Dual-mode communication method and system based on HPLC and HRF

Abstract

The invention relates to the field of dual-mode communication, in particular to a dual-mode communication method and system based on HPLC and HRF, and the method comprises the steps: S1, employing an upper and lower two-line communication transmission channel; s2, a physical layer adopts an OFDM (Orthogonal Frequency Division Multiplexing) fusion model for simplifying the fusion complexity of the physical layer; s3, the MAC layer adopts a link scheduling and switching technology and is used for obtaining link and network information from the physical layer; s4, the network layer adopts a dynamic routing technology for collecting latest routing information and selecting an optimal channel as a network route; and S5, the application layer adopts a comprehensive application protocol and is used for realizing service message interaction between the units. The method has the advantages that the application of the traditional networking communication technology can be deepened, and the diversity and flexibility of networking communication are improved.

Description

[Technical field]

[0001] The present invention relates to the field of dual-mode communication, and in particular to a dual-mode communication method and system based on HPLC and HRF. [Background technology]

[0002] High-speed power line carrier (HPLC) is a broadband power line carrier technology for data transmission on low-voltage power lines. The existing power line carrier communication network uses power lines as a communication medium to realize the aggregation, transmission, and interaction of power consumption information of low-voltage power users. Compared with traditional low-speed narrowband power line carrier technology, HPLC technology has the characteristics of large bandwidth and high transmission rate, which can meet the higher requirements of low-voltage power line carrier communication. High-speed wireless communication (HRF) uses wireless channels as the communication medium, which is not affected by various non-ideal factors of power lines, heavy loads and strong noise interference of the power grid, etc.

[0003] The communication transmission mode is gradually transformed from a single HPLC communication mode to a fusion communication mode to transmit data. The dual-mode communication mode of wired and wireless hybrid networking that combines HPLC communication technology with high-speed wireless communication technology is used to comprehensively realize dual-mode communication of hybrid technology from aspects such as networking topology, fusion technology, and functional application. This not only deepens the application of traditional networking communication technology, but also improves the diversity and flexibility of networking communication. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a dual-mode communication method and system based on HPLC and HRF, which can not only deepen the application of traditional networking communication technology, but also improve the diversity and flexibility of networking communication.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A dual-mode communication method based on HPLC and HRF, comprising the following steps: S1: using an up-and-down double-row communication transmission channel;

[0007] S2: The physical layer adopts the OFDM orthogonal frequency division multiplexing fusion model to simplify the complexity of physical layer fusion;

[0008] S3: The MAC layer uses link scheduling and switching technology to obtain link and network information from the physical layer;

[0009] S4: The network layer uses dynamic routing technology to collect the latest routing information and select the optimal channel as the network route;

[0010] S5: The application layer uses a comprehensive application protocol to implement business message interaction between units.

[0011] Preferably, S2 is specifically that the physical layer includes a transmitting end and a receiving end, the physical layer encodes and modulates the baseband signal to generate a modulated signal, and the modulated signal passes through the fused communication channel at the same time.

[0012] Preferably, the fused communication channel includes a wireless communication channel and a power carrier communication channel, the modulated signal is amplified by a power amplifier and then transmitted through the power carrier communication channel, and the modulated signal is frequency-converted to the wireless communication channel for wireless transmission.

[0013] Preferably, the modulated signal is first converted into an analog intermediate frequency signal by a digital-to-analog converter at the transmitting end in a wireless communication channel, and then converted into a digital signal by an analog-to-digital converter at the receiving end.

[0014] Preferably, in the power carrier communication channel, the modulated signal is first amplified by a power amplifier at the transmitting end and then restored by demodulation at the receiving end.

[0015] Preferably, S3 specifically comprises that the MAC layer implements link creation, coordination and maintenance through a scheduling technology for multi-access link docking.

[0016] Preferably, S4 is specifically that the network layer calculates the path length through a distributed real-time routing algorithm.

[0017] Preferably, S5 specifically comprises that the application layer adopts a comprehensive application protocol platform to establish and maintain communication transmission.

[0018] A dual-mode communication method and system based on HPLC and HRF, including an OFDM orthogonal frequency division multiplexing fusion module, for simplifying the complexity of physical layer fusion;

[0019] Link scheduling and switching module, used to obtain link and network information from the physical layer;

[0020] Dynamic routing technology module, used to collect the latest routing information and select the best channel as the network route;

[0021] Comprehensive application protocol module, used to realize business message interaction between units.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1.HPLC and wireless communication technologies are unified through external modules to achieve communication integration. Both carrier and wireless meet the requirements of the four-layer protocol, namely the physical layer, MAC layer, network layer and application layer. Communication technology needs to be integrated between layers. When the channel quality of a certain layer is poor, each layer can be integrated at any time. The physical layer uses the channel fusion method. PLC uses power lines as the medium, and wireless communication transmits signals through electromagnetic waves. The physical layers of these two communication methods include signal coupling, analog front end, modulation and demodulation, etc.

[0024] However, due to the large difference in signal frequencies, it is difficult to achieve deep integration of HPLC and wireless communication directly at the physical layer. Integration at the physical layer can effectively reduce the complexity of MAC processing and improve communication efficiency, thereby simplifying the complexity of dual-mode communication system equipment.

[0025] The modulation method of HPLC and wireless communication uses OFDM orthogonal frequency division multiplexing technology to make the differences in the transmitting and receiving circuits consistent, enable deep integration, simplify the complexity of physical layer integration, and improve the stability of signal transmission.

[0026] 2. The communication transmission mode is gradually transformed from a single HPLC communication mode to a fusion communication mode to transmit data. The dual-mode communication mode of wired and wireless hybrid networking that combines HPLC communication technology with high-speed wireless communication technology is used to comprehensively realize dual-mode communication of hybrid technology from aspects such as networking topology, fusion technology, and functional application. This not only deepens the application of traditional networking communication technology, but also improves the diversity and flexibility of networking communication.

[0027] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] Figure 1 This is a flow chart of Embodiment 1 of the present invention. [Specific implementation method]

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The following first describes the concepts involved in this application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of this application easier to understand and does not limit the scope of protection of this application.

[0032] Embodiment 1:

[0033] A dual-mode communication method based on HPLC and HRF, such as Figure 1 As shown, the following steps are included: S1: using an up and down double-row communication transmission channel;

[0034] S2: The physical layer adopts the OFDM orthogonal frequency division multiplexing fusion model to simplify the complexity of physical layer fusion;

[0035] S3: The MAC layer uses link scheduling and switching technology to obtain link and network information from the physical layer;

[0036] S4: The network layer uses dynamic routing technology to collect the latest routing information and select the optimal channel as the network route;

[0037] S5: The application layer uses a comprehensive application protocol to implement business message interaction between units.

[0038] HPLC and wireless communication technologies are unified through external modules to achieve communication integration. Both carrier and wireless meet the requirements of the four-layer protocol, namely the physical layer, MAC layer, network layer and application layer. Communication technology needs to be integrated between each layer. When the channel quality of a certain layer is poor, each layer can be integrated at any time. The physical layer uses the channel fusion method. PLC uses power lines as the medium, and wireless communication transmits signals through electromagnetic waves. The physical layers of these two communication methods include signal coupling, analog front end, modulation and demodulation, etc.

[0039] However, due to the large difference in signal frequencies, it is difficult to achieve deep integration of HPLC and wireless communication directly at the physical layer. Integration at the physical layer can effectively reduce the complexity of MAC processing and improve communication efficiency, thereby simplifying the complexity of dual-mode communication system equipment.

[0040] The modulation method of HPLC and wireless communication uses OFDM orthogonal frequency division multiplexing technology to make the differences in the transmitting and receiving circuits consistent, enable deep integration, simplify the complexity of physical layer integration, and improve the stability of signal transmission.

[0041] S2 is specifically, the physical layer includes a transmitting end and a receiving end, the physical layer encodes and modulates the baseband signal to generate a modulated signal, and the modulated signal passes through the fusion communication channel at the same time.

[0042] The integrated communication channel includes a wireless communication channel and a power carrier communication channel. The modulated signal is amplified by a power amplifier and then transmitted through the power carrier communication channel. The modulated signal is frequency-converted to the wireless communication channel and then wirelessly transmitted.

[0043] In the wireless communication channel, the modulated signal is first converted into an analog intermediate frequency signal by a digital-to-analog converter at the transmitting end, and then converted into a digital signal by an analog-to-digital converter at the receiving end.

[0044] In the power carrier communication channel, the modulated signal is first amplified by a power amplifier at the transmitting end and then restored by demodulation at the receiving end.

[0045] In terms of fusion method, this patent adopts the OFDM orthogonal frequency division multiplexing fusion model, treating wireless communication and power carrier communication as two independent paths.

[0046] At the transmitting end, the physical layer modulator of OFDM is used to generate the modulation signal. The baseband signal is encoded and modulated to generate the required modulation signal. The digital-to-analog converter converts the digital signal into an analog intermediate frequency signal, which is then divided into two paths. One path first uses a power amplifier to amplify the signal and then transmits it through the power carrier channel. The other path first up-converts the signal to the frequency band of wireless communication and then transmits it through the wireless channel. Two identical OFDM signals are transmitted simultaneously on the wireless channel and the power carrier channel.

[0047] At the receiving end, the wireless signal is down-converted to an intermediate frequency and converted to a digital signal through an analog-to-digital converter, while the power carrier signal is converted to a digital signal after amplification. After the OFDM digital demodulator completes the demodulation of the signal, it restores the signal to the original signal.

[0048] Specifically, S3 is that the MAC layer implements link creation, coordination, and maintenance through scheduling technology for multi-access link docking.

[0049] The MAC layer uses link scheduling and switching technology. The module first obtains link and network information from the physical layer, and selects the appropriate link for the specific data service. The scheduling technology of interface docking is applied in the multi-access link to realize the allocation and reservation of resources in complex scenarios, and the creation, coordination and maintenance of links. By selecting the most optimized MAC frame data frame in the multi-access link, the signal quality of the selected link is guaranteed to be the best. The resource status of the wireless side can be perceived and responded in real time, and dynamic diversion and switching control can be performed. The switching coordination, adjustment, dynamic resource management and other technologies are used for joint optimization to improve network performance.

[0050] Specifically, S4 is that the network layer calculates the path length through a distributed real-time routing algorithm.

[0051] The data set for statistically calculating the distance difference between the communication distance and the publishing distance is A={a1, a2, ...ai}, where a1, a2, ...ai represent the i data records in the data set respectively.

[0052] The first random initial routing point is generated, represented by K1 = {K11, K21, ... Kj1}, where Kj represents the jth routing point and Kj1 represents the point where Kj is located for the first time. After the routing point is generated, traverse from a1, a2 to ai and calculate their distances to K11, K21, ..., Kj1 respectively. Determine which distance ai has the closest to Kj1 and divide ai into the cluster centered on Kj1. Calculate the first SSE, as shown in formula (Q1), which is the sum of the squares of the distances between ai and its own routing point Kj1:

[0053]

[0054] Where SSE1 represents the first SSE, m represents the variable representing the number of routing points during programming, which takes integer values ​​from 1 to j, am1 represents all the data belonging to the mth routing point after the first routing point is determined, Km1 represents the mth routing point determined for the first time, and am1∈Km1 represents that am1 is divided into a cluster centered on Km1. Calculate the mean of the points in each cluster and use it as the new routing point K2: K2={K21,K22,……,K2j};

[0055] K2j=mean(am1)

[0056] mean() represents the mean function, which can be used to determine the second routing point K2, and redistribute the data to the new cluster according to the principle of the shortest distance. Calculate the second SSE, that is, SSE2:

[0057]

[0058] S5 is specifically that the application layer uses a comprehensive application protocol platform to establish and maintain communication transmission. The network layer uses dynamic routing technology, which can use a distributed real-time routing algorithm to calculate the path length and deploy link probes to observe the signal strength at each point in the channel, thereby inferring the signal quality of the end-to-end path. After collecting the latest routing information, the routing algorithm recalculates and selects the optimal channel as the network route. The data processing algorithm adjustment formula is: A(t) = A1×(1+βt). Among them, A(t) is the data processing algorithm at time t, A1 is the initial algorithm, and β is the adjustment coefficient.

[0059] Similarly, wireless communication is more flexible than the carrier mode, with a dedicated control channel to monitor the quality of the data channel in real time. RSSI received signal strength indication technology is used to select the optimal channel and perform routing selection. A dedicated conversion module is deployed in the terminal to wake up the current channel operation with a communication driver.

[0060] The application layer uses a comprehensive application protocol platform to achieve deep integration of communication networks and business message interaction between communication units. The network layer provides a data communication interface to connect with the application platform, calculates the server resources required for optimal information transmission based on actual information capacity analysis, and uses a variety of big data analysis algorithms to determine how to call the application interfaces of different programs.

[0061] The communication transmission mode is gradually transformed from a single HPLC communication mode to a fusion communication mode to transmit data. The dual-mode communication mode of wired and wireless hybrid networking that combines HPLC communication technology with high-speed wireless communication technology is used to comprehensively realize dual-mode communication of hybrid technology from aspects such as networking topology, fusion technology, and functional application. This not only deepens the application of traditional networking communication technology, but also improves the diversity and flexibility of networking communication.

[0062] A dual-mode communication method and system based on HPLC and HRF, including an OFDM orthogonal frequency division multiplexing fusion module, for simplifying the complexity of physical layer fusion;

[0063] Link scheduling and switching module, used to obtain link and network information from the physical layer;

[0064] Dynamic routing technology module, used to collect the latest routing information and select the best channel as the network route;

[0065] Comprehensive application protocol module, used to realize business message interaction between units.

[0066] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

[0067] Those of ordinary skill in the art will appreciate that the units (or modules, steps, etc., the same below) of the examples described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0068] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored, etc.

[0069] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-0nly Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc., which can store program code.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A dual-mode communication method based on HPLC and HRF, characterized in that: The following steps are involved: S1: adopts up and down double-line communication transmission channel; S2: The physical layer adopts the OFDM orthogonal frequency division multiplexing fusion model to simplify the complexity of physical layer fusion; S3: The MAC layer uses link scheduling and switching technology to obtain link and network information from the physical layer; S4: The network layer uses dynamic routing technology to collect the latest routing information and select the optimal channel as the network route; S5: The application layer uses a comprehensive application protocol to implement business message interaction between units.

2. A dual-mode communication method based on HPLC and HRF as claimed in claim 1, characterized in that: S2 is specifically that the physical layer includes a transmitting end and a receiving end, and the physical layer encodes and modulates the baseband signal to generate a modulated signal, and the modulated signal passes through the fusion communication channel at the same time.

3. A dual-mode communication method based on HPLC and HRF as claimed in claim 2, characterized in that: The fused communication channel includes a wireless communication channel and a power carrier communication channel. The modulated signal is amplified by a power amplifier and then transmitted through the power carrier communication channel. The modulated signal is frequency-converted to the wireless communication channel and then wirelessly transmitted.

4. A dual-mode communication method based on HPLC and HRF as claimed in claim 3, characterized in that: In the wireless communication channel, the modulated signal is first converted into an analog intermediate frequency signal by a digital-to-analog converter at the transmitting end, and then converted into a digital signal by an analog-to-digital converter at the receiving end.

5. A dual-mode communication method based on HPLC and HRF as claimed in claim 3, characterized in that: In the power carrier communication channel, the modulated signal is first amplified by a power amplifier at the transmitting end, and then restored by demodulation at the receiving end.

6. A dual-mode communication method based on HPLC and HRF as claimed in claim 1, characterized in that: S3 specifically means that the MAC layer implements link creation, coordination and maintenance through a scheduling technology for multi-access link docking.

7. A dual-mode communication method based on HPLC and HRF as claimed in claim 1, characterized in that: S4 specifically includes that the network layer calculates the path length through a distributed real-time routing algorithm.

8. A dual-mode communication method based on HPLC and HRF as claimed in claim 1, characterized in that: S5 specifically refers to that the application layer uses a comprehensive application protocol platform to establish and maintain communication transmission.

9. A dual-mode communication system based on HPLC and HRF, characterized in that: Includes OFDM orthogonal frequency division multiplexing fusion module to simplify the complexity of physical layer fusion; Link scheduling and switching module, used to obtain link and network information from the physical layer; Dynamic routing technology module, used to collect the latest routing information and select the best channel as the network route; Comprehensive application protocol module, used to realize business message interaction between units.

Images