CN117560113A

CN117560113A - Method for data transmission, communication device and computer readable storage medium

Info

Publication number: CN117560113A
Application number: CN202210943929.2A
Authority: CN
Inventors: 张馨月; 徐志昆; 李忻; 张帅; 戴晓明
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2024-02-13

Abstract

A method of data transmission, a communication device, and a computer-readable storage medium, the method comprising: determining a first set of weight values, the first set of weight values comprising: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of first user information, and the second weighting value is used for adjusting the phase of second user information; processing the first user information according to the first weighted value and the first power factor to obtain a first signal, and processing the second user information according to the second weighted value and the second power factor to obtain a second signal, wherein the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information; processing the first signal and the second signal to obtain a first downlink signal; and transmitting a first downlink signal. The scheme provided by the application can be beneficial to reducing the error rate during data transmission.

Description

Method for data transmission, communication device and computer readable storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method, a communication device, and a computer readable storage medium.

Background

Multiple Access (MA) technology is a core problem of mobile communication network upgrade, determines capacity and basic performance of the network, and fundamentally affects complexity and deployment cost of the system. The existing 4G system adopts an orthogonal multiple access (Orthogonal Multiple Access, abbreviated as OMA) mode to avoid multiple access interference (Multiple Access Interference, abbreviated as MAI), and although the complexity of the receiver is relatively low, the degree of freedom of wireless communication resources is limited, and the efficiency of the communication system in accessing massive users at the same time is significantly reduced. Based on the multi-user information theory, the OMA system can only reach the inner boundary of the capacity of the downlink broadcast channel (Broadcast Channel, BC for short) and the uplink multiple access channel (Multiple Access Channel, MAC for short).

The Non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA for short) technology breaks through the limitation of resource allocation orthogonality, realizes the efficient utilization of limited resources through the Non-orthogonal allocation of the resources, and can theoretically obtain obvious performance gain compared with the OMA technology. However, since the NOMA technology improves transmission efficiency by introducing interference information, a higher error rate of data transmission is easily caused.

Disclosure of Invention

The technical purpose of the application is to provide a data transmission method which can be beneficial to reducing the error rate during data transmission.

In a first aspect, an embodiment of the present application provides a method for data transmission, including: determining a first set of weight values, the first set of weight values comprising: the system comprises a first weighted value and a second weighted value, wherein the first weighted value is used for adjusting the phase of first user information, and the second weighted value is used for adjusting the phase of second user information; processing the first user information according to the first weighted value and a first power factor to obtain a first signal, and processing the second user information according to the second weighted value and a second power factor to obtain a second signal, wherein the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information; processing the first signal and the second signal to obtain a first downlink signal; and sending the first downlink signal.

Optionally, the determining the first weighted value group includes: determining the first weighted value group from at least one weighted value group according to the first power factor, wherein the first weighted value group corresponds to the first power factor; and/or determining the first weighted value group from at least one weighted value group according to the second power factor, wherein the first weighted value group corresponds to the second power factor.

Optionally, the method further comprises: determining the first power factor and/or the second power factor according to the signal-to-noise ratio SNR of the first downlink and the SNR of the second downlink; wherein the first downlink is a downlink between the transmitting end of the first downlink signal and the receiving end of the first user information, and the second downlink is a downlink between the transmitting end of the first downlink signal and the receiving end of the second user information.

Optionally, the method further comprises: transmitting indication information, wherein the indication information is used for indicating any one or more of the following: the first weighting value set, the first power factor, the second power factor.

Optionally, the absolute value of the difference between the first reference signal received power RSRP and the second RSRP is greater than or equal to a first threshold, where the first RSRP is the RSRP of the receiving end of the first user information, and the second RSRP is the RSRP of the receiving end of the second user information.

Optionally, the first downlink signal comprises a real component signal and an imaginary component signal, and the real component signal and the imaginary component signal are uncorrelated.

Optionally, the processing the first signal and the second signal to obtain a first downlink signal includes: performing superposition processing on the first signal and the second signal to obtain a third signal, wherein the third signal comprises a first path of signal and a second path of signal; performing interleaving treatment on the first path of signals; and/or, performing interleaving processing on the second path of signals; the first path signal is a real component of the third signal, the second path signal is an imaginary component of the third signal, or the first path signal is an imaginary component of the third signal, and the second path signal is a real component of the third signal.

Optionally, the sending the first downlink signal includes: and transmitting the first downlink signal on a first frequency domain resource, wherein the first frequency domain resource is a downlink frequency domain resource corresponding to the first weighted value group.

Optionally, the downlink frequency domain resource for transmitting a signal further includes a second frequency domain resource, and the method further includes:

optionally, a second downlink signal is sent on the second frequency domain resource; the second frequency domain resource is a downlink frequency domain resource corresponding to a second weighted value group; the second weighted value group corresponds to a third power factor, the third power factor is used for adjusting the amplitude of the first user information or the second user information, and the second downlink signal is obtained by processing the first user information and the second user information according to the second weighted value group and the third power factor.

Optionally, the third power factor is used for adjusting the amplitude of the first user information, and the third power factor is the same as the first power factor; alternatively, the third power factor is used to adjust the amplitude of the second user information, and the third power factor is the same as the second power factor.

Optionally, the first weighted value satisfies the following expression:wherein said θ ₁ Is the first weighted value, and n ₁ Is an integer of 0.ltoreq.n ₁ N is less than or equal to N, and N is a positive integer.

Optionally, the second weighted value satisfies the following expression:wherein said θ ₂ Is the second weighted value, and n ₂ Is an integer of 0.ltoreq.n ₂ N is less than or equal to N, and N is a positive integer.

In a second aspect, embodiments of the present application further provide a method for data transmission, including: receiving a first downlink signal; demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain first user information and second user information; wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of the first user information, the second weighting value is used for adjusting the phase of the second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information.

Optionally, the first weight and the second weight are not 0 at the same time. That is, the first weight is 0 and the second weight is not 0; alternatively, the first weight is 0 and the second weight is not 0.

Optionally, the method further comprises: receiving indication information, wherein the indication information is used for indicating any one or more of the following: the first weighting value set, the first power factor, the second power factor.

Optionally, the receiving the first downlink signal includes: receiving the first downlink signal on a first frequency domain resource; wherein the first frequency domain resource corresponds to the first set of weights.

Optionally, the method further comprises: receiving a second downlink signal on a second frequency domain resource; the second frequency domain resource corresponds to a second weighted value group, the second weighted value group corresponds to a third power factor, and the third power factor is used for adjusting the amplitude of the first user information or the second user information; and demodulating the second downlink signal according to the second weighted value group and the third power factor.

Optionally, demodulating the first downlink signal according to the first weighted value set, the first power factor and the second power factor to obtain first user information and second user information, including: demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain a first demodulation result; and processing the first demodulation result and the demodulation result of demodulating the second downlink signal to obtain the first user information and the second user information.

In a third aspect, embodiments of the present application further provide a communication apparatus, including: the processing module and the communication module are used for processing the data; the processing module is used for determining a first weighted value group, processing the first user information according to the first weighted value and a first power factor to obtain a first signal, and processing the second user information according to the second weighted value and a second power factor to obtain a second signal; processing the first signal and the second signal to obtain a first downlink signal; wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of first user information, the second weighting value is used for adjusting the phase of second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information; the communication module is configured to send the first downlink signal.

In a fourth aspect, embodiments of the present application further provide a communication apparatus, including: the processing module and the communication module are used for processing the data; the communication module is used for receiving a first downlink signal; the processing module is used for demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain first user information and second user information; wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of the first user information, the second weighting value is used for adjusting the phase of the second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information.

In a fifth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, causes the method of data transmission provided in the first aspect described above to be performed.

In a sixth aspect, embodiments of the present application provide another computer-readable storage medium having stored thereon a computer program which, when executed by a processor, causes the method of data transmission provided in the second aspect described above to be performed.

In a seventh aspect, embodiments of the present application provide a communications device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor executing the steps of the method for data transmission provided in the first aspect when the computer program is executed.

In an eighth aspect, embodiments of the present application provide a communications device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor executing the steps of the method for data transmission provided in the second aspect when the computer program is executed.

Compared with the prior art, the technical scheme of the embodiment of the application has the following beneficial effects:

in the scheme of the embodiment of the application, the phase of the first user information is adjusted according to the first weighting value, and the amplitude of the first user information is adjusted according to the first power factor to obtain a first signal; and adjusting the phase of the second user information according to the second weighting value, and adjusting the amplitude of the second user information according to the second power factor to obtain a second signal. Further, a first downlink signal is obtained according to the first signal and the second signal, and the first downlink signal is sent. The technical scheme not only adjusts the amplitude of the user information, but also adjusts the phase of the user information, thereby being beneficial to improving the channel gain of data transmission and reducing the error rate of the user information.

Further, in the solution of the embodiment of the present application, the first downlink signal is obtained by processing the first signal and the second signal, where the real component signal and the imaginary component signal of the first downlink signal are uncorrelated. Therefore, the scheme can increase diversity order, obtain additional diversity gain, and is beneficial to further reducing error rate and improving data transmission performance.

Further, in the solution of the embodiment of the present application, an absolute value of a difference between a first reference signal received power RSRP and a second RSRP is greater than or equal to a first threshold, where the first RSRP is an RSRP of a receiving end of the first user information, and the second RSRP is an RSRP of a receiving end of the second user information. The user pairing mode can lead the channel quality difference between two terminals to be large enough, is favorable for a receiving end to distinguish interference signals from useful signals, and eliminates the interference signals so as to ensure the accuracy of data transmission.

Further, in the scheme of the embodiment of the application, a first weighted value group and a second weighted value group are determined, the first weighted value group and the second weighted value group are adopted to process the first user information and the second user information respectively, a first downlink signal and a second downlink signal are obtained, then the first downlink signal is sent on a first frequency domain resource, and the second downlink signal is sent on a second frequency domain resource. By adopting the scheme, the first user information and the second user information can be processed based on two different weighting strategies, so that the accuracy of transmission of the first user information and the second user information can be considered, and the bandwidth utilization rate can be improved.

Drawings

Fig. 1 is an application scenario schematic diagram of a data transmission method in an embodiment of the present application;

FIG. 2 is a flow chart of a method of data transmission according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an embodiment of interleaving a third signal in an embodiment of the present application;

fig. 4 is a flow chart of a second method of data transmission in an embodiment of the present application;

fig. 5 is a schematic diagram of a joint constellation in an embodiment of the present application;

fig. 6 is a schematic diagram of symbols corresponding to first user information and second user information in a joint constellation in an embodiment of the present application;

FIG. 7 is a schematic diagram of one embodiment of S44 in FIG. 4;

FIG. 8 is a schematic diagram of user pairing in an embodiment of the present application;

fig. 9 is a flowchart of a third method for data transmission according to an embodiment of the present application;

FIG. 10 is a schematic diagram of an embodiment of S92 in FIG. 9;

fig. 11 is a flowchart of a fourth method for data transmission according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a fourth method of data transmission shown in FIG. 11;

fig. 13 is a schematic data interaction diagram of a fifth data transmission method in an embodiment of the present application;

Fig. 14 is a schematic structural diagram of a first communication device in an embodiment of the present application;

fig. 15 is a schematic structural diagram of a second communication device in an embodiment of the present application;

fig. 16 is a schematic structural diagram of a third communication device in an embodiment of the present application.

Detailed Description

As described in the background art, when the NOMA technology is adopted for data transmission, the error rate of the data transmission is high.

The inventor of the application researches and discovers that in the prior art, only the amplitude of the user information is generally weighted and adjusted, and the error rate of data transmission still needs to be further reduced. In view of this, the embodiments of the present application provide a data transmission method, by introducing a weight value for adjusting the phase of user information, so that in the data transmission process, not only the amplitude of user information but also the phase of user information can be adjusted, thereby being beneficial to improving the channel gain of data transmission in the transmission process of multi-user information, and thus being beneficial to reducing the bit error rate of user information in the data transmission process.

It should be understood that, in the embodiment of the present application, the user information may include user data, control information, or include user data, control information, etc., and the embodiment of the present application does not limit what is specifically included in the user information.

Specifically, the communication system applicable to the embodiment of the present application includes, but is not limited to, a third generation system (3 th-generation, abbreviated as 3G), a long term evolution (long term evolution, abbreviated as LTE) system, a fourth generation system (4 th-generation, abbreviated as 4G), a fifth generation (5 th-generation, abbreviated as 5G) system (such as a New Radio (NR) system), and a future evolution system or multiple communication convergence systems. The 5G system may be a non-independent Networking (NSA) 5G system or an independent networking (SA) 5G system. The scheme of the embodiment of the application can be also applied to various new communication systems in the future, such as 6G, 7G and the like.

A terminal in an embodiment of the present application may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (MS), a remote Station, a remote terminal, a Mobile device, a User terminal, a terminal device (Terminal Equipment), a wireless communication device, a User agent, or a User apparatus. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved public land mobile network (Public Land Mobile Network, PLMN) etc., as examples of which the embodiments are not limited. In some embodiments of the present application, the terminal device may also be a device with a transceiver function, such as a chip system. The chip system may include a chip and may also include other discrete devices.

The network device in the embodiments of the present application is a device that provides a wireless communication function for a terminal, and may also be referred to as an access network device, a radio access network (radio access network, abbreviated as RAN) device, or an access network element, where the network device may support at least one wireless communication technology, such as LTE, NR, and so on. For example, the network device may be a Base Station (BS) (also referred to as a base station device), the device providing the base station function in the second generation (2 nd-generation, 2G) network includes a base radio transceiver station (base transceiver station, BTS), the device providing the base station function in the third generation (3 rd-generation, 3G) network includes a Node B (Node B), the device providing the base station function in the fourth generation (4 th-generation, 4G) network includes an evolved Node B (eNB), the device providing the base station function in the wireless local area network (wireless local area networks, WLAN) is an Access Point (AP), the device providing the base station function in NR, the next generation base station Node (next generation Node base station, gNB), and the Node B continuing to evolve (ng-eNB), wherein the Node B and the terminal device communicate using NR technology, the device and the Node B communicate using evolved universal terrestrial radio access (Evolved Universal Terrestrial Radio Access, E-UTRA) and the Node B can connect to the core network (5G-UTRA). The network device in the embodiment of the present application further includes a device that provides a base station function in a new communication system in the future, and the like. In some embodiments, the network device may also be an apparatus, such as a system-on-a-chip, having the functionality to provide wireless communication for the terminal. By way of example, the chip system may include a chip, and may also include other discrete devices.

It should be understood that the data referred to in the embodiments of the present application may be understood as data in a broad sense. For example, control information may also be understood as a type of data. As another example, user data is also a type of data. As another example, a combination of user data and control information is also one type of data.

Specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

In a wireless communication system, when wireless communication is performed between communication devices, a communication device that transmits data (or signals) may be referred to as a transmitting end, and a communication device that receives data (or signals) may be referred to as a receiving end. The transmitting side may also be referred to as a transmitting device, a transmitting side, or the like, and the receiving side may also be referred to as a receiving device, a receiving side, or the like, which is not limited in this embodiment.

For convenience of description, in the solution of the embodiment of the present application, downlink data transmission is taken as an example to describe and describe the technical solution provided in the embodiment of the present application in a non-limiting manner.

Referring to fig. 1, fig. 1 is an application scenario schematic diagram of a data transmission method in an embodiment of the present application. As shown in fig. 1, in the scenario of downlink data transmission, the network device is a transmitting end, and the first terminal (or may also be referred to as u ₁ ) And a second terminal (or, alternatively, may also be referred to as u ₂ ) For the receiving end, the downlink between the network device and the first terminal may be denoted as a first downlink DL1, and the downlink between the network device and the second terminal may be denoted as a second downlink DL2.

Information that the network device desires to send to the first terminal may be referred to as first user information and information that the network device desires to send to the second terminal may be referred to as second user information. Correspondingly, the first terminal is a receiving end of the first user information, and the second terminal is a receiving end of the second user information.

The following describes, in a non-limiting manner, an application scenario of the data transmission method provided in the embodiment of the present application with reference to fig. 1.

In the scenario of performing downlink data transmission by adopting the NOMA technology, the network device first needs to perform user pairing from a plurality of terminals to be scheduled to determine one or more paired user groups, where each paired user group may include a near user and a far user, and a distance between the near user and the network device is smaller than a distance between the far user and the network device. For more details on the paired user group and the determination method thereof, reference may be made to the following detailed description of fig. 8, which is not repeated here.

For convenience of description, the first terminal is taken as a terminal of a near user, and the second terminal is taken as a terminal of a far user as an example. Wherein the distance between the first terminal and the network device is smaller than the distance between the second terminal and the network device.

In the scenario illustrated in fig. 1, a first terminal u ₁ And a second terminal u ₂ Belonging to the same paired user group. For terminals in the same pairing user group, the network device may determine a power factor corresponding to each terminal, and allocate different power factors to different terminals to multiplex signals of multiple terminals in a non-orthogonal manner, so that data may be transmitted to different terminals in the same pairing user group using the same time-frequency resource.

Specifically, the network device may process the first user information and the second user information to obtain a downlink signal, and then send the downlink signal to the first terminal u on the same transmission resource ₁ And a second terminal u ₁ And transmitting a downlink signal.

More specifically, the network device is directed to the first terminal u on the first downlink DL1 ₁ Transmitting downlink signal, first terminal u ₁ After receiving the downlink signal, the first user information may be demodulated from the downlink signal. Correspondingly, the network device uses the same transmission resources on the second downlink DL2 to the second terminal u ₂ After the second terminal receives the downlink signal, the second terminal can demodulate the second user information from the downlink signal.

In one possible implementation, the network device processes the first user information and the second user information based on formula (1):

wherein alpha is ₁ Is a first power factor, alpha ₂ Is the second power factor s ₁ S is the first user information ₂ Second user information, alpha ₁ +α ₂ =1, and α ₁ ≠α ₂ ，0＜α ₁ ＜α ₂ ＜1。

Further, the downlink signal can be obtained asAnd E is the transmission power of the downlink signal transmitted by the network equipment.

Therefore, the above technical scheme adjusts the amplitude of the first user information only according to the first power factor, adjusts the amplitude of the second user information according to the second power factor, and then superimposes and transmits the adjusted signals. By adopting the scheme, the first user information and the second user information are only adjusted in a single dimension, and the error rate of the user information in the data transmission process still needs to be further reduced.

The method comprises the steps of taking a signal sending end as network equipment, taking a signal receiving end as a first terminal and a second terminal, wherein the first terminal is a first user information receiving end, and the second terminal is a second user information receiving end as an example. Wherein the first terminal is closer to the network device than the second terminal.

Referring to fig. 2, fig. 2 is a flow chart of a method for data transmission in an embodiment of the present application. The method shown in fig. 2 may be performed by a transmitting end of a signal, which may be the network device in fig. 1. The method illustrated in fig. 2 may include S21 to S24, where S in each step number in the present application represents a step.

S21, the network device determines a first weighted value group.

The first set of weights includes: the system comprises a first weight value and a second weight value, wherein the first weight value is used for adjusting the phase of the first user information, and the second weight value is used for adjusting the phase of the second user information.

That is, the first weight value is used to adjust the phase of the near user information and the second weight value is used to adjust the phase of the far user information. It should be noted that in the embodiments of the present application, near and far are relative concepts. Thus, the first user information may also be referred to as near user information. Accordingly, the second user information may also be referred to as remote user information.

It should be noted that, in the embodiment of the present application, the first weighted value and the second weighted value are not 0 at the same time. For example, the first weight is not 0 and the second weight is 0. For another example, the first weight is 0 and the second weight is not 0. For another example, the first weight is not 0 and the second weight is not 0.

S22, the network equipment processes the first user information according to the first weighted value and the first power factor to obtain a first signal; and processing the second user information according to the second weighted value and the second power factor to obtain a second signal.

The first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information.

Taking the example that the network device processes the first user information according to the first weighted value and the second power factor to obtain a first signal. In one possible implementation, the network device may perform channel coding, bit interleaving, and modulation mapping on the first user information to obtain corresponding code symbols, and then modulate the amplitude of the code symbols based on the first power factor, and modulate the phase of the code symbols based on the first weighted value to obtain the first signal.

S23, the network equipment processes the first signal and the second signal to obtain a first downlink signal.

S24, the network equipment sends a first downlink signal.

In some embodiments, the receiving end of the first user information and the receiving end of the second user information belong to the same user group. That is, the first terminal and the second terminal belong to the same user group. For example, an absolute value of a difference between a reference signal received power (Reference Signal Receiving Power, RSRP) of the first terminal and an RSRP of the second terminal is greater than or equal to a first threshold.

The first threshold may be predefined by a protocol, may be calculated by a network device, or may be preconfigured, which is not limited in this embodiment. For more details on determining the paired user group, reference may be made to the more description below regarding fig. 8, which is not repeated here.

In other words, the network devices may pair or group terminals in the coverage area according to their RSRP. Thereby helping the receiving end to distinguish the interference signal from the useful signal and eliminate the interference signal so as to ensure the accuracy of data transmission.

In the embodiment of the present application, the network device may also divide the user group according to other parameters, such as signal to noise ratio, and the like, which is not limited.

The network device may determine a first power factor alpha ₁ And/or a second power factor alpha ₂ First power factor alpha ₁ For adjusting the amplitude of the first user information, the second power factor alpha ₂ For adjusting the amplitude of the second user information. Wherein the first power factor alpha ₁ Can satisfy the following conditions: alpha ₁ > 0, second power factor alpha ₂ Can satisfy the following conditions: alpha ₂ ＞0。

In one non-limiting example, 0 < alpha ₁ ＜α ₂ < 1. In other implementations, if the first terminal is a far user terminal and the second terminal is a near user terminal, 0 < α ₂ ＜α ₁ ＜1。

First power factor alpha ₁ And a second power factor alpha ₂ The sum may be a fixed value, which may be predefined by the protocol, or preconfigured. Illustratively, a first power factor α ₁ And a second power factor alpha ₂ The sum is 1, in which case the network device may be based on the first power factor alpha ₁ And a second power factor alpha ₂ One of which can be determined.

In an implementation, the first power factor alpha ₁ And/or a second power factor alpha ₂ May be determined based on the signal-to-noise ratio (Signal Noise Ratio, abbreviated SNR) of the first downlink and the SNR of the second downlink. Specifically, the second power factor may be determined using equation (2):

wherein SNR is ₁ For the SNR of the first downlink, SNR ₂ Is the SNR for the second downlink. Wherein the first downlink refers to a downlink between the network device and the first terminal, and the second downlink refers to a downlink between the network device and the second terminal.

With such a scheme, the network device may determine the optimized first power factor and second power factor, and may optimize the allocation of transmit power.

In other embodiments, the first power factor and the second power factor may be preconfigured or determined by calculation using other calculation methods, which is not limited in this embodiment. For more details about the first power factor and the second power factor, reference may be made to the relevant description of fig. 1, and no further description is given here.

In one example, the first weight may satisfy equation (3)

Wherein θ ₁ For the first weight value, n ₁ Is an integer of 0 to n ₁ N is less than or equal to N, and N is a positive integer. More specifically, N may be a positive integer set in advance, or may be determined by the network device when S21 is performed, for example, may be determined according to the capability of the first terminal and the second terminal to receive signals, but is not limited thereto.

In another example, the second weight may satisfy equation (4)

Wherein θ ₂ Is a second weighted value, n ₂ Is an integer. N is 0 to or less ₂ N.ltoreq.N in the practice, N ₁ And n ₂ May be equal or unequal.

The weighted value satisfying the formula (3) is adopted as the first weighted value or the weighted value satisfying the formula (4) is adopted as the second weighted value, namely, the weighted value after quantization processing is adopted, so that the weighted processing process of the first user information and the second user information is simplified, the calculation efficiency is improved, and the data transmission efficiency is improved.

In a specific implementation of S21, the network device may determine the first set of weighting values according to a first power factor, or determine the first set of weighting values according to a second power factor.

In the first embodiment of the present application, the network device may be preconfigured with a mapping relationship between the first power factor and the set of weighting values, and the set of weighting values corresponds to the first power factor one by one. Thus, in performing S21, the network device may determine a first set of weighting values from the at least one set of weighting values according to the first power factor.

In the second embodiment of the present application, the network device may be preconfigured with a mapping relationship between the second power factor and the set of weighting values, and the set of weighting values and the second power factor correspond to each other one by one. Thus, in performing S21, the network device may determine a first set of weighting values from the at least one set of weighting values according to the second power factor.

It should be noted that, the first weighted value sets corresponding to the first power factor and the second power factor having the corresponding relationship are the same, and the difference is that the mapping relationship between the weighted value set and the first power factor or the mapping relationship between the weighted value set and the second power factor is preset. The first power factor and the second power factor having the corresponding relation may refer to a first power factor and a second power factor with a sum of 1.

In a third embodiment of the present application, the network device configures in advance a mapping relationship between the second power factor and the set of weighted values, and the second power factor and the set of weighted values are in one-to-one correspondence. Wherein each set of weight groups may comprise a plurality of first weight groups. Wherein the plurality of first sets of weights may be derived based on different optimization objectives.

The optimization objective may be any of the following: a first optimization objective, a second optimization objective, and a third optimization objective.

The first optimization objective may be to optimize only the first terminal, i.e. to make the error rate of the first user information as low as possible, irrespective of the error rate of the second user information. The second optimization objective may be to optimize only the second terminal, i.e. to make the error rate of the second user information as low as possible, irrespective of the error rate of the second user information. The third optimization objective refers to jointly optimizing the first terminal and the second terminal, i.e. taking into account the error rate of the first user information and the error rate of the second user information.

Accordingly, each set of weight groups may include: a first set of weights, a second set of weights, and a third set of weights, the first set of weights corresponding to a first optimization objective, the second set of weights corresponding to a second optimization objective, and the third set of weights corresponding to a third optimization objective. Wherein at least one weighting value is different between every two weighting value groups in the same weighting value group set.

In performing S21, in one aspect, the network device may determine a first set of weight sets from the at least one set of weight sets according to a second power factor; in another aspect, the network device may determine a first set of weighted values from the first set of weighted values according to an optimization objective. It should be noted that, in a specific implementation, the optimization objective may be determined by the network device according to an actual service requirement. For example, the network device may determine the optimization objective based on the priorities of the first user information and the second user information.

Referring to table 1, table 1 shows a correspondence between the second power factor and the set of weighted value sets in the embodiment of the present application.

Alpha is alpha ₂ For example, =0.8, if the optimization objective is to optimize the first terminal (i.e. the first optimization objective), the network device may determine the first set of weights as: θ ₁ ＝π/8，θ ₂ =pi/16; if the optimization objective is to optimize the second terminal, the network device may determine that the first set of weighting values is: θ ₁ ＝0，θ ₂ ＝π/16。

It should be noted that table 1 only exemplarily shows a case where each set of weight value groups includes the first type of weight group and the second type of weight value group. In other embodiments, each set of weight sets may further include the third weight set described above. Still in alpha ₂ For example, =0.8, if the optimization objective is to jointly optimize the first terminal and the second terminal (i.e. the third optimization objective), the network device may determine the first set of weights as: θ ₁ ＝π/8，θ ₂ ＝π/8。

It should be noted that, the mapping relationship between the first power factor and the set of weighted value sets may be predefined, which is not limited in this embodiment.

From the above, the network device may determine the first set of weighting values according to the employed power factor. That is, the network device selects the corresponding weighted value group according to the policy of power allocation to adjust the phase of the user information, which is conducive to more optimal weighted adjustment of the user information, thereby improving the accuracy of data transmission.

In a specific implementation of S22, the network device processes the first user information according to the first weight and the first power factor to obtain a first signal, and processes the second user information according to the second weight and the second power factor to obtain a second signal.

Specifically, in one aspect, the network device may adjust a phase of the first user information according to the first weighted value, and adjust an amplitude of the first user information according to the first power factor to obtain a first signal; on the other hand, the phase of the second user information is adjusted according to the second weighting value, and the amplitude of the second user information is adjusted according to the second power factor, so that a second signal is obtained.

Further, in some specific embodiments, the network device may perform channel coding, bit interleaving, and modulation mapping on the first user information to obtain a modulation symbol corresponding to the first user information in the constellation, and perform channel coding, bit interleaving, and modulation mapping on the second user information to obtain a modulation symbol corresponding to the second user information in the constellation. Further, the network device may rotate the modulation symbol corresponding to the first user information in the constellation diagram according to the first weight value, where the first weight value is the rotation angle of the modulation symbol corresponding to the first user information; and the network equipment rotates the modulation symbol corresponding to the second user information in the constellation diagram according to the second weighted value, wherein the second weighted value is the rotation angle of the modulation symbol corresponding to the second user information. It should be noted that, in the embodiments of the present application, the "modulation symbol" refers to a representation of a signal in a complex plane (i.e., a constellation diagram), and does not refer to a symbol in a slot. In a specific implementation, the network device may process the encoded symbol corresponding to the first user information using formula (5), and process the encoded symbol corresponding to the second user information using formula (6):

Wherein s is ₁ 'is the first signal, s' ₂ Is the second signal s ₁ S for the corresponding code symbol of the first user information in the constellation diagram ₂ And e is a natural base number, and j represents a complex unit for a code symbol corresponding to the second user information in the constellation diagram.

In a specific implementation of S23, the network device may first perform a superposition process on the first signal and the second signal to obtain a third signal. Specifically, the network device may perform the superposition processing on the first signal and the second signal according to formula (7):

where x is the third signal and E is the transmit power.

Specifically, the third signal includes a first signal and a second signal, where the first signal is a real component of the third signal and the second signal is an imaginary component of the third signal. Alternatively, the first signal may be an imaginary component of the third signal, and the second signal may be a real component of the third signal.

Further, the network device may interleave at least a portion of the third signal to obtain the first downlink signal. For convenience of description, a specific method of the interleaving process will be described below taking the first signal as the real component of the third signal and the second signal as the imaginary component of the third signal as an example.

That is, the third signal can be expressed by the formula (8):

x _t ＝Re(x _t )+j Im(x _t ) Formula (8)

Wherein x is _t For the third signal Re (x _t ) For the first path of signal, im (x _t ) Is the second signal.

In a first example, the network device may interleave the first path signal but not the second path signal. Specifically, the network device may perform interleaving processing on the third signal according to formula (9) to obtain a first downlink signal:

wherein,for the first downstream signal, k is the interleaving depth (Interleaving Depth).

It should be noted that the interleaving depth k is larger than the coherence time of the channel. Therefore, the correlation between the first path of signals and the second path of signals can be broken, so that the diversity gain of the system is doubled. In an implementation, the interleaving depth k is greater than the coherence time of the first downlink if the coherence time of the first downlink is greater than the coherence time of the second downlink. Alternatively, if the coherence time of the second downlink is greater than the coherence time of the first downlink, the interleaving depth k is greater than the coherence time of the second downlink.

In a second example, the network device may interleave the second path signal but not the first path signal. Referring to fig. 3, fig. 3 is a schematic diagram of a specific implementation of interleaving a third signal in the embodiment of the present application. More specifically, fig. 3 shows a specific procedure of the interleaving process in the second example.

Specifically, the network device may perform interleaving processing on the third signal according to formula (10) to obtain a first downlink signal:

as shown in fig. 3, the network device may send a second signal Im (x _t ) Performs an interleaving process, and interleaves the second signal Im (x _t-k ) And a first path signal Re (x _t ) After superposition, a first downlink signal is obtainedThen for the first downstream signal->And mapping Resource elements (RE for short) and then sending.

The interleaving depth k adopted in the interleaving process of the second path of signals is larger than the coherence time of the channel. For more on the interleaving depth k see the relevant description above.

With continued reference to fig. 1, in a third example, the network device may perform interleaving on both the first signal and the second signal, where the interleaving depth of the first signal and the interleaving depth of the second signal are different. Specifically, the third signal may be subjected to interleaving processing according to formula (11), to obtain a first downlink signal:

wherein k is ₁ For a first interleaving depth, k ₂ Is the second interleaving depth, and k ₁ ≠k ₂ ，|k ₁ -k ₂ I > T, where T is the greater of the coherence time of the first downlink and the coherence time of the second downlink.

Thus, the network device can process the first signal and the second signal to obtain a first downlink signal. Wherein the first downlink signal comprises a real component signal and an imaginary component signal, and the real component signal and the imaginary component signal are uncorrelated. Thus, not only the real component signal contains both the first user information and the second user information, but also the imaginary component signal contains both the first user information and the second user information. Compared with the scheme of carrying out weight adjustment on the first user information and the second user information in only a single dimension, the scheme of the embodiment of the application can obtain increased diversity order and larger diversity gain. Not only can high-efficiency coding be realized, but also the capability of resisting channel fading of the system can be improved.

In the implementation of S24, the network device may first perform Resource Element (Resource Element) mapping on the first downlink signal. In particular, the network device may map the first downlink signal onto available transmission resources and then send the first downlink signal to the first terminal and the second terminal on the transmission resources carrying the first downlink signal. The transmission resources may include frequency domain resources and time domain resources, among others.

In the solution of the embodiment of the present application, the frequency domain resource may be a carrier, a partial bandwidth, or the like, which is not limited in this embodiment.

The frequency domain resources used to transmit the downlink signal may have a correspondence with the set of weights. The network device may determine, from the set of frequency domain resources, a downlink frequency domain resource corresponding to the first set of weight values according to the first set of weight values. Alternatively, the downlink frequency domain resource for transmitting the first downlink signal may be determined first, and then the first weight value set may be determined according to the correspondence between the downlink frequency domain resource and the weight value set.

In one example, the network device may determine a first frequency domain resource corresponding to the first set of weights from the first set of weights and then transmit a first downlink signal on the first frequency domain resource. More specifically, the network device may be preconfigured with a mapping relationship between the weighted value group and the downlink frequency domain resource, and according to the first weighted value group and the mapping relationship, the downlink frequency domain resource corresponding to the first weighted value group may be determined and recorded as the first downlink frequency domain resource.

In another example, the network device may determine the first frequency domain resource from a power factor (e.g., a first power factor and/or a second power factor). In the case that the power factor (e.g., the second power factor) and the weight set have a mapping relationship, a mapping relationship between the power factor and the downlink frequency domain resource may also be preconfigured. In a specific implementation, on one hand, the network device may determine a first weight set according to the power factor, and on the other hand, may determine a first frequency domain resource according to the power factor, so as to obtain a downlink frequency domain resource corresponding to the first weight set.

It should be noted that, the method for determining the time domain resource in the embodiment of the present application is not limited.

Further, the network device may send a first downlink signal to the first terminal and the second terminal on the first frequency domain resource.

From this, the first downlink signal may be sent to the first terminal and the second terminal on the determined transmission resources. Accordingly, the first terminal receives the first downlink signal to receive the first user information, and the second terminal receives the first downlink signal to receive the second user information, and the specific content of the downlink signal received by the terminal may be referred to the related description of fig. 9 below, which is not repeated herein.

In another embodiment, the network device may send the downlink signal on different frequency domain resources, where the downlink signal sent on different frequency domain resources may be obtained by processing the first user information and the second user information according to different weight value sets.

For example, a frequency band for downlink communication is divided into a plurality of sub-bands, in which case frequency domain resources may be understood as sub-bands. The network device may transmit the downstream signal on different sub-bands. As another example, frequency domain resources may also be understood as carriers. In this case, the network device may transmit the downstream signal on a different carrier. As another example, the frequency domain resource may also be understood as a carrier Bandwidth Part (BWP). In this case, the network device may transmit the downstream signal on a different BWP. It should be noted that, the specific implementation manner of the frequency domain resource is not limited in the embodiments of the present application.

Specifically, the network device may send a first downlink signal on a first frequency domain resource, and send a second downlink signal on a second frequency domain resource, where the second downlink signal may be obtained by processing the first user information and the second user information according to a second weight set and a third power factor.

The third power factor may be used to adjust the amplitude of the first user information, or may be used to adjust the amplitude of the second user information. The following describes an example in which the third power factor is used to adjust the amplitude of the first user information. Correspondingly, when the network device adjusts the second user information according to the second weighted value set, the power factor used for adjusting the amplitude of the second user information may be denoted as a fourth power factor.

More specifically, the second weight group may include a third weight and a fourth weight. The third weight value is used for adjusting the phase of the first user information, and the fourth weight value is used for adjusting the phase of the second user information. It should be noted that the third weight value is different from the first weight value, and/or the fourth weight value is different from the second weight value.

Further, the network device may adjust the phase of the first user information according to the third weighted value, and adjust the amplitude of the first user information according to the third power factor, to obtain a fifth signal; and adjusting the phase of the second user information according to the fourth weighting value, and adjusting the amplitude of the second user information according to the fourth power factor to obtain a sixth signal. For more details on the processing of the second user information by the network device according to the second weight set, reference may be made to the description related to S22 above, which is not repeated here.

Further, the network device may process the fifth signal and the sixth signal to obtain a second downlink signal. Regarding the processing procedures of the fifth signal and the sixth signal, reference may be made to the description of the processing procedures of the first signal and the second signal in S23, and the description thereof will not be repeated here.

Further, the network device may transmit the first downlink signal on the first frequency domain resource and the second downlink signal on the second frequency domain resource.

Wherein the first frequency domain resource and the second frequency domain resource are different frequency domain resources. For example, the set of available frequency domain resources that transmit the first user information and the second user information may include two or more second subsets of frequency domain resources, and the first frequency domain resources and the second frequency domain resources may be selected from different subsets of frequency domain resources.

Further, the power factor corresponding to the second weight set and the power factor corresponding to the first weight set may be the same or different.

In one non-limiting example, the first power factor and the third power factor may be the same, and correspondingly, the second power factor and the fourth power factor may be the same. For more on the third power factor and the fourth power factor, reference may be made to the above description about the first power factor and the second power factor, and the description is omitted here.

Accordingly, the first weight group and the second weight group may belong to the same set of weight groups as described above. More specifically, the first set of weighting values may correspond to the first optimization objective described above, and the second set of weighting values may correspond to the second optimization objective described above. Alternatively, in other embodiments, the first set of weights may correspond to the second optimization objective described above, and the second set of weights may correspond to the first optimization objective described above.

In a specific implementation, after the network device determines the second power factor using the above formula (2), the first weight set and the second weight set corresponding to the second power factor may be determined with reference to table 1 above. In other embodiments, the first power factor may also be determined, and then the first set of weighting values and the second set of weighting values corresponding to the first power factor are determined.

See Table 1, at alpha ₂ For example, =0.8, the first set of weights may be θ ₁ ＝π/8，θ ₂ =pi/16; the second set of weights may be: θ ₁ ＝0，θ ₂ ＝π/16。

For more on which the network device can transmit different downlink signals on different frequency domain resources, see also the related description below with respect to fig. 11.

Compared with the scheme of processing the first user information and the second user information by only adopting a single weighted value group, the error rate of one specific user information can be generally only as low as possible, and the transmission performance of other user information can be lost. Therefore, in the scheme of the embodiment of the application, different weighted value sets are adopted to carry out weighted processing in the range of different frequency domain resources, so that the performance of various mapping modes is compromised, and the transmission performance of two user information can be improved on the basis of simultaneously meeting the requirements of two user communication services. In addition, different weighted value sets are applied to different frequency bands, so that the bandwidth utilization rate can be maximized while the multi-user performance is improved.

Referring to fig. 4, fig. 4 is a flow chart of a second method for data transmission in an embodiment of the present application.

In a specific implementation, the network device may perform S41 to S43 on the first user information and the second user information, respectively, to obtain a modulation symbol corresponding to the first user information in the constellation diagram, and a modulation symbol corresponding to the second user information in the constellation diagram.

S41 to S43 will be described below taking first user information as an example. The specific process of performing S41 to S43 on the second user information may refer to the related description of performing S41 to S43 on the first user information, and will not be described again.

S41, the network equipment performs Channel Coding (Channel Coding) on the first user information to obtain a first bit sequence.

In an implementation, the network device may input the first user information to the encoder for channel coding to obtain the first bit sequence output by the encoder. The encoder may perform channel coding based on an existing coding method, which is not limited in this embodiment. For example, the encoding may be performed by using a method of forward error correction (Forward Error Correction, abbreviated as FEC)), but is not limited thereto.

And S42, the network equipment performs Bit Interleaving (Bit Interleaving) on the first Bit sequence to obtain an interleaved first Bit sequence.

In a specific implementation, the network device may perform bit interleaving by using an existing bit interleaving method, and the embodiment of the present application is not limited to a specific method of bit interleaving.

And S43, the network equipment carries out modulation mapping on the interleaved first bit sequence so as to obtain a modulation symbol corresponding to the first user information in the constellation diagram.

As one non-limiting example, the network device may perform joint modulation using gray (Gary) mapping to modulate the first user information and the second user information into modulation symbols in a joint constellation. Referring to fig. 5, fig. 5 is a schematic diagram of a joint constellation in an embodiment of the present application.

As shown in fig. 5, the joint constellation includes a plurality of modulation symbols (e.g., 16 modulation symbols), and each modulation symbol corresponds to a 4-bit symbol. More specifically, the bits corresponding to each modulation symbol may be characterized as b ₀ b ₁ b ₂ b ₃ Wherein the first two bits (b ₀ b ₁ ) For the second terminal u ₂ Corresponding symbol (i.e. the terminal of the far user), the last two bits (b ₂ b ₃ ) For the first terminal u ₁ (i.e., near-user terminals) corresponding symbols. In other embodiments, the first two bits (b ₀ b ₁ ) For the first terminal u ₁ Corresponding symbol (i.e., near user terminal), the last two bits (b ₂ b ₃ ) For the second terminal u ₂ (i.e., the terminal of the far-end user) to which the present embodiments are not limited.

Wherein, the minimum Euclidean distance in the combined constellation is 1 bit. That is, only 1 bit of the 4 bits corresponding to two adjacent symbols in the joint constellation is different in value.

Further, for the interleaved first bit sequence, the network device may group according to a 2-bit length, and each group may be expressed asWherein (1)>t is the duration of the symbol to which the packet corresponds.

Further, the network device may map v according to the mapping rule _t The modulation maps into modulation symbols in a joint constellation. The mapping rule may be gray (Gary) mapping, and the modulation mode may be quadrature phase shift keying (Quadrature Phase Shift Keying, abbreviated as QPSK). In other embodiments, other mapping rules may be used, and other modulation schemes may be used, which are not limited in this embodiment of the present application.

Referring to fig. 6, fig. 6 is a schematic diagram of modulation symbols corresponding to first user information and second user information in a joint constellation in an embodiment of the present application.

As shown in fig. 6, the modulation symbols corresponding to the first user information are represented by black five-pointed star marks and black four-pointed star marks in fig. 6, and the modulation symbols corresponding to the second user information are represented by white five-pointed star marks and white four-pointed star marks in fig. 6.

In a specific implementation of S44, the network device may perform a weighting process on the modulation symbol corresponding to the first user information. Correspondingly, the modulation symbols corresponding to the second user information can be weighted. Wherein the weighting process may include: adjusting amplitude and adjusting phase.

Specifically, in one aspect, the network device may adjust a phase of a modulation symbol corresponding to the first user information according to the first weight value and adjust an amplitude of the modulation symbol corresponding to the first user information according to the first power factor, to obtain the first signal. On the other hand, the network device may adjust the phase of the modulation symbol corresponding to the second user information according to the second weighting value, and adjust the amplitude of the modulation symbol corresponding to the second user information according to the second power factor, so as to obtain the second signal.

Further, the network device may perform superposition processing on the first signal and the second signal to obtain a third signal.

Specifically, the procedure of S44 and the superimposition processing can be described by the formula (12):

wherein x is the third signal, E is the transmit power, α ₁ Is a first power factor, alpha ₂ Is the second power factor s ₁ For the corresponding modulation symbols, s, of the first user information in the joint constellation ₂ Modulation symbol corresponding to second user information in joint constellation diagram, e is natural base number, j represents complex unit, θ ₁ For the first weight value, θ ₂ Is the second weight.

Referring to fig. 7, fig. 7 is a schematic diagram of an embodiment of S44 in fig. 4. Specifically, in the implementation of S44, for the modulation symbols in the joint constellation shown in fig. 6, the symbol corresponding to the first user information is rotated by θ ₁ And rotating a modulation symbol corresponding to the second user information by θ ₂ . Further, the rotated modulation symbols are superimposed to obtain the modulation symbols corresponding to the third signal in the joint constellation diagram. In fig. 7, the corresponding modulation symbols of the third signal in the joint constellation are represented by the linefilled pentagram symbols and the linefilled gray quadrangle symbols.

With continued reference to fig. 4, in a specific implementation of S45, the network device may perform an interleaving process on the third signal to obtain a first downlink signal. For more details regarding S45, reference may be made to the description related to S23 above, and the description is omitted here.

In a specific implementation of S46, the network device may perform resource element mapping on the first downlink signal and then send the first downlink signal. For more details regarding S46, reference is made to the description related to S24 above, and will not be repeated here.

Further details regarding the method of data transmission illustrated in fig. 4 may be described above in relation to fig. 1 to 3, and will not be repeated here.

Referring to fig. 8, fig. 8 is a schematic diagram of determining a paired user group in an embodiment of the present application. A specific procedure for determining the paired user group is described below with reference to fig. 8.

First, the network device may count terminals to be served by the network device, and determine the number L of terminals in the paired user group. In the solution of the embodiment of the present application, l=2, and the number of terminals to be served is denoted as M. In fig. 8, m=8 is taken as an example.

Second, the network device may rank the M terminals according to their RSRP. More specifically, the terminals may be ranked in order of RSRP from large to small, or may be ranked in order of RSRP from small to large, which is not limited in this embodiment. In fig. 8, the order from small to large RSRP is taken as an example.

Further, the network device may calculate a difference between RSRP of the mth terminal and RSRP of the m+1-M terminals, and if an absolute value of the difference is greater than or equal to a first threshold, determine the mth terminal and the m+1-M terminals to belong to the same paired user group, that is, determine the mth paired user group. Wherein M is a positive integer, M is greater than or equal to 1 and less than or equal to M/2, and the first threshold value may be defined by a protocol, may be preconfigured, or may be calculated by the network device according to a load, which is not limited in this embodiment.

As shown in fig. 8, the network device may determine that the terminal 2 and the terminal 1 belong to the same paired user group, that the terminal 5 and the terminal 6 belong to the same paired user group, that the terminal 7 and the terminal 4 belong to the same paired user group, and that the terminal 8 and the terminal 3 do not belong to the same paired user group. The OMA technique may be employed for data transmission for two terminals not belonging to the same paired user group.

The user pairing mode can lead the channel quality difference between two users to be large enough, which is beneficial to the interference elimination of a receiver, further leads NOMA transmission to be more effective and improves the system performance.

Referring to fig. 9, fig. 9 is a schematic flow chart of a third data transmission method in the embodiment of the present application, where the method may be executed by a terminal, and the terminal may be a first terminal or a second terminal, which is not limited in this embodiment of the present application. The following describes taking the first terminal as an execution subject. The method of data transmission shown in fig. 9 may include S91 to S92:

s91, the first terminal receives a first downlink signal;

s92, the first terminal demodulates the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain first user information and second user information.

The first terminal may receive the indication information from the network device before performing S91. The first terminal may determine itself to be the first terminal (i.e., near user) according to the power factor in the indication information. . For example, if the received power factor is less than 0.5, the first terminal may determine itself to be a near-user terminal.

Specifically, the indication information may include any one or more of the following: a first set of weights, a first power factor, a second power factor, an interleaving depth, a first frequency domain resource.

In one example, the network device may explicitly indicate the power factor in the indication information, and after receiving the indication information, the first terminal may determine the corresponding set of weighting values and the first frequency domain resource according to the power factor. That is, the set of weights and the first frequency domain resource may be indicated implicitly.

More specifically, the indication information may include a power factor, and the first terminal may be preconfigured with a mapping relationship between the power factor and the set of weight values, and a mapping relationship between the power factor and the downlink frequency domain resource, whereby the first terminal may determine the set of weight values according to the power factor, and determine the first downlink frequency domain resource according to the power factor.

Further, the first terminal may determine its own corresponding weight value (i.e., the first weight value) from the weight value group.

In other examples, the network device may also explicitly indicate information other than the power factor in the indication information, e.g., may explicitly indicate a set of weights, interleaving depth, first frequency domain resources, etc.

In a specific implementation of S91, the first terminal may receive the first downlink signal on the first frequency domain resource described above.

In the implementation of S92, the first terminal may perform decoding processing on the first downlink signal according to the first weight set, the first power factor, and the second power factor to obtain the first user information and the second user information.

Further, the first terminal may discard the second user information and retain the first user information, thereby completing the reception of the first user information. Correspondingly, for the second terminal, the second terminal may discard the first user information and retain the second user information, thereby completing the reception of the second user information.

In a specific implementation, the first terminal may use various suitable decoding methods for processing, for example, methods such as maximum likelihood (maximum likelihood, abbreviated as ML) detection, successive interference cancellation (successive interference cancellation, abbreviated as SIC) detection, etc., which are not limited in this embodiment of the present application.

Referring to fig. 10, fig. 10 is a schematic flow chart of a specific embodiment of S92 in fig. 9. S92 shown in fig. 10 may include S101 to S103. S92 is described below in non-limiting fashion in conjunction with fig. 10.

S101, the first terminal carries out de-interleaving processing on the first downlink signal to obtain a fourth signal.

Specifically, S101 may be a process of the above-described inverse process of the interleaving process on the third signal. More specifically, the indication information may further include an interleaving depth, and the first terminal may perform a de-interleaving process on the first downlink signal according to the interleaving depth.

The fourth signal y resulting from the de-interleaving, irrespective of the instant t, can be expressed as:

y=hx+n formula (13)

Where h is the channel fading coefficient, n is zero mean and variance is sigma ² Complex gaussian white noise of/2.

S102, the first terminal performs joint detection on the fourth signal.

In the solution of the embodiment of the present application, the first terminal may perform joint detection by using a maximum likelihood (Maximum Likelihood, abbreviated as ML) detection manner.

Specifically, the first terminal may previously receive a codebook, which may refer to a joint constellation illustrated in fig. 5, where the joint constellation includes a plurality of modulation symbols. Further, the first terminal may search through all possible combinations of the fourth signal and the modulation symbols in the codebook, and find, among the multiple modulation symbols in the joint constellation, the modulation symbol with the smallest distance from the fourth signal as the modulation symbol corresponding to the fourth signal. It should be noted that, since the demodulation process is related to the joint constellation, the demodulation process is related to the first weight value, the second weight value, the first power factor, and the second power factor.

More specifically, in case the receiver (i.e. the terminal) knows y, the first terminal can estimate the third signal x by ML detection as:

wherein,for the third signal estimated by the first terminal, argmin f (x) represents the value of the x-variable when the objective function f (x) takes the minimum value, f (x) = |y-hx|, Ω represents the set of all symbols in the joint constellation, and||y-hx|| is used to represent the distance between vector y and vector (hx).

Further, splitting equation (13) into real and imaginary parts can be expressed as:

wherein the subscriptRepresenting the real part->The representation takes the imaginary part. h is a _R 、h _I Is defined as transmission +.>Is provided. Wherein, h is because the real part and the imaginary part of x have different channel gains due to the interleaving process _R ≠h _I 。

Since the symbols s in the joint constellation can be represented asThe soft decision metric for detecting s can be expressed as:

accordingly, the log-likelihood ratio (Log Likelihood Ratio, LLR for short) can be expressed as

Wherein,representing a set of symbols corresponding to the fourth signal, < >>The value representing the ith bit in each symbol is l, i e {1,2,3,4}, l e {0,1}.

It should be noted that, x in the formula (13) and the formula (14) is obtained by processing the first user information and the second user information by the transmitting end according to the first weighted value group, the first power factor and the second power factor. The first terminal also needs to use the first weighting value theta when demodulating according to the formulas (16) and (17) ₁ Second weighting value θ ₂ First power factor alpha ₁ And a second power factor alpha ₂ 。

Whereby the first terminal can estimate the transmitted modulation symbols of the joint modulation using ML detection, whereinThe first two bits in each modulation symbol may represent the second terminal u ₂ The last two bits represent the first terminal u ₁ So that the first terminal can obtain the bit sequence corresponding to the first terminal and the bit sequence corresponding to the second terminal.

Further, for the modulation symbol estimated by ML detection, the first terminal may discard the first two bits and reserve the second two bits, thereby obtaining a bit sequence corresponding to the first terminal. Correspondingly, for the modulation symbol estimated by using ML detection, the second terminal may discard the second two bits and reserve the first two bits, thereby obtaining the bit sequence corresponding to the second terminal.

S103, the first terminal carries out bit de-interleaving processing on the bit sequence to obtain first user information.

Wherein S103 may be an inverse process of S42.

From the above, the first terminal may decode to obtain the first user information according to the received first downlink signal. In the scheme of the embodiment of the application, the first terminal obtains the LLR of each information bit according to the joint constellation diagram, and finally obtains the corresponding user information. Correspondingly, the second terminal can also obtain the second user information through decoding by the scheme. Compared with the traditional scheme using SIC detection, the method has the advantages that the complexity of demodulation processing by adopting ML detection is lower, signaling overhead is reduced, paired error probability is reduced, and specific user performance is improved.

In case the above mentioned network device transmits downlink signals on different downlink frequency domain resources, the first terminal also receives downlink signals on different downlink frequency domain resources.

Specifically, the first terminal may receive a first downlink signal on a first frequency domain resource and a second downlink signal on a second frequency domain resource.

For the received first downlink signal, the first terminal may perform S92 to demodulate the first downlink signal according to the first weight set, the first power factor, and the second power factor, to obtain a first demodulation result. The first demodulation result may include first user information and second user information obtained by demodulation according to the first weight value group, the first power factor and the second power factor.

For the received second downlink signal, the first terminal may perform S92 to demodulate the second downlink signal according to the second weight set, the third power factor, and the fourth power factor, to obtain a second demodulation result. The second demodulation result may include first user information and second user information obtained by demodulation according to the second weight value group, the third power factor and the fourth power factor.

For more details on the first terminal demodulating the second downlink signal according to the second weight set, the third power factor and the fourth power factor, reference may be made to the description related to fig. 9 and fig. 10, which are not repeated here.

Further, the first terminal may obtain the first user information according to the first demodulation result and the second demodulation result.

Referring to fig. 11, fig. 11 is a flowchart of a fourth method for data transmission according to an embodiment of the present application. Referring to fig. 12, fig. 12 is a schematic architecture diagram of a fourth data transmission method in an embodiment of the present application.

In the data transmission methods shown in fig. 11 and 12, different sets of weighting values are used in different frequency domain resources to give consideration to the error rates of the first user information and the second user information.

As shown in fig. 11, in S54, a weighting process may be performed on the modulation symbol corresponding to the first user information in the joint constellation according to the third weighting value and the third power factor, so as to obtain a fifth signal; and carrying out weighting processing on the modulation symbols corresponding to the second user information in the joint constellation diagram according to the fourth weighting value and the fourth power factor to obtain a sixth signal. S54 and S44 differ in the weighting value sets used for the weighting process. For more details regarding S54, reference is made to the descriptions related to S22 and S44 above, and will not be repeated here.

Further, the fifth signal and the sixth signal may be superimposed to obtain a seventh signal.

Further, in S55, the seventh signal may be subjected to interleaving processing to obtain a second downlink signal.

In a specific implementation of S55, the real component of the seventh signal is interleaved, and/or the imaginary component of the seventh signal is interleaved, to obtain the second downlink signal. Wherein the real component signal and the imaginary component signal of the second downlink signal are uncorrelated. The interleaving depth employed in S55 and the interleaving depth employed in S23 (or S45) may be the same.

For more details on the processing of the fifth signal and the sixth signal, reference may be made to the related description of S23 in fig. 2, which is not repeated here.

With continued reference to fig. 11, in S56, RE mapping may be performed on the first downlink signal and RE mapping may be performed on the second downlink signal.

In a specific implementation, a second frequency domain resource corresponding to the second weight value set may be determined according to the second weight value set, and then a second downlink signal is sent on the second frequency domain resource. Wherein the second frequency domain resource is different from the first frequency domain resource.

For more details on the data transmission method shown in fig. 11, reference may be made to the above related description, and the description is omitted here.

Referring to fig. 13, fig. 13 is a schematic diagram of data interaction of a method for data transmission in an embodiment of the present application. Fig. 13 shows a scenario in which a network device configures indication information to a terminal in a scenario of cell handover. The method of data transmission shown in fig. 13 may include S130 to S145:

s130, the source base station transmits B1 event measurement control to the UE.

When the UE has uplink data, the source base station transmits B1 event measurement control to the UE.

S131, the UE reports the B1 event measurement report to the source base station.

The B1 event measurement report may include the strongest neighbor cell found by the UE searching and using a New Radio (NR) access Technology (Technology AT). The UE indicates the target base station to the source base station by reporting the B1 event measurement report.

S132, the source base station sends an adding request to the target base station.

In a specific implementation, the target base station may be a base station corresponding to the strongest neighbor cell in the B1 event measurement report, and the source base station sends an addition request to the target base station.

S133, the target base station replies an addition confirmation to the source base station.

In response to receiving the addition request, the target base station may send an addition acknowledgement message to the source base station to indicate that the source base station agrees to the handover.

S134, the source base station sends RRC reconfiguration information to the UE.

After receiving the addition confirmation message sent by the target base station, the source base station sends an RRC reconfiguration message to the UE, and establishes an NR bearer.

And S135, the UE sends a configuration completion message to the source base station.

The UE sends a configuration complete message to the source base station to inform the source base station that RRC reconfiguration is complete.

S136, the source base station sends a configuration completion message to the target base station.

The source base station sends a configuration completion message to the target base station to inform the target base station that the UE RRC reconfiguration is completed.

And S137, the source base station sends bearing change knowledge to the core network.

The source base station sends a bearer change message to the core network to inform the core network UE of the bearer change.

And S138, the core network replies a bearing change confirmation to the source base station.

And S139, the UE initiates random access to the target base station.

And S140, the core network sends bearing change knowledge to the target base station.

S141, the target base station replies a load change confirmation to the core network.

S142, the target base station sends a reference signal to the UE.

S143, the UE transmits channel quality indication (Channel Quality Indicator, abbreviated CQI) information to the target base station.

The UE measures the reference signal to estimate the current channel quality and obtain CQI information.

S144, the target base station performs resource scheduling according to the CQI information.

The target base station may configure the UE in NOMA mode and schedule resources for the UE. The resource schedule may include one or more of the following: user pairing is performed according to the CQI information, power allocation is determined, a first weight value group and/or a second weight value group are determined, and the like.

And S145, the target base station sends indication information to the UE.

The indication information may include any one or more of the following: the method comprises the steps of a first weighted value group, a second weighted value group, a first power factor, a second power factor, an interleaving depth, a first frequency domain resource and a second frequency domain resource.

Further, the target base station may send a downlink signal to the UE, where the downlink signal may include the first downlink signal and/or the second downlink signal.

For more details on the indication information and the downlink signal, reference may be made to the descriptions related to fig. 1 to 12, which are not repeated here.

The following describes the derivation process of the formula (2).

First, the first terminal u can be obtained by shannon's formula, respectively ₁ And a second terminal u ₂ Channel capacity of (c):

wherein,for the channel capacity of the first terminal, +.>For the channel capacity of the second terminal, +.>Represents u ₁ Link equivalent SNR, +.>Represents u ₂ Link equivalent SNR, sigma of (2) ₁ Sigma, noise of the first downlink ₂ Alpha, which is noise of the second downlink ₁ ＝1-α ₂ 。

Further, a weighted sum rate C is defined _sum For the evaluation index, the expression is:

further, willRespectively using C _sum 、C ₁ 、C ₂ Instead of. Let->Obtaining:

to solve forDemand out->And->I.e.

Order theObtain the optimal second power division factor +.>The method comprises the following steps:

the optimal first power division factor can thus be obtained as:equation (24) is equation (2) above.

For more details regarding the first power factor and the second power factor, reference may be made to the relevant description regarding fig. 1, and no further description is given here.

The following describes, without limitation, the calculation of the set of weights. In a specific implementation, the first weighted value set and the second weighted value set may be calculated by the network device through a method described below, or may be calculated in advance through a method described below to obtain a plurality of weighted value sets, and configured in advance to the network device, which is not limited in this embodiment of the present application.

In a specific implementation, the bit error rate function may be constructed first.

Specifically, s is ⁽ⁱ⁾ The ith symbol, u, represented as a joint constellation ₁ Or u ₂ The bit error rate (Symbol Error Rate, SER for short) of (c) can be expressed by the formula (25):

Wherein G is the size of the joint constellation, i.e., G is the number of symbols in the joint constellation; p(s) ⁽ⁱ⁾ →s ^(k) ) Is s ⁽ⁱ⁾ Is falsely detected as s ^(k) I.e. the probability of P(s) ⁽ⁱ⁾ →s ^(k) ) Is s ⁽ⁱ⁾ Sum s ^(k) Paired error-probability (PEP) between them.

In addition, since the joint constellation diagram shown in fig. 5 is modulated by using a QPSK modulation method, symbol pairs that cannot be erroneously detected need to be removed when constructing the bit error rate function. Y in formula (25) ⁽ⁱ⁾ I.e. the corresponding symbols do not constitute a set of specific user errors.

For u ₁ If s ⁽¹⁾ Is falsely detected as s ⁽⁶⁾ No error occurs. This is because of s ⁽¹⁾ 、s ⁽⁶⁾ Has the same last two bits and both bits will be solved as "00". Such events do not lead to symbol errors, so s ⁽¹⁾ Is falsely detected as s ⁽⁶⁾ The case of (2) should be excluded from the summation in equation (25).

More specifically, taking the joint constellation shown in FIG. 5 as an example, u ₁ The set of non-constituent errors includes:

correspondingly, u ₂ The set of non-constituent errors includes:

in other words, no error detection occurs between any two symbols belonging to the same non-constituent error set.

Thus, it can be further expressed by equation (25):

Since in the complex power domain the symbol s is θ ₁ 、θ ₂ Thus the upper bound D (θ) of SER in equation (26) ₁ ,θ ₂ ) Also is theta ₁ 、θ ₂ Is a function of (2).

It should be noted that, the formula (26) is an error rate function in the case of optimizing only the first terminal or the second terminal (i.e., the first optimization objective or the second optimization objective described above) in the paired user group.

In case of simultaneously optimizing the first terminal and the second terminal in the paired user group (i.e. the third optimization objective described above), the bit error rate function may be expressed as

Further, by minimizing D (θ ₁ ,θ ₂ ) An optimal weighting value can be obtained. Further, the optimal weighting value may be quantized. In an implementation, it can be according to pi/2 ⁿ Quantizing the optimal weighting value to obtain a first weighting value theta ₁ And a second weighting value theta ₂ . Wherein n is more than or equal to 1 and less than or equal to 7.

It will be appreciated that in a specific implementation, the method may be implemented in a software program running on a processor integrated within a chip or a chip module; alternatively, the method may be implemented in hardware or a combination of hardware and software, for example, implemented in a dedicated chip or chip module, or implemented in a dedicated chip or chip module in combination with a software program.

It should be understood that the above embodiments may be used alone or in combination with each other to achieve different technical effects.

Referring to fig. 14, fig. 14 is a schematic structural diagram of a first communication apparatus in an embodiment of the present application, where the communication apparatus shown in fig. 14 may be disposed in the network device, and the apparatus shown in fig. 14 may include: a processing module 141 and a communication module 142;

a processing module 141, configured to determine a first weighted value set, process the first user information according to the first weighted value and a first power factor to obtain a first signal, and process the second user information according to the second weighted value and a second power factor to obtain a second signal; processing the first signal and the second signal to obtain a first downlink signal; wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of first user information, the second weighting value is used for adjusting the phase of second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information;

And a communication module 142, configured to send the first downlink signal.

In a specific implementation, the communication apparatus shown in fig. 14 may correspond to a chip having a communication function in a network device; or corresponds to a chip or a chip module having a communication function included in the network device, or corresponds to the network device.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a second communication device in the embodiment of the present application, and the communication device shown in fig. 15 may be disposed at the above-mentioned terminal, more specifically, may be disposed at the above-mentioned first terminal, or may be disposed at the above-mentioned second terminal. The apparatus shown in fig. 15 may include a processing module 151 and a communication module 152.

The communication module 151 is configured to receive a first downlink signal.

The processing module 152 is configured to demodulate the first downlink signal according to the first weight set, the first power factor, and the second power factor, to obtain first user information and second user information; wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of the first user information, the second weighting value is used for adjusting the phase of the second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information.

In a specific implementation, the above-mentioned communication device may correspond to a chip having a communication function in the terminal; or corresponds to a chip or a chip module having a communication function included in the terminal, or corresponds to the terminal.

For more matters such as the working principle, the working method, the beneficial effects and the like of the communication device in the embodiments of the present application, reference may be made to the above related description about the method of data transmission, which is not repeated here.

The embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method of data transmission described above. The storage medium may include ROM, RAM, magnetic or optical disks, and the like. The storage medium may also include a non-volatile memory (non-volatile) or a non-transitory memory (non-transitory) or the like.

The embodiment of the application also provides a third communication device, which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the steps of the data transmission method when running the computer program. The communication device may be the above network device, the above first terminal, or the above second terminal.

Referring to fig. 16, fig. 16 is a schematic structural diagram of a third communication device in an embodiment of the present application. The communication device shown in fig. 16 includes a memory 161 and a processor 162, the processor 162 and the memory 161 are coupled, and the memory 161 may be located inside the communication device or may be located outside the communication device. The memory 161 and the processor 162 may be connected by a communication bus. The memory 131 stores thereon a computer program executable on the processor 162, and the processor 162 executes the steps of the data transmission method provided in the above embodiment when executing the computer program.

It should be appreciated that in the embodiments of the present application, the processor may be a central processing unit (central processing unit, abbreviated as CPU), and the processor may also be other general purpose processors, digital signal processors (digital signal processor, abbreviated as DSP), application specific integrated circuits (application specific integrated circuit, abbreviated as ASIC), off-the-shelf programmable gate arrays (field programmable gate array, abbreviated as FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically erasable ROM (electrically EPROM, EEPROM), or a flash memory. The volatile memory may be a random access memory (random access memory, RAM for short) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, abbreviated as RAM) are available, such as static random access memory (static RAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, abbreviated as DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus random access memory (direct rambus RAM, abbreviated as DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program may be stored in or transmitted from one computer readable storage medium to another, for example, by wired or wireless means from one website, computer, server, or data center.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and system may be implemented in other manners. For example, the device embodiments described above are merely illustrative; for example, the division of the units is only one logic function division, and other division modes can be adopted in actual implementation; for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may be physically included separately, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units. For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented in hardware such as a circuit, or at least part of the modules/units may be implemented in software program, where the software program runs on a processor integrated inside the chip, and the rest (if any) of the modules/units may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module/unit contained in the device and product can be realized in a hardware manner such as a circuit, different modules/units can be located in the same component (such as a chip, a circuit module and the like) or different components of the chip module, or at least part of the modules/units can be realized in a software program, the software program runs on a processor integrated in the chip module, and the rest (if any) of the modules/units can be realized in a hardware manner such as a circuit; for each device, product, or application to or integrated with the terminal, each module/unit included in the device, product, or application may be implemented by using hardware such as a circuit, different modules/units may be located in the same component (for example, a chip, a circuit module, or the like) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program, where the software program runs on a processor integrated inside the terminal, and the remaining (if any) part of the modules/units may be implemented by using hardware such as a circuit.

The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" indicates that the front and rear associated objects are an "or" relationship.

The term "plurality" as used in the embodiments herein refers to two or more.

The first, second, etc. descriptions in the embodiments of the present application are only used for illustrating and distinguishing the description objects, and no order division is used, nor does it indicate that the number of the devices in the embodiments of the present application is particularly limited, and no limitation on the embodiments of the present application should be construed.

Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention shall be defined by the appended claims.

Claims

1. A method of data transmission, comprising:

determining a first set of weight values, the first set of weight values comprising: the system comprises a first weighted value and a second weighted value, wherein the first weighted value is used for adjusting the phase of first user information, and the second weighted value is used for adjusting the phase of second user information;

processing the first user information according to the first weighted value and the first power factor to obtain a first signal; processing the second user information according to the second weighted value and a second power factor to obtain a second signal, wherein the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information;

processing the first signal and the second signal to obtain a first downlink signal;

and sending the first downlink signal.

2. The method of claim 1, wherein the determining the first set of weight values comprises:

determining the first weighted value group from at least one weighted value group according to the first power factor, wherein the first weighted value group corresponds to the first power factor; and/or the number of the groups of groups,

and determining the first weighted value group from the at least one weighted value group according to the second power factor, wherein the first weighted value group corresponds to the second power factor.

3. The method according to claim 1, wherein the method further comprises:

determining the first power factor and/or the second power factor according to the signal-to-noise ratio SNR of the first downlink and the SNR of the second downlink;

wherein the first downlink is a downlink between the transmitting end of the first downlink signal and the receiving end of the first user information, and the second downlink is a downlink between the transmitting end of the first downlink signal and the receiving end of the second user information.

4. The method according to claim 1, wherein the method further comprises:

transmitting indication information, wherein the indication information is used for indicating any one or more of the following: the first weighting value set, the first power factor, the second power factor.

5. The method of claim 1, wherein an absolute value of a difference between a first reference signal received power, RSRP, and a second RSRP is greater than or equal to a first threshold, wherein the first RSRP is an RSRP of a receiving end of the first user information and the second RSRP is an RSRP of a receiving end of the second user information.

6. The method of claim 1, wherein the first downlink signal comprises a real component signal and an imaginary component signal, and wherein the real component signal and the imaginary component signal are uncorrelated.

7. The method of claim 1, wherein processing the first signal and the second signal to obtain a first downlink signal comprises:

performing superposition processing on the first signal and the second signal to obtain a third signal, wherein the third signal comprises a first path of signal and a second path of signal;

performing interleaving treatment on the first path of signals; and/or, performing interleaving processing on the second path of signals;

the first path signal is a real component of the third signal, the second path signal is an imaginary component of the third signal, or the first path signal is an imaginary component of the third signal, and the second path signal is a real component of the third signal.

8. The method of claim 1, wherein the transmitting the first downlink signal comprises:

and transmitting the first downlink signal on a first frequency domain resource, wherein the first frequency domain resource is a downlink frequency domain resource corresponding to the first weighted value group.

9. The method of claim 8, wherein the downlink frequency domain resources for transmitting signals further comprise second frequency domain resources, the method further comprising:

transmitting a second downlink signal on the second frequency domain resource;

the second frequency domain resource is a downlink frequency domain resource corresponding to a second weighted value group; the second weighted value group corresponds to a third power factor, the third power factor is used for adjusting the amplitude of the first user information or the second user information, and the second downlink signal is obtained by processing the first user information and the second user information according to the second weighted value group and the third power factor.

10. The method of claim 9, wherein the third power factor is used to adjust the magnitude of the first user information, and wherein the third power factor is the same as the first power factor; alternatively, the third power factor is used to adjust the amplitude of the second user information, and the third power factor is the same as the second power factor.

11. The data transmission method according to claim 1, wherein the first weight value satisfies the following expression:

wherein said θ ₁ Is the first weighted value, and n ₁ Is an integer of 0.ltoreq.n ₁ N is less than or equal to N, and N is a positive integer.

12. The data transmission method according to claim 1, wherein the second weighting value satisfies the following expression:

wherein said θ ₂ Is the second weighted value, and n ₂ Is an integer of 0.ltoreq.n ₂ N is less than or equal to N, and N is a positive integer.

13. A method of data transmission, comprising:

receiving a first downlink signal;

demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain first user information and second user information;

wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of the first user information, the second weighting value is used for adjusting the phase of the second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information.

14. The method of claim 13, wherein the method further comprises:

Receiving indication information, wherein the indication information is used for indicating any one or more of the following: the first weighting value set, the first power factor, the second power factor.

15. The method of claim 13 or 14, wherein the first downlink signal comprises a real component signal and an imaginary component signal, and wherein the real component signal and the imaginary component signal are uncorrelated.

16. The data transmission method according to claim 13, wherein the first weight value satisfies the following expression:

17. The data transmission method according to claim 13, wherein the second weighting value satisfies the following expression:

18. The method of claim 13, wherein the receiving the first downlink signal comprises:

receiving the first downlink signal on a first frequency domain resource; wherein the first frequency domain resource corresponds to the first set of weights.

19. The method of claim 18, wherein the method further comprises:

Receiving a second downlink signal on a second frequency domain resource; the second frequency domain resource corresponds to a second weighted value group, the second weighted value group corresponds to a third power factor, and the third power factor is used for adjusting the amplitude of the first user information or the second user information;

and demodulating the second downlink signal according to the second weighted value group and the third power factor.

20. The method of claim 19, wherein the third power factor is used to adjust the magnitude of the first user information, and wherein the third power factor is the same as the first power factor; alternatively, the third power factor is used to adjust the amplitude of the second user information, and the third power factor is the same as the second power factor.

21. The method of claim 19, wherein demodulating the first downlink signal according to the first set of weights, the first power factor, and the second power factor to obtain the first user information and the second user information comprises:

demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain a first demodulation result;

And processing the first demodulation result and the demodulation result of demodulating the second downlink signal to obtain the first user information and the second user information.

22. A communication device, comprising: the processing module and the communication module are used for processing the data;

the processing module is used for determining a first weighted value group, processing the first user information according to the first weighted value and a first power factor to obtain a first signal, and processing the second user information according to the second weighted value and a second power factor to obtain a second signal; processing the first signal and the second signal to obtain a first downlink signal;

wherein the first weight group includes: the system comprises a first weighting value and a second weighting value, wherein the first weighting value is used for adjusting the phase of first user information, the second weighting value is used for adjusting the phase of second user information, the first power factor is used for adjusting the amplitude of the first user information, and the second power factor is used for adjusting the amplitude of the second user information;

the communication module is configured to send the first downlink signal.

23. A communication device, comprising: the processing module and the communication module are used for processing the data;

the communication module is used for receiving a first downlink signal;

the processing module is used for demodulating the first downlink signal according to the first weighted value group, the first power factor and the second power factor to obtain first user information and second user information;

24. A computer-readable storage medium, on which a computer program is stored which, when run by a processor, causes the data transmission method of any one of claims 1 to 12 to be performed.

25. A computer-readable storage medium, on which a computer program is stored which, when run by a processor, causes the data transmission method of any one of claims 13 to 21 to be performed.

26. A communication device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor executing the steps of the data transmission method according to any of claims 1 to 12 when the computer program is executed.

27. A communication device comprising a memory and a processor, the memory having stored thereon a computer program executable on the processor, the processor executing the steps of the data transmission method of any of claims 13 to 21 when the computer program is executed.