CN116599577A - Non-perception route switching method - Google Patents

Abstract

The present invention relates to the technical field of network communication, in particular to a non-perceptual routing switching method, comprising: deploying MEC between a base station and a transmission device, using the MEC to transmit data from the base station to the transmission device; monitoring the working status of the MEC, the working status includes normal state and abnormal state; according to the working state of the MEC, switch the corresponding network channel to transmit the service request sent by the service terminal to the user intranet; in order to further enhance security and ensure the stable and normal operation of the network, when the MEC is in good condition, the service sent by the service terminal The transmission path of the request is the service terminal, CPE, base station, router, and user intranet; when the MEC is damaged, the transmission path of the service request sent by the service terminal is the service terminal, CPE, base station, transmission equipment, core network, APN server, router, User intranet; the present invention can switch the network channel for transmitting data when the MEC is damaged, so as to ensure communication security.

Description

A non-aware routing switching method

technical field

The invention relates to the technical field of network communication, in particular to a non-perceptual routing switching method.

Background technique

MEC stands for Mobile Edge Computing. By providing IT and cloud computing capabilities for the wireless access network, localized services and short-distance deployment become possible, thereby enabling the wireless network to have low-latency, high-bandwidth transmission capabilities and backhaul bandwidth requirements. The reduction greatly reduces the operating cost.

At present, the network system based on miniMEC is also adopted in many hospitals. The miniMEC adopts the structure of direct connection of optical fiber to the base station, and is placed between the base station and the transmission equipment. It adopts a series structure to realize data transmission. Once the MEC is damaged, data cannot be transmitted, affecting user experience.

Contents of the invention

The purpose of the present invention is to provide a non-aware routing switching method, which can switch the network channel for transmitting data when the MEC is damaged, so as to ensure communication security.

In order to achieve the above object, the present invention provides a non-aware routing switching method, including:

Deploy MEC between the base station and transmission equipment, and use MEC to transmit data from the base station to the transmission equipment;

Monitor the working status of the MEC, the working status includes normal status and abnormal status;

According to the working state of the MEC, the corresponding network channel is switched to transmit the service request sent by the service terminal to the user intranet.

Wherein, the concrete steps of described monitoring the working status of MEC include:

Deploy optical bypass protection OBP between the base station and transmission equipment;

The optical bypass protection OBP sends a ping packet to the firewall through the MEC. If the ping packet can be successfully forwarded to the intranet normally, it is judged as a normal state. If the ping packet is unsuccessful, it is judged as an abnormal state.

Wherein, according to the working state of the MEC, the specific steps of switching the corresponding network channel to transmit the service request sent by the service terminal to the user intranet include:

Obtain the working status of the MEC;

When the working state of the MEC changes from a normal state to an abnormal state, control the network channel of the current routing device to switch from the first network channel to the second network channel, and send network channel switching information to the remaining routing devices, so that all The remaining routing device switches the network channel between itself and the current routing device from the first network channel to the second network channel according to the network channel switching information.

Wherein, the network channel switching information includes the working status of the MEC.

Wherein, after sending the network channel switching information to the remaining routing devices, it also includes:

Detecting whether the current routing device has received response information fed back by the remaining routing devices;

When the current routing device does not receive the response information, repeatedly send network channel switching information to the remaining routing devices until the remaining routing devices receive the network channel switching information;

When the current routing device receives the response information, stop sending network channel switching information to the remaining routing devices.

Wherein, the response information is information fed back by the other routing devices after successfully receiving the network channel switching information.

Wherein, the transmission path of the service request sent by the first network channel to the service terminal is the service terminal, CPE, base station, router, and user intranet; the transmission path of the service request sent by the second network channel to the service terminal is the service Terminal, CPE, base station, transmission equipment, core network, APN server, router, user intranet.

A non-perceptual routing switching method of the present invention, in order to further enhance security and ensure stable and normal operation of the network, a large-scale network support scheme is added to ensure the normal operation of services when the MEC system is completely damaged, and realize "uninterrupted services". ", the large network underpinning solution only takes effect when the MEC is damaged and cannot be routed into the user's intranet through the MEC. When the MEC is intact (that is, the working state of the MEC is normal), data routing: service terminal-CPE-base station-router-user intranet; MEC damage (that is, the working state of the MEC is abnormal): data routing : Service Terminal-CPE-Base Station-Transmission Equipment-Core Network-APN Server-Router-User Intranet. When a large network is used, it will exist in the NAT Server scenario (server mapping). If it is multi-outlet, when returning a packet, the device will look up the outgoing interface of the server response message according to the routing table, and the request message may appear from the MEC1 enters, and the server responds to the situation that the message is returned from the APN. The inconsistency of the round-trip path may cause problems such as slow access speed or service interruption. Entering the firewall, the firewall will establish a session (forward session) and forward the message; at the same time, the firewall will also generate a reverse session, in which the incoming interface of the message will be used as the outgoing interface of the reverse session . After the firewall receives the response message returned by the server (assuming that the inbound interface is configured with the function of source-in and source-out), it forwards it directly according to the outbound interface of the reverse session table. (As long as the firewall enables the function of source in and source out, it will take effect for all packets, while the router will only take effect for natserver, because the firewall is based on the session forwarding mechanism, and the router is based on route forwarding by default, and the corresponding session table does not take effect. In the case of natserver, a session table will be generated, so the router will only take effect for natserver.) After enabling this function, the return packet received by the business terminal only has a change in the return route, and no operation is required to achieve no perception Routing switch.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flowchart of a non-perceptual route switching method of the present invention.

Fig. 2 is a flow chart of monitoring the working state of the MEC in the present invention.

Fig. 3 is a flow chart of switching the corresponding network channel to transmit the service request sent by the service terminal to the user intranet according to the working state of the MEC in the present invention.

Fig. 4 is a schematic diagram of the network system of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

Referring to Figures 1 to 4, the present invention provides a non-aware routing switching method, including:

S1 deploys MEC between the base station and transmission equipment, and uses MEC to transmit data from the base station to the transmission equipment;

S2 monitors the working state of the MEC, and the working state includes a normal state and an abnormal state;

Specific steps include:

S21 deploying optical bypass protection OBP between the base station and the transmission equipment;

S22 The optical bypass protection OBP sends a ping packet to the firewall through the MEC. If the ping packet can be successfully forwarded to the internal network normally, it is judged as a normal state. If the ping packet is unsuccessful, it is judged as an abnormal state;

miniMEC adopts an optical fiber direct-connected base station architecture, placed between the base station and transmission equipment, and adopts a series structure. In order to ensure the security of the large network, optical bypass protection (OBP) is used to protect the large network. Normally, the optical bypass protection OBP sends a ping packet to the firewall through the MEC. If the ping is successful, the ping packet can be forwarded to the intranet normally. If it fails, the optical bypass protection OBP considers that the MEC is not working normally, and judges it as an abnormal state.

Optical bypass protection (OBP) is an automatic monitoring and automatic switching protection system completely established on the physical link of the optical cable, which is independent of the communication transmission system. Therefore, various functional units such as optical switch, optical splitter, optical detection and heartbeat monitoring should be integrated inside, and the single board supports one or two-way bypass protection. It is suitable for bypass protection in case of power interruption, hardware failure, software deadlock, etc. in the optical network node equipment, ensuring that the normal signal transmission is not affected. It has the characteristics of independent transparent transmission, high reliability, high stability, and fast fault protection. Optical bypass protection OBP has high integration, low insertion loss, and supports hot plugging; adapts to a wide wavelength range, low insertion loss, low crosstalk, and fast switching speed; adopts transparent transmission, high stability, high reliability, and supports wireless Diversified heartbeat mode of optical locking, which can be controlled independently or in groups; realize dual-channel bypass protection, and each channel can work independently to support mirror monitoring; support multiple protection methods: 1:1 bypass protection, 1+1 bypass The protection can realize remote management of the network through the network management card; with the help of professional customization, an optical fiber fault automatic test protection system of optical switch + OTDR module + OLP module can be established, and automatic visual fiber fault test and information display can be realized through SMS and mobile phone APP. Line protection improves mini-MEC failure repair timeliness and communication security.

S3 switches the corresponding network channel to transmit the service request sent by the service terminal to the user intranet according to the working state of the MEC;

S31 acquires the working status of the MEC;

S32 When the working state of the MEC changes from a normal state to an abnormal state, control the network channel of the current routing device to switch from the first network channel to the second network channel, and send network channel switching information to other routing devices, so that The other routing devices switch the network channel between themselves and the current routing device from the first network channel to the second network channel according to the network channel switching information;

Wherein, the transmission path of the service request sent by the first network channel to the service terminal is the service terminal, CPE, base station, router, and user intranet; the transmission path of the service request sent by the second network channel to the service terminal is the service Terminal, CPE, base station, transmission equipment, core network, APN server, router, user intranet.

The network channel switching information includes the working status of the MEC. After sending the network channel switching information to other routing devices, it also includes:

Detecting whether the current routing device has received response information fed back by the remaining routing devices;

When the current routing device does not receive the response information, repeatedly send network channel switching information to the remaining routing devices until the remaining routing devices receive the network channel switching information;

When the current routing device receives the response information, stop sending network channel switching information to the remaining routing devices.

The response information is information fed back by the other routing devices after successfully receiving the network channel switching information.

A non-perceptual routing switching method of the present invention, in order to further enhance security and ensure stable and normal operation of the network, a large-scale network support scheme is added to ensure the normal operation of services when the MEC system is completely damaged, and realize "uninterrupted services". ", the large network underpinning solution only takes effect when the MEC is damaged and cannot be routed into the user's intranet through the MEC. When the MEC is intact (that is, the working state of the MEC is normal), data routing: service terminal-CPE-base station-router-user intranet; MEC damage (that is, the working state of the MEC is abnormal): data routing : Service Terminal-CPE-Base Station-Transmission Equipment-Core Network-APN Server-Router-User Intranet. When a large network is used, it will exist in the NAT Server scenario (server mapping). If it is multi-outlet, when returning a packet, the device will look up the outgoing interface of the server response message according to the routing table, and the request message may appear from the MEC1 enters, and the server responds to the situation that the message is returned from the APN. The inconsistency of the round-trip path may cause problems such as slow access speed or service interruption. Entering the firewall, the firewall will establish a session (forward session) and forward the message; at the same time, the firewall will also generate a reverse session, in which the incoming interface of the message will be used as the outgoing interface of the reverse session . After the firewall receives the response message returned by the server (assuming that the inbound interface is configured with the function of source-in and source-out), it forwards it directly according to the outbound interface of the reverse session table. (As long as the firewall enables the function of source in and source out, it will take effect for all packets, while the router will only take effect for natserver, because the firewall is based on the session forwarding mechanism, and the router is based on route forwarding by default, and the corresponding session table does not take effect. In the case of natserver, a session table will be generated, so the router will only take effect for natserver.) After enabling this function, the return packet received by the business terminal only has a change in the return route, and no operation is required to achieve no perception Routing switch.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (7)

1. The method for switching the non-aware route is characterized by comprising the following steps:

the MEC is deployed between the base station and the transmission equipment, and the MEC is adopted to transmit the base station data to the transmission equipment;

monitoring the working state of the MEC, wherein the working state comprises a normal state and an abnormal state;

and switching corresponding network channels according to the working state of the MEC to transmit the service request sent by the service terminal to the user intranet.

2. A method for non-aware route switching according to claim 1, wherein,

the specific steps for monitoring the working state of the MEC comprise:

deploying Optical Bypass Protection (OBP) between the base station and the transmission equipment;

the optical bypass protection OBP initiates a ping packet to the firewall through the MEC, if normal ping is successful, the ping packet can be forwarded to the intranet normally, the normal state is judged, and if the ping packet is unsuccessful, the abnormal state is judged.

3. A method for non-aware route switching according to claim 2,

the specific steps of switching the corresponding network channel to transmit the service request sent by the service terminal to the user intranet according to the working state of the MEC include:

acquiring the working state of the MEC;

when the working state of the MEC is changed from a normal state to an abnormal state, the network channel of the current routing equipment is controlled to be switched from a first network channel to a second network channel, and network channel switching information is sent to other routing equipment, so that the other routing equipment switches the network channel of the MEC and the network channel of the current routing equipment from the first network channel to the second network channel according to the network channel switching information.

4. A method for unaware routing handoff as recited in claim 3, wherein,

the network channel switching information includes a working state of the MEC.

5. A method for unaware routing handoff as set forth in claim 4, wherein,

after the network channel switching information is sent to the rest of the routing devices, the method further comprises the following steps:

detecting whether the current routing equipment receives response information fed back by the rest routing equipment or not;

repeatedly sending network channel switching information to the rest of routing equipment under the condition that the current routing equipment does not receive the response information until the rest of routing equipment receives the network channel switching information;

and stopping sending the network channel switching information to the rest routing equipment under the condition that the current routing equipment receives the response information.

6. The method for unaware routing handoff of claim 5, wherein,

and the response information is information fed back after the rest of routing equipment successfully receives the network channel switching information.

7. The method for unaware routing handoff of claim 6, wherein,

the transmission path of the service request sent by the first network channel to the service terminal is a service terminal, CPE, a base station, a router and a user intranet; the transmission path of the service request sent by the second network channel to the service terminal is a service terminal, CPE, a base station, transmission equipment, a core network, an APN server, a router and a user intranet.