WO2004039001A1 - Procede d'emission a debit secondaire d'un service de donnees utilisateur dans un emetteur de reseau longue distance - Google Patents

Procede d'emission a debit secondaire d'un service de donnees utilisateur dans un emetteur de reseau longue distance Download PDF

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Publication number
WO2004039001A1
WO2004039001A1 PCT/CN2003/000897 CN0300897W WO2004039001A1 WO 2004039001 A1 WO2004039001 A1 WO 2004039001A1 CN 0300897 W CN0300897 W CN 0300897W WO 2004039001 A1 WO2004039001 A1 WO 2004039001A1
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WO
WIPO (PCT)
Prior art keywords
label
custom
data frame
user data
user
Prior art date
Application number
PCT/CN2003/000897
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English (en)
Chinese (zh)
Inventor
Wu Yang
Qianfeng Xu
Original Assignee
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 AU2003280542A priority Critical patent/AU2003280542A1/en
Priority to CA2505004A priority patent/CA2505004C/fr
Publication of WO2004039001A1 publication Critical patent/WO2004039001A1/fr
Priority to US11/113,411 priority patent/US7660313B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]

Definitions

  • the user's lease policy for bandwidth is mainly based on the synchronous digital hierarchy (SDH) rate, which is the level of the VC-TRUK bandwidth on the channel side of the metropolitan area network transmission equipment.
  • SDH synchronous digital hierarchy
  • users can lease bandwidths such as VC-12, VC-3, and VC-4.
  • the bandwidth value of VC-12 is 2.048Mbps, and the bandwidth value is the smallest among all leaseable bandwidths. If the bandwidth required by the user is less than 2.048Mbps, and 2.048Mbps is already the minimum bandwidth that the user can lease, so the user must lease a VC-12 bandwidth even if the required bandwidth is less than 2.048Mbps. As a result, system resources are wasted.
  • Ethernet data packets from different ingress ports can be transmitted through the same VC-TRUNCK.
  • Ethernet data packets from different ports are separated and separated. Send to the corresponding egress port respectively.
  • the Ethernet data message here can also be called a data frame. In this way, the data of different users can be transmitted through the same VC-TRUNCK. This effectively avoids waste of resources and improves bandwidth utilization.
  • the terminal transmission device determines the outgoing port of the data frame according to the correspondence between the pre-stored VLAN ID and the outgoing port, so that the data frame is correctly forwarded to the corresponding outgoing port on.
  • the priority defined by the IEEE 802.1 P standard can also be used to assign different priorities to VLANs, so as to achieve a certain level of quality of service (QoS) characteristics.
  • FIG. 2 shows the Ethernet data frame format with VLAN ID supported by IEEE 802.1 Q.
  • a data frame consists of a destination address field, a source address field, an 802.1Q header field, a length / type field, a data field, and a check field.
  • the 802.1Q header field consists of a Tag Protocol Identifier (TPID) and a Tag Control Letter (TCI). They are collectively called a virtual local area network tag (VLAN Tag), where the VLAN ID is an integral part of the TCI.
  • TPID Tag
  • VLAN Tag virtual local area network tag
  • the VLAN ID defined by IEEE 802.1 Q has only 12 bits, so it can only support a maximum of 2 12 VLANs in the entire metropolitan area network, that is, 4096 VLANs.
  • an object of the present invention is to provide a method for transmitting sub-rates of user data services in a metropolitan area network transmission device.
  • the method can enable the metropolitan area network to support more VLANs, thereby promoting the development of the metropolitan area network, and can Freely divide VLAN IDs, bringing greater convenience to users.
  • a method for transmitting user data services in a metropolitan area network transmission device includes:
  • each transmission device in advance to form a forwarding entry corresponding to a custom label and a transmission line;
  • the originating transmission device After receiving the user data frame, the originating transmission device nests a custom label in the user data frame according to the forwarding entry to form a custom data frame, and sends the custom data frame;
  • the terminal transmission device After receiving the custom data frame, the terminal transmission device determines the outbound port of the data frame to be sent by looking up the forwarding entry according to the nested custom label, and then deletes the nested custom label to send the original user data frame to the output. port.
  • the format of the custom label may be the same as the format of the virtual local area network label in the user data frame.
  • the custom label may be a virtual channel line label including at least a virtual channel line identification.
  • the virtual channel line label may further include a field indicating a virtual channel line type.
  • the length of the virtual channel line identifier can be customized.
  • the custom label may be a label that meets the definition of a multi-protocol label exchange protocol.
  • the custom label can be before or after the original VLAN tag in the data frame. It can be seen from the technical solution of the present invention that, by nesting another custom label in the user data frame, the custom label may have a longer number of bits when it is a global variable, or may be different when it is a local variable.
  • the nodes can be flexibly changed to support more virtual local area networks, which breaks through the limitation of only 4096 virtual local networks that can be supported in the prior art, which can greatly promote the development of metropolitan area networks and increase the number of supported user data. Business while reducing costs.
  • the virtual local area network identifier in the user data frame may not be unique, thereby simplifying the security isolation of user data and facilitating user operations.
  • FIG. 1 is a schematic diagram of transmitting user data between transmission devices of a metropolitan area network using a sub-rate transmission method
  • FIG. 2 shows a frame format of an Ethernet data frame according to the prior art
  • FIG. 3 is a flowchart of the overall processing of the present invention.
  • FIG. 4 shows a tag nesting manner according to the first embodiment of the present invention
  • FIG. 6 shows a tag nesting manner according to the first embodiment of the present invention.
  • each transmission device receives a forwarding entry and updates a pre-stored forwarding table according to the received forwarding entry.
  • the forwarding entry here can be configured and delivered by the network administrator when multiple user data frames pass through the VC-TRU CK between transmission devices, or it can be configured and delivered by the network administrator when the user leases a line.
  • each transmission device in the metropolitan area network stores a forwarding table representing a correspondence relationship between a self-defined label and a transmission line in advance.
  • this forwarding table is used to determine the custom label of the data according to the incoming port number and the VLAN ID of the data, that is, the custom label is determined according to the transmission line that the data needs to pass through.
  • this forwarding table is used to determine the next channel based on a custom label, and for a terminal transmission device, this forwarding table is used to determine a port based on a custom label.
  • the starting transmission equipment, intermediate transmission equipment, and terminal transmission equipment here are all related to the transmission line through which the entire data passes. You can add or change entries in this forwarding table.
  • step 302 the transmission device receives a user data frame through a Gigabit Ethernet / 100 Gigabit Ethernet (GE FE) port.
  • GE FE Gigabit Ethernet / 100 Gigabit Ethernet
  • step 303 after receiving the user data frame, the originating transmission device sets a custom label mode according to business requirements, and then embeds a corresponding custom label in the user data frame by using hardware, software, or a combination of hardware and software. To form a custom data frame.
  • This custom data frame is then sent to the terminal's transmission device via VC-TRUNCK.
  • step 304 the terminal transmission device receives the user-defined data frame sent in step 303 through its GE / FE port.
  • step 305 after receiving the custom data frame, the terminal transmission device extracts the nested label from the custom data frame, and searches the forwarding table by using the extracted nested label information. Entry, and then delete the nested label, and send the data frame to the egress port corresponding to the user according to the forwarding entry, so that the data frame is correctly sent to the user.
  • step 303 For the custom label mode mentioned in step 303, three embodiments are described in detail below.
  • FIG. 4 shows a tag nesting manner according to the first embodiment of the present invention.
  • the nested custom tag is a VLAN tag, that is, a custom tag with the same definition as the original VLAN tag is added before the VLAN tag in FIG. 2.
  • the custom label can be a local variable, that is, there can be different custom labels between different nodes between two transmission devices, and this custom label is not required to be consistent throughout the transmission process. . This is because the nested custom tags only have 12 bits.
  • the specific process is as follows: When multiple user data frames are transmitted between the transmission devices through the same VC-TRUNCK, the network administrator configures the nested VLAN ID data area to distinguish different users. Data services, and deliver forwarding entries to all transmission devices. After the metropolitan area network transmission device receives the user data frame, when it is determined that there is a user data service sub-rate transmission, the metropolitan area network transmission device adds a nested custom tag with the same VLAN tag format and transmits it according to the forwarding table. After receiving the data frame with the nested label, the terminal transmission device deletes the nested custom label, and then sends the user data frame to the user according to the correspondence between the custom label and the egress port in the forwarding table.
  • the search for the forwarding channel adopts the "Port + VLAN + nested VLAN" method.
  • the nested VLAN is a local variable, which together with the VLAN and Port constitute the destination address of the user data frame. Therefore, the VLAN ID in the user data frame may not be unique across the entire network. You only need to configure the nested VLAN ID between the two nodes of the transmission device.
  • FIG. 5 shows a tag nesting method according to a second embodiment of the present invention.
  • the nested custom tag is a VCLine tag, that is, a VCLine custom tag is added before the VLAN tag in FIG. 2, and the tag uses a global variable.
  • a tag nested before an 802.1Q tag is composed of a VCLine field and a Type field.
  • the operator When a user leases a line from an operator, each time a leased line is configured, the operator will assign a VCLine ID to the user, and the user can customize the length of the VCLine ID.
  • the Type field is a field that is not used by the IEEE organization and can be used by device manufacturers. Here, it can be used to indicate the type of VCLine. In this method, since the user can customize the length of the VCLine ID, it can define a length greater than 12 bits, so that it can easily support more VLANs.
  • the processing flow is as follows: In the process of configuring the network leased by the user from the operator, the network administrator directly delivers the VCLine ID to all transmission devices. In the forwarding entry. After the transmission device at the beginning of the metropolitan area network receives the user's 802.1Q VLAN data frame, the metropolitan area network transmission device adds a nested VLAN tag to the data frame regardless of whether the user data service is transmitted at a subrate. The terminal transmission device receives the data with the VCLine ID, deletes the VCLine ID, and sends an 802.1Q data frame to the user.
  • this embodiment only needs to use "VCLine ID” to find, so it has higher forwarding efficiency.
  • the VCLine ID is a global variable, and Its length can be customized by the user, so there is no limit to the user data services it supports.
  • FIG. 6 shows a tag nesting manner according to a third embodiment of the present invention.
  • the nested custom label is a multi-protocol label switching (MPLS) label, that is, an MPLS label is added after the VLAN tag in FIG. 2, and the label uses local variables.
  • MPLS multi-protocol label switching
  • the MPLS label is a label that meets the definition of the MPLS protocol.
  • the Label field is equivalent to the VLAN ID in the first embodiment, but compared to the first embodiment, the Label field here is 20 bits. Therefore, more VLANs can be supported.
  • the processing flow is as follows:
  • the network administrator configures an MPLS label to distinguish different user data services. And deliver forwarding entries to each transmission device.
  • the MAN transmission device receives the user's data frame, it adds a nested MPLS label.
  • the terminal transmission device receives the data frame with the nested MPLS label, it deletes the nested MPLS and sends the data frame to the user.
  • the forwarding entry is searched by using the Label field in the MPLS label.
  • the forwarding entry is statically configured to support user data service packets as MPLS-type packets. Text.
  • the custom label in the third embodiment can also use global variables, so that when a user leases a line from an operator, the custom label can be configured and the corresponding entries can be delivered to all transmission devices.
  • the position where the custom tag is nested into the original data frame may be different.
  • the custom tag may be placed behind the original VLAN tag.
  • the custom label in the second embodiment can also use local variables.
  • the custom label in the present invention is not limited to the formats proposed in the three embodiments, and may also adopt a format conforming to other communication protocol definitions. Therefore, it can be understood that all descriptions of the present invention are schematic and are not intended to limit the scope of the claims. For the technology in this field As far as the person is concerned, any modification, improvement or equivalent replacement can be made to the invention without departing from the spirit and essence of the invention.

Abstract

L'invention porte sur un procédé d'émission à débit secondaire d'un service de données utilisateur dans un émetteur de réseau longue distance. Ce procédé consiste à configurer chaque émetteur à l'avance, former les étiquettes personnalisées et l'article de table de réacheminement correspondant aux lignes d'émission. Après réception de la trame de données utilisateur, l'émetteur initial enchâsse l'étiquette personnalisée dans la trame de données utilisateur de façon à former la trame de données personnalisée, puis envoie la trame de données personnalisée. Après réception de la trame de données personnalisée, l'émetteur du terminal détermine le port de sortie pour émettre la trame de données en recherchant l'article de l'étiquette de réacheminement d'après l'information d'étiquette personnalisée enchâssée, puis supprime ladite étiquette enchâssée et envoie la trame de données de l'utilisateur d'origine au port de sortie prédéterminé. Cette invention permet d'augmenter considérablement la quantité du réseau local virtuel supporté par le réseau longue distance en enchâssant une étiquette personnalisée, ce qui facilitera le développement du réseau longue distance, et simplifie également le dispositif d'étiquette des données utilisateur, conférant ainsi à l'utilisateur plus d'avantages.
PCT/CN2003/000897 2002-10-25 2003-10-24 Procede d'emission a debit secondaire d'un service de donnees utilisateur dans un emetteur de reseau longue distance WO2004039001A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003280542A AU2003280542A1 (en) 2002-10-25 2003-10-24 The sub-rate transmission method of user data service in transmission apparatus of wan
CA2505004A CA2505004C (fr) 2002-10-25 2003-10-24 Methode de transmission a sous-debit pour service de transmission de donnees de l'utilisateur, applicable aux dispositifs de transmission d'un reseau metropolitain
US11/113,411 US7660313B2 (en) 2002-10-25 2005-04-22 Sub-rate transmission method for user data services in transmission devices of a metropolitan area network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 02147438 CN1254051C (zh) 2002-10-25 2002-10-25 城域网传输设备中用户数据业务子速率传送方法
CN02147438.9 2002-10-25

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US11/113,411 Continuation US7660313B2 (en) 2002-10-25 2005-04-22 Sub-rate transmission method for user data services in transmission devices of a metropolitan area network

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AU (1) AU2003280542A1 (fr)
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WO (1) WO2004039001A1 (fr)

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DE102005035201A1 (de) * 2005-07-27 2007-02-08 Siemens Ag Netzknoteneinheit und Verfahren zur Weiterleitung von Datenpaketen
WO2018129556A1 (fr) 2017-01-09 2018-07-12 Ardelyx, Inc. Composés et procédés pour l'inhibition d'un antiport à médiation par échangeur sodium/proton (nhe) dans le traitement de troubles associés à une rétention d'eau ou à une surcharge en sel et de troubles du tractus gastro-intestinal
EP3939964A1 (fr) 2008-12-31 2022-01-19 Ardelyx, Inc. Combinaisons d'inhibition d'un antiport a mediation par nhe dans le traitement de troubles associes a une retention de fluide ou a une surcharge de sel et de troubles du tractus gastro-intestinal
EP4234016A2 (fr) 2019-02-07 2023-08-30 Ardelyx, Inc. Dérivés d'acide glycyrrhétinique destinés à être utilisés dans le traitement de l'hyperkaliémie

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US8194656B2 (en) * 2005-04-28 2012-06-05 Cisco Technology, Inc. Metro ethernet network with scaled broadcast and service instance domains
CN100377548C (zh) * 2005-07-15 2008-03-26 华为技术有限公司 一种实现虚交换的方法和装置
CN101064682B (zh) * 2006-04-29 2010-08-04 华为技术有限公司 光网络终端及其报文处理方法
CN101453673B (zh) * 2006-08-21 2011-09-14 华为技术有限公司 光网络终端及其报文处理方法
CN101616020B (zh) * 2008-06-27 2011-09-21 中兴通讯股份有限公司 告警信息处理方法
CN103475559B (zh) * 2013-09-18 2017-01-11 北京锐安科技有限公司 一种根据报文内容对报文进行处理并转发的方法和系统
CN103532857B (zh) * 2013-10-28 2016-09-14 北京锐安科技有限公司 一种数据转发的方法及装置

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005035201A1 (de) * 2005-07-27 2007-02-08 Siemens Ag Netzknoteneinheit und Verfahren zur Weiterleitung von Datenpaketen
DE102005035201B4 (de) * 2005-07-27 2009-02-26 Siemens Ag Netzknoteneinheit und Verfahren zur Weiterleitung von Datenpaketen
US8081633B2 (en) 2005-07-27 2011-12-20 Siemens Enterprise Communications Gmbh & Co. Kg Network node unit and method for forwarding data packets
EP3939964A1 (fr) 2008-12-31 2022-01-19 Ardelyx, Inc. Combinaisons d'inhibition d'un antiport a mediation par nhe dans le traitement de troubles associes a une retention de fluide ou a une surcharge de sel et de troubles du tractus gastro-intestinal
WO2018129556A1 (fr) 2017-01-09 2018-07-12 Ardelyx, Inc. Composés et procédés pour l'inhibition d'un antiport à médiation par échangeur sodium/proton (nhe) dans le traitement de troubles associés à une rétention d'eau ou à une surcharge en sel et de troubles du tractus gastro-intestinal
EP4234016A2 (fr) 2019-02-07 2023-08-30 Ardelyx, Inc. Dérivés d'acide glycyrrhétinique destinés à être utilisés dans le traitement de l'hyperkaliémie

Also Published As

Publication number Publication date
CA2505004A1 (fr) 2004-05-06
CN1492634A (zh) 2004-04-28
CA2505004C (fr) 2011-08-02
CN1254051C (zh) 2006-04-26
AU2003280542A1 (en) 2004-05-13

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