WO2011116662A1 - Ethernet service intercommunication method and apparatus - Google Patents

Abstract

An Ethernet service intercommunication method and apparatus are provided in the present invention. The method includes: the Ethernet service intercommunication between the Multi-Service Transport Platform (MSTP) and the Package Transport Network (PTN) is implemented through the Virtual Container Group (VCG) interface, wherein the VCG interface is a logic interface consisting of multiple Virtual Container (VC) sub-channels. With the present invention, the Ethernet service intercommunication between the MSTP network and the PTN network can be implemented, and thereby the operation cost of the network is reduced.

Description

 Ethernet service interworking method and device

 The present invention relates to the field of communications, and in particular, to an Ethernet service interworking method and apparatus. Background technique

 In the context of the evolution of the network to all-IP, the service control of various networks is gradually shifting to the IP-based conditions. In order to achieve efficient bearer for upper-layer services, the transport network from the MSTP (Multi-service transport platform) The evolution of the platform to the PTN (Package Transport Network) is a general trend.

 The PTN network provides one of the best performance, compatible with Ethernet, Asynchronous Transfer Mode (Async Mode), SDH (Synchronous Digital Hierarchy), PDH (Plesiochronous Digital Hierarchy), PPP (Point- To-Point Protocol, high-level data link control (HDC), unified relay platform for various technologies such as frame relay, eliminating the diversity of network construction types, and replacing them with With the diversity of interface types, the original network devices, such as ATM switches, Ethernet switches, and PDH optical transceivers, can be interconnected through the PTN network, or directly replaced by the PTN ATM interface, Ethernet interface, and PDH interface.

 However, there are a large number of MSTP networks, and how to implement interworking between the newly built PTN network and the existing MSTP network is a technical problem that needs to be solved.

In summary, it can be seen that in the prior art, there has been a problem that the technology of the MSPT network and the PTN network service cannot be effectively interworked for a long time, and therefore it is necessary to propose an improved technical means to solve the problem. Summary of the invention

 The present invention is proposed in view of the problem that the existing MSPT network and the PTN network service cannot be effectively interworked in the prior art, and the interworking between the Ethernet service between the MSTP network and the PTN network can be realized, and the network operation cost is reduced.

 The Ethernet service interworking method and device provided by the present invention are specifically:

 The Ethernet service interworking method according to the embodiment of the present invention includes: implementing the Ethernet service interworking between the multi-service transport platform MSTP and the packet-switched network PTN by using a virtual container group VCG interface manner, where the VCG interface is composed of multiple virtual container VC sub-channels The logical interface that makes up.

 Preferably, on the user network interface side, the Ethernet service interworking between the MSTP and the PTN is implemented by using the VCG interface, and the method further includes: mapping the MSTP Ethernet service encapsulated in the SDH frame format to the VCG, and mapping the packet to the pseudowire according to the VCG. Access the PTN for the VPLS frame format.

 Preferably, the SDH frame format includes: a user, a GFP, a VC4, a VC12, and an STM-N; and the VPLS frame format includes: a D-MAC, an S-MAC, a pseudowire, and a user.

 Preferably, on the network network interface side, the Ethernet service interworking between the MSTP and the PTN is implemented by using the VCG interface, and the method further includes: mapping the PTN Ethernet service encapsulated in the VPLS frame format to the VCG, and converting to the MSTP frame format according to the VCG. Enter MSTP.

 Preferably, the VPLS frame format includes: D-MAC, S-MAC, VLAN ID, tunnel label, pseudowire label, user 4艮 text; SDH frame format includes: user ^艮文, GFP, VC4, VC12, STM-N , tunnel labels, pseudowires.

 The Ethernet service interworking device according to the embodiment of the present invention includes: a first conversion module, configured to convert an MSTP Ethernet service into a PTN Ethernet service by using a VCG interface, and a second conversion module, configured to convert the PTN Ethernet service into a VCG interface MSTP Ethernet business.

Preferably, the first conversion module further includes: a first mapping submodule, configured to map an MSTP Ethernet service encapsulated in an SDH frame format to a VCG; and a first encapsulation submodule, configured to map to a VPLS according to the VCG mapping to the pseudowire The frame format is connected to the PTN. Preferably, the SDH frame format includes: a user, a GFP, a VC4, a VC12, and an STM-N; and the VPLS frame format includes: a D-MAC, an S-MAC, a pseudowire, and a user.

 Preferably, the second conversion module further includes: a second mapping sub-module, which maps the PTN Ethernet service encapsulated in the VPLS frame format to the VCG; and a second encapsulation sub-module, configured to access the MSTP according to the VCG conversion to the MSTP frame format.

 Preferably, the VPLS frame format includes: D-MAC, S-MAC, VLAN ID, tunnel label, pseudowire label, user 4艮 text; SDH frame format includes: user ^艮文, GFP, VC4, VC12, STM-N , tunnel labels, pseudowires.

 Compared with the prior art, according to the above technical solution of the present invention, the MSTP network is used as the reference point of the PTN network, and the MSTP network is used as the UNI side or the NNI side of the PTN network to implement the Ethernet service between the MSTP network and the PTN network. Interoperability reduces network operating costs. DRAWINGS

 1 is a schematic diagram of a U I side networking of an MSTP network as a PTN network according to an embodiment of the present invention;

 2 is a schematic diagram of an NTP side networking of an MSTP network as a PTN network according to an embodiment of the present invention;

 3 is a flowchart of an Ethernet service interworking method according to an embodiment of the present invention;

 4 is a schematic diagram of format conversion of a U I side message according to an embodiment of the present invention;

 FIG. 5 is a schematic diagram of a format conversion of a N I side message according to an embodiment of the present invention; FIG.

 6 is a block diagram of an Ethernet service interworking device in accordance with an embodiment of the present invention. detailed description

The invention realizes the interworking of the Ethernet service between the MSTP network and the PTN network, and uses the PTN network as a reference point, and can access the MSTP network as the UNI (user network interface) side of the PTN network, or can use the MSTP network as the PTN network. NI (network network interface) side connection In. Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of an MSTP network as a UI side networking of a PTN network according to an embodiment of the present invention. FIG. 2 is a schematic diagram of an NTI side networking of an MSTP network as a PTN network according to an embodiment of the present invention. As shown in Figure 1, user equipments A and B are connected to the existing MSTP network, and the MSTP network is aggregated to the PTN network. For the PTN network, the MSTP network is accessed as a UNI device. As shown in Figure 2, user equipments A and B are connected to the newly created PTN network, and the PTN network is aggregated to the existing MSTP network. For the PTN network, the MSTP network is accessed as an NI device.

 The present invention will be further described in detail below with reference to the drawings and specific embodiments.

 According to an embodiment of the present invention, an Ethernet service interworking method is provided.

 The present invention implements Ethernet service interworking between the MSTP network and the PTN network through a VCG (Virtual Container Group) interface. The VCG interface is a logical interface composed of multiple virtual container (VC) sub-channels.

 FIG. 3 is a flowchart of an Ethernet service interworking method according to an embodiment of the present invention. As shown in FIG. 3, the method includes:

 Step S302: On the U I side, the MSTP Ethernet service encapsulated in the SDH frame format is mapped to the VCG, and the PTN is accessed in the VPLS frame format according to the VCG mapping to the pseudowire.

 Step S304: On the NNI side, the PTN Ethernet service encapsulated in the VPLS frame format is mapped to the VCG, and the MSTP is converted into the MSTP frame format according to the VCG.

 Details of each of the above processes are described in detail below.

 (a) Step S302

FIG. 4 is a schematic diagram of a format conversion of a UI side message according to an embodiment of the present invention. The service that enters the MSTP network enters the PTN network through the VCG interface. After the pseudowire is added, the tunnel is transmitted. After the label is detached, the restored service is placed on the VCG interface and transmitted to the peer. Among them, VCG extracts several VC sub-channels from synchronous transmission module 1 (STM-1) to form a logical interface. The processing steps of the MSTP as the UNI side of the PTN specifically include:

 Step 1: The Ethernet service of the MSTP network is accessed from the STM port of the method, and is uniformly encapsulated into an SDK frame format, including VC4, VC12, GFP (Generic Framing Procedure) and user packets.

 Step 2, extracting SDH frame header information, respectively mapping to different VCGs;

 Step 3: mapping the VCG to a pseudowire and encapsulating it into an MPLS frame format, including an outer DMAC, a SMAC, a pseudowire, and a user interface;

 Step 4: The service accesses the PTN device according to the pseudowire, and forwards according to the DMAC of the Ethernet service in the VSI (Virtual Switching Instance).

 (ii) Step S304

 FIG. 5 is a schematic diagram of a format conversion of a N I side message according to an embodiment of the present invention. The service with the pseudowire and tunnel label in the PTN network enters the MSTP network through the VCG interface for transmission and is sent to another node of the PTN network. The processing steps of the MSTI as the NNI side of the PTN specifically include: Step 1: The PTN network Ethernet service enters the PTN device and is encapsulated into an MPLS frame format, including an outer destination medium access address (D-MAC) and a source medium access address (S- MAC), a virtual Ethernet identifier (VLAN ID) used to distinguish the VCG number, and a tunnel label, a pseudowire label, and a user packet;

 Step 2: The method distinguishes the VCG number according to the outer VLAN ID.

 Step 3: Map the VCG to the corresponding VC4/VC12 and encapsulate the frame format into MSTP. Step 4: The service accesses the MSTP network and forwards the packet.

 According to the above technical solution of the present invention, the interworking of the Ethernet services between the MSTP network and the PTN network is realized, and the network operation cost is reduced. Device embodiment

 According to an embodiment of the present invention, an Ethernet service interworking device is further provided.

6 is a block diagram of an Ethernet service interworking device according to an embodiment of the present invention, as shown in FIG. The device includes:

 The first conversion module 10 is configured to convert the MSTP Ethernet service into the PTN Ethernet service by using the VCG interface, and the second conversion module 20 is configured to convert the PTN Ethernet service into the MSTP Ethernet service by using the VCG interface.

 Specifically, the first conversion module 10 further includes: a first mapping submodule, configured to map an MSTP network Ethernet service encapsulated in an SDH frame format to a VCG, where the first encapsulation submodule is configured to be mapped to a pseudowire according to the VCG Access the PTN network for the VPLS frame format.

 The second conversion module 20 further includes: a second mapping sub-module, which maps the PTN network Ethernet service encapsulated in the VPLS frame format to the VCG, and the second encapsulation sub-module is configured to access the MSTP network according to the VCG conversion to the MSTP frame format.

 In summary, according to the above technical solution of the present invention, the MSTP network is used as the reference point of the PTN network, and the MSTP network is used as the UI side or the NI side of the PTN network to implement the interworking of the Ethernet services between the MSTP network and the PTN network. Network operating costs.

 The above is only the embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. All modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

Claim  An Ethernet service interworking method, characterized in that the method comprises:  The virtual service group platform VCG interface is used to implement Ethernet service interworking between the MSTP and the packet switching network PTN. The VCG interface is a logical interface composed of multiple virtual container VC sub-channels.  The method according to claim 1, wherein, on the user network interface side, the Ethernet service interworking between the MSTP and the PTN is implemented by using the VCG interface, including:  The MSTP Ethernet service encapsulated in the SDH frame format is mapped to the VCG, and is encapsulated into a VPLS frame format to access the PTN according to the VCG mapping to the pseudowire.  The method according to claim 2, wherein the SDH frame format comprises: a user message, a general framing procedure GFP, a virtual container VC4, a VC12, a synchronous transmission module STM-N; the VPLS frame format Including: destination media access address D-MAC, source media access address S-MAC, pseudowire, user 4 text.  The method according to claim 1, wherein, on the network network interface side, the Ethernet service interworking between the MSTP and the PTN is implemented by using the VCG interface:  The PTN Ethernet service encapsulated in the VPLS frame format is mapped to the VCG, and the MSTP is converted to the MSTP frame format to access the MSTP.  The method of claim 4, wherein the VPLS frame format includes: a D-MAC, an S-MAC, a virtual Ethernet identifier, a VLAN ID, a tunnel label, a pseudowire label, and a user packet.  The SDH frame format includes: a user, a GFP, a VC4, a VC12, an STM-N, a tunnel label, and a pseudowire.  An Ethernet service interworking device, the device comprising: a first conversion module and a second conversion module; The first conversion module is configured to convert an MSTP Ethernet service into a VCG interface manner. PTN Ethernet business;  The second conversion module is configured to convert the PTN Ethernet service into an MSTP Ethernet service by using a VCG interface.  The apparatus according to claim 6, wherein the first conversion module further comprises: a first mapping sub-module and a first packaging sub-module;  The first mapping submodule is configured to map an MSTP Ethernet service encapsulated in an SDH frame format to the VCG;  The first encapsulation submodule is configured to access the PTN according to the VCG mapping to a pseudowire and then encapsulating into a VPLS frame format.  The device according to claim 7, wherein the SDH frame format comprises: a user, a GFP, a VC4, a VC12, an STM-N;  The VPLS frame format includes: a D-MAC, an S-MAC, a pseudowire, and a user packet.  The apparatus according to claim 6, wherein the second conversion module further comprises: a second mapping sub-module and a second packaging sub-module;  The second mapping sub-module maps the PTN Ethernet service encapsulated in a VPLS frame format to the VCG;  The second encapsulation submodule is configured to access the MSTP according to the VCG converted into an MSTP frame format.  The device according to claim 9, wherein the VPLS frame format includes: a D-MAC, an S-MAC, a VLAN ID, a tunnel label, a pseudowire label, and a user identifier;  The SDH frame format includes: a user, a GFP, a VC4, a VC12, an STM-N, a tunnel label, and a pseudowire.