WO2004068788A1 - Procede et systeme de reception et de transmission de differentes trames de donnees sur un reseau de transmission numerique - Google Patents

Procede et systeme de reception et de transmission de differentes trames de donnees sur un reseau de transmission numerique Download PDF

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Publication number
WO2004068788A1
WO2004068788A1 PCT/CN2003/000674 CN0300674W WO2004068788A1 WO 2004068788 A1 WO2004068788 A1 WO 2004068788A1 CN 0300674 W CN0300674 W CN 0300674W WO 2004068788 A1 WO2004068788 A1 WO 2004068788A1
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WIPO (PCT)
Prior art keywords
data
interface
virtual
data frame
processing
Prior art date
Application number
PCT/CN2003/000674
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English (en)
French (fr)
Inventor
Zhiqun He
Yuxiang Wang
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Huawei Technologies Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd filed Critical Huawei Technologies Co., Ltd
Priority to AT03815514T priority Critical patent/ATE529973T1/de
Priority to AU2003255116A priority patent/AU2003255116A1/en
Priority to ES03815514T priority patent/ES2373440T3/es
Priority to EP03815514A priority patent/EP1589697B1/en
Publication of WO2004068788A1 publication Critical patent/WO2004068788A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2869Operational details of access network equipments
    • H04L12/2898Subscriber equipments
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4604LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462LAN interconnection over a bridge based backbone
    • H04L12/4625Single bridge functionality, e.g. connection of two networks over a single bridge
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08Protocols for interworking; Protocol conversion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the present invention relates to a system and method for accessing and transmitting data frames, and in particular, to a system and method for accessing and transmitting different data frames on a digital transmission network.
  • Ethernet technology has many advantages such as ease of use, cheap price, and good scalability
  • Ethernet technology has evolved from a mainstream local area network technology to the main data service access technology, and is being used by more and more telecommunications operators.
  • MAN In the construction of MAN.
  • Ethernet data services include two types: Ethernet data leased line services and virtual local area network services.
  • FIG. 1 depicts a block diagram of a prior art data mapping demapping apparatus related to the present invention.
  • the device includes: one or more user network interfaces 20, and the user network interfaces are standard Ethernet interfaces.
  • One or more inter-network interfaces 30, the inter-network interfaces are synchronous digital transmission channels.
  • Each mapping demapping device corresponds to a unique user network interface and a unique inter-network interface.
  • the data frames entering the device from the user network interface 20 and the data frames output to the outside of the device meet the Ethernet data standard.
  • the data frames entering the device from the inter-network interface 30 and the data frames output to the outside of the device satisfy the synchronous digital transmission network standard.
  • the mapping and demapping device 10 performs mapping operations on the Ethernet data frames entering the device from the user network interface 20 into synchronized digital data frames, and outputs the mapped data frames to the outside of the device through the network interface 30; 10 Perform the demapping operation on the synchronous digital data frames entering the device from the inter-network interface into Ethernet data frames, and output the de-mapped data frames to the outside of the device through the user network interface.
  • the function of this device is relatively simple, and it can only provide Ethernet data line services.
  • FIG. 2A depicts a block diagram of a device of a prior art two-bridge solution related to the present invention.
  • the device includes: one or more user network interfaces 20, the user network interfaces 20 are standard Ethernet interfaces, and one user network interface corresponds to a unique bridge port.
  • the device further includes: one or more inter-network interfaces 30, and the inter-network interfaces 30 are synchronous digital transmission channels.
  • the device also includes: a bridge device 400, which has been described in detail in IEEE 802.1D and IEEE 802.1Q, and will not be described here. Among them, the bridge device 400 includes multiple bridge ports, and one bridge port corresponds to a unique user network interface or a unique mapping and demapping device.
  • Each mapping and demapping device corresponds to a unique bridge port and a unique inter-network interface.
  • the data frames entering the device from the user network interface 20 and the data frames output to the outside of the device meet the Ethernet data standard.
  • the data frames entering the device from the inter-network interface 30 and the data frames output to the outside of the device meet the synchronous digital transmission network standard.
  • the data frame entered from the user network interface 20 enters the bridge device 400 through the bridge port corresponding to the user network interface.
  • the bridge device 400 calculates the bridge output port according to the address information in the data frame, and passes the bridge The output port outputs it to the corresponding mapping and demapping device 102 (the mapping and demapping device performs a mapping operation on the data frame and outputs it to the network interface); and vice versa.
  • a user network interface can only correspond to one service (Ethernet data leased line service) Or virtual local area network service), which results in a lower access capability of the device. It is likely that the processing capability of the device is still more than sufficient, but because the user network interface has been used up, the operator has to purchase a new device in order to improve the access capability.
  • An interface between networks can only correspond to one service (Ethernet data leased line service or virtual local area network service), which results in a low device aggregation capability.
  • Ethernet data leased line service or virtual local area network service In a star topology network, it is possible that the processing capability of the device is still more than enough, but because the network interface has been used up, operators have to purchase new devices in order to improve the convergence capability. For operators, not only must new investments be added, but also waste of bandwidth is increased.
  • Figure 3 depicts a block diagram of a prior art three RPR scheme device related to the present invention.
  • the device includes: one or more user network interfaces, and the user network interfaces are standard Ethernet interfaces. The interface between two networks. The interface between the networks is a synchronous digital transmission channel.
  • Data processing device 5QQ can be a data aggregation de-aggregation device or a bridge device.
  • Step 1 The data processing device 500 processes the data frame (if the data processing device is a data aggregation and de-aggregation device, perform aggregation processing on the data frame; If it is a bridge device, exchange data frames);
  • Step 2 The data processing device 500 passes the processed data frame to the RPR device 600;
  • Step 3 The RPR device 600 sends the data frame to the data frame according to the address information in the data frame.
  • Corresponding mapping demapping device Corresponding mapping demapping device
  • Step 4 The mapping and demapping device performs a mapping operation on the data frame, and sends the data frame to the outside of the device through a corresponding network interface.
  • Step 1 The mapping and demapping device performs a demapping operation on the data frame, and passes the demapped data frame to the RPR device 600;
  • Step 2 The RPR device 6QQ processes the data frame and sends it to the data processing device;
  • Step 3 The data processing device 500 processes the data frames (if the data processing device is a data aggregation and de-aggregation device, the data frame is de-aggregated; if it is a bridge device, the data frame is exchanged);
  • Step 4 The data processing device 500 finds a corresponding user network interface according to the address information in the data frame, and sends the data frame to the outside of the device through the user network interface.
  • Ethernet dedicated line service is not supported; if the data processing device is a data aggregation and de-aggregation device, the virtual local area network service is not supported.
  • An object of the present invention is to provide a virtual private line device on a synchronous digital transmission network and a method for accessing and transmitting Ethernet data frames to improve the convergence capability of the device.
  • a different data frame access and A transmission system for accessing and transmitting different data frames to each other includes: at least one user network interface for cooperating with a user's network vehicle; and / or at least one inter-network interface for communicating with all Said digital transmission network is coupled to transmit data; and
  • a data conversion device coupled to the user network interface and the inter-network interface, for converting a data format between the user network interfaces or a data format of the inter-network interface Data format conversion between user network interfaces; wherein the data conversion device includes a virtual private line device, an interface device, and a processing device, and the virtual private line device interfaces the data of the user network interface with the inter-network through the interface device.
  • the virtual dedicated line device includes: an inter-device interface coupled to the processing device for inputting and outputting data frames; a virtual dedicated line processing unit coupled to the inter-device interface to aggregate or de-aggregate the processed data frames, A control message is detected; a rule database is coupled to the virtual dedicated line processing unit, and the rule database stores rules corresponding to various types of the data frames and is coupled to the virtual interface processing unit to process data according to the rules; A control interface unit, coupled to the rule database and the virtual special A processing unit for controlling the virtual line processing unit and said rule database.
  • the rules database stores convergence rules and de-aggregation rules.
  • the rules database stores relay rules.
  • the correspondence between the data classification and the rule is 1: 1
  • the rules in the rule database include: inputting a data frame classification number, a rule type, which is one of aggregation / de-aggregation / relay, a label number, Output data frame classification number.
  • the virtual dedicated line processing unit stores logic for controlling a message format and processing a data frame; a rule format in a rule database.
  • the control interface unit provides a control interface to the outside of the device, and through the control interface, the working status of the virtual interface processing unit can be monitored, and rules in the rule database can be added, deleted, modified, and retrieved.
  • the interface device and processing device are a virtual interface device and a data processing scheduling device, and the inter-device interface is connected to the data processing scheduling device or the virtual interface device.
  • the present invention provides a method for a virtual private line device to access and transmit data frames on a digital transmission network, which is characterized by including the following steps:
  • a data frame enters the virtual dedicated line device from an inter-device interface
  • control message If it is a control message, it sends a data frame to the external control system through the control interface unit, and the processing ends; if it is a non-control message: extract the input data classification number information; use the input data classification number information as an index to retrieve the rule database;
  • Modify the data frame send the data frame through the inter-device interface, and the process ends.
  • the step of processing data according to a rule type includes the steps of: judging a rule type,
  • the step of modifying the data frame includes the step of replacing the data classification number information of the starting position of the data frame with the output data frame classification number defined in the rule.
  • the virtual private line device stores multiple aggregation rules, multiple de-aggregation rules, and multiple relay rules (relay rules are optional. In some simple virtual private line devices, relay rules may not be required).
  • the correspondence between data classification and rules is 1: 1.
  • Rules in a virtual private line device can be dynamically created and deleted. The virtual private line device realizes the isolation, transmission and sharing of data frames of multiple different users on the same physical channel by adding labels to data frames before sending, replacing labels during transmission, and removing labels at the destination of the data frames. .
  • a virtual LAN service and an Ethernet data leased line service can be simultaneously supported on one device interface (user network interface or inter-network interface), and multiple devices can be accessed and aggregated on one device interface
  • the Ethernet data frame of each user greatly improves the device's access and aggregation capabilities.
  • FIG. 1 depicts a block diagram of a prior art data mapping demapping scheme
  • Figure 2A depicts a block diagram of a prior art two bridge solution
  • 2B depicts a block diagram of a second enhanced bridge solution in the prior art
  • 3 depicts a block diagram of a prior art three RPR scheme
  • Figure 4 depicts a schematic block diagram of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention
  • FIG. 4 (F) depicts a flowchart of processing data of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention
  • 4A depicts a functional block diagram of a virtual interface device of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention
  • FIG. 4A (F1) depicts a flowchart of a virtual interface device processing device interface data of a preferred embodiment of a system for synchronously transmitting and receiving Ethernet data frames on a digital transmission network of the present invention
  • FIG. 4A depicts a flowchart of a virtual interface device processing a data entry interface between devices in a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention
  • FIG. 5 depicts a functional block diagram of a virtual private line device of a preferred embodiment of a system for synchronously transmitting digital data over an Ethernet data frame on the Internet;
  • FIG. 5 (F) depicts a flowchart of a virtual private line device processing the data entered by the interface between the devices in the preferred embodiment of the synchronous digital transmission network Ethernet data frame access and transmission system of the present invention
  • Fig. 6 depicts a schematic block diagram of a virtual bridge device of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the invention
  • Fig. 6 (F1) depicts Ethernet data on a synchronous digital transmission network of the invention
  • Figure ⁇ depicts a functional block diagram of a data processing and scheduling device of a preferred embodiment of a system for synchronously transmitting and receiving Ethernet data frames on a digital transmission network of the present invention
  • FIG. 7 (F) depicts a flowchart of a data processing scheduling device processing data entering a device of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention.
  • any device has the following three functions:
  • Input function Receive information from the outside of the device through the user network interface and the inter-network interface.
  • standard Ethernet interface used in the present invention has the meaning as follows Down:
  • the definition of the local area network interface is described in detail in IEEE 802.3.
  • the local area network interface following the definition of IEEE 802.3 is referred to as a standard Ethernet interface.
  • FIG. 4 illustrates a system for accessing and transmitting different data frames on a digital transmission network, for accessing and transmitting different data frames to each other.
  • a system for accessing and transmitting different data frames on a digital transmission network includes: a plurality of user network interfaces for coupling with a user's network; a plurality of inter-network interfaces for coupling with the digital transmission network to transmit data; a plurality of Mapping and demapping device 10; virtual interface device 80, coupled to the user network interface and coupled to the inter-network interface through mapping and demapping device 10; data processing and scheduling device 90, coupled to virtual interface device 80; multiple virtual private line devices 120 and one
  • the virtual bridge device 100 and a PRP device 110 are coupled to a data processing scheduling device.
  • a plurality of mapping and demapping devices 10, a virtual interface device 80, and a data processing scheduling device 90 constitute a data conversion device of the present invention.
  • the system inputs for different data frame access and transmission on the digital transmission network are: (1) a data frame entering the device from the user network interface; (2) a data frame entering the device from the network interface.
  • the outputs of different data frame access and transmission systems on the digital transmission network are: (1) Data frames output from the user network interface to the outside of the device. (2) Data frames output from the inter-network interface to the outside of the device.
  • FIG. 5 depicts a principle block diagram of a virtual private line device of a preferred embodiment of a system for synchronously transmitting digital data on the Internet over an Ethernet data frame on the Internet.
  • a system for accessing and transmitting different data frames on a digital transmission network includes: a plurality of user network interfaces for coupling with a user's network; a plurality of inter-network interfaces for coupling with the digital transmission network to transmit data; a plurality of Mapping and demapping device 10; virtual interface device 80, coupled to the user network interface and coupled to the inter-network interface through mapping and demapping device 10; data processing and scheduling device 90, coupled to virtual interface device 80; multiple virtual private line devices 120 and one
  • the virtual bridge device 1 QQ and a PRP device 110 are coupled to a data processing scheduling device.
  • the virtual private line processing unit 8001 is coupled to the inter-device interface to process data of the inter-device interface.
  • the virtual private line processing unit 8001 is also coupled to a rule database and a control interface unit.
  • the control interface unit performs data interaction with the outside world through the control interface.
  • the invention improves the convergence capability of the device through the virtual dedicated line device.
  • the virtual private line device stores multiple aggregation rules, multiple de-aggregation rules, and multiple relay rules (relay rules are optional, and in some stand-alone virtual private line devices, relay rules may not be required).
  • the correspondence between data classification and rules is 1: 1.
  • Rules in a virtual private line device can be dynamically created and deleted.
  • the virtual private line device realizes the isolation, transmission and sharing of data frames of multiple different users on the same physical channel by adding labels to data frames before sending, replacing labels during transmission, and removing labels at the destination of the data frames.
  • a virtual private line device contains a virtual private line processing unit and a rule database.
  • the virtual dedicated line processing unit has two main functions:
  • the virtual dedicated line processing unit is the processing center of the device. The following three parts are solidified in the virtual dedicated line processing unit:
  • the rules database is responsible for controlling the processing behavior of the virtual private line processing unit, is the control center, and the rules in the rules database can be dynamically updated.
  • the rules database can store multiple rules, and each rule contains four parts of information: input data frame classification number, rule type (convergence / unconvergence / relay), label number, and output data frame classification number.
  • the virtual private line device is connected to the data processing and scheduling device through the interface between the devices; the virtual private line device is connected to the control system of the device through the control interface.
  • FIG. 5 (F) is a flowchart of virtual private line processing. For data frames entering the device from the interface between devices, the processing steps of the virtual private line processing unit are as follows:
  • Step 1 Determine whether the data frame is a control message. If it is a non-control message, skip to step 3 for execution.
  • Step 2 Through the control interface unit, the data frame is transmitted to the control system of the Xibu Department, and skip to step 12 for execution;
  • Step 3 Extract the input data classification number information at the starting position of the data frame;
  • Step 4 Use the input data classification number information as a key to search the rule database;
  • Step 5 judge the retrieval result, if the retrieval result is empty, then discard the data frame, and skip to step 1 2 for execution;
  • Step 6 Determine the rule type. If it is a convergence rule, go to step 7 for execution; if it is a de-aggregation rule, go to step 8 for execution; if it is a relay rule, go to step 9 for execution;
  • Step 7 Modify the data frame, insert the tag number defined in the rule at a specific position in the data frame, and skip to step 10 for execution;
  • Step 8 Modify the data frame, remove the tag number information at a specific position in the data frame, and skip to step 10 for execution;
  • Step 9 Modify the data frame, and replace the tag number at the specific position in the data frame with the tag number defined in the rule;
  • Step 10 Modify the data frame, and replace the data classification number information of the starting position of the data frame with the output data frame classification number defined in the rule;
  • Step 11 Send the data frame to the data frame processing and scheduling device through the inter-device interface;
  • Step 12 The processing ends.
  • FIG. 4 (F1) the processing steps of the system for accessing and transmitting different data frames on the digital transmission network to the data frames entering the device from the user network interface are described.
  • step 1 the virtual interface device matches the data frame according to the classification rule; in step 2, the virtual interface device modifies the data frame according to the classification rule, and inserts the number of the data classification in the data frame;
  • step 3 the virtual interface device passes the modified data frame to the data processing scheduling device
  • step 4 the data processing scheduling device finds a corresponding processing device according to the number of the data classification in the data frame;
  • step 5 the data processing scheduling device passes the data frame to the corresponding processing device, and if the processing flow is a virtual private line device to process the data frame, it passes the data frame to the virtual private line device; if the corresponding processing device is a virtual interface device, the system Go to step 8; In step 6, the corresponding device processes the data frame. At the end of the processing, the data classification number is modified and the modified data frame is passed to the data processing scheduling device; At step 7, the system jumps to step 4;
  • step 8 the virtual interface device finds the corresponding device interface according to the number of the data classification in the data frame
  • step 9 the virtual interface device modifies the data frame information, and deletes the number of the data classification from the data frame;
  • step 10 the virtual interface device sends the modified data frame through the device interface (if the device interface corresponds to an inter-network interface, the mapping operation must be performed by a mapping demapping device before outputting).
  • the processing steps of different data frame access and transmission systems on the digital transmission network for the data frames entering the device from the network interface are as follows:
  • step 1 the mapping and demapping device performs a demapping operation on the data frame.
  • step 2 the remaining processing steps are the same as the processing steps of the data frame entering the device from the user network interface.
  • FIG. 4A is a principle block diagram of a virtual interface device of a preferred embodiment of a system for accessing and transmitting Ethernet data frames on a synchronous digital transmission network of the present invention.
  • the system uses the virtual interface device 80 to improve the device's access capability.
  • a The device interface (user network interface 20 or inter-network interface 30) is expanded into multiple virtual interfaces, and each virtual interface corresponds to a different user and a different service, respectively.
  • Data frames entering the device from the device interface are classified by the virtual interface processing unit 800 in the virtual interface device according to different services required by different users, and the corresponding processing flow is selected according to the classification.
  • Different processing flows correspond to different rules stored in the rule database 850.
  • the control interface unit controls the virtual interface processing unit 800 to perform classification according to an instruction input by the control interface, and searches for corresponding rule processing data stored in the rule database 850.
  • the data frame output from the device is processed by the virtual interface device according to the classification of the data frame to find the corresponding device interface output. Since N rules are stored in the virtual interface device, the correspondence between the device interface and the rules is 1: N.
  • the rules in the virtual interface device can be dynamically created and deleted. Therefore, the rules can be easily modified so that the device has good adaptability and can be changed according to user requirements and system upgrades.
  • the device also includes a software loading device (not shown) to load different software.
  • the virtual interface processing unit 800 is responsible for processing data frames and is a processing center.
  • the processing steps and processing logic in the virtual interface processing unit are solidified and cannot be changed during the operation of the device.
  • the rules database is the control center. In the process of processing the data frame by the virtual interface processing unit, the rules database is responsible for providing relevant processing and control parameters. Different parameters will cause different processing behaviors.
  • the rules in the rules database can be updated during the operation of the device.
  • the control interface unit provides a control interface to the outside of the device. Through the control interface, the control system of the device can monitor the working status of the virtual interface processing unit, and can add, delete, modify and retrieve rules in the rule database. Multiple rules can be stored in the rules database, each rule contains five parts Information: device interface number, data frame classification number, data frame address offset, data frame classification characteristic value, data frame comparison mask.
  • the virtual interface device is connected to the user network interface or the network interface through the device interface, and the correspondence between the user network interface or the network interface and the device interface is 1: 1.
  • the virtual interface device is connected to the data processing and scheduling device through an inter-device interface.
  • the virtual interface device is connected to the control system of the device through a control interface.
  • FIG. 4A F1
  • the processing steps of the virtual interface processing unit for the data frame that enters the virtual interface device from the device interface are described:
  • Step 1 Using the number corresponding to the device interface entered by the data frame as an index, the rule database is searched according to the device interface number keyword to retrieve the first rule corresponding to the device interface;
  • Step 2 Determine the retrieval result. If the retrieval result is empty, discard the data frame and skip to step 10 for execution.
  • Step 3 According to the data frame address offset in the rule, read the information at the corresponding address offset of the data frame;
  • Step 4 Compare the read information with the data frame in the rule to perform bitwise calculation.
  • Step 5 Compare the calculation result of step 4 with the classification feature value of the data frame in the rule. If they are equal, go to step 8 for execution;
  • Step 6 Search the rules database to retrieve the next rule corresponding to the device interface
  • Step 7 Go to step 2 for execution;
  • Step 8 Modify the data frame, and insert the data classification number information in the rule at the starting position of the data frame;
  • Step 9 Send the data frame to the data frame processing and scheduling device through the inter-device interface; Step 1 Q: Processing ends.
  • FIG. 4A (F2) the processing steps of the virtual interface processing unit for the data frame entering the virtual interface device from the inter-device interface are described.
  • the processing steps of the virtual interface processing unit are as follows:
  • Step 1 Extract the data classification number information at the starting position of the data frame;
  • Step 2 Use the classification number information as an index to search the rule database by data frame classification number keywords;
  • Step 3 Determine the retrieval result. If the retrieval result is empty, discard the data frame and skip to step 6 for execution.
  • Step 4 Modify the data frame to remove the data classification number information of the starting position of the data frame;
  • Step 5 Send the data frame to the corresponding device interface according to the device interface number in the rule;
  • FIG. 7 depicts a principle block diagram of a data processing and scheduling device for a system for accessing and transmitting an Ethernet data frame on a synchronous digital transmission network according to the present invention.
  • the data processing scheduling device is coupled to a plurality of inter-device interfaces to process data of the inter-device interfaces.
  • the data processing scheduling device is also coupled to a processing flow database and a control interface unit.
  • the control interface unit performs data interaction with the outside world through the control interface.
  • the invention realizes personalized service through the data processing and scheduling device, and improves the serviceability of the equipment.
  • a plurality of processing flows are stored in the data processing scheduling device.
  • the correspondence between processing flow and data frame classification is 1: 1.
  • the data scheduling processing device finds a corresponding processing flow according to the classification of the data frame, and according to the processing flow, notifies the corresponding other device to process the data frame.
  • the processing flow in the data frame processing and scheduling device can be dynamically created, modified, and deleted. During the operation of the device, the operator can adapt to local conditions and dynamically add, modify, and delete the processing flow in the data processing scheduling device to quickly and conveniently provide personalized services to users and maximize the effectiveness of the device.
  • the processing steps in which the data processing scheduling unit is the processing center of the device are solidified.
  • the data processing scheduling unit has multiple inter-device interfaces, and each inter-device interface corresponds to a unique external device. The correspondence between the interfaces between devices and external devices is also solidified.
  • the process flow database is the control center of the device, and the content of the database can be dynamically updated.
  • Each process in the process database contains the following information:
  • the data processing and scheduling device is connected to other devices through an interface between the devices, and the interface between each device corresponds to a virtual bridge device or a virtual dedicated line device or an RPR device or a virtual interface device.
  • the data processing and scheduling device is connected to the control system of the equipment through a control interface.
  • Figure 6 depicts Ethernet data frame access and transmission on a synchronous digital transmission network of the present invention.
  • the invention solves the user Ethernet data frame address space limitation problem through a virtual network bridge device. Multiple virtual bridges can be provided on one virtual bridge device.
  • a virtual bridge has all the functions and features of a bridge device. But unlike the bridge device, the virtual bridge can be dynamically created and deleted. During the operation of the device, the operator user can dynamically create or delete multiple virtual bridges. Because each virtual bridge has an independent address space, the operator can use different virtual bridges for conflicting address spaces. Users provide virtual local area network services.
  • the virtual bridge further expands the functions of the bridge to support VMAN domain-based switching operations.
  • the virtual bridge device includes a virtual bridge processing unit 802, a multicast database 856, a control interface unit, a forwarding database 852, and a virtual bridge database 854.
  • the virtual bridge processing unit has three main functions:
  • control messages Format (c) Exchange and process data frames of non-control messages, modify data classification information in the data frames; the virtual bridge processing unit is the processing center of the device, and it solidifies the following five parts: (a) control messages Format
  • the virtual bridge database, multicast database, and forwarding database are responsible for controlling the processing behavior of the virtual bridge processing unit. During the operation of the device, the content in the database can be updated. Entries in the multicast database and forwarding database have exactly the same data format. Each entry contains the following information:
  • control system external to the device can achieve the following functions:
  • the virtual bridge device is connected to the data processing and scheduling device through an interface between the devices.
  • the virtual network bridge device is connected to the control system of the device through a control interface.
  • Fig. 6 (F1) depicts a flow chart of the virtual bridge device processing the incoming data of the interface between the devices in the preferred embodiment of the system for synchronously transmitting and receiving Ethernet data frames on the digital transmission network of the present invention.
  • the virtual bridge processing unit processes the data frames that enter the device from the inter-device interface.
  • step 1 determine whether the data frame is a control message, and if it is a non-control message, skip to step 3 for execution;
  • step 2 transmitting the data frame to the external control system through the control interface unit, and skip to step 17 for execution;
  • step 3 at a fixed position of the data frame, extract the input data classification number information, destination address, source address, VLAN number, and VMAN number (optional);
  • Step 4 Use the extracted data classification number information as a key to search the virtual bridge database
  • step 5 judge the retrieval result, if the retrieval result is empty, discard the data frame, skip to step 17 for execution;
  • step 6 extract the virtual bridge number and port number information from the retrieval result;
  • step 7 learn the source address, and update the forwarding database according to the learning result.
  • step 8 determine whether the destination address is a multicast address. If it is a multicast address, first execute the multicast sub-process, and then skip to step 1. 7 executive;
  • Step 9 Determine whether the target address is a broadcast address. If it is a broadcast address, first execute the broadcast sub-flow, and then skip to step 17 to execute.
  • step 10 using the virtual bridge number, input port, destination address, VLAN number, and VMAN number (optional) as keywords to search the forwarding database;
  • step 11 judging the retrieval result, if the retrieval result is empty, first execute the broadcast sub-flow, and then skip to step 17 to execute;
  • step 12 extract the information of the output port number from the retrieval result
  • Step 13 Search the virtual bridge database using the virtual bridge number and the output port number as keywords
  • step 14 determine the retrieval result, if the retrieval result is empty, discard the data frame, and skip to step 17 for execution;
  • FIG. 7 (F) depicts a flowchart of a data processing scheduling device processing data entering a device in a preferred embodiment of a system for synchronously transmitting digital data on a network over an Ethernet network according to the present invention.
  • the processing steps of the data processing scheduling unit for the data frames entering the device are as follows Down:
  • Step 1 Extract the classification number information in the data frame
  • Step 2 Use the extracted classification number as an index to search the processing flow database.
  • Step 3 Determine the search result. If the search result is empty, discard the data frame and skip to step 6 for execution.
  • Step 4 Extract the interface number information between the devices from the search results
  • Step 5 Send the data frame to the outside of the device through the interface between the devices corresponding to the interface number between the devices;
  • Step 6 Processing ends.
  • Operators can use the system in Figure 4 to provide users with Ethernet services, corresponding to a combination of several processing processes. Operators can flexibly define and select the required combination of processing flows based on the network topology, user service requirements, and bandwidth resources. Frequently used combinations of processing flows are as follows:
  • the virtual interface device classifies the data frame
  • the virtual interface device outputs a data frame to a corresponding device interface.
  • the virtual interface device classifies the data frames
  • the virtual interface device classifies the data frames
  • the virtual private line device processes the data frame (relay, aggregation or de-aggregation processing);
  • the virtual interface device outputs a data frame to a corresponding device interface.
  • the virtual interface device classifies the data frame
  • the RPR device processes the data frame (data frame transmission termination, data frame transmission relay, data frame transmission start);
  • the virtual interface device outputs a data frame to a corresponding device interface.
  • the device manufacturer can fully or partially adopt the system and method. For some simpler devices, some devices may not be needed. In a device with a relatively simple function, the processing flow is also very simple. The device manufacturer can even fix the processing relationship by fixing the connection relationship between the devices to achieve the purpose of omitting the data scheduling processing device. For example, for a device that only provides Ethernet data dedicated line services, the device may include only the following devices:
  • users can be provided with a complete virtual local area network service.
  • restrictions on the address space of Ethernet data frames on a user network interface are eliminated.
  • a device of a network accesses Ethernet data frames of multiple users, there is no restriction on the address space of the user Ethernet data frames.
  • a virtual local area network service and an Ethernet data leased line service can be simultaneously supported on one device interface (user network interface or inter-network interface), and multiple users can be accessed and aggregated on one device interface
  • the Ethernet data frame greatly improves the device's access and aggregation capabilities.
  • an operator can maximize the processing capability of the device and the bandwidth resources according to the specific conditions such as network topology, user service requirements, and bandwidth resources. Utilization.
  • personalized services can be provided to users conveniently and quickly. Operators can create new process combinations to provide users with new services without the need to upgrade and purchase devices.
  • the data entering the device from the device interface is classified first and then processed. Different data classifications correspond to different processing flows; this is achieved by the virtual interface device.
  • the data frame coming from one device interface may include multiple types, and the processing flow of different types of data frames may be completely different.
  • the correspondence between the processing flow and the device interface is m: n .
  • the present invention enables the processing processes to be arbitrarily combined; the combination of the data processing scheduling device and the processing processes used by it is an important part of the present invention.
  • the operator user can dynamically update the processing flow of the device, and the operator user can select the combination of flows provided by the device, or can create and write a new combination of flows by himself according to the situation.
  • the 22 processing flow combinations are organic combinations.
  • the number of bridge devices is fixed, and the address space conflict of user data frames can only be avoided by limiting the address space of user data frames.
  • the virtual bridge device of the present invention can dynamically add virtual bridges. The address space of each virtual bridge is independent, and different virtual bridges correspond to different users. Data frame address space There are no restrictions.
  • the data frames of multiple different users can be isolated, transmitted, and shared on the same physical channel.
  • the virtual private line device of the present invention is implemented.

Description

数字传送网上不同的数据帧接入和传送的系统和方法 技术领域
本发明涉及数据帧接入和传送的系统和方法,具体涉及数字传送 网上不同的数据帧接入和传送的系统和方法。
背景技术
由于以太网技术具有易于使用、价格便宜、扩展性良好等诸多优 点, 以太网技术已经从一种主流的局域网技术, 演进到主要的数据业 务接入技术, 被越来越多的电信运营商应用于城域网的建设中。提供 以太网数据服务, 已经成为电信运营商的一种潮流和趋势。 以太网数 据服务包括两种类型: 以太网数据专线服务和虚拟局域网服务。
为了描述的方便, 下文使用的短语的意义如下: MPLS -多协议标 记交换技术; GFP -通用定帧技术; VLAN -虛拟局域网; VMAN -虚拟 城域网; RPR -弹性分组环。
当前电信运营商最主要的数据传输网络是同步数字传送网 (SDH/S0NET)。因此如何在同步数字传送网(SDH/S0NET)上有效的接入 和传送以太网数据帧, 满足日益增长的以太网数据服务的需求, 是很 多电信运营商和电信装置制造商所重点关注的。 目前已经有多个电信 装置制造商提供了在同步数字传送网(SDH/S0NET)上接入和传送以太 网数据帧的装置,就装置功能的具体实现方案而言,主要有以下三种: (1)数据映射解映射方案。 (2)网桥方案。
(3) RPR方案。
图 1 描绘与本发明相关的现有技术一数据映射解映射方案的装 置的框图。 装置包括: 一个或多个用户网絡接口 20, 用户网络接口 为标准的以太网接口。 一个或多个网络间接口 30 , 网络间接口为同 步数字传送通道。 一个或多个映射解映射装置 101、 102. . .。 每个映 射解映射装置对应着一个唯一的用户网络接口和一个唯一的网络间 接口。 其中, 从用户网络接口 20处进入装置的数据帧和输出到装置 外部的数据帧满足以太网数据标准。 从网络间接口 30处进入装置的 数据帧和输出到装置外部的数据帧满足同步数字传送网标准。
其中,映射解映射装置 10将从用户网络接口 20处进入装置的以 太数据帧进行映射操作成为同步数字数据帧 ,并将映射后的数据帧通 过网络间接口 30输出到装置外部;映射解映射装置 10将从网络间接 口处进入装置的同步数字数据帧进行解映射操作为以太数据帧,并将 解映射后的数据帧通过用户网络接口输出到装置外部。该装置功能比 较简单, 只能够提供以太网数据专线服务。
图 2A描绘与本发明相关的现有技术二网桥方案的装置的框图。 装置包括: 一个或多个用户网络接口 20, 用户网络接口 20为标准的 以太网接口, 一个用户网络接口对应一个唯一的网桥端口。 装置还 包括: 一个或多个网络间接口 30 , 网络间接口 30之间为同步数字传 送通道。 装置还包括:一个网桥装置 400, IEEE802. 1D和 IEEE802. 1Q 中已经对网桥装置做了详尽的描述, 这里不再描述。 其中, 网桥装置 400中包含多个网桥端口, 一个网桥端口对应一个唯一的用户网络接 口或一个唯一的映射解映射装置。每一个映射解映射装置对应一个唯 一的网桥端口和一个唯一的网络间接口。 其中, 从用户网络接口 20 处进入装置的数据帧和输出到装置外部的数据帧满足以太网数据标 准。 从网络间接口 30处进入装置的数据帧和输出到装置外部的数据 帧满足同步数字传送网标准。
从用户网络接口 20处进入装皇的数据帧通过与用户网络接口相 对应的网桥端口进入网桥装置 400, 网桥装置 400根据数据帧中的地 址信息计算出网桥输出端口,通过网桥输出端口将其输出到相应的映 射解映射装置 102 (映射解映射装置对数据帧进行映射操作后输出到 网络间接口); 反之亦然。
在网桥方案中, 一般允许运营商通过配置,把部分或全部用户网 络接口直接和映射解映射装置进行一一对应。在这种情况下, 装置中 同时采用了上述两种技术方案, 我们称之为增强型网桥方案。 增强型 网桥装置的功能模型如图 2B所示:
现有技术二的缺点
(1)不能提供完整的虚拟局域网服务。 如果在同一网络的装置上 通过用户网络接口同时接入了多个用户,如果这些用户的以太网数据 帧的地址空间有冲突, 则装置不能进行有效的隔离, 无法为用户提供 正确的服务。
(2)非增强型网桥无法提供以太网数据专线服务。
(3)一个用户网络接口只能对应一种服务(以太网数据专线服务 或虚拟局域网服务), 从而导致了装置的接入能力比较低。 很有可能 会出现装置的处理能力仍然綽綽有余,但是因为用户网络接口已经使 用完毕了, 导致运营商为了提高接入能力而不得不购买新的装置。
(4)一个网络间接口只能对应一种服务(以太网数据专线服务或 虚拟局域网服务), 从而导致了装置汇聚能力低下。 在星型拓朴状的 网络中, 4艮有可能会出现装置的处理能力仍然綽綽有余, 但是因为网 络间接口已经使用完毕了,导致运营商为了提高汇聚能力而不得不购 买新的装置。 对运营商而言, 不仅要增加新的投资, 而且也增加了对 带宽的浪费。
图 3描绘与本发明相关的现有技术三 RPR方案的装置的框图。装 置包括: 一个或多个用户网络接口, 用户网络接口为标准的以太网接 口。 两个网络间接口, 网络间接口为同步数字传送通道。 一个 RPR装 置 600。 IEEE802. 17中已经对 RPR装置^ ί故了详尽的描述。 两个映射 解映射装置。 一个数据处理装置 500。 数据处理装置 5QQ可是数据汇 聚解汇聚装置或网桥装置。
其中, 对从用户网络接口 20处进入的数据帧的处理步骤如下: 步骤 1、 数据处理装置 500对数据帧进行处理(如果数据处理装 置为数据汇聚解汇聚装置, 则对数据帧进行汇聚处理; 如果为网桥装 置, 则对数据帧进行交换);
步骤 2、 数据处理装置 500把经过处理后的数据帧传递给 RPR装 置 600;
步驟 3、 RPR装置 600根据数据帧中的地址信息把数据帧发送给 相应的映射解映射装置;
步骤 4、 映射解映射装置对数据帧进行映射操作, 通过相对应的 网络间接口发送到装置外部。
对从网络间接口处进入的数据帧的处理步骤如下:
步驟 1、 映射解映射装置对数据帧进行解映射操作, 将解映射后 的数据帧传递给 RPR装置 600;
步骤 2、 RPR装置 6QQ对数据帧进行处理后, 发送给数据处理装 置;
步驟 3、 数据处理装置 500对数据帧进行处理(如果数据处理装 置为数据汇聚解汇聚装置, 则对数据帧进行解汇聚处理; 如果为网桥 装置, 则对数据帧进行交换);
步骤 4、 数据处理装置 500根据数据帧中的地址信息找到相对应 的用户网络接口, 通过用户网络接口把数据帧发送到装置外部。
该现有技术的不足为:
(1)不能够同时提供以太网专线服务和虚拟局域网服务。 如果数 据处理装置为网桥装置, 则不支持以太网专线服务; 如果数据处理装 置为数据汇聚解汇聚装置, 则不支持虚拟局域网服务。
(2)只能够使用在环状拓朴的网络中。
发明内容
本发明的一个目的是提供一种同步数字传送网上虚拟专线装置 及其接入和传送以太网数据帧的方法, 以提高设备的汇聚能力。
根据本发明的一个方面,一种数字传送网上不同的数据帧接入和 传送的系统, 用于将不同的数据帧接入和相互传送, 所述系统包括: 至少一个用户网络接口, 用于与用户的网络辆合; 和 /或至少一 个网络间接口, 用于与所述数字传送网耦合以传送数据; 和
数据转换装置,耦合到所述用户网络接口与所述网络间接口, 用 于转换所述用户网絡接口间的数据格式或转换所述网絡间接口的数 据格式或在所述网絡间接口和所述用户网络接口间转换数据格式; 其中,所述数据转换装置包括虚拟专线装置和接口装置和处理装 置,所述虚拟专线装置通过所述接口装置将所述用户网络接口的数据 与所述网络间接口的数据交互,所述虛拟专线装置包括:装置间接口, 耦合到所述处理装置, 用于输入与输出数据帧; 虚拟专线处理单元, 耦合到装置间接口, 以汇聚或解汇聚处理数据帧, 检测出控制报文; 规则数据库, 耦合到所述虚拟专线处理单元, 所述规则数据库存储有 各类所述数据帧对应的规则,耦合到所述虚拟接口处理单元以根据所 述规则处理数据; 控制接口单元, 耦合到所述规则数据库和所述虚拟 专线处理单元, 用于控制所述虚拟专线处理单元和所述规则数据库。
可选地, 所述规则数据库存储汇聚规则、 解汇聚规则。
优选地 , 所述规则数据库存储中继规则。
可选地, 数据分类与所述规则的对应关系为 1: 1 , 规则数据库中 的规则包括: 输入数据帧分类编号, 规则类型, 为汇聚 /解汇聚 /中继 中的一种, 标签编号, 输出数据帧分类编号。
优选地, 所述虚拟专线处理单元中, 存储有控制报文格式、 处理 数据帧的逻辑; 规则数据库中规则的格式。 可选地, 所述控制接口单元向装置外部提供控制接口, 通过所述 控制接口, 可以监测虚拟接口处理单元的工作状况, 可以对规则数据 库中的规则进行增加、 删除、 修改和检索操作。
优选地,所述接口装置和处理装置为虛拟接口装置和数据处理调 度装置,所述装置间接口与所述数据处理调度装置或所述虚拟接口装 置相连接。
本发明提供一种虚拟专线装置在数字传送网上接入和传送数据 帧的方法, 其特征在于包括以下步骤:
数据帧从装置间接口进入所述虚拟专线装置,
判断数据帧是否为控制报文,
如果为控制报文,通过控制接口单元发送数据帧到外部的控制系 统, 处理结束;如果为非控制报文:提取出输入数据分类编号信息; 以 输入数据分类编号信息为索引, 检索规则数据库;
判断是否检索到分类编号信息:
如果未检索到, 丢弃该数据帧, 处理结束;
如果检索到, 根据规则类型处理数据;
修改数据帧, 通过装置间接口发送数据帧, 处理结束。
可选地, 步骤根据规则类型处理数据的步骤包括步骤: 判断规则类型,
如果是汇聚规则,在数据帧中的特定位置插入规则中所定义的标 签编号;
如果是解汇聚规则, 在数据帧中的特定位置去除标签编号的信 如果是中继规则,把数据帧中的特定位置的标签编号更换为本规 则中所定义的标签编号。
优选地,步骤修改数据帧的步骤包括用规则中所定义的输出数据 帧分类编号替换数据帧起始位置的数据分类编号信息的步骤。 本发明的系统和方法有以下优点:
(1)虚拟专线装置中存放了多个汇聚规则、 多个解汇聚规则和多 个中继规则(中继规则为可选项, 在一些简单的虚拟专线装置中, 可 以不需要中继规则)。 数据分类与规则的对应关系为 1: 1。 虚拟专线 装置中的规则是可以动态创建和删除的。虚拟专线装置通过为数据帧 在发送前增加标签, 在传送中更换标签, 和在数据帧的目的地去除标 签的方式来实现多个不同用户的数据帧在同一物理通道上的隔离、传 送和共享。
(2)使用本发明的系统和方法,可以同时在一个设备接口(用户网 络接口或网络间接口)上支持虚拟局域网服务和以太网数据专线服 务, 可以同时在一个设备接口上接入和汇聚多个用户的以太网数据 帧, 极大的提高了装置的接入和汇聚能力。
附图说明
图 1描绘现有技术一数据映射解映射方案的框图;
图 2 A描绘现有技术二网桥方案的框图;
图 2B描绘现有技术二增强的网桥方案的框图; 图 3描绘现有技术三 RPR方案的框图;
图 4 描绘本发明的同步数字传送网上以太网数据帧接入和传送. 的系统的优选实施方案的原理框图;
图 4 ( F )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案处理数据的流程图;
图 4A描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实施方案的虚拟接口装置的原理框图;
图 4A ( F1 )描绘本发明的同步数字传送网上以太网数据帧接入 和传送的系统的优选实施方案的虚拟接口装置处理设备接口进入的 数据的流程图;
图 4A ( F2 )描绘本发明的同步数字传送网上以太网数据帧接入 和传送的系统的优选实施方案的虚拟接口装置处理装置间接口进入 的数据的流程图;
图 5 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实施方案的虚拟专线装置的原理框图;
' 图 5 ( F )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案的虛拟专线装置处理装置间接口进入的 数据的流程图;
图 6 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实施方案的虚拟网桥装置的原理框图; . 图 6 ( F1 )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案的虚拟网桥装置处理装置间接口进入的 数据的流程图;
图 Ί 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实施方案的数据处理调度装置的原理框图;
图 7 ( F )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案的数据处理调度装置处理进入装置的数 据的流程图。
具体实施方式
为了更好的阐述本发明的系统和方法,首先简单描述装置的基本 功能。 通常, 任何一个装置都具有以下三种功能:
(1)输入功能。 从装置外部接收信息。
(2)处理功能。 把从装置外部接收到的信息进行加工。
(3)输出功能。 把经过加工的信息输出到装置外部。
对在同步数字传送网(SDH/S0NET)上接入和传送以太网数据帧的 装置而言, (1)输入功能: 通过用户网络接口和网络间接口, 从装置 外部接收信息。
(2)输出功能: 通过用户网络接口和网络间接口, 把经过加工的 信息输出到装置外部。
(3)处理功能:对在同步数字传送网(SDH/S0NET)上接入和传送以 太网数据帧的装置而言, 采用不同的技术方案, 装置就具有不同的处 理功能; 釆用不同的技术方案, 装置就具有不同的服务能力和服务效 率。
另外, 本发明中使用的 "标准的以太网接口"这个词语其含义如 下:
IEEE802. 3中对局域网接口的定义做了详细的描述,在本发明中, 把遵循 IEEE802. 3定义的局域网接口称为标准的以太网接口。
现参照附图说明本发明的方案。 为了描绘的筒洁, 在描绘现有技 术中描绘过的部件和单元, 不再描绘。 在下面的所有描绘中, 对于前 面已描绘的部件和单元, 也不重复描绘。 图 4描述一种数字传送网上不同的数据帧接入和传送的系统,用 于将不同的数据帧接入和相互传送。数字传送网上不同的数据帧接入 和传送的系统包括: 多个用户网络接口, 用于与用户的网络耦合; 多 个网络间接口, 用于与所述数字传送网耦合以传送数据; 多个映射解 映射装置 10; 虚拟接口装置 80 , 耦合到用户网络接口且通过映射解 映射装置 10耦合到网络间接口; 数据处理调度装置 90 , 耦合到虚拟 接口装置 80; 多个虚拟专线装置 120和一个虚拟网桥装置 100和一 个 PRP装置 11 0 , 耦合到数据处理调度装置。 其中, 多个映射解映射 装置 10、 虚拟接口装置 80和数据处理调度装置 90构成本发明的数 据转换装置。其中数字传送网上不同的数据帧接入和传送的系统输入 为: (1)从用户网络接口处进入装置的数据帧; (2)从网络间接口处进 入装置的数据帧。数字传送网上不同的数据帧接入和传送的系统的输 出为: (1)从用户网络接口处输出到装置外部的数据帧。 (2)从网络间 接口处输出到装置外部的数据帧。 图 5 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实施方案的虚拟专线装置的原理框图。 数字传送网上 不同的数据帧接入和传送的系统包括: 多个用户网络接口, 用于与用 户的网络耦合; 多个网络间接口, 用于与所述数字传送网耦合以传送 数据; 多个映射解映射装置 10; 虚拟接口装置 80 , 耦合到用户网絡 接口且通过映射解映射装置 10耦合到网络间接口; 数据处理调度装 置 90 , 耦合到虚拟接口装置 80; 多个虚拟专线装置 120和一个虚拟 网桥装置 1 QQ和一个 PRP装置 11 0, 耦合到数据处理调度装置。 在虚 拟专线装置中, 虚拟专线处理单元 8001耦合到装置间接口, 以处理 装置间接口的数据。 虚 专线处理单元 8001还耦合到规则数据库和 控制接口单元。 控制接口单元通过控制接口与外界进行数据交互。
本发明通过虚拟专线装置来提高装置的汇聚能力。虚拟专线装置 中存放了多个汇聚规则、 多个解汇聚规则和多个中继规则(中继规则 为可选项, 在一些筒单的虚拟专线装置中, 可以不需要中继规则)。 数据分类与规则的对应关系为 1: 1。 虚拟专线装置中的规则是可以动 态创建和删除的。虚拟专线装置通过为数据帧在发送前增加标签, 在 传送中更换标签,和在数据帧的目的地去除标签的方式来实现多个不 同用户的数据帧在同一物理通道上的隔离、 传送和共享。 一个虚拟 专线装置中包含一个虚拟专线处理单元和一个规则数据库。
虚拟专线处理单元有两个主要功能:
( a )检测出控制报文, 并把控制报文通过控制接口单元交给装 置的控制系统处理; ( b )对非控制报文的数据帧进行汇聚或解汇聚或中继处理。 虛拟专线处理单元是装置的处理中心,虚拟专线处理单元中固化 了以下三部分的内容:
( a )控制报文的格式;
( b )对数据帧的处理步骤和逻辑;
( c )规则数据库中规则的格式; 规则数据库负责控制虚拟专线处理单元的处理行为, 是控制中 心, 规则数据库中的规则是可以动态更新的。规则数据库中可以存储 多个规则, 每一规则中包含四部分信息: 输入数据帧分类编号, 规则 类型 (汇聚 /解汇聚 /中继), 标签编号, 输出数据帧分类编号。
其中,虛拟专线装置通过装置间接口与数据处理调度装置进行连 接; 虚拟专线装置通过控制接口与设备的控制系统进行连接。
虚拟专线装置的实现有多种技术方案, 在不同的技术方案下, 虚 拟专线处理单元中对数据帧的处理步驟和逻辑是一致的。此时主要的 区别有:
( a )规则数据库中的规则的格式, 例如规则中标签的长度和标 签在数据帧中的位置都是不一样的;
( b )虚拟专线处理单元中的控制报文的格式。
从可扩充性和兼容性方面考虑,本发明建议使用 MPLS技术或 GFP 技术或 VMAN技术或嵌套 VLAN技术来实现虚拟专线装置。装置制造商 也可以采用自定义的标签格式(或自定义的数据帧封装)来实现虚拟 专线装置。装置中可以同时支持多个采用不同技术方案的虚拟专线装 置。 图 5 ( F )是虚拟专线处理的流程图, 对从装置间接口进入装置 的数据帧, 虚拟专线处理单元的处理步骤如下:
步骤 1 : 判断数据帧是否为控制报文, 如果为非控制报文, 则 跳转至步骤 3执行;
步骤 2: 通过控制接口单元, 将数据帧传送给夕卜部的控制系统, 跳转至步骤 1 2执行;
步骤 3: 在数据帧的起始位置, 提取出输入数据分类编号信息; 步骤 4: 以输入数据分类编号信息为关键字, 对规则数据库进行 检索;
步驟 5 : 判断检索结果, 如果检索结果为空, 则丢弃该数据帧, 跳转至步骤 1 2 执行;
步骤 6: 判断规则类型, 如果是汇聚规则, 跳转至步骤 7执行; 如果是解汇聚规则, 跳转至步骤 8执行; 如果是中继规则, 跳转至步 骤 9执行;
步驟 7 : 修改数据帧, 在数据帧中的特定位置插入规则中所定义 的标签编号, 跳转至步骤 10执行;
步骤 8: 修改数据帧, 在数据帧中的特定位置去除标签编号的信 息, 跳转至步骤 10执行; 步驟 9: 修改数据帧, 把数据帧中的特定位置的标签编号更换为 本规则中所定义的标签编号;
步骤 10: 修改数据帧, 用规则中所定义的输出数据帧分类编号 替换数据帧起始位置的数据分类编号信息;
步骤 11: 把数据帧通过装置间接口发送给数据帧处理调度装置; 步骤 12: 处理结束。 现参照附图 4 ( F1 )描绘数字传送网上不同的数据帧接入和传送 的系统对从用户网络接口处进入装置的数据帧的处理步驟。
首先,在步骤 1 ,虚拟接口装置根据分类规则对数据帧进行匹配; 在步骤 2 , 虚拟接口装置根据分类规则修改数据帧, 在数据帧中 插入数据分类的编号;
在步骤 3 , 虚拟接口装置将修改后的数据帧传递给数据处理调度 装置;
在步骤 4 , 数据处理调度装置根据数据帧中数据分类的编号找到 相应的处理装置;
在步骤 5 , 数据处理调度装置把数据帧传递给相应的处理装置, 如果处理流程是是虚拟专线装置对数据帧进行处理,则传递给虚拟专 线装置; 如果相应的处理装置为虚拟接口装置, 系统跳转到步驟 8; 在步骤 6, 相应的装置对数据帧进行处理, 在处理结束时, 会对 数据分类的编号进行修改,并把修改后的数据帧传递给数据处理调度 装置; 在步骤 7 , 系统跳转到步骤 4;
在步骤 8 , 虚拟接口装置根据数据帧中数据分类的编号找到相应 的设备接口;
在步骤 9 , 虚拟接口装置修改数据帧信息, 把数据分类的编号从 数据帧中删除;
在步骤 10, 虚拟接口装置把修改后的数据帧通过设备接口发送 出去(如果设备接口对应的是网络间接口, 输出前必须先通过映射解 映射装置进行映射操作)。 数字传送网上不同的数据帧接入和传送的系统对从网络间接口 处进入装置的数据帧的处理步骤如下:
在步骤 1 , 映射解映射装置对数据帧进行解映射操作; 在步驟 2 ,其余的处理步骤与从用户网络接口处进入装置的数据 帧的处理步骤相同。
在实现装置的具体功能的时候,装置制造商可以完全或部分采用 以上方法。 功能比较筒单的装置中, 处理流程也是非常简单的, 装置 制造商甚至可以通过固定各装置之间的连接关系,从而对处理流程进 行固化, 达到省略掉数据调度处理装置的目的。 图 4A是本发明的同步数字传送网上以太网数据帧接入和传送的 系统的优选实施方案的虚拟接口装置的原理框图。系统利用虚拟接口 装置 80 , 提高装置的接入能力。 通过虚拟接口装置 80 , 可以把一个 设备接口(用户网絡接口 20或网络间接口 30 )扩展成多个虚拟接口, 每个虚拟接口分别对应着不同用户和不同的服务。从设备接口(用户 网络接口 20和网络间接口 30 )进入装置的数据帧, 通过虚拟接口装 置中的虚拟接口处理单元 800根据不同用户要求的不同的服务进行 分类,根据分类选择对应的处理流程。 不同的处理流程对应规则数据 库 850中存储的不同规则。控制接口单元根据控制接口输入的指令控 制虚拟接口处理单元 800进行分类,并查找规则数据库 850中存储的 对应规则处理数据。从装置输出的数据帧, 通过虚拟接口装置根据数 据帧的分类处理后找到相应的设备接口输出。由于虚拟接口装置中存 放了 N个规则, 设备接口与规则的对应关系为 1: N。 虚拟接口装置中 的规则是可以动态创建和删除的, 因此, 可以容易地修改规则, 使装 置具有良好的适应性, 可以根据用户的要求和系统的升级改变。 该装 置中还包括软件的加载装置(未示出), 以加载不同的软件。
其中, 虚拟接口处理单元 800负责对数据帧进行处理,是处理中 心, 虚拟接口处理单元中的处理步骤和处理逻辑是固化的, 在装置运 行期间, 是不可以改变的。 规则数据库是控制中心, 在虚拟接口处 理单元对数据帧进行处理的过程中,规则数据库负 '责提供相关的处理 和控制参数, 不同的参数会导致不同的处理行为。 在装置运行期间, 规则数据库中的规则是可以更新的。控制接口单元向装置外部提供了 控制接口, 通过控制接口, 装置的控制系统可以监测虚拟接口处理单 元的工作状况, 可以对规则数据库中的规则进行增加、 删除、 修改和 检索操作。规则数据库中可以存储多个规则, 每一规则中包含五部分 信息: 设备接口编号, 数据帧分类编号, 数据帧地址偏移, 数据帧分 类特征值, 数据帧比较掩码。
其中,虚拟接口装置通过设备接口与用户网络接口或网络间接口 进行连接, 用户网络接口或网络间接口与设备接口的对应关系为 1: 1。虚拟接口装置通过装置间接口与数据处理调度装置进行连接。 虛 拟接口装置通过控制接口与设备的控制系统进行连接。
现参照图 4A ( F1 ), 描绘对从设备接口进入虚拟接口装置的数据 帧, 虚拟接口处理单元的处理步骤:
步骤 1 : 以数据帧进入的设备接口所对应的编号为索引, 对规则 数据库按设备接口编号关键字进行检索, 检索该设备接口所对应的 第一个规则;
步骤 2: 判断检索结果, 如果检索结果为空, 则丢弃该数据帧, 跳转至步骤 1 0 执行;
步骤 3: 根据规则中的数据帧地址偏移, 读取数据帧相应的地址 偏移处的信息;
步骤 4: 将读取出来的信息与规则中的数据帧比较掩码进行按位 与计算操作;
步骤 5: 将步驟 4的计算结果与规则中的数据帧分类特征值进行 比较, 如果相等, 跳转至步 骤 8执行;
步骤 6 : 对规则数据库进行检索, 检索该设备接口所对应的下一 个规则;
步骤 7: 跳转至步骤 2执行; 步骤 8 : 修改数据帧, 在数据帧的起始位置, 插入规则中的数据 分类编号信息;
步骤 9 : 把数据帧通过装置间接口发送给数据帧处理调度装置; 步骤 1 Q: 处理结束。 现参照图 4A ( F2 )描绘对从装置间接口进入虚拟接口装置的数 据帧,虚拟接口处理单元的处理步骤。 对从装置间接口进入虚拟接口 装置的数据帧, 虚拟接口处理单元的处理步骤如下:
步骤 1 : 在数据帧的起始位置, 提取出数据分类编号信息; 步骤 2: 以分类编号信息为索引, 对规则数据库按数据帧分类编 号关键字进行检索;
步骤 3: 判断检索结果, 如果检索结果为空, 则丟弃该数据帧, 跳转至步骤 6 执行;
步骤 4 :修改数据帧,去除数据帧起始位置的数据分类编号信息; 步骤 5 : 根据规则中的设备接口编号, 将数据帧发送到相应的设 备接口;
步骤 6 : 处理结束。 图 7 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的数据处理调度装置的原理框图。 在数据处理调度装置中, 数据处理调度装置耦合到多个装置间接口, 以处理装置间接口的数 据。 数据处理调度装置还耦合到处理流程数据库和控制接口单元。 控制接口单元通过控制接口与外界进行数据交互。
本发明通过数据处理调度装置来实现个性化的服务,提高设备的 可服务性。 数据处理调度装置中存放了多个处理流程。 处理流程与数 据帧分类的对应关系为 1: 1。 数据调度处理装置根据数据帧的分类找 到相应的处理流程, 并且根据处理流程, 通知相应的其他装置对数据 帧进行处理。数据帧处理调度装置中的处理流程是可以动态创建、修 改和删除的。 在装置运行期间, 运营商可以因地制宜, 通过动态的增 加、修改和删除数据处理调度装置中的处理流程, 来迅速便捷的为用 户提供个性化服务, 最大限度的发挥装置的功效。
数据处理调度单元是装置的处理中心的处理步骤是固化的。数据 处理调度单元有多个装置间接口,每一个装置间接口对应着一个唯一 的外部装置。 装置间接口与外部装置的对应关系也是固化的。
处理流程数据库是装置的控制中心,数据库的内容可以进行动态 更新。 处理流程数据库中的每一个处理流程包含以下信息:
( a )数据帧的分类编号
( b )装置间接口编号
数据处理调度装置通过装置间接口与其它装置进行连接,每一装 置间接口对应着一个虚拟网桥装置或虛拟专线装置或 R P R装置或 虚拟接口装置。数据处理调度装置通过控制接口与设备的控制系统进 行连接。 图 6 描绘本发明的同步数字传送网上以太网数据帧接入和传送 的系统的优选实 方案的虚拟网桥装置的原理框图。本发明通过虚拟 网桥装置来解决用户以太网数据帧地址空间限制问题。一个虚拟网桥 装置上可以提供多个虛拟网桥。虚拟网桥具有网桥装置的的所有功能 和特性。但与网桥装置不同的是,虚拟网桥是可以动态创建和删除的。 在装置运行期间, 运营商用户可以动态的创建或删除多个虚拟网桥, 因为每个虚拟网桥都具有独立的地址空间 ,所以运营商可以通过使用 不同的虚拟网桥为地址空间有冲突的用户提供虚拟局域网服务。
运营商可以象配置网桥一样配置虚拟网桥。虚拟网桥对网桥的功 能进行了进一步的扩展, 支持基于 VMAN域的交换操作。 虚拟网桥装 置中包含一个虚拟网桥处理单元 802、 一个组播数据库 856、 一个控 制接口单元、 一个转发数据库 852和一个虚拟网桥数据库 854。
虚拟网桥处理单元有三个主要功能:
( a )检测出控制报文, 并把控制报文通过控制接口单元交给装 置的控制系统处理;
( b )地址学习功能, 并把学习到的知识保存在转发数据库中;
( c )对非控制报文的数据帧进行交换处理, 修改数据帧中的数 据分类信息; 虚拟网桥处理单元是装置的处理中心,它固化了以下五部分的内容: ( a )控制报文的格式;
( b )对数据帧的处理步骤和逻辑;
( c )转发数据库中转发表项的格式; ( d )組播数据库中组播表项的格式;
( e )虚拟网桥数据库表项的格式
虚拟网桥数据库、组播数据库和转发数据库负责控制虚拟网桥处 理单元的处理行为,在设备运行期间,数据库中的内容是可以更新的。 组播数据库和转发数据库中的表项具有完全相同的数据格式,每一表 项包含以下信息:
( a )虚拟网桥编号;
( b )虚拟网桥输入端口;
( c )输入的目标地址;
( d )输入的 VLAN编号;
( e )输入的 VMAN编号;
( f )虚拟网桥输出端口; 在组播数据库中, 数据库的码为所有字段的组合; 在转发数据库 中, 数据库的码为除虚拟网桥输出端口外所有字段的组合。 虚拟网桥数据库中的每一表项包含以下信息:
( a )输入的分类编号;
( b )虚拟网桥编号;
( c )端口号;
( d )输出的分类编号; 通过控制接口, 装置外部的控制系统可以实现以下功能:
( a )对上述数据库中的内容进行增加、删除、修改和检索操作; ( b )对虚拟网桥处理单元的工作状况进行监控。 其中,虚拟网桥装置通过装置间接口与数据处理调度装置进行连 接。 虚拟网桥装置通过控制接口与设备的控制系统进行连接。 图 6 ( F1 )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案的虚拟网桥装置处理装置间接口进入的 数据的流程图。对从装置间接口进入装置的数据帧,虚拟网桥处理单 元的处理步骤。
首先, 在步骤 1 : 判断数据帧是否为控制报文, 如果为非控制 报文, 则跳转至步骤 3执行;
在步骤 2 : 通过控制接口单元, 将数据帧传送给外部的控制系 统, 跳转至步骤 1 7执行;
在步骤 3: 在数据帧的固定位置, 提取出输入数据分类编号信 息、 目标地址、 源地址、 VLAN编号、 VMAN编号 (可选);
在步骤 4 : 以提取的数据分类编号信息作为关键字, 对虚拟网 桥数据库进行检索;
在步驟 5 : 判断检索结果, 如果检索结果为空, 则丢弃此数据 帧, 跳转至步驟 1 7执行;
在步骤 6: 从检索结果中取出虚拟网桥编号和端口号信息; 在步骤 7: 进行源地址学习, 根据学习结果, 更新转发数据库; 在步骤 8: 判断目标地址是否为组播地址, 如果为组播地址, 则首先执行组播子流程, 然后跳转至步骤 1 7执行;
在步骤 9: 判断目标地址是否为广播地址, 如果为广播地址, 则 首先执行广播子流程, 然后跳转至步骤 1 7执行;
在步骤 1 0 : 以虚拟网桥编号、 输入端口、 目的地址、 VLAN编号、 VMAN编号 (可选)作为关键字, 对转发数据库进行检索;
在步骤 11 : 判断检索结果, 如果检索结果为空, 则首先执行广 播子流程, 然后跳转至步骤 1 7执行;
在步骤 12 : 从检索结果中提取输出端口号的信息;
在步骤 13: 以虚拟网桥编号和输出端口号作为关键字, 对虚拟 网桥数据库进行检索;
在步骤 14: 判断检索结果, 若检索结果为空, 则丢弃此数据帧, 跳转至步骤 1 7执行;
在步骤 15: 从检索结果中提取输出分类编号的信息, 并对数据 帧进行修改, 把数据帧中的分类编号更换为输出数据分类编号; 在步骤 16: 把修改后的数据帧通过装置间接口输出到装置外部; 在步骤 17 : 处理结束。 图 7 ( F )描绘本发明的同步数字传送网上以太网数据帧接入和 传送的系统的优选实施方案的数据处理调度装置处理进入装置的数 据的流程图。 数据处理调度单元对进入装置的数据帧的处理步骤如 下:
步骤 1: 提取数据帧中的分类编号的信息;
步骤 2: 以提取的分类编号为索引 ,对处理流程数据库进行检索; 步骤 3: 判断检索结果, 如果检索结果为空, 则丢弃此数据帧, 跳转至步骤 6执行;
步骤 4: 从检索结果中提取出装置间接口编号信息;
步骤 5: 通过与装置间接口编号所对应的装置间接口, 将数据帧 发送到装置外部;
步骤 6: 处理结束。 该系统的应用:
运营商利用图 4的系统可为用户提供以太网服务,对应着若干处 理流程的组合。 运营商可以根据网络拓朴、 用户的服务需求、 带宽资 源的情况灵活的定义和选择所需要的处理流程组合。经常使用的处理 流程的组合有以下几种:
处理流程组合 1 :
( 1 )虚拟接口装置对数据帧进行分类;
(2)虚拟接口装置将数据帧输出到相应的设备接口。
处理流程组合 2:
(1)虚拟接口装置对数据帧进行分类;
(2)虚拟网桥装置对数据帧进行交换;
(3)虚拟接口装置将数据帧输出到相应的设备接口。 处理流程組合 3:
(1)虚拟接口装置对数据帧进行分类;
(2)虚拟专线装置对数据帧进行处理(中继、汇聚或解汇聚处理);
(3)虚拟接口装置将数据帧输出到相应的设备接口。
处理流程组合 4:
( 1 )虚拟接口装置对数据帧进行分类;
(2) RPR装置对数据帧进行处理 (数据帧传送终结、 数据帧传送中 继、 数据帧传送开始);
(3)虚拟接口装置将数据帧输出到相应的设备接口。 在实现装置的具体功能的时候,装置制造商可以完全或部分采用 本系统和方法。对于一些功能比较筒单的装置, 部分装置是可以不需 要的。 功能比较筒单的装置中, 处理流程也是非常筒单的, 装置制造 商甚至可以通过固定各装置之间的连接关系,从而对处理流程进行固 化, 达到省略掉数据调度处理装置的目的。 例如对于仅仅提供以太网 数据专线服务的设备而言, 装置中可以仅包括以下装置:
(1)一个或多个用户网络接口
(2)一个或多个网络间接口和映射解映射装置
(3)虚拟接口装置
(4)虛拟专线装置 该装置中支持的处理流程组合: (1)处理流程组合 1 ;
(2)处理流程组合 3。
使用本发明的系统和方法,可以为用户提供完整的虚拟局域网服 务。使用本发明的系统和方法, 消除了对用户网络接口上的以太网数 据帧地址空间的限制。 当一个网络的装置上接入多个用户的以太网 数据帧的时候, 对用户以太网数据帧的地址空间没有任何限制。
使用本发明的系统和方法, 可以同时在一个设备接口(用户网络 接口或网络间接口)上支持虚拟局域网服务和以太网数据专线服务, 可以同时在一个设备接口上接入和汇聚多个用户的以太网数据帧,极 大的提高了装置的接入和汇聚能力。
使用本发明的系统和方法,运营商可以根据网絡拓朴、 用户服务 需求、 带宽资源等具体情况, 通过对装置内部的处理流程进行灵活的 调整, 最大限度的发挥装置的处理能力和带宽资源的利用率。
使用本发明的系统和方法,可以便捷迅速的为用户提供个性化的 服务。运营商可以通过创建新的流程组合, 在无需升级和购买装置的 前提下, 为用户提供新的服务。
通过本发明, 对从设备接口进入装置的数据, 先进行分类, 再进 行处理, 不同的数据分类对应着不同的处理流程; 这由 虚拟接口装 置实现。
现有的技术方案和装置实现中, 有一个假设: 从一个设备接口进 来的数据帧是同一类数据帧,不同类型的数据帧一定是通过不同的设 备接口进入装置的。 因此, 在以前的技术方案和装置实现中, 从一个 设备接口进来的数据帧有共同的处理流程,处理流程和装置接口的对 应关系为 1 : n。 因此如果要接入的数据类型很多的话, 往往会出现 装置的处理能力仍然有很多富余,但是已经没有空闲的设备接口来接 入业务了。
而在本发明的系统和方法中, 从一个设备接口进来的数据帧可 以包含多种类型, 不同类型的数据帧的处理流程可以是截然不同的, 处理流程和设备接口的对应关系为 m: n 。
另外, 本发明使处理流程可以进行任意的组合; 数据处理调度 装置和它所使用的处理流程组合是本发明的重要组成部分。
在现有的技术方案和装置实现中, 没有数据处理调度装置, 装置 中仅仅支持若干种固定的处理流程, 灵活性和弹性不足。 实际上, 运 营商对装置功能的要求是不断变化的。
缺少灵活性和弹性的装置不能很好的适应环境的变化。 本发明 中,运营商用户可以对装置的处理流程进行动态更新,运营商用户可 以选择装置提供的流程组合, 也可以根据情况, 自己创造和编写新的 流程组合。 22种处理流程组合是有机的组合。 在现有的技术方案和装置实现中, 网桥装置的数目是固定的, 只 能通过对用户的数据帧地址空间做限制的方式来避免出现用户数据 帧的地址空间冲突的情况。 而本发明中, 本发明的虚拟网桥装置, 可 以动态的增加虚拟网桥,每个虚拟网桥的地址空间都是独立的, 不同 的虚拟网桥对应着不同的用户,因此本发明对用户的数据帧地址空间 没有任何限制。 另外, 通过为数据帧在发送前增加标签, 在传送中更换标签, 和 在数据帧的目的地去除标签的方式来实现多个不同用户的数据帧在 同一物理通道上的隔离、传送和共享,实现了本发明的虚拟专线装置。 虽然通过实施例描述了本发明, 本领域一般技术人员知道, 不脱 离本发明的精神, 可以有许多改进和变形, 这些改进和变形及等效变 换均在本发明的保护范围内。

Claims

权 利 要 求
1、 一种数字传送网上不同的数据帧接入和传送的系统, 用于将 不同的数据帧接入和相互传送, 所述系统包括:
至少一个用户网络接口, 用于与用户的网络辆合; 和 /或至少一 个网络间接口, 用于与所述数字传送网耦合以传送数据; 和
数据转换装置, 耦合到所述用户网络接口与所述网絡间接口, 用 于转换所述用户网络接口间的数据格式或转换所述网络间接口的数 据格式或在所述网络间接口和所述用户网络接口间转换数据格式; 其中,所述数据转换装置包括虚拟专线装置和接口装置和处理装 置,所述虚拟专线装置通过所述接口装置将所述用户网络接口的数据 与所述网络间接口的数据交互,所述虚拟专线装置包括:装置间接口, 耦合到所述处理装置, 用于输入与输出数据帧; 虚拟专线处理单元, 耦合到装置间接口, 以汇聚或解汇聚处理数据帧, 检测出控制报文; 规则数据库,耦合到所述虚拟专线处理单元, 所述规则数据库存储有 各类所述数据帧对应的规则,耦合到所述虚拟接口处理单元以根据所 述规则处理数据; 控制接口单元, 耦合到所述规则数据库和所述虚拟 专线处理单元, 用于控制所述虛拟专线处理单元和所述规则数据库。
2.如权利要求 1所述的数字传送网上的虚拟专线装置, 其中, 所 述规则数据库存储汇聚规则、 解汇聚规则。
3. 如权利要求 2所述的数字传送网上的虚拟专线装置, 其中, 所述规则数据库存储中继规则。
4. 如权利要求 1至 3中任一所述的数字传送网上的虛拟专线装 置, 其中, 数据分类与所述规则的对应关系为 1: 1 , 规则数据库中的 规则包括: 输入数据帧分类编号, 规则类型, 为汇聚 /解汇聚 /中继中 的一种, 标签编号, 输出数据帧分类编号。
5.如权利要求 1所述的数字传送网上的虚拟专线装置, 其中, 所 述虚拟专线处理单元中, 存储有控制报文格式、 处理数据帧的逻辑; 规则数据库中规则的格式。
6.如权利要求 1所述的数字传送网上的虚拟专线装置, 其中, 所 述控制接口单元向装置外部提供控制接口, 通过所述控制接口, 可以 监测虛拟接口处理单元的工作状况,可以对规则数据库中的规则进行 增加、 删除、 修改和检索操作。
7.如权利要求 1所述的数字传送网上虚拟专线装置, 其中, 所述 接口装置和处理装置为虚拟接口装置和数据处理调度装置,所述装置 间接口与所述数据处理调度装置或所述虚拟接口装置相连接。。
8.如权利要求 1 所述的虛拟专线装置在数字传送网上接入和传 送数据帧的方法, 其特征在于包括以下步骤:
. 数据帧从装置间接口进入所述虚拟专线装置,
判断数据帧是否为控制报文,
如果为控制报文, 通过控制接口单元发送数据帧到外部的控制 系统, 处理结束; 如果为非控制报文:提取出输入数据分类编号信 息; 以输入数据分类编号信息为索引, 检索规则数据库;
判断是否检索到分类编号信息:
如果未检索到, 丢弃该数据帧, 处理结束; 如果检索到, 根据规则类型处理数据;
修改数据帧, 通过装置间接口发送数据帧, 处理结束。
9. 如权利要求 8所述的方法, 其中, 步骤才艮据规则类型处理数 据的步骤包括步驟:
判断规则类型,
如果是汇聚规则,在数据帧中的特定位置插入规则中所定义的标 签编号;
如果是解汇聚规则, 在数据帧中的特定位置去除标签编号的信息; 如果是中继规则 ,把数据帧中的特定位置的标签编号更换为本规 则中所定义的标签编号。
10. 如权利要求 9所述的方法, 其中, 步 修改数据帧的步骤包 括用规则中所定义的输出数据帧分类编号替换数据帧起始位置的数 据分类编号信息的步骤。
PCT/CN2003/000674 2003-01-28 2003-08-13 Procede et systeme de reception et de transmission de differentes trames de donnees sur un reseau de transmission numerique WO2004068788A1 (fr)

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US7369551B2 (en) 2008-05-06
EP1589697A4 (en) 2006-06-28
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