CN1764320A - Controlling method for realizing automatic discovery of resource information based on automatic switched optical network - Google Patents

Abstract

The invention relates to a control method to automatic find resource information in ASON, special to local node and nearby node, which comprises: treating optical signal with optical loss monitor technique, realizing automatic find on control layer by multiprotocol label exchange technique. Wherein, controlling the cell of entity configuration binary guide sequence by checking local nodes by turns; broadcasting to detect information on control layer; determining the outlet and inlet potential resource according to fed configuration information of control entity on control layer; creating control channel according to link management protocol; realizing physical connection check between logical near nodes of a couple control entities. This invention needs not to obtain electric end, and can monitor layout error.

Description

Realize the automatic control method of finding of resource information based on ASON

Technical field

The present invention relates to a kind of in ASON, the realization to the automatic control method of finding of resource information, it specifically is a kind of control method that realization is found automatically to resource information based on the light loss monitoring technology, particularly a kind of the realization in optical transfer network changes the control method of finding automatically to the resource information between local node and the adjacent node, especially a kind of based on the light loss monitoring technology, on the optical channel layer of optical transfer network and optical multiplex layer, realize the control method that resource information is found automatically.

Background technology

For traditional optical-fiber network, all form between the network switching equipment and the network switching equipment and between the network switching equipment and the terminal use by webmaster or manual configuration, the renewal of the resource information bank that connection brought of the renewal of the network topology that adding brought of new node and new link also all is to form by webmaster or manual configuration, and such result is too much the expending and dispose the mistake of bringing accidentally of time normally.

And at ASON (Automatiically Switched Optical Network, ASON) the automatic discovery that proposes resource in the chain of command just can be resolved this problem fast and accurately, automatically discovery can realize making the network equipment that some network equipment or terminal use identification automatically is connected with oneself or terminal use's identity, and the while also can be found to be connected institute's loaded service type and number of resources between local node and these neighbor nodes.

ITU-T is G.7714 and G.7714.1, and pinpointing the problems automatically of ASON proposed the description of framework, finds by layer adjacency discovery, physical media adjacency discovery and controlled entity logic automatically in abutting connection with realizing; G.782 defined the hierarchy of optical transfer network (OTN), its concrete level is that optical channel (OCh), optical multiplex layer (OMS) and light transmit section layer (OTS).

Many equipment vendors in conjunction with the characterizing definition of the thought of above agreement and heterogeneous networks equipment be applicable to the multiple automatic discovery scheme of different layers network.

Different layer networks has different equipment, for OTN, has optical cross-connection equipment (OXC) and bifurcated multiplexing equipment (OADM) among the OCh, and these equipment can be directly carry out interconnection and road up and down to wavelength; Have OXC and OADM equipment among the OMS, these equipment can be directly carry out interconnection and road up and down to optical fiber; OTS has reclaim equiments such as image intensifer or repeater.

Fig. 1 has illustrated the automatic discovery relation between the equipment in each layer network, and wherein OChE is the equipment of optical channel, and OMSE is an optical multiplex layer equipment, and OTSE is that light transmits section layer equipment.As can see from Figure 1, only there is syntople in some equipment in the network in some higher levels, and non-conterminous at lower level.Layer adjacency discovery is exactly to find the syntople of the network equipment on certain layer.

ITU-T G.7714.1 in defined the dual mode of layer adjacency discovery: the discovery of interrupting service and the discovery of non-interrupting service.Fig. 2 has illustrated the mode of these two kinds of layer adjacency discoverys by the G.805 atom model of ITU-T.In Fig. 2, CP1 (Connection Point, CP; Tie point) and the interrupting service discovery procedure between the CP2 be that the network of this layer finds that by putting into message realizes in net load, if TCP1 (Termination Connection Point, TCP; Termintion connection point) and TCP2 terminate and find after these message adjacent one another are and MC (MatrixConnection, matrix connects) connects correctly, the syntople between CP1 and the CP2 just can be known by inference by the syntople between TCP1 and the TCP2 and obtained so; Non-interrupting service discovery procedure between CP1 and the CP2 is to find that by adding in the overhead byte of service layer message realizes, find after these message if TCP3 and TCP4 terminate adjacent one another are and make progress adaptive correct, the syntople between CP1 and the CP2 just can be known by inference by the syntople between TCP3 and the TCP4 and obtained so.

The layer adjacency discovery of three levels can realize by two kinds of above discovery modes among the OTN.The layer adjacency discovery of optical channel can be passed through at ODU (Optical channel Data Unit, ODU; Optical Channel Data Unit-k) carrying finds that message realizes in, also can find that message realizes by carrying in the overhead byte of optical multiplex layer.The layer adjacency discovery of optical multiplex layer and light transmit the layer adjacency discovery of section layer and also can use above two kinds of discovery modes to realize.

No matter realize a layer adjacency discovery on which layer of OTN, also no matter the layer adjacency discovery of each layer carried discovery message with which kind of mode, finds that message all needs to obtain electric termination.Below will introduce the layer adjacency discovery of optical channel OCh and optical multiplex layer OMS, and because there is not relevant switching equipment equipment in a light transmission section layer OTS, so the notion of intelligence exchange can not realize automatic having little significance of finding on this one deck.

As shown in Figure 3: the node among the ASON is formed by transmitting entity and controlled entity, transmits entity and is positioned at the transmission aspect, and controlled entity is positioned at the control aspect.The key-course torus network is become by the controlled entity and the control aspect link group of ASON node, and the transport layer torus network is become by the transmission entity and the aspect of the transmission link group of ASON node.The topology of key-course torus network can with transmit the topological consistent of aspect, also can be inconsistent, shown in the figure is inconsistent situation.Carry out interactive operation by special interface between controlled entity and the transmission entity.

An OCh switching equipment or an OMS switching equipment that possesses intelligent function mainly is made up of two parts, and a part is controlled entity (DA is acted on behalf of in discovery), and a part is for transmitting entity (wavelength switching matrix or optical fiber switching matrix), as shown in Figure 4.When a new node (OTN equipment) joins in Geju City network (OTN), just begun automatic discovery procedure between new node and the old network, node A is initiate node among Fig. 4, B is certain node in the old network, A joins in the network at B place and with B and links to each other on driving face, the controlled entity of A also inserts the key-course torus network (for example, the IP network among the figure) of the old network in B place simultaneously.

For A, automatically the final purpose of finding be exactly to find Node B and node A adjacent on transmission plane with A the outlet port how with the ingress port coupling (such as the outlet 4 of A and inlet 2 couplings of B) of Node B, but it at first need set up the logic syntople with B on chain of command, because being done the needed control messages of further discovery, the transmission plane link circuit resource just must rely on this syntople to carry out alternately, this logic syntople is that prior human configuration is good although some automatic discovery schemes that G.7714 reach some documents and proposed all are supposition, but this logic syntople can be found and dispose to Zhi Neng automatic discovery procedure automatically more, so the foundation of the logic syntople between the controlled entity of node A and Node B (also can be described as the foundation of control channel) is a pith of finding automatically.After A and B controlled entity logic syntople were set up, the discovery procedure of transmission plane link circuit resource just can have been carried out.Resulting resource information just was after A executed automatic discovery procedure: the node address of the control address of node A and B, node A and B (can select), outlet (A, 4) and the coupling of inlet (B, 2) and the coupling of outlet (A, 1) and inlet (B, 3).

For B, performed the same of its discovery procedure and A, the last resulting resource information of B is: the node address of the control address of Node B and A, Node B and A (can select), outlet (B, 2) with inlet (A, the coupling of coupling 4) and outlet (B, 3) and inlet (A, 1).

It should be noted that the control channel of being set up between node A and the Node B is two-way, if the automatic discovery procedure that Node B is initiated has realized the foundation of control channel between A and the B, when initiating automatic discovery procedure, node A just do not need to have set up this control channel more so.Port among Fig. 4 can be the fiber port of OMS layer, also can be the wavelength port of OCh layer.

For SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) equipment, the message of any transmission plane and data all can obtain the termination of electricity at equipment, and therefore, the adjacency discovery of SDH layer just can realize by transmitting the message with specific format at transmission plane.But, on some equipment of OTN, such as: (the Photonic CrossConnection equipment of the PXC in the All-Optical Communication Network, when full optical cross-connection equipment) carrying out the layer adjacency discovery of OCh and OMS, if adopt the discovery mode identical with SDH, so the adding that signal is carried out electricity termination function will increase to a certain extent these equipment complexity, reduce their Performance And Reliability and improve its expense.

Particularly, if in the OTN of full light, carry out the layer adjacency discovery of OCh, so only adding an electric termination block in PXC in order to carry out layer adjacency discovery will increase the complexity of network and the expense of equipment significantly, also can therefore reduce the port capacity of equipment simultaneously.Simultaneously, the light signal that the adding of electricity termination block will make some not need to be terminated obtains termination, energy loss will appear in the light signal of coming in like this, the performance of network also can be subjected to very big influence, MTBF (Mean Time Between Failures, mean time between failures) comprising equipment.In addition, the setting of electricity termination block also will take into full account the otherness of light signal, may support the transparent exchange of SDH or gigabit ethernet signal such as transparent switching equipment, also might support to carry the transparent exchange of whole wavelength of OC48 or OC768 signal, therefore electric termination block needs to be treated differently when these signals of termination, this will cause the raising of cost of equipment and complexity, and the signal kinds that switching equipment is supported is many more, and electric termination block will be complicated more.

Summary of the invention

The object of the present invention is to provide a kind of control method that realization is found automatically to resource information based on ASON.Method of the present invention does not need signal is carried out the electricity termination, is applicable to the OTN network of full light.

Design of the present invention is as follows:

G.7714 and the automatic discovery that relates to ASON G.7714.1 at first, ITU-T has provided the framework description, finds by layer adjacency discovery, physical media adjacency discovery and controlled entity logic in abutting connection with realizing automatically.

Secondly, G.782 defined the hierarchy of optical transfer network (OTN), its concrete level is that optical channel layer (OCh), optical multiplex layer (OMS) and light transmit section layer (OTS).

At last, for an OCh switching equipment that possesses intelligent function or OMS switching equipment mainly by controlled entity (DA is acted on behalf of in discovery), transmitting entity (wavelength switching matrix or optical fiber switching matrix) forms, when a new node (OTN equipment) joins in Geju City network (OTN), just begun automatic discovery procedure between new node and the old network: realizing promptly that new node joins in the network of old node place and with old node links to each other on transmission plane, and the controlled entity of new node also inserts the key-course torus network of the old network in old node place simultaneously.The first step of this process is that new node and old node are set up the logic syntople on chain of command, the transmission plane link circuit resource is done the needed control messages of further discovery just must rely on this syntople to carry out alternately.So the foundation of the logic syntople between the controlled entity of new node and old node (also can be described as the foundation of control channel) is the important process formerly that realizes automatic discovery procedure, after new node and the foundation of old node control entity logic syntople, the discovery procedure of transmission plane link circuit resource just can have been carried out.

Based on above-mentioned prior art, the present invention takes the processing of light loss monitoring technology (LOL) realization to light signal; Adopt GMPLS (Generaiized Multi-Protocol Lable Switch, the exchange of general multiple protocols label) technology to realize the automatic discovery feature of chain of command.

The present invention specifically is achieved in that

A kind of control method that realization is found automatically to resource information based on ASON comprises:

Establish the syntople between local node and the adjacent node controlled entity;

Realize control channel foundation by LMP Link Manager Protocol;

The physical connectivity check, link circuit resource of finishing link be in the coupling of both link ends and the foundation of link circuit resource table,

It is characterized in that in the described method, be used to obtain and the process of local node, specifically comprise following treatment step at adjacent node control plane address on the key-course torus network on the transport layer torus network:

First step:

The controlled entity of local node is provided with one by realizing the special-purpose chain of command multicast address of layer adjacency discovery, described chain of command multicast address is specifically designed to a cohort of automatic discovery communication by the IGMP agreement adding of key-course torus network when local node is linked into the control aspect;

The controlled entity of local node is provided with one and the corresponding binary system homing sequence of self unique control plane address, be used for finding the sign at transport layer torus network node ingress port that may link to each other with local node all outlet ports port middle outlet potential resource, constitute the outbound resource table

Second step:

The binary system homing sequence of sequence checking local node, code element is wherein read in circulation;

Code element as infructescence is " 1 ", and then local node belongs to the light signal that the outlet port that exports potential resource sends certain power, certain sending duration to all;

Code element as infructescence is " 0 ", and then local node belongs to the outlet port that exports potential resource to all and stops to send certain power, necessarily stops the light signal of sending duration;

Local node after all outlet ports port sends or stops to send light signal certain transmission or stop in the sending duration, immediately to key-course torus network multicast probe message, comprised a territory in the described multicast probe message, the position of the binary system homing sequence code element that the corresponding indication of the value order local node in described territory is read at this moment

Third step:

Code element and the corresponding thresholding of any one node of transport layer torus network by checking the binary system homing sequence in the multicast probe message obtained local node and belonged in the outlet port that exports potential resource whether send light signal at all this moment;

If " 1 " then show to have sent light signal, this node is by scanning the inlet potential resource that all also are not found the ingress port that links to each other with other node, and wherein all monitor the ingress port of light signal to record, forms first set;

If " 0 " then show not send light signal, this node is by scanning the ingress port that all belong to the potential resource that enters the mouth, and wherein all do not monitor the ingress port of light signal to record, forms second set,

The 4th step:

Any one node in the transport layer torus network is according to constantly receiving the multicast probe message that local node sends in proper order, and by constantly gathering the common factor processing of carrying out with described first set or second that obtains, form the corresponding first new set or second set, be used to obtain all ingress ports that whether might be connected with local node.

Describedly be used to obtain occur in the process of local node at adjacent node control plane address on the key-course torus network on the transport layer torus network:

Add network as new node;

Perhaps carry out linking to each other the first time between two newly added nodes;

Perhaps in the network between two disjunct nodes of script, because of increasing new link circuit resource;

Perhaps between two nodes that link to each other originally in the network, when having increased new link circuit resource.

The duration that sends described in second step or stop to send light signal is respectively greater than the life span of multicast probe message;

Described transmission or stop to send duration of light signal is according to the characteristic decision of local optical transmitting set.

The binary system homing sequence of local node described in second step is a pseudo random sequence, and it is 1 that the maximum occurrences in the territory that the code element figure place of binary system homing sequence and multicast probe message comprise differs.

The homing sequence of sequence checking binary system described in second step code element, after reading the last code element of binary system homing sequence, the value in the territory that the multicast probe message is comprised is 0 again, and local node restarts reading and the multicast of probe message in the key-course torus network of sequence checking binary system homing sequence code element with correspondence.

After the whole binary system homing sequence circulation of local node is read at least one time in second step, suspend certain duration, during this time, local node stops to belong to the outlet port transmission light signal that exports potential resource and stopping multicast message in the whole network to all;

After suspending the duration, local node restarts the circulation of binary system homing sequence code element and reads.

Described certain time-out duration is greater than or equal to zero.

In described the 4th step:

If through the set of handling of constantly occuring simultaneously is empty set, then get rid of the possibility that the node in the transport layer torus network has ingress port to link to each other with local node, this node will be ignored all multicast probe message that sended over after the local node.

In described the 4th step:

If through the set of handling of constantly occuring simultaneously be empty set, continue so to wait for to receive the multicast probe message that local node sended over, the set of final formation be this node might with the ingress port of local node connected node;

Node in the transport layer torus network is included in the probe message control plane address of local node in the key-course torus network and checks whether self has set up control channel with local node by obtaining, if do not have, to send configuration messages to local node, and the foundation that begins control channel according to the control plane address and the local node of local node, and local node continues all probe message of sending after ignoring.

The described local node that carries out the physical connection checkout procedure be determine and all outlet potential resources that the ingress port of the adjacent node of transport layer torus network links to each other on transmission or stop to send light signal;

The described adjacent node that carries out the transport layer torus network of physical connection checkout procedure is to determine that all inlet potential resources that ingress port may link to each other with the outlet port of local node carry out light loss monitoring scanning.

Effect of the present invention is: need not obtain the electricity termination at equipment; Avoided flase drop to test the generation of situation to a certain extent; Can monitor the distribution mistake in actual applications.The present invention is because set control channel boot process, all outlet ports or ingress port that local node and adjacent node are connected with each other have been determined, the feasible distribution fault monitoring that is carried out in actual applications, can only realize, compared with prior art have a significant effect by the physical connection checkout procedure.

Description of drawings

Fig. 1: OTN network middle level adjacency discovery relation.

Fig. 2: the dual mode of layer adjacency discovery.

Fig. 3: control aspect and transmission aspect concern schematic diagram.

Fig. 4: newly added node A links to each other with Node B by transmission plane.

The flow example of physical connection checkout procedure between Fig. 5: A and the B.

Fig. 6: the distribution mistake that two nodes link to each other and occurred.

Fig. 7: the flow chart of automatic discovery procedure of the present invention.

Embodiment

Be described in further detail below in conjunction with the flow process of accompanying drawing the method for the invention:

In the following description that relates to the inventive method, the discovery of wavelength one-level is corresponding to the adjacency of OCh layer among the OTN, and the discovery of optical fiber one-level is corresponding to the adjacency discovery of OMS layer.Automatically the formed link circuit resource table of layer adjacency discovery can be used to finish topology constructing and the resource allocation and the release function of this layer network, following emphasis is described the layer adjacency discovery of wavelength one-level, and the process and the wavelength one-level layer adjacency discovery process of the adjacency discovery of optical fiber one-level layer are similar.

The control method of automatic discovery of the present invention, on signal processing, adopted light loss monitoring technology (LOL), be implemented as follows: upstream one side of optical fiber or wavelength launches the light signal of certain power or does not launch any light signal in optical fiber or wavelength, monitor for the downstream, if downstream one side of optical fiber or wavelength has monitored light signal in optical fiber or wavelength and optical signal power has upwards surpassed certain thresholding, the downstream is set to 1 to the state of this root optical fiber or this wavelength so; If downstream one side does not monitor light signal in optical fiber or wavelength or optical signal power does not upwards surpass certain thresholding, the downstream is set to 0 to the state of this root optical fiber or this wavelength so.Like this, adjacent node can be inferred neighbouring relations between them by the variation of these states, and non-conterminous node can be got rid of neighbouring relations between them by the variation of these states.The realization of light loss monitoring technology requires node device to possess in all wavelengths outlet to launch the ability of certain power light signal simultaneously, and possesses the ability of carrying out the LOL monitoring simultaneously on all wavelengths inlet.If equipment does not possess above ability, can not be used for finishing corresponding discovery feature automatically, but present most equipment all possessed this function.

Automatically discovery feature is a key character of ASON, and its realization be unable to do without the effect of control aspect.The realization of control aspect has a variety of, comprising band inner control mode with based on the outer control mode of the band of GMPLS.The present invention does not relate to band inner control mode, and the present invention adopts the GMPLS technology to realize the function of chain of command aspect automatic discovery.It should be noted that the method is applicable to the situation in the routed domain, the situation the present invention between routed domain does not discuss.The module of finishing automatic discovery feature in the chain of command based on the GMPLS technology is called as finds agency (DA), and different layer networks can use different DA to carry out a layer adjacency discovery, and their DA is all arranged such as OCh and OMS.Certainly, the layer adjacency discovery of each layer network also can be finished by a DA, but should guarantee can not cause confusion between each layer adjacency discovery.

G.7714 standard the cardinal principle framework of automatic discovery, discovery procedure is mainly reflected in three aspects: the foundation of layer adjacency discovery, physical media adjacency discovery and controlled entity logic adjacency.The final purpose of finding is to find the attribute that sign and resource possessed of the newly-increased available resources of network, and particularly, the node of each layer network need be found following object by layer adjacency discovery process: (1) local node address; (2) distant-end node address; (3) local fiber sign; (4) distal fiber sign; (5) local wavelength sign; (6) far-end wavelength sign; (7) other attribute (as bandwidth and amount of capacity).For the layer adjacency discovery of wavelength one-level, (1) to (6) is the information that must go on record in the discovery procedure, and (7) are to select the information that writes down in the discovery procedure.The layer adjacency discovery of optical fiber one-level must the information of record (1) shown in (4) in discovery procedure, and the information shown in (5) and (6) needn't record, and (7) are to select the information that writes down.

According to framework G.7714, the present invention specifically is divided into three steps with this discovery procedure, and the node of each each layer network just can be found above mentioned various resource information by following three steps:

First step: the guiding of control channel.

Layer adjacency discovery need be established the logic syntople for the controlled entity of adjacent node, particularly, will establish the syntople between the adjacent node DA exactly, and the establishment of this relation can realize by set up a control channel between them.The LMP of IETF (Link ManagementProtocol, LMP Link Manager Protocol) is described the process of setting up of control channel, but prerequisite is the control plane address that adjacent node must obtain the other side each other, i.e. the address of the other side DA in chain of command.The guiding of control channel is exactly to be used for obtaining and the control plane address (DA address) of local node at the adjacent node of transmission plane OCh or OMS.Promptly be to be used for obtaining the control plane address (DA address) of newly added node in the present invention at the adjacent node of transmission plane OCh or OMS.

The guiding of control channel is carried out on one point and between the multiple spot.Initiate active one side who a bit is referred to as the control channel guiding of this process, the process of execution is called as ACTIVE CONTROL passage bootup process; The multiple spot that is triggered and carries out this bootup process is referred to as a passive side of control channel guiding, and the process of execution is called as Passive Control passage bootup process.

Second step: the foundation of control channel.

Be the concrete utilization to the control channel management process of mentioning among the LMP, as LMP was described, in this process, the control channel parameter obtained consulting, and control channel is set up.

Third step: physical connection check.

This process will be finished the physical connectivity check, link circuit resource of link in the coupling of both link ends and the foundation of link circuit resource table.In the adjacency discovery of OCh layer, the physical connection checkout procedure will be tested to the connectivity of wavelength, simultaneously the label of wavelength at local and far-end be mated, and match information is recorded in the link-local resource table; In the adjacency discovery of OMS layer, this process will be tested to the connectivity of optical fiber, simultaneously the label of optical fiber at local and far-end be mated, and match information is recorded in the link-local resource table.

The physical connection checkout procedure is carried out between two adjacent nodes of pair of control entity logic, the execution of this process also divides initiatively a side and a passive side, initiatively the process of side execution is called as initiatively physical connection check, and the process that a passive side carries out is called as passive physical connection check.

Node A with Fig. 3 and Fig. 4 is that example is described automatic discovery procedure of the present invention, in the present invention, controlled entity can be controlled the transmission entity and whether launch light signal in wavelength and optical fiber outlet port, transmit entity and can pass to controlled entity from the information that has or not in the light signal that ingress port monitored, each ASON node can also intercom and the relevant multiple message of automatic discovery mutually by controlled entity.Particular flow sheet is as shown in Figure 6: it should be noted that above just A at the performed automatic discovery procedure of B node, the B node also is to carry out automatic discovery procedure between itself and the A according to above flow chart.A and a plurality of neighbours' automatic discovery procedure can a shared ACTIVE CONTROL passage bootup process.Describe adjacent two nodes among the figure and when local resource changes, begin automatic discovery procedure.

Specifically, the automatic discovery procedure of resource information of the present invention, corresponding respectively following concrete situation:

The first, when new node adds network;

When linking to each other for the first time between the second, two newly added node (being equivalent to the initialization of network);

The 3rd, in the network between two disjunct old nodes of script, when increasing new link circuit resource;

The 4th, between the two Geju City nodes that link to each other originally in the network, when having increased new link circuit resource.

It needs to be noted, in the present invention, when the 4th kind of situation takes place, because of having determined to link to each other between two Geju City nodes, so can directly carry out the third step of physical connection check of the present invention.

It may be noted that in addition the time be, substantially all can show as the automatic discovery procedure that is taken place between the adjacent node of local node and transport layer torus network no matter above-mentioned that a kind of concrete situation takes place.

Below will describe the specific implementation of above-mentioned three steps in detail.

One, relates to the control channel guiding

Will set up control channel on chain of command with certain transmission plane adjacent node, need to obtain the control address of this adjacent node on chain of command, the control channel guiding will be obtained this control address exactly.The key-course torus network can be one and possess autonomous IP network, also can be other network of certain type, but this network should be able to be realized the function of multicast.ASON based on GMPLS adopts the IPv4 net as the key-course torus network more, and the control address that needs in the control channel bootup process so to obtain is exactly the IPv4 address of one 32 bit.If (Control Network adopts the IPv6 network, so the IPv6 address that is exactly 64 bits, the required IP address of using of control channel guiding.) control plane address considered during following explanation is the IPv4 address.

The present invention will use a kind of new message in this process of realization, this message transmits on the IP network of control aspect, the discovery message that the function class that it will be realized is mentioned in being similar to G.7714.1.This message is called as Probe message (probe message).This message carried a local chain of command IP address (DA address) that in the key-course torus network, has a uniqueness and with this IP address unique corresponding binary system homing sequence.Local chain of command IP address and homing sequence may all be distributed by webmaster and obtain.

1, the control channel bootup process is described:

As shown in Figure 4, it has provided an example that has new node to add but also do not find automatically, wherein node A is initiate, suppose that the port shown in the figure is a fiber port, at this moment node A links to each other with port 3 with the fiber port 2 of Node B with port one by fiber port 4, below be example with the adjacency discovery of OCh layer, specifically describe the control channel bootup process, wherein each node all has a DA relevant with OCh (DA that may also have other in the node), and the DA here links to each other by an independent IP network.

2, the newly added node A ACTIVE CONTROL passage bootup process of being carried out when adding a network is as follows:

2.1, node A joins ASON, node A links to each other on transmission plane with Node B, the DA of node A is linked into the key-course torus network simultaneously.The DA of node A is the controlled entity that node carries out the adjacency discovery of OCh layer, and it is responsible for the transmitting-receiving and the processing of control aspect message in the discovery procedure.The chain of command IP address that is had except itself, DA also possesses one by realizing the special-purpose chain of command multicast address DMA (Discovery Multicast Address) of OCh layer adjacency discovery, this address when node A is linked into chain of command just IGMP (Internet GrouDManagement Protocol, the Internet Group Management Protocol) agreement by IP network added a cohort that is specifically designed to automatic discovery communication.In addition, DA also possesses one and the corresponding homing sequence of self unique ip address, and different nodes has different homing sequences.The outlet of several optical fiber and wavelength is arranged among the OXC of A, the OCh layer adjacency discovery of A is exactly the sign that will find with these far-end adjacent node ingress ports of linking to each other of outlet port, and the result according to these discoveries sets up outbound resource table ELRT (Egress Link Resource Table), before layer adjacency discovery begins, in these link circuit resource tables without any record.For also not being found the outlet port that links to each other with other adjacent node, DA also can do corresponding record, these outlet ports are called as outlet potential resource PER (Potential Egress Resource), before layer adjacency discovery began, the record of these outlet potential resources had comprised all wavelengths outlet port among the OXC.

2.2, prepare beginning control channel bootup process.Newly added node A checks earlier local binary system homing sequence, is " 1 " as first bit symbols of infructescence, and then A sends the light signal of certain power to all optical fiber outlets (comprising wavelength all in the optical fiber) that belong to PER, and the time that this light signal continues is T _P1(each node is according to the self-defined T of the characteristic of local optical transmitting set _P1Size); First bit symbols as infructescence is " 0 ", and then A stops to send light signal, the time remaining T that this stops to send in the optical fiber outlet (comprising wavelength all in the optical fiber) that all belong to PER _P0(each node is according to the self-defined T of the characteristic of local optical transmitting set _P0Size); A in these optical fiber outlet emission or after stopping to launch light signal immediately to the whole network multicast Probe message, T here _P1And T _P0Size should take into full account the maximum delay that multicast message may occur, i.e. T _P1And T _P0Should can make T in the time of concrete the setting greater than this maximum delay _P1And T _P0All greater than the life span of Probe message.Comprised an Index territory in the Probe message, its value has been indicated the element position of the homing sequence that A read this moment.The code element that has just begun to check is first of homing sequence, so this thresholding is 0.

2.3, A is at the check of finishing first bit symbols and lasting T _P1Or T _P0After begin to check second bit symbols of homing sequence, determine in ensuing time T according to the value of code element then _P1Or T _P0In be to belong to optical fiber outlet emission light signal of PER or stop to launch light signal at all.In case determine emission or stop to launch light signal also, it is 1 Probe message that A begins Index value of multicast.By that analogy, A constantly changes the light emission state of all optical fiber that belongs to PER outlets, and the continuous multicast Probe message relevant with this state, and the Index value in the while Probe message also constantly adds 1 and increases progressively.Suppose that the pseudo random sequence that constitutes the binary system homing sequence has N _PThe position, the maximum of Index is N _P-1, when top process has been crossed time nT _P1+ mT _P0(n+m=N wherein _P) after, Index comes back to 0, and A restarts the chain of command multicast of reading of homing sequence code element and Probe message.

2.4 if A receives the Config message (seeing LMP) that certain node sends in this control channel bootup process, then illustrate A therewith node on transmission plane, have outlet optical fiber to link to each other, at this moment, A and this node begin the process of setting up of control channel.After control channel was set up process and finished, node came back in the control channel bootup process.Control channel between A and the B is arranged in the IP network coupling part of Fig. 4.

2.5, A to whole homing sequence circulation read C _P(C _P〉=1) suspend the control channel bootup process all over the back, this suspends the duration is T _S(being greater than or equal to zero).At this T _SIn, A stops to send light signal and stopping multicast Probe message in net to all optical fiber.After time TS, A restarts new control channel bootup process once.

3, the Node B Passive Control passage bootup process of being carried out when node A joins network is as follows:

3.1, because Node B also join the cohort that multicast address is DMA, so Node B can be received the Probe message that node A sends.B understands A this moment and whether launched light signal in all belongs to the wavelength outlet of PER by checking homing sequence in the Probe message and corresponding Index value, if " 1 ", then show and launched light signal, all also are not found the ingress port PIR (Potential IngressResource) that links to each other with other node to Node B by the scanning of LOL mechanism, wherein all monitor the optical fiber and the wavelength inlet of light signal to record, form set F _A ⁰If " 0 " then show and do not launch light signal, all belong to the ingress port of PIR to B by the scanning of LOL mechanism, and wherein all do not monitor the optical fiber and the wavelength inlet of light signal to record, form set F _A ⁰

3.2, Node B receives second the Probe message that node A sends, and forms F according to the description in the previous step then _A ¹, and pass through $F_A^1=F_A^1\∩F_A^0$ Obtain new F _A ¹Node B constantly obtains Probe message like this, passes through expression formula then $F_A^n=F_A^n\∩F_A^{n-1}(1\≤n\≤N_P-1)$ The optical fiber and the wavelength that obtain to be connected with A enter the mouth.If F _A ⁿBe empty set, then get rid of the possibility that B has inlet optical fiber to link to each other with A, B will ignore all Probe message that A is sended over later in this control channel bootup process; If F _A ⁿBe not empty set, continue so to wait for to receive the Probe message that A sent, receive N up to B _PTill the individual Probe message, at this moment, the formed set of B F _A ^NP-1In all elements just represented all optical fiber that link to each other with A and wavelength inlet among its OXC, as shown in Figure 4, F _A ^NP-1In comprised inlet fiber port 2 and 3.

If 3.3 the last set F that forms _A ^NP-1Be not empty set, B will check whether self has set up control channel with A so, if do not have then the process of setting up that begins control channel according to chain of command IP address and the A of A; If set up control channel then got back to the control channel bootup process.After this B will ignore all Probe message that A is sended in this control channel bootup process.Control channel between A and the B is arranged in the IP network coupling part of Fig. 4.

4, the control channel bootup process of OMS layer adjacency discovery

Control channel bootup process in the adjacency discovery of OMS layer and the control channel bootup process of above-mentioned OCh are similar, difference is: the node that (1) carries out Passive Control passage bootup process only needs " optical fiber " port is scanned when scanning belongs to the port of PIR, need not each " wavelength " carried out the LOL monitoring set F _A ⁿThe element that is write down also is " optical fiber " information but not " wavelength " information; (2) node that carries out ACTIVE CONTROL passage bootup process is not necessarily launched light signal on each in optical fiber " wavelength " when all belong to the fiber port transmission light signal of PER, can only launch light signal on the part wavelength or only in the light pilot signal; (3) the employed DA multicast address of OMS layer adjacency discovery DMA may be inconsistent with the employed DMA of OCh layer adjacency discovery, is for some node that only possesses OMS equipment can not received and the relevant control information of OCh layer adjacency discovery like this; (4) DA of the DA of OMS and OCh can be identical, also can be inequality, but they to separately the layer adjacency discovery processing must finish by two different processes because chain of command DA framework exists UDP(UserDatagram Protoco10, User Datagram Protocol) goes up operation (seeing the LMP suggestion), so can different layer adjacency discovery processes be distinguished by coming for unique udp port of each course allocation.

Two, the foundation of control channel

The foundation of control channel can realize with reference to the draft LMP of IETF.LMP has done detailed introduction to the management of control channel, and wherein the management of control channel comprises the negotiation and the protocol hello of Control Parameter.Below this process is done simple an introduction.

1, Control Parameter negotiations process

1.1, in order between two nodes, to activate a control channel, local node should send a Config message to distant-end node, as shown in Figure 4, Node B forms nonempty set F _A ^NP-1After begin to send this message to node A.Config message has comprised node Id, message Id and CONFIG object of local channel control Id, sending node.Might local node and distant-end node begin the process that primary parameter is consulted simultaneously, for example A among Fig. 4 and B send Config message to the other side simultaneously, so both sides' node situation that just may occur once competing.For fear of the logical miss that occurs because of this situation, the node with higher Node_Id will win competition this time, and like this, the node that Node_Id is lower must stop to send Config message and the Config message of receiving is given a response.If the Node_Id unanimity of both sides' node then indicate some nodes or configuration error has all appearred in two nodes, like this, node may continue to send Config message and obtains correcting (this modification generally needs the network operator to finish) up to the configuration of this mistake.

1.2, after distant-end node is received Config message, find it not with local node exist competitive relation or with the competition of local node in fail, it will give a response this Config message.Distant-end node checks the parameter that is comprised in the Config message, if some parameter is had objection then send a ConfigNack message to local node; If the parameter that comprises in the distant-end node acceptance message, it will send a ConfigAck message to local node so, begin the Hello process then.

1.3, local node receives beginning Hello process after the ConfigAck message.If local node is received ConfigNack message, it will be changed again or continue to keep parameter in the Config message so, and the Config message that will change or keep after being subjected to sends to distant-end node again, wait for that distant-end node carries out new negotiation, negotiation will repeat down always like this, till receiving the ConfigAck message that distant-end node is sent.

2, the protocol hello of control channel

2.1 local node sends a Hello message every some cycles to distant-end node, has comprised transmit Sequence Number TxSeqNum and receive sequence number RcvSeqNum in the Hello message.TxSeqNum is used for representing the serial number of the Hello message of the up-to-date transmission of this node, and it increases progressively gradually since 1, and it begins counting again after TxSeqNum reaches maximum.The serial number of the up-to-date Hello message that RcvSeqNum represents to receive that far-end is sent, this serial number are the TxSeqNum of this Hello message of copy and the result that obtains, and it is used for the subtend far-end and confirms that this Hello message is received.RcvSeqNum increases progressively gradually since 0, also restarts counting after it reaches maximum.

If 2.2 also do not receive the affirmation that the other side sends in the one-period of local node after sending Hello message, it will send one once more and have the Hello message of identical TxSeqNum to far-end with this Hello message, like this, Hello message will repeat to send till the dead cycle arrives or receives that far-end is sent an affirmation Hello message.

If 2.3 local node has been received the affirmation to first Hello message of local node that distant-end node is sent, control channel is announced to set up at local node one end so.Like this, local node one end just can utilize and set up good control channel and finish other process in the automatic discovery procedure.

The foundation of control channel has just realized that the controlled entity logic of layer adjacent node is adjacent, just can initiate the physical connection checkout procedure according to the adjacent controlled entity of these logics with posterior nodal point.If the layer adjacency discovery of the layer adjacency discovery of OCh and OMS controlled by different DA, the control channel set up of OCh layer adjacency discovery will be different from the control channel that the adjacency discovery of OMS layer set up so, with respect to same node, two control channels are also different in the local channel control sign (LOCAL_CC_ID) that this end had; Otherwise these two control channels logically are identical, and for same node, two passages are in the pairing LOCAL_CC_ID unanimity of this end.It should be noted that if the adjacency discovery of OCh layer is identical with the employed control channel of OMS layer adjacency discovery, finish control channel that the wherein foundation of the control channel of any one deck just means other one deck so and set up and also to finish.

Three, physical connection check

Set forth an additional physical connectivity checkout procedure among the LMP.Wherein mentioned and on wavelength, sent the physical connectivity that Test message is checked optical channel.The proposition of this process is based upon on the basis that node must possess a Test message termination block at least, as mentioning in the background technology, in All-Optical Communication Network, add electric termination block and will introduce many unfavorable factors, connect checkout procedure so IETF document draft-rbradfor-ccamp-lmp-lol has proposed a kind of novel physical by LOL mechanism.This process has only been mentioned the roughly process of physical connectivity check, has wherein also proposed some insoluble problems, comprises that the flase drop that is run into when testing simultaneously with a plurality of neighbours tests problem.

The present invention is because there is the execution of control channel bootup process, so the physical connection checkout procedure that draft-rbradfor-ccamp-lmp-lol proposes will be improved to a certain extent, this has just been avoided flase drop to test the generation of situation.Physical connection checkout procedure main body process used herein is all consistent with the process that draft-rbradfor-ccamp-lmp-lol proposes, unique difference is: in physical connection checkout procedure, carry out initiatively the node of physical connection checkout procedure and known in advance which outlet port this locality has to link to each other with the ingress port of distant-end node (carrying out the node of passive physical connection checkout procedure); And the node that carries out passive physical connection checkout procedure knows in advance also which ingress port this locality has to link to each other with the outlet port of distant-end node (carrying out the initiatively node of physical connection checkout procedure).So, carry out initiatively the node of physical connection checkout procedure and be not on all PER emission or stop to launch light signal, but on some specific PER, carry out; The node that carries out passive physical connection checkout procedure neither carry out LOL monitoring scanning to all PIR, but only some specific PIR is monitored.PER that these are specific and PIR obtain in the control channel bootup process, and it shows which outlet port (ingress port) local node passes through and link to each other with certain particular neighbor node.

1, the description of physical connection checkout procedure

The physical connection checkout procedure is mainly used to realize the concrete coupling between the port and the distribution mistake is checked (seeing 3.4), this process is by the method for mentioning among the draft-rbradfor-ccamp-lmp-lol, and by it is improved and revises it applied in the process that the present invention finds automatically.Be example still below, on the OCh physical examination process after this renewal done detailed introduction with node shown in Figure 4.The operation that A carries out is called as initiatively physical connection checkout procedure, and the operation that B carried out is called as passive physical connection checked operation.

The node A that active physical connection checkout procedure is carried out in preparation needs to check earlier whether the ingress port that self links to each other with distant-end node (adjacent node) determines that the definite of these ports finished by previous control channel bootup process.In case ingress port is determined, the outlet port corresponding with it also just known (in the monitoring to the distribution mistake, because the reason of engineering distribution, these outlets may be exactly the outlet port that A links to each other with B, the physical connection checkout procedure is used for checking this possibility exactly), like this, node A just can export port by these and carry out initiatively physical connection checkout procedure.Same Node B also will be determined the outlet that itself and node A may link to each other before beginning to carry out active physical connection checkout procedure.Be initiatively physical connection checkout procedure and passive physical connection checkout procedure of example explanation below with A.

1.1, node A prepares and Node B is carried out the physical connection checkout procedure, A will send a BeginVerify message to B and show and prepare to carry out the physical connection checkout procedure, if B does not determine the ingress port that it links to each other with A by A control channel bootup process this moment, then B sends the BeginVerifyNack message of an expression rejection to A, and A receives to wait for a period of time after this message and restarts to send BeginVerify message; If B has determined its ingress port that links to each other with A and has agreed the beginning checkout procedure by A control channel bootup process this moment, then sending a BeginVerifyAck message to A shows and can begin checkout procedure, at this moment, B prepares to begin to receive the Test message that A sends.Different with the situation of mentioning among the IETF document draft-rbradfor-ccamp-lmp-lol is, which outlet port is the control channel bootup process of A by Node B obtain may link to each other that (this helps node A the while to carry out active physical connection checkout procedure with a plurality of neighbours with Node B, 4 outlet ports and 1 outlet port as A among Fig. 4), B has obtained its optical fiber that links to each other with A in the control channel bootup process of A node and wavelength enters the mouth, and (this helps Node B to carry out passive physical connection checkout procedure with a plurality of neighbours simultaneously, 3 ingress ports and 2 ingress ports as B among Fig. 4), like this, A only needs to carry out luminous or stop luminous operation at those outlet ports that may link to each other with B, B also only need determine that the ingress port that links to each other with A carries out LOL scanning to those, and Node B is tested problem to the restriction of LOL sweep limits with regard to the flase drop of having avoided mentioning among the draft-rbradfor-ccamp-lmp-lol.

1.2, A receives that beginning sends Test message to B after the BeginVerifyAck message, but different with the Test message mentioned among the LMP be that this Test message is Test message outside the band that sends in control channel.Carried the test status LOL_TEST_STATUS of light signal in this VERIFY_ID that checks of sign and the current check in the Test message, the former comes from the BeginVerifyAck message that the B node sends, be used for B in other checkout procedure distinguish, which port the latter is used for identifying has been launched light signal, and which port is not launched light signal.Suppose that A determines to have 2 optical fiber outlets and links to each other with B, each optical fiber outlet has 4 wavelength outlets, so just can represent light signal emission mode in the checkout procedure with one group 2 * 4 checking sequence, always have 3 such as this group sequence, they are respectively 11110000,11001100 and 10101010, and each code element in each sequence is all represented a specific wavelength outlet luminance.If code element is " 1 ", illustrate that then A launches certain light signal on this wavelength port; If code element is " 0 ", illustrate that then A does not launch light signal on this wavelength port.The LOL_TEST_STATUS object identity of Test message each fiber port and the interface Id of wavelength port in A, simultaneously also according to above-mentioned checking sequence to the corresponding luminance of these port-marks.

1.3, B receives and checks message object LOL_TEST_STATUS after the Test message, sent light signal thereby obtain A on which port, which does not have, simultaneously, B also can obtain the interface Id of these ports.Optical fiber and wavelength that B begins to link to each other with A by scanning of home after receiving this message enter the mouth, and the result of scanning is put into TestStatusSuccess message.LOCAL_LINK_ID, local VERIFY_ID and the light signal test status LOL_TEST_STATUS that checks have been contained in the TestStatusSuccess message, identified the local fiber inlet that B links to each other with A and the interface Id of wavelength inlet among the LOL_TEST_STATUS, the while also monitors resulting result and has carried out identifying (whether monitoring light signal) carry out LOL at these inlets.

1.4, node A receives interface Id and the corresponding monitoring result of checking after the TestStatusSuccess message in the message, thereby obtain which monitors light signal in B and the ingress port that A links to each other, which does not monitor light signal, and last A may go out the B ingress port set W that one of interruption-forming may shine upon with it mutually with each wavelength that B links to each other at it _BAfter A is used for above-mentioned checking sequence to finish checkout procedure as light-emitting mode one by one, with respect to the W of each wavelength outlet _BIn just only can comprise an element, i.e. this wavelength outlet is mapped to the interface Id of the wavelength inlet behind the B.Like this, A just can form the link-local resource table that automatic discovery will produce in this locality.

1.5, A can not change the emission state of light signal on each port before receiving TestStatusSuccess message.When A has finished physical connection checkout procedure this time, A will send an EndVerify message to B, and B returns an EndVerifyAck message to A after receiving EndVerify message.

Fig. 5 is that example illustrates how this process is used for realizing the coupling between the port with two outlets among the node A, these two outlets be respectively wavelength port one in the optical fiber outlet 1 (F1, W1) and the wavelength port 2 in the optical fiber outlet 4 (F4, W2).

2, the physical connection checkout procedure of OMS

For the physical examination process of OMS, the main distinction of it and OCh respective process is: (1) is at OMS initiatively in the physical connection checkout procedure, be used for optical transmission mode checking sequence " 1; " " 0 " is not to represent whether launched light signal on certain " wavelength ", and be used for describing whether on certain " optical fiber ", launched light signal, emission light signal on the optical fiber can by only on the part wavelength of optical fiber or Optical Supervisory Channel the emission light signal realize; (2) in the passive physical connection checkout procedure of OMS, monitoring need not to carry out on " wavelength " at each to the LOL of light signal, only need get final product at every " optical fiber ", such as only check in the optical fiber subwave grow or Optical Supervisory Channel in have or not light signal.

Four, the monitoring of distribution mistake

Automatically it is to monitor the distribution mistake that a critical function of finding is used, what is the distribution mistake? as shown in Figure 6, each OXC or PXC have some to port, each comprises an outlet and an inlet to port, has a pair of port 4 as node A among the figure, comprising outlet 4 and inlet 4 (signs of 4 these ports of expression).Usually when carrying out network configuration, if the ingress port 2 of the outlet port 4 of node A and Node B links to each other, the outlet port 2 of Node B also should link to each other with the ingress port 4 of node A so, but the outlet port 2 of Node B has been connected to the ingress port 1 of node A among Fig. 6, mistake has just appearred in the distribution between node A and the Node B like this, and this does not allow to occur in the middle of engineering.But find automatically just can address this problem, because node A can obtain match condition between local breakout port and the Node B ingress port by the own automatic discovery procedure of being initiated, the match condition between the outlet port of its automatic discovery procedure acquisition local port port of also initiating by B and B simultaneously.A just can check whether this locality the distribution mistake occurred by the formed match information of this twice discovery like this, such as, inlet 2 couplings of local outlet 4 and B are found in the automatic discovery procedure that A initiates by A among Fig. 6, local outlet 1 and the inlet of B 3 couplings, but outlet 3 couplings of local inlet 4 and B are found in the discovery procedure that A initiates by B, local inlet 1 and the outlet of B 2 couplings, A just finds that the distribution mistake has appearred in this locality like this.Node B also can be found this distribution mistake.The method of this discovery distribution mistake has obtained introduction in G.7714.1, will specifically describe the monitoring of distribution mistake the present invention here.

G.7714.1, a kind of monitoring mode has been described, be that node A and Node B are initiated automatic discovery procedure separately separately, the automatic discovery procedure that node A initiates by self obtains the coupling between the ingress port of local breakout port and Node B, the coupling between this discovery procedure acquisition local port port that Node B is initiated by A and the outlet port of node A; The automatic discovery procedure that Node B is initiated by self obtains the coupling between the ingress port of local breakout port and node A, the coupling between this discovery procedure acquisition local port port that node A initiates by B and the outlet port of Node B.After all executing separately discovery procedure, these two nodes just can on each node, begin the monitoring of distribution mistake.

The monitoring of distribution mistake occurs in the physical connection checkout procedure among the present invention, if initiating initiatively, the node A of physical connection checkout procedure finds to exist in the previous outlet port of determining that may link to each other with B certain or certain port to can not get confirming (being these ports can not find coupling in B ingress port), then A thinks that the situation of distribution mistake may appear in this port or these ports, simultaneously, the Node B of carrying out passive physical connection checkout procedure also can be appreciated that the situation of this distribution mistake; Equally, when initiating active physical connection checkout procedure, Node B also can monitor the distribution mistake of this locality.Before the present invention, to the monitoring that the distribution mistake is carried out, must be after the link circuit resource table of adjacent both sides' node is set up, information in the link circuit resource table finishes by being included in alternately.The present invention need not to carry out after setting up the link circuit resource table, but can directly be finished the monitoring of distribution mistake by the physical connection checkout procedure.

Five, multicast is described

Layer adjacency discovery needs each node in the network can both receive Probe message, the DA that participates in layer adjacency discovery like this should possess a multicast address (DMA) so that self can receive these Probe message, and multicast address is an effective C class address between 224.0.0.255 and 239.255.255.255.

As shown in Figure 1, some node possesses OCh equipment and OMS equipment simultaneously in the network, and some node only possesses OMS equipment, so OCh should not send in the node that only possesses OMS equipment carrying out layer Probe message of adjacency discovery time institute multicast.So, adjacency discovery of OCh layer and the employed multicast address of OMS layer adjacency discovery should be inconsistent, like this, the node that possesses OCh equipment and OMS equipment simultaneously just has two multicast address, it can obtain the Probe message relevant with these two kinds of layer adjacency discoverys, and the node that only possesses OMS equipment only has a multicast address, and it is only to obtain the Probe message relevant with the adjacency discovery of OMS layer.

In addition, the multicast mode of using among the present invention also can otherwise replace, and broadcasts Probe message such as the chain of command IP network by the mechanism that floods.In not supporting the key-course torus network of multicast, this mode just can effectively be used, but this mode can make the traffic of chain of command increase, and causes the waste of some bandwidth.

Six, the application of homing sequence

The homing sequence information of carrying in the Probe message in the control channel bootup process can make this message recipient judge which node is adjacent with its chain of command, and which is non-conterminous.Will cause the erroneous judgement of node disconnected if sequence selection is improper, just might set up control channel between the non-conterminous node on the transmission plane originally like this, will cause the confusion of automatic discovery like this.

For each node select corresponding homing sequence must consider that the Cycle Length of sequence can not be lacked very much and per two sequences between correlation should be very little.Sequence too weak point may cause the disconnected situation of erroneous judgement, and certainly, sequence can not be oversize, otherwise can influence the time that the control channel bootup process is finished.The correlation of sequence also can increase node too greatly neighbours are carried out the probability of false judgment, so pseudo random sequence can reduce the wrong probability that occurs to a great extent as homing sequence.Such as the homing sequence that each node distributed in the network is different sequential elements from same group of Gold sequence, which type of or, also need determine by l-G simulation test repeatedly as for adopting sequence set (or sequence family) to serve as guiding from the different sequential elements of same group of GL sequence or DBCH sequence.

Claims (10)

1, a kind of control method that realization is found automatically to resource information based on ASON comprises:

Establish the syntople between local node and the adjacent node controlled entity;

Realize control channel foundation by LMP Link Manager Protocol;

The physical connectivity check, link circuit resource of finishing link be in the coupling of both link ends and the foundation of link circuit resource table,

It is characterized in that in the described method, be used to obtain and the process of local node, specifically comprise following treatment step at adjacent node control plane address on the key-course torus network on the transport layer torus network:

First step:

The controlled entity of local node is provided with one by realizing the special-purpose chain of command multicast address of layer adjacency discovery, described chain of command multicast address is specifically designed to a cohort of automatic discovery communication by the IGMP agreement adding of key-course torus network when local node is linked into the control aspect;

The controlled entity of local node is provided with one and the corresponding binary system homing sequence of self unique control plane address, be used for finding the sign at transport layer torus network node ingress port that may link to each other with local node all outlet ports port middle outlet potential resource, constitute the outbound resource table

Second step:

The binary system homing sequence of sequence checking local node, code element is wherein read in circulation;

Code element as infructescence is " 1 ", and then local node belongs to the light signal that the outlet port that exports potential resource sends certain power, certain sending duration to all;

Code element as infructescence is " 0 ", and then local node belongs to the outlet port that exports potential resource to all and stops to send certain power, necessarily stops the light signal of sending duration;

Local node after all outlet ports port sends or stops to send light signal certain transmission or stop in the sending duration, immediately to key-course torus network multicast probe message, comprised a territory in the described multicast probe message, the position of the binary system homing sequence code element that the corresponding indication of the value order local node in described territory is read at this moment

Third step:

Code element and the corresponding thresholding of any one node of transport layer torus network by checking the binary system homing sequence in the multicast probe message obtained local node and belonged in the outlet port that exports potential resource whether send light signal at all this moment;

If " 1 " then show to have sent light signal, this node is by scanning the inlet potential resource that all also are not found the ingress port that links to each other with other node, and wherein all monitor the ingress port of light signal to record, forms first set;

If " 0 " then show not send light signal, this node is by scanning the ingress port that all belong to the potential resource that enters the mouth, and wherein all do not monitor the ingress port of light signal to record, forms second set,

The 4th step:

Any one node in the transport layer torus network is according to constantly receiving the multicast probe message that local node sends in proper order, and by constantly gathering the common factor processing of carrying out with described first set or second that obtains, form the corresponding first new set or second set, be used to obtain all ingress ports that whether might be connected with local node.

2, realize control method that resource information is found automatically based on ASON according to claim 1, it is characterized in that describedly being used to obtain occur in the process of local node at adjacent node control plane address on the key-course torus network on the transport layer torus network:

Add network as new node;

Perhaps carry out linking to each other the first time between two newly added nodes;

Perhaps in the network between two disjunct nodes of script, because of increasing new link circuit resource;

Perhaps between two nodes that link to each other originally in the network, when having increased new link circuit resource.

3, realize control method that resource information is found automatically based on ASON according to claim 1, it is characterized in that sending described in second step or duration of stopping to send light signal respectively greater than the life span of multicast probe message;

Described transmission or stop to send duration of light signal is according to the characteristic decision of local optical transmitting set.

4, realize the automatic control method of finding of resource information based on ASON according to claim 1, the binary system homing sequence that it is characterized in that local node described in second step is a pseudo random sequence, and it is 1 that the maximum occurrences in the territory that the code element figure place of binary system homing sequence and multicast probe message comprise differs.

5, as described in claim 4, realize the automatic control method of finding of resource information be is characterized in that based on ASON:

The homing sequence of sequence checking binary system described in second step code element, after reading the last code element of binary system homing sequence, the value in the territory that the multicast probe message is comprised is 0 again, and local node restarts reading and the multicast of probe message in the key-course torus network of sequence checking binary system homing sequence code element with correspondence.

6, realize the automatic control method of finding of resource information be is characterized in that based on ASON according to claim 1:

After the whole binary system homing sequence circulation of local node is read at least one time in second step, suspend certain duration, during this time, local node stops to belong to the outlet port transmission light signal that exports potential resource and stopping multicast message in the whole network to all;

After suspending the duration, local node restarts the circulation of binary system homing sequence code element and reads.

7, as described in claim 6, realize the automatic control method of finding of resource information be is characterized in that based on ASON:

Described certain time-out duration is greater than or equal to zero.

8, realize the automatic control method of finding of resource information be is characterized in that in described the 4th step based on ASON according to claim 1:

If through the set of handling of constantly occuring simultaneously is empty set, then get rid of the possibility that the node in the transport layer torus network has ingress port to link to each other with local node, this node will be ignored all multicast probe message that sended over after the local node.

9, realize the automatic control method of finding of resource information be is characterized in that in described the 4th step based on ASON according to claim 1:

If through the set of handling of constantly occuring simultaneously be empty set, continue so to wait for to receive the multicast probe message that local node sended over, the set of final formation be this node might with the ingress port of local node connected node;

Node in the transport layer torus network is included in the probe message control plane address of local node in the key-course torus network and checks whether self has set up control channel with local node by obtaining, if do not have, to send configuration messages to local node, and the foundation that begins control channel according to the control plane address and the local node of local node, and local node continues all probe message of sending after ignoring.

10, realize it is characterized in that control method that resource information is found automatically based on ASON as arbitrary as described in the claim 1 to 9:

The described local node that carries out the physical connection checkout procedure be determine and all outlet potential resources that the ingress port of the adjacent node of transport layer torus network links to each other on transmission or stop to send light signal;

The described adjacent node that carries out the transport layer torus network of physical connection checkout procedure is to determine that all inlet potential resources that ingress port may link to each other with the outlet port of local node carry out light loss monitoring scanning.

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