CN102255744A - Network protection method and device based on IPS (Information Processing System) - Google Patents
Network protection method and device based on IPS (Information Processing System) Download PDFInfo
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- CN102255744A CN102255744A CN2010101903784A CN201010190378A CN102255744A CN 102255744 A CN102255744 A CN 102255744A CN 2010101903784 A CN2010101903784 A CN 2010101903784A CN 201010190378 A CN201010190378 A CN 201010190378A CN 102255744 A CN102255744 A CN 102255744A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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Abstract
The invention discloses a network protection method and device based on an IPS (Information Processing System). The method comprises the steps of: determining the available protection section with the highest priority of a structure protection group IPG when a working section in the IPG goes wrong; and switching the TESI (Traffic Engineering Service Instance) traffic of the working section going wrong to a determined protection section to transmit, wherein the IPG comprises one working section and a plurality of protection sections, and the plurality of protection sections has different priorities respectively. The network protection method and device disclosed by the invention increase the survivability of the protected traffic of the TESI transmitted in the protection group of the IPS, and realize a many-for-one network protection switch.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of network protection method and device based on IPS.
Background technology
At PBB-TE (Provider Backbone Bridge Traffic Engineering; the operator backbone bridging technology of support traffic engineering) in the sectionalised protection technology; provide the one group of selected TESI that passes through same paths (Traffic Engineered Service Instance; the traffic engineering Service Instance) localised protection; this resist technology is also referred to as IPS (Infrastructure Protection Switching, structural defence switches).
In IPS, set up the protection group respectively on two end nodes of enforcement protection change action, the protection group among the IPS is called IPG (Infrastructure Protection Group, structural defence group), and a protection section and an active section are set among each IPG.After initialization was finished, when active section did not all have fault with the protection section, the flow of the protected TESI of IPG association transmitted on active section; When active section breaks down, and a protection section fault-free, perhaps implemented to require the flow of TESI to switch to the administration order of protection section, then the flow of the protected TESI of each association among the IPG switches to the protection section and goes up transmission.Therefore when link occurs fault, the IPS technology can provide the survivability of the service traffics of protected TESI effectively.In this IPS, have only a protection section and an active section among the IPG, therefore be called man-to-man IPS, be also referred to as 1: 1 IPS.
Fig. 1 to Fig. 3 is 1: 1 an IPS structural representation according to correlation technique, and as shown in Figure 1, nodes X and Y are two end nodes of IPS, create IPG protection group on nodes X and Y respectively, and wherein X-B-C-Y is an active section, and X-D-Y is the protection section.After initialization was finished, when active section did not all have fault with the protection section, the flow of the protected TESI of IPG association transmitted on active section, and as shown in Figure 1, the traffic transport path of protected TESI is X-B-C-Y; When active section breaks down, and during protection section fault-free, then the flow of related protected TESI switches to the protection section and goes up transmission among the IPG, and as shown in Figure 2, the traffic transport path of protected TESI is X-D-Y.Therefore when the link occurs fault of active section, 1: 1 IPS technology can provide the survivability of the service traffics of protected TESI effectively.
To sum up, in 1: 1 IPS, after active section broke down, the flow of protected TESI can not continue to transmit on active section, can switch on the protection section by the IPS technology to transmit, and can ensure the connection again of the flow of protected TESI.But; if the protection section continues to break down (fault has all taken place for protection section and the active section of promptly 1: 1 IPS), then the flow of protected TESI can not transmit on active section, can not transmit on the protection section; as shown in Figure 3, the flow of protected TESI will interrupt.Therefore, 1:, in the higher network of fault probability of happening, still be difficult to satisfy the high reliability request of the traffic transport of protected TESI though 1 IPS technology has improved the reliability of the traffic transport of protected TESI to a certain extent.For example in certain network; the probability of a section (active section or protection section) fault is 1%; then in 1: 1 IPS; the probability of active section and protection section simultaneous faults is 0.01%; promptly the available probability of the protection group of this IPS is 99.99%, also far below the requirement of carrier level reliability 99.999%.
Summary of the invention
Main purpose of the present invention is to provide a kind of network protection method and device based on IPS, still is difficult to satisfy the problem of high reliability request of the traffic transport of protected TESI with the IPS technology that solved at least above-mentioned 1: 1.
According to an aspect of the present invention, provide a kind of network protection method, having comprised: when the active section among the structural defence group IPG breaks down, determine the available protection section of IPG with limit priority based on structural defence switching IPS; The TESI flow of the active section that breaks down is switched to definite protection section to be transmitted; Wherein, IPG comprises an active section and a plurality of protection section, and a plurality of protection sections have different priority respectively.
According to a further aspect in the invention, provide a kind of network protector, having comprised based on structural defence switching IPS: determination module, be used for when the active section of structural defence group IPG breaks down, determine the available protection section of IPG with limit priority; Handover module, the TESI flow that is used for the active section that will break down switches to definite protection section and transmits; Wherein, IPG comprises an active section and a plurality of protection section, and a plurality of protection sections have different priority respectively.
By the present invention; by an active section and a plurality of protection section are set in IPG; promptly increased the quantity of protection section; when active section and one protection section breaks down; other protection section is still available, and the flow of protected TESI can ensure the connection again of the flow of protected TESI by the protection section transmission that substitutes; thereby the survivability that the flow that has improved protected TESI transmits in the protection group of IPS has realized many-to-one network protection switching.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is according to the operation schematic diagram during the link fault-free in 1: 1 the IPS technology of correlation technique;
Fig. 2 is the operation schematic diagram when active section breaks down in 1: 1 the IPS technology of correlation technique;
Fig. 3 is the operation schematic diagram when breaking down according to active section in 1: 1 the IPS technology of correlation technique and protection Duan Jun;
Fig. 4 is the flow chart based on the network protection method of IPS according to the embodiment of the invention;
Fig. 5 is according to the preferred embodiment of the invention based on the flow chart of the network protection method of IPS;
Fig. 6 is the operation schematic diagram during the link fault-free in the IPS technology according to the preferred embodiment of the invention;
Fig. 7 is the operation schematic diagram when active section breaks down in the IPS technology according to the preferred embodiment of the invention;
Fig. 8 is the operation schematic diagram when regulation protection section breaks down in the IPS technology according to the preferred embodiment of the invention;
Fig. 9 is the schematic diagram based on the network protector of IPS according to the embodiment of the invention;
Figure 10 is according to the preferred embodiment of the invention based on the schematic diagram of the network protector of IPS.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In transmission network, comprise a plurality of node devices, set up IPG on two end node devices respectively and the flow of protected TESI is protected to adopt the IPS technology.
Fig. 4 is the flow chart based on the network protection method of IPS according to the embodiment of the invention, may further comprise the steps:
Step S102 when the active section among the IPG breaks down, determines the available protection section with limit priority of this IPG;
Step S104 switches to the protection section of determining among the step S102 with the TESI flow of the active section that breaks down and transmits; Wherein, this IPG comprises an active section and a plurality of protection section, and these a plurality of protection sections have different priority respectively.
For example; an active section and a plurality of protection section are set in IPG; wherein; each protection section is set different priority respectively; the protection section that has limit priority in a plurality of protection sections can be called regulation protection section; other protection sections can be called preparation protection section, and the priority of preparation protection section all is lower than the priority of regulation protection section.
Like this, when the active section in IPG breaks down, from these a plurality of protection sections, determine the TESI flow in the active section that an available protection section with limit priority transmits to break down.For example; judge at first whether regulation protection section (being a plurality of protection sections that have limit priority in the section of protecting of IPG) is available; if it is available; then protected TESI flow related with IPG in the active section that breaks down being switched to regulation protection section transmits; if regulation protection section is unavailable, then select the available the highest protection section of preparation protection section medium priority to transmit protected TESI flow related in the active section that breaks down with IPG.
In the correlation technique owing to only be provided with an active section and one protection section (an IPS technology of promptly 1: 1) among the IPG; when active section breaks down with protection Duan Jun; the flow of protected TESI will interrupt; therefore; in the higher network of fault probability of happening, still be difficult to satisfy the high reliability request of the traffic transport of protected TESI.Present embodiment (can be called M: 1 IPS resist technology by an active section and a plurality of protection section are set in IPG; wherein the M representative has M protection section; 1 representative has 1 active section; also can be called many-to-one IPS resist technology); promptly increased the quantity of protection section; when active section and one protection section breaks down; other protection section is still available; the flow of protected TESI can be by the protection section transmission that substitutes; ensure the connection again of the flow of protected TESI; thereby the survivability that the flow that has improved protected TESI transmits in the protection group of IPS has realized many-to-one network protection switching.
Preferably, step S102 comprises: according to priority order from high to low, begin to judge whether from protection section with limit priority available, up to from a plurality of protections section of IPG, determining first available protection section.Like this, always can guarantee that first available protection section of determining is the protection section that has limit priority in the available protection section of IPG.
For example; in the process that reality is implemented; when the active section of IPG breaks down; whether a plurality of protection sections (can be called regulation protection section) that have limit priority in the section of protecting of at first judging IPG are available; if it is available; then protected TESI flow related with IPG in the active section that breaks down being switched to regulation protection section transmits; if it is unavailable; then in a plurality of protection sections of IPG, remove in other protection sections the regulation protection section (can be called preparation protect section), according to priority order from high to low judge whether successively available in the active section that finds an available protection section with limit priority to transmit to break down the protected TESI flow related with IPG.
Preferably, after step S104, also comprise: when the protection section of determining among the step S102 breaks down, redefine the available protection section of IPG with limit priority; The TESI flow that is somebody's turn to do the protection section of determining that breaks down is switched to the protection section that redefines to be transmitted.
After the preferred embodiment provides the protection section of determining in step S102 to break down; switch guaranteeing that protected TESI flow can not interrupt by in the available protection section of IPG, redefining or select a protection section with limit priority to proceed flow, thereby further improved the reliability of transmission.
For example; the protection section of determining among the step S102 is regulation protection section; after step S104; if regulation protection section breaks down (promptly unavailable); then continue from available preparation protection section, to determine or select a protection section (being designated as protection section 2), the TESI flow in the regulation protection section that breaks down is switched to this protection sections 2 transmit with limit priority.
Preferably; in above-mentioned method; also comprise: in step S102, after active section breaks down,, then indicated the clauses and subclauses of the protection section of transmission TESI flow to be set at protection section being used in the protection segment table of IPG with limit priority if a plurality of protection sections of IPG are all unavailable.Though this moment, all protection sections of IPG were all unavailable,, still these clauses and subclauses are set at a plurality of protection sections that have limit priority in the section of protecting of IPG because these clauses and subclauses can not be sky.Like this, when this protection section with limit priority is recovered normal (promptly recovering available), can in time the TESI flow be used this protection section to transmit, make flow can recover transmission in time.At this moment, can't carry out the switching of the flow of ETSI.Obviously, also these clauses and subclauses can be set at other protection section.
Preferably, in step S102, determine also to comprise after the available protection section of IPG: indicate the clauses and subclauses of the protection section of transmission TESI flow to be set at definite protection section being used in the protection segment table of IPG with limit priority; And/or after the available protection section of the above-mentioned IPG of redefining, also comprise: indicate the clauses and subclauses of the protection section of transmission TESI flow to be set at the protection section that this redefines being used in the protection segment table of IPG with limit priority;
Then step S104 comprises: the protection section that the TESI flow of the active section that breaks down is switched to the clauses and subclauses correspondence.
The preferred embodiment provides the specific embodiments of the TESI flow being carried out the switching between the section (comprise active section and protection section) among the IPG.Wherein, the effect of the clauses and subclauses in the protection segment table of structural defence group is as follows: when active section breaks down; if the protection section of the clauses and subclauses correspondence in the protection segment table of structural defence group is available, then the protected TESI flow of active section is switched to the protection section of the clauses and subclauses correspondence in the protection segment table of this structural defence group.Therefore in this many-to-one network protection changing method; switching between the protection section of the clauses and subclauses correspondence in the protection segment table of active section and structural defence group is switched similar with man-to-man structural defence; but in many-to-one network protection method according to the embodiment of the invention; after the protection segment fault of the clauses and subclauses correspondence in the protection segment table of structural defence group; the corresponding new available protection section (being the above-mentioned protection section that redefines) of this clauses and subclauses meeting; thereby the survivability that the flow that can improve protected TESI effectively transmits in the protection group of IPS, the reliability of raising traffic transport.
Fig. 5 is that concrete the processing may further comprise the steps according to the preferred embodiment of the invention based on the flow chart of the network protection method of IPS:
Step S502 a: active section and a plurality of protection section are set in IPG, a plurality of protection sections are provided with different priority respectively, wherein, protection section with the highest priority can be called regulation protection section, other protection sections can be called preparation protection section, and the priority of preparation protection section all is lower than the priority of regulation protection section;
Step S504: the priority that preparation protection section is set;
As shown in Figure 6, nodes X and node Y are two end nodes of IPS, create IPG protection group on nodes X and node Y respectively; wherein, X-B-C-Y is an active section, and X-D-Y is protection section 1; X-E-Y is protection section 2, and X-F-Y is protection section 3, constitutes 3: 1 an IPS protection.Protection section 1 is set is regulation protection section, protection section 2 and protection section 3 are preparation protection section, and the priority that protection section 2 is set is higher than the priority of protection section 3, and therefore, the priority relationship of three protection sections among the IPG is: protection section 1＞protection section 2＞protection section 3.
Step S506: judge that whether regulation protection section breaks down (promptly whether available), if regulation protection section does not break down, then enters step S510, otherwise enters step S508;
Step S508: the clauses and subclauses in the protection segment table of structural defence group are set at regulation protection section, when active section breaks down, the flow of the TESI in the active section that breaks down are switched to regulation protection section; That is,, then the clauses and subclauses in the protection segment table of structural defence group are set at regulation protection section if regulation protection section is available; If can not find available preparation protection section, then the clauses and subclauses in the protection segment table of structural defence group be set at regulation protection section;
As shown in Figure 7; if protection section 1 does not have fault; then will the section of protection 1 as the clauses and subclauses in the protection segment table of structural defence group; therefore the clauses and subclauses of the protection segment table of the IPG protection group of nodes X are protection section 1; corresponding port is P2; the clauses and subclauses of the protection segment table of the IPG protection group of node Y also are protection section 1, and corresponding port is P2.When active section broke down, then the flow with protected TESI related among the IPG switched to transmission on the protection section 1.
Step S510: if regulation protection section has fault, judge whether that then preparation protection section does not break down (promptly whether having available preparation protection section), if, then enter step S512, otherwise, enter step S508 (at this moment, the flow of the TESI in the active section that breaks down can't be switched to regulation protection section); That is, regulation protection section is as the clauses and subclauses in the protection segment table of structural defence group, when regulation protection section is unavailable, selects available preparation protection section medium priority the highest as the clauses and subclauses in the protection segment table of structural defence group;
Step S512: if there is preparation protection section not break down; then in having the preparation protection section of fault (promptly available), do not seek the highest protection section of priority; as the clauses and subclauses in the protection segment table of structural defence group, the flow of the TESI in the active section that breaks down is switched to the protection section that this searches out.
As shown in Figure 8; if protection section 1 breaks down; judged whether that then preparation protection section does not have fault; as shown in Figure 8, protection section 2 and protection section 3 all do not have fault, select the highest protection section 2 of priority as the clauses and subclauses in the protection segment table of structural defence group in these two protection sections; therefore the clauses and subclauses of the protection segment table of the IPG protection group of nodes X are protection section 2; corresponding port is P3, and the clauses and subclauses of the protection segment table of the IPG protection group of node Y also are protection section 2, and corresponding port is P3.When active section breaks down, and protection section 1 is when breaking down, and then the flow of related protected TESI switches to transmission on the protection section 2 among the IPG, and the service traffics of protected TESI can not interrupted, and have therefore improved the existence of service traffics and have given birth to.
To sum up; for example in certain network; the probability of a section (active section or protection section) fault is 1%; then in 3: 1 IPS of present embodiment; the probability of active section and all protection section simultaneous faultss is 0.000001%; promptly the available probability of the protection group of this IPS is 99.999999%, also far above the requirement of carrier level reliability 99.999%.
Fig. 9 is the schematic diagram based on the network protector of IPS according to the embodiment of the invention, comprising: determination module 10, be used for when the active section of IPG breaks down, and determine the available protection section of this IPG with limit priority; Handover module 20, the TESI flow that is used for the active section that will break down switches to this protection section of determining and transmits; Wherein, this IPG comprises an active section and a plurality of protection section, and these a plurality of protection sections have different priority respectively.
Preferably, determination module 10 comprises: judge module 102, be used for according to priority order from high to low, begin to judge whether from protection section with limit priority available, up to from a plurality of protections section of IPG, determining first available protection section.
Preferably, determination module 10 also is used for the TESI flow of the active section that breaks down being switched to after above-mentioned definite protection section transmits at handover module 20, when this protection section of determining breaks down, redefine the available protection section of IPG with limit priority; The TESI flow that is somebody's turn to do the protection section of determining that handover module 20 also is used for breaking down switches to the protection section that redefines and transmits.
Preferably; as shown in Figure 9; in above-mentioned device; also comprise: setting module 30; be used for when active section breaks down; if a plurality of protection sections of IPG all unavailable (being that judge module 102 judges that a plurality of protection sections of IPG are all unavailable) then indicate being used in the protection segment table of IPG the clauses and subclauses of the protection section of transmission TESI flow to be set at the protection section with limit priority.
Preferably, as shown in figure 10, in above-mentioned device, also comprise: setting module 30, be used for after determination module 10 is determined the available protection section with limit priority of IPG, indicate the clauses and subclauses of the protection section of transmission TESI flow to be set at the protection section that this is determined being used in the protection segment table of IPG; Can also be used for after determination module 10 redefines the available protection section with limit priority of IPG, above-mentioned clauses and subclauses being set at the protection section that this redefines; The TESI flow that handover module 20 also is used for the active section that will break down switches to the protection section of this clauses and subclauses correspondence.
Above-mentioned device can be hardware in the node device or software part, also can be node device.
From above description; as can be seen; the present invention has realized following technique effect: by an active section and a plurality of protection section are set in IPG; promptly increased the quantity of protection section; when active section and one protection section breaks down; other protection section is still available; the flow of protected TESI can be by the protection section transmission that substitutes; ensure the connection again of the flow of protected TESI; thereby the survivability that the flow that has improved protected TESI transmits in the protection group of IPS has realized many-to-one network protection switching.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the network protection method based on structural defence switching IPS is characterized in that, comprising:
When the active section among the structural defence group IPG breaks down, determine the available protection section of described IPG with limit priority;
The TESI flow of the described active section that breaks down is switched to described definite protection section to be transmitted;
Wherein, described IPG comprises a described active section and a plurality of described protection section, and a plurality of described protection sections have different priority respectively.
2. method according to claim 1 is characterized in that, determines that the available protection section with limit priority of described IPG comprises:
According to priority order from high to low, begin to judge whether from protection section with limit priority available, up to from a plurality of described protection section of described IPG, determining first available protection section.
3. method according to claim 1 is characterized in that, switches to after described definite protection section transmits at the TESI flow with the described active section that breaks down, and also comprises:
When described definite protection section breaks down, redefine the available protection section of described IPG with limit priority;
The TESI flow of the described protection section of determining that breaks down is switched to the described protection section that redefines to be transmitted.
4. according to each described method in the claim 1 to 3, it is characterized in that, also comprise:
When described active section breaks down,, then indicated the clauses and subclauses of the protection section of the described TESI flow of transmission to be set at described protection section being used in the protection segment table of described IPG with limit priority if described a plurality of protection sections of described IPG are all unavailable.
5. method according to claim 1 is characterized in that,
After the available protection section of determining described IPG, also comprise: indicate the clauses and subclauses of the protection section of the described TESI flow of transmission to be set at described definite protection section being used in the protection segment table of described IPG with limit priority;
The TESI flow of the described active section that breaks down is switched to described definite protection section to be transmitted and comprises: the protection section that the TESI flow of the described active section that breaks down is switched to described clauses and subclauses correspondence.
6. the network protector based on structural defence switching IPS is characterized in that, comprising:
Determination module is used for when the active section of structural defence group IPG breaks down, and determines the available protection section with limit priority of described IPG;
Handover module is used for TESI flow with the described active section that breaks down and switches to described definite protection section and transmit;
Wherein, described IPG comprises a described active section and a plurality of described protection section, and a plurality of described protection sections have different priority respectively.
7. device according to claim 6 is characterized in that, described determination module comprises:
Judge module is used for according to priority order from high to low, begin to judge whether from protection section with limit priority available, up to from a plurality of described protection section of described IPG, determining first available protection section.
8. device according to claim 6 is characterized in that,
Described determination module also is used for the TESI flow of the described active section that breaks down being switched to after described definite protection section transmits at described handover module, when described definite protection section breaks down, redefine the available protection section of described IPG with limit priority;
Described handover module also is used for TESI flow with the described protection section of determining that breaks down and switches to the described protection section that redefines and transmit.
9. according to each described device in the claim 6 to 8, it is characterized in that, also comprise:
Setting module; be used for when described active section breaks down; if described a plurality of protection sections of described IPG are all unavailable, then indicated the clauses and subclauses of the protection section of the described TESI flow of transmission to be set at described protection section being used in the protection segment table of described IPG with limit priority.
10. device according to claim 6 is characterized in that, also comprises:
Setting module is used for after described determination module is determined the available protection section with limit priority of described IPG, indicates the clauses and subclauses of the protection section of the described TESI flow of transmission to be set at described definite protection section being used in the protection segment table of described IPG;
Described handover module also is used for the TESI flow of the described active section that breaks down is switched to the protection section of described clauses and subclauses correspondence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101903784A CN102255744A (en) | 2010-05-21 | 2010-05-21 | Network protection method and device based on IPS (Information Processing System) |
| PCT/CN2010/079673 WO2011143908A1 (en) | 2010-05-21 | 2010-12-10 | Method and device for network protection based on infrastructure protection switching (ips) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101903784A CN102255744A (en) | 2010-05-21 | 2010-05-21 | Network protection method and device based on IPS (Information Processing System) |
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| CN102255744A true CN102255744A (en) | 2011-11-23 |
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| CN2010101903784A Pending CN102255744A (en) | 2010-05-21 | 2010-05-21 | Network protection method and device based on IPS (Information Processing System) |
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| CN (1) | CN102255744A (en) |
| WO (1) | WO2011143908A1 (en) |
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| WO2020211620A1 (en) * | 2019-04-18 | 2020-10-22 | 华为技术有限公司 | Service path switching method and related device |
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| CN102347854A (en) * | 2010-07-30 | 2012-02-08 | 中兴通讯股份有限公司 | Method and device for selecting available pre-protection segment |
| CN102347854B (en) * | 2010-07-30 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and device for selecting available pre-protection segment |
| WO2020211620A1 (en) * | 2019-04-18 | 2020-10-22 | 华为技术有限公司 | Service path switching method and related device |
| US11800262B2 (en) | 2019-04-18 | 2023-10-24 | Huawei Technologies Co., Ltd. | Service path switching method and related device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011143908A1 (en) | 2011-11-24 |
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