WO2012000374A1

WO2012000374A1 - Method and system for collectively processing interface services

Info

Publication number: WO2012000374A1
Application number: PCT/CN2011/075389
Authority: WO
Inventors: 阮德金
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-30
Filing date: 2011-06-07
Publication date: 2012-01-05
Also published as: CN101883117A; CN101883117B

Abstract

The present invention discloses a method and system for collectively processing interface services. Wherein, the method for collectively processing interface services includes: multiple main interface boards receive service data based on different transmission protocols (S202); the multiple main interface boards encapsulate the received service data according to same format (S204); the multiple main interface boards send the encapsulated service data to the same main service collective processing board to process (S206). Each interface board encapsulates the service data using the same format in the present invention, which solves the problems that the complexity and the costs of configuration and updating are high in the prior art, thus realizing flexible configuration and lower costs.

Description

The present invention relates to the field of communications, and in particular to a method and system for centralized processing of interface services. BACKGROUND OF THE INVENTION With the development of the Internet (Internet Protocol), the traditional circuit transmission technology has been difficult to meet the needs of business development. The current PTN (Packet Transmission Network) has become an industry-recognized next-generation IP. The city's 7-load technology. However, considering the interests of operators and the actual situation of their existing networks, PTN must be used with existing communication networks for a long time and will exist for a long time, such as SDH (Synchronous Digital Hierarchy) and PDH (Plesiochronous). Digital Hierarchy, quasi-synchronous digital system and other services coexist. Therefore, in the communication system, it is very important to convert the interface services encapsulated in SDH or PDH into packets suitable for PTN transmission. Due to the variety of interface services, the transmission bearer protocols of various services are inconsistent. Due to the simple and flexible transmission of internal services of communication devices, the centralized processing of interface services is often used within communication devices, that is, through interface boards with different functions. The services of the interface with different transport bearer protocols are converted into the same services as the transport bearer protocol, and then aggregated to the service processing board. The processing board then processes the services in a centralized manner. FIG. 1 is a schematic diagram of an existing interface service processing technology. The device consists of a physical interface board and a transport protocol processing board. The physical interface board implements the service access function, and the transport protocol processing board implements the transport protocol processing function. When the transport bearer protocol is changed, the new service processing function can be obtained by redeveloping the software of the transport protocol processing board. However, according to the above existing device architecture, there are the following problems:

1) Since the physical interface board corresponds to the transport protocol processing board, it is impossible to centrally process the services sent by different interface boards at the same time. In addition, when the service type of the physical interface board changes, the software of the transport protocol processing board needs to be updated, thereby increasing the complexity of the update configuration and increasing the update cost.

1 2) The transport protocol processing board has no control management function for the physical interface board. When one of the physical interface boards fails or is not in the position, the transport protocol processing board cannot determine the fault, which may result in the failure to process the service normally.

3) There is no service protection function between the physical interface boards, and the reliability is low. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and system for centralized processing of interface services, so as to at least solve the problem of complexity and high cost of configuration update in the prior art. According to an aspect of the present invention, a method for centralized processing of an interface service is provided, including: receiving, by a plurality of main interface boards, service data based on different transmission protocols; and receiving, by the plurality of main interface boards, the receiving according to the same format. The service data is encapsulated; the plurality of main interface boards send the encapsulated service data to the same primary service centralized processing board for processing. When the plurality of main interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: the primary service centralized processing board synchronizes the encapsulated data to the standby service centralized processing board; When the primary service centralized processing board fails, the above-mentioned standby service centralized processing board is started to process the encapsulated data. When the plurality of primary interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: when the primary service centralized processing board detects one or more of the multiple primary interface boards When the primary interface board fails, the primary service centralized processing board switches to the standby interface board corresponding to the one or more primary interface boards that have failed. When the primary service centralized processing board is switched to the standby interface board corresponding to the faulty one or more primary interface boards, the method further includes: the primary service centralized processing board is configured to the one or more primary interfaces that are faulty. The board performs resetting; when the main service centralized processing board detects that the one or more main interface boards that have failed above are normally operated after being reset, the main service centralized processing board is switched back to one or more of the above normal operations. The main interface board communicates. After the plurality of main interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: the primary service centralized processing board transmitting the processed data to the foregoing corresponding to the processed data. The main interface board; the corresponding main interface board decapsulates the processed data; and the corresponding main interface board sends the decapsulated processed data according to a corresponding transmission protocol.

2 According to another aspect of the present invention, an interface service centralized processing system is provided, including: a plurality of main interface boards and a main service centralized processing board, wherein the plurality of main interface boards are configured to receive different transmission protocols. The service data is encapsulated in the same format, and the encapsulated service data is sent to the main service centralized processing board for processing. The system further includes: a centralized service processing board, wherein the primary service centralized processing board is configured to synchronize the encapsulated data to the standby service centralized processing board; and the standby service centralized processing board is configured to be the primary service centralized processing board. When the fault occurs, the encapsulated data is processed, and the processed data is sent to the corresponding main interface board. The system further includes: a standby interface board, wherein the primary service centralized processing board is configured to detect one or more primary faults when one or more of the plurality of primary interface boards fail The standby interface board corresponding to the interface board communicates. The primary service centralized processing board includes: a reset unit configured to: when the primary service centralized processing board switches to a standby interface board corresponding to the one or more primary interface boards that have failed, to perform one of the failures or The plurality of main interface boards are reset; the switching unit is configured to switch the main service centralized processing board to one of the normal operations or the normal operation after detecting that the one or more main interface boards that have failed are normally operated after being reset Multiple main interface boards communicate. The main interface board includes: a receiving unit configured to receive processed data from the main service centralized processing board; a decapsulation unit configured to decapsulate the processed data; and a sending unit configured to decapsulate The above processed data is transmitted in accordance with the corresponding transmission protocol. In the present invention, each interface board encapsulates the same format for the service data, so that the service centralized processing board can only be responsible for subsequent processing of the service data according to the same format, regardless of the type of transmission protocol that the service data belongs to. In the above processing mode, when the service type changes, only the interface board needs to be replaced, and the processing board does not need to be adjusted, so that flexible configuration can be realized and the cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a schematic diagram of an existing interface service process according to the related art;

3 2 is a flowchart of a centralized processing method for an interface service according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a centralized processing system for an interface service according to an embodiment of the present invention; FIG. 4 is a service centralized processing board according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a service centralized processing board and a service interface board according to an embodiment of the present invention; FIG. 7 is a block diagram of a service centralized processing board and a service interface board according to an embodiment of the present invention; A service processing block diagram of the receiving side between the service centralized processing board and the service interface board in the embodiment; FIG. 8 is a block diagram of the service processing on the transmitting side between the service centralized processing board and the service interface board according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 2 is a flowchart of a method for centralized processing of an interface service according to an embodiment of the present invention, which includes:

S202, the plurality of main interface boards receive service data based on different transmission protocols; S204, the plurality of main interface boards encapsulate the received service data according to the same format;

S206. The multiple primary interface boards send the encapsulated service data to the same primary service centralized processing board for processing. In the prior art, since the physical interface board corresponds to the transmission protocol processing board, it is impossible to perform centralized processing on the services sent by different interface boards at the same time. In addition, when the service type of the physical interface board changes, the software of the transport protocol processing board needs to be updated, thereby updating the configuration complexity and increasing the update cost. In the embodiment of the present invention, each interface board encapsulates the same format for the service data, so that the service centralized processing board can only be responsible for subsequent processing of the service data according to the same format, regardless of the type of transmission protocol that the service data belongs to. . In the above processing mode, when the service type changes, only the interface board needs to be replaced, and the processing board does not need to be adjusted, so that flexible configuration can be realized and the cost can be reduced. Preferably, when the plurality of main interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: the primary service centralized processing board synchronizes the encapsulated data to the backup service centralized processing. When the main service centralized processing board fails, the above-mentioned standby service centralized processing board is started to process the encapsulated data. In the above manner, the backup of the processed data can be performed, thereby further improving the reliability of the system. Preferably, when the plurality of primary interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: when the primary service centralized processing board detects one of the multiple primary interface boards When the main interface board fails, the main service centralized processing board switches to the standby interface board corresponding to the one or more main interface boards that have failed. In the above manner, the backup of the processed data can be performed, thereby further improving the reliability of the system. Preferably, when the primary service centralized processing board is switched to the standby interface board corresponding to the one or more primary interface boards that have failed, the method further includes: one or more of the foregoing primary service centralized processing boards failing The main interface board is reset; when the main service centralized processing board detects that the one or more main interface boards that have failed above are normally operated after being reset, the main service centralized processing board is switched back to one of the above normal operations. Or multiple main interface boards for communication. In the above manner, communication between the main service centralized processing board and the main interface board can be restored, thereby further improving the reliability of the system. Preferably, after the plurality of main interface boards send the encapsulated service data to the same primary service centralized processing board for processing, the method further includes: sending, by the primary service centralized processing board, the processed data to the processed data. Corresponding to the main interface board; the corresponding main interface board decapsulates the processed data; and the corresponding main interface board sends the decapsulated processed data according to a corresponding transmission protocol. Through the above transmission mode, data transmission from the main service centralized processing board to the main interface board can be realized. The present invention also provides an interface service centralized processing system, which can use the above various preferred interface service centralized processing methods.

5 3 is a schematic diagram of an interface service centralized processing system according to an embodiment of the present invention, which includes: a plurality of main interface boards 302 and a main service centralized processing board 304, and a plurality of main interface boards 302 are respectively connected to the main service centralized processing board 304. The plurality of main interface boards 302 are configured to receive service data based on different transport protocols, encapsulate the received service data according to the same format, and send the encapsulated service data to the main service centralized processing board. deal with. In the embodiment of the present invention, each interface board encapsulates the same format for the service data, so that the service centralized processing board can only be responsible for subsequent processing of the service data according to the same format, regardless of the transmission protocol of the service data. Types of. In the above processing mode, when the service type changes, only the interface board needs to be replaced, and the processing board does not need to be adjusted, so that flexible configuration and cost reduction can be realized. Preferably, the system further includes: a service centralized processing board 306, which is connected to the main service centralized processing board 304, wherein the main service centralized processing board 304 is configured to synchronize the encapsulated data to the standby service centralized processing board 306; The service centralized processing board 306 is configured to process the encapsulated data when the primary service centralized processing board 304 fails, and send the processed data to the corresponding primary interface board 302. In the above manner, the backup of the processed data can be performed, thereby further improving the reliability of the system. Preferably, the system further includes: a standby interface board 308, which is connected to the main interface board 302 and the main service centralized processing board 304, wherein the main service centralized processing board 304 is configured to detect the plurality of main interface boards 302. When one or more primary interface boards fail, the standby interface board 308 corresponding to one or more of the failed primary interface boards communicates. In the above manner, the backup of the processed data can be performed, thereby further improving the reliability of the system. Preferably, the primary service centralized processing board 304 includes: a reset unit, connected to the main interface board 302, and configured to switch to the standby corresponding to the one or more main interface boards 302 that have failed in the primary service centralized processing board 304. When the interface board 308 performs communication, resetting the one or more main interface boards 302 that have failed; and the switching unit is configured to, after detecting that the one or more main interface boards 302 that have failed are normally operated after being reset, The primary service centralized processing board 304 is switched to communicate with one or more of the normal operating interface boards 302.

6 In the above manner, communication between the main service centralized processing board and the main interface board can be restored, thereby further improving the reliability of the system. Preferably, the main interface board 302 includes: a receiving unit, connected to the main service centralized processing board 304, configured to receive processed data from the main service centralized processing board 304; and a decapsulation unit configured to be processed after the processing The data is decapsulated; and the sending unit is configured to send the decapsulated processed data according to a corresponding transmission protocol. Through the above transmission mode, data transmission from the main service centralized processing board to the main interface board can be realized. The above embodiments will be further described below with reference to the accompanying drawings. In order to improve the deficiencies in the above background art, the present invention provides a centralized processing of services sent by different interface boards at the same time; it can meet the market requirements for service interface boards; and has control and management functions for interface boards. An interface service centralized processing device with higher reliability and flexibility and an implementation method thereof. The interface service centralized processing device of the embodiment of the present invention is composed of a service centralized processing board and a service interface board. In the system, the two services can be configured in a 1:N configuration, and the service centralized processing board can simultaneously process services with different encapsulation formats accessed by each service interface board. The role of the service interface board is to access various services from the external network. After processing, it is encapsulated into a certain packet format and then sent to the service centralized processing board through the backplane for processing; or received from the service centralized processing board through the backplane. The service is then processed according to a certain transport protocol and sent to the external network. The service centralized processing board is connected to the service interface board through the backplane. The function is to process the services sent by multiple service interface boards to the switching network, or send the processed services to the interface board through the backplane. And then sent to the external network through the interface board. In addition, in the business process, the service centralized processing board also has functions such as management control of the service interface board and 1: N service protection. The service centralized processing board is mainly composed of a part processing unit, a switching access unit, and a management control unit. The message processing unit is mainly a network processor, and the peripheral can also hang some chips to assist the network processor to better complete the business processing function. 4. The processing unit mainly completes the functions of stream classification and entry rate limitation of the service sent by the service interface board, and outputs an index of the header modification information, and uses the custom The private 4 scorpion communicates with the switching access unit. In addition, the unit can also implement Layer 2 switching, learning, searching and interface conversion. The switching access unit can be implemented by a dedicated ASIC (Application Specific Integrated Circuit) chip or an FPGA (Field Programmable Gate Array), which functions to implement switching access or switching network adaptation. And traffic management capabilities. The management control unit can be completed by using an FPGA, and its function is to complete the control and management of the service interface board, and provide control signals such as active/standby indication and reset for the service interface board. The implementation manner of the centralized processing of the interface service in the embodiment of the present invention is as follows: The sending side: the switching access unit of the service centralized processing board receives the cell data from the switching network, first sorts and reorganizes the cells, completes the recovery of the 4 frames, and then The reorganized 4艮 text is sent to the 4艮文 processing unit, and the MAC (Media Access Control) address learning, 4 艮爹 ,, scheduling, and other functions are completed, and finally sent to the service interface board through the backplane After processing, the service is sent to the external network. Receiving side: First, the service interface board processes the service received from the external network and sends it to the packet processing unit of the service centralized processing board through the backplane, which completes the classification of the flow, and the entry rate limit, L2 (Lever 2, II) Layer) Switching, MPLS (Multi Protocol Label Switching) switching, QoS (Quality of Service) processing, information modification, traffic adjustment and other functions. Then, it is sent to the switching access unit of the latter stage, which completes the functions of input header parsing, queue control, packet slicing and load sharing, scheduling, and spatial multicast, and finally is sent to the switching network. In order to improve system reliability, the service centralized processing board in the present invention is backed up according to 1 + 1 , that is, the system inserts two boards at the same time, one piece is in the main state, and the other part is in the standby state. The active/standby status of the service central processing board is negotiated and determined through the interconnection between the boards. The decision result is sent to the service interface board through hardwired. In addition, in order to improve system reliability, the service interface board also has 1: N protection. That is, when the control management unit of the service centralized processing board finds that the service interface board of the main working state is faulty, the service of the board is switched to the service interface board in the protection state, and the fault interface board is also Reset, if the interface board is running normally after reset, the processing board will replace the service from the protection interface board. Preferred embodiments of the present invention will be described in detail below.

8 4 is a block diagram of a service central processing board according to an embodiment of the present invention, which includes: a sequential processing unit 402, a switching access unit 404, and a management control unit 406. In an embodiment of the invention, the functionality of the processing unit 402 is implemented by the network processor XII. The core frequency of the chip is 240M; the line rate processing of 20G bidirectional full-duplex minimum packet length service is supported, and the maximum access traffic is 40G; 24 SGMII (Serial Gigabit Media Independent Interface) is supported. The service interface board sends the processed service to the service centralized processing board through the interface. The service interface of the two SPI4.2 (System Packet Interface 4.2) is used to connect the switching access unit. . The function of the switching access unit 404 is implemented by the ASIC chip FAP21V. The chip has two SPI4.2 interfaces for connecting to the network processor XII; there are 24 pairs of 3.125G serial interfaces for connection to the switching network. The functionality of the management control unit 406 is implemented by an FPGA (eg, model number EP2C35). FIG. 5 is a schematic diagram of active/standby negotiation of a service centralized processing board according to an embodiment of the present invention. There are two pairs of signal connections between the active and standby services of the active and standby services in the 1+1 protection configuration. The two boards are prepared with the board and the active/standby status signals. The two pairs of signals are determined according to the following rules: When the device is powered on, which board is initialized first, which board is used for the main board, the board sends the board ready signal and the board active/standby status signal to the other board, leaving the other board in standby. Status, and the main status information is sent to each interface board. When one of the boards fails, the other board detects that the board of the faulty board is ready for signal abnormality, and the board is replaced from the standby state for the main use, and the new status information is notified to each interface board. . Preferably, the primary standby state of the board is forcibly set. FIG. 6 is a block diagram showing the connection between a service centralized processing board and a service interface board according to an embodiment of the present invention. In this embodiment, a total of 24 service interface boards can be configured, and an El (European Digital Transmission Format, 2.048 Mbps European Data Transmission Format) service interface board or an ATM (Asynchronous Transfer Mode) service interface board is also available. After receiving the services of different encapsulation formats from the external network, each service interface board performs service processing on the local board and finally sends it to the service centralized processing board through the SGMII interface. There are 5 sets of signal connections between each service interface board and the service centralized processing board, which are the TD+/- and RD+/- signals for the transmission service and the 1:N switching signal for the control management (the signal and the service centralized processing board) The reset signal (RESET) of the service interface board is multiplexed, the service interface board in-position signal, and the active and standby processing board indication signals. After the power-on is initialized, each service interface board sends a board-in-place signal to the service centralized processing board, indicating that the service board is ready for service processing. At the same time, the service centralized processing board sends a master to each service interface board. The standby board indicates the signal, which informs each service interface board which processing board is in the active state, and can process the service. If each business

9 When the service board of the interface board is configured with N:N protection, and the service interface board of a working state is faulty, the service central processing board sends a 1:N switching signal to the service interface board in the protected state to make the service. The interface board is in working state, which will not cause service interruption and send a reset signal to the faulty service interface board. FIG. 7 is a block diagram of a service process on a receiving side between a service centralized processing board and a service interface board according to an embodiment of the present invention. As shown in FIG. 7, first, the SGMII signal from the service interface board is sent to the network processor XII of the service centralized processing board through the backplane, which completes the classification of the flow, the entry rate limitation, the L2 exchange, the MPLS exchange, the QOS processing, and the exit. Side related information tampering, flow adjustment and other functions. After the above steps are completed, the switch access chip FAP21V is sent to the subsequent stage through the SPI4.2 interface, which completes the input header parsing and queue control; completes the packet slicing and load sharing; completes the scheduling and spatial multicast initiated by the output side. The function is finally sent to the switching network via 24 pairs of 3.125G backplane buses. FIG. 8 is a block diagram showing the service processing on the transmitting side between the service centralized processing board and the service interface board according to the embodiment of the present invention. As shown in FIG. 8, first, the switching access chip FAP21V of the service centralized processing board receives the cell data from the switching network through the 3.125G backplane bus, and then sorts and reassembles the cells to complete the recovery of the packet. The reassembled packet is sent to the network processor XII through the SPI-4.2 interface, and functions such as MAC address learning, message modification, scheduling, etc. are completed, and finally sent to the service interface board through the SGMII bus, and the service bearer protocol is processed on the service interface board. Send to external network. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred 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. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Claims

The method for centralized processing of an interface service includes: receiving, by a plurality of main interface boards, service data based on different transmission protocols;

The plurality of main interface boards encapsulate the received service data in the same format;

The plurality of main interface boards send the encapsulated service data to the same primary service central processing board for processing. The method according to claim 1, wherein, when the plurality of main interface boards send the encapsulated service data to the same main service centralized processing board for processing, the method further includes:

The main service centralized processing board synchronizes the encapsulated data to a standby service centralized processing board;

When the primary service centralized processing board fails, the standby service centralized processing board is started to process the encapsulated data. The method according to claim 1, wherein, when the plurality of main interface boards send the encapsulated service data to the same main service centralized processing board for processing, the method further includes:

When the primary service centralized processing board detects that one or more of the plurality of primary interface boards fails, the primary service centralized processing board switches to one or more primary faults The standby interface board corresponding to the interface board communicates. The method according to claim 3, wherein when the primary service centralized processing board is switched to communicate with the standby interface board corresponding to the one or more primary interface boards that have failed, the method further includes:

The primary service centralized processing board resets one or more primary interface boards that have failed;

After the main service centralized processing board detects that the faulty one or more main interface boards are normally operated after being reset, the main service centralized processing board is switched back to one or more of the normal operations. The main interface board communicates.

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The method according to any one of claims 1 to 4, wherein after the plurality of main interface boards send the encapsulated service data to the same main service centralized processing board for processing, the method further includes:

The main service centralized processing board sends the processed data to the main interface board corresponding to the processed data;

And the corresponding main interface board decapsulates the processed data; the corresponding main interface board sends the decapsulated processed data according to a corresponding transmission protocol.

6. A centralized processing system for an interface service, comprising: a plurality of main interface boards and a main service central processing board, wherein

The plurality of main interface boards are configured to receive service data based on different transport protocols, encapsulate the received service data according to the same format, and send the encapsulated service data to the main service centralized processing board. deal with.

The system according to claim 6, further comprising: a service centralized processing board, wherein the primary service centralized processing board is configured to synchronize the encapsulated data to a processing board of the standby service set;

The standby service centralized processing board is configured to process the encapsulated data when the primary service centralized processing board fails, and send the processed data to the corresponding main interface board.

The system according to claim 6, further comprising: a standby interface board, wherein

The primary service centralized processing board is configured to perform, when detecting that one or more of the plurality of primary interface boards fails, and the standby interface board corresponding to the one or more primary interface boards that are faulty. Communication.

9. The system according to claim 6, wherein the primary service centralized processing board comprises:

a reset unit, configured to: when the primary service centralized processing board switches to communicate with a standby interface board corresponding to the failed one or more primary interface boards, to the failed one or more primary interface boards Perform a reset;

12 a switching unit, configured to switch the primary service centralized processing board to one or more primary interface boards that are in normal operation when detecting that the one or more primary interface boards that have failed are normally operated after being reset Communicate.

The system according to any one of claims 6 to 9, wherein the main interface board comprises: a receiving unit configured to receive processed data from the main service centralized processing board; and a decapsulation unit, The method is configured to decapsulate the processed data; and the sending unit is configured to send the decapsulated processed data according to a corresponding transmission protocol.

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