CN101150878B - Parallel signaling method for realizing quick optical channel connection in intelligent optical network - Google Patents
Parallel signaling method for realizing quick optical channel connection in intelligent optical network Download PDFInfo
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- CN101150878B CN101150878B CN2007101200096A CN200710120009A CN101150878B CN 101150878 B CN101150878 B CN 101150878B CN 2007101200096 A CN2007101200096 A CN 2007101200096A CN 200710120009 A CN200710120009 A CN 200710120009A CN 101150878 B CN101150878 B CN 101150878B
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Abstract
The invention discloses a parallel signalling method for realzing light channel quick connection in the light passage. In the method, the middle nodes realize following steps in parallel: (1) sending an updated PATH message to the downstream node; (2) assigning the local inlet port wavelength resource, sending the RESV message which carries the resource assigning label; (3) driving the substrate hardware equipment rearrangment, receiving and keeping the local inlet port rearrangment; an aim node packs the state label to the RESV-F message, reversely sendes to the source node; a middle node brings the new resource obligate state, and transmites to the upriver mode through the RESV-F message; the source node returns the result to the user based on the resource obligate state to judge the connection is established whether or not. By using the invention, the cross connection establishing time delay is eliminated basically, the light passage connection establishing time is shortened effectively, the need of the intelligent light network band width provided by the distribution type application is satisfied.
Description
Technical field
The present invention relates to a kind of parallel signaling mechanism (PSBR that in optical-fiber network, realizes, ParallelSignaling Basedon RSVP-TE) method, relate in particular to a kind of towards general multiple protocols label exchange (GMPLS, Generalized Multiprotocol Label Switching) protocol architecture, can effectively shorten the parallel signaling method of optical channel connection set-up delay, belong to the optical communication technique field.
Background technology
The Internet that takes as the leading factor with the IP technology just can't satisfy the new demand in the data service of sharp increase.For this reason, people have turned one's attention to just in flourish optical-fiber network technology.At present, the optical-fiber network technology is widely adopted as a kind of new technical approach.
In the conventional optical network, photosphere only is counted as a simple transmission instrument that bandwidth service is provided.Along with the development of technology and the in-depth of understanding, people come to realise this way and have limited network extensibility.For this reason, people have proposed the technical concept of ASON (ASON).ASON is meant a kind of ASON that service can directly be provided as required with flexibility, enhanced scalability on photosphere.It increases one deck control plane on existing optical-fiber network, and utilizes this layer control plane to come to serve and bottom-layer network is controlled for the user connects, provides, and has characteristics such as high reliability, extensibility and high-efficiency.Why ASON is called as has " intelligence ", is that the foundation of optical channel and dismounting do not need artificial participation because it has adopted general multiple protocols label exchange (GMPLS) protocol architecture that aims at the connection oriented network exploitation as control protocol.
In ASON, be connected in order in each node, to set up with removing, need utilize resource reservation mechanism.Generally speaking, there is 2 kinds of resource reservation modes-forward direction to reserve and oppositely reserve.Oppositely reserve and different being that forward direction is reserved: from the source end through each node to the destination transmission be not obligate information, but collect the detection information of each link idle wavelength state.Destination arrives the back at detection information and determines the wavelength that needs are reserved according to the idle wavelength that detects, and sends obligate information Hui Yuanduan along same paths then, and node is carried out real reservation action on the way simultaneously.Therefore, the locking process of bandwidth is initiated by destination.Relevant studies show that, forward direction future mechanism have been reserved redundant resource too much in its reservation procedure, make other connection requests can't set up success, thereby have increased network blocking probability greatly.Then to the detection process awareness network resource situation of future mechanism by forward direction, multi-control channel bandwidth and long connection setup time are that cost effectively reduces the high blocking rate that the forward direction future mechanism is brought to take more.
The GMPLS protocol architecture provides technical foundation for ASON realizes the reliable assurance of bandwidth resources and distributed dynamic distribution.As the main signaling protocol of GMPLS, be a kind of typical backward signaling based on the RSVP (RSVP-TE) of traffic engineering.The connection establishment step of this RSVP-TE backward signaling mechanism is as follows:
1. produce a Path message by source node, this Path message is carried resource request information and is sent this Path message to downstream node according to explicit route object (ERO);
2. intermediate node is received Path message, for it sets up RSVP Path state, and judges whether local resource satisfies resource request.If local resource satisfies, node is revised the partial information (as ERO) in the Path message and is sent to downstream node;
3. destination node is received Path message, sets up the Path state.Asking if local resource satisfies, is to connect to distribute Export resource (along Path in the other direction), and generates the opposite direction transmission of Resv message along the Path message pathway.
4. after intermediate node was received Resv message, inquiry Path state was also set up RSVP Resv state for it, was to connect to distribute to enter the mouth and Export resource, drove the bottom connection and switched, and revised and upstream nodes transmission Resv message.
5. source node is received Resv message, sets up the Resv state, distributes the inlet resource for connecting, and finishes an establishment of connection.
RSVP-TE link setup time (T
Signaling) form by three parts: signaling is at the processing time of each Control Node (T
p), the transmission time (T of signaling on every link
t) and (T settling time of optical cross connect
c).In the traditional signaling message mechanism, connect the following formulate of time delay:
T
signaling＝2N×T
p+2(N-1)×T
t+N×T
c (1)
The signaling connection set-up delay directly influences the utilance and the service response speed of network.Need signaling mechanism more fast as the distributed application environment of current research focus for the demand of dynamic fast and flexible bandwidth.In existing RSVP-TE agreement, can reduce T by adopting the high data rate communication network
t, realize reducing T by Optimization Software structure and hardware
pBut for optical cross connect T settling time
c, along with the expansion of network topology scale, it increases the direct proportion that influences that connects time delay, will have a strong impact on the efficiency of transmission of network.
Summary of the invention
In view of the existing deficiency of existing signaling mechanism, the object of the present invention is to provide a kind of parallel signaling method that optical channel connects fast of in ASON, realizing.This method continued back to future mechanism at the premium properties aspect the network blocking probability, under the prerequisite that increases the control channel load hardly, can effectively reduce the signaling connection set-up delay, improve the resource utilization of overall optical network, for distributed application environment provides response bandwidth service more fast.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of optical channel parallel signaling method of connection fast of realizing in ASON is characterized in that comprising the steps:
A. source node sends the PATH message of having carried resource request information to destination node;
B. intermediate node is received described PATH message, sets up the PATH state and surveys the availability of local resource, and following three steps of Parallel Implementation: (1) sends the PATH message of renewal to downstream node; (2) distribute local inbound port wavelength resource, set up inbound port resource allocation status and upstream nodes and send the RESV message that carries the resource allocation label; (3) in Resources allocation, drive the bottom hardware device switching, receive and keep local inbound port switch status;
C. described destination node is handled described PATH message by the mode identical with described intermediate node, after receiving that bottom returns local node inbound port switch status, status indicator is encapsulated in the RESV that carries the resource reservation status identifier, via described PATH message oppositely send through each node in path to source node;
D. described intermediate node is received described RESV, at first inquire about the local resource reservation state, the resource reservation state and the local search result that carry according to described RESV produce new resource reservation status identifier, and it is transmitted by described RESV upstream nodes;
E. described source node is received described RESV, judges to connect whether set up success, the result is returned to the user according to the resource reservation state.
Wherein,
Among the described step b, after the upstream node of described intermediate node is received described RESV message, distribute local outbound port wavelength resource, drive the bottom hardware device switching, set up the outbound port resource allocation status, the outbound port switch status that returns according to bottom generates local resource reservation state sign simultaneously.
Among the described step c, the described RESV that carries the resource reservation status identifier is initiated by destination node, sends to source node along PATH message rightabout, and its route is determined by the explicit route object in the described PATH message.
Among the described step c, described generative process of carrying the RESV of resource reservation status identifier comprises the steps:
At first, intermediate node receives PATH information, sets up soft state, distributes local inbound port resource and keeps the inbound port switch status, sends RESV message then;
Described RESV message sends along the rightabout of described PATH message, and has carried label distribution information;
Judge whether the node that sends described RESV message is destination node;
If not, then continue to send PATH message by this node, if, generate the local resource reservation state, create and send the described RESV that carries the resource reservation status identifier.
In the described steps d, described processing procedure of carrying the RESV of resource reservation status identifier comprises the steps:
Intermediate node receives after the described RESV, sets up soft state, and identifier and the local resource reservation state identifier that carries according to the described RESV that receives created new logo simultaneously;
Described being designated very then keeps this state, otherwise the deletion soft state inquires whether this node is source node;
If source node then returns to connect and sets up the result, if not, then new logo is encapsulated into described RESV and further passes on to the previous stage node.
Parallel signaling mechanism implementation method provided by the present invention is by setting up the resource reservation status indicator at each node, can realize resource request on the node (PATH) and the parallel processing of reserving (RESV) message, combine with RSVP signaling mechanism soft state by the RESV (RESV-F) that carries the resource reservation identifier, receive that RSVP-F message only needs the simple sign position of judging, broken through the conventional serial limitation that interconnection in the method adds up settling time of playing drinking games, thereby eliminate the interconnection setup delay substantially, effectively shorten light path connection setup time, can fully satisfy the demand that Distributed Application provides the quick bandwidth of ASON.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the frame structure schematic diagram of the defined new type of messages-RESV-F of the present invention;
Fig. 2 is in the above-mentioned RESV-F message, the exemplary plot of RESV FLAG object;
Fig. 3 is the generative process flow chart of RESV-F message;
Fig. 4 is the process flowchart of RESV-F message;
Fig. 5 is the schematic flow sheet of distributed parallel signaling realizing method provided by the present invention.
Fig. 6 is the schematic flow sheet that intermediate node is realized the parallel signaling treatment mechanism.
Embodiment
At the existing defective of traditional signaling message, the present invention designs on the basis of traditional RSVP-TE signaling protocol has increased a kind of new type of messages type: the RESV (RESV-F) that carries the resource reservation status identifier, and propose and designed a kind of effective shortening label switched path (LSP, Label Switching Path) parallel signaling mechanism of connection setup time on this basis.The present invention had both kept the good blocking rate characteristic of reverse reservation by adopting a kind of novel signaling message that carries the resource reservation status identifier, can eliminate the influence of optical cross connect time to overall optical connection setup time characteristic again.
Referring to frame structure shown in Figure 1, RESV-F is that a kind of advertisement resource is reserved successfully/new type of messages of status of fail.It designs realization with reference to the Resv message in the existing RSVP-TE agreement, and its main improvements are to have increased resource reservation status identifier (RESV FLAG).Referring to RESV FLAG example shown in Figure 2, Flag wherein is used for carrying the sign position of downstream node reservation state, successfully is 1, and failure is 0; Reserved is that expansion is reserved in the future.
RESV-F message is initiated by destination node, sends to source node along PATH message rightabout, and its route is determined by the explicit route object in the PATH message (ERO, Explicit Route Object).
At first introduce the generative process and the processing procedure of RSVP-F message below.
Referring to shown in Figure 3, the generative process of RSVP-F message comprises the steps: that at first middle some nodes receive PATH information.This message has been carried information such as available resource information from the source node to the destination node and data traffic feature.PATH message is transmitted along explicit route (ERO) forward direction, and information hop-by-hop such as label request upgrades.Receive after the PATH information, set up the RSVP soft state that is used for management router and main frame reservation state.This soft state is also periodically heavily refreshed by PATH message and RESV message establishing.If in a clearance time interval, node does not receive that this state of heavy refresh message of coupling is with deleted.After soft state is set up, carry out local inbound port resource allocation and keep the inbound port switch status, send RESV message.This message sends along the rightabout of PATH message, and has carried label distribution information.Judge whether the node that sends RESV message is destination node.If not, then continue to send PATH message by this node; If, generate the local resource reservation state, create and send RSVP-F message.
The processing procedure of RSVP-F message as shown in Figure 4, the previous stage node (intermediate node) that comprises the steps: destination node receives after the RSVP-F message, foundation is used to manage the soft state of bottom optical cross connect reservation state, and identifier and the local resource reservation state identifier that carries according to the described RESV that receives created new logo simultaneously.Be designated very, then keep this state, otherwise the deletion soft state inquires whether this node is source node.If source node then returns user's connection and sets up result's (success or not), if not, then new logo is encapsulated in the described RESV, further pass on to the previous stage node.
Except RSVP-F message above-mentioned, PATH message and RESV message, distributed parallel signaling mechanism provided by the present invention also comprises other 4 class type of messages, is respectively PATHERR, RESVERR, PATHTEAR and ACK.In addition, can also use the Path among the RSVP-TE, message such as Resv.Below this 4 class message is carried out functional description:
Mistake when PATHERR:PATHERR message is used for reporting the PATH Message Processing.Its upstream nodes sends, and uses PATH state hop-by-hop route.PATHERR message is not revised any state, and it is only reported to the sender.
The mistake that takes place during RESVERR:RESVERR message report RESV Message Processing.It sends to downstream node, and uses RESV state hop-by-hop route.
PATHTEAR: in order to remove the link of having set up, initiate clearly, adopt the identical routing mode of its corresponding PATH message by the sender.When receiving PATHTEAR message, the RSVP state of knot removal coupling if there is not corresponding RSVP state, abandons PATHERR message, and does not transmit downstream.
ACK: receiving node is used for to the affirmation message of transmit leg transmission.
By combining of the soft state mechanism in this new type of messages of RESV-F and the RSVP-TE signaling, the present invention can fundamentally eliminate the influence of the time delay of the control of interconnection in the optical channel connection procedure to whole connect hours characteristic, has shortened connection setup time and has improved the utilance of network.Below in conjunction with parallel signaling mechanism realization flow shown in Figure 5 this is launched detailed explanation.
Parallel signaling mechanism provided by the present invention comprises following step:
1. at first, after source node is received the connection request message of OUNI (optical-fiber network User Network Interface), calculate the explicit route (ExplicitRoute) from the source node to the destination node according to routing table, send the PATH message of having carried resource request information to destination node according to explicit route object (ERO);
2. intermediate node handles PATH message.This step is one of core content of realizing among the present invention parallel signaling mechanism.Referring to parallel signaling shown in Figure 6 mechanism realization flow, intermediate node is set up the PATH state and is surveyed the availability of local resource after receiving upstream node PATH message, and the inlet resource of request is distributed.Then, following three steps of Parallel Implementation: (1) sends the PATH message of renewal to downstream node according to the ERO object in the PATH message; (2) distribute local inbound port (with the direction of transfer of PATH message for going into) wavelength resource, for this node is set up inbound port resource allocation status (RESV Ingress State) and upstream nodes sends the RESV message that carries the resource allocation label; (3) drive bottom hardware equipment such as light and intersect equipment OXC interconnection, receive and keep local inbound port switch status.
3. destination node is received PATH message, operates as intermediate node, and enters step 4;
4. after destination node is received the bottom return state, status indicator (State Flag) is encapsulated in the RESV-F message and via each node of PATH path oppositely sends to source node;
5. intermediate node is received RESV message, realize switching according to the local outbound port wavelength resource of the entrained label distribution of RESV message, driving bottom hardware equipment such as light intersection equipment, and set up outbound port resource allocation status (RESV Outgress State) for this node, the outbound port switch status that returns according to bottom generates local resource reservation state sign (State Flag) simultaneously;
6. intermediate node is received RESV-F message, at first inquire about local resource reservation state sign (State Flag), the resource allocation status and the local search result that carry according to RESV-F produce new resource reservation state, and it is transmitted by RESV-F message upstream node.In this step, only need simply with the sign in the RESV-F message that receives and local status indicator (StateFlag) with, as the result is true (1), the expression destination node is to resource allocation success between this node, otherwise, resource can't normal allocation, and this result is continued upstream nodes by RESV-F message transmit;
7. source node is received RESV-F message, judges to connect whether set up success according to the resource reservation state that is produced by step 6.Return to the user by the OUNI interface.
Parallel signaling mechanism by above step foundation, guaranteeing to shorten connection setup time effectively when reliability and validity are set up in connection, N in the traditional signaling message mode node number of process (expression connect) light doubly intersected to be decreased to settling time only needs such time, following formulate:
T
signaling＝2N×T
p+2(N-1)×T
t+T
c (2)
Above-mentioned improvement has meaning more in complex topology, and along with the increase advantage of node number on the link is reflected more clearly, thereby can improve network bandwidth utilance effectively.
More than parallel signaling method that optical channel in the realization ASON provided by the present invention is connected fast have been described in detail.For one of ordinary skill in the art, any conspicuous change of under the prerequisite that does not deviate from connotation of the present invention it being done all will constitute to infringement of patent right of the present invention, with corresponding legal responsibilities.
Claims (5)
1. in ASON, realize the parallel signaling method that optical channel connects fast for one kind, it is characterized in that comprising the steps:
A. source node sends the PATH message of having carried resource request information to destination node;
B. intermediate node is received described PATH message, sets up the PATH state and surveys the availability of local resource, and following three steps of Parallel Implementation: (1) sends the PATH message of renewal to downstream node; (2) distribute local inbound port wavelength resource, set up inbound port resource allocation status and upstream nodes and send the RESV message that carries the resource allocation label; (3) in Resources allocation, drive the bottom hardware device switching, receive and keep local inbound port switch status;
C. described destination node is handled described PATH message by the mode identical with described intermediate node, after receiving that bottom returns local node inbound port switch status, status indicator is encapsulated in the RESV that carries the resource reservation status identifier, via described PATH message oppositely send through each node in path to source node;
D. described intermediate node is received described RESV, at first inquire about the local resource reservation state, the resource reservation state and the local search result that carry according to described RESV produce new resource reservation status identifier, and it is transmitted by described RESV upstream nodes;
E. described source node is received described RESV, judges to connect whether set up success, the result is returned to the user according to the resource reservation state.
2. the optical channel parallel signaling method of connection fast of realizing in ASON as claimed in claim 1 is characterized in that:
Among the described step b, after the upstream node of described intermediate node is received described RESV message, distribute local outbound port wavelength resource, drive the bottom hardware device switching, set up the outbound port resource allocation status, the outbound port switch status that returns according to bottom generates local resource reservation state sign simultaneously.
3. the optical channel parallel signaling method of connection fast of realizing in ASON as claimed in claim 1 is characterized in that:
Among the described step c, the described RESV that carries the resource reservation status identifier is initiated by destination node, sends to source node along PATH message rightabout, and its route is determined by the explicit route object in the described PATH message.
4. as claim 1 or the 3 described optical channel parallel signaling methods of connection fast of in ASON, realizing, it is characterized in that:
Among the described step c, described generative process of carrying the RESV of resource reservation status identifier comprises the steps:
At first, intermediate node receives PATH information, sets up soft state, distributes local inbound port resource and keeps the inbound port switch status, sends RESV message then;
Described RESV message sends along the rightabout of described PATH message, and has carried label distribution information;
Judge whether the node that sends described RESV message is destination node;
If not, then continue to send PATH message by this node, if, generate the local resource reservation state, create and send the described RESV that carries the resource reservation status identifier.
5. as claim 1 or the 3 described optical channel parallel signaling methods of connection fast of in ASON, realizing, it is characterized in that:
In the described steps d, described processing procedure of carrying the RESV of resource reservation status identifier comprises the steps:
Intermediate node receives after the described RESV, sets up soft state, and identifier and the local resource reservation state identifier that carries according to the described RESV that receives created new logo simultaneously;
Described being designated very then keeps this state, otherwise the deletion soft state inquires whether this node is source node;
If source node then returns to connect and sets up the result, if not, then new logo is encapsulated into described RESV and further passes on to the previous stage node.
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| CN101521554B (en) * | 2009-03-27 | 2012-08-22 | 华为技术有限公司 | Loop circuit switching method, communication system and related equipment |
| CN102170391A (en) * | 2010-02-26 | 2011-08-31 | 中兴通讯股份有限公司 | Associated bidirectional label switched path creation method and system |
| CN102546375B (en) * | 2010-12-29 | 2016-08-03 | 中兴通讯股份有限公司 | A kind of show the method for host names of tunnel nodes, system and node |
| CN102611604B (en) * | 2011-01-19 | 2019-01-15 | 中兴通讯股份有限公司 | One kind sharing netted protection realization method and system |
| CN102170404B (en) * | 2011-06-02 | 2013-07-03 | 南京邮电大学 | Method for improving GMPLS/OBS network link utilization rate |
| CN102325045B (en) * | 2011-09-08 | 2017-07-18 | 中兴通讯股份有限公司 | It is a kind of to realize that control plane intersects the method and system switched |
| CN102348138B (en) * | 2011-11-10 | 2014-03-19 | 北京邮电大学 | Collision avoidance wavelength assignment method based on PCE (Personal Computer Equipment) |
| CN103036812B (en) * | 2012-12-20 | 2016-02-03 | 中国联合网络通信集团有限公司 | Wavelength resource reservation method and optical network node |
| CN106803814B (en) * | 2015-11-26 | 2021-01-22 | 中兴通讯股份有限公司 | Method, device and system for establishing flexible Ethernet path |
| CN114363184A (en) | 2018-05-31 | 2022-04-15 | 华为技术有限公司 | Method and device for adjusting bandwidth of transmission channel in flexible Ethernet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318911A (en) * | 2001-04-29 | 2001-10-24 | 北京邮电大学 | Realization method of optical network protection turning protocol |
| CN1395382A (en) * | 2002-07-26 | 2003-02-05 | 北京邮电大学 | Line protection reverse method in high-speed parallel optical transmission system |
-
2007
- 2007-08-06 CN CN2007101200096A patent/CN101150878B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1318911A (en) * | 2001-04-29 | 2001-10-24 | 北京邮电大学 | Realization method of optical network protection turning protocol |
| CN1395382A (en) * | 2002-07-26 | 2003-02-05 | 北京邮电大学 | Line protection reverse method in high-speed parallel optical transmission system |
Non-Patent Citations (1)
| Title |
|---|
| 黄照祥等.智能光网络中的光通道性能监测技术及其应用.现代有线传输.2005,59-62. * |
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