CN1300954C

CN1300954C - Two-way circuit protective inverting method

Info

Publication number: CN1300954C
Application number: CNB031542735A
Authority: CN
Inventors: 陈斌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2003-08-15
Filing date: 2003-08-15
Publication date: 2007-02-14
Anticipated expiration: 2023-08-15
Also published as: CN1581733A

Abstract

The present invention discloses a method for protecting a both-way line protection switching implementation part, which comprises the procedures that at least one STS channel in at least one section on a both-way line needs to create a (E-NUT) channel for no protection or dropping out protection or delete the E-NUT channel; E-NUT parameter table terms of corresponding nodes on the both-way line are configured, wherein the configured E-NUT parameter table term comprises a first mode and a second mode; when a ring switching occurs, if the ring switching of the STS channel in the E-NUT table term is prohibited or permitted, the channel is not protected by the ring switching, or is not protected; when section switching occurs, if the section switching of the STS channel in the E-NUT table term is prohibited or permitted, the channel is not protected by the section switching, or is not protected. The present invention can realize the partial protective function of the both-way line, and can bring flexibility for the configuration of users.

Description

Bidirectional line protection reverse method

Technical field

The present invention relates to the Synchronous Optical Network transmission in the communication system, relate in particular to the bidirectional line protection reverse method that a kind of transmission technology is used.

Background technology

In network service; when needs to the network equipment safeguard, when testing; when the impaired interruption of fibre circuit or interface break down; in order to make network communicating system unaffected; do not interrupt the transmission of proper network communication service; protection equipment need be set in network service, working equipment is protected.

It is a kind of important service protection mode of using in the Synchronous Optical Network transmission technology that the bidirectional line protection is switched; it finishes protocol action by the K byte in the line overhead; make originally to transfer to protect on the optical fiber and transmit, interrupt thereby make original business continue to transmit and be unlikely at the service signal that transmits on the impaired optical fiber.

Bidirectional line protection rotating loop is a fiber optic loop; on the ring the capacity of the light signal that can the carry speed grade that is referred to as this ring (represent with OC-N usually; N=12; 48; 192 etc.); the light path of OC-N can comprise the passage of N STS-1, and the STS-1 passage is the baseband signal in the Synchronous Optical Network, and speed is 51.840Mbit/s.The bidirectional line protection is switched and is divided into ring switching and span switching, section is that ring is gone up the light path between the adjacent node, for rank is the two fine rings of OC-N, and (1-N/2) STS passage of the optical fiber on each section is all encircled the STS passage (N/2-N) of going up the optical fiber on other sections and protects; For 4F Ring, all STS passages of every section optical fiber are all simultaneously by the STS path protection of the STS path protection of an other optical fiber on this section or last other section of ring.

In case configuration successful is switched in the protection of bidirectional line protection rotating loop; then whole bidirectional line protection rotating loop all can be used as protection; when the user only thinks on the guard ring STS passage of a section or several segments and other sections when not wishing to be protected; can't satisfy user's requirement; the user also can't dispose flexibly easily; the user can only have a selection; the fiber optic loop upper curtate all is protected; the fiber optic loop upper curtate is all not protected, and can't realize the part protection of fiber optic loop upper curtate.

Summary of the invention

In view of this, the objective of the invention is to overcome the deficiencies in the prior art, provide a kind of user can freely select some the STS passage on the protection bidirectional line ring, the bidirectional line protection reverse method that the protection of realization part is switched.

Bidirectional line protection reverse method provided by the invention, the step that comprises is:

Determine on the described bidirectional line that at least one synchronous driving signal (STS) passage of at least one section need be created as not protected or participation protective (E-NUT) passage or delete described E-NUT passage not, wherein, the described STS passage that is defined as the E-NUT passage can be service aisle or protection passage;

According to the described E-NUT passage that needs establishment or deletion, dispose the E-NUT parameter list item of respective nodes on the described bidirectional line, wherein, dispose described E-NUT parameter list item and comprise artificial mode and automatic mode.

Preferably, the step of the artificial mode of described configuration E-NUT parameter list item comprises:

When the described E-NUT passage of configuration, determine and to each node input parameter;

According to the parameter of described input, revise the E-NUT parameter list item that described need are configured to the STS passage respective nodes of E-NUT passage, finish all E-NUT parameter list items of respective nodes until configuration;

When the described E-NUT passage of deletion, determine and to each node input parameter;

According to the parameter of described input, revise the described E-NUT parameter list item that needs the STS passage respective nodes of deletion E-NUT passage, finish all E-NUT parameter list items of respective nodes until configuration.

Optionally, describedly determine and comprise to the step of each node input parameter:

Input needs plate number, light slogan, the STS channel number of configuration E-NUT parameter list item;

The described STS passage ring switching of input inhibit or permission node;

The described STS channel section of input inhibit or permission node is switched.

Preferably, when described need were configured to the E-NUT passage or need the STS passage of deletion E-NUT passage to be service aisle, the step of the automatic mode of described configuration E-NUT parameter list item comprised:

According to the work STS passage of definite section, dispose the E-NUT parameter list item of this end node of described work STS passage;

Information-bearing in the E-NUT parameter list item of this end node of configuration is sent to the opposite end adjacent node of described work STS passage in configuration message;

Described opposite end adjacent node upgrades its E-NUT parameter list item according to the configuration message that described end node sends;

After described opposite end adjacent node upgrades E-NUT parameter list item, send the answer response message of configuration message to described end node;

Judge whether a described in the given time end node receives the answer response message of described opposite end adjacent node, if receive, then this end node stops the transmission of configuration message;

If do not receive, then described end node retransmitted configuration message.

Optionally, the step of the E-NUT parameter list item of this end node of the described work STS of described configuration passage or the step of upgrading the E-NUT parameter list item of described opposite end adjacent node comprise:

When the described E-NUT passage of configuration, forbid the ring switching of described work STS passage; Judge that described bidirectional line ring is 4 fibre rings or 2 fine rings, if 4 fine rings are then forbidden the span switching of described work STS passage, if 2 fine rings are not then forbidden;

When the described E-NUT passage of deletion, allow the ring switching of described work STS passage; Judge that described bidirectional line ring is 4 fibre rings or 2 fine rings, if 4 fine rings then allow the span switching of described work STS passage, if 2 fine rings then do not allow.

Preferably, when described need were configured to the E-NUT passage or need the STS passage of deletion E-NUT passage to be the protection passage, the step of the automatic mode of described configuration E-NUT parameter list item comprised:

According to the protection STS passage of definite section, dispose the E-NUT parameter list item of this end node of described protection STS passage;

According to the state of E-NUT parameter list item of this end node of configuration, send the configuration message that carries described local terminal nodal information opposite end adjacent node to described protection STS passage;

Described opposite end adjacent node upgrades its E-NUT parameter list item according to the configuration message that described end node sends, and continues to transmit described configuration message other node to the described bidirectional line ring, gets back to this end node until described configuration message;

Judge that whether a described in the given time end node receives the configuration message that it sends, if receive, then stops the transmission of described configuration message;

If do not receive, described end node retransmitted described configuration message.

Optionally, the step of the E-NUT parameter list item of this end node of the described protection of described configuration STS passage comprises:

When the described E-NUT passage of configuration, judge that described bidirectional line ring is 2 fine rings or 4 fine rings,

If 2 fine rings forbid that then the above protects the ring switching of the corresponding work STS passage of passage with respect to this end node and the rightabout section of the section of the described E-NUT of being defined as passage;

If 4 fine rings, then forbid the span switching of work STS passage of the above protection passage correspondence of section of the described E-NUT of being defined as passage, forbid that simultaneously the above protects the ring switching of the corresponding work STS passage of passage with respect to this end node and the rightabout section of the section of the described E-NUT of being defined as passage;

When the described E-NUT passage of deletion, judge that described bidirectional line ring is 2 fine rings or 4 fine rings,

If 2 fibres encircle, then allow the ring switching of the work STS passage corresponding with respect to the above protection passage of this end node and the rightabout section of the section of the described E-NUT of being defined as passage;

If 4 fine rings; then allow the span switching of work STS passage of the above protection passage correspondence of section of the described E-NUT of being defined as passage, allow simultaneously that the above protects the ring switching of the corresponding work STS passage of passage with respect to this end node and the rightabout section of the section of the described E-NUT of being defined as passage.

Preferably, the E-NUT parameter list item of the described opposite end of described renewal adjacent node and transmit described configuration message step of other node to the bidirectional line ring and comprise:

When the described E-NUT passage of configuration:

If described configuration message is initiated the adjacent node of node and received message, forbid ring switching with respect to the work STS passage of receiving the described E-NUT of the being defined as passage correspondence on the message rightabout section; Judge that described bidirectional line ring is 4 fine rings or 2 fine rings, if 4 fine rings are then forbidden the span switching with respect to the work STS passage of receiving the described E-NUT of the being defined as passage correspondence on the message equidirectional section, if 2 fine rings are not then forbidden; After configuration finishes, continue to transmit described message next adjacent node to described opposite end adjacent node;

If other node of nonneighbor node is received message on the ring, the above is defined as the ring switching of the work STS passage of E-NUT passage correspondence to section to forbid disposing the east orientation of node of E-NUT table and west; After configuration finishes, continue to transmit described message next adjacent node to the node of described configuration E-NUT table;

If described configuration message is got back to this end node, stop the transmission of described configuration message;

When the described E-NUT passage of deletion:

If described configuration message is initiated the adjacent node of node and received message, allow ring switching with respect to the work STS passage of receiving the described E-NUT of the being defined as passage correspondence on the message rightabout section; Judge that described bidirectional line ring is 4 fine rings or 2 fine rings, if 4 fine rings then allow the span switching with respect to the work STS passage of receiving the described E-NUT of the being defined as passage correspondence on the message equidirectional section, if 2 fine rings then do not allow; After configuration finishes, continue to transmit described message next adjacent node to described opposite end adjacent node;

If other node of nonneighbor node is received message on the ring, the above is defined as the ring switching of the work STS passage of E-NUT passage correspondence to section for the east orientation of the node of permission configuration E-NUT table and west; After configuration finishes, continue to transmit described message next adjacent node to the node of described configuration E-NUT table;

If described configuration message is got back to this end node, stop the transmission of described configuration message.

Optionally, the artificial mode of described configuration E-NUT parameter list item and the automatic mode of described configuration E-NUT parameter list item can be changed mutually, and the step of described conversion comprises:

Need to determine this node of modification pattern,

The present mode of revising described definite this node configuration E-NUT parameter list item is another pattern;

Described node sends and carries the conversion message of mode switch information to adjacent node;

According to the conversion message that receives, described adjacent node is revised the pattern of configuration E-NUT parameter list item and is continued to transmit described conversion message to next adjacent node of described adjacent node, gets back to this node that sends the conversion message until described conversion message;

Judge that whether this node receives the described conversion message that it sends, if receive, then finishes the conversion of the configuration mode of E-NUT parameter list item; If do not receive, then wait for receiving.

Preferably, the configuration message that is used for transmitting the E-NUT channel information between described each node is a protocol data unit message, the conversion message that is used for transmitting the conversion of E-NUT table configuration mode on the ring between each node is a protocol data unit message, and described protocol data unit message is to transmit by the reserve bytes in data communication channel or the Synchronous Optical Network expense.

Optionally, described protocol data unit message as configuration message comprises following field: the STS channel number field: represent the STS channel number determined in the described message;

Counter field: the transmission counter of representing described message;

Request/response field: represent that described message is request message or response message; Work/protected field: represent that described message is that the configuration effort passage is for the E-NUT passage or the configuration protection passage is the E-NUT passage;

Establishment/deletion field: represent that described message is to create E-NUT passage or deletion E-NUT passage.

Preferably, described protocol data unit message as the conversion message comprises following field:

The node number field: expression sends this node number of described message;

Pattern field: represent that described message is that automatic generate pattern is transformed into artificial mode or artificial mode is transformed into automatic generate pattern.

Optionally, also comprise step, set up E-NUT parameter list association database; Preserve E-NUT parameter list item number according in database, wherein, the field of described database comprises:

Pattern field: expression artificial mode or automatic generate pattern;

Mode field: whether expression E-NUT table builds up sign;

The west is to encircling field: whether expression forbids that the west is to ring switching;

Western to the section field: whether expression forbids that the west is to span switching;

East orientation ring field: whether expression forbids the east orientation ring switching;

East orientation section field: whether expression forbids the east orientation span switching.

Preferably, also comprise step, forbid on direction of a STS passage in the recording configuration E-NUT parameter list item or allow switch status that the state of described record is encapsulated as class, and to call, wherein, the content of described class comprises when obtaining the E-NUT channel information:

Whether be configured to the E-NUT passage;

Send protocol data unit message behind the establishment E-NUT passage and whether respond sign;

Ring switching is to forbid or allow;

Span switching is to forbid or allow.

The exception of full bi-directional line protection reverse can be provided by the present invention; promptly provide the protection of part bidirectional line to switch; by making some STS passage not protected; perhaps some passage participation protective not; the protection of realization part bidirectional line is switched, thereby the chance of selection can be provided to the user.In other words, be the E-NUT passage by specifying some STS passage, the bidirectional line protection turning protocol that can cause encircling on some relevant STS passage lost efficacy, and had realized the function of the part protection of bidirectional line, for user's configuration has brought flexibility.

Description of drawings

Below in conjunction with the drawings and specific embodiments the present invention is further detailed.

Fig. 1 is the logical format schematic diagram of node E-NUT table on the bidirectional line protection rotating loop.

Fig. 2 is the bidirectional line protection rotating loop schematic diagram that 4 nodes are arranged.

Fig. 3 is that the STS channel arrangement of working on the bidirectional line protection rotating loop is the flow chart that each node generates the E-NUT table automatically behind the E-NUT passage.

Fig. 4 is the form schematic diagram that is used to transmit the protocol data unit message that disposes the E-NUT channel information.

Fig. 5 is the E-NUT table allocation plan that a certain service aisle of AB section is configured to E-NUT passage posterior nodal point A.

Fig. 6 is the E-NUT table allocation plan that a certain service aisle of AB section is configured to E-NUT passage posterior nodal point B.

Fig. 7 is that protection STS channel arrangement is the flow chart that each node generates the E-NUT table automatically behind the E-NUT passage on the bidirectional line protection rotating loop.

Fig. 8 is that a certain protection channel arrangement of AB section is the E-NUT table allocation plan of E-NUT passage posterior nodal point A.

Fig. 9 is that a certain protection channel arrangement of AB section is the E-NUT table allocation plan of E-NUT passage posterior nodal point B.

Figure 10 is that a certain protection channel arrangement of AB section is the E-NUT table allocation plan of E-NUT passage posterior nodal point C.

Figure 11 is that a certain protection channel arrangement of AB section is the E-NUT table allocation plan of E-NUT passage posterior nodal point D.

Figure 12 is the flow chart of artificial mode configuration E-NUT table.

Figure 13 is the flow chart that the artificial mode of configuration E-NUT table is converted to automatic mode.

Figure 14 is the flow chart that the automatic mode of configuration E-NUT table is converted to artificial mode.

Figure 15 is an E-NUT channel status migration schematic diagram.

Embodiment

Core of the present invention is the E-NUT technology; technical scheme of the present invention is based on the realization of E-NUT technology; wherein the E-NUT technology is a kind of like this technology: the STS passage on certain section is the E-NUT passage on the BLSR ring by specifying; if this STS passage is service aisle then can not get protection so, if this STS passage is the protection passage then can not be used for protecting other STS passage.In case certain the STS passage on the configuration ring is the E-NUT passage, ring is gone up all nodes and all should be safeguarded an E-NUT table so, and this table has illustrated whether the STS passage on this node East and West direction section has been subjected to the influence that ring is gone up configuration E-NUT passage.

For the clearer understanding the present invention of the technical staff who makes the technical field of the invention, now be described with reference to the accompanying drawings.

As shown in Figure 2, be example with the bidirectional line ring that 4 nodes are arranged, 4 nodes on this ring are respectively node A, Node B, node C, node D.The STS passage that the user can dispose the last section of ring is the E-NUT passage, and also can dispose and encircle many STS passages going up a plurality of sections is the E-NUT passage; The STS passage comprises work STS passage and protection STS passage again, can configuration effort STS passage be the E-NUT passage, can configuration protection STS passage be the E-NUT passage also.If show and adopt automatic generate pattern to dispose E-NUT in the concrete configuration process, then once determining a job on the section and protecting the STS passage is the E-NUT passage, and this passage is configured; If employing artificial mode configuration E-NUT shows then need not determine concrete section, but is configured item by item according to the content that E-NUT shows encircling each node.

Fig. 3 is that the STS channel arrangement of working on the BLSR protection rotating loop is the flow chart that each node generates the E-NUT table automatically behind the E-NUT passage.

Be that each node generates the E-NUT table automatically and is elaborated behind the E-NUT passage to encircling work STS channel arrangement now in conjunction with Fig. 2, Fig. 3.

In step 100, determine that it is the E-NUT passage that ring is gone up a certain work STS passage of AB section, be example with No. 1 work STS passage, and to send configuration effort STS passage be the E-NUT channel command, its command type is: CMD CONFIG WORK ENUT; Certainly, can determine that also certain work STS passage of BC, CD, DA section is the E-NUT passage on the BLSR protection rotating loop, also all sections on the whole BLSR protection rotating loop can be defined as the E-NUT passage.When the E-NUT of configuration node table, then be after determining that a section is the E-NUT passage, the E-NUT table of configuration respective nodes, and then determine next section, and dispose the E-NUT table of respective nodes again, all determine to finish until the E-NUT passage that will determine.

After operating personnel have determined that No. 1 work STS passage of the last AB section of ring is the E-NUT passage, to the input program order CMD CONFIG WORK ENUT of system, it is the E-NUT passage that this order is used for being provided with or deleting this work STS passage, this order is when carrying out, at first to judge, current is to create E-NUT passage or deletion E-NUT passage, and is that example describes to create the E-NUT passage, creates E-NUT passage process and specifically comprises following step.

In step 110, creating the AB section is the E-NUT passage, then when initial ring is switched, forbids encircling the work STS passage ring switching of AB section, promptly forbids No. 1 work of AB section STS passage ring switching in the E-NUT of node A table;

In step 120, for 4 fine rings, when span switching takes place, need forbid that also No. 1 STS channel section of working encircling the AB section switches, therefore to judge that BLSR protection rotating loop is 4 fine rings or 2 fine rings, if 4 fine rings, to forbid that then No. 1 STS channel section of working encircling the AB section switches, promptly execution in step 130, if 2 fine rings, then do not need to forbid span switching, i.e. execution in step 140 is finished in the E-NUT of node A table configuration;

In step 130, if 4 fine rings, forbid that the work STS channel section of encircling the AB section switches;

In order to be illustrated more clearly in the E-NUT table configuring condition of node A, specifically described with reference to Fig. 5, as shown in Figure 5, after the expression configuration ring of " being under an embargo " is gone up No. 1 work of AB section STS passage and is the E-NUT passage, if the bidirectional line ring is 2 fine rings, node A is under an embargo to ring switching in the west on No. 1 passage; If be 4 fine rings, node A is under an embargo to ring switching and span switching in the west on No. 1 passage simultaneously.

Again be that each node generates the E-NUT table automatically and is elaborated behind the E-NUT passage with reference to Fig. 3 to encircling a certain work STS channel arrangement.

In step 140, after the configuration of the E-NUT of node A table finishes, send the configuration message of the E-NUT table information that carries node A to Node B by node A.Configuration message response sign,, is put the configuration message response and is masked as not response when building work STS passage is the E-NUT passage for responding in initial mark; A timer is set, is used to monitor the configuration message that node A sends when service aisle is the E-NUT passage and whether arrives adjacent node B, if configuration message arrives adjacent node, then adjacent node B replys response message; Node A will retransmit previous configuration message otherwise timer exceeds schedule time.

Judge whether timer starts, if start, then timing begins, if be not activated, then start timer and picks up counting;

In order to set forth type and the feature that node A sends to the configuration message of Node B better, specify below with reference to Fig. 4.

Wherein,

STS channel number (STS channel number) field: specified STS channel number in the expression configuration message, be divided into and joined 10 bits (BIT), for OC192 rank BLSR ring, can only need to use 8 BIT in front, back 2 BIT keep; And, can use 10 BIT for other BLSR ring of OC768 level.

Counter (Counter) field: the transmission counter of expression configuration message accounts for 4 BIT;

Request (Req/Rsp) field: the expression configuration message is request message or response message, if request message, Req/Rsp=0 then is if response message, then Req/Rsp=1;

Work/protection (W/P) field: the expression configuration message be the configuration effort passage for the E-NUT passage or the configuration protection passage is the E-NUT passage, if service aisle, W/P=0 then is if protection passage, then W/P=1;

Establishment/deletion (Ent/Dlt) field: the expression configuration message is to create E-NUT passage or deletion E-NUT passage, if create, Ent/Dlt=0 then is if deletion, then Ent/Dlt=1.

The type of the configuration message that node A sends is: PDU WORK REQ, field W/P=0 in the message wherein, field Req/Rsp=0.

The configuration message that is sent by node A on the BLSR ring need transmit by the reserve bytes in data communication channel (DDC) or the sonet overhead to other respective nodes.

In step 150, after Node B is received the configuration message of node A transmission, begin to dispose the E-NUT table of oneself, Node B is forbidden the ring switching of the STS passage of AB direction in its E-NUT table.When initial ring was switched, Node B was forbidden the ring switching of AB section work STS passage according to the configuration message that node A sends;

In step 160; for 4 fine rings, when span switching takes place, need forbid that also the work STS channel section of encircling the AB section switches; therefore to judge that BLSR protection rotating loop is 4 fine rings or 2 fine rings; if 4 fine rings, to forbid that then the work STS channel section of encircling the AB section switches, promptly execution in step 170; if 2 fine rings; then do not need to forbid span switching, i.e. execution in step 180 is finished in the E-NUT of Node B table configuration:

In step 170, be 4 fine rings, forbid that AB section work STS channel section switches,

In step 180, after the E-NUT of Node B table configuration finishes, the configuration message that node A sends is made the answer response message, so that make node A know that Node B received the configuration message that node A sends, and disposed the E-NUT that finishes oneself and shown;

In order to be illustrated more clearly in the E-NUT table configuring condition of Node B, specifically described with reference to Fig. 6, as shown in Figure 6, after the expression configuration ring of " being under an embargo " is gone up No. 1 work of AB section STS passage and is the E-NUT passage, if the bidirectional line ring is 2 fine rings, Node B east orientation ring switching on No. 1 passage is under an embargo; If be 4 fine rings, Node B east orientation ring switching and span switching on No. 1 passage are under an embargo simultaneously.

In step 190, whether decision node B sends the answer response message to node A, if send, showing that Node B has disposed finishes E-NUT table, and the continuation that should stop configuration message sends, and then execution in step 210, if do not send, to see then whether the timer of setting is overtime, promptly execution in step 200;

In step 200, judge whether the timer that is provided with exceeds schedule time, and overtime if timer does not have, then execution in step 190, continue wait node B and send the answer response message; If timer is overtime, then execution in step 140, and node A retransmits configuration message to Node B, if retransmit 3 times, and report and alarm then.

Wherein, the timer expiry incident is: TIMER EXPIRE.Arrive when the timer stipulated time, node A does not also receive the answer response message of Node B, will trigger timer expiry incident: TIMEREXPIRE, and node A retransmits the previous configuration message that sends to Node B.

In step 210, node A receives the answer response message from Node B, puts the configuration message response and is masked as the transmission that responds and stop configuration message;

Wherein, Node B to the type of the answer response message that node A sends is: PDU WORK RSP, and the field that comprises in this message is: Work/Prot=0; Req/Rsp=1.After node A receives the answer response message that Node B sends, show that the E-NUT channel arrangement finishes, node A stops going up other nodes to ring and sends configuration messages.

In step 220, work STS channel arrangement is that each node generates the E-NUT end of list (EOL) automatically behind the E-NUT passage on the ring.

Being that ring is gone up the process that each node generates the E-NUT table automatically and had been described in detail behind the E-NUT passage to a certain protection STS channel arrangement on the bidirectional line ring above, is that the process that each node generates the E-NUT table automatically behind the E-NUT passage is described in detail below in conjunction with Fig. 2, Fig. 7 to a certain protection STS channel arrangement on the bidirectional line ring.

In step 300, determine that it is the E-NUT passage that ring is gone up a certain protection STS passage of AB section, protecting the STS passages with No. 26 is example, and to send configuration protection STS passage be the E-NUT channel command, its command type is: CMD CONFIG PROT ENUT; Certainly, can determine that also the protection STS passage of BC, CD, DA section on the BLSR protection rotating loop is the E-NUT passage, also all sections on the whole BLSR protection rotating loop can be defined as the E-NUT passage.When the E-NUT of configuration side's point table, then be after determining that a section is the E-NUT passage, the E-NUT table of configuration respective nodes, and then determine next section, and dispose the E-NUT table of respective nodes again, all determine to finish until the E-NUT passage that will determine.

After operating personnel have determined that No. 26 protection STS passages of the last AB section of ring are the E-NUT passage; to the input program order CMD CONFIG PROT ENUT of system; it is the E-NUT passage that this order is used for being provided with or deleting this protection STS passage; this order is when carrying out; at first to judge; current is to create E-NUT passage or deletion E-NUT passage, and is that example describes to create the E-NUT passage, creates E-NUT passage process and specifically comprises following step.

In step 310, the E-NUT of configuration node A table judges that BLSR protection rotating loop is 4 fine rings or 2 fine rings, if 4 fine rings then will be forbidden span switching and ring switching, promptly execution in step 320; If 2 fine rings are then only forbidden ring switching, promptly execution in step 330;

In step 320, bidirectional line protection rotating loop is 4 fine rings, and when No. 26 protections of AB section channel arrangement is the E-NUT passage, when span switching takes place, No. 26 service aisles of this section will can not get protection, forbids that promptly No. 26 work of AB section STS channel section switches; Simultaneously, when initial ring is switched, with respect to node A; to can not get protection with No. 26 work STS passages of the rightabout AD section of AB section, promptly forbid No. 26 work of AD section STS passage ring switching, like this; the E-NUT table configuration of node A is finished, then execution in step 340.

In step 330; bidirectional line protection rotating loop is 2 fine rings; when initial ring is switched; with respect to node A; to can not get protection with No. 2 work STS passages of the rightabout AD section of AB section, promptly forbid No. 2 work of AD section STS passage ring switching, like this; the E-NUT table configuration of node A is finished, then execution in step 340.

In order to be illustrated more clearly in the E-NUT table configuring condition of node A, specifically described with reference to Fig. 8, as shown in Figure 8, after the expression configuration ring of " being under an embargo " is gone up No. 26 protections of AB section STS passage and is the E-NUT passage, if the bidirectional line ring is 2 fine rings, node A east orientation ring switching on No. 2 service aisles is under an embargo; If be 4 fine rings, node A east orientation ring switching and west on No. 26 service aisles are under an embargo simultaneously to span switching.

Again be that each node generates the E-NUT table automatically and is elaborated behind the E-NUT passage with reference to Fig. 7 to encircling a certain protection STS channel arrangement.

In step 340, after the configuration of the E-NUT of node A table finishes, send the configuration message of the E-NUT table information that carries node A to Node B by node A.Configuration message response sign,, is put the configuration message response and is masked as not response when establishment protection STS passage is the E-NUT passage for responding in initial mark; A timer is set, is used to monitor the configuration message that node A sends when the protection passage is the E-NUT passage and whether gets back to initiation node A before time-out time, initiate node A if configuration message is got back to before time-out time, then the E-NUT channel arrangement is finished; If configuration message is not initiated node A at time-out time to still getting back to, node A will retransmit previous configuration message.

In step 350, Node B is judged the numerical values recited of counter in the configuration message according to the configuration message from node A that receives, and when counter equals 0, shows that configuration message sends to the adjacent node B of this node A, and promptly execution in step 360, the E-NUT table of configuration B; When counter greater than 0 and less than the bidirectional line ring on node number when subtracting 1, show that configuration message sends on other nodes between this node A and the adjacent node B, as shown in Figure 1, the node number is 4 on the ring, be that counter is greater than 0 and less than 3 o'clock, configuration message sends to node C or D, the E-NUT table of configuration node C or D, and promptly execution in step 390; When counter equals to encircle the node number and subtracts 1, show that configuration message sends it back this node A, promptly counter equals at 3 o'clock, stops the transmission of configuration message, and promptly execution in step 400.

In step 360, when counter values in the configuration message is 0, the E-NUT table of configuration node B, if 4 fine rings, when initial ring is switched, with respect to Node B, will can not get the protection of ring switching with No. 26 work STS passages of the configuration message rightabout section that receives, promptly forbid No. 26 work of BC section STS passage ring switching; If 2 fine rings, when initial ring is switched,, will can not get the protection of ring switching with No. 2 work STS passages of the configuration message rightabout section that receives with respect to Node B, promptly forbid No. 2 work of BC section STS passage ring switching

In step 370, judge that the bidirectional line ring is 4 fine rings or 2 fine rings, if 4 fine rings, then when span switching takes place, receive that PDU message direction is that No. 26 work STS passages of BA direction will can not get protecting, promptly execution in step 380; If 2 fine rings then do not relate to the segment protection problem, promptly direct execution in step 410, then the configuration ring is gone up other nodes;

In step 380, the bidirectional line ring is 4 fine rings, forbids that No. 26 work of AB section STS channel section switches; Execution in step 410;

In order to be illustrated more clearly in the E-NUT table configuring condition of Node B, specifically described with reference to Fig. 9, as shown in Figure 9, after the expression configuration ring of " being under an embargo " is gone up No. 26 protections of AB section STS passage and is the E-NUT passage, if the bidirectional line ring is 2 fine rings, Node B is under an embargo to ring switching in the west on No. 2 service aisles; If be 4 fine rings, Node B is under an embargo to ring switching and east orientation span switching in the west on No. 26 service aisles simultaneously.

In step 390, when counter values in the configuration message is when upward the node number subtracts 1 greater than 0 but less than ring, the E-NUT that shows Node B shows to have disposed to finish, Node B continues to send to node C or node D with configuration message, for 2 fine rings, when initial ring is switched, No. 2 of the East and West direction section of node C or node D work STS passages will can not get protection, promptly forbid disposing the east orientation of node of E-NUT table and west to No. 2 work of section STS passage ring switching; For 4 fine rings, when initial ring is switched, No. 26 work STS passages of the East and West direction section of node C or node D will can not get protection, promptly forbid disposing the east orientation of node of E-NUT table and west to No. 26 work of section STS passage ring switching.Execution in step 410 is finished in the E-NUT table configuration of node C or D;

In step 410, after the configuration of node E-NUT table finishes, counter values in the configuration message is added 1 back continue to transmit this configuration message next adjacent node to this node; Proceed the configuration of node E-NUT table, promptly execution in step 350;

In order to be illustrated more clearly in the E-NUT table configuring condition of node C and D, specifically described with reference to Figure 10,11, shown in Figure 10,11, after the expression configuration ring of " being under an embargo " is gone up No. 26 protections of AB section STS passage and is the E-NUT passage, when the bidirectional line ring is 2 fine rings, node C and D on No. 2 service aisles its east orientation and west to ring switching all be under an embargo; When the bidirectional line ring is 4 fine rings, node C and D on No. 26 service aisles its east orientation and west to ring switching all be under an embargo.

In step 400, when counter values in the configuration message equals to encircle the node number and subtracts 1, show ring go up node all configuration finish, at this moment whether decision node A receives the configuration message that it had before sent, if do not receive, judge then whether timer is overtime, and promptly execution in step 420; If receive, the continuation that then stops configuration message sends, and promptly execution in step 430;

In step 420, judge whether the timer that is provided with is overtime, overtime if timer does not have, then node A continues to wait for its previous configuration message of initiating of reception, promptly execution in step 400; If timer is overtime, show that then configuration message is not got back to node A at the appointed time, trigger the timer expiry order, promptly execution in step 340, and node A retransmits configuration message, if retransmit 3 times, report and alarm then.Wherein the timer expiry order is: TIMER EXPIRE.

In step 430, after node A receives own previous configuration message of initiating at the appointed time, put the configuration message response and be masked as and respond, and the continuation that stops configuration message sends;

In step 440, AB segment protection STS channel arrangement is that each node generates the E-NUT end of list (EOL) automatically behind the E-NUT passage on the ring.

In the configuration of E-NUT table of the present invention, comprise automatic generate pattern and artificial mode, above automatic generate pattern configuration E-NUT table is described in detail, artificial mode configuration E-NUT table is set forth below in conjunction with Fig. 2, Figure 12.

Configuration E-NUT table under artificial mode, of once can only dispose a node E-NUT table usually,

In step 600, determine the last node A of ring, in the definite parameter that will import of this node, and input parameter, its command type is: CMD CONFIG MANU, and the parameter of input comprises:

The described STS passage ring switching of input inhibit or permission node;

In step 610, according to the parameter of input, the respective items in the E-NUT table of modification node A is finished the configuration of the E-NUT table of node A, and continues configuration and encircle the E-NUT table of going up other respective nodes.

If determine that it is the E-NUT passage that ring is gone up certain work STS passage of AB section, adopt artificial mode configuration ring to go up the E-NUT table of node so, only need to determine last 2 points of ring, be node A and Node B, this E-NUT of 2 table is carried out the configuration of artificial mode, and as shown in Figure 5 and Figure 6, the parameter that need import at node A is: certain work STS channel number, as being example, then be No. 1 work STS passage with No. 1 passage; If 2 fine rings, the west of then forbidding node A is to ring switching, if 4 fine rings, the west of then forbidding node A to ring switching and the west of forbidding node A to span switching.The parameter that need import in Node B is: No. 1 work STS passage; If 2 fine rings are then forbidden the east orientation ring switching of Node B, if 4 fine rings are then forbidden the east orientation ring switching of Node B and forbidden the east orientation span switching of Node B.After " √ " expression configuration ring is gone up No. 1 work of AB section STS passage and is the E-NUT passage among Fig. 5 and Fig. 6, node A and Node B on No. 1 passage east orientation or west to ring switching or span switching be under an embargo.

If it is the E-NUT passage that specified node A goes up No. 26 protection passages of AB section.So:

1) two fine rings:

For node A, the ring switching of No. 2 service aisles of AD section is under an embargo, and for Node B, the ring switching of No. 2 service aisles of BC section is under an embargo, and for node C or D, the ring switching of No. 2 service aisles is under an embargo on the both direction.

2) 4F Ring:

For node A, the ring switching of No. 26 service aisles of AD section is under an embargo, No. 26 service aisle span switchings of AB section are under an embargo, for Node B, the ring switching of No. 26 service aisles of BC section is under an embargo, No. 26 service aisle span switchings of AB section are under an embargo, and for node C or D, the ring switching on No. 26 service aisles of both direction is under an embargo.

Dispose the E-NUT table in the present invention and comprise automatic generate pattern and artificial mode, above automatic generate pattern and artificial mode configuration E-NUT table are described respectively, wherein, automatically generate pattern and artificial mode can be changed mutually, below in conjunction with Fig. 2, Figure 13 the artificial mode that disposes the E-NUT table are converted to automatic mode and are elaborated.

In step 700, under artificial mode, determining this node A and revising node A configuration E-NUT table schema is automatic mode; Its command type is: CMD SWITCH MODE A;

In step 710, node A transmission carries artificial mode and is converted to the conversion message of automatic mode information to Node B;

Wherein, the conversion message comprises following field:

Node number (Node) field: sending node in the expression conversion message;

Pattern (Mode) field: the expression automatic mode is transformed into artificial mode or artificial mode is transformed into automatic mode.

The type that node A sends to the conversion message of Node B is: PDU SWITCH MODE A, and first byte is OXFE, the 2nd, 3 bytes are 1.

In step 720, according to the conversion message that receives, revising Node B configuration E-NUT table schema is automatic generate pattern, and transmits conversion message next adjacent node to Node B, and promptly node C goes up all nodes until ring and receives the conversion message;

In step 730, whether decision node A receives the conversion message that it sends, if receive, then finishes the conversion of artificial mode to automatic mode; If do not receive, then continue to wait for to receive.

Above artificial mode is converted to automatic generate pattern and is described, below in conjunction with Fig. 2, Figure 14 the automatic mode that disposes the E-NUT table is converted to artificial mode and is elaborated.

In step 800, under automatic mode, revising node A configuration E-NUT table schema is artificial mode; Its command type is: CMD SWITCH MODE M;

In step 810, node A sends and to carry conversion message that automatic mode is converted to artificial mode information to Node B and stop timer;

The type that node A sends to the conversion message of Node B is: PDU SWITCH MODE M, and first byte is 0XFF, the 2nd, 3 bytes are 1.

In step 820, according to the conversion message that receives, revising this node configuration E-NUT table schema is artificial mode, and transmits the conversion message to next adjacent node, gets back to node A until the conversion message, simultaneously, all stops timer at each node;

In step 830, whether decision node A receives the conversion PDU message that it sends, if receive, then finishes by the conversion of automatic mode to artificial mode, if do not receive, then continues to wait for to receive.

Bidirectional line protection reverse method of the present invention also comprises backup and the recovery to node E-NUT table; the E-NUT table is as significant data; should be saved in the accent electric protection memory block of system; when system's sudden power; do not cause the loss of data in the E-NUT table; and when system restart, the data in the E-NUT table just can be recovered from transfer the electric protection memory block immediately, and therefore adopting the mode of database is the comparison reasonable manner.In logic, E-NUT table database has many records, is index with STS passage ID, a record in each STS passage correspondence database, and E-NUT table database comprises following field:

Pattern (MODE) field: expression artificial mode or automatic mode;

State (STATUS) field: whether expression E-NUT table builds up sign: build up/well afoot

The west is to encircling (WESTRING) field: whether forbid to ring switching in the expression west: allow/forbid

Western to section (WESTSPAN) field: whether forbid to span switching in the expression west: allow/forbid

East orientation ring (EASTRING) field: whether expression east orientation ring switching is forbidden: allow/forbid

East orientation section (EASTSPAN) field: whether expression east orientation span switching is forbidden: allow/forbid

When system restarted, the data in the E-NUT table can be recovered from the database of transferring electric protection immediately like this.

E-NUT table has been described each work STS passage and is forbidden and switch enable state switching of this node, is actually a two-dimensional array, one-dimensional representation East and West direction, another dimension expression work STS passage.We need allow illegal state to write down and encapsulate to switching on the single direction of single STS passage, prepare against when obtaining the E-NUT channel information and call.Concrete, class CEnutRecord has described switching on the single direction of single STS passage and has allowed and illegal state, has encapsulated the content of following three aspects:

1, whether E-NUT channel request PDU responds sign

Initial mark is for responding

When building work STS passage was the E-NUT passage, this sign was changed to not response, and sends configuration message to adjacent node.If received the response message of adjacent node in time-out time, this sign is changed to and responds; If in time-out time, do not receive the response message of adjacent node, check during timeout treatment that this is masked as not response, will retransmit configuration message.

When establishment protection STS passage was the E-NUT passage, this sign was not changed to response, and sends configuration message to adjacent node.If receive this configuration message that oneself is initiated in time-out time, this sign is changed to and responds; If in time-out time, do not receive this configuration message that oneself is initiated, check during timeout treatment that this is masked as not response, will retransmit configuration message.

2, ring switching and span switching are forbidden or permission information

Represent the ring switching of this STS passage assigned direction or span switching is forbidden or enable state.Initially all be enable state, and along with the message that issues and receive of order changes.

3, E-NUT channel configuration information

Represent whether this STS passage on this direction is configured to the E-NUT passage.Divide three state: create, create and wait to delete, respectively expression be not created as the ENUT passage, be created as the ENUT passage, wait to delete the ENUT passage.

As shown in figure 15, be not initialized as establishment; After receiving establishment E-NUT channel command, then the migration of E-NUT channel status is for creating; After receiving deletion E-NUT channel command, then the migration of E-NUT channel status is deleted for waiting; After receiving the response pdus message, then the migration of E-NUT channel status is not for creating.

More than the embodiment of creating the E-NUT passage is described in detail, and the process of deletion E-NUT passage is identical substantially with the process of creating the E-NUT passage, being about to create ring switching or the span switching forbidden in the E-NUT passage process all is set to allow, therefore, the specific implementation process of deletion E-NUT passage is not given unnecessary details at this.

Claims

1, a kind of bidirectional line protection reverse method, described method comprises step:

Determine on the described bidirectional line that at least one synchronous driving signal STS passage of at least one section need be created as not protected or participation protective E-NUT passage or delete described E-NUT passage not, wherein, the described STS passage that is defined as the E-NUT passage can be service aisle or protection passage;

2, bidirectional line protection reverse method as claimed in claim 1 is characterized in that, the step of the artificial mode of described configuration E-NUT parameter list item comprises:

3, bidirectional line as claimed in claim 2 protection reverse method is characterized in that describedly determining out to comprise to the step of each node input parameter:

The described STS passage ring switching of input inhibit or permission node;

4, bidirectional line as claimed in claim 1 protection reverse method is characterized in that, when described need were configured to the E-NUT passage or need the STS passage of deletion E-NUT passage to be service aisle, the step of the automatic mode of described configuration E-NUT parameter list item comprised:

If do not receive, then described end node retransmitted configuration message.

5, bidirectional line as claimed in claim 4 protection reverse method is characterized in that the step of E-NUT parameter list item of this end node of the described work STS of described configuration passage or the step of upgrading the E-NUT parameter list item of described opposite end adjacent node comprise:

6, bidirectional line protection reverse method as claimed in claim 1 is characterized in that, described need are configured to the E-NUT passage or need the STS passage of deletion E-NUT passage is that the step of the automatic mode of described configuration E-NUT parameter list item comprises when protecting passage:

7, bidirectional line protection reverse method as claimed in claim 6 is characterized in that, the step of the E-NUT parameter list item of this end node of the described protection of described configuration STS passage comprises:

If 2 fine rings, then forbid the ring switching of the work STS passage corresponding with the described STS of protection passage on the rightabout section of the section of the described E-NUT of being defined as passage with respect to this end node;

If 4 fine rings, the span switching of then forbidding the work STS passage of the described protection STS passage correspondence on the section of the described E-NUT of being defined as passage is forbidden the ring switching of the work STS passage corresponding with the described STS of protection passage on the rightabout section of the section of the described E-NUT of being defined as passage with respect to this end node simultaneously;

If 2 fine rings, then allow the ring switching of the work STS passage corresponding with the described STS of protection passage on the rightabout section of the section of the described E-NUT of being defined as passage with respect to this end node;

If 4 fine rings; then allow the span switching of the work STS passage of the described protection STS passage correspondence on the section of the described E-NUT of being defined as passage, allow the ring switching of the work STS passage corresponding with the described STS of protection passage on the rightabout section of the section of the described E-NUT of being defined as passage simultaneously with respect to this end node.

8, bidirectional line as claimed in claim 6 protection reverse method is characterized in that, the E-NUT parameter list item of the described opposite end of described renewal adjacent node is also transmitted described configuration message step of other node to the bidirectional line ring and comprised:

When the described E-NUT passage of configuration:

When the described E-NUT passage of deletion:

9, bidirectional line protection reverse method as claimed in claim 1 is characterized in that, the artificial mode of described configuration E-NUT parameter list item and the automatic mode of described configuration E-NUT parameter list item can be changed mutually, and the step of described conversion comprises:

Need to determine this node of modification pattern,

10, as claim 4 or 6 or 9 described bidirectional line protection reverse methods; the configuration message that it is characterized in that being used between described each node transmitting the E-NUT channel information is a protocol data unit message; the conversion message that is used for transmitting the conversion of E-NUT table configuration mode on the ring between each node is a protocol data unit message, and described protocol data unit message is to transmit by the reserve bytes in data communication channel or the Synchronous Optical Network expense.

11, bidirectional line protection reverse method as claimed in claim 10 is characterized in that described protocol data unit message as configuration message comprises following field: the STS channel number field: represent STS channel number definite in the described message;

Counter field: the transmission counter of representing described message;

Request/response field: represent that described message is request message or response message;

Work/protected field: represent that described message is that the configuration effort passage is for the E-NUT passage or the configuration protection passage is the E-NUT passage;

12, bidirectional line protection reverse method as claimed in claim 10 is characterized in that described protocol data unit message as the conversion message comprises following field:

The node number field: expression sends this node number of described message;

13, bidirectional line protection reverse method as claimed in claim 1 is characterized in that, also comprises step, sets up E-NUT parameter list association database; Preserve E-NUT parameter list item number according in database, wherein, the field of described database comprises:

Pattern field: expression artificial mode or automatic generate pattern;

Mode field: whether expression E-NUT table builds up sign;

14, bidirectional line protection reverse method as claimed in claim 1; it is characterized in that also comprising step; forbid on direction of a STS passage in the recording configuration E-NUT parameter list item or allow switch status; the state of described record is encapsulated as class; when obtaining the E-NUT channel information, to call; wherein, the content of described class comprises:

Whether be configured to the E-NUT passage;

Ring switching is to forbid or allow;

Span switching is to forbid or allow.