CN1424825A - Shared test device and its control method for optical network link circuit connecting verification - Google Patents
Shared test device and its control method for optical network link circuit connecting verification Download PDFInfo
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- CN1424825A CN1424825A CN03114811A CN03114811A CN1424825A CN 1424825 A CN1424825 A CN 1424825A CN 03114811 A CN03114811 A CN 03114811A CN 03114811 A CN03114811 A CN 03114811A CN 1424825 A CN1424825 A CN 1424825A
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Abstract
A shared tester for authenticating the link connection of optical network features that a tester is arranged in each oxc node and all the links crossed by this OXC node can share this tester which is composed of a transmitter module with internal signaling insertion function, a receiver module with internal signaling extraction function, and a control software module. Its advantage is low cost.
Description
Technical field:
The present invention relates to a kind of shared testing equipment and control method thereof that is used for realizing the link connectivity verification between full Optical Switch Node, utilize the interleaving function of optical cross connect to make its of all link sharing or a spot of shared testing equipment, realize the in-band signalling transmission of the test post of link connectivity verification between the full Optical Switch Node.The present invention is applicable to the ASON of operation LMP Link Manager Protocol.
Technical background:
ASON (ASON) can be realized by introducing a distributed control plane: neighbours find, link management, and Topology Discovery, route is calculated, and dynamically foundation/dismounting connects, functions such as protection and recovery.At present, mainly carry out the standardization promotion: International Telecommunication Association (ITU-T), Intemet engineering duty group (IETF) and optical interconnection forum (OIF) by 3 tissues.Wherein, IETF has proposed the related protocol of neighbours' discovery and link management: LMP Link Manager Protocol (LMP).LMP belongs to the part of GMPLS (GMPLS) protocol family.
Between two adjacent optical cross connects (OXC) node, corresponding a plurality of ports link to each other by a plurality of wavelength links, these link bundlings (Bundle) form TE (Traffic Engineering) link together, annexation between artificial these ports of affirmation not only wastes time and energy, and is easy to make mistakes.The function of the Link Connectivity Verification (link connectivity verification) that LMP provides can realize internuncial checking of link physical and the relation that obtains TE Link (TE Link) and Interface ID (interface ID) automatically.But the link connectivity verification of LMP requires test post (Test message) transmitting the plane transmission and to receive (in-band signalling), and must all support by each port.Such requirement is not difficult to satisfy in the electron exchange node, for example, utilizes the trace byte J0 of SONET/SDH stage casing overhead part or the automatic neighbours of data communication channel to find scheme.But for full Optical Switch Node, all links are fully transparent, do not support the transmission and the reception of in-band signalling.Therefore how to realize at present that the internodal link connectivity verification function with full optical exchange structure remains a problem.
Summary of the invention:
The objective of the invention is to this problem of realization at the link connectivity verification function between adjacent full Optical Switch Node in the ASON (comprise and send the OXC node and receive the OXC node), on the basis that the LMP agreement is not changed, a kind of enforceable solution is proposed.
For realizing this purpose, the present invention proposes a kind of shared testing equipment and control method thereof, in each OXC, add one or a spot of testing equipment, all links that link to each other with OXC are shared this testing equipment by the interleaving function of OXC.Sharing testing equipment is made up of two hardware modules and Control Software module three parts: (1) has the sending module that in-band signalling inserts function; (2) has the receiver module of in-band signalling extract function; (3) control the state of sending module, receiver module and the Control Software module that concerns with the OXC interconnection thereof.Transmission in the testing equipment, receiver module adopt at the OXC intranodal reserves dedicated test port, the access way that send, receiver module inserts the OXC node by dedicated test port.The Control Software module is by adding transmission test request formation and acceptance test request queue respectively and it being controlled the scheduling that realizes shared testing equipment at transmission OXC node and reception OXC node.
Shared testing equipment of the present invention is shared and is used test port (test transmit port and test receiving port) by M.Sharing the sending module that has in-band signalling insertion function in the testing equipment is made of tunable laser, modulator and 1 * M optical switch.Two inputs of modulator link to each other with test post (Test message) transmitting terminal with the output of tunable laser respectively, the output of modulator links to each other with the input of 1 * M optical switch, and each output of 1 * M optical switch links to each other with each test transmit port of shared this sending module respectively.Receiver module with in-band signalling extract function is made of M:1 coupler (or M * 1 optical switch) and optoelectronic receiver.M test receiving port links to each other with each input port of M:1 coupler (or M * 1 optical switch) respectively, the output port of M:1 coupler (or M * 1 optical switch) and the input port of optoelectronic receiver link to each other, and the output port of optoelectronic receiver links to each other with Test message sink end.
Shared testing equipment of the present invention adopts at the OXC intranodal reserves test port, add and share testing equipment inserts OXC by dedicated test port cut-in method, have the sending module and the receiver module of structure as mentioned above by adding, add the Control Software module of sharing testing equipment again, can in the ASON of operation LMP Link Manager Protocol (LMP), realize link connectivity verification function.
The control method of shared testing equipment of the present invention is by adding the scheduling that transmission test request formation and acceptance test request queue realize sharing testing equipment respectively at transmission OXC node and reception OXC node.Control method is as described below respectively in the concrete implementation that sends OXC node and reception OXC node:
Sending the OXC node:
1. after certificate parameter (Begin Verify) process of consulting is finished in control plane, the LMP request transmits the plane and sends TEST message, and this request comprises send mode, Verify ID (checking label) and Local Interface ID (local interface label) parameter.This request is put into one send the test request formation, it is a request queue service that M test transmit port arranged here.
2. when shared test sending module has the free time, from send the test request formation, take out a request, according to its Local Interface ID, set up and share test sending module and the interconnection of testing a certain corresponding port of transmit port, set up the interconnection of test port and Local Interface ID corresponding port, and will share the test sending module and adjust to required state and be labeled as " doing " simultaneously.Then, shared testing equipment begins to send TEST message.
3. after the respective nodes of transmission OXC node in control plane received TestStatus (test mode) message, announcement was given and is transmitted the plane, responds a TestStatusAck (test mode affirmation) message by control channel.Remove relevant interconnection, the corresponding units of sharing in the test sending module is labeled as " spare time ".
Receiving the OXC node:
1. when the input port that links to each other with the link of invalidated has detected the light arrival, this port is put into an acceptance test request queue.Here also be that M test receiving port is a request queue service.
2. when shared test receiver module has the free time, from the acceptance test request queue, take out a request, set up the interconnection of itself and a certain corresponding test receiving port, the interconnection of setting up test port and receiver module, and this is shared test receiver module be labeled as " doing ".Then, shared testing equipment begins to read TEST message, and LMP is given in announcement.LMP returns TestStatus message according to TEST message by control channel and gives transmission OXC node.
3. after the respective nodes of reception OXC node in control plane received TestStatus message, announcement stopped to receive Test message for the transmission plane.Remove relevant interconnection, will share the test receiver module and be labeled as " spare time ".
The present invention has realized link connectivity verification function between full Optical Switch Node with lower cost on the basis that LMP agreement (LMP Link Manager Protocol) is not changed.Method of the present invention is applicable to the checking of multilink too.
Description of drawings:
Fig. 1 is a sending module structural representation in the shared testing equipment of the present invention.
As shown in Figure 1, sending module of the present invention has in-band signalling and inserts function, is made of tunable laser 1, modulator 2 and 1:M optical switch 3.The output port 6 of tunable laser 1 links to each other with the input port 5 of modulator 2, the input port 4 of modulator 2 links to each other with the Test message sending end, the output port 7 of modulator 2 links to each other with the input port 8 of 1 * M optical switch 3, and the M of 1 * M optical switch 3 output port 9 links to each other with each test transmit port of shared this sending module among the OXC respectively.
Fig. 2 shares the structural representation of receiver module in the testing equipment for the present invention.
As shown in Figure 2, receiver module of the present invention has the in-band signalling extract function, is made of M:1 coupler (or M * 1 optical switch) 10 and optoelectronic receiver 11.Each input port 12 of M:1 coupler (or M * 1 optical switch) 10 links to each other with each test receiving port of shared this receiver module among the OXC respectively, M:1 coupler (or M * 1 optical switch) 10 output port 13 links to each other with the input port 14 of optoelectronic receiver 11, and the output port 15 of optoelectronic receiver 11 links to each other with Test message sink end.
Fig. 3 is the OXC structural representation after the adding testing equipment in the embodiment of the invention.
As shown in Figure 3, testing equipment of the present invention is made of sending module 16 and receiver module 17 and Control Software module 20.Sending module 16 is shared the test transmit port by M and is used.Receiver module 17 is shared the test receiving port by M and is used.
Sending module 16 and receiver module 17 adopt at the OXC intranodal reserves test port, inserts the access way of OXC by dedicated test port.All keep the special-purpose test port of a pair of test on each N*N optical switch: test transmit port 18 and test receiving port 19.M test transmit port 18 links to each other with the output port 9 (i.e. the output port 9 of 1 * M optical switch 3) of sending module 16 in the shared testing equipment respectively, tests receiving port 19 for M and links to each other with the input port 12 (being the input port 12 of M:1 coupler (or M * 1 optical switch) 10) of receiver module 17 respectively.The input port 4 of sending module 16 (being the input port 4 of modulator in the sending module) links to each other with the Test message sending end, and the output port 15 of receiver module 17 (being the output port 15 of optoelectronic receiver 11 in the receiver module) links to each other with Test message sink end.Control Software module 20 be used to control sending module 16, receiver module 17 operating state and with the interconnection relation of OXC.
Embodiment:
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
In the present embodiment, adopt the access way among the present invention to add a testing equipment in the OXC of at present the most frequently used a kind of structure, the cut-in method and the present embodiment of a plurality of testing equipments are similar.Each OXC node has Nf to I/O optical fiber, and every optical fiber multiplexing number of wavelengths is M, and a testing equipment of adding is shared and used test port (test transmit port and test receiving port) by M, on each N*N optical switch a pair of test port is arranged all among the OXC.To the OXC of other structures, the cut-in method of sharing testing equipment can be with reference to present embodiment.
The OXC structure of a testing equipment of a kind of adding as shown in Figure 3, testing equipment is by sending module 16 and receiver module 17 and be used to control the state of sending module, receiver module and constitute with the Control Software module 20 of OXC interconnection relation.Wherein the composition structure of sending module 16, receiver module 17 respectively as shown in Figure 1 and Figure 2.The input port 4 of sending module 16 links to each other with the Test message sending end, and the output port 15 of receiver module 17 links to each other with Test message sink end.
In the present embodiment, share the control method of testing equipment by add the scheduling that transmission test request formation and acceptance test request queue realize sharing testing equipment respectively at transmission OXC node and reception OXC node.As described below respectively in the concrete implementation that sends OXC node and reception OXC node:
Sending the OXC node:
1. after certificate parameter (Begin Verify) process of consulting is finished in control plane, the LMP request transmits the plane and sends TEST message, and this request comprises send mode, Verify ID (checking label) and Local Interface ID (local interface label) parameter.This request is put into one send the test request formation, it is a request queue service that M test transmit port 18 arranged here.
2. when shared test sending module 16 has the free time, from send the test request formation, take out a request, according to its Local Interface ID, set up and share test sending module 16 and the interconnection of testing corresponding port in the transmit port 18, set up the interconnection of test port and Local InterfaceID corresponding port, and will share the tunable laser of testing in the sending module and adjust to required emission wavelength, simultaneously the unit in the sending module of using is labeled as " doing ".Then, shared testing equipment begins to send TEST message.
3. after the respective nodes of transmission OXC node in control plane received TestStatus message, announcement was given and is transmitted the plane, responds a TestStatusAck message by control channel.Remove relevant interconnection, the corresponding units of sharing in the test sending module 16 is labeled as " spare time ".Receiving the OXC node:
1. when the input port that links to each other with the link of invalidated has detected the light arrival, this port is put into an acceptance test request queue.Here also be that M test receiving port 19 is a request queue service.
2. when sharing the test receiver module during 17 free time, from the acceptance test request queue, take out a request, set up the interconnection of itself and corresponding test receiving port 19, if what device 10 adopted in the receiver module 17 is the MX1 optical switch, adjust its interconnection state, and this shared test receiver module 17 is labeled as " doing ".Then, shared testing equipment begins to read TEST message, and LMP is given in announcement.LMP returns TestStatus message according to TEST message by control channel and gives transmission OXC node.
3. after the respective nodes of reception OXC node in control plane received TestStatus message, announcement stopped to receive Test message for the transmission plane.Remove relevant interconnection, will share test receiver module 17 and be labeled as " spare time ".
The proof procedure and the said process of multilink are similar.
Claims (2)
1, a kind of shared testing equipment of optical network link connectivity verification, it is characterized in that by sending module (16) with in-band signalling insertion function, receiver module (17) and Control Software module (20) with in-band signalling extract function are formed, sending module (16) is by tunable laser (1), modulator (2) and 1 * M optical switch (3) constitute, receiver module (17) is made of M:1 coupler (10) and optoelectronic receiver (11), sending module (16) and receiver module (17) insert optical cross connect OXC node by dedicated test port, or pass through road port access OXC up and down, realize sending module (16) by Control Software module (20), receiver module (17) and the State Control that concerns with the OXC interconnection thereof.
2, a kind of control method of the shared testing equipment as the said optical network link connectivity verification of claim 1, it is characterized in that by adding respectively and send test request formation and acceptance test request queue and it is controlled the scheduling that realizes sharing testing equipment sending the OXC node and receive the OXC node, send the OXC node and receive the implementation of OXC node as follows respectively:
Sending the OXC node:
After the certificate parameter negotiations process is finished in control plane, LMP Link Manager Protocol LMP request transmits the plane and sends test post, this request comprises send mode, checking label and local interface label parameter, this request is put into one send the test request formation;
When shared test sending module has the free time, from send the test request formation, take out a request, according to its local interface label, set up and share test sending module and the interconnection of testing a certain corresponding port of transmit port, set up the interconnection of test transmit port and local interface label corresponding port, and will share the test sending module and adjust to required state and be labeled as " doing " simultaneously, then, shared testing equipment begins to send test post;
After the respective nodes of transmission OXC node in control plane received test mode message, announcement is given and is transmitted the plane, respond a test mode acknowledge message by control channel, remove relevant interconnection, the corresponding units of sharing in the test sending module is labeled as " spare time ";
Receiving the OXC node:
When the input port that links to each other with the link of invalidated has detected the light arrival, this port is put into an acceptance test request queue;
When shared test receiver module has the free time, from the acceptance test request queue, take out a request, set up the interconnection of itself and a certain corresponding test receiving port, set up the interconnection of test port and receiver module, and this is shared test receiver module be labeled as " doing ", then, shared testing equipment begins to read test post, LMP is given in announcement, and LMP returns test mode message according to test post by control channel and gives transmission OXC node;
After the respective nodes of reception OXC node in control plane received test mode message, announcement stopped acceptance test message for the transmission plane, removes the interconnection of being correlated with, and will share the test receiver module and be labeled as " spare time ".
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| CN03114811A CN1424825A (en) | 2003-01-09 | 2003-01-09 | Shared test device and its control method for optical network link circuit connecting verification |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452683C (en) * | 2003-12-04 | 2009-01-14 | 上海交通大学 | Intelligent wavelength routing optical network node structure supporting link management protocol |
| CN108061937A (en) * | 2017-12-22 | 2018-05-22 | 中国科学院半导体研究所 | A kind of multimode optical switching structure for link switching |
| CN108111930A (en) * | 2017-12-15 | 2018-06-01 | 中国人民解放军国防科技大学 | Multi-bare-chip high-order optical switching structure based on high-density memory |
| CN108667548A (en) * | 2018-05-14 | 2018-10-16 | 烽火通信科技股份有限公司 | A kind of automated testing method and system based on ASON signaling networks |
| CN108667510A (en) * | 2018-05-14 | 2018-10-16 | 烽火通信科技股份有限公司 | The preset routing automated testing method of multipath based on ASON and system |
-
2003
- 2003-01-09 CN CN03114811A patent/CN1424825A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452683C (en) * | 2003-12-04 | 2009-01-14 | 上海交通大学 | Intelligent wavelength routing optical network node structure supporting link management protocol |
| CN108111930A (en) * | 2017-12-15 | 2018-06-01 | 中国人民解放军国防科技大学 | Multi-bare-chip high-order optical switching structure based on high-density memory |
| CN108061937A (en) * | 2017-12-22 | 2018-05-22 | 中国科学院半导体研究所 | A kind of multimode optical switching structure for link switching |
| CN108667548A (en) * | 2018-05-14 | 2018-10-16 | 烽火通信科技股份有限公司 | A kind of automated testing method and system based on ASON signaling networks |
| CN108667510A (en) * | 2018-05-14 | 2018-10-16 | 烽火通信科技股份有限公司 | The preset routing automated testing method of multipath based on ASON and system |
| CN108667510B (en) * | 2018-05-14 | 2019-09-17 | 烽火通信科技股份有限公司 | The preset routing automated testing method of multipath based on ASON and system |
| CN108667548B (en) * | 2018-05-14 | 2019-11-19 | 烽火通信科技股份有限公司 | A kind of automated testing method and system based on ASON signaling network |
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