Networking structure and communication method

Abstract

The present application relates to the technical field of communications, and provides a networking structure and a communication method. The networking structure comprises an access layer L2 node of a packet transport network (PTN), a convergence layer L2 node of the PTN, a convergence layer L3 node of a slicing packet network (SPN), and a core layer L3 node of the SPN, wherein the access layer L2 node of the PTN is interconnected with a 5G base station side building baseband unit (BBU); the access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN by means of an L2 tunnel link; the convergence layer L2 node of the PTN is interconnected with the convergence layer L3 node of the SPN; the convergence layer L3 node of the SPN communicates with the core layer L3 node of the SPN by means of an L3 tunnel link; the core layer L3 node of the SPN is interconnected with a 5G core network.

Description

Network structure and communication method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202311456701.1 filed on November 03, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a networking structure and a communication method. Background Art

[0004] Fourth-generation mobile communication technology (4G) services are carried by traditional packet transport networks (PTNs), with a high PTN deployment rate at physical sites and almost full coverage. Fifth-generation mobile communication technology (5G) services are carried by new slicing packet networks (SPNs), with a low SPN deployment rate at physical sites. The 4G PTN and 5G SPN networks are separated and independently constructed, with interconnection points at the core layer to resolve X2 traffic between 4G and 5G within the region. The 5G SPN network has a relatively small coverage area, which greatly restricts the expansion of 5G services. For areas where 5G SPN is not fully covered, building a new 5G SPN network will require a large investment and have poor energy-saving and emission-reduction effects.

[0005] Summary of the Invention

[0006] The present application provides a networking structure and communication method to solve the problem in related technologies that the coverage of 5G SPN networks is small, which greatly restricts the expansion of 5G services. For areas where 5G SPN is not fully covered, if a new 5G SPN network is built, there will be defects such as high investment cost and poor energy saving and emission reduction effect.

[0007] The present application provides a networking structure, including: an access layer L2 node of a packet transport network PTN, an aggregation layer L2 node of the PTN, an aggregation layer L3 node of a slice packet network SPN, and a core layer L3 node of the SPN, wherein the access layer L2 node of the PTN is interconnected with a baseband processing unit (Building Base band Unit, BBU) on a 5G base station side according to VLAN identification, and is used to receive 5G service information sent by the BBU on the 5G base station side; the access layer L2 node of the PTN communicates with the aggregation layer L2 node of the PTN through an L2 tunnel link; the aggregation layer L2 node of the PTN is interconnected with the aggregation layer L3 node of the SPN according to VLAN and IP identification, and is used to realize cross-network forwarding of the 5G service information; the aggregation layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link; the core layer L3 node of the SPN is interconnected with the 5G core network according to IP identification, and is used to send the 5G service information to the 5G core network.

[0008] According to a networking structure provided by the present application, the aggregation layer L2 node of the PTN is interconnected with the aggregation layer L3 node of the SPN according to the virtual local area network (VLAN) and IP identification, including: the first link aggregation group (LAG) port of the aggregation layer L2 node of the PTN and the second LAG port of the aggregation layer L3 node of the SPN are interconnected according to VLAN and IP identification; wherein, the first LAG port aggregates multiple physical ports of the aggregation layer L2 node of the PTN; the second LAG port aggregates multiple physical ports of the aggregation layer L3 node of the SPN.

[0009] According to a networking structure provided by the present application, the aggregation layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link, including: the second LAG port of the aggregation layer L3 node of the SPN communicates with the network exit of the core layer L3 node of the SPN through an L3 tunnel link.

[0010] According to a networking structure provided by the present application, the core layer L3 node of the SPN is interconnected with the 5G core network according to IP identification, including: the network exit of the core layer L3 node of the SPN is interconnected with the interface of the 5G core network according to Internet Protocol (IP) identification.

[0011] According to a networking structure provided by the present application, the access layer L2 node of the PTN communicates with the aggregation layer L2 node of the PTN through an L2 tunnel link, including: the service interface of the access layer L2 node of the PTN communicates with the first LAG port of the aggregation layer L2 node of the PTN through the L2 tunnel link.

[0012] The present application also provides a communication method, comprising:

[0013] The access layer L2 node of the packet transport network PTN receives 5G service information sent by the BBU on the 5G base station side;

[0014] Creating an L2 tunnel link between an access layer L2 node of the PTN and an aggregation layer L2 node of the PTN, and sending the 5G service information to the aggregation layer L2 node of the PTN through the L2 tunnel link;

[0015] The convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the slice packet network SPN;

[0016] Creating an L3 tunnel link between the convergence layer L3 node of the SPN and the core layer L3 node of the SPN, and forwarding the 5G service information to the core layer L3 node of the SPN through the L3 tunnel link;

[0017] The core layer L3 node of the SPN forwards the 5G service information to the 5G core network.

[0018] According to a communication method provided by the present application, the convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the SPN, including:

[0019] Connecting the first LAG port of the convergence layer L2 node of the PTN to the second LAG port of the convergence layer L3 node of the SPN;

[0020] The convergence layer L2 node of the PTN forwards the 5G service information to the second LAG port of the convergence layer L3 node of the SPN through the first LAG port;

[0021] The first LAG port of the convergence layer L2 node of the PTN and the second LAG port of the convergence layer L3 node of the SPN are interconnected according to VLAN and IP identification.

[0022] According to a communication method provided by the present application, the creating of an L3 tunnel link between the convergence layer L3 node of the SPN and the core layer L3 node of the SPN includes:

[0023] An L3 tunnel link is established from the second LAG port of the convergence layer L3 node of the SPN to the network egress of the core layer L3 node of the SPN.

[0024] According to a communication method provided by the present application, the L3 core layer of the SPN forwards the 5G service information to the 5G core network, including:

[0025] Interoperable routing between the network egress of the core layer L3 node of the SPN and the interface of the 5G core network;

[0026] The network egress of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network.

[0027] According to a communication method provided by the present application, an L2 tunnel link is created between an access layer L2 node of the PTN and an aggregation layer L2 node of the PTN, and 5G service information is sent to the aggregation layer L2 node of the PTN through the L2 tunnel link, including:

[0028] Establishing an L2 tunnel link from the service interface of the access layer L2 node of the PTN to the first LAG port of the convergence layer L2 node of the PTN;

[0029] The service interface of the access layer L2 node of the PTN sends the 5G service information to the first LAG port of the convergence layer L2 node of the PTN through the L2 tunnel link.

[0030] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described communication methods when executing the program.

[0031] The present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements any of the communication methods described above when executed by a processor.

[0032] The present application also provides a computer program product, comprising a computer program, which implements any of the above-described communication methods when executed by a processor.

[0033] In the present application, the networking structure includes: an access layer L2 node of a packet transport network PTN, an aggregation layer L2 node of the PTN, an aggregation layer L3 node of a sliced ​​packet network SPN, and a core layer L3 node of the SPN, wherein the access layer L2 node of the PTN is interconnected with the BBU on the 5G base station side, for receiving 5G service information sent by the BBU on the 5G base station side; the access layer L2 node of the PTN communicates with the aggregation layer L2 node of the PTN through an L2 tunnel link; the aggregation layer L2 node of the PTN is interconnected with the aggregation layer L3 node of the SPN, for realizing cross-network forwarding of 5G service information; the aggregation layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link; the core layer L3 node of the SPN is interconnected with the 5G core network, for sending 5G service information to the 5G core network. In this way, the base station side uses the PTN network, and interconnects the PTN and SPN at the aggregation layer. The SPN is used above the aggregation layer, so that 5G services can be carried in a mixed manner on the SPN and PTN networks, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G business development. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in this application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] FIG1 is a schematic diagram of a network structure provided in an embodiment of the present application;

[0036] FIG2 is a flow chart of a communication method according to an embodiment of the present application;

[0037] FIG3 is a schematic diagram of a service process of hybrid carrying of SPN and PTN networks provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0039] In order to solve the problems in the related art, the embodiments of the present application provide a networking structure and a communication method.

[0040] FIG1 is a schematic diagram of a network structure provided by an embodiment of the present application. As shown in FIG1 , the network structure includes: an access layer L2 node of a packet transport network PTN, an aggregation layer L2 node of the PTN, an aggregation layer L3 node of a slice packet network SPN, and a core layer L3 node of the SPN.

[0041] The access layer L2 node of the PTN is interconnected with the baseband processing unit (Building Base band Unit, BBU) on the 5G base station side, and is used to receive 5G service information sent by the BBU on the 5G base station side;

[0042] The access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN through an L2 tunnel link;

[0043] The convergence layer L2 node of the PTN is interconnected with the convergence layer L3 node of the SPN to achieve cross-network forwarding of the 5G service information;

[0044] The convergence layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link;

[0045] The core layer L3 node of the SPN is interconnected with the 5G core network and is used to send the 5G service information to the 5G core network.

[0046] It should be noted that the networking structure provided in this application is applicable to sites within the access layer base station that are only covered by the PTN network and do not have an SPN deployed. The base station side uses the PTN network, and the PTN and SPN are interconnected at the aggregation layer. The SPN is used above the aggregation layer to achieve mixed carrying of 5G services on the SPN and PTN networks. This can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G service development.

[0047] As shown in Figure 1, the 5G base station-side BBU is accessed through the access layer L2 node of the PTN. The access layer L2 PTN ring is attached to the aggregation layer L2 PTN ring. A communication interconnection point between the L2 PTN and the L3 SPN is established at the aggregation layer (multi-port UNI LAG mode, as shown in Figure 1 ①). The aggregation L3 SPN ring is attached to the backbone L3 SPN ring, which is attached to the core L3 SPN ring. The core L3 SPN establishes a communication interconnection point with the 5G core network for intercommunication. The access layer L2 node of the PTN is a node on the access layer L2 PTN ring, the aggregation layer L2 node of the PTN is a node on the aggregation layer L2 PTN ring, the aggregation layer L3 node of the SPN is a node on the aggregation L3 SPN ring, and the core layer L3 node of the SPN is a node on the core L3 SPN ring.

[0048] The access layer L2 node of the PTN is interconnected with the BBU on the 5G base station side. The BBU on the 5G base station side sends 5G service information to the L2 node of the access layer of the PTN, and the access layer L2 node of the PTN receives the 5G service information sent by the BBU on the 5G base station side.

[0049] Furthermore, the access layer L2 node of the PTN is interconnected with the BBU on the 5G base station side through the optical port according to the virtual local area network (VLAN) identification method.

[0050] VLANs are a technology that divides a physical network into multiple logically independent virtual networks. Each VLAN can contain a group of network devices with common characteristics, regardless of their physical topological location. VLANs are not restricted by physical location and can span different switches and routers.

[0051] There are many ways to identify VLANs, the most common of which are: MAC address-based division; IP address-based division; port-based division.

[0052] The access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN through an L2 tunnel link. The access layer L2 node of the PTN is used to send 5G service information to the convergence layer L2 node of the PTN.

[0053] An L2 tunnel link uses the Layer 2 Tunneling Protocol for communication. The Layer 2 Tunneling Protocol (L2TP) is a commonly used virtual private network (VPN) protocol that creates secure, encrypted communication tunnels to protect data security during network communications. The L2TP protocol encapsulates data packets within two protocols: the Point-to-Point Protocol (PPP) and L2TP itself, forming a PPP / L2TP packet. PPP / L2TP packets use encryption algorithms to protect data during transmission, ensuring data integrity and confidentiality. L2TP can establish secure connections over public networks such as the Internet, enabling remote users to access internal enterprise network resources. Furthermore, because L2TP can be combined with other protocols, such as Internet Protocol Security (IPSec), it can provide an even higher level of security.

[0054] The convergence layer L2 node of the PTN is interconnected with the convergence layer L3 node of the SPN, and the convergence layer L2 node of the PTN sends the 5G service information to the convergence layer L3 node of the SPN, thereby realizing cross-network forwarding of the 5G service information;

[0055] Specifically, a multi-port UNI LAG mode is used to establish the L2 PTN and L3 SPN communication interconnection point at the aggregation layer, as shown in ① in Figure 1.

[0056] At the aggregation layer, the SPN and PTN interconnect using UNI LAGs (Link Aggregation Groups). A LAG group bundles N 10GE physical optical ports (N ≥ 2, as shown in ① in Figure 1). A 10GE physical optical port is a fiber optic interface, where 10GE refers to the port rate, which can reach 10 Gigabits.

[0057] This refers to the technology that combines multiple physical ports or links in the network. The aggregated logical port or link is the sum of the bandwidth of all member group ports or links. It also provides disaster recovery reliability for the network ports or links. If any one or more physical ports or links in the aggregated member group are accidentally interrupted, the bandwidth is only reduced to the sum of the bandwidth of all normal members, without causing a complete interruption of the network port or link. At the aggregation layer, SPN and PTN use UNI LAG (port or link aggregation group) for docking. That is, at the aggregation layer, multiple physical ports or links are logically combined into a single virtual interface, eliminating the need to create a separate logical channel for each physical connection, thereby increasing bandwidth, fault tolerance, and reliability.

[0058] Furthermore, the aggregation layer L2 nodes of PTN are interconnected with the aggregation layer L3 nodes of SPN according to VLAN and IP identification (5G service information is encapsulated therein).

[0059] The convergence layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link;

[0060] The convergence layer L3 node of the SPN is used to perform backhaul convergence of the 5G service information and send the 5G service information to the L3 node of the core layer of the SPN.

[0061] An L3 tunnel link uses the L3 tunneling protocol for communication. The L3 tunneling protocol refers to a technology for building virtual private networks (VPNs) within IP networks. It allows devices in different locations or subnets to connect to a single virtual network through a public network, as if they were on the same local area network. L3 tunnels are typically implemented using tunneling protocols (such as IPSec and GRE), establishing a logical tunnel between two network nodes and transmitting encrypted data packets within this tunnel. In an L3 tunnel, the source host encapsulates a data packet into a tunnel encapsulation packet and adds additional header information to create a new IP packet. This tunnel encapsulation packet is then sent to the public network where the destination host resides and transmitted across the network to the destination host. Upon receiving the tunnel encapsulation packet, the destination host decompresses it, converting it into the original data packet and delivering it to the destination host application.

[0062] The core layer L3 node of the SPN is interconnected with the 5G core network and is used to send the 5G service information to the 5G core network.

[0063] Specifically, the network egress of the core layer L3 node of the SPN and the interface of the 5G core network are interconnected in routing;

[0064] The network egress of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network.

[0065] In an embodiment of the present application, the networking structure includes: an access layer L2 node of a packet transport network PTN, an aggregation layer L2 node of the PTN, an aggregation layer L3 node of a slice packet network SPN, and a core layer L3 node of the SPN, wherein the access layer L2 node of the PTN is interconnected with the BBU on the 5G base station side, for receiving 5G service information sent by the BBU on the 5G base station side; the access layer L2 node of the PTN communicates with the aggregation layer L2 node of the PTN through an L2 tunnel link; the aggregation layer L2 node of the PTN is interconnected with the aggregation layer L3 node of the SPN, for realizing cross-network forwarding of 5G service information; the aggregation layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link; the core layer L3 node of the SPN is interconnected with the 5G core network, for sending 5G service information to the 5G core network. In this way, the base station side uses the PTN network, and interconnects the PTN and SPN at the aggregation layer. The SPN is used above the aggregation layer, so that 5G services can be carried in a mixed manner on the SPN and PTN networks, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G business development.

[0066] In some embodiments, the convergence layer L2 node of the PTN and the convergence layer L3 node of the SPN are interconnected, including:

[0067] The first LAG port of the aggregation layer L2 node of the PTN and the second LAG port of the aggregation layer L3 node of the SPN are interconnected according to VLAN and IP identification;

[0068] The first LAG port aggregates multiple physical ports of the aggregation layer L2 node of the PTN; the second LAG port aggregates multiple physical ports of the aggregation layer L3 node of the SPN.

[0069] It can be understood that the first LAG port of the PTN's aggregation layer L2 node aggregates multiple physical ports of the PTN's aggregation layer L2 node, and the second LAG port of the SPN's aggregation layer L3 node aggregates multiple physical ports of the SPN's aggregation layer L3 node, to achieve cross-network forwarding of 5G service information.

[0070] VLAN and IP identification refer to the need to perform both VLAN identification and IP identification. IP identification is to match the IP address. If the match is successful, communication can be carried out.

[0071] In the embodiment of the present application, a multi-port LAG mode is adopted to establish L2PTN and L3 SPN communication interconnection points at the aggregation layer to realize cross-network forwarding of 5G service information, so that 5G services can be carried in a mixed manner on SPN and PTN networks, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G service development.

[0072] In some embodiments, the aggregation layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link, including:

[0073] The second LAG port of the convergence layer L3 node of the SPN communicates with the network egress of the core layer L3 node of the SPN through an L3 tunnel link.

[0074] Specifically, the second LAG port of the convergence layer L3 node of the SPN communicates with the network exit of the core layer L3 node of the SPN through the L3 tunnel link, and is used to transmit 5G service information to the network exit of the core layer L3 node of the SPN. The network exit is connected to the 5G core network, so that 5G services can be carried in a mixed manner on the SPN and PTN networks, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G service development.

[0075] In some embodiments, the core layer L3 node of the SPN is interconnected with the 5G core network, including:

[0076] The network egress of the core layer L3 node of the SPN is interconnected with the interface of the 5G core network according to IP identification.

[0077] Specifically, the network exit of the core layer L3 node of the SPN and the interface of the 5G core network are interconnected in routing; the network exit of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network, thereby realizing the transmission of the 5G service data of the base station side BBU to the 5G core network, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G service development.

[0078] In some embodiments, the access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN through an L2 tunnel link, including:

[0079] The service interface of the access layer L2 node of the PTN communicates with the first LAG port of the convergence layer L2 node of the PTN through an L2 tunnel link.

[0080] The embodiment of the present application realizes end-to-end transmission of 5G service information through an L2 tunnel link.

[0081] FIG2 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG2 , the communication method includes:

[0082] Step 200: The access layer L2 node of the packet transport network PTN receives 5G service information sent by the BBU on the 5G base station side;

[0083] The access layer L2 node of the PTN is interconnected with the baseband processing unit (Building Base band Unit, BBU) on the 5G base station side, and is used to receive 5G service information sent by the BBU on the 5G base station side.

[0084] Step 201: Create an L2 tunnel link between the access layer L2 node of the PTN and the convergence layer L2 node of the PTN, and send the 5G service information to the convergence layer L2 node of the PTN through the L2 tunnel link;

[0085] Among them, the understanding of the L2 tunnel link can refer to the description in the aforementioned networking structure embodiment, which will not be repeated here.

[0086] Step 202: The convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the slice packet network SPN.

[0087] The first LAG port of the aggregation layer L2 node of the PTN and the second LAG port of the aggregation layer L3 node of the SPN are interconnected according to VLAN and IP identification;

[0088] The first LAG port aggregates multiple physical ports of the aggregation layer L2 node of the PTN; the second LAG port aggregates multiple physical ports of the aggregation layer L3 node of the SPN.

[0089] It can be understood that the first LAG port of the PTN's aggregation layer L2 node aggregates multiple physical ports of the PTN's aggregation layer L2 node, and the second LAG port of the SPN's aggregation layer L3 node aggregates multiple physical ports of the SPN's aggregation layer L3 node, to achieve cross-network forwarding of 5G service information.

[0090] VLAN and IP identification refer to the need to perform both VLAN identification and IP identification. IP identification is to match the IP address. If the match is successful, communication can be carried out.

[0091] Step 203: Create an L3 tunnel link between the convergence layer L3 node of the SPN and the core layer L3 node of the SPN, and forward the 5G service information to the core layer L3 node of the SPN through the L3 tunnel link;

[0092] Among them, the understanding of the L3 tunnel link can refer to the description in the aforementioned networking structure embodiment, which will not be repeated here.

[0093] Step 204: The core layer L3 node of the SPN forwards the 5G service information to the 5G core network.

[0094] Specifically, the network exit of the core layer L3 node of the SPN and the interface of the 5G core network are interconnected in routing; the network exit of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network, thereby realizing the transmission of the 5G service data of the base station side BBU to the 5G core network, which can effectively reduce network investment costs, achieve energy conservation and emission reduction, and meet the needs of 5G service development.

[0095] FIG3 is a schematic diagram of a service process of hybrid carrying of SPN and PTN networks provided in an embodiment of the present application.

[0096] As shown in Figure 3, the service process of hybrid SPN and PTN network bearer includes the following steps:

[0097] The base station 5G BBU service is interconnected with the access layer L2 PTN by VLAN identification (5G service information is encapsulated in it) and forwarded to the access layer L2 PTN network (A\B base station service is shown as ②③ in Figure 3);

[0098] An L2 tunnel link is created between the access layer L2 PTN and the aggregation layer L2 PTN to transmit 5G services to the aggregation layer L2 PTN (as shown in ④⑤ in Figure 3);

[0099] The aggregation layer L2 PTN and the aggregation layer L3 SPN are interconnected by VLAN and IP identification (5G service information is encapsulated in it), and the 5G service is forwarded to the aggregation layer L3 SPN (as shown in ① in Figure 3);

[0100] An L3 tunnel link is created between the aggregation layer L3 SPN and the core layer L3 SPN (building a 5G L3 VPN) to forward 5G services to the core layer L3 SPN (as shown in ⑥⑦ in Figure 3);

[0101] The core layer L3 SPN and the 5G core equipment are interconnected according to IP identification (5G service information is encapsulated therein) and forward the 5G service to the 5G core network (as shown in ⑧⑨ in Figure 3).

[0102] The communication method provided in the embodiment of the present application is based on the transmission and bearer network of the SPN+PTN system, and is responsible for the efficient transmission of 5G services across networks: the access layer L2 PTN is mainly responsible for the access of 5GBBU services, and the 5G services are backhauled and converged to the aggregation layer L2PTN through the L2 tunnel link. A communication interconnection point is created between the aggregation layer L2 PTN and the L3 SPN to forward the 5G services across networks, and then an L3 link tunnel is created from the aggregation L3 SPN to the core L3 SPN to backhaul convergence of the 5G services. Finally, a communication interconnection point is created between the core L3 SPN and the 5G core network to forward the 5G services between the SPN network and the 5G core network.

[0103] In some embodiments, the convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the SPN, including:

[0104] Connecting the first LAG port of the convergence layer L2 node of the PTN to the second LAG port of the convergence layer L3 node of the SPN;

[0105] The convergence layer L2 node of the PTN forwards the 5G service information to the second LAG port of the convergence layer L3 node of the SPN through the first LAG port;

[0106] The first LAG port of the convergence layer L2 node of the PTN and the second LAG port of the convergence layer L3 node of the SPN are interconnected according to VLAN and IP identification.

[0107] In some embodiments, the creating an L3 tunnel link between the aggregation layer L3 node of the SPN and the core layer L3 node of the SPN includes:

[0108] An L3 tunnel link is established from the second LAG port of the convergence layer L3 node of the SPN to the network egress of the core layer L3 node of the SPN.

[0109] In some embodiments, the L3 core layer of the SPN forwards the 5G service information to the 5G core network, including:

[0110] Interoperable routing between the network egress of the core layer L3 node of the SPN and the interface of the 5G core network;

[0111] The network egress of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network.

[0112] In some embodiments, creating an L2 tunnel link between an access layer L2 node of the PTN and an aggregation layer L2 node of the PTN, and sending the 5G service information to the aggregation layer L2 node of the PTN through the L2 tunnel link includes:

[0113] Establishing an L2 tunnel link from the service interface of the access layer L2 node of the PTN to the first LAG port of the convergence layer L2 node of the PTN;

[0114] The service interface of the access layer L2 node of the PTN sends the 5G service information to the first LAG port of the convergence layer L2 node of the PTN through the L2 tunnel link.

[0115] The following describes the specific parameter configurations in the above business process:

[0116] (1) Base station side BBU (5G wireless equipment):

[0117] BBU at base station A: Configure the IP address to 10.103.3.2 / 30 and VLAN ID to 222 (see step 2 in Figure 3).

[0118] BBS BBU: Configure the IP address to 10.103.3.6 / 30 and VLAN ID to 333 (as shown in Figure 3).

[0119] (2)PTN network side (PTN access layer, aggregation layer):

[0120] Base station A: Establishes a Layer 2 tunnel link from the PTN service port (interfaced with the BBU) to the LAG port of the converged PTN (interfaced with the SPN), encapsulating VLAN 222 (corresponding to the VLAN of station A) to achieve end-to-end service transmission (the service path is shown as ④ in Figure 3);

[0121] B base station: Establish a Layer 2 tunnel link from the PTN service port (interface with the BBU) to the LAG port of the converged PTN (interface with the SPN convergence), encapsulating VLAN 333 (corresponding to the VLAN of station A) to achieve end-to-end service transmission (the service path is shown as ⑤ in Figure 3).

[0122] (3) SPN network side (SPN aggregation layer, backbone layer, core layer):

[0123] Base station service: Configure the IP address 10.103.3.1 / 30 and VLAN 222 on the converged SPN LAG interface (interface with the converged PTN) (the IP and VLAN correspond to the BBU data). Establish a Layer 3 tunnel link from the converged SPN LAG interface (interface with the converged PTN) to the network egress of the core SPN (interface with the core network, this link is included in the 5G L3 VPN). This forwards the IP and other information of the wireless base station service to the network egress of the core SPN (interface with the core network) (as shown in ⑥ in Figure 3).

[0124] B base station service: Configure the IP address 10.103.3.5 / 30 and VLAN 333 on the converged SPN LAG port (interface with the converged PTN) (IP, VLAN and BBU data correspond), establish a three-layer tunnel link from the converged SPN LAG port (interface with the converged PTN) to the network egress of the core SPN (interface with the core network, this link is included in the 5G L3 VPN), and forward the IP and other information of the wireless base station service to the network egress of the core SPN (interface with the core network) (as shown in ⑦ in Figure 3).

[0125] (4) Core network-oriented (core SPN and 5G core network interconnection point)

[0126] Base station A services: Interoperate routing between the core SPN and the core network interconnection port to forward 5G services, ensuring normal communication between the 5G core and 10.103.3.1 / 30 and 10.103.3.2 / 30 (as shown in Figure 3, ⑧).

[0127] B base station service: Inter-match routing between the core SPN and the core network interconnection port to forward 5G services, ensuring normal communication between the 5G core and 10.103.3.5 / 30 and 10.103.3.6 / 30 (as shown in ⑨ in Figure 3).

[0128] Among them, ① in Figure 3 is the UNI LAG protection for the interconnection between the converged SPN and the PTN, ②③ are the connection communication points between the 5G BBU and the access L2 PTN, ④⑤ are the L2 tunnel links from the access L2 PTN to the converged L2 PTN; ⑥⑦ are the L3 tunnel links between the converged L3 SPN and the core L3 SPN; ⑧⑨ are the connection communication points between the core SPN and the 5G core network.

[0129] The networking structure and communication method provided by this application have the following specific advantages:

[0130] (1) Significant cost reduction and efficiency improvement: Compared with the construction cost of traditional 5G services carried by purely new SPN networks, this solution can reduce network construction costs by approximately 70% (access to the reusable PTN network);

[0131] (2) Significant results in energy conservation and emission reduction: This plan reduced the scale of new SPN construction by 70%, saving the energy consumption of the corresponding SPN equipment (the annual electricity cost of a single SPN device is approximately RMB 1,800);

[0132] (3) Strong applicability: It adopts a new solution of hybrid 5G transport using SPN+PTN. The relevant basic network and layout are relatively mature. Pilot applications are carried out within a certain range, which has strong adaptability and promotion.

[0133] (IV) Strong scalability: A systematic 5G service hybrid bearer solution of SPN+PTN is proposed, providing a bearer model for network transformation and development.

[0134] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0135] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A networking structure, comprising: an access layer L2 node of a packet transport network PTN, an aggregation layer L2 node of the PTN, an aggregation layer L3 node of a slice packet network SPN, and a core layer L3 node of the SPN, The access layer L2 node of the PTN is interconnected with the baseband processing unit BBU on the 5G base station side to receive 5G service information sent by the BBU on the 5G base station side; The access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN through an L2 tunnel link; The convergence layer L2 node of the PTN is interconnected with the convergence layer L3 node of the SPN to realize cross-network forwarding of the 5G service information; The convergence layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link; The core layer L3 node of the SPN is interconnected with the 5G core network and is used to send the 5G service information to the 5G core network.

2. The networking structure according to claim 1, wherein: The convergence layer L2 node of the PTN is interconnected with the convergence layer L3 node of the SPN, including: The first LAG port of the aggregation layer L2 node of the PTN and the second LAG port of the aggregation layer L3 node of the SPN are interconnected according to VLAN and IP identification; The first LAG port aggregates multiple physical ports of the aggregation layer L2 node of the PTN; the second LAG port aggregates multiple physical ports of the aggregation layer L3 node of the SPN.

3. The networking structure according to claim 1, wherein: The convergence layer L3 node of the SPN communicates with the core layer L3 node of the SPN through an L3 tunnel link, including: The second LAG port of the convergence layer L3 node of the SPN communicates with the network egress of the core layer L3 node of the SPN through an L3 tunnel link.

4. The networking structure according to claim 1, wherein: The core layer L3 node of the SPN is interconnected with the 5G core network, including: The network exit of the core layer L3 node of the SPN is interconnected with the interface of the 5G core network according to IP identification.

5. The networking structure according to claim 1, wherein: The access layer L2 node of the PTN communicates with the convergence layer L2 node of the PTN through an L2 tunnel link, including: The service interface of the access layer L2 node of the PTN communicates with the first LAG port of the convergence layer L2 node of the PTN through an L2 tunnel link.

6. A communication method based on the networking structure according to claims 1 to 5, comprising: The access layer L2 node of the packet transport network PTN receives the 5G service information sent by the BBU on the 5G base station side; Creating an L2 tunnel link between an access layer L2 node of the PTN and an aggregation layer L2 node of the PTN, and sending the 5G service information to the aggregation layer L2 node of the PTN through the L2 tunnel link; The convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the slice packet network SPN; Create an L3 tunnel link between the convergence layer L3 node of the SPN and the core layer L3 node of the SPN, and forward the 5G service information to the core layer L3 node of the SPN through the L3 tunnel link; The core layer L3 node of the SPN forwards the 5G service information to the 5G core network.

7. The communication method according to claim 6, wherein: The convergence layer L2 node of the PTN forwards the 5G service information to the convergence layer L3 node of the SPN, including: Connecting the first LAG port of the convergence layer L2 node of the PTN to the second LAG port of the convergence layer L3 node of the SPN; The convergence layer L2 node of the PTN forwards the 5G service information to the second LAG port of the convergence layer L3 node of the SPN through the first LAG port; The first LAG port of the aggregation layer L2 node of the PTN and the second LAG port of the aggregation layer L3 node of the SPN are interconnected according to VLAN and IP identification.

8. The communication method according to claim 6, wherein: The creating an L3 tunnel link between the convergence layer L3 node of the SPN and the core layer L3 node of the SPN includes: An L3 tunnel link is established from the second LAG port of the convergence layer L3 node of the SPN to the network exit of the core layer L3 node of the SPN.

9. The communication method according to claim 6, wherein: The L3 core layer of the SPN forwards the 5G service information to the 5G core network, including: Interoperable routing between the network egress of the core layer L3 node of the SPN and the interface of the 5G core network; The network exit of the core layer L3 node of the SPN forwards the 5G service information to the interface of the 5G core network.

10. The communication method according to claim 6, wherein: Creating an L2 tunnel link between an access layer L2 node of the PTN and an aggregation layer L2 node of the PTN, and sending the 5G service information to the aggregation layer L2 node of the PTN through the L2 tunnel link, including: Establishing an L2 tunnel link from the service interface of the access layer L2 node of the PTN to the first LAG port of the convergence layer L2 node of the PTN; The service interface of the access layer L2 node of the PTN sends the 5G service information to the first LAG port of the aggregation layer L2 node of the PTN through the L2 tunnel link.

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