CN114826856B - Wireless communication method and device based on carrier modulation and communication terminal - Google Patents
Wireless communication method and device based on carrier modulation and communication terminal Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a wireless communication method, a device and a communication terminal based on carrier modulation, wherein the method is used for a sensor node and comprises the following steps: acquiring data to be transmitted; encoding data to be transmitted; the method comprises the steps of modulating coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, directly framing the modulated data to be transmitted, and forwarding the data to an access node through an aggregation node, wherein the modulation mode between the aggregation node and the access node is a multi-carrier modulation mode. The invention not only can meet the requirement of the sensing node on low-power transmission, but also can achieve the purpose of transmitting data to be transmitted to the sink node at high speed. And data to be transmitted is modulated between the sink node and the access node through multiple carriers, so that an asymmetric physical layer structure of the wireless sensor network architecture is finally formed, the power consumption of sensor node data transmission is reduced, and the access of the sink node to broadband high-speed sensing service is ensured.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a wireless communication method and apparatus based on carrier modulation, and a communication terminal.
Background
With the continuous promotion of energy internet of things construction, the internet of things has put forward higher requirements on the depth, breadth and density of information perception, and the demands on sensors and sensing networks are in explosive growth. At present, the sensing network technology represented by low-power consumption wireless communication has the advantages of mass connection, low cost and the like, but also has the problems of multiple technical systems, large network protocol difference and non-uniform interface specification, and when the sensing network technology is directly applied to a network, the sensing network technology has adaptation deviation with the power sensing service requirement in the aspects of communication rate, transmission distance, module power consumption and the like.
Currently, a wireless sensor network architecture applied to the sensing service of the internet of things is shown as 1, and mainly comprises three types of equipment: sensor module, sink node, access node. The sensor module mainly transmits numerical value class, environment quantity and state quantity information of sensors such as partial discharge, current, temperature and the like; the sink node supports the access of the sensor module and can forward data for other sink nodes; the access node is responsible for managing and maintaining the entire network.
In the practical application scene of the Internet of things, the sensor module does not have a wired continuous power supply condition, is mainly powered by a battery, and is low in installation environment space, so that high requirements are provided for low power consumption, complexity, size and the like. Currently, the physical layer technology of the wireless sensor network is mainly LoRa, zigBee, BLE, wiFi. The LoRa/ZigBee/BLE wireless communication mode adopts a single carrier modulation technology, and the WiFi adopts a multi-carrier modulation mode.
In the related art, in the wireless sensor network architecture in fig. 1, a single carrier modulation technology is generally uniformly used to establish wireless network communication between a sensor and a convergence/access node, and between the convergence node and the convergence/access node, and the single carrier modulation technology also relates to complex processing procedures such as scrambling, coding, modulation, interleaving, framing, etc., which on one hand results in increased transmission power consumption, and on the other hand cannot meet the requirement of the convergence node on access of broadband high-speed sensing service, and affects data transmission efficiency.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problems that the wireless communication mode in the prior art causes the increase of transmission power consumption, and the access requirement of the sink node to the broadband high-speed sensing service cannot be met to influence the data transmission efficiency, so as to provide a wireless communication method, a wireless communication device and a wireless communication terminal based on carrier modulation.
According to a first aspect, an embodiment of the present invention provides a wireless communication method based on carrier modulation, for a sensor node, including the steps of:
acquiring data to be transmitted;
encoding the data to be transmitted based on a first preset encoding mode;
modulating the coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, wherein the first preset physical layer frame structure comprises a single carrier synchronous head, a single carrier physical layer head and a first effective load for loading the data to be transmitted;
and directly framing the modulated data to be transmitted, and then forwarding the data to be transmitted to an access node through a sink node, wherein the modulation mode between the sink node and the access node is a multi-carrier modulation mode.
In an optional implementation manner of the first aspect, the first preset modulation order includes a plurality of different preset modulation parameters, and the single carrier synchronization header stores a preamble and a frame start detection code; the single carrier physical layer header stores the first preset coding mode, the single carrier modulation mode, the first preset modulation order and the data length of the first payload.
In another optional implementation manner of the first aspect, after the step of modulating the coded data to be transmitted by the first preset physical layer frame structure and the first preset modulation order based on the single carrier modulation mode, the method further includes:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
According to the embodiment of the invention, through implementing the first aspect, in the process of communication interaction between the sensing node and the sink node, the data to be transmitted is sequentially subjected to coding, single carrier modulation and framing, so that the requirement of the sensing node on low-power transmission can be met, and the aim of transmitting the data to be transmitted to the sink node at high speed can be achieved. And data to be transmitted is modulated between the sink node and the access node through multiple carriers, and an asymmetric physical layer structure of the wireless sensor network architecture is finally formed, so that on one hand, the power consumption of data transmission of the sensor node is reduced, and on the other hand, the access of the sink node to broadband high-speed sensing service is ensured.
According to a second aspect, an embodiment of the present invention further provides a wireless communication method based on carrier modulation, for an aggregation node, including the following steps:
receiving data to be transmitted sent by a sensing node;
scrambling the data to be transmitted;
encoding the data to be transmitted based on a second preset encoding mode;
interleaving the coded data to be transmitted;
modulating the interleaved data to be transmitted through a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, wherein the second preset physical layer frame structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load for loading the data to be transmitted;
carrying out framing processing on the modulated data to be transmitted after Fourier transformation;
transmitting the framed data and the data to be transmitted is transmitted to the access node.
In an optional implementation manner of the first aspect, the multi-carrier synchronization header stores a short training sequence and a long training sequence, and the multi-carrier physical layer header stores a bandwidth, a frame length, the multi-carrier modulation mode, the second preset modulation order, and the second preset coding mode, and a data length of the second payload.
In another optional implementation manner of the first aspect, before the step of sending the framed data to be transmitted to an access node, the method further includes:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
According to the invention, by implementing the second aspect, a multi-carrier modulation mode is adopted between the sink node and the access node, and OFDM signals are formed based on Fourier transformation, so that the frequency spectrum utilization rate and the transmission rate are improved, and simultaneously, the channel coding and the interleaving processing are adopted in the processing process, so that the anti-interference capability of multi-carrier physical layer signals is improved, and the single-hop transmission distance and the network coverage range are enlarged.
According to a third aspect, an embodiment of the present invention further provides a wireless communication device based on carrier modulation, for a sensor node, including:
the first data acquisition module is used for acquiring data to be transmitted;
the data first coding module is used for coding the data to be transmitted based on a first preset coding mode;
the data first modulation module is used for modulating the coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, wherein the first preset physical layer frame structure comprises a single carrier synchronous head, a single carrier physical layer head and a first effective load for loading the data to be transmitted;
the data first sending module is used for directly framing the modulated data to be transmitted and then forwarding the data to an access node through a sink node, and the modulation mode between the sink node and the access node is a multi-carrier modulation mode.
According to a fourth aspect, an embodiment of the present invention further provides a wireless communication device based on carrier modulation, configured to be used by a sink node, including:
the data second acquisition module is used for receiving data to be transmitted sent by the sensing node;
the scrambling data processing module is used for scrambling the data to be transmitted;
the data second coding module is used for coding the data to be transmitted based on a second preset coding mode;
the data interleaving processing module is used for interleaving the coded data to be transmitted;
the data second modulation module is used for modulating the data to be transmitted after interleaving through a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, and the second preset physical layer frame structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load for loading the data to be transmitted;
the data framing processing module is used for carrying out framing processing on the modulated data to be transmitted after Fourier transformation;
and the data second sending module is used for sending the data to be transmitted after framing processing to an access node.
According to a fifth aspect, an embodiment of the present invention further provides a computer readable storage medium, where computer instructions are stored, where the computer instructions are configured to cause the computer to perform the wireless communication method based on carrier modulation according to any implementation of the first aspect or the second aspect.
According to a sixth aspect, an embodiment of the present invention further provides a communication terminal, including: the wireless communication system comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the wireless communication method based on carrier modulation according to the first aspect or the second aspect by executing the computer instructions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a wireless sensor network architecture for sensing services of an internet of things in an embodiment of the present invention;
fig. 2 is a flowchart of a specific example of a wireless communication method based on carrier modulation in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first predetermined physical layer structure according to an embodiment of the present invention;
fig. 4 is a flowchart of a specific example of a wireless communication method based on carrier modulation in an embodiment of the present invention;
FIG. 5 is a diagram illustrating a second pre-configured physical layer structure according to an embodiment of the present invention;
fig. 6 is a block diagram of a wireless communication device based on carrier modulation according to an embodiment of the present invention;
fig. 7 is another block diagram of a wireless communication device based on carrier modulation in an embodiment of the present invention;
fig. 8 is a schematic diagram of a hardware structure of a communication terminal according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The embodiment of the invention provides a wireless communication method based on carrier modulation, which can be applied to a communication terminal, wherein the communication terminal can be used as a sensing node, and a sensor in the communication terminal is limited by a size and a power supply mode and has urgent requirements for low power consumption/ultra-low power consumption. In view of this, the wireless communication method based on adjustable pulse width according to the embodiment of the present invention, as shown in fig. 2, includes the following steps:
step S21: and acquiring data to be transmitted.
The data to be transmitted receives data input of a data link layer through a physical layer of the sensing node, and the data to be transmitted is data which the sensing node prepares to send to the sink node.
Step S22: and encoding the data to be transmitted based on a first preset encoding mode.
For example: setting a first preset coding mode of M different preset coding rates through a coding module, wherein the coding module can be a coding module with a code rate of K. For example: m different preset coding rates are k respectively 1 ，k 2 ，...，k M . In the embodiment of the invention, the data to be transmitted can be encoded and processed based on any one of M different preset encoding code rates through the encoding module with the code rate of K. In the step S22, the data to be transmitted is encoded based on the first preset encoding mode, so that the reliability of data communication in different channel environments can be improved.
The data to be transmitted is directly encoded after being acquired, and is not further processed through scrambling, so that the transmission power consumption of the sensing node can be further reduced while the data to be transmitted is transmitted at a high rate.
In an optional embodiment, the step S22, based on a first preset encoding mode, encodes data to be transmitted, including:
the first step: and acquiring the current data length of the data to be transmitted.
For example: the current data length of the data to be transmitted is denoted by L in bits.
And a second step of: and encoding the data to be transmitted according to the current data length and the first preset encoding mode. For example: the code rate of the first preset code mode is k 2 =1/2, e.g.: the length of the coding result is denoted by W, l=6bit, then W 2 ＝L/k 1 ＝6/(1/2)＝12Bit。
Step S23: the method comprises the steps of modulating coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, wherein the first preset physical layer frame structure comprises a single carrier synchronous head, a single carrier physical layer head and a first effective load for loading the data to be transmitted. The first preset modulation order includes a plurality of different preset modulation parameters.
The single carrier modulation mode has the advantages of higher communication rate and less access quantity of communication equipment. Therefore, the method is applied to the sensing node to meet the requirement of low power consumption.
In one embodiment, a single carrier synchronization header in the first preset physical layer structure stores a preamble and a frame start detection code; the single carrier physical layer header in the first preset physical layer structure stores a first preset coding mode, a single carrier modulation mode, a first preset modulation order and a data length of a first payload. As shown in fig. 3, a schematic diagram of a first preset physical layer structure is shown. The first preset physical layer structure comprises a single carrier synchronization head, a single carrier physical layer head and a first payload in sequence, wherein the single carrier synchronization head mainly comprises a Preamble (Preamble) and a SFD (Start Frame Detection, frame start detection code) which are convenient for frequency synchronization and time synchronization of sink node data. The single carrier physical layer header carries configuration information of a sensing node and comprises two parts, namely a TMI (Tone Mode Index) and a Frame Len (Frame length), wherein the TMI carries information such as a single carrier modulation Mode, a first preset modulation order, a first preset coding Mode and the like of the sensing node, the Frame Len indicates the data length of a first effective load, and the length unit is byte and B; the first Payload portion carries upper layer data, of variable length.
If the bandwidth of the physical layer modulation signal in the single carrier modulation mode is B, the physical layer rate is:
S＝B·k·l；
wherein S is the physical layer rate, k is the preset code rate in the first preset code mode, and l is the first preset modulation order. If the first preset coding code rate in the first preset mode has M different configurations, and the first preset modulation order has N different configurations, the single carrier physical layer has M.N different physical layer rates, and the method can adapt to different wireless sensing services and wireless channel environments.
Step S24: and directly framing the modulated data to be transmitted, and then forwarding the data to the access node through the sink node, wherein the modulation mode between the sink node and the access node is a multi-carrier modulation mode.
In step S24, the data to be transmitted in the single carrier modulation mode is directly sent to the framing module, and complete frame data is formed according to the preset frame format, without further interleaving processing, so that the transmission power consumption of the sensing node can be further reduced while the data to be transmitted in the high-speed transmission is satisfied.
According to the wireless communication method based on carrier modulation, in the process of communication interaction between the sensing node and the sink node, coding, single carrier modulation and framing are sequentially carried out on data to be transmitted, so that the requirement of the sensing node on low-power-consumption transmission can be met, the aim of transmitting the data to be transmitted to the sink node at high speed can be achieved, the data to be transmitted between the sink node and the access node is modulated through multiple carriers, an asymmetric physical layer structure of a wireless sensing network architecture is finally formed, on one hand, the power consumption of data transmission of the sensing node is reduced, and on the other hand, the access of the sink node to broadband high-speed sensing service is guaranteed.
In one embodiment, after step S23 of modulating the encoded data to be transmitted by the first preset physical layer frame structure and the first preset modulation order based on the single carrier modulation mode, the method further includes:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
For example: the pulse width modulation signals corresponding to the data to be transmitted are formed into complete data frames according to a preset frame format, the complete data frames are sent into a DAC (Digital-to-Analogue Converter, digital-to-analog converter), and the complete data frames are finally sent into a wireless channel after being processed by an analog circuit.
At the receiving end, the original data is finally recovered through corresponding inverse operation, and the data is output. The transmitting end is configured with the pulse width duration of the modulation signal, so that the transmission duration of the transmission signal is reduced, the transmitting power consumption of the sensor is reduced, and the signal demodulation duration is correspondingly reduced at the receiving end, so that the signal processing power consumption of the receiving end is also reduced.
For example: a communication terminal is used as a receiving end of a sensing node, and mainly carries out synchronous, frame removing, single carrier modulation mode demodulation and decoding processes on received data to be transmitted in sequence. The specific process is as follows:
the first step: and receiving data to be transmitted.
The data to be transmitted is received by a physical layer of a receiving end through a data input of a data link layer, and the data is generally converted by an analog-to-Digital Converter (ADC).
And a second step of: and carrying out synchronous processing on the data to be transmitted.
The data to be transmitted can be synchronized in frequency and time through the synchronization module, the frequency and the phase are locked, and meanwhile the starting position of a transmitting signal is found.
And a third step of: and carrying out frame disassembly processing on the data to be transmitted based on the synchronous signals corresponding to the data to be transmitted.
Here, the configuration parameters of the transmitting end and the data to be transmitted loaded by the first payload may be obtained through frame disassembly processing.
Fourth step: and demodulating the data to be transmitted based on a single carrier modulation mode. The single carrier modulation method is the same as that of the transmitting end.
The data to be transmitted after frame disassembly processing is directly demodulated in a single carrier modulation mode, and further de-interleaving processing is not needed, so that the transmission power consumption of a receiving end can be further reduced while the data to be transmitted is transmitted at a high rate.
Fifth step: and decoding the demodulated data to be transmitted.
The demodulated data to be transmitted passes through the decoding module, finally recovers the original data, and outputs the data.
Example 2
The embodiment of the invention also provides a wireless communication method based on carrier modulation, which can be applied to a communication terminal, wherein the communication terminal can be used as a sink node. The aggregation node and the access node can adopt a wired power supply or battery and solar power supply mode, the requirement on power consumption is not high, but the differentiated sensing service data access and transmission of a plurality of sensor nodes are required to be realized, and therefore, the requirements on the communication rate and the transmission distance are high. In view of this, the wireless communication method based on adjustable pulse width according to the embodiment of the present invention, as shown in fig. 4, includes the following steps:
step S41: and receiving data to be transmitted sent by the sensing node.
The data to be transmitted receives data input of a data link layer through a physical layer of the sink node.
Step S42: scrambling is carried out on the data to be transmitted.
The scrambling process is to change the binary code sequence corresponding to the data to be transmitted to make it approximate to the random sequence, i.e. the signal code after regular randomization. Advantageously, the probability of continuous length of data being 0 or 1 is reduced.
Step S43: and encoding the data to be transmitted based on a second preset encoding mode. For example: the second preset coding modes of M different preset coding rates are set through the coding modules, the coding modules can be the coding modules with the code rate of K, and the coding modules with the code rate of K are adjustable. For example: m different preset coding rates are k respectively 1 ，k 2 ，...，k M . In the embodiment of the invention, the data to be transmitted can be encoded and processed based on any one of M different preset encoding code rates through the encoding module with the code rate of K. In the step S22, the data to be transmitted is encoded based on the first preset encoding mode, so that the reliability of data communication in different channel environments can be improved. Therefore, the first preset encoding mode and the second preset encoding mode can be the same.
In an optional embodiment, the step S42 encodes the data to be transmitted based on the second preset encoding mode, including:
the first step: and acquiring the current data length of the data to be transmitted.
For example: the current data length of the data to be transmitted is denoted by L in bits.
And a second step of: and encoding the data to be transmitted according to the current data length and a second preset encoding mode. For example: the coding rate of the second preset coding mode is k 2 =1/2, e.g.: the length of the coding result is denoted by W, l=6bit, then W 2 ＝L/k 1 ＝6/(1/2)＝12Bit。
Step S44: and interleaving the coded data to be transmitted.
Since a deep fade trough, which is long lasting, affects a succession of bits over a parametric channel such as terrestrial mobile communications, bit errors often occur in strings. However, channel coding can only detect and correct single errors and error strings that are not too long. To solve the problem of bit errors in strings, an interleaving process is used: consecutive bits in a message are spread apart, i.e. consecutive bits in a message are sent in a non-consecutive manner, so that even if a string error occurs during transmission, the error becomes a single (or very short length) error bit when a message of consecutive bit strings is recovered.
Therefore, in this step S44, the data transmission quality can be further improved by interleaving the data to be transmitted.
Step S45: the data to be transmitted after interleaving is modulated through a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, wherein the second preset physical layer frame structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load for loading the data to be transmitted.
In one embodiment, a multi-carrier synchronization header in the multi-carrier modulation scheme stores a short training sequence and a long training sequence, and a multi-carrier physical layer header stores a bandwidth, a frame length, a multi-carrier modulation scheme, a second preset modulation order, and a second preset coding scheme, and a data length of a second payload. Fig. 5 is a schematic diagram of a second preset physical layer structure. The second preset physical layer structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load in sequence respectively. The multi-carrier synchronization head is mainly used for time synchronization, frequency offset estimation and channel estimation of the sink node data, and comprises a short training sequence and a long training sequence, wherein the short training sequence is used for time synchronization and coarse frequency offset estimation, and the long training sequence is used for fine frequency offset estimation and channel estimation. The multi-carrier physical layer header carries configuration information of the aggregation node, including information such as the length of the second payload, a multi-carrier modulation mode, a second preset coding mode, channel bandwidth and the like. The second payload portion carries upper layer data, the data length being variable.
Through the step S45, the interleaved data is digitally modulated, and the modulation mode can be adaptively selected for different services. For example: the narrowband service can select a low-order digital modulation mode, so that the communication reliability is ensured, and the broadband service selects a high-order digital modulation mode, so that the service bearing capacity is improved.
Step S46: and carrying out framing processing on the modulated data to be transmitted after Fourier transformation.
The fourier transform is abbreviated as IFFT transform herein, and in order to quickly form an orthogonal frequency division multiplexing modulated signal, abbreviated as OFDM signal, the communication rate and the transmission distance are further improved.
Step S47: and sending the data to be transmitted after framing treatment to the access node.
According to the wireless communication method based on carrier modulation, a multi-carrier modulation mode is adopted between the sink node and the access node, OFDM signals are formed based on Fourier transformation, the frequency spectrum utilization rate and the transmission rate are improved, meanwhile, channel coding and interleaving processing are adopted in the processing process, the anti-interference capability of multi-carrier physical layer signals is improved, and the single-hop transmission distance and the network coverage range are enlarged.
In one embodiment, in the wireless communication method based on carrier modulation, S47 before the step of sending the framed data to be transmitted to the access node, the method further includes:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
For example: the pulse width modulation signals corresponding to the data to be transmitted are formed into complete data frames according to a preset frame format, the complete data frames are sent into a DAC (Digital-to-Analogue Converter, digital-to-analog converter), and the complete data frames are finally sent into a wireless channel after being processed by an analog circuit.
At the receiving end, the original data is finally recovered through corresponding inverse operation, and the data is output. The multi-carrier modulation mode is adopted at the transmitting end, the OFDM signal is formed based on Fourier transform, the frequency spectrum utilization rate and the transmission rate are improved, the transmission distance and the network coverage range are enlarged, the communication efficiency is improved, and the communication efficiency of the signal is correspondingly improved at the receiving end.
For example: a communication terminal is used as a receiving end of a sensing node, and mainly performs synchronization, frame removal, fourier transformation, channel estimation, demodulation, de-interleaving, channel decoding and de-scrambling processes on received data to be transmitted in sequence. The specific process is as follows:
the first step: and receiving data to be transmitted.
The data to be transmitted is received by a physical layer of a receiving end through a data input of a data link layer, and the data is generally converted by an analog-to-Digital Converter (ADC).
And a second step of: and carrying out synchronous processing on the data to be transmitted.
The data to be transmitted can be synchronized in frequency and time through the synchronization module, the frequency and the phase are locked, and meanwhile the starting position of a transmitting signal is found.
And a third step of: and carrying out frame disassembly processing on the data to be transmitted based on the synchronous signals corresponding to the data to be transmitted.
Here, through frame splitting processing, configuration parameters of the transmitting end, namely, two parts of data of a long training sequence and a second payload, can be obtained, wherein the long training sequence is input into a channel estimation module to obtain impact response information in a wireless channel.
Fourth step: and carrying out Fourier transformation on the second payload of the data to be transmitted to obtain a solution OFDM signal.
Fifth step: the OFDM signal is demodulated based on a multi-carrier modulation scheme.
Sixth step: and finally recovering the original data and outputting the data after de-interleaving, channel decoding and de-scrambling respectively.
According to the wireless communication method based on carrier modulation, data to be transmitted is modulated between the sensing node and the sink node through a single carrier modulation mode, the data to be transmitted is modulated between the sink node and the access node through a multi-carrier modulation mode, an asymmetric physical layer structure is formed in the wireless sensing network structure, a data processing module is reduced, a physical layer structure is greatly simplified, sensor power consumption is reduced, service life of a battery power supply sensor is prolonged, meanwhile, different preset coding modes are provided, and the wireless communication method based on the carrier modulation can adapt to access of different sensing service data. The multi-carrier modulation mode is adopted between the sink node and the access node, and based on Fourier transformation, OFDM modulation signals are formed, so that the frequency spectrum utilization rate and the transmission rate are improved, meanwhile, the anti-interference capability of multi-carrier physical layer signals is improved by adopting channel coding and interleaving processing, and the single-hop transmission distance and the network coverage range are enlarged.
Based on the same concept, the embodiment of the invention also provides a wireless communication device based on carrier modulation, which is used for a sensor node, and as shown in fig. 6, the wireless communication device comprises the following modules:
a data first acquiring module 61, configured to acquire data to be transmitted;
a data first encoding module 62, configured to encode data to be transmitted based on a first preset encoding mode;
a data first modulation module 63, configured to modulate the encoded data to be transmitted according to a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, where the first preset physical layer frame structure includes a single carrier synchronization header, a single carrier physical layer header, and a first payload for loading the data to be transmitted;
the data first sending module 64 is configured to directly frame the modulated data to be transmitted and forward the data to the access node through the sink node, where a modulation mode between the sink node and the access node is a multi-carrier modulation mode.
In one embodiment, the first preset modulation order includes a plurality of different preset modulation parameters, and the single carrier synchronization head stores a preamble and a frame start detection code; the single carrier physical layer header stores a first preset encoding mode, a single carrier modulation mode, a first preset modulation order and a data length of a first payload.
In one implementation manner, the wireless communication device based on carrier modulation in the embodiment of the present invention further includes, after the data first modulation module 63:
the first data conversion module is used for performing digital-to-analog conversion processing on data to be transmitted.
Based on the same conception, the embodiment of the invention also provides a wireless communication device based on carrier modulation, which is used for an aggregation node, and as shown in fig. 7, the wireless communication device comprises the following modules:
and the data second acquisition module 71 is configured to receive data to be transmitted sent by the sensing node.
The scrambling data module 72 is configured to perform scrambling on data to be transmitted.
The data second encoding module 73 is configured to encode data to be transmitted based on a second preset encoding mode.
The data interleaving processing module 74 is configured to interleave the encoded data to be transmitted.
The data second modulation module 75 is configured to modulate the interleaved data to be transmitted according to a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, where the second preset physical layer frame structure includes a multi-carrier synchronization header, a multi-carrier physical layer header, and a second payload for loading the data to be transmitted.
The data framing processing module 76 is configured to perform framing processing on the modulated data to be transmitted after fourier transformation.
The data second transmitting module 77 transmits the framed data to be transmitted to the access node.
In one embodiment, the multi-carrier synchronization header stores a short training sequence and a long training sequence, and the multi-carrier physical layer header stores a bandwidth, a frame length, a multi-carrier modulation mode, a second preset modulation order, and a second preset coding mode, and a data length of the second payload.
In one embodiment, before the second data sending module 77, the method further includes:
the second data conversion module is used for performing digital-to-analog conversion processing on the data to be transmitted.
The embodiment of the present invention further provides a communication terminal, as shown in fig. 8, where the communication terminal may include a processor 81 and a memory 82, where the processor 81 and the memory 82 may be connected by a bus or other manners, and in fig. 8, the connection is exemplified by a bus.
The processor 81 may be a central processing unit (Central Processing Unit, CPU). The processor 81 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory 82, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 81 executes various functional applications of the processor and data processing, i.e., implements the carrier modulation based wireless communication method in the above-described embodiment, by running non-transitory software programs, instructions, and modules stored in the memory 82.
The memory 82 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created by the processor 81, etc. In addition, the memory 82 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 82 may optionally include memory located remotely from processor 81, such remote memory being connectable to processor 81 through a network. Examples of such networks include, but are not limited to, the power grid, the internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
The one or more modules are stored in the memory 82 and when executed by the processor 81, perform the carrier modulation based wireless communication method of the embodiment shown in the figures.
The details of the computer device may be understood with reference to the corresponding related descriptions and effects of the embodiments shown in the drawings, which are not repeated herein.
It will be appreciated by those skilled in the art that implementing all or part of the above-described embodiment method may be implemented by a computer program to instruct related hardware, where the program may be stored in a computer readable storage medium, and the program may include the above-described embodiment method when executed. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
1. A wireless communication method based on carrier modulation, which is used for a sensor node, comprising the following steps:
acquiring data to be transmitted;
the method comprises the steps of encoding data to be transmitted according to the current data length of the data to be transmitted and any one of M different preset encoding code rates by setting a first preset encoding mode of the M different preset encoding code rates;
modulating the coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, wherein the first preset physical layer frame structure comprises a single carrier synchronous head, a single carrier physical layer head and a first effective load for loading the data to be transmitted; the single carrier synchronization head stores a preamble and a frame start detection code; the single carrier physical layer header stores a first preset coding mode, a single carrier modulation mode, a first preset modulation order and a data length of a first effective load;
and directly framing the modulated data to be transmitted, and then forwarding the data to be transmitted to an access node through a sink node, wherein the modulation mode between the sink node and the access node is a multi-carrier modulation mode.
2. The carrier modulation based wireless communication method of claim 1, wherein the first preset modulation order comprises a plurality of different preset modulation parameters.
3. The method according to claim 1, further comprising, after the step of modulating the encoded data to be transmitted by a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation scheme:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
4. The wireless communication method based on carrier modulation is characterized by comprising the following steps of:
receiving data to be transmitted sent by a sensing node;
scrambling the data to be transmitted;
the method comprises the steps of encoding data to be transmitted according to the current data length of the data to be transmitted and any one of M different preset encoding code rates by setting a second preset encoding mode of the M different preset encoding code rates;
interleaving the coded data to be transmitted;
modulating the interleaved data to be transmitted through a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, wherein the second preset physical layer frame structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load for loading the data to be transmitted; the multi-carrier synchronous head in the multi-carrier modulation mode stores a short training sequence and a long training sequence, and the multi-carrier physical layer head stores a bandwidth, a frame length, a multi-carrier modulation mode, a second preset modulation order and a second preset coding mode, and the data length of a second effective load;
carrying out framing processing on the modulated data to be transmitted after Fourier transformation;
and sending the data to be transmitted after framing processing to an access node.
5. The method of carrier modulation based wireless communication according to claim 4, further comprising, prior to the step of transmitting the framed data to be transmitted to an access node:
and D, performing digital-to-analog conversion processing on the data to be transmitted.
6. A wireless communication device based on carrier modulation, for a sensor node, comprising:
the first data acquisition module is used for acquiring data to be transmitted;
the first data encoding module is used for encoding the data to be transmitted according to the current data length of the data to be transmitted and any one of M different preset encoding code rates by setting a first preset encoding mode of M different preset encoding code rates;
the data first modulation module is used for modulating the coded data to be transmitted through a first preset physical layer frame structure and a first preset modulation order based on a single carrier modulation mode, wherein the first preset physical layer frame structure comprises a single carrier synchronous head, a single carrier physical layer head and a first effective load for loading the data to be transmitted; the single carrier synchronization head stores a preamble and a frame start detection code; the single carrier physical layer header stores a first preset coding mode, a single carrier modulation mode, a first preset modulation order and a data length of a first effective load;
the data first sending module is used for directly framing the modulated data to be transmitted and then forwarding the data to an access node through a sink node, and the modulation mode between the sink node and the access node is a multi-carrier modulation mode.
7. A wireless communication device based on carrier modulation, which is used for an aggregation node, and comprises the following modules:
the data second acquisition module is used for receiving data to be transmitted sent by the sensing node;
the scrambling data processing module is used for scrambling the data to be transmitted;
the data second coding module is used for coding the data to be transmitted according to the current data length of the data to be transmitted and any one of M different preset coding rates by setting a second preset coding mode of M different preset coding rates;
the data interleaving processing module is used for interleaving the coded data to be transmitted;
the data second modulation module is used for modulating the data to be transmitted after interleaving through a second preset physical layer frame structure and a second preset modulation order based on a multi-carrier modulation mode, and the second preset physical layer frame structure comprises a multi-carrier synchronous head, a multi-carrier physical layer head and a second effective load for loading the data to be transmitted; the multi-carrier synchronous head in the multi-carrier modulation mode stores a short training sequence and a long training sequence, and the multi-carrier physical layer head stores a bandwidth, a frame length, a multi-carrier modulation mode, a second preset modulation order and a second preset coding mode, and the data length of a second effective load;
the data framing processing module is used for carrying out framing processing on the modulated data to be transmitted after Fourier transformation;
and the data second sending module is used for sending the data to be transmitted after framing processing to an access node.
8. A computer-readable storage medium storing computer instructions for causing the computer to perform the carrier modulation based wireless communication method of any one of claims 1 to 5.
9. A communication terminal, comprising: a memory and a processor communicatively coupled to each other, the memory having stored therein computer instructions that, when executed, perform the carrier modulation based wireless communication method of any of claims 1-5.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883238A (en) * | 2015-03-31 | 2015-09-02 | 重庆邮电大学 | Multi-carrier time division multiplexing modulation/demodulation method and system |
| CN105049388A (en) * | 2015-07-05 | 2015-11-11 | 新华通讯社 | Short-wave communication system based on fountain codes and single carrier frequency domain equalization and transmission method thereof |
| CN111327399A (en) * | 2020-02-14 | 2020-06-23 | 中国电力科学研究院有限公司 | Method and system for sending and receiving control information of communication physical frame |
| JP2020174247A (en) * | 2019-04-09 | 2020-10-22 | 矢崎総業株式会社 | Communication control device and communication control method |
| CN113141195A (en) * | 2021-04-06 | 2021-07-20 | 重庆邮电大学 | Demodulation method for dispreading in direct sequence spread spectrum system and storage medium |
-
2022
- 2022-03-17 CN CN202210266915.1A patent/CN114826856B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883238A (en) * | 2015-03-31 | 2015-09-02 | 重庆邮电大学 | Multi-carrier time division multiplexing modulation/demodulation method and system |
| CN105049388A (en) * | 2015-07-05 | 2015-11-11 | 新华通讯社 | Short-wave communication system based on fountain codes and single carrier frequency domain equalization and transmission method thereof |
| JP2020174247A (en) * | 2019-04-09 | 2020-10-22 | 矢崎総業株式会社 | Communication control device and communication control method |
| CN111327399A (en) * | 2020-02-14 | 2020-06-23 | 中国电力科学研究院有限公司 | Method and system for sending and receiving control information of communication physical frame |
| CN113141195A (en) * | 2021-04-06 | 2021-07-20 | 重庆邮电大学 | Demodulation method for dispreading in direct sequence spread spectrum system and storage medium |
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