spectral densities; or, the frequency domain resources of the first reference signal and the second reference signal are in a multiple relationship; or, the first reference signal and the second reference signal have different transmission powers; or, the first reference signal and the second reference signal have the same power spectral density.

[0016] For example, the first reference signal and the second reference signal have different frequency domain resources, the first reference signal and the second reference signal have the same transmission power, and the first reference signal and the second reference signal have different power spectral densities.

[0017] With the same transmission power but different frequency domain resources, the power of each resource block or each resource element in the frequency domain is different, resulting in different frequency domain power spectral densities. This can be applied to ports with different channel qualities, improving the channel estimation accuracy of ports with poor channel quality and reducing the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0018] For example, the first reference signal and the second reference signal have different frequency domain resources, and the first reference signal and the second reference signal have different transmission powers.

[0019] Different frequency domain resources and different transmission powers can be applied to ports with different channel qualities. This helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0020] Optionally, the power spectral density of the first reference signal and the second reference signal can be the same.

[0021] The first and second reference signals have different frequency domain resources, and their transmission powers can differ even with the same power spectral density. This improves the accuracy of functional implementation, such as enhancing channel estimation accuracy.

[0022] For example, the frequency domain resources of the first reference signal and the second reference signal are different, and the frequency domain resources of the first reference signal and the second reference signal are in a multiple relationship.

[0023] The first and second reference signals have different frequency domain resources, making them applicable to ports with different channel qualities. This helps improve the channel estimation accuracy of ports with poor channel quality and reduces interference from reference signals transmitted by ports with better channel quality to the reference signals of other users. The frequency domain resources of the first and second reference signals are proportional, which simplifies the signaling indication method and the specific implementation of the terminal-side communication device.

[0024] In conjunction with the first aspect, in some possible implementations, the frequency domain resources of the first reference signal and the second reference signal are different, including one or more of the following: the transmission combs of the first reference signal and the second reference signal are different, and the transmission combs are used to determine the frequency domain resources; or, the frequency hopping parameters of the first reference signal and the second reference signal are different, and the frequency hopping parameters are used to determine the frequency domain resources; or, the repetition factors of the first reference signal and the second reference signal are different, and the repetition factors are used to determine the frequency domain resources; or, the frequency domain spread factors of the first reference signal and the second reference signal are different, and the repetition factors are used to determine the frequency domain resources.

[0025] The first and second reference signals have different frequency domain resources, which can be achieved through different transmission combs.

[0026] For example, if the transmission comb of the first reference signal can be two, then the first reference signal can be transmitted with a one-subcarrier interval between every two subcarriers. As described above. Figure 4 As shown, the frequency domain resources of the first reference signal may include the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers, or the 2nd, 4th, 6th, 8th, 10th, and 12th subcarriers.

[0027] If the transmission comb of the second reference signal can be 4, then the second reference signal can be transmitted with a subcarrier interval of every four subcarriers. If an RB includes 12 subcarriers, then the frequency domain resources of the second reference signal can include the 1st, 5th, and 9th subcarriers, or the 2nd, 6th, and 10th subcarriers, or the 3rd, 7th, and 11th subcarriers, or the 4th, 8th, and 12th subcarriers.

[0028] In this way, different transmission combs can realize different frequency domain resources, which can improve the occupancy rate of different subcarriers and help optimize spectrum utilization.

[0029] The first and second reference signals have different frequency domain resources, which can be achieved through frequency hopping parameters. Frequency hopping parameters can include B. SRS C SRS b hop One or more of the following. Among them, C SRS The index number, B, configured for the cell-specific reference signal bandwidth. SRS Configure an index number for the user-specific reference signal bandwidth, b hop Indicates whether to perform reference signal frequency hopping (or indicates the frequency hopping bandwidth occupied by the reference signal on one symbol).

[0030] In one possible implementation, the B values ​​of the first reference signal and the second reference signal... SRS and C SRS Same, b hop Different. hop The smaller the value, the more frequency domain resources are available; correspondingly, b hop The larger the value, the fewer the frequency domain resources. This is beneficial for making the frequency domain resources of the first reference signal and the second reference signal different.

[0031] For example, as can be seen from Table 1 above, when C SRS =63, B SRS When = 0, if the b of the first reference signal hop =1, which means that the frequency domain resources of the first reference signal include 16 RBs. If the b of the second reference signal is 1, then the frequency domain resources of the first reference signal include 16 RBs. hop =2, which means that the frequency domain resources of the second reference signal include 8RB.

[0032] Thus, if there is one difference in the frequency hopping parameters, the implementation is simple.

[0033] In another possible implementation, the B values ​​of the first reference signal and the second reference signal... SRS C SRS b hop There is at least one difference.

[0034] For example, the frequency domain resource is the frequency domain bandwidth occupied by a single transmission of the reference signal. The total bandwidth of the first reference signal transmission and the total bandwidth of the second reference signal transmission can be the same or different. As shown in Table 1 above, if the B of the first reference signal... SRS =0, C SRS =63, b hop =1, which means the total bandwidth of the first reference signal transmission can be 272RB, and the bandwidth of a single transmission of the first reference signal can be 16RB. If the B of the first reference signal... SRS =0, C SRS =34, b hop =1 indicates that the total bandwidth of the second reference signal transmission can be 136RB, and the bandwidth of a single second reference signal transmission can be 4RB.

[0035] In this way, one or more different frequency hopping parameters can exist, and there is no restriction on the different parameters, which makes it more flexible.

[0036] The first and second reference signals have different frequency domain resources, which can be achieved through different repetition factors. A smaller repetition factor means fewer repetitions of the reference signal, resulting in lower gain for joint channel estimation at the receiver, but shorter time for the reference signal to complete full-bandwidth frequency hopping. Conversely, a larger repetition factor means more repetitions of the reference signal, resulting in higher gain for joint channel estimation at the receiver, but longer time for the reference signal to complete full-bandwidth frequency hopping.

[0037] In this way, different frequency domain resources can be achieved through different repetition factors. The repetition factors can be flexibly adjusted according to network requirements and channel conditions, making them more flexible.

[0038] The first and second reference signals have different frequency domain resources, which can be achieved through different frequency domain spread factors.

[0039] Different reference signals can be configured with different frequency domain spread factors. The unit of the frequency domain spread factor can be a linear value or a dB value. If the unit of the frequency domain spread factor is a linear value, then the frequency domain spread factor can be a multiple relationship between the frequency domain resources of each reference signal and the original frequency domain resources. A frequency domain spread factor greater than 1 indicates an increase or improvement in frequency domain resources, while a frequency domain spread factor less than 1 indicates a decrease or reduction in frequency domain resources. The original frequency domain resources can also be called reference frequency domain resources, and this application does not limit this terminology. The frequency domain spread factor can also be called frequency weighting, etc., and this application does not limit this terminology.

[0040] For example, a frequency domain spread factor of 0.5 means that half of the original frequency domain resources are used to send the reference signal corresponding to the frequency domain spread factor, and a frequency domain spread factor of 2 means that twice the original frequency domain resources are used to send the reference signal corresponding to the frequency domain spread factor.

[0041] If the unit of the frequency domain spread factor is dB, the terminal device can convert the dB value into a linear value based on a preset conversion relationship, and then calculate it based on the linear value calculation method shown above.

[0042] In this way, different frequency domain spread factors can be used to make the frequency domain resources of the first reference signal and the second reference signal different. The difference in frequency domain resources can be achieved through simple calculation, which is simple.

[0043] In conjunction with the first aspect, in some possible implementations, the first reference signal and the second reference signal correspond to the same reference signal count.

[0044] In conjunction with the first aspect, in some possible implementations, the first reference signal and the second reference signal have different transmission powers, and the first reference signal and the second reference signal also satisfy one or more of the following: the first reference signal and the second reference signal have the same frequency domain resources; or, the first reference signal and the second reference signal have different frequency domain resources; or, the first reference signal and the second reference signal have different power spectral densities; or, the first reference signal and the second reference signal have the same power spectral density; or, the transmission powers of the first reference signal and the second reference signal are in a multiple relationship.

[0045] For example, the first reference signal and the second reference signal have different transmission powers, the first reference signal and the second reference signal have the same frequency domain resources, and the first reference signal and the second reference signal have different power spectral densities.

[0046] With different transmission power but the same frequency domain resources, the power of each resource block or each resource element in the frequency domain is different, resulting in different frequency domain power spectral densities. This can be applied to ports with different channel qualities, which is beneficial for improving the channel estimation accuracy of ports with poor channel quality and reducing the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0047] For example, the first reference signal and the second reference signal have different transmission powers and different frequency domain resources.

[0048] Different frequency domain resources and different transmission powers can be applied to ports with different channel qualities. This helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0049] Optionally, the power spectral density of the first reference signal and the second reference signal can be the same.

[0050] The first and second reference signals have different frequency domain resources, and their transmission powers can differ even with the same power spectral density. This improves the accuracy of functional implementation, such as enhancing channel estimation accuracy.

[0051] For example, the transmission power of the first reference signal and the second reference signal are different, and the transmission power of the first reference signal and the second reference signal can be in a multiple relationship.

[0052] The first and second reference signals have different transmission powers, making them applicable to ports with varying channel quality. This improves channel estimation accuracy for ports with poor channel quality and reduces interference from reference signals transmitted by ports with better channel quality to other users' reference signals. The transmission powers of the first and second reference signals are proportional, simplifying implementation.

[0053] In conjunction with the first aspect, in some possible implementations, the transmission powers of the first reference signal and the second reference signal are different, further including one or more of the following: the power spreading factors of the first reference signal and the second reference signal are different, and the power spreading factors are used to determine the transmission power; or, the transmission power offsets of the first reference signal and the second reference signal are different, and the transmission power offsets are used to determine the transmission power; or, the downlink path loss estimates of the first reference signal and the second reference signal are different, and the downlink path loss estimates are used to determine the transmission power; or, the frequency domain resources of the first reference signal and the second reference signal are different, and the frequency domain resources are used to determine the transmission power.

[0054] The first reference signal and the second reference signal have different transmission powers, which can be achieved by using different power spread factors.

[0055] Different reference signals can be configured with different power spreading factors. The unit of the power spreading factor can be a linear value or a dB value. If the unit of the power spreading factor is a linear value, then the power spreading factor can be a multiple of the transmitted power of each reference signal on top of the original transmitted power. A power spreading factor greater than 1 indicates an increase in transmitted power, while a power spreading factor less than 1 indicates a decrease in transmitted power. The original transmitted power can also be called the reference transmit power, which is not limited in this application. The power spreading factor can also be called power weight, etc., which is not limited in this application.

[0056] For example, a power spread factor of 0.5 means that the reference signal corresponding to the power spread factor is transmitted at half the original power, and a power spread factor of 2 means that the reference signal corresponding to the power spread factor is transmitted at twice the original power.

[0057] The power spread factor is measured in dB. It can be the power value that is added to the original transmission power of each reference signal.

[0058] For example, a power spread factor of 10 means that the reference signal corresponding to the power spread factor is transmitted with a power increase of 10dB from the original power, and a power spread factor of -5 means that the reference signal corresponding to the power spread factor is transmitted with a power decrease of 5dB from the original power.

[0059] Optionally, different reference signals can be associated with different power spreading factors. If the terminal device determines the total transmission power of the first reference signal and the second reference signal as X, then the original transmission power corresponding to the first reference signal and the second reference signal can be X / 2. In this case, the terminal device can determine the final transmission power of the reference signal for different power spreading factors.

[0060] For example, when the unit of the original transmit power of the terminal-side communication device differs from the unit of the power spread factor, both need to be converted to the same unit before calculating the actual transmit power. If the power spread factor is a dB value and the unit of the original transmit power X / 2 is also dB, and the power spread factor corresponding to the first reference signal is 0.5, then the actual transmit power of the first reference signal can be 0.5 + X / 2; if the power spread factor corresponding to the second reference signal is 2, then the actual transmit power of the second reference signal can be 2 + X / 2; the actual total transmit power of the first and second reference signals can be X + 2.5.

[0061] If the power spread factor is linear and the original transmission power X / 2 is also linear, and the power spread factor corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5*X / 2; if the power spread factor corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2*X / 2; the actual total transmission power of the first and second reference signals can be X / 4+X=5X / 4.

[0062] If the power spread factor is linear and the original transmission power X / 2 is in dB, the power spread factor corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the power spread factor corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; the actual total transmission power of the first and second reference signals is in dB, and the value is X+10*log10(0.5)+10*log10(2).

[0063] Optionally, if the actual total transmission power of the first reference signal and the second reference signal is greater than the maximum transmission power of the terminal device, the actual transmission power of the first reference signal and the second reference signal is backed up to ensure that the actual total transmission power of the first reference signal and the second reference signal does not exceed the maximum transmission power of the terminal device.

[0064] In this way, the transmission of the first reference signal and the second reference signal can be made different by using different power spread factors, and the power resources can be made different by simple calculation, which is simple.

[0065] The first and second reference signals have different transmission powers, which can be achieved by using different transmission power offsets. Different reference signals can be configured with different transmission power offsets. The transmission power offset can be the difference between the transmission power of each reference signal and the reference power, or it can be the difference between the transmission power of each reference signal and the transmission power of a certain reference signal, or it can be the difference between the transmission power of each reference signal and the transmission power of the previous reference signal when the reference signals are ordered.

[0066] Optionally, different reference signals can be associated with different transmission power offsets. If the terminal device determines the total transmission power of the first reference signal and the second reference signal as X, then the original transmission power corresponding to the first reference signal and the second reference signal can be X / 2. In this case, the terminal device can determine the final transmission power of the reference signal for different transmission power offsets.

[0067] For example, the unit of the transmission power offset can be a linear value or a dB value. When the unit of the transmission power of the terminal-side communication device is different from the unit of the transmission power offset, they need to be converted to the same unit before calculating the actual transmission power. If the transmission power offset is a dB value and the unit of the original transmission power X / 2 is also dB, and the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5 + X / 2; if the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2 + X / 2; the actual total transmission power of the first and second reference signals can be X + 2.5.

[0068] If the transmission power offset is a linear value and the original transmission power X / 2 is also a linear value, the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5*X / 2; the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2*X / 2; the actual total transmission power of the first reference signal and the second reference signal can be X / 4+X=5X / 4; if the transmission power offset is a linear value and the original transmission power X / 2 is a dB value, the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; the actual total transmission power of the first reference signal and the second reference signal is in dB, and the value is X+10*log10(0.5)+10*log10(2);

[0069] Optionally, if the actual total transmission power of the first reference signal and the second reference signal is greater than the maximum transmission power of the terminal device, the actual transmission power of the first reference signal and the second reference signal is backed up to ensure that the actual total transmission power of the first reference signal and the second reference signal does not exceed the maximum transmission power of the terminal device.

[0070] Furthermore, the different transmission powers of the first and second reference signals can also be achieved through a power spreading factor and a transmission power offset. In this case, the power spreading factor can be a linear value, and the transmission power offset can also be a linear value; alternatively, the power spreading factor can be a dB value, and the transmission power offset can also be a dB value; alternatively, the power spreading factor can be a linear value, and the power offset can also be a dB value; alternatively, the power spreading factor can be a dB value, and the transmission power offset can also be a linear value. For specific implementation details, please refer to the examples above, which will not be elaborated upon here.

[0071] The first reference signal and the second reference signal have different transmission powers, which can be achieved by using different downlink path loss estimates.

[0072] Different reference signals are associated with the same or different path loss reference signals. Different downlink path loss estimates are estimated based on the path loss reference signals. Based on the downlink path loss estimates, different transmission powers are determined for different reference signals. This is applicable to ports with different channel qualities, which helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with better channel quality to the reference signals of other users.

[0073] Optionally, a first port with stronger channel quality corresponds to a smaller path loss estimate. Based on this smaller path loss estimate, the terminal device determines a lower transmission power to transmit the first reference signal corresponding to the first port with stronger channel quality. This helps reduce interference from the first reference signal to other users' reference signals. Conversely, a second port with weaker channel quality corresponds to a larger path loss estimate. Based on this larger path loss estimate, the terminal device determines a higher transmission power to transmit the second reference signal corresponding to the second port with weaker channel quality. This helps improve the channel estimation accuracy of the second reference signal at the second port with weaker channel quality.

[0074] The first and second reference signals have different transmission powers, which can be achieved using different frequency domain resources. Transmission power can be related to frequency domain resources; different transmission powers can be obtained by setting different frequency domain resources.

[0075] Optionally, different reference signals are associated with different frequency domain resources. The terminal device determines to use different transmission powers for different reference signals based on the frequency domain resources. This can be applied to ports with different channel qualities, which helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with good channel quality to the reference signals of other users.

[0076] Optionally, the first reference signal at the first port with stronger channel quality corresponds to a larger frequency domain resource, while the first reference signal at the second port with weaker channel quality corresponds to a smaller frequency domain resource. The frequency domain resource can be frequency domain bandwidth, the number of frequency domain resource blocks, or the number of frequency domain resource elements. The terminal device determines a first transmission power based on the frequency domain resources of the first reference signal, determines a second transmission power based on the frequency domain resources of the second reference signal, and then determines a third transmission power based on the first transmission power, the second transmission power, and the terminal device's maximum transmission power P. CMAX，f，c (i) A third transmission power is determined, and both the first reference signal and the second reference signal adopt the third transmission power. Since the frequency domain resources of the first reference signal are greater than those of the second reference signal, under the same transmission power, the frequency domain power spectral density of the first reference signal is less than that of the second reference signal. This is beneficial to improving the channel estimation accuracy of the second port with weaker channel quality and reducing the interference of the reference signal transmitted by the first port with stronger channel quality to the reference signals of other users.

[0077] In conjunction with the first aspect, in some possible implementations, when the downlink path loss estimate and frequency domain resources are used to determine the transmit power, the transmit power, the downlink path loss estimate, and the frequency domain resources satisfy at least one of the following formulas:

[0078]

[0079] or,

[0080]

[0081] or,

[0082]

[0083] or,

[0084]

[0085] or,

[0086]

[0087] or,

[0088]

[0089] or,

[0090]

[0091] When the transmit power is related to the transmit power offset, the transmit power and the transmit power offset satisfy the following formula:

[0092]

[0093] Where b represents the active uplink bandwidth, f represents the carrier, c represents the serving cell, and q represents the serving cell. s Denotes the set of reference signal resources, q d The reference signal resource index is used to calculate the downlink path loss estimate, l represents the reference signal power control adjustment status index, and P represents the reference signal resource resource index used to calculate the downlink path loss estimate. SRS，b，f，c (i, q) s ,l,g i The following parameters represent the serving cell c, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and reference signal resource set q determined by the terminal device. s g i The transmission power of the reference signal at the i-th transmission timing, P SRS，b，f，c (i, q) s l) represents the serving cell c, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and reference signal resource set q determined by the terminal device. s The transmission power of the reference signal at the i-th transmission time, M SRS，b，f，c (i) represents the frequency domain resources occupied by the reference signal at the i-th transmission time, M SRS，b，f，c (i, g) i) represents the frequency domain resources occupied by the gi-th reference signal during the i-th transmission. PL b，f，c (q d g i The following represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q determined by the terminal device. d The calculated downlink path loss estimate for the gi-th reference signal, PL b，f，c (q d The terminal device determines the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q. d The calculated downlink path loss estimate of the reference signal. P represents the transmit power offset of the gi-th reference signal, G represents the number of antenna ports used to transmit the gi-th reference signal, and P represents the transmit power offset of the gi-th reference signal. CMAX，f，c (i) represents the maximum frequency domain transmission power configured for serving cell c and carrier f during the i-th transmission of the reference signal, P O_SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource set q. s p0 provides α SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource set q. s The alpha provided in the middle, and h b，f，c (i, l) represents the power adjustment value of serving cell c, carrier f at the i-th transmission time of the reference signal, based on the power control adjustment state index l of the reference signal. μ is related to the subcarrier spacing and has a corresponding relationship with the subcarrier spacing. For example, when the subcarrier spacing is 15kHz, μ is 0; when the subcarrier spacing is 15kHz, μ is 1.

[0094] In conjunction with the first aspect, in some possible implementations, the first reference signal occupies the same time-domain resources as the reference signal.

[0095] Resources in the same time domain can be understood as those with the same symbol in the same time slot. This allows for more efficient use of limited time domain resources and reduces the probability of resource waste.

[0096] In conjunction with the first aspect, in some possible implementations, the first reference signal and the second reference signal correspond to different reference signal resources in the same set of reference resources.

[0097] The first reference signal can correspond to the first reference signal resource, the second reference signal can correspond to the second reference signal resource, and the first reference signal resource and the second reference signal resource can belong to the same set of reference signal resources.

[0098] In conjunction with the first aspect, in some possible implementations, the first reference signal corresponds to the first reference signal resource, the second reference signal corresponds to the second reference signal resource, and the number of ports included in the first reference signal resource is different from the number of ports included in the second reference signal resource.

[0099] Secondly, a communication method is provided. This method can be executed by a network-side communication device, or by other entities, and this application does not limit the scope of execution. The network-side communication device includes a network device, or a functional module within a network device, a communication module chip, a chip system or circuit, or a central unit (CU) or distributed unit (DU) within a network device, or a functional module within a network device capable of calling and executing a program. For ease of description, the following explanation uses execution by a network device as an example.

[0100] The method includes: receiving a first reference signal and a second reference signal, wherein the first reference signal and the second reference signal belong to the same set of reference signal resources, and at least one of the frequency domain resources or transmission power of the first reference signal and the second reference signal is different; obtaining a first channel of the first reference signal and a second channel of the second reference signal; and combining the first channel and the second channel to obtain a third channel.

[0101] In conjunction with the second aspect, in some possible implementations, the frequency domain resource is the frequency domain bandwidth occupied by at least one reference signal transmission; or, the frequency domain resource is the number of frequency domain resource blocks occupied by at least one reference signal transmission; or, the frequency domain resource is the number of frequency domain resource elements occupied by at least one reference signal transmission.

[0102] In conjunction with the second aspect, in some possible implementations, the first reference signal and the second reference signal have different frequency domain resources, and the first reference signal and the second reference signal also satisfy one or more of the following: the first reference signal and the second reference signal have the same transmission power; or, the first reference signal and the second reference signal have different power spectral densities; or, the frequency domain resources of the first reference signal and the second reference signal are in a multiple relationship; or, the first reference signal and the second reference signal have different transmission powers; or, the first reference signal and the second reference signal have the same power spectral density.

[0103] In conjunction with the second aspect, in some possible implementations, the frequency domain resources of the first reference signal and the second reference signal are different, including one or more of the following: the transmission combs of the first reference signal and the second reference signal are different, and the transmission combs are used to determine the frequency domain resources; or, the frequency hopping parameters of the first reference signal and the second reference signal are different, and the frequency hopping parameters are used to determine the frequency domain resources; or, the repetition factors of the first reference signal and the second reference signal are different, and the repetition factors are used to determine the frequency domain resources; or, the frequency domain spread factors of the first reference signal and the second reference signal are different, and the repetition factors are used to determine the frequency domain resources.

[0104] In conjunction with the second aspect, in some possible implementations, the first reference signal and the second reference signal correspond to the same reference signal count.

[0105] In conjunction with the second aspect, in some possible implementations, the first reference signal and the second reference signal have different transmission powers, and the first reference signal and the second reference signal also satisfy one or more of the following: the first reference signal and the second reference signal have the same frequency domain resources; or, the first reference signal and the second reference signal have different frequency domain resources; or, the first reference signal and the second reference signal have different power spectral densities; or, the first reference signal and the second reference signal have the same power spectral density; or, the transmission powers of the first reference signal and the second reference signal are in a multiple relationship.

[0106] In conjunction with the second aspect, in some possible implementations, the transmission powers of the first reference signal and the second reference signal are different, further including one or more of the following: the power spreading factors of the first reference signal and the second reference signal are different, and the power spreading factors are used to determine the transmission power; or, the transmission power offsets of the first reference signal and the second reference signal are different, and the transmission power offsets are used to determine the transmission power; or, the downlink path loss estimates of the first reference signal and the second reference signal are different, and the downlink path loss estimates are used to determine the transmission power; or, the frequency domain resources of the first reference signal and the second reference signal are different, and the frequency domain resources are used to determine the transmission power.

[0107] In conjunction with the second aspect, in some possible implementations, when the downlink path loss estimate and frequency domain resources are used to determine the transmit power, the transmit power, the downlink path loss estimate, and the frequency domain resources satisfy at least one of the following formulas:

[0108]

[0109] or,

[0110]

[0111] or,

[0112]

[0113] or,

[0114]

[0115] or,

[0116]

[0117] or,

[0118]

[0119] or,

[0120]

[0121] When the transmit power is related to the transmit power offset, the transmit power and the transmit power offset satisfy the following formula:

[0122]

[0123] Where b represents the active uplink bandwidth, f represents the carrier, c represents the serving cell, and q represents the serving cell. s Denotes the set of reference signal resources, q d The reference signal resource index is used to calculate the downlink path loss estimate, l represents the reference signal power control adjustment status index, and P represents the reference signal resource resource index used to calculate the downlink path loss estimate. SRS，b，f，c (i, q) s ,l,g i The following parameters represent the serving cell c, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and reference signal resource set q determined by the terminal device. s The transmission power P of the gi-th reference signal at the i-th transmission timing. SRS，b，f，c (i, q) s l) represents the serving cell c, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and reference signal resource set q determined by the terminal device. s The transmission power of the reference signal at the i-th transmission time, M SRS，b，f，c (i) represents the frequency domain resources occupied by the reference signal at the i-th transmission time, M SRS，b，f，c (i, g) i ) represents the frequency domain resources occupied by the gi-th reference signal during the i-th transmission. PL b，f，c (q d g i The following represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q determined by the terminal device. d The calculated downlink path loss estimate for the gi-th reference signal, PL b，f，c (q dThe terminal device determines the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q. d The calculated downlink path loss estimate of the reference signal. P represents the transmit power offset of the gi-th reference signal, G represents the number of antenna ports used to transmit the gi-th reference signal, and P represents the transmit power offset of the gi-th reference signal. CMAX，f，c (i) represents the maximum frequency domain transmission power configured for serving cell c and carrier f during the i-th transmission of the reference signal, P O_SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource set q. s p0 provides α SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource set q. s The alpha provided in the middle, and h b，f，c (i, l) represents the power adjustment value of serving cell c, carrier f at the i-th transmission time of the reference signal, based on the power control adjustment state index l of the reference signal. μ is related to the subcarrier spacing and has a corresponding relationship with the subcarrier spacing. For example, when the subcarrier spacing is 15kHz, μ is 0; when the subcarrier spacing is 15kHz, μ is 1.

[0124] In conjunction with the second aspect, in some possible implementations, the first reference signal and the reference signal occupy the same time-domain resources.

[0125] In conjunction with the second aspect, in some possible implementations, the first reference signal and the second reference signal correspond to different reference signal resources in the same set of reference resources.

[0126] In conjunction with the second aspect, in some possible implementations, the first reference signal corresponds to the first reference signal resource, the second reference signal corresponds to the second reference signal resource, and the number of ports included in the first reference signal resource is different from the number of ports included in the second reference signal resource.

[0127] Thirdly, a communication apparatus is provided for performing the method in any of the possible implementations of the first and second aspects described above. Specifically, the apparatus may include units and / or modules for performing the method in any of the possible implementations of the first and second aspects, such as processing units and / or communication units.

[0128] In one implementation, the device is a communication device (such as a terminal device or a network device). When the device is a communication device, the communication unit can be a transceiver or an input / output interface; the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0129] In another implementation, the device is a chip, chip system, circuit, or communication module for communication equipment (such as terminal equipment or network equipment). When the device is a chip, chip system, or circuit for communication equipment, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit may be at least one processor, processing circuit, or logic circuit.

[0130] Fourthly, a communication device is provided, comprising: at least one processor for executing a computer program or instructions to perform the method in any of the possible implementations of the first and second aspects described above. Optionally, the device further comprises a memory for storing the computer program or instructions. Optionally, the device further comprises a communication interface coupled to the processor, which can be used to input the computer program or instructions to the processor or to output information from the processor.

[0131] In one implementation, the device is a communication device (such as a terminal device or a network device).

[0132] In another implementation, the device is a chip, chip system, circuit, or communication module for communication equipment (such as terminal equipment or network equipment).

[0133] Fifthly, a processor is provided for executing the method provided in either the first or second aspect described above.

[0134] Unless otherwise specified, or if it does not contradict its actual function or internal logic in the relevant description, the transmission and acquisition / reception operations involved in the processor can be understood as processor output and reception, input and other operations, or as transmission and reception operations performed by radio frequency circuits and antennas. This application does not limit them in this regard.

[0135] Optionally, the device further includes: a memory for storing a program; correspondingly, at least one processor for executing the computer program or instructions in the memory.

[0136] Optionally, the device also includes a communication interface. The communication interface is coupled to the processor and can be used to input information to the processor or output information from the processor.

[0137] A sixth aspect provides a computer-readable storage medium storing program code for executing a device, the program code including methods for performing any of the possible implementations of the first and second aspects described above.

[0138] In a seventh aspect, a computer program product comprising instructions is provided, which, when run on a computer, causes the computer to perform the method in any of the possible implementations of the first and second aspects described above.

[0139] Eighthly, a chip is provided, the chip including a processor and a communication interface, wherein the processor reads instructions from a memory through the communication interface and executes the method provided in any of the implementations of the first and second aspects described above.

[0140] Optionally, the chip is a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core.

[0141] Optionally, as one implementation, the chip also includes a memory storing computer programs or instructions, and a processor for executing the computer programs or instructions in the memory. When the computer programs or instructions are executed, the processor is used to execute the method provided by any of the above implementations of the first and second aspects.

[0142] Ninth aspect, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to perform the method provided by any of the above implementations of the first and second aspects.

[0143] In a tenth aspect, a communication system is provided, including the aforementioned terminal equipment and network equipment. Attached Figure Description

[0144] Figure 1 This is a schematic diagram of a wireless communication system applicable to an embodiment of this application;

[0145] Figure 2 This is a schematic diagram of another wireless communication system to which the embodiments of this application apply;

[0146] Figure 3 This is a schematic diagram of an SRS transmission provided in an embodiment of this application;

[0147] Figure 4 This is a schematic diagram illustrating the number of combs, comb offset, and subcarrier relationship provided in an embodiment of this application;

[0148] Figure 5 This is a schematic diagram of a frequency hopping SRS transmission provided in an embodiment of this application;

[0149] Figure 6 This is a schematic diagram of frequency hopping characteristics within a time slot provided in an embodiment of this application;

[0150] Figure 7 This is a schematic diagram of frequency hopping characteristics between time slots provided in an embodiment of this application;

[0151] Figure 8 This is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0152] Figure 9 This is a schematic flowchart of another signal transmission method provided in an embodiment of this application;

[0153] Figure 10 This is a schematic diagram of a communication device provided in an embodiment of this application;

[0154] Figure 11 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0155] Figure 12 This is a schematic diagram of a chip system provided in an embodiment of this application;

[0156] Figure 13 This is a schematic diagram of another communication device provided in the embodiments of this application. Detailed Implementation

[0157] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0158] The technical solutions provided in this application can be applied to various communication systems, such as 5th generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, and LTE time division duplex (TDD) systems. The technical solutions provided in this application can also be applied to future communication systems. Furthermore, the technical solutions provided in this application can be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems. The technical solutions provided in this application can also be applied to low-frequency scenarios, high-frequency scenarios, and terahertz frequencies.

[0159] The technical solutions provided in this application can also be applied to non-terrestrial network (NTN) systems such as inter-satellite communication and satellite communication. As an example, a satellite communication system includes a satellite base station and terminal equipment. The satellite base station provides communication services to the terminal equipment. The satellite base station can also communicate with other base stations. A satellite can act as a base station or as a terminal device. Here, "satellite" can refer to unmanned aerial vehicles (UAVs), hot air balloons, low-Earth orbit (LEO) satellites, medium-Earth orbit (MEO) satellites, high-Earth orbit (HEO) satellites, etc. "Satellite" can also refer to non-terrestrial base stations or non-terrestrial equipment, etc.

[0160] In a communication system, a device can send signals to or receive signals from another device. These signals can include information, signaling, or data. The term "device" can also be replaced by an entity, network entity, network element, communication equipment, communication module, node, communication node, etc. This disclosure uses "device" as an example. For instance, a communication system can include at least one terminal device and at least one network device. The network device can send downlink signals to the terminal device, and / or the terminal device can send uplink signals to the network device.

[0161] The terminal device in this application embodiment can be a device or module that accesses the aforementioned communication system and has corresponding communication functions. The terminal device can include various devices with wireless communication capabilities, which can be used to connect people, objects, machines, etc. The terminal device can be widely applied in various scenarios, such as: cellular communication, D2D, V2X, peer-to-peer (P2P), M2M, MTC, IoT, virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, robots, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery, etc. The terminal device can be a terminal in any of the above scenarios, such as an MTC terminal, an IoT terminal, etc. Terminal equipment can be user equipment (UE), terminal, fixed equipment, mobile station equipment or mobile equipment, subscriber unit, handheld device, vehicle-mounted equipment, wearable device, cellular phone, smartphone, SIP phone, wireless data card, personal digital assistant (PDA), computer, tablet computer, laptop computer, wireless modem, handset, laptop computer, computer with wireless transceiver capability, smart book, vehicle, satellite, global positioning system (GPS) device, target tracking device, aircraft (e.g., drone, helicopter, multi-helicopter, quad-helicopter, or airplane), boat, remote control device, smart home device, industrial equipment, transport vehicle with wireless communication capability, communication module, roadside unit (RSU) with terminal function, or devices built into the above devices (e.g., communication modules, modems, or chips in the above devices), or other processing devices connected to a wireless modem. For ease of description, the terminal device will be described below using the terminal or UE as an example.

[0162] It should be understood that in certain scenarios, a UE can also be used as a base station. For example, a UE can act as a scheduling entity, providing sidelink signaling between UEs in scenarios such as V2X, D2D, or P2P.

[0163] In this embodiment, the device for implementing the functions of a terminal device, i.e., the terminal device, can be the terminal device itself, or it can be any device capable of supporting the terminal device in implementing the functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions). This device can be installed in the terminal device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. Furthermore, the device can also be configured with program instructions for performing corresponding communication functions.

[0164] The network device in this application embodiment can be a device or module with corresponding communication functions. The network device can be a device used to communicate with terminal devices; it can also be called an access network device or a wireless access network device, such as a base station. In this application embodiment, the network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. A base station can broadly encompass, or be replaced by, various names including: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitter, master station, auxiliary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), CU, DU, positioning node, etc. A base station can be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, a device that performs base station functions in D2D, V2X, and M2M communications, a network-side device in future communication networks, or a device that performs base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or device forms used in the network equipment.

[0165] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0166] In some deployments, the network devices mentioned in the embodiments of this application may be devices including CU, DU, or CU and DU, or devices with control plane CU nodes (central unit-control plane (CU-CP)) and user plane CU nodes (central unit-user plane (CU-UP)) and DU nodes. For example, the network devices may include gNB-CU-CP, gNB-CU-UP, and gNB-DU.

[0167] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or radio units (RUs). CUs and DUs can be set up separately or included in the same network element, such as a BBU. RUs can be included in radio equipment or radio units, such as RRUs, AAUs, or RRHs.

[0168] In some deployments, the CU (Core Unit) is a logical node that carries the Radio Resource Control (RRC) layer, Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, and other control functions of the access network equipment. The CU connects to network nodes such as the core network through interfaces, which may be E2 interfaces, etc. Optionally, the CU possesses some core network functions. The CU (e.g., the PDCP layer and higher layers) connects to the DU (e.g., the Radio Link Control (RLC) layer and lower layers) through interfaces, which may be F1 interfaces, etc. In some examples, these interfaces (e.g., the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (e.g., interface management, system information management, UE context management, RRC message transmission, etc.). The F1 application protocol (F1AP) is the application protocol for the F1 interface, and in some examples, it defines the F1 signaling procedures. The F1 interface supports both the control plane (F1-C) and the user plane (F1-U).

[0169] In some deployments, the CU can be split into CU-CP and CU-UP. CU-CP is a logical node carrying the RRC layer and the control plane part of PDCP (PDCP-C) layer, used to implement the CU's control plane functions. CU-CP can interact with network elements in the core network used to implement control plane functions. These network elements in the core network can be access and mobility function network elements. CU-UP is a logical node carrying the SDAP layer and the user plane part of PDCP (PDCP-U) layer, used to implement the CU's user plane functions. CU-UP can interact with network elements in the core network used to implement user plane functions. The above CU and DU configurations are merely examples; the functions of CU and DU can be configured as needed. For example, CU or DU can be configured to have more protocol layer functions, or CU or DU can be configured to have only partial protocol layer processing functions. For example, some functions of the RLC layer and the functions of the protocol layer above the RLC layer can be placed in the CU, while the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer can be placed in the DU. Another example is that the functions of the CU or DU can be divided according to service type or other system requirements. For instance, based on latency, functions that need to meet low latency requirements can be placed in the DU, while functions that do not need to meet such latency requirements can be placed in the CU.

[0170] In some deployments, the DU (Distributed Unit) is a logical node that carries the RLC (Real-Time Control) layer, the medium access control (MAC) layer, the higher physical layer (Higher PHY) layer, and other functions. In some examples, the DU can control at least one RU (Remote Root). The DU connects to the RU through interfaces, which can be fronthaul interfaces. In some examples, the Higher PHY layer includes the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation, and demodulation.

[0171] In some deployments, the RU is a logical node that carries both lower physical layer (PHY) and radio frequency (RF) processing. In some examples, the RU can be a TRP, RRH, or other similar entity. In some examples, the Low-PHY includes portions of the PHY processing, such as Fast Fourier Transform (FFT), Inverse Fast Fourier Transform (IFFT), digital beamforming, and filtering. The RU communicates with one or more UEs via a radio link.

[0172] The DU and RU can be co-located or not. The DU and RU exchange control plane and user plane information via a fronthaul link through a lower-layer split-control, user, and synchronization (LLS-CUS) interface. LLS-CUS may include interfaces providing control and user planes respectively. In some examples, the control plane refers to real-time control between the DU and RU. The DU and RU exchange management information via a fronthaul link interface (such as an LLS-M interface), and the management plane (M-Plane) refers to non-real-time management operations between the DU and RU.

[0173] DU and RU can cooperate to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in various ways depending on the design. For example, a DU can be configured to implement baseband functions, and an RU can be configured to implement mid-RF functions. Another example is that a DU can be configured to implement higher-level functions in the PHY layer, and an RU can be configured to implement lower-level functions in the PHY layer, or to implement both lower-level and RF functions. Higher-level functions in the physical layer can include a portion of the physical layer's functions that are closer to the MAC layer, while lower-level functions in the physical layer can include another portion of the physical layer's functions that are closer to the mid-RF side.

[0174] In one possible design, the processing unit in the BBU used to implement baseband functions is called the baseband high (BBH) unit, and the processing unit in the RRU / AAU / RRH used to implement baseband functions is called the baseband low (BBL) unit.

[0175] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, a radio access network can also be an open radio access network (O-RAN) architecture. In an O-RAN system, CU can also be called an open CU (open CU, O-CU), DU can also be called an open DU (open DU, O-DU), CU-CP can also be called an open CU-CP (O-CU-CP), CU-UP can also be called an open CU-UP (O-CU-UP), and RU can also be called an open RU (open RU, O-RU). Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0176] In this embodiment, the device for implementing the functions of a network device can be a network device itself, or a device capable of supporting the network device in implementing those functions, such as a chip system, chip, circuit, or communication module (i.e., a communication module that performs communication functions). This device can be installed within the network device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices. Furthermore, the device can be configured with program instructions for performing corresponding communication functions. This embodiment only uses a network device as an example to illustrate the device for implementing the functions of a network device, and does not limit the solution of this embodiment.

[0177] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located. Furthermore, terminal devices and network devices can be hardware devices, software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal devices and network devices.

[0178] First, a brief introduction to the communication system applicable to the embodiments of this application will be given.

[0179] For example, Figure 1 This is a schematic diagram of a wireless communication system applicable to an embodiment of this application. For example... Figure 1As shown, the wireless communication system includes a wireless access network 100. The wireless access network 100 can be a future (e.g., a future communication system) wireless access network or a traditional (e.g., 5G, 4G, 3G, or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 12) can be interconnected or connected to one or more network devices (110a, 110b, collectively referred to as 110) within the wireless access network 100. Network elements in the wireless communication system are connected via interfaces (e.g., next-generation interface (NG), Xn) or air interfaces.

[0180] Figure 1 This is just an illustration; the wireless communication system may also include other devices, such as core network (CN) equipment, wireless relay equipment, and / or wireless backhaul equipment. Figure 1 It is not shown in the middle.

[0181] For example, Figure 2 This is a schematic diagram of another wireless communication system to which embodiments of this application apply. For example... Figure 2 As shown, this wireless communication system may include core network equipment, access network equipment (such as RAN), and terminal equipment. Access network equipment communicates with the core network equipment via a backhaul link and with the terminal equipment via an air interface. For example, a BBU in the access network equipment communicates with the core network via a backhaul link, while an RU in the access network equipment communicates with the terminal equipment via an air interface. The BBU can communicate with the RU via a fronthaul link. The BBU and RU may or may not be co-located. In some deployments, the BBU includes at least one CU and at least one DU, and the CU and DU communicate with each other via a midhaul link.

[0182] Figure 2 This is just an illustration; the wireless communication system may also include other devices. Figure 2 It is not shown in the middle.

[0183] To facilitate a better understanding of the technical solution of this application, some related technologies involved in the technical solution of this application are introduced.

[0184] 1. Reference signal (RS)

[0185] Reference signals, also known as pilot signals, are essential in communication systems for transmitting and receiving data, obtaining system synchronization and feedback channel information, and estimating the uplink or downlink channel. Channel estimation refers to the process of reconstructing or recovering the received signal to compensate for signal distortion caused by channel fading and noise. It utilizes reference signals known to the transmitter and receiver to detect changes in the channel's time and frequency domains. These reference signals, distributed across different resource elements (REs) in the time-frequency two-dimensional space within orthogonal frequency division multiplexing (OFDM) symbols, have known amplitudes and phases.

[0186] At the physical layer, uplink communication can include the transmission of uplink physical channels and uplink signals. Uplink physical channels include the random access channel (PRACH), the physical uplink control channel (PUCCH), and the physical uplink shared channel (PUSCH), etc. Uplink signals include the sounding reference signal (SRS), the PUCCH de-modulation reference signal (PUCCH-DMRS), the PUSCH demodulation reference signal (PUSCH-DMRS), the phase noise tracking reference signal (PTRS), and the uplink positioning signal (RS), etc.

[0187] At the physical layer, downlink communication can include the transmission of downlink physical channels and downlink signals. Downlink physical channels include the physical broadcast channel (PBCH), the physical downlink control channel (PDCCH), and the physical downlink shared channel (PDSCH). Downlink signals include the primary synchronization signal (PSS) / secondary synchronization signal (SSS), the downlink control channel demodulation reference signal (PDCCH-DMRS), the downlink data channel demodulation reference signal (PDSCH-DMRS), the phase noise tracking signal (PTRS), the channel status information reference signal (CSI-RS), the cell reference signal (CRS) (not present in NR), the time / frequency tracking reference signal (TRS), and the LTE / NR positioning signal (positioning RS).

[0188] 2. Antenna Port

[0189] An antenna port is a logical concept; there is no direct correspondence between an antenna port and a physical antenna. An antenna port is typically associated with a reference signal, and its meaning can be understood as a transmit / receive interface on the channel through which the reference signal passes. Therefore, in some cases, an antenna port can also be called a reference signal port or a pilot port.

[0190] For low-frequency systems, an antenna port may correspond to one or more antenna elements that jointly transmit a reference signal. The receiver can treat them as a whole without distinguishing between the individual elements. For high-frequency systems, an antenna port may correspond to a beam. Similarly, the receiver only needs to treat this beam as an interface and does not need to distinguish between each element.

[0191] In this embodiment of the application, the multiple ports included in a probe reference signal resource can be referred to as probe reference signal ports, or antenna ports.

[0192] 3. Sounding reference signal (SRS)

[0193] SRS (Uplink Channel Sounding) is transmitted by the terminal and received by the network device. The transmission method of SRS, including time-frequency resources, transmission beam, and transmission power, is configured by the network device for the terminal. In the protocol framework of 3GPP Release 15 (R15), the network device can configure one or more SRS resource sets for the terminal, and each SRS resource set contains one or more SRS resources. Furthermore, in 3GPP R15, different SRS resource sets perform different functions; R15 supports four functions: {beamManagement, codebook, non-codebook, antennaSwitching}. The network device informs the terminal of the function of each SRS resource set by configuring the usage of each set through RRC (Remote Reference Code). In this document, the abbreviations {BM, CB, NCB, AS} will be used in some places. When using antennaSwitching, it is generally used to obtain complete uplink channel information. If the channel has uplink / downlink consistency, the downlink transmission channel (or downlink transmission precoding) can be obtained through uplink channel measurement.

[0194] The following is a detailed explanation of the SRS transmission method.

[0195] Network devices can configure one or more SRS resource sets for terminal devices via RRC configuration messages or RRC reconfiguration messages. SRS resource sets are used to allocate resources for SRS transmission. An SRS resource set contains one or more SRS resources, which include time-domain or frequency-domain resources for SRS signal transmission; an SRS resource also includes one or more antenna ports for SRS signal transmission. In other words, an SRS resource set indicates one or more time-frequency domain resources and one or more antenna ports used for SRS transmission.

[0196] Optionally, an SRS resource set may include a usage indication ('usage') that describes the purpose of the SRS resource set. Specifically, the purpose may be antenna switching, codebook, non-codebook, or beam management.

[0197] Optionally, by receiving and measuring the SRS signals corresponding to the SRS resource set used for antenna switching, the network device can obtain the channel status information (CSI) of the downlink, which is reciprocal between the uplink and downlink channels. When SRS is used for downlink data transmission weight measurement, and the number of downlink receive antenna ports is greater than the number of uplink transmit antenna ports, multiple SRS resources will be configured for the user. Different SRS resources use different antenna ports to transmit SRS signals. Based on the SRS signals transmitted by multiple SRS resources, the network device obtains the downlink channel measurement channel and calculates the weights for downlink data transmission based on the assumption of uplink-downlink channel reciprocity.

[0198] For example, Figure 3 A schematic diagram of an SRS transmission is shown. (For example...) Figure 3 As shown, terminal device 310 includes four antennas. It can send uplink signals to network device 320 through two antennas and receive downlink signals from network device 320 through the four antennas. This scenario can be called a 2-transmitters-4-receivers (2T4R) scenario.

[0199] Network device 320 can configure an SRS resource set for antenna switching (usage = antenna switching) for terminal device 310. This SRS resource set contains two SRS resources, and each SRS resource contains two SRS antenna ports. Thus, an SRS resource set includes a total of 4 antenna ports, which can be one-to-one with 4 antennas. These 4 antenna ports are antenna port 1, antenna port 2, antenna port 3, and antenna port 4.

[0200] Of the two SRS resources, the time-frequency resources allocated to the first SRS resource can be used to transmit SRS signals via antenna ports 1 and 2, while the time-frequency resources allocated to the second SRS resource can be used to transmit SRS signals via antenna ports 3 and 4. Network device 320 can perform SRS reception measurements and calculate downlink data transmission weight vectors using the time-frequency resources allocated to these two SRS resources.

[0201] Optionally, by receiving and measuring the SRS signals corresponding to the SRS resource set used as a codebook, the network device can obtain the uplink CSI. That is, when the uplink of the terminal device uses codebook as the precoding method, the network device obtains the uplink transmission precoding matrix indicator (TPMI) by receiving and measuring the SRS signals, and indicates the transmission precoding used by the uplink to the terminal device through the TPMI and the SRS resource indicator (SRI).

[0202] Optionally, by receiving and measuring the SRS signals corresponding to the SRS resource set used for non-codebook purposes, the network device can obtain the uplink CSI; that is, when the precoding method used by the uplink of the terminal device is non-codebook, the network device obtains the uplink transmission precoding weights by receiving and measuring the SRS signals, and indicates the transmission precoding used by the uplink to the terminal device through the SRI.

[0203] Optionally, by observing the reception and measurement behavior of SRS signals corresponding to the SRS resource set used for beam management, the network device can select transmit and receive beams for uplink and downlink transmission of the terminal device.

[0204] Optionally, the type of SRS resource set can be configured as periodic, semi-static, or aperiodic. The configuration information for periodic SRS resources includes the period (e.g., 2ms, 5ms, 10ms, etc.) and offset parameters. After the network device configures the SRS resource via RRC signaling, the terminal device will transmit SRS on the determined SRS resource within a specific periodic slot according to the configuration information. The configuration information for aperiodic SRS resources does not include the period and offset parameters, but instead includes a time-domain offset parameter K of the downlink control information (DCI) signaling that triggers the SRS. When the terminal device receives DCI signaling at time n, and the signaling indicates that the SRS is triggered, it will transmit SRS on the corresponding SRS resource at time n+K, where K and n are positive integers.

[0205] Optionally, there is a mapping relationship between the SRS port (also known as the antenna port) and the SRS time-frequency domain resources. That is, the SRS information configuration indicates that a specific SRS port transmits SRS on a specific SRS time-frequency domain resource. The SRS time domain resources can span N adjacent symbols within a time slot, or occupy multiple symbols in different time slots.

[0206] Optionally, the SRS resource sets of different terminal devices may occupy the same time domain symbols or the same frequency domain bandwidth.

[0207] In one possible implementation, the SRS resource sets of different terminal devices can occupy the same time domain symbols but different frequency domain bandwidths.

[0208] For example, different terminal devices can use different subcarriers to transmit SRS. The terminal device may not transmit SRS on every subcarrier, but instead select a specific set of subcarrier bundles based on the transmission comb value. For instance, the terminal device can use the configured number of transmission combs and comb offset to determine the specific subcarriers it uses.

[0209] For example, Figure 4 A schematic diagram illustrating the number of combs, comb offset, and subcarrier relationship is shown. Figure 4 As shown, a resource block (RB) consists of 12 subcarriers. When the comb count is 2, it means that either of the two terminal devices occupies 6 subcarriers on one RB. These two terminal devices can be Terminal Device 1 and Terminal Device 2. The comb offset can be either comb offset 0 or comb offset 1.

[0210] The network device can configure terminal device 1 with 2 combs and a comb offset of 0 (combOffset=0). Terminal device 1 can use subcarriers 1, 3, 5, 7, 9, and 11 to transmit SRS. The network device can configure terminal device 2 with 2 combs and a comb offset of 1 (combOffset=1). Terminal device 2 can use subcarriers 2, 4, 6, 8, 10, and 12 to transmit SRS.

[0211] When the number of combs is configured to a value greater than 1, different terminal devices are allowed to use frequency division multiplexing within the same OFDM symbol. This means different terminal devices can use different subcarriers within the same RB (Radio Base) of the same OFDM symbol to transmit SRS. For example, a transmission comb spacing of 2 allows two groups of terminal devices to use frequency multiplexing with a single subcarrier offset between the two groups. A larger number of combs allows for more users to be multiplexed within the same OFDM symbol, but fewer resource elements are available per user for transmitting SRS. In this case, the quality of SRS measurements may be degraded.

[0212] In another possible implementation, different terminal devices occupy the same resource elements and send SRS using different cyclically shifted base sequences.

[0213] For example, each terminal device can be configured to send a base sequence with a specific cyclic shift (e.g., a "Zadoff-Chu sequence") as the SRS. That is, by selecting a base sequence and using different cyclic shifts to shift each SRS, the SRS are orthogonalized. The SRS sent by terminal device 1 using the first cyclic shift and the SRS sent by terminal device 2 using the second cyclic shift are orthogonal. Therefore, even if terminal device 1 and terminal device 2 occupy the same resource elements, the interference between the SRS received by the network device from terminal device 1 and terminal device 2 is minimal. The length of the base sequence can be equal to the number of resource elements allocated to the SRS, i.e., it is related to the number of resource blocks allocated to the SRS and the number of combs used; the number of usable cyclic shifts is related to the number of combs allocated to each SRS.

[0214] For example, when the number of combs is 2, the maximum number of usable circular shifts is 8; when the number of combs is 4, the maximum number of usable circular shifts is 12; and when the number of combs is 8, the maximum number of usable circular shifts is 6.

[0215] The aforementioned different cyclic shifts can also be assigned to multiple antenna ports of the same terminal device to transmit SRS; for example, an SRS resource set of a terminal device contains two SRS resources, namely the first SRS resource and the second SRS resource. The first SRS resource contains antenna port 1 and antenna port 2, and the second SRS resource contains antenna port 3 and antenna port 4; four cyclic shifts can be configured to transmit SRS to the four antenna ports of the terminal device.

[0216] Optionally, the terminal device can transmit SRS via frequency hopping, meaning that multiple SRS transmissions from a single terminal device can switch between different frequency bands. It should be understood that frequency hopping refers to the switching of multiple SRS transmissions from a terminal device between different frequency bands within the frequency domain resources.

[0217] For example, when the transmission bandwidth of a single SRS transmission by a terminal device is less than the maximum value for SRS transmission bandwidth (e.g., 272 resource blocks), the terminal device may use frequency hopping to configure SRS resources and transmit SRS using different portions of the SRS transmission bandwidth.

[0218] For example, in the NR protocol, the uplink power of the SRS sent by the terminal device to the network device is limited, resulting in low accuracy of the channel state information obtained by the network device based on the received SRS reference signal. To improve the accuracy of channel estimation obtained by the network device based on SRS, the bandwidth of the SRS sent by the terminal device in a single transmission can be reduced, and the frequency power spectral density of the SRS can be increased, thereby ensuring the uplink power of a single SRS transmission and improving the accuracy of the channel state information obtained by the network device.

[0219] For example, Figure 5 This is a schematic diagram of a frequency-hopping SRS transmission. Figure 5 The diagram illustrates single-bandwidth SRS transmission, two-subband frequency-hopping SRS transmissions, and four-subband frequency-hopping SRS transmissions. In the multiple subband frequency-hopping SRS transmissions, the frequency domain resource location for each SRS frequency hopping transmission is random, and the sequence of each SRS frequency hopping transmission is independent.

[0220] In the frequency domain, SRS transmission can cover the downlink transmission bandwidth. There are several possible implementation methods for this.

[0221] In one possible implementation, SRS transmission can cover broadband SRS, that is, using a single SRS transmission to cover the entire frequency band.

[0222] In another possible implementation, SRS transmission can cover narrowband SRS, i.e., multiple SRS transmissions, through frequency hopping, cover the entire frequency band. Narrowband SRS allows available transmission power to be concentrated over a narrower frequency range, improving the quality of channel estimation.

[0223] SRS can support frequency hopping transmission, and the specific frequency hopping characteristics can be determined by parameters in both the time domain and the frequency domain.

[0224] In the time domain: SRS can occupy Ns = {1, 2, 4} symbols in one time slot, with a repetition factor R = {1, 2, 4}, and R <= Ns. The repetition factor refers to the number of times the symbol is repeated (R times). The repetition factor can also be called a repetition parameter, but this application does not limit its application to this specific parameter.

[0225] R is used for the SRS frequency hopping characteristics of different symbols within a time slot. When R = Ns, frequency hopping transmission within a time slot is not supported. When R = 1, Ns = 2, 4, SRS transmission within a time slot is supported, specifically with one OFDM symbol as the unit of frequency hopping. When R = 2, Ns = 4, SRS transmission within a time slot is supported, specifically with one pair of OFDM symbols (i.e., 2 OFDM symbols) as the unit of frequency hopping.

[0226] For example, Figure 6 A schematic diagram of frequency hopping characteristics within a time slot is shown. For example... Figure 6 As shown in Figure a, when R=1 and Ns=2, the SRS occupies 2 symbols in the time domain and hops frequency in units of one OFDM symbol, transmitting in a frequency-hopping manner within the time slot. For example... Figure 6 As shown in b, when R=1 and Ns=4, SRS occupies 4 symbols in the time domain and hops frequency in units of one OFDM symbol, transmitting in a frequency-hopping manner within the time slot. Figure 6As shown in c, when R=2 and Ns=4, SRS occupies 4 symbols in the time domain and hops in units of two OFDM symbols, transmitting in a frequency-hopping manner within the time slot.

[0227] For periodic SRS and semi-static SRS, corresponding period and time-domain offset parameters need to be configured. Periodic SRS and semi-static SRS can be transmitted in frequency hopping mode within a time slot or in frequency hopping mode between time slots (i.e., according to the SRS period). Aperiodic SRS frequency hopping can only be performed within a time slot (i.e., all hopping is completed after one trigger).

[0228] R is also used for SRS frequency hopping characteristics between different symbols in time slots.

[0229] For example, Figure 7 A schematic diagram of frequency hopping characteristics between time slots is shown. For example... Figure 7 As shown in 'a', when R = Ns = 1, SRS occupies 1 symbol in each time slot and is transmitted via frequency hopping between different time slots. For example... Figure 7 As shown in b, when R=1 and Ns=2, the SRS occupies 2 symbols in each time slot, and frequency hopping is performed in units of one OFDM symbol within each time slot. Figure 7 As shown in c, when R=2 and Ns=2, the SRS occupies 2 symbols in each time slot, and frequency hopping within each time slot is based on a pair of OFDM symbols. Figure 7 As shown in d, when R=1 and Ns=4, the SRS occupies 4 symbols in each time slot, and frequency hopping is performed in units of one OFDM symbol within each time slot. Figure 7 As shown in e, when R=2 and Ns=4, the SRS occupies 4 symbols in each time slot, and frequency hopping is performed in pairs of OFDM symbols within each time slot. Figure 7 As shown in f, when R=4 and Ns=4, SRS occupies 4 symbols in each time slot, and frequency hopping is performed in units of two pairs of OFDM symbols within each time slot.

[0230] In the frequency domain: Network devices can configure SRS resources for terminal devices via RRC signaling. The RRC signaling can indicate the number of ports included in the SRS resource, its frequency and time domain location, usage period, comb teeth, cyclic shift value, and sequence identifier (ID). The frequency domain location of the SRS resource is determined by a set of frequency domain parameters in the RRC signaling (in existing 3GPP protocols, these parameters may include n). RRC n shift B SRS C SRS b hopTerminal devices can determine the bandwidth and starting position of the frequency domain occupied by the SRS through these frequency domain parameters and the rules predetermined by the protocol. Among them, b hop It can also be represented as b hopping This application does not limit the scope of the embodiments.

[0231] Among them, C SRS Index number B configured for cell-specific SRS bandwidth. SRS Configure an index number for the user-specific SRS bandwidth, b hop Indicates whether SRS frequency hopping is performed (or in other words, indicates the frequency hopping bandwidth occupied by SRS on one symbol), n shift The offset value that indicates the starting frequency of the uplink system bandwidth available for SRS transmission (or the starting frequency domain position of the SRS frequency hopping bandwidth), n RRC Indicates the frequency domain starting position index of the user's SRS (or the frequency domain position of the starting frequency hopping subband of the SRS).

[0232] The starting position of the SRS frequency domain is determined by the parameter n configured for the terminal device by the network device. RRC and parameter n shift Determine the overall frequency domain starting position of the SRS.

[0233] SRS configured bandwidth (or frequency hopping bandwidth): The terminal device is configured with parameters b by the network device according to the parameters b configured for the terminal device. hop and parameter C SRS And the number of RBs m that the SRS accounts for in total is determined in Table 1 below. SRS，b′ , where b′=b hop For example, suppose b hop =0, C SRS =9, by looking up Table 1, we can determine m SRS，b′ =32.

[0234] Bandwidth occupied by each symbol of SRS (or bandwidth occupied by a frequency hopping subband): The terminal device uses parameter B configured by the network device for the terminal device. SRS and parameter C SRS And the number of RBs m that SRS occupies on each symbol is determined in Table 1 below. SRS b, where b = B SRS For example, suppose B SRS =2, C SRS =9, by looking up Table 1, we can determine m SRS b = 8.

[0235] In one example, the SRS frequency hopping characteristic can be determined by b hop and B SRS The configuration is determined jointly. When bhop ≥B SRS At this time, the terminal device does not enable frequency hopping. That is, the terminal device transmits SRS in a non-frequency hopping manner. It should be understood that when transmitting SRS in a non-frequency hopping manner, the SRS transmitted by the terminal device in one transmission covers the entire configured bandwidth of the SRS resource.

[0236] When b hop SRS When this occurs, the terminal device enables frequency hopping. That is, the terminal device transmits SRS in frequency hopping mode. It should be understood that when transmitting SRS in frequency hopping mode, each SRS transmitted by the terminal device only covers a portion of the configured bandwidth of the SRS resource (i.e., one frequency hopping subband). The terminal device can transmit SRS multiple times within one frequency hopping cycle to cover the entire configured bandwidth of the SRS resource.

[0237] For example, a 16RB bandwidth can be achieved by sending a single 16RB SRS, or by sending 8RB SRS in two frequency hops, or by sending 4RB SRS in four frequency hops. The specific frequency hopping pattern is predefined by the protocol. When the user's total SRS bandwidth and frequency hopping bandwidth are the same, only the same frequency hopping pattern can be used. Furthermore, in multi-level frequency hopping, the previous level's frequency band is always hopped completely before hopping to the next level. For example, in four-level sub-band frequency hopping, the 16RB is first divided into two 8RBs, then the 8RBs are divided into two 4RBs. The first two hops send the same 4RB from the two 8RBs, and the last two hops send the other 4RB from the two 8RBs.

[0238] Table 1

[0239]

[0240]

[0241] In the NR protocol, SRS can be used for acquiring uplink CSI based on codebook or non-codebook transmissions, channel measurement for calculating downlink data transmission weights, and uplink beam management. SRS configured on network devices can be divided into two levels: Resource Set and Resource. Currently, multiple SRS resources within the same Resource Set are configured with the same transmit power and frequency bandwidth; that is, when a terminal device transmits multiple SRSs through multiple SRS resources in the same Resource Set, it uses the same transmit power and frequency bandwidth. After receiving multiple SRSs, the network device can perform channel estimation.

[0242] Different SRSs have the same transmission power and frequency domain resources, which leads to different signal strengths received by network devices from different SRSs, resulting in low channel estimation accuracy of SRSs.

[0243] ​In some examples, when the channel quality of ports transmitting different SRSs varies significantly, the accuracy of channel estimation measured by different SRSs will differ, resulting in lower channel estimation accuracy for the SRS. For example, a port with poor channel quality can be called a weak port, and a port with good channel quality can be called a strong port. A weak port will affect the signal quality of the SRS and reduce channel accuracy. When transmitting the same power, a strong port uses less bandwidth than a weak port, resulting in bandwidth waste and channel aging.

[0244] In view of this, embodiments of this application provide a signal transmission method and a transmission apparatus. When transmitting multiple SRSs through multiple SRS resources in the same resource set, different transmission powers and / or different frequency domain bandwidths are used. In this way, configuring different transmission powers and / or different frequency domain bandwidths for different SRSs helps to reduce the probability of different channel estimation accuracies measured by different SRSs, thereby improving the channel estimation accuracy of SRSs.

[0245] Before introducing the solutions of the embodiments of this application, the following points should be made first.

[0246] (1) In the embodiments of this application, "instruction" may include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of indicating A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A.

[0247] In this embodiment, the information indicated by the instruction information is called the information to be instructed. In specific implementations, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also indirectly indicate the information to be instructed by indicating other information, where there is a correlation between the other information and the information to be instructed. It can also indicate only a part of the information to be instructed, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various information, thereby reducing instruction overhead to some extent. Furthermore, the information to be instructed can be sent as a whole or divided into multiple sub-information units, and the sending period and / or timing of these sub-information units can be the same or different.

[0248] (2) In the embodiments of this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which may include sending directly through the air interface or sending indirectly through the air interface by other units or modules. "Receive information from YY" can be understood as the source of the information being YY, which may include receiving directly from YY through the air interface or receiving indirectly from YY through the air interface by other units or modules. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be performed between devices, such as between network devices and terminal devices, or within a device, such as sending or receiving between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.

[0249] (3) In the various embodiments of this application, unless otherwise specified or logically conflicting, the terms and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0250] (4) In the embodiments of this application, "first," "second," "#1," "#2," "#n1," "#n2," etc., are merely for descriptive convenience and are used to distinguish objects, and are not intended to limit the scope of the embodiments of this application. They are not used to describe the order or sequence of features. It should be understood that such described objects can be interchanged where appropriate so as to describe solutions other than those in the embodiments of this application.

[0251] (5) In the embodiments of this application, "predefined" can refer to a standard protocol predefined, or it can refer to a pre-agreed or pre-negotiated agreement between devices. In the embodiments of this application, "protocol" can refer to a standard protocol in the field of communication, such as the 5G protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this. "Predefined" can include predefined, such as a protocol definition. "Preconfiguration" can be implemented by pre-saving corresponding codes, tables, or other means that can be used to indicate relevant information in the device. This application does not limit the implementation method, for example.

[0252] (6) In the embodiments of this application, the words "exemplarily," "for example," etc., are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as an "example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the word "example" is intended to present the concept in a specific manner. In the embodiments of this application, "of," "corresponding, relevant," and "corresponding" may sometimes be used interchangeably, and it should be noted that their intended meanings are consistent when their distinctions are not emphasized.

[0253] The methods provided by the embodiments of this application are described in detail below with reference to the accompanying drawings. The embodiments provided by this application can be applied to the above-described... Figure 1 The communication system shown is not limited.

[0254] It should be understood that the embodiments of this application can be applied to communication scenarios of terminal-side communication devices and network-side communication devices. For example, a network-side communication device may include a network device, a CU or DU within the network device, or a module (e.g., a circuit, chip, or chip system) within the network device, or a logical node, logical module, or software capable of implementing all or part of the functions of the access network device. A terminal-side communication device may include a terminal device, a communication module within the terminal device, or a circuit or chip (e.g., a modem chip, also known as a baseband chip, or a system-on-a-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip) within the terminal device responsible for communication functions, or a logical node, logical module, or software capable of implementing all or part of the functions of the access network device. For ease of description, the following communication methods are described using network devices and terminal devices as the execution entities. When the terminal-side communication device is another node, chip, circuit, or entity, or when the network-side communication device is another node, chip, circuit, or entity, the corresponding specific implementation is similar and will not be repeated.

[0255] It should also be understood that in the following embodiments, terminal devices and network devices are used as examples for illustrative purposes. The term "terminal device" can be replaced by a component of a terminal device (e.g., a chip, chip system, or circuit), and the term "network device" can be replaced by a component of a network device (e.g., a chip, chip system, or circuit).

[0256] For example, Figure 8 A schematic flowchart illustrating a signal transmission method provided in an embodiment of this application is shown. Figure 8 As shown, the method may include the following steps:

[0257] S801, The terminal device sends a first reference signal to the network device, and correspondingly, the network device receives the first reference signal.

[0258] S802, the terminal device sends a second reference signal to the network device, and the network device receives the second reference signal accordingly. The first reference signal and the second reference signal belong to the same set of reference signal resources, and at least one of the frequency domain resources or transmission power of the first reference signal and the second reference signal is different.

[0259] In one example, the reference signal can be the SRS described above. When the reference signal is SRS, the first reference signal can also be called the first SRS, and the second reference signal can also be called the second SRS. In this embodiment, the reference signal is taken as SRS to introduce the technical solution of this embodiment. Of course, the method provided by this embodiment can also be applied to other reference signals, which will not be listed one by one in this application.

[0260] Before the terminal device sends the first SRS and the second SRS to the network device, the network device can configure one or more SRS resource sets for the terminal device. The first SRS and the second SRS can belong to the same SRS resource set. At least one of the frequency domain resources or transmission power of the first SRS and the second SRS must differ. Transmission power can refer to the transmission power in the frequency domain.

[0261] Optionally, the frequency domain resource can be the frequency domain bandwidth occupied by at least one SRS transmission; or, the frequency domain resource can be the number of frequency domain resource blocks occupied by at least one SRS transmission.

[0262] In one example, frequency domain resources can be the frequency domain bandwidth occupied by a single SRS transmission; or, frequency domain resources can be the number of frequency domain resource blocks occupied by a single SRS transmission.

[0263] Thus, there are several possible scenarios: the frequency domain resources of the first SRS and the second SRS may be different; the transmission powers of the first SRS and the second SRS may be different; or both the frequency domain resources and the transmission power of the first SRS may be different.

[0264] These three situations will be explained in detail below:

[0265] The first scenario: The frequency domain resources of the first SRS and the second SRS can be different. In this case, the first SRS and the second SRS can also satisfy one or more of the following: the first SRS and the second SRS have the same transmission power; or, the first SRS and the second SRS have different power spectral densities; or, the frequency domain resources of the first SRS and the second SRS are in a multiple relationship; or, the first SRS and the second SRS have different transmission powers; or, the first SRS and the second SRS have the same power spectral density. Here, power spectral density can be understood as the transmitted frequency domain power spectral density or the transmission power of the same frequency domain resources.

[0266] For example, the first SRS and the second SRS have different frequency domain resources, the first SRS and the second SRS have the same transmission power, and the first SRS and the second SRS have different power spectral densities.

[0267] With the same transmission power but different frequency domain resources, the power of each RB or each RE in the frequency domain differs, resulting in different frequency domain power spectral densities. This can be applied to ports with different channel qualities, improving the channel estimation accuracy of ports with poor channel quality and reducing interference from reference signals transmitted by ports with better channel quality to the reference signals of other users. For example, if the channel quality of the first SRS is worse than that of the second SRS, and the first SRS uses a larger frequency hopping bandwidth X1 while the second SRS uses a smaller frequency hopping bandwidth X2, and the time-domain transmission power Y is the same for both SRS, then the frequency domain power spectral density Y1 of the first SRS will be smaller, and the frequency domain power spectral density Y2 of the second SRS will be larger. Where X1 >= X2, Y1 <= Y2, and X2 * Y1 = X1 * Y2.

[0268] For example, the first SRS and the second SRS have different frequency domain resources, and the first SRS and the second SRS have different transmission powers.

[0269] Different frequency domain resources and different transmission powers can be applied to ports with different channel qualities. This helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0270] Optionally, the power spectral density of the first SRS and the second SRS can be the same.

[0271] The first and second SRS have different frequency domain resources, and with the same power spectral density, their transmission powers can differ. This helps improve the accuracy of function implementation, such as improving channel estimation accuracy.

[0272] For example, the frequency domain resources of the first SRS and the second SRS are different, and the frequency domain resources of the first SRS and the second SRS are in a multiple relationship.

[0273] The first and second SRS have different frequency domain resources, making them applicable to ports with different channel qualities. This helps improve the channel estimation accuracy of ports with poor channel quality and reduces the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users. The frequency domain resources of the first and second SRS are in a multiple relationship, which helps simplify the signaling indication method and the specific implementation of the terminal-side communication device.

[0274] The different frequency domain resources of the first SRS and the second SRS can be achieved through one or more of the following: the transmission combs of the first SRS and the second SRS are different, and the transmission combs are used to determine the frequency domain resources; or the frequency hopping parameters of the first SRS and the second SRS are different, and the frequency hopping parameters are used to determine the frequency domain resources; or the repetition factors of the first SRS and the second SRS are different, and the repetition factors are used to determine the frequency domain resources; or the frequency domain spread factors of the first SRS and the second SRS are different, and the repetition factors are used to determine the frequency domain resources.

[0275] For example, in method one: the frequency domain resources of the first SRS and the second SRS are different, which can be achieved through different transmission combs. For instance, the transmission comb of the first SRS can be 2, then the first SRS can be transmitted with a one-subcarrier interval between every two subcarriers. As described above. Figure 4 As shown, the frequency domain resources of the first SRS may include the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers, or the 2nd, 4th, 6th, 8th, 10th, and 12th subcarriers.

[0276] If the transmission comb of the second SRS can be 4, then the second SRS can be transmitted with a subcarrier interval of every four subcarriers. If an RB includes 12 subcarriers, then the frequency domain resources of the second SRS can include the 1st, 5th, and 9th subcarriers, or the 2nd, 6th, and 10th subcarriers, or the 3rd, 7th, and 11th subcarriers, or the 4th, 8th, and 12th subcarriers.

[0277] In this way, different transmission combs can realize different frequency domain resources, which can improve the occupancy rate of different subcarriers and help optimize spectrum utilization.

[0278] Optionally, the transfer comb can affect the sequence length of the SRS. In one example, the sequence length of the SRS can be inversely proportional to the value of the transfer comb. For example, the sequence length of the SRS can be related to the value of the transfer comb by the following formula:

[0279]

[0280] in, For the gth i The sequence length of each SRS, m SRS，b For the gth i The number of frequency domain resource blocks configured in each SRS. The number of subcarriers per resource block. For the gth i A SRS transmission comb, P F b is the configured frequency domain spread factor.

[0281] Method 2: Since the frequency domain resources of the first SRS and the second SRS are different, this can be achieved through frequency hopping parameters.

[0282] In one example, the frequency hopping parameter may include B SRS C SRS b hop One or more of the following. In embodiments of this application, the frequency hopping parameter may include B. SRS C SRS b hop This example will be used to illustrate the point; others are similar and will not be repeated here.

[0283] Through B SRS C SRS b hop Depending on the frequency domain resources available, there are multiple possible implementation methods.

[0284] In one possible implementation, the B of the first SRS and the second SRS SRS and C SRS Same, b hop Different. hop The smaller the value, the more frequency domain resources are available; correspondingly, b hop The larger the value, the fewer the frequency domain resources. This is beneficial for making the frequency domain resources of the first SRS and the second SRS different.

[0285] For example, as can be seen from Table 1 above, when C SRS =63, B SRS When = 0, if the first SRS's b hop =1, which means that the frequency domain resources of the first SRS include 16 RBs, and if the b of the second SRS is 1, then the frequency domain resources of the first SRS include 16 RBs. hop =2, which means that the frequency domain resources of the second SRS include 8RBs.

[0286] Thus, if there is one difference in the frequency hopping parameters, the implementation is simple.

[0287] In another possible implementation, the B of the first SRS and the second SRS SRS C SRS b hop There is at least one difference.

[0288] For example, the frequency domain resource is the frequency domain bandwidth occupied by a single SRS transmission. The total bandwidth of the first SRS transmission and the total bandwidth of the second SRS transmission can be the same or different. As shown in Table 1 above, if the B of the first SRS... SRS =0, C SRS =63, b hop =1, which means the total bandwidth of the first SRS transmission can be 272RB, and the bandwidth of a single first SRS transmission can be 16RB. If the bandwidth of the first SRS is 1... SRS =0, C SRS =34, b hop =1, which means that the total bandwidth of the second SRS transmission can be 136RB, and the bandwidth of a single second SRS transmission can be 4RB.

[0289] In this way, one or more different frequency hopping parameters can exist, and there is no restriction on the different parameters, which makes it more flexible.

[0290] Method 3: The frequency domain resources of the first SRS and the second SRS are different, which can be achieved through different repetition factors.

[0291] A smaller repetition factor results in fewer SRS repetitions, leading to a smaller gain for joint channel estimation at the SRS receiver, but a shorter time for the reference signal to complete full-bandwidth frequency hopping. Conversely, a larger repetition factor results in more SRS repetitions, leading to a larger gain for joint channel estimation at the SRS receiver, but a longer time for the reference signal to complete full-bandwidth frequency hopping.

[0292] In this way, different frequency domain resources can be achieved through different repetition factors. The repetition factors can be flexibly adjusted according to network requirements and channel conditions, making them more flexible.

[0293] Method 4: The first SRS and the second SRS have different frequency domain resources, which can be achieved through different frequency domain spreading factors. The frequency domain spreading factor can be a number greater than 0. It should be noted that the frequency domain spreading factor is merely an example name; it can also be called frequency weight, etc., and this application does not limit it to this specific term.

[0294] Different reference signals can be configured with different frequency domain spread factors. The unit of the frequency domain spread factor can be a linear value or a dB value. If the unit of the frequency domain spread factor is a linear value, then the frequency domain spread factor can be a multiple relationship between the frequency domain resources of each reference signal and the original frequency domain resources. A frequency domain spread factor greater than 1 indicates an increase or improvement in frequency domain resources, while a frequency domain spread factor less than 1 indicates a decrease or reduction in frequency domain resources. The original frequency domain resources can also be called reference frequency domain resources, and this application does not limit this terminology. The frequency domain spread factor can also be called frequency weighting, etc., and this application does not limit this terminology.

[0295] For example, a frequency domain spread factor of 0.5 means that half of the original frequency domain resources are used to send the reference signal corresponding to the frequency domain spread factor, and a frequency domain spread factor of 2 means that twice the original frequency domain resources are used to send the reference signal corresponding to the frequency domain spread factor.

[0296] If the unit of the frequency domain spread factor is dB, the terminal device can convert the dB value into a linear value based on a preset conversion relationship, and then calculate it based on the linear value calculation method shown above.

[0297] In this way, the frequency domain resources of the first SRS and the second SRS are different by using different frequency domain spread factors. The difference in frequency domain resources is achieved through simple calculation, which is simple.

[0298] In addition, different frequency domain spread factors can also result in different sequence lengths for the first SRS and the second SRS.

[0299] In one example, the sequence length of the SRS can be inversely proportional to the frequency domain spread factor. For instance, the sequence length of the SRS can satisfy the following formula with respect to the frequency domain spread factor:

[0300]

[0301] in, For the gth i The sequence length of each SRS, m SRS b is the gth i The number of frequency domain resource blocks configured in each SRS. The number of subcarriers for each resource block, K TC For the configured transmission comb, For the gth i Frequency domain spread factor of each SRS.

[0302] The four methods described above can also make the frequency domain resources of the first SRS and the second SRS appear to be in a multiple relationship. This will be illustrated using the frequency domain spread factor as an example, which makes the frequency domain resources of different SRS appear to be in a multiple relationship.

[0303] For example, the first SRS and the second SRS can correspond to the same frequency domain reference bandwidth X. The frequency domain spread factor of the first SRS can be 1, and the frequency domain spread factor of the second SRS can be 0.5. The frequency domain resources of the first SRS can be X, and the frequency domain resources of the second SRS can be X*0.5. The frequency domain resources of the first SRS are twice the frequency domain resources of the second SRS, or in other words, the frequency domain resources of the second SRS are half the frequency domain resources of the first SRS.

[0304] Optionally, if the frequency domain resources of the first SRS and the second SRS are different, the first SRS and the second SRS can correspond to the same SRS counter. The SRS counter is used to calculate which SRS transmission of the current time slot belongs to the terminal device, and this value is used to determine the specific frequency domain resource location occupied by the SRS transmitted in the current time slot.

[0305] Optionally, the SRS count can be related to the repetition factor of the SRS. Since the frequency domain resources of the first SRS and the second SRS are different, the repetition factors of the first SRS and the second SRS can also be different.

[0306] Optionally, the gth i The SRS count and the repeatability factor of an SRS can satisfy the following formula:

[0307]

[0308] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS Indicates the time slot period, l′ represents the symbol number. Indicates the g-th i The repeat factor of each SRS.

[0309] Optional, the gth i The SRS can refer to the g-th SRS within the same resource. i The SRS corresponding to the port, or the g-th port within the same resource set. i The SRS corresponding to the ports contained in a resource, or all ports contained in the same resource set, are uniformly sorted, and the g-th sorted port is... i The SRS corresponding to each port; wherein, the sorting method can be any of the following: sorting based on resource index / identification between different resources, sorting based on port index within a resource, and the sorting criterion can be from index value to small or from small to large.

[0310] Optional, the gth i Each SRS can correspond to either the first SRS or the second SRS.

[0311] The second scenario: The first SRS and the second SRS have different transmission powers, and the first SRS and the second SRS also satisfy one or more of the following: The first SRS and the second SRS have the same frequency domain resources; or, the first SRS and the second SRS have different frequency domain resources; or, the first SRS and the second SRS have different power spectral densities; or, the first SRS and the second SRS have the same power spectral density; or, the transmission powers of the first SRS and the second SRS are in a multiple relationship.

[0312] For example, the first SRS and the second SRS have different transmission powers, the first SRS and the second SRS have the same frequency domain resources, and the first SRS and the second SRS have different power spectral densities.

[0313] With different transmission power but the same frequency domain resources, the power of each RB or each RE in the frequency domain is different, resulting in different frequency domain power spectral densities. This can be applied to ports with different channel qualities, which is beneficial for improving the channel estimation accuracy of ports with poor channel quality and reducing the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0314] For example, the first SRS and the second SRS have different transmission powers and different frequency domain resources.

[0315] Different frequency domain resources and different transmission powers can be applied to ports with different channel qualities. This helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of reference signals transmitted by ports with better channel quality on the reference signals of other users.

[0316] Optionally, the power spectral density of the first SRS and the second SRS can be the same.

[0317] The first and second SRS have different frequency domain resources, and with the same power spectral density, their transmission powers can differ. This helps improve the accuracy of function implementation, such as improving channel estimation accuracy.

[0318] For example, the transmission power of the first SRS and the second SRS are different, and the transmission power of the first SRS and the second SRS can be in a multiple relationship.

[0319] The first and second SRS have different transmit powers, making them applicable to ports with varying channel quality. This improves channel estimation accuracy for ports with poor channel quality and reduces interference from reference signals transmitted by ports with better channel quality to other users' reference signals. The transmit powers of the first and second SRS are proportional, simplifying implementation.

[0320] The difference in transmission power between the first SRS and the second SRS can be achieved through one or more of the following: the power spreading factors of the first SRS and the second SRS are different, and the power spreading factors are used to determine the transmission power; or, the transmission power offsets of the first SRS and the second SRS are different, and the transmission power offsets are used to determine the transmission power; or, the downlink path loss estimates of the first SRS and the second SRS are different, and the downlink path loss estimates are used to determine the transmission power; or, the frequency domain resources of the first SRS and the second SRS are different, and the frequency domain resources are used to determine the transmission power.

[0321] For example, in method one: the transmission power of the first SRS and the second SRS are different, which can be achieved by different power spreading factors.

[0322] Different SRSs can be configured with different power spreading factors. The unit of the power spreading factor can be a linear value or a dB value. If the unit of the power spreading factor is a linear value, then the power spreading factor can be a multiple of the transmitted power of each reference signal superimposed on the original transmitted power. A power spreading factor greater than 1 indicates an increase in transmitted power, while a power spreading factor less than 1 indicates a decrease in transmitted power. The original transmitted power can also be called the reference transmit power, which is not limited in this application. The power spreading factor can also be called power weight, etc., which is not limited in this application.

[0323] For example, a power spread factor of 0.5 means that the reference signal corresponding to the power spread factor is transmitted at half the original power, and a power spread factor of 2 means that the reference signal corresponding to the power spread factor is transmitted at twice the original power.

[0324] The power spread factor is measured in dB. It can be the power value that is added to the original transmission power of each reference signal.

[0325] For example, a power spread factor of 10 means that the reference signal corresponding to the power spread factor is transmitted with a power increase of 10dB from the original power, and a power spread factor of -5 means that the reference signal corresponding to the power spread factor is transmitted with a power decrease of 5dB from the original power.

[0326] Optionally, different reference signals can be associated with different power spreading factors. If the terminal device determines the total transmission power of the first reference signal and the second reference signal as X, then the original transmission power corresponding to the first reference signal and the second reference signal can be X / 2. In this case, the terminal device can determine the final transmission power of the reference signal for different power spreading factors.

[0327] For example, when the unit of the original transmit power of the terminal-side communication device differs from the unit of the power spread factor, both need to be converted to the same unit before calculating the actual transmit power. If the power spread factor is a dB value and the unit of the original transmit power X / 2 is also dB, and the power spread factor corresponding to the first reference signal is 0.5, then the actual transmit power of the first reference signal can be 0.5 + X / 2; if the power spread factor corresponding to the second reference signal is 2, then the actual transmit power of the second reference signal can be 2 + X / 2; the actual total transmit power of the first and second reference signals can be X + 2.5.

[0328] If the power spread factor is linear and the original transmission power X / 2 is also linear, and the power spread factor corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5*X / 2; if the power spread factor corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2*X / 2; the actual total transmission power of the first and second reference signals can be X / 4+X=5X / 4.

[0329] If the power spread factor is linear and the original transmission power X / 2 is in dB, the power spread factor corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the power spread factor corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; the actual total transmission power of the first and second reference signals is in dB, and the value is X+10*log10(0.5)+10*log10(2).

[0330] Optionally, if the actual total transmission power of the first SRS and the second SRS is greater than the maximum transmission power of the terminal device, the actual transmission power of the first SRS and the second SRS is rolled back to ensure that the actual total transmission power of the first SRS and the second SRS does not exceed the maximum transmission power of the terminal device.

[0331] In this way, the transmission of the first SRS and the second SRS can be different by using different power spread factors, and the power resources can be different by simple calculation, which is simple.

[0332] Method 2: The first SRS and the second SRS have different transmission powers, which can be achieved by using different transmission power offsets.

[0333] Different SRSs can be configured with different transmit power offsets. The transmit power offset can be the difference between the transmit power of each SRS and the reference power, or it can be the difference between the transmit power of each SRS and the transmit power of a certain SRS, or it can be the difference between the transmit power of each SRS and the transmit power of the previous SRS when the SRSs are sorted.

[0334] Optionally, different SRSs are associated with different transmission power offsets. The terminal device determines the total transmission power of the first reference signal and the second reference signal as X. Then, the original transmission power corresponding to the first reference signal and the second reference signal can be X / 2. At this time, the terminal device can determine the final transmission power of the reference signal for different transmission power offsets.

[0335] For example, the unit of the transmission power offset can be a linear value or a dB value. When the unit of the transmission power of the terminal-side communication device is different from the unit of the transmission power offset, they need to be converted to the same unit before calculating the actual transmission power. If the transmission power offset is a dB value and the unit of the original transmission power X / 2 is also dB, and the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5 + X / 2; if the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2 + X / 2; the actual total transmission power of the first and second reference signals can be X + 2.5.

[0336] If the transmission power offset is a linear value and the original transmission power X / 2 is also a linear value, the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 0.5*X / 2; the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 2*X / 2; the actual total transmission power of the first and second reference signals can be X / 4+X=5X / 4; if the transmission power offset is a linear value and the original transmission power X / 2 is a dB value, the transmission power offset corresponding to the first reference signal is 0.5, then the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the transmission power offset corresponding to the second reference signal is 2, then the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; the actual total transmission power of the first and second reference signals is in dB, and the value is X+10*log10(0.5)+10*log10(2);

[0337] Optionally, if the actual total transmission power of the first reference signal and the second reference signal is greater than the maximum transmission power of the terminal device, the actual transmission power of the first reference signal and the second reference signal is backed up to ensure that the actual total transmission power of the first reference signal and the second reference signal does not exceed the maximum transmission power of the terminal device.

[0338] Furthermore, the different transmission powers of the first and second reference signals can also be achieved using a power spreading factor and a transmission power offset. In this case, the power spreading factor can be a linear value, and the transmission power offset can also be a linear value; alternatively, the power spreading factor can be a dB value, and the transmission power offset can also be a dB value; alternatively, the power spreading factor can be a linear value, and the transmission power offset can also be a dB value; alternatively, the power spreading factor can be a dB value, and the transmission power offset can also be a linear value. For specific implementation details, please refer to the examples above, which will not be elaborated upon here.

[0339] In one example, the transmit power of the SRS and the transmit power offset can satisfy the following formula:

[0340]

[0341] Where b represents the active uplink bandwidth, f represents the carrier, c represents the serving cell, and q represents the serving cell. s Denotes the SRS resource set, q d The SRS resource index is used to calculate the downlink path loss estimate, l represents the SRS power control adjustment status index, and P represents the SRS resource index used to calculate the downlink path loss estimate. SRS，b，f，c (i, q) s l) represents the serving cell c, carrier f, active uplink bandwidth b, SRS power control adjustment status index l, and SRS resource set q determined by the terminal device. s The transmission power of SRS at the i-th transmission timing, M SRS，b，f，c (i) represents the frequency domain resources occupied by the SRS during the i-th transmission, PL b，f，c (q d The terminal device determines the serving cell c, carrier f, active uplink bandwidth b, and SRS resource index q. d The calculated downlink path loss estimate for SRS, Indicates the g-th i The transmit power offset of the g-th SRS, where G represents the power offset used to transmit the g-th SRS. i The number of antenna ports of each SRS, P CMAX，f，c (i) represents the maximum frequency domain transmit power configured for serving cell c and carrier f during the i-th SRS transmission opportunity, P O_SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and SRS resource set q.s p0 provides α SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and SRS resource set q. s The alpha provided in the middle, and h b，f，c (i, l) represents the power adjustment value of serving cell c, carrier f at the i-th transmission time of SRS, based on SRS power control adjustment state index l. μ is related to the subcarrier spacing and has a corresponding relationship with the subcarrier spacing. For example, when the subcarrier spacing is 15kHz, μ is 0; when the subcarrier spacing is 15kHz, μ is 1.

[0342] Method 3: The transmission power of the first SRS and the second SRS are different, which can be achieved by using different downlink path loss estimates.

[0343] Different SRSs are associated with the same or different path loss SRSs. Different downlink path loss estimates are estimated based on the path loss SRSs. Based on the downlink path loss estimates, different transmission powers are determined for different SRSs. This is applicable to ports with different channel qualities, which helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of SRSs transmitted by ports with better channel quality to the SRSs of other users.

[0344] Optionally, a first port with stronger channel quality corresponds to a smaller path loss estimate. Based on this smaller path loss estimate, the terminal device determines a lower transmit power to transmit the first SRS corresponding to the first port with stronger channel quality. This helps reduce interference from the first SRS of the first port with stronger channel quality to the SRS of other users. Conversely, a second port with weaker channel quality corresponds to a larger path loss estimate. Based on this larger path loss estimate, the terminal device determines a higher transmit power to transmit the second SRS corresponding to the second port with weaker channel quality. This helps improve the channel estimation accuracy of the second SRS of the second port with weaker channel quality.

[0345] The first SRS and the second SRS have different transmission powers, which can be achieved using different frequency domain resources. Transmission power can be related to frequency domain resources; different transmission powers can be obtained by setting different frequency domain resources.

[0346] Optionally, different SRSs can be associated with different frequency domain resources. The terminal device determines the transmission power for different SRSs based on the frequency domain resources. This can be applied to ports with different channel qualities, which helps to improve the channel estimation accuracy of ports with poor channel quality and reduce the interference of SRSs transmitted by ports with good channel quality to the SRSs of other users.

[0347] Optionally, the first SRS of the first port with stronger channel quality corresponds to larger frequency domain resources, while the first SRS of the second port with weaker channel quality corresponds to smaller frequency domain resources; the frequency domain resources can be frequency domain bandwidth, the number of frequency domain resource blocks, or the number of frequency domain resource elements. The terminal device determines the first transmit power based on the frequency domain resources of the first SRS, determines the second transmit power based on the frequency domain resources of the second reference signal, and then determines the second transmit power based on the first transmit power, the second transmit power, and the terminal device's maximum transmit power P. CMAX，f，c (i) Determine the third transmit power. Both the first SRS and the second SRS use the third transmit power. Since the frequency domain resources of the first SRS are greater than those of the second SRS, at the same transmit power, the frequency domain power spectral density of the first SRS is less than that of the second SRS. This is beneficial for improving the channel estimation accuracy of the second port with weaker channel quality and reducing the interference of the SRS transmitted by the first port with stronger channel quality to the SRS of other users.

[0348] In one example, the SRS transmit power and downlink path loss estimate satisfy at least one of the following formulas:

[0349]

[0350] or,

[0351]

[0352] or,

[0353]

[0354] Where b represents the active uplink bandwidth, f represents the carrier, c represents the serving cell, and q represents the serving cell. s Denotes the SRS resource set, q d The SRS resource index is used to calculate the downlink path loss estimate, l represents the SRS power control adjustment status index, and P represents the SRS resource index used to calculate the downlink path loss estimate. SRS，b，f，c (i, q) s l) represents the serving cell c, carrier f, active uplink bandwidth b, SRS power control adjustment status index l, and SRS resource set q determined by the terminal device. s The transmission power of SRS at the i-th transmission timing, M SRS，b，f，c (i) represents the frequency domain resources occupied by the SRS during the i-th transmission, M SRS，b，f，c (i, g) i ) represents the frequency domain resources occupied by the gi-th SRS during the i-th transmission, PL b，f，c (q d g iThe following represents the serving cell c, carrier f, active uplink bandwidth b, and SRS resource index q determined by the terminal device. d The calculated downlink path loss estimate for the gi-th SRS, P CMAX，f，c (i) represents the maximum frequency domain transmit power configured for serving cell c and carrier f during the i-th SRS transmission opportunity, P O_SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and SRS resource set q. s p0 provides α SRS，b，f，c (q s () represents the serving cell c, carrier f, active uplink bandwidth b, and SRS resource set q. s The alpha provided in the middle, and h b，f，c (i, l) represents the power adjustment value of serving cell c, carrier f at the i-th transmission time of SRS, based on SRS power control adjustment state index l.

[0355] Different SRSs can be configured with different downlink path loss estimates, which are applicable to ports with different channel qualities. This helps to reduce the probability that the channel estimation accuracy measured by different SRSs will be different.

[0356] Method 4: The first SRS and the second SRS have different transmission powers, which can be achieved through different frequency domain resources.

[0357] In one example, the SRS transmit power and frequency domain resources satisfy at least one of the following formulas:

[0358]

[0359] or,

[0360]

[0361] or,

[0362]

[0363] Among them, M SRS，b，f，c (i, g) i ) represents the frequency domain resources occupied by the gi-th SRS during the i-th transmission, PL b，f，c (q d The terminal device determines the serving cell c, carrier f, active uplink bandwidth b, and SRS resource index q. d The calculated downlink path loss estimate for SRS.

[0364] Transmission power can be related to frequency domain resources; different transmission powers can be obtained by setting different frequency domain resources.

[0365] Method 5: The transmission power of the first SRS and the second SRS are different, which can be achieved through downlink path loss estimation and frequency domain resources.

[0366] In one example, the SRS transmit power, downlink path loss estimate, and frequency domain resources satisfy at least one of the following formulas:

[0367]

[0368] or,

[0369]

[0370]

[0371] or,

[0372]

[0373] S803, The network device acquires the first channel of the first reference signal and the second channel of the second reference signal.

[0374] Network devices can estimate a first reference signal to obtain a first channel of the first reference signal, and can estimate a second reference signal to obtain a second channel of the second reference channel. In some examples, the first channel can also be referred to as a first channel matrix, and the second channel can also be referred to as a second channel matrix.

[0375] For example, the terminal device has 4 antennas, and the network device has 128 antennas. At a first moment, the terminal device uses 2 of its 4 antennas to transmit a first reference signal. At a second moment, the terminal device uses the remaining 2 of its 4 antennas to transmit a second reference signal. The second moment can occur after the first moment. The network device can estimate the first reference signal to obtain a 128*2 channel H1, or a 128*2 channel matrix H1. The network device can also estimate the second reference signal to obtain a 128*2 channel H2, or a 128*2 channel matrix H2.

[0376] S804: The network device combines the first and second channels to obtain the third channel.

[0377] The network device obtains a first channel (H1) based on a first reference signal and a second channel (H2) based on a second reference signal. The network device needs to combine the first and second channels to obtain channel estimates under multiple reference signal combinations on the terminal side, thereby guiding the calculation of transmission weights for downlink transmission.

[0378] Network devices combine the first and second channels to obtain a third channel, which can include a variety of possible implementation methods.

[0379] In one possible implementation, the first reference signal and the second reference signal have the same transmission power or the same frequency domain power spectral density. The network device obtains a first channel H1 based on the first reference signal and a second channel H2 based on the second reference signal. When the network device combines the first channel and the second channel, it can directly combine them to obtain a third channel H, which can be expressed as: H = [H1 H2].

[0380] In another possible implementation, the first reference signal and the second reference signal have different transmission powers or different frequency domain power spectral densities. The network device obtains a first channel H1 based on the first reference signal and a second channel H2 based on the second reference signal. When combining the first channel and the second channel, the network device first needs to adjust the first channel and the second channel based on the difference in transmission power or the difference in frequency domain power spectral density between the first and second reference signals to align the transmission power or power spectral density of the reference signals corresponding to the first channel and the second channel. Then, the adjusted first channel and the second channel are combined to obtain the third channel.

[0381] For example, if the transmission power or frequency domain power spectral density of the first reference signal is 0.5X, and the transmission power or frequency domain power spectral density of the second reference signal is X, when the terminal device performs power spectral density alignment, one method is that the terminal device can use the transmission power or frequency domain power spectral density of the first reference signal as a reference to adjust the second channel H2 of the second reference signal. The adjusted second channel H2' = 0.5 * H2. The adjusted channels are then combined to obtain the third channel H = [H1H2']. Another method is that the terminal device can use the transmission power or frequency domain power spectral density of the second reference signal as a reference to adjust the first channel H1 of the first reference signal. The adjusted second channel H1' = 2 * H2. The adjusted channels are then combined to obtain the third channel H = [H1'H2].

[0382] In this scenario, the network devices have N ports, the terminal devices have 2 ports, and the ports of the terminal devices correspond to the first port and the second port, respectively. A first reference signal is transmitted based on the first port, and a second reference signal is transmitted based on the second port. The first channel H1∈C is obtained based on the first reference signal. N×1 The first channel H2∈C is obtained based on the first reference signal. N×1 The combined third channel H∈C N×2The signal transmission method provided in this application embodiment is beneficial for improving the channel estimation accuracy of reference signals in scenarios where the frequency domain resources or transmission power of different reference signals are different in the same set of reference signal resources.

[0383] The above method describes in detail the characteristics of the time-frequency resources of the reference signal. The characteristics of the time-domain resources of the reference signal will be introduced below.

[0384] In one possible implementation, the first reference signal and the second reference signal can occupy the same time-domain resources. Alternatively, the first reference signal and the second reference signal can occupy the same symbol in the same time slot. Furthermore, the first reference signal and the second reference signal have the same time-domain resources.

[0385] This allows for more efficient use of limited time-domain resources and reduces the probability of resource waste.

[0386] Optionally, the first reference signal and the second reference signal may correspond to different reference signal resources in the same set of reference signal resources. In other words, the first reference signal and the second reference signal may occupy different RBs in the same set of resources.

[0387] Thus, the first reference signal and the second reference signal correspond to different reference signal resources. Optionally, at least one of the following parameters configured for at least two reference signal resources within the same set of reference signal resources may be different: the frequency hopping parameter of the reference signal, the frequency domain resource of the reference signal, the transmit power of the reference signal, the transmit power offset of the reference signal, the repetition factor of the reference signal, the power spectral density of the reference signal, the transmission comb of the reference signal, the frequency domain spread factor of the reference signal, the power spread factor of the reference signal, or the downlink path loss estimate of the reference signal.

[0388] Optionally, the first reference signal may correspond to a first reference signal resource, and the second reference signal may correspond to a second reference signal resource. The first and second reference signal resources belong to the same set of reference signal resources. The first and second reference signal resources may satisfy one or more of the following: the index values ​​of the first and second reference signal resources are adjacent in the same set of reference signal resources; or, the first and second reference signal resources include the same number of ports; or, the first and second reference signal resources are any two reference signal resources in the same set of reference signal resources; or, the first and second reference signal resources include different numbers of ports.

[0389] For example, if the terminal device supports x ports that can transmit simultaneously uplink and y ports that can receive simultaneously downlink, then for the SRS information configuration of antenna switching, the y ports are divided into k groups. Ports in the same group can belong to the same reference signal resource or different reference signal resources. Different reference signal resources can include different numbers of ports or the same number of ports.

[0390] In one possible implementation, the first reference signal may correspond to a first reference signal resource, the second reference signal may correspond to a second reference signal resource, and the first reference signal resource and the second reference signal resource may have adjacent index values ​​in the same set of reference signal resources.

[0391] For example, within the same set of reference signal resources, one or more reference signal resources occupying the same symbol, different symbols, adjacent symbols, or non-adjacent symbols can be defaulted to or configured. For instance, a first reference signal and a second reference signal can implement antenna switching functionality. The same set of reference signal resources may include three reference signal resources: a first reference signal resource includes a first port configuration, used to transmit a first reference signal; a second reference signal resource with an index value adjacent to the first reference signal resource index value, which can be used to transmit a second reference signal using the same time-domain resource as the first reference signal; and a third reference signal resource with an index value not adjacent to the first reference signal resource index value, which can be used to transmit a third reference signal using a different time-domain resource than the first reference signal. The time-domain resources of the reference signal transmitted by the third reference signal resource and the reference signal transmitted by the second reference signal resource may be the same or different; this embodiment does not limit this. Furthermore, different time-domain resources may be different time slots or different symbols in the same time slot. In another possible implementation, multiple reference signal resources within the same set of reference signal resources include the same number of ports.

[0392] For example, the terminal device is a 2T4R type, supporting uplink simultaneous transmission from 2 ports and downlink simultaneous reception from 4 ports. The terminal device completes SRS transmission from all 4 ports through antenna switching. In this case, the same reference signal resource set can include 4 reference signal resources, namely the first reference signal resource, the second reference signal resource, the third reference signal resource, and the fourth reference signal resource, and each reference signal resource contains one port. In one case, the first reference signal corresponds to the first reference signal resource, and the second reference signal corresponds to the second reference signal resource. Considering that the terminal device has the ability to transmit signals from 2 ports simultaneously uplink, the first reference signal and the second reference signal can occupy the same time domain resources, which can also be understood as occupying the same symbol in the same time slot; the frequency domain resources may be the same or different. In another case, the first reference signal corresponds to the first reference signal resource, and the second reference signal corresponds to the third reference signal resource. The first reference signal and the second reference signal need to be transmitted through antenna switching. In this case, the first reference signal and the second reference signal can occupy different time domain resources, which can also be understood as occupying different time slots or different symbols.

[0393] In another possible implementation, at least two reference signal resources within the same set of reference signal resources have different numbers of ports.

[0394] For example, the terminal device is a 2T4R type, supporting uplink simultaneous transmission from 2 ports and downlink simultaneous reception from 4 ports. The terminal device completes SRS transmission from all 4 ports through antenna switching. In this case, the same set of reference signal resources can include 3 reference signal resources: a first reference signal resource, a second reference signal resource, and a third reference signal resource. The first reference signal resource includes 1 port, the second reference signal resource includes 2 ports, and the third reference signal resource includes 1 port. In one scenario, the first reference signal resource includes a first port, which can be used to transmit a first reference signal; the third reference signal resource includes a second port, which can be used to transmit a second reference signal; the first and second reference signals can occupy the same time-domain resources; the second reference signal resource includes a third port and a fourth port, which can be used to transmit the third and fourth reference signals; the time-domain resources occupied by the third and fourth reference signals can be different from those occupied by the first and second reference signals. In another scenario, the first reference signal resource includes a first port, which can be used to transmit a first reference signal. The second reference signal resource includes a second port and a third port, where the second port can be used to transmit a second reference signal, and the third port can be used to transmit a third reference signal. The time-domain resources occupied by the third and second reference signals may differ from those occupied by the first reference signal. The third reference signal resource includes a fourth port, which can be used to transmit a fourth reference signal, which may occupy the same time-domain resources as the first reference signal.

[0395] Optionally, the terminal device can send a first reference signal and a second reference signal to the network device through different ports. For example, the terminal device can send the first reference signal to the network device through a first port and the second reference signal to the network device through a second port. It is understood that the port can also be called an antenna port, a reference signal port, or a pilot port, and this application embodiment does not limit it in this way.

[0396] For example, in the above Figure 3 In the example shown, the terminal device is a 2T4R, supporting two uplink ports for simultaneous transmission and four downlink ports for simultaneous reception. The terminal device completes SRS transmission across all four ports through antenna switching. The first port can be either antenna port 1 or antenna port 2, and the first reference signal can be the SRS signal transmitted from the first port. The second port can be either antenna port 3 or antenna port 4, and the second reference signal can be the SRS signal transmitted from the second port.

[0397] In this way, reference signals transmitted through different ports can correspond to different frequency domain resources and / or different transmission powers. When the channel quality varies at different ports, this is beneficial to improving the channel estimation accuracy of the reference signal.

[0398] In one example, the different ports mentioned above may belong to different reference signal resources. In other words, the same set of reference signal resources includes multiple reference signal resources, and each of the multiple reference signal resources may include one or more ports. The port that transmits the first reference signal and the port that transmits the second reference signal may belong to different reference signal resources.

[0399] In one example, the different ports mentioned above can belong to different groups. In other words, the terminal device can include multiple ports, which can be divided into multiple groups, each group including one or more ports, and the port that transmits the first reference signal and the port that transmits the second reference signal can belong to different groups.

[0400] For example, in the above Figure 3 In the example shown, the terminal device may include four antenna ports, which may be divided into two groups. The first group may include antenna port 1 and antenna port 2, and the second group may include antenna port 3 and antenna port 4. The ports that transmit the first reference signal may include antenna port 1 and antenna port 2, and the ports that transmit the second reference signal may include antenna port 3 and antenna port 4. Ports that transmit different reference signals may belong to different groups.

[0401] In this way, different ports are grouped together, with ports in the same group corresponding to the same frequency domain resources and transmission power, and ports in different port groups corresponding to different frequency domain resources and / or different transmission powers. This approach helps to reduce complexity compared to different ports corresponding to different frequency domain resources and / or different transmission powers.

[0402] Optionally, the channel quality differences between ports in different groups are relatively large, while the channel quality differences between ports in the same port group are relatively small. In other words, multiple ports can be grouped based on channel quality. Port groups with poor channel quality can be called weak port groups, relatively weak port groups, very weak port groups, etc., while port groups with good channel quality can be called strong port groups, relatively strong port groups, very strong port groups, etc. The specific number of groups can be 2, 3, 4, 5, etc., and this application embodiment does not limit this.

[0403] In this way, the channel quality of the first port and the second port can be different. With different channel quality, the reference signals transmitted by the first port and the second port can utilize different frequency domain resources and / or different transmission powers. This helps improve the channel estimation accuracy of the port with poorer channel quality and reduces the interference of the reference signal transmitted by the port with better channel quality on the reference signals of other users.

[0404] Ports in the same group can belong to the same reference signal resource within the same reference signal resource set, while ports in different groups can belong to different reference signal resources within the same reference signal resource set. Ports in the same group can transmit reference signals with the same frequency domain resources and transmission power, while ports in different groups can have one of these differences.

[0405] This allows for several possible scenarios: First, ports within the same group may transmit reference signals with identical frequency domain resources and transmission power. Second, ports in different groups may transmit reference signals with different frequency domain resources but identical transmission power. Third, ports within the same group may transmit reference signals with identical frequency domain resources but different transmission power. Fourth, ports within the same group may transmit reference signals with identical frequency domain resources and transmission power. Fifth, ports in different groups may transmit reference signals with different frequency domain resources and different transmission power.

[0406] The following section uses SRS as an example to explain these three cases in detail:

[0407] In one possible implementation, ports in the same group can have the same frequency domain resources and transmission power for SRS, while ports in different groups can have different frequency domain resources for SRS, but the same transmission power.

[0408] The frequency domain resources of SRS transmitted by ports of different groups are different, which can be achieved by one or more of the following: transmission comb, frequency hopping parameters, repetition factor, or frequency domain spread factor.

[0409] In one example, ports in different groups transmit SRS with different frequency domain resources, which can be achieved by configuring different frequency domain spreading factors for ports in different groups. Weaker ports can be configured with smaller frequency domain spreading factors, while stronger ports can be configured with larger frequency domain spreading factors.

[0410] For example, each group of ports can be configured with reference frequency domain resources and a frequency domain spreading factor. The product of the frequency domain spreading factor and the reference frequency domain resources represents the frequency domain resources for each group of ports. For instance, the default frequency domain spreading factor for the first group of ports is 1. Network devices can send reference frequency domain resources to terminal devices via the higher-layer parameter "b-SRS" configured in RRC, and also send the frequency domain spreading factors for ports in other groups. Terminal devices can determine the frequency domain resources for each group of ports using the reference frequency domain resources and the frequency domain spreading factor. Since the frequency domain spreading factors are different for each group of ports, the frequency domain resources of the SRS sent by each group of ports are different. Weak port groups can be configured with smaller frequency domain spreading factors, while strong port groups can be configured with larger frequency domain spreading factors. Thus, based on the default first group of ports, it is not necessary to configure a frequency domain spreading factor for each group of ports, simplifying signaling.

[0411] For example, network devices can send reference frequency domain resources and frequency domain spreading factors for each group of ports to terminal devices via the higher-layer parameter "b-SRS" configured in RRC. Terminal devices can then determine the frequency domain resources for each group's ports using the reference frequency domain resources and frequency domain spreading factors. Since the frequency domain spreading factors differ for each group's ports, the frequency domain resources sent by each group's ports will also differ. Weak port groups can be configured with smaller frequency domain spreading factors, while strong port groups can be configured with larger ones. This allows for configuring frequency domain spreading factors for each port group, providing greater flexibility.

[0412] Furthermore, configuring different frequency domain spread factors for ports in different groups can also affect the length of the SRS sequence transmitted by ports in different groups. The length of the SRS sequence transmitted by ports in each group can satisfy the following formula:

[0413] In another example, the frequency domain resources of the SRS transmitted by ports in different groups are different, which can be achieved through frequency hopping parameters. Frequency hopping parameters can include B. SRS C SRS b hop One or more of them.

[0414] For example, network devices can configure the same B for ports of each group of terminal devices. SRS C SRS The total bandwidth of SRS transmitted on each group's port is the same. Network devices can also configure different bandwidths for each group's ports on the terminal devices. hop The bandwidth of a single SRS transmission varies for each group's port. hopThe value of b can be inversely proportional to the bandwidth of a single SRS transmission. hop The smaller the value, the larger the bandwidth of a single SRS transmission; correspondingly, b hop The larger the value, the smaller the bandwidth of a single SRS transmission. For example, as shown in Table 1 above, C... SRS =63, B SRS =0, the first group of ports configured with b hopping =1 indicates that the bandwidth of a single SRS transmission is 16RB, and the second group of ports is configured with b. hopping =2 indicates that the bandwidth of a single SRS transmission is 8RB.

[0415] For example, network devices can configure a set of frequency hopping parameters B for each group of ports of terminal devices. SRS C SRS b hop The total bandwidth of SRS sent by ports in each group can be the same or different, and the bandwidth of a single SRS sent by ports in each group is different. For example, as shown in Table 1 above, the first group of ports is configured with C... SRS =63, B SRS =0, b hopping =1 indicates that the total SRS transmission bandwidth of the first group of ports is 272RB, and the bandwidth of a single SRS transmission is 16RB. The second group of ports is configured with C. SRS =34, B SRS =0, b hopping =1 indicates that the total SRS transmission bandwidth of the second group of ports is 136RB, and the bandwidth of a single SRS transmission is 4RB.

[0416] In another example, the frequency domain resources of SRS transmitted by ports in different groups are different, which can be achieved by configuring different repetition factors for ports in different groups. Among them, weaker ports can be configured with larger repetition factors, which is beneficial to improving the accuracy of SRS channel estimation, while stronger ports can be configured with smaller repetition factors, which is beneficial to shortening the time requirement for full bandwidth transmission of SRS.

[0417] In addition, configuring different repetition factors for ports in different groups can affect the SRS counters sent by ports in different groups, resulting in different SRS counters sent by ports in different groups.

[0418] For example, the SRS counters transmitted by ports in different groups and the repetition factors of ports in different groups can satisfy the following formula:

[0419]

[0420] in, n represents the number of time slots within a system frame. f Indicates the system frame number. T represents the slot number within a system frame. offset T represents the time slot offset value. SRS Indicates the time slot period, l′ represents the symbol number. Indicates the g-th i The repetition factor of SRS sent by the ports of each group.

[0421] In another possible implementation, ports in the same group can transmit SRS with the same frequency domain resources and transmission power, while ports in different groups can transmit SRS with the same frequency domain resources but different transmission powers.

[0422] In one example, the SRS transmission power of ports in different groups varies, which can be achieved by configuring different power spreading factors for ports in different groups. Weaker ports can be configured with larger power spreading factors, while stronger ports can be configured with smaller power spreading factors.

[0423] For example, each group of ports can be configured with a reference transmit power and a power spreading factor. The product of the power spreading factor and the reference transmit power represents the transmit power of each group's ports. For instance, the default power spreading factor for the first group's ports is 1. The network device can send the reference transmit power to the terminal device via the higher-layer parameter "b-SRS" configured in the RRC, and also send the power spreading factors for ports in other groups. The terminal device can determine the transmit power of each group's ports using the reference transmit power and the power spreading factor. Since the power spreading factors are different for each group's ports, the transmit power of the SRS sent by each group's ports will be different. Weak port groups can be configured with larger power spreading factors, while strong port groups can be configured with smaller power spreading factors. Thus, based on the default first group's ports, it is not necessary to configure a power spreading factor for each group's ports, simplifying signaling.

[0424] For example, network devices can send reference transmit power and power spreading factors for each group of ports to terminal devices via the higher-layer parameter "b-SRS" configured in RRC. Terminal devices can determine the transmit power of each group's ports using the reference transmit power and power spreading factors. Since the power spreading factors differ for each group's ports, the transmit power of the SRS sent by each group's ports will also differ. Weaker port groups can be configured with larger power spreading factors, while stronger port groups can be configured with smaller power spreading factors. This allows for configuring power spreading factors for each port group, providing greater flexibility.

[0425] The reference transmission power can satisfy the following formula:

[0426]

[0427] In another possible implementation, ports in the same group can have the same frequency domain resources and transmission power for SRS, while ports in different groups can have different frequency domain resources and transmission power for SRS.

[0428] The implementation methods for different frequency domain resources and transmission power of SRS transmitted by ports of different groups can be referred to the above examples, and will not be repeated here.

[0429] In the method described above, at least one of the frequency domain resources and transmission power of the SRS transmitted by ports in different groups is different. Furthermore, ports in different groups can correspond to different SRS resources, while ports in the same group can correspond to the same SRS resources.

[0430] In addition, ports in different groups can occupy the same time-domain resources if one or more of the following conditions are met: the index values ​​of the SRS resources corresponding to ports in different groups are adjacent in the same resource set, or the number of ports included in the SRS resources corresponding to ports in different groups is the same.

[0431] For example, ports in different groups can occupy the same time-domain resources provided that their corresponding SRS resources have adjacent index values ​​in the same resource set. In the above... Figure 3 In the example shown, the four downlink antenna ports of the terminal device can be divided into three groups, namely the first group, the second group, and the third group. The first group may include antenna port 1, corresponding to the first SRS resource in the SRS resource set. The second group may include antenna port 2, corresponding to the second SRS resource in the SRS resource set. The third group may include antenna ports 3 and 4, corresponding to the third SRS resource in the SRS resource set. If the first and second SRS resources have adjacent index values ​​in the same SRS resource set, then the ports included in the first and second SRS resources can occupy the same time-domain resources; that is, the SRS transmitted by antenna port 1 and antenna port 2 can occupy the same time-domain resources. If the third SRS resource is not adjacent to either the second or first SRS resource, then the ports included in the third and second SRS resources can occupy different time-domain resources; that is, different time slots or different symbols in the same time slot.

[0432] For example, ports in different groups can occupy the same time-domain resources provided that the corresponding SRS resources include the same number of ports. In the above... Figure 3In the example shown, the four downlink antenna ports of the terminal device can be divided into three groups, namely the first group, the second group, and the third group. The first group can include antenna port 1, corresponding to the first SRS resource in the SRS resource set. The second group can include antenna port 2, corresponding to the second SRS resource in the SRS resource set. The third group can include antenna ports 3 and 4, corresponding to the third SRS resource in the SRS resource set. Since the first and second SRS resources both include one port, the ports included in the first and second SRS resources can occupy the same time-domain resources. That is, the SRS transmitted by antenna port 1 and antenna port 2 can occupy the same time-domain resources.

[0433] SRS can implement functions such as antenna switching, codebook switching, non-codebook switching, and beam management. When SRS implements antenna switching, the number of ports that the terminal device can use simultaneously when transmitting uplink signals can be x, and the number of ports that can be used simultaneously when receiving downlink signals can be y. The y ports can be divided into k1 groups. Ports in different groups of these k groups can occupy the same time-domain resources if one or more of the following conditions are met: the index values ​​of the SRS resources corresponding to ports in different groups are adjacent in the same resource set, or the number of ports included in the SRS resources corresponding to ports in different groups is the same.

[0434] When SRS implements either codebook or non-codebook functionality, the number of ports that a terminal device can use simultaneously when sending uplink signals can be x. These x ports can be divided into k2 groups, where k2 > 1, corresponding to k2 resources. Ports within each k2 resource can occupy the same time slot and use the same symbol to send SRS.

[0435] In one example, when the SRS implements one of the functions of antenna switching, codebook, non-codebook, or beam management, each port of multiple ports in the terminal device can correspond to one SRS resource, and different ports correspond to different SRS resources. Multiple SRS resources corresponding to multiple ports belong to the same SRS resource set. Ports with multiple SRS resources can occupy the same time slot and transmit SRS using the same symbols. The TPMI of uplink data can be associated with ports of multiple SRS resources. In other words, one port constitutes a group of ports, and each port can occupy the same time slot and transmit SRS using the same symbols.

[0436] To better understand the above methods, the following will combine... Figure 9 This method is described.

[0437] For example, Figure 9 A schematic flowchart of another signal transmission method provided in an embodiment of this application is shown. Figure 9As shown, the method may include the following steps:

[0438] S901. Network devices can send RRC configuration signaling to terminal devices. The RRC configuration signaling may include SRS configuration information. The SRS configuration information may include the SRS transmission period, the SRS resource set, the SRS resources included in the SRS resource set, the ports included in the SRS resources, and information related to transmission power, etc.

[0439] S902, the terminal device can send the first SRS through the first port.

[0440] S903. The terminal device can send a second SRS through the second port. The first SRS and the second SRS belong to the same SRS resource set. At least one of the frequency domain resources or transmission power of the first SRS and the second SRS is different.

[0441] The first port and the second port can belong to different groups. Ports in different groups may have different frequency domain resources and transmission power for their transmitted reference signals. The frequency domain resources can be the frequency domain bandwidth occupied by a single SRS transmission; or, the frequency domain resources can be the number of frequency domain resource blocks occupied by a single SRS transmission.

[0442] If the first port and the second port transmit SRS at the same transmit power, the power per RB or per RE will differ due to the different frequency domain bandwidths of the ports, meaning their frequency domain power spectral densities will also differ. When network devices can combine channels from multiple ports, they need to align the frequency domain power spectral densities of the different ports. The difference in frequency domain power spectral density between the SRS transmissions of different ports can be related to the single SRS transmission bandwidth of the port. For example, if the single SRS transmission bandwidth of port 1 is X, the corresponding frequency domain power spectral density is a linear value Y; the single SRS transmission bandwidth of port 2 can be 2X, and the corresponding frequency domain power spectral density can be a linear value Y / 2.

[0443] If the first port and the second port transmit SRS at different transmission powers, the SRS transmission powers of different ports will differ to ensure that the frequency domain power spectral density of the SRS transmission is the same for each port, since the frequency domain bandwidths of the different ports are different. The difference in transmission power between different ports can be related to the single-transmission bandwidth of the port. For example, the single-transmission bandwidth of port 1 is X, the corresponding total time domain power of the SRS transmission is a linear value Z, and the frequency domain power spectral density of the SRS transmission is a linear value Y. The single-transmission bandwidth of port 2 is 2X, the corresponding total time domain power of the SRS transmission is a linear value 2Z, and the frequency domain power spectral density of the SRS transmission is a linear value Y.

[0444] S904, The network device acquires the first channel of the first reference signal and the second channel of the second reference signal.

[0445] S905: Network devices combine the first and second channels to obtain a third channel.

[0446] S906, network devices implement any one of the following functions based on a third channel: antenna switching, codebook, non-codebook, or beam management.

[0447] The network device can obtain a first channel estimate based on a first reference signal and a second channel estimate based on a second reference signal. It can also combine the first and second channel estimates to obtain a weight vector for downlink data transmission, thereby enabling any of the following functions: antenna switching, codebook, non-codebook, or beam management.

[0448] It is understood that in the various embodiments of this application, the interaction between the terminal device and the network device is mainly used as an example for illustrative purposes. This application is not limited to this. The terminal device can be replaced by a receiving device, which can be either a terminal device or a network device. The network device can be replaced by a sending device, which can be either a terminal device or a network device.

[0449] It is also understood that some optional features in the various embodiments of this application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0450] It is also understood that the solutions in the various embodiments of this application can be used in reasonable combinations, and the explanations or descriptions of the various terms appearing in the embodiments can be referenced or explained to each other in the various embodiments, without limitation.

[0451] It is also understood that, in the above-described method embodiments, the methods and operations implemented by a device (such as a terminal device or a network device) can also be implemented by components of the device (such as chips or circuits), without limitation.

[0452] The above, combined with Figures 1 to 9 The methods provided in the embodiments of this application are described in detail below. Figures 10 to 13 The apparatus provided in the embodiments of this application is described in detail. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, for content not described in detail, please refer to the method embodiments above. For the sake of brevity, it will not be repeated here.

[0453] For example, Figure 10This is a schematic diagram of a communication device 1000 provided in an embodiment of this application. The device 1000 includes a processing unit 1010. The processing unit 1010 can be used to perform processing, such as determining the frequency domain resources and transmission power of a reference signal. The functions of the processing unit 1010 can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-a-chip (SoC) chip or a SIP chip containing a modem core. The device 1000 also includes a transceiver unit 1020. The transceiver unit 1020 can be used to implement corresponding communication functions. The transceiver unit 1020 can also be referred to as a communication interface or communication unit.

[0454] Optionally, the device 1000 may further include a storage unit, which can be used to store instructions and / or data, and the processing unit 1010 can read the instructions and / or data in the storage unit to enable the device to implement the aforementioned method embodiments.

[0455] Optionally, the transceiver unit 1020 may include a receiving unit and / or a sending unit. The receiving unit can be used to perform receiving-related operations (such as receiving data or messages), and the sending unit can be used to perform sending-related operations (such as sending data or messages).

[0456] In a first possible design, the device 1000 can be the terminal device in the aforementioned embodiments, which can implement the steps or processes corresponding to those executed by the terminal device in the above method embodiments. The transceiver unit 1020 can be used to perform transceiver-related operations (such as sending and / or receiving data or messages) of the terminal device in the above method embodiments. For example, the transceiver unit 1020 can be used to perform... Figure 8 S801 and S802 in the illustrated embodiment. Processing unit 1010 can be used to perform processing-related operations of the terminal device in the above method embodiments, or operations other than sending and receiving (such as operations other than sending and / or receiving data or messages), such as processing unit 1010 being used to perform... Figure 8 S803 and S804 in the illustrated embodiment.

[0457] Optionally, the transceiver unit 1020 is used to: transmit a first reference signal; transmit a second reference signal; wherein the first reference signal and the second reference signal belong to the same set of reference signal resources, and at least one of the frequency domain resources or transmission power of the first reference signal and the second reference signal is different.

[0458] In a second possible design, the device 1000 can be a network device as described in the foregoing embodiments. This device 1000 can implement the steps or processes performed by the network device corresponding to those described in the method embodiments above. The transceiver unit 1020 can be used to perform transceiver-related operations of the network device described in the method embodiments above.

[0459] For example, the transceiver unit 1020 is used to: receive a first reference signal and a second reference signal, wherein the first reference signal and the second reference signal belong to the same set of reference signal resources, and at least one of the frequency domain resources or transmission power of the first reference signal and the second reference signal is different; the processing unit 1010 is used to: obtain a first channel of the first reference signal and a second channel of the second reference signal; and combine the first channel and the second channel to obtain a third channel.

[0460] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0461] It should also be understood that the device 1000 here is embodied in the form of a functional unit. The term "unit" here can refer to an application-specific integrated circuit (ASIC), electronic circuitry, a processor (e.g., a shared processor, a proprietary processor, or a group processor, etc.) and memory for executing one or more software or firmware programs, integrated logic circuitry, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 1000 can be specifically the communication device in the above embodiments, and can be used to execute the various processes and / or steps corresponding to the communication device in the above method embodiments; to avoid repetition, these will not be described again here.

[0462] The apparatus 1000 of each of the above-described schemes has the function of implementing the corresponding steps performed by the communication device in the above-described methods. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (e.g., the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as processing units, can be replaced by processors, each executing the transceiver operations and related processing operations in each method embodiment.

[0463] In addition, the transceiver unit 1020 described above can also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0464] It should be pointed out that, Figure 10 The device mentioned can be the terminal device or network device in the foregoing embodiments, or it can be a chip or chip system, such as a SoC. The transceiver unit 1020 can be an input / output circuit or a communication interface; the processing unit 1010 is a processor, microprocessor, or integrated circuit integrated on the chip. No limitations are imposed here.

[0465] For example, Figure 11 A schematic diagram of a communication device 1100 is shown. (As shown) Figure 11 As shown, the device 1100 includes a processor 1110, which is coupled to a memory 1120. The memory 1120 is used to store computer programs or instructions and / or data. The processor 1110 is used to execute the computer programs or instructions stored in the memory 1120, or to read the data stored in the memory 1120, in order to perform the methods in the above method embodiments.

[0466] Optionally, there may be one or more processors 1110.

[0467] Optionally, the memory 1120 may be one or more.

[0468] Alternatively, the memory 1120 can be integrated with the processor 1110, or it can be set separately.

[0469] Optionally, such as Figure 11 As shown, the device 1100 also includes a transceiver 1130, which is used for receiving and / or transmitting signals. For example, the processor 1110 is used to control the transceiver 1130 to receive and / or transmit signals. The transceiver 1130 can also be divided into a receiver and / or a transmitter, where the receiver is used to receive signals and the transmitter is used to transmit signals. The receiver is used to perform... Figure 8 The receiver-related operations shown in the method are performed by the transmitter. Figure 8 The method shown includes transmission-related operations. The transceiver 1130 can also be referred to as a communication interface; this embodiment does not limit this definition.

[0470] As an example, processor 1110 may have Figure 11 The processing unit 1220 shown has the function of a storage unit, the memory 1120 may have the function of a storage unit, and the transceiver 1130 may have the function of a storage unit. Figure 11 The function of the transceiver unit 1210 shown is illustrated.

[0471] As one option, the device 1100 is used to implement the operations performed by the communication device in the various method embodiments described above.

[0472] For example, processor 1110 is used to execute computer programs or instructions stored in memory 1120 to implement the relevant operations of terminal devices or network devices in the various method embodiments described above.

[0473] It should be understood that the processor mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), ASICs, field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0474] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0475] When the above Figure 11 When the communication device shown is a chip or chip system, the communication device may include memory 1120, or it may not include memory 1210. When the communication device does not include memory 1210, the communication device may be connected to an external memory to achieve the above-mentioned storage function.

[0476] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0477] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0478] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0479] For example, Figure 12 This is a schematic diagram of a chip system 1200 provided in an embodiment of this application. The chip system 1200 (or may also be referred to as a processing system) includes logic circuitry 1210 and an input / output interface 1220.

[0480] The logic circuit 1210 can be a processing circuit in the chip system 1200. The logic circuit 1210 can be coupled to a memory unit, calling instructions from the memory unit, enabling the chip system 1200 to implement the methods and functions of the embodiments of this application. The input / output interface 1220 can be an input / output circuit in the chip system 1200, outputting processed information from the chip system 1200, or inputting data or signaling information to be processed into the chip system 1200 for processing.

[0481] Optionally, the logic circuit 1210 may be implemented by one or more processors, including the one or more processors or the processing portion of the one or more processors.

[0482] Optionally, the input / output interface 1220 may include transceiver circuitry, a transceiver, input / output circuitry, or a communication interface.

[0483] As one approach, the chip system 1200 is used to implement operations performed by communication devices (such as terminal devices or network devices) in the various method embodiments described above.

[0484] For example, logic circuit 1210 is used to implement processing-related operations performed by a communication device (such as a terminal device or a network device) in the above method embodiments; input / output interface 1220 is used to implement sending and / or receiving-related operations performed by a communication device (such as a terminal device or a network device) in the above method embodiments.

[0485] For example, Figure 13 A schematic diagram of the structure of the communication device 1300 provided in an embodiment of this application is shown. Figure 13As shown, the communication device 1300 includes a processor 1301, a transceiver 1302, and a memory 1303. The processor 1301, transceiver 1302, and memory 1303 communicate with each other via internal interconnection. The memory 1303 stores instructions, such as computer program code. The processor 1301 executes the instructions stored in the memory 1303 to control the transceiver 1302 to send and / or receive signals.

[0486] It should be understood that the communication device 1300 may specifically be a terminal device or a network device as described in the above embodiments, and may be used to execute the various steps and / or processes corresponding to the terminal device or network device in the above method embodiments. Optionally, the memory 1303 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 1301 may be used to execute instructions stored in the memory, and when the processor 1301 executes instructions stored in the memory, the processor 1301 is used to execute the various steps and / or processes of the above method embodiments. The transceiver 1302 may include a transmitter 13021, a receiver 13022, and an antenna 13023. The transmitter 13021 may be used to implement the various steps and / or processes corresponding to the transceiver for performing the transmission action. For example, the transmitter 13021 may be used to transmit information to another device through the antenna 13023. Receiver 13022 can be used to implement the various steps and / or processes corresponding to the transceiver described above for performing the receiving action. For example, receiver 13022 can be used to receive information from another device via antenna 13023.

[0487] It should be understood that in the embodiments of this application, the processor can be a CPU, or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0488] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor executes the instructions in the memory, combining them with its hardware to complete the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0489] This application also provides a computer-readable storage medium storing computer instructions for implementing the methods executed by a communication device (such as a terminal device or a network device) in the above-described method embodiments.

[0490] For example, when the computer program is executed by a computer, it enables the computer to implement the methods described in the embodiments of the above methods, which are executed by a communication device (such as a terminal device or a network device).

[0491] This application also provides a computer program product comprising instructions which, when executed by a computer, implement the methods described above as being performed by a communication device (such as a terminal device or a network device).

[0492] This application also provides a communication system, which includes the terminal devices and / or network devices described in the above embodiments. For example, the system includes... Figure 8 Terminal devices and network devices in the process.

[0493] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0494] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.

[0495] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs). For example, the aforementioned available media include, but are not limited to, various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0496] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of signal transmission, characterized by, Comprising: sending a first reference signal; sending a second reference signal; wherein the first reference signal and the second reference signal belong to the same reference signal resource set, and at least one of the frequency domain resources or the transmission power of the first reference signal and the second reference signal is different.

2. A signal transmission method characterized by, Comprising: receiving a first reference signal and a second reference signal, wherein the first reference signal and the second reference signal belong to the same reference signal resource set, and at least one of the frequency domain resources or the transmission power of the first reference signal and the second reference signal is different; obtaining a first channel of the first reference signal and a second channel of the second reference signal; combining based on the first channel and the second channel to obtain a third channel.

3. The method according to claim 1 or 2, characterized in that, The frequency domain resource is the frequency domain bandwidth occupied by at least one reference signal transmission; or, the frequency domain resource is the number of frequency domain resource blocks occupied by at least one reference signal transmission.

4. The method according to any one of claims 1 to 3, characterized in that, The frequency domain resources of the first reference signal and the second reference signal are different, and the first reference signal and the second reference signal further satisfy one or more of the following: The transmission power of the first reference signal and the second reference signal is the same; or, The power spectral density of the first reference signal and the second reference signal is different; or, The frequency domain resources of the first reference signal and the second reference signal are in a multiple relationship; or, The transmission power of the first reference signal and the second reference signal is different; or, The power spectral density of the first reference signal and the second reference signal is the same.

5. The method according to any one of claims 1 to 4, characterized in that, The frequency domain resources of the first reference signal and the second reference signal are different, including one or more of the following: The transmission comb of the first reference signal and the second reference signal is different, and the transmission comb is used to determine the frequency domain resource; or, The frequency hopping parameter of the first reference signal and the second reference signal is different, and the frequency hopping parameter is used to determine the frequency domain resource; or, The repetition factor of the first reference signal and the second reference signal is different, and the repetition factor is used to determine the frequency domain resource; or, The frequency domain expansion factor of the first reference signal and the second reference signal is different, and the repetition factor is used to determine the frequency domain resource.

6. The method according to claim 4 or 5, characterized in that, The first reference signal and the second reference signal correspond to the same reference signal count.

7. The method according to any one of claims 1 to 3, characterized in that, The transmission power of the first reference signal and the second reference signal is different, and the first reference signal and the second reference signal further satisfy one or more of the following: The frequency domain resources of the first reference signal and the second reference signal are the same; or, The frequency domain resources of the first reference signal and the second reference signal are different; or, The power spectral density of the first reference signal and the second reference signal is different; or, The power spectral density of the first reference signal and the second reference signal is the same; or, The transmission power of the first reference signal and the second reference signal is in a multiple relationship.

8. The method of claim 7, wherein, The transmission power of the first reference signal and the second reference signal is different, and further includes one or more of the following: The power expansion factor of the first reference signal and the second reference signal is different, and the power expansion factor is used to determine the transmission power; or The transmission power offset of the first reference signal and the second reference signal is different, and the transmission power offset is used to determine the transmission power; or The downlink loss estimation value of the first reference signal and the second reference signal is different, and the downlink loss estimation value is used to determine the transmission power; or The frequency domain resource of the first reference signal and the second reference signal is different, and the frequency domain resource is used to determine the transmission power.

9. The method of claim 8, wherein, When the downlink loss estimation value and the frequency domain resource are used to determine the transmission power, the transmission power, the downlink loss estimation value and the frequency domain resource satisfy at least one of the following formulas: Or Or Or Or Or Or When the transmission power is related to the transmission power offset, the transmission power and the transmission power offset satisfy the following formula: Where b represents the active uplink bandwidth, f represents the carrier, c represents the serving cell, and q represents the serving cell. s Denotes the set of reference signal resources, q d The reference signal resource index is used to calculate the downlink path loss estimate, l represents the reference signal power control adjustment status index, and P represents the reference signal resource resource index used to calculate the downlink path loss estimate. SRS,b,f,c (i,q s ,l,g i The following are the information defined by the terminal device: the serving cell c, the carrier f, the activated uplink bandwidth b, the reference signal power control adjustment state index l, and the reference signal resource set q. s g i The transmission power of the reference signal at the i-th transmission timing, P SRS,b,f,c (i,q s (l) represents the serving cell c determined by the terminal device, the carrier f, the activated uplink bandwidth b, the reference signal power control adjustment state index l, and the reference signal resource set q. s The transmission power of the reference signal at the i-th transmission time, M SRS,b,f,c (i) represents the frequency domain resources occupied by the reference signal at the i-th transmission time, M SRS,b,f,c (i,g i ) represents the g-th i The frequency domain resources occupied by a reference signal during the i-th transmission, PL b,f,c (q d ,g i The following are the information defined by the terminal device: the serving cell c, the carrier f, the activated uplink bandwidth b, and the reference signal resource index q. d The calculated downlink path loss estimate for the gi-th reference signal, PL b,f,c (q d The serving cell c, the carrier f, the activated uplink bandwidth b, and the reference signal resource index q determined by the terminal device. d The calculated downlink path loss estimate of the reference signal. P represents the transmit power offset of the gi-th reference signal, G represents the number of antenna ports used to transmit the gi-th reference signal, and P represents the transmit power offset of the gi-th reference signal. CMAX,f,c (i) represents the maximum frequency domain transmission power configured for the serving cell c and the carrier f during the i-th transmission of the reference signal, P O_SRS,b,f,c (q s () represents the serving cell c, the carrier f, the activated uplink portion bandwidth b, and the reference signal resource set q. s p0 provides α SRS,b,f,c (q s ) represents the serving cell c, the carrier f, the activated uplink partial bandwidth b, the reference signal resource set q s provided by alpha, and h b,f,c (i, l) represents the serving cell c, the carrier f, the power adjustment value based on the reference signal power control adjustment state index l at the i-th reference signal transmission occasion of the reference signal, and μ is related to the subcarrier spacing and has a corresponding relationship with the subcarrier spacing.

10. The method according to any one of claims 1 to 9, characterized in that, The first reference signal and the second reference signal occupy the same time domain resource.

11. The method according to any one of claims 1 to 10, characterized in that, The first reference signal and the second reference signal correspond to different reference signal resources in the same reference signal resource set.

12. The method of claim 11, wherein, The first reference signal corresponds to a first reference signal resource, and the second reference signal corresponds to a second reference signal resource, and the number of ports included in the first reference signal resource is different from the number of ports included in the second reference signal resource.

13. A communications device, characterized by The apparatus comprises a module or unit for performing the method of any one of claims 1 to 12.

14. A communications device, characterized by The apparatus comprises a processor configured to execute computer programs or instructions to cause the apparatus to perform the method of any one of claims 1 to 12.

15. The apparatus of claim 14, wherein The apparatus further comprises a memory configured to store the computer programs or instructions; and / or The apparatus further comprises a communication interface coupled to the processor, and the communication interface is configured to input and / or output information.

16. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, and when the computer programs or instructions run on the communication apparatus, the communication apparatus performs the method of any one of claims 1 to 12.

17. A computer program product, characterised in that, The computer program product comprises computer programs or instructions for performing the method of any one of claims 1 to 12. The computer program product comprises computer programs or instructions for performing the method of any one of claims 1 to 12.

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