CN1254051C - User's data service sub speed delivering method in metropolitan area network transmission equipment - Google Patents
User's data service sub speed delivering method in metropolitan area network transmission equipment Download PDFInfo
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- CN1254051C CN1254051C CN 02147438 CN02147438A CN1254051C CN 1254051 C CN1254051 C CN 1254051C CN 02147438 CN02147438 CN 02147438 CN 02147438 A CN02147438 A CN 02147438A CN 1254051 C CN1254051 C CN 1254051C
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- data frame
- label
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- 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]
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Abstract
The present invention discloses a user's data service sub speed rate delivering method in a metropolitan area network by utilizing a self-defining data frame comprising a scarf joint label, which comprises the following steps: retransmission table items are issued to transmission devices; the transmission devices receive the data frame of a user; a self-defining label is scarf-jointed in the received user data frame according to service requirements to form one self-defining data frame which is transmitted; the self-defining data frame with the scarf joint label is received by a remote transmission device; the retransmission table items are found by the remote transmission device by utilizing the scarf joint label in the self-defining data frame, the scarf joint label is deleted, and the user data frame is sent to the user according to the retransmission table items. The method can reduce costs by increasing supported user data service. In addition, because VLAN ID in the user data frame is not unique in the whole network after the label is scarf-jointed. The security isolation of user data is simplified.
Description
Invention field
The present invention relates to a kind of field of communication transmission, particularly the transfer approach of user data service in the metropolitan area network transmission equipment.
Background technology
In city area transmission equipment, the user mainly is a speed according to SDH (SDH (Synchronous Digital Hierarchy)) to renting of bandwidth, i.e. the granularity of city area transmission equipment channel side VC-TRUNK (tunnel) bandwidth and deciding.That is to say, in metropolitan area network equipment, the bandwidth that the user rents can only be VC-12, VC-3, ranks such as VC-4, the minimum level (VC-12) of VC-TRUNCK bandwidth granularity is 2.048Mbps, when the not enough 2.048Mbps of the bandwidth of renting as the user or its multiple and user have taken this VC-TRUNCK bandwidth alone, will cause the waste of MAN transmission network bandwidth.For the bandwidth that makes MAN transmission network is utilized effectively, main employing is the sub-speed tranmission techniques of user data service at present.As shown in Figure 1, the ether data message (being also referred to as Frame) that carries identical or different VLAN ID1 and VLAN ID2 (VLAN ID) from different port transmits data message by same VC-TRUNCK, data separating is come out in terminal equipment again.
At present, the sub-speed tranmission techniques of existing user data service scheme directly adopts IEEE 802.1P/Q standard,, metropolitan area network is divided into a plurality of VLAN (VLAN) that is, for each enterprise distributes one or more VLAN, can not exchange visits between the VLAN.Like this, the data message in same VC-TRUNCK can be discerned by the unique VLAN ID of the whole network, the forwarding thereby realization " port+VLAN " is tabled look-up.Simultaneously, utilize the priority of 802.1P standard definition, can distribute different priority, thereby realize QoS (service quality) characteristic to a certain extent for VLAN.Fig. 2 shows the Ethernet data frame format that has VLAN ID that an IEEE 802.1Q supports.This Frame is made up of DAF destination address field, source address field, 802.1Q header field, length/type field, data field and check field, wherein, 802.1Q header field is made up of TPID (tag protocol identifier symbol) and TCI (tag control information), they lump together and are called as VLAN Tag (virtual local area network tags).As can be seen from Figure 2, the VLAN ID of 802.1Q definition has only 12, therefore can only support 4096 (2 at most on metropolitan area network
12) individual VLAN.Along with the increase of metropolitan area network scale, 4096 VLAN can not satisfy professional demand.In addition, because the division of the VLANID of all enterprises all must be carried out unified planning in whole metropolitan area network, thereby it is very complicated to operate.
Summary of the invention
An object of the present invention is the local area network building restricted problem that the shortage problem of the VLAN ID by breaking through IEEE 802.1Q defined is brought, realize that with low cost extensive VLAN's is end-to-end interconnected.Another object of the present invention is that solution is owing to the division of the VLAN ID of all enterprises all must be carried out the trouble that unified planning brings in whole metropolitan area network.
To achieve these goals, the invention provides a kind of self-defining data frame that utilizes and carry out the method that the sub-speed of user data service transmits in metropolitan area network, this method may further comprise the steps: a) by each transmission equipment being configured to form forwarding-table item; B) transmission equipment receives the user's data frame; C) in the user data frame that receives, be nested into nested label (Tag) forming a self-defining data frame according to business demand, and send this Frame; D) the far-end transmission equipment receives the self-defining data frame that has described nested label; E) the far-end transmission equipment utilizes described nested label lookup forwarding-table item in the described self-defining data frame, deletes this nested label and according to forwarding-table item user data frame is sent to the user.
By utilizing in user data frame nested label to search the forwarding passage, just can break through 4096 restriction of prior art scheme, thereby the user data service by increasing support is to reduce cost.In addition, because after being nested into label, the whole network is not unique for the VLAN ID in the user data frame, thereby the safety isolation of user data is simplified.
Description of drawings
Also with reference to the accompanying drawings the present invention is described in more details below with reference to a plurality of embodiment.
Fig. 1 is the schematic diagram that the metropolitan area network transmission equipment received and sent user data frame;
Fig. 2 is the ethernet frame format that has VLAN ID that IEEE 802.1Q supports;
Fig. 3 is the schematic flow sheet of overall technological scheme of the present invention;
Fig. 4 is according to the described label nested mode of first embodiment of the invention;
Fig. 5 is according to the described label nested mode of second embodiment of the invention;
Fig. 6 is according to the described label nested mode of third embodiment of the invention.
Embodiment
Fig. 3 is the overall procedure block diagram according to the sub-speed transfer approach of user data service of the present invention.As shown in Figure 3, in step 1, each transmission equipment is received forwarding-table item, this forwarding-table item can when a plurality of user data frames are arranged between transmission equipment by tunnel by network manager configuration and issue, also can be when user's leased line just by network manager's configuration distributing in each transmission equipment.In step 2, transmission equipment receives user data frame by gigabit Ethernet or 100 m ethernet (GE/FE) port.Next, in the step 3, transmission equipment is according to the demand of business, the mode that combines with software by hardware, software or hardware is nested into nested label (Tag) in user data frame, thereby form a self-defining data frame, and this self-defining data frame is sent to the far-end transmission equipment by tunnel.In step 4, the far-end transmission equipment receives above-mentioned self-defining data frame by its GE/FE port.At last, in step 5, after receiving the above-mentioned self-defining data frame that has a nested label, the far-end transmission equipment extracts nested label from this self-defining data frame, and utilize the nested label lookup forwarding-table item that extracts, delete nested label then and Frame is transmitted to the user according to forwarding-table item.
From above content, as can be seen, the objective of the invention is that a new self-defining data frame is achieved to form by be nested into label in user data frame.Concerning the those skilled in the art, nested label can adopt multiple known mode in user data frame.Technical problem to be solved by this invention be utilize existing in Frame the method for nested label, according to the difference of label nested position in user data frame, and the locality of label and notion of overall importance, the present invention has provided following several implementations.
First embodiment: at the nested label in front of the 802.1Q of user data frame, label uses local variable
As shown in Figure 4, adopted the nested technology of VLAN among first embodiment, that is, added a VLAN Tag identical before again with 802.1Q definition at the VLAN of 802.1Q Frame Tag (that is the 802.1Q label head among Fig. 2).Like this, when realizing that the sub-speed of customer service transmits, when Frame has the VLAN ID of identical 802.1Q, can discern it by nested VLAN ID.Under the situation that adopts label nested mode shown in Figure 4, its handling process is as follows: when 1) a plurality of user data frames are arranged between two transmission equipments by a tunnel, dispose nested VLAN ID data field by the network manager and distinguish different user data services, and issue in forwarding-table item to two transmission equipment.2) the metropolitan area network transmission equipment receives user's 802.1Q VLAN frame.3) when the sub-speed of user data service transmitted, the metropolitan area network transmission equipment added nested VLAN Tag.4) the metropolitan area network transmission equipment of far-end receives the Frame that has nested VLAN Tag.When 5) having the sub-speed of customer service to transmit, the VLAN Tag that the metropolitan area network transmission equipment deletion of far-end is nested also will send to the user with the 802.1Q frame according to forwarding-table item.In the scheme of the described nested VLAN of first embodiment, to transmitting the mode of searching employing " Port (the port)+nested VLAN of VLAN+ " of passage.Here, described nested VLAN is a local variable, and it has constituted the destination address of user data frame with VLAN and Port.Therefore, the whole network is not unique for the VLAN ID in the user data frame, only needs the nested VLAN ID between two nodes of configuration transmission equipment to get final product.
Second embodiment: at the nested label in front of the 802.1Q of user data frame, label uses global variable.
As shown in Figure 5, in a second embodiment, be nested in 802.1Q label label before and form by VCLine field and Type (type) territory.Here, the inventor has introduced the notion of a VCLine ID (tunnel line identification).As user to operator's leased line the time, leased line of every configuration just have a VCLine ID to produce, and the length of VCLine ID can be by User Defined.In addition, but the Type territory is an IEEE tissue not have to use the field of supply equipment manufacturer use.Adopting under the situation of label nested mode shown in Figure 5, its handling process is as follows: 1) the network manager to the user in the process that the circuit that operator rents is configured, VCLine ID just is issued in the list item through all nodes of transmission equipment.2) the metropolitan area network transmission equipment receives user's 802.1QVLAN frame.3) no matter have or not the sub-speed of user data service to transmit, the metropolitan area network transmission equipment all is added on nested VLAN Tag in the Frame; 4) the metropolitan area network transmission equipment of far-end receives the Frame that has VCLine ID.5) the metropolitan area network transmission equipment of far-end is deleted VCLine ID and the 802.1Q frame is sent to the user.Compare with the mode of utilizing " Port (the port)+nested VLAN of VLAN+ " to search the forwarding passage among first embodiment, present embodiment only need use " VCLine ID " to search, so it has higher forward efficiency.In addition, because VCLine ID is global variable, and its length can be by User Defined, so the user data service of its support without limits.
The 3rd embodiment: at the nested label in back of the 802.1Q of user data frame, label uses local variable.
Adopted the nested technology of MPLS among the 3rd embodiment, that is, after the VLANTag of 802.1Q Frame, add one with the identical label of MPLS (multiprotocol label switching) protocol definition.The structure of MPLS label has been shown among Fig. 6.When the sub-speed of customer service transmitted, user data frame was discerned by the Label field in the nested MPLS label.Under the situation that adopts label nested mode shown in Figure 6, its handling process is as follows: when 1) a plurality of user data frames are arranged between two transmission equipments by a tunnel, dispose MPLS Label (label) by the network manager and distinguish different user data services, and issue in forwarding-table item to two transmission equipment.2) the metropolitan area network transmission equipment receives the user's data frame.3) the metropolitan area network transmission equipment adds nested MPLS label.4) the metropolitan area network transmission equipment of far-end receives the Frame that has nested MPLS label.5) the metropolitan area network transmission equipment of far-end is deleted nested MPLS and Frame is sent to the user.In the scheme of the described nested MPLS of the 3rd embodiment, be to utilize the Label field in the MPLS label to carry out to searching of forwarding-table item, forwarding-table item adopts static configuration, supports that the user data service message is the message of MPLS type.As shown in Figure 6, because the length long enough (20) of Label in the MPLS label, thereby can satisfy the demand of customer service.And only need a kind of mode just can realize the various configurations mode of s.m.p speed.
In this manual, explanation of the present invention is carried out according to a plurality of specific embodiments.Concerning the those skilled in the art, under the situation that does not break away from the spirit and scope of the present invention, can carry out various modifications and conversion to it.For example, in first embodiment, the nested label of local variable is inserted into the front of VLAN Tag, still, also can place it in the back of VLAN Tag, and nested label also can use global variable.Similarly, in the second and the 3rd embodiment, the position of nested label and types of variables also can be changed.In addition, also can adopt the nested label that meets other communications protocol definition.The various remodeling that do not deviate from spirit of the present invention are all in the protection range of the appended claim of the present invention.
Claims (6)
1. carry out the method that the sub-speed of user data service transmits in a metropolitan area network, may further comprise the steps:
(a) by each transmission equipment being configured to form forwarding-table item;
(b) transmission equipment receives the user's data frame;
(c) in the user data frame that receives, be nested into nested label forming a self-defining data frame according to business demand, and send this Frame;
(d) the far-end transmission equipment receives the self-defining data frame that has described nested label; And
(e) the far-end transmission equipment utilizes described nested label lookup forwarding-table item in the described self-defining data frame to delete this nested label of described self-defining data frame then, according to forwarding-table item described user data frame is sent to the user.
2. the sub-speed transfer approach of user data service according to claim 1 is characterized in that, described nested label uses local variable or global variable.
3. the sub-speed transfer approach of user data service according to claim 2, it is characterized in that, described nested label is the VLAN Tag local variable identical with the 802.1Q label definition in the described user data frame, and it and described user data frame have been combined together to form described self-defining data frame.
4. the sub-speed transfer approach of user data service according to claim 2 is characterized in that described nested label is the global variable that contains custom field, and it and described user data frame have been combined together to form described self-defining data frame.
5. the sub-speed transfer approach of user data service according to claim 2 is characterized in that, described nested label is and the identical label local variable of mpls protocol definition that it and described user data frame have been combined together to form described self-defining data frame.
6. according to the sub-speed transfer approach of the described user data service of any one claim in the claim 3,4 or 5, it is characterized in that in step (c), described nested label is nested in the front or the back of the 802.1Q label of user data frame.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147438 CN1254051C (en) | 2002-10-25 | 2002-10-25 | User's data service sub speed delivering method in metropolitan area network transmission equipment |
| CA2505004A CA2505004C (en) | 2002-10-25 | 2003-10-24 | A sub-rate transmission method for user data services in transmission devices of a metropolitan area network |
| AU2003280542A AU2003280542A1 (en) | 2002-10-25 | 2003-10-24 | The sub-rate transmission method of user data service in transmission apparatus of wan |
| PCT/CN2003/000897 WO2004039001A1 (en) | 2002-10-25 | 2003-10-24 | The sub-rate transmission method of user data service in transmission apparatus of wan |
| 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02147438 CN1254051C (en) | 2002-10-25 | 2002-10-25 | User's data service sub speed delivering method in metropolitan area network transmission equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1492634A CN1492634A (en) | 2004-04-28 |
| CN1254051C true CN1254051C (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02147438 Expired - Lifetime CN1254051C (en) | 2002-10-25 | 2002-10-25 | User's data service sub speed delivering method in metropolitan area network transmission equipment |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1254051C (en) |
| AU (1) | AU2003280542A1 (en) |
| CA (1) | CA2505004C (en) |
| WO (1) | WO2004039001A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8194656B2 (en) * | 2005-04-28 | 2012-06-05 | Cisco Technology, Inc. | Metro ethernet network with scaled broadcast and service instance domains |
| CN100377548C (en) | 2005-07-15 | 2008-03-26 | 华为技术有限公司 | Method and device for realizing virtual exchange |
| DE102005035201B4 (en) | 2005-07-27 | 2009-02-26 | Siemens Ag | Network node unit and method for forwarding data packets |
| CN101064682B (en) * | 2006-04-29 | 2010-08-04 | 华为技术有限公司 | Optical network terminal and its packet processing method thereof |
| CN101453673B (en) * | 2006-08-21 | 2011-09-14 | 华为技术有限公司 | Optical network terminal, and packet process method thereof |
| CN101616020B (en) * | 2008-06-27 | 2011-09-21 | 中兴通讯股份有限公司 | Alarming information processing method |
| WO2018129556A1 (en) | 2017-01-09 | 2018-07-12 | Ardelyx, Inc. | Compounds and methods for inhibiting nhe-mediated antiport in the treatment of disorders associated with fluid retention or salt overload and gastrointestinal tract disorders |
| AU2009334511C1 (en) | 2008-12-31 | 2016-08-18 | Ardelyx, Inc. | Compounds and methods for inhibiting NHE-mediated antiport in the treatment of disorders associated with fluid retention or salt overload and gastrointestinal tract disorders |
| CN103475559B (en) * | 2013-09-18 | 2017-01-11 | 北京锐安科技有限公司 | Method and system for processing and transmitting message according to contents of message |
| CN103532857B (en) * | 2013-10-28 | 2016-09-14 | 北京锐安科技有限公司 | The method and device that a kind of data forward |
| EP3661945B1 (en) | 2017-08-04 | 2024-04-03 | Ardelyx, Inc. | Glycyrrhetinic acid derivatives for treating hyperkalemia |
| AU2020218255A1 (en) | 2019-02-07 | 2021-09-09 | Ardelyx, Inc. | Glycyrrhetinic acid derivatives for use in treating hyperkalemia |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999004595A1 (en) * | 1997-07-17 | 1999-01-28 | International Business Machines Corporation | Method and apparatus for multipoint-to-point transmission in an atm network |
| KR100703499B1 (en) * | 2000-12-09 | 2007-04-03 | 삼성전자주식회사 | Database structure for implementing traffic engineering function in multi protocol label switching system and constructing method thereof |
| CN1125545C (en) * | 2001-12-31 | 2003-10-22 | 刘军民 | Data forwarding method for implementing virtual channel transmission in LAN |
-
2002
- 2002-10-25 CN CN 02147438 patent/CN1254051C/en not_active Expired - Lifetime
-
2003
- 2003-10-24 AU AU2003280542A patent/AU2003280542A1/en not_active Abandoned
- 2003-10-24 CA CA2505004A patent/CA2505004C/en not_active Expired - Lifetime
- 2003-10-24 WO PCT/CN2003/000897 patent/WO2004039001A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004039001A1 (en) | 2004-05-06 |
| CA2505004A1 (en) | 2004-05-06 |
| CN1492634A (en) | 2004-04-28 |
| AU2003280542A1 (en) | 2004-05-13 |
| CA2505004C (en) | 2011-08-02 |
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