WO2009021376A1

WO2009021376A1 - Ethernet device and ethernet affair processing method based on the sdh

Info

Publication number: WO2009021376A1
Application number: PCT/CN2007/003935
Authority: WO
Inventors: Chunlai Cui
Original assignee: Zte Corporation
Priority date: 2007-08-15
Filing date: 2007-12-29
Publication date: 2009-02-19
Also published as: CN100568842C; CN101141350A

Abstract

An Ethernet device and Ethernet affair processing method based on the SDH, the device includes Ethernet affair processing unit, synchronous digital hierarchy cluster-Road processing unit, cross-connect processing unit; Ethernet affair processing unit performs the physical layer processing and MAC layer processing for the received 10G Ethernet affair data, and after performs the encoding and virtual containers mapping for the data which has been processed, outputs it; synchronous digital hierarchy cluster-Road processing unit through the cross-connect processing unit to receive Ethernet affair processing unit output of 10G Ethernet services to the SDH mapping the data ,and performs the overlap segment spending process and the renewable segment spending process for the data, then sends it to the synchronous digital hierarchy network. The device and method make the 10G Ethernet affair encode and decode at 64b/66b part of the package, such as GFP coding replaced, so that the EOS equipment will be more flexible, 10G Ethernet access will be more efficient, and smaller delay.

Description

Ethernet device based on the same digital series and its Ethernet service processing method

Technical field

The present invention relates to an Ethernet device based on a synchronous digital series and an Ethernet service processing method. .

Background technique

In recent years, with the rapid development of data services, metropolitan transport networks have become the key to telecom operators to expand their subscriber markets and enhance their service offering capabilities. At the same time, voice and TDM (Time Division Multiplexing) leased line services remain the main source of revenue for operators. Therefore, how to provide the transmission and processing functions of data services while ensuring the transmission of TDM services is a market development demand. Therefore, MSTP (Multi-Service Transport Platform) technology based on SDH (Synchronous Digital Hierarchy) has emerged as a mainstream solution for metro optical transport networks. EOS (Ethernet Over SDH, SDH-based Ethernet) technology is one of the development directions.

The SDH-based MSTP functional model block diagram proposed by the People's Republic of China communication industry standard YD/T5119-2005 is shown in Figure 1. Multiple services are transmitted from different paths to the SDH ring network: PDH (Quasi-Synchronous Digital Hierarchy) service passes PDH The interface is mapped to the VC (Virtual Container); the ATM (Asynchronous Transfer Mode) service is mapped into the VC container after being processed by the ATM interface and the ATM layer; the Ethernet service can be switched through the Layer 2 switch or pass through the RPR (Resilient Packet Ring) MAC ( Medium access control) layer processing or MPLS (multi-protocol label switching) processing or pass-through, then select one of HDLC (Advanced Data Link Control) / LAPS (Link Access Procedure) / GFP (General Framing Procedure) The format is encapsulated and finally mapped into the VC container. After the various services are mapped into the VC container, all VC containers can be sent from the STM-N (Synchronous Transport Module Level N) interface to the SDH network after being processed by cross-connection and segment overhead. on. It can also be processed in the opposite direction to receive various types of services from the SDH network.

It can be seen that the EOS (one of the paths for processing Ethernet services) model is shown in Figure 2. The Ethernet service can be encapsulated or directly through Layer 2 switching or pass-through, and then encapsulated and mapped in one of the HDLC/LAPS/GFP encapsulation formats. Into the VC container, then through cross-connection, segment overhead processing (complex It is processed by segment overhead and regenerative segment overhead), and finally sent from the STM-N port to the SDH network. It can also be processed in the opposite direction to receive Ethernet traffic from the SDH network.

On the whole, the above structure is more reasonable when the Ethernet traffic is not very large, and the operation is relatively stable. However, with the continuous development of Ethernet technology and applications, especially after the emergence of 10G Ethernet services, if the existing structure is continued, a large amount of overhead and encapsulation processing will waste a lot of bandwidth and become inefficient. The cache is increased and the delay is increased. Therefore, it is very necessary to adopt a new processing method for 10G Ethernet services.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and propose an EOS device and an Ethernet service processing method that can improve the S efficiency of the 10G Ethernet service.

In order to solve the above problems, the present invention provides an Ethernet device based on a synchronous digital series, comprising an Ethernet service processing unit, a synchronous digital series group processing unit, and a cross-connect processing unit; wherein: the Ethernet service processing unit It is used for performing physical layer processing and mediation access control layer processing on the received 10G Ethernet service data, and encoding and processing the processed data and outputting the virtual container;

The synchronous digital series group processing unit is configured to receive, by the cross-connect processing unit, data that is mapped into the SDH by the 10G Ethernet service output by the Ethernet service processing unit, and perform multiplexing section overhead processing and regeneration section on the data. The overhead is processed and sent to the synchronous digital series network.

In addition, the Ethernet service processing unit includes: an Ethernet interface, an encoding module, and a virtual container mapping module; the synchronous digital series group processing unit includes: a multiplexing segment overhead processing module, a regeneration segment overhead processing module, and an STM -64 interface; where:

The Ethernet interface is configured to receive the 10G Ethernet service data, and perform the physical layer processing and the medium access control layer processing on the output;

The encoding module is configured to encode and output 10G Ethernet service data output by the Ethernet interface; The first virtual container mapping module is configured to map the encoded 10G Ethernet service data to a cascaded virtual container and output the same;

The multiplex section overhead processing module and the regenerator section overhead processing module are configured to perform multiplex section overhead processing on data that is mapped into the SDH by the 10G Ethernet service received by the cross-connection processing unit from the Ethernet service processing unit. After the regeneration segment overhead processing, the STM-64 interface is sent to the synchronous digital series network.

In addition, the encoding module performs 64b/66b encoding on the 10G Ethernet service data; the cascaded virtual container is a VC-4-64C virtual container.

In addition, the Ethernet service processing unit is further configured to receive 10/100/1000 M Ethernet service data; the Ethernet service processing unit further includes: a package module, a second virtual container mapping module, a first backplane interface; and a synchronous digital series The group processing unit further includes a second backplane interface, an STM-N interface, where: the encapsulating module is configured to perform 10/100/1000 M Ethernet service data processed by the physical layer processing and the interface access control layer. Output after GFP/HDLC/LAPS package;

The second virtual container mapping module is configured to map the 10/100/1000 M Ethernet service data output by the encapsulating module to the virtual container VC12, VC3, or VC4, and output the same;

The first backplane interface is configured to output data output by the second virtual container mapping module to the second backplane interface in the synchronous digital series group processing unit through the cross connection processing unit; The processing unit transmits the 10/100/1000 M Ethernet service data received from the second backplane interface and processed through the multiplex section overhead processing and the regenerator section overhead to the synchronous digital series network through the STM-N interface.

In addition, the first virtual container mapping module outputs the 10G Ethernet service data to the VC-4-64C virtual container after being byte-interleaved or non-interleaved.

In addition, the Ethernet service processing unit further includes a Layer 2 switching module, configured to perform Layer 2 switching processing on the Ethernet service data processed by the medium access control layer.

In addition, the cross-connect processing unit performs overall electrical power on the VC-4-64C virtual container. The circuit exchange transmits data output by the Ethernet service processing unit to the synchronous digital series group processing unit.

The invention also provides an Ethernet device based on a synchronous digital series, comprising an Ethernet service processing unit, a synchronous digital series group processing unit, and a cross-connect processing unit; wherein: the synchronous digital series group processing unit is used for Receiving data after the 10G Ethernet service is mapped into the SDH network from the synchronous digital series network, and performing the regeneration segment overhead processing and the multiplexing segment overhead processing on the data;

The Ethernet service processing unit is configured to perform demapping and de-encoding the data received by the cross-connect processing unit from the synchronous digital series group processing unit, and then perform the access control layer processing and the physical layer processing. Output to an Ethernet switching network.

In addition, the Ethernet service processing unit includes: an Ethernet interface, a decoding module, and a first virtual container demapping module; the synchronous digital series group processing unit includes: a multiplexing segment overhead processing module, and a regeneration segment overhead processing module. , STM-64 interface; where:

The regenerator section overhead processing module and the multiplex section cost processing module are configured to perform regenerator section overhead processing and multiplex section overhead processing on data received from the synchronous digital series network through the STM-64 interface, and process the processed Data is output to the Ethernet service processing unit through the cross-connect processing unit;

The first virtual container demapping module is configured to perform demapping on the data processed by the multiplex section overhead and output the data;

The decoding module is configured to perform de-encoding and outputting data output by the first virtual container demapping module;

The Ethernet interface is configured to perform the medium access control layer processing and the physical layer processing on the 10G Ethernet service data output by the de-encoding module and output to the Ethernet switching network.

In addition, the de-encoding module performs 64b/66b de-encoding on the data output by the first virtual container demapping module; the first virtual container demapping module maps the 10G Ethernet service into the SDH. The data after the network is subjected to VC-4-64C virtual container demapping.

In addition, the synchronous digital series group processing unit is further configured to receive data after the 10/100/1000 M Ethernet service is mapped into the SDH network; the Ethernet service processing unit further includes: a second virtual container demapping module, and a decapsulation module The first backplane interface; the synchronous digital series group processing unit further includes a second backplane interface, an STM-N interface; wherein:

The synchronous digital series group processing unit performs the regeneration segment overhead processing and the multiplex section overhead processing on the data received from the synchronous digital series network through the STM-N interface, and then outputs the data through the second backplane interface;

The first backplane interface is configured to receive data from the second backplane interface by using the cross-connect processing unit, and send the first virtual container demapping module or the second virtual container demapping module according to the configuration;

The second virtual container demapping module is configured to demap the received data and output the data; the decapsulation module is configured to perform GFP/HDLC/LAPS decapsulation output on the data output by the second virtual container demapping module. The medium access control layer processing and the physical layer processing are performed on the Ethernet interface, and then output to the Ethernet switching network.

In addition, if the received 10G Ethernet service data adopts a byte interleave mapping manner, the first virtual container demapping module demaps it using byte interleaving.

In addition, the Ethernet service processing unit further includes a Layer 2 switching module, configured to perform Layer 2 switching processing on the Ethernet service data output by the decapsulation module or the decoding module.

In addition, the cross-connect processing unit transmits data output by the synchronous digital series group processing unit to the first virtual container demapping module by performing overall circuit switching on the VC-4-64C virtual container.

The present invention also provides an Ethernet service processing method for an Ethernet device based on a synchronous digital series, characterized in that the method comprises the following steps: A: Perform physical layer processing and mediation access control layer processing on the received 10G Ethernet service data;

B: Encoding and virtual container mapping of 10G Ethernet service data processed by physical layer processing and medium access control layer;

C: The data output after the coding and virtual container mapping is output to the synchronous digital series group processing unit through circuit switching for multiplex section overhead processing and regenerator section overhead processing, and then sent to the synchronous digital series network.

In addition, in step B, the 10G Ethernet service data is 64b/66b encoded and mapped into the VC-4-64C virtual container.

In addition, the 10G Ethernet service data is mapped into the VC-4-64C virtual container using byte interleaving or non-interleaving.

In addition, in step C, the circuit switching is an overall circuit switching of the VC-4-64C virtual container. -

The present invention also provides an Ethernet service processing method for an Ethernet device based on a synchronous digital series, characterized in that the method comprises the following steps:

a) performing regenerator section overhead processing and multiplex section overhead processing on data received from the synchronous digital series network;

b) circuit-switching the data processed by the regenerative section overhead processing and the multiplex section overhead processing; c) performing virtual container de-mapping and de-encoding according to the configuration, performing media access control layer processing and physical layer processing, and outputting to the Ethernet Exchange network.

In addition, in step c), VC-4-64C virtual container de-embedding and 64b/66b de-encoding are performed on the 10G Ethernet service data.

In addition, in step c), if the received 10G Ethernet service data adopts the byte interleave mapping mode, it is demapped using byte interleaving.

In addition, in step b), if the Ethernet service data is 10G Ethernet service data, the Circuit switching is the overall circuit switching for the VC-4-64C virtual container.

Compared with the prior art, the method of the present invention replaces the GFP/HDLC/LAPS package with 64b/66b encoding/decoding for the 10G Ethernet service, and provides a method for accessing the 10G Ethernet service to the SDH network. To make EOS devices more flexible, 10G Ethernet access is more efficient and the latency is smaller. The problem of inefficiency and increased delay caused by GFP/HDLC/LAPS encapsulation is avoided. The device and method of the present invention can handle 10/100/1000M Ethernet service and have Layer 2 switching in addition to the 10G Ethernet service, when the functional unit of the GFP/HDLC/LAPS package is set. When functioning, it can also realize the interworking of 10G Ethernet services and 10/100/1000M Ethernet services.

BRIEF abstract

1 is a block diagram of an SDH-based MSTP function model in the prior art;

2 is a block diagram of a functional model of an EOS device in the prior art;

3 is a schematic structural diagram of an Ethernet device based on a synchronous digital series according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of an Ethernet service processing unit in an EOS device according to an embodiment of the present invention; and FIG. 5 is an SDH in an EOS device according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a group processing unit; FIG. 6 is a schematic structural diagram of an EOS apparatus according to an embodiment of the present invention;

7 is a schematic structural diagram of a cross-connect processing unit simultaneously connected to multiple Ethernet service processing units and an SDH group processing unit according to an embodiment of the present invention;

8 is a processing method for an EOS device to send a 10G Ethernet service to an SDH network according to an embodiment of the present invention; FIG. 9 is a flowchart of a method for processing an EOS device to receive 10G Ethernet service data from an SDH network according to an embodiment of the present invention; In the embodiment of the invention, the EOS device sends a 10/100/1000 M Ethernet service to the processing method on the SDH network; FIG. 11 is a flowchart of a method for receiving 10/100/1000 M Ethernet service data from an SDH network according to an embodiment of the present invention. Preferred embodiment of the invention

The invention will now be described in detail in conjunction with the drawings and embodiments.

According to the traffic, Ethernet services are mainly divided into 10M, 100M, 1000M and 10G. The object of the present invention is to provide an EOS device suitable for processing 10G Ethernet services, which overcomes the disadvantages of continuing to adopt the current architecture for handling 10G Ethernet, such as inefficiency and increased buffer delay, and corresponding Ethernet services. Approach.

The invention mainly proposes a new EOS framework according to the characteristics of 10G Ethernet itself, which can not only process 10G Ethernet services, but also process 10M, 100M and 1000M Ethernet services at the same time. '

FIG. 3 is a schematic structural diagram of an Ethernet device based on a synchronous digital series according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes: an Ethernet service processing unit 301, a cross-connect processing unit 302, and an SDH group processing unit 303. among them:

The Ethernet service processing unit 301 is mainly responsible for performing Ethernet PHY (physical) layer processing and Ethernet MAC (Media Access Control) layer processing on the Ethernet service data, and mapping to VC through different mapping paths ( In the virtual container).

Specifically, the Ethernet service processing unit performs different processing and VC mapping according to different Ethernet service traffic: if it is a 10G Ethernet service, it performs 64b/66b encoding, and then maps into a VC-4-64C container (by In 64 VC-4 container cascades; if it is 10/100/1000M Ethernet service, it is packaged in one format of GFP/HDLC/LAPS, and then encapsulated into VC12, VC3 or VC4 after encapsulation. After the VC mapping is completed, the mapped data is transmitted to the cross-connect processing unit 302 through the backplane; or processed in the reverse direction, and the received services are demapped or de-encoded according to different paths, specifically, decapsulation or de-encoding, specifically The backplane interface distinguishes whether the payload content is 10G Ethernet service or 10M/100M/1000M Ethernet service according to the channel overhead (for example, the C2 byte of the SDH frame). If it is a 10GE service, the VC-4-64C demapping is performed. , then 64b/66b de-encoding; if it is 10M/100M/1000M Ethernet service, it will be decoded Shooting, then decapsulating, and finally performing MAC layer processing and PHY layer processing on the decoded or decapsulated services.

The cross-connect processing unit 302 is connected to the Ethernet service processing unit 301 and the SDH group processing unit 303, and is mainly responsible for circuit switching between the two units, that is, receiving data sent by the two units, and then configuring according to the configuration. , circuit switching between the two units.

The SDH group processing unit 303 is mainly responsible for performing SDH segment overhead processing on the data sent by the cross-connection processing unit 302, including multiplexing segment overhead processing and regeneration segment overhead processing, and then transmitting the data to the SDH network; or performing reverse processing: The service in the SDH network is received, subjected to regenerative segment and multiplex section overhead processing, and then sent to the cross-connect processing unit 302.

FIG. 4 is a schematic structural diagram of an Ethernet service processing unit in an EOS device according to an embodiment of the present invention. As shown in FIG. 4, the Ethernet service processing unit includes: an Ethernet interface 411, a VC-4-64C mapping/demapping module 412, a Layer 2 switching module 413, an encapsulation/decapsulation module 414, and a VC mapping/demapping module 415. Encoding/decoding module 416.

The encoding/decoding module 416 and the VC-4-64C mapping/demapping module 412 are configured to process 10G Ethernet services; the encapsulation/decapsulation module 414 and the VC mapping/demapping module 415 are mainly used to process 10M, 100M, and The Layer 2 switching module 413 is mainly used for Layer 2 switching processing of Ethernet services. specifically:

The Ethernet interface 411 is configured to receive local Ethernet services, and perform Ethernet PHY layer processing and Ethernet MAC layer processing on the Ethernet service.

The Layer 2 switching module 413 is configured to perform Layer 2 switching processing on the Ethernet service to implement interworking between the 10/100/1000 M Ethernet service and the 10 Gigabit Ethernet service.

The encapsulation/decapsulation module 414 is configured to encapsulate/decapsulate the 10M/100/1000M Ethernet service, and the method of encapsulation processing includes HDLC; LAPS or GFP;

The VC mapping/demapping module 415 is configured to perform mapping/demapping of the 10M, 100M, and 1000M Ethernet service data after the encapsulation; and the encoding/decoding module 416 is configured to perform encoding/decoding processing on the 10G Ethernet service; The VC-4-64C mapping/demapping module 412 is configured to perform mapping/decoding of 10G Ethernet services. Shot processing.

FIG. 5 is a schematic structural diagram of an SDH group path processing unit in an EOS device according to an embodiment of the present invention. As shown in FIG. 5, the SDH group processing unit includes: a multiplex section overhead processing module 531, a regenerator section overhead processing module 532, an STM-N (synchronous transmission module level N) interface 533, and an STM-64 (synchronous transmission module level 64). ) interface 534. among them:

The multiplex section cost processing module 531 is configured to perform overhead processing on the multiplex section of the Ethernet service; the regenerator section overhead processing module 532 is connected to the multiplex section overhead processing module 531, the STM-N interface 533, and the STM-64 interface 534. Used for overhead processing of the Ethernet service regeneration segment;

The STM-N interface 533 is configured to send 10M/100/1000M Ethernet service data processed by the regenerative segment overhead processing module 532 to the SDH network, and receive 10M/100/1000M Ethernet service data on the SDH network for transmission to the regeneration. Segment overhead processing module 532;

The STM-64 interface 534 is configured to send the 10G Ethernet service data processed by the regenerator section overhead processing module 532 to the SDH network, and receive the 10G Ethernet service data on the SDH network and send it to the regenerator section overhead processing module 532. .

In a specific implementation, there may be more than one STM-N interface 533 and STM-64 interface 534 in SDH group processing unit 303.

FIG. 6 is a schematic diagram of the complete structure of an EOS device according to an embodiment of the present invention.

In the Ethernet service processing unit 301, the data stream processed by the VC-4-64C mapping/demapping module 412 and the VC mapping/demapping module 415 is processed by the Ethernet service processing unit side backplane interface 601, and then The data is sent to the cross-connection processing unit 302 for exchange processing; after receiving the data output by the cross-connection processing unit 302, it is sent to the VC-4-64C mapping/demapping module 412 according to the configuration, or sent to the VC mapping demapping module 415.

In the SDH group processing unit 303, the Ethernet service exchanged by the cross-connection processing unit 302 is processed by the backplane interface 602 on the SDH group processing unit side, and then the reciprocating segment overhead processing module 531 is regenerated. Segment overhead processing module 532, then through the STM-N interface Or the STM-64 interface is sent to the SDH network; in the reverse process, the SDH group processing unit 303 receives data from the SDH network through the STM-N interface and/or the STM-64 interface, and then passes through the regenerator section overhead processing module 532 and The overhead processing of the segment overhead processing module 531 is finally sent to the cross processing unit 302 through the backplane interface 602.

FIG. 7 is a schematic structural diagram of a cross-connect processing unit connected to multiple Ethernet service processing units and an SDH group processing unit at the same time according to an embodiment of the present invention.

A cross-connect processing unit 302 can be connected to a plurality of Ethernet service processing units 301 and a plurality of SDH group processing units 303 at the same time according to different backplane interfaces and system sizes. As shown in FIG. 7, a cross-connect processing unit 302 is simultaneously connected to M Ethernet service processing units and N SDH group processing units. The M Ethernet service processing units are identified by 1 to M, and the N SDH group processing units are identified by 1 to N respectively.

FIG. 8 is a schematic diagram of a method for processing an EOS device to send a 10G Ethernet service to an SDH network according to an embodiment of the present invention, which is referred to as a forward processing of a 10G Ethernet service, and includes the following steps:

Step 801: Receive a data signal of a 10G Ethernet service through an Ethernet interface, perform PHY layer processing, and perform Layer 2 MAC layer processing;

Specifically, the Ethernet service is processed by the Ethernet PHY layer to be converted into data receivable by the Ethernet MAC layer, and then processed by the Layer 2 MAC layer; if the Layer 2 switching function is performed, the Ethernet service enters after the Layer 2 MAC layer processing. The Layer 2 switching module performs switching processing;

Step 802: After 64b/66b encoding the Ethernet data, mapping the data into the VC-4-64C virtual container, in the mapping process, whether to use byte interleaving; Step 803, mapping through the backplane interface After the data is converted into data that can be received by the cross-connect processing unit, the data is sent to the cross-connect processing unit;

Step 804: After receiving the data sent by the Ethernet service processing unit, the cross-connect processing unit performs circuit switching according to the configuration. After the circuit switching, the data is sent to the SDH group processing unit. Step 805, the SDH group processing unit Receiving data from the cross-connect processing unit After that, the multiplex section and the regenerative section overhead processing are performed, and then sent to the corresponding STM-64 interface, and sent to the SDH network backup.

FIG. 9 is a schematic diagram of a method for processing an EOS device to receive 10G Ethernet service data from an SDH network according to an embodiment of the present invention, which is referred to as reverse processing of a 10G Ethernet service, and includes the following steps:

Step 901: The SDH group processing unit performs a regenerator section and a multiplexing section overhead processing on the data received from the SDH network through the STM-64 interface.

Step 902: The SDH group processing unit sends data to the cross-connect processing unit through the backplane interface, and performs circuit switching according to the configuration in the cross-connect processing unit.

Step 903: The Ethernet service processing unit receives the data sent by the cross-connection processing unit through the backplane interface.

Step 904: The Ethernet service processing unit demaps the data by using a VC-4-64C mapping/demapping module, and then performs 64b/66b de-encoding on the data.

Step 905: Perform Layer 2 MAC layer processing and PHY layer processing on the decoded 10G Ethernet service data, and finally send the local Ethernet switching network.

10 is a processing method for an EOS device to send a 10/100/1000 M Ethernet service to an SDH network according to an embodiment of the present invention, which is referred to as a forward processing of a 10/100/1000 M Ethernet service, and includes the following steps:

Step 1001: Receive a data signal of a 10/100/1000 M Ethernet service through an Ethernet interface, perform PHY layer processing, and perform MAC layer processing;

Step 1002: After performing one encapsulation on the Ethernet data in GFP/HDLC/LAPS, mapping to the corresponding VC container such as VC12, VC3, or VC4 (can choose whether to have the virtual concatenation I automatic link capacity adjustment LCAS function) ; Step 1003: The data stream after mapping is sent to the cross-connection processing unit through the backplane interface. Step 1004, after receiving the data, the cross-connection processing unit performs circuit switching according to the configuration, and then sends the data to the SDH group processing unit.

Step 1005: After receiving the data sent by the cross-connect processing unit, the SDH group processing unit performs multiplex section and regenerator section overhead processing, and then sends the data to the corresponding STM-N interface, and sends the data to the SDH network.

11 is a processing method for receiving an 10/100/1000 M Ethernet service data from an SDH network according to an embodiment of the present invention, which is called reverse processing of a 10/100/1000 M Ethernet service, and includes the following steps:

Step 1101: The SDH group processing unit performs a regenerator section and a multiplex section overhead processing on the data received from the SDH network through the STM-N interface.

Step 1102: The SDH group processing unit sends data to the cross-connect processing unit through the backplane interface, and performs circuit switching according to the configuration in the cross unit.

Step 1103: The Ethernet service processing unit receives the data sent by the cross-connection processing unit through the backplane interface.

Step 1104: The Ethernet service processing unit demaps the data by using a VC mapping/demapping module, and then decapsulates the data.

In step 1105, the de-encapsulated Ethernet service data is subjected to Layer 2 MAC layer processing and PHY layer processing, and finally sent to the local Ethernet switching network.

Industrial Applicability Compared with the prior art, the method of the present invention replaces the GFP/HDLC/LAPS package with 64b/66b encoding/decoding for 10G Ethernet services, and provides a 10G Ethernet service to SDH. The network method makes the EOS device more flexible, and the 10G Ethernet access is more efficient and the delay is smaller. The problem of inefficiency and increased delay caused by GFP/HDLC/LAPS encapsulation is avoided. Ben Invented device and method, in addition to being able to handle 10G Ethernet services, can still handle 10/100/1000M Ethernet service and have Layer 2 switching function when the functional unit of GFP/HDLC/LAPS package is set up At the same time, it can also realize the interworking of 10G Ethernet services and 10/100/1000M Ethernet services.

Claims

Claim

1. An Ethernet device based on a synchronous digital series, comprising an Ethernet service processing unit, a synchronous digital series group processing unit, and a cross-connect processing unit; wherein:

The Ethernet service processing unit is configured to perform processing of the received 10G Ethernet service data by the physical layer processing and the medium access control layer, and perform coding and virtual container mapping and outputting the processed data;

2. The apparatus according to claim 1, wherein the Ethernet service processing unit comprises: an Ethernet interface, an encoding module, and a first virtual container mapping module; and the synchronous digital series group processing unit comprises: Segment overhead processing module, regenerative section overhead processing module, STM-64 interface;

The encoding module is configured to encode and output 10G Ethernet service data output by the Ethernet interface;

The first virtual container mapping module is configured to map the encoded 10G Ethernet service data to a cascaded virtual container and output the same;

3. The apparatus according to claim 2, wherein the encoding module performs 64b/66b encoding on the 10G Ethernet service data; the cascaded virtual container is a VC-4-64C virtual container.

The device of claim 3, wherein the Ethernet service processing unit is further configured to receive 10/100/1000 M Ethernet service data; the Ethernet service processing unit further includes: a package module, a second virtual Container mapping module, first backplane interface; synchronous digital series group processing list The element also includes a second backplane interface, an STM-N interface;

The encapsulating module is configured to perform GFP/HDLC/LAPS encapsulation output on the 10/100/1000 M Ethernet service data processed by the physical layer processing and the medium access control layer;

The device according to claim 3, wherein the first virtual container mapping module maps 10G Ethernet service data to the VC-4-64C virtual container by using byte interleaving or non-interleaving mode. After the output.

The device of claim 2, wherein the Ethernet service processing unit further comprises a Layer 2 switching module, configured to perform Layer 2 switching processing on the Ethernet service data processed by the medium access control layer. .

7. The apparatus according to claim 3, wherein the cross-connect processing unit transmits data output by the Ethernet service processing unit to the VC-4-64C virtual container by performing overall circuit switching to The synchronous digital series group processing unit.

8. An Ethernet device based on a synchronous digital series, comprising an Ethernet service processing unit, a synchronous digital series group processing unit, and a cross-connect processing unit; wherein:

The synchronous digital series group processing unit is configured to receive data after the 10G Ethernet service is mapped into the SDH network from the synchronous digital series network, and perform the regeneration segment overhead processing and the multiplexing segment overhead processing on the data, and output the data;

The Ethernet service processing unit is configured to perform demapping and de-encoding the data received by the cross-connection processing unit from the synchronous digital series group processing unit, and then perform media access control layer processing and physical layer processing and output. Switch to the Ethernet network.

9. The apparatus according to claim 8, wherein the Ethernet service processing list The element includes: an Ethernet interface, a decoding module, and a first virtual container demapping module; the synchronous digital series group processing unit includes: a multiplexing segment overhead processing module, a regeneration segment overhead processing module,

STM-64 interface; where:

The apparatus according to claim 9, wherein the de-encoding module performs 64b/66b de-encoding on the data output by the first virtual container demapping module; the first virtual container demapping module pairs the 10G ether The data after the network service is mapped into the SDH network is used for VC-4-64C virtual container demapping.

The apparatus according to claim 10, wherein the synchronous digital series group processing unit is further configured to receive data after the 10/100/1000 M Ethernet service is mapped into the SDH network; the Ethernet service processing unit further The method includes: a second virtual container demapping module, a decapsulation module, and a first backplane interface; the synchronous digital series group processing unit further includes a second backplane interface, an STM-N interface;

The first backplane interface is configured to receive data from the second backplane interface by using the cross connection processing unit, and send the first virtual container demapping module or the second virtual container demapping module according to the configuration; The second virtual container demapping module is configured to demap the received data and output the data; the decapsulation module is configured to perform data output by the second virtual container demapping module

The GFP/HDLC/LAPS is decapsulated and output to the Ethernet interface for the medium access control layer processing and physical layer processing, and then output to the Ethernet switching network.

12. The apparatus according to claim 10, wherein, if the received 10G Ethernet service data adopts a byte interleave mapping manner, the first virtual container demapping module uses byte interleaving Demap.

The device according to claim 11, wherein the Ethernet service processing unit further includes a Layer 2 switching module, configured to perform Layer 2 of the Ethernet service data output by the decapsulation module or the decoding module. Exchange processing.

14. The apparatus according to claim 10, wherein the cross-connect processing unit outputs data output by the synchronous digital series group processing unit by performing overall circuit switching on the VC-4-64C virtual container. Send to the first virtual container demapping module.

15. An Ethernet service processing method for an Ethernet device based on a synchronous digital series, characterized in that the method comprises the following steps:

A: Perform physical layer processing and media access control layer processing on the received 10G Ethernet service data;

The method according to claim 15, wherein in step B, the 10G Ethernet service data is 64b/66b encoded and mapped into the VC-4-64C virtual container.

17. The method of claim 16, wherein the 10G Ethernet service data is mapped into the VC-4-64C virtual container using byte interleaving or non-interleaving.

18. The method according to claim 17, wherein in step C, the circuit switching is a VC-64C virtual container overall circuit switching.

19. An Ethernet service processing method based on an Ethernet device of a synchronous digital series, characterized in that the method comprises the following steps:

The method according to claim 19, wherein in step c), the VC-4-64C virtual container demapping and the 64b/66b de-encoding are performed on the 10G Ethernet service data.

The method according to claim 20, wherein, in step c), if the received 10G Ethernet service data adopts a byte interleave mapping manner, the byte interleaving manner is used for demapping.

22. The method according to claim 19, wherein, in step b), if the Ethernet service data is 10G Ethernet service data, the circuit is switched to the VC-4-64C virtual container as a whole circuit.