TWI400911B - Optical user network interface conversion device and method thereof - Google Patents

Description

Optical user network interface conversion device and method thereof

The invention relates to a communication protocol interoperability device and a method thereof, in particular to a device and a method for eliminating the difference of optical user network interface between the two control plane technologies of OIF UNI and IETF GMPLS.

The control network is intelligent in the transmission network, and some functions of the traditional centralized network management system are decentralized to the device, so that each device in the transmission network has signaling functions such as path establishment and removal, and collecting network topology. Information, computing transmission paths and other routing functions to achieve rapid supply, enabling operators to more flexibly and quickly schedule optical channels, reduce maintenance costs, and open up new types of services to increase revenue.

The control plane needs to be standardized to transmit various control signals between different types and different brands of devices. There are currently three standards for control planes, which are the International Telecommunication Union-Telecommunication Standardization Sector of ITU (ASON) (Automatically Switched). Optical Network), IETF's GMPLS and OIF UNI, which can be divided into two categories according to the adopted network model: Peer model and Overlay model, ITU-TASON and OIF UNI both follow the Overlay model, and IETF GMPLS belongs to the Peer model.

In the Peer model, each device in the network supports signaling and routing protocols. The client network and the optical transmission network share information without sharing information, and routing information can communicate with each other. However, in the Overlay model, the optical transmission network is a closed system, and the routing information is not exchanged. The user network cannot know the topology of the optical transmission network, and can only connect to the optical transmission network through the UNI. The control packet sent by the network can only be transmitted to the optical transport network edge device at the other end of the UNI, and then converted into a signaling mechanism inside the optical transport network for processing.

The telecommunications industry has traditionally followed a series of standards developed by the ITU-T International Standards Organization. Therefore, most optical transmission equipment manufacturers adopt the ITU-T ASON architecture, and the optical user network interface of their devices follows the OIF UNI standard, and router manufacturers have always been Adopting the IETF series of standards, mainly following the IETF GMPLS of the Peer model. Because of the different design concepts, the network communication protocols used by OIF UNI and IETF GMPLS are the same but slightly different, and the two cannot communicate with each other, resulting in intelligent control. The effect of the plane has been greatly reduced. This situation has now formed a stalemate. The two parties do not give each other and can only be resolved with the passage of time and the development of future markets or the emergence of new technologies.

It can be seen that there are still many shortcomings in the above-mentioned methods of use, which is not a good design, but needs to be improved.

In view of the shortcomings derived from the above-mentioned conventional methods, the inventor of the present invention has improved and innovated, and after painstaking research, finally successfully developed and completed the optical user network interface conversion device and method thereof.

The object of the present invention is to provide an optical user network interface conversion device and a method thereof, which use OIF UNI, IETF GMPLS two control plane technologies and computer software technology to achieve conversion of optical user network interface communication protocol, so that different follows The control plane standard optical user network interface can communicate.

The optical user network interface conversion device and the method thereof for achieving the above object are analyzed and converted by using an OIF UNI network interface connected to the optical transmission device, an IETF GMPLS network interface connected to the router, and an optical user network interface communication protocol. Technology, as well as computer software programming, to achieve the purpose of the optical user network interface communication protocol conversion. The present invention uses two sets of network interfaces, respectively connected to the OIF UNI device and the IETF GMPLS device, to retrieve the unconverted original control plane communication protocol control packet. The optical user network interface communication protocol analysis and conversion technology of the present invention can parse and control the content of the packet and convert it into another format, and then transmit it from the corresponding network interface, so as to achieve a control plane that can meet different standards. Interoperability.

A User-to-Network Interface (UNI) conversion device and a method thereof, which can achieve the above object, can be a GMPLS (Generalized Multi-Protocol Label Switching) communication developed by the Internet Engineering Task Force (IETF) The protocol control packet is converted into the UNI communication protocol control packet formulated by the Optical Internetworking Forum (OIF), and the OIF UNI version of the protocol control packet can be converted into the IETF GMPLS version to achieve the equipment that complies with the OIF UNI standard and the IETF GMPLS standard. The control planes are interoperable to provide end-to-end intelligent transport services. The conversion device comprises: (1) an OIF UNI network interface for transmitting and receiving control packets from the OIF UNI device; and (2) an IETF GMPLS network interface for transmitting and receiving control packets from the IETF GMPLS device; The OIF UNI to IETF GMPLS conversion module converts the control packet from the OIF UNI interface into the IETF GMPLS format and transmits it from the IETF GMPLS network interface. (4) The IETF GMPLS to OIF UNI conversion module will be from the IETF GMPLS interface. The control packet is converted to the OIF UNI format and transmitted from the OIF UNI network interface.

Please refer to FIG. 1 , which is an application architecture diagram of the optical user network interface conversion device of the present invention. Both ends of the optical subscriber network interface switching device 3 are respectively connected to the network device 1 complying with the OIF UNI standard and the network device 2 complying with the IETF GMPLS standard. The optical user network interface conversion device of the present invention is a bridge between the OIF UNI and the IETF GMPLS standard, converts the received OIF UNI control packet into an IETF GMPLS format, and converts the received IETF GMPLS control packet into an OIF UNI. The format enables the optical user network interfaces that follow different control plane standards to communicate with each other, so as to fully utilize the functions of the intelligent control plane, and can flexibly and automatically schedule the optical path to provide services quickly.

Referring to FIG. 2, the system block diagram of the optical user network interface conversion device of the present invention includes: an OIF UNI network interface 31, an IETF GMPLS network interface 32, and an OIF UNI to IETF GMPLS conversion module. 33. IETF GMPLS to OIF UNI conversion module 34.

The implementation method for converting the OIF UNI protocol to the IETF GMPLS protocol is: the OIF UNI network interface 31 receives the control packet from the OIF UNI device, and then passes it to the OIF UNI to the IETF GMPLS conversion module 33 for protocol analysis. After interpreting the contents of the packet and classifying it, the packet format conversion is performed, and the OIF UNI packet is converted into the IETF GMPLS format. The conversion method is shown in the flowchart of the OIF UNI to IETF GMPLS conversion module shown in FIG. 3, which may include: Detecting and processing OIF UNI control packets that do not use the tunnel function or use the GRE (Generic Routing Encapsulation) tunnel function or the IP-in-IP tunnel function; (b) interpret the contents of the OIF UNI control packet and distinguish it into the need to convert (c) The control packets that do not need to be converted are directly handed over to the IETF GMPLS network interface 32 for transmission to the neighboring IETF, without having to convert or not appear in the three categories of packets of the optical user network interface; GMPLS device; (d) discard packets that should not appear in the optical user network interface; (e) control packets that need to be converted, and change the network bits in the OIF UNI packet content according to the IETF GMPLS standard The address is set to conform to the IETF GMPLS format; (f) the information used by the OIF UNI but not used by the IETF GMPLS is recorded; (g) the OIF UNI is removed according to the IETF GMPLS standard, but The unused parameters of IETF GMPLS make it conform to the IETF GMPLS format; (h) according to the IETF GMPLS standard, the parameters used by IETF GMPLS but not used by OIF UNI, the value of this parameter is derived from the previously recorded OIF UNI information; (i) According to the IETF GMPLS standard, the parameter values in the OIF UNI packet content that are inconsistent with the IETF GMPLS standard are changed to conform to the IETF GMPLS format; the conversion module uses software technology and can be used in conjunction with the control plane. Standard future development, adding new conversion features. Finally, it is transmitted by the IETF GMPLS network interface 32 to the adjacent IETF GMPLS device.

The implementation method for converting the IETF GMPLS protocol to the OIF UNI protocol is: the IETF GMPLS interface 32 receives the control packet sent by the IETF GMPLS device, and interprets the content, classifies, and encapsulates the packet by the IETF GMPLS to OIF UNI conversion module 34. Format conversion, the conversion method shown in Figure 4 is shown in the IETF GMPLS to OIF UNI conversion module flow chart, which may include: (a) detecting and processing unused tunnel functions or adopting GRE tunnel function or IP-in-IP tunnel function IETF GMPLS control packet; (b) Interpret the contents of the IETF GMPLS control packet and distinguish it into three categories: conversion, no conversion, or no packet appearing in the optical user network interface; (c) The control packet that does not have to be converted is directly delivered to the OIF UNI network interface 31 for transmission to the adjacent OIF UNI device; (d) the packet that should not appear in the optical user network interface is discarded; (e) the control that needs to be converted The packet is changed according to the OIF UNI standard, and the setting of the network address in the IETF GMPLS packet is made to conform to the OIF UNI format; (f) the information used by the IETF GMPLS but not used by the OIF UNI is recorded. (g) According to the OIF UNI standard, remove the parameters used by IETF GMPLS, but the OIF UNI does not use it to conform to the OIF UNI format; (h) determine the version of OIF UNI, and according to OIF UNI 1.0 or OIF The UNI 2.0 standard specifies the parameters used by the OIF UNI but not used by the IETF GMPLS. The value of this parameter is derived from the previously recorded IETF GMPLS information; (i) the IETF GMPLS packet is changed according to the OIF UNI standard. The parameter values in the content that are inconsistent with the OIF UNI standard make it conform to the OIF UNI format; this conversion module uses software technology, which can be combined with the future development of international standards related to control planes, adding new conversion functions. Finally, it is transmitted to the adjacent OIF UNI device by the OIF UNI network interface 31. Therefore, the OIF UNI device and the IETF GMPLS device located at both ends of the optical user network interface conversion device of the present invention receive a control plane packet conforming to the relevant standard, and thus can operate normally.

The optical user network interface conversion device and the method thereof provided by the invention have the following advantages when compared with other conventional technologies:

1. The present invention is the first consideration of the development of network equipment, using OIF UNI and IETF GMPLS two control plane technologies, so that UNIs that comply with different standards can be interoperable.

2. The present invention is an expandable design, and the new conversion function can be changed and added at any time by updating the code to cope with the future development of international standards related to the control plane.

3. The invention can greatly improve the autonomy of the telecommunication industry to construct an intelligent transmission network, and is no longer completely restricted by the two camps of OIF UNI and IETF GMPLS, and the economic benefits are very obvious.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

To sum up, this case is not only innovative in terms of technical thinking, but also able to enhance the above-mentioned multiple functions compared with conventional articles. It should be submitted in accordance with the law in accordance with the statutory invention patents that fully meet the novelty and progressiveness, and you are requested to approve this article. Invention patent application, in order to invent invention, to the sense of virtue.

1. . . Network equipment that complies with the OIF UNI standard

2. . . Network devices that comply with the IETF GMPLS standard

3. . . Optical user network interface conversion device

31. . . OIF UNI network interface

32. . . IETF GMPLS network interface

33. . . OIF UNI to IETF GMPLS conversion module

34. . . IETF GMPLS to OIF UNI conversion module

Please refer to the following detailed description of the invention and the accompanying drawings, which will further understand the technical content of the invention and its effect;

1 is an application architecture diagram of an optical user network interface conversion device and method thereof;

2 is a system block diagram of the optical user network interface conversion device and method thereof;

FIG. 3 is a flow chart of the OIF UNI to IETF GMPLS conversion module of the optical user network interface conversion device and method thereof;

FIG. 4 is a flow chart of the IETF GMPLS to OIF UNI conversion module of the optical user network interface conversion device and method thereof.

1. . . Network equipment that complies with the OIF UNI standard

2. . . Network devices that comply with the IETF GMPLS standard

3. . . Optical user network interface conversion device

Claims (10)

An optical user network interface conversion device includes: an OIF UNI to IETF GMPLS conversion module for analyzing the content of an OIF UNI control packet from an OIF UNI network interface and converting the specific OIF UNI control packet, so that It conforms to the IETF GMPLS format, and then transmits the converted OIF UNI control packet from an IETF GMPLS network interface; and an IETF GMPLS to OIF UNI conversion module for analyzing an IETF from the IETF GMPLS network interface. The GMPLS controls the content of the packet and converts the specific IETF GMPLS control packet to conform to the OIF UNI format, and then sends the converted IETF GMPLS control packet from the OIF UNI network interface. The optical user network interface conversion device according to claim 1, wherein the OIF UNI to IETF GMPLS conversion module has the function of detecting and processing unused tunnels or adopting GRE tunnel function or IP-in-IP tunnel function. The function of the OIF UNI control packet. The optical user network interface conversion device according to claim 1, wherein the OIF UNI to IETF GMPLS conversion module has an OIF UNI control packet for interpreting the content of the OIF UNI control packet and dividing it into a conversion, The functions of the OIF UNI control packet that does not need to be converted or the OIF UNI control packet that should not appear in the optical user network interface are processed separately. The optical user network interface conversion device according to claim 3, wherein the OIF UNI to IETF GMPLS conversion module changes the setting of the network address in the content of the OIF UNI control packet to be converted to match IETF GMPLS format. The optical user network interface conversion device according to claim 1, wherein the IETFGMPLS to OIF UNI conversion module has the function of detecting and processing unused tunnel functions or adopting GRE tunnel function or IP-in-IP tunnel function. The GMPLS control packet functions. The optical user network interface conversion device according to claim 1, wherein the IETF GMPLS to OIF UNI conversion module has an IETF GMPLS control packet that interprets the content of the OIF UNI control packet and divides it into a conversion, The IETF GMPLS control packet that does not need to be converted or the IETF GMPLS control packet that should not appear in the optical user network interface is processed separately. The optical user network interface conversion device according to claim 1, wherein the IETF GMPLS to OIF UNI conversion module further needs to convert the setting of the network address in the content of the modified IETF GMPLS control packet, so that Complies with the OIF UNI format. An optical user network interface conversion method, comprising an OIF UNI to IETF GMPLS conversion method and GMPLS MPLS to the OIF UNI conversion method, wherein an OIF UNI control packet is converted into an IETF GMPLS format, and the OIF UNI to IETF GMPLS conversion method The steps include: receiving the OIF UNI control packet from the OIF UNI device from the OIF UNI network interface; detecting and processing the tunnel function of the OIF UNI control packet; interpreting the content of the OIF UNI control packet and distinguishing it into a required The converted OIF UNI control packet, the OIF UNI control packet that does not have to be converted, or the OIF UNI control packet that should not appear in the optical user network interface; If the OIF UNI control packet does not need to be converted, the OIF UNI control packet is forwarded to the IETF GMPLS network interface and transmitted to the adjacent IETF GMPLS device; if it is not in the optical user network interface OIF UNI control packet The OIF UNI control packet is discarded; if it is an OIF UNI control packet that needs to be converted, the conversion step includes: changing the setting of the OIF UNI control packet network address; recording the content of the OIF UNI control packet, used by the OIF UNI, However, the information of the unused parameters of the IETF GMPLS; the parameters of the OIF UNI control packet used by the OIF UNI, but not used by the IETGFMPLS; the IETF GMPLS is added to the OIF UNI control packet, but the OIFUNI is used. Unused parameter, the value of this parameter is derived from the information of the previously recorded OIF UNI parameter; the parameter value of the OIF UNI control packet that is inconsistent with the IETF GMPLS standard is changed; and the converted OIF UNI control packet is converted. Translating an IETF GMPLS control packet into an OIF UNI format by the IETF GMPLS network interface to the adjacent IETF GMPLS device, the IETF GMPLS-to-OIF UNI conversion method step package Include: receiving the IETF GMPLS control packet from the IETF GMPLS device from the IETF GMPLS network interface; Detecting and processing the tunnel function of the IETF GMPLS control packet; interpreting the content of the IETF GMPLS control packet and distinguishing it into an IETF GMPLS control packet to be converted, an IETF GMPLS control packet that does not need to be converted, or not appearing in the optical user network The IETF GMPLS control packet of the interface; if it is an IETF GMPLS control packet that does not need to be converted, the IETF GMPLS control packet is forwarded to the OIF UNI network interface and transmitted to the adjacent OIF UNI device; if it is not present in the optical user network The IETF GMPLS control packet of the road interface discards the IETF GMPLS control packet; if it is an IETF GMPLS control packet that needs to be converted, the conversion step includes: changing the setting of the IETF GMPLS control packet network address; recording the content of the IETF GMPLS control packet In the IETF GMPLS control block, but the OIF UNI does not use the IETF GMPLS parameters information; remove the IETF GMPLS control packet content, the IETF GMPLS adopted, but the OIF UNI unused parameters; in the IETF GMPLS control packet The new OIF UNI is used, but the IETF GMPLS is not used. The value of this parameter is derived from the previously recorded IETF GMPLS parameters. News; IETF GMPLS change the control parameter value and inconsistencies among OIF UNI standard packet content; IETF GMPLS and the converted control packet transmitted by the network interface OIF UNI OIF UNI to the adjacent devices. The optical user network interface conversion method of claim 8, wherein the OIF UNI control module is detected and processed; the tunnel function of the packet includes: detecting and processing the OIF UNI control packet that does not use the tunnel function; Detecting and processing the OIF UNI control packet using the GRE tunnel function; and detecting and processing the OIF UNI control packet using the IP-in-IP tunnel function. The optical user network interface conversion method of claim 8, wherein the detecting and processing the tunnel function of the IETF GMPLS control packet comprises: detecting and processing the IETF GMPLS control packet that does not use the tunnel function; detecting And processing the IETF GMPLS control packet using the GRE tunnel function; and detecting and processing the IETF GMPLS control packet using the IP-in-IP tunnel function.