CN1384618A - Optical path establishing method for automatically exchanging optical network - Google Patents
Optical path establishing method for automatically exchanging optical network Download PDFInfo
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- CN1384618A CN1384618A CN02120885A CN02120885A CN1384618A CN 1384618 A CN1384618 A CN 1384618A CN 02120885 A CN02120885 A CN 02120885A CN 02120885 A CN02120885 A CN 02120885A CN 1384618 A CN1384618 A CN 1384618A
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Abstract
The present invention belongs to the field of optical communication technology. The method of establishing optical path includes sending out by the first client equipment node the request of establishing optical path; calculating the route in the optical cross-linking equipment node based on the request and transferring the request to the next client equipment node; checking optical resource state by the local network management system; sending out the establishment response by the second client equipment node after receiving the request and transmitting the inforamtion to the first client equipment node; and finishing the optical path establishment after the first client equipment node receives the resource distribution confirmation. Capable of establishing optical path fast in case of lacking of network resource, the method of the present invention is suitable for use in the next generation of autoamtic exchange optical network.
Description
Technical field
The present invention relates to the optical passage establishing method in a kind of ASON, belong to the optical communication technology field.
Background technology
ASON (hereinafter to be referred as ASON) is compared with traditional optical-fiber network, and its advantage is dynamically to distribute the wide resource of light belt flexibly according to the demand of business; Can realize network recovery and protection fast; Has stronger operability.It has represented the direction of development of optical network.
In the disclosed suggestion of International Telecommunications Union, given the definition of framework to the automatic foundation of light path, and provided basic process.Optical interconnection forum once proposed corresponding method for the foundation of light path, mainly was to adopt CR-LDP or RSVP-TE agreement to realize the dynamic management of optical channel.The foundation of optical channel comprises following process:
1, customer equipment node 1 is issued to the request that customer equipment node 2 is set up optical channel to coupled optical cross-connection equipment node 1.
2, optical cross-connection equipment node 1 calculates route according to the request of customer equipment node 1, and according to this route, the request of setting up optical channel is forwarded to customer equipment node 2 in proper order.The intermediate light Cross Connect equipment node that relates in the repeating process is after receiving above-mentioned request, by the local network management system its light resources situation is checked, comprise that the wavelength of priority level of above-mentioned request is whether idle or whether can seize, if resource is just used by the user of low precedence, then can seize.If resource situation can satisfy above-mentioned request of setting up optical channel, then ask the local network management system that this light resources input/output end port of optical wavelength and the optical cross-connection equipment node that takies thereof (be number) is labeled as and reserves for above-mentioned optical channel, can not continue to distribute to other and set up the optical channel request.
3, after customer equipment node 2 receives and agrees above-mentioned request of setting up optical channel, send and set up the optical channel response, and its retrograde order of transmitting according to solicited message is transmitted to customer equipment node 1.After each intermediate light Cross Connect equipment node receives this response, the light resources that is labeled as " reservation " state in the above-mentioned steps 2 is carried out resource allocation, establish the annexation that optical channel is set up required wavelength and port.After this process success, response message is transmitted to customer equipment node 1.
4, after customer equipment node 1 received above-mentioned response, optical channel was set up successfully.Customer equipment node 1 sends the affirmation information that optical channel is set up to intermediate light Cross Connect equipment node and customer equipment node 2 simultaneously.
Adopt said process to set up an optical channel automatically for optical-fiber network.But the allotment of the transmission of signaling message and processing and Internet resources is the process of a serial fully in this process, be that each node device all must guarantee under the local node resource allocation case of successful, information could be handed on, the speed of setting up of optical channel will reduce along with the expansion of network size like this.This obviously can not meet the requirement that ASON dynamically sets up optical channel.
Be problem settling time, existing tissue proposes a kind of typical parallel method, and each intermediate node transmits message back next node equipment earlier when setting up the optical channel request receiving, and then Resources allocation.Each node Resources allocation walks abreast like this, and the time of setting up optical channel is shortened greatly.But the method is not owing to carry out resource reservation, and in the Internet resources anxiety, the possibility that optical channel is set up failure increases severely, and can't guarantee that optical channel sets up fast.
Summary of the invention
The objective of the invention is to overcome the weak point that existing optical-fiber network is set up the optical channel agreement fast, optical passage establishing method in a kind of ASON is proposed, overcome serial approach optical channel long problem settling time in the prior art on the one hand, also overcome simultaneously the shortcoming of parallel method, when Internet resources are nervous, can set up optical channel apace.
Optical passage establishing method in the ASON that the present invention proposes comprises the steps:
1, customer equipment node 1 sends the request of setting up optical channel with customer equipment node 2 to coupled optical cross-connection equipment node.
2, optical cross-connection equipment node 1 calculates route according to the request of customer equipment node 1, and according to this route, the request of setting up optical channel is forwarded to customer equipment node 2 in proper order.Each the optical cross-connection equipment node that relates in the repeating process is after receiving above-mentioned request, carry out the inspection of light resources situation by its local network management system, set up request if the local resource situation can satisfy above-mentioned optical channel, then ask local network management that this light resources is marked as and reserve for above-mentioned optical channel.
3, after customer equipment node 2 receives and agrees above-mentioned request of setting up optical channel, send optical channel and set up response, and the retrograde sequence delivery that it is transmitted according to request message is to customer equipment node 1.
4, the optical cross-connection equipment node device 2 that links to each other with customer equipment node 2 is after sending optical channel foundation response, at once the light resources that is labeled as " reservation " state in the process 2 is carried out resource allocation behaviour, establish the annexation that optical channel is set up required wavelength and port.After this process success, the information of confirming Resources allocation is sent to a last node.
5, receive the resource allocation acknowledge message when customer equipment node 1, optical channel is set up successfully.Customer equipment node 1 sends optical channel foundation affirmation to optical cross-connection equipment node and customer equipment node 2 simultaneously, can carry out transfer of data.
Optical passage establishing method in the ASON that the present invention proposes, overcome the shortcoming of prior art, when Internet resources are nervous, can set up optical channel apace, therefore method of the present invention is applicable to the foundation of optical channel in the ASON of future generation fully.
Description of drawings
Fig. 1 is the comparison of optical channel settling time of the present invention and existing serial technology and desirable concurrent technique optical channel settling time.
Specific implementation method
Optical passage establishing method in the ASON that the present invention proposes at first sends the request of setting up optical channel with customer equipment node 2 by customer equipment node 1 to coupled optical cross-connection equipment node.Optical cross-connection equipment node 1 calculates route according to the request of customer equipment node 1, and according to this route, the request of setting up optical channel is forwarded to customer equipment node 2 in proper order, each the optical cross-connection equipment node that relates in the repeating process is after receiving above-mentioned request, carry out the inspection of light resources situation by its local network management system, comprise that the wavelength of priority level of above-mentioned request is whether idle or whether can seize the resource of just being used by the low precedence user, if satisfying above-mentioned optical channel, the local resource situation sets up request, then ask local network management that this light resources input/output end port of optical wavelength and the optical cross-connection equipment node that takies thereof (be number) is marked as and reserves for above-mentioned optical channel, can not continue to distribute to other optical channels and set up request.After customer equipment node 2 receives and agrees above-mentioned request of setting up optical channel, send optical channel and set up response, and the retrograde sequence delivery that it is transmitted according to request message is to customer equipment node 1.The optical cross-connection equipment node device 2 that links to each other with customer equipment node 2 is after sending optical channel foundation response, at once the light resources that is labeled as " reservation " state in the process 2 is carried out resource allocation behaviour, establish the annexation that optical channel is set up required wavelength and port.After this process success, the information of confirming Resources allocation is sent to a last node.When customer equipment node 1 receives the resource allocation acknowledge message, optical channel is set up successfully.Customer equipment node 1 sends optical channel and sets up the message of confirming simultaneously, and the optical cross-connection equipment node and customer equipment node 2 optical channels of the notice optical channel process of setting up have been set up success, can carry out transfer of data.
Setting up in the process of optical channel, the most time-consuming resource allocation step is parallel processing, the relation of its optical channel settling time and network node scale is as shown in Figure 1.As can see from Figure 1, for existing serial technology, optical cross-connection equipment node number is about 200ms of 5 channel establishment times in time; Optical cross-connection equipment node number is to be about 1100ms 50 channel establishment times in time.For typical parallel method, optical cross-connection equipment node number is 5 o'clock, and optical channel is about 75ms settling time; Optical cross-connection equipment node number is 50 o'clock, and optical channel is about 350ms settling time; Adopt the present invention, optical cross-connection equipment node number is 5 o'clock, optical channel about 80ms settling time; Optical cross-connection equipment node number is 50 o'clock, and optical channel is about 400ms settling time.As seen the time of the present invention is well below existing serial technology, and very nearly the same with typical parallel method.But because the present invention has considered the reservation of resource, so its robustness is far above typical parallel method, and particularly in the Internet resources anxiety, the present invention has optical channel and sets up the strong characteristics of success.
Claims (1)
1, the optical passage establishing method in a kind of ASON is characterized in that this method may further comprise the steps:
(1) customer equipment node 1 is issued to the optical channel request of setting up of customer equipment node 2 to coupled optical cross-connection equipment node 1;
(2) optical cross-connection equipment node 1 calculates route according to the request of customer equipment node 1, and according to this route, to set up the optical channel request and be forwarded to customer equipment node 2 in proper order, during forwarding, each intermediate light Cross Connect equipment node is after receiving above-mentioned request, by the local network management system it is carried out the inspection of light resources situation, set up request, then ask the local network management system that this light resources is marked as and reserve for above-mentioned optical channel if satisfy optical channel;
(3) after customer equipment node 2 receives and agrees above-mentioned request of setting up optical channel, send optical channel and set up response, and with its retrograde sequence delivery of transmitting according to solicited message to customer equipment node 1;
(4) the optical cross-connection equipment node that links to each other with customer equipment node 2 is after sending optical channel foundation response, at once the light resources that is labeled as " reservation " state in the process above-mentioned steps 2 is carried out resource allocation, establish optical channel and set up the annexation of required wavelength and port, and will confirm that the information of Resources allocation is sent to a node;
(5) customer equipment node 1 receives the resource allocation confirmation, and then optical channel is set up successfully.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021208859A CN1151615C (en) | 2002-06-07 | 2002-06-07 | Optical path establishing method for automatically exchanging optical network |
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| CNB021208859A CN1151615C (en) | 2002-06-07 | 2002-06-07 | Optical path establishing method for automatically exchanging optical network |
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| CN1151615C CN1151615C (en) | 2004-05-26 |
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Cited By (15)
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| WO2005011302A1 (en) * | 2003-07-31 | 2005-02-03 | Huawei Technologies Co., Ltd. | A method of transformation between permanent connection and switched connection in optical network |
| CN1305280C (en) * | 2004-09-17 | 2007-03-14 | 清华大学 | Establishing method for parallel layer light mark exchanging path in layer light network |
| WO2007059652A1 (en) * | 2005-11-25 | 2007-05-31 | Zte Corporation | Route selecting method of multicast service in automatically switched optical network |
| US7266295B2 (en) | 2003-04-17 | 2007-09-04 | Intel Corporation | Modular reconfigurable multi-server system and method for high-speed networking within photonic burst-switched network |
| US7272310B2 (en) | 2003-06-24 | 2007-09-18 | Intel Corporation | Generic multi-protocol label switching (GMPLS)-based label space architecture for optical switched networks |
| US7310480B2 (en) | 2003-06-18 | 2007-12-18 | Intel Corporation | Adaptive framework for closed-loop protocols over photonic burst switched networks |
| CN100372305C (en) * | 2005-07-28 | 2008-02-27 | 华为技术有限公司 | Service protective method |
| CN100375456C (en) * | 2004-11-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for realizing optical group broadcasting in intelligent optical network |
| CN100440810C (en) * | 2006-10-12 | 2008-12-03 | 中兴通讯股份有限公司 | A method to automatically obtain inner connection relation of optical network node |
| US7526202B2 (en) | 2003-05-19 | 2009-04-28 | Intel Corporation | Architecture and method for framing optical control and data bursts within optical transport unit structures in photonic burst-switched networks |
| CN1764323B (en) * | 2005-11-11 | 2010-04-14 | 中兴通讯股份有限公司 | Method for avoiding congenetic burst service resource collision in automatic switched optical network |
| US7734176B2 (en) | 2003-12-22 | 2010-06-08 | Intel Corporation | Hybrid optical burst switching with fixed time slot architecture |
| US7848649B2 (en) | 2003-02-28 | 2010-12-07 | Intel Corporation | Method and system to frame and format optical control and data bursts in WDM-based photonic burst switched networks |
| WO2012095046A3 (en) * | 2012-02-22 | 2013-01-24 | 华为技术有限公司 | Method, system and node device for monitoring performance of wavelength channel |
| US8660427B2 (en) | 2002-09-13 | 2014-02-25 | Intel Corporation | Method and apparatus of the architecture and operation of control processing unit in wavelenght-division-multiplexed photonic burst-switched networks |
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| CN101155098B (en) * | 2006-09-28 | 2011-01-05 | 华为技术有限公司 | Wireless Mesh and its resource management method |
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2002
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Cited By (19)
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| US8660427B2 (en) | 2002-09-13 | 2014-02-25 | Intel Corporation | Method and apparatus of the architecture and operation of control processing unit in wavelenght-division-multiplexed photonic burst-switched networks |
| US7848649B2 (en) | 2003-02-28 | 2010-12-07 | Intel Corporation | Method and system to frame and format optical control and data bursts in WDM-based photonic burst switched networks |
| US7266295B2 (en) | 2003-04-17 | 2007-09-04 | Intel Corporation | Modular reconfigurable multi-server system and method for high-speed networking within photonic burst-switched network |
| US7526202B2 (en) | 2003-05-19 | 2009-04-28 | Intel Corporation | Architecture and method for framing optical control and data bursts within optical transport unit structures in photonic burst-switched networks |
| US7310480B2 (en) | 2003-06-18 | 2007-12-18 | Intel Corporation | Adaptive framework for closed-loop protocols over photonic burst switched networks |
| US7272310B2 (en) | 2003-06-24 | 2007-09-18 | Intel Corporation | Generic multi-protocol label switching (GMPLS)-based label space architecture for optical switched networks |
| CN1574717B (en) * | 2003-06-24 | 2011-01-12 | 英特尔公司 | Gmpls based label space architecture |
| US8068483B2 (en) | 2003-07-31 | 2011-11-29 | Huawei Technologies Co., Ltd. | Method for migration between a permanent connection and a switched connection in a transmission network |
| WO2005011302A1 (en) * | 2003-07-31 | 2005-02-03 | Huawei Technologies Co., Ltd. | A method of transformation between permanent connection and switched connection in optical network |
| US7734176B2 (en) | 2003-12-22 | 2010-06-08 | Intel Corporation | Hybrid optical burst switching with fixed time slot architecture |
| CN1305280C (en) * | 2004-09-17 | 2007-03-14 | 清华大学 | Establishing method for parallel layer light mark exchanging path in layer light network |
| CN100375456C (en) * | 2004-11-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for realizing optical group broadcasting in intelligent optical network |
| CN100372305C (en) * | 2005-07-28 | 2008-02-27 | 华为技术有限公司 | Service protective method |
| CN1764323B (en) * | 2005-11-11 | 2010-04-14 | 中兴通讯股份有限公司 | Method for avoiding congenetic burst service resource collision in automatic switched optical network |
| WO2007059652A1 (en) * | 2005-11-25 | 2007-05-31 | Zte Corporation | Route selecting method of multicast service in automatically switched optical network |
| CN101243723B (en) * | 2005-11-25 | 2011-02-23 | 中兴通讯股份有限公司 | Route selecting method for automatic switching optical network multicast service |
| CN100440810C (en) * | 2006-10-12 | 2008-12-03 | 中兴通讯股份有限公司 | A method to automatically obtain inner connection relation of optical network node |
| WO2012095046A3 (en) * | 2012-02-22 | 2013-01-24 | 华为技术有限公司 | Method, system and node device for monitoring performance of wavelength channel |
| US9143263B2 (en) | 2012-02-22 | 2015-09-22 | Huawei Technologies Co., Ltd. | Method and system for monitoring performance of wavelength path, and node device |
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