A terminal network access method and a target terminal

Abstract

The application discloses a terminal network access method and device, relates to the field of communication, and is applied to a method of a target terminal, which comprises the following steps: receiving a broadcast signal transmitted by at least one network node in a target network; the target network is a wireless mesh network formed by a plurality of communication terminals as network nodes; the communication terminal is a movable terminal or a fixed terminal; selecting a network access node for the target terminal from the at least one network node according to the broadcast signal; and controlling the target terminal to directly connect to the network access node, so that the target terminal accesses the target network as a network node.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a terminal network access method and apparatus. Background Technology

[0002] Currently, low-altitude flying vehicles such as drones or aircraft rely on cloud platforms or private networks for relay in order to access wireless mesh networks.

[0003] Therefore, low-altitude flight vehicles suffer from high network access delays. Summary of the Invention

[0004] In view of the above problems, this application provides a terminal network access method and apparatus to reduce the network access latency of communication terminals. The specific solution is as follows:

[0005] The first aspect of this application provides a terminal network access method, applied to a target terminal, the method comprising:

[0006] Receive broadcast signals transmitted by at least one network node in the target network;

[0007] The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminal is a mobile terminal or a fixed terminal.

[0008] Based on the broadcast signal, select a network access node for the target terminal from the at least one network node;

[0009] The target terminal is controlled to directly connect to the network access node, so that the target terminal is connected to the target network as a network node.

[0010] In one possible implementation, after controlling the target terminal to directly connect to the network access node, the method further includes:

[0011] Receive spatial status information sent by the network access node;

[0012] Based on the spatial state information, perform the corresponding processing operations;

[0013] The spatial state information represents the spatial state of the space where the network access node is located; the spatial state information is obtained by the network access node through its deployed integrated sensing components.

[0014] In one possible implementation, the spatial state information includes one or more of the following: airspace state information, meteorological disaster early warning information, and movement guidance instructions;

[0015] The airspace status information includes airspace congestion information or airspace vacancy information in the space where the network access node is located; the meteorological disaster early warning information includes wind shear information or icing information; the movement guidance instructions include altitude adjustment instructions or turning suggestion instructions.

[0016] The integrated sensing component includes: a communication radio frequency unit deployed in the network node and at least one sensor.

[0017] In one possible implementation, the method further includes:

[0018] Obtain the terminal status information of the target terminal; the terminal status information represents the movement status of the target terminal in its spatial location;

[0019] Send the terminal status information to the network access node;

[0020] The terminal status information includes one or more of the following: the location information of the target terminal, the speed information of the target terminal, the movement intention information, and the device status information; the movement intention information includes the heading information and / or target point information of the target terminal; the device status information includes the battery information and / or fault code information of the target terminal.

[0021] In one possible implementation, selecting a network access node for the target terminal from the at least one network node based on the broadcast signal includes:

[0022] Obtain the signal strength information of the broadcast signal;

[0023] Based at least on the signal strength information, a network access node is selected for the target terminal from at least one network node.

[0024] In one possible implementation, selecting an access node for the target terminal from the at least one network node, based at least on the signal strength information, includes:

[0025] The network nodes to which the signal strength information belongs are sorted in descending order of signal strength information;

[0026] If there is only one network node ranked first, select the network node ranked first as the access node;

[0027] If there are multiple network nodes that rank first in the network hierarchy, the network node with the highest network level will be selected as the access node.

[0028] In this context, at least some network nodes in the target network act as direct gateways directly connected to servers in the target network; at least some network nodes in the target network act as chain gateways connected to servers through the direct gateways; and at least some network nodes in the target network act as chain gateways connected to servers through other chain gateways and the direct gateways. The network hierarchy represents the number of nodes that separate the network nodes from the servers.

[0029] In one possible implementation, controlling the target terminal to directly connect to the network access node includes:

[0030] The target terminal is controlled to send a network access request to the network access node, and the network access request is used to execute the network access process between the target terminal and the network access node.

[0031] The network access process includes:

[0032] The target terminal and the network access node are time-aligned.

[0033] The target terminal receives the authentication result provided by the network access node;

[0034] The target terminal receives a network access role provided by the network access node; the network access role represents the network layer of the target terminal in the target network.

[0035] The target terminal receives the time slot resources allocated by the network access node.

[0036] In one possible implementation, the target terminal communicates with the network access node via a first physical layer communication link;

[0037] The method further includes, after controlling the target terminal to directly connect to the network access node:

[0038] Monitor the communication parameters between the target terminal and the network access node; the communication parameters characterize the link quality of the first physical layer communication link;

[0039] When the communication parameters meet the link switching conditions, the target terminal is controlled to switch to the second physical layer communication link to communicate with the network access node;

[0040] The operating frequency band of the first physical layer communication link is different from that of the second physical layer communication link.

[0041] In one possible implementation, the communication parameters include at least one of the following: received signal strength indication, signal-to-noise ratio, packet loss rate, and communication delay;

[0042] The switching conditions include at least one of the following:

[0043] The received signal strength indication of the first physical layer communication link is less than or equal to a first threshold;

[0044] The packet loss rate of the first physical layer communication link is greater than or equal to the second threshold.

[0045] The communication delay of the first physical layer communication link is greater than or equal to the third threshold;

[0046] The signal-to-noise ratio of the first physical layer communication link is less than or equal to the signal-to-noise ratio of the second physical layer communication link.

[0047] In one possible implementation, after controlling the target terminal to directly connect to the network access node, the method further includes:

[0048] Monitor whether the conditions for network access handover are met;

[0049] When the network access handover conditions are met, the target terminal is controlled to switch to the new access node; the new access node is determined based on the broadcast signal received by the target terminal.

[0050] In one possible implementation, the network access handover conditions include at least one of the following:

[0051] The communication parameters between the target terminal and the network access node are within the target parameter range; the communication parameters characterize the link quality of the first physical layer communication link;

[0052] The time interval since the last monitoring of whether the network handover conditions have been met reaches the target time.

[0053] A second aspect of this application provides a terminal network access device, comprising:

[0054] A signal receiving unit is used to receive broadcast signals transmitted by at least one network node in the target network;

[0055] The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminals include mobile terminals or fixed terminals.

[0056] An access selection unit is configured to select a network access node for the target terminal from the at least one network node based on the broadcast signal.

[0057] The direct connection control unit is used to control the target terminal to directly connect to the network access node, so that the target terminal can access the target network as a network node.

[0058] A third aspect of this application provides a computer program product including computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the terminal network access method described in the first aspect or any implementation thereof.

[0059] A fourth aspect of this application provides a target terminal, comprising:

[0060] A communication module is used to receive broadcast signals transmitted by at least one network node in the target network when the target terminal moves to the coverage area of ​​the target network;

[0061] The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminals include mobile terminals or fixed terminals.

[0062] The controller is configured to select a network access node for the target terminal from the at least one network node according to the broadcast signal; and control the target terminal to directly connect to the network access node, so that the target terminal accesses the target network as a network node.

[0063] The fifth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the terminal network access method described in the first aspect or any implementation thereof.

[0064] By means of the above technical solution, in the terminal network access method and apparatus provided in this application, since the target terminal independently discovers the target network by receiving broadcast signals and directly connects to the network access node to complete the network access, the data interaction between the target terminal and the network access node does not need to be relayed through other network nodes such as servers in the target network. Therefore, the communication path between the target terminal and the network access node is shortened to a one-hop direct connection, and the corresponding communication latency can be controlled at the millisecond level. Moreover, it does not rely on the public network, which can significantly reduce the communication latency of the communication terminal and thus improve the real-time performance of data communication. Attached Figure Description

[0065] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0066] Figure 1 A flowchart illustrating a terminal network access method provided in this application embodiment;

[0067] Figure 2This is an example diagram of a Mesh network in an embodiment of this application;

[0068] Figure 3 Another flowchart of a terminal network access method provided in this application embodiment;

[0069] Figure 4 Another flowchart of a terminal network access method provided in this application embodiment;

[0070] Figure 5 This is a partial flowchart of a terminal network access method provided in an embodiment of this application;

[0071] Figure 6 This is another part of the flowchart of a terminal network access method provided in the embodiments of this application;

[0072] Figure 7 This is another part of the flowchart of a terminal network access method provided in the embodiments of this application;

[0073] Figure 8 This is another part of the flowchart of a terminal network access method provided in the embodiments of this application;

[0074] Figure 9 This is a schematic diagram of the structure of a terminal network access device provided in an embodiment of this application;

[0075] Figure 10 Another structural schematic diagram of a terminal network access device provided in this application embodiment.

[0076] Figure 11 This application provides another schematic diagram of a terminal network access device.

[0077] Figure 12 This is another structural schematic diagram of a terminal network access device provided in an embodiment of this application;

[0078] Figure 13 This application provides another schematic diagram of a terminal network access device.

[0079] Figure 14 This is a schematic diagram of the structure of a target terminal provided in this embodiment. Detailed Implementation

[0080] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0081] As will be known to those skilled in the art, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0082] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0083] Reference Figure 1 This document presents a flowchart illustrating a terminal network access method according to an embodiment of this application. The method is applicable to target terminals, which are communication terminals equipped with a communication module. The target terminal can be a mobile terminal or a fixed terminal. Specifically, the target terminal can be an aerial vehicle equipped with a communication module, such as a drone or aircraft; or, the target terminal can be a ground-based vehicle equipped with a communication module, such as an unmanned vehicle or a manned vehicle. The technical solution in this embodiment primarily aims to reduce communication latency after the communication terminal accesses the network and improve the real-time performance of data communication.

[0084] Specifically, the method in this embodiment may include the following steps:

[0085] Step 101: Receive a broadcast signal transmitted by at least one network node in the target network.

[0086] The target network is a wireless mesh network (Mesh) composed of multiple communication terminals as network nodes. The communication terminals can be mobile or fixed terminals, such as low-altitude sensing terminals fixed on the ground (e.g., traffic signal equipment), low-altitude flying vehicles, or other similar devices.

[0087] It should be noted that during the operation of the target network, each network node can periodically or event-triggeredly transmit broadcast signals according to network protocols such as the Mesh protocol. The broadcast signals are used to announce the existence of the target network and the network status to other devices within the coverage area of ​​the target network.

[0088] Specifically, a broadcast signal carries at least the device ID, identity information, network entry role, network layer, time information, and upstream gateway device information of the network node sending the broadcast signal. The network entry role refers to the role a network node represents in the target network, such as the role of a direct gateway directly connected to a server in the target network, or the role of a chain gateway connected to a server through a direct gateway (possibly with one or more intervening chain gateways). The network layer represents the number of network nodes between the network node and the server in the target network. There is a correlation between the network entry role and the network layer. Time information can be used for time alignment, i.e., time synchronization, between network nodes. The upstream gateway device information represents the upstream network element to which the network node belongs, such as a chain gateway or a direct gateway, so that the receiver, i.e., the target terminal, understands the topology of the target network.

[0089] It should be noted that each network node in the target network has a backup node deployed. For example, a directly connected gateway can also be called a primary gateway, and the primary gateway has a backup gateway (also called a secondary gateway) deployed on it. Similarly, a chain gateway can also be called a primary chain gateway, and the primary chain gateway also has a backup gateway (also called a secondary chain gateway) deployed on it.

[0090] For example, such as Figure 2As shown, the target network consists of multiple network nodes. These nodes can include low-altitude sensing terminals fixed on the ground (such as traffic lights equipped with communication modules on the ground), high-altitude sensing terminals fixed at high altitudes (such as communication terminals equipped with communication modules on building rooftops), low-altitude flying vehicles that can move freely in the low altitude (such as drones), ground-based vehicles that can move freely on the ground (such as vehicles), and high-altitude flying vehicles (aircraft) that can move freely in the high altitude. The low-altitude sensing terminals can be equipped with integrated sensing components, such as a communication radio frequency unit and at least one sensor. The communication radio frequency unit can be a 24GHz radio frequency unit or a LoRa radio frequency unit, etc., serving as the underlying carrier channel. The 24GHz radio frequency unit operates at a different frequency than the LoRa radio frequency unit. The communication radio frequency unit can use a single radio frequency channel to simultaneously achieve target sensing and data communication without requiring an external independent communication module. In the target network, network connections are established directly between network nodes through radio frequency links implemented by the communication radio frequency units, forming a fully covered, self-maintaining, and self-healing ground-based low-altitude sensing backbone network, i.e., a mesh network. In the target network, at least some network nodes act as direct gateways directly connected to a server within the target network. The server serves as the central management platform, aggregating and managing all sensor data uploaded by network nodes, such as traffic conditions and weather information within spatial status information. At least some network nodes also act as chain gateways connected to the server via direct gateways. Additionally, at least some network nodes act as chain gateways connected to the server via other chain gateways and direct gateways. Each network node has a network hierarchy, representing the number of nodes separating it from the server. The more nodes separating a network node from the server, the higher the network hierarchy number. For example, a direct gateway has a network hierarchy of 0 (the highest level), a chain gateway directly connected to it has a network hierarchy of 1, a chain gateway connected to a direct gateway via one chain gateway has a network hierarchy of 2, a chain gateway connected to a direct gateway via two chain gateways has a network hierarchy of 3, and so on.

[0091] It should be noted that the connection relationships between network nodes in the target network can change dynamically, and there can be one or more communication paths between any two network nodes.

[0092] based on Figure 2 The target network shown has a target terminal, which is a drone. After flying into a certain low-altitude airspace, the drone scans through its communication module and receives broadcast signals from three ground-deployed low-altitude sensing terminals (such as traffic signal equipment or communication terminals mounted on the roof of a building) that cover the low-altitude airspace.

[0093] Step 102: Select an access node for the target terminal from at least one network node based on the broadcast signal.

[0094] Specifically, in this embodiment, the target terminal can process the received broadcast signal, extract relevant information from it, and determine one of the network nodes that sent the broadcast signal as the network access node based on the extracted relevant information.

[0095] It should be noted that the selection of access nodes for network entry is based on at least one of the following: the received signal strength indication (RSSI) of the broadcast signal, the network access role of the network node sending the broadcast signal in the target network, and the network layer of the network node sending the broadcast signal.

[0096] The RSSI of the broadcast signal reflects the quality of the wireless link between the network node and the target terminal; a stronger RSSI indicates better communication link quality. The network entry role and network layer reflect the network node's position within the target network.

[0097] For example, the target terminal receives broadcast signals from three network nodes and selects a suitable network node as the network access node based on these broadcast signals.

[0098] Step 103: Control the target terminal to directly connect to the network access node, so that the target terminal can access the target network as a network node.

[0099] In this process, after the target terminal determines the network access node, it initiates the network access process to the network access node and establishes a direct communication link with the network access node. Thus, the target terminal joins the target network as a new network node through the direct network access node.

[0100] It should be noted that direct connection of the target terminal to the network access node means that a one-hop communication link (also known as a one-hop direct link) is established between the target terminal and the network access node, and the two can directly exchange data without going through other network nodes.

[0101] Furthermore, the target terminal only needs to scan the broadcast signals of network nodes in the target network to autonomously select the optimal network access node and initiate a direct connection, without needing centralized scheduling and allocation through servers (such as cloud platforms) in the target network. Compared to traditional solutions where terminals need to go through a cloud platform to access the network, this embodiment adopts a decentralized autonomous network access scheme, which reduces the number of data interaction hops and does not rely on a cloud platform. This reduces network access latency and improves network access efficiency.

[0102] As can be seen from the above technical solution, in the terminal network access method provided in this application embodiment, since the target terminal independently discovers the target network by receiving broadcast signals and directly connects to the network access node to complete the network access, the data interaction between the target terminal and the network access node does not need to go through other network nodes such as servers in the target network for relay. Therefore, the communication path between the target terminal and the network access node is shortened to a one-hop direct connection, and the corresponding communication latency can be controlled at the millisecond level. Moreover, it does not rely on the public network, which can significantly reduce the communication latency of the communication terminal and thus improve the real-time performance of data communication.

[0103] based on Figure 1 In the implementation scheme shown, after step 103 in this embodiment, the following processing can also be performed, such as... Figure 3 As shown:

[0104] Step 104: Receive spatial status information sent by the network access node.

[0105] After successfully accessing the target network and establishing a direct link with the access node, the target terminal can receive spatial status information sent by the access node through this direct link. This spatial status information characterizes the spatial status of the space where the access node is located, including environmental conditions, air traffic conditions, and meteorological conditions within the airspace covered by the access node. For example, spatial status information may include one or more of the following: airspace status information, meteorological disaster early warning information, and mobility guidance instructions.

[0106] The airspace status information refers to the flight path status information that affects the movement of communication terminals within the airspace. Specifically, airspace status information can include airspace congestion or airspace availability information in the space where the network access node is located, such as the number of aircraft currently in the airspace and whether the capacity limit has been reached. Meteorological disaster warning information refers to the meteorological status information that affects the movement of communication terminals within the airspace. Specifically, meteorological disaster warning information can include wind shear or icing information, such as whether there is wind shear risk or icing conditions in the airspace. Mobility guidance instructions can include altitude adjustment instructions or turning suggestion instructions, used to guide the target terminal to adjust flight parameters to avoid risks or optimize its flight path. Mobility guidance instructions can be generated by the network access node or generated by a server and forwarded by the network access node.

[0107] It should be noted that spatial state information can be obtained by the network access node through its deployed integrated sensing and communication components. An integrated sensing and communication component refers to a hardware and software combination integrated on a network node, possessing both communication and sensing functions. Specifically, an integrated sensing and communication component may include a communication radio frequency unit and at least one sensor. The communication radio frequency unit is used to transmit and receive wireless signals to achieve communication functions, and can also achieve sensing functions (such as detecting the position and velocity of aerial targets) by analyzing the echoes of wireless signals, thus integrating sensing and communication. The sensor is used to collect environmental physical quantities within the airspace, such as weather sensors collecting temperature, humidity, and wind speed.

[0108] For example, a network access node could be a low-altitude sensing terminal deployed on a city rooftop. It transmits a 24GHz broadcast signal via its communication radio frequency unit and receives the reflected echo, detecting the presence of a drone within its coverage area and calculating the drone's position and speed. Simultaneously, the low-altitude sensing terminal detects a current wind speed of 15 m / s using an integrated wind speed sensor. The network access node then sends this information as part of its spatial status information to the target terminal already connected to the network.

[0109] Step 105: Perform the corresponding processing operations based on the spatial status information.

[0110] The specific type of processing operation depends on the content contained in the spatial state information.

[0111] For example, if the spatial status information includes airspace congestion information, the target terminal can replan its flight path based on the airspace congestion information to avoid congested areas;

[0112] For example, if the spatial status information includes meteorological disaster warning information (such as wind shear), the target terminal can trigger an airborne alarm to remind the driver to take precautions, or the autopilot system can automatically perform the precautionary operation.

[0113] For example, if the space status information contains movement guidance instructions (such as turning suggestions), the target terminal can use these movement guidance instructions as flight control inputs to adjust its heading or altitude.

[0114] It should be noted that the above processing operations can be performed autonomously by the target terminal, or the target terminal can present the spatial status information to the operator, who will then make a decision and execute the operation.

[0115] As can be seen, after joining the network, the target terminal directly obtains spatial status information from the network access node via a single-hop direct link. Based on this, this embodiment can eliminate the two intermediate links of uploading to the platform and forwarding to the platform, shortening the communication link to a single hop of "network access node - target terminal," which helps to significantly reduce the latency for the target terminal to obtain spatial status information. Moreover, since information such as airspace status and meteorological disasters in low-altitude flight scenarios is highly time-sensitive, the reduction in latency enables the target terminal to be aware of risks and respond more promptly, thereby improving flight safety.

[0116] based on Figure 1 The technical solution shown in this embodiment, after step 103, can also include the following processing, such as... Figure 4 As shown:

[0117] Step 106: Obtain the terminal status information of the target terminal.

[0118] After successfully joining the network, the target terminal, as a network node in the target network, periodically obtains terminal status information. The terminal status information represents the target terminal's movement status in its spatial location, and is subsequently provided to other network nodes in the target network (including the access node and other network nodes) to understand the current operating status of the target terminal.

[0119] Specifically, terminal status information may include one or more of the following: the target terminal's location information (such as latitude, longitude, and altitude), the target terminal's speed information, movement intention information, and device status information. For example, movement intention information may include the target terminal's heading information and / or target point information, used to indicate the target terminal's current direction of movement (such as flight or driving) and the planned location of the target point, so that other network nodes can predict the target terminal's future trajectory (such as flight routes or driving routes). Device status information may include the target terminal's battery level information and / or fault code information. Battery level information at least represents the target terminal's remaining available battery power, specifically expressed as a percentage. Fault code information is used to indicate the target terminal's own battery life and health status; for example, fault code information may include the type of operational fault that occurred in the target terminal, the time of occurrence, etc.

[0120] Step 107: Send the terminal status information to the network access node.

[0121] The target terminal sends terminal status information via broadcast. All network nodes (including network access nodes) within the coverage area of ​​the target terminal through its communication module (communication radio frequency unit) can receive this terminal status information.

[0122] Specifically, after receiving the terminal status information broadcast by the target terminal, the network access node can perform corresponding processing based on the terminal status information.

[0123] The specific types of processing depend on the content of the terminal status information. For example, after receiving the target terminal's location and speed information, the network access node can generate a conflict warning by combining this information with the local airspace situation perceived by its integrated sensing components. Alternatively, if the network access node determines, based on the terminal status information, that there is a risk of collision between the target terminal's current location and the predicted location of another aircraft, it can send an avoidance guidance command to the target terminal. Furthermore, after receiving the target terminal's movement intention information (heading and target point), the network access node can predict the target terminal's future trajectory and pre-allocate airspace resources, such as reserving a route for the target terminal or adjusting traffic light-style airspace passage instructions. Finally, after receiving the target terminal's device status information (such as low battery or fault codes), the network access node can perform maintenance and management, triggering local alarms in case of anomalies, or issuing a return-to-home guidance command to the target terminal.

[0124] As can be seen, in this embodiment, the target terminal actively reports its own terminal status information via broadcast, enabling other network nodes in the target network to be aware of the target terminal's dynamics in real time, without needing centralized querying or polling through a cloud platform mounted on the server. Based on this, this embodiment adopts a method of active broadcast reporting by the communication terminal, which reduces the query overhead on the cloud platform side and the waiting time for the communication terminal to query, facilitating more efficient situational awareness and more timely conflict warnings. Simultaneously, the network access node makes decisions based on the target terminal's terminal status information combined with local sensing data, further reducing reliance on centralized decision-making by the cloud platform, thereby improving the response speed of terminal control.

[0125] based on Figure 1 In one implementation of the technical solution shown, step 102, when selecting an access node for the target terminal from at least one network node based on the broadcast signal, can be achieved in the following way: Figure 5 As shown:

[0126] Step 501: Obtain the signal strength information of the broadcast signal.

[0127] In this embodiment, after receiving broadcast signals from various network nodes, the target terminal measures the RSSI of each broadcast signal as signal strength information. RSSI is a physical quantity that measures the power of a broadcast signal, and its unit can be dBm. Specifically, the larger the RSSI value (i.e., the smaller the absolute value, such as -50dBm being better than -70dBm), the higher the signal strength of the broadcast signal, and the better the link quality of the corresponding wireless communication link. Based on this, in this embodiment, the target terminal records the RSSI value of each received broadcast signal as a basis for subsequently selecting an access node to join the network.

[0128] Step 502: Select an access node for the target terminal from at least one network node, based on the signal strength information.

[0129] The target terminal can select one of the network nodes that sent the broadcast signals as the network access node based on the RSSI value of each broadcast signal.

[0130] In one implementation, step 502 can select the network access node in the following way:

[0131] First, the target terminal sorts the network nodes corresponding to the signal strength information in descending order of signal strength. In other words, the network node with the larger RSSI value is ranked higher.

[0132] Secondly, the network node ranked first is selected as the network access node.

[0133] In another implementation, step 502 can select the network access node in the following way:

[0134] First, the target terminal sorts the network nodes corresponding to the signal strength information in descending order of signal strength. In other words, the network node with the larger RSSI value is ranked higher.

[0135] Secondly, determine the number of network nodes ranked first. If there is only one network node ranked first, that is, there is a unique network node with the largest RSSI value, then the target terminal selects this unique network node as the network access node.

[0136] If there are multiple network nodes ranked first, meaning that multiple network nodes have the same RSSI value and are all at the maximum value, the target terminal further compares the network levels of these network nodes and selects the network node with the highest network level as the network access node.

[0137] In this context, network hierarchy represents the number of nodes separating a network node from a server in the target network. In the target network's architecture, at least some network nodes act as direct gateways, directly connecting to servers, while at least some act as chain gateways, indirectly connecting to servers through direct or other chain gateways. The highest network hierarchy has zero nodes separating a direct gateway from a server. The number of nodes separating a chain gateway from a server is the number of nodes corresponding to its superior chain gateway plus one. For example, if a chain gateway connects to a server through a direct gateway, it is separated from the server by one network node (the direct gateway), resulting in a network hierarchy of level 1. If a chain gateway connects to a direct gateway through another chain gateway and then to the server, it is separated from the server by two network nodes, resulting in a network hierarchy of level 2. Higher network hierarchy levels (smaller numbers) indicate closer network nodes to the server, fewer hops in the communication path, and lower latency. Therefore, when multiple network nodes ranked first have the same RSSI, the network node with the highest network hierarchy is preferentially selected as the access node.

[0138] In one implementation, step 502 can select the network access node in the following way:

[0139] First, the signal strength information and network level are weighted according to their respective weight values ​​to obtain the node score of the network node; for example, the node score is: α×RSSI+β×negative value of network level. Here, α and β are the weight values ​​corresponding to the signal strength information and network level, respectively, and the specific values ​​of the weight values ​​can be adjusted according to the actual application scenario.

[0140] Secondly, the network nodes are sorted in descending order of their node scores, and the network node ranked first is selected as the access node for network access.

[0141] If there are multiple network nodes ranked first, the network node with the highest signal strength is selected as the access node. If the signal strength information of multiple network nodes ranked first is the same, then the network node with the highest network level is selected as the access node.

[0142] As can be seen, this embodiment employs a two-tiered selection strategy: first sorting by signal strength, and then sorting by network layer if signal strength is the same. This ensures that the target terminal can guarantee link quality (optimal signal strength) when accessing the network, and also allows it to select the access node with a better network topology (highest network layer) when link quality is comparable, thereby reducing the number of hops in subsequent communication links. Therefore, this embodiment further considers network topology factors when signal strength is similar, ensuring that the selected access node achieves the lowest communication latency while reducing the data forwarding burden on intermediate network nodes.

[0143] based on Figure 1 In one implementation of the technical solution shown, in step 103, when the target terminal is directly connected to the network access node, the target terminal sends a network access request to the network access node.

[0144] The network access request is used to execute the network access process between the target terminal and the network access node. Specifically, after selecting a network access node, the target terminal can send a network access request to that node via a wireless communication link. The network access request carries information such as the target terminal's device identifier and communication information (e.g., supported frequency bands, modulation methods, etc.).

[0145] Specifically, the network access process may include the following steps, such as Figure 6 As shown:

[0146] Step 601: Time alignment is performed between the target terminal and the network access node.

[0147] In this process, the target terminal and the access node can perform time alignment through multiple interactive operations to ensure that the target terminal's time is synchronized with the global time of the target network. Time alignment is the foundation for orderly communication in a mesh network, because each network node in a mesh network sends data within its allocated time slots according to the division of superframe time slot clusters, and only time synchronization can avoid time slot conflicts.

[0148] In one specific implementation, the time alignment process may include the following interactive operations:

[0149] First, the access node sends a time synchronization beacon to the target terminal, which carries the current time information of the access node.

[0150] Secondly, the target terminal adjusts its local clock according to the received time synchronization beacon and sends a synchronization confirmation to the network access node.

[0151] If the time deviation still exceeds a preset deviation threshold, the above interactive operation is repeated until the time deviation is within the allowable range. For example, the deviation threshold can be a small value on the order of microseconds, so that the time alignment accuracy is on the order of microseconds.

[0152] Step 602: The target terminal receives the authentication result provided by the network access node.

[0153] The network access node verifies the identity of the target terminal to ensure that the target terminal requesting network access is a legitimate device.

[0154] Specifically, identity verification can be achieved using pre-shared keys, digital certificates, or other authentication methods. After verifying the identity of the target terminal, the access node returns the identity verification result to the target terminal. If the target terminal passes verification, the subsequent network access process continues; if verification fails, network access is rejected.

[0155] For example, both the target terminal and the network access node are pre-installed with the same security certificate. The network access node can verify the security certificate to authenticate the target terminal's identity.

[0156] Step 603: The target terminal receives the network access role provided by the network access node.

[0157] Among them, the network access role represents the network layer of the target terminal in the target network.

[0158] Specifically, after verifying the identity of the target terminal, the access node can assign a network access role to the target terminal based on the current resource status of the target network and the target terminal's network access request.

[0159] It should be noted that within the target network, network access roles include direct-connect gateways (the highest level, capable of directly connecting to servers) and chain gateways (connecting to servers via direct-connect gateways or other chain gateways). For example, in a low-altitude sensing scenario, ground-based fixed low-altitude sensing terminals can compete to become either direct-connect gateways or chain gateways, while mobile terminals such as flying vehicles can be assigned as chain gateways, such as chain gateways with a network layer of 1 or greater. These chain gateways directly connect to the direct-connect gateway or its backup gateway (i.e., a slave gateway), without connecting to other chain gateways.

[0160] Step 604: The target terminal receives the time slot resources allocated by the network access node.

[0161] In this process, the access node can allocate time slot resources to the target terminal according to the Mesh protocol. These time slot resources are used for data transmission and reception by the target terminal after it joins the network. The access node can allocate one or more idle time slots to the target terminal based on the time slot occupancy status of the target network, allowing the target terminal to transmit data within the allocated time slots without conflicting with other network nodes. After receiving the time slot resources, the target terminal completes the network entry process and officially becomes a member of the target network.

[0162] It should be noted that the execution order of steps 601 to 604 is not restricted by any particular order. Figure 6 The execution order shown, whether any step is executed first or all steps are executed in parallel, are all within the scope of protection of this application.

[0163] As can be seen, this embodiment ensures that the target terminal joins the target network in an orderly and conflict-free manner through a complete network access process, including time alignment, authentication, role allocation, and time slot allocation. Therefore, this embodiment adopts a resource allocation mode where the network access node makes local decisions. The network access node autonomously completes time slot and role allocation without requesting resources from the server (cloud platform) or waiting for the server to return the allocation results. This helps to shorten the network access process time and improve the efficiency of terminal network access.

[0164] In one specific implementation, the target terminal and the network access node can communicate via a first physical layer communication link; based on this, after controlling the target terminal to directly connect to the network access node in step 103 of this embodiment, the following processing flow can also be included, such as... Figure 7 As shown:

[0165] Step 701: Monitor the communication parameters between the target terminal and the network access node.

[0166] The communication parameters characterize the link quality of the first physical layer communication link.

[0167] Specifically, the target terminal continuously or periodically monitors the communication parameters of the first physical layer communication link during the communication process. The communication parameters may include at least one of the following: RSSI, signal-to-noise ratio (SNR), packet loss rate, communication delay, etc.

[0168] Among them, RSSI and SNR can reflect the signal quality of the physical layer. The higher the value, the better the link quality of the communication link. Packet loss rate can reflect the reliability of data transmission in the communication link. The lower the value, the more stable the communication link. Communication delay can reflect the real-time performance of data transmission in the communication link. The lower the value, the smaller the delay of the communication link.

[0169] For example, during the communication process between the target terminal and the network access node through the first physical layer communication link, the target terminal measures the RSSI and packet loss rate of the current communication link every 100ms.

[0170] Step 702: Determine whether the communication parameters meet the link switching conditions. If the communication parameters meet the link switching conditions, proceed to step 703; if the communication parameters do not meet the link switching conditions, return to step 701.

[0171] Step 703: Control the target terminal to switch to the second physical layer communication link to communicate with the network access node.

[0172] Each target terminal and each network node in the target network is configured with at least two physical layer communication links, such as a first physical layer communication link and a second physical layer communication link. The operating frequency bands of the first physical layer communication link and the second physical layer communication link are different. For example, the first physical layer communication link operates in the 24GHz band and is used for the main link communication scenario in line-of-sight, high-speed scenarios; the second physical layer communication link operates in the LoRa band (such as 433MHz, 470MHz, 868MHz or 915MHz) and is used for the backup link communication scenario in non-line-of-sight, low-speed scenarios.

[0173] It should be noted that if the target terminal determines that the communication parameters meet the preset link switching conditions, it will control the target terminal to switch from the first physical layer communication link to the second physical layer communication link, and continue to communicate with the network access node through the second physical layer communication link. Specifically, during the communication link switching process, the logical connection between the target terminal and the network access node remains unchanged, and only the underlying physical link (i.e., the physical layer communication link) is switched.

[0174] In one specific implementation, the link switching conditions may include at least one of the following:

[0175] The RSSI of the first physical layer communication link is less than or equal to the first threshold.

[0176] The packet loss rate of the first physical layer communication link is greater than or equal to the second threshold.

[0177] The communication delay of the first physical layer communication link is greater than or equal to the third threshold;

[0178] The SNR of the first physical layer communication link is less than or equal to the SNR of the second physical layer communication link.

[0179] The first, second, and third thresholds can be preset according to the actual application scenario, or dynamically adjusted based on the historical link quality statistics of the physical layer communication link.

[0180] For example, the first threshold can be set to -85dBm. When the RSSI of the first physical layer communication link is lower than -85dBm, link switching is triggered.

[0181] It should be noted that when performing communication link switching, the target terminal can adopt a "build first, then disconnect" soft handover method. That is, first establish a connection with the access node through the second physical layer communication link, and after confirming that the communication of the new physical layer communication link is normal, disconnect the first physical layer communication link to ensure that the communication between the target terminal and the access node is not interrupted.

[0182] Based on this, multiple physical layer communication links with different operating frequency bands are configured between the target terminal and the network access node. When the communication quality of the current operating frequency band's communication link deteriorates, it automatically switches to a backup communication link. This allows data transmission to bypass operating frequency bands with poor signal quality. By utilizing the complementary transmission characteristics of different operating frequency bands (e.g., the 24GHz band has a high data rate but weak diffraction capability, while the LoRa band has a low data rate but strong diffraction capability), communication connectivity can be maintained even when line-of-sight is obstructed or signal attenuation is severe. Therefore, this embodiment, through its multi-link redundancy backup and automatic switching scheme, can improve communication reliability and anti-interference capability, making it suitable for various communication scenarios.

[0183] In one specific implementation, after step 103 controls the target terminal to directly connect to the network access node, the following processing flow can also be included: Figure 8 As shown:

[0184] Step 801: Monitor whether the network access handover conditions are met. If the network access handover conditions are met, proceed to step 802; otherwise, return to step 801.

[0185] Step 802: Control the target terminal to switch to the new access node.

[0186] The new access node is determined based on the broadcast signal received by the target terminal.

[0187] Specifically, the implementation method for switching to the new access node in step 802 can be found in the previous text. Figure 1 The implementation shown involves reselecting the optimal new access node based on the RSSI and network layer of the broadcast signals received from each newly received network node; this will not be detailed here. After the target terminal determines the new access node, the specific procedures for the target terminal to perform the network access process can be found in the relevant sections above, such as time alignment with the new access node, authentication, role confirmation, and time slot allocation, to complete the handover to the new access node.

[0188] In this scenario, the target terminal may continuously move after joining the network (e.g., a drone performing a flight mission), and its location may constantly change. The signal strength information sent to the target terminal by the currently accessing network node may gradually weaken with increasing distance, while new network nodes may enter the target terminal's communication coverage area. Therefore, during communication with the accessing network node, the target terminal continuously or periodically monitors whether the network handover conditions are met.

[0189] In one specific implementation, the network access handover conditions may include, but are not limited to, at least one of the following:

[0190] The communication parameters between the target terminal and the current access node are within the target parameter range (e.g., RSSI is lower than the preset handover threshold).

[0191] The time interval since the last monitoring of whether the network access handover conditions have been met reaches the target time (e.g., periodically checking whether the network access handover conditions have been met according to the detection cycle, the detection cycle is every 500ms).

[0192] Furthermore, the network access handover conditions may also include: the RSSI of the broadcast signal received by the target terminal from other network nodes is higher than the RSSI of the current network access node and the difference exceeds a preset hysteresis threshold, which is used to prevent frequent handovers.

[0193] As can be seen, since the target terminal is constantly moving, the increasing distance between it and the current network access node leads to a gradual decrease in RSSI, an increase in packet loss rate, and a gradual deterioration in communication quality. If it remains connected to the same node without switching, communication will eventually be interrupted due to weak signal. Therefore, this embodiment periodically switches to a new access node, or continuously monitors communication parameters and switches to a new access node with a stronger signal when the network access switching conditions are met. This ensures that the target terminal maintains a connection with the network node with the best signal quality, thereby maintaining the continuity of the communication link in the mobile scenario of the target terminal and avoiding communication interruptions caused by signal deterioration. This guarantees the real-time communication needs of the communication terminal during movement.

[0194] The above describes a terminal network access method provided by the embodiments of this application. The following will describe the apparatus for performing the above terminal network access method.

[0195] Please see Figure 9 This is a schematic diagram of a terminal network access device provided in an embodiment of this application. The device can be deployed on a target terminal, which refers to a communication terminal with a communication module. The target terminal can be a mobile terminal or a fixed terminal. Specifically, the target terminal can be a flight vehicle equipped with a communication module, such as a drone or aircraft; or, the target terminal can be a ground-based vehicle equipped with a communication module, such as an unmanned vehicle or a manned vehicle. The technical solution in this embodiment is mainly used to reduce the communication latency after the communication terminal accesses the network and improve the real-time performance of data communication.

[0196] Specifically, the apparatus in this embodiment may include the following units:

[0197] The signal receiving unit 901 is used to receive broadcast signals transmitted by at least one network node in the target network;

[0198] The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminals include mobile terminals or fixed terminals.

[0199] Access selection unit 902 is used to select a network access node for the target terminal from the at least one network node according to the broadcast signal;

[0200] The direct connection control unit 903 is used to control the target terminal to directly connect to the network access node, so that the target terminal can access the target network as a network node.

[0201] As can be seen from the above technical solution, in the terminal network access device provided in this application embodiment, since the target terminal independently discovers the target network by receiving broadcast signals and directly connects to the network access node to complete the network access, the data interaction between the target terminal and the network access node does not need to go through other network nodes such as servers in the target network for relay. Therefore, the communication path between the target terminal and the network access node is shortened to a one-hop direct connection, and the corresponding communication latency can be controlled at the millisecond level. Moreover, it does not rely on the public network, which can significantly reduce the communication latency of the communication terminal and thus improve the real-time performance of data communication.

[0202] In one implementation, the apparatus in this embodiment may further include the following units, such as... Figure 10 As shown:

[0203] The status receiving unit 904 is used to receive spatial status information sent by the network access node after the direct connection control unit 903 controls the target terminal to directly connect to the network access node; and to perform corresponding processing operations based on the spatial status information; wherein the spatial status information represents the spatial status of the space where the network access node is located; and the spatial status information is obtained by the network access node through its deployed integrated sensing component.

[0204] The spatial status information includes one or more of the following: airspace status information, meteorological disaster early warning information, and movement guidance instructions; the airspace status information includes airspace congestion information or airspace vacancy information in the space where the network access node is located; the meteorological disaster early warning information includes wind shear information or icing information; the movement guidance instructions include altitude adjustment instructions or turning suggestion instructions; the integrated sensing component includes: a communication radio frequency unit deployed in the network node and at least one sensor.

[0205] In one implementation, the apparatus in this embodiment may further include the following units, such as... Figure 11 As shown:

[0206] The status broadcast unit 905 is used to obtain the terminal status information of the target terminal after the direct connection control unit 903 controls the target terminal to directly connect to the network access node; the terminal status information represents the movement status of the target terminal in its space; and to send the terminal status information to the network access node; wherein the terminal status information includes one or more of the following: the location information of the target terminal, the speed information of the target terminal, the movement intention information, and the device status information; the movement intention information includes the heading information and / or target point information of the target terminal; and the device status information includes the battery information and / or fault code information of the target terminal.

[0207] In one implementation, the access selection unit 902 is specifically used to: obtain signal strength information of the broadcast signal; and select an access node for the target terminal from at least one network node based on the signal strength information.

[0208] Specifically, when the access selection unit 902 selects an access node for the target terminal from at least one network node based on the signal strength information, it is configured to: sort the network nodes to which the signal strength information belongs in descending order; if there is only one network node at the top of the sorted list, select the network node at the top of the sorted list as the access node; if there are multiple network nodes at the top of the sorted list, select the network node with the highest network level as the access node; wherein at least some network nodes in the target network act as direct gateways directly connected to the server in the target network, and at least some network nodes in the target network act as chain gateways connected to the server through the direct gateways; at least some network nodes in the target network act as chain gateways connected to the server through other chain gateways and the direct gateways; the network level represents the number of nodes between the network node and the server.

[0209] In one implementation, the direct connection control unit 903 is specifically used to: control the target terminal to send a network access request to the network access node, the network access request being used to execute a network access process between the target terminal and the network access node;

[0210] The network access process includes: time alignment between the target terminal and the network access node; the target terminal receiving the authentication result provided by the network access node; the target terminal receiving the network access role provided by the network access node; the network access role representing the network layer of the target terminal in the target network; and the target terminal receiving the time slot resources allocated by the network access node.

[0211] In one implementation, the target terminal communicates with the network access node via a first physical layer communication link;

[0212] The apparatus in this embodiment may further include the following units, such as... Figure 12 As shown:

[0213] The link switching unit 906 is used to monitor the communication parameters between the target terminal and the network access node after the direct connection control unit 903 controls the target terminal to directly connect to the network access node; the communication parameters characterize the link quality of the first physical layer communication link; when the communication parameters meet the link switching conditions, the unit controls the target terminal to switch to the second physical layer communication link to communicate with the network access node; wherein the operating frequency band of the first physical layer communication link is different from the operating frequency band of the second physical layer communication link.

[0214] Specifically, the communication parameters include at least one of the following: received signal strength indication, signal-to-noise ratio, packet loss rate, and communication delay; the switching conditions include at least one of the following: the received signal strength indication of the first physical layer communication link is less than or equal to a first threshold; the packet loss rate of the first physical layer communication link is greater than or equal to a second threshold; the communication delay of the first physical layer communication link is greater than or equal to a third threshold; and the signal-to-noise ratio of the first physical layer communication link is less than or equal to the signal-to-noise ratio of the second physical layer communication link.

[0215] In one implementation, the apparatus in this embodiment may further include the following units, such as... Figure 13 As shown:

[0216] The network access switching unit 907 is used to monitor whether the network access switching conditions are met after the direct connection control unit 903 controls the target terminal to directly connect to the network access node; if the network access switching conditions are met, it controls the target terminal to switch to the new access node; the new access node is determined based on the broadcast signal received by the target terminal.

[0217] The network access handover conditions include at least one of the following: the communication parameters between the target terminal and the network access node are within the target parameter range; the communication parameters characterize the link quality of the first physical layer communication link; and the time interval since the last monitoring of whether the network access handover conditions have been met has reached the target time.

[0218] It should be noted that the specific implementation of each unit in this embodiment can be referred to the corresponding content above, and will not be described in detail here.

[0219] refer to Figure 14This is a schematic diagram of the structure of a target terminal provided in this embodiment. The target terminal may include the following structure:

[0220] The communication module 1401 is used to receive broadcast signals transmitted by at least one network node in the target network when the target terminal moves to the coverage area of ​​the target network.

[0221] The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminals include mobile terminals or fixed terminals.

[0222] Specifically, the communication module 1401 can support one or more physical layer communication technologies, such as simultaneously supporting 24GHz band communication and LoRa band communication.

[0223] The controller 1402 is configured to select a network access node for the target terminal from the at least one network node according to the broadcast signal; and control the target terminal to directly connect to the network access node, so that the target terminal accesses the target network as a network node.

[0224] As can be seen from the above technical solution, in the target terminal provided in this application embodiment, since the target terminal independently discovers the target network by receiving broadcast signals and directly connects to the network access node to complete the network access, the data interaction between the target terminal and the network access node does not need to go through other network nodes such as servers in the target network for relay. Therefore, the communication path between the target terminal and the network access node is shortened to a one-hop direct connection, and the corresponding communication latency can be controlled at the millisecond level, and it does not rely on the public network. This can significantly reduce the communication latency of the communication terminal and thus improve the real-time performance of data communication.

[0225] This application also provides a computer program product, which is deployed in any communication terminal in a target network. The computer program product includes computer-readable instructions. When the computer-readable instructions are run on the electronic device, the electronic device enables the electronic device to implement any of the terminal network access methods provided in this application.

[0226] This application also provides a computer-readable storage medium deployed in any communication terminal in a target network. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the terminal network access methods provided in this application.

[0227] based on Figure 2 The mesh network shown below, taking the target terminal as the flight carrier as an example, illustrates the technical solution of this application. The specific implementation logic includes the following process:

[0228] 1. Direct network connection of 24GHz integrated sensing terminal:

[0229] The ground-based low-altitude sensing terminal uses a 24GHz radio frequency channel to simultaneously achieve target sensing and data communication. No external communication modules are required between terminals; they directly establish mesh connections via the 24GHz link, forming a fully covered, self-maintaining, and self-healing ground-based low-altitude sensing backbone network, achieving and completing the following tasks:

[0230] (1) Node discovery and identity competition

[0231] (2) Broadcasting and Synchronization

[0232] (3) Sensing data sharing

[0233] (4) Interaction between instructions and status

[0234] 2. Lightweight Flight Vehicle Network Access Process:

[0235] (1) After the flight vehicle is powered on, it scans the channel in the 24GHz band and listens to the broadcast signal of the ground terminal;

[0236] (2) Automatically identify available main gateways or main chain gateways, and select the optimal access point based on signal strength and network element structure;

[0237] (3) Automatically obtain the identity of n-level main chain gateway or slave chain gateway according to the rules of the parent case, without seizing the identity of ground backbone node;

[0238] (4) After network access is completed, it directly receives broadcast information, synchronization information and airspace perception data sent by ground terminals;

[0239] 3. Air-to-ground direct communication mode:

[0240] (1) A one-hop direct connection is achieved between the flight vehicle and the ground terminal (network access node), without the need for platform forwarding;

[0241] (2) The flight vehicle uploads its location, altitude, status, and flight intention in real time;

[0242] (3) Ground terminals directly issue airspace status, early warning information, and flight guidance instructions;

[0243] (4) Achieve real-time, reliable, and short-latency interaction between air and ground;

[0244] 4. Hybrid dynamic and static networking mechanism:

[0245] (1) Ground static terminal: As the main gateway / slave gateway / main chain gateway, it builds a stable backbone topology;

[0246] (2) Flight vehicle: As a mobile node, it dynamically accesses the network as a main chain gateway / slave chain gateway / terminal;

[0247] (3) The network automatically updates the access level and routing path according to the change of the flight vehicle's location to maintain uninterrupted communication;

[0248] 5. Multi-link compatibility and redundancy backup:

[0249] (1) Supports the coexistence of 24GHz integrated sensing link and general wireless link:

[0250] (2) 24GHz high-speed links should be given priority in urban areas and line-of-sight environments;

[0251] (3) In environments with obstruction or long distance, the system can automatically switch to a backup link;

[0252] (4) Dual-link hot backup ensures low-altitude flight safety and communication continuity;

[0253] It is evident that the technical solution of this application has the following advantages:

[0254] (1) Achieve integrated 24GHz sensing and communication networking with extremely simple hardware, low cost, and easy deployment;

[0255] (2) The flight vehicle is lightweight, requires no configuration, and automatically connects to the network, meaning it connects to the low-altitude network as soon as it is powered on;

[0256] (3) Direct air-to-ground connection and transmission, without cloud relay, resulting in lower latency and higher reliability;

[0257] (4) The dynamic and static hybrid networking is stable and reliable, and the mobile nodes do not affect the backbone network;

[0258] (5) Dedicated low-altitude frequency band networking, anti-interference, anti-blocking, suitable for complex urban environments;

[0259] (6) It can be widely adopted to support low-altitude full-domain visualization, intelligent supervision and safety assurance.

[0260] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0261] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0262] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0263] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A method for terminal network access, characterized in that, Applied to a target terminal, the method includes: Receive broadcast signals transmitted by at least one network node in the target network; The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminal is a mobile terminal or a fixed terminal. Based on the broadcast signal, select a network access node for the target terminal from the at least one network node; The target terminal is controlled to directly connect to the network access node, so that the target terminal is connected to the target network as a network node.

2. The method according to claim 1, characterized in that, After controlling the target terminal to directly connect to the network access node, the method further includes: Receive spatial status information sent by the network access node; Based on the spatial state information, perform the corresponding processing operations; The spatial state information represents the spatial state of the space where the network access node is located; the spatial state information is obtained by the network access node through its deployed integrated sensing components.

3. The method according to claim 2, characterized in that, The spatial status information includes one or more of the following: airspace status information, meteorological disaster early warning information, and movement guidance instructions; The airspace status information includes airspace congestion information or airspace vacancy information in the space where the network access node is located; the meteorological disaster early warning information includes wind shear information or icing information; the movement guidance instructions include altitude adjustment instructions or turning suggestion instructions. The integrated sensing component includes: a communication radio frequency unit deployed in the network node and at least one sensor.

4. The method according to claim 1 or 2, characterized in that, The method further includes: Obtain the terminal status information of the target terminal; the terminal status information represents the movement status of the target terminal in its spatial location; Send the terminal status information to the network access node; The terminal status information includes one or more of the following: the location information of the target terminal, the speed information of the target terminal, the movement intention information, and the device status information; the movement intention information includes the heading information and / or target point information of the target terminal; the device status information includes the battery information and / or fault code information of the target terminal.

5. The method according to claim 1, characterized in that, Based on the broadcast signal, selecting a network access node for the target terminal from the at least one network node includes: Obtain the signal strength information of the broadcast signal; Based at least on the signal strength information, a network access node is selected for the target terminal from at least one network node.

6. The method according to claim 5, characterized in that, Based at least on the signal strength information, selecting an access node for the target terminal from the at least one network node includes: The network nodes to which the signal strength information belongs are sorted in descending order of signal strength information; If there is only one network node ranked first, select the network node ranked first as the access node; If there are multiple network nodes that rank first in the network hierarchy, the network node with the highest network level will be selected as the access node. In this context, at least some network nodes in the target network act as direct gateways directly connected to servers in the target network; at least some network nodes in the target network act as chain gateways connected to servers through the direct gateways; and at least some network nodes in the target network act as chain gateways connected to servers through other chain gateways and the direct gateways. The network hierarchy represents the number of nodes that separate the network nodes from the servers.

7. The method according to claim 1, characterized in that, The control of the target terminal to directly connect to the network access node includes: The target terminal is controlled to send a network access request to the network access node, and the network access request is used to execute the network access process between the target terminal and the network access node. The network access process includes: The target terminal and the network access node are time-aligned. The target terminal receives the authentication result provided by the network access node; The target terminal receives a network access role provided by the network access node; the network access role represents the network layer of the target terminal in the target network. The target terminal receives the time slot resources allocated by the network access node.

8. The method according to claim 1, characterized in that, The target terminal communicates with the network access node through a first physical layer communication link; The method further includes, after controlling the target terminal to directly connect to the network access node: Monitor the communication parameters between the target terminal and the network access node; the communication parameters characterize the link quality of the first physical layer communication link; When the communication parameters meet the link switching conditions, the target terminal is controlled to switch to the second physical layer communication link to communicate with the network access node; The operating frequency band of the first physical layer communication link is different from that of the second physical layer communication link.

9. The method according to claim 8, characterized in that, The communication parameters include at least one of the following: received signal strength indication, signal-to-noise ratio, packet loss rate, and communication delay; The switching conditions include at least one of the following: The received signal strength indication of the first physical layer communication link is less than or equal to a first threshold; The packet loss rate of the first physical layer communication link is greater than or equal to the second threshold. The communication delay of the first physical layer communication link is greater than or equal to the third threshold; The signal-to-noise ratio of the first physical layer communication link is less than or equal to the signal-to-noise ratio of the second physical layer communication link.

10. The method according to claim 1, characterized in that, After controlling the target terminal to directly connect to the network access node, the method further includes: Monitor whether the conditions for network access handover are met; When the network access handover conditions are met, the target terminal is controlled to switch to the new access node; the new access node is determined based on the broadcast signal received by the target terminal.

11. The method according to claim 10, characterized in that, The network access handover conditions include at least one of the following: The communication parameters between the target terminal and the network access node are within the target parameter range; the communication parameters characterize the link quality of the first physical layer communication link; The time interval since the last monitoring of whether the network handover conditions have been met reaches the target time.

12. A terminal network access device, characterized in that, include: A signal receiving unit is used to receive broadcast signals transmitted by at least one network node in the target network; The target network is a wireless mesh network composed of multiple communication terminals as network nodes; the communication terminals include mobile terminals or fixed terminals. An access selection unit is configured to select a network access node for the target terminal from the at least one network node based on the broadcast signal. The direct connection control unit is used to control the target terminal to directly connect to the network access node, so that the target terminal can access the target network as a network node.

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