A network bearer-based automatic switching method and system

Abstract

The application provides a network bearing-based automatic switching method and system, fuses 4G LTE base station service and 5G base station service physical transmission channels through city IP bearing network and provincial center IP bearing network, provides strong dual network multiple scene redundancy protection for the base station service, realizes network automatic switching when networking appears abnormity, and ensures normal base station data transmission. The base station service is accessed to the local city IP bearing network, base station service flow can be guided to each city for bearing transmission, Gn flow of the current traditional centralized machine room can be shared, detour flow is reduced, and equipment load is reduced.

Description

Technical Field

[0001] This invention belongs to the field of network transmission and bearer technology, and particularly relates to an automatic switching method and system based on network bearer. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The services of existing 4G LTE base stations are carried by Packet Transport Network (PTN). PTN supports various bidirectional point-to-point connection channels based on packet switching services, and has end-to-end networking capabilities suitable for various coarse and fine-grained services. It provides a "flexible" transmission channel suitable for the characteristics of IP services. PTN has rich protection methods and can achieve carrier-grade service protection switching based on 50ms when encountering network failures, realizing transmission-level service protection and recovery.

[0004] Existing 5G base station services rely on SPN (Slicing Packet Network) to access the IP bearer network for transmission. The IP bearer network is a dedicated network built using IP technology to carry services with high transmission quality requirements. It employs a dual-plane, dual-satellite, dual-homing high-reliability design and possesses high redundancy protection characteristics. Specific protection schemes include device-level protection and network-level protection. Device-level protection includes dual-machine hot standby, dual master control, dual power supply, and port trunk line (trunk) protection. Network-level protection includes MC-PW APS protection for Layer 2 networks and FRR+BFD detection / MPLS OAM protection for Layer 3 networks. The IP bearer network provides a robust guarantee of reliability and security for service transmission.

[0005] Existing 4G LTE base station services are transmitted across cities via PTN networks, and service operation protection is achieved through transmission-level protection based on the PTN network. Each 4G LTE base station's services access the local PTN, then converge to the provincial backbone PTN for forwarding, and finally connect to the provincial center's IP bearer network CE equipment, enabling interoperability between the 4G LTE base station and the provincial center's cloud-based EPC and AMF. In extreme scenarios, PTN hardware failures leading to PTN node failures, PTN bidirectional link failures preventing ring protection of services, and local data configuration failures hindering service handover, will directly cause routing interruptions between the city-level 4G core network and the provincial center's core network, resulting in a complete disruption of 4G core network services in the city. Therefore, improving network reliability and ensuring normal base station data transmission has become an urgent problem to solve. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this invention provides an automatic switching method and system based on network bearer. It physically connects 4G and 5G wireless base stations through an IP bearer network, enabling automatic network switching when network anomalies occur, ensuring the normal transmission of base station data. Moreover, by using the method of base station service access to the local city IP bearer network, the base station service traffic can be diverted to various cities for transmission, reducing detour traffic and lowering equipment load.

[0007] To achieve the above objectives, a first aspect of the present invention provides an automatic handover method based on network bearer, comprising:

[0008] 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively.

[0009] The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network.

[0010] When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery.

[0011] A second aspect of the present invention provides an automatic handover system based on network bearer, comprising:

[0012] Access module: 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively;

[0013] Routing control module: The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network.

[0014] Automatic switching module: When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery.

[0015] A third aspect of the present invention provides a computer device, comprising: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the computer device is running, the processor communicates with the memory via the bus, and when the machine-readable instructions are executed by the processor, an automatic switching method based on a network bearer is performed.

[0016] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, performs an automatic switching method based on a network bearer.

[0017] The above one or more technical solutions have the following beneficial effects:

[0018] In this invention, the physical transmission channels for 4G LTE base station services and 5G base station services are integrated through the municipal IP bearer network and the provincial central IP bearer network. This provides robust dual-network redundancy protection for base station services across multiple scenarios, enabling automatic network switching in the event of network anomalies and ensuring normal data transmission from base stations. By using the local municipal IP bearer network for base station services, base station service traffic can be diverted to various municipalities for transmission, thus alleviating the burden of traditional centralized equipment room traffic, reducing detours, and lowering equipment load.

[0019] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a schematic diagram of the LTE base station service traffic flow in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the service protection implementation steps in Embodiment 1 of the present invention;

[0023] Figure 3 This is a diagram showing the distribution of service protection implementation steps in Embodiment 1 of the present invention;

[0024] Figure 4 This is a flowchart of the base station service network protection switching process in Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of dual network protection for base station services in Embodiment 1 of the present invention;

[0026] Figure 6 To utilize the solution of Embodiment 1 of this invention, the path from the network cloud CE to the local base station address is shown in the hop diagram 9.

[0027] Figure 7 The base station address path 7 hop diagram after implementing the scheme of the present invention;

[0028] Figure 8This diagram illustrates that the address path from the network cloud CE to the local base station remains consistent with the path before implementation of the present invention after using the solution of Embodiment 1. Detailed Implementation

[0029] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0031] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0032] Terminology Explanation:

[0033] CE: Customer Edge, user network edge device;

[0034] AR: Access router;

[0035] AR is the upper-layer device of CE, responsible for aggregating and forwarding routing data from CE devices.

[0036] Example 1

[0037] This embodiment discloses an automatic handover method based on network bearer, including:

[0038] 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively.

[0039] The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network.

[0040] When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery.

[0041] like Figure 1As shown, this embodiment proposes an automatic handover method based on network bearer, which integrates the high-reliability channels of 4G base station services and 5G base station services to achieve more secure and reliable service transmission. Specifically, while 4G LTE base station services access the Packet Transport Network (PTN) network, they also access the Slicing Packet Network (SPN) to transmit to the local IP bearer network. The local IP bearer network, through the division of Virtual Private Networks (VPNs), publishes more detailed routing control, prioritizing the 4G LTE base station services to be carried through the local IP bearer network. This improves the synergy between the transmission and bearer networks without increasing the load, achieving 4G and 5G channel integration while adding an important layer of network system protection for services. The IP bearer network can provide a strong guarantee of reliability and security for base station services. However, in extreme cases, when the IP bearer network experiences a dual-plane failure, such as simultaneous uplink interruption or simultaneous downtime of paired devices, the IP bearer network cannot carry services normally, and the network will automatically switch over. Base station services can still rely on the PTN network for normal transmission.

[0042] The automatic switching proposal in this embodiment involves device-level protection for transmission PTN devices, SPN devices, dual CE devices in the IP bearer network, two pairs of CE devices at different local addresses, dual AR devices at different local addresses, and dual CR devices at different local addresses. All of these are redundant backup relationships, and the failure of a single device will not affect the normal transmission of services. The network-level protection involves transmission networks (local PTN network, provincial backbone PTN network) and IP bearer networks (municipal IP bearer networks, provincial center IP bearer networks, backbone IP bearer networks). If a single network fails, services will automatically switch to the backup network bearer, without affecting the normal transmission of services.

[0043] Combination Figure 2 This embodiment provides a detailed description of an automatic handover method based on network bearer:

[0044] Step 1: The 4G wireless base station connects to the local PTN device for access, enabling basic-level access to base station data;

[0045] Step 2: 4G base station data is aggregated from the local PTN network to the provincial backbone PTN, and the provincial backbone PTN transmits the data to the provincial center IP bearer network through a bidirectional point-to-point connection channel based on packet switching services.

[0046] Step 3: The provincial center PTN equipment connects to the provincial center IP bearer network CE equipment, and the provincial center IP bearer network CE equipment publishes the aggregation base station routing network segment to the provincial center IP bearer network AR equipment by dividing the virtual private network (VPN).

[0047] Step 4: Simultaneously, the cloud-based EPC and AMF network elements (core network) in the provincial center network cloud on the other end are connected to the provincial center IP bearer network cloud CE. Similarly, the routing network segment is published to the provincial center IP bearer network AR device through the division of the virtual private network VPN, and then the base station is interconnected with the provincial center cloud-based EPC and AMF through the core CR device of the provincial center IP bearer network.

[0048] Among them, the network cloud is established in the provincial center and connected to the provincial center's IP bearer network.

[0049] Step 5: The 4G base station connects to the local PTN device for access. While it is aggregated to the provincial backbone PTN network, the local PTN accesses the local SPN network, and the 5G base station accesses the local SPN device, thereby realizing the integration of the physical channel of the 5G base station service.

[0050] Step 6: In the local SPN network, each city connects to the local IP bearer network CE equipment through two core sites. Isolation from 5G services is achieved by dividing dedicated VLAN interfaces. Detailed routing network segment data of base stations and cloud-based EPC and AMF routes of the provincial center core network are created to achieve bidirectional interconnection.

[0051] Step 7: The local city IP bearer network CE publishes detailed base station routing segments to the backbone IP bearer network by dividing the VPN. Through dynamic routing protocols, it learns the routing segments of the provincial center core network cloud EPC and AMF, thereby realizing bidirectional interconnection between the city base station and the provincial center core network cloud EPC and AMF.

[0052] It should be noted that the backbone IP bearer network includes the provincial center IP bearer network, and the backbone IP bearer network is a network that is interconnected with both the provincial center IP bearer network and the municipal IP bearer network.

[0053] like Figure 3 As shown in this automatic handover proposal, eNB represents 4G base station services, and gNB represents 5G base station services; PTN network equipment includes access PTN responsible for access, aggregation PTN responsible for aggregation, and provincial backbone PTN responsible for forwarding; SPN network equipment includes access equipment, core scheduling equipment, and core landing equipment connecting to the bearer network CE; IP bearer network equipment includes provincial center PTN-CE connecting to the provincial backbone PTN and provincial capital city SPN, city PTN-CE connecting to the city SPN, UPF private network CE connecting to the city core network UPF, network cloud CE connecting to the network cloud core network EPC and AMF, AR equipment that aggregates and forwards CE routing data, and core CR equipment that aggregates and forwards AR routing data.

[0054] Normally, at the backbone level of the IP bearer network, since the city-level CEs have released more detailed base station routing segments, when the provincial center's cloud-based EPC and AMF go to the city-level base station, they will be matched with detailed routing segments according to the routing selection principle. The data will be forwarded to the city-level CE through the backbone IP bearer network, and then passed to the SPN and the city-level base station again. This path for transmitting base station data services does not depend on the provincial backbone PTN network, but is carried solely by the IP bearer network. Only when the IP bearer network is abnormal may the data transmission path automatically switch.

[0055] When a link or device malfunctions, this automatic handover method will automatically perform protection handover according to six handover rules:

[0056] Switching Rule 1: If a single CE at a single site (node) of the municipal IP bearer network fails, the network will automatically switch over within the municipal IP bearer network due to the redundancy protection feature of the municipal IP bearer network. The traffic carried by the dual CEs at the single site will be carried by the normal single CE at the same site, so that the base station services can be transmitted normally through the backbone layer of the IP bearer network.

[0057] Switching Rule 2: If a single CE fails in one of the two local IP bearer network sites, the system will automatically switch within the IP bearer network based on the redundancy protection features of the local IP bearer network. All traffic carried by the dual CEs of each site will be carried by the single CE that is functioning normally in its respective site, thus enabling base station services to be transmitted normally through the backbone layer of the IP bearer network.

[0058] Switching Rule 3: When a single site in the municipal IP bearer network fails with dual CEs, the system automatically switches within the municipal IP bearer network based on the dual site access protection feature of the SPN network. All traffic from the failed site is carried by the dual CEs of the normal site, enabling 4G LTE base station services to be transmitted normally through the IP bearer network backbone.

[0059] Switching Rule 4: If the first site of the municipal IP bearer network experiences a dual CE failure and the second site experiences a single CE failure, the system will automatically switch within the IP bearer network by relying on the dual site access of the SPN network and the redundancy protection features of the municipal IP bearer network. All traffic from both sites will be carried by a single, normal CE at the first site, enabling 4G LTE base station services to be transmitted normally through the backbone layer of the IP bearer network.

[0060] Switching Rule 5: When the dual-site dual-CE failure of the municipal IP bearer network causes the detailed routes of the municipal 4G LTE base stations to fail, the routes at the backbone level of the IP bearer network converge. The provincial center's cloud-based EPC and AMF select the aggregation base station route network segment published by the provincial center's CE equipment to reach the municipal 4G LTE base stations, triggering automatic switching between the municipal IP bearer network and the transmission PTN network, so that 4G LTE base station services can be transmitted through the provincial backbone PTN layer.

[0061] Switching Rule 6: When the dual AR of the municipal IP bearer network fails, the detailed routes of the municipal base stations become invalid. The routes at the backbone level of the IP bearer network converge. The provincial center's cloud-based EPC and AMF select the aggregation base station route network segment published by the provincial center's CE equipment to reach the municipal base stations, triggering automatic switching between the municipal IP bearer network and the transmission PTN network, so that base station services can be transmitted through the provincial backbone PTN layer.

[0062] like Figure 4 As shown, when a base station service transmission anomaly occurs, fault determination is performed in six steps. Different determination results will be handled according to the six-level handover rules for network protection. The specific process is as follows:

[0063] Step 1: Determine if the problem is caused by an IP bearer network failure. If not, perform other network troubleshooting and processing until service transmission is restored to normal. If so, initiate the network protection switching method described in this article.

[0064] Step 2: After initiating network protection switching, determine whether only a single CE has failed. If so, perform network switching according to the switching rule 1 above; otherwise, determine whether both CEs have failed.

[0065] Step 3: Determine if there is a dual CE failure. If there is a single CE failure at both sites, then perform network switching according to the above switching rule 2. If there is a dual CE failure at a single site, then perform network switching according to the above switching rule 3. If there is no dual CE failure, then determine if there is a failure of all three CEs.

[0066] Step 4: Determine if all three CE units are faulty. If so, perform network switching according to the above switching rule 4; otherwise, determine if all four CE units are faulty.

[0067] Step 5: Determine if there is a fault in all four CE units at the same location. If so, perform network switching according to the above switching rule 5. If not, determine if there is a fault in both AR units in the same city.

[0068] Step 6: Determine if there is a dual AR fault in the same city. If so, switch networks according to the above switching rule 6; otherwise, perform other network troubleshooting.

[0069] At the same time, there is a certain correlation between the six-level handover rules. When other conditions occur on the basis of a single handover rule, the network protection of other handover rules will be triggered.

[0070] The six-level switching rules and their constraints are detailed in the table below.

[0071]

[0072] When a single-site single-CE failure occurs in the base station service transmission network, handover rule one will be triggered; when a single-site single-CE failure occurs in the network, or when a single-site single-CE failure occurs in addition to handover rule one, handover rule two will be triggered; when a single-site double-CE failure occurs in the network, or when another CE failure occurs in the same site in addition to handover rule one, or when a double-CE failure occurs in one site and the other site recovers to normal in addition to handover rule two, handover rule three will be triggered; when a network has three CE failures in two sites, or when a double-CE failure occurs in another site in addition to handover rule one, or when a single-site second CE failure occurs in addition to handover rule two, or when a single-site single-CE failure occurs in another site in addition to handover rule three, handover rule four will be triggered; when a network has two CE failures in two sites, or when three other CE failures occur simultaneously in addition to handover rule one, or when two other CE failures occur simultaneously in addition to handover rule two, or when a double-CE failure occurs in another site in addition to handover rule three, or when the remaining CE failure occurs in addition to handover rule four, handover rule five will be triggered; when a network has two AR failures in the same city, handover rule six will be triggered.

[0073] After verification, the current 4G and 5G N2 and N3 traffic in a single city is less than 1G, which is far lower than the 40G bandwidth of the city's SPN and IP bearer network exit. Therefore, all six switching rules can be switched automatically without the need for manual traffic diversion.

[0074] As shown in the figure above, this automatic handover method uses six handover rules to enable base station services to be transmitted through the IP bearer network. Under normal circumstances and in handover rules one, two, three, and four, network protection handover is achieved within the IP bearer network. In handover rules five and six, automatic handover between networks is achieved through the collaboration of the IP bearer network and the transmission PTN network, thereby realizing automatic protection handover of the base station service data transmission network under six abnormal scenarios.

[0075] In this embodiment, the physical transmission channels of 4G LTE base station services and 5G base station services are integrated to provide strong dual network redundancy protection for base station services in multiple scenarios, enabling automatic network switching when network anomalies occur, and ensuring the normal transmission of base station data.

[0076] In this embodiment, when a base station service malfunctions, a fault diagnosis is performed in six steps, and network protection is carried out according to a six-level switching rule based on different diagnosis results.

[0077] In this embodiment, when a link or device malfunctions, automatic protection switching is performed according to six switching rules.

[0078] This embodiment combines the existing PTN network transmission-level protection methods with the high reliability and high redundancy protection characteristics of the IP bearer network. Through the mutual coordination between basic networks, it achieves the fusion of the physical transmission channels of 4G LTE base station services and 5G base station services without increasing network load. This not only provides base station services with a more powerful dual-network redundancy protection effect for multiple scenarios, but also reduces the impact of faults, greatly improves user satisfaction, and promotes the evolution of 4G / 5G converged networks.

[0079] This embodiment adopts the method of base station service access to the local city IP bearer network, which can divert base station service traffic to various cities for transmission and transmission. It can share the Gn traffic of the current traditional centralized equipment room, reduce detour traffic, and reduce equipment load, which is of milestone significance.

[0080] By reducing costs and increasing efficiency, and utilizing existing IP bearer network and packet transport network (PTN) resources, and through adjustments and optimizations to base station service routing on the IP bearer network and PTN equipment, city-level disaster recovery capabilities for core network services can be achieved, promoting the evolution of 4G / 5G converged networks. The 4G and 5G core network N2 and N3 have low traffic and low bandwidth requirements, requiring no additional expansion investment, and are highly portable and deployable. Simultaneously, this proposal can serve as a disaster recovery backup solution for 5G core network services, establishing a PTN network service channel for 5G core network services to effectively prevent and supplement IP bearer network failures, enhancing network robustness, comprehensively improving user experience, reducing complaints, and increasing user satisfaction and loyalty. It has broad commercial application value in network operation and maintenance and customer operations.

[0081] During the implementation of this solution, the routing of 4G LTE base station services exhibits significant path changes through MPLS OAM, as detailed below:

[0082] like Figure 5 As shown, before the proposal is implemented, the path from the network cloud CE to the local base station address is 9 hops.

[0083] Analysis of the service transmission path reveals that the third hop is the provincial center IP bearer network PTN-CE, the fourth hop is the provincial backbone PTN equipment, and the base station service transmission path is: municipal PTN-provincial backbone PTN-provincial center IP bearer network CE-IP bearer network backbone-network cloud core network.

[0084] like Figure 6 As shown, after the proposal operation is implemented, the base station address path is 7 hops.

[0085] Analysis of the service transmission path reveals that the third hop is the municipal IP bearer network PTN-CE, the fourth hop is the municipal SPN equipment, and the base station service transmission path is municipal SPN-municipal IP bearer network CE-IP bearer network backbone-network cloud core network.

[0086] like Figures 7-8 As shown, during the proposal operation, network switching was performed on the base station service transmission path to further verify the collaborative protection of the dual networks. The address path from the network cloud CE to the local base station was consistent with that before the operation was implemented.

[0087] The verification data shows that the base station service to the core network route is reachable before and after the implementation of the proposal. The service flow path can be analyzed to show that the service is automatically switched from the original transmission network to the IP bearer network, and the number of hops is further reduced.

[0088] Example 2

[0089] The purpose of this embodiment is to provide an automatic handover system based on network bearer, including:

[0090] Access module: 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively;

[0091] Routing control module: The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network.

[0092] Automatic switching module: When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery.

[0093] Example 3

[0094] The purpose of this embodiment is to provide a computing device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the above-described method.

[0095] Example 4

[0096] The purpose of this embodiment is to provide a computer-readable storage medium.

[0097] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the steps of the above method.

[0098] The steps and methods involved in the apparatuses of Embodiments 2, 3, and 4 above correspond to those in Embodiment 1. For specific implementation details, please refer to the relevant description section of Embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood as including any medium capable of storing, encoding, or carrying an instruction set for execution by a processor and enabling the processor to perform any of the methods in this invention.

[0099] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0100] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An automatic handover method based on network bearer, characterized in that, include: 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively. The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network. When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery. When a link or device malfunctions, this automatic switching method will automatically perform protection switching according to six switching rules: Rule 1: If a single CE at a single location in the municipal IP bearer network fails, the system will automatically switch within the municipal IP bearer network based on the redundancy protection features of the municipal IP bearer network. Traffic carried by dual CEs at a single location will be carried by the normal single CE at that location. Rule 2: If a single CE at two locations in the municipal IP bearer network fails, the system will automatically switch within the IP bearer network based on the redundancy protection features of the municipal IP bearer network. All traffic carried by dual CEs at each location will be carried by the normal single CE at each location. Rule 3: If a single-site dual-CE failure occurs in the municipal IP bearer network, the network will automatically switch over within the municipal IP bearer network due to the SPN network's dual-site access protection feature. All traffic from the failed site will be carried by the normal dual-CE units at the normal site. Rule 4: If the first site in the municipal IP bearer network experiences a dual-CE failure, and the second site experiences a single-CE failure, the network will automatically switch over within the IP bearer network due to the SPN network's dual-site access and the municipal IP bearer network's redundancy protection feature. All traffic from both sites will be carried by the normal single-CE unit at the first site. Rule 5: If both sites in the municipal IP bearer network experience a dual-CE failure, the municipal 4G network will automatically switch over within the IP bearer network due to the SPN network's dual-site access and the municipal IP bearer network's redundancy protection feature. When the detailed route of an LTE base station fails, the backbone route of the IP bearer network converges. The provincial center's cloud-based EPC and AMF select the aggregation base station route segment published by the provincial center's CE equipment to reach the municipal 4G LTE base station, triggering an automatic switch between the municipal IP bearer network and the transmission PTN network. Rule 6: When the dual AR of the municipal IP bearer network fails, the detailed route of the municipal base station fails, the backbone route of the IP bearer network converges, and the provincial center's cloud-based EPC and AMF select the aggregation base station route segment published by the provincial center's CE equipment to reach the municipal base station, triggering an automatic switch between the municipal IP bearer network and the transmission PTN network.

2. The automatic handover method based on network bearer as described in claim 1, characterized in that, 4G and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, specifically as follows: 4G wireless base station data is transmitted sequentially through the local packet transmission network and the provincial backbone packet transmission network to the user network edge equipment of the provincial center IP bearer network. The user network edge equipment of the provincial center's IP bearer network publishes 4G wireless base station routing network segments to the AR equipment of the provincial center's IP bearer network by dividing the virtual private network (VPN); The core network elements of the provincial center connect to the user network edge devices of the provincial center IP bearer network. The core network elements of the provincial center publish 4G wireless base station routing network segments to the AR devices of the provincial center IP bearer network by dividing the virtual private network (VPN). 5G wireless base stations are connected to the provincial center core network sequentially through the local slice packet network and the user network edge equipment of the municipal IP bearer network. The user network edge devices of the municipal IP bearer network publish 5G wireless base station routing network segments to the provincial center IP bearer network by dividing virtual private networks (VPNs).

3. The automatic handover method based on network bearer as described in claim 1, characterized in that, The local slice packet network connects to the user network edge devices of the municipal IP bearer network through two core nodes.

4. The automatic handover method based on network bearer as described in claim 1, characterized in that, When a link or device fails within the municipal IP bearer network, if a single node and single CE device in the municipal IP bearer network fails, the network will automatically switch over based on the redundancy protection feature of the IP bearer network. The traffic carried by the single node dual CE device will be carried by the node's normal single CE device. When a link or device fails within the municipal IP bearer network, if a dual-node single CE device in the municipal IP bearer network fails, the network will automatically switch over based on the redundancy protection feature of the IP bearer network. All traffic carried by the dual CE devices of each node will be carried by the single CE device of its own node that is functioning normally.

5. The automatic handover method based on network bearer as described in claim 1, characterized in that, When a link or device fails within the municipal IP bearer network, if a single node dual CE device in the municipal IP bearer network fails, the network will automatically switch over within the IP bearer network based on the dual-node access protection feature of the SPN network. All traffic from the faulty node will be carried by the dual CE device of the normal node.

6. The automatic handover method based on network bearer as described in claim 1, characterized in that, When a link or device fails within the municipal IP bearer network, if the dual CE devices of the first node and the single CE device of the second node fail, the network will automatically switch over within the IP bearer network based on the dual-node access of the SPN network and the redundancy protection features of the IP bearer network. All traffic from the dual nodes will be carried by the normal single CE device of the first node.

7. The automatic handover method based on network bearer as described in claim 1, characterized in that, When a link or device in the municipal IP bearer network fails, if the dual-node dual-CE device of the municipal IP bearer network fails, the detailed route of the municipal 4G LTE base station will fail. The IP bearer network backbone layer route will converge. The provincial center cloud EPC and AMF will select the aggregation base station route network segment published by the provincial center CE device to go to the municipal 4G LTE base station, triggering automatic switching between the IP bearer network and the transmission PTN network. When a link or device in the municipal IP bearer network fails, if the municipal IP bearer network has a dual AR failure, the detailed route of the municipal base station will be invalid. The route at the backbone level of the IP bearer network will converge. The provincial center cloud EPC and AMF will select the aggregation base station route segment published by the provincial center CE equipment to go to the municipal base station, triggering automatic switching between the IP bearer network and the transmission PTN network.

8. An automatic handover system based on network bearer, characterized in that, Used to implement an automatic handover method based on network bearer as described in any one of claims 1-7; Access module: 4G wireless base stations and 5G wireless base stations are connected to the provincial center's IP bearer network through the municipal IP bearer network, respectively; Routing control module: The municipal IP bearer network publishes routing control by dividing virtual private networks. According to the published routing control, the services of 4G wireless base stations and 5G wireless base stations are given priority to be carried by the municipal IP bearer network. Automatic switching module: When a link or device fails within the municipal IP bearer network, the base station service transmission path automatically switches between the municipal IP bearer network and the packet transmission network to ensure service delivery.

9. A computer device, characterized in that, include: The computer device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the computer device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, an automatic switching method based on a network bearer as described in any one of claims 1 to 7 is performed.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, performs an automatic handover method based on a network bearer as described in any one of claims 1 to 7.

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