CN116132243A - Communication method, communication device, and computer-readable storage medium - Google Patents

Abstract

The application discloses a communication method, a communication device and a computer readable storage medium, wherein an initial signal is acquired firstly, and then signal processing is carried out on the initial signal to obtain a scrambling signal; dividing the scrambling signal into a preset number of groups of sub scrambling signals; modulating each group of sub-scrambling signals according to preset modulation and coding strategy information to obtain corresponding sub-modulation signals; at least two groups of sub-scrambling signals are modulated by adopting different modulation modes; obtaining a combined modulation signal according to a preset number of groups of sub-modulation signals; a transmission signal for communication with the second communication terminal is generated from the combined modulated signal. The method can divide the signals into a plurality of groups to be modulated respectively at a physical layer, expands the traditional single modulation mode into a plurality of modulation modes to be aliased, increases the recognition difficulty after the data is intercepted, ensures the communication safety, does not need to encrypt the data at an application layer, and has smaller influence on the data transmission load.

Description

Communication method, communication device and computer readable storage medium

Technical Field

The present application relates to the field of communication technology, and in particular to a communication method, a communication device and a computer-readable storage medium.

Background Art

With the development of wireless communication, the security of wireless communication has received more and more attention. Since the wireless communication protocol is unified and open worldwide, non-cooperative parties can obtain the data of legitimate users by eavesdropping or intercepting, and after the non-cooperative parties analyze the user data, they may forge the data, so that the cooperative parties cannot obtain the correct information.

In the related art, data is generally encrypted at the application layer to prevent information from being intercepted. However, the method of encrypting data at the application layer is often accompanied by high complexity, which will greatly increase the load of data transmission.

Summary of the invention

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a communication method, a communication device and a computer-readable storage medium, which can increase the difficulty of identifying data after being intercepted and have little impact on the load of data transmission.

According to a communication method according to an embodiment of the first aspect of the present application, applied to a first communication terminal, the method includes:

Acquire an initial signal, and perform signal processing on the initial signal to obtain a scrambled signal;

Dividing the scrambled signal into a preset number of groups of sub-scrambled signals;

According to preset modulation and coding strategy information, each group of the sub-scrambled signals is modulated to obtain corresponding sub-modulated signals; wherein the modulation and coding strategy information is used to determine the modulation mode of each group of the sub-scrambled signals; at least two groups of the sub-scrambled signals are modulated using different modulation modes;

Obtaining a combined modulated signal according to a preset number of groups of sub-modulated signals;

A transmission signal for communicating with the second communication end is generated according to the combined modulated signal.

According to the communication method of the embodiment of the present application, at least the following beneficial effects are achieved: the communication method of the embodiment of the first aspect of the present application is applied to the first communication terminal, the first communication terminal obtains the initial signal, and then processes the initial signal to obtain the scrambled signal; the scrambled signal is divided into a preset number of groups of sub-scrambled signals; each group of sub-scrambled signals is modulated according to the preset modulation and coding strategy information to obtain the corresponding sub-modulation signal; wherein the modulation and coding strategy information is used to determine the modulation mode of each group of sub-scrambled signals; at least two groups of sub-scrambled signals are modulated using different modulation modes; a combined modulation signal is obtained according to the preset number of groups of sub-modulation signals; a transmission signal for communication with the second communication terminal is generated according to the combined modulation signal. The communication method of the embodiment of the first aspect of the present application can divide the signal into multiple groups at the physical layer for modulation respectively. Since at least two groups of sub-scrambled signals are modulated using different modulation modes, the traditional single modulation mode is expanded to multiple modulation modes, which increases the difficulty of identifying the data after being intercepted, so as to ensure the communication security, and there is no need to encrypt the data at the application layer, which has little impact on the data transmission load.

According to some embodiments of the first aspect of the present application, the step of modulating each group of sub-scrambled signals according to preset modulation and coding strategy information to obtain corresponding sub-modulated signals includes:

Determining, according to the value of the modulation and coding strategy information, a target modulation mode corresponding to each group of the sub-scrambled signals from a preset modulation mapping table;

The corresponding sub-scrambled signal is modulated according to the target modulation mode to obtain a corresponding sub-modulated signal.

According to some embodiments of the first aspect of the present application, before obtaining the combined modulated signal, the method includes:

Get the angle information to be adjusted;

According to the angle information, constellation rotation is performed on each group of sub-modulation signals to update the corresponding sub-modulation signals.

According to some embodiments of the first aspect of the present application, the transmission signal includes downlink control information; wherein the downlink control information includes the modulation and coding strategy information and the angle information.

In a second aspect, an embodiment of the present application provides a communication method, which is applied to a second communication terminal, and the method includes:

Receiving a transmission signal sent by the first communication terminal, and parsing the transmission signal to obtain a combined modulated signal;

Dividing the combined modulated signal into a preset number of groups of sub-modulated signals;

According to the modulation and coding strategy information corresponding to the combined modulation signal, each sub-modulation signal is parsed to obtain a corresponding sub-scrambled signal;

An initial signal is obtained according to each of the sub-scrambled signals.

According to some embodiments of the second aspect of the present application, parsing each sub-modulation signal to obtain a corresponding sub-scrambled signal according to the modulation and coding strategy information corresponding to the combined modulation signal includes:

Determining, according to the value of the modulation and coding strategy information, a target modulation mode corresponding to each group of the sub-scrambled signals from a preset modulation mapping table;

The corresponding sub-modulation signal is demodulated according to the target modulation mode to obtain a corresponding sub-scrambled signal.

According to some embodiments of the second aspect of the present application, before parsing each sub-modulation signal to obtain a corresponding sub-scrambled signal according to the modulation and coding strategy information corresponding to the combined modulation signal, the method further includes:

According to the angle information, a reverse constellation rotation is performed on each group of sub-modulation signals to update the corresponding sub-modulation signals.

According to some embodiments of the second aspect of the present application, the transmission signal further includes downlink control information, wherein the downlink control information includes the modulation and coding strategy information and the angle information;

The method further comprises:

The downlink control information is obtained by parsing the transmission signal, and the modulation and coding strategy information and the angle information are obtained from the downlink control information.

In a third aspect, an embodiment of the present application provides a communication device, comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the communication method described in any one of the embodiments of the first aspect or the second aspect when executing the computer program.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the storage medium stores a program, and wherein when the program is executed by a processor, the communication method described in any one of the embodiments of the first aspect or the second aspect is implemented.

Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

FIG1 is a flow chart of a communication method according to some embodiments of the present application;

FIG2 is a schematic diagram of a sub-process of a communication method according to some embodiments of the present application;

FIG. 3 is a schematic diagram of a sub-process of a communication method in some embodiments of the present application

FIG4 is a schematic diagram of a constellation of a modulation signal according to some embodiments of the present application;

FIG5 is a schematic diagram of constellations of modulation signals according to other embodiments of the present application;

FIG6 is a flow chart of a communication method according to some other embodiments of the present application;

FIG7 is a schematic diagram of a sub-process of a communication method according to some embodiments of the present application;

FIG8 is a schematic diagram of a sub-process of a communication method according to some embodiments of the present application;

FIG9 is a schematic diagram of a sub-process of a communication method according to some embodiments of the present application;

FIG10 is a schematic diagram of a communication device provided in some embodiments of the present application.

DETAILED DESCRIPTION

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

It is understandable that since wireless communication protocols are open and unified worldwide, non-cooperative parties can obtain legitimate user data through eavesdropping or interception, and after parsing the user data, they may falsify the data, so that the cooperative party cannot obtain the correct information. In the related technology, data is generally encrypted at the application layer to prevent information from being intercepted. However, the method of encrypting data at the application layer is often accompanied by high complexity, which will greatly increase the load of data transmission, thereby reducing the efficiency of data transmission.

Based on this, the present application proposes a communication method, a communication device and a computer-readable storage medium, which can increase the difficulty of identifying data after being intercepted, and have little impact on the load of data transmission and little impact on data transmission efficiency.

The communication method provided in the embodiment of the present application relates to the field of communication technology. The communication method provided in the embodiment of the present application can be applied to a terminal, can also be applied to a server side, and can also be software running in a terminal or a server side. In some embodiments, the terminal can be any terminal with data processing function and page display function, such as a mobile device (for example, a mobile phone, a portable music player, a personal digital assistant, a dedicated messaging device, a portable gaming device), a desktop computer, an intelligent robot, an intelligent voice interaction device, a smart home appliance, and a vehicle-mounted terminal; the server side can be configured as an independent physical server, or it can be configured as a server cluster or a distributed system composed of multiple physical servers, and can also be configured to provide cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and cloud servers for basic cloud computing services such as big data and artificial intelligence platforms; the software can be an application that implements the communication method, etc., but is not limited to the above forms.

The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

In the first aspect, referring to Figure 1, Figure 1 is a flow chart of a communication method according to an embodiment of the present application. The communication method according to the first aspect of the embodiment is applied to a first communication terminal, and the method may include but is not limited to steps S110, S120, S130, S140, and S150.

Step S110, obtaining an initial signal, performing signal processing on the initial signal, and obtaining a scrambled signal;

其中，A为初始信号的长度，即初始信号的符号总数，N为加扰信号的长度，即加扰信号的符号总数。For example, the initial signal is represented by: a ₀ , a ₁ , ..., a _A-1 ; after the initial signal is processed, a scrambled signal is obtained, and the scrambled signal is represented by:

Wherein, A is the length of the initial signal, that is, the total number of symbols of the initial signal, and N is the length of the scrambled signal, that is, the total number of symbols of the scrambled signal.

Step S120, dividing the scrambled signal into a preset number of groups of sub-scrambled signals;

For example, the preset number is set to 3, and the scrambled signal is divided into 3 groups of sub-scrambled signals, and the length of each group of sub-scrambled signals is N ₁ , N ₂ , and N ₃ , respectively. Then N ₁ +N ₂ +N ₃ =N,

Step S130, modulating each group of sub-scrambled signals according to preset modulation and coding strategy information to obtain corresponding sub-modulated signals; wherein the modulation and coding strategy information is used to determine the modulation mode of each group of sub-scrambled signals; at least two groups of sub-scrambled signals are modulated using different modulation modes;

Step S140, obtaining a combined modulation signal according to a preset number of groups of sub-modulation signals;

Step S150: generating a transmission signal for communicating with the second communication end according to the combined modulation signal.

The communication method of the first aspect embodiment of the present application is applied to the first communication terminal, the first communication terminal obtains the initial signal, and then processes the initial signal to obtain a scrambled signal; the scrambled signal is divided into a preset number of groups of sub-scrambled signals; each group of sub-scrambled signals is modulated according to the preset modulation and coding strategy information to obtain a corresponding sub-modulation signal; wherein the modulation and coding strategy information is used to determine the modulation mode of each group of sub-scrambled signals; at least two groups of sub-scrambled signals are modulated using different modulation modes; a combined modulation signal is obtained according to the preset number of groups of sub-modulation signals; a transmission signal for communication with the second communication terminal is generated according to the combined modulation signal. The communication method of the first aspect embodiment of the present application can divide the signal into multiple groups at the physical layer for modulation respectively. Since at least two groups of sub-scrambled signals are modulated using different modulation modes, the traditional single modulation mode is expanded to multiple modulation modes, which increases the difficulty of identifying the data after being intercepted, so as to ensure the security of communication. There is no need to encrypt the data at the application layer, and the impact on the data transmission load is small, thereby having a small impact on the communication efficiency, and the communication efficiency can be guaranteed.

It should be noted that when generating a transmission signal for communicating with the second communication end, the first communication end maps all channels and all signals to the same time-frequency resource map to obtain frequency domain data to be sent, and then uses OFDM (Orthogonal Frequency Division Multiplexing) technology to convert the frequency domain data to be sent into time domain data to be sent, and the time domain data to be sent is used as the transmission signal, and then the first communication end sends the transmission signal to the second communication end.

It is worth noting that the present application sends service information through the PDSCH channel. In the PDSCH channel, the supported modulation modes include QPSK, 16QAM, 64QAM, and 256QAM, and the preset modulation mode set includes 4 modulation modes, namely QPSK, 16QAM, 64QAM, and 256QAM. Therefore, in step S130, each group of sub-scrambled signals is adjusted using a modulation mode in the preset modulation mode set. The modulation modes of different groups of sub-scrambled signals may be the same or different, but the modulation modes of at least two groups of sub-scrambled signals are different, thus realizing the expansion from the traditional single modulation mode to multiple modulation mode aliasing, increasing the difficulty of identifying the data after being intercepted, so as to ensure communication security.

In some embodiments, the scrambled signal is divided into a preset number of groups of sub-scrambled signals, assuming that the preset number is N, and the preset modulation mode set includes X modulation modes, then each group of sub-scrambled signals has X modulation modes, then for the scrambled signal, there are X ^N modulation schemes, for example, when the preset number is 3, and the preset modulation mode set includes 4 modulation modes, each group of sub-scrambled signals has 4 modulation modes, and for the scrambled signal, there are 64 modulation schemes. It should be noted that in some embodiments, since there are some schemes in which the modulation modes of all sub-scrambled signals are the same among the 64 schemes, in order to ensure that the modulation modes of at least two groups of sub-scrambled signals are different, it is necessary to eliminate these some schemes from the 64 schemes.

Referring to Fig. 2, Fig. 2 is a sub-flow chart of a communication method provided in some embodiments of the present application. Step S130 may include but is not limited to step S210 and step S220.

Step S210, determining a target modulation mode corresponding to each group of sub-scrambled signals from a preset modulation mapping table according to the value of the modulation and coding strategy information;

Step S220: modulate the corresponding sub-scrambled signal according to the target modulation mode to obtain a corresponding sub-modulated signal.

It is worth noting that the first communication end is provided with a preset modulation mapping table, which records the mapping relationship between the value of the modulation and coding strategy information (Modulation and Coding Scheme, MCS) and the modulation mode of the scrambled signal, and the modulation mode of the scrambled signal includes the modulation mode of each group of sub-scrambled signals.

For example, when the preset number is 3, the preset modulation mode set includes 4 modulation modes, namely QPSK, 16QAM, 64QAM, and 256QAM, then there are 4 modulation modes for each group of sub-scrambled signals, and for the scrambled signal, there are 64 modulation schemes. Therefore, the preset modulation mapping table includes 64 modulation schemes, and each modulation scheme includes 3 modulation modes.

Table 1

Modulation scheme M _symb BPSK N QPSK N/2 16QAM N/4 64QAM N/6 256QAM N/8

It can be understood that in the related art, the scrambled signal is represented by: d ₀ , d ₁ , ..., d _N-1 , then the modulated signal obtained by directly modulating the scrambled signal is:

Here, referring to Table 1, Msymb depends on the modulation mode, and N is the data length of the scrambled signal.

In the present application, refer to Table 2, which is a preset modulation mapping table of an embodiment of the present application. The value range of MSC is 0 to 63. The first communication terminal determines the modulation scheme of the scrambled signal according to the value of MSC, and then determines the target modulation mode of each group of sub-scrambled signals, and then modulates the corresponding sub-scrambled signal according to the target modulation mode to obtain the corresponding sub-modulated signal. For example, when the value of MSC is 1, the modulation scheme of the scrambled signal is determined from the preset modulation mapping table to include QPSK, QPSK, and 16QAM. The length of the scrambled signal is N, and the lengths of the three groups of sub-scrambled signals are N1, N2, and N3, respectively. The target modulation modes of the three groups of sub-scrambled signals are QPSK, QPSK, and 16QAM, respectively. The first communication end modulates the sub-scrambled signal of length N1 using QPSK modulation, modulates the sub-scrambled signal of length N2 using QPSK modulation, and modulates the sub-scrambled signal of length N3 using 16QAM modulation. After modulation, the sub-scrambled signal is changed from 0 and 1 bits to complex numbers of I and Q, and the obtained three groups of sub-modulated signals are respectively expressed as follows:

Table 2

MCS Modulation MCS Modulation 0 QPSK, QPSK, QPSK 32 64QAM, QPSK, QPSK 1 QPSK, QPSK, 16QAM 33 64QAM, QPSK, 16QAM 2 QPSK, QPSK, 64QAM 34 64QAM, QPSK, 64QAM 3 QPSK, QPSK, 256QAM 35 64QAM, QPSK, 256QAM 4 QPSK, 16QAM, QPSK 36 64QAM, 16QAM, QPSK 5 QPSK, 16QAM, 16QAM 37 64QAM, 16QAM, 16QAM 6 QPSK, 16QAM, 64QAM 38 64QAM, 16QAM, 64QAM 7 QPSK, 16QAM, 256QAM 39 64QAM, 16QAM, 256QAM 8 QPSK, 64QAM, QPSK 40 64QAM, 64QAM, QPSK 9 QPSK, 64QAM, 16QAM 41 64QAM, 64QAM, 16QAM 10 QPSK, 64QAM, 64QAM 42 64QAM, 64QAM, 64QAM 11 QPSK, 64QAM, 256QAM 43 64QAM, 64QAM, 256QAM 12 QPSK, 256QAM, QPSK 44 64QAM, 256QAM, QPSK 13 QPSK, 256QAM, 16QAM 45 64QAM, 256QAM, 16QAM 14 QPSK, 256QAM, 64QAM 46 64QAM, 256QAM, 64QAM 15 QPSK, 256QAM, 256QAM 47 64QAM, 256QAM, 256QAM 16 16QAM, QPSK, QPSK 48 256QAM, QPSK, QPSK 17 16QAM, QPSK, 16QAM 49 256QAM, QPSK, 16QAM 18 16QAM, QPSK, 64QAM 50 256QAM, QPSK, 64QAM 19 16QAM, QPSK, 256QAM 51 256QAM, QPSK, 256QAM 20 16QAM, 16QAM, QPSK 52 256QAM, 16QAM, QPSK twenty one 16QAM, 16QAM, 16QAM 53 256QAM, 16QAM, 16QAM twenty two 16QAM, 16QAM, 64QAM 54 256QAM, 16QAM, 64QAM twenty three 16QAM, 16QAM, 256QAM 55 256QAM, 16QAM, 256QAM twenty four 16QAM, 64QAM, QPSK 56 256QAM, 64QAM, QPSK 25 16QAM, 64QAM, 16QAM 57 256QAM, 64QAM, 16QAM 26 16QAM, 64QAM, 64QAM 58 256QAM, 64QAM, 64QAM 27 16QAM, 64QAM, 256QAM 59 256QAM, 64QAM, 256QAM 28 16QAM, 256QAM, QPSK 60 256QAM, 256QAM, QPSK 29 16QAM, 256QAM, 16QAM 61 256QAM, 256QAM, 16QAM 30 16QAM, 256QAM, 64QAM 62 256QAM, 256QAM, 64QAM 31 16QAM, 256QAM, 256QAM 63 256QAM, 256QAM, 256QAM

It should be noted that setting the preset number to 3 is only an example. The preset modulation mode set includes 4 modulation modes, namely QPSK, 16QAM, 64QAM, and 256QAM. It is also an example and cannot be understood as a limitation of the present application. Technical personnel in this field can set the specific value of the preset data according to actual needs and can set the modulation mode in the preset modulation mode set according to actual needs.

It should be noted that, in some embodiments, in order to ensure that the modulation modes of at least two groups of sub-scrambled signals are different, the MCS table is modified, and the modulation schemes in which the modulation mode of each sub-scrambled signal is QPSK, the modulation mode of each sub-scrambled signal is 16QAM, the modulation mode of each sub-scrambled signal is 64QAM, and the modulation mode of each sub-scrambled signal is 256QAM in the preset modulation mapping table are deleted. If the four modulation schemes in the preset modulation mapping table are deleted, the range of MCS is updated to 0 to 59.

It can be understood that, referring to Fig. 3, Fig. 3 is a schematic diagram of a sub-process of a communication method provided in an embodiment of the present application. Before obtaining the combined modulated signal, step S310 and step S320 are included.

Step S310, obtaining angle information to be adjusted;

Step S320: performing constellation rotation on each group of sub-modulation signals according to the angle information, and updating the corresponding sub-modulation signals.

It can be understood that, according to the angle information, the angle information includes a preset number of angles, and the corresponding sub-modulation signal is constellation rotated according to the angle to update the corresponding sub-modulation signal. For example, one group of sub-modulation signals is represented as:

The sub-modulation signal is constellation rotated to update the corresponding sub-modulation signal. The updated sub-modulation signal is expressed as:

g ₀ = (real(e ₀ )*cos(θ)-imag(e ₀ )*sin(θ))+j*(real(e ₀ )*sin(θ)+imag(e ₀ )*cos(θ ))

g ₁ = (real(e ₁ )*cos(θ)-imag(e ₁ )*sin(θ))+j ^* (real(e ₁ )*sin(θ)+imag(e ₁ )*cos(θ ))

The value range of θ is 0° to 90°. real() represents the real part of the complex number, and imag() represents the imaginary part of the complex number.

It should be noted that, in this embodiment, the angle information is stored in the DCI, the first communication end is preset with the DCI, and obtains the angle information from the DCI.

Specifically, refer to Figure 4, which is a constellation diagram of a signal of an embodiment of the present application; in Figure 4, the preset number is 3, and the MCS value is 41, then the target modulation modes of the three groups of sub-scrambled signals are 64QAM, 64QAM, and 16QAM, respectively. After modulation, three groups of sub-modulation signals are obtained, and the angle information includes three angles, namely 61°, 81°, and 48°. The constellation of the first group of sub-modulation signals is rotated 61° to obtain an updated first group of sub-modulation signals, the constellation of the second group of sub-modulation signals is rotated 81° to obtain an updated second group of sub-modulation signals, and the constellation of the third group of sub-modulation signals is rotated 48° to obtain a third group of sub-modulation signals. Figure 4 is a schematic diagram of the constellations of the three updated groups of sub-modulation signals.

Specifically, refer to Figure 5, which is a constellation diagram of a signal of an embodiment of the present application; in Figure 5, the preset number is 3, and the MCS value is 15, then the target modulation modes of the three groups of sub-scrambled signals are QPSK, 256QAM, and 256QAM, respectively. After modulation, three groups of sub-modulation signals are obtained, and the angle information includes 3 angles, namely 45°, 74°, and 83°. The constellation of the first group of sub-modulation signals is rotated 45° to obtain an updated first group of sub-modulation signals, the constellation of the second group of sub-modulation signals is rotated 74° to obtain an updated second group of sub-modulation signals, and the constellation of the third group of sub-modulation signals is rotated 83° to obtain an updated third group of sub-modulation signals. Figure 5 is a schematic diagram of the constellations of the three updated groups of sub-modulation signals.

It can be understood that, in some embodiments, step S110 may include the following steps:

Adding a checksum to the initial signal;

Encoding the initial signal to obtain an encoded signal;

The coded signal is scrambled to obtain a scrambled signal.

从而得到加扰后的序列

For example, the check code is a cyclic redundancy check (CRC) code, and the initial signal is represented by: a ₀ , a ₁ , ..., a _A-1 ; where A is the length of the initial signal. The CRC code is added to the initial signal, and the initial signal after adding the check code is b ₀ , b ₁ , ..., b _B-1 = a ₀ , a ₁ , ..., a _A-1 , p ₀ , p ₁ , ..., p _L-1 , where B = A + L, and p ₀ , p ₁ , ..., p _L-1 are check bits. Then the initial signal is encoded. In the 5G communication network, two encoding methods are used: LDPC code and POLAR code. LDPC code is a low-density parity check code, which is mainly used for PDSCH channels, and POLAR code is a polarization code, which is mainly used for PBCH and PDCCH channels. The encoded signal is d ₀ , d ₁ , ..., d _N-1 . Then, the coded signal is scrambled to obtain a scrambled signal. A scrambled sequence c ₀ , c ₁ , ..., c _N-1 with the same length as the sequence to be scrambled d ₀ , d ₁ , ..., d _N-1 is first generated, and then modulo-2 addition is performed with the sequence to be scrambled, which is expressed as:

So as to obtain the scrambled sequence

It can be understood that the transmission signal includes downlink control information; wherein the downlink control information includes modulation and coding strategy information and angle information. It should be noted that the combined modulation signal is carried by the physical downlink shared channel (PDSCH), and the downlink control information (DCI) is carried by the physical downlink control channel (PDCCH). When generating the transmission signal, the first communication end maps all channels and all signals to the same time-frequency resource map, that is, the combined modulation signal, downlink control information, PDSCH channel, and PDCCH channel are mapped to the same time-frequency resource map to obtain the frequency domain data to be sent, and then the OFDM (Orthogonal Frequency Division Multiplexing) technology is used to convert the frequency domain data to be sent into the time domain data to be sent, and the time domain data to be sent is used as the transmission signal, and then the first communication end sends the transmission signal to the second communication end.

It is worth noting that the DCI in the related art occupies 5 bits, while in some embodiments of the present application, the MCS value range is 0 to 63, and at least 6 bits are required to represent it, so the number of bits for MCS in the DCI needs to be extended to 6.

It is worth noting that the DCI includes angle information so that the second communication terminal can obtain the angle information by parsing the DCI, thereby performing a reverse constellation rotation on the signal. Therefore, in the DCI, a new Angle parameter with a length of 6 bits is required after the MCS to indicate the angle.

In a second aspect, the present application embodiment provides a communication method applied to a second communication terminal. Referring to FIG. 6 , FIG. 6 is a flow chart of the communication method applied to the second communication terminal of the present application embodiment. The communication method applied to the second communication terminal may include but is not limited to steps S610, S620, S630, and S640.

Step S610, receiving a transmission signal sent by a first communication terminal, and parsing the transmission signal to obtain a combined modulated signal;

Step S620, dividing the combined modulated signal into a preset number of groups of sub-modulated signals;

Step S630, according to the modulation and coding strategy information corresponding to the combined modulation signal, analyzing each sub-modulation signal to obtain a corresponding sub-scrambled signal;

Step S640: obtaining an initial signal according to each of the sub-scrambled signals.

The second communication terminal receives the transmission signal sent by the first communication terminal, and parses the transmission signal to obtain a combined modulation signal, and then divides the combined modulation signal into a preset number of groups of sub-modulation signals; then, according to the modulation and coding strategy information, each group of sub-modulation signals is demodulated to obtain the corresponding sub-scrambled signal, and the initial signal is obtained according to each sub-scrambled signal. The first communication terminal expands the signal from the traditional single modulation mode to a mixture of multiple modulation modes at the physical layer, which increases the difficulty of identifying the data after it is intercepted, so as to ensure the security of communication. There is no need to encrypt the data at the application layer, and the impact on the data transmission load is small, so the impact on the communication efficiency is small, and the communication efficiency can be guaranteed. At the second communication terminal, the data needs to be identified according to the modulation and coding strategy information to obtain the real initial signal, which can ensure the security of communication.

It should be noted that the transmission signal received by the second communication end is a timing signal. The service information is converted from time domain data to frequency domain data through OFDM technology, and then the frequency domain data is demapped to obtain the signals of each channel, so that the combined modulated signal can be received.

It should be noted that the second communication end can be a terminal, for example, it can be a mobile device (for example, a mobile phone, a portable music player, a personal digital assistant, a dedicated messaging device, a portable gaming device), a desktop computer, an intelligent robot, an intelligent voice interaction device, a smart home appliance, and a vehicle-mounted terminal, etc., any terminal with data processing and page display functions.

It should be noted that the first communication end and the second communication end may pre-agree on a specific value of a preset number; in some embodiments, the first communication end and the second communication end pre-agree on the same modulation and coding strategy information.

It can be understood that, referring to Figure 7, Figure 7 is a schematic diagram of a sub-process of the communication method of an embodiment of the present application. Step S630 may include step S710 and step S720.

Step S710, determining a target modulation mode corresponding to each group of sub-scrambled signals from a preset modulation mapping table according to the value of the modulation and coding strategy information;

Step S720: demodulate the corresponding sub-modulation signal according to the target modulation mode to obtain a corresponding sub-scrambled signal.

For example, when the preset number is 3 and the MCS value is 2, the second communication end determines the target modulation mode corresponding to each group of sub-scrambled signals from the preset modulation mapping table according to the MCS value. According to Table 2, the target modulation modes of the three groups of sub-scrambled signals are QPSK, QPSK, and 64QAM, respectively. When the modulation mode of each group of sub-scrambled signals is known, each group of sub-scrambled signals can be demodulated to obtain the corresponding sub-scrambled signals.

It can be understood that, referring to FIG. 8 , which is a schematic diagram of a sub-process of the communication method according to an embodiment of the present application, before step S630, step S810 may also be included:

Step S810: Perform a reverse constellation rotation on each group of sub-modulation signals according to the angle information to update the corresponding sub-modulation signals.

In some embodiments, the first communication terminal and the second communication terminal pre-agreed on the same angle information. The angle information includes a preset number of angles, and the first communication terminal performs constellation rotation on the corresponding sub-modulation signal according to the angles to update the corresponding sub-modulation signal; therefore, before the second communication terminal performs demodulation, it is necessary to perform a reverse constellation rotation on each group of sub-modulation signals according to the angle information to update the corresponding sub-modulation signal.

It can be understood that the transmission signal also includes downlink control information, wherein the downlink control information includes modulation and coding strategy information and angle information;

9 , the communication method may further include step S910 .

Step S910, parse the transmission signal to obtain downlink control information, and obtain modulation and coding strategy information and angle information from the downlink control information.

The transmission signal includes downlink control information, wherein the downlink control information includes modulation and coding strategy information and angle information; therefore, the second communication end parses the transmission signal to obtain the downlink control information, and obtains the modulation and coding strategy information and angle information from the downlink control information. Thus, the angle information and the modulation and coding strategy information can be obtained to parse the combined modulated signal.

It is understandable that step S640 may include the following steps:

Combining the sub-scrambled signals to obtain a scrambled signal;

Descrambling the scrambled signal to obtain the encoded signal;

Decoding the coded signal and verifying the check code of the decoded coded signal;

When the check code is verified to be correct, the coded signal is used as the initial signal.

The sub-scrambled signals are combined to obtain a scrambled signal, the scrambled signal is descrambled to obtain a coded signal, and then the coded signal is decoded, and the check code of the decoded coded signal is checked, for example, CRC verification is performed on the coded signal. When the verification is correct, the coded signal is used as the initial signal. If an error is found in the verification, it means that an error has occurred in the data transmission, and the data may be tampered with during the data transmission process.

In the third aspect, referring to Figure 10, an embodiment of the present application provides a communication device 300, including a memory 310 and a processor 320, the memory 310 stores a computer program, and the processor 320 implements the communication method of the first aspect embodiment or the second aspect embodiment of the present application when executing the computer program.

The processor 320 and the memory 310 may be connected via a bus or in other ways.

The memory 310, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 310 may include a high-speed random access memory 310, and may also include a non-transitory memory 310, such as at least one disk memory 310, a flash memory device, or other non-transitory solid-state memory 310. In some embodiments, the memory 310 optionally includes a memory 310 remotely arranged relative to the processor 320, and these remote memories 310 can be connected to the processor 320 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

It should be noted that the non-transient software programs and instructions required to implement the communication method of the above embodiment are stored in the memory 310. When executed by the processor 320, the communication method in the above embodiment is executed, for example, the method steps S110 to S150 in Figure 1, the method steps S210 to S220 in Figure 2, the method steps S310 to S320 in Figure 3, the method steps S610 to S640 in Figure 6, the method steps S710 to S720 in Figure 7, the method step S810 in Figure 8, and the method step S910 in Figure 9 described above are executed.

The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, in a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a program. When the program is executed by a processor, it implements the communication method of the first or second aspect of the present application.

The program of the present application is executed by a processor or a controller, for example, by a processor in the above-mentioned device embodiment, so that the above-mentioned processor can execute the communication method in the above-mentioned embodiment, for example, execute the method steps S110 to S150 in Figure 1, the method steps S210 to S220 in Figure 2, the method steps S310 to S320 in Figure 3, the method steps S610 to S640 in Figure 6, the method steps S710 to S720 in Figure 7, the method step S810 in Figure 8, and the method step S910 in Figure 9 described above.

It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims (10)

1. A communication method, characterized in that it is applied to a first communication end, the method comprising: Acquire an initial signal, and perform signal processing on the initial signal to obtain a scrambled signal; Dividing the scrambled signal into a preset number of groups of sub-scrambled signals; According to preset modulation and coding strategy information, each group of the sub-scrambled signals is modulated to obtain corresponding sub-modulated signals; wherein the modulation and coding strategy information is used to determine the modulation mode of each group of the sub-scrambled signals; at least two groups of the sub-scrambled signals are modulated using different modulation modes; Obtaining a combined modulated signal according to a preset number of groups of sub-modulated signals; A transmission signal for communicating with the second communication end is generated according to the combined modulated signal. 2. The communication method according to claim 1, characterized in that the step of modulating each group of the sub-scrambled signals according to preset modulation and coding strategy information to obtain corresponding sub-modulated signals comprises: Determining, according to the value of the modulation and coding strategy information, a target modulation mode corresponding to each group of the sub-scrambled signals from a preset modulation mapping table; The corresponding sub-scrambled signal is modulated according to the target modulation mode to obtain a corresponding sub-modulated signal. 3. The communication method according to claim 1, characterized in that before obtaining the combined modulated signal, it comprises: Get the angle information to be adjusted; According to the angle information, constellation rotation is performed on each group of sub-modulation signals to update the corresponding sub-modulation signals. 4. The communication method according to claim 3 is characterized in that the transmission signal includes downlink control information; wherein the downlink control information includes the modulation and coding strategy information and the angle information. 5. A communication method, characterized in that it is applied to a second communication terminal, the method comprising: Receiving a transmission signal sent by the first communication terminal, and parsing the transmission signal to obtain a combined modulated signal; Dividing the combined modulated signal into a preset number of groups of sub-modulated signals; According to the modulation and coding strategy information corresponding to the combined modulation signal, each sub-modulation signal is parsed to obtain a corresponding sub-scrambled signal; An initial signal is obtained according to each of the sub-scrambled signals. 6. The communication method according to claim 5, characterized in that the step of parsing each sub-modulation signal to obtain a corresponding sub-scrambled signal according to the modulation and coding strategy information corresponding to the combined modulation signal comprises: Determining, according to the value of the modulation and coding strategy information, a target modulation mode corresponding to each group of the sub-scrambled signals from a preset modulation mapping table; The corresponding sub-modulation signal is demodulated according to the target modulation mode to obtain a corresponding sub-scrambled signal. 7. The communication method according to claim 5, characterized in that before parsing each sub-modulation signal to obtain a corresponding sub-scrambled signal according to the modulation and coding strategy information corresponding to the combined modulation signal, it also includes: According to the angle information, a reverse constellation rotation is performed on each group of sub-modulation signals to update the corresponding sub-modulation signals. 8. The communication method according to claim 5, characterized in that the transmission signal further includes downlink control information, wherein the downlink control information includes the modulation and coding strategy information and the angle information; The method further comprises: The downlink control information is obtained by parsing the transmission signal, and the modulation and coding strategy information and the angle information are obtained from the downlink control information. 9. A communication device, comprising a memory and a processor, wherein the memory stores a computer program, wherein the processor implements the communication method according to any one of claims 1 to 8 when executing the computer program. 10. A computer-readable storage medium storing a program, wherein the program, when executed by a processor, implements the communication method according to any one of claims 1 to 8.

Images