Network switching method and device, terminal, storage medium and maritime communication system

Abstract

The embodiment of the invention provides a network switching method. The method comprises the following steps: acquiring signal strength of a first satellite network and network parameters of a ground mobile network under the condition of accessing the first satellite network; under the condition that the signal intensity meets a first network switching condition, switching to access a second satellite network; and under the condition that the network parameter does not meet the second network switching condition, switching to access the ground mobile network. According to the invention, the problem of poor communication quality of the deep and far sea wind power plant caused by complex and dynamic changes of environments such as the deep and far sea in the prior art can be solved.

Description

Technical Field

[0001] This application belongs to the field of communication technologies, and particularly relates to a network switching method, apparatus, terminal, storage medium, and marine communication system. Background Art

[0002] With the saturation of the utilization of offshore wind power resources, future development will gradually shift from offshore to deep - sea. However, due to the long signal transmission distance and harsh environmental conditions in the areas where deep - sea wind farms are located, the signal leaving the port is weak, the signal around the wind turbines is weak, and there is no signal inside the wind turbine towers, resulting in poor communication quality in deep - sea wind farms.

[0003] In related technologies, usually only the most suitable communication method at that time is selected from communication methods such as terrestrial mobile communication, Beidou short message communication, and Tiantong communication, and then the communication method remains unchanged. However, with this method, due to the complex and dynamically changing deep - sea environment, such as bad weather (strong wind, heavy rain, lightning, etc.), seawater corrosion, and wave impact, the signal quality of the initially selected communication method will decline or even be interrupted, resulting in poor communication quality in deep - sea wind farms. Summary of the Invention

[0004] This application aims to provide a network switching method, apparatus, terminal, storage medium, and marine communication system, at least solving the problem of poor communication quality in deep - sea wind farms due to the complex and dynamically changing deep - sea environment in the prior art.

[0005] To solve the above - mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of this application provides a network switching method applied to a marine communication system. The marine communication system includes a first satellite network, a second satellite network, and a terrestrial mobile network. The method includes:

[0007] When accessing the first satellite network, obtain the signal strength of the first satellite network and the network parameters of the terrestrial mobile network.

[0008] When the signal strength meets the first network switching condition, switch to access the second satellite network.

[0009] When the network parameters do not meet the second network switching condition, switch to access the terrestrial mobile network.

[0010] In a second aspect, the present invention provides a network switching apparatus applied to a marine communication system. The marine communication system includes a first satellite network, a second satellite network, and a terrestrial mobile network. The apparatus includes:

[0011] A first acquisition module, configured to obtain the signal strength of a first satellite network and the network parameters of a terrestrial mobile network when accessing the first satellite network;

[0012] A first switching module, configured to switch to accessing a second satellite network when the signal strength meets a first network switching condition;

[0013] A second switching module, configured to switch to accessing the terrestrial mobile network when the network parameters do not meet a second network switching condition.

[0014] In a third aspect, the present invention provides a terminal, including a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the method described in the first aspect is implemented.

[0015] In a fourth aspect, the present invention provides a readable storage medium. When the instructions in the readable storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect.

[0016] In a fifth aspect, the present invention provides a maritime communication system, which includes a terminal, a first satellite network, a second satellite network, and a terrestrial mobile network; the terminal is respectively communicatively connected to the first satellite network, the second satellite network, and the terrestrial mobile network; the terminal includes the terminal described in the third aspect.

[0017] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0018] By obtaining the signal strength of the first satellite network and the network parameters of the terrestrial mobile network when accessing the first satellite network; switching to access the second satellite network when the signal strength meets the first network switching condition; and switching to access the terrestrial mobile network when the network parameters do not meet the second network switching condition. In this way, through the network switching mechanism, dynamic adjustment can be performed between different networks. When the signal of the first satellite network is poor, it can be switched to the second satellite network; if the conditions of the terrestrial mobile network are suitable, it can be switched to the terrestrial mobile network again. This method of multi-network backup and switching greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea wind farm and the outside world always remains unobstructed, providing strong guarantee for the normal operation and management of the wind farm. And by performing network switching according to the network parameters and signal strength, it is possible to avoid over-investing resources in unsuitable networks, and by switching to the second satellite network or the terrestrial mobile network with better signals, while ensuring the communication quality, the communication resources can be reasonably utilized and the operation cost can be reduced. At the same time, it can also avoid communication congestion caused by overloading of a single network and improve the resource utilization rate of the overall communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a flowchart of a network switching method provided by an embodiment of the present application;

[0021] Figure 2 is a flowchart of another network switching method provided by an embodiment of the present application;

[0022] Figure 3 is a flowchart of another network switching method provided by an embodiment of the present application;

[0023] Figure 4 is a block diagram of a network switching device provided by an embodiment of the present application;;

[0024] Figure 5 is a structural diagram of a terminal provided by an embodiment of the present invention;

[0025] Figure 6 is a structural diagram of a maritime communication system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Before introducing the network switching method, device, terminal, storage medium and marine communication system provided by the present disclosure, the application scenarios involved in each embodiment of the present disclosure will be introduced first. The present disclosure can be applied to the scenario of communication network switching for deep - sea and far - sea wind farms. The network switching method provided by the embodiments of the present disclosure can be applied to terminal devices.

[0028] As the utilization of offshore wind power resources approaches saturation, in the future, it will gradually shift from offshore development to deep - sea and far - sea development. However, the construction and operation and maintenance of deep - sea and far - sea wind farms face many challenges, one of which is the communication problem. In the vast offshore wind farm, the signal transmission distance is long and the environmental conditions are harsh, resulting in weak signals leaving the port, weak signals around the wind turbines, and no signals inside the wind turbine towers. This causes disadvantages such as low efficiency, high cost, and untimely service in command and communication during the construction period and daily maintenance period. The "signal blind area" brings great difficulties to the construction and operation and maintenance of offshore wind turbines, brings many inconveniences to the normal work and life of construction workers, and also causes a great lag in safety monitoring and emergency rescue. The harsh marine communication environment constantly threatens the progress of offshore construction operations and the safety of workers. Therefore, during the operation process of deep - sea and far - sea wind farms, it is urgent to establish a set of safe, reliable, flexible - networking, economical and practical wireless communication system, and then build effective and applicable remote monitoring, command and dispatching means to meet the needs of daily operations of deep - sea and far - sea wind farms.

[0029] In the related art, usually only the most suitable communication method at that time is selected from communication methods such as terrestrial mobile communication, Beidou short message communication, and Tiantong communication, and then the communication method remains unchanged. However, using this method, due to the complex and dynamically changing deep - sea environment, such as bad weather (strong wind, heavy rain, lightning, etc.), seawater corrosion, and wave impact, the signal quality of the initially selected communication method will decline or even be interrupted, resulting in poor communication quality in deep - sea and far - sea wind farms.

[0030] To solve the above problems, the present disclosure provides a network switching method, apparatus, terminal, storage medium, and marine communication system. Through a network switching mechanism, dynamic adjustment can be performed between different networks. When the signal of the first satellite network is poor, it can be switched to the second satellite network; if the conditions of the terrestrial mobile network are suitable, it can be switched to the terrestrial mobile network again. This multi-network backup and switching method greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea and far-sea wind farms and the outside world always remains unobstructed, providing strong guarantee for the normal operation and management of the wind farms. And by performing network switching according to network parameters and signal strength, it is possible to avoid over-investing resources on unsuitable networks. By switching to the second satellite network or the terrestrial mobile network with better signals, while ensuring communication quality, communication resources can be reasonably utilized and operation costs can be reduced. At the same time, it can also avoid communication congestion caused by overloading of a single network and improve the resource utilization rate of the overall communication system.

[0031] The method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0032] Figure 1 is a flowchart of a network switching method provided by the embodiments of the present application. As Figure 1 shown, this method can be applied to a marine communication system, which includes a first satellite network, a second satellite network, and a terrestrial mobile network; this method may include the following steps.

[0033] In step 101, when accessing the first satellite network, obtain the signal strength of the first satellite network and the network parameters of the terrestrial mobile network.

[0034] Among them, the first satellite network may be a high-throughput satellite network, and the terrestrial mobile network may be a 4G / 5G mobile communication network (Fourth Generation Mobile Communication Technology / Fifth Generation Mobile Communication Technology Network).

[0035] In this step, if the first satellite network is a high-throughput satellite network, since the high-throughput satellite network is a network based on satellite communication technology, it establishes a connection with marine communication devices (such as communication terminals on offshore wind farms) through satellites to provide communication services for them. In the deep-sea and far-sea environment, due to the long distance from the land, the signal of the terrestrial mobile network may be weak or unavailable. At this time, the satellite network can achieve long-distance communication coverage and provide a communication network for the terminals.

[0036] When the terminal has accessed the first satellite network, it means that the terminal has established a communication link with the high-throughput satellite and can send and receive data, such as transmitting the operating data and monitoring information of the fan.

[0037] Then, the signal strength of the first satellite network can be obtained.

[0038] Among them, the signal strength is one of the important indicators to measure the communication quality of the satellite network. The signal detection module built in the communication device will monitor the signal strength received from the first satellite network in real time. The signal strength is usually expressed in units such as dBm (decibel milliwatt). The larger the value, the stronger the signal and the better the communication quality may be; the smaller the value, the weaker the signal, and problems such as unstable data transmission, increased latency, and even communication interruption may occur.

[0039] In the deep sea and far sea environment, the signal strength will be affected by various factors, such as the position of the satellite, weather conditions (such as clouds and heavy rain will attenuate the signal), and the antenna performance of the device. By obtaining the signal strength of the first satellite network in real time, the communication system can timely understand the current communication quality of the satellite network and provide an important basis for subsequent network switching decisions. For example, when the signal strength drops to a certain level, it may be necessary to consider switching to other networks to ensure the stability of communication.

[0040] And the network parameters of the terrestrial mobile network can be obtained while obtaining the signal strength of the first satellite network.

[0041] In this step, although the signal of the terrestrial mobile network may be weak in the deep sea and far sea area, there will still be available 4G / 5G networks in some sea areas close to the land or after special signal enhancement processing. The terminal can obtain the relevant network parameters by searching for the signals of surrounding 4G / 5G base stations.

[0042] In step 102, when the signal strength meets the first network switching condition, switch to access the second satellite network.

[0043] Among them, the first network switching condition is related to the signal strength of the first satellite network and can be determined comprehensively according to factors such as the performance requirements of the communication system, service requirements, and expectations for communication quality.

[0044] Exemplarily, when the signal strength of the first satellite network drops below a certain specific threshold, it is considered that the first network handover condition is met. The setting of this threshold usually takes into account that at this signal strength, continuing to use the first satellite network may lead to an increase in the data transmission error rate, a significant increase in latency, or a significant increase in the risk of communication interruption, thus affecting the normal operation of the maritime communication system. For example, it may not be possible to transmit critical monitoring data of wind power equipment in a timely manner, or the safety communication guarantee for maritime operation personnel is insufficient.

[0045] When it is determined that the signal strength of the first satellite network meets the first network handover condition, the maritime communication system can initiate the handover process and access the second satellite network. During the handover process, the terminal will first send an access request to the second satellite network, and this request may include relevant data such as the identity information and communication requirements of the terminal. After receiving the request, the second satellite network will perform operations such as authenticating the terminal and allocating resources. If the authentication is passed and there are sufficient resources to support the access of the terminal, the second satellite network will send a signal allowing access to the terminal. After receiving the signal allowing access, the terminal will adjust its communication parameters, such as frequency, coding method, etc., to adapt to the communication protocol and requirements of the second satellite network, thereby establishing a communication link with the second satellite network and completing the handover from the first satellite network to the second satellite network.

[0046] In this way, the second satellite network can serve as a backup or supplementary network and play an important role when the signal quality of the first satellite network deteriorates. It can provide communication services that are similar to but relatively independent of the first satellite network, ensuring the continuity and stability of communication. Since different satellite networks may have differences in coverage, signal transmission characteristics, etc., switching to the second satellite network may avoid factors that cause the signal of the first satellite network to deteriorate. For example, the first satellite network may be affected by space weather in a certain area, while the signal path of the second satellite network is not affected. Thus, in a complex deep-sea environment, it can provide a more reliable communication guarantee for the maritime communication system and ensure the normal development of services such as maritime wind power operations.

[0047] In step 103, when the network parameters do not meet the second network handover condition, switch to access the terrestrial mobile network.

[0048] Among them, the second network handover condition is the condition for accessing the terrestrial mobile network, and the network parameters include parameters such as signal strength, signal quality (such as signal-to-noise ratio), network bandwidth, and latency.

[0049] In this step, after switching to the second satellite network when the signal strength of the first satellite network meets the first network switching condition, it is still necessary to consider the availability and applicability of the terrestrial mobile network. If the communication effect of the second satellite network is still not ideal, or the development of the terrestrial mobile network has led to a significant improvement in its network parameters at the current location, it is necessary to determine whether to switch to the terrestrial mobile network according to the second network switching condition.

[0050] Even in the deep sea and far sea environment where the terrestrial mobile network usually has poor coverage, it may have certain communication capabilities in some specific areas. If the network parameters of the terrestrial mobile network meet the second network switching condition at this time, it can be switched to the terrestrial mobile network.

[0051] For example, in the case where it is determined that the network parameters do not meet the second network switching condition and it is decided to switch to access the terrestrial mobile network, the terminal will first search for available terrestrial mobile network base stations around it. It will send scanning signals to find nearby 4G / 5G base stations and obtain relevant information of the base stations, such as the identification of the base station, signal strength, etc. After finding a suitable base station, the terminal will send an access request to the base station. The request may include the identity information of the terminal device, supported communication protocols, and the type of communication services required, etc. After receiving the request, the base station will authenticate and authorize the terminal, check whether the terminal has the right to access the network, and allocate corresponding wireless resources to the terminal according to the network load situation and resource allocation strategy, such as frequency resources, time slots, etc.

[0052] After receiving the confirmation information and resource allocation instructions from the base station, the terminal will adjust its own communication parameters, synchronize with the base station of the terrestrial mobile network, and establish a communication link with the terrestrial mobile network, thus completing the switch from the satellite network to the terrestrial mobile network and realizing data transmission and communication services through the terrestrial mobile network.

[0053] Considering the terrestrial mobile network, such as 4G / 5G mobile communication networks, has a high data transmission rate and can meet some service requirements with high real-time and data volume requirements, such as the transmission of high-definition video surveillance data, remote real-time control of offshore wind power equipment, etc. Moreover, the communication delay of the terrestrial mobile network is relatively low, and for some services that require quick response, such as the instant communication between offshore operators and onshore control centers, it can provide a smoother communication experience. In addition, the operating cost of the terrestrial mobile network may be more advantageous than the satellite network to a certain extent, especially in the case of large data traffic. Using the terrestrial mobile network may reduce the communication cost and improve the economy and efficiency of the overall communication system.

[0054] In this embodiment, the first satellite network includes a high-throughput satellite communication network, the second satellite network may include a Beidou satellite network, and the terrestrial mobile network may include a terrestrial 4G / 5G communication network. The access priorities corresponding to the terrestrial mobile network, the first satellite network, and the second satellite network can be determined according to the operating costs of the networks. The terrestrial mobile network is at the first level, the first satellite network is at the second level, and the second satellite network is at the third level. That is to say, the terrestrial mobile network has the highest access priority, which is the first level; the first satellite network (high-throughput satellite communication network) has the second-highest access priority, which is the second level; the second satellite network (Beidou satellite network) has the lowest access priority, which is the third level. For example, when selecting network access, the terrestrial mobile network is considered first, followed by the high-throughput satellite communication network, and finally the Beidou satellite network.

[0055] Therefore, in some embodiments, when the terminal accesses the first satellite network, if the signal strength meets the first network switching condition and the network parameters do not meet the second network switching condition at the same time, in this case, the access priority of the terrestrial mobile network is higher than that of the second satellite network, and in this case, the terrestrial mobile network can be accessed preferentially.

[0056] Considering that the weather in the deep sea and far sea is complex and changeable, different weather conditions have different degrees of influence on communication signals. For example, weather such as heavy rain and thick fog will exacerbate signal transmission attenuation, strong winds may cause communication equipment to shake and affect signal reception, and lightning may generate electromagnetic interference to communication equipment and signals. By obtaining accurate weather information, the potential impact of the current environment on communication signals can be understood.

[0057] Therefore, in some embodiments, weather information can also be obtained, and meteorological adjustment parameters can be determined according to the weather information; and according to the meteorological adjustment parameters, the second network switching condition can be adjusted.

[0058] Among them, the second network switching condition may include a power threshold and a signal-to-interference-plus-noise ratio threshold.

[0059] Optionally, the difference between the power threshold and the meteorological adjustment parameter can be used as the adjusted power threshold; and the difference between the signal-to-interference-plus-noise ratio threshold and the meteorological adjustment parameter can be used as the adjusted signal-to-interference-plus-noise ratio threshold.

[0060] Exemplarily, since the satellite communication frequency band is more vulnerable to meteorological conditions than the terrestrial 4G / 5G communication frequency band, the communication mode switching can be adjusted according to the weather conditions. The worse the weather, the more inclined to use the terrestrial 4G / 5G communication network. Specifically, the meteorological adjustment parameter δ can be determined according to the weather information to cope with weather conditions such as rain attenuation. If the weather is good, such as sunny or few clouds, set δ = 0; if it is cloudy, set δ = 1; if it is overcast, set δ = 2; if it is light rain or light fog, set δ = 3; if it is moderate rain or moderate fog, set δ = 4; if it is heavy rain or heavy fog, set δ = 5. Use δ to adjust the switching threshold between the terrestrial 4G / 5G mobile communication mode and the high-throughput satellite communication mode of the device

[0061] In bad weather, the signal propagation is blocked, and the original switching conditions may be too strict, resulting in the system being unable to switch in time even if the terrestrial mobile network can actually provide a certain quality of communication service. After reducing the threshold, the system can more flexibly select a suitable communication network according to the actual situation, improving the reliability and stability of communication.

[0062] By adopting the above technical solution, dynamic adjustment can be carried out between different networks through the network switching mechanism. When the signal of the first satellite network is poor, it can be switched to the second satellite network; if the conditions of the terrestrial mobile network are suitable, it can be switched to the terrestrial mobile network again. This way of multi-network backup and switching greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea and far-sea wind farms and the outside world always remains unblocked, providing a strong guarantee for the normal operation and management of the wind farm. And by switching the network according to the network parameters and signal strength, it is possible to avoid over-investing resources on an unsuitable network. By switching to the second satellite network or the terrestrial mobile network with better signals, while ensuring the communication quality, the communication resources can be reasonably utilized and the operation cost can be reduced. At the same time, it can also avoid communication congestion caused by overloading a single network and improve the resource utilization rate of the overall communication system.

[0063] In some embodiments, another network switching method provided by the embodiments of the present application is as follows Figure 2As shown, after the terminal device is powered on, it can first obtain the network parameters of the terrestrial mobile network (i.e., 4G / 5G mobile communication network). The network parameters include signal reception power and signal signal-to-interference-plus-noise ratio. When it is determined that the signal reception power SS-RSRP ≥ -110 dBm, or the signal signal-to-interference-plus-noise ratio SS-SINR ≥ -3 dB, the 4G / 5G mobile communication network can be used for uplink access. The network switch automatically conducts the 4G / 5G communication module and the routing module, and provides signal uplink service for the user terminal through the routing module. In a possible implementation, when the 4G / 5G signal amplification function is enabled, the 4G / 5G mobile communication network can be used for uplink access. The network switch automatically conducts the 4G / 5G communication module and the routing module, and provides signal uplink service for the user terminal through the routing module.

[0064] When the obtained SS-RSRP < -110 dBm and SS-SINR < -3 dB, it can be determined that the current 4G / 5G mobile communication network signal strength is weak and needs to be switched to the high-throughput satellite network.

[0065] On this basis, it can continue to determine whether the signal strength of the obtained first satellite network (high-throughput satellite network) is greater than the strength and threshold. When it is determined that the signal strength RSSI of the obtained first satellite network ≥ -129 dBm, the high-throughput satellite network can be used for uplink access. The network switch automatically conducts the high-throughput satellite communication module and the routing module, and provides signal uplink service for the user terminal through the routing module.

[0066] And when using the high-throughput satellite network for uplink access, it can continuously detect the network parameters of the terrestrial mobile network (i.e., 4G / 5G mobile communication network). When the obtained SS-RSRP < -110 dBm and SS-SINR < -3 dB, it can be determined that the current 4G / 5G mobile communication network signal strength is weak, and the high-throughput satellite network can continue to be used for uplink access. However, if the signal reception power SS-RSRP ≥ -110 dBm, or the signal signal-to-interference-plus-noise ratio SS-SINR ≥ -3 dB, then when the 4G / 5G signal amplification function is enabled, the 4G / 5G mobile communication network can be used for uplink access. The network switch automatically conducts the 4G / 5G communication module and the routing module, and provides signal uplink service for the user terminal through the routing module.

[0067] In the case of switching to a high-throughput satellite network, it is possible to continue to determine whether the signal strength of the acquired first satellite network (high-throughput satellite network) is greater than the intensity and threshold. In the case where it is determined that the signal strength RSSI of the acquired first satellite network is < -129 dBm, the current high-throughput satellite network signal strength is weak, and it is necessary to access the second satellite network, that is, the Beidou satellite network mode, through short message communication.

[0068] And in the case of using the Beidou satellite network for uplink access, the network parameters of the ground mobile network (that is, the 4G / 5G mobile communication network) can be continuously detected. In the case where the acquired SS-RSRP < -110 dBm and SS-SINR < -3 dB, it can be determined that the current 4G / 5G mobile communication network signal strength is weak, and the high-throughput satellite network can continue to be used for uplink access; and in the case where the acquired signal reception power SS-RSRP ≥ -110 dBm, or the signal signal-to-interference-plus-noise ratio SS-SINR ≥ -3 dB, the 4G / 5G mobile communication network can be used for uplink access, and the network switching switch automatically conducts the 4G / 5G communication module and the routing module to provide signal uplink services for the user terminal through the routing module.

[0069] In this way, through the network switching mechanism, dynamic adjustment can be performed between different networks. When the signal of the first satellite network is not good, it can be switched to the second satellite network; if the conditions of the ground mobile network are appropriate, it can be switched to the ground mobile network again. This method of multi-network backup and switching greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea wind farm and the outside world always remains unobstructed, providing a strong guarantee for the normal operation and management of the wind farm. And by performing network switching according to network parameters and signal strength, it is possible to avoid over-investing resources on unsuitable networks, and by switching to the second satellite network or the ground mobile network with better signals, while ensuring communication quality, communication resources can be reasonably utilized and operating costs can be reduced. At the same time, it can also avoid communication congestion caused by overloading of a single network and improve the resource utilization rate of the overall communication system.

[0070] Figure 3 It is a flowchart of another network switching method provided by an embodiment of the present application. As Figure 3 shown, this method can be applied to a marine communication system, and the marine communication system includes a first satellite network, a second satellite network, and a ground mobile network; this method can include the following steps.

[0071] In step 201, in response to a triggered network access request, the network parameters of the ground mobile network and the signal strength of the first satellite network are acquired.

[0072] During the operation of a maritime communication system, network access requests may be triggered for various reasons. For example, a new maritime device (such as the communication module on a newly installed wind turbine) needs to access the communication network to transmit data.

[0073] Among them, the terrestrial mobile network includes 4G / 5G mobile communication networks, and the first satellite network includes high-throughput satellite networks.

[0074] In this step, after the terminal device is powered on, it can first automatically search for terrestrial 4G / 5G mobile communication network signals. For 4G, it mainly searches for frequency bands such as 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, and 2600MHz. For 5G, it mainly searches for frequency bands such as 700MHz, 2.5GHz, 3.5GHz, and 4.9GHz. The terminal device can automatically detect the parameters of the accessed 4G / 5G mobile communication network.

[0075] When a network access request is triggered, key information of the terrestrial mobile network and the first satellite network can be quickly obtained, so that the system can comprehensively judge based on this information and select the most suitable network for access, thereby ensuring the normal operation and communication quality of the maritime communication system.

[0076] In step 202, when the network parameters do not meet the second network switching condition, access the terrestrial mobile network.

[0077] Among them, the second network switching condition may include a set of criteria for accessing the terrestrial mobile network, which can be composed of thresholds of a series of network parameters. For example, it may include a power threshold and a signal-to-interference-plus-noise ratio threshold.

[0078] Optionally, when the signal reception power is greater than or equal to the power threshold, or the signal-to-interference-plus-noise ratio is greater than or equal to the signal-to-interference-plus-noise ratio threshold, through the network switching switch, the first communication module can provide signal uplink service for the terminal to access the terrestrial mobile network.

[0079] For example, when the obtained signal reception power SS-RSRP ≥ -110dBm, or the signal-to-interference-plus-noise ratio SS-SINR ≥ -3dB, the 4G / 5G mobile communication network can be used for uplink access. The network switching switch automatically conducts the 4G / 5G communication module and the routing module, and provides signal uplink service for the user terminal through the routing module.

[0080] After accessing the terrestrial mobile network, steps 203 and 204 can be executed.

[0081] In step 203, when accessing the terrestrial mobile network, obtain the network parameters of the terrestrial mobile network and the signal strength of the first satellite network.

[0082] In step 204, when the network parameters meet the second network switching condition, if the signal strength does not meet the first network switching condition, switch from the accessed terrestrial mobile network to access the first satellite network.

[0083] Wherein, the network parameters include signal reception power and signal signal-to-interference-plus-noise ratio.

[0084] In this step, when the signal reception power is less than the power threshold and the signal signal-to-interference-plus-noise ratio is less than the signal-to-interference-plus-noise ratio threshold, if the signal strength is greater than or equal to the strength threshold, through the network switching switch, switch the first communication module providing the signal uplink service for the terminal to the second communication module, so as to switch the terminal from the accessed terrestrial mobile network to access the first satellite network.

[0085] Exemplarily, when the obtained SS-RSRP < -110 dBm and SS-SINR < -3 dB, it can be determined that the signal strength of the current 4G / 5G mobile communication network is weak and needs to be switched to the high-throughput satellite network. On this basis, it can be further determined whether the signal strength of the obtained first satellite network is greater than the strength threshold. When it is determined that the signal strength RSSI of the obtained first satellite network ≥ -129 dBm, the high-throughput satellite network can be used for uplink access, and the network switching switch automatically conducts the high-throughput satellite communication module and the routing module, and provides the signal uplink service for the user terminal through the routing module.

[0086] In step 205, when the network parameters meet the second network switching condition and the signal strength does not meet the first network switching condition, access the first satellite network.

[0087] Optionally, when the signal reception power is less than the power threshold and the signal signal-to-interference-plus-noise ratio is less than the signal-to-interference-plus-noise ratio threshold, continue to determine whether the signal strength meets the first network switching condition, and when the signal strength does not meet the first network switching condition, through the network switching switch, enable the second communication module to provide the signal uplink service for the terminal, so as to access the first satellite network for the terminal.

[0088] For example, when the received signal strength SS-RSRP < -110 dBm or the signal signal-to-interference-plus-noise ratio SS-SINR < -3 dB, continue to determine whether the signal strength meets the first network handover condition. If it is determined that RSSI < -129 dBm, the current high-throughput satellite network signal strength is weak and it is necessary to access the second satellite network, that is, the Beidou satellite network mode, for short message communication.

[0089] After accessing the first satellite network, steps 206 to 208 can be executed.

[0090] In step 206, when accessing the first satellite network, obtain the signal strength of the first satellite network and the network parameters of the terrestrial mobile network.

[0091] In step 207, when the signal strength meets the first network handover condition, switch to access the second satellite network.

[0092] In this step, when the signal strength is less than the strength threshold, through the network switch, switch the second communication module that provides signal uplink service for the terminal to the third communication module, so as to switch the terminal from accessing the first satellite network to accessing the second satellite network.

[0093] For example, when it is determined that the signal strength RSSI of the obtained first satellite network < -129 dBm, the current first satellite network (i.e., high-throughput satellite network) signal strength is weak and it is necessary to switch to the second satellite network (i.e., Beidou satellite network) mode for short message communication.

[0094] In step 208, when the network parameters do not meet the second network handover condition, switch to access the terrestrial mobile network.

[0095] For example, when the received signal strength SS-RSRP ≥ -110 dBm or the signal signal-to-interference-plus-noise ratio SS-SINR ≥ -3 dB, 4G / 5G mobile communication networks can be used for uplink access. The network switch automatically conducts the 4G / 5G communication module and the routing module, and provides signal uplink service for the user terminal through the routing module.

[0096] In step 209, when the network parameters meet the second network handover condition and the signal strength meets the first network handover condition, access the second satellite network.

[0097] In this step, when the received signal strength is less than the power threshold and the signal signal-to-interference-plus-noise ratio is less than the signal-to-interference-plus-noise ratio threshold, if the signal strength is also less than the strength threshold, through the network switch, the third communication module provides signal uplink service for the terminal, so as to access the second satellite network for the terminal.

[0098] Exemplarily, when the obtained SS-RSRP < -110 dBm and SS-SINR < -3 dB, it can be determined that the current 4G / 5G mobile communication network signal strength is weak and needs to be switched to the high-throughput satellite network. On this basis, it can continue to determine whether the signal strength of the obtained first satellite network is greater than the strength and threshold. When it is determined that the RSSI of the obtained first satellite network signal strength < -129 dBm, it can be determined that the current first satellite network (i.e., the high-throughput satellite network) strength is weak and needs to be switched to the second satellite network (i.e., the Beidou satellite network). The network switching switch can be used to automatically conduct the Beidou satellite communication module and the routing module, and the routing module provides signal uplink service for the user terminal.

[0099] After accessing the second satellite network, steps 210 and 211 can be executed.

[0100] In step 210, when accessing the second satellite network, the network parameters of the terrestrial mobile network are obtained.

[0101] In step 211, when the network parameters do not meet the second network switching condition, switch from the accessed second satellite network to accessing the terrestrial mobile network.

[0102] Among them, the network parameters include signal reception power and signal signal-to-interference-plus-noise ratio.

[0103] In this step, when the signal reception power is greater than or equal to the power threshold, or the signal signal-to-interference-plus-noise ratio is greater than or equal to the signal-to-interference-plus-noise ratio threshold, through the network switching switch, the third communication module providing signal uplink service for the terminal is switched to the first communication module to switch the terminal from the accessed second satellite network to accessing the terrestrial mobile network.

[0104] By adopting the above technical solution, through the network switching mechanism, dynamic adjustment can be carried out between different networks. When the signal of the first satellite network is poor, it can be switched to the second satellite network; if the conditions of the terrestrial mobile network are appropriate, it can be switched to the terrestrial mobile network again. This way of multi-network backup and switching greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea wind farm and the outside world always remains unobstructed, providing a strong guarantee for the normal operation and management of the wind farm. And by switching networks according to network parameters and signal strength, it is possible to avoid over-investing resources in unsuitable networks, and by switching to the second satellite network or terrestrial mobile network with better signals, while ensuring communication quality, communication resources can be reasonably utilized and operating costs can be reduced. At the same time, it can also avoid communication congestion caused by overloading of a single network and improve the resource utilization rate of the overall communication system.

[0105] Figure 4 is a block diagram of a network switching device provided by an embodiment of the present application, as Figure 4 shown, the device 300 may include the following modules.

[0106] The first acquisition module 301 is configured to acquire the signal strength of the first satellite network and the network parameters of the terrestrial mobile network when accessing the first satellite network;

[0107] The first switching module 302 is configured to switch to access the second satellite network when the signal strength meets the first network switching condition;

[0108] The second switching module 303 is configured to switch to access the terrestrial mobile network when the network parameters do not meet the second network switching condition.

[0109] Optionally, the device further includes:

[0110] The second acquisition module is configured to acquire weather information and determine meteorological adjustment parameters according to the weather information;

[0111] The adjustment module is configured to adjust the second network switching condition according to the meteorological adjustment parameters.

[0112] Optionally, the second network switching condition includes a power threshold and a signal-to-interference-plus-noise ratio threshold; the adjustment module is configured to use the difference between the power threshold and the meteorological adjustment parameter as the adjusted power threshold; and use the difference between the signal-to-interference-plus-noise ratio threshold and the meteorological adjustment parameter as the adjusted signal-to-interference-plus-noise ratio threshold.

[0113] Optionally, the first switching module is configured to, when the signal strength is less than the strength threshold, switch, via a network switching switch, a second communication module that provides signal uplink service for the terminal to a third communication module, so as to switch the terminal from the accessed first satellite network to the accessed second satellite network.

[0114] Optionally, the apparatus further includes:

[0115] A third obtaining module, configured to obtain network parameters of the terrestrial mobile network and the signal strength of the first satellite network when accessing the terrestrial mobile network;

[0116] A third switching module, configured to, when the network parameters meet the second network switching condition and the signal strength does not meet the first network switching condition, switch from the accessed terrestrial mobile network to the accessed first satellite network.

[0117] Optionally, the network parameters include signal reception power and signal signal-to-interference-plus-noise ratio; the third switching module is configured to, when the signal reception power is less than the power threshold and the signal signal-to-interference-plus-noise ratio is less than the signal-to-interference-plus-noise ratio threshold, and the signal strength is greater than or equal to the strength threshold, switch, via a network switching switch, a first communication module that provides signal uplink service for the terminal to a second communication module, so as to switch the terminal from the accessed terrestrial mobile network to the accessed first satellite network.

[0118] Optionally, the apparatus further includes:

[0119] A fourth obtaining module, configured to obtain network parameters of the terrestrial mobile network when accessing the second satellite network;

[0120] A fourth switching module, configured to, when the network parameters do not meet the second network switching condition, switch from the accessed second satellite network to the accessed terrestrial mobile network.

[0121] Optionally, the network parameters include signal reception power and signal signal-to-interference-plus-noise ratio; the fourth switching module is configured to, when the signal reception power is greater than or equal to the power threshold, or the signal signal-to-interference-plus-noise ratio is greater than or equal to the signal-to-interference-plus-noise ratio threshold, switch, via a network switching switch, a third communication module that provides signal uplink service for the terminal to a first communication module, so as to switch the terminal from the accessed second satellite network to the accessed terrestrial mobile network.

[0122] Optionally, the device is further configured to obtain network parameters of the terrestrial mobile network and the signal strength of the first satellite network in response to a triggered network access request; access the terrestrial mobile network when the network parameters do not meet the second network switching condition; access the first satellite network when the network parameters meet the second network switching condition and the signal strength does not meet the first network switching condition; and access the second satellite network when the network parameters meet the second network switching condition and the signal strength meets the first network switching condition.

[0123] By using the above device, dynamic adjustment can be performed between different networks through a network switching mechanism. When the signal of the first satellite network is poor, it can be switched to the second satellite network; if the conditions of the terrestrial mobile network are appropriate, it can be switched to the terrestrial mobile network. This way of multi-network backup and switching greatly improves the stability and reliability of the communication system. Even if a certain network fails or the signal quality deteriorates, it can quickly switch to other available networks to ensure that the communication between the deep-sea and far-sea wind farms and the outside world always remains unobstructed, providing a strong guarantee for the normal operation and management of the wind farms. And by performing network switching according to network parameters and signal strength, it is possible to avoid over-investing resources on unsuitable networks, and by switching to the second satellite network or the terrestrial mobile network with better signals, while ensuring communication quality, communication resources can be reasonably utilized and operation costs can be reduced. At the same time, it can also avoid communication congestion caused by overloading of a single network and improve the resource utilization rate of the overall communication system.

[0124] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0125] The present invention further provides a terminal 400, see Figure 5 , including: a processor 401, a memory 402, and a computer program 4021 stored on the memory and executable on the processor. When the processor executes the program, it implements the network switching device of the foregoing embodiments.

[0126] The present invention further provides a readable storage medium. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device can execute the network switching device of the foregoing embodiments.

[0127] The present invention further provides a maritime communication system, see Figure 6 , including: a terminal 400, a first satellite network 501, a second satellite network 502, and a terrestrial mobile network 503; the terminal 400 is communicatively connected to the first satellite network 501, the second satellite network 502, and the terrestrial mobile network 503 respectively; the terminal 400 includes Figure 4The terminal described above.

[0128] For the apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple. For related parts, please refer to the descriptions in the method embodiments.

[0129] It should be noted that all kinds of information and data obtained in the embodiments of the present invention are obtained under the authorization of the information / data holders.

[0130] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings provided herein. Based on the above description, the structures required to construct such systems are obvious. In addition, the present invention is not directed to any specific programming language. It should be understood that the content of the present invention described herein can be implemented using various programming languages, and the descriptions of specific languages above are for disclosing the best mode of the present invention.

[0131] In the specification provided herein, a large number of specific details are set forth. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies have not been shown in detail so as not to obscure the understanding of this specification.

[0132] Similarly, it should be understood that, in order to streamline the present invention and assist in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate embodiment of the present invention.

[0133] Those skilled in the art can understand that the modules in the devices in the embodiments can be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be adopted to combine all the features disclosed in this specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise explicitly stated, each feature disclosed in this specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0134] Each component embodiment of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the sorting device according to the present invention. The present invention can also be implemented as a device or device program for executing some or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0135] It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0136] The user information involved in the present invention (including but not limited to the user's device information, user personal information, etc.), relevant data, etc. are all information authorized by the user or authorized by all parties.

[0137] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0138] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

[0139] As described above, these are only the specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or replacements, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A network switching method, characterized in that, Applied to a maritime communication system, the maritime communication system includes a first satellite network, a second satellite network, and a terrestrial mobile network; the method includes: When accessing the first satellite network, obtain the signal strength of the first satellite network and the network parameters of the terrestrial mobile network; When the signal strength meets the first network switching condition, switch to access the second satellite network; When the network parameters do not meet the second network switching condition, switch to access the terrestrial mobile network.

2. The method according to claim 1, characterized in that, The method further includes: Obtain weather information and determine a meteorological adjustment parameter according to the weather information; Adjust the second network switching condition according to the meteorological adjustment parameter.

3. The method according to claim 2, wherein The second network switching condition includes a power threshold and a signal-to-interference-plus-noise ratio threshold; The adjusting the second network switching condition according to the meteorological adjustment parameter includes: Taking the difference between the power threshold and the meteorological adjustment parameter as the adjusted power threshold; and taking the difference between the signal-to-interference-plus-noise ratio threshold and the meteorological adjustment parameter as the adjusted signal-to-interference-plus-noise ratio threshold.

4. The method according to claim 1, characterized in that The switching to access the second satellite network when the signal strength meets the first network switching condition includes: When the signal strength is less than the strength threshold, through a network switching switch, switch the second communication module providing signal uplink service for the terminal to a third communication module, so as to switch the terminal from the accessed first satellite network to the accessed second satellite network.

5. The method according to claim 1, wherein The method further includes: When accessing the terrestrial mobile network, obtain the network parameters of the terrestrial mobile network and the signal strength of the first satellite network; When the network parameters meet the second network switching condition, if the signal strength does not meet the first network switching condition, switch from the accessed terrestrial mobile network to the accessed first satellite network.

6. The method according to claim 5, wherein The network parameters include signal reception power and signal-to-interference-plus-noise ratio; the switching from the accessed terrestrial mobile network to the accessed first satellite network includes: When the signal reception power is less than the power threshold and the signal-to-interference-plus-noise ratio is less than the signal-to-interference-plus-noise ratio threshold, if the signal strength is greater than or equal to the strength threshold, through a network switching switch, switch the first communication module providing signal uplink service for the terminal to a second communication module, so as to switch the terminal from the accessed terrestrial mobile network to the accessed first satellite network.

7. The method according to claim 1, characterized in that, The method further includes: When accessing the second satellite network, obtain the network parameters of the terrestrial mobile network; When the network parameters do not meet the second network switching condition, switch from the accessed second satellite network to the accessed terrestrial mobile network.

8. The method according to claim 7, characterized in that The network parameters include signal reception power and signal-to-interference-plus-noise ratio; the switching from the accessed second satellite network to the accessed terrestrial mobile network includes: When the received signal power is greater than or equal to the power threshold, or the signal signal-to-interference-plus-noise ratio is greater than or equal to the signal-to-interference-plus-noise ratio threshold, the third communication module that provides signal uplink service for the terminal is switched to the first communication module through the network switching switch, so as to switch the terminal from the accessed second satellite network to the accessed terrestrial mobile network.

9. The method according to claim 5, wherein The method further includes: In response to a triggered network access request, obtaining network parameters of the terrestrial mobile network and the signal strength of the first satellite network; When the network parameters do not meet the second network switching condition, accessing the terrestrial mobile network; When the network parameters meet the second network switching condition and the signal strength does not meet the first network switching condition, accessing the first satellite network; When the network parameters meet the second network switching condition and the signal strength meets the first network switching condition, accessing the second satellite network.

10. A network switching device, characterized in that, Applied to a maritime communication system, the maritime communication system includes a first satellite network, a second satellite network and a terrestrial mobile network; the device includes: A first acquisition module, configured to obtain the signal strength of the first satellite network and the network parameters of the terrestrial mobile network when accessing the first satellite network; A first switching module, configured to switch to access the second satellite network when the signal strength meets the first network switching condition; A second switching module, configured to switch to access the terrestrial mobile network when the network parameters do not meet the second network switching condition.

11. A terminal, characterized in that, It includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 9 are implemented.

12. A readable storage medium, characterized in that, When the instructions in the readable storage medium are executed by the processor of the terminal, the terminal is enabled to execute the method according to any one of claims 1-9.

13. A maritime communication system, characterized in that, The maritime communication system includes a terminal, a first satellite network, a second satellite network and a terrestrial mobile network; the terminal is respectively communicatively connected to the first satellite network, the second satellite network and the terrestrial mobile network; the terminal includes the terminal according to claim 11.

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