Random backoff meter reading optimization method and system based on dual-mode communication

Abstract

The invention discloses a random backoff meter reading optimization method and system based on dual-mode communication. The method comprises the steps that STA monitors the state of an HPLC carrier channel and analyzes an idle period; when a meter reading demand exists and a channel is idle, a random back-off mechanism is started; continuously monitoring the channel during the backoff, initiating carrier communication if the backoff is ended and is still idle, and judging whether a temporary wireless subnet establishment condition is met or not if the channel is occupied; if yes, the STA is switched to a wireless temporary proxy mode and serves as a wireless STA main node to establish a temporary wireless subnet, and data acquisition with the target STA is completed through a wireless channel; after acquisition is completed, the subnet is automatically dismantled, and all STAs access the HPLC main network again. According to the invention, a random back-off and conflict avoidance mechanism is introduced into a carrier link, and when a channel is congested or blocked, a wireless link is switched to carry out direct communication, so that the overall data acquisition efficiency and reliability of the dual-mode communication module in a large-scale networking environment are improved.

Description

Technical Field

[0001] This invention belongs to the field of power information acquisition and communication technology, and relates to the integration technology of power line carrier communication and wireless communication, and in particular to a random backoff meter reading optimization method and system of broadband power line carrier and low-power wireless dual-mode communication module. Background Technology

[0002] High-speed power line communication (HPLC), a communication technology that utilizes existing power lines for data transmission, has been widely used in power distribution information acquisition systems. Its main advantage lies in the fact that it eliminates the need for additional communication lines, allowing for remote meter reading and load management directly based on the power grid infrastructure, significantly reducing deployment costs and complexity. However, the performance of HPLC communication is highly susceptible to the influence of the power grid environment, such as line noise interference, impedance mismatch, and complex and variable topologies. This often leads to unstable communication links, increased bit error rates, and even data loss, severely impacting the reliability and real-time performance of information acquisition.

[0003] To enhance communication reliability, existing technologies are gradually incorporating low-power wireless communication as a supplement, forming a dual-mode communication structure of "carrier as primary and wireless as secondary". The dual-mode module integrates HPLC and a wireless unit, enabling networking at both the physical and data link layers, and achieving message forwarding and bridging at higher layers. When the carrier link is blocked, the module can switch to the wireless link, achieving primary / backup channel switching and redundancy.

[0004] Although existing dual-mode communication technology has improved communication reliability to some extent, it still has many limitations in practical applications, specifically in the following aspects:

[0005] First, most dual-mode modules currently use a single network access mode, meaning they can only access one network (usually an HPLC network) as a slave node (STA) at any given time, and cannot simultaneously maintain the connection between the carrier and the wireless link. This design prevents the full utilization of the potential of dual-mode hardware and limits the flexibility of communication resources.

[0006] Secondly, the HPLC network adopts a centralized management architecture, with a concentrator (CCO) responsible for network setup, scheduling, and data forwarding. Ordinary STA nodes lack the ability to communicate directly point-to-point and cannot initiate communication with other STA nodes directly. All data interaction must be relayed through the CCO, which limits the flexible interaction between modules.

[0007] Third, if a STA node is forcibly switched to CCO mode in order to achieve local data collection, it will conflict with the original main CCO of the station area, which can easily cause network chaos, link interference or even communication blockage, and damage the stability of the entire station area network.

[0008] Fourth, in existing solutions, wireless links are mostly designed as passive backup channels, lacking independent direct communication mechanisms, unable to actively initiate communication and perform concurrent scheduling, making it difficult to support efficient data collection in multi-node concurrent environments and unable to leverage their advantages in complex scenarios.

[0009] Therefore, how to provide a random backoff meter reading optimization method and system that can ensure efficient and stable communication in a dual-mode communication multi-node concurrent environment is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0010] In view of this, the present invention provides a random backoff meter reading optimization method and system based on dual-mode communication, which is applicable to dual-mode communication modules integrating HPLC and low-power wireless. By introducing random backoff and collision avoidance mechanisms in the carrier link and switching to the wireless link for direct communication when the channel is congested or blocked, the overall data acquisition efficiency and reliability of the dual-mode communication module in a large-scale network environment are improved.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] This invention first proposes a random backoff meter reading optimization method based on dual-mode communication. Multiple dual-mode communication modules are connected as STA nodes to the HPLC main network managed by the concentrator CCO, including the following steps:

[0013] S1: The STA node monitors the HPLC carrier channel status and analyzes the available idle time periods of the channel;

[0014] S2: When the STA node with data reading requirements detects that the corresponding HPLC carrier channel is in the available idle period, the STA node introduces a random backoff mechanism.

[0015] S3: During the backoff mechanism execution, the STA node continuously monitors the corresponding HPLC carrier channel status:

[0016] If the corresponding HPLC carrier channel remains idle after the random backoff mechanism ends, then carrier communication is initiated;

[0017] If the HPLC carrier channel is found to be occupied after the random backoff mechanism ends, the right to use the carrier channel is relinquished, and the process proceeds to S4.

[0018] S4: Determine whether the conditions for establishing a temporary wireless subnet are met. If so, trigger the wireless handover strategy: the STA node switches to the wireless temporary agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node, and performs data collection and interaction with the target STA node through the wireless channel.

[0019] S5: After completing local data acquisition through the temporary wireless subnet, the temporary wireless subnet is automatically dismantled, and all STA nodes within the temporary wireless subnet are reconnected to the HPLC main network managed by the concentrator CCO.

[0020] Preferably, step S1 includes the following steps:

[0021] The STA node monitors the HPLC carrier channel status and records the idle or occupied status of the HPLC carrier channel, forming historical channel status data. Based on the historical channel status data, it analyzes and identifies available idle periods.

[0022] Preferably, the random backoff mechanism includes the following steps:

[0023] The STA node randomly generates the backoff duration based on a preset backoff window and starts the backoff timer;

[0024] During the backoff timer, the STA node continuously monitors the status of the corresponding HPLC carrier channel.

[0025] Preferably, when N STA nodes with data reading requirements simultaneously detect that their corresponding HPLC carrier channels are in the available idle period:

[0026] Each of the N STA nodes randomly generates N backoff durations based on an independent preset backoff window; during the backoff timing of the N slave nodes SAT, the N STA nodes continuously monitor the corresponding HPLC carrier channel status, where N > 1;

[0027] If the corresponding HPLC carrier channel remains idle after the backoff timer ends, then carrier communication is initiated;

[0028] If the HPLC carrier channel is found to be occupied after the backoff timer ends, the right to use the carrier channel is relinquished, and the process proceeds to S4.

[0029] Preferably, the step S4 of determining whether the conditions for establishing a temporary wireless subnet are met includes the following steps:

[0030] Determine if the carrier channel access right has been unsuccessfully acquired M times consecutively. If so, trigger the wireless handover strategy, where M > 1.

[0031] Preferably, in step S4, it is determined whether the conditions for establishing a temporary wireless subnet are met. If not, the process waits for the next available idle time period and proceeds to step S3 when the next available idle time period arrives.

[0032] Preferably, in step S4, it is determined whether the conditions for establishing a temporary wireless subnet are met. If not, the system waits for the next available idle time period and actively switches to the temporary wireless agent mode and broadcasts the establishment of the temporary wireless subnet when the next available idle time period arrives.

[0033] Preferably, the STA node with data reading requirements receives external meter reading control commands and forwards them transparently to the target STA node based on the meter communication protocol.

[0034] Preferably, the step of establishing a temporary wireless subnet in S4 includes:

[0035] The target STA node switches to wireless STA slave node accessing the temporary wireless subnet, forming a star topology wireless link;

[0036] The wireless STA master node polls the wireless STA slave nodes and collects data, and the wireless STA slave nodes return responses in turn.

[0037] The present invention further provides a random backoff meter reading optimization system according to the aforementioned random backoff meter reading optimization method based on dual-mode communication, comprising: multiple dual-mode communication modules, each dual-mode communication module being connected as an STA node to the HPLC main network managed by the concentrator CCO;

[0038] The STA node includes:

[0039] The monitoring module is used to monitor the status of the HPLC carrier channel and analyze the available idle periods of the channel.

[0040] The backoff control module is used to introduce a random backoff mechanism when the STA node has a data reading requirement and detects that the corresponding HPLC carrier channel is in an available idle period; the monitoring module continuously monitors the HPLC carrier channel status during the execution of the backoff mechanism.

[0041] The carrier communication module is used to initiate carrier communication after the random backoff mechanism has ended and the channel remains idle;

[0042] The wireless handover module is used to determine whether the conditions for establishing a temporary wireless subnet are met when the channel is detected to be occupied after the random backoff mechanism ends. If the conditions are met, the wireless handover strategy is triggered: the STA node is controlled to switch to the wireless temporary agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node; data collection and interaction are performed with the target STA node through the wireless channel.

[0043] The subnet management module is used to automatically dismantle the temporary wireless subnet after local data acquisition is completed through the temporary wireless subnet, and control all STA nodes within the temporary wireless subnet to reconnect to the HPLC main network.

[0044] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a random backoff meter reading optimization method and system based on dual-mode communication, which has the following beneficial effects:

[0045] 1. Enhanced independent data acquisition capability: By introducing a proxy forwarding and wireless pass-through mechanism in the STA node, the limitation that the STA node can only rely on CCO relay is broken, enabling the module to have point-to-point data acquisition and interaction functions, so that it can complete local data acquisition and interaction without CCO relay.

[0046] 2. Efficient collision avoidance mechanism: By utilizing channel condition monitoring and random backoff algorithm, distributed adaptive scheduling of multiple nodes is achieved, which effectively reduces collisions and retransmissions, improves channel utilization in large-scale node networks, and effectively protects the normal meter reading tasks of CCO.

[0047] 3. Dual-mode complementarity ensures reliability: Through the adaptive switching strategy of "carrier + wireless", when the carrier channel quality is poor or congestion is severe, it can quickly switch to the wireless link, rely on the wireless link to complete data collection, ensure the reliable transmission of critical business data, and significantly improve network robustness and service continuity.

[0048] 4. Modular design for expansion: The optimized dual-mode module supports the large-scale application of power information acquisition systems. It can serve as an edge node in the information acquisition network, with local data processing and autonomous capabilities. Without relying on additional wiring, it can achieve more efficient and reliable power information acquisition and management, which not only reduces the communication pressure between the concentrator and the main station, but also provides support for subsequent access to local intelligent analysis, autonomous control and other extended applications. Attached Figure Description

[0049] 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the carrier network structure of a distribution area under normal mode provided in an embodiment of the present invention;

[0051] Figure 2 A flowchart of the random backoff meter reading optimization method based on dual-mode communication provided in this embodiment of the invention;

[0052] Figure 3 A schematic diagram of the random backoff mechanism provided in an embodiment of the present invention;

[0053] Figure 4 This is a schematic diagram of the network structure when the dual-mode communication module switches to wireless temporary proxy mode according to an embodiment of the present invention;

[0054] Figure 5 This is a flowchart illustrating the workflow of the dual-mode communication module switching to wireless temporary agent mode, as provided in an embodiment of the present invention. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0056] like Figure 1 As shown, in a conventional HPLC network, the concentrator's dual-mode communication module acts as a CCO node, responsible for network setup and scheduling. Other dual-mode communication modules connect to the main HPLC network managed by the concentrator's CCO as STA nodes. All data interactions are forwarded through the CCO node; direct communication between modules is impossible. Because STA nodes cannot communicate directly, the flexibility of local data acquisition is limited. Low-power wireless functionality is typically in a dormant state or serves only as a passive backup, not actively participating in communication.

[0057] like Figure 2 As shown, the first aspect of this invention discloses a random backoff meter reading optimization method based on dual-mode communication, comprising the following steps:

[0058] S1: The STA node monitors the HPLC carrier channel status and analyzes the available idle time periods of the channel.

[0059] In one embodiment, S1 includes the following steps:

[0060] The dual-mode communication module has the ability to monitor the carrier channel in real time, and can distinguish between various states such as channel idle, channel occupied, mode switching, and not connected to the network. The module records the channel status at a fixed period (e.g., 5 seconds) and saves the statistical results locally for a certain period of time (e.g., the last 3 days), and can calculate the available idle time period based on the time segment.

[0061] This function provides data support for subsequent backoff scheduling and wireless handover strategies, preventing modules from blindly competing when the channel is congested and improving channel utilization.

[0062] In this embodiment, the step of calculating the "available idle time period" based on the time segment includes:

[0063] By comparing historical data, recurring, continuous periods of idle time throughout the day are identified. These identified regular idle periods are marked as "available idle periods," serving as the optimal timing for the dual-mode communication module to perform random backoff or switch wireless communication.

[0064] S2: When the STA node with data reading requirements detects that the corresponding HPLC carrier channel is in an available idle period, the STA node introduces a random backoff mechanism. To solve the problem of collisions caused by multiple nodes competing for the channel simultaneously in the same idle period, a random backoff mechanism is introduced in the dual-mode communication module.

[0065] In one embodiment, the random backoff mechanism includes the following steps:

[0066] The STA node randomly generates the backoff duration based on a preset backoff window and starts the backoff timer;

[0067] During the backoff timer, the STA node continuously monitors the status of the corresponding HPLC carrier channel.

[0068] In one embodiment, when N STA nodes with data reading requirements simultaneously detect that their corresponding HPLC carrier channels are in an available idle period:

[0069] Each of the N STA nodes randomly generates N backoff durations (i.e., backoff time slots) based on an independent preset backoff window, and each starts its own backoff timer.

[0070] During the backoff timer, N STA nodes continuously monitor the corresponding HPLC carrier channel status, where N > 1.

[0071] S3: During the backoff mechanism execution, the STA node continuously monitors the corresponding HPLC carrier channel status:

[0072] If the corresponding HPLC carrier channel remains idle after the random backoff mechanism ends, then carrier communication is initiated;

[0073] If, after the random backoff mechanism ends, it is detected that the HPLC carrier channel is occupied by another node, then the right to use the carrier channel is relinquished, the current competition is terminated, and the node waits for the next idle period. Figure 3 As shown.

[0074] This mechanism requires no centralized coordination. Modules can independently complete peak-shifting communication without centralized coordination, achieving distributed adaptive scheduling within the distribution area, reducing the probability of collisions, improving overall throughput efficiency, and increasing channel utilization and communication success rate.

[0075] In one embodiment, when N STA nodes with data reading requirements simultaneously detect that their corresponding HPLC carrier channels are in an available idle period:

[0076] Each of the N STA nodes randomly generates N backoff durations based on an independent preset backoff window; during the backoff timing of the N slave nodes SAT, the N STA nodes continuously monitor the corresponding HPLC carrier channel status, where N > 1;

[0077] If the corresponding HPLC carrier channel remains idle after the backoff timer ends, then carrier communication is initiated;

[0078] If the HPLC carrier channel is found to be occupied after the backoff timer ends, the right to use the carrier channel is relinquished, and the process proceeds to S4.

[0079] S4: Determine if the conditions for establishing a temporary wireless subnet are met. If so, trigger the wireless handover strategy: the STA node switches to the temporary wireless agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node, and performs data collection and interaction with the target STA node through the wireless channel.

[0080] In one embodiment, S4, considering that in some high-density networks, carrier channel idle periods are scarce or even completely occupied, determining whether the conditions for establishing a temporary wireless subnet are met includes the following steps:

[0081] Determine if the carrier channel access right has been unsuccessfully acquired M times consecutively. If so, trigger the wireless handover strategy, where M > 1.

[0082] In one embodiment, in step S4, it is determined whether the conditions for establishing a temporary wireless subnet are met. If not, the process waits for the next available idle period and proceeds to step S3 when the next available idle period arrives.

[0083] In one embodiment, step S4 determines whether the conditions for establishing a temporary wireless subnet are met. If not, it waits for the next available idle time slot and actively switches to the temporary wireless agent mode and broadcasts the establishment of the temporary wireless subnet when the next available idle time slot arrives. This ensures that the activation of the wireless channel is aligned with the time slot of the carrier channel, avoiding conflicts between wireless operations and the tasks of the carrier network CCO.

[0084] With firmware upgrades, the module can be equipped with a "temporary wireless proxy" function, enabling the wireless interface only when necessary to minimize interference with existing carrier networks.

[0085] In one embodiment, under the premise that the carrier channel is idle and the STA node has been connected to the network, the dual-mode communication module that enters the temporary agent mode receives external meter reading control commands and forwards them to the target STA node through transparent transmission based on the meter communication protocol, and interacts with the target node through the carrier or wireless channel.

[0086] The meter communication protocol supports protocols such as DL / T645 and DL / T698.

[0087] In one embodiment, the step of establishing a temporary wireless subnet in S4 includes:

[0088] The target STA node switches to a wireless STA slave node and accesses the temporary wireless subnet, forming a star topology wireless link, such as... Figure 4 As shown, the metering box data acquisition node acts as the wireless STA master node, and the user node acts as the wireless STA slave node.

[0089] The wireless STA master node polls the wireless STA slave nodes and collects data, and the wireless STA slave nodes return responses in turn.

[0090] S5: After completing local data acquisition via the temporary wireless subnet, the temporary wireless subnet is automatically dismantled, and all STA nodes within the temporary wireless subnet reconnect to the HPLC main network managed by the concentrator CCO. This enables the STA nodes to have short-term proxy capabilities, thereby expanding their functional scope without permanently disrupting the network topology.

[0091] like Figure 5 As shown, the timing process of the dual-mode communication module when switching to wireless mode is as follows:

[0092] S1–S2: The STA nodes of the original HPLC main network are temporarily de-networked to release HPLC main network resources;

[0093] S3–S4: The dual-mode communication module of the STA node initiates wireless network establishment as the wireless STA master node, and the wireless communication modules of other target STA nodes connect in sequence as wireless STA slave nodes to form a temporary wireless subnet.

[0094] S5–S6: The wireless STA master node polls to collect data, and the wireless STA slave nodes return responses in sequence;

[0095] S7–S8: After the task is completed, the temporary wireless subnet is automatically removed, and all wireless communication modules are restored to the STA state of the HPLC main network and reconnected to the HPLC main network managed by the CCO.

[0096] The second aspect of the present invention also discloses a random backoff meter reading optimization system based on a random backoff meter reading optimization method according to the first aspect of the present invention, comprising: multiple dual-mode communication modules, each dual-mode communication module being connected as an STA node to the HPLC main network managed by the concentrator CCO;

[0097] STA nodes include:

[0098] The monitoring module is used to monitor the status of the HPLC carrier channel and analyze the available idle periods of the channel.

[0099] The backoff control module is used to introduce a random backoff mechanism when the STA node has a data reading requirement and detects that the corresponding HPLC carrier channel is in an available idle period; the monitoring module continuously monitors the HPLC carrier channel status during the execution of the backoff mechanism.

[0100] The carrier communication module is used to initiate carrier communication after the random backoff mechanism has ended and the channel remains idle;

[0101] The wireless handover module is used to determine whether the conditions for establishing a temporary wireless subnet are met when the channel is detected to be occupied after the random backoff mechanism ends. If the conditions are met, the wireless handover strategy is triggered: the STA node is controlled to switch to the wireless temporary agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node; data collection and interaction are performed with the target STA node through the wireless channel.

[0102] The subnet management module is used to automatically dismantle the temporary wireless subnet after local data acquisition is completed through the temporary wireless subnet, and control all STA nodes within the temporary wireless subnet to reconnect to the HPLC main network.

[0103] The second aspect of the present invention is used to perform all the steps of the random backoff meter reading optimization method based on dual-mode communication provided in the first aspect of the present invention.

[0104] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0105] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A random backoff meter reading optimization method based on dual-mode communication, wherein multiple dual-mode communication modules are connected as STA nodes to the HPLC main network managed by the concentrator CCO, characterized in that, Includes the following steps: S1: The STA node monitors the HPLC carrier channel status and analyzes the available idle time periods of the channel; S2: When the STA node with data reading requirements detects that the corresponding HPLC carrier channel is in the available idle period, the STA node introduces a random backoff mechanism. S3: During the backoff mechanism execution, the STA node continuously monitors the corresponding HPLC carrier channel status: If the corresponding HPLC carrier channel remains idle after the random backoff mechanism ends, then carrier communication is initiated; If the HPLC carrier channel is found to be occupied after the random backoff mechanism ends, the right to use the carrier channel is relinquished, and the process proceeds to S4. S4: Determine whether the conditions for establishing a temporary wireless subnet are met. If so, trigger the wireless handover strategy: the STA node switches to the wireless temporary agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node, and performs data collection and interaction with the target STA node through the wireless channel. S5: After completing local data acquisition through the temporary wireless subnet, the temporary wireless subnet is automatically dismantled, and all STA nodes within the temporary wireless subnet are reconnected to the HPLC main network managed by the concentrator CCO.

2. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, S1 includes the following steps: The STA node monitors the HPLC carrier channel status and records the idle or occupied status of the HPLC carrier channel, forming historical channel status data. Based on the historical channel status data, it analyzes and identifies available idle periods.

3. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, The random backoff mechanism includes the following steps: The STA node randomly generates the backoff duration based on a preset backoff window and starts the backoff timer; During the backoff timer, the STA node continuously monitors the status of the corresponding HPLC carrier channel.

4. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 3, characterized in that, When N STA nodes with data reading requirements simultaneously detect that their corresponding HPLC carrier channels are in the available idle period: Each of the N STA nodes randomly generates N backoff durations based on an independent preset backoff window; During the backoff time of the N slave nodes SAT, the N STA nodes continuously monitor the corresponding HPLC carrier channel status, where N > 1; If the corresponding HPLC carrier channel remains idle after the backoff timer ends, then carrier communication is initiated; If the HPLC carrier channel is found to be occupied after the backoff timer ends, the right to use the carrier channel is relinquished, and the process proceeds to S4.

5. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, The step S4, which determines whether the conditions for establishing a temporary wireless subnet are met, includes the following steps: Determine if the carrier channel access right has been unsuccessfully acquired M times consecutively. If so, trigger the wireless handover strategy, where M > 1.

6. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, In step S4, it is determined whether the conditions for establishing a temporary wireless subnet are met. If not, the process waits for the next available idle time period and proceeds to step S3 when the next available idle time period arrives.

7. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, In step S4, it is determined whether the conditions for establishing a temporary wireless subnet are met. If not, it waits for the next available idle time period and actively switches to the temporary wireless agent mode and broadcasts the establishment of a temporary wireless subnet when the next available idle time period arrives.

8. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, STA nodes with data reading requirements receive external meter reading control commands and forward them transparently to the target STA nodes based on the meter communication protocol.

9. The method for optimizing random backoff meter reading based on dual-mode communication according to claim 1, characterized in that, The steps for establishing a temporary wireless subnet in S4 include: The target STA node switches to wireless STA slave node accessing the temporary wireless subnet, forming a star topology wireless link; The wireless STA master node polls the wireless STA slave nodes and collects data, and the wireless STA slave nodes return responses in turn.

10. A random backoff meter reading optimization system based on a dual-mode communication-based random backoff meter reading optimization method according to any one of claims 1-9, characterized in that, include: Multiple dual-mode communication modules, each of which acts as an STA node and connects to the HPLC main network managed by the concentrator CCO; The STA node includes: The monitoring module is used to monitor the status of the HPLC carrier channel and analyze the available idle periods of the channel. The backoff control module is used to introduce a random backoff mechanism when the STA node has a data reading requirement and detects that the corresponding HPLC carrier channel is in an available idle period; the monitoring module continuously monitors the HPLC carrier channel status during the execution of the backoff mechanism. The carrier communication module is used to initiate carrier communication after the random backoff mechanism has ended and the channel remains idle; The wireless handover module is used to determine whether the conditions for establishing a temporary wireless subnet are met when the channel is detected to be occupied after the random backoff mechanism ends. If the conditions are met, the wireless handover strategy is triggered: the STA node is controlled to switch to the wireless temporary agent mode and broadcasts the establishment of a temporary wireless subnet as the wireless STA master node; data collection and interaction are performed with the target STA node through the wireless channel. The subnet management module is used to automatically dismantle the temporary wireless subnet after local data acquisition is completed through the temporary wireless subnet, and control all STA nodes within the temporary wireless subnet to reconnect to the HPLC main network.

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