Information sending method and related equipment

Abstract

Provided are an information sending method and related equipment, relating to the technical field of communications, the method comprising: inputting preset demand parameters into a pre-constructed optimization model, the preset demand parameters comprising channel coefficients, noise indexes and constraint condition parameters between N terminals and a base station in a cell, N being an integer greater than or equal to 1; the optimization model takes maximization of a system performance index as a target, the output sending power of the public information of the N terminals and the output sending power corresponding to the private information of the N terminals are obtained, and the system performance index is determined based on the public information rate and the private information rate of the N terminals; and on the same time-frequency resource, respectively sending the public information to the N terminals according to the sending power of the public information, and respectively sending the private information of the N terminals to the N terminals according to the sending power corresponding to the private information of the N terminals. The invention can improve the communication quality of the user.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a method for sending information and related devices. Background Art

[0002] Rate Splitting Multiple Access (RSMA) uses interference splitting technology to split the data of each user into common messages (CM) and private messages (PM) according to a rate splitting strategy. However, in current RSMA, due to the unreasonable allocation of the transmission power of common information and private information, the communication quality of users is poor. Summary of the Invention

[0003] Embodiments of the present invention provide a method for sending information and related devices to solve the problem in the prior art that in RSMA, the transmission power of common information and private information is not reasonably allocated, resulting in poor communication quality of users.

[0004] To solve the above technical problem, the present invention is implemented as follows:

[0005] In a first aspect, an embodiment of the present invention provides a method for sending information, which is applied to a network-side device, and the method includes:

[0006] Input a preset demand parameter into a pre-constructed optimization model, where the preset demand parameter includes channel coefficients between N terminals in a cell and a base station, a noise index, and constraint condition parameters, and N is an integer greater than or equal to 1;

[0007] Obtain the transmission power of the common information of the N terminals output by the optimization model with the goal of maximizing a system performance index, and the transmission power corresponding to the private information of the N terminals output, where the system performance index is determined based on the common information rate and private information rate of the N terminals;

[0008] On the same time-frequency resource, send the common information to the N terminals according to the transmission power of the common information, and send the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0009] Optionally, the private information of the N terminals is the service data of the N terminals;

[0010] The common information includes any one of the following:

[0011] Broadcast service data;

[0012] Multicast service data;

[0013] System broadcast message;

[0014] Paging message.

[0015] Optionally, after sending the common information to the N terminals respectively according to the transmission power of the common information, and sending the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals, the method further includes:

[0016] Sending first downlink control information DCI and first demodulation reference signal to the N terminals respectively, and sending corresponding second DCI and second demodulation reference signal to the N terminals;

[0017] The first DCI is used to schedule the common information, and the first demodulation reference signal is used to demodulate the common information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal, where the first terminal is any one of the N terminals.

[0018] Optionally,

[0019] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resource of the common information, and the second indication message is used to indicate whether there is common information on the time-frequency resource of the private information.

[0020] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0021] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0022] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the common information;

[0023] The second PDCI corresponding to the first terminal also carries a fourth indication message and a fifth indication message corresponding to the first terminal, where the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0024] Optionally, at least one of the following differences exists between the first reference signal and the second demodulation reference signals corresponding to the N terminals:

[0025] The sequence of the reference signal;

[0026] The resources to which the reference signal is mapped, where the resources to which the reference signal is mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0027] The transmission power of the reference signal.

[0028] In a second aspect, an embodiment of the present invention further provides an information sending method, which is applied to a terminal, and the terminal is a first terminal. The method includes:

[0029] Receiving, on the same time-frequency resources, the public information sent by the network-side device according to the transmission power of the public information of the N terminals, and receiving the private information of the N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0030] Wherein, the transmission powers of the public information and the private information are respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the public information rate and private information rate of the N terminals.

[0031] Optionally, the private information of the N terminals is the service data of the N terminals;

[0032] The public information includes any one of the following:

[0033] Broadcast service data;

[0034] Multicast service data;

[0035] System broadcast message;

[0036] Paging message.

[0037] Optionally, after receiving the common information sent by the receiving network-side device according to the transmission power of the common information of N terminals, and receiving the private information of the N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal, the method further includes:

[0038] Receiving a first downlink control information DCI and a first demodulation reference signal, and receiving a second DCI and a second demodulation reference signal corresponding to the first terminal;

[0039] Scheduling the common information according to the first DCI, and demodulating the common information according to the first demodulation reference signal;

[0040] Scheduling the private information of the first terminal according to the second DCI corresponding to the first terminal, and demodulating the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

[0041] Optionally, before scheduling the private information of the first terminal according to the second DCI corresponding to the first terminal, the method further includes:

[0042] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. When the first indication message and / or the second indication message indicates that there is the common information and the private information on the same time-frequency resource, after demodulating the common information, the demodulated common information is removed according to the first DCI;

[0043] Wherein, the first indication message is used to indicate whether there is the private information on the time-frequency resource of the common information, and the second indication message is used to indicate whether there is the common information on the time-frequency resource of the private information.

[0044] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal;

[0045] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal.

[0046] Optionally, the first DCI further carries a third indication message, and the third indication message is used to indicate the transmission power of the common information;

[0047] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal, where the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0048] In a third aspect, an embodiment of the present invention further provides a network-side device, including:

[0049] An input module, configured to input preset demand parameters into a pre-constructed optimization model, where the preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise exponent, and constraint condition parameters, and N is an integer greater than or equal to 1;

[0050] An acquisition module, configured to acquire the transmission power of the public information of the N terminals output by the optimization model with the goal of maximizing the system performance index, and the transmission power corresponding to the private information of the N terminals, where the system performance index is determined based on the public information rate and the private information rate of the N terminals;

[0051] A first transmission module, configured to transmit the public information to the N terminals respectively according to the transmission power of the public information on the same time-frequency resources, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0052] Optionally, the private information of the N terminals is service data of the N terminals;

[0053] The public information includes any one of the following:

[0054] Broadcast service data;

[0055] Multicast service data;

[0056] System broadcast message;

[0057] Paging message.

[0058] Optionally, the network-side device further includes:

[0059] A second transmission module, configured to transmit a first downlink control information DCI and a first demodulation reference signal to the N terminals respectively, and transmit a corresponding second DCI and a second demodulation reference signal to the N terminals;

[0060] The first DCI is used to schedule the public information, and the first demodulation reference signal is used to demodulate the public information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal. The first terminal is any one of the N terminals.

[0061] Optionally,

[0062] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resources of the public information, and the second indication message is used to indicate whether there is public information on the time-frequency resources of the private information.

[0063] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0064] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0065] Optionally, the first DCI also carries a third indication message, and the third indication message is used to determine the transmission power of the public information;

[0066] The second PDCCH corresponding to the first terminal also carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0067] Optionally, there is at least one of the following differences between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals:

[0068] The sequence of the reference signal;

[0069] The resources to which the reference signal is mapped, and the resources to which the reference signal is mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0070] The transmission power of the reference signal.

[0071] In a fourth aspect, an embodiment of the present invention further provides a terminal, where the terminal is a first terminal, and the first terminal includes:

[0072] A first receiving module, configured to receive, on the same time-frequency resource, the public information sent by a network-side device according to the transmission power of the public information of N terminals, and receive the private information of the N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0073] Wherein, the transmission powers of the public information and the private information are respectively output by an optimized model constructed in advance with the goal of maximizing a system performance index, and the system performance index is determined based on the public information rate and the private information rate of the N terminals.

[0074] Optionally, the private information of the N terminals is service data of the N terminals;

[0075] The public information includes any one of the following:

[0076] Broadcast service data;

[0077] Multicast service data;

[0078] System broadcast message;

[0079] Paging message.

[0080] Optionally, the first terminal further includes:

[0081] A second receiving module, configured to receive a first downlink control information DCI and a first demodulation reference signal sent by a network-side device, and receive a second DCI and a second demodulation reference signal corresponding to the first terminal;

[0082] A first scheduling module: configured to schedule the public information according to the first DCI

[0083] A first demodulation module, configured to demodulate the public information according to the first demodulation reference signal;

[0084] A second scheduling module, configured to schedule the private information of the first terminal according to the second DCI corresponding to the first terminal;

[0085] A second demodulation module, configured to demodulate the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

[0086] Optionally, the first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first terminal further includes: a removal module, configured to, when the first indication message and / or the second indication message indicates that the common information and the private information exist on the same time-frequency resource, after demodulating the common information, remove the demodulated common information according to the first DCI;

[0087] Wherein, the first indication message is used to indicate whether the private information exists on the time-frequency resource of the common information, and the second indication message is used to indicate whether the common information exists on the time-frequency resource of the private information.

[0088] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal;

[0089] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first cancellation indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal.

[0090] Optionally, the first DCI further carries a third indication message, and the third indication message is used to indicate the transmission power of the common information;

[0091] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Wherein, the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resource of the private information of the first terminal.

[0092] In a fifth aspect, an embodiment of the present invention further provides a network-side device, including a transceiver and a processor,

[0093] The processor is configured to input preset demand parameters into a pre-constructed optimization model. The preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise index, and constraint condition parameters, where N is an integer greater than or equal to 1

[0094] The processor is further configured to obtain the transmission power of the common information of the N terminals and the transmission power corresponding to the private information of the N terminals output by the optimization model with the goal of maximizing the system performance metric, where the system performance metric is determined based on the common information rate and the private information rate of the N terminals;

[0095] The transceiver is configured to transmit the common information to the N terminals respectively according to the transmission power of the common information on the same time-frequency resource, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0096] Optionally, the private information of the N terminals is the service data of the N terminals;

[0097] The common information includes any one of the following:

[0098] Broadcast service data;

[0099] Multicast service data;

[0100] System broadcast message;

[0101] Paging message.

[0102] Optionally, the transceiver is further configured to:

[0103] Transmit the first downlink control information DCI and the first demodulation reference signal to the N terminals respectively, and transmit the corresponding second DCI and the second demodulation reference signal to the N terminals;

[0104] The first DCI is used to schedule the common information, and the first demodulation reference signal is used to demodulate the common information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal, where the first terminal is any one of the N terminals.

[0105] Optionally

[0106] The first DCI carries a first indication message, and / or, the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resource of the common information, and the second indication message is used to indicate whether there is common information on the time-frequency resource of the private information.

[0107] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0108] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0109] Optionally, the first DCI further carries a third indication message for indicating the transmission power of public information;

[0110] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal, where the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0111] Optionally, at least one of the following differences exists between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals:

[0112] The sequence of the reference signal;

[0113] The resources to which the reference signal is mapped, where the resources to which the reference signal is mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0114] The transmission power of the reference signal.

[0115] In a sixth aspect, an embodiment of the present invention further provides a terminal, where the terminal is a first terminal, and the first terminal includes a transceiver and a processor.

[0116] The transceiver is configured to receive, on the same time-frequency resources, the public information sent by the network-side device according to the transmission power of the public information of the N terminals, and receive the private information of the N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0117] Wherein, the transmission powers of the public information and the private information are respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the public information rate and the private information rate of the N terminals.

[0118] Optionally, the private information of the N terminals is the service data of the N terminals;

[0119] The public information includes any one of the following:

[0120] Broadcast service data;

[0121] Multicast service data;

[0122] System broadcast message;

[0123] Paging message.

[0124] Optionally, the transceiver is further configured to receive a first downlink control information DCI and a first demodulation reference signal, and receive a second DCI and a second demodulation reference signal corresponding to the first terminal;

[0125] The processor is configured to schedule the public information according to the first DCI, demodulate the public information according to the first demodulation reference signal, schedule the private information of the first terminal according to the second DCI corresponding to the first terminal, and demodulate the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

[0126] Optionally, the processor is specifically configured to:

[0127] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. When the first indication message and / or the second indication message indicates that there is the public information and the private information on the same time-frequency resource, after demodulating the public information, the demodulated public information is removed according to the first DCI;

[0128] Wherein, the first indication message is used to indicate whether there is the private information on the time-frequency resource of the public information, and the second indication message is used to indicate whether there is the public information on the time-frequency resource of the private information.

[0129] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal;

[0130] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal.

[0131] Optionally, the first DCI further carries a third indication message for indicating the transmission power of public information.

[0132] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0133] In a seventh aspect, an embodiment of the present invention further provides a network-side device, including: a processor, a memory, and a program stored on the memory and executable on the processor. When the program is executed by the processor, the steps of the information transmission method described in the first aspect are implemented.

[0134] In an eighth aspect, an embodiment of the present invention further provides a terminal, including: a processor, a memory, and a program stored on the memory and executable on the processor. When the program is executed by the processor, the steps of the information transmission method described in the second aspect are implemented.

[0135] In a ninth aspect, an embodiment of the present invention further provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the steps of the information transmission method described in the first aspect are implemented; or, when the computer program is executed by the processor, the steps of the information transmission method described in the second aspect are implemented.

[0136] In the embodiments of the present invention, preset demand parameters are input into a pre-constructed optimization model. The preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise index, and constraint condition parameters. The optimization model is based on the input preset demand parameters and aims to maximize the system performance index, outputting the transmission power of the public information of the N terminals and the transmission power corresponding to the private information of the N terminals output. It can be seen that the optimization model in the embodiments of the present invention aims to maximize the system performance index. By obtaining the transmission power of the public information output by the optimization model and the transmission power corresponding to the private information in the cell, and sending the public information and the private information respectively according to the transmission power of the public information and the transmission power corresponding to the private information in the cell, the system performance can be effectively improved, thereby improving the communication quality of users. Description of the Drawings

[0137] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0138] Figure 1 is one of the flowcharts of an information sending method provided by an embodiment of the present invention;

[0139] Figure 2 is the second flowchart of an information sending method provided by an embodiment of the present invention;

[0140] Figure 3 is one of the structural schematic diagrams of a network-side device provided by an embodiment of the present invention;

[0141] Figure 4 is one of the structural schematic diagrams of a terminal provided by an embodiment of the present invention;

[0142] Figure 5 is the second structural schematic diagram of a network-side device provided by an embodiment of the present invention;

[0143] Figure 6 is the second structural schematic diagram of a terminal provided by an embodiment of the present invention. Detailed implementation manners

[0144] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0145] In the embodiments of the present invention, an information sending method and related devices are proposed to solve the problem in the prior art that RSMA does not reasonably allocate the transmission power of public information and private information, resulting in poor communication quality of users.

[0146] See Figure 1 , Figure 1 is one of the flowcharts of an information sending method provided by an embodiment of the present invention, applied to a network-side device. As Figure 1 shown, the method includes the following steps:

[0147] Step 101, input the preset demand parameters into the pre-constructed optimization model. The preset demand parameters include the channel coefficients between N terminals in the cell and the base station, the noise index, and the constraint condition parameters, where N is an integer greater than or equal to 1;

[0148] Step 102: Obtain the transmission power of the common information of the N terminals output by the optimization model aiming to maximize the system performance index, and the transmission power corresponding to the private information of the N terminals. The system performance index is determined based on the common information rate and the private information rate of the N terminals.

[0149] Step 103: On the same time-frequency resource, send the common information to the N terminals respectively according to the transmission power of the common information, and send the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0150] The method of the embodiment of the present invention is applied to a network-side device, where the network-side device includes a base station.

[0151] In step 101, the network-side device inputs preset demand parameters into a pre-constructed optimization model. The preset demand parameters include the channel coefficients (h) between N terminals in the cell and the base station, the noise index (σ) between the N terminals and the base station, and constraint condition parameters. The constraint condition parameters are determined according to the terminal Quality of Service (QoS) requirements (such as information transmission rate requirements), transmission electric power constraints, linear working area constraints, interference cancellation constraints, and common information rate constraints, etc. By considering various constraint conditions, the communication reliability between the user and the network-side device can be ensured, and the communication quality requirements of the user can be met.

[0152] In step 102, the optimization model aims to maximize the performance index of the system and outputs the transmission power of the common information and the transmission power corresponding to the private information based on the input preset demand parameters. It should be noted that the transmission power in the embodiment of the present invention can be a specific power value or a power allocation factor.

[0153] The performance index of the system is determined according to the common information rate and the private information rate of the N terminals. The higher the sum value of the common information rate and the private information rate of the N terminals, the higher the performance index of the system. In some embodiments, the optimization model can also output the common information rate and the private information rate of the N terminals for calculating the transmission block size of the common information and the transmission block sizes corresponding to the respective private information.

[0154] In step 103, the network-side device sends public information and private information on the same time-frequency resource, thereby improving the resource utilization rate of the network-side device. Moreover, the network-side device sends the public information to N terminals respectively according to the transmission power of the public information obtained from the optimization model, and sends the private information of N terminals to N terminals respectively according to the transmission power corresponding to the private information of N terminals, which can effectively improve the performance indicators of the system.

[0155] In some embodiments, the optimization model is as follows:

[0156]

[0157]

[0158]

[0159]

[0160]

[0161]

[0162]

[0163] In this embodiment, the total rate of the public information and private information of K terminals is determined as the system performance indicator, and the objective function aims to maximize the total rate, where the parameter C k represents the public information rate of the user, p k represents the transmission power of the private information of terminal k, h k represents the channel coefficient between terminal k and the base station, σ k represents the noise exponent between terminal k and the base station, and λ is a constant.

[0164] The first constraint condition in the optimization model is used to ensure that the public information of all terminals can be successfully decoded, where h 1 represents the channel coefficient corresponding to the terminal with the minimum channel noise ratio among K terminals. In this embodiment, K terminals can be sorted in ascending order according to the channel noise ratio, that is:

[0165]

[0166] The second constraint condition in the optimization model indicates that terminal k needs to achieve the minimum transmission rate including the public information rate and the private information rate of terminal k. Among them, the minimum transmission rate can be determined based on the Qos requirements of terminal k, etc.

[0167] The third constraint condition in the optimization model indicates that the total transmission power of the common information and the private information of the K terminals cannot exceed the maximum transmission power of the base station.

[0168] The fourth constraint condition in the optimization model ensures that signal transmission devices such as LEDs or radio frequency power amplifiers operate in the linear region, representing the linear operating range of the base station.

[0169] The fifth constraint condition in the optimization model indicates that the transmission power needs to ensure the performance of successive interference cancellation (SIC), where θ is the minimum power difference to ensure SIC operation.

[0170] In this embodiment, the channel coefficient h of the input terminal, the noise exponent σ of the terminal, and the constraint condition parameters P max 、 and θ are input into the optimization model, and the optimization model can output the common information rate, private information rate, transmission power of the public information, and transmission power corresponding to the private information with the optimal system performance index as the goal.

[0171] To more clearly understand the technical solution of the embodiments of the present application, the following provides an exemplary description of the specific solution method for the above optimization problem.

[0172] Step 1: Introduce auxiliary variables {w k} and {f k} to represent the transmission power of the private information and the logarithm of the noise channel ratio respectively. At the same time, introduce a slack variable {γ k} to represent the logarithm of the signal-to-interference-plus-noise ratio of the terminal.

[0173]

[0174]

[0175]

[0176] Step 2: Set the initial values of the auxiliary variables and the slack variables as well as and set the iteration indicator m = 1.

[0177] Step 3: During the iteration process, use the results of the (m - 1)-th iteration and successive convex approximation to approximate the private information rate of terminal k as:

[0178]

[0179] The common information rate of the K terminals is approximated as:

[0180]

[0181] The power of the common information of K terminals is approximately:

[0182]

[0183] Step 4: Solve the convex optimization sub-problem: maximize the sum of the common information rate and the private information rate The constraint conditions include:

[0184] a. The private information can be decoded successfully:

[0185] b. The QoS constraint of the terminal:

[0186] c. The transmit power satisfies the SIC limit:

[0187] d. The linear working region constraint:

[0188] e. The transmit power constraint:

[0189] f. The SINR relaxation condition:

[0190] Step 5: Update m = m + 1, and return to step (4-3) until the system sum rate converges, that is, the optimal common information rate C is obtained k and the optimal transmit power of the private information and calculate the private information rate as

[0191] Step 6: The optimization model outputs the common information rate C k , the private information rate the transmit power of the public information the transmit power of the private information corresponding to terminal k

[0192] In the embodiments of the present invention, on the one hand, the network-side device sends common information and private information on the same time-frequency resource, so as to improve the resource utilization rate of the network-side device; on the other hand, by obtaining the transmit power of the common information output by the optimization model and the transmit power corresponding to the private information in the cell, and sending the common information and the private information respectively according to the transmit power of the common information and the transmit power corresponding to the private information in the cell, the system performance can be effectively improved, thereby improving the communication quality of users.

[0193] In the related technologies of the present invention: In order to improve the received signal-to-noise ratio of cell-edge users, the base station usually needs to configure a higher transmission power or a lower-order modulation and coding scheme (MCS), so as to improve the transmission reliability. However, this will result in a low resource utilization rate of the network-side device.

[0194] Optionally, considering the problems in the above related technologies, the private information of the N terminals is the service data of the N terminals;

[0195] The public information includes any one of the following:

[0196] Broadcast service data;

[0197] Multicast service data;

[0198] System broadcast message;

[0199] Paging message.

[0200] Among them, paging means that an idle-state terminal listens for paging initiated by the core network, and a non-active terminal listens for paging initiated by the core network and the base station. As a broadcast message, paging has strong coverage, and generally all users in the cell can receive the paging message and successfully decode it. In addition, broadcast service data, multicast service data, and system broadcast messages are all messages with strong coverage.

[0201] In a normal scenario, paging messages, broadcast service data, multicast service data, and system broadcast messages occupy different resources of the network-side device from the service data of users, that is, the network-side device usually sends the above messages on different time-frequency resources, which results in a low resource utilization rate of the network-side device. In the embodiments of the present application, the network-side device sends public information and the service data of the terminal on the same time-frequency resource, which can effectively improve the resource utilization rate of the network-side device. Moreover, paging messages, broadcast service data, multicast service data, and system broadcast messages have excellent coverage performance. The network-side device sends the above messages and the service data of the terminal on the same time-frequency resource, so as to utilize the high coverage performance of the above information, enabling cell-edge users to correctly demodulate data even when the received signal-to-noise ratio is low.

[0202] It should be noted that the network-side device can pre-judge whether there is service data of a terminal in the cell that can be sent on the same time-frequency resource as the above public information. When there is service data of N terminals in the cell that can be sent on the same time-frequency resource as the above public information, the transmission power of the public information and the transmission power of the service data of the user can be obtained according to the above embodiments, and on the same time-frequency resource, the public information is sent according to the transmission power of the public information, and the service data of the user is sent according to the transmission power corresponding to the user.

[0203] In an embodiment of the present invention, by setting the private information of N terminals as the service data of the N terminals and the public information as a message with strong coverage ability, when the network-side device sends the service data and public information of the terminals on the same resource, the resource utilization rate of the network-side device can be effectively improved, and moreover, the high coverage performance of the public information can be utilized to enable cell-edge users to correctly demodulate data even when the received signal-to-noise ratio is low.

[0204] Optionally, after sending the public information to the N terminals respectively according to the transmission power of the public information, and sending the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals, the method further includes:

[0205] Sending first downlink control information (Downlink Control Information, DCI) and a first demodulation reference signal to the N terminals respectively, and sending corresponding second DCI and a second demodulation reference signal to the N terminals, where the first DCI is used to schedule the public information, and the first demodulation reference signal is used to demodulate the public information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal, and the first terminal is any one of the N terminals.

[0206] After the terminal receives the public information and the private information, the network-side device sends the first DCI and the first demodulation reference signal, as well as the corresponding second DCI and the second demodulation reference signal to the terminal. Among them, the second DCI and the second demodulation reference signal corresponding to each of the N terminals are different.

[0207] The above first DCI and second DCI are sent on a physical downlink control channel (Physical Downlink Control Channel, PDCCH). The terminal blindly detects the PDCCH carrying the first DCI and / or the second DCI to obtain the first DCI and / or the second DCI. The first DCI indicates scheduling information such as the time-frequency resource of the scheduled public information and the MCS index table (index) of the public information; the second DCI indicates scheduling information such as the time-frequency resource of the scheduled private information and the MCS index table (index) of the private information.

[0208] According to the rate-splitting multiple access technology, after receiving the first DCI and the first demodulation reference signal, the terminal schedules the common information based on the first DCI and demodulates the common information based on the first demodulation reference signal. After demodulating the common information, the serial interference cancellation technology is used to remove the common information from the received information. After removing the common information using the serial interference cancellation technology, if the aforementioned N is greater than 1, that is, among the private information of the N terminals received by the terminal, there is private information of other terminals, then the private information of other terminals is regarded as interference. The terminal schedules its own private information according to the corresponding second DCI and demodulates its own private information according to the second demodulation reference signal, that is, the first terminal schedules the private information of the first terminal according to the second DCI corresponding to the first terminal and demodulates the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal. In the scenario where the private information of the N terminals is the service data of the N terminals and the common information includes broadcast service data, multicast service data, system broadcast messages, or paging messages, while the service data of the terminal can utilize the high coverage performance of the common information, after the terminal receives the first DCI and the first demodulation reference signal and receives the corresponding second DCI and second demodulation reference signal, it can also timely schedule and demodulate the service data of the terminal, thereby meeting the service requirements of the terminal.

[0209] In the embodiment of the present application, by receiving the first DCI and the first demodulation reference signal and receiving the corresponding second DCI and second demodulation reference signal, the terminal can timely schedule and demodulate the common information and its own private information, thereby effectively reducing the interference between the common information and the private information in the received information.

[0210] Optionally, the first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resources of the common information, and the second indication message is used to indicate whether there is common information on the time-frequency resources of the private information.

[0211] In this implementation manner, the first terminal needs to select whether to demodulate the private information after demodulating the common information according to the first indication message carried by the first DCI and / or the second indication message corresponding to the first terminal carried by the second DCI corresponding to the first terminal. For ease of understanding, the following will be described in conjunction with specific embodiments.

[0212] Taking the first terminal as an example, if the private information of the first terminal is the service data of the first terminal and the common information of the first terminal is the system broadcast message, the network-side device (taking the base station as an example) sends the service data of the first terminal and the system broadcast message on the same time-frequency resources. The specific steps are as follows:

[0213] Step 1: The base station sends a first PDCCH (PDCCH1) and a second PDCCH (PDCCH2) corresponding to the first terminal (UE1) on the same time-frequency resource. The first DCI is carried on PDCCH1, and the second DCI is carried on the second PDCCH.

[0214] Step 2: The base station sends a first demodulation reference signal (DMRS1) for demodulating the system broadcast message and a second demodulation reference signal (DMRS2) for demodulating the service data of UE1 to UE1.

[0215] Step 3: UE1 blindly detects PDCCH1 and PDCCH2, obtains the first DCI of the scheduling information of the system broadcast message, and obtains the second DCI of the scheduling information of the service data of UE1, and then demodulates the system message according to the channel estimation result of DMRS1.

[0216] 1) If the first DCI carries a first indication message and / or the second DCI carries a second indication message, and when the first indication message indicates that there is service data on the time-frequency resource of the system broadcast message, and / or, when the second indication message indicates that there is a system broadcast message on the time-frequency resource of the service data, then UE1 removes the system broadcast message from the received signal according to the channel estimation result of DMRS1 and the transmission power of the system broadcast message. Where y represents the received signal, y2 is the received signal corresponding to the service data of UE1, x1 is the demodulated system broadcast message, and P is the transmission power of the system broadcast message (obtained based on PDCCH1). Then, y2 is demodulated according to the channel estimation result of DMRS2 to obtain the user data.

[0217] 2) If the first DCI on PDCCH1 indicates that there is no service data on the resource of the system broadcast message, then UE1 ends signal demodulation.

[0218] It should be noted that when the network-side device does not send public information and private information to the terminal on the same time-frequency resource, the first DCI sent by the network-side device to the terminal may or may not carry the first indication message.

[0219] In the embodiments of the present application, by setting that the first DCI carries a first indication message, and / or, the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal, it is possible to timely indicate to the first terminal whether the received information includes public information and private information on the same time-frequency resource, so that the first terminal can timely adopt corresponding demodulation rules to demodulate the received signal, which is beneficial to improving the reliability of terminal signal demodulation.

[0220] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or, the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0221] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0222] In this embodiment, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI and the second DCI reach the first terminal at the same time. Therefore, it can be set that the first DCI carries the first indication message, and / or, the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal. In this way, the first terminal can timely obtain whether the received information includes the common information and private information of the same time-frequency resource.

[0223] When the first DCI and the second DCI corresponding to the terminal are sent on different PDCCHs, the arrival time of the first DCI and the second DCI at the first terminal may be uncertain. Based on this, by setting that the first DCI carries the first indication message and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal, no matter whether the first terminal receives the first DCI or the second DCI first, it can timely obtain whether the received information includes the common information and private information of the same time-frequency resource. Thus, the first terminal can timely adopt the corresponding scheduling and demodulation rules to schedule and demodulate the received information.

[0224] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the common information;

[0225] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resource of the private information of the first terminal.

[0226] In this embodiment, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the common information. The third indication message may be one or more of the following:

[0227] a. The absolute value of the transmission power or average transmission power of the common information;

[0228] b. The ratio of the transmission power of the common information to the sum of the transmission powers of the private information of each terminal (this item can be used when the terminal can obtain the sum of the transmission powers of the private information of each terminal);

[0229] c. The ratio of the average transmission power of the common information to the sum of the average transmission powers of the private information of each terminal (this item can be used when the terminal can obtain the sum of the average transmission powers of the private information of each terminal);

[0230] d. The ratio of the transmission power of the common information to the total transmission power of the base station (this item can be used when the terminal can obtain the total transmission power of the base station);

[0231] e. The ratio of the average transmission power of the common information to the average transmission power of the base station (this item can be used when the terminal can obtain the average transmission power of the base station);

[0232] f. The ratio of the transmission power of the common information to the transmission power of the first reference signal of the common information (this item can be used when the terminal can obtain the transmission power of the first reference signal);

[0233] g. The ratio of the average transmission power of the common information to the average transmission power of the first demodulation reference signal of the common information (this item can be used when the terminal can obtain the average transmission power of the first demodulation reference signal).

[0234] Among them, the transmission power of the common information can be the actual transmission power of the common information or the average transmission power of the common information. The transmission power of the common information in items a to g above refers to the actual transmission power of the common information.

[0235] The second DCI corresponding to the first terminal further carries a fourth indication message corresponding to the first terminal. The fourth indication message is used to determine the transmission power of the private message of the first terminal. The fourth indication message can be one or more of the following:

[0236] a. The absolute value of the transmission power or average transmission power of the private information;

[0237] b. The ratio of the transmission power of the private information to the sum of the transmission powers of the private information of each terminal (this item can be used when the terminal can obtain the sum of the transmission powers of the private information of each terminal);

[0238] c. The ratio of the average transmission power of the private information to the sum of the average transmission powers of the private information of each terminal (this item can be used when the terminal can obtain the sum of the average transmission powers of the private information of each terminal);

[0239] d. The ratio of the transmission power of the private information to the total transmission power of the base station (this item can be used when the terminal can obtain the total transmission power of the base station);

[0240] e. The ratio of the average transmission power of the private information to the average transmission power of the base station (this item can be used when the terminal can obtain the average transmission power of the base station);

[0241] f. The ratio of the transmission power of the private information to the sum of the transmission powers of the common information (this item can be used when the terminal can obtain the sum of the transmission powers of the common information);

[0242] g. The ratio of the average transmission power of the private information to the sum of the average transmission powers of the common information (this item can be used when the terminal can obtain the sum of the average transmission powers of the common information);

[0243] h. The ratio of the transmission power of the private information to the transmission power of the second demodulation reference signal (this item can be used when the terminal can obtain the transmission power of the second demodulation reference signal);

[0244] i. The ratio of the average transmission power of the private information to the average transmission power of the second reference signal (this item can be used when the terminal can obtain the average transmission power of the second reference signal);

[0245] j. The ratio of the transmission power of the private information to the transmission power of the first demodulation reference signal (this item can be used when the terminal can obtain the transmission power of the first demodulation reference signal);

[0246] k. The ratio of the average transmission power of the private information to the average transmission power of the first demodulation reference signal (this item can be used when the terminal can obtain the average transmission power of the first demodulation reference signal);

[0247] Among them, the transmission power of the private information can be the actual transmission power of the private information or the average transmission power of the private information. The transmission power of the private information in items a to k above refers to the actual transmission power of the private information.

[0248] The second DCI corresponding to the first terminal further carries a fifth indication message corresponding to the first terminal. The fifth indication message corresponding to the first terminal indicates that when there is private information of other terminals in the time-frequency resources of the private information of the first terminal, the first terminal can regard the private information of other terminals as interference and demodulate the private information of the first terminal based on the second DCI corresponding to the first terminal and the second demodulation reference signal.

[0249] According to rate-splitting multiple access, when scheduling and demodulating the common information and private information of the terminal, it is necessary to utilize the transmission power of the common information of the terminal and the transmission power of the private information of the terminal. In the embodiments of the present invention, it is not limited that the first DCI must directly carry the transmission power of the common information, nor is it limited that the second DCI must directly carry the transmission power of the private information. As long as the transmission power of the common information can be determined based on the third indication message carried by the first DCI, and the transmission power of the private information can be determined based on the fourth indication message carried by the second DCI, in this way, the flexibility of configuring the first DCI and the second DCI can be improved.

[0250] Optionally, at least one of the following differences exists between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals:

[0251] The sequence of the reference signal;

[0252] The resources to which the reference signal is mapped, and the resources to which the reference signal is mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0253] The transmission power of the reference signal.

[0254] In this embodiment, as long as at least one of the above differences exists between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals, the terminal can demodulate the corresponding information according to the corresponding reference signal. Through the above settings, it is beneficial to improve the flexibility of reference signal setting.

[0255] It should be noted that a certain ratio (i.e., power scaling factor) needs to be satisfied between the transmission power of the reference signal and the transmission power of the information. Specifically, the transmission power of the first demodulation reference signal needs to conform to the ratio of the transmission power of the common information to the transmission power of the first demodulation reference signal, or the ratio of the average transmission power of the common information to the average transmission power of the first demodulation reference signal in the third indication message in the above embodiment; the transmission power of the second demodulation reference signal needs to conform to the ratio of the transmission power of the private information to the transmission power of the second demodulation reference signal, or the ratio of the average transmission power of the private information to the average transmission power of the second demodulation reference signal in the fourth indication message.

[0256] For ease of understanding, the following provides several specific embodiments of the first demodulation reference signal and the second demodulation reference signal.

[0257] Embodiment 1: The sequences of the first demodulation reference signal and each second demodulation reference signal are different and are mapped to the same resource for transmission. Scrambling IDs with different configurations can be generated for the sequences of the first demodulation reference signal and each second demodulation reference signal to obtain different initial values, and then different sequences are generated. The transmission powers of the first demodulation reference signal and each second demodulation reference signal can be different.

[0258] Embodiment 2: The sequences of the first demodulation reference signal and each second demodulation reference signal are different or the same and are mapped to different resources for transmission, where the resources include at least one of time domain resources, frequency domain resources, and code domain resources. Among them, the transmission powers of the first demodulation reference signal and each second demodulation reference signal can be different or the same.

[0259] Embodiment 3: The first demodulation reference signal and each second demodulation reference signal are the same reference signal, but the transmission powers of the first demodulation reference signal and each second demodulation reference signal are different.

[0260] See Figure 2 , Figure 2 is the second flowchart of an information transmission method provided by an embodiment of the present invention, which is applied to a terminal. The terminal is a first terminal. As Figure 2 shown, the method includes the following steps:

[0261] Step 201: On the same time-frequency resource, receive the public information sent by the network-side device according to the transmission power of the public information of N terminals, and receive the private information of N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal. The first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0262] Among them, the transmission powers of the public information and the private information are the transmission powers respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the public information rate and private information rate of the N terminals.

[0263] Optionally, the private information of the N terminals is the service data of the N terminals;

[0264] The public information includes any one of the following:

[0265] Broadcast service data;

[0266] Multicast service data;

[0267] System broadcast message;

[0268] Paging message.

[0269] Optionally, after receiving the common information sent by the receiving network side device according to the transmission power of the common information of N terminals, and receiving the private information of N terminals sent by the network side device according to the transmission power corresponding to the private information of the first terminal, the method further includes:

[0270] Receiving a first downlink control information DCI, a first demodulation reference signal, a second DCI corresponding to the first terminal, and a second demodulation reference signal corresponding to the first terminal;

[0271] Scheduling the common information according to the first DCI, demodulating the common information according to the first demodulation reference signal, scheduling the private information of the first terminal according to the second DCI corresponding to the first terminal, and demodulating the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

[0272] Optionally, before scheduling the private information of the first terminal according to the second DCI corresponding to the first terminal, the method further includes:

[0273] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. When the first indication message and / or the second indication message indicate that there is the common information and the private information on the same time-frequency resource, after demodulating the common information, removing the demodulated common information according to the first DCI;

[0274] Wherein, the first indication message is used to indicate whether there is the private information on the time-frequency resource of the common information, and the second indication message is used to indicate whether there is the common information on the time-frequency resource of the private information.

[0275] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal;

[0276] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal.

[0277] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the common information;

[0278] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal, where the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0279] It should be noted that, as an implementation manner of the terminal corresponding to the embodiment shown in Figure 1 , the specific implementation manner can refer to the relevant description of the embodiment shown in Figure 1 . To avoid repeated description, this embodiment will not be elaborated herein, and the same beneficial effects can also be achieved.

[0280] Refer to Figure 3 , Figure 3 is one of the schematic structural diagrams of a network-side device provided by an embodiment of the present invention. As shown in Figure 3 , the network-side device 300 includes:

[0281] An input module 301, configured to input preset demand parameters into a pre-constructed optimization model, where the preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise index, and constraint condition parameters, and N is an integer greater than or equal to 1;

[0282] An acquisition module 302, configured to acquire the transmission power of the public information of the N terminals output by the optimization model with the goal of maximizing the system performance index, and the transmission power corresponding to the private information of the N terminals output by the optimization model, where the system performance index is determined based on the public information rate and private information rate of the N terminals;

[0283] A first transmission module 303, configured to transmit the public information to the N terminals respectively according to the transmission power of the public information on the same time-frequency resources, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0284] Optionally, the private information of the N terminals is the service data of the N terminals;

[0285] The public information includes any one of the following:

[0286] Broadcast service data;

[0287] Multicast service data;

[0288] System broadcast message;

[0289] Paging message.

[0290] Optionally, the network-side device further includes:

[0291] A second sending module, configured to send a first DCI and a first demodulation reference signal to the N terminals respectively, and send a corresponding second DCI and a second demodulation reference signal to the N terminals;

[0292] The first DCI is used to schedule the public information, and the first demodulation reference signal is used to demodulate the public information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal. The first terminal is any one of the N terminals.

[0293] Optionally,

[0294] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resources of the public information, and the second indication message is used to indicate whether there is public information on the time-frequency resources of the private information.

[0295] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal;

[0296] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal.

[0297] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the public information;

[0298] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0299] Optionally, at least one of the following differences exists between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals:

[0300] Sequence of reference signals;

[0301] Resources to which reference signals are mapped, where the resources to which the reference signals are mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0302] Transmission power of reference signals.

[0303] The network-side device 300 can implement Figure 1 Each process implemented by the network-side device in the method embodiments shown and can achieve the same beneficial effects. To avoid repetition, it will not be elaborated here.

[0304] See Figure 4 , Figure 4 is one of the schematic structural diagrams of a terminal provided by an embodiment of the present invention. As Figure 4 shown, the terminal is a first terminal, and the first terminal 400 includes:

[0305] A first receiving module 401, configured to receive the common information sent by the network-side device according to the transmission power of the common information of N terminals on the same time-frequency resource, and receive the private information of the N terminals sent by the network-side device according to the transmission power corresponding to the private information of the first terminal. The first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0306] Wherein, the transmission powers of the common information and the private information are respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the common information rate and the private information rate of the N terminals.

[0307] Optionally, the private information of the N terminals is the service data of the N terminals;

[0308] The common information includes any one of the following:

[0309] Broadcast service data;

[0310] Multicast service data;

[0311] System broadcast message;

[0312] Paging message.

[0313] Optionally, the first terminal 400 further includes:

[0314] A second receiving module, configured to receive a first DCI and a first demodulation reference signal, and a second DCI and a second demodulation reference signal corresponding to the first terminal;

[0315] A first scheduling module: configured to schedule the common information according to the first DCI

[0316] A first demodulation module, configured to demodulate the public information according to the first demodulation reference signal

[0317] A second scheduling module, configured to schedule the private information of the first terminal according to a second DCI corresponding to the first terminal

[0318] A second demodulation module, configured to demodulate the private information of the first terminal according to a second demodulation reference signal corresponding to the first terminal

[0319] Optionally, the first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. Specifically, the demodulation module is configured to:

[0320] When the first indication message and / or the second indication message indicates that the public information and the private information exist on the same time-frequency resource, after demodulating the public information, remove the demodulated public information according to the first DCI

[0321] Wherein, the first indication message is used to indicate whether the private information exists on the time-frequency resource of the public information, and the second indication message is used to indicate whether the public information exists on the time-frequency resource of the private information

[0322] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal

[0323] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal

[0324] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the public information

[0325] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Wherein, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resource of the private information of the first terminal

[0326] The terminal 400 can implement Figure 1 each process implemented by the terminal in the method embodiments shown in the figure, and can achieve the same beneficial effects. To avoid repetition, details are not described herein.

[0327] An embodiment of the present invention further provides a network-side device, including: a processor, a memory, and a program stored on the memory and executable on the processor. When the program is executed by the processor, it implements each process of the information sending method embodiment applied to the network-side device, and can achieve the same technical effects. To avoid repetition, details are not described herein.

[0328] Specifically, referring to Figure 5 as shown in the figure, an embodiment of the present invention further provides a network-side device, including a bus 501, a transceiver 502, an antenna 503, a bus interface 504, a processor 505, and a memory 506.

[0329] The processor is configured to input preset demand parameters into a pre-constructed optimization model. The preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise index, and constraint condition parameters, where N is an integer greater than or equal to 1.

[0330] The processor is further configured to obtain the transmission power of the common information of the N terminals and the transmission power corresponding to the private information of the N terminals output by the optimization model with the goal of maximizing the system performance index. The system performance index is determined based on the common information rate and the private information rate of the N terminals.

[0331] The transceiver is configured to transmit the common information to the N terminals respectively according to the transmission power of the common information on the same time-frequency resource, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

[0332] Optionally, the private information of the N terminals is service data of the N terminals.

[0333] The common information includes any one of the following:

[0334] Broadcast service data;

[0335] Multicast service data;

[0336] System broadcast message;

[0337] Paging message.

[0338] Optionally, the transceiver is further configured to:

[0339] Send the first DCI, the first demodulation reference signal, the corresponding second DCI, and the corresponding second demodulation reference signal to the N terminals respectively;

[0340] The first DCI is used to schedule the public information, and the first demodulation reference signal is used to demodulate the public information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal. The first terminal is any one of the N terminals.

[0341] Optionally,

[0342] The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resources of the public information, and the second indication message is used to indicate whether there is public information on the time-frequency resources of the private information.

[0343] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0344] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0345] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the public information;

[0346] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0347] Optionally, there is at least one of the following differences between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals:

[0348] The sequence of the reference signal;

[0349] Resources for reference signal mapping, where the resources for reference signal mapping include at least one of mapped time-domain resources, frequency-domain resources, and code-domain resources;

[0350] Transmission power of the reference signal.

[0351] In Figure 5 In the [figure], the bus architecture (represented by bus 501) may include any number of interconnected buses and bridges. Bus 501 links together various circuits including one or more processors represented by processor 505 and a memory represented by memory 506. Bus 501 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be further described herein. Bus interface 504 provides an interface between bus 501 and transceiver 502. Transceiver 502 may be an element or multiple elements, such as multiple receivers and transmitters, providing units for communicating with various other devices over a transmission medium. Data processed by processor 505 is transmitted over a wireless medium via antenna 503. Further, antenna 503 also receives data and transmits the data to processor 505.

[0352] Processor 505 is responsible for managing bus 501 and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. Memory 506 may be used to store data used by processor 505 when performing operations.

[0353] Optionally, processor 505 may be a CPU, ASIC, FPGA, or CPLD.

[0354] An embodiment of the present invention further provides a terminal, which is a first terminal and includes: a processor, a memory, and a program stored on the memory and executable on the processor. When the program is executed by the processor, it implements each process of the above-described embodiment of the information sending method applied to the first terminal and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0355] Specifically, as shown in Figure 6 An embodiment of the present invention further provides a terminal, including a bus 601, a transceiver 602, an antenna 603, a bus interface 604, a processor 605, and a memory 606.

[0356] The transceiver is used to receive the public information sent by the network-side device at the transmission power of the public information of N terminals on the same time-frequency resource, and receive the private information of N terminals sent by the network-side device at the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1;

[0357] Wherein, the transmission powers of the public information and the private information are respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the public information rate and private information rate of the N terminals.

[0358] Optionally, the private information of the N terminals is the service data of the N terminals;

[0359] The public information includes any one of the following:

[0360] Broadcast service data;

[0361] Multicast service data;

[0362] System broadcast message;

[0363] Paging message.

[0364] Optionally, the transceiver is further used to receive a first DCI, a first demodulation reference signal, and a second DCI and a second demodulation reference signal corresponding to the first terminal;

[0365] The processor is used to:

[0366] Schedule the public information according to the first DCI, and demodulate the public information according to the first demodulation reference signal;

[0367] Schedule the private information of the first terminal according to the second DCI corresponding to the first terminal, and demodulate the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

[0368] Optionally, the first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. In the first indication message and / or the second indication message, the processor is specifically used to:

[0369] In the case where the first indication message and / or the second indication message indicates that there is the public information and the private information on the same time-frequency resource, after demodulating the public information, remove the demodulated public information according to the first DCI;

[0370] Wherein, the first indication message is used to indicate whether the private information exists on the time-frequency resources of the public information, and the second indication message is used to indicate whether the public information exists on the time-frequency resources of the private information.

[0371] Optionally, when the first DCI and the second DCI corresponding to the first terminal are sent on the same PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal;

[0372] When the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

[0373] Optionally, the first DCI further carries a third indication message, and the third indication message is used to determine the transmission power of the public information;

[0374] The second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal. Among them, the fourth indication message corresponding to the first terminal is used to determine the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

[0375] In Figure 6 the bus architecture (represented by bus 601), bus 601 may include any number of interconnected buses and bridges. Bus 601 links together various circuits including one or more processors represented by processor 605 and a memory represented by memory 606. Bus 601 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be further described herein. Bus interface 604 provides an interface between bus 601 and transceiver 602. Transceiver 602 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. The data processed by processor 605 is transmitted over the wireless medium via antenna 603. Further, antenna 603 also receives data and transmits the data to processor 605.

[0376] The processor 605 is responsible for managing the bus 601 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 606 can be used to store the data used by the processor 605 when performing operations.

[0377] Optionally, the processor 605 can be a CPU, ASIC, FPGA, or CPLD.

[0378] An embodiment of the present invention also provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, it implements each process of the above-described information sending method embodiment and can achieve the same technical effect. To avoid repetition, it will not be elaborated here. Among them, the computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc, etc.

[0379] It should be noted that in this article, the term "including", "comprising", or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article, or device. Without more limitations, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article, or device including that element.

[0380] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment method can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in various embodiments of the present invention.

[0381] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the present invention and the claims, and all of them belong to the protection scope of the present invention.

Claims

1. An information sending method, characterized in that, applied to a network side device, the method includes: Inputting preset demand parameters into a pre-constructed optimization model, where the preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise exponent, and constraint condition parameters, and N is an integer greater than or equal to 1; Obtaining the transmission power of the common information of the N terminals output by the optimization model with the goal of maximizing the system performance index, and the transmission power corresponding to the private information of the N terminals, where the system performance index is determined based on the common information rate and private information rate of the N terminals; On the same time-frequency resource, sending the common information to the N terminals respectively according to the transmission power of the common information, and sending the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

2. The method according to claim 1, characterized in that, The private information of the N terminals is the service data of the N terminals; The common information includes any one of the following: Broadcast service data; Multicast service data; System broadcast message; Paging message.

3. The method according to claim 1, characterized in that, After sending the common information to the N terminals respectively according to the transmission power of the common information, and sending the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals, the method further includes: Sending first downlink control information DCI and first demodulation reference signals to the N terminals respectively, and sending corresponding second DCI and second demodulation reference signals to the N terminals; The first DCI is used to schedule the common information, and the first demodulation reference signal is used to demodulate the common information. Among them, the second DCI corresponding to the first terminal is used to schedule the private information of the first terminal, and the second demodulation reference signal corresponding to the first terminal is used to demodulate the private information of the first terminal, and the first terminal is any one of the N terminals.

4. The method according to claim 3, characterized in that, The first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. The first indication message is used to indicate whether there is private information on the time-frequency resource of the common information, and the second indication message is used to indicate whether there is common information on the time-frequency resource of the private information.

5. The method according to claim 4, characterized in that, When the first DCI and the second DCI corresponding to the first terminal are sent on the same physical downlink control channel PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal; In the case where the first DCI and the second DCI corresponding to the first terminal are transmitted on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

6. The method according to claim 4, wherein, the first DCI further carries a third indication message for indicating the transmission power of the public information; the second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal, wherein the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resources of the private information of the first terminal.

7. The method according to claim 3, wherein, at least one of the following differences exists between the first demodulation reference signal and the second demodulation reference signals corresponding to the N terminals: the sequence of the reference signal; the resources to which the reference signal is mapped, and the resources to which the reference signal is mapped include at least one of the mapped time-domain resources, frequency-domain resources, and code-domain resources; the transmission power of the reference signal.

8. An information transmission method, wherein, applied to a terminal, the terminal is a first terminal, and the method includes: receiving, on the same time-frequency resources, the public information transmitted by the network-side device according to the transmission power of the public information of the N terminals, and receiving the private information of the N terminals transmitted by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1; wherein, the transmission powers of the public information and the private information are respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the public information rate and private information rate of the N terminals.

9. The method according to claim 8, wherein, the private information of the N terminals is the service data of the N terminals; the public information includes any one of the following: broadcast service data; multicast service data; system broadcast message; paging message.

10. The method according to claim 8, wherein, after receiving the public information transmitted by the network-side device according to the transmission power of the public information of the N terminals, and receiving the private information of the N terminals transmitted by the network-side device according to the transmission power corresponding to the private information of the first terminal, the method further includes: receiving a first downlink control information DCI and a first demodulation reference signal sent by the network-side device, and receiving a second DCI and a second demodulation reference signal corresponding to the first terminal; scheduling the public information according to the first DCI, and demodulating the public information according to the first demodulation reference signal; Schedule the private information of the first terminal according to the second DCI corresponding to the first terminal, and demodulate the private information of the first terminal according to the second demodulation reference signal corresponding to the first terminal.

11. The method according to claim 10, wherein, before scheduling the private information of the first terminal according to the second DCI corresponding to the first terminal, the method further includes: the first DCI carries a first indication message, and / or the second DCI corresponding to the first terminal carries a second indication message corresponding to the first terminal. When the first indication message and / or the second indication message indicate that there is the public information and the private information on the same time-frequency resource, after demodulating the public information, remove the demodulated public information according to the first DCI; wherein, the first indication message is used to indicate whether there is the private information on the time-frequency resource of the public information, and the second indication message is used to indicate whether there is the public information on the time-frequency resource of the private information.

12. The method according to claim 11, wherein, when the first DCI and the second DCI corresponding to the first terminal are sent on the same physical downlink control channel PDCCH, the first DCI carries the first indication message, and / or the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal; when the first DCI and the second DCI corresponding to the first terminal are sent on different PDCCHs, the first DCI carries the first indication message, and the second DCI corresponding to the first terminal carries the second indication message corresponding to the first terminal.

13. The method according to claim 11, wherein, the first DCI further carries a third indication message, and the third indication message is used to indicate the transmission power of the public information; the second DCI corresponding to the first terminal further carries a fourth indication message and a fifth indication message corresponding to the first terminal, wherein the fourth indication message corresponding to the first terminal is used to indicate the transmission power of the private information of the first terminal, and the fifth indication message corresponding to the first terminal is used to indicate whether there is private information of other terminals on the time-frequency resource of the private information of the first terminal.

14. A network-side device, wherein, it includes: an input module, configured to input preset demand parameters into a pre-constructed optimization model, where the preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise exponent, and constraint condition parameters, and N is an integer greater than or equal to 1; an acquisition module, configured to acquire the transmission power of the public information of the N terminals output by the optimization model with the goal of maximizing the system performance index, and the transmission power corresponding to the private information of the N terminals, where the system performance index is determined based on the public information rate and the private information rate of the N terminals. A first transmission module, configured to transmit the common information to the N terminals respectively according to the transmission power of the common information on the same time-frequency resource, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals.

15. A terminal, characterized in that the terminal is a first terminal, and the first terminal includes: A first reception module, configured to receive the common information transmitted by the network-side device according to the transmission power of the common information of N terminals on the same time-frequency resource, and receive the private information of the N terminals transmitted by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1; wherein, the transmission powers of the common information and the private information are the transmission powers respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the common information rate and the private information rate of the N terminals.

16. A network-side device, characterized in that it includes a transceiver and a processor, the processor is configured to input preset demand parameters into a pre-constructed optimization model, where the preset demand parameters include channel coefficients between N terminals in a cell and a base station, a noise exponent, and constraint condition parameters, and N is an integer greater than or equal to 1 the processor is further configured to obtain the transmission power of the common information of the N terminals output by the optimization model with the goal of maximizing the system performance index, and the transmission power corresponding to the private information of the N terminals, where the system performance index is determined based on the common information rate and the private information rate of the N terminals; the transceiver is configured to transmit the common information to the N terminals respectively according to the transmission power of the common information, and transmit the private information of the N terminals to the N terminals respectively according to the transmission power corresponding to the private information of the N terminals on the same time-frequency resource.

17. A terminal, characterized in that the terminal is a first terminal, and the first terminal includes a transceiver and a processor, the transceiver is configured to receive the common information transmitted by the network-side device according to the transmission power of the common information of N terminals on the same time-frequency resource, and receive the private information of the N terminals transmitted by the network-side device according to the transmission power corresponding to the private information of the first terminal, where the first terminal is any one of the N terminals, and N is an integer greater than or equal to 1; wherein, the transmission powers of the common information and the private information are the transmission powers respectively output by a pre-constructed optimization model with the goal of maximizing the system performance index, and the system performance index is determined based on the common information rate and the private information rate of the N terminals.

18. A network-side device, characterized in that it includes: a processor, a memory, and a program stored on the memory and executable on the processor, where when the program is executed by the processor, the steps of the information transmission method according to any one of claims 1 to 7 are implemented.

19. A terminal, characterized in that, comprising: a processor, a memory, and a program stored on the memory and executable on the processor, and when the program is executed by the processor, the steps of the information sending method according to any one of claims 8 to 13 are implemented.

20. A computer-readable storage medium, characterized in that, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the information sending method according to any one of claims 1 to 7 are implemented; or when the computer program is executed by the processor, the steps of the information sending method according to any one of claims 8 to 13 are implemented.

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