WO2023019874A1

WO2023019874A1 - Distributed service forwarding method, apparatus and system, storage medium, and electronic device

Info

Publication number: WO2023019874A1
Application number: PCT/CN2022/070569
Authority: WO
Inventors: 陈树民
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-08-20
Filing date: 2022-01-06
Publication date: 2023-02-23
Also published as: CN115708384A

Abstract

A distributed service forwarding method, apparatus and system, a storage medium, and an electronic device. The method is applied to a centralized forwarding device, and comprises: receiving a service message, forwarded by a first CPE by means of a tunnel, of a service terminal (S302); in the case that the service message is a unicast message, forwarding the service message to a destination service terminal according to a unicast forwarding table (S304); and in the case that the service message is a multicast message, forwarding the service message to the destination service terminal according to a multicast forwarding table (S306).

Description

Distributed service forwarding method, device, system, storage medium and electronic equipment

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110963727.X and a filing date of August 20, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The embodiments of the present application relate to the communication field, and in particular, relate to a distributed service forwarding method, device, system, storage medium, and electronic equipment.

Background technique

For some production services in the electric power and industrial fields that require high bandwidth and delay, they cannot be carried by wireless communication. However, the deployment of optical fibers in some special industrial scenarios is limited, which seriously restricts the deployment of industrial digitalization.

With the maturity and commercial use of 5G technology, this problem has been greatly solved. The characteristics of large bandwidth, low latency, and large connections of the 5G network completely solve the problem of long-term dependence on wired communication.

From the perspective of network structure, the wired network is a distributed forwarding model, and the 5G network is a tree-shaped forwarding model. All services need to be forwarded centrally through the User Plane Function. However, the uplink bandwidth of the 5G wireless air interface is likely to cause a bottleneck, which is the same as the two-way bandwidth of wired communication, but it is very different.

Figure 1 is a network diagram of the CPE forwarding service according to the related technical solution. As shown in Figure 1, when the Customer Premise Equipment (CPE for short) communicates with other members in the group through multicast, the CPE device performs multicast communication. Networking, the number of connections, and bandwidth all have N-party problems, which pose great challenges to the processing capabilities of terminals and the uplink bandwidth of air interfaces of base stations.

Aiming at the problem that the CPE device networking in the related technical solutions poses a great challenge to the processing capability of the terminal and the uplink bandwidth of the air interface of the base station, no solution has been proposed yet.

Contents of the invention

Embodiments of the present application provide a distributed service forwarding method, device, system, storage medium, and electronic equipment to at least solve one of the related technical problems to a certain extent, including the ability to process terminals through CPE equipment networking. And the uplink bandwidth of the air interface of the base station brings great challenges.

According to an embodiment of the present application, a distributed service forwarding method is provided, which is applied to a centralized forwarding device, including: receiving the service message of the service terminal forwarded by the first CPE through the tunnel; when the service message is a unicast message In the case of a text message, forward the service message to the destination service terminal according to the pre-established unicast forwarding table; forwarding the service packet to the destination service terminal.

According to another embodiment of the present application, a distributed service forwarding method is also provided, which is applied to a CPE, including: receiving a service message sent by a service terminal; sending the service message to a centralized forwarding device through a tunnel, wherein , the centralized forwarding device is configured to forward the service message to the destination service terminal according to a pre-established unicast forwarding table if the service message is a unicast message; If it is a multicast message, forward the service message to the destination service terminal according to the pre-established multicast forwarding table.

According to another embodiment of the present application, a distributed service forwarding device is also provided, which is applied to a centralized forwarding device, including: a first receiving module, configured to receive the service message of the service terminal forwarded by the first CPE through the tunnel The unicast forwarding module is set to forward the service message to the destination service terminal according to the pre-established unicast forwarding table when the service message is a unicast message; the multicast forwarding module is set to If the service message is a multicast message, forward the service message to the destination service terminal according to the pre-established multicast forwarding table.

According to another embodiment of the present application, a distributed service forwarding device is also provided, which is applied to a CPE, including: a second receiving module, configured to receive a service message sent by a service terminal; a sending module, configured to pass The tunnel sends the service message to the centralized forwarding device, wherein the centralized forwarding device is configured to forward the service message according to a pre-established unicast forwarding table if the service message is a unicast message The message is forwarded to the destination service terminal; if the service message is a multicast message, the service message is forwarded to the destination service terminal according to the pre-established multicast forwarding table.

According to another embodiment of the present application, a distributed service forwarding system is also provided, at least including: a first CPE and a centralized forwarding device, wherein the first CPE is configured to receive service packets sent by service terminals , and forward the service message to the centralized forwarding device through a tunnel; the centralized forwarding device is configured to execute the method described in any one of the above.

According to yet another embodiment of the present application, a computer-readable storage medium is also provided, and a computer program is stored in the storage medium, wherein the computer program is configured to execute any one of the above method embodiments when running in the steps.

According to yet another embodiment of the present application, there is also provided an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to perform any of the above Steps in the method examples.

Description of drawings

Fig. 1 is a network block diagram according to the CPE forwarding service in the relevant technical solution;

FIG. 2 is a schematic block diagram of a hardware structure of a device for a distributed service forwarding method according to an embodiment of the present application;

FIG. 3 is a flowchart of a distributed service forwarding method according to an embodiment of the present application;

FIG. 4 is a flowchart of a distributed service forwarding method according to another embodiment of the present application;

FIG. 5 is a block diagram of a distributed service forwarding system according to an embodiment of the present application;

FIG. 6 is a block diagram of a distributed service forwarding system according to another embodiment of the present application;

FIG. 7 is a schematic diagram of a distributed service forwarding system according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a tunnel-based service Overlay according to an embodiment of the present application;

FIG. 9 is a flowchart of service forwarding according to an embodiment of the present application;

FIG. 10 is a schematic diagram of service multicast forwarding based on a 5G network according to an embodiment of the present application;

FIG. 11 is a flowchart of multicast forwarding of service packets based on a 5G network according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a multicast forwarding table according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a service terminal multicast message according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a CPE sending a multicast message according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a centralized forwarding device sending a message according to an embodiment of the present application;

Fig. 16 is a block diagram of a distributed service forwarding device according to an embodiment of the present application;

Fig. 17 is a block diagram of a distributed service forwarding device according to another embodiment of the present application.

Detailed ways

Embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence.

The method embodiments provided in the embodiments of the present application may be executed in mobile terminals, computer terminals or similar computing devices. Taking running on a similar computing device as an example, Fig. 2 is a block diagram of the hardware structure of the device of the distributed service forwarding method according to the embodiment of the present application. As shown in Fig. 2, it may include one or more (only shown in Fig. 2 1) Processor 102 (processor 102 may include but not limited to processing devices such as microprocessor MCU or programmable logic device FPGA, etc.) and memory 104 for storing data, which may also include transmission equipment for communication functions 106 and input and output devices 108 . Those of ordinary skill in the art can understand that the structure shown in FIG. 2 is only for illustration and does not limit the above structure. For example, more or fewer components than shown in FIG. 2 may also be included, or have a different configuration than shown in FIG. 2 .

The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the distributed service forwarding method in the embodiment of the present application, and the processor 102 runs the computer program stored in the memory 104, thereby Executing various functional applications and slicing processing of the service chain address pool is to realize the above-mentioned method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the device via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 106 is arranged to receive or transmit data via a network. Specific examples of the above-mentioned network may include a wireless network provided by the communication provider of the device. In one example, the transmission device 106 may include a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet in a wireless manner.

In this embodiment, a distributed service forwarding method running on the above-mentioned device or network architecture is provided. FIG. 3 is a flowchart of a distributed service forwarding method according to an embodiment of the present application. As shown in FIG. 3 , it is applied to Centralized forwarding equipment, the process includes the following steps:

Step S302, receiving the service message (ie service message) of the service terminal forwarded by the first CPE through the tunnel;

Step S304, if the service message is a unicast message, forward the service message to the destination service terminal according to the pre-established unicast forwarding table;

In this embodiment, the above step S304 may specifically include: obtaining the IP address of the corresponding second CPE from the unicast forwarding table, and encapsulating a tunnel label according to the IP address of the second CPE; The service packet is forwarded to the second CPE, where the second CPE is configured to forward the service packet to the destination service terminal.

Step S306, if the service message is a multicast message, forward the service message to the destination service terminal according to the pre-established multicast forwarding table.

In this embodiment, the above step S306 may at least include:

Obtain the IP address of the second CPE and the IP address of the destination service terminal according to the multicast forwarding table, wherein the second CPE is one or more, and one second CPE corresponds to one IP address (Internet Protocol, network protocol);

In some examples, the IP address of the first CPE can be obtained (public network IP address) according to the outer layer IP address of the service message, which may specifically include: obtaining the multicast IP address of the service message; The broadcast forwarding table obtains the IP addresses of multiple CPEs and the IP addresses of multiple service terminals corresponding to the multicast IP address, wherein the multicast forwarding table includes the multicast IP address, the IP address of the CPE, and the IP addresses of the service terminals. Address correspondence, wherein the correspondence refers to the mutual correspondence between the aforementioned three IP addresses; determine the IP address of the second CPE according to the IP addresses of the multiple CPEs, and determine the second The IP address of the service terminal corresponding to the IP address of the CPE is the IP address of the destination service terminal. Specifically, when the first CPE is only connected to one service terminal, it is determined that the IP addresses of the multiple CPEs except the The IP address of a CPE other than the IP address of the first CPE is the IP address of the second CPE, and when the first CPE is connected to multiple service terminals, determine that the IP addresses of the multiple CPEs are the second CPE IP address.

forwarding the service packet to the destination service terminal according to the IP address of the second CPE and the IP address of the destination service terminal. In some examples, the multicast IP address in the service message is modified to the IP address of the destination service terminal to obtain the target service message; according to the IP address of the second CPE, the target service message is forward the message to the second CPE, where the second CPE is used to forward the service message to the destination service terminal. In one embodiment, the tunnel label can be encapsulated according to the IP address of the second CPE; the target service packet is forwarded to the second CPE through the tunnel corresponding to the tunnel label; in another embodiment, in the In the case where the second CPE supports multicast, copy the target service message according to the number of IP addresses of the second CPE, wherein one second CPE corresponds to one target service message; the copied target The service message is sent to the corresponding second CPE, and is sent to the destination service terminal through the second CPE in unicast or multicast mode; when the second CPE does not support multicast, according to The number of IP addresses of the target service terminal copies the target service message, wherein one target service terminal corresponds to one target service message.

In another embodiment, if the IP address of the second CPE includes the IP address of the first CPE, that is, the second CPE includes the first CPE, and the first CPE is connected to multiple service terminals, then the target service terminal includes the Among all service terminals of the first CPE, other service terminals except the service terminal sending the service message, and other service terminals accessed under the second CPE except the first CPE; the copied target service report The message is sent to all corresponding second CPEs (including the first CPE), and the first CPE sends the target service message to other service terminals under the first CPE except the service terminal that sends the service message through unicast mode. The other second CPEs other than the one CPE send the target service packets to their corresponding service terminals in a unicast or multicast manner.

According to another aspect of this embodiment, a distributed service forwarding method is also provided. FIG. 4 is a flowchart of a distributed service forwarding method according to another embodiment of the present application. As shown in FIG. 4, it is applied to a CPE, This process may include, but is not limited to, the following steps:

Step S402, receiving the service message sent by the service terminal;

Step S404, sending the service message to the centralized forwarding device through the tunnel, wherein the centralized forwarding device is configured to send the service message according to the pre-established unicast forwarding table if the service message is a unicast message The service message is forwarded to the destination service terminal; if the service message is a multicast message, the service message is forwarded to the destination service terminal according to a pre-established multicast forwarding table.

In an embodiment, the method further includes: receiving a target service packet forwarded by the centralized forwarding device according to the IP address of the CPE, wherein the target service packet is the service packet forwarded by the centralized forwarding device The multicast IP address in the message is obtained after modifying the IP address of the destination service terminal; in some examples, the target service message forwarded by the centralized forwarding device is received through a tunnel corresponding to the tunnel label, wherein , the tunnel label is obtained by encapsulation of the centralized forwarding device according to the IP address of the CPE, specifically, in the case of supporting multicast, receiving the The target service message is sent to the target service terminal through unicast or multicast, wherein one CPE corresponds to one target service message; if multicast is not supported, the The centralized forwarding device copies the target service message according to the number of IP addresses of the target service terminal, and sends it to the target service terminal in a unicast manner, wherein one target service terminal corresponds to one target service message ; Forwarding the target service message to the target service terminal.

In another embodiment, the method further includes: receiving the service packet forwarded by the centralized forwarding device through a tunnel corresponding to a tunnel label, wherein the tunnel label is the unicast forwarding table obtained by the centralized forwarding device Obtaining the IP address of the CPE from the IP address of the CPE, and encapsulating the IP address of the CPE; forwarding the service packet to the destination service terminal.

According to another embodiment of the present application, a distributed service forwarding system is also provided. FIG. 5 is a block diagram of a distributed service forwarding system according to an embodiment of the present application. As shown in FIG. 5 , it includes: a first CPE52 and centralized forwarding device 54, wherein,

The first CPE52 is set to receive the service message sent by the service terminal, and forward the service message to the centralized forwarding device 54 through a tunnel;

The centralized forwarding device 54 is configured to receive the service message; when the service message is a unicast message, forward the service message to the destination service terminal according to a pre-established unicast forwarding table ; If the service message is a multicast message, forward the service message to the destination service terminal according to the pre-established multicast forwarding table.

In one embodiment, FIG. 6 is a block diagram of a distributed service forwarding system according to another embodiment of the present application. As shown in FIG. 6, the system further includes a second CPE62, and the centralized forwarding device 54 is also configured According to the multicast forwarding table, obtain the IP address of the second CPE62 and the IP address of the destination service terminal, wherein, the second CPE62 is one or more, and one of the second CPE62 corresponds to one of the IP address: forwarding the service packet to the destination service terminal according to the IP address of the second CPE62 and the IP address of the destination service terminal.

In one embodiment, the centralized forwarding device 54 is further configured to obtain the multicast IP address of the service message; obtain the IP addresses of multiple CPEs corresponding to the multicast IP address according to the multicast forwarding table. address and the IP addresses of multiple service terminals, wherein the multicast forwarding table includes the correspondence between the multicast IP address, the IP address of the CPE, and the IP address of the service terminal; according to the IP addresses of the multiple CPEs Determine the IP address of the second CPE62, and determine the IP address of the service terminal corresponding to the IP address of the second CPE62 as the IP address of the destination service terminal.

In an embodiment, the first CPE52 is further configured to encapsulate a tunnel label for the service message, wherein the tunnel label is used to indicate that the next hop is the centralized forwarding device 54;

The centralized forwarding device 54 is further configured to decapsulate the tunnel label encapsulated in the service message, and determine the IP address of the first CPE 52 according to the tunnel label.

As shown in FIG. 6, the system further includes a second CPE62, wherein,

The centralized forwarding device 54 is also configured to modify the multicast IP address in the service message to the IP address of the destination service terminal to obtain the target service message; according to the IP address of the second CPE62 Forwarding the target service packet to the second CPE62;

The second CPE62 is further configured to forward the target service packet to the target service terminal.

In one embodiment, the centralized forwarding device 54 is further configured to encapsulate a tunnel label according to the IP address of the second CPE62; forward the target service message to the second CPE62 through the tunnel corresponding to the tunnel label ;

The second CPE62 is configured to receive the target service message through the tunnel, decapsulate the tunnel label, obtain the IP address of the target service terminal in the target service message, and The IP address of the service terminal forwards the target service packet to the target service terminal.

In an embodiment, the centralized forwarding device 54 is further configured to copy the target service message according to the number of IP addresses of the second CPE62 when the second CPE62 supports multicast, wherein, One second CPE62 corresponds to one target service message; sending the copied target service message to the corresponding second CPE62;

The centralized forwarding device 54 is further configured to copy the target service message according to the number of IP addresses of the target service terminals when the second CPE62 does not support multicast, wherein one target service terminal corresponds to One target service message; sending the copied target service message to the corresponding second CPE62;

The second CPE62 is further configured to send the target service message to the target service terminal through unicast or multicast.

In another embodiment, the system further includes: a third CPE, wherein,

The centralized forwarding device 54 is also configured to obtain the IP address of the corresponding third CPE from the unicast forwarding table, and encapsulate the tunnel label according to the IP address of the third CPE; Forwarding the service packet to the third CPE;

The third CPE is further configured to forward the service packet to the destination service terminal.

In this embodiment, both the first CPE52 and the second CPE62 may include one or more CPEs.

Fig. 7 is a schematic diagram of a distributed service forwarding system according to an embodiment of the present application. As shown in Fig. 7, it includes two main parts: CPE and centralized forwarding equipment, wherein the centralized forwarding equipment is a key part, and CPE performs service terminal access , the service message is transparently transmitted to the centralized forwarding device through the Overlay method, and the centralized forwarding device forwards the message to the corresponding destination CPE through the Overlay method according to the global route, and the CPE forwards the message to the destination service terminal according to the local route, where the destination service terminal is a service terminal one or more of .

In this embodiment, the centralized forwarding node is deployed to simplify the network structure, and the centralized forwarding node generates two routing tables for unicast and multicast respectively. For multicast services, the centralized forwarding device has a routing table including CPE and service terminal addresses. When the centralized forwarding device receives a multicast message, it indexes the multicast IP address to find the corresponding CPE and the group members attached to the CPE. Information, copy multiple packets whose outer address is the destination CPE, and the inner address is the destination service terminal, and forward them. It is only necessary for the CPE to support unicast packet forwarding, and it is not necessary to support the multicast function, further reducing the forwarding pressure of the CPE.

Fig. 8 is a schematic diagram of a tunnel-based service Overlay according to an embodiment of the present application. As shown in Fig. 8, a service terminal message is connected to a 5G network through a wireless CPE, and forwarded to a user data network through a base station, a bearer network, and a core network UPF Or the Internet, for communication between terminals, it is forwarded to the destination service terminal by UPF. Since a centralized forwarding device is required to forward industry-distributed service packets, a tunnel needs to be established between the CPE and the centralized forwarding device so that service packets can be forwarded to the centralized forwarding device in one hop. network routing, and distributed services are forwarded through private network routing. According to business needs, you can choose Virtual eXtensible Local Area Network (VxLAN for short), Generic Routing Encapsulation (GRE for short), or Layer 2 Tunneling Protocol (L2TP for short), etc. tunnel technology. For the currently running 5G network system, including any changes to wireless base stations, bearer networks, and core network wireless; no changes are required for business terminals (DTU equipment in power scenarios).

There are two options for CPE:

Method 1: The CPE does not need to be upgraded, and the CPE only supports unicast mode. The centralized multicast forwarding system copies the multicast message as a message whose destination address is all other members in the group, and forwards it as a unicast form, such as CPE downlink n service terminals will copy n copies of the unicast message and forward it to each destination service terminal.

Method 2: The CPE is upgraded to support the multicast function, and the multicast message is copied through the centralized multicast forwarding system. If there are m CPE members, it will be copied into m multicast messages. broadcast to the destination service terminal, where m is less than n.

The method is more compatible with existing network equipment and is more suitable for actual deployment, and the technical implementation is relatively complicated. The following uses method 1 as an example to illustrate, and method 2 is similar, so it will not be described again.

For the service message forwarding process, the processing process of the centralized forwarding device is different for unicast and multicast messages, and special processing is performed for multicast forwarding. The multicast routing table item maintained by the centralized forwarding device adds service terminal information, further simplifies the CPE function, does not require the CPE to maintain the multicast routing table item, and is compatible with most current CPE devices, while the centralized forwarding device performs unicast processing on the downlink data. The distribution is sent to the destination CPE, and finally forwarded to the destination service terminal. When there are multiple service terminals connected to the CPE, the centralized forwarding device needs to send multiple flows to the destination CPE. Fig. 9 is a flowchart of service forwarding according to an embodiment of the present application, as shown in Fig. 9, including:

Step S901, the service terminal sends a service message;

Step S902, after receiving the message from the source service terminal, the CPE encapsulates the tunnel label, and the next hop is the centralized forwarding device;

In step S903, when the centralized forwarding device receives the message from the CPE, it decapsulates the tunnel label and judges whether it is a multicast message. If the judgment result is no, execute step S904. If the judgment result is yes, execute Step S907;

Step S904, the centralized forwarding device searches the unicast forwarding table, keeps the destination address unchanged, encapsulates the tunnel label, and sends the unicast message to the CPE;

Step S905, the CPE receives the unicast message, decapsulates the tunnel label in the unicast message, and forwards the unicast message to the destination service terminal according to the service destination address;

Step S906, the destination service terminal receives the service message;

Step S907, the centralized forwarding device searches the multicast forwarding table, changes the multicast address to the destination service terminal address, and sends the multicast message to the CPE;

Step S908, the CPE receives the multicast message, decapsulates the tunnel label in the multicast message, and forwards it to the destination service terminal according to the service destination address;

Step S909, the destination service terminal receives the service message.

Since unicast packets are forwarded using a general processing method, only the multicast situation will be described in detail below.

For the situation where the CPE is only connected to one service terminal is relatively simple, FIG. 10 is a schematic diagram of multicast forwarding of services based on a 5G network according to an embodiment of the present application. As shown in FIG. 10 , the situation where the CPE is connected to multiple service terminals is relatively complicated , FIG. 11 is a flowchart of multicast forwarding of service packets based on a 5G network according to an embodiment of the present application. As shown in FIG. 11 , this scenario is taken as an example for illustration.

Step 1, the service terminal sends the service message to the source CPE.

Step 2: After receiving the service message, the source CPE performs tunnel encapsulation processing, and the default next hop is the centralized forwarding device.

The above steps 2 further include:

S21, as shown in Figure 11, the service terminal address is the private network address 10.0.1.0/24, the CPE and the centralized forwarding device are the public network address 172.0.0.0/16, and the CPE encapsulates The public network address is routed and forwarded.

S22, CPE and centralized forwarding device messages are transparently transmitted in the 5G network, without additional configuration and forwarding process processing.

Step 3: The centralized forwarding device receives the service message sent by the source CPE, queries the multicast forwarding table, and indexes related service terminal members through the multicast address.

Step 4: Find the corresponding parent CPE according to the service terminal, and the centralized forwarding device performs tunnel label encapsulation, the next hop is the CPE, and the destination address of the service message is the target Data Terminal Unit (DTU for short).

Step 5: After receiving the message sent by the centralized forwarding device, the destination CPE decapsulates it, performs routing according to the destination address of the service message, and forwards it to the destination service terminal device.

Step 6: The destination service terminal device receives the service message and performs corresponding processing.

The above steps 3 further include:

Step 3.1 Acquisition of multicast forwarding table member information, including:

Method 1: Perform static configuration through planning, plan the service terminal members of each multicast group according to service requirements, allocate multicast addresses for each multicast group, establish a multicast forwarding table, and establish a correspondence table between CPE and service terminals . It is necessary to synchronize DTU planning rules and planning lists, and manually import group information into the data forwarding system. The planning is complicated, and the later maintenance workload is relatively large, but the system has no new function requirements.

Method 2: Report group member information through the service terminal, which supports the multicast control protocol, and through related configuration, the protocol generates service group information. The service terminal reports to the CPE, and the CPE reports to the centralized forwarding device, or directly reports to the centralized forwarding device through the service terminal. The CPE or data forwarding system needs to support the communication interface with the DTU; the post-maintenance workload is relatively small.

Method 3: Obtain member information through the connection of the service side network management, connect with the centralized forwarding device through the service terminal network management, and configure the multicast group by the service terminal network management, and the service terminal network management will synchronize the service group information to the data forwarding system. The data forwarding system needs to be connected to the northbound interface of the DTU monitoring platform, and the post-maintenance workload is relatively small.

The above methods have their own advantages and disadvantages. Method 1 has relatively simple device functions, and requires a relatively large workload of network and service planning in the early stage. It is more suitable for scenarios where the network changes little after it is put into operation. Mode 2 is more flexible to deploy, and can dynamically change the network topology and adjust service relationships in real time. It is more suitable for scenarios where the network is updated quickly and services are upgraded and changed frequently. Mode 3 is relatively compromised, and can be selected according to the needs of more realistic scenarios.

S3.2, the establishment of the multicast forwarding table, according to the member information obtained in S31, establishes the multicast forwarding system multicast forwarding table, which includes several key fields, multicast IP address, CPE IP address and service terminal IP address.

As shown in FIG. 11 , for a multicast group whose multicast IP is 224.1.1.1, members include service terminals with IP addresses 10.0.1.1, 10.0.1.2, 10.0.1.3, 10.0.1.4, and 10.0.1.5. According to the actual network topology, two service terminals 10.0.1.2 and 10.0.1.3 are connected to CPE 10.0.1.2, and the mapping relationship between CPE and service terminal needs to be established in the forwarding table.

Fig. 12 is a schematic diagram of a multicast forwarding table according to an embodiment of the present application. As shown in Fig. 12, each service terminal corresponding to the multicast IP is regarded as a data record, and if multiple service terminals are hung under the same CPE, there are many Records.

S3.3, query the multicast forwarding table, query the multicast forwarding table according to the multicast IP address, take Figure 11 as an example, when the centralized forwarding device receives the multicast address as 224.1.1.1, the source address is 10.0.1.1 When querying the relevant member information, there are five business terminals with IP addresses 10.0.1.1, 10.0.1.2, 10.0.1.3, 10.0.1.4, and 10.0.1.5, and they will send messages to 10.0.1.2, 10.0.1.3, and 10.0 .1.4, the other 4 service terminals of 10.0.1.5 send messages. When the CPE does not support multicast forwarding, the centralized forwarding device needs to send unicast packets to the corresponding destination service terminals. Then, in this embodiment, the centralized forwarding device needs to send four unicast packets to corresponding service terminals at the same time.

The following is a brief description of the packets in the specific forwarding process, including:

Step 1, the source service terminal 10.0.1.1 sends a multicast message, the multicast IP address is 224.1.1.1, Figure 13 is a schematic structural diagram of a service terminal multicast message according to an embodiment of the present application, the message structure is shown in Figure 13 As shown in , it is sent to CPE 172.0.1.1 through the default route.

Step 2, CPE 172.0.1.1 receives the message and performs outer tunnel encapsulation. Figure 14 is a schematic diagram of the structure of a CPE sending a multicast message according to an embodiment of the application. The message structure is shown in Figure 14, and the destination address is 172.0.2.1, the source address is the CPE address, the inner source and sink IP addresses remain unchanged, and forwarded to the centralized forwarding device through the 5G network.

Step 3: The centralized forwarding device receives the message and decapsulates the outer label. Figure 15 is a schematic structural diagram of a message sent by the centralized forwarding device according to an embodiment of the application. The structure of the message is shown in Figure 15, and the 224.1.1.1 For the forwarding processing of the multicast group of ., query the multicast forwarding table, and send 4 unicast packets at the same time, the inner destination IP is the destination service terminal, and the source IP is the remote service terminal IP address 10.0.1.1. The outer layer is encapsulated, and the destination IP is the corresponding destination CPE 172.0.1.2, 172.0.1.3 and 172.0.1.4, and sent to the corresponding destination CPE.

Step 4: Each destination CPE receives the message, decapsulates the outer tunnel, forwards the message in memory according to the local route, and sends it to the corresponding service terminal.

Step 5, each service terminal receives the corresponding service message.

According to another embodiment of the present application, a distributed service forwarding device is also provided, which is applied to a centralized forwarding device. FIG. 16 is a block diagram of a distributed service forwarding device according to an embodiment of the present application. As shown in FIG. 16 , include:

The first receiving module 162 is configured to receive the service message of the service terminal forwarded by the first CPE through the tunnel;

The unicast forwarding module 164 is configured to forward the service message to the destination service terminal according to a pre-established unicast forwarding table when the service message is a unicast message;

The multicast forwarding module 166 is configured to forward the service message to the destination service terminal according to the pre-established multicast forwarding table if the service message is a multicast message.

In one embodiment, the multicast forwarding module 166 includes:

The obtaining submodule is configured to obtain the IP address of the second CPE and the IP address of the destination service terminal according to the multicast forwarding table;

The first forwarding submodule is configured to forward the service packet to the destination service terminal according to the IP address of the second CPE and the IP address of the destination service terminal.

In one embodiment, the acquiring submodule is also set to

Obtain the multicast IP address of the service message;

Obtain the IP addresses of multiple CPEs corresponding to the multicast IP address and the IP addresses of multiple service terminals according to the multicast forwarding table, wherein the multicast forwarding table includes the multicast IP address, the IP address of the CPE, Correspondence between IP addresses of service terminals;

Determine the IP address of the second CPE according to the IP addresses of the multiple CPEs, and determine that the IP address of the service terminal corresponding to the IP address of the second CPE is the IP address of the destination service terminal.

In one embodiment, the first forwarding submodule includes:

The modifying unit is configured to modify the multicast IP address in the service message to the IP address of the target service terminal to obtain the target service message;

A forwarding unit configured to forward the target service packet to the second CPE according to the IP address of the second CPE, wherein the second CPE is configured to forward the service packet to the destination business terminal.

In an embodiment, the forwarding unit is further configured to

encapsulating a tunnel label according to the IP address of the second CPE;

Forwarding the target service packet to the second CPE through the tunnel corresponding to the tunnel label.

In an embodiment, the forwarding unit is further configured to

In the case where the second CPE supports multicast, copy the target service message according to the number of IP addresses of the second CPE, wherein one second CPE corresponds to one target service message; Sending the target service message to the corresponding second CPE, and sending it to the target service terminal through the second CPE in unicast or multicast mode;

In the case where the second CPE does not support multicast, copy the target service message according to the number of IP addresses of the target service terminal, wherein one target service terminal corresponds to one target service message; the copied The target service message is sent to the corresponding second CPE, and is sent to the target service terminal through the second CPE in a unicast manner.

In another embodiment, the unicast forwarding module 144 includes:

The encapsulation submodule is configured to obtain the IP address of the corresponding third CPE from the unicast forwarding table, and encapsulate the tunnel label according to the IP address of the third CPE;

The second forwarding submodule is configured to forward the service packet to the third CPE through the tunnel corresponding to the tunnel label, wherein the third CPE is configured to forward the service packet to the Describe the purpose of the business terminal.

According to another embodiment of the present application, a distributed service forwarding device is also provided, which is applied to a centralized forwarding device. FIG. 17 is a block diagram of a distributed service forwarding device according to another embodiment of the present application, as shown in FIG. 17 , applied to CPE, including:

The second receiving module 172 is configured to receive the service message sent by the service terminal;

The sending module 174 is configured to send the service message to the centralized forwarding device through a tunnel, wherein the centralized forwarding device is configured to send the service message according to the pre-established The unicast forwarding table forwards the service message to the destination service terminal; when the service message is a multicast message, forwards the service message to the destination business terminal.

In one embodiment, the device also includes:

The third receiving module is configured to receive the target service message forwarded by the centralized forwarding device according to the IP address of the CPE, wherein the target service message is the set of the group in the service message sent by the centralized forwarding device The broadcast IP address is obtained after modifying the IP address of the destination service terminal;

The first forwarding module is configured to forward the target service packet to the target service terminal.

In an embodiment, the third receiving module is further configured to

The target service packet forwarded by the centralized forwarding device is received through a tunnel corresponding to a tunnel label, where the tunnel label is obtained by encapsulating the centralized forwarding device according to the IP address of the CPE.

In another embodiment, the third receiving module is further configured to

In the case of supporting multicast, receive the target service message copied by the centralized forwarding device according to the number of IP addresses of the CPE, and send it to the target service terminal in a unicast or multicast mode, wherein, One said CPE corresponds to one said target service message;

If multicast is not supported, then receive the target service message copied by the centralized forwarding device according to the number of IP addresses of the target service terminal, and send it to the target service terminal in a unicast manner, wherein one The target service terminal corresponds to one target service message.

In another embodiment, the device also includes:

The fourth receiving module is configured to receive the service packet forwarded by the centralized forwarding device through a tunnel corresponding to a tunnel label, wherein the tunnel label is obtained by the centralized forwarding device from the unicast forwarding table for the CPE IP address obtained by encapsulation according to the IP address of the CPE;

The second forwarding module is configured to forward the service message to the destination service terminal.

Embodiments of the present application also provide a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to perform the steps in any one of the above method embodiments when running.

In one embodiment, the above-mentioned computer-readable storage medium may include but not limited to: U disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), mobile Various media such as hard disks, magnetic disks, or optical disks that can store computer programs.

An embodiment of the present application also provides an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any one of the above method embodiments.

In an embodiment, the electronic device may further include a transmission device and an input and output device, wherein the transmission device is connected to the processor, and the input and output device is connected to the processor.

For specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments and some implementation manners, and details are not repeated in this embodiment.

In the embodiment of the present application, the service message of the service terminal forwarded by the first CPE through the tunnel is received; when the service message is a unicast message, the service message is forwarded to the destination service terminal according to the unicast forwarding table ; In the case that the service message is a multicast message, the service message is forwarded to the destination service terminal according to the multicast forwarding table, which can solve the problem of terminal processing through CPE equipment networking in related technical solutions The capacity and the uplink bandwidth of the air interface of the base station bring great challenges. The CPE only needs to establish an end-to-end connection with the centralized forwarding device, and forward the service packets through the centralized forwarding device, transforming the purely distributed processing network into forwarding by the centralized forwarding device. The network greatly reduces the uplink bandwidth of the 5G network, simplifies the functions of the CPE, and improves the forwarding efficiency.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned application can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network composed of multiple computing devices In fact, they can be implemented in program code executable by a computing device, and thus, they can be stored in a storage device to be executed by a computing device, and in some cases, can be executed in an order different from that shown here. Or described steps, or they are fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present application is not limited to any specific combination of hardware and software.

The above descriptions are only some embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of this application shall be included within the scope of protection of this application.

Claims

A distributed service forwarding method applied to centralized forwarding equipment, including:

receiving the service message of the service terminal forwarded by the first customer front-end equipment CPE through the tunnel;

When the service message is a unicast message, forwarding the service message to a destination service terminal according to a pre-established unicast forwarding table;

If the service message is a multicast message, forward the service message to the destination service terminal according to a pre-established multicast forwarding table.
The method according to claim 1, wherein forwarding the service message to the destination service terminal according to a pre-established multicast forwarding table comprises:

Obtain the IP address of the second CPE and the IP address of the destination service terminal according to the multicast forwarding table, wherein the second CPE is one or more, and one second CPE corresponds to one IP address ;

forwarding the service packet to the destination service terminal according to the IP address of the second CPE and the IP address of the destination service terminal.
The method according to claim 2, wherein, according to the multicast forwarding table, obtaining the IP address of the second CPE and the IP address of the destination service terminal comprises:

Obtain the multicast IP address of the service message;

Obtain the IP addresses of multiple CPEs corresponding to the multicast IP address and the IP addresses of multiple service terminals according to the multicast forwarding table, wherein the multicast forwarding table includes the multicast IP address, multiple CPEs The corresponding relationship between the IP address of the IP address and the IP addresses of multiple service terminals;

Determine the IP address of the second CPE according to the IP addresses of the multiple CPEs, and determine that the IP address of the service terminal corresponding to the IP address of the second CPE is the IP address of the destination service terminal.
The method according to claim 3, wherein forwarding the service message to the destination service terminal according to the IP address of the second CPE and the IP address of the destination service terminal comprises:

Modifying the multicast IP address in the service message to the IP address of the destination service terminal to obtain the target service message;

Forwarding the target service packet to the second CPE according to the IP address of the second CPE, where the second CPE is configured to forward the target service packet to the target service terminal.
The method according to claim 4, wherein forwarding the target service packet to the second CPE according to the IP address of the second CPE comprises:

encapsulating a tunnel label according to the IP address of the second CPE;

Forwarding the target service packet to the second CPE through the tunnel corresponding to the tunnel label.
The method according to claim 5, wherein forwarding the target service packet to the second CPE according to the IP address of the second CPE comprises:

In the case where the second CPE supports multicast, copy the target service message according to the number of IP addresses of the second CPE, wherein one second CPE corresponds to one target service message; Sending the copied target service message to the corresponding second CPE, and sending it to the target service terminal through the second CPE in unicast or multicast mode;

When the second CPE does not support multicast, copy the target service message according to the number of IP addresses of the target service terminal, wherein one target service terminal corresponds to one target service message; Send the copied target service message to the corresponding second CPE, and send it to the target service terminal through the second CPE in a unicast manner.
The method according to any one of claims 1 to 6, wherein forwarding the service message to the destination service terminal according to a pre-established unicast forwarding table comprises:

Obtain the IP address of the corresponding third CPE from the unicast forwarding table, and encapsulate the tunnel label according to the IP address of the third CPE;

Forwarding the service packet to the third CPE through the tunnel corresponding to the tunnel label, where the third CPE is configured to forward the service packet to the destination service terminal.
A distributed service forwarding method, applied to customer front-end equipment CPE, including:

Receive the service message sent by the service terminal;

Send the service message to the centralized forwarding device through a tunnel, wherein the centralized forwarding device is configured to forward the service message according to a pre-established unicast forwarding table when the service message is a unicast message The service message is forwarded to the destination service terminal; if the service message is a multicast message, the service message is forwarded to the destination service terminal according to the pre-established multicast forwarding table.
The method of claim 8, further comprising:

receiving the target service message forwarded by the centralized forwarding device according to the IP address of the CPE, wherein the target service message is the multicast IP address in the service message modified by the centralized forwarding device to the Obtained after stating the IP address of the destination service terminal;

Forwarding the target service packet to the target service terminal.
The method according to claim 9, wherein receiving the target service message forwarded by the centralized forwarding device according to the IP address of the CPE comprises:

The target service packet forwarded by the centralized forwarding device is received through a tunnel corresponding to a tunnel label, where the tunnel label is obtained by encapsulating the centralized forwarding device according to the IP address of the CPE.
The method according to claim 10, wherein receiving the target service message forwarded by the centralized forwarding device through the tunnel corresponding to the tunnel label comprises:

In the case of supporting multicast, receive the target service message copied by the centralized forwarding device according to the number of IP addresses of the CPE, and send it to the target service terminal in a unicast or multicast mode, wherein one The CPE corresponds to one target service message;

When multicast is not supported, receive the target service message copied by the centralized forwarding device according to the number of IP addresses of the target service terminal, and send it to the target service terminal in a unicast manner, wherein one of the The target service terminal corresponds to one target service message.
The method according to any one of claims 8 to 11, wherein the method further comprises:

Receive the service packet forwarded by the centralized forwarding device through the tunnel corresponding to the tunnel label, where the tunnel label is the IP address of the CPE obtained by the centralized forwarding device from the unicast forwarding table, and according to obtained by encapsulating the IP address of the CPE;

Forwarding the service message to the destination service terminal.
A distributed service forwarding device, applied to centralized forwarding equipment, comprising:

The first receiving module is configured to receive the service message of the service terminal forwarded by the first client front-end equipment CPE through the tunnel;

The unicast forwarding module is configured to forward the service message to the destination service terminal according to a pre-established unicast forwarding table when the service message is a unicast message;

The multicast forwarding module is configured to forward the service message to the destination service terminal according to the pre-established multicast forwarding table if the service message is a multicast message.
A distributed service forwarding device, applied to customer front-end equipment CPE, including:

The second receiving module is configured to receive the service message sent by the service terminal;

The sending module is configured to send the service message to the centralized forwarding device through the tunnel, wherein the centralized forwarding device is configured to send the service message according to the pre-established unicast message when the service message is a unicast message. The broadcast forwarding table forwards the service message to the destination service terminal; when the service message is a multicast message, forwards the service message to the destination terminal according to the pre-established multicast forwarding table business terminal.
A distributed service forwarding system, at least including: a first customer front-end equipment CPE and a centralized forwarding device, wherein,

The first CPE is configured to receive a service message sent by a service terminal, and forward the service message to the centralized forwarding device through a tunnel;

The centralized forwarding device is configured to execute the method according to any one of claims 1-7.
A computer-readable storage medium storing a computer program, wherein the computer program is configured to perform the method described in any one of claims 1-7, 8-12 when running.
An electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to perform any one of claims 1 to 7, 8 to 12 method described in .