A method and system for wide and narrow band adaptive networking and access control in multi-domain cooperation

Abstract

The application discloses a kind of wide and narrow band adaptive networking and access control method and system of multi-domain combination, method includes being equipped with unique identity mark, unique identity mark is mapped into access parameter, access parameter is verified, according to the data processing of check result;Select physical layer transmission mode transmission access parameter, and design feature sequence in the preamble structure of physical layer transmission mode, detect preamble structure, and switch corresponding receiving mode to demodulate;Periodically evaluate the transmission channel quality of physical layer transmission mode, set different channel switching threshold according to different service level, and dynamically adjust switching hysteresis parameter according to historical switching frequency, realize the adaptive collaborative access of wide and narrow band network.The application has the advantages of very low signaling overhead, short access delay, high security, strong dynamic adaptability, etc., and is suitable for Internet of Things, high dynamic, weak connection and bandwidth limited scenes.

Description

Technical Field

[0001] This invention relates to the field of joint operations network information technology, specifically to a multi-domain joint broadband and narrowband adaptive networking and access control method and system. Background Technology

[0002] With the advent of the Internet of Things era, wireless communication networks face multi-dimensional performance challenges, including coverage, connection density, transmission rate, and power consumption. Coastal defense tactical communication networks, as a collection of interconnected wired and wireless channels, routing and switching nodes, computer hardware, and software, are characterized by limited bandwidth resources, diverse node mobility and user mobility, and high requirements for resilience and security. Wideband and narrowband converged networks, due to their combination of the long-range, low-power advantages of narrowband and the high-speed, high-capacity advantages of broadband, have become a research hotspot in the field of ad hoc networks.

[0003] In current mainstream wireless communication and IoT systems, device network access generally adopts a process that separates random access and identity authentication. It is necessary to first complete synchronization and time-frequency resource acquisition, and then complete identity authentication through independent signaling interaction. The physical layer mode switching of broadband and narrowband converged nodes depends on explicit signaling commands issued by the base station, and the network side uniformly schedules the terminal to change the mode. Broadband and narrowband coordination mechanisms are mostly triggered by channel interference, and the network-wide unified migration is achieved by broadcasting frequency switching commands on the narrowband channel. In terms of narrowband multi-user access, traditional solutions rely on spreading factors to distinguish users, while emerging technologies use a non-orthogonal transmission mechanism of telegraph segmentation to improve access capacity.

[0004] However, the separation of access and authentication processes leads to high signaling overhead and high latency in continuous authentication. Physical layer mode switching relies on explicit signaling, resulting in slow response and easy loss of synchronization. The broadband and narrowband coordination mechanism lacks business awareness and dynamic threshold adjustment capabilities, causing unnecessary network-wide switching. Narrowband multi-user concurrent access is either limited in capacity or has excessively high processing complexity at the receiving end. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a multi-domain joint broadband and narrowband adaptive networking and access control method and system, which aims to solve the problems of high authentication latency, slow response, and lack of dynamic adjustment capability in current device network access.

[0006] To achieve the above objectives, this invention proposes a multi-domain joint broadband and narrowband adaptive networking and access control method, the method comprising: Equipped with a unique identifier, the unique identifier is mapped to access parameters using a mapping function, the access parameters are verified, and data processing is performed based on the verification results; Based on its own business needs and channel awareness results, the physical layer transmission mode is selected to transmit access parameters, and a feature sequence is designed in the preamble structure of the physical layer transmission mode. The preamble structure is detected, and the corresponding receiving mode is switched for demodulation. The transmission channel quality of the physical layer transmission mode is periodically evaluated, differentiated channel handover thresholds are set according to different service levels, and handover hysteresis parameters are dynamically adjusted according to historical handover frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

[0007] According to one aspect of the above technical solution, the steps of equipping a unique identifier, mapping the unique identifier to access parameters using a mapping function, verifying the access parameters, and processing data based on the verification result include: The device is equipped with a unique identifier, and the unique identifier is mapped to time-domain access parameters, frequency-domain access parameters, and code-domain access parameters using a mapping function. The time-domain access parameters include a dedicated time slot index or a pseudo-random backoff sequence, the frequency-domain access parameters include a narrowband subchannel index or a broadband resource block location, and the code-domain access parameters are device-specific cyclic shift spread spectrum codewords. The mapping relationship between the unique identifier and access parameters is pre-stored in the device and the base station.

[0008] According to one aspect of the above technical solution, after storing the mapping relationship, the device transmits the access parameters when sending uplink data; If the current time period is a polling period, the access parameters are sent based on the time slot to which the current device belongs, and the spreading code is used for modulation on the specified sub-channel; If the current time period is a contention period, carrier sensing is performed based on the backoff sequence to determine if the channel is in an idle state, and then access parameter transmission is performed.

[0009] According to one aspect of the above technical solution, time-frequency synchronization, channel estimation and equalization are performed on the received access parameters, and time slot monitoring is conducted to detect multi-dimensional parameters of active devices. Extract the time slot index, sub-channel index, and codeword index from the transmission parameters, construct triples, compare them according to the pre-stored mapping relationship, calculate the matching degree, if the matching degree meets the standard, receive data, if the matching degree does not meet the standard, drop packets.

[0010] According to one aspect of the above technical solution, the steps of selecting the physical layer transmission mode transmission access parameters based on its own service needs and channel awareness results, designing a feature sequence in the preamble structure of the physical layer transmission mode, detecting the preamble structure, and switching the corresponding receiving mode for demodulation include: The physical layer transmission modes include FSK narrowband mode, S-FSK spread spectrum mode, and OFDM wideband mode. The cross-correlation peak value between the preamble sequences of different modes is more than 20dB lower than the autocorrelation peak value, supporting time-domain overlapping transmission. The physical layer transmission mode is selected according to channel quality, service type, power status, and distance estimation. Based on the physical layer transmission mode, three parallel matched filters are configured synchronously. When any output exceeds the preset detection threshold, the corresponding mode is locked according to the earliest effective peak value principle, the output of the remaining links is frozen synchronously, and the corresponding demodulation parameters are configured to complete signal reception.

[0011] According to one aspect of the above technical solution, the steps of periodically evaluating the transmission channel quality of the physical layer transmission mode, setting differentiated channel handover thresholds according to different service levels, and dynamically adjusting the handover hysteresis parameters according to historical handover frequencies to achieve adaptive cooperative access of broadband and narrowband networks include: The service is rated and the transmission channel quality of the physical layer transmission mode is periodically evaluated to obtain the handover threshold and recovery threshold for different levels of service. The channel quality of the narrowband and wideband channels is compared with the service handover threshold, and channel migration is performed based on the comparison results. When channel migration is triggered, a switching instruction carrying a service level mask is broadcast through the backup channel to perform the switching. The switching instruction includes the switching direction, target channel parameters and effective time. Channel switching is performed on the devices corresponding to the mask level, while other service levels continue to be transmitted through the original channel.

[0012] According to one aspect of the above technical solution, the step of dynamically adjusting the handover hysteresis parameter based on the historical handover frequency is as follows: An exponentially weighted moving average algorithm is used to smooth historical handover frequencies. When the smoothed handover frequency exceeds a preset upper limit, the handover hysteresis window for the corresponding service level is adjusted, the difference between the recovery threshold and the handover threshold is increased, and the criteria for determining channel recovery are improved.

[0013] This invention also provides a multi-domain joint broadband and narrowband adaptive networking and access control system, which is used in the above-mentioned multi-domain joint broadband and narrowband adaptive networking and access control method. The system includes: The parameter mapping module is used to equip a unique identifier, use a mapping function to map the unique identifier to access parameters, verify the access parameters, and perform data processing based on the verification results. The transmission selection module is used to select the physical layer transmission mode transmission access parameters based on its own service requirements and channel awareness results, and to design a feature sequence in the preamble structure of the physical layer transmission mode, detect the preamble structure, and switch the corresponding receiving mode for demodulation. The channel switching module is used to periodically evaluate the transmission channel quality of the physical layer transmission mode, set differentiated channel switching thresholds according to different service levels, and dynamically adjust the switching hysteresis parameters according to historical switching frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

[0014] The present invention also proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the multi-domain joint broadband and narrowband adaptive networking and access control method described above.

[0015] The present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the multi-domain joint broadband and narrowband adaptive networking and access control method as described above.

[0016] In summary, the multi-domain joint broadband and narrowband adaptive networking and access control method provided by this invention maps the identity sequence of each legitimate device to three-dimensional access parameters in the time, frequency, and code domains. Devices naturally carry this binding relationship when sending data, and the base station synchronously completes identity verification during demodulation and decoding, achieving authentication upon access and eliminating the need for independent authentication signaling. The receiving end uses a parallel matched filter bank to simultaneously monitor preambles for multiple physical layer modes such as FSK, S-FSK, and OFDM, achieving zero-signaling mode switching. For broadband and narrowband collaboration, a service-aware selective switching mechanism is proposed, setting independent switching thresholds for different service levels. Services of that level are migrated only when the channel quality falls below the corresponding threshold, and targeted instructions are broadcast through a backup channel. The asymmetric configuration of narrowband uplink and broadband downlink improves IoT uplink coverage. Simultaneously, S-FSK code domain multiple access is used, binding the spreading code to the identity, supporting high-concurrency, low-power transmission. This invention has advantages such as extremely low signaling overhead, short access latency, high security, and strong dynamic adaptability, making it suitable for scenarios such as IoT, drone swarms, and emergency communications.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a flowchart of the multi-domain joint broadband and narrowband adaptive networking and access control method in Embodiment 1 of the present invention; Figure 2This is a flowchart of the multi-domain joint broadband and narrowband adaptive networking and access control method in Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the structure of the multi-domain joint broadband and narrowband adaptive networking and access control system in Embodiment 5 of the present invention; Figure 4 This is a structural block diagram of the electronic device in Embodiment 7 of the present invention. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Example 1 like Figure 1 The diagram shows a flowchart of a multi-domain joint broadband and narrowband adaptive networking and access control method according to Embodiment 1 of the present invention. The multi-domain joint broadband and narrowband adaptive networking and access control method includes the following steps S11-S13, wherein: S11. Equip a unique identifier, use a mapping function to map the unique identifier to access parameters, verify the access parameters, and process the data based on the verification result.

[0023] Each legitimate device is equipped with a unique identifier (ID) which is used to generate access parameters in the time domain, frequency domain, and code domain through a deterministic mapping function. These parameters are naturally carried by the device when transmitting data; the base station simultaneously verifies these multi-dimensional parameters during the receiving, demodulating, and decoding process. If a match is found, the device is considered to have legitimate access, eliminating the need for independent authentication signaling exchange.

[0024] S12. Based on its own business needs and channel awareness results, the system selects the physical layer transmission mode to transmit access parameters, designs a feature sequence in the preamble structure of the physical layer transmission mode, detects the preamble structure, and switches the corresponding receiving mode for demodulation.

[0025] Based on its own service requirements or channel awareness results, the equipment autonomously selects the most suitable physical layer mode (FSK, S-FSK, or OFDM) to send data packets, and designs the characteristic sequence corresponding to the physical layer transmission mode in the preamble. The receiver continuously runs a parallel matched filter bank, simultaneously detecting multiple preamble modes. Once any valid preamble is detected, it automatically switches to the corresponding mode for demodulation.

[0026] S13. Periodically evaluate the transmission channel quality of the physical layer transmission mode, set differentiated channel handover thresholds according to different service levels, and dynamically adjust the handover hysteresis parameters according to historical handover frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

[0027] Base stations periodically evaluate the transmission quality of narrowband and wideband channels. Transmission quality is usually determined by signal-to-noise ratio, packet reception success rate, and interference level. Based on the above determining factors, a comprehensive quality index for narrowband and wideband channels is calculated.

[0028] Different channel handover thresholds are set according to different service levels, and independent handover and recovery thresholds are set for different service levels. When the channel quality is lower than the handover threshold of the corresponding service level, only the broadband and narrowband channels of that service level are triggered, and the handover hysteresis parameters are dynamically adjusted according to the historical handover frequency to achieve adaptive coordination between broadband and narrowband networks.

[0029] In summary, the multi-domain joint broadband and narrowband adaptive networking and access control method provided by this invention maps the identity sequence of each legitimate device to three-dimensional access parameters in the time, frequency, and code domains. Devices naturally carry this binding relationship when sending data, and the base station synchronously completes identity verification during demodulation and decoding, achieving authentication upon access and eliminating the need for independent authentication signaling. The receiving end uses a parallel matched filter bank to simultaneously monitor preambles for multiple physical layer modes such as FSK, S-FSK, and OFDM, achieving zero-signaling mode switching. For broadband and narrowband collaboration, a service-aware selective switching mechanism is proposed, setting independent switching thresholds for different service levels. Services of that level are migrated only when the channel quality falls below the corresponding threshold, and targeted instructions are broadcast through a backup channel. The asymmetric configuration of narrowband uplink and broadband downlink improves IoT uplink coverage. Simultaneously, S-FSK code domain multiple access is used, binding the spreading code to the identity, supporting high-concurrency, low-power transmission. This invention has advantages such as extremely low signaling overhead, short access latency, high security, and strong dynamic adaptability, making it suitable for scenarios such as IoT, drone swarms, and emergency communications.

[0030] Example 2 Please see Figure 2 The figure shows a multi-domain joint broadband and narrowband adaptive networking and access control method in the second embodiment of the present invention, including steps S21-S25.

[0031] S21. Equip a unique identifier, use a mapping function to map the unique identifier to access parameters, verify the access parameters, and process the data based on the verification result.

[0032] S211, Identity Sequence Generation and Pre-configuration.

[0033] Each device is assigned a pseudo-random identity sequence by the network center when it leaves the factory or registers with the network. This is a unique identifier, with a length L = 128 ~ 256 bits. This sequence can be generated from a device's permanent identifier (such as IEEE EUI-64) via a key derivation function (KDF), or it can be dynamically distributed by the network. Due to the sufficient randomness and uniqueness of the sequence, the probability of collisions is negligible.

[0034] S212. Unique identity mapping and generation of access parameters.

[0035] Define mapping function ,in: For time-domain parameter space, For the frequency domain parameter space, For the code field parameter space, specifically: The time-domain process is as follows: For polling mode, the identity sequence Input a linear feedback shift register (LFSR) or a hash function to produce a Integers within the range , which serves as the device's dedicated time slot index during the superframe polling period.

[0036] For the contention access mode, Mapped to a pseudo-random backoff sequence Used for backoff counting in CSMA / CA.

[0037] The frequency domain mapping process is as follows: Will Before truncation Bits, mapped to subchannel indices in the narrowband channel pool (For example It supports 256 sub-channels.

[0038] If the device also supports broadband transmission, then Another portion of the bits is used to determine the location of the initial broadband resource block (RB).

[0039] The code field mapping process is as follows: In S-FSK mode, each device is assigned a unique cyclic shift codeword. ,in It is a length of The base sequence (such as ZC sequence or m sequence). Depend on low Determined by bits. Specifically, taking... low Bits, calculate the cyclic displacement , for the base sequence Perform a circular shift operation Generate device-specific spread spectrum codewords.

[0040] The codeword set satisfies quasi-orthogonality: for Normalized cross-correlation ,in Depending on the code length The exponential decreases, meaning the normalized cross-correlation value of codewords from any two different devices does not exceed [a certain value]. ,and Depending on the code length The index declined.

[0041] The mapping relationship between unique identifiers and access parameters is pre-stored in the device and base station.

[0042] S213, Equipment uplink transmission and base station access authentication.

[0043] When the device sends data, it automatically configures the transmission link according to the mapped 3D parameters, without needing to send additional authentication requests. It listens to the base station broadcast to complete superframe synchronization and determines whether the current time period is a polling period or a contention period. If it is a polling period, the device only transmits data in its own time slot. Send, and in the specified sub-channel Use spreading code Modulation is performed, and during the contention period, the device performs carrier sensing according to the backoff sequence, and the binding codeword is also used when transmitting.

[0044] The base station performs time-frequency synchronization, channel estimation, and equalization on the received signals. In each time slot, it performs code-domain matched filtering on each possible sub-channel and detects the presence of active users.

[0045] For the detected user equipment, extract the time slot index it uses. Sub-channel index and codeword index According to the time slot index Sub-channel index and codeword index Construct triples The matching score is calculated by comparing the result with the pre-stored mapping relationship between unique identifiers and access parameters.

[0046] in, , , The preset weights can be adjusted according to the security policy.

[0047] If the score matches , If the matching score fails to meet the threshold, the detected user device is determined to be a legitimate device, data is received directly, and a context is established / updated. If the matching score fails to meet the threshold, the data packet is discarded and no rejection signaling is sent, preventing the illegitimate device from obtaining any feedback information and increasing the difficulty of the attack.

[0048] It should be noted that this identity binding relationship is implicitly carried in every data transmission, eliminating the need for the base station to maintain complex session states. If an attacker forges only a single dimension (e.g., guessing a time slot for transmission), there is a high probability that the data will not match in other dimensions (sub-channel, spreading code), thus being discarded. This multi-domain joint verification effectively defends against replay attacks, spoofed access, and man-in-the-middle attacks.

[0049] Compared to traditional separate authentication, this eliminates 4-6 independent signaling interactions, including authentication requests, challenges, responses, and confirmations, reducing network access signaling by over 80%. Simulations show that under moderate load, the end-to-end latency from the initial data transmission to correct data reception can be reduced to 40% of traditional solutions. Multidimensional binding requires attackers to simultaneously crack the mapping relationships across three dimensions; a brute-force attack has a complexity of O(2L / 2) (birthday attack bound), making it practically infeasible.

[0050] S22. Based on its own business needs and channel awareness results, the system selects the physical layer transmission mode to transmit access parameters, designs a feature sequence in the preamble structure of the physical layer transmission mode, detects the preamble structure, and switches the corresponding receiving mode for demodulation.

[0051] The transmitting end autonomously selects the most suitable physical layer mode (FSK, S-FSK, or OFDM) to send data packets based on its own service requirements or channel awareness results, and designs the corresponding feature sequence in the preamble. The receiving end continuously runs a parallel matched filter bank, simultaneously detecting multiple preamble modes. Once any valid preamble is detected, it automatically switches to the corresponding mode for demodulation. The entire process requires no base station broadcast handover command or terminal response, achieving zero-signaling handover.

[0052] As shown in Table 1, the physical layer transmission modes include FSK narrowband mode, S-FSK spread spectrum mode, and OFDM wideband mode. Among them, the cross-correlation peak value between the preamble sequences of different modes is more than 20dB lower than the autocorrelation peak value, supporting time-domain overlapping transmission. The physical layer transmission mode is selected based on channel quality, service type, power status, and distance estimation. Table 1

[0053] The three preamble sequences can completely overlap in time because they have different modulation schemes (FSK is frequency-domain hopping, OFDM is multi-carrier superposition, and S-FSK is spread spectrum). Mutual interference can be suppressed by the processing gain of matched filtering at the receiver. During the design, ensure that the cross-correlation value between the preambles of different modes is low enough (below 20dB of the autocorrelation peak).

[0054] The transmitter does not need to wait for network commands and can autonomously determine the mode based on the following criteria: Channel quality: If the most recently received beacon or ACK signal indicates a high narrowband signal-to-noise ratio but a low wideband signal-to-noise ratio, select FSK or S-FSK mode.

[0055] Service type: Control commands and sensor readings use FSK mode; medium-rate images use S-FSK mode; video streams and files use OFDM mode.

[0056] Battery status: Devices with low battery power should preferentially select the constant envelope FSK / S-FSK mode, which allows the use of high-efficiency Class C power amplifiers (efficiency > 60%).

[0057] Distance estimation: The distance is estimated based on the received signal strength (RSSI). FSK is used for long distances and OFDM is used for short distances.

[0058] The base station synchronously configures three parallel matched filters according to the physical layer transmission mode. When any output exceeds the preset detection threshold, the corresponding mode is locked according to the earliest effective peak value principle, the output of the remaining links is frozen simultaneously, and the corresponding demodulation parameters are configured to complete signal reception.

[0059] This three-way parallel matched filter includes filter A, filter B, and filter C. Filter A, for the FSK preamble, uses a complex correlator or the Goertzel algorithm to output the correlation peak. Filter B, for the S-FSK preamble, employs a matched filter (convolved with the local spreading code), and outputs... Filter C: For the OFDM preamble, frequency domain correlation is used (first FFT, then multiplying with the conjugate of the local ZC sequence, followed by IFFT), output... .

[0060] Each filter continuously calculates the sliding correlation value, and when any output exceeds a preset threshold... Record the arrival time of the peak. To avoid multiple peaks caused by multipath propagation, the earliest effective peak principle is adopted.

[0061] If within the time window If only one filter generates a peak value exceeding the threshold within one symbol period (e.g., 1 symbol period), the mode is directly locked; if two or three filters generate peak values ​​exceeding the threshold simultaneously (rare scenario, such as false triggering under strong interference), the filter is selected according to the preset priority: high reliability services are given priority (which can be predicted by the priority indicator bit carried in the data packet) or the filter is randomly selected and the conflict is recorded.

[0062] Determine the selected mode of data output and immediately configure the receiving link: connect the corresponding demodulator (FSK noncoherent demodulation, S-FSK FFT despreading, OFDM demodulation), set parameters such as sampling rate and filter bandwidth, and freeze the output of the other two filters to prevent the switched data from being processed by the wrong path.

[0063] S23. Periodically evaluate the transmission channel quality of the physical layer transmission mode, set differentiated channel handover thresholds according to different service levels, and dynamically adjust the handover hysteresis parameters according to historical handover frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

[0064] S231, Service Rating and Channel Assessment.

[0065] As shown in Table 2, the business flow is divided into three levels: Table 2

[0066] Base stations and individual nodes periodically evaluate the quality indicators of narrowband and wideband channels. The signal-to-noise ratio (SNR) is calculated using pilots or preambles. Narrowband channels use narrowband SNR estimation (noise bandwidth 12.5kHz), while wideband channels use wideband SNR estimation (noise bandwidth 200kHz). A sliding window is used to calculate the success rate of the most recent data transmissions, i.e., the packet reception success rate. The average received signal strength during idle channel periods is obtained to reflect the background interference intensity.

[0067] S232, Channel switching and dynamic threshold adaptive adjustment.

[0068] For each business level Define independent handover thresholds and recovery threshold (Delay avoids ping-pong).

[0069] For narrowband channels, define narrowband channel quality. (dB).

[0070] For broadband channels, broadband channel quality is defined.

[0071] If the current service uses a narrowband channel, and If so, it will trigger the narrowband to broadband migration (only for this service level).

[0072] If the current service uses a broadband channel, and This triggers a broadband to narrowband migration.

[0073] For example, high-priority services (Very tolerant of low quality, try not to switch) low priority business (Switch off if the channel is slightly poor).

[0074] The base station only issues instructions for the service level that needs to be switched, without affecting the continuous transmission of other services. When the base station decides to migrate a certain service level to another channel, it broadcasts the switching instruction through the backup channel. The instruction format is shown in Table 3. Table 3

[0075] For example, only switch services at level 2: service level mask = 100b (binary), services at levels 0 and 1 remain unchanged.

[0076] To avoid frequent ping-pong handovers caused by fast channel fading, each node independently maintains a threshold adaptive algorithm: Exponentially weighted moving average (EWMA) is used to smooth historical handover frequencies:

[0077] in It is the number of switching times within the nth evaluation period. .

[0078] like Exceeding the target limit (For example, 10 times per hour), then the threshold will be automatically adjusted:

[0079] Increasing the threshold makes handover easier to trigger and reduces repeated migrations caused by channel quality fluctuations. Frequent handovers are caused by overly sensitive threshold settings. Hysteresis should be increased or the lower limit of the handover threshold should be raised. In actual design, the hysteresis window can be adjusted.

[0080] Therefore, it is necessary to adjust the switching hysteresis: increase the difference between the recovery threshold and the switching threshold. Let... ,like ,but .

[0081] In response to the business characteristics of IoT, which primarily involve uplink data, this invention proposes an asymmetric configuration as shown in Table 4: Table 4

[0082] This asymmetric design improves the uplink budget by approximately 12dB (compared to a symmetric 25kHz channel), while the high downlink rate ensures low-latency distribution of control and handover commands.

[0083] In summary, the multi-domain joint broadband and narrowband adaptive networking and access control method provided by this invention maps the identity sequence of each legitimate device to three-dimensional access parameters in the time, frequency, and code domains. Devices naturally carry this binding relationship when sending data, and the base station synchronously completes identity verification during demodulation and decoding, achieving authentication upon access and eliminating the need for independent authentication signaling. The receiving end uses a parallel matched filter bank to simultaneously monitor preambles for multiple physical layer modes such as FSK, S-FSK, and OFDM, achieving zero-signaling mode switching. For broadband and narrowband collaboration, a service-aware selective switching mechanism is proposed, setting independent switching thresholds for different service levels. Services of that level are migrated only when the channel quality falls below the corresponding threshold, and targeted instructions are broadcast through a backup channel. The asymmetric configuration of narrowband uplink and broadband downlink improves IoT uplink coverage. Simultaneously, S-FSK code domain multiple access is used, binding the spreading code to the identity, supporting high-concurrency, low-power transmission. This invention has advantages such as extremely low signaling overhead, short access latency, high security, and strong dynamic adaptability, making it suitable for scenarios such as IoT, drone swarms, and emergency communications.

[0084] Example 3 This embodiment provides a low-complexity S-FSK code domain concurrent access process, which achieves high concurrency and low complexity code domain multiple access through spread spectrum frequency shift keying (S-FSK), and binds codewords to identity to further enhance the access-as-authentication feature.

[0085] S-FSK is a two-dimensional modulation technique where information bits are simultaneously mapped to two dimensions: for subcarrier selection, one is selected from M orthogonal subcarriers to activate, carrying... Bits; cyclically shift the base spread spectrum sequence to carry... Bits; Total bits per symbol: . example Each symbol is 6 bits.

[0086] Its transmitter structure is as follows: the input bit stream is divided into two segments. Used for subcarrier selection, Used for cyclic shift selection; according to Generate a frequency domain sparse vector Only in the index The value at point is 1, and the rest are 0; for the base sequence (length Circular shift get ;Will As a time-domain spread spectrum sequence, for frequency-domain vectors Each element is spread to obtain the transmitted signal:

[0087] In practice, it can be generated efficiently through block repetition and frequency domain filtering.

[0088] Bind the user codebook to the unique identifier of each device, and establish an identity sequence for each device. Uniquely mapped to a circular shifter This means that each device has its own dedicated cyclic shift codeword; when multiple users are in concurrency, different devices can achieve quasi-orthogonal transmission through different subcarriers (frequency division) or the same subcarrier + different cyclic shifts (code division), and the receiving end can be effectively separated.

[0089] Let the received signal be r(t), and the receiving end process: For each subcarrier Down-conversion and matched filtering are performed to obtain the despread symbol. ;Will Composition ;right Perform FFT (if (Powers of 2) or related to local cyclic shift copies, yielding a two-dimensional energy distribution. ; Detection peak position Resume sending bits, and at the same time This identifies the user. Because each user has a unique identifier. The receiving end completes user identification while demodulating the information, further reinforcing the concept of "access equals authentication".

[0090] The spreading factor is dynamically adjusted. It can be dynamically adjusted according to network load: • Low load (<100 nodes): SF=64, to improve data rate; Medium load (100~1000): SF=256, balancing rate and concurrency; • High load (>1000): SF=1024, enhancing anti-interference and concurrency capabilities.

[0091] The adjustment command is sent through the downlink narrowband broadcast channel, and all devices switch over uniformly.

[0092] Example 4 This embodiment provides a hybrid superframe structure to integrate the above mechanisms to achieve hybrid scheduling of contention-free high-priority transmission and random access.

[0093] One superframe cycle Divided into three time periods with dynamic durations:

[0094] Polling time slot allocation steps: Polling period includes Each time slot has a length equal to the data packet transmission time plus a guard interval. The time slot index is bound to the device identity (see Example 2), and the device only sends data in its own time slot without needing to listen.

[0095] The number of activated devices can be dynamically adjusted. The base station broadcasts the current status during designated time periods. The device recalculates its own slot index (modulo mapping).

[0096] Access steps during contention period: Unbound or low-priority devices use the CSMA / CA mechanism during contention periods: Listen to the channel; if it is idle, transmit; if a collision occurs, back off according to the backoff sequence (generated by identity mapping) to avoid repeated collisions; emergency burst data can be preempted using the ALOHA method (without listening before transmission), but the risk of collision must be assumed.

[0097] Superframe dynamic adjustment: The base station dynamically adjusts the proportions of the three time periods based on the current load (polling time period occupancy rate, contention time period collision rate). Adjustment algorithm: If the polling time slot occupancy rate is >80% and the contention time slot collision rate is >20%, then increase the polling time slot percentage (i.e., increase the percentage of polling time slots). ).

[0098] If the polling period occupancy rate is less than 30% and the contention period collision rate is less than 5%, then reduce the proportion of the polling period and increase the contention period to improve channel utilization.

[0099] The adjustment command is issued during the broadcast period of the next superframe.

[0100] Example 5 Another aspect of this invention provides a multi-domain joint broadband and narrowband adaptive networking and access control system; please refer to [link / reference needed]. Figure 3The diagram shown is a schematic representation of the multi-domain joint broadband and narrowband adaptive networking and access control system in Embodiment 5 of the present invention. The multi-domain joint broadband and narrowband adaptive networking and access control system includes: The parameter mapping module 11 is used to equip a unique identifier, use a mapping function to map the unique identifier to access parameters, verify the access parameters, and perform data processing based on the verification result. The transmission selection module 12 is used to select the physical layer transmission mode transmission access parameters based on its own service requirements and channel awareness results, and to design a feature sequence in the preamble structure of the physical layer transmission mode, detect the preamble structure, and switch the corresponding receiving mode for demodulation. The channel switching module 13 is used to periodically evaluate the transmission channel quality of the physical layer transmission mode, set differentiated channel switching thresholds according to different service levels, and dynamically adjust the switching hysteresis parameters according to the historical switching frequency to realize adaptive cooperative access of broadband and narrowband networks.

[0101] Each legitimate device is equipped with a unique identifier (ID) which is used to generate access parameters in the time domain, frequency domain, and code domain through a deterministic mapping function. These parameters are naturally carried by the device when transmitting data; the base station simultaneously verifies these multi-dimensional parameters during the receiving, demodulating, and decoding process. If a match is found, the device is considered to have legitimate access, eliminating the need for independent authentication signaling exchange.

[0102] Based on its own service requirements or channel awareness results, the equipment autonomously selects the most suitable physical layer mode (FSK, S-FSK, or OFDM) to send data packets, and designs the characteristic sequence corresponding to the physical layer transmission mode in the preamble. The receiver continuously runs a parallel matched filter bank, simultaneously detecting multiple preamble modes. Once any valid preamble is detected, it automatically switches to the corresponding mode for demodulation.

[0103] Base stations periodically evaluate the transmission quality of narrowband and wideband channels. Transmission quality is usually determined by signal-to-noise ratio, packet reception success rate, and interference level. Based on the above determining factors, a comprehensive quality index for narrowband and wideband channels is calculated.

[0104] Different channel handover thresholds are set according to different service levels, and independent handover and recovery thresholds are set for different service levels. When the channel quality is lower than the handover threshold of the corresponding service level, only the broadband and narrowband channels of that service level are triggered, and the handover hysteresis parameters are dynamically adjusted according to the historical handover frequency to achieve adaptive coordination between broadband and narrowband networks.

[0105] In summary, the multi-domain joint broadband and narrowband adaptive networking and access control system provided by this invention maps the identity sequence of each legitimate device to three-dimensional access parameters in the time, frequency, and code domains. Devices naturally carry this binding relationship when sending data, and the base station synchronously completes identity verification during demodulation and decoding, achieving authentication upon access and eliminating the need for independent authentication signaling. The receiving end uses a parallel matched filter bank to simultaneously monitor preambles for multiple physical layer modes such as FSK, S-FSK, and OFDM, achieving zero-signaling mode switching. For broadband and narrowband collaboration, a service-aware selective switching mechanism is proposed, setting independent switching thresholds for different service levels. Services of that level are migrated only when the channel quality falls below the corresponding threshold, and targeted instructions are broadcast through a backup channel. The asymmetric configuration of narrowband uplink and broadband downlink improves uplink coverage for the Internet of Things (IoT). Simultaneously, S-FSK code domain multiple access is used, binding the spreading code to the identity, supporting high-concurrency, low-power transmission. This invention has advantages such as extremely low signaling overhead, short access latency, high security, and strong dynamic adaptability, making it suitable for scenarios such as the Internet of Things, drone swarms, and emergency communications.

[0106] Example 6 In another aspect, the present invention also proposes a computer-readable storage medium having stored thereon one or more computer programs that, when executed by a processor, implement the above-described multi-domain joint broadband and narrowband adaptive networking and access control method.

[0107] Those skilled in the art will understand that the logic or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable storage medium" can mean any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0108] More specific examples (a non-exhaustive list) of computer-readable storage media include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable storage media can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0109] Example 7 Figure 4 This is a structural block diagram of an electronic device provided in Embodiment 4. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the multi-domain joint broadband and narrowband adaptive networking and access control method described in the above embodiments. Figure 4 The electronic device 30 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0110] like Figure 4 As shown, the electronic device 30 can be manifested as a general-purpose computing device, such as a server device. The components of the electronic device 30 may include, but are not limited to: at least one processor 31, at least one memory 32, and a bus 33 connecting different system components (including memory 32 and processor 31).

[0111] Bus 33 includes a data bus, an address bus, and a control bus.

[0112] The memory 32 may include volatile memory, such as RAM 321 (random access memory), and / or cache memory 322, and may further include ROM 323 (read-only memory).

[0113] The memory 32 may also include a program tool 325 having a set (at least one) of program modules 324, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0114] The processor 31 executes various functional applications and data processing by running computer programs stored in the memory 32, such as the multi-domain joint broadband and narrowband adaptive networking and access control method described above in this invention.

[0115] Electronic device 30 can also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). This communication can be performed via I / O interface 35 (input / output interface). Furthermore, electronic device 30 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) via network adapter 36. Figure 3 As shown, network adapter 36 communicates with other modules of the model-generated electronic device 30 via bus 33. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated electronic device 30, including but not limited to: microcode, device drivers, redundant processors, disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems.

[0116] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0117] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-domain joint broadband and narrowband adaptive networking and access control method, characterized in that, The methods include: Equipped with a unique identifier, the unique identifier is mapped to access parameters using a mapping function, the access parameters are verified, and data processing is performed based on the verification results; Based on its own business needs and channel awareness results, the physical layer transmission mode is selected to transmit access parameters, and a feature sequence is designed in the preamble structure of the physical layer transmission mode. The preamble structure is detected, and the corresponding receiving mode is switched for demodulation. The transmission channel quality of the physical layer transmission mode is periodically evaluated, differentiated channel handover thresholds are set according to different service levels, and handover hysteresis parameters are dynamically adjusted according to historical handover frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

2. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 1, characterized in that, The steps of equipping a unique identifier, mapping the unique identifier to access parameters using a mapping function, verifying the access parameters, and processing the data based on the verification result include: The device is equipped with a unique identifier, and the unique identifier is mapped to time-domain access parameters, frequency-domain access parameters, and code-domain access parameters using a mapping function. The time-domain access parameters include a dedicated time slot index or a pseudo-random backoff sequence, the frequency-domain access parameters include a narrowband subchannel index or a broadband resource block location, and the code-domain access parameters are device-specific cyclic shift spread spectrum codewords. The mapping relationship between the unique identifier and access parameters is pre-stored in the device and the base station.

3. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 2, characterized in that, After storing the mapping relationship, the device will transmit the access parameters when sending uplink data; If the current time period is a polling period, the access parameters are sent based on the time slot to which the current device belongs, and the spreading code is used for modulation on the specified sub-channel; If the current time period is a contention period, carrier sensing is performed based on the backoff sequence to determine if the channel is in an idle state, and then access parameter transmission is performed.

4. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 3, characterized in that, The system performs time-frequency synchronization, channel estimation and equalization on the received access parameters, and timeslot monitoring, as well as multi-dimensional parameter detection on active devices. Extract the time slot index, sub-channel index, and codeword index from the transmission parameters, construct triples, compare them according to the pre-stored mapping relationship, calculate the matching degree, if the matching degree meets the standard, receive data, if the matching degree does not meet the standard, drop packets.

5. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 1, characterized in that, The steps of selecting the physical layer transmission mode and transmitting access parameters based on its own service needs and channel awareness results, designing a feature sequence in the preamble structure of the physical layer transmission mode, detecting the preamble structure, and switching the corresponding receiving mode for demodulation include: The physical layer transmission modes include FSK narrowband mode, S-FSK spread spectrum mode, and OFDM wideband mode. The cross-correlation peak value between the preamble sequences of different modes is more than 20dB lower than the autocorrelation peak value, supporting time-domain overlapping transmission. The physical layer transmission mode is selected according to channel quality, service type, power status, and distance estimation. Based on the physical layer transmission mode, three parallel matched filters are configured synchronously. When any output exceeds the preset detection threshold, the corresponding mode is locked according to the earliest effective peak value principle, the output of the remaining links is frozen synchronously, and the corresponding demodulation parameters are configured to complete signal reception.

6. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 1, characterized in that, The steps for periodically evaluating the transmission channel quality of the physical layer transmission mode, setting differentiated channel handover thresholds according to different service levels, and dynamically adjusting the handover hysteresis parameters based on historical handover frequencies to achieve adaptive cooperative access in broadband and narrowband networks include: The service is rated and the transmission channel quality of the physical layer transmission mode is periodically evaluated to obtain the handover threshold and recovery threshold for different levels of service. The channel quality of the narrowband and wideband channels is compared with the service handover threshold, and channel migration is performed based on the comparison results. When channel migration is triggered, a switching instruction carrying a service level mask is broadcast through the backup channel to perform the switching. The switching instruction includes the switching direction, target channel parameters and effective time. Channel switching is performed on the devices corresponding to the mask level, while other service levels continue to be transmitted through the original channel.

7. The multi-domain joint broadband and narrowband adaptive networking and access control method according to claim 6, characterized in that, The steps for dynamically adjusting the handover hysteresis parameter based on historical handover frequencies are as follows: An exponentially weighted moving average algorithm is used to smooth historical handover frequencies. When the smoothed handover frequency exceeds a preset upper limit, the handover hysteresis window for the corresponding service level is adjusted, the difference between the recovery threshold and the handover threshold is increased, and the criteria for determining channel recovery are improved.

8. A multi-domain joint broadband and narrowband adaptive networking and access control system, characterized in that, The multi-domain joint broadband and narrowband adaptive networking and access control system is used to implement the multi-domain joint broadband and narrowband adaptive networking and access control method according to any one of claims 1-6, wherein the system comprises: The parameter mapping module is used to equip a unique identifier, use a mapping function to map the unique identifier to access parameters, verify the access parameters, and perform data processing based on the verification results. The transmission selection module is used to select the physical layer transmission mode transmission access parameters based on its own service requirements and channel awareness results, and to design a feature sequence in the preamble structure of the physical layer transmission mode, detect the preamble structure, and switch the corresponding receiving mode for demodulation. The channel switching module is used to periodically evaluate the transmission channel quality of the physical layer transmission mode, set differentiated channel switching thresholds according to different service levels, and dynamically adjust the switching hysteresis parameters according to historical switching frequencies to achieve adaptive cooperative access between broadband and narrowband networks.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the multi-domain joint broadband and narrowband adaptive networking and access control method as described in any one of claims 1-7.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the multi-domain joint broadband and narrowband adaptive networking and access control method as described in any one of claims 1-7.

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