WO2011026359A1 - 一种光网络中寻找路由和波长分配的方法和装置 - Google Patents
一种光网络中寻找路由和波长分配的方法和装置 Download PDFInfo
- Publication number
- WO2011026359A1 WO2011026359A1 PCT/CN2010/073315 CN2010073315W WO2011026359A1 WO 2011026359 A1 WO2011026359 A1 WO 2011026359A1 CN 2010073315 W CN2010073315 W CN 2010073315W WO 2011026359 A1 WO2011026359 A1 WO 2011026359A1
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- Prior art keywords
- route
- node
- wavelength
- constraint condition
- predetermined
- Prior art date
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- 230000003287 optical effect Effects 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004364 calculation method Methods 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims description 20
- 239000013307 optical fiber Substances 0.000 claims description 17
- 238000012795 verification Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000004458 analytical method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006735 deficit Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013138 pruning Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2581—Multimode transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0256—Optical medium access at the optical channel layer
- H04J14/0257—Wavelength assignment algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0267—Optical signaling or routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0267—Optical signaling or routing
- H04J14/0268—Restoration of optical paths, e.g. p-cycles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0267—Optical signaling or routing
- H04J14/0271—Impairment aware routing
-
- 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]
-
- 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
- H04L45/62—Wavelength based
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
- H04J14/0212—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM] using optical switches or wavelength selective switches [WSS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
- H04J14/0293—Optical channel protection
Definitions
- OADM Optical Add-Drop Multiplexing
- RWA Routing and Wavelength Assignment
- Optical Switching which enables wavelength switching from one fiber to another.
- the constraints include: the uplink and downlink constraints of the head and tail nodes, the internal fiber connectivity of the nodes, the node wavelength resources, etc.; the WA process is responsible for allocating wavelength resources on the calculated routes. Establish an optical path (service tunnel).
- K 4 routes in the R process: 1-2-4 , 1-2-5-4, 1-3-2-4, 1-3-2-5-4, there are several nodes on each route, and secondly, wavelength assignment (WA) is performed, including the available or not available Use, inside the node The connectivity is judged.
- each of the ingress and egress interfaces on the route 1-2-4 has 80 waves: 1->2 (80 waves), 2->1 (80 waves), and 2->4 (80 waves). , 4->2 (80 waves), select a wave in the wave that all nodes of the entire route are not occupied.
- the process specifically includes: Step 101: Form an optical network, configure a connection between optical fibers inside the optical network, and configure a fiber connection at the head and tail node (transport interface).
- step 102 an attempt is made to establish a service tunnel of Node 1 to Node 4.
- the wavelength allocation determining step further comprises: performing optical path damage verification on the routed node and the optical fiber between the adjacent nodes when determining that the link attribute information of the node meets a predetermined constraint condition.
- the wavelength allocation determining step further includes: after selecting the route as the working route, when determining that the working route needs to protect the route, returning to the calculating routing step to calculate a route;
- Each node on the route determines whether the link attribute information of the node meets a predetermined constraint condition, if the predetermined constraint condition is met, the route is selected as the protection route, and ends; if the predetermined constraint condition is not met And returning to the calculating routing step; wherein the meeting the predetermined constraint condition comprises: the node has connectivity, and the node is capable of transmitting an optical signal of a predetermined wavelength.
- An apparatus for finding a route and a wavelength assignment in an optical network comprising: a route control unit, configured to acquire a topology network of an optical network, and in the topology network, calculate at least one route; a first node of the route And the tail node is predetermined, and the at least one route is a part of all routes from the first node to the tail node; and the work route determining unit is configured to determine for each node on the route Whether the link attribute information of the node meets a predetermined constraint condition, if the predetermined constraint condition is met, the route is selected as a work route; if the predetermined constraint condition is not met, the other calculation of the route control unit continues A route is used for decision.
- the routing control unit further includes: a wavelength conversion determining module, configured to convert the wavelength of the optical signal to a predetermined wavelength to satisfy the predetermined constraint when the link attribute information of the node is determined to meet a predetermined constraint condition Condition; and algorithm selection module, set to select recursion Perform the route calculation. .
- FIG. 2 is a schematic flowchart of a method for finding a route and a wavelength allocation in an optical network according to an embodiment of the present invention
- FIG. 5 is a schematic diagram 2 of a topology network of an optical network according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of a process for finding a route, a wavelength distribution, and an optical path damage verification according to an embodiment of the present invention
- FIG. 1 is a schematic structural diagram 1 of an apparatus for finding a route and a wavelength allocation in an optical network according to an embodiment of the present invention
- the internal fiber connectivity (impedance) of a node refers to the bidirectional connectivity between the inbound and outbound interfaces within the node. For a node that the route needs to pass, if the inbound and outbound interfaces of the node do not have bidirectional connectivity, the route cannot be used.
- the operations in the following embodiments are performed on the head node unless otherwise stated.
- the technical solution provided in this embodiment determines whether the wavelength allocation is satisfied after calculating at least one route that satisfies the routing constraint condition; instead of performing wavelength allocation once after calculating more or even all routes; It reduces the large amount of data generated by route calculation, improves the hit rate of available routes, reduces the information interaction between modules, and improves the stability of the system.
- the topology network of the TE link is separated from the tail node to the head node according to the routing direction calculated last time, thereby obtaining a sub-optimal route, and the process proceeds to step 304.
- the protection route determining unit 703 is configured to notify the routing control unit 701 to calculate a piece after determining that the working route requires a protection route after the route is selected as a working route. Routing, for each node on the route, determining whether the link attribute information of the node meets a predetermined constraint condition, if the predetermined constraint condition is met, selecting the route as the protection route, and sending the connection to the connection controller ( If the predetermined constraint is not met, the routing control unit 701 is notified to calculate another route, and the route is determined; wherein the predetermined constraint condition includes at least: the node With connectivity, the wavelength resource information of the node indicates that the node is capable of transmitting an optical signal of a predetermined wavelength.
- Embodiments of the present invention have the following advantageous effects: they are capable of judging whether or not they conform to a wavelength assignment after calculating a route satisfying a routing constraint; instead of performing wavelength allocation at a time after calculating a plurality of routes, Improve the hit rate of available routes, reduce the information interaction between modules, and improve the stability of the system.
- the embodiment of the present invention when it is determined that the wavelength resource information in the link attribute information of each node on the route does not meet the predetermined constraint condition, the method may further determine Whether the wavelength conversion capability can satisfy the predetermined constraint.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Optical Communication System (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10813281.2A EP2461629B1 (en) | 2009-09-02 | 2010-05-27 | Route search and wavelength allocation method in an optical network and device thereof |
JP2012527185A JP2013504227A (ja) | 2009-09-02 | 2010-05-27 | 光ネットワークにおけるルートサーチと波長割当の方法及び装置 |
US13/393,645 US8977122B2 (en) | 2009-09-02 | 2010-05-27 | Route search and wavelength allocation method in optical network and device thereof |
KR1020127008475A KR20120057644A (ko) | 2009-09-02 | 2010-05-27 | 광 네트워크에서 루트 탐색과 파장 할당 방법 및 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910090675A CN101640817B (zh) | 2009-09-02 | 2009-09-02 | 一种光网络中寻找路由和波长分配的方法和装置 |
CN200910090675.9 | 2009-09-02 |
Publications (1)
Publication Number | Publication Date |
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WO2011026359A1 true WO2011026359A1 (zh) | 2011-03-10 |
Family
ID=41615558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/073315 WO2011026359A1 (zh) | 2009-09-02 | 2010-05-27 | 一种光网络中寻找路由和波长分配的方法和装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8977122B2 (zh) |
EP (1) | EP2461629B1 (zh) |
JP (1) | JP2013504227A (zh) |
KR (1) | KR20120057644A (zh) |
CN (1) | CN101640817B (zh) |
WO (1) | WO2011026359A1 (zh) |
Cited By (1)
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EP2702714A1 (en) * | 2011-04-29 | 2014-03-05 | Telcordia Technologies, Inc. | System and method for automated provisioning of services using single step routing and wavelength assignment algorithm in dwdm networks |
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CN101616085A (zh) * | 2009-06-25 | 2009-12-30 | 中兴通讯股份有限公司 | 一种约束路由生成方法和装置 |
CN101640817B (zh) * | 2009-09-02 | 2012-09-26 | 中兴通讯股份有限公司 | 一种光网络中寻找路由和波长分配的方法和装置 |
CN101834690B (zh) * | 2010-04-27 | 2014-03-12 | 中兴通讯股份有限公司 | 一种波长分配的计算方法及装置 |
WO2012000204A1 (zh) * | 2010-07-02 | 2012-01-05 | 中兴通讯股份有限公司 | 一种业务单板的分配方法和系统 |
CN101902406B (zh) * | 2010-08-12 | 2016-03-30 | 中兴通讯股份有限公司 | 一种计算路径的方法及装置 |
CN103370893B (zh) * | 2011-02-04 | 2017-03-08 | 瑞典爱立信有限公司 | 配置光路的方法、装置以及光通信网络节点 |
CN102316390B (zh) * | 2011-09-07 | 2018-03-02 | 中兴通讯股份有限公司 | 利用虚拟拓扑提高约束条件下路径计算效率的方法及装置 |
CN102638303B (zh) * | 2012-03-26 | 2015-06-10 | 中兴通讯股份有限公司 | Otu的配置方法及装置 |
BR112017004888A2 (pt) | 2014-09-11 | 2017-12-05 | Univ Arizona | sistema de comunicação óptica, e, método de reconfiguração de um trajeto de sinal. |
US9628172B2 (en) * | 2014-10-13 | 2017-04-18 | Ciena Corporation | Optimization of photonic services with colorless and directionless architecture |
US10050740B2 (en) * | 2015-06-02 | 2018-08-14 | Massachusetts Institute Of Technology | Scheduled light path switching in optical networks and automatic assessment of traffic impairments that would result from adding or deleting a channel in a wavelength-division multiplexed optical communication network |
CN105007223A (zh) * | 2015-07-16 | 2015-10-28 | 南京邮电大学 | 一种基于光层次架构的光网络动态多播路由波长分配方法 |
CN107181680B (zh) * | 2016-03-11 | 2020-11-03 | 中兴通讯股份有限公司 | 一种实现sdo功能的方法、系统及sdon系统 |
CN108199955B (zh) * | 2016-12-08 | 2021-11-12 | 中兴通讯股份有限公司 | 一种路由建立方法和装置 |
CN114125592A (zh) * | 2020-08-27 | 2022-03-01 | 中兴通讯股份有限公司 | 光传送网的路由计算方法、路由计算装置及存储介质 |
CN114866879A (zh) * | 2021-02-04 | 2022-08-05 | 中兴通讯股份有限公司 | Otn的重路由方法、设备及计算机可读存储介质 |
CN115550763A (zh) * | 2021-06-29 | 2022-12-30 | 华为技术有限公司 | 一种实现光路由的方法、装置和系统 |
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2009
- 2009-09-02 CN CN200910090675A patent/CN101640817B/zh active Active
-
2010
- 2010-05-27 WO PCT/CN2010/073315 patent/WO2011026359A1/zh active Application Filing
- 2010-05-27 EP EP10813281.2A patent/EP2461629B1/en active Active
- 2010-05-27 JP JP2012527185A patent/JP2013504227A/ja active Pending
- 2010-05-27 US US13/393,645 patent/US8977122B2/en active Active
- 2010-05-27 KR KR1020127008475A patent/KR20120057644A/ko not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
---|---|
KR20120057644A (ko) | 2012-06-05 |
CN101640817B (zh) | 2012-09-26 |
CN101640817A (zh) | 2010-02-03 |
US8977122B2 (en) | 2015-03-10 |
US20120163814A1 (en) | 2012-06-28 |
JP2013504227A (ja) | 2013-02-04 |
EP2461629A4 (en) | 2016-06-01 |
EP2461629A1 (en) | 2012-06-06 |
EP2461629B1 (en) | 2021-06-30 |
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