Method for using different modulation modes in data fields of the same frame

Abstract

The application provides a method for data fields of the same frame adopting different modulation modes, relates to the technical field of communication technology, and comprises the following steps: copying original data fields of the same frame into two parts; determining specific modulation modes of segment one data and segment two data respectively; marking the modulation modes of the segment one data and the segment two data in the data fields of the pilot signal, and simultaneously outputting the start and end positions of the segment one data and the start and end positions of the segment two data; transmitting the marked pilot signal according to the lowest modulation mode, transmitting the segment one data according to the specific modulation mode of the segment one data through a transmitter and demodulating simultaneously, transmitting the segment two data according to the specific modulation mode of the segment two data, sequentially demodulating the two segments, and finally obtaining data. The application provides an innovative communication method, and aims to improve the reliability of data transmission, and is especially suitable for complex and changeable channel environments.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication technology, in particular, especially relates to a method for using different modulation methods in data fields of the same frame. BACKGROUND

[0002] In modern communication technology, modulation technology is the key to achieving efficient and reliable data transmission. With the growing demand for communication, the performance requirements of modulation technology are also increasing. Traditional modulation technologies, such as frequency shift keying (FSK), phase shift keying (PSK) and quadrature amplitude modulation (QAM), although to some extent meet the needs of data transmission, but in the face of complex and changeable communication environment, still exposed some limitations.

[0003] In wireless communication, signals will be affected by factors such as multipath effect, fading, noise and interference, resulting in signal distortion and increased error rate. For example, in urban environments, the shielding and reflection of buildings can cause signal multipath propagation, and signals from different paths will interfere with each other when they reach the receiving end, affecting the accuracy of signal demodulation. In satellite communication, due to the long distance of signal transmission, large path loss, and the influence of the ionosphere, the stability and reliability of the signal are facing severe challenges.

[0004] The existing modulation technology has deficiencies in data transmission stability and anti-error packet loss. On the one hand, when the channel condition is poor, a single modulation method is difficult to adapt to different signal-to-noise ratio environments, which can easily lead to data transmission errors or loss. For example, in low signal-to-noise ratio conditions, high-order modulation methods (such as 1024-QAM) can provide higher data transmission rates, but have lower tolerance to noise and interference, and the error rate will increase significantly; while low-order modulation methods (such as BPSK) have strong anti-interference ability, but the data transmission rate is low, which cannot meet the demand of high-speed data transmission. On the other hand, in some application scenarios with high real-time requirements, such as video conferencing, online gaming, etc., data loss or delay will seriously affect user experience. SUMMARY

[0005] According to the technical problems mentioned in the above background technology, a method for using different modulation methods in data fields of the same frame is provided. The present application can dynamically adjust the modulation method according to the channel condition, ensure the stability of data transmission, improve the data transmission rate, effectively reduce the error packet loss phenomenon, and meet the requirements of different application scenarios for communication quality.

[0006] The technical means adopted by the present application are as follows:

[0007] A method for using different modulation methods in data fields of the same frame, comprising the following steps:

[0008] Step 1, copy the original same frame data field into two parts; one part is segment one data and the other part is segment two data;

[0009] Step 2, according to the signal to noise ratio data of the current channel measurement result, high order modulation is carried out on the segment one data to determine the specific modulation mode of the segment one data;

[0010] Step 3, low order modulation is carried out on the segment two data to determine the specific modulation mode of the segment two data;

[0011] Step 4, the modulation mode determined in the step 2 and the step 3 is broadcasted to the receiving end in the pilot signal; in the data field of the pilot signal, the modulation mode of the segment one data and the segment two data is marked, and the start and end positions of the segment one data and the start and end positions of the segment two data are outputted;

[0012] Step 5, the marked pilot signal is sent according to the lowest modulation mode, the segment one data is sent according to the specific modulation mode of the segment one data through the transmitter, and the segment two data is sent according to the specific modulation mode of the segment two data;

[0013] Step 6, the receiving end demodulates the pilot signal to obtain the modulation mode of the segment one data and the segment two data, the start and end positions of the segment one data and the start and end positions of the segment two data;

[0014] Step 7, the segment one data is demodulated, if the segment one data is correctly received, the segment one data is immediately reported to the application layer, and an ack is reported at the same time; if the segment one data is not correctly received, the segment two data is demodulated, if the segment two data is correctly received, the segment two data is immediately reported to the application layer, and an ack is reported at the same time; if the segment two data is not successfully received, the step 1 is returned.

[0015] Further, in the step 3, the low order modulation method of the segment two data is any one of the following two ways:

[0016] A, the lowest order modulation is adopted for the segment two data;

[0017] B, on the basis of the specific modulation mode of the segment one data, the specific modulation mode of the segment one data is down modulated by N modulation modes.

[0018] Further, the standard of the correct reception is that the bit error rate is 0.

[0019] Further, in the step 1, the two copied parts are two data segments with the same content, that is, the segment one data and the segment two data have the same content.

[0020] Furthermore, the specific modulation scheme of the segment 1 data is any one of 4096QAM, 1024QAM, 256QAM, 64QAM, and QPSK.

[0021] Furthermore, the specific modulation scheme of the second segment data is any one of 1024QAM, 256QAM, 64QAM, QPSK, and BPSK.

[0022] Furthermore, the pilot signal includes, in sequence: a power measurement field, a channel estimation field, and a data segment information field.

[0023] Furthermore, the flag is a bit flag added to the bit position of the pilot signal.

[0024] Furthermore, the receiving end includes an analog-to-digital conversion module.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] This invention proposes an innovative communication method aimed at improving the reliability of data transmission, particularly suitable for complex and variable channel environments. Its core idea is to cleverly embed two identical, backup-like sets of data within a single transmission frame. Through careful design of the modulation scheme, such as employing a modulation scheme with strong anti-interference capabilities, and combining it with advanced channel coding techniques, it ensures that the receiver can effectively recover the original data even under adverse channel conditions. This method not only significantly improves the robustness and reliability of data transmission in complex electromagnetic environments and avoids the additional delays caused by traditional Automatic Repeat Request (ARQ) mechanisms, but also offers a simpler hardware implementation, reducing the requirements for device processing power and thus saving hardware costs. Simultaneously, by reducing the number of retransmissions, it greatly improves the real-time performance and overall efficiency of data transmission, achieving a perfect balance between high reliability, low cost, and high timeliness. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall process of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] like Figure 1 As shown, the present invention provides a method for using different modulation schemes for data fields in the same frame, comprising the following steps:

[0032] Step 1: Copy the data fields of the same frame into two copies; one copy is segment one data and the other copy is segment two data; in this preferred embodiment, the two copies are two data segments with the same content, that is, the content of segment one data and segment two data is exactly the same.

[0033] Step 2: Perform high-order modulation on the segment 1 data based on the signal-to-noise ratio (SNR) data from the current channel measurement results to determine the specific modulation scheme of the segment 1 data. In this application, the modulation scheme is determined based on the average SNR of the subcarriers and the SNR threshold range of different modulations. As a preferred embodiment of this application, the specific modulation scheme of the segment 1 data is any one of 4096QAM, 1024QAM, 256QAM, 64QAM, and QPSK.

[0034] Step 3: Perform low-order modulation on the segment two data to determine the specific modulation scheme of the segment two data; in this application, the specific modulation scheme of the segment two data is any one of 1024QAM, 256QAM, 64QAM, QPSK, and BPSK. In step 3, the low-order modulation method for the segment two data is any one of the following two methods:

[0035] A. Use the lowest order modulation for the data in segment two;

[0036] B. Based on the specific modulation method of segment one data, adjust the specific modulation method of segment one data down by N modulation systems.

[0037] In a preferred embodiment, in this application, the modulation order in Wi-Fi decreases sequentially from MCS11 to MCS0, i.e., from 1024QAM to BPSK. A higher modulation order is called high modulation, and vice versa. The N value can be set in advance based on the actual packet loss rate test results. For example, if reducing the MCS by 2 will eliminate packet loss, then N=2. Alternatively, a difference relative to the average SNR can be set based on the lowest SNR of the subcarrier measured by the channel. For example, if the difference between the lowest and average SNR is 5dB, and the current high modulation is reduced by 2 levels, the demodulation threshold will decrease by 6dB, then N=2 can be set. Alternatively, the modulation order can be manually reduced by a certain number, lowering the modulation to the lowest level of BPSK.

[0038] Step 4: Broadcast the modulation schemes determined in Step 2 and Step 3 to the receiving end in the pilot signal; in the data field of the pilot signal, mark the modulation schemes of the first segment data and the second segment data, and output the start and end positions of the first segment data and the second segment data.

[0039] In this application, the pilot signal includes, in sequence, a power measurement field, a channel estimation field, and a data segment information field.

[0040] Preferably, in this application, the marker is added to the bit positions of the pilot signal. A corresponding bit marker is added to the pilot field bit positions, for example, adding 20 bits. The first 4 bits represent the modulation scheme of high-modulation segment 1, the next 4 bits represent the modulation scheme of low-modulation segment 2, the next 6 bits represent the start and end positions of segment 1, and the last 6 bits represent the start and end positions of segment 2. This only describes the function; no restrictions are placed on the bit width or the order of the bits.

[0041] Step 5: Send the pilot signal after the mark according to the lowest modulation mode, send the segment 1 data according to the specific modulation mode of segment 1 data through the transmitter, and send the segment 2 data according to the specific modulation mode of segment 2.

[0042] Step 6: The receiving end demodulates the pilot signal to obtain the modulation scheme of the segment one data and the segment two data, the start and end positions of the segment one data and the start and end positions of the segment two data;

[0043] Step 7: Demodulate the data in segment 1. If segment 1 data is received correctly (bit error rate is 0), immediately report segment 1 data to the application layer and simultaneously report ack. If segment 1 data is not received correctly (bit error rate is not 0), demodulate the data in segment 2. If segment 2 data is received correctly (bit error rate is 0), immediately report segment 2 data to the application layer and simultaneously report ack. If segment 2 data is not received successfully (bit error rate is not 0), return to step 1.

[0044] To ensure data transmission stability and reduce errors and packet loss, assuming the data to be sent is A, data A is first modulated according to the modulation scheme in step 2, generating modulated data B in step 5. Then, data A is modulated according to the low modulation scheme in step 3 to generate data C. Both B and C carry data A. The data is then arranged with high-modulation data first, followed by low-modulation data, and so on. That is, the overall data, in terms of time structure, is as follows: [pilot, high-modulation data B (carrying A), low-modulation data C (carrying A)].

[0045] After the transmitter sends the combined data, the receiver receives the data and demodulates it in chronological order. The first data to be demodulated is B. If B is received correctly, then the correct A has been obtained, and C is discarded. If the demodulation is incorrect, then C needs to be demodulated again to obtain the correct A.

[0046] A bit error rate of 0 indicates correct reception; any bit errors indicate incorrect reception. This data is then reported to the application layer. Since this data A is likely important, the chip processes it with the highest priority and shortest latency (immediate processing). Discarding the data means discarding it without demodulation. The demodulation method is the same for different modulation schemes; all follow the standard procedure.

[0047] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. In the above embodiments of the present invention, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. It should be understood that the disclosed technical content in the several embodiments provided in this application can be implemented in other ways.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for using different modulation methods for data fields of the same frame, characterized in that, The method comprises the following steps: Step 1, copying the original same frame data field into two parts, one part is segment one data and the other part is segment two data; Step 2, according to the signal-to-noise ratio data of the current channel measurement result, the segment one data is high-order modulated to determine the specific modulation mode of the segment one data; Step 3, the segment two data is low-order modulated to determine the specific modulation mode of the segment two data; the low-order modulation method of the segment two data is any one of the following two ways: A, the segment two data is modulated by the lowest order; B, on the basis of the specific modulation mode of the segment one data, the specific modulation mode of the segment one data is adjusted downward by N modulation modes; Step 4, the modulation modes determined in steps 2 and 3 are broadcasted to the receiving end in the pilot signal; in the data field of the pilot signal, the modulation modes of the segment one data and the segment two data are marked, and the start and end positions of the segment one data and the start and end positions of the segment two data are outputted; Step 5, the marked pilot signal is transmitted according to the lowest modulation mode, the segment one data is transmitted by the transmitter according to the specific modulation mode of the segment one data, and the segment two data is transmitted according to the specific modulation mode of the segment two data; Step 6, the receiving end demodulates the pilot signal to obtain the modulation modes of the segment one data and the segment two data, the start and end positions of the segment one data and the start and end positions of the segment two data; Step 7, the segment one data is demodulated, if the segment one data is correctly received, the segment one data is immediately reported to the application layer, and an ack is reported at the same time; if the segment one data is not correctly received, the segment two data is demodulated, if the segment two data is correctly received, the segment two data is immediately reported to the application layer, and an ack is reported at the same time; if the segment two data is not successfully received, the step 1 is returned.

2. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The standard for correct reception is that the bit error rate is 0.

3. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. In step 1, the two copied parts are two data segments with the same content, i.e., the segment one data and the segment two data have the same content.

4. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The specific modulation mode of the segment one data is any one of 4096QAM, 1024QAM, 256QAM, 64QAM and QPSK.

5. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The specific modulation mode of the segment two data is any one of 1024QAM, 256QAM, 64QAM, QPSK and BPSK.

6. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The pilot signal comprises the following sequentially ordered fields: a power measurement field, a channel estimation field and a data segment information field.

7. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The marking is adding a bit mark in the bit position of the pilot signal.

8. The method of claim 1, wherein different modulation schemes are used for different data fields in the same frame. The receiving end comprises an analog-to-digital conversion module.

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