CN100428695C - Virtual concatenation group management method and system - Google Patents
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- CN100428695C CN100428695C CNB2006100629998A CN200610062999A CN100428695C CN 100428695 C CN100428695 C CN 100428695C CN B2006100629998 A CNB2006100629998 A CN B2006100629998A CN 200610062999 A CN200610062999 A CN 200610062999A CN 100428695 C CN100428695 C CN 100428695C
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- H—ELECTRICITY
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- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0064—Admission Control
- H04J2203/0067—Resource management and allocation
- H04J2203/0069—Channel allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
- H04J2203/0094—Virtual Concatenation
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Abstract
It tests the vocational quantity of the virtual cascade group (VCG) and checks the bandwidth use state of VCG. If the bandwidth offered by VCG cannot meet the requirement of the transfer business, adds the virtual capacity (VC) to VCG. If the bandwidth offered by VCG exceeds the requirement of the transfer business, then releases the redundant VC in VCG. This method regulates automatically VCG to meet the real business request, offers in time necessary bandwidth, release redundant one and utilizes efficiently the limited bandwidth resource.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of virtual concatenation group management method and system.
Background technology
Along with rapid development of Internet, the important set that data service becomes Network goes out.Ethernet possesses technology maturation, cheap, favorable expandability and is easy to advantages such as management, but these advantages often are confined to one by one in " ether island ", and (Local Area Network, scope LAN) then also comes with some shortcomings to surmount local area network (LAN).
Synchronous digital hierarchy (Synchronous Digital Hierarchy; SDH)/synchronous optical network (Synchronous Optical Network; SONET) transmit data by dividing different time slots; with advantages such as its high reliability, good manageability, stronger network protection and restore funcitonss, in backbone network, metropolitan area network and Access Network, all obtained using widely.Therefore how each telecom operation commercial city faces and to drop on the SDH/SONET network that huge fund builds the problem of transmitting data service better.Therefore press for new technical scheme, advantages such as the maturity of the high reliability of SDH/SONET and ethernet technology and convenient uses all can be brought into play, with the expansion Internet development and protect original networking.
EOS (Ethernet Over SDH/SONET) technology promptly is a kind of good solution.Its falseface is to connectionless full mesh structure, make Ethernet can pass through " pellucidly " metropolitan area network (Metropolitan Area Network, MAN) with wide area network (Wide Area Network, WAN), simultaneously, also simplified Network Management greatly, and effectively utilized original Internet resources to avoid repeated construction.The main process of EOS technical transmission data comprises: the Ethernet data process is encapsulated, is mapped to virtual cascade group (Virtual Concatenation Group, VCG) transmit in and by optical fiber, after opposite equip. is received data, by data being separated mapping, decapsulation so that it is reverted to Ethernet data.VCG wherein is with different virtual containers (Virtual Container, VC) bind together formation, VC can be called as the member of time slot or VCG again, its granular size has VC12, VC3, VC4 etc., with the different bandwidth granularity of correspondence, when the desired bandwidth of business can't be provided by single VC, just need bind together big virtual container set of formation to several VC and come bearing data service.
For realizing that VCG is with professional corresponding, Link Capacity Adjustment Scheme (Link Capacity AdjustmentScheme, LCAS) technology is on the Virtual Concatenation basis, the user can come communicating control information to realize dynamically harmless additions and deletions by overhead byte according to size professional and network condition transmitting order to lower levels adjustment VCG.Yet use existing LCAS technology, because the sudden and unsteadiness of data service, make the network manager inaccurate to the expectation of flow distribution, the bandwidth adjustment that network manager's transmitting order to lower levels is made is not enough to reflect actual bandwidth use and conditions of demand, yet adopt this mode, the result of transmitting order to lower levels adjustment often can't satisfy professional actual demand, and perhaps VCG binding VC too much causes the VC utilance not high.
Summary of the invention
In view of above-mentioned existing in prior technology problem, main purpose of the present invention provides a kind of virtual concatenation group management method and system, makes the network bandwidth satisfy service needed fully, and the more efficient use network bandwidth.
To achieve these objectives, the invention provides a kind of virtual concatenation group management method, this method comprises: the bandwidth usage of judging the virtual concatenation group VCG loaded service; If the shared bandwidth of described business continues to be higher than preset threshold value in a Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business continues to be lower than this threshold value in this Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result surpasses the needs of the business that it transmitted; If the bandwidth that judged result is this virtual concatenation group VCG to be provided surpasses the bandwidth of business demand, then discharge virtual container VC unnecessary in this virtual cascade group.。
In addition, the present invention also provides a kind of virtual cascade group management system, and this system comprises that judge module and virtual container additions and deletions increase module.Wherein:
Judge module, be used to judge the bandwidth usage of virtual concatenation group VCG institute loaded service, specific implementation is, default threshold value in judge module, if the shared bandwidth of described business continues to be higher than preset threshold value in a Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business continues to be lower than this threshold value in this Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result surpasses the needs of the business that it transmitted.
Virtual container additions and deletions module according to the judged result of judge module, can't satisfy the needs of its business of transmitting if judged result is a bandwidth that this virtual concatenation group VCG provides, then is this virtual cascade group increase virtual container VC; If the bandwidth that judged result is this virtual concatenation group VCG to be provided surpasses the needs of the business that it transmitted, then discharge virtual container VC unnecessary in this virtual cascade group.
By technique scheme as can be seen, the present invention takies situation by detecting service bandwidth, for the professional corresponding VCG of bandwidth deficiency increases the VC of binding, and when VCG provides the bandwidth exuberant traffic to need, discharge the unnecessary VC of corresponding VCG binding, realize that VCG adjusts automatically according to business.Thereby, make the network bandwidth satisfy business demand, make full use of the bandwidth resources of network, reduce the time delay of bringing owing to Virtual Concatenation, and the automatic adjustment of bandwidth can accomplish not damage business.
Description of drawings
Fig. 1 is for using the sending end structure figure of EOS technology;
Fig. 2 is a virtual concatenation group management method embodiment flow chart of the present invention;
Fig. 3 is a virtual cascade group management system embodiment schematic diagram.
Embodiment
Core concept of the present invention is: detect the VCG loaded service automatically, according to the variation of service bandwidth demand, the VC that VCG in time newly-increased or that releasing bearing is professional binds if service bandwidth is not enough just for it increases bandwidth, just reduces bandwidth as if the bandwidth surplus.Make professional better transmission, and the network bandwidth is utilized more effectively.
Fig. 1 is the sending end structure figure that uses the EOS technology, as shown in the figure, data processor (DataProcessor, DP) in order to handle the data that insert from ETH1, ETH2, EHT3 interface, this data processor DP can for example be asic chip, network processing unit NP, two layers or three layers of chip etc., in order to realize the processing of data service, so that data can be by Optical Fiber Transmission.The interface that receives data also can be other interfaces such as pos interface, E1 except ether physical layer ETH interface, because interface type and relation of the present invention are little, therefore no longer describes in detail.The mapping chip encapsulates data, VC according to each VCG binding, with data map in different VC, VCG1, VCG2, VCG3 are arranged as shown in the figure corresponding to ETH1, ETH2, EHT3 respectively, wherein VCG1 has bound VCx-1 and two VCx of VCx-2 (VCx can be VC12, VC3 or VC4 etc.), tunneling can adopt GFP, LAPS, HDLC etc., also no longer describes in detail herein.Wherein, when the bandwidth deficiency, the mapping chip in time also can carry out the back-pressure operation during deal with data, shines upon chip deal with data in time so that the user learns.The mapping chip sends data to opposite equip. by the optical fiber of SDH/SONET, carries out the operation opposite with aforementioned device after opposite equip. is received, is the ether data with reduction of data, has finally realized the carrying of SDH/SONET to the ether data.
Use existing LCAS technology, when user's bandwidth demand changes, bandwidth increase and decrease can not guarantee user's request bandwidth obtain reasonably satisfy, can't in time satisfy the needs of customer service bandwidth.Because the sudden and unsteadiness of data service, make the network manager inaccurate to the expectation of flow distribution, the bandwidth adjustment that network manager's transmitting order to lower levels is made is not enough to reflect actual bandwidth use and conditions of demand that the situation too much or very few for the bandwidth of traffic assignments frequently takes place.For example the user may need the 6M bandwidth, because network manager's expectation deficiency, disposed the VCG that comprises 2 VC12 only for this user, each VC12 provides 2M bandwidth, the data that cause this VCG not have enough abilities in time to handle this data processor being sent are so that data processor receives that Flow Control back-pressure or data carried by data are abandoned in a large number; If disposed the VCG that comprises 4 VC12, then bandwidth has remainder VC12 again and wastes, and unnecessary VC12 makes the transfer delay of user data become big.
Fig. 2 is a virtual concatenation group management method embodiment flow chart of the present invention.
As shown in the figure, in the present embodiment, at first carry out step S11, detect virtual concatenation group VCG institute loaded service situation, just detect the bandwidth usage of virtual concatenation group VCG institute loaded service.Detection mode can have multiple, for example in the present embodiment, its detection mode can detect by adding up the bandwidth that data processor in the time period mails to the data traffic of virtual concatenation group VCG, promptly by the data processor statistics its bandwidth that mails to the data traffic of each VCG is added up; In other embodiments, also can add up the data traffic bandwidth that its each VCG receives by the mapping chip, concrete mode can be the data volume of adding up in the buffer memory (Buffer) that shines upon chip, to detect virtual concatenation group VCG institute loaded service situation.Then carry out step S12.
In step S12, judge the bandwidth usage of VCG according to the testing result of step S11, judge bandwidth that VCG provides with respect to its loaded service, whether too much or very few.Judgment mode also has multiple, for example in the present embodiment, can judge by the mode of time window, and its determination methods is first section and first threshold of the default time period (as 24 hours, 48 hours etc.).Be higher than this first threshold if step S11 detects professional shared bandwidth in this time period, then judged result is very few for the bandwidth that this virtual concatenation group VCG provides, and can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business is lower than this first threshold in this time period, then judged result is too much for the bandwidth that this virtual concatenation group VCG provides, and surpasses the needs of the business that it transmitted.The mode of time window can avoid the situation of only a certain moment bandwidth occupied by service just to cause the variation of VCG by the setting-up time section, and level and smooth bandwidth is shaken the frequent adjustment of the VCG that brings.
In other embodiments, also can judge with the mode of dual threshold, its method is: preset first threshold value, two threshold values of second threshold value height, be higher than second threshold value if step S11 detects professional shared bandwidth, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If step S11 detects the shared bandwidth of described business and is lower than the 3rd threshold value, then the bandwidth that provides for this virtual concatenation group VCG of testing result surpasses the needs of the business that it transmitted.Owing between second threshold value and the 3rd threshold value certain limit is arranged, therefore the VCG that also can smoothly bring owing to the bandwidth shake frequently adjusts.
If the bandwidth that the testing result of step S12 provides for this virtual concatenation group VCG can't satisfy the needs of the business of being transmitted, just the bandwidth of VCG is very few, promptly carries out step S13; If the needs that testing result provides bandwidth to surpass its business of transmitting for this virtual concatenation group VCG, just the bandwidth of VCG is too much, promptly carries out step S14.
In step S13, for this virtual cascade group increases binding virtual container VC.In the present embodiment, its mode is: management plane issues the increase member and orders to control plane, and it is that VCG increases new VC automatically that control plane calls LCAS mechanism, to satisfy professional needs.
In step S14, then discharge virtual container VC unnecessary in this virtual cascade group.In the present embodiment, its mode is: management plane issues the minimizing member automatically and orders to control plane, and control plane calls the VC that LCAS mechanism reduces this VCG binding automatically, thereby reduces the time delay of Virtual Concatenation, improves professional service quality QoS.
In addition, need to prove that virtual concatenation group management method of the present invention can manage by all VCG, also can only manage at specific part or indivedual VCG.Owing to only be the variation of management object quantity and management method does not have the difference of essence, so locate also no longer to give unnecessary details for literary composition.
The present invention also provides a kind of virtual cascade group management system, and as shown in Figure 3, in the present embodiment, this system comprises judge module and virtual container additions and deletions module.
Judge module is used to detect the bandwidth usage of virtual concatenation group VCG institute loaded service.In the present embodiment, this judge module can be a data processor, and this data processor is regularly added up the bandwidth of the data traffic that mails to virtual concatenation group VCG, judges the operating position of bandwidth; This module also can be the mapping chip, and this mapping chip is added up the data traffic bandwidth that each VCG receives, for example the data volume of a VCG correspondence is added up in the mapping core shooting sheet buffer memory (Buffer).Determination methods can be earlier a default time period (as 24 hours, 48 hours etc.) and first threshold, in this time period, continue to be higher than presetting first threshold if detect professional shared bandwidth, then judged result is very few for the bandwidth that this virtual concatenation group VCG provides, and can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business continues to be lower than this first threshold in this time period, then judged result is too much for the bandwidth that this virtual concatenation group VCG provides, and surpasses the needs of the business that it transmitted.Or the mode of dual threshold is judged, its method is: default second threshold value and high and low two threshold values of the 3rd threshold value, be higher than second threshold value if detect professional shared bandwidth, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If detect the shared bandwidth of described business and be lower than the 3rd threshold value, then the bandwidth that provides for this virtual concatenation group VCG of testing result surpasses the needs of the business that it transmitted.
Virtual container additions and deletions module is used for the judged result of judge module is handled, and can't satisfy the needs of its business of transmitting if judged result is a bandwidth that this virtual concatenation group VCG provides, then is this virtual cascade group increase virtual container VC; If the bandwidth that judged result is this virtual concatenation group VCG to be provided surpasses the needs of the business that it transmitted, then discharge virtual container VC unnecessary in this virtual cascade group.In the present embodiment, its additions and deletions mode is by being that management plane issues automatically and reduces the member and order to control plane, and control plane calls LCAS mechanism increases or reduce VC among the VCG automatically, does not damage business.
In the embodiment of the invention, VCG increases binding at every turn or the quantity of the VC that discharges is 1, and is too fast when the bandwidth change of business demand, cause needs binding or the VC quantity that discharges more for a long time, through repeatedly achieving the goal after binding or the release.Obviously, in other embodiments, also can once bind or discharge a plurality of VC, perhaps binding or the quantity that discharges VC also according to demand situation be provided with flexibly.
By virtual concatenation group management method of the present invention and system, the VC for the professional corresponding VCG increase of bandwidth deficiency is bound when VCG provides the bandwidth exuberant traffic to need, discharges the unnecessary VC of corresponding VCG binding, realizes that VCG adjusts automatically according to business.Thereby, make the network bandwidth satisfy business demand, make full use of the bandwidth resources of network, reduce because the time delay that Virtual Concatenation brings, and the automatic adjustment of bandwidth can accomplish not damage business, in addition, the manager can be distributed with actual grasp to the size and the time of service traffics by analyzing the adjustment situation of auto-bandwidth.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (5)
1, a kind of virtual concatenation group management method is characterized in that, this method comprises:
Judge the bandwidth usage of virtual concatenation group VCG loaded service;
If the shared bandwidth of described business continues to be higher than preset threshold value in a Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business continues to be lower than this threshold value in this Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result surpasses the needs of the business that it transmitted;
If the bandwidth that judged result is this virtual concatenation group VCG to be provided surpasses the bandwidth of business demand, then discharge virtual container VC unnecessary in this virtual cascade group.
2, as the described method of application claim 1, it is characterized in that:
Described judgement virtual concatenation group VCG institute loaded service is that the bandwidth of the data traffic received by statistics mapping chip detects.
3, a kind of virtual cascade group management system is characterized in that, this system comprises:
Judge module, be used to judge the bandwidth usage of virtual concatenation group VCG institute loaded service, specific implementation is, default threshold value in judge module, if the shared bandwidth of described business continues to be higher than preset threshold value in a Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result can't satisfy the needs of the business of being transmitted; If the shared bandwidth of described business continues to be lower than this threshold value in this Preset Time section, then the bandwidth that provides for this virtual concatenation group VCG of judged result surpasses the needs of the business that it transmitted;
Virtual container additions and deletions module according to the judged result of judge module, can't satisfy the needs of its business of transmitting if judged result is a bandwidth that this virtual concatenation group VCG provides, then is this virtual cascade group increase virtual container VC; If the bandwidth that judged result is this virtual concatenation group VCG to be provided surpasses the needs of the business that it transmitted, then discharge virtual container VC unnecessary in this virtual cascade group.
4, as the described virtual cascade group management system of application claim 3, it is characterized in that:
Described judge module is the mapping chip, this mapping chip add up receive the bandwidth of data traffic judge.
5, as the described virtual cascade group management system of application claim 3, it is characterized in that:
Described judge module is a data processor, and this data processor statistics mails to the bandwidth of the data traffic of virtual concatenation group VCG, and judges the operating position of described bandwidth.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020150117A1 (en) * | 2001-03-27 | 2002-10-17 | Hidekazu Baba | Data repeater equipment having bandwidth control function, and bandwidth managing apparatus |
| US20050135435A1 (en) * | 2003-12-18 | 2005-06-23 | Fujitsu Limited | Automatic change method of virtual concatenation bandwidth |
| CN1756143A (en) * | 2004-09-27 | 2006-04-05 | 华为技术有限公司 | Time period multiplex system and method for transmission network bandwidth |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020150117A1 (en) * | 2001-03-27 | 2002-10-17 | Hidekazu Baba | Data repeater equipment having bandwidth control function, and bandwidth managing apparatus |
| US20050135435A1 (en) * | 2003-12-18 | 2005-06-23 | Fujitsu Limited | Automatic change method of virtual concatenation bandwidth |
| CN1756143A (en) * | 2004-09-27 | 2006-04-05 | 华为技术有限公司 | Time period multiplex system and method for transmission network bandwidth |
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