CN102611570A - Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable - Google Patents
Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable Download PDFInfo
- Publication number
- CN102611570A CN102611570A CN2011104560371A CN201110456037A CN102611570A CN 102611570 A CN102611570 A CN 102611570A CN 2011104560371 A CN2011104560371 A CN 2011104560371A CN 201110456037 A CN201110456037 A CN 201110456037A CN 102611570 A CN102611570 A CN 102611570A
- Authority
- CN
- China
- Prior art keywords
- port
- state
- protection
- card
- molded lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to a method for realizing port-level protection of a packet transport network (PTN) by use of a Y-shaped cable. In the method, port protection is realized between two network elements of the PTN connected through a pair of optical fibers, and the two network elements of the PTN are connected by a pair of optical fibers only; the public end of another Y-shaped cable is connected with a receiving optical fiber, and the two branching ends are connected with the receiving ports of packet processing board cards 1 and 2; the path of the card 1 is set as a primary section, and the path of the card 2 is set as a secondary section; when in a normal state without failure, the service runs on a working port of the card 1; and when the working port of the card 1 fails or receives a switch request signal, the service is switched to the port of the spare card 2. The method provided by the invention has the beneficial effects that: if a pair of optical cables are limited between two network elements by customer resources, the service interruption time can be reduced within 50ms by the method when the SDH (synchronous digital hierarchy) port of the PTN equipment fails, thus the protection on the SDH port is realized.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of Packet Transport Network and use Y molded lines cable to realize the method for port level protection.
Background technology
1+1msp (multiplex section protection multiplex section protection) protection provides two redundant links end to end; Redundant comprising PTN equipment upper plate card redundancy, laser, circuit is redundant; As shown in Figure 2; When the active link fault, business can be changed to the protection passage in the 50ms switching time inscribe that carrier class requires, the link protection technology that 1+1msp is a kind of maturation, be widely used on SDH equipment; Pairing ITU-T (Standardization Sector of International Telecommunication Union Telecommunication Standardization Sector international telecommunication union telecommunication), communication standard is for G.841; In using the secondary hit that MSP switches the back business takes place in order to prevent the client; G.841 appendix B optimizes 1+1MSP; Major and minor link all is defined as active link; Accomplish the back and remove link number in the K2 byte to specify the work at present link be primary link through switching, eliminated the process of switching recovery, the business when recovering of preventing to switch is interrupted negative effect that client's application is brought again.Can all dispose integrated circuit board backup, interoffice cable backup at the PTN two ends for optical cable, the unconfined client of integrated circuit board procurement payment, agreement adopts the mode of 1+1msp to carry out the full guard mode of integrated circuit board, port and circuit; But when clients fund restriction can't want PTN equipment SDH integrated circuit board, port are protected when interoffice is disposed backup optical cable or backup optical cable and temporarily can't be put in place owing to reasons such as constructions at this moment, Y-Cable is a kind of good method.As its name suggests, Y molded lines cable (Y-cable) is owing to the connected mode of cable between the equipment is extremely named as capital Y in the English, and it can realize the protection in the port level 50ms when client's interoffice has only a pair of transmitting-receiving optical cable.
Summary of the invention
The present invention has purpose just in order to overcome the deficiency of above-mentioned technology; And a kind of Packet Transport Network uses Y molded lines cable to realize the method for port level protection relating generally to the guard method of PTN/SDH/MSTP/SONET (Packet Transport Network Packet Transport Network/Synchronous Digital Hierarchy SDH/Multi-Service Transfer Platform is based on multi-service transport platform/Synchronous OpticalNetwork Synchronous Optical Network of SDH).
The present invention solves the technical scheme that its technical problem adopts: this Packet Transport Network uses Y molded lines cable to realize the method for port level protection, between the network element of two Packet Transport Network that only have a pair of optical fiber to connect, realizes port protection, and concrete steps are:
(1), only a pair of optical fiber to connect between the network element of two Packet Transport Network, adopts the public end of a Y molded lines cable to connect and send optical fiber, two bags that two branch terminals connect network elements are handled integrated circuit board cards 1 and the transmit ports that block 2; Adopt the public end of another root Y molded lines cable to connect reception optical fiber, two branch terminals connect two bags and handle integrated circuit board cards 1 and the receiving ports that block 2;
(2), path that card 1 place is set is principal piece, the path at card 2 places be secondary section, secondary section provides protection for principal piece; During normal fault-free, service operation is at the working port of card 1;
(3), when card 1 working port fault or when receiving the switching request signal, switching services is to the port of standby card 2.
Further; Described Y molded lines cable local port protection agreement adopts optimizes the multiplex section protection protocol; Local port state and the current switch status of external command decision use the K byte to show local switch status, the b1 of K1～b4 indication request Class Type; The service aisle of the b5 of K1～b8 indication switching request, b1～b4 of K2 indicates the master of current protection group to use service aisle.
Further; Described K2 byte only appear on the secondary section; When receiving terminal is received path, switching request selection card 2 place as principal piece, follow-up as when no longer including new switching request, switching action is this time accomplished; Segment number in the K2 byte is eliminated, and current card 2 place sections remain on present segment for principal piece makes business.
The effect that the present invention is useful is: customer resources limits when having only a pair of optical cable between two network elements; The SDH port failure of PTN equipment takes place; Use the method that service outage duration is reduced in the 50ms; Realize the protection of SDH port, when having solved client's cable resource deficiency, PTN equipment SDH port failure service outage duration is controlled.
Description of drawings
Fig. 1 hardware connects sketch map;
Fig. 2 is a Y molded lines cable MSP state machine;
Fig. 3 is that Y molded lines cable MSP pulls out the reciprocal process of receiving fibre;
Fig. 4 is that Y molded lines cable MSP inserts the reciprocal process of receiving fibre;
Fig. 5 is the reciprocal process of Y molded lines cable MSP external command LP;
Fig. 6 is the reciprocal process of Y molded lines cable MSP external command LP Clr;
Fig. 7 is the reciprocal process of Y molded lines cable MSP external command FS;
Fig. 8 is the reciprocal process of Y molded lines cable MSP external command FS CLR;
Fig. 9 is that 1+1MSP connects topological diagram;
Figure 10 is that Y molded lines cable connects topological diagram.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with for example.Should be appreciated that described hereinly, and be not used in qualification the present invention for example only in order to explaining the present invention.
1, specific embodiment:
Y molded lines cable (Y-Cable) MSP is a kind of port protection agreement of this locality.Local port status and external command have determined current switch status.In Y molded lines cable (Y-Cable) MSP, the K byte is not used further to consult, and just is used to show the switch status of local MSP.
The K combination of bytes used among the Y-Cable with reference to G.841 among the appendix B 1+1 optimize MSP, definition wherein is following:
K1, K2 need send the local state of indication on the enable port, the b1 of K1～b4 indication request Class Type, and the service aisle of the b5 of K1～b8 indication switching request, b1～b4 of K2 indicates the master of current protection group to use service aisle.
The Bits1-4 of K1 byte shows the classification of request, and is as shown in the table:
Form 1K1 byte Bits1-4 explanation
The Bits5-8 of K1 byte shows protected channel number, as follows:
Form 2K1 byte Bit5-8 explanation
The K2 byte is used for showing current master channel number.
The explanation of form 3K2 byte
2, state machine:
As shown in Figure 2, for Y-Cable MSP, local state is divided into four kinds: Idle state, Switch state, Lockout state and Wtr (wait to restore) state.Local port state SF (signal fail) and SD (signal degrade) or external command FS (force switch) can make MSP forward the Switch state to from the Idle state.The Normal incident can make the Switch state forward the Wtr state to; After Wtr is overtime, will forward the Idle state to.
External command LP (lockout of protection) can make the idle state, and switch state and wtr state forward the Lockout state to; Support lockout of protection (protection locking), force (Forced Switch), manual (Manual Switch), and clear external commands such as (switching removing), priority lockout＞force＞manual; The order effect is equal to the corresponding command of MSP.
3, groundwork flow process:
Basic principle is with reference to Fig. 1, and the path at card 1 (Card 1) and place, card 2 (Card 2) all is equal to active section, and the path of blocking 1 (Card1) place under the normal condition is a principal piece, and the path at place, card 2 (card 2) is secondary section, and secondary section provides protection for principal piece; Control protection K2 byte only appear on the secondary section; When receiving terminal receives that path, switching request selection card 2 (card2) place is as principal piece; Follow-up as when no longer including new switching request, switching action is this time accomplished, and the segment number in the K2 byte is eliminated; Current card 2 (card2) place section remains on present segment for principal piece makes business; Bag is handled between integrated circuit board (PPC) and the business board working method work according to 1: 1, promptly under the operating state and the two-way communication of work veneer, switches under the guard mode and protects single plate bidirectional to communicate by letter.
Y-Cable MSP compares with 1+1 optimization multiplex section and does not carry out the mutual of K byte, also is indifferent to the state of opposite end network element.Its incident according to the local terminal network element, like SF, SD, FS etc. switch.
Working (work), Protection (protection), TX (transport transmission), RX (receive reception) Fiber (optical fiber).
The condition of switching is equal to 1+1 Optimal Linear MSP protection, supports conditions such as LOS/LOF/MS-AIS/MS-RDI/MS-EXC/MS-DEG/Cardoffline (LOS Loss of Signal dropout/LOF Loss of Frame LOF/MS-AIS multiplex section-alarmindication signal multiplex section alarm indication information/MS-RDI multiplex section-remote defect indication multiplex section-remote bug indication/MS-EXC multiplex section-error excessive multiplex section error code excessive/MS-DEG multiplex section degrade multiplex section deterioration/cardoffline veneer off-line).If the trigger condition of switching of same levels appears in work and protection simultaneously, the protection group is failure to actuate, and promptly Y-cable only protects local terminal port, veneer and slack.Variously switch operating process under the condition:
Receive fine reciprocal process 3.1 pull out
As shown in Figure 3, after this locality detects SF, switch at once, send the K byte to the opposite end then, to show the state of local terminal.
Receive fine reciprocal process 3.2 insert
As shown in Figure 4, after local terminal MSP detects the SF disappearance, get into the WTR state at once and send 0x6110 to the opposite end.After WTR is overtime, switch, send 0x20 then, to upgrade current master channel number.
3.3 the reciprocal process of external command LP (lockout)
As shown in Figure 5, Lockout of protection is the external command an of this locality, does not carry out K byte agreement.
As shown in Figure 6, the effect of external command LP is removed in the Clr order, equally also need not carry out K byte agreement.After removing the LP order of local terminal, only need send 0x10 and get final product to the opposite end.
3.4 the reciprocal process of external command FS
As shown in Figure 7, after external command Forced Switch was carried out in this locality, local terminal was switched at once, K byte 0xE110 took place to show the state of local terminal to the opposite end then.
As shown in Figure 8, after external command clr was carried out in this locality, local terminal upgraded current master channel number, sends 0x20 to the opposite end then.
Fig. 9 is that original technological 1+1MSP connects topological diagram; Figure 10 is that Y molded lines cable of the present invention connects topological diagram; Used 1: 2 optical splitter; STM-1 working path:155.520M Synchronous Transfer Module working path wherein, 155.520M synchronous transfer mode operating path; STM-1 protection path:155.520M Synchronous Transfer Module protection path, 155.520M synchronous transfer mode protection path; NE:Network element network element; The network test analyzer: also claiming specialized network tester or network measuring appearance usually, is a kind of portable, visual intelligent detection equipment that can detect network operation situation.Bag transmission on the POS::packet overSONET/SDH SONET/SDH.
It is understandable that, for a person skilled in the art, technical scheme of the present invention and inventive concept are equal to replacement or change the protection range that all should belong to the appended claim of the present invention.
Claims (5)
1. a Packet Transport Network uses Y molded lines cable to realize the method for port level protection, between the network element of two Packet Transport Network that only have a pair of optical fiber to connect, realizes port protection, and it is characterized in that: the concrete steps of this method are:
(1), only a pair of optical fiber to connect between the network element of two Packet Transport Network, adopts the public end of a Y molded lines cable to connect and send optical fiber, two bags that two branch terminals connect network elements are handled integrated circuit board cards 1 and the transmit ports that block 2; Adopt the public end of another root Y molded lines cable to connect reception optical fiber, two branch terminals connect two bags and handle integrated circuit board cards 1 and the receiving ports that block 2;
(2), path that card 1 place is set is principal piece, the path at card 2 places be secondary section, secondary section provides protection for principal piece; During normal fault-free, service operation is at the working port of card 1;
(3), when card 1 working port fault or when receiving the switching request signal, switching services is to the port of standby card 2.
2. Packet Transport Network according to claim 1 uses Y molded lines cable to realize the method for port level protection; It is characterized in that: described Y molded lines cable local port protection agreement adopts optimizes the multiplex section protection protocol; Local port state and the current switch status of external command decision use the K byte to show local switch status, the b1 of K1～b4 indication request Class Type; The service aisle of the b5 of K1～b8 indication switching request, b1～b4 of K2 indicates the master of current protection group to use service aisle.
3. Packet Transport Network according to claim 2 uses Y molded lines cable to realize the method for port level protection; It is characterized in that: described K2 byte only appear on the secondary section; When receiving terminal is received path, switching request selection card 2 place as principal piece, follow-up as when no longer including new switching request, switching action is this time accomplished; Segment number in the K2 byte is eliminated, and current card 2 place sections remain on present segment for principal piece makes business.
4. Packet Transport Network according to claim 2 uses Y molded lines cable to realize the method for port level protection; It is characterized in that: the local port state of Y molded lines cable local port protection agreement is divided into four kinds: the Idle state; The Switch state, Lockout state and Wtr state, local port state SF and SD or external command FS; Enable to forward the Switch state to from the Idle state, the Normal event enable forwards the Wtr state to from the Switch state; After Wtr is overtime, forward the Idle state to, external command LP enables the state from idle, and switch state and wtr state forward the Lockout state to.
5. Packet Transport Network according to claim 4 uses Y molded lines cable to realize the method for port level protection, and it is characterized in that: the concrete implementation method of switching trigger condition is:
(1), pulls out and receive fine reciprocal process: after this locality detects SF, switch, send the K byte to the opposite end then, at once to show the state of local terminal;
(2), insert and receive fine reciprocal process: after local terminal MSP detects the SF disappearance, get into the Wtr state at once and send 0x6110 to the opposite end.After Wtr is overtime, switch, send 0x20 then, to upgrade current master channel number;
(3), the reciprocal process of external command FS: after external command FS was carried out in this locality, local terminal was switched at once, K byte 0xE110 took place to show the state of local terminal to the opposite end then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104560371A CN102611570A (en) | 2011-12-30 | 2011-12-30 | Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104560371A CN102611570A (en) | 2011-12-30 | 2011-12-30 | Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102611570A true CN102611570A (en) | 2012-07-25 |
Family
ID=46528742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104560371A Pending CN102611570A (en) | 2011-12-30 | 2011-12-30 | Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102611570A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471610A (en) * | 2014-09-05 | 2016-04-06 | 中兴通讯股份有限公司 | HQoS protection method and HQoS protection device through multiple board cards |
| CN107579914A (en) * | 2016-07-04 | 2018-01-12 | 中兴通讯股份有限公司 | A kind of apparatus and method for quickly robbing logical business route |
| CN109039520A (en) * | 2018-06-15 | 2018-12-18 | 上海欣诺通信技术股份有限公司 | Straddle cartoon letters method, optical communication system and computer storage medium |
| CN111917462A (en) * | 2020-06-23 | 2020-11-10 | 深圳震有科技股份有限公司 | Protection control method and device for 5G forward transmission equipment and computer equipment medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281302A (en) * | 1999-07-15 | 2001-01-24 | 深圳市华为技术有限公司 | Protective reversing and detecting method of synchronously triggered multiplexing band under multiple securities mechanism |
| CN1783825A (en) * | 2004-12-03 | 2006-06-07 | 华为技术有限公司 | Multiplex section protective protocol realizing method |
| US20090262790A1 (en) * | 2008-04-17 | 2009-10-22 | Alcatel Lucent | Method of recovery from active port tx failure in y-cable protected pair |
-
2011
- 2011-12-30 CN CN2011104560371A patent/CN102611570A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281302A (en) * | 1999-07-15 | 2001-01-24 | 深圳市华为技术有限公司 | Protective reversing and detecting method of synchronously triggered multiplexing band under multiple securities mechanism |
| CN1783825A (en) * | 2004-12-03 | 2006-06-07 | 华为技术有限公司 | Multiplex section protective protocol realizing method |
| US20090262790A1 (en) * | 2008-04-17 | 2009-10-22 | Alcatel Lucent | Method of recovery from active port tx failure in y-cable protected pair |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471610A (en) * | 2014-09-05 | 2016-04-06 | 中兴通讯股份有限公司 | HQoS protection method and HQoS protection device through multiple board cards |
| CN107579914A (en) * | 2016-07-04 | 2018-01-12 | 中兴通讯股份有限公司 | A kind of apparatus and method for quickly robbing logical business route |
| CN109039520A (en) * | 2018-06-15 | 2018-12-18 | 上海欣诺通信技术股份有限公司 | Straddle cartoon letters method, optical communication system and computer storage medium |
| CN109039520B (en) * | 2018-06-15 | 2020-09-04 | 上海欣诺通信技术股份有限公司 | Cross-board card communication method, optical communication system and computer storage medium |
| CN111917462A (en) * | 2020-06-23 | 2020-11-10 | 深圳震有科技股份有限公司 | Protection control method and device for 5G forward transmission equipment and computer equipment medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7352966B2 (en) | Method and apparatus for capacity-efficient restoration in an optical communication system | |
| US8023819B2 (en) | Method and apparatus for network fault detection and protection switching using optical switches with integrated power detectors | |
| KR100547808B1 (en) | Redundancy Device and Method of Gigabit Ethernet Passive Optical Network and Frame Structure for Its Control | |
| CN101197634B (en) | Method, system and single board device for implementing automatic protection rearrangement of main and standby plate | |
| EP1708379B1 (en) | Communication system having backup function for several series devices and method for carrying out the function of switching | |
| US7839772B2 (en) | Line redundant device and method | |
| CN104393914B (en) | A multiplex route recovering method for an optical fiber differential protection device | |
| US20060274782A1 (en) | SDH transmission apparatus that can relieve ethernet signal failure | |
| CN101159504B (en) | Synchronous digital hierarchy based ethernet protecting method | |
| CN101282586B (en) | Method, system and apparatus for detecting optical fiber fault in passive optical network | |
| CN101262406A (en) | Two-way loop network system and its control method | |
| CN102611570A (en) | Method for realizing port-level protection of packet transport network (PTN) by use of Y-shaped cable | |
| US20040085954A1 (en) | Out-of-band signalling apparatus and method for an optical cross connect | |
| CN100596037C (en) | Apparatus for providing node protection in optical network and implementing method thereof | |
| US6859430B1 (en) | Protection switching of virtual connections | |
| CN104601216B (en) | A kind of communication equipment protection device | |
| CN100466546C (en) | System and method for realizing business protection using LCAS protocol | |
| CN1910896B (en) | Method, apparatus and protection card for improving circuit testing services on a multi-service provisioning platform | |
| US7978715B2 (en) | Network connection device and collection/distribution device | |
| CN1983889B (en) | Method and system for transmitting network service | |
| KR20020048979A (en) | Method and system for communication protection | |
| US20020168129A1 (en) | System and method for bridge and roll in a photonic switch | |
| Cisco | Configuring APS | |
| US7039006B2 (en) | Board duplexing apparatus for asynchronous transfer mode switch and method of controlling the same | |
| CN101610166B (en) | Intermediate node, cascade protection system and cascade protection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |