CN1514565A - City region interleave multiplex system photo monitoring channel - Google Patents
City region interleave multiplex system photo monitoring channel Download PDFInfo
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- CN1514565A CN1514565A CNA03141401XA CN03141401A CN1514565A CN 1514565 A CN1514565 A CN 1514565A CN A03141401X A CNA03141401X A CN A03141401XA CN 03141401 A CN03141401 A CN 03141401A CN 1514565 A CN1514565 A CN 1514565A
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Abstract
Characters of the channel are that it contains a hardware platform, a dedicated control protocol based on the said hardware platform, and Ethernet link based on the dedicated protocol. The hardware platform includes net element of wavelength division multiplexing, network processor, Ethernet exchanger in two layers. The Ethernet exchanger contains two electrical interfaces and two optical interfaces of Ethernet. The invention possesses features of high channel rate, transmitting both monitoring and managing information, the control protocol adaptive to change of network topology quickly, automatic protecting fault such as breaking disconnection of optical fiber, restraining broadcast storm, short convergence time and good stability.
Description
Technical field:
The present invention relates to optical fiber communication, the Optical Supervisory Channel of particularly a kind of metropolitan area wavelength-division multiplex system has proposed in a kind of new Metro WDM system monitoring management information transferring method between the network element.
Background technology:
Wavelength division multiplexing (WDM) technology has obtained in the whole world using widely, and it is a broadband low loss characteristic of utilizing monomode fiber, adopts a plurality of wavelength to make carrier wave, allows the transmission simultaneously in optical fiber of each carrier channel.Compare with single-channel system, wavelength division multiplexing has not only greatly improved the message capacity of network system, has made full use of bandwidth of an optical fiber, and it has plurality of advantages such as dilatation is simple, dependable performance, particularly it can directly insert multiple business, and its application prospect is very bright.
Dense wave division multipurpose in the wavelength-division multiplex technique (DWDM) transmission system has been widely used in the middle of the construction of long-distance backbone network, made up on this basis towards the information application system of miscellaneous service and application, and in metropolitan area and Access Network, because fancy price makes it can not obtain the advantage on transmission capacity and transmission range that this technology is brought before the DWDM equipment, and Coarse Wavelength Division Multiplexing (CWDM) transmission system has solved this difficult problem with its good cost performance, has obtained extensive use.
General channel in the distant wavelength-division multiplex transmission system by 2Mbps, monitor message about adopting between time-multiplexed method each network element device in network, adopting the low-rate channel transmission mainly is to consider to make the sensitivity of receiver higher, the maximum transmission distance that can provide enough optical power budget values to cover professional main signal like this, network management information then are to transmit by the channel outside the system.Because the distance between metropolitan area scope interior nodes is not long, usually less than 100 kilometers, therefore by the channel of 10/100Mbps, the ripe ethernet technology of employing transmits monitoring simultaneously and management information is to realize the solution simple more, that cost is lower.
Adopt Ethernet to realize Optical Supervisory Channel, the problem of broadcast storm when also existing network topology to form loop.IEEE has formulated the Spanning-Tree Protocol (Spanning Tree) of 802.1d, and this agreement guarantees between at any time any 2 of the network communication path is arranged all, can eliminate the duplicate paths that may exist between any 2 in the network topology simultaneously.
Several problems below but the 802.1d Spanning-Tree Protocol exists:
1. convergence time is long, and according to the algorithm of 802.1d, the initialization time of each leaf node was about for 30 seconds, and the convergence of whole topology will be about 45 seconds.
2. network topology causes overall situation fluctuation easily, because the theory of 802.1d does not have the notion in territory, the change of user's increase or minimizing, equipment disposition tends to cause overall unnecessary fluctuation in the network.
Summary of the invention:
The technical problem to be solved in the present invention provides a kind of metropolitan area wavelength division multiplexing Optical Supervisory Channel in the problem that the Spanning-Tree Protocol that overcomes above-mentioned 802.1d exists, and safeguards whole communication network with this, guarantees can normally move when network breaks down and topology changes.When the WDM network element was formed point-to-point application scenario, the OSC channel constituted point-to-point link; When the WDM network element was formed looped network, the OSC channel is the looping topology also, and this moment, special-purpose control protocol can suppress the broadcast storm generation, at aspects such as convergence time and stability, and can the fine requirement of satisfying metropolitan area wave division multiplexing transmission system OSC channel.
Technical solution of the present invention is as follows:
A kind of metropolitan area wavelength-division multiplex system Optical Supervisory Channel is characterized in that it comprises that a hardware platform and one group are based on the special-purpose control protocol of this hardware platform and adopt the ethernet link of this special use control protocol.
Described hardware platform comprises the wavelength division multiplexing network element, network processing unit, the Ethernet Layer 2 switch, this Ethernet switch two electrical interfaces and two Ethernet optical interfaces are arranged, its position relation is: this network processing unit is from the Information Monitoring of wavelength-division multiplex system network element, an Ethernet electrical interface by switch is directly inputted to the Ethernet Layer 2 switch, the data of this Ethernet Layer 2 switch output have three direction of transfers: i.e. east orientation Ethernet optical interface, the west is to Ethernet optical interface and another one Ethernet electrical interface, equally from east orientation Ethernet optical interface, the west is after the webmaster managing configuration information that Ethernet optical interface or Ethernet electrical interface are come is input to Layer 2 switch, output to the Ethernet electrical interface, network processing unit just can receive the managing configuration information of webmaster like this, thereby realizes the administration configuration to the wavelength division multiplexing network element.
The processing procedure of the special-purpose control protocol that metropolitan area of the present invention wavelength-division multiplex system Optical Supervisory Channel is adopted is as follows:
1.. after powering on, the webmaster computer judges whether to be looped network, if do not form looped network, the east orientation of Optical Supervisory Channel, west enable effectively and withdraw from handling process to optical interface;
2.. when being looped network, judge whether network element again into ROOT?
3.. if not the ROOT net then enters non-ROOT net handling process;
4.. if the ROOT net then enters ROOT net handling process.
Described non-ROOT net handling process comprises:
1.. when judging that this network element is non-ROOT network element, then east, the west with Optical Supervisory Channel enables effectively to optical interface;
2.. whether receive ROOT network element broadcast message; Do not receive outputting alarm information then, the undefined ROOT network element of current whole looped network;
3.. receive the network element broadcast message, then refresh ROOT network element MAC, IP address information, and regularly send the online information of this network element to the ROOT network element;
4.. monitor in the network element broadcast message whether link failure information is arranged, have, then send the link failure warning information to the ROOT network element, and the chain circuit alarming light direction is enabled invalid;
5.. monitor in the network element broadcast message whether link failure recovery information is arranged, have, then send link failure recovery information, and the link-recovery light direction is enabled effectively to the ROOT network element.
Described ROOT net handling process is as follows:
1.. when judging that this network element is the ROOT network element, then the east orientation optical interface of Optical Supervisory Channel enables effectively, and timed sending ROOT net broadcast message;
2.. the link failure warning information is arranged, and then the west of Optical Supervisory Channel enables effectively to optical interface;
3.. link failure recovery information is arranged, and the east orientation optical interface that then recovers Optical Supervisory Channel enables effectively.
Technique effect of the present invention:
Metropolitan area of the present invention wavelength-division multiplex system Optical Supervisory Channel comprises that a hardware platform and one group are based on the self-defining special-purpose control protocol of this hardware platform.Compare with existing structure; this new O SC adapts to the wave division multiplexing transmission system in the metropolitan area scope more; because channel speed improves; it can transmit the monitoring and the management information of network element simultaneously; special-purpose simultaneously control protocol makes it can adapt to the situation of network topology change rapidly; can protect automatically faults such as optical fiber open circuit rapidly, this OSC also supports to transmit by other channels outside DCN or the system.
Description of drawings:
Fig. 1 is the hardware platform structural representation of metropolitan area of the present invention wavelength-division multiplex system Optical Supervisory Channel.
Fig. 2 is an OSC looped network normal condition schematic diagram of the present invention.
Fig. 3 is that the link failure schematic diagram appears in OSC looped network of the present invention.
Fig. 4 is an OSC loop network link fault recovery schematic diagram of the present invention.
Fig. 5 is the special-purpose control protocol process chart of OSC ROOT network element of the present invention.
Fig. 6 is the special-purpose control protocol process chart of the non-ROOT network element of OSC of the present invention.Among the figure:
1-WDM network element 2-network processing unit 3-west is to the Ethernet optical interface
4-Ethernet Layer 2 switch 5-east orientation Ethernet optical interface 6-Ethernet electrical interface
7-network processing unit control signal 8-Ethernet electrical interface 9-Ethernet light signal
11,12,13,14-OSC loop network element 15-webmaster computer
16-UTP category-5 cable 17-OSC loop
Embodiment:
Metropolitan area of the present invention wavelength-division multiplex system Optical Supervisory Channel comprises that a hardware platform and one group are based on the special-purpose control protocol of this hardware platform and adopt the ethernet link of this special use control protocol.
Fig. 1 is the hardware platform of metropolitan area of the present invention wavelength-division multiplex system Optical Supervisory Channel, as seen from Figure 1, this hardware platform comprises wavelength division multiplexing network element 1, network processing unit 2, Ethernet Layer 2 switch 4, this Ethernet Layer 2 switch 4 two too net electrical interfaces 6 are arranged, 8, its output has two Ethernet optical interfaces 3,5, this network processing unit 2 is from 1 Information Monitoring of wavelength-division multiplex system network element, be directly inputted to Ethernet Layer 2 switch 4 by an Ethernet electrical interface 8, the data of these Layer 2 switch 4 outputs have three direction of transfers: east orientation Ethernet optical interface 5, the west is to Ethernet optical interface 3 and another one Ethernet electrical interface 6, network processing unit 2 receives the ethernet frame of two layers of switching network of Ethernet simultaneously, for destination address is local ethernet frame, network processing unit 2 receives and handles, and network processing unit 2 is by control signal 7 control WDM network element devices.
Two osc light directions all adopt the 1310nm wavelength.
Be placed near the local network element situation for webmaster, as shown in Figure 2, webmaster computer 15 can connect Ethernet electrical interface 6 by netting twine 16, and webmaster not only can be managed local network element like this, to 3 two Ethernet optical interfaces, webmaster also can be managed remote network element by east orientation 5, west.Like this, WDM management and monitoring information channel OSC just can set up by two layers of switching network of Ethernet.
The problem that adopts special-purpose control protocol to solve broadcast storm is mentioned in the front, in order to make the normally stable operation of special-purpose control protocol, after the WDM network element device powers on, before special-purpose control protocol was moved, the east orientation of OSC, west all were to be in the invalid state that enables to two optical interfaces 5,3.
Each WDM network element 11,12,13,14 equipment is to having a MAC Address, an IP address and two property values, and these two property values are respectively RINGinformation and ROOTinformation;
MAC Address and IP address are used for network address identification;
RINGinformation represents whether current OSC network is looped network, whether moves special-purpose control protocol in order to the decision current network;
ROOTinformation represents whether network element is the ROOT network element, and for ROOT network element and non-ROOT network element, special-purpose control protocol has different handling processes, and whole OSC looped network has and have only a ROOT network element.
Fig. 5 is the special-purpose control protocol process chart of ROOT network element.
After the device power, special-purpose control protocol software detects the RINGinformation property value at first, if being OSC, property value do not form looped network, then the east orientation of OSC, west enable effectively to optical interface, owing to do not form looped network, so do not need to move special-purpose control protocol, thereby withdraw from special-purpose control protocol handling process.
If detect is to form looped network, judges further then whether this network element is the ROOT network element, if right and wrong ROOT network element, then program forwards non-ROOT network element handling process to.If the ROOT network element, then the EAST light direction with the OSC channel enables effectively.Simultaneously as the ROOT network element, the timed sending broadcast message is notified MAC Address, the IP address of other network equipment network element on two layers of switching network.Whether the ROOT network element is monitored simultaneously link failure information, if having, then the WEST light direction is enabled effectively.The ROOT network element after receiving link-recovery information, then with the WEST light direction enable invalid.To guarantee that whole network reverts to initial condition.
Fig. 6 is the special-purpose control protocol process chart of non-ROOT network element.
For non-ROOT network element, when judging that this network element is non-ROOT network element, two light directions in east, west of OSC are enabled effectively.Receive the ROOT network element broadcast message on two layers of exchanging network, refresh MAC, the IP address information of ROOT network element.If do not receive broadcast message, then export fault message, show in the current whole looped network not define the ROOT network element.After receiving broadcast message, regularly to the ROOT network element broadcast this network element online information (MAC, IP).When this network element detects link failure (EAST or WEST light direction) information, send link failure information to the ROOT network element, it is invalid at that time the light direction link of correspondence to be enabled.When network element detects link-recovery information, send link-recovery information to the ROOT network element, will recover the light direction link simultaneously and enable effectively.Important traffic part (as fault, recovering etc.) to the design of ROOT network element and non-ROOT network element has increased and has replied affirmation mechanism, stable, reliable with guarantee agreement.
Fig. 2, Fig. 3 and Fig. 4 represent OSC loop network link normal condition of the present invention respectively, break down and recover normal schematic diagram.
Claims (5)
1, a kind of metropolitan area wavelength-division multiplex system Optical Supervisory Channel is characterized in that it comprises that a hardware platform and one group are based on the special-purpose control protocol of this hardware platform and adopt the ethernet link of this special use control protocol.
2, metropolitan area according to claim 1 wavelength-division multiplex system Optical Supervisory Channel, it is characterized in that described hardware platform comprises wavelength division multiplexing network element (1), network processing unit (2), Ethernet Layer 2 switch (4), this Ethernet switch (4) has two electrical interfaces (6,8) and two Ethernet optical interfaces (3,5), its working procedure is: this network processing unit (2) is from wavelength-division multiplex system network element (1) Information Monitoring, be directly inputted to Ethernet Layer 2 switch (4) by Ethernet electrical interface (8), the data of this Ethernet Layer 2 switch (4) output have three direction of transfers: i.e. east orientation Ethernet optical interface (5), the west is to Ethernet optical interface (3) and Ethernet electrical interface (6), equally from east orientation Ethernet optical interface (5), the west is after the webmaster managing configuration information that Ethernet optical interface (3) or Ethernet electricity mouthful (6) is come is input to Layer 2 switch (4), output to Ethernet electrical interface (8), network processing unit just can receive the managing configuration information of webmaster like this, thereby realizes the administration configuration to wavelength division multiplexing network element (1).
3, metropolitan area according to claim 2 wavelength-division multiplex system Optical Supervisory Channel is characterized in that the processing procedure of described special-purpose control protocol is as follows:
1.. after powering on, webmaster computer (5) judges whether to be looped network, if do not form looped network, the east orientation of Optical Supervisory Channel, west enable effectively and withdraw from handling process to optical interface;
2.. when being looped network, judge whether network element again into ROOT?
3.. if not the ROOT net then enters non-ROOT net handling process;
4.. if the ROOT net then enters ROOT net handling process.
4, metropolitan area according to claim 3 wavelength-division multiplex system Optical Supervisory Channel is characterized in that described non-ROOT net handling process is as follows:
1.. when judging that this network element is non-ROOT network element, then east, the west with Optical Supervisory Channel enables effectively to optical interface;
2.. whether receive ROOT network element broadcast message; Do not receive outputting alarm information then, the undefined ROOT network element of current whole looped network;
3.. receive the network element broadcast message, then refresh ROOT network element MAC, IP address information, and regularly send the online information of this network element to the ROOT network element;
4.. monitor in the network element broadcast message whether link failure information is arranged, have, then send the link failure warning information to the ROOT network element, and the chain circuit alarming light direction is enabled invalid;
5.. monitor in the network element broadcast message whether link failure recovery information is arranged, have, then send link failure recovery information, and the link-recovery light direction is enabled effectively to the ROOT network element.
5, metropolitan area according to claim 3 wavelength-division multiplex system Optical Supervisory Channel is characterized in that described ROOT net handling process is as follows:
1.. when judging that this network element is the ROOT network element, then the east orientation optical interface of Optical Supervisory Channel enables effectively, and timed sending ROOT net broadcast message;
2.. the link failure warning information is arranged, and then the west of Optical Supervisory Channel enables effectively to optical interface;
3.. link failure recovery information is arranged, and the east orientation optical interface that then recovers Optical Supervisory Channel enables effectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03141401XA CN1514565A (en) | 2003-07-04 | 2003-07-04 | City region interleave multiplex system photo monitoring channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03141401XA CN1514565A (en) | 2003-07-04 | 2003-07-04 | City region interleave multiplex system photo monitoring channel |
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| CN1514565A true CN1514565A (en) | 2004-07-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314230C (en) * | 2005-05-18 | 2007-05-02 | 烽火通信科技股份有限公司 | Method for transferring alarm information of net element in use for optical transmission network |
| WO2008009188A1 (en) * | 2006-07-13 | 2008-01-24 | Zte Corporation | A device of realizing optical supervisory channel information transmission and a system and method thereof |
| CN100394740C (en) * | 2006-05-08 | 2008-06-11 | 杭州华三通信技术有限公司 | Method for transmitting control message and a station apparatus |
| CN101610128B (en) * | 2008-06-20 | 2013-03-27 | 中兴通讯股份有限公司 | Method for realizing fast route convergence by optical transport network (OTN) overheads |
| CN104125009A (en) * | 2014-07-24 | 2014-10-29 | 华中科技大学 | Underwater remote control communication network |
-
2003
- 2003-07-04 CN CNA03141401XA patent/CN1514565A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314230C (en) * | 2005-05-18 | 2007-05-02 | 烽火通信科技股份有限公司 | Method for transferring alarm information of net element in use for optical transmission network |
| CN100394740C (en) * | 2006-05-08 | 2008-06-11 | 杭州华三通信技术有限公司 | Method for transmitting control message and a station apparatus |
| WO2008009188A1 (en) * | 2006-07-13 | 2008-01-24 | Zte Corporation | A device of realizing optical supervisory channel information transmission and a system and method thereof |
| CN101610128B (en) * | 2008-06-20 | 2013-03-27 | 中兴通讯股份有限公司 | Method for realizing fast route convergence by optical transport network (OTN) overheads |
| CN104125009A (en) * | 2014-07-24 | 2014-10-29 | 华中科技大学 | Underwater remote control communication network |
| CN104125009B (en) * | 2014-07-24 | 2017-01-11 | 华中科技大学 | Underwater remote control communication network |
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