WO2007009360A1 - Procede et appareil pour retablir une liaison defaillante - Google Patents
Procede et appareil pour retablir une liaison defaillante Download PDFInfo
- Publication number
- WO2007009360A1 WO2007009360A1 PCT/CN2006/001680 CN2006001680W WO2007009360A1 WO 2007009360 A1 WO2007009360 A1 WO 2007009360A1 CN 2006001680 W CN2006001680 W CN 2006001680W WO 2007009360 A1 WO2007009360 A1 WO 2007009360A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- link
- recovery
- inter
- path
- domain
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/04—Interdomain routing, e.g. hierarchical routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
Definitions
- the present invention relates to a link failure recovery technique, and in particular, to a method and apparatus for recovering an inter-domain link failure.
- the service scheduling of the traditional optical network adopts the static configuration of the network management system and does not support the dynamic provisioning mode.
- the traditional optical network mostly adopts linear and ring networking.
- the protection recovery uses multiplex section protection and SNCP (Sub-Network Connection Protection, subnet). Connection protection) is basically a static recovery method.
- SNCP Sub-Network Connection Protection, subnet. Connection protection
- the network needs to be dynamically enabled, and the structure of the mesh network needs to be supported. Need to have flexible scalability and fast protection recovery.
- ASON Automatic Switched Optical Network solves the above problems well.
- ASON has been implemented in the control plane using Generalized Multi-Protocol Label Switching (GMPLS), which has become a core technology in the development of optical networks.
- GPLS Generalized Multi-Protocol Label Switching
- Two new connection types are available in ASON: one is a soft permanent connection and the other is a switched connection.
- ITU-T International Telecommunications Union-Telecommunication Standardization Sector
- the Internet Engineering Task Force (IETF) has completed single-domain signaling and automatic discovery. , protocol extensions and definitions of routes.
- the control plane needs to solve the management problem of large-scale networks.
- the ITU-T and the Optical Internetworking Forum use the hierarchical network model to put a lower control domain on the upper layer.
- the proxy node can publish abstract topologies, inter-domain links, reachable addresses, etc. representing the domain, thus forming a layered network layer by layer.
- the 0 layer 110 is an actual network, and is divided into a plurality of control domains (CD, Control Domain) UK 112, 113, 114.
- each domain of layer 0 110 is abstracted into one node, for example, control domains 111, 112, 113, 114 Corresponding to nodes RC11, RC12, RC13 and RC14, respectively.
- each domain of the 1st layer 120 is abstracted into one node, for example, the control domains 121, 122 correspond to the nodes RC21, RC22, respectively.
- the entire network becomes a 3-layer network topology.
- connection recovery speed becomes a very important bottleneck. Because of the multi-domain case, the connection spans multiple domains, and the number of nodes passing is far more than that of a single domain. This becomes an urgent need after network expansion. solved problem.
- intra-domain tunnels are generally used for local recovery.
- end-to-end connection recovery is used. For example, in FIG. 2, when the inter-domain link N13-N21 between the control domains 210 and 200 is faulty, the label is signaled by RSVP-TE (Resource ReSerVation Protocol-Traffic Engineering).
- the first node Nil of the LSP ( Label Switch Path ) is restored in end-to-end mode.
- the restored route is Nil -> N16 -> N15 -> N14 -> N26 -> N25 -> N24 -> N36 - >N35-N33 0
- the disadvantages of this type of inter-domain link failure recovery method are: Due to the need to recover from multiple control domains end-to-end, the recovery time is long, and network resource planning is not easy.
- the present invention provides a link failure recovery method and apparatus to reduce the recovery time of inter-domain link failures.
- the method for recovering link faults of the present invention is used for multi-layer automatic switching optical network for inter-domain fault recovery, and the method includes:
- the upstream node of the link with the inter-domain link failure initiates local recovery of the link failure; the upstream node and the downstream node are used as the source and sink nodes for local recovery of the link failure.
- the local node of the link initiates a local failure of the link failure when the upstream node of the link detects the fault or when the downstream node of the link detects the fault and notifies the upstream node of the link.
- the upstream node of the link initiates inter-domain local recovery in units of connections or initiates inter-domain local recovery in units of links.
- connection When the connection is started as a unit, when the inter-domain link fails, local recovery is initiated.
- the connection is partially restored, and the other connections are end-to-end;
- link unit when the inter-domain link fails, all services passing through the inter-domain link are locally restored.
- the local recovery of the link failure includes:
- connection controller on the upstream node queries the recovery path of the downstream node
- connection controller After the connection controller obtains the recovery path, the establishment of the recovery path of the upstream node to the downstream node by the protocol controller is started;
- the service is bridged, and the faulty service on the link is bridged to the recovery path.
- the recovery path of the query to the downstream node is:
- connection controller uses the upstream and downstream nodes of the inter-domain link as the source and sink of the restored connection, queries the routing controller for the recovery path, and the routing controller dynamically calculates the recovery path, and returns the recovery path calculation result to the connection controller.
- the recovery path of the query to the downstream node is:
- the recovery path is pre-configured on the connection controller, but the resources are not reserved on the recovery path.
- the connection controller directly queries to obtain a locally saved recovery path using idle resources.
- the recovery path of the query to the downstream node is: the recovery path is pre-configured on the connection controller, and the resource is reserved on the recovery path, and the connection controller directly queries the recovery path for obtaining the locally reserved reserved resource.
- the obtaining, by the connection controller, the recovery path is: performing a switching determination by using a preset ring composed of an inter-domain link and a node.
- the recovery path is a path composed of links between non-fault related links or paths formed by links of other domains.
- the present invention may also include:
- the present invention may also include:
- the device for recovering the fault of the inter-domain link includes:
- a link resource manager configured to implement link fault detection
- connection controller configured to start inter-domain when the link resource manager detects a fault Fast recovery, query the recovery path of the downstream node, notify the protocol controller to complete the establishment of the recovery path, and complete the bridging of the 2-terminal service after the 'k complex path is established;
- the protocol controller is used to complete the service establishment of the recovery path.
- the device further includes: a routing controller; the connection controller uses the endpoint of the inter-domain link as the source and sink of the restored connection, queries the routing controller for the recovery path, and the routing controller dynamically completes the calculation of the recovery path.
- connection controller queries to obtain a locally saved pre-configured recovery path and uses idle resources or uses reserved resources.
- the invention initiates link failure local recovery by the upstream node of the link of the inter-domain link failure, and then performs local recovery of the link failure by using the upstream node and the downstream node as the source and sink nodes.
- the recovered path can be dynamically calculated due to the local link failure between the upstream node and the downstream node of the faulty link.
- the recovered path can be pre-configured or resource reserved for recovery bandwidth sharing. Link failure recovery speed and bandwidth savings.
- FIG. 1 is a schematic diagram of a model of a prior art hierarchical network
- FIG. 2 is a schematic diagram of an end-to-end failure recovery of the prior art
- FIG. 3 is a flow chart of an embodiment of a method for recovering a link failure according to the present invention.
- FIG. 4 is a schematic diagram of an embodiment of the present invention for performing fault recovery using an inter-domain link
- FIG. 5 is a schematic diagram of an embodiment of the present invention for performing fault recovery using links of other domains.
- DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention adopts local fast recovery in the event of an inter-domain link failure.
- the recovered path can be dynamically calculated, pre-computed, or resource reserved for recovery bandwidth sharing, and the recovery path can be another between domains.
- the link can also be restored through other domains, which can greatly improve the recovery speed and bandwidth of inter-domain faults.
- it provides a coordination mechanism for fast recovery and end-to-end recovery between domains.
- the fault recovery method mainly includes the following steps: Step 11: When the inter-domain link is faulty, determine the recovery method at the source end of the link, if the recovery method is local fast recovery, go to step 12, otherwise go to step 13;
- Step 12 Local fast recovery is adopted, that is, when the link is faulty, the upstream node and the downstream node of the link that determines the link failure between the domains are started, and the link fault recovery is started, and the upstream node and the downstream node are used as the source and sink nodes. Perform link failure recovery.
- step 13 can be performed in an end-to-end manner for fault recovery;
- Step 13 End-to-end recovery is performed by using the end-to-end failure recovery.
- the link failure recovery method for performing local fast recovery of the present invention will be described below in a specific manner.
- the upstream node of the link when an inter-domain link failure is detected, the upstream node of the link (referred to as a failure recovery point) initiates fast failure recovery between the domains.
- the upstream node of the link when the upstream node of the link detects the fault, the upstream node of the link initiates the link fault recovery between the domains or when the downstream node of the link detects the fault, the upstream node of the link is notified.
- the upstream node initiates failover between domains.
- the user can initiate fast recovery between domains in units of connections, and can also initiate fast recovery between domains in units of links.
- a connection when the inter-domain link fails, the connection that initiates the fast recovery is partially restored quickly, and other connections are still end-to-end.
- the link is faulty, when the link fails, All services of this inter-domain link perform local fast recovery.
- a variety of scenarios can be supported at the source end of the inter-domain link, such as dynamically calculating the recovery mode and pre-configuring the recovery path.
- the two endpoints of the inter-domain link calculate the route for the source and sink of the restored connection, obtain the recovery path, and then initiate the restoration path establishment and service switching by signaling according to the recovery path.
- the present invention can be implemented in two ways.
- One is a preset recovery path, but no resources are reserved, that is, the two endpoints of the inter-domain link are the source and sink of the restored connection, and the establishment of the restoration path and the switching of the service are initiated by the signaling according to the preset recovery path. , use idle resources on the recovery path.
- the other is a preset recovery path
- the recovery path reserves resources, that is, the two endpoints of the inter-domain link are the source and sink of the restored connection, and the establishment and operation of the recovery path are initiated by signaling according to the preset recovery path. Switching, using reserved resources on the recovery path, these reserved resources can be shared by fault-independent connections.
- the recovery path may be other methods, for example, the inter-domain link and the node form a p-cycle (preset ring), etc. .
- this partial recovery of the present invention may be returned or non-returnable.
- the returnable mode after the inter-domain link failure is removed, the connection is returned to the original path (via this link).
- the fast failover path between domains may be other links between two domains that do not belong to a non-associated fault SRLG (shared risk contact group), or may be restored through other domains. If fast recovery between domains cannot be completed , then start the end-to-end recovery of the business to ensure the survivability of the business to the greatest extent.
- SRLG shared risk contact group
- N10 -> Nil -> N12 -> N13 -> N26 -> N25 -> N24 -> N44 -> N45-N43 when the inter-domain link N13-N26 between the control domains 410 and 420 fails, the N26 is restored as a sink node on N13, and the recovery path can be dynamically calculated, which can be preset, assuming It is N13->N14->N21->N26.
- N13 is used as the source, and N26 is the sink.
- the restoration path is established and the service is switched. The service can be quickly restored. If the fast recovery fails, the end-to-end recovery is started, and the maximum protection service survivability is achieved.
- the link resource manager (LRM, Link Resource Manager) on the N13 detects the failure, notifies the connection controller (CC, Connection Controller), and connects the controller CC to start the inter-domain.
- the connection controller CC can be processed as follows:
- connection controller CC can directly query the locally saved recovery path and use the idle resources;
- connection controller CC can also directly query the locally saved recovery path and use the reserved resources;
- connection controller CC After the connection controller CC obtains the recovery path, it notifies the protocol controller PC (which can use RSVP-TE or other protocols) to complete the service establishment of the recovery path and bridge the service to the recovery path, and the recovery process is basically completed.
- protocol controller PC which can use RSVP-TE or other protocols
- the network has a connection across multiple domains.
- the route is shown by the black line in the figure as N10 -> N11 -> N12 -> N13 -> N26 -> N25 - > N24->N44->N45-N43, when the inter-domain link N13-N26 between the control domains 510 and 520 fails, the N26 is restored as a sink node on N13, due to the control domain 510 and the control domain 52Q. There is only one inter-domain link between them. Therefore, you need to perform fast recovery through other domains (the control domain 530 in this example). Assume that the recovery path is N13->N32->N21->N26. On N13, N13 is used as the source, and N26 is the sink. The restoration path is established and the service is switched. The service can be quickly restored. If the fast recovery fails, the end-to-end recovery is started to maximize the survivability of the service.
- Embodiments of the apparatus for inter-domain link failure recovery of the present invention include: a link resource manager, a connection controller, a protocol controller, and a routing controller.
- connection controller can be processed as follows:
- connection controller uses the two endpoints of the inter-domain link as the source and sink of the restored connection, queries the routing controller for the recovery path, and dynamically calculates the recovery path by the routing controller RC. ;
- the connection controller can directly query the locally saved recovery path and use the idle resource.
- connection controller can also directly query the locally saved recovery path and use the reserved resources;
- the protocol controller is notified to complete the service establishment of the recovery path and the service is bridged to the recovery path, and the recovery process is basically completed.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2006800123202A CN101160761B (zh) | 2005-07-15 | 2006-07-14 | 链路故障的恢复方法及装置 |
DE602006005466T DE602006005466D1 (de) | 2005-07-15 | 2006-07-14 | Verfahren zum herstellen einer versagten verbindung und gerät dafür |
EP06761427A EP1845640B1 (en) | 2005-07-15 | 2006-07-14 | Method for restoring link failure and apparatus thereof |
US11/881,804 US20080031619A1 (en) | 2005-07-15 | 2007-07-27 | Method and device for recovering from inter-domain link failure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB2005100358968A CN100446467C (zh) | 2005-07-15 | 2005-07-15 | 链路故障的恢复方法 |
CN200510035896.8 | 2005-07-15 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/881,804 Continuation US20080031619A1 (en) | 2005-07-15 | 2007-07-27 | Method and device for recovering from inter-domain link failure |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007009360A1 true WO2007009360A1 (fr) | 2007-01-25 |
Family
ID=37298023
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2006/001680 WO2007009360A1 (fr) | 2005-07-15 | 2006-07-14 | Procede et appareil pour retablir une liaison defaillante |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080031619A1 (zh) |
EP (1) | EP1845640B1 (zh) |
CN (2) | CN100446467C (zh) |
AT (1) | ATE424665T1 (zh) |
DE (1) | DE602006005466D1 (zh) |
ES (1) | ES2323731T3 (zh) |
WO (1) | WO2007009360A1 (zh) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2921779B1 (fr) * | 2007-09-28 | 2011-02-18 | Alcatel Lucent | Communication d'une information de risque dans un reseau multi-domaine |
CN100589416C (zh) * | 2007-10-30 | 2010-02-10 | 中兴通讯股份有限公司 | 一种自动交换光网络系统中业务产生告警时的维护方法 |
CN101563866B (zh) * | 2007-11-21 | 2012-10-03 | 中兴通讯股份有限公司 | 一种自动交换光网络及该网络中的数据传输方法 |
CN101715149B (zh) * | 2009-07-21 | 2013-01-23 | 北京邮电大学 | 一种多层多域分布式光网络并行跨域故障恢复方法和装置 |
EP2678980B1 (en) * | 2011-02-22 | 2017-12-06 | Telefonaktiebolaget LM Ericsson (publ) | A fault protection method and fault protection apparatus in a multi-domain network |
US8804485B2 (en) | 2011-05-06 | 2014-08-12 | Tellabs Operations, Inc. | Method and apparatus for coordinating fault recovery techniques among domains |
CN102291255B (zh) * | 2011-07-22 | 2014-09-10 | 中国电力科学研究院 | 一种电力系统广域保护的通信网络节点装置及其实现方法 |
CN103178976A (zh) * | 2011-12-22 | 2013-06-26 | 迈普通信技术股份有限公司 | 组播树组建及故障恢复方法 |
FR2986558B1 (fr) * | 2012-02-02 | 2014-03-07 | Melchior Jean F | Dispositif de commande variable d'au moins une soupape, par exemple pour un moteur alternatif |
US9197355B2 (en) | 2012-11-27 | 2015-11-24 | Ciena Corporation | Drop port based shared risk link group systems and methods |
CN104348720B (zh) * | 2013-07-25 | 2018-05-04 | 中兴通讯股份有限公司 | 一种多域路径计算失败的处理方法及路径计算单元 |
CN103428031B (zh) * | 2013-08-05 | 2016-04-13 | 浙江大学 | 一种基于软件定义网络的域间链路快速故障恢复方法 |
CN104980351A (zh) * | 2014-12-26 | 2015-10-14 | 深圳市新格林耐特通信技术有限公司 | 一种基于sdn网络的快速重路由方法 |
US10303030B2 (en) * | 2017-05-08 | 2019-05-28 | Reald Spark, Llc | Reflective optical stack for privacy display |
CN110392318B (zh) * | 2019-07-29 | 2021-10-19 | 烽火通信科技股份有限公司 | Ason中控制平面层lsp通道的校验方法及系统 |
CN113727220B (zh) * | 2020-05-26 | 2023-04-11 | 华为技术有限公司 | 业务资源预配置方法、设备和系统 |
CN112929913B (zh) * | 2021-03-31 | 2022-05-27 | 广东电网有限责任公司电力调度控制中心 | 网络切片下基于路由可生存性的虚拟网服务故障恢复方法 |
CN113365165B (zh) * | 2021-06-22 | 2022-07-08 | 烽火通信科技股份有限公司 | 一种传送网重路由业务动态切换的方法和设备 |
CN114040273B (zh) * | 2021-10-25 | 2023-06-23 | 烽火通信科技股份有限公司 | 一种基于故障点自动调整路由倒换的方法及系统 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020131362A1 (en) * | 2001-03-16 | 2002-09-19 | Ross Callon | Network routing using link failure information |
CN1392686A (zh) * | 2002-07-11 | 2003-01-22 | 北京邮电大学 | 一种自动交换光网络可恢复路径选择建立方法 |
WO2003107606A1 (en) * | 2002-06-12 | 2003-12-24 | Cisco Technology, Inc. | Distinguishing between link and node failure to facilitate fast reroute |
CN1499747A (zh) * | 2002-11-07 | 2004-05-26 | 华为技术有限公司 | 一种实现智能光网络保护和恢复的方法 |
WO2004077759A1 (de) * | 2003-02-28 | 2004-09-10 | Siemens Aktiengesellschaft | Verfahren zur schnellen reaktion auf linkausfälle zwischen verschiedenen routing-domänen |
EP1489784A1 (en) * | 2003-06-16 | 2004-12-22 | Alcatel | Restoration in an automatically switched optical transport network |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6377782B1 (en) * | 1999-03-01 | 2002-04-23 | Mediacell, Inc. | Method and apparatus for communicating between a client device and a linear broadband network |
CA2419793C (en) * | 2000-08-15 | 2013-03-12 | Nortel Networks Limited | System, device, and method for managing communication services in an optical communication system |
DE10139155C2 (de) * | 2001-08-09 | 2003-07-24 | Siemens Ag | Signalisierungs-Proxy-Einrichtung zum automatischen Aufbau von Ersatzpfaden in optischen Netzen |
US7127180B1 (en) * | 2001-09-14 | 2006-10-24 | Nortel Networks Limited | System, device, and method for supporting cut-through paths in an optical communication system |
US7471625B2 (en) * | 2001-10-31 | 2008-12-30 | Nec Corporation | Fault recovery system and method for a communications network |
JP2003143145A (ja) * | 2001-10-31 | 2003-05-16 | Nec Corp | 障害回復方法およびパス設定方法および通信ネットワーク並びにそれに用いる集中制御装置およびノード装置 |
EP1383261A1 (en) * | 2002-07-15 | 2004-01-21 | Alcatel | Protection method and system for traffic of different service classes |
US7697417B2 (en) * | 2003-07-18 | 2010-04-13 | Alcatel-Lucent Usa Inc. | Methods and devices for re-routing MPLS traffic |
-
2005
- 2005-07-15 CN CNB2005100358968A patent/CN100446467C/zh not_active Expired - Fee Related
-
2006
- 2006-07-14 AT AT06761427T patent/ATE424665T1/de not_active IP Right Cessation
- 2006-07-14 DE DE602006005466T patent/DE602006005466D1/de active Active
- 2006-07-14 ES ES06761427T patent/ES2323731T3/es active Active
- 2006-07-14 EP EP06761427A patent/EP1845640B1/en active Active
- 2006-07-14 CN CN2006800123202A patent/CN101160761B/zh not_active Expired - Fee Related
- 2006-07-14 WO PCT/CN2006/001680 patent/WO2007009360A1/zh not_active Application Discontinuation
-
2007
- 2007-07-27 US US11/881,804 patent/US20080031619A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020131362A1 (en) * | 2001-03-16 | 2002-09-19 | Ross Callon | Network routing using link failure information |
WO2003107606A1 (en) * | 2002-06-12 | 2003-12-24 | Cisco Technology, Inc. | Distinguishing between link and node failure to facilitate fast reroute |
CN1392686A (zh) * | 2002-07-11 | 2003-01-22 | 北京邮电大学 | 一种自动交换光网络可恢复路径选择建立方法 |
CN1499747A (zh) * | 2002-11-07 | 2004-05-26 | 华为技术有限公司 | 一种实现智能光网络保护和恢复的方法 |
WO2004077759A1 (de) * | 2003-02-28 | 2004-09-10 | Siemens Aktiengesellschaft | Verfahren zur schnellen reaktion auf linkausfälle zwischen verschiedenen routing-domänen |
EP1489784A1 (en) * | 2003-06-16 | 2004-12-22 | Alcatel | Restoration in an automatically switched optical transport network |
Also Published As
Publication number | Publication date |
---|---|
EP1845640B1 (en) | 2009-03-04 |
CN1859156A (zh) | 2006-11-08 |
ATE424665T1 (de) | 2009-03-15 |
EP1845640A4 (en) | 2008-06-18 |
CN100446467C (zh) | 2008-12-24 |
DE602006005466D1 (de) | 2009-04-16 |
ES2323731T3 (es) | 2009-07-23 |
CN101160761B (zh) | 2011-05-11 |
EP1845640A1 (en) | 2007-10-17 |
US20080031619A1 (en) | 2008-02-07 |
CN101160761A (zh) | 2008-04-09 |
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