CN103607237A - One-to-one bidirectional optical circuit protection switching method based on control command bytes - Google Patents
One-to-one bidirectional optical circuit protection switching method based on control command bytes Download PDFInfo
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- CN103607237A CN103607237A CN201310651541.6A CN201310651541A CN103607237A CN 103607237 A CN103607237 A CN 103607237A CN 201310651541 A CN201310651541 A CN 201310651541A CN 103607237 A CN103607237 A CN 103607237A
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Abstract
The invention discloses a one-to-one bidirectional optical circuit protection switching method based on control command bytes. The method comprises the following steps: judging the statuses of work and a protective circuit by a first single disk according to optical power detected by a PIN tube; reporting an optical power loss alarm when the optical power detected by the PIN tube is lower than an optical loss threshold; configuring a status byte K2 according to the optical power loss alarm, and configuring a byte K1 to describe the protection switching action to be simultaneously taken by the first single disk and a second single disk; transmitting the bytes K1 and K2 to the second single disk; carrying out the corresponding protection switching action by the second single disk according to the bytes K1 and K2 which are received, so that at the end, the opposite end is informed when protection switching action is carried out in the receiving direction of the first single disk, and protection switching action is simultaneously carried out in the transmitting direction of the second single disk, thus receiving and transmitting actions are unified, and unblocked optical signals in operation are ensured all the time.
Description
Technical field
The present invention relates to optical communication transmission technique field, be specifically related to one to the one two-way Optical Line Protection reverse method based on control command byte.
Background technology
In existing WDM/OTN system, generally adopt the mode of 1+1 to carry out Optical Line Protection.The protected mode of 1+1 is taked 50:50 light splitting at transmitting terminal to business light signal, chooses better performances Yi road business light signal process at receiving terminal.The advantage of this concurrent debit's of choosing formula is that control method is simple, protective device is easy, and shortcoming is to cause business light (1550nm wave band) luminous power when through protective device at least to reduce 4-5dB, has had a strong impact on performance and the transmission range of whole system.
1:1 protected mode can effectively reduce the loss of business light signal luminous power; because in whole transmission system; only at work at present circuit, have business light to exist, protection circuit is whether use the OSC monitor optical (1510nm wave band) of WDM/OTN system to detect light path normal.So just avoid business light being carried out to the light splitting of 50:50 making a start, can effectively reduce optical power attenuation, improve the indexs such as signal to noise ratio of whole system, and then improve transmission range.
In the protection system of 1:1; generally to take mode that business key light luminous power, service aisle monitor optical luminous power, protection channel monitor optical luminous power are monitored; can effectively judge the working condition of working line and the protection circuit of local terminal like this, choose suitable circuit as current effective working line.But the protection system of 1:1 is to take the working method published making a start, and only has in other words above current effective working line and just has business light (1550nm wave band), and other one does not have business light above protection circuit.Therefore when the receive direction of local terminal is protected switching action, must notify the sending direction of opposite end to protect switching action, the unified action of transmitting-receiving can guarantee that business light signal is unimpeded all the time so simultaneously.
Summary of the invention
Technical problem to be solved by this invention is how when the receive direction of local terminal is protected switching action, and the sending direction of notice opposite end is protected switching action simultaneously, makes to receive and dispatch unified action, guarantees business light signal unimpeded problem all the time.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of one to one two-way Optical Line Protection reverse method based on control command byte, comprises step:
The luminous power that S1, the first single-deck detect according to PIN pipe is carried out the state of judgement work and protection circuit;
S2, the luminous power that detects when PIN pipe, lower than light drop-thresholds, report luminous power to lose alarm;
S3, according to luminous power, lose alarm state byte K2 is configured, and configure K1 byte and illustrate that the first single-deck and the second single-deck need the protection switching action of taking simultaneously;
S4, send above-mentioned K1, K2 byte to the second single-deck;
S5, the second single-deck are protected switching action accordingly according to the K1, the K2 byte that receive.
In said method, described K1 byte representation the first single-deck and the second single-deck need the protection switching action of taking simultaneously; Described K2 byte representation the first single-deck or corresponding optical switch operating state and the alarm status of the second single-deck.
In said method, in described step 5, described the second single-deck is protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
In said method, after described step 5, also comprise:
K1, K2 byte that S6, described the second single-deck generate himself send to described the first single-deck;
S7, described the first single-deck receive K1, the K2 byte that described the second single-deck sends;
S8, described the first single-deck are protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
In said method, before described step S4, also comprise:
Described the first single-deck receives webmaster and issues Artificial Control order, and enters Artificial Control pattern;
Described the first single-deck is protected switching action by receiving the K1 byte of webmaster or described the second single-deck transmission.
In said method, described K1, K2 byte and the protection switching action that need to take, the corresponding relation of operating state, alarm status is:
Init state: two ends acquiescence is all in master state, K2=0xA8, K1=0xA0;
Condition=(primary & & local terminal alarm 1/1/0 & & RevK1 unequal to 0xA9), action=receiving end is made a start main standby, sends K1=0xAC;
Condition=(primary & & local terminal alarm 0/0/0 or 1/1/0 & & RevK1=0xAC), action=receiving end is made a start main standby, sends K1=0xA0;
Condition=(primary & & local terminal alarm 0/0/1 & & RevK1=0xAC), action=send K1=0xA9, when receiving K1=0xA9, automatically lock primary;
Condition=(standby & & local terminal alarm 0/0/0 & & remote alarm 0/0/0), action=Wait-to-Restore, then after, receiving end is made a start and standby is fallen mainly, sends K1=0xA3;
Condition=(standby & & local terminal alarm 1/0/1 & & RevK1 unequal to 0xAD), action=receiving end is made a start standby main, sends K1=0xA3;
Condition=(standby & & local terminal alarm 0/0/0 & & RevK1=0xA3), action=receiving end is made a start standby main, sends K1=0xA0;
Condition=(standby & & local terminal alarm 0/1/0 & & RevK1=0xA3), sends K1=0xAD, when receiving K1=0xAD, automatically locks standby;
Condition=(standby & & local terminal alarm 1/1/1), action=receiving end is made a start standby main, sends K1=0xA0;
Wait state: send K1=0xA0.
In said method, described in automatically lock primary referring to:
There is primary fault (1/1/0) in described the first single-deck alarm, when standby fault (0/0/1) appears in described the second single-deck alarm, OLP is switched to primary, and remains on master state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP removes from locking master state, enters into other states.
In said method, described in automatically lock standby referring to:
There is primary fault (1/0/1) in described the first single-deck alarm, when standby fault (0/1/0) appears in described the second single-deck alarm, OLP is switched to standby, and remains on stand-by state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP removes from locking stand-by state, enters into other states.
The present invention makes when the receive direction of local terminal is protected switching action, and the sending direction of notice opposite end is protected switching action simultaneously, makes to receive and dispatch unified action, guarantees that business light signal is unimpeded all the time.
Accompanying drawing explanation
Fig. 1 is WDM/OTN transmission system figure in prior art;
Fig. 2 is the index path of OTU signal in OLP single-deck in prior art;
Fig. 3 is the optical structure chart of OLP single-deck inside in prior art;
Fig. 4 is the process chart of a kind of one to one two-way Optical Line Protection reverse method based on control command byte in the present invention;
Fig. 5 is the state transition figure of single-deck in the present invention;
Fig. 6 is first's schematic diagram that handling process is switched in the protection of optical link in the present invention;
Fig. 7 is the second portion schematic diagram that handling process is switched in the protection of optical link in the present invention;
Fig. 8 is the third part schematic diagram that handling process is switched in the protection of optical link in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention more cheer and bright, below in conjunction with embodiment and with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these descriptions are exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, omitted the description to known configurations and technology, to avoid unnecessarily obscuring concept of the present invention.The present invention based on WDM/OTN transmission system as shown in Figure 1, wherein the light path of OTU signal in OLP single-deck as shown in Figure 2, the optical structure chart of OLP single-deck inside as shown in Figure 3:
At transmitter side, from the signal of OSC-I, through 50:50 coupler, be divided into two, a part is from the output of PROT-O mouth, and another part sends to 1550/1510 wave multiplexer; 1550/1510 wave multiplexer closes the signal from OSC-I mouth and LINE-I mouth after ripple, from MAIN-O mouth, exports.
Receiver side, directly receives a receiver PIN1 from the signal of PROT-I mouth input, and PIN1 detects the luminous power of this port input, is used for judging that whether alternate channel is normal; From the signal of MAIN-I mouth input at first through 1550/1510 channel-splitting filter, isolate 1550 band signal and 1510 wavelength signals.1550 band signal and 1510 wavelength signals, more respectively by after coupler, are delivered to receiver (PIN3, PIN2) and output port (LINE-O, OSC-O) output separately.
A kind of one to one two-way Optical Line Protection reverse method based on control command byte provided by the invention as shown in Figure 4, comprises the following steps:
The luminous power that S1, the first single-deck detect according to PIN pipe is carried out the state of judgement work and protection circuit;
S2, the luminous power that detects when PIN pipe, lower than light drop-thresholds, report luminous power to lose alarm;
S3, according to luminous power, lose alarm state byte K2 is configured, and configure K1 byte and illustrate that the first single-deck and the second single-deck need the protection switching action of taking simultaneously;
S4, send above-mentioned K1, K2 byte to the second single-deck;
S5, the second single-deck are protected switching action accordingly according to the K1, the K2 byte that receive.
Described K1 byte representation the first single-deck and the second single-deck need the protection switching action of taking simultaneously;
Described K2 byte representation the first single-deck or corresponding optical switch operating state and the alarm of the second single-deck
State.
In described step 5, described the second single-deck is protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
After described step 5, also comprise:
K1, K2 byte that S6, described the second single-deck generate himself send to described the first single-deck;
S7, described the first single-deck receive K1, the K2 byte that described the second single-deck sends;
S8, described the first single-deck are protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
Before described step S4, also comprise:
Described the first single-deck receives webmaster and issues Artificial Control order, and enters Artificial Control pattern;
Described the first single-deck is protected switching action by receiving the K1 byte of webmaster or described the second single-deck transmission.
Wherein K1 byte representation local terminal and opposite end need the protection switching action of taking simultaneously, and high 4bit is fixed as 1010, and low 4bit is defined as follows:
| Action description | Bit3～bit0 | K1 byte | Explanation |
| Idle | 0000 | 0xA0 | ? |
| Manual Switch is to primary (both-end) | 0001 | 0xA1 | Control command |
| Auto switching, standby main | 0011 | 0xA3 | ? |
| Manual Switch is to standby (both-end) | 0010 | 0xA2 | Control command |
| Auto switching, main standby | 1100 | 0xAC | ? |
| Forced Switch is to primary (both-end) | 1010 | 0xAA | Control command |
| Forced Switch is to standby (both-end) | 0101 | 0xA5 | Control command |
| Automatically lock primary | 1001 | 0xA9 | ? |
| Automatically lock standby | 1101 | 0xAD | ? |
| Auto switching/removing is switched | 0110 | 0xA6 | Control command |
| Protection locking is primary | 1011 | 0xAB | Control command |
| Protection locking is standby | 0100 | 0xA4 | Control command |
Optical switch operating state and the alarm status of K2 byte representation local terminal, whether high 4bit is fixed as 1010, be mainly used in verification K2 byte and transmit correctly, bit3 represents that business is current in master state or stand-by state, low 3 represent respectively alarm status, and 0 is no alarm, and 1 for there being alarm.Each bit is defined as follows:
Under master state, the span of K2 is between 0xA8-0xAF, specific as follows:
Under stand-by state, the span of K2 is between 0xA0-0xA7, specific as follows:
Described K1, K2 byte and the protection switching action that need to take, the corresponding relation of operating state, alarm status is:
Init state: two ends acquiescence is all in master state, K2=0xA8, K1=0xA0;
Condition=(primary & & local terminal alarm 1/1/0 & & RevK1 unequal to 0xA9), action=receiving end is made a start main standby, sends K1=0xAC;
Condition=(primary & & local terminal alarm 0/0/0 or 1/1/0 & & RevK1=0xAC), action=receiving end is made a start main standby, sends K1=0xA0;
Condition=(primary & & local terminal alarm 0/0/1 & & RevK1=0xAC), action=send K1=0xA9, when receiving K1=0xA9, automatically lock primary;
Condition=(standby & & local terminal alarm 0/0/0 & & remote alarm 0/0/0), action=Wait-to-Restore, then after, receiving end is made a start and standby is fallen mainly, sends K1=0xA3;
Condition=(standby & & local terminal alarm 1/0/1 & & RevK1 unequal to 0xAD), action=receiving end is made a start standby main, sends K1=0xA3;
Condition=(standby & & local terminal alarm 0/0/0 & & RevK1=0xA3), action=receiving end is made a start standby main, sends K1=0xA0;
Condition=(standby & & local terminal alarm 0/1/0 & & RevK1=0xA3), sends K1=0xAD, when receiving K1=0xAD, automatically locks standby;
Condition=(standby & & local terminal alarm 1/1/1), action=receiving end is made a start standby main, sends K1=0xA0;
Wait state: send K1=0xA0.
According to the state transition figure of above-mentioned condition as shown in Figure 5:
Init state: two ends acquiescence is all in master state, K2=A8, K1=A0;
(1) kind situation in Fig. 5: condition=(primary & & local terminal alarm 1/1/0 & & RevK1 unequal to 0xA9), action=receiving end is made a start main standby, sends K1=0xAC;
(2) kind situation in Fig. 5: condition=(primary & & local terminal alarm 0/0/0 or 1/1/0 & & RevK1=0xAC), action=receiving end is made a start main standby, sends K1=0xA0;
(3) kind situation in Fig. 5: condition=(primary & & local terminal alarm 0/0/1 & & RevK1=0xAC), action=transmission K1=0xA9, when receiving K1=0xA9, automatically lock primary;
(4) kind situation in Fig. 5: condition=(standby & & local terminal alarm 0/0/0 & & remote alarm 0/0/0), action=Wait-to-Restore, then, receiving end is made a start standby main, sends K1=0xA3;
(5) kind situation in Fig. 5: condition=(standby & & local terminal alarm 1/0/1 & & RevK1 unequal to 0xAD), action=receiving end is made a start standby main, sends K1=0xA3;
(6) kind situation in Fig. 5: condition=(standby & & local terminal alarm 0/0/0 & & RevK1=0xA3), action=receiving end is made a start standby main, sends K1=0xA0;
(7) kind situation in Fig. 5: condition=(standby & & local terminal alarm 0/1/0 & & RevK1=0xA3), sends K1=0xAD, when receiving K1=0xAD, automatically locks standby;
(8) kind situation in Fig. 5: condition=(standby & & local terminal alarm 1/1/1), action=receiving end is made a start standby main, sends K1=0xA0;
Wherein, two special states are as described below:
(3) kind situation in Fig. 5: primary fault (1/1/0) appears in described the first single-deck alarm, when standby fault (0/0/1) appears in described the second single-deck alarm, OLP is switched to primary, and remains on master state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP could remove from locking master state, enter into other states.
(7) kind situation in Fig. 5:
There is primary fault (1/0/1) in described the first single-deck alarm, when standby fault (0/1/0) appears in described the second single-deck alarm, OLP is switched to standby, and remains on stand-by state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP could remove from locking stand-by state, enter into other states.
According to the protection of above-mentioned condition, switch flow process as shown in Fig. 6, Fig. 7 and Fig. 8:
Init state, sends K1=0xA0, K2=0xA8;
Before each action, first read the K1 of the opposite end of receiving, K2 byte, the K2 byte of local terminal, as the foundation of judgement;
The classification of judgement network management control order and the K1 byte of receiving:
Situation 1:
If network management control order is standby for forcing, carries out the main standby operation in sending and receiving end, and send K1=0xA5;
Judge whether to receive K2/bit3=0;
If so, send K1=0xA0;
Situation 2:
If the K1=0xA5 receiving, carries out the main standby operation in sending and receiving end, and sends K1=0xA0;
Situation 3:
If network management control order is main for forcing, carries out the main standby operation in sending and receiving end, and send K1=0xAA;
Judge whether to receive K2/bit3=1;
If so, send K1=0xA0;
Situation 4:
If receive K1=0xAA, carry out sending and receiving end by main operation, and send K1=0xA0;
Situation 5:
If whether network management control order for manually standby, judges local terminal is primary end, if not, K1=0xA0 sent;
If so, judge whether local terminal alarm is the K2=0xA8 of (0/0/0) and opposite end, if not, K1=0xA0 sent;
If so, carry out sending and receiving end main standby, and send K1=0xA2;
Judge whether to receive K2/bit3=0;
If it is send K1=0xA0, and revise local terminal alarm for (1/0/1), enter auto switching state;
Situation 6:
If receive K1=0xA2, judge whether local terminal is primary end, if not, send K1=0xA0;
If so, judge whether local terminal alarm is (0/0/0), if not, K1=0xA0 sent;
If so, carry out sending and receiving end main standby, and send K1=0xA0;
Revising local terminal alarm is (1/0/1), and enters auto switching state;
Situation 7:
If network management control order is the artificial master of falling, judge whether local terminal is standby end, if not, send K1=0xA0;
If so, judge whether local terminal alarm is the K2=0xA0 of (0/0/0) and opposite end, if not, K1=0xA0 sent;
If so, carry out the standby master of falling in sending and receiving end, and send K1=0xA1;
Judge whether to receive K2/bit3=1;
If it is send K1=0xA0, and revise local terminal alarm for (1/1/0), enter auto switching state;
Situation 8:
If receive K1=0xA1, judge whether local terminal is standby end, if not, send K1=0xA0;
If so, judge whether local terminal alarm is (0/0/0), if not, K1=0xA0 sent;
If so, carry out the standby master of falling in sending and receiving end, and send K1=0xA0;
Revising local terminal alarm is (1/1/0), and enters auto switching state;
Situation 9:
If network management control order, for protection locking, judges whether local terminal is primary end, if not, K1=0xA4 sent;
If so, send K1=0xAB;
Situation 10:
If receive K1=0xAB, judge whether local terminal is primary end, if not, carry out the standby master of falling in sending and receiving end, and send K1=0xA0;
If so, send K1=0xA0;
Situation 11:
If receive K1=0xA4, judge whether local terminal is standby end, if not, carry out sending and receiving end main standby, and send K1=0xA0;
If so, send K1=0xA0;
Situation 12:
If network management control order is switched or auto switching for removing, enter auto switching state.
In sum, compared with the existing technology, tool of the present invention has the following advantages:
When the receive direction of local terminal is protected switching action, the sending direction of notice opposite end is protected switching action simultaneously, makes to receive and dispatch unified action, guarantees that business light signal is unimpeded all the time.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, within all falling into protection scope of the present invention.
Claims (8)
1. one to an one two-way Optical Line Protection reverse method based on control command byte, is characterized in that, comprises step:
The luminous power that S1, the first single-deck detect according to PIN pipe is carried out the state of judgement work and protection circuit;
S2, the luminous power that detects when PIN pipe, lower than light drop-thresholds, report luminous power to lose alarm;
S3, according to luminous power, lose alarm state byte K2 is configured, and configure K1 byte and illustrate that the first single-deck and the second single-deck need the protection switching action of taking simultaneously;
S4, send above-mentioned K1, K2 byte to the second single-deck;
S5, the second single-deck are protected switching action accordingly according to the K1, the K2 byte that receive.
2. the method for claim 1, is characterized in that, described K1 byte representation the first single-deck and the second single-deck need the protection switching action of taking simultaneously; Described K2 byte representation the first single-deck or corresponding optical switch operating state and the alarm status of the second single-deck.
3. method as claimed in claim 1 or 2, is characterized in that, in described step 5, described the second single-deck is protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
4. method as claimed in claim 3, is characterized in that, after described step 5, also comprises:
K1, K2 byte that S6, described the second single-deck generate himself send to described the first single-deck;
S7, described the first single-deck receive K1, the K2 byte that described the second single-deck sends;
S8, described the first single-deck are protected switching action accordingly according to K1, the K2 byte of the K1 receiving, K2 byte and himself generation.
5. the method for claim 1, is characterized in that, before described step S4, also comprises:
Described the first single-deck receives webmaster and issues Artificial Control order, and enters Artificial Control pattern;
Described the first single-deck is protected switching action by receiving the K1 byte of webmaster or described the second single-deck transmission.
6. method as claimed in claim 3, is characterized in that, described K1, K2 byte and the protection switching action that need to take, and the corresponding relation of operating state, alarm status is:
Init state: two ends acquiescence is all in master state, K2=0x A8, K1=0x A0;
Condition=(primary & & local terminal alarm 1/1/0 & & RevK1 unequal to 0xA9), action=receiving end is made a start main standby, sends K1=0xAC;
Condition=(primary & & local terminal alarm 0/0/0 or 1/1/0 & & RevK1=0xAC), action=receiving end is made a start main standby, sends K1=0xA0;
Condition=(primary & & local terminal alarm 0/0/1 & & RevK1=0xAC), action=send K1=0xA9, when receiving K1=0xA9, automatically lock primary;
Condition=(standby & & local terminal alarm 0/0/0 & & remote alarm 0/0/0), action=Wait-to-Restore, then after, receiving end is made a start and standby is fallen mainly, sends K1=0xA3;
Condition=(standby & & local terminal alarm 1/0/1 & & RevK1 unequal to 0xAD), action=receiving end is made a start standby main, sends K1=0xA3;
Condition=(standby & & local terminal alarm 0/0/0 & & RevK1=0xA3), action=receiving end is made a start standby main, sends K1=0xA0;
Condition=(standby & & local terminal alarm 0/1/0 & & RevK1=0xA3), sends K1=0xAD, when receiving K1=0xAD, automatically locks standby;
Condition=(standby & & local terminal alarm 1/1/1), action=receiving end is made a start standby main, sends K1=0xA0;
Wait state: send K1=0xA0.
7. method as claimed in claim 6, is characterized in that, described in automatically lock primary referring to:
There is primary fault (1/1/0) in described the first single-deck alarm, when standby fault (0/0/1) appears in described the second single-deck alarm, OLP is switched to primary, and remains on master state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP removes from locking master state, enters into other states.
8. method as claimed in claim 6, is characterized in that, described in automatically lock standby referring to:
There is primary fault (1/0/1) in described the first single-deck alarm, when standby fault (0/1/0) appears in described the second single-deck alarm, OLP is switched to standby, and remains on stand-by state;
When primary light and the primary reference light of described the first single-deck and described the second single-deck all do not have in the situation of alarm, OLP removes from locking stand-by state, enters into other states.
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| WO2011140785A1 (en) * | 2010-05-14 | 2011-11-17 | 中兴通讯股份有限公司 | Multiplex section protection method and system in packet transport network |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108737159A (en) * | 2018-04-13 | 2018-11-02 | 烽火通信科技股份有限公司 | Processing method, system and the optical transfer network of configuration information in a kind of optical transfer network |
| CN108737159B (en) * | 2018-04-13 | 2021-05-14 | 烽火通信科技股份有限公司 | Method and system for processing configuration information in optical transport network and optical transport network |
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