CN112583474A - Optical network multi-path fast switching system and method - Google Patents
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Abstract
The invention discloses a multi-path fast switching system and a method of an optical network, comprising an input end network device, an output end network device and N service paths; the service data is input by an input port of the input end network equipment; the N service paths are connected between an output port of the input end network equipment and an input port of the output end network equipment, wherein 1 network line is a working path, and the rest at least M network lines are protection paths and have three working modes of static, dynamic and static combination; the service data is output by an output port of the output-side network device. The invention can realize uninterrupted service communication when the network line has one-degree, two-degree or even multiple faults, and can ensure that the path switching time meets the requirement of a carrier grade of 50 ms. The invention can be widely used in the optical network, greatly improves the reliability and the survivability of the optical network, solves the problem of service interruption when the current line has more than one-degree fault, and effectively improves the reliability of the network.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a multi-path fast switching system and method for an optical network.
Background
The existing communication device LSP (Label Switch Path) protection is generally 1: 1,1+1,1: n, there is only one protection path in such a protection scheme, which only supports one-degree fault of the line, but cannot support more than one-degree fault of the line. When the working path has a fault (a fault at one time), the working path is switched to a protection path, and when the protection path has a fault (a fault at more than one time), the existing LSP protection scheme has no function, the service is interrupted, and the service can be recovered to be normal only after the line fault is eliminated.
Disclosure of Invention
The invention aims to solve the problem that the existing communication equipment LSP only supports one-time failure, and provides an optical network multi-path fast switching system and method.
In order to solve the problems, the invention is realized by the following technical scheme:
a multi-path fast switching system of an optical network comprises input end network equipment, output end network equipment and N service paths; the service data is input by an input port of the input end network equipment; the N service paths are connected between the output port of the input end network equipment and the input port of the output end network equipment; wherein, the 1+ M service paths are positioned in a tunnel protection group of the system, and 1 service path in the tunnel protection group of the system is a working path; the N- (1+ M) service paths are positioned outside a tunnel protection group of the system; the service data is output by an output port of the output end network equipment; the service data is output by an output port of the output end network equipment; m and N are positive integers, N is more than or equal to M +1, and M is more than or equal to 1.
The N traffic paths have different weights.
The M service paths are static service paths or dynamic service paths, wherein the weight of the static service paths is always higher than that of the dynamic protection paths.
The working modes of the system comprise a static working mode, a dynamic working mode or a dynamic and static combined working mode:
firstly, defining that M service paths of a tunnel protection group of a system comprise 1 initial working path and M static protection paths in a static working mode; when the current working path has a fault, the service path in the tunnel protection group of the system is kept unchanged, and the working path between the output port of the input end network equipment and the input port of the output end network equipment is switched to a static protection path which has no fault and has a priority weight next to the current working path;
defining that M service paths of a tunnel protection group of the system comprise 1 initial working path and M dynamic protection paths in a dynamic working mode; when the current working path fails, the current working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as a dynamic protection path, the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched to a dynamic protection path which is not failed next to the current working path and has a priority weight;
defining that M service paths of a tunnel protection group of the system comprise 1 initial working path, L static protection paths and M-L dynamic working paths in a dynamic and static combined working mode;
when the current working path has a fault and is the initial working path or the static protection path with the highest weightness, the service path in the tunnel protection group of the system is kept unchanged, and the working path between the output port of the input end network device and the input port of the output end network device is switched to the next static protection path which has no fault and has a priority weighting;
when the current working path has a fault and the current working path is a static protection path with the highest weight, the initial working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as a dynamic protection path, and the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched into the dynamic protection path with the highest weight;
when the current working path has a fault and is a dynamic protection path, the current working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as the dynamic protection path, and the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched to a dynamic protection path which is next to the current working path, has no fault and has a priority weight;
wherein M and L are positive integers, M is more than L, and L is more than or equal to 1.
In order to ensure that the switching time meets the requirements of the carrier class, the current working path and the next working path to be switched are simultaneously positioned in an APS protection group of the system.
In a static working mode, a dynamic working mode or a dynamic and static combined working mode, when a line fault is recovered, the initial working path is switched back preferentially between the output port of the input end network equipment and the input port of the output end network equipment, and the protection path is switched back according to the weight.
Compared with the prior art, the invention can realize uninterrupted service communication when the network line has one-degree, two-degree or even multiple faults, and can ensure that the path switching time meets the requirement of carrier grade 50 ms. The invention can be widely used in the optical network, greatly improves the reliability and the survivability of the optical network, solves the problem of service interruption when the current line has more than one-degree fault, and effectively improves the reliability of the network.
Drawings
Fig. 1 is a schematic diagram of a multi-path fast switching system of an optical network.
Fig. 2 is a schematic diagram of a static operation mode of a multi-path fast switching system of an optical network.
Fig. 3 is a schematic diagram of a dynamic operation mode of a multi-path fast switching system of an optical network.
Fig. 4 is a schematic diagram of a dynamic and static combination working mode of a multi-path fast switching system of an optical network.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to specific examples.
For simplicity of description, we use 3: 1 optical network multi-path fast switching system (i.e. 3 protection paths and 1 working path) is taken as an example for explanation, and we can easily realize N: 1 optical network multi-path fast switching system (i.e. N protection paths and 1 working path).
An optical network multi-path fast switching system (3: 1 optical network multi-path fast switching system) as shown in fig. 1 comprises an input end network device, an output end network device and more than 4 service paths. The service data is input by an input port of the input-side network device. More than 4 traffic paths are connected between the output port of the input side network device and the input port of the output side network device. In the N service paths, 4 service paths are located in a tunnel protection group of the system, wherein 1 service path is a working path, the remaining 3 service paths are protection paths, and the 3 protection paths are provided with different weights. The service data is output by an output port of the output-side network device.
In the following 3: 1, in the optical network multi-path fast switching system, the service enters the port of the input end network device from the port and is transmitted to the port of the output end network device. There are 4 traffic paths between the ingress network device and the egress network device, LSP1, LSP2, LSP3, and LSP4, respectively. The 4 traffic paths are all located in a tunnel protection group of the system, wherein LSP1 is an initial working path, LSP2, LSP3 and LSP4 are 3 protection paths, and the 3 protection paths perform switching protection according to the weights set by the system. The 3 protection paths can be defined as static protection paths and/or dynamic protection paths, and when the protection paths are static protection paths, the protection paths are statically located in the tunnel protection group of the system, and when the protection paths are dynamic protection paths, the protection paths are dynamically located in the tunnel protection group of the system. The weight of each protection path can be set manually, or calculated according to the real-time link quality (bandwidth, jitter, time delay, etc.) of the service path, and the weight of the protection path with good link quality is prioritized, and the weight of the static protection path is higher than that of the dynamic protection path.
The above 3: 1 an optical network multi-path fast switching method implemented by an optical network multi-path fast switching system, the working mode of which comprises: the static working mode, the dynamic working mode and the static and dynamic combined working mode are three types:
(1) and (3) a static working mode:
initially, the traffic path LSP1 is an initial working path, the traffic paths LSP2, LSP3 and LSP4 are static protection paths, when the traffic paths LSP1, LSP2, LSP3 and LSP4 are in a tunnel protection group of the system, and the traffic paths LSP1 and LSP2 are in an APS protection group of the system (see fig. 2 a).
When the current working path LSP1 fails, the output port of the input-side network device and the input port of the output-side network device switch to the traffic path LSP2, so that the traffic path LSP2 becomes the working path, at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in the tunnel protection group of the system, and the traffic paths LSP2 and LSP3 are in the APS protection group of the system (see fig. 2 b).
When the current working path LSP2 fails, the output port of the input-side network device and the input port of the output-side network device switch to the traffic path LSP3, so that the traffic path LSP3 becomes a working path, at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in the tunnel protection group of the system, and the traffic paths LSP3 and LSP4 are in the APS protection group of the system (see fig. 2 c).
When the current working path LSP3 fails, the output port of the input-side network device and the input port of the output-side network device switch to the traffic path LSP4, so that the traffic path LSP4 becomes the working path, at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in the tunnel protection group of the system, and the traffic paths LSP4 and LSP1 are in the APS protection group of the system (see fig. 2 d).
When the line fault is recovered, the output port of the input end network equipment and the input port of the output end network equipment are switched back to the initial working path preferentially, and the protection path is switched back according to the weight.
In the static operation mode, the 4 traffic paths of the traffic paths LSP1, LSP2, LSP3 and LSP4 are always in the tunnel protection group of the system. Thus, the service can realize 3-degree fault protection of the line.
(2) And (3) dynamic working mode:
initially, the traffic path LSP1 is an initial working path, the traffic paths LSP2, LSP3 and LSP4 are dynamic protection paths, when the traffic paths LSP1, LSP2, LSP3 and LSP4 are in a tunnel protection group of the system, and the traffic paths LSP1 and LSP2 are in an APS protection group of the system (see fig. 3 a).
When the current working path LSP1 fails, the current working path LSP1 is moved out of the tunnel protection group of the system, and a new available service path LSP5 is added as a dynamic protection path in the tunnel protection group of the system, and the service path LSP2 is switched between the output port of the input-side network device and the input port of the output-side network device, so that the service path LSP2 becomes the working path, at this time, 4 of the service paths LSP2, LSP3, LSP4, and LSP5 are in the tunnel protection group of the system, and the service paths LSP2 and LSP3 are located in the APS protection group of the system (see fig. 3 b).
When the current working path LSP2 fails, the current working path LSP2 is moved out of the tunnel protection group of the system, and a new available service path LSP6 is added as a dynamic protection path in the tunnel protection group of the system, and the service path LSP3 is switched between the output port of the input-side network device and the input port of the output-side network device, so that the service path LSP3 becomes the working path, and at this time, the service paths LSP3, LSP4, LSP5, and LSP6 are in the tunnel protection group of the system, and the service paths LSP3 and LSP4 are located in the APS protection group of the system (see fig. 3 c).
When the current working path LSP3 fails, the current working path LSP3 is moved out of the tunnel protection group of the system, and a new available service path LSP7 is added as a dynamic protection path in the tunnel protection group of the system, and the service path LSP4 is switched between the output port of the input-side network device and the input port of the output-side network device, so that the service path LSP4 becomes the working path, and at this time, the service paths LSP4, LSP5, LSP3, and LSP7 are in the tunnel protection group of the system, and the service paths LSP4 and LSP5 are located in the APS protection group of the system (see fig. 3 d).
When the line fault is recovered, the output port of the input end network equipment and the input port of the output end network equipment are switched back to the initial working path preferentially, and the protection path is switched back according to the weight.
In the dynamic working mode, if there is a new available service path, the failed service path will be moved out of the tunnel protection group of the system and replaced by the tunnel protection group of the new available service path added into the system. This has the advantage that traffic communication is guaranteed as long as there is a path available between the input network device and the output network device.
(3) Dynamic and static combined operating modes:
for example, 2 paths LSP2 and LSP3 are static, and 1 path LSP4 is dynamic.
Initially, the traffic path LSP1 is an initial working path, the traffic paths LSP2 and LSP3 are static protection paths, the traffic path LSP4 is a dynamic protection path, and at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in a tunnel protection group of the system, and the traffic paths LSP1 and LSP2 are in an APS protection group of the system (see fig. 4 a).
When the current working path LSP1 fails, the output port of the input-side network device and the input port of the output-side network device switch to the traffic path LSP2, so that the traffic path LSP2 becomes the working path, at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in the tunnel protection group of the system, and the traffic paths LSP2 and LSP3 are in the APS protection group of the system (see fig. 4 b).
When the current working path LSP2 fails, the output port of the input-side network device and the input port of the output-side network device switch to the traffic path LSP3, so that the traffic path LSP3 becomes a working path, at this time, the traffic paths LSP1, LSP2, LSP3, and LSP4 are in the tunnel protection group of the system, and the traffic paths LSP3 and LSP4 are in the APS protection group of the system (see fig. 4 c).
When the current working path LSP3 fails, the output port of the input-side network device and the input port of the output-side network device are switched to the service path LSP4, so that the service path LSP4 becomes the working path, the LSP1 is moved out of the protection group, and a new available service path LSP5 is added to the system protection group as a dynamic protection path. At this time, the traffic paths LSP2, LSP3, LSP4 and LSP5 are in the tunnel protection group of the system, and the traffic paths LSP4 and LSP5 are in the APS protection group of the system (see fig. 4 d).
When the line fault is recovered, the output port of the input end network equipment and the input port of the output end network equipment are switched back to the initial working path preferentially, and the protection path is switched back according to the weight.
And in the dynamic and static combined working mode, the protection path set in the static working mode always exists, and the protection path set in the dynamic working mode can be moved out of a tunnel protection group of the system. The static protection path is always weighted higher than the dynamic protection path.
It should be noted that, although the above-mentioned embodiments of the present invention are illustrative, the present invention is not limited thereto, and thus the present invention is not limited to the above-mentioned embodiments. Other embodiments, which can be made by those skilled in the art in light of the teachings of the present invention, are considered to be within the scope of the present invention without departing from its principles.
Claims (6)
1. A multi-path fast switching system of an optical network is characterized by comprising input end network equipment, output end network equipment and N service paths;
the service data is input by an input port of the input end network equipment; the N service paths are connected between the output port of the input end network equipment and the input port of the output end network equipment; wherein, the 1+ M service paths are positioned in a tunnel protection group of the system, and 1 service path in the tunnel protection group of the system is a working path; the N- (1+ M) service paths are positioned outside a tunnel protection group of the system; the service data is output by an output port of the output end network equipment;
m and N are positive integers, N is more than or equal to M +1, and M is more than or equal to 1.
2. An optical network multi-path fast switching system as claimed in claim 1, wherein the N traffic paths have different weights.
3. An optical network multi-path fast switching system as claimed in claim 2, wherein the M traffic paths are static traffic paths or dynamic traffic paths, and wherein the static traffic paths are always weighted higher than the dynamic protection paths.
4. An optical network multi-path fast switching method implemented by an optical network multi-path fast switching system according to claim 1, wherein the operating mode of the system includes a static operating mode, a dynamic operating mode or a dynamic and static combined operating mode;
firstly, defining that M service paths of a tunnel protection group of a system comprise 1 initial working path and M static protection paths in a static working mode; when the current working path has a fault, the service path in the tunnel protection group of the system is kept unchanged, and the working path between the output port of the input end network equipment and the input port of the output end network equipment is switched to a static protection path which has no fault and has a priority weight next to the current working path;
defining that M service paths of a tunnel protection group of the system comprise 1 initial working path and M dynamic protection paths in a dynamic working mode; when the current working path fails, the current working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as a dynamic protection path, the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched to a dynamic protection path which is not failed next to the current working path and has a priority weight;
defining that M service paths of a tunnel protection group of the system comprise 1 initial working path, L static protection paths and M-L dynamic working paths in a dynamic and static combined working mode;
when the current working path has a fault and is the initial working path or the static protection path with the highest weightness, the service path in the tunnel protection group of the system is kept unchanged, and the working path between the output port of the input end network device and the input port of the output end network device is switched to the next static protection path which has no fault and has a priority weighting;
when the current working path has a fault and the current working path is a static protection path with the highest weight, the initial working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as a dynamic protection path, and the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched into the dynamic protection path with the highest weight;
when the current working path has a fault and is a dynamic protection path, the current working path is moved out of a tunnel protection group of the system, a new available service path is added into the tunnel protection group of the system as the dynamic protection path, and the working path between an output port of the input end network equipment and an input port of the output end network equipment is switched to a dynamic protection path which is next to the current working path, has no fault and has a priority weight;
wherein M and L are positive integers, M is more than L, and L is more than or equal to 1.
5. An optical network multi-path fast switching method as claimed in claim 4, wherein the current working path and the next working path to be switched are located in the APS protection group of the system at the same time.
6. The method as claimed in claim 4, wherein in the static operation mode, the dynamic operation mode or the dynamic and static combination operation mode, when the line fault is recovered, the initial operation path is switched back preferentially between the output port of the input end network device and the input port of the output end network device, and the protection path is switched back according to the weight.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128176A1 (en) * | 2006-05-10 | 2007-11-15 | Huawei Technologies Co., Ltd. | A service switching method and the network node thereof |
| CN206313794U (en) * | 2016-12-30 | 2017-07-07 | 中国电子科技集团公司第三十四研究所 | A kind of redundant communication system based on SDH |
| CN110417564A (en) * | 2018-04-26 | 2019-11-05 | 北京东土军悦科技有限公司 | Link protection method, device, equipment and the storage medium of full mesh |
| CN111092813A (en) * | 2019-12-18 | 2020-05-01 | 新华三半导体技术有限公司 | Equivalent multipath ECMP switching method, network equipment and system |
| CN211981872U (en) * | 2020-06-19 | 2020-11-20 | 上海拜安实业有限公司 | Highly integrated optical network double protection system |
| CN214101381U (en) * | 2020-12-25 | 2021-08-31 | 中国电子科技集团公司第三十四研究所 | Optical network multi-path fast switching system |
-
2020
- 2020-12-25 CN CN202011557074.7A patent/CN112583474B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128176A1 (en) * | 2006-05-10 | 2007-11-15 | Huawei Technologies Co., Ltd. | A service switching method and the network node thereof |
| CN206313794U (en) * | 2016-12-30 | 2017-07-07 | 中国电子科技集团公司第三十四研究所 | A kind of redundant communication system based on SDH |
| CN110417564A (en) * | 2018-04-26 | 2019-11-05 | 北京东土军悦科技有限公司 | Link protection method, device, equipment and the storage medium of full mesh |
| CN111092813A (en) * | 2019-12-18 | 2020-05-01 | 新华三半导体技术有限公司 | Equivalent multipath ECMP switching method, network equipment and system |
| CN211981872U (en) * | 2020-06-19 | 2020-11-20 | 上海拜安实业有限公司 | Highly integrated optical network double protection system |
| CN214101381U (en) * | 2020-12-25 | 2021-08-31 | 中国电子科技集团公司第三十四研究所 | Optical network multi-path fast switching system |
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