Signal transmission method and transmission apparatus

Abstract

The present application provides a signal transmission method and transmission apparatus. The method may comprise: a terminal device sends a first reference signal and a second reference signal to a network device, wherein the first reference signal and the second reference signal belong to a same reference signal resource set, and at least one of frequency-domain resources or transmission powers of the first reference signal and the second reference signal is different. The network device may acquire 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. Thus, in the same reference signal resource set, at least one of frequency-domain resources or transmission powers of different reference signals is different. In scenarios where the signal strengths of the different reference signals vary, the method facilitates improving the channel estimation accuracy of the reference signals.

Description

Signal transmission method and transmission apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411258958.0, filed on September 6, 2024, and entitled "Signal transmission method and transmission apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of wireless communication, in particular to a signal transmission method and transmission apparatus. BACKGROUND

[0003] 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 one SRS resource can contain one or more antenna ports. The terminal device can send an SRS signal on the allocated SRS resource through one or more antenna ports. The network device can perform uplink channel estimation on the antenna ports of the terminal device based on the SRS signal.

[0004] However, in this scenario, the channel estimation accuracy of the SRS can be low. SUMMARY

[0005] The present application provides a signal transmission method and transmission apparatus, which is beneficial to improve the channel estimation accuracy of the SRS.

[0006] In a first aspect, a communication method is provided. The method can be executed by a terminal-side communication apparatus, or can also be executed by other subjects, which is not limited in the present application. Wherein, the terminal-side communication apparatus can be a terminal device, or a functional module in the terminal device, a communication module, a chip, a chip system or a circuit (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core), or a functional module capable of invoking and executing a program in the terminal device, etc. For the convenience of description, the following will be described by taking the terminal device as an example.

[0007] The method comprises: sending a first reference signal; and 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.

[0008] The frequency domain resource can be understood as a frequency domain bandwidth or a frequency domain resource block number. The transmission power can be understood as a frequency domain transmission power. The at least one difference between the frequency domain resources or the transmission powers of the first reference signal and the second reference signal can include three cases. The three cases can be specifically: 1) the frequency domain resources of the first reference signal and the second reference signal are different, and the transmission powers are the same. 2) the frequency domain resources of the first reference signal and the second reference signal are the same, and the transmission powers are different. 3) the frequency domain resources of the first reference signal and the second reference signal are different, and the transmission powers are different.

[0009] The signal transmission method provided by the embodiments of the present application has at least one difference between the frequency domain resources or the transmission powers of different reference signals in the same reference signal resource set, which is beneficial to improve the channel estimation accuracy of the reference signal in the scenario where the signal strengths of different reference signals are different.

[0010] Optionally, the terminal device can send the first reference signal through the first port and can send the second reference signal through the 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, which are not limited in the present application. The first port is different from the second port.

[0011] In this way, the reference signals sent through different ports can correspond to different frequency domain resources and / or different transmission powers, which is beneficial to improve the channel estimation accuracy of the reference signal in the case where the channel qualities of different ports are different.

[0012] Optionally, the first port and the second port can belong to different port groups. The reference signals sent by the ports in the same port group can use the same frequency domain resources and transmission powers. The reference signals sent by the ports in different port groups can use different frequency domain resources and / or different transmission powers.

[0013] In this way, the different ports are grouped, the ports in the same group correspond to the same frequency domain resources and transmission powers, and the ports in different port groups correspond to different frequency domain resources and / or different transmission powers, which is beneficial to reduce the complexity compared with the different ports corresponding to different frequency domain resources and / or different transmission powers.

[0014] Optionally, the channel quality of ports in different port groups is different, and the channel quality of ports in the same port group is similar. For example, the channel quality of ports in different port groups is greater than a channel quality threshold, and the channel quality of ports in the same port group is less than the channel quality threshold. In this way, the channel quality of the first port and the second port can be different. In the case of different channel qualities, the reference signals sent by the first port and the second port can use different frequency domain resources and / or different transmission powers, which is beneficial to improving the channel estimation accuracy of the port with poor channel quality and reducing the interference of the reference signal sent by the port with good channel quality on the reference signals of other users. In combination with the first aspect, in some possible implementation manners, the frequency domain resource is a frequency domain bandwidth occupied by at least one reference signal transmission; or the frequency domain resource is a number of frequency domain resource blocks occupied by at least one reference signal transmission; or the frequency domain resource is a number of frequency domain resource elements occupied by at least one reference signal transmission.

[0015] Optionally, the frequency domain resource can be a frequency domain bandwidth occupied by a single reference signal transmission; or the frequency domain resource is a number of frequency domain resource blocks occupied by a single reference signal transmission; or the frequency domain resource is a number of frequency domain resource elements occupied by a single reference signal transmission.

[0016] In combination with the first aspect, in some possible implementation manners, 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 powers of the first reference signal and the second reference signal are the same; or the power spectrum densities of the first reference signal and the second reference signal are different; or the frequency domain resources of the first reference signal and the second reference signal are in a multiple relationship; or the transmission powers of the first reference signal and the second reference signal are different; or the power spectrum densities of the first reference signal and the second reference signal are the same.

[0017] For example, the frequency domain resources of the first reference signal and the second reference signal are different, the transmission powers of the first reference signal and the second reference signal are the same, and the power spectrum densities of the first reference signal and the second reference signal are different.

[0018] The transmission powers are the same, and the frequency domain resources are different, so that the power of each resource block or each resource element in the frequency domain is different, and the frequency domain power spectrum density is different, which can be applicable to ports with different channel qualities, improve the channel estimation accuracy of the port with poor channel quality, and reduce the interference of the reference signal sent by the port with good channel quality on the reference signals of other users.

[0019] For another example, the frequency domain resources of the first reference signal and the second reference signal are different, and the transmission powers of the first reference signal and the second reference signal are different.

[0020] The first reference signal and the second reference signal have different frequency domain resources, different transmission powers, and can be applicable to ports with different channel qualities, which is beneficial to improving the channel estimation accuracy of the ports with poor channel quality and reducing the interference of the reference signals transmitted by the ports with good channel quality on the reference signals of other users.

[0021] Optionally, the power spectral densities of the first reference signal and the second reference signal can be the same.

[0022] The first reference signal and the second reference signal have different frequency domain resources, and in the case of the same power spectral densities, the first reference signal and the second reference signal can have different transmission powers. In this way, it is beneficial to improve the accuracy of function implementation, for example, to improve the channel estimation accuracy.

[0023] For another example, the first reference signal and the second reference signal have different frequency domain resources, and the frequency domain resources of the first reference signal and the second reference signal have a multiple relationship.

[0024] The first reference signal and the second reference signal have different frequency domain resources, which can be applicable to ports with different channel qualities, which is beneficial to improving the channel estimation accuracy of the ports with poor channel quality and reducing the interference of the reference signals transmitted by the ports with good channel quality on the reference signals of other users. The frequency domain resources of the first reference signal and the second reference signal have a multiple relationship, which is beneficial to simplifying the indication mode of signaling and the specific implementation mode of the terminal side communication device.

[0025] In combination with the first aspect, in some possible implementation manners, 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, the transmission comb being used to determine the frequency domain resources; or, the frequency hopping parameter of the first reference signal and the second reference signal is different, the frequency hopping parameter being used to determine the frequency domain resources; or, the repetition factor of the first reference signal and the second reference signal is different, the repetition factor being used to determine the frequency domain resources; or, the frequency domain expansion factor of the first reference signal and the second reference signal is different, the repetition factor being used to determine the frequency domain resources.

[0026] The frequency domain resources of the first reference signal and the second reference signal can be implemented through different transmission combs.

[0027] For example, the transmission comb of the first reference signal can be 2, and the first reference signal can be transmitted with one subcarrier interval between every two subcarrier intervals. As shown in FIG. 4, the frequency domain resources of the first reference signal can include the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers, or the 2nd, 4th, 6th, 8th, 10th, and 12th subcarriers.

[0028] The transmission comb of the second reference signal can be 4, and the second reference signal can be transmitted with one subcarrier interval between every four subcarriers. If one RB includes 12 subcarriers, the frequency domain resource 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.

[0029] In this way, different transmission combs implement different frequency domain resources, which can improve the occupation rate of different subcarriers and is beneficial to optimizing the spectrum utilization.

[0030] The frequency domain resources of the first reference signal and the second reference signal are different and can be implemented by a frequency hopping parameter. The frequency hopping parameter can include one or more of B SRS , C SRS and b hop . Wherein, C SRS is an index number of a cell-specific reference signal bandwidth configuration, B SRS is an index number of a user-specific reference signal bandwidth configuration, and b hop indicates whether to perform reference signal frequency hopping (or indicates the frequency hopping bandwidth occupied by the reference signal on one symbol).

[0031] In a possible implementation, B SRS and C SRS of the first reference signal and the second reference signal are the same, and b hop is different. The smaller b hop is, the more frequency domain resources are, and correspondingly, the larger b hop is, the less frequency domain resources are, so as to facilitate the frequency domain resources of the first reference signal and the second reference signal to be different.

[0032] Exemplarily, as shown in Table 1 above, when C SRS = 63 and B SRS = 0, if b hop of the first reference signal = 1, it can indicate that the frequency domain resource of the first reference signal includes 16 RBs, and if b hop of the second reference signal = 2, it can indicate that the frequency domain resource of the second reference signal includes 8 RBs.

[0033] In this way, there is one difference in the frequency hopping parameter, and the implementation is simple.

[0034] In another possible implementation, B SRS , C SRS and b hop of the first reference signal and the second reference signal are different.

[0035] Exemplarily, the frequency domain resource is a frequency domain bandwidth occupied by a single reference signal transmission, and the first reference signal transmission total bandwidth and the second reference signal transmission total bandwidth can be the same or different. As can be known from Table 1 above, if B SRS = 0, C SRS = 63, b hop = 1, it can be indicated that the first reference signal transmission total bandwidth can be 272 RBs, and the single first reference signal transmission bandwidth can be 16 RBs. If B SRS = 0, C SRS = 34, b hop = 1, it can be indicated that the second reference signal transmission total bandwidth can be 136 RBs, and the single second reference signal transmission bandwidth can be 4 RBs.

[0036] In this way, there can be one or more different frequency hopping parameters, and the different parameters are not limited, and the flexibility is stronger.

[0037] The frequency domain resources of the first reference signal and the second reference signal can be implemented by different repetition factors. The smaller the repetition factor is, the fewer the number of times of reference signal repetition is, the smaller the gain of joint channel estimation that can be performed by the receiving side of the reference signal is, but the shorter the time for the reference signal to complete full bandwidth frequency hopping is. Correspondingly, the more the repetition factor is, the more the number of times of reference signal repetition is, the greater the gain of joint channel estimation that can be performed by the receiving side of the reference signal is, but the longer the time for the reference signal to complete full bandwidth frequency hopping is.

[0038] In this way, different frequency domain resources are implemented by different repetition factors, and the repetition factor can be flexibly adjusted according to network requirements and channel conditions, and the flexibility is stronger.

[0039] The frequency domain resources of the first reference signal and the second reference signal can be implemented by different frequency domain expansion factors.

[0040] Different reference signals can be configured with different frequency domain expansion factors. The unit of the frequency domain expansion factor can be a linear value or a dB value. If the unit of the frequency domain expansion factor is a linear value, the frequency domain expansion factor can be a multiple relationship of the frequency domain resource of each reference signal on the basis of the original frequency domain resource. Wherein, the frequency domain expansion factor greater than 1 indicates that the frequency domain resource is lifted or increased, and the frequency domain expansion factor less than 1 indicates that the frequency domain resource is reduced or decreased. The original frequency domain resource can also be referred to as a reference frequency domain resource, which is not limited in the present application. The frequency domain expansion factor can also be referred to as a frequency weight, which is not limited in the present application.

[0041] For example, the frequency domain expansion factor of 0.5 indicates that the original frequency domain resource is used to transmit the reference signal corresponding to the frequency domain expansion factor by half, and the frequency domain expansion factor of 2 indicates that the original frequency domain resource is used to transmit the reference signal corresponding to the frequency domain expansion factor by 2 times.

[0042] If the unit of the frequency domain spreading factor is dB value, the terminal device can convert the dB value into a linear value based on a preset conversion relationship, and then calculate based on the calculation method of the linear value shown above.

[0043] In this way, the frequency domain resources of the first reference signal and the second reference signal are different by different frequency domain spreading factors, and the frequency domain resources are different by simple calculation, which is simple to implement.

[0044] In combination with the first aspect, in some possible implementation manners, the first reference signal and the second reference signal correspond to the same reference signal count.

[0045] In combination with the first aspect, in some possible implementation manners, 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 spectrum densities of the first reference signal and the second reference signal are different; or the power spectrum densities of the first reference signal and the second reference signal are the same; or the transmission power of the first reference signal and the second reference signal is in a multiple relationship.

[0046] For example, the transmission power of the first reference signal and the second reference signal is different, the frequency domain resources of the first reference signal and the second reference signal are the same, and the power spectrum densities of the first reference signal and the second reference signal are different.

[0047] The transmission power is different, and the frequency domain resources are the same. In this way, the power of each resource block or each resource element in the frequency domain is different, and the frequency domain power spectrum density is different. This can be applicable to ports with different channel qualities, is conducive to improving the channel estimation accuracy of ports with poor channel quality, and reduces the interference of reference signals sent by ports with good channel quality on reference signals of other users.

[0048] For another example, the transmission power of the first reference signal and the second reference signal is different, and the frequency domain resources of the first reference signal and the second reference signal are different.

[0049] The frequency domain resources are different, and the transmission power is different. This can be applicable to ports with different channel qualities, is conducive to improving the channel estimation accuracy of ports with poor channel quality, and reduces the interference of reference signals sent by ports with good channel quality on reference signals of other users.

[0050] Optionally, the power spectrum densities of the first reference signal and the second reference signal can be the same.

[0051] The frequency domain resources of the first reference signal and the second reference signal are different, and the transmission powers of the first reference signal and the second reference signal can be different in the case of the same power spectral density. In this way, the accuracy of the function implementation can be improved, for example, the channel estimation accuracy is improved.

[0052] For another example, the transmission powers of the first reference signal and the second reference signal are different, and the transmission powers of the first reference signal and the second reference signal can be in a multiple relationship.

[0053] The transmission powers of the first reference signal and the second reference signal are different, which can be applicable to ports with different channel qualities, and is beneficial to improve the channel estimation accuracy of the port with poor channel quality and reduce the interference of the reference signal transmitted by the port with good channel quality to the reference signal of other users. The transmission powers of the first reference signal and the second reference signal are in a multiple relationship, which is simple to implement.

[0054] In combination with the first aspect, in some possible implementation manners, the transmission powers of the first reference signal and the second reference signal are different, and further comprising one or more of the following: the power expansion factors of the first reference signal and the second reference signal are different, the power expansion factor being used to determine the transmission power; or the transmission power offsets of the first reference signal and the second reference signal are different, the transmission power offset being used to determine the transmission power; or the downlink loss estimation values of the first reference signal and the second reference signal are different, the downlink loss estimation value being used to determine the transmission power; or the frequency domain resources of the first reference signal and the second reference signal are different, the frequency domain resource being used to determine the transmission power.

[0055] The transmission powers of the first reference signal and the second reference signal are different, which can be implemented by different power expansion factors.

[0056] Different reference signals can be configured with different power expansion factors. The unit of the power expansion factor can be a linear value or a dB value. If the unit of the power expansion factor is a linear value, the power expansion factor can be a multiple relationship of the transmission power of each reference signal based on the original transmission power. Wherein, the power expansion factor greater than 1 indicates that the transmission power is raised or increased, and the power expansion factor less than 1 indicates that the transmission power is reduced or decreased. The original transmission power can also be referred to as the reference transmission power, which is not limited in the present application. The power expansion factor can also be referred to as a power weight, which is not limited in the present application.

[0057] For example, the power expansion factor of 0.5 indicates that the reference signal corresponding to the power expansion factor is transmitted with half of the original power, and the power expansion factor of 2 indicates that the reference signal corresponding to the power expansion factor is transmitted with twice the original power.

[0058] The unit of the power expansion factor is dB value, and the power expansion factor can be a power value superimposed on the original transmission power of each reference signal.

[0059] For example, a power expansion factor of 10 indicates that the reference signal corresponding to the power expansion factor is transmitted with the original power increased by 10 dB, and a power expansion factor of -5 indicates that the reference signal corresponding to the power expansion factor is transmitted with the original power reduced by 5 dB.

[0060] Optionally, different reference signals are associated with different power expansion factors, and the terminal device determines that the total transmission power of the first reference signal and the second reference signal is X, and 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 reference signal transmission power for different power expansion factors.

[0061] For example, when the unit of the original transmission power of the terminal-side communication device is different from the unit of the power expansion factor, the two need to be converted to the same unit, and then the actual transmission power is calculated. If the power expansion factor is a dB value, and the unit of the original transmission power X / 2 is also a dB, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 0.5+X / 2; the power expansion factor corresponding to the second reference signal is 2, and the actual transmission power of the second reference signal can be 2+X / 2; and the actual total transmission power of the first reference signal and the second reference signal can be X+2.5.

[0062] If the power expansion factor is a linear value, and the unit of the original transmission power X / 2 is also a linear value, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 0.5*X / 2; the power expansion factor corresponding to the second reference signal is 2, and the actual transmission power of the second reference signal can be 2*X / 2; and the actual total transmission power of the first reference signal and the second reference signal can be X / 4+X=5X / 4.

[0063] If the power expansion factor is a linear value, and the unit of the original transmission power X / 2 is a dB value, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the power expansion factor corresponding to the second reference signal is 2, and the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; and the actual total transmission power of the first reference signal and the second reference signal is a dB value, and the value is X+10*log10(0.5)+10*log10(2).

[0064] 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 off 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.

[0065] In this way, the transmission of the first reference signal and the second reference signal is different through different power expansion factors, the power resources are different through simple calculation, and the implementation is simple.

[0066] The transmission power of the first reference signal and the second reference signal can be realized through 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 can be the difference between the transmission power of each reference signal and the transmission power of a certain reference signal, or can be that the reference signals are sorted, and the difference between the transmission power of each reference signal and the transmission power of the previous reference signal.

[0067] Optionally, different reference signals are associated with different transmission power offsets, the terminal device determines that the total transmission power of the first reference signal and the second reference signal is X, and the corresponding same original transmission power of the first reference signal and the second reference signal can be X / 2, at this time the terminal device can determine the final reference signal transmission power according to different transmission power offsets.

[0068] 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 and the unit of the transmission power offset are different, the two need to be converted to the same unit, and then the actual transmission power is calculated. If the transmission power offset is a dB value, and the original transmission power X / 2 unit is also a dB, the transmission power offset corresponding to the first reference signal is 0.5, and 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, and 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+2.5.

[0069] If the transmission power offset is a linear value, and the original transmission power X / 2 unit is also a linear value, the actual transmission power of the first reference signal can be 0.5*X / 2, if the transmission power offset of the first reference signal is 0.5; the actual transmission power of the second reference signal can be 2*X / 2, if the transmission power offset of the second reference signal is 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 unit is a dB value, the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2, if the transmission power offset of the first reference signal is 0.5; the actual transmission power of the second reference signal can be 10*log10(2)+X / 2, if the transmission power offset of the second reference signal is 2; the actual total transmission power of the first reference signal and the second reference signal is a dB value, and the value is X+10*log10(0.5)+10*log10(2);

[0070] 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 off 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.

[0071] In addition, the transmission power of the first reference signal and the second reference signal can also be realized by a power expansion factor and a transmission power offset. In this case, the power expansion factor can be a linear value, and the transmission power offset can also be a linear value; or the power expansion factor can be a dB value, and the transmission power offset can also be a dB value; or the power expansion factor can be a linear value, and the transmission power offset can also be a dB value; or the power expansion factor can be a dB value, and the transmission power offset can also be a linear value. The specific implementation can refer to the above examples, which will not be described here.

[0072] The transmission power of the first reference signal and the second reference signal can be realized by different downlink path loss estimation values.

[0073] Different reference signals are associated with the same or different path loss reference signals, different downlink path loss estimation values are estimated based on the path loss reference signals, and different transmission powers are determined for different reference signals based on the downlink path loss estimation values; the ports suitable for different channel qualities are beneficial to improve the channel estimation accuracy of the ports with poor channel quality and reduce the interference of the reference signals transmitted by the ports with good channel quality to other user's reference signals.

[0074] Optionally, the first port with stronger channel quality corresponds to a smaller path loss estimation value, and thus the terminal device determines a smaller transmission power for transmitting the first reference signal corresponding to the first port with stronger channel quality based on the smaller path loss estimation value, which is beneficial to reducing the interference of the first reference signal corresponding to the first port with stronger channel quality on reference signals of other users. The second port with weaker channel quality corresponds to a larger path loss estimation value, and thus the terminal device determines a larger transmission power for transmitting the second reference signal corresponding to the second port with weaker channel quality based on the larger path loss estimation value, which is beneficial to improving the channel estimation accuracy of the second reference signal of the second port with weaker channel quality.

[0075] The transmission powers of the first reference signal and the second reference signal are different, and can be implemented by different frequency domain resources. The transmission power can be related to the frequency domain resource, and different transmission powers can be obtained by setting different frequency domain resources.

[0076] Optionally, different reference signals are associated with different frequency domain resources, and the terminal device determines to use different transmission powers for different reference signals based on the frequency domain resources, which can be applicable to ports with different channel qualities, is beneficial to improving the channel estimation accuracy of ports with poor channel quality and reducing the interference of reference signals transmitted by ports with good channel quality on reference signals of other users.

[0077] Optionally, the first reference signal of the first port with stronger channel quality corresponds to larger frequency domain resources, and the first reference signal of the second port with weaker channel quality corresponds to smaller frequency domain resources; the frequency domain resources can be frequency domain bandwidth, or frequency domain resource block number, or frequency domain resource element number. The terminal device determines the first transmission power based on the frequency domain resources of the first reference signal, and determines the second transmission power based on the frequency domain resources of the second reference signal, and then determines the maximum transmission power P CMAX,f,c (i) determining a third transmission power, and the first reference signal and the second reference signal both use the third transmission power. Since the frequency domain resources of the first reference signal are larger than the frequency domain resources of the second reference signal, the frequency domain power spectral density of the first reference signal is smaller than the frequency domain power spectral density of the second reference signal under the same transmission power, which 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 on reference signals of other users.

[0078] In combination with the first aspect, in some possible implementation manners, when the downlink path loss estimation value and the frequency domain resource are used to determine the transmission power, the transmission power, the downlink path loss estimation value, and the frequency domain resource satisfy at least one of the following formulas:

[0079] or,

[0080] or,

[0081] or,

[0082] or,

[0083] or,

[0084] or,

[0085] When the transmit power is related to the transmit power offset, the transmit power and the transmit power offset satisfy the following formula:

[0086] 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 determined by the terminal equipment, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and 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 represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q determined by the terminal device. d Calculate the g-th i The downlink path loss estimate for each reference signal, PL b,f,c (q dThe terminal device determines a serving cell c, a carrier f, an activated uplink partial bandwidth b, and a reference signal resource index q d The calculated downlink loss estimation value of the reference signal, ∑ gi X(g i ) represents the transmission power offset of the g i th reference signal, and G represents the number of antenna ports used to transmit the g i th reference signal, P CMAX,f,c (i) represents the frequency domain maximum transmission power configured by the serving cell c, the carrier f, in the i O_SRS,b,f,c th transmission occasion of the reference signal, P s (q s ) represents the p0 provided by the serving cell c, the carrier f, the activated uplink partial bandwidth b, and the reference signal resource set q SRS,b,f,c (q s ) represents the alpha provided by the serving cell c, the carrier f, the activated uplink partial bandwidth b, and the reference signal resource set q s h b,f,c (i, l) represents the power adjustment value of the serving cell c, the carrier f, in the i

[0087] In some possible implementation manners, the first reference signal occupies the same time domain resource as the reference signal.

[0088] The same time domain resource can be understood as the same symbol in the same time slot. In this way, it is beneficial to more efficiently utilize limited time domain resources and reduce the probability of resource waste.

[0089] In some possible implementation manners, the first reference signal and the second reference signal correspond to different reference signal resources in the same reference resource set.

[0090] The first reference signal can correspond to a first reference signal resource, and the second reference signal can correspond to a second reference signal resource. The first reference signal resource and the second reference signal resource can belong to the same reference signal resource set.

[0091] In some possible implementation manners, the first reference signal corresponds to a first reference signal resource, and the second reference signal corresponds to a second reference signal resource. 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.

[0092] In a second aspect, a communication method is provided. The method can be performed by a network-side communication apparatus, or can also be performed by other subjects, which are not limited in the present application. The network-side communication apparatus includes a network device, or a functional module in the network device, a communication module chip, a chip system or circuit, or a central unit (CU) or distributed unit (DU) in the network device, or a functional module capable of invoking and executing a program in the network device. For ease of description, the following is described by way of example of being performed by a network device.

[0093] The method comprises: receiving a first reference signal and a second reference signal, wherein the first reference signal and the second reference signal belong to a same reference signal resource set, and at least one of 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.

[0094] In combination with the second aspect, in some possible implementation manners, the frequency domain resources are frequency domain bandwidths occupied by at least one reference signal transmission; or the frequency domain resources are frequency domain resource block numbers occupied by at least one reference signal transmission, or the frequency domain resources are frequency domain resource element numbers occupied by at least one reference signal transmission.

[0095] In combination with the second aspect, in some possible implementation manners, 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.

[0096] In combination with the second aspect, in some possible implementation manners, the frequency domain resources of the first reference signal and the second reference signal are different, and include one or more of the following: the transmission comb of the first reference signal and the second reference signal is different, the transmission comb being used to determine the frequency domain resources; or the frequency hopping parameter of the first reference signal and the second reference signal is different, the frequency hopping parameter being used to determine the frequency domain resources; or the repetition factor of the first reference signal and the second reference signal is different, the repetition factor being used to determine the frequency domain resources; or the frequency domain expansion factor of the first reference signal and the second reference signal is different, the repetition factor being used to determine the frequency domain resources.

[0097] With reference to the second aspect, in some possible implementation, the first reference signal and the second reference signal correspond to a same reference signal count.

[0098] With reference to the second aspect, in some possible implementation, the first reference signal and the second reference signal have different transmission powers, and the first reference signal and the second reference signal further satisfy one or more of the following: the first reference signal and the second reference signal have 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 same power spectral densities; or, the first reference signal and the second reference signal have a multiple relationship in transmission powers.

[0099] With reference to the second aspect, in some possible implementation, the first reference signal and the second reference signal have different transmission powers, and the first reference signal and the second reference signal further satisfy one or more of the following: the first reference signal and the second reference signal have different power expansion factors, the power expansion factor being used to determine the transmission power; or, the first reference signal and the second reference signal have different transmission power offsets, the transmission power offset being used to determine the transmission power; or, the first reference signal and the second reference signal have different downlink path loss estimation values, the downlink path loss estimation value being used to determine the transmission power; or, the first reference signal and the second reference signal have different frequency domain resources, the frequency domain resource being used to determine the transmission power.

[0100] With reference to the second aspect, in some possible implementation, when the downlink path loss estimation value and the frequency domain resource are used to determine the transmission power, the transmission power, the downlink path loss estimation value and the frequency domain resource satisfy at least one of the following formulas:

[0101] or,

[0102] or,

[0103] or,

[0104] or,

[0105] or,

[0106] or,

[0107] When the transmission power is related to the transmission power offset, the transmission power and the transmission power offset satisfy the following formula:

[0108] wherein, b represents an activated uplink partial bandwidth, f represents a carrier, c represents a serving cell, and q represents a reference signal count.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 determined by the terminal equipment, carrier f, active uplink bandwidth b, reference signal power control adjustment state index l, and 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 represents the serving cell c, carrier f, active uplink bandwidth b, and reference signal resource index q determined by the terminal device. d Calculate the g-th i The downlink path loss estimate for each 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, ∑ gi X(g i ) represents the g-th i The transmit power offset of the g-th reference signal, G represents the power offset used to transmit the g-th reference signal. i The number of antenna ports for each reference signal, P 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. salpha provided in the alpha table in 3GPP TS 36.213, and h b,f,c (i, l) represents the power adjustment value of the serving cell c, the carrier f, the reference signal the i-th transmission occasion, and the reference signal power control adjustment state index l, μ is related to the subcarrier spacing, and there is a corresponding relationship between μ and the subcarrier spacing. For example, when the subcarrier spacing is 15 kHz, μ is 0; when the subcarrier spacing is 15 kHz, μ is 1.

[0109] In combination with the second aspect, in some possible implementation manners, the first reference signal and the reference signal occupy the same time domain resource.

[0110] In combination with the second aspect, in some possible implementation manners, the first reference signal and the second reference signal correspond to different reference signal resources in the same reference resource set.

[0111] In combination with the second aspect, in some possible implementation manners, 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.

[0112] The third aspect provides a communication apparatus, which is configured to execute the method in any possible implementation manner of the first aspect and the second aspect. Specifically, the apparatus can include units and / or modules for executing the method in any possible implementation manner of the first aspect and the second aspect, such as a processing unit and / or a communication unit.

[0113] In an implementation manner, the apparatus is a communication device (such as a terminal device, and also such as a network device). When the apparatus is a communication device, the communication unit can be a transceiver, or an input / output interface; and 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.

[0114] In another implementation manner, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device (such as a terminal device, and also such as a network device). When the apparatus is a chip, a chip system or a circuit for a communication device, the communication unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip, the chip system or the circuit, and the processing unit can be at least one processor, a processing circuit or a logic circuit.

[0115] In a fourth aspect, a communication apparatus is provided, which comprises at least one processor configured to execute computer programs or instructions to perform the method in any possible implementation of the first aspect and the second aspect. Optionally, the apparatus further comprises a memory configured to store the computer programs or instructions. Optionally, the apparatus further comprises a communication interface coupled to the processor, configured to input the computer programs or instructions to the processor, or output information in the processor.

[0116] In an implementation form, the apparatus is a communication device, such as a terminal device, or a network device.

[0117] In another implementation form, the apparatus is a chip, chip system or circuit, or a communication module for a communication device, such as a terminal device, or a network device.

[0118] In a fifth aspect, a processor is provided, configured to perform the method provided in any possible implementation of the first aspect and the second aspect.

[0119] For the sending and obtaining / receiving operations of the processor, if no special description is provided, or if it does not contradict the actual role or internal logic in the related description, it can be understood as the output and receiving, input operations of the processor, or the sending and receiving operations performed by the radio frequency circuit and the antenna, which are not limited in the present application.

[0120] Optionally, the apparatus further comprises a memory configured to store programs; and the at least one processor is configured to execute the computer programs or instructions in the memory.

[0121] Optionally, the apparatus further comprises a communication interface coupled to the processor, configured to input information to the processor, or output information in the processor.

[0122] In a sixth aspect, a computer readable storage medium is provided, which stores program codes for executing a device, and the program codes comprise instructions for performing the method in any possible implementation of the first aspect and the second aspect.

[0123] In a seventh aspect, a computer program product containing instructions which, when the computer program product runs on a computer, enables the computer to perform the method in any possible implementation of the first aspect and the second aspect.

[0124] In an eighth aspect, a chip is provided, which comprises a processor and a communication interface, and the processor reads instructions on a memory through the communication interface, and performs the method provided in any implementation of the first aspect and the second aspect.

[0125] Optionally, the chip is a modem chip, also referred to as a baseband chip, or a SoC chip or a SIP chip containing a modem core.

[0126] Optionally, as an implementation form, the chip further comprises a memory, the memory storing a computer program or instructions, and the processor is configured to execute the computer program or instructions on the memory, and when the computer program or instructions are executed, the processor is configured to execute the method provided in any of the implementation forms of the first aspect and the second aspect.

[0127] In a ninth aspect, a computer program product containing instructions is provided, which, when executed on a computer, causes the computer to execute the method provided in any of the implementation forms of the first aspect and the second aspect.

[0128] In a tenth aspect, a communication system is provided, comprising the terminal device and the network device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0129] FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;

[0130] FIG. 2 is a schematic diagram of another wireless communication system to which embodiments of the present application are applicable;

[0131] FIG. 3 is a schematic diagram of SRS transmission provided by an embodiment of the present application;

[0132] FIG. 4 is a schematic diagram of the relationship between the number of combs, comb offset and subcarriers provided by an embodiment of the present application;

[0133] FIG. 5 is a schematic diagram of frequency hopping transmission of SRS provided by an embodiment of the present application;

[0134] FIG. 6 is a schematic diagram of the frequency hopping characteristics within a time slot provided by an embodiment of the present application;

[0135] FIG. 7 is a schematic diagram of the frequency hopping characteristics between time slots provided by an embodiment of the present application;

[0136] FIG. 8 is a schematic flowchart of a signal transmission method provided by an embodiment of the present application;

[0137] FIG. 9 is a schematic flowchart of another signal transmission method provided by an embodiment of the present application;

[0138] FIG. 10 is a schematic diagram of a communication apparatus provided by an embodiment of the present application;

[0139] FIG. 11 is a schematic diagram of another communication apparatus provided by an embodiment of the present application;

[0140] FIG. 12 is a schematic diagram of a chip system provided by an embodiment of the present application;

[0141] FIG. 13 is a schematic diagram of another communication apparatus provided in an embodiment of the present application. DETAILED DESCRIPTION

[0142] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0143] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) or new radio (NR) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, and the like. The technical solutions provided in the present application can also be applied to future communication systems. The technical solutions provided in the present application can also 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 the present application can also be applied to low frequency scenarios, high frequency scenarios, terahertz, and the like.

[0144] The technical solutions provided in the present 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 a terminal device. The satellite base station provides communication services for the terminal device. The satellite base station can also communicate with a base station. The satellite can act as a base station or a terminal device. The satellite can refer to a drone, a hot air balloon, a low earth orbit satellite, a medium earth orbit satellite, a high earth orbit satellite, and the like. The satellite can also refer to a non-ground base station or a non-ground device, and the like.

[0145] A device in a communication system can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, and the like. The device can be replaced by an entity, a network entity, a network element, a communication device, a communication module, a node, a communication node, and the like. The present disclosure describes the device as an example. For example, the communication system can include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device.

[0146] The terminal device in the embodiments of the present application can be a device or module with corresponding communication functions for accessing the above-mentioned communication system. The terminal device can include various devices with wireless communication functions, which can be used to connect people, things, machines, etc. The terminal device can be widely used 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, remote medical treatment, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city UAV, robot, 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. The terminal device can be a user equipment (UE) of the 3rd generation partnership project (3GPP) standard, a terminal, a fixed device, a mobile station device or a mobile device, a subscriber unit, a handheld device, a vehicle-mounted device, a wearable device, a cellular phone, a smart phone, a SIP phone, a wireless data card, a personal digital assistant (PDA), a computer, a tablet computer, a notebook computer, a wireless modem, a handset, a laptop computer, a computer with wireless transceiver function, a smart book, a vehicle, a satellite, a global positioning system (GPS) device, a target tracking device, an aircraft (such as a drone, a helicopter, a multi-copter, a quad-copter, or an airplane, etc.), a ship, a remote control device, a smart home device, an industrial device, a transport vehicle with wireless communication function, a communication module, a road side unit (RSU) with terminal function, or a device built-in the above-mentioned device (such as a communication module, a modem or a chip in the above-mentioned device, etc.), or other processing devices connected to the wireless modem. For the convenience of description, the terminal device will be described as an example of a terminal or UE hereinafter.

[0147] It should be understood that in some scenarios, the UE can also be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X, D2D or P2P scenarios, etc.

[0148] In embodiments of the present application, the apparatus for implementing the function of the terminal device, i.e., the terminal apparatus, can be a terminal device or an apparatus capable of supporting the terminal device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the terminal device. In embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the apparatus.

[0149] The network device in embodiments of the present application can be a device or module with a corresponding communication function. The network device can be a device for communicating with a terminal device, and the network device can also be referred to as an access network device or a radio access network device, such as a network device, which can be a base station. The network device in embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmission point (transmit / receive point or transmission reception point, TRP), transmission point, primary station, secondary station, multi-standard radio (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. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip for being disposed in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future communication network, a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. Embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0150] A base station can be fixed, or mobile. For example, a helicopter or unmanned aerial vehicle can be configured to function as a mobile base station, one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or unmanned aerial vehicle can be configured to function as a device that communicates with another base station.

[0151] In some deployments, the network device mentioned by embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0152] In some deployments, a plurality of RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or a radio unit (RU) (or radio frequency unit), etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU or an RRH.

[0153] In some deployments, the CU is a logical node that hosts 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 device. The CU connects with network nodes such as a core network over some interfaces, which can be an E2 interface or the like. Optionally, the CU has some of the functionality of the core network. The CU (e.g., PDCP layer and higher) connects with the DU (e.g., radio link control (RLC) layer and lower) over some interfaces, which can be an Fl interface or the like. In some examples, the interfaces (e.g., Fl 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 transfer, etc.). The Fl application protocol (FlAP) is an application protocol for the Fl interface, which defines, in some examples, signaling procedures for the Fl. The Fl interface supports a control plane (Fl-C), a user plane (Fl-U).

[0154] In some deployments, a CU can be split into a CU-CP and a CU-UP. The CU-CP is a logical node that carries the control plane part of PDCP (PDCP-C) layer and RRC layer, and is used to implement the control plane function of the CU. The CU-CP can interact with a network element in the core network that is used to implement the control plane function. The network element in the core network that is used to implement the control plane function can be an access and mobility function network element. The CU-UP is a logical node that carries the user plane part of PDCP (PDCP-U) layer and SDAP layer, and is used to implement the user plane function of the CU. The CU-UP can interact with a network element in the core network that is used to implement the user plane function. The network element in the core network that is used to implement the user plane function. The above configurations of the CU and the DU are merely examples, and the CU and the DU can have other functions according to needs. For example, the CU or the DU can be configured to have more protocol layer functions, or the CU or the DU can be configured to have partial processing functions of the protocol layers. For example, partial functions of the RLC layer and functions of the protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of the protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to service types or other system requirements. For example, functions that need to meet a relatively short delay requirement in processing time are arranged in the DU, and functions that do not need to meet the delay requirement are arranged in the CU.

[0155] In some deployments, a DU is a logical node that carries an RLC layer, a medium access control (MAC) layer, a higher physical (Higher PHY) layer, and other functions. In some examples, a DU can control at least one RU. The DU is connected to the RU through some interfaces, which can be a front-haul interface. In some examples, the Higher PHY layer includes part of the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and other processing functions.

[0156] In some deployments, a RU is a logical node that hosts lower physical layer (Lower PHY) and radio frequency (RF) processing. In some examples, a RU can be a TRP or a RRH or other similar functional entity. In some examples, a Low-PHY includes portions of PHY processing such as fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, and other processing functions. A RU communicates with one or more UEs over a wireless link.

[0157] A DU and a RU can or can not be co-located. A DU and a RU exchange control plane and user plane information over a fronthaul link via a lower-layer split-control, user and synchronization (LLS-CUS) interface. The LLS-CUS can include interfaces and interfaces that provide control plane and user plane, respectively. In some examples, the control plane refers to real-time control between a DU and a RU. A DU and a RU have an interface of a fronthaul link (e.g., referred to as a LLS-M interface) to exchange management information, and the management plane (M-Plane) refers to non-real-time management operations between a DU and a RU.

[0158] A DU and a RU can cooperate to collectively implement the functionality of a PHY layer. A DU can be connected to one or more RUs. The functionality that a DU and a RU have can be configured in multiple ways according to design. For example, a DU is configured to implement baseband functionality and a RU is configured to implement mid- RF functionality. As another example, a DU is configured to implement high layer functionality in a PHY layer and a RU is configured to implement low layer functionality in the PHY layer or to implement the low layer functionality and RF functionality. The high layer functionality in a PHY layer can include a portion of functionality of a PHY layer that is closer to a MAC layer, and the low layer functionality in a PHY layer can include another portion of functionality of a PHY layer that is closer to a mid-RF side.

[0159] In one possible design, a processing unit in a BBU that implements baseband functionality is referred to as a base band high (BBH) unit, and a processing unit in a RRU / AAU / RRH that implements baseband functionality is referred to as a base band low (BBL) unit.

[0160] The CU (or CU-CP and CU-UP), DU, or RU can also have different names in different systems, but those skilled in the art can understand their meanings. For example, the radio access network can also be an open radio access network (O-RAN) architecture, in which the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CUs (or CU-CPs, CU-UPs), DUs, and RUs in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0161] In the embodiments of the present application, the device for implementing the function of the network device can be a network device, or a device capable of supporting the network device to implement the function, such as a chip system or a chip or a circuit or a communication module (i.e., a communication module performing a communication function), which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In addition, program instructions for performing corresponding communication functions can also be configured in the device. In the embodiments of the present application, only the device for implementing the function of the network device is taken as an example for description, and the scheme of the embodiments of the present application is not limited.

[0162] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, balloons, and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or software functions running on special-purpose hardware, general-purpose hardware, such as virtualized functions instantiated on a platform (e.g., a cloud platform), or entities including special-purpose or general-purpose hardware devices and software functions. The specific forms of the terminal device and the network device are not limited in the present application.

[0163] First, a communication system suitable for the embodiments of the present application is briefly introduced.

[0164] Exemplarily, FIG. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable. As shown in FIG. 1, the wireless communication system includes a radio access network 100. The radio access network 100 can be a future (for example, a future communication system) radio access network, or a legacy (for example, a 5G, 4G, 3G or 2G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the radio access network 100. Network elements in the wireless communication system are connected through an interface (for example, a next generation interface (NG), Xn), or an air interface.

[0165] FIG. 1 is only a schematic diagram. Other devices in the wireless communication system can also be included, such as core network (CN) devices, wireless relay devices, and / or wireless backhaul devices, etc., which are not shown in FIG. 1.

[0166] Exemplarily, FIG. 2 is a schematic diagram of another wireless communication system to which embodiments of the present application are applicable. As shown in FIG. 2, the wireless communication system can include core network devices, access network devices (such as RANs), terminal devices, the access network devices communicate with the core network devices through backhaul links, and communicate with the terminal devices through air interfaces. For example, a BBU in the access network device communicates with the core network through a backhaul link, and a RU in the access network device communicates with the terminal device through an air interface. The BBU can communicate with the RU through a front-haul link, and the BBU and the RU can be co-located or not co-located. In some deployments, the BBU includes at least one CU and at least one DU, and the CU and the DU can communicate through a mid-haul link.

[0167] FIG. 2 is only a schematic diagram. Other devices in the wireless communication system can also be included, which are not shown in FIG. 2.

[0168] In order to facilitate better understanding of the technical solutions of the present application, some related technologies related to the technical solutions of the present application are introduced.

[0169] 1. Reference signal (RS)

[0170] Reference signals are also called pilot signals. In a communication system, it is necessary to transmit and receive data, acquire system synchronization and feedback channel information, estimate uplink or downlink channels. Channel estimation refers to the process of reconstructing or recovering received signals to compensate for signal distortion caused by channel fading and noise generated by fading. It uses reference signals known by the transmitter and receiver to detect time and frequency domain changes of the channel. The above-mentioned reference signals are also called reference signals, which are distributed in different resource elements (REs) in the time-frequency two-dimensional space within the orthogonal frequency division multiplexing (OFDM) symbol, and have known amplitude and phase.

[0171] At the physical layer, uplink communication can include transmission of uplink physical channels and uplink signals. Among them, the uplink physical channel includes a random access channel (PRACH), an uplink control channel (PUCCH), an uplink data channel (PUSCH), etc., and the uplink signal includes a channel sounding signal (SRS), an uplink control channel demodulation reference signal (PUCCH-DMRS), an uplink data channel demodulation reference signal (PUSCH-DMRS), a phase tracking reference signal (PTRS), an uplink positioning reference signal (uplink positioning RS), etc.

[0172] At the physical layer, downlink communication can include transmission of downlink physical channels and downlink signals. Among them, the downlink physical channels include a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), etc., and the downlink signals include a primary synchronization signal (PSS) / secondary synchronization signal (SSS), a PDCCH demodulation reference signal (PDCCH-DMRS), a PDSCH demodulation reference signal (PDSCH-DMRS), a PTRS, a channel state information reference signal (CSI-RS), a cell reference signal (CRS), a tracking reference signal (TRS), a positioning RS, etc.

[0173] 2. Antenna port

[0174] An antenna port is a logical concept, and one antenna port does not have a direct correspondence with one physical antenna. An antenna port is usually associated with a reference signal, and its meaning can be understood as a transceiving interface on the channel experienced by the reference signal. Therefore, in some cases, an antenna port can also be referred to as a reference signal port or a pilot port.

[0175] For a low-frequency system, one antenna port can correspond to one or more antenna elements, and these elements jointly transmit the reference signal, and the receiving end can treat them as a whole and does not need to distinguish these elements. For a high-frequency system, an antenna port can correspond to a beam, and similarly, the receiving end only needs to regard the beam as an interface and does not need to distinguish each element.

[0176] In the embodiments of the present application, a plurality of ports contained in one sounding reference signal resource can be referred to as sounding reference signal ports, or also referred to as antenna ports.

[0177] 3. Sounding reference signal (SRS)

[0178] SRS is an uplink channel sounding signal, which is sent by a terminal and received by a network device. The sending method of SRS, including time-frequency resources, sending beams, sending power, etc., is configured by the network device for the terminal. In the protocol framework of the third generation partnership project (3rd generation partnership project, 3GPP) release 15 (R15), the network device can configure one or more SRS resource sets for the terminal, and each SRS resource set has one or more SRS resources. In addition, in 3GPP R15, different SRS resource sets bear different functions, and R15 supports four functions: {beamManagement, codebook, nonCodebook, antennaSwitching, i.e., {beam management, codebook, non-codebook, antenna switching}. The network device informs the terminal of the function of the SRS resource set by configuring the usage of each set through RRC. In some places in this paper, the abbreviation {BM, CB, NCB, AS} will be used. When the usage is antennaSwitching, it is generally used to obtain complete uplink channel information. If the channel has uplink / downlink consistency, the channel for downlink transmission (or the precoding for downlink transmission) can be obtained through uplink channel measurement.

[0179] Next, the sending method of SRS is described in detail.

[0180] The network device can configure one or more SRS resource sets for the terminal device through an RRC configuration message or an RRC reconfiguration message, and the SRS resource set is used to allocate resources for SRS transmission. One SRS resource set contains one or more SRS resources, and an SRS resource contains time domain or frequency domain resources for SRS signal transmission. One SRS resource contains one or more antenna ports, and the antenna port is used for SRS signal transmission. That is, it can be understood that one SRS resource set indicates one or more time-frequency domain resources for SRS transmission and one or more antenna ports for SRS transmission.

[0181] Optionally, one SRS resource set contains a usage indication information (‘usage’), which is used to indicate the usage of the SRS resource set. Specifically, the usage can be antenna switching, or codebook, or non-codebook, or beam management.

[0182] Optionally, the network device can obtain the channel state information (CSI) of the downlink with reciprocity between the uplink and the downlink by receiving and measuring the SRS signals corresponding to the SRS resource set with usage of antenna switching. When the SRS is used for downlink data transmission weight measurement, and the number of downlink receiving antenna ports is greater than the number of uplink transmitting antenna ports, multiple SRS resources are configured for the user, different SRS resources use different antenna ports to send SRS signals, and the network device obtains the downlink channel measurement channel based on the SRS signals sent by the multiple SRS resources, and calculates the weight for downlink data transmission based on the uplink-downlink channel reciprocity assumption.

[0183] Exemplarily, FIG. 3 shows a schematic diagram of SRS transmission. As shown in FIG. 3, the terminal device 310 includes 4 antennas, and can send uplink signals to the network device 320 through 2 antennas and receive downlink signals from the network device 320 through 4 antennas. This scenario can be referred to as a 2-transmitter 4-receiver (2T4R) scenario.

[0184] The network device 320 can configure the terminal device 310 with one SRS resource set with usage of antenna switching (usage=antennaSwitching), which includes two SRS resources, and each SRS resource includes two SRS antenna ports. In this way, one SRS resource set includes 4 antenna ports, which can correspond to the 4 antennas one by one, and the 4 antenna ports are antenna port 1, antenna port 2, antenna port 3, and antenna port 4, respectively.

[0185] In the two SRS resources, the time-frequency resources allocated by the first SRS resource can be used to send SRS signals by using antenna port 1 and antenna port 2, and the time-frequency resources allocated by the second SRS resource can be used to send SRS signals by using antenna port 3 and antenna port 4. The network device 320 can perform SRS receiving and measuring through the time-frequency resources allocated by the two SRS resources, and calculate the downlink data transmission weight vector.

[0186] Optionally, the network device can obtain the uplink CSI by receiving and measuring the SRS signals corresponding to the SRS resource set for codebook, i.e., when the precoding mode of the uplink of the terminal device is codebook, the network device obtains the transmitted precoding matrix indicator (TPMI) by receiving and measuring the SRS signals, and indicates the terminal device to adopt the transmission precoding of the uplink by the TPMI and the SRS resource index (SRI).

[0187] Optionally, the network device can obtain the uplink CSI by receiving and measuring the SRS signals corresponding to the SRS resource set for non-codebook, i.e., when the precoding mode of the uplink of the terminal device is non-codebook, the network device obtains the uplink transmission precoding weight by receiving and measuring the SRS signals, and indicates the terminal device to adopt the transmission precoding of the uplink by the SRI.

[0188] Optionally, the network device can select the transceiving beams for the uplink and downlink transmission of the terminal device by receiving and measuring the SRS signals corresponding to the SRS resource set for beam management.

[0189] Optionally, the type of the SRS resource set can be configured as periodic, semi-static or aperiodic. The configuration information of the periodic SRS resource includes the period (e.g., 2ms, 5ms, 10ms, etc.) and the offset parameter, and after the network device configures the SRS resource by RRC signaling, the terminal device will send the SRS on the determined SRS resource according to the configuration information in the time slot of the specific period. The configuration information of the aperiodic SRS resource does not include the period and the offset parameter, but includes a time domain offset parameter K triggering the downlink control information (DCI) signaling of the SRS. When the terminal device receives the DCI signaling at the nth moment and the signaling indicates to trigger the SRS, it will send the SRS on the corresponding SRS resource at the nth+K moment, where K and n are positive integers.

[0190] Optionally, the SRS port (also known as antenna port) has a mapping relationship with the SRS time-frequency domain resource, i.e., the SRS information configuration indicates that a specific SRS port sends SRS on a specific SRS time-frequency domain resource. The SRS time domain resource can span N adjacent symbols within a time slot or occupy multiple symbols of different time slots.

[0191] Optionally, the SRS resource sets of different terminal devices can occupy the same time domain symbol or the same frequency domain bandwidth.

[0192] In a possible implementation, the SRS resource sets of different terminal devices can occupy the same time domain symbol and different frequency domain bandwidths.

[0193] Exemplarily, different terminal devices can occupy different subcarriers to transmit SRS. Instead of transmitting SRS on each subcarrier, a terminal device can select a specific subcarrier set based on a transmission comb value. For example, a terminal device can determine specific subcarriers occupied by using a configured transmission comb number and a comb offset.

[0194] Exemplarily, FIG. 4 shows a schematic diagram of a comb number, a comb offset, and a subcarrier relationship. As shown in FIG. 4, one resource block (RB) includes 12 subcarriers. When the comb number is 2, it means that any one of the two terminal devices occupies 6 subcarriers on one RB. The two terminal devices can be terminal device 1 and terminal device 2 respectively. The comb offset (combOffset) can include comb offset 0 or comb offset 1.

[0195] The network device can configure terminal device 1 with a comb number of 2 and a comb offset of comb offset 0 (combOffset=0). Terminal device 1 can occupy the 1st, 3rd, 5th, 7th, 9th, and 11th subcarriers to transmit SRS. The network device can configure terminal device 2 with a comb number of 2 and a comb offset of comb offset 1 (combOffset=1). Terminal device 2 can occupy the 2nd, 4th, 6th, 8th, 10th, and 12th subcarriers to transmit SRS.

[0196] When the comb number is configured to be greater than 1, different terminal devices are allowed to be frequency division multiplexed in the same OFDM symbol, that is, different terminal devices occupy different subcarriers of the same RB in the same OFDM symbol to transmit SRS. For example, a transmission comb spacing of 2 allows two groups of terminal devices to be frequency multiplexed with a single subcarrier offset between the two groups. The larger the comb number, the more users that can be multiplexed in the same OFDM symbol, but the fewer resource elements each user uses to transmit SRS, and in this case, the quality of SRS measurement can be reduced.

[0197] In another possible implementation, different terminal devices occupy the same resource elements and use different cyclically shifted base sequences to transmit SRS.

[0198] Exemplarily, each terminal device can be configured to send a base sequence (e.g., a "Zadoff-Chu sequence") with a specific cyclic shift as the SRS. That is, the base sequence can be selected, and different cyclic shifts are adopted to shift each SRS, the SRSs sent by the terminal device 1 with a first cyclic shift and the SRSs sent by the terminal device 2 with a second cyclic shift are orthogonal, so even if the terminal device 1 and the terminal device 2 occupy the same resource elements, the interference between the SRSs of the terminal device 1 and the terminal device 2 received by the network device is small. Wherein, the length of the base sequence can be equal to the number of resource elements allocated for the SRS, that is, related to the number of resource blocks allocated for the SRS and the number of combs used; the number of available cyclic shifts is related to the number of combs allocated for the SRS.

[0199] For example, when the number of combs = 2, the maximum number of available cyclic shifts = 8; when the number of combs = 4, the maximum number of available cyclic shifts = 12; when the number of combs = 8, the maximum number of available cyclic shifts = 6.

[0200] The different cyclic shifts described above can also be allocated to multiple antenna ports of the same terminal device to send SRS; for example, one SRS resource set of a terminal device contains 2 SRS resources, i.e., a first SRS resource and a 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 for the four antenna ports of the terminal device to send SRS.

[0201] Optionally, the terminal device can send SRS in a frequency hopping manner, that is, multiple SRSs sent by one terminal device can switch between different frequency bands. It should be understood that frequency hopping refers to switching the sending of multiple SRSs of the terminal device between different frequency bands in the frequency domain resource.

[0202] Exemplarily, when the transmission bandwidth of a single SRS sent by a terminal device is less than the maximum value of the SRS transmission bandwidth (for example, 272 resource blocks), the terminal device can configure the SRS resource using frequency hopping, and use different parts of the SRS transmission bandwidth to transmit SRS.

[0203] 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. In order to improve the accuracy of the channel estimation obtained by the network device based on the SRS, the bandwidth of the single SRS sent by the terminal device can be reduced to improve the frequency power spectral density of the SRS, thereby ensuring the uplink power of the single SRS and improving the accuracy of the channel state information obtained by the network device.

[0204] Exemplarily, FIG. 5 is a schematic diagram of frequency hopping transmission of SRS. FIG. 5 shows a schematic diagram of single-bandwidth SRS transmission, 2-time sub-band frequency hopping SRS transmission, and 4-time sub-band frequency hopping SRS transmission. In the multiple-time sub-band frequency hopping SRS transmission process, the frequency domain resource position of each SRS frequency hopping transmission is random, and the sequence of each SRS frequency hopping transmission is independent.

[0205] In the frequency domain, the SRS transmission can cover the downlink transmission bandwidth. There can be multiple possible implementation manners.

[0206] In one possible implementation manner, the SRS transmission can cover a wideband SRS, that is, using one SRS transmission, covering the entire frequency band.

[0207] In another possible implementation manner, the SRS transmission can cover a narrowband SRS, that is, multiple SRS transmissions cover the entire frequency band through frequency hopping. The narrowband SRS can concentrate the available transmission power in a narrower frequency range, improving the quality of channel estimation.

[0208] In the time domain, the SRS can support transmission in a frequency hopping manner, and the specific frequency hopping characteristics can be determined by parameters in the time domain and the frequency domain.

[0209] In the time domain, the SRS can occupy Ns={1, 2, 4} symbols in a slot, and the repetition factor R={1, 2, 4}, and R<=Ns. The repetition factor refers to repeating R times on each symbol, and the repetition factor can also be referred to as a repetition parameter, which is not limited in the embodiments of the present application.

[0210] R is used for the SRS frequency hopping characteristics of different symbols in a slot, when R=Ns, the frequency hopping transmission in a slot is not supported; when R=1, Ns=2, 4, the frequency hopping transmission of SRS in a slot is supported, and the frequency hopping is specifically in units of one OFDM symbol; when R=2, Ns=4, the frequency hopping transmission of SRS in a slot is supported, and the frequency hopping is specifically in units of a pair of OFDM symbols (i.e., 2 OFDM symbols).

[0211] Exemplarily, FIG. 6 shows a schematic diagram of frequency hopping characteristics in a slot. As shown in a of FIG. 6, when R=1, Ns=2, the SRS occupies 2 symbols in the time domain, and the frequency hopping is in units of one OFDM symbol, and the frequency hopping transmission in a slot is supported. As shown in b of FIG. 6, when R=1, Ns=4, the SRS occupies 4 symbols in the time domain, and the frequency hopping is in units of one OFDM symbol, and the frequency hopping transmission in a slot is supported. As shown in c of FIG. 6, when R=2, Ns=4, the SRS occupies 4 symbols in the time domain, and the frequency hopping is in units of two OFDM symbols, and the frequency hopping transmission in a slot is supported.

[0212] Wherein, for periodic SRS and semi-persistent SRS, corresponding periodicity and time domain offset parameters need to be configured. Periodic SRS and semi-persistent SRS can be transmitted in a frequency hopping manner within a slot, or in a frequency hopping manner between slots (i.e. according to the periodicity of SRS). Non-periodic SRS frequency hopping can only be performed within a slot (i.e. all hops are completed once triggered).

[0213] R is also used for SRS frequency hopping characteristics of different symbols between slots.

[0214] Exemplarily, FIG. 7 shows a schematic diagram of inter-slot frequency hopping characteristics. As shown in a of FIG. 7, when R = Ns = 1, the SRS occupies 1 symbol in each slot and is transmitted in a frequency hopping manner between different slots. As shown in b of FIG. 7, when R = 1, Ns = 2, the SRS occupies 2 symbols in each slot and hops in a unit of one OFDM symbol within each slot. As shown in c of FIG. 7, when R = 2, Ns = 2, the SRS occupies 2 symbols in each slot and hops in a unit of a pair of OFDM symbols within each slot. As shown in d of FIG. 7, when R = 1, Ns = 4, the SRS occupies 4 symbols in each slot and hops in a unit of one OFDM symbol within each slot. As shown in e of FIG. 7, when R = 2, Ns = 4, the SRS occupies 4 symbols in each slot and hops in a unit of a pair of OFDM symbols within each slot. As shown in f of FIG. 7, when R = 4, Ns = 4, the SRS occupies 4 symbols in each slot and hops in a unit of two pairs of OFDM symbols within each slot.

[0215] In frequency domain: the network device can configure the SRS resource for the terminal device through RRC signaling, and the RRC signaling can indicate the number of ports contained in the SRS resource, the frequency domain position and time domain position occupied by the SRS resource, the period used, the comb, the cyclic shift value, the sequence identification (ID) and the like. Wherein, the frequency domain position of the SRS resource is determined by a set of frequency domain parameters in the RRC signaling (in the existing 3GPP protocol, the frequency domain parameters can include n RRC , n Shift , B SRS , C SRS , b hop ), and the terminal device can determine the bandwidth and the starting position of the frequency domain occupied by the SRS through these frequency domain parameters and the rules predetermined by the protocol. Wherein, b hop may also be expressed as b hopping , which is not limited in the embodiments of the present application.

[0216] Wherein, C SRS is an index number of the cell-specific SRS bandwidth configuration, and B SRSConfigure 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).

[0217] 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.

[0218] 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 gop =0, C SRS =9, by looking up Table 1, we can determine m SRS,b′ =32.

[0219] 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.

[0220] In one example, the SRS frequency hopping characteristic can be determined by b hop and B SRS The configuration is determined jointly. When b hop ≥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.

[0221] When b hop SRS ​In this case, the terminal device enables the frequency hopping manner. That is, the terminal device transmits the SRS in the frequency hopping manner. It should be understood that in the case of transmitting the SRS in the frequency hopping manner, the SRS transmitted by the terminal device each time only covers a part (that is, one frequency hopping sub-band) of the configured bandwidth of the SRS resource, and the terminal device transmits the SRS multiple times in one frequency hopping period to cover the entire configured bandwidth of the SRS resource.

[0222] For example, for a 16RB bandwidth, the SRS of 16RB can be transmitted by single transmission, or the SRS of 8RB can be transmitted by 2 times of frequency hopping, or the SRS of 4RB can be transmitted by 4 times of frequency hopping. The specific frequency hopping pattern is defined in advance by the protocol. When the total bandwidth of the SRS of the user and the frequency hopping bandwidth are the same, only the same frequency hopping pattern can be used. When multi-level frequency hopping is used, the frequency band of the upper level is always jumped first, and then the frequency band of the lower level is jumped. For example, for 4 times of sub-band frequency hopping, 16RB is first divided into 2 8RBs, and then the 8RBs are divided into 2 4RBs. The first two times of transmission are performed on the same 4RB of the 2 8RBs, and the last two times of transmission are performed on another 4RB of the 2 8RBs.

[0223] Table 1

[0224] In the NR protocol, the SRS can be used for uplink CSI acquisition based on codebook or non-codebook transmission, channel measurement for downlink data transmission weight calculation, and uplink beam management. The SRS configured by the network device can be divided into two levels of resource set (Resource Set) and resource (Resource). At present, multiple SRS resources in the same resource set are configured with the same transmission power and frequency domain bandwidth, that is, when the terminal device transmits multiple SRSs through multiple SRS resources in the same resource set, the same transmission power and frequency domain bandwidth are used. After receiving multiple SRSs, the network device can perform channel estimation.

[0225] The same transmission power and frequency domain resource of different SRSs result in different signal strengths of different SRSs received by the network device, and the situation that the channel estimation accuracy of the SRS is low occurs.

[0226] In some examples, when the channel quality of the ports transmitting different SRSs is different, the channel estimation accuracy measured by different SRSs is different, resulting in the situation that the channel estimation accuracy of the SRS is low. For example, the port with poor channel quality can be referred to as a weak port, and the port with strong channel quality can be referred to as a strong port. The weak port will affect the signal quality of the SRS and reduce the channel accuracy. In the case of transmitting the same power, the bandwidth used by the strong port is smaller than the bandwidth used by the weak port, which will cause bandwidth waste and lead to channel aging.

[0227] Therefore, the embodiments of the present application provide a signal transmission method and a transmission device. When multiple SRSs are transmitted through multiple SRS resources in the same resource set, different transmission powers and / or different frequency domain bandwidths are used. In this way, different SRSs are configured with different transmission powers and / or different frequency domain bandwidths, which is beneficial to reduce the probability that the channel estimation accuracies of different SRSs are different, and further improve the channel estimation accuracy of the SRS.

[0228] Before introducing the scheme of the embodiments of the present application, the following points are explained.

[0229] (1) In the embodiments of the present application, "indication" can include direct indication, indirect indication, explicit indication, and implicit indication. When it is described that certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0230] In the embodiments of the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be indicated only in part, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, a protocol), thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be transmitted as a whole, or can be transmitted separately as multiple sub-information, and the transmission period and / or transmission opportunity of the sub-information can be the same or different.

[0231] (2) In the embodiments of the present application, "transmission" and "reception" represent the direction of signal transmission. For example, "transmitting information to XX" can be understood as that the destination of the information is XX, which can include direct transmission through the air interface, or indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct reception from YY through the air interface, or indirect reception from YY through the air interface from other units or modules. "Transmission" can also be understood as "output" of a chip interface, and "reception" can also be understood as "input" of a chip interface. In other words, transmission and reception can be carried out between devices, for example, between network devices and terminal devices, or can be carried out within a device, for example, between components, modules, chips, software modules or hardware modules in a device through a bus, wire or interface.

[0232] (3) In each of the embodiments of the present application, the terms and / or descriptions among different embodiments have consistency and can refer to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0233] (4) In the embodiments of the present application, “first”, “second”, and “#1”, “#2”, and “#n1”, “#n2”, etc. are only for convenience of description and are used to distinguish objects, and are not used to limit the scope of the embodiments of the present application. They are not used to describe the order or sequence of features. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe solutions other than the embodiments of the present application.

[0234] (5) In the embodiments of the present application, “predefined” can mean standard protocol predefined, or can also mean pre-agreed or pre-negotiated between devices. In the embodiments of the present application, “protocol” can refer to a standard protocol in the field of communication, which can include 5G protocol, NR protocol and related protocols applied in future communication systems, and the embodiments of the present application do not limit it. “Predefined” can include predefinition. For example, protocol definition. “Preconfigured” can be implemented by pre-saving corresponding codes, tables or other ways that can be used to indicate related information in the device, and the embodiments of the present application do not limit its implementation, for example.

[0235] (6) In the embodiments of the present application, the words “exemplarily”, “such as” and the like are used to represent examples, illustrations or descriptions. Any embodiment or design scheme described as “example” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word “example” is intended to present the concept in a specific way. In the embodiments of the present application, “of”, “corresponding” and “corresponding” can be used interchangeably at times, and it should be pointed out that when their differences are not emphasized, the meanings they express are consistent.

[0236] The method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments provided by the embodiments of the present application can be applied in the communication system shown in FIG. 1, without limitation.

[0237] It should be understood that the embodiments of the present application can be applicable to the communication scenarios of the terminal-side communication apparatus and the network-side communication apparatus. Exemplarily, the network-side communication apparatus can include a network device, a CU or a DU in the network device, or a module (such as a circuit, a chip or a chip system, etc.) in the network device, or a logic node, a logic module or software capable of realizing all or part of the functions of the network device, and the terminal-side communication apparatus can include a terminal device, a communication module in the terminal device, or a circuit or a chip (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) responsible for the communication function in the terminal device, or a logic node, a logic module or software capable of realizing all or part of the functions of the terminal device. For ease of description, the following communication method is described taking the network device and the terminal device as the execution subjects. When the terminal-side communication apparatus is other nodes, chips, circuits or entities, or when the network-side communication apparatus is other nodes, chips, circuits or entities, the corresponding specific implementation manners are similar and will not be described herein.

[0238] It should also be understood that in the following embodiments, the terminal device and the network device are exemplarily described. The terminal device can be replaced by a component (such as a chip or a chip system or a circuit) of the terminal device, and the network device can be replaced by a component (such as a chip or a chip system or a circuit) of the network device.

[0239] Exemplarily, FIG. 8 shows a schematic flowchart of a signal transmission method provided by an embodiment of the present application. As shown in FIG. 8, the method can include the following steps:

[0240] S801, the terminal device sends a first reference signal to the network device, and correspondingly, the network device receives the first reference signal.

[0241] S802, the terminal device sends a second reference signal to the network device, and correspondingly, the network device receives the second reference signal, 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.

[0242] In an example, the reference signal can be the SRS described above. When the reference signal is the SRS, the first reference signal can also be referred to as the first SRS, and the second reference signal can also be referred to as the second SRS. The reference signal in the embodiments of the present application is exemplarily described taking the SRS as an example to introduce the technical solutions in the embodiments of the present application. Of course, the method provided by the embodiments of the present application can also be applicable to other reference signals, which will not be enumerated one by one herein.

[0243] 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, and the first SRS and the second SRS can belong to the same SRS resource set. Wherein, at least one of the frequency domain resources or the transmission power of the first SRS and the second SRS is different. The transmission power can refer to the frequency domain transmission power.

[0244] Optionally, the frequency domain resource can be a frequency domain bandwidth occupied by at least one SRS transmission; or the frequency domain resource is a number of frequency domain resource blocks occupied by at least one SRS transmission.

[0245] In an example, the frequency domain resource can be a frequency domain bandwidth occupied by a single SRS transmission; or the frequency domain resource is a number of frequency domain resource blocks occupied by a single SRS transmission.

[0246] In this way, there can be multiple possible cases, that is, the frequency domain resources of the first SRS and the second SRS can be different, or the transmission power of the first SRS and the second SRS is different, or the frequency domain resource and the transmission power of the first SRS are not the same.

[0247] The following will be described in detail:

[0248] The first case: 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 transmission power of the first SRS and the second SRS is the same; or the power spectrum density of the first SRS and the second SRS is different; or the frequency domain resources of the first SRS and the second SRS are in a multiple relationship; or the transmission power of the first SRS and the second SRS is different; or the power spectrum density of the first SRS and the second SRS is the same. Wherein, the power spectrum density can be understood as the transmitted frequency domain power spectrum density or the transmission power of the same frequency domain resource.

[0249] For example, the frequency domain resources of the first SRS and the second SRS are different, the transmission power of the first SRS and the second SRS is the same, and the power spectrum density of the first SRS and the second SRS is different.

[0250] The first SRS and the second SRS have different frequency domain resources, and the first SRS and the second SRS have different transmission powers. In this way, the power of each RB or each RE in the frequency domain is different, the power spectrum density in the frequency domain is different, and the ports with different channel qualities can be applicable. This is conducive to 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 good channel quality on the reference signal of other users. For example, the channel quality of the first SRS is poorer than the channel quality of the second SRS. At this time, the first SRS is transmitted by using a larger frequency hopping bandwidth X1, the second SRS is transmitted by using a smaller frequency hopping bandwidth X2, the time domain transmission power Y of the first SRS and the second SRS is the same, the frequency domain power spectrum density Y1 of the first SRS is smaller, and the frequency domain power spectrum density Y2 of the second SRS is larger. Wherein, X1 >= X2, Y1 <= Y2, X2*Y1 = X1*Y2.

[0251] For another example, the frequency domain resources of the first SRS and the second SRS are different, and the transmission powers of the first SRS and the second SRS are different.

[0252] The frequency domain resources of the first SRS and the second SRS are different, and the transmission powers of the first SRS and the second SRS are different. The ports with different channel qualities can be applicable, which is conducive to 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 good channel quality on the reference signal of other users.

[0253] Optionally, the power spectrum densities of the first SRS and the second SRS can be the same.

[0254] The frequency domain resources of the first SRS and the second SRS are different, and the transmission powers of the first SRS and the second SRS can be different in the case of the same power spectrum density. In this way, it is conducive to improving the accuracy of the function implementation, for example, improving the channel estimation accuracy.

[0255] For another 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 have a multiple relationship.

[0256] The frequency domain resources of the first SRS and the second SRS are different, and the ports with different channel qualities can be applicable. This is conducive to 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 good channel quality on the reference signal of other users. The frequency domain resources of the first SRS and the second SRS have a multiple relationship, which is conducive to simplifying the indication mode of the signaling and the specific implementation mode of the terminal side communication device.

[0257] 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.

[0258] 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 example, the transmission comb of the first SRS can be 2, then the first SRS can be transmitted with a subcarrier interval of one subcarrier between every two subcarriers. As shown in Figure 4 above, 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.

[0259] 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.

[0260] 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.

[0261] 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:

[0262] 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 This is the configured frequency domain spread factor.

[0263] 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.

[0264] In an example, the frequency hopping parameter can include one or more of B SRS , C SRS , and b hop . Embodiments of the present application are described by way of example with the frequency hopping parameter including B SRS , C SRS , and b hop . Other similar examples are not described here.

[0265] The frequency domain resources are different by B SRS , C SRS , and b hop . There are various possible implementation manners.

[0266] In one possible implementation manner, B SRS and C SRS of the first SRS and the second SRS are the same, and b hop is different. The smaller b hop is, the more frequency domain resources there are, and accordingly, the larger b hop is, the fewer frequency domain resources there are. In this way, it is beneficial to make the frequency domain resources of the first SRS and the second SRS different.

[0267] Exemplarily, according to Table 1, when C SRS = 63 and B RRS = 0, if b hop = 1 for the first SRS, it can represent that the frequency domain resources of the first SRS include 16 RBs, and if b hop = 2 for the second SRS, it can represent that the frequency domain resources of the second SRS include 8 RBs.

[0268] In this way, there is one difference in the frequency hopping parameter, and implementation is simple.

[0269] In another possible implementation manner, at least one of B SRS , C SRS , and b hop of the first SRS and the second SRS is different.

[0270] Exemplarily, the frequency domain resources are the frequency domain bandwidths occupied by single SRS transmission, and the total bandwidths for the first SRS transmission and the second SRS transmission can be the same or different. According to Table 1, if B SRS = 0, C SRS = 63, and b hop = 1 for the first SRS, it can represent that the total bandwidth for the first SRS transmission can be 272 RBs, and the bandwidth for single first SRS transmission can be 16 RBs. If B SRS = 0, C SRS = 34, and b hop = 1 for the first SRS, it can represent that the total bandwidth for the first SRS transmission can be 272 RBs, and the bandwidth for single first SRS transmission can be 68 RBs.When the first SRS repetition factor is equal to 1, it can be indicated that the total bandwidth of the second SRS transmission can be 136 RBs, and the single second SRS transmission bandwidth can be 4 RBs.

[0271] In this way, one or more differences can exist in the frequency hopping parameters, and the flexibility is stronger without limiting the different parameters.

[0272] Method three: The frequency domain resources of the first SRS and the second SRS are different, and different repetition factors can be used to realize the difference.

[0273] The smaller the repetition factor is, the fewer the number of SRS repetitions is, the smaller the gain of joint channel estimation of the receiving side of the SRS is, but the shorter the time for the reference signal to complete the full-bandwidth frequency hopping is. Correspondingly, the larger the repetition factor is, the more the number of SRS repetitions is, the larger the gain of joint channel estimation of the receiving side of the SRS is, but the longer the time for the reference signal to complete the full-bandwidth frequency hopping is.

[0274] In this way, different frequency domain resources are realized by different repetition factors, and the repetition factor can be flexibly adjusted according to network requirements and channel conditions, and the flexibility is stronger.

[0275] Method four: The frequency domain resources of the first SRS and the second SRS are different, and different frequency domain expansion factors can be used to realize the difference. The frequency domain expansion factor can be a number greater than 0. It should be noted that the frequency domain expansion factor is only an example of a name, and can also be referred to as a frequency weight, etc., which is not limited in the embodiments of the present application.

[0276] Different reference signals can be configured with different frequency domain expansion factors. The unit of the frequency domain expansion factor can be a linear value or a dB value. If the unit of the frequency domain expansion factor is a linear value, the frequency domain expansion factor can be a multiple relationship of the frequency domain resource of each reference signal on the basis of the original frequency domain resource. The frequency domain expansion factor greater than 1 indicates that the frequency domain resource is lifted or increased, and the frequency domain expansion factor less than 1 indicates that the frequency domain resource is reduced or decreased. The original frequency domain resource can also be referred to as a reference frequency domain resource, which is not limited in the present application. The frequency domain expansion factor can also be referred to as a frequency weight, etc., which is not limited in the present application.

[0277] For example, the frequency domain expansion factor of 0.5 indicates that half of the original frequency domain resource is used to transmit the reference signal corresponding to the frequency domain expansion factor, and the frequency domain expansion factor of 2 indicates that twice the original frequency domain resource is used to transmit the reference signal corresponding to the frequency domain expansion factor.

[0278] If the unit of the frequency domain expansion factor is a dB value, the terminal device can convert the dB value to a linear value based on a preset conversion relationship, and then calculate based on the calculation method of the linear value shown above.

[0279] 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.

[0280] In addition, different frequency domain spread factors can also result in different sequence lengths for the first SRS and the second SRS.

[0281] 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:

[0282] 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 for each resource block, K TC For the configured transmission comb, For the gth i Frequency domain spread factor of each SRS.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] Optionally, the gth iThe SRS count and the repeatability factor of an SRS can satisfy the following formula:

[0288] 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.

[0289] 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.

[0290] Optional, the gth i Each SRS can correspond to either the first SRS or the second SRS.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] For example, the first SRS and the second SRS have different transmission powers.

[0295] The different transmission powers of the first SRS and the second SRS can be applicable to ports with different channel qualities, which is conducive to 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 good channel quality on the reference signal of other users.

[0296] Optionally, the first SRS and the second SRS can have the same power spectral density.

[0297] The first SRS and the second SRS have different frequency domain resources, and in the case of the same power spectral density, the first SRS and the second SRS can have different transmission powers. In this way, it is conducive to improving the accuracy of function implementation, for example, improving the channel estimation accuracy.

[0298] For example, the first SRS and the second SRS have different transmission powers, and the transmission powers of the first SRS and the second SRS can have a multiple relationship.

[0299] The different transmission powers of the first SRS and the second SRS can be applicable to ports with different channel qualities, which is conducive to 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 good channel quality on the reference signal of other users. The transmission powers of the first SRS and the second SRS have a multiple relationship, which is simple to implement.

[0300] The different transmission powers of the first SRS and the second SRS can be achieved by one or more of the following: the first SRS and the second SRS have different power expansion factors, the power expansion factor being used to determine the transmission power; or the first SRS and the second SRS have different transmission power offsets, the transmission power offset being used to determine the transmission power; or the first SRS and the second SRS have different downlink loss estimation values, the downlink loss estimation value being used to determine the transmission power; or the first SRS and the second SRS have different frequency domain resources, the frequency domain resource being used to determine the transmission power.

[0301] For example, mode one: the first SRS and the second SRS have different transmission powers, which can be achieved by different power expansion factors.

[0302] Different SRSs can be configured with different power expansion factors. The unit of the power expansion factor can be a linear value or a dB value. If the unit of the power expansion factor is a linear value, the power expansion factor can be a multiple relationship of the transmission power of each reference signal superimposed on the basis of the original transmission power. Wherein, the power expansion factor greater than 1 indicates that the transmission power is raised or increased, and the power expansion factor less than 1 indicates that the transmission power is reduced or decreased. The original transmission power can also be referred to as the reference transmission power, which is not limited in the present application.

[0303] For example, the power expansion factor of 0.5 indicates that the reference signal corresponding to the power expansion factor is transmitted with half of the original power, and the power expansion factor of 2 indicates that the reference signal corresponding to the power expansion factor is transmitted with 2 times of the original power.

[0304] If the unit of the power expansion factor is a dB value, the power expansion factor can be a power value of the transmission power of each reference signal superimposed on the basis of the original transmission power.

[0305] For example, the power expansion factor of 10 indicates that the reference signal corresponding to the power expansion factor is transmitted with a power of 10 dB higher than the original power, and the power expansion factor of -5 indicates that the reference signal corresponding to the power expansion factor is transmitted with a power of 5 dB lower than the original power.

[0306] Optionally, different reference signals are associated with different power expansion factors, and the terminal device determines that the total transmission power of the first reference signal and the second reference signal is X. 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 reference signal transmission power for different power expansion factors.

[0307] For example, when the unit of the original transmission power of the terminal side communication device is different from the unit of the power expansion factor, the two need to be converted to the same unit, and then the actual transmission power is calculated. If the power expansion factor is a dB value, and the unit of the original transmission power X / 2 is also a dB, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 0.5+X / 2. The power expansion factor corresponding to the second reference signal is 2, and 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+2.5.

[0308] If the power expansion factor is a linear value, and the original transmission power X / 2 unit is also a linear value, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 0.5*X / 2; the power expansion factor corresponding to the second reference signal is 2, and 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.

[0309] If the power expansion factor is a linear value, and the original transmission power X / 2 unit is a dB value, the power expansion factor corresponding to the first reference signal is 0.5, and the actual transmission power of the first reference signal can be 10*log10(0.5)+X / 2; the power expansion factor corresponding to the second reference signal is 2, and 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 unit is dB, and the value is X+10*log10(0.5)+10*log10(2).

[0310] 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 backed off 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.

[0311] In this way, the transmission of the first SRS and the second SRS is realized by different power expansion factors, the power resources are realized by simple calculation, and the realization is simple.

[0312] Method two: the transmission power of the first SRS and the second SRS is different, which can be realized by different transmission power offsets.

[0313] Different SRSs can be configured with different transmission power offsets. The transmission power offset can be the difference between the transmission power of each SRS and the reference power, or the difference between the transmission power of each SRS and the transmission power of a certain SRS, or the SRSs can be sorted, and the difference between the transmission power of each SRS and the transmission power of the previous SRS.

[0314] Optionally, different SRSs are associated with different transmission power offsets, the terminal device determines that the total transmission power of the first reference signal and the second reference signal is X, and the same 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 reference signal transmission power for different transmission power offsets.

[0315] 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 and the unit of the transmission power offset are different, they are converted to the same unit, and the actual transmission power is calculated. If the transmission power offset is a dB value, and the original transmission power X / 2 unit is also a dB, the transmission power offset corresponding to the first reference signal is 0.5, and 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, and the actual transmission power of the second reference signal can be 2+X / 2; and the actual total transmission power of the first reference signal and the second reference signal can be X+2.5.

[0316] If the transmission power offset is a linear value, and the original transmission power X / 2 unit is also a linear value, the transmission power offset corresponding to the first reference signal is 0.5, and 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, and the actual transmission power of the second reference signal can be 2*X / 2; and 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 unit is a dB value, the transmission power offset corresponding to the first reference signal is 0.5, and 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, and the actual transmission power of the second reference signal can be 10*log10(2)+X / 2; and the actual total transmission power of the first reference signal and the second reference signal is a dB value, and the value is X+10*log10(0.5)+10*log10(2).

[0317] 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 off 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.

[0318] In addition, the transmission power of the first reference signal and the second reference signal can also be realized by a power expansion factor and a transmission power offset. In this case, the power expansion factor can be a linear value, and the transmission power offset can also be a linear value; or the power expansion factor can be a dB value, and the transmission power offset can also be a dB value; or the power expansion factor can be a linear value, and the transmission power offset can also be a dB value; or the power expansion factor can be a dB value, and the transmission power offset can also be a linear value. The specific implementation can refer to the above examples, which will not be described here.

[0319] In an example, the transmission power of the SRS can satisfy the following formula:

[0320] wherein b represents the activated uplink partial bandwidth, f represents the carrier, c represents the serving cell, q s represents the SRS resource set, q d represents the SRS resource index used for calculating the downlink path loss estimation value, l represents the SRS power control adjustment state index, P SRS,b,f,c (i, q s , l) represents the serving cell c, the carrier f, the activated uplink partial bandwidth b, the SRS power control adjustment state index l, the SRS resource set q s , the transmission power of the SRS at the ith transmission occasion, M SRS,b,f,c (i) represents the frequency domain resource occupied by the SRS at the ith transmission occasion, PL b,f,c (q d ) the serving cell c, the carrier f, the activated uplink partial bandwidth b, the SRS resource index q d , the downlink path loss estimation value of the SRS calculated, ∑ gi X(g i ) represents the transmission power offset of the g i th SRS, G represents the number of antenna ports used for transmitting the g i th SRS, P CMAX,f,c (i) represents the frequency domain maximum transmission power configured by the serving cell c, the carrier f in the ith SRS transmission occasion, P O_SRR,b,f,c (q s ) represents the p0 provided by the serving cell c, the carrier f, the activated uplink partial bandwidth b, the SRS resource set q s , alpha SRS,b,f,c (q s ) represents the alpha provided by the serving cell c, the carrier f, the activated uplink partial bandwidth b, the SRS resource set q s , and h b,f,c (i, l) represents the power adjustment value based on the SRS power control adjustment state index l of the serving cell c, the carrier f in the ith SRS transmission occasion, μ is related to the subcarrier spacing and has a corresponding relationship with the subcarrier spacing. For example, when the subcarrier spacing is 15 kHz, μ is 0; when the subcarrier spacing is 15 kHz, μ is 1.

[0321] Method three: the transmission powers of the first SRS and the second SRS are different, which can be realized by different downlink path loss estimation values.

[0322] The different SRSs are associated with the same or different path loss SRSs, different downlink path loss estimation values are estimated based on the path loss SRSs, and different transmission powers are determined for the different SRSs based on the downlink path loss estimation values; the method is applicable to ports with different channel qualities and is beneficial to improving the channel estimation accuracy of the port with poor channel quality and reducing the interference of the SRS transmitted by the port with good channel quality on the SRS of other users.

[0323] Optionally, the first port with strong channel quality corresponds to a smaller path loss estimation value, so that the terminal device determines a smaller transmission power for transmitting the first SRS corresponding to the first port with strong channel quality based on the smaller path loss estimation value, which is beneficial to reducing the interference of the first SRS corresponding to the first port with strong channel quality on the SRS of other users. The second port with weak channel quality corresponds to a larger path loss estimation value, so that the terminal device determines a larger transmission power for transmitting the second SRS corresponding to the second port with weak channel quality based on the larger path loss estimation value, which is beneficial to improving the channel estimation accuracy of the second SRS of the second port with weak channel quality.

[0324] The transmission powers of the first SRS and the second SRS are different and can be realized through different frequency domain resources. The transmission power can be related to the frequency domain resource, and different transmission powers can be obtained by setting different frequency domain resources.

[0325] Optionally, the different SRSs are associated with different frequency domain resources, and the terminal device determines different transmission powers for the different SRSs based on the frequency domain resources, which is applicable to ports with different channel qualities and is beneficial to improving the channel estimation accuracy of the port with poor channel quality and reducing the interference of the SRS transmitted by the port with good channel quality on the SRS of other users.

[0326] Optionally, the first SRS of the first port with strong channel quality corresponds to larger frequency domain resources, and the first SRS of the second port with weak channel quality corresponds to smaller frequency domain resources; the frequency domain resources can be frequency domain bandwidth, or frequency domain resource block number, or frequency domain resource element number. The terminal device determines the first transmission power based on the frequency domain resources of the first SRS, determines the second transmission power based on the frequency domain resources of the second reference signal, and then determines the maximum transmission power P CMAX,f,c (i) determining a third transmission power, and the first SRS and the second SRS both adopt the third transmission power. Since the frequency domain resources of the first SRS are larger than the frequency domain resources of the second SRS, the frequency domain power spectrum density of the first SRS is smaller than the frequency domain power spectrum density of the second SRS under the same transmission power, which is beneficial to improving the channel estimation accuracy of the second port with weak channel quality and reducing the interference of the SRS transmitted by the first port with strong channel quality on the SRS of other users.

[0327] In one example, the SRS transmit power and downlink path loss estimate satisfy at least one of the following formulas:

[0328] or,

[0329] or,

[0330] 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 determined by the terminal device, carrier f, active uplink bandwidth b, SRS power control adjustment status index l, and SRS resource set q. 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 g-th i The frequency domain resources occupied by each SRS 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 SRS resource index q determined by the terminal device. d Calculate the g-th i The estimated downlink path loss for 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.

[0331] 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.

[0332] Method 4: The first SRS and the second SRS have different transmission powers, which can be achieved through different frequency domain resources.

[0333] In one example, the SRS transmit power and frequency domain resources satisfy at least one of the following formulas:

[0334] or,

[0335] or,

[0336] Among them, M SRS,b,f,c (i,g i ) represents the g-th i The frequency domain resources occupied by each SRS during the i-th transmission, PL b,f,c (q d The serving cell c, carrier f, active uplink bandwidth b, and SRS resource index q determined by the terminal equipment. d The calculated downlink path loss estimate for SRS.

[0337] Transmission power can be related to frequency domain resources; different transmission powers can be obtained by setting different frequency domain resources.

[0338] 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.

[0339] In one example, the SRS transmit power, downlink path loss estimate, and frequency domain resources satisfy at least one of the following formulas:

[0340] or,

[0341] or,

[0342] S803, The network device acquires the first channel of the first reference signal and the second channel of the second reference signal.

[0343] 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.

[0344] Exemplarily, the number of antennas of the terminal device is 4, and the number of antennas of the network device is 128. At a first time, the terminal device transmits a first reference signal by using 2 antennas of the 4 antennas. At a second time, the terminal device transmits a second reference signal by using the other 2 antennas of the 4 antennas. The second time can be after the first time. The network device can estimate the first reference signal to obtain a channel H1 of 128*2, or a channel matrix H1 of 128*2. The network device can also estimate the second reference signal to obtain a channel H2 of 128*2, or a channel matrix H2 of 128*2.

[0345] In S804, the network device combines the first channel and the second channel to obtain a third channel.

[0346] The first channel obtained by the network device based on the first reference signal is H1, and the second channel obtained by the network device based on the second reference signal is H2. The network device needs to combine the first channel and the second channel to obtain a channel estimation value under a plurality of reference signal combinations on the terminal side, thereby guiding the calculation of a sending weight value of downlink transmission.

[0347] The network device combines the first channel and the second channel to obtain a third channel can include a plurality of possible implementation manners.

[0348] In a possible implementation manner, the sending power of the first reference signal and the second reference signal is the same, or the frequency domain power spectrum density is the same. The first channel obtained by the network device based on the first reference signal is H1, and the second channel obtained by the network device based on the second reference signal is H2. When the network device combines the first channel and the second channel, the network device can directly combine to obtain a third channel H, and the third channel H can be represented as: H=[H1 H2].

[0349] In another possible implementation manner, the sending power of the first reference signal and the second reference signal is different, or the frequency domain power spectrum density is different. The first channel obtained by the network device based on the first reference signal is H1, and the second channel obtained by the network device based on the second reference signal is H2. When the network device combines the first channel and the second channel, the network device first needs to adjust the first channel and the second channel based on a difference value of the sending power of the first reference signal and the second reference signal, or a difference value of the frequency domain power spectrum density, to align the sending power or the power spectrum density of the reference signals corresponding to the first channel and the second channel, and then combine the adjusted first channel and the second channel to obtain a third channel.

[0350] For example, the transmission power or the frequency domain power spectral density of the first reference signal is 0.5X, the transmission power or the frequency domain power spectral density of the second reference signal is X, and when the terminal device performs power spectral density alignment, one processing method is that the terminal device can take the transmission power or the frequency domain power spectral density of the first reference signal as a reference to adjust the second channel H2 of the second reference signal, and the adjusted second channel H2' = 0.5*H2. The third channel H = [H1 H2'] is obtained by combining the adjusted channels. Another processing method is that the terminal device can take the transmission power or the frequency domain power spectral density of the second reference signal as a reference to adjust the first channel H1 of the first reference signal, and the adjusted second channel H1' = 2*H2. The third channel H = [H1' H2] is obtained by combining the adjusted channels.

[0351] wherein it is assumed that the number of ports of the network device is N, the number of ports of the terminal device is 2, and the ports of the terminal device correspond to the first port and the second port respectively, the first reference signal is transmitted based on the first port, the second reference signal is transmitted based on the second port, the first channel H1 ∈ C N×1 obtained based on the first reference signal, the second channel H2 ∈ C N×1 obtained based on the first reference signal, and the third channel H ∈ C N×2 The signal transmission method provided in the embodiments of the present application is that in the same reference signal resource set, at least one of the frequency domain resources or the transmission power of different reference signals is different, which is beneficial to improving the channel estimation accuracy of the reference signal in the scenario where the signal strengths of different reference signals are different.

[0352] The characteristics of the time-frequency resources of the reference signal are described in detail in the above method, and the characteristics of the time domain resources of the reference signal will be introduced below.

[0353] In a possible implementation, the first reference signal and the second reference signal can occupy the same time domain resource. In other words, the first reference signal and the second reference signal can occupy the same symbol in the same time slot. In another way, the time domain resources of the first reference signal and the second reference signal are the same.

[0354] In this way, it is beneficial to more efficiently utilize the limited time domain resources and reduce the probability of resource waste.

[0355] Optionally, the first reference signal and the second reference signal can correspond to different reference signal resources in the same reference signal resource set. In other words, the first reference signal and the second reference signal can occupy different RBs in the same resource set.

[0356] In this way, 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 in the same reference signal resource set can be different: frequency hopping parameter of the reference signal, frequency domain resource of the reference signal, transmission power of the reference signal, transmission power offset of the reference signal, repetition factor of the reference signal, power spectrum density of the reference signal, transmission comb of the reference signal, frequency domain spreading factor of the reference signal, power spreading factor of the reference signal, or downlink loss estimation value of the reference signal.

[0357] Optionally, the first reference signal can correspond to a first reference signal resource, and the second reference signal can correspond to a second reference signal resource. The first reference signal resource and the second reference signal resource belong to the same reference signal resource set. The first reference signal resource and the second reference signal resource can satisfy one or more of the following: the index values of the first reference signal resource and the second reference signal resource in the same reference signal resource set are adjacent; or the first reference signal resource and the second reference signal resource include the same number of ports; or the first reference signal resource and the second reference signal resource are any two reference signal resources in the same reference signal resource set; or the first reference signal resource and the second reference signal resource include different numbers of ports.

[0358] For example, the terminal device supports x ports for simultaneous uplink transmission and y ports for simultaneous downlink reception. For SRS information configuration for antenna switching, the y ports are divided into k groups, and each group includes a certain number of ports. The ports in the same group can belong to the same reference signal resource or different reference signal resources. The number of ports included in different reference signal resources can be different or the same.

[0359] In one possible implementation, the first reference signal can correspond to a first reference signal resource, and the second reference signal can correspond to a second reference signal resource. The first reference signal resource and the second reference signal resource can have adjacent index values in the same reference signal resource set.

[0360] Exemplarily, in the same reference signal resource set, one or more reference signal resources occupying the same symbol, or different symbols, or adjacent symbols, or non-adjacent symbols can be defaulted or configured. For example, the first reference signal and the second reference signal can realize the function of antenna switching. The same reference signal resource set can include 3 reference signal resources, the first reference signal resource includes a first port configuration, the first port is used for sending the first reference signal, the second reference signal resource index value is adjacent to the first reference signal resource index value, and can be used for sending the second reference signal in the same time domain resource as the first reference signal. The third reference signal resource index value is not adjacent to the first reference signal resource index value, and can be used for sending the third reference signal in a different time domain resource from the first reference signal. The time domain resource of the reference signal sent by the third reference signal resource can be the same as or different from the time domain resource of the reference signal sent by the second reference signal resource, and the embodiment of the present application does not limit this. In addition, different time domain resources can be different time slots or different symbols in the same time slot. In another possible implementation, the plurality of reference signal resources in the same reference signal resource set include the same number of ports.

[0361] Exemplarily, the terminal device is 2T4R, supports 2 simultaneously sent ports in uplink, and supports 4 simultaneously received ports in downlink, and the terminal device completes the SRS sending of 4 ports through antenna switching. At this time, the same reference signal resource set can include 4 reference signal resources, which are 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 includes 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 simultaneously send 2 ports in uplink, the first reference signal and the second reference signal can occupy the same time domain resource, which can also be understood as occupying the same symbol in the same time slot; the frequency domain resource can 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 sent through antenna switching, and at this time, 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.

[0362] In another possible implementation, the at least two reference signal resources in the same reference signal resource set include different numbers of ports.

[0363] Exemplarily, the terminal device is 2T4R, supports that the number of ports that can be simultaneously sent in uplink is 2, and the number of ports that can be simultaneously received in downlink is 4, and the terminal device completes SRS sending of the 4 ports through antenna switching. At this time, the same reference signal resource set can include 3 reference signal resources, which are 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 case, the first reference signal resource contains a first port, the first port can be used to send a first reference signal, the third reference signal resource contains a second port, the second port can be used to send a second reference signal, the first reference signal and the second reference signal can occupy the same time domain resource, the second reference signal resource contains a third port and a fourth port, and can be used to send a third reference signal and a fourth reference signal, the third reference signal and the fourth reference signal occupy different time domain resources from the first reference signal and the second reference signal. In another case, the first reference signal resource contains a first port, the first port can be used to send a first reference signal, the second reference signal resource contains a second port and a third port, the second port can be used to send a second reference signal, and the third port can be used to send a third reference signal. The third reference signal and the second reference signal occupy different time domain resources from the first reference signal. The third reference signal resource contains a fourth port, and the fourth port can be used to send a fourth reference signal, and the fourth reference signal can occupy the same time domain resource as the first reference signal.

[0364] Optionally, the terminal device can send the first reference signal and the 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 the first port, and can send the second reference signal to the network device through the second port. It can be understood that the port can also be referred to as an antenna port, a reference signal port or a pilot port, and the embodiments of the present application do not limit this.

[0365] Exemplarily, in the example shown in the above FIG. 3, the terminal device is 2T4R, supports that the number of ports that can be simultaneously sent in uplink is 2, and the number of ports that can be simultaneously received in downlink is 4, and the terminal device completes SRS sending of the 4 ports through antenna switching. The first port can be the above antenna port 1 or antenna port 2, and the first reference signal can be the SRS signal sent by the first port. The second port can be the above antenna port 3 or antenna port 4, and the second reference signal can be the SRS signal sent by the second port.

[0366] In this way, the reference signals sent through different ports can correspond to different frequency domain resources and / or different sending powers, and in the case that the channel qualities of different ports are different, the channel estimation accuracy of the reference signal is improved.

[0367] In an example, the different ports can belong to different reference signal resources. In other words, a same reference signal resource set can include a plurality of reference signal resources, each of the plurality of reference signal resources can include one or more ports, and the port transmitting the first reference signal and the port transmitting the second reference signal can belong to different reference signal resources.

[0368] In an example, the different ports can belong to different groups. In other words, the terminal device can include a plurality of ports, the plurality of ports can be divided into a plurality of groups, each group can include one or more ports, and the port transmitting the first reference signal and the port transmitting the second reference signal can belong to different groups.

[0369] For example, in the example shown in FIG. 3, the terminal device can include 4 antenna ports, the 4 antenna ports can include 2 groups, the 1st group can include the antenna port 1 and the antenna port 2, and the 2nd group can include the antenna port 3 and the antenna port 4. The port transmitting the first reference signal can include the antenna port 1 and the antenna port 2, and the port transmitting the second reference signal can include the antenna port 3 and the antenna port 4. The ports transmitting different reference signals can belong to different groups.

[0370] In this way, the different ports are grouped, the ports in a same group correspond to a same frequency domain resource and a same transmission power, and the ports in different groups correspond to different frequency domain resources and / or different transmission powers. Compared with the different ports corresponding to different frequency domain resources and / or different transmission powers, the grouping of the different ports can reduce the complexity.

[0371] Optionally, the channel quality difference between the ports in different groups is large, and the channel quality difference between the ports in a same group is small. In other words, the plurality of ports can be grouped based on the channel quality, a port group with poor channel quality can be referred to as a weak port group, a weaker port group, a very weak port group, etc., and a port group with good channel quality can be referred to as a strong port group, a stronger port group, a very strong port group, etc. The number of specific groups can be 2, 3, 4, 5, etc., and the embodiments of the present application do not limit the number of specific groups.

[0372] In this way, the channel quality of the first port and the second port can be different. In the case of different channel qualities, the reference signals transmitted by the first port and the second port can use different frequency domain resources and / or different transmission powers, which can improve the channel estimation accuracy of the port with poor channel quality and reduce the interference of the reference signal transmitted by the port with good channel quality to the reference signals of other users.

[0373] The ports in the same group can belong to the same reference signal resource of the same reference signal resource set, and the ports in different groups belong to different reference signal resources of the same reference signal resource set. The frequency domain resources and transmission powers of the reference signals sent by the ports in the same group can be the same, and one of the frequency domain resources and transmission powers of the reference signals sent by the ports in different groups can be different.

[0374] In this way, there can be multiple possible cases, that is, the frequency domain resources and transmission powers of the reference signals sent by the ports in the same group can be the same, the frequency domain resources of the reference signals sent by the ports in different groups are different, and the transmission powers are the same. Or, the frequency domain resources and transmission powers of the reference signals sent by the ports in the same group can be the same, the frequency domain resources of the reference signals sent by the ports in different groups are the same, and the transmission powers are different. Or, the frequency domain resources and transmission powers of the reference signals sent by the ports in the same group can be the same, and the frequency domain resources and transmission powers of the reference signals sent by the ports in different groups are all different.

[0375] The following will take the SRS as an example to introduce the three cases in detail:

[0376] In a possible implementation, the frequency domain resources and transmission powers of the SRSs sent by the ports in the same group can be the same, the frequency domain resources of the SRSs sent by the ports in different groups are different, and the transmission powers are the same.

[0377] The different frequency domain resources of the SRSs sent by the ports in different groups can be implemented by one or more of a transmission comb, a frequency hopping parameter, a repetition factor, or a frequency domain spreading factor.

[0378] In an example, the different frequency domain resources of the SRSs sent by the ports in different groups can be implemented by configuring different frequency domain spreading factors for the ports in different groups. The weaker ports can be configured with smaller frequency domain spreading factors, and the stronger ports can be configured with larger frequency domain spreading factors.

[0379] Exemplarily, the ports in each group can be configured with a reference frequency domain resource and a frequency domain extension factor, and the product of the frequency domain extension factor and the reference frequency domain resource can be the frequency domain resource of the ports in each group. For example, the frequency domain extension factor of the ports in the first group by default is 1, and the network device can deliver the reference frequency domain resource to the terminal device through the high-layer parameter "b-SRS" configured by RRC, and deliver the frequency domain extension factors of the ports in other groups. The terminal device can determine the frequency domain resource of the ports in each group through the reference frequency domain resource and the frequency domain extension factor of the ports in each group. Since the frequency domain extension factors of the ports in each group are different, the frequency domain resources of the SRSs sent by the ports in each group are different. The weak port group can be configured with a smaller frequency domain extension factor, and the strong port group can be configured with a larger frequency domain extension factor. In this way, based on the ports in the first group by default, the frequency domain extension factors do not need to be configured for each port group, and the signaling is simple.

[0380] For another example, the network device can deliver the reference frequency domain resource to the terminal device through the high-layer parameter "b-SRS" configured by RRC, and deliver the frequency domain extension factors of the ports in each group. The terminal device can determine the frequency domain resource of the ports in each group through the reference frequency domain resource and the frequency domain extension factor of the ports in each group. Since the frequency domain extension factors of the ports in each group are different, the frequency domain resources of the SRSs sent by the ports in each group are different. The weak port group can be configured with a smaller frequency domain extension factor, and the strong port group can be configured with a larger frequency domain extension factor. In this way, the frequency domain extension factors can be configured for each port group, and the flexibility is stronger.

[0381] In addition, configuring different frequency domain extension factors for different groups of ports can also affect the SRS sequence length sent by different groups of ports. The SRS sequence length sent by each group of ports can satisfy the following formula:

[0382] In another example, the frequency domain resources of the SRSs sent by different groups of ports are different, which can be implemented through a frequency hopping parameter. The frequency hopping parameter can include one or more of B SRS , C SRS , and b hop .

[0383] For example, the network device can configure the same B SRS , C SRS for each group of ports of the terminal device, so that the total bandwidth of the SRSs sent by each group of ports is the same. The network device can also configure different b hop for each group of ports of the terminal device, so that the single SRS sending bandwidth of each group of ports is different. b hopThe value of b can be inversely proportional to the single SRS transmission bandwidth, b hop The smaller the b, the larger the single SRS transmission bandwidth, and correspondingly, b hop The larger the b, the smaller the single SRS transmission bandwidth. For example, from Table 1 above, C SRS = 63, B SRS = 0, and b hopping = 1 for the first group of ports indicates that the single SRS transmission bandwidth is 16 RBs, and b hopping = 2 for the second group of ports indicates that the single SRS transmission bandwidth is 8 RBs.

[0384] For another example, the network device can configure a set of frequency hopping parameters B SRS , C SRS , and b hop for each group of ports of the terminal device, the total bandwidth of the SRS transmitted by the ports of each group can be the same or different, and the single SRS transmission bandwidth of the ports of each group is different. For example, from Table 1 above, C SRS = 63, B SRS = 0, and b hopping = 1 for the first group of ports indicates that the total SRS transmission bandwidth of the first group of ports is 272 RBs, and the single SRS transmission bandwidth is 16 RBs, and C SRS = 34, B SRS = 0, and b hopping = 1 for the second group of ports indicates that the total SRS transmission bandwidth of the second group of ports is 136 RBs, and the single SRS transmission bandwidth is 4 RBs.

[0385] In yet another example, the frequency domain resources of the SRS transmitted by the ports of different groups are different, which can be implemented by configuring different repetition factors for the ports of different groups. Among them, the weaker ports can be configured with a larger repetition factor, which is beneficial to improve the SRS channel estimation accuracy, and the stronger ports can be configured with a smaller repetition factor, which is beneficial to shorten the time requirement of SRS full bandwidth transmission.

[0386] In addition, configuring different repetition factors for different groups of ports can affect the SRS counter transmitted by different groups of ports, so that the SRS counter transmitted by different groups of ports is different.

[0387] For example, the SRS counter transmitted by the ports of different groups and the repetition factor of the ports of different groups can satisfy the following formula:

[0388] wherein, n represents the number of slots in a system frame, n f represents the system frame number, T represents the slot number in a system frame, Toffset denotes a time slot offset value, T SRS denotes a time slot period, and l' denotes a symbol number, denotes a repetition factor of the SRS transmitted by the ports in the g i th group.

[0389] In another possible implementation, the frequency domain resources and transmission power of the SRS transmitted by the ports in the same group can be the same, and the frequency domain resources of the SRS transmitted by the ports in different groups are the same, and the transmission power is different.

[0390] In an example, the transmission power of the SRS transmitted by the ports in different groups is different, which can be implemented by configuring different power expansion factors for the ports in different groups. Among them, the weaker ports can be configured with a larger power expansion factor, and the stronger ports can be configured with a smaller power expansion factor.

[0391] For example, the ports in each group can be configured with a reference transmission power and a power expansion factor, and the product of the power expansion factor and the reference transmission power can be the transmission power of each group of ports. For example, the power expansion factor of the first group of ports is 1 by default, and the network device can issue the reference transmission power to the terminal device through the high-layer parameter "b-SRS" configured by RRC, and issue the power expansion factor of other groups of ports. The terminal device can determine the transmission power of each group of ports through the reference transmission power and the power expansion factor of each group of ports. Since the power expansion factors of each group of ports are different, the transmission power of the SRS transmitted by each group of ports is different. The weak port group can be configured with a larger power expansion factor, and the strong port group can be configured with a smaller power expansion factor. In this way, based on the default first group of ports, it is not necessary to configure a power expansion factor for each group of port groups, and the signaling is simple.

[0392] For another example, the network device can issue the reference transmission power to the terminal device through the high-layer parameter "b-SRS" configured by RRC, and issue the power expansion factor of each group of ports. The terminal device can determine the transmission power of each group of ports through the reference transmission power and the power expansion factor of each group of ports. Since the power expansion factors of each group of ports are different, the transmission power of the SRS transmitted by each group of ports is different. The weak port group can be configured with a larger power expansion factor, and the strong port group can be configured with a smaller power expansion factor. In this way, a power expansion factor can be configured for each group of port groups, and the flexibility is stronger.

[0393] Among them, the reference transmission power can satisfy the following formula:

[0394] In yet another possible implementation, the frequency domain resources and the transmission power of the SRSs sent by the ports in the same group can be the same, and the frequency domain resources and the transmission power of the SRSs sent by the ports in different groups are different.

[0395] The implementation in which the frequency domain resources and the transmission power of the SRSs sent by the ports in different groups are different can refer to the examples described above, and will not be described here again.

[0396] In the method described above, at least one of the frequency domain resources and the transmission power of the SRSs sent by the ports in different groups is different. In addition, the ports in different groups can correspond to different SRS resources, and the ports in the same group can correspond to the same SRS resource.

[0397] In addition, the ports in different groups can occupy the same time domain resource under one or more of the following conditions: the index values of the SRS resources corresponding to the ports in different groups in the same resource set are adjacent, or the number of ports included in the SRS resources corresponding to the ports in different groups is the same.

[0398] Exemplarily, the ports in different groups can occupy the same time domain resource under the condition that the index values of the corresponding SRS resources in the same resource set are adjacent. In the example shown in FIG. 3 described above, the four downlink antenna ports of the terminal device can be divided into three groups, and the three groups of ports can be a first group of ports, a second group of ports, and a third group of ports. The first group of ports can include antenna port 1, corresponding to the first SRS resource of the SRS resource set. The second group of ports can include antenna port 2, corresponding to the second SRS resource of the SRS resource set. The third group of ports can include antenna port 3 and antenna port 4, corresponding to the third SRS resource of the SRS resource set. The index values of the first SRS resource and the second SRS resource in the same SRS resource set are adjacent, so the ports included in the first SRS resource and the ports included in the second SRS resource can occupy the same time domain resource, that is, the SRSs sent by antenna port 1 and antenna port 2 can occupy the same time domain resource. The third SRS resource is not adjacent to the second SRS resource and the first SRS resource, so the ports included in the third SRS resource and the ports included in the second SRS resource can occupy different time domain resources, that is, different time slots or different symbols in the same time slot.

[0399] Exemplarily, the ports in different groups can occupy the same time domain resource in the case that the corresponding SRS resources include the same number of ports. In the example shown in FIG. 3, the four downlink antenna ports of the terminal device can be divided into three groups, which are the first group of ports, the second group of ports, and the third group of ports. The first group of ports can include antenna port 1, corresponding to the first SRS resource of the SRS resource set. The second group of ports can include antenna port 2, corresponding to the second SRS resource of the SRS resource set. The third group of ports can include antenna port 3 and antenna port 4, corresponding to the third SRS resource of the SRS resource set. The first SRS resource and the second SRS resource include the same number of ports, both of which are one, so the ports included in the first SRS resource and the ports included in the second SRS resource can occupy the same time domain resource, that is, the SRSs transmitted by antenna port 1 and antenna port 2 can occupy the same time domain resource.

[0400] The SRS can implement functions such as antenna switching, codebook, non-codebook, or beam management. When the SRS implements the function of antenna switching, the number of ports that can be simultaneously used by the terminal device when transmitting uplink signals can be x, and the number of ports that can be simultaneously used by the terminal device when receiving downlink signals can be y. The y ports can be divided into k1 groups, The ports in different groups in the k groups can occupy the same time domain resource in the case that one or more of the following conditions are met: the indexes of the SRS resources corresponding to the ports in different groups are adjacent in the same resource set, or the SRS resources corresponding to the ports in different groups include the same number of ports.

[0401] When the SRS implements the function of codebook or non-codebook, the number of ports that can be simultaneously used by the terminal device when transmitting uplink signals can be x. The x ports can be divided into k2 groups, k2>1, corresponding to k2 resources, and the ports included in the k2 resources can all occupy the same symbol in the same slot to transmit SRS.

[0402] In an example, when the SRS implements one of the functions of antenna switching, codebook, non-codebook, or beam management, each port of the multiple ports in the terminal device can correspond to an SRS resource, and different ports correspond to different SRS resources. The multiple SRS resources corresponding to the multiple ports belong to the same SRS resource set. The ports of the multiple SRS resources can occupy the same symbol in the same slot to transmit SRS, and the TPMI of the uplink data can be associated with the ports of the multiple SRS resources. That is, one port is a group of ports, and each port can occupy the same symbol in the same slot to transmit SRS.

[0403] In order to better understand the above method, the method is introduced below in conjunction with FIG. 9.

[0404] Exemplarily, FIG. 9 shows a schematic flowchart of another signal transmission method provided by the embodiments of the present application. As shown in FIG. 9, the method can include the following steps:

[0405] S901, the network device can send RRC configuration signaling to the terminal device, and the RRC configuration signaling can include SRS configuration information. The SRS configuration information can include an SRS sending period, an SRS resource set, an SRS resource included in the SRS resource set, a port included in the SRS resource, and information related to sending power, etc.

[0406] S902, the terminal device can send a first SRS through a first port.

[0407] S903, the terminal device can send a second SRS through a second port, the first SRS and the second SRS belong to the same SRS resource set, and at least one of the frequency domain resources or the sending power of the first SRS and the second SRS is different.

[0408] The first port and the second port can belong to different groups. The frequency domain resources and the sending power of the reference signals sent by the ports of different groups can be different in one aspect. The frequency domain resources can be the frequency domain bandwidth occupied by a single SRS sending, or the frequency domain resources can be the number of frequency domain resource blocks occupied by a single SRS sending.

[0409] If the first port and the second port send SRSs using the same sending power, since the frequency domain bandwidths of different ports are different, the power per RB or per RE of the frequency domain of different ports is different, that is, the power spectrum density of the frequency domain is different. When the network device combines the channels of multiple ports, it is necessary to align the frequency domain power spectrum densities of different ports. The difference value of the frequency domain power spectrum densities of the SRSs sent by different ports can be related to the single SRS sending bandwidth of the port. For example, the single SRS sending bandwidth of port 1 is X, and the corresponding frequency domain power spectrum density is linear value Y. The single SRS sending bandwidth of port 2 can be 2X, and the corresponding frequency domain power spectrum density can be linear value Y / 2.

[0410] If the first port and the second port send SRSs using different sending powers, since the frequency domain bandwidths of different ports are different, in order to ensure that the frequency domain power spectrum densities of the SRSs sent by each port are the same, the SRS sending powers of different ports are different. The difference value of the sending powers between different ports can be related to the single SRS sending bandwidth of the port. For example, the single SRS sending bandwidth of port 1 is X, the total time domain power of SRS sending is linear value Z, and the frequency domain power spectrum density of SRS sending is linear value Y. The single SRS sending bandwidth of port 2 is 2X, the total time domain power of SRS sending is linear value 2Z, and the frequency domain power spectrum density of SRS sending is linear value Y.

[0411] S904, the network device acquires a first channel of the first reference signal and a second channel of the second reference signal.

[0412] S905, the network device combines the first channel and the second channel to obtain a third channel.

[0413] S906, the network device implements any one of antenna switching, codebook, non-codebook, or beam management based on the third channel.

[0414] The network device can acquire a first channel estimation value based on the first reference signal, and can acquire a second channel estimation value based on the second reference signal, and combine the first channel estimation value and the second channel estimation value to obtain a weight vector of downlink data transmission, to implement any one of antenna switching, codebook, non-codebook, or beam management.

[0415] It can be understood that in the embodiments of the present application, the interaction between the terminal device and the network device is mainly taken as an example for illustrative description, and the present application is not limited thereto. The terminal device can be replaced by a receiving end device, and the receiving end device can be a terminal device or a network device. The network device can be replaced by a sending end device, and the sending end device can be a terminal device or a network device.

[0416] It can also be understood that some optional features in the embodiments of the present application can not depend on other features in some scenarios, or can be combined with other features in some scenarios, without limitation.

[0417] It can also be understood that the schemes in the embodiments of the present application can be reasonably combined, and the explanations or descriptions of various terms appearing in the embodiments can be mutually referenced or explained in various embodiments, without limitation.

[0418] It can also be understood that the methods and operations implemented by the devices (such as terminal devices and network devices) in the various method embodiments can also be implemented by components (such as chips or circuits) of the devices, without limitation.

[0419] The above describes the method provided by the embodiments of the present application in detail in combination with FIGS. 1 to 9. The following describes the apparatus provided by the embodiments of the present application in combination with FIGS. 10 to 13. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments described above, and will not be described here for brevity.

[0420] Fig. 10 is a schematic diagram of a communication apparatus 1000 according to an embodiment of the present application. The apparatus 1000 includes a processing unit 1010. The processing unit 1010 can be configured to perform processing, such as determining frequency domain resources and transmission power of a reference signal. The processing unit 1010 can be implemented by one or more processors. Specifically, the processor can include a modem chip, or a system on chip (SoC) chip or a SIP chip including a modem core. The apparatus 1000 also includes a transceiver unit 1020. The transceiver unit 1020 can be configured to implement corresponding communication functions. The transceiver unit 1020 can also be referred to as a communication interface or a communication unit.

[0421] Optionally, the apparatus 1000 can further include a storage unit. The storage unit can be configured to store instructions and / or data. The processing unit 1010 can read the instructions and / or data stored in the storage unit, so that the apparatus implements the foregoing method embodiments.

[0422] Optionally, the transceiver unit 1020 can include a receiving unit and / or a transmitting unit. The receiving unit can be configured to perform operations related to receiving, such as operations of receiving data or messages. The transmitting unit can be configured to perform operations related to transmitting, such as operations of transmitting data or messages.

[0423] In a first possible design, the apparatus 1000 can be a terminal device in the foregoing embodiments. The apparatus 1000 can implement steps or procedures corresponding to operations performed by the terminal device in the foregoing method embodiments. The transceiver unit 1020 can be configured to perform operations related to receiving and / or transmitting by the terminal device in the foregoing method embodiments, such as operations of transmitting and / or receiving data or messages. For example, the transceiver unit 1020 can be configured to perform S801 and S802 in the embodiment of Fig. 8. The processing unit 1010 can be configured to perform operations related to processing by the terminal device in the foregoing method embodiments, or operations other than receiving and / or transmitting, such as operations other than transmitting and / or receiving data or messages. For example, the processing unit 1010 can be configured to perform S803 and S804 in the embodiment of Fig. 8.

[0424] Optionally, the transceiver unit 1020 is configured to transmit a first reference signal, and transmit a second reference signal. The first reference signal and the second reference signal belong to a same reference signal resource set. At least one of frequency domain resources or transmission power of the first reference signal and the second reference signal is different.

[0425] In a second possible design, the apparatus 1000 can be a network device in the foregoing embodiments. The apparatus 1000 can implement steps or procedures corresponding to operations performed by the network device in the foregoing method embodiments. The transceiver unit 1020 can be configured to perform operations related to receiving and / or transmitting by the network device in the foregoing method embodiments.

[0426] For example, the transceiver 1020 is configured to receive the first reference signal and the 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 frequency domain resources or transmission power of the first reference signal and the second reference signal is different; and the processing unit 1010 is configured 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.

[0427] It should be understood that the specific process of each unit performing the corresponding steps described above has been described in detail in the method embodiments described above, and for the sake of brevity, will not be repeated here.

[0428] It should also be understood that the apparatus 1000 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logical circuit and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art can understand that the apparatus 1000 can be embodied as the communication apparatus in the above embodiments, and can be used to execute the processes and / or steps corresponding to the communication apparatus in each of the method embodiments described above. To avoid repetition, they will not be repeated here.

[0429] The apparatus 1000 of each of the above schemes has the function of implementing the corresponding steps performed by the communication apparatus in the above 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 (for example, 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 the processing unit, can be replaced by a processor, which respectively performs the transceiving operations and related processing operations in each of the method embodiments.

[0430] In addition, the transceiver 1020 described above can also be a transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0431] It should be noted that the apparatus in FIG. 10 can be a terminal device or a network device in the above embodiments, or a chip or a chip system, for example, a SoC. The transceiver 1020 can be an input / output circuit, a communication interface; and the processing unit 1010 can be a processor or a microprocessor or an integrated circuit integrated on the chip. Herein, no limitation is made.

[0432] Exemplarily, FIG. 11 shows a schematic diagram of a communication apparatus 1100. As shown in FIG. 11, the apparatus 1100 includes a processor 1110, and the processor 1110 is coupled with a memory 1120, the memory 1120 is configured to store computer programs or instructions and / or data, and the processor 1110 is configured to execute the computer programs or instructions stored in the memory 1120, or read the data stored in the memory 1120, to perform the method in each of the above method embodiments.

[0433] Optionally, the processor 1110 is one or more.

[0434] Optionally, the memory 1120 is one or more.

[0435] Optionally, the memory 1120 is integrated with the processor 1110, or is separately arranged.

[0436] Optionally, as shown in FIG. 11, the apparatus 1100 further includes a transceiver 1130, and the transceiver 1130 is configured to receive and / or send signals. For example, the processor 1110 is configured to control the transceiver 1130 to receive and / or send signals. The transceiver 1130 can also be divided into a receiver and / or a transmitter, wherein the receiver is configured to receive signals, and the transmitter is configured to send signals. The receiver is configured to perform the receiving operation related to the method shown in FIG. 8, and the transmitter is configured to perform the sending operation related to the method shown in FIG. 8. The transceiver 1130 can also be referred to as a communication interface, and the embodiments of the present application do not make any limitation in this regard.

[0437] For example, the processor 1110 can have the function of the processing unit 1220 shown in FIG. 11, the memory 1120 can have the function of a storage unit, and the transceiver 1130 can have the function of the transceiving unit 1210 shown in FIG. 11.

[0438] As an example, the apparatus 1100 is configured to implement the operations performed by the communication apparatus in each of the above method embodiments.

[0439] For example, the processor 1110 is configured to execute the computer programs or instructions stored in the memory 1120, to implement the related operations of the terminal device or the network device in each of the above method embodiments.

[0440] It should be understood that the processor mentioned in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), ASICs, field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0441] It should also be understood that the memory mentioned in the embodiments of the present application can be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM). For example, the RAM can be used as an external cache. As an example but not limitation, the RAM includes the following various forms: static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

[0442] When the communication device shown in the above Fig. 11 is a chip or a chip system, the communication device can include the memory 1120, and can also not include the memory 1210. When the communication device does not include the memory 1210, the communication device can be externally connected with a memory to realize the above-mentioned storage function.

[0443] It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, the memory (storage module) can be integrated in the processor.

[0444] It is to be understood that the memory described herein is intended to include, but is not limited to, these and any other suitable type of memory.

[0445] It is to be understood that the memory described herein is intended to include, but is not limited to, these and any other suitable type of memory.

[0446] Exemplarily, FIG. 12 is a schematic diagram of a chip system 1200 provided by embodiments of the present application. The chip system 1200 (or also referred to as a processing system) includes a logic circuit 1210 and an input / output interface 1220.

[0447] The logic circuit 1210 can be a processing circuit in the chip system 1200. The logic circuit 1210 can be coupled to a storage unit, and invoke instructions in the storage unit, so that the chip system 1200 can implement the methods and functions of embodiments of the present application. The input / output interface 1220 can be an input / output circuit in the chip system 1200, and output information processed by the chip system 1200, or input data or signaling information to be processed by the chip system 1200.

[0448] Optionally, the logic circuit 1210 can be implemented by one or more processors, including the one or more processors or processing portions in the one or more processors.

[0449] Optionally, the input / output interface 1220 can include a transceiver circuit, a transceiver, an input / output circuit or a communication interface.

[0450] As an option, the chip system 1200 is configured to implement operations performed by a communication apparatus (e.g., a terminal device, or a network device) in the above various method embodiments.

[0451] For example, the logic circuit 1210 is configured to implement processing-related operations performed by a communication apparatus (e.g., a terminal device, or a network device) in the above method embodiments; and the input / output interface 1220 is configured to implement sending and / or receiving-related operations performed by a communication apparatus (e.g., a terminal device, or a network device) in the above method embodiments.

[0452] Exemplarily, FIG. 13 shows a structural schematic diagram of a communication apparatus 1300 provided by an embodiment of the present application. As shown in FIG. 13, the communication apparatus 1300 includes a processor 1301, a transceiver 1302 and a memory 1303. The processor 1301, the transceiver 1302 and the memory 1303 communicate with each other through internal connection paths. The memory 1303 is configured to store instructions, such as computer degree codes and the like. The processor 1301 is configured to execute the instructions stored in the memory 1303 to control the transceiver 1302 to transmit and / or receive signals.

[0453] It should be understood that the communication apparatus 1300 can be specifically a terminal device or a network device in the above-described embodiments, and can be used to execute each step and / or process corresponding to the terminal device or the network device in the above-described method embodiments. Optionally, the memory 1303 can include a read-only memory and a random access memory, and provide instructions and data for the processor. A part of the memory can also include a non-volatile random access memory. For example, the memory can also store device type information. The processor 1301 can be configured to execute the instructions stored in the memory, and when the processor 1301 executes the instructions stored in the memory, the processor 1301 is configured to execute each step and / or process of the above-described method embodiments. The transceiver 1302 can include a transmitter 13021, a receiver 13022 and an antenna 13023. The transmitter 13021 can be configured to implement each step and / or process corresponding to the transmitter for executing a transmitting action in the above-described embodiments. For example, the transmitter 13021 can be configured to transmit information to another device through the antenna 13023. The receiver 13022 can be configured to implement each step and / or process corresponding to the receiver for executing a receiving action in the above-described embodiments. For example, the receiver 13022 can be configured to receive information from another device through the antenna 13023.

[0454] It should be understood that in the embodiments of the present application, the processor can be a CPU, and the processor can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0455] In the implementation process, the steps of the above method can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware processor execution completion, or executed by hardware and software modules in the processor. The software module can be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor executes the instructions in the memory, and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0456] The embodiments of the present application also provide a computer readable storage medium, which stores computer instructions for implementing the method executed by the communication device (such as terminal device, and network device) in each method embodiment described above.

[0457] For example, the computer program is executed by the computer, so that the computer can implement the method executed by the communication device (such as terminal device, and network device) in each method embodiment described above.

[0458] The embodiments of the present application also provide a computer program product, which contains instructions, and the instructions are executed by the computer to implement the method executed by the communication device (such as terminal device, and network device) in each method embodiment described above.

[0459] The embodiments of the present application also provide a communication system, which includes the terminal device and / or network device in each embodiment described above. For example, the system includes the terminal device and network device in FIG. 8.

[0460] The explanations and beneficial effects of the related contents in any of the above devices can refer to the corresponding method embodiments provided above, and will not be described here.

[0461] In several embodiments provided by the present application, it should be understood that the disclosed apparatus and method can be implemented by other means. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed mutual ones can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0462] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented 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 the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable apparatus. For example, the computer can be a personal computer, a server, a network device, or the like. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD), etc. For example, the foregoing available media includes but is not limited to: a variety of media that can store program codes such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, etc.

[0463] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection 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 path loss estimation value and the frequency domain resource are used to determine the transmission power, the transmission power, the downlink path loss estimation value and the frequency domain resource satisfy at least one of the following formulas: or or or or or or The transmission power is related to the transmission power offset, and 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 Calculate the g-th i The downlink path loss estimate for each 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, ∑ gi X(g i ) represents the g-th i The transmit power offset of the g-th reference signal, G represents the power offset used to transmit the g-th reference signal. i The number of antenna ports for each reference signal, P 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 provided in the alpha in the SRS,b,f,c (q s ) represents the service cell c, the carrier f, the activated uplink partial bandwidth b, the reference signal resource set q s provided in the alpha in the b,f,c (i, l) represents 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 service cell c, the carrier f, 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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