CN101138256A - Cooperative method for protection recovery between layered network in automatic exchange optical network - Google Patents
Cooperative method for protection recovery between layered network in automatic exchange optical network Download PDFInfo
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- CN101138256A CN101138256A CNA2005800489303A CN200580048930A CN101138256A CN 101138256 A CN101138256 A CN 101138256A CN A2005800489303 A CNA2005800489303 A CN A2005800489303A CN 200580048930 A CN200580048930 A CN 200580048930A CN 101138256 A CN101138256 A CN 101138256A
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Abstract
A harmonizing method for protection restoration between middle-level network in automatic switched optical network is disclosed. The method comprises: setting restoration delay initiating timer for all service connections; every network element in the network real time detects alarm status of all links and service connections, and at the same time, detects timing status of the restoration delay initiating timer; if detects there is a link failure, then the local network element that detects link alarm initiates local corresponding protection restoration, and then continues to detect alarm status and timing status; if detects there is a service connection alarm, then reroutes service alarm detected by source network element in the domain, and then initiates restoration delay timer, and continues to detect alarm status and timing status; if detects that the time of restoration delay initiating timer is end, then reroutes the source network element in the domain, and monitors original interrupted service again, if the alarm still exist, then initiates global restoration, and then continues to detect alarm status and timing status. The invention establishes complete protection restoration system for different network level, and the advantages of the invention are rapid and credibility.
Description
The coordination approach technical field of recovery is protected between a kind of layered network in automatic exchange optical network,
The present invention relates to optical-fiber network technical field, more particularly to a kind of ASON（AS0N the coordination approach that the protection in) between layer network recovers.Background technology
The optical-fiber network of prior art, such as OTN (Optical transmission network, optical transport network）, WDM (Wavelength- division multiplexing, wavelength-division multiplex), SDH (Synchronous digital hierarchy, Synchronous Digital Hierarchy）Or SONET (Synchronous optical network, Synchronous Optical Network）Transmission net, has been used widely in field of telecommunications.
ASON (Automatic switched optical network, abbreviation AS0N) is the study hotspot of field of optical networks in recent years.ITU- TG. 8080 and G771X series suggestions propose AS0N concept, the special control plane by setting（Control plane, abbreviation CP) carry out the functions such as automatic foundation, the automatic recovery of connection of finishing service connection.
Self-healing ability is an important feature of optical-fiber network, No. 841 suggestions of International Telecommunication Association ITU- TG.《The classification of SDH network protection structure and characteristic》SDH/S0NET optical transfer network self-healing functions are described in detail.Its guard method recommended includes being based on path（Path protection) and based on link（Link protection).Based on path（Path protection), it is most common to have path protection and SNCP；Based on link（Link protection), most often there is two fine or Four-fiber MS shared protection ring, 1+1/1:Ν Linear multiplex section links etc..Path protection, multiplex section protection have obtained application widely in conventional optical network.
Optical-fiber network is evolved to after network structure from chain, ring, and AS0N proposes the automatic recovery method for the self-healing for solving the problems, such as mesh network, i.e., automatic heavy route method.Its general principle is：After service connection failure, the network element in heavy-route domain, based on its control plane, uses the methods such as source routing, hop-by-hop route or hierarchical routing to find connection, the automatic recovery of finishing service again for customer service.
Optical-fiber network is evolved to after mesh network, is not meant to have casted off original traditional protection once and for all.The protection mechanisms such as multiplex section ring, multiplex section chain still long-term existence in the mesh network.Meanwhile, in order to adapt to netted web frame, the preset route recovery method based on Link, the automatic recovery method based on Link also have been used in a large scale.Therefore, the automatic recovery of the mechanism of protection and restoration of current and mesh network in future necessarily based on Path and multiplex section ring, multiplex section chain, and the preset route based on Link or automatic rerouting recovering mode are while and deposit.
It is client/server relationship between a kind of hierarchical network, layer network that optical-fiber network, which is,；Multiplex section ring, multiplex section chain etc.
Protection mechanism, preset route or automatic rerouting recovering mode based on Link may be considered protection or the Restoration Mechanism of service layer's layer network, for convenience, hereinafter referred to local protection reset mode.It is a kind of global repair modes of heavy ^ in domain and the automatic rerouting recovering mode based on Path may be considered Restoration Mechanism of the client layer layer network based on heavy-route domain, for convenience, hereinafter referred to global repair mode.
- as, service layer's network failure can trigger client layer signal failure, therefore, when service layer's network failure, locally protect reset mode, global repair mode to start simultaneously, not only waste of resource, while can trigger the multi damage of business.
Prior art is directed to the overlapping situation of mechanism of protection and restoration between layered network in automatic exchange optical network, presently, there are following solution：
1. being arrived using the former e-learning quality of local mechanism of protection and restoration after ASQN networks, cancel original based on mechanism of protection and restoration, be used uniformly the mechanism of protection and restoration based on Path.
2. being arrived using the former e-learning quality of local mechanism of protection and restoration after AS0N networks, retain multiplex section protection, the original reset mode based on Link of revocation is used uniformly the mechanism of protection and restoration based on Path.Do not consider whether service path passes through multiplex section protection.
3. being arrived using the former e-learning quality of local mechanism of protection and restoration after AS0N networks, retain multiplex section protection, the original reset mode based on Link of revocation is used uniformly the mechanism of protection and restoration based on Path.Pass through the Path of multiplex section protection for service path, recovery Startup time will postpone one and stall for time.Stall for time by setting back off timer to complete.
4. use number of patent application for US6718480 method, the ratio of the Client Signal Fail carried according to service layer determines still from client layer starting protection to recover from service layer.
For method 1, all business all use the automatic Restoration Mechanism based on Path, then flow will be flow as shown in Fig. 1,2 or 3.
Automatically restoring flow as shown in Fig. 1 is in Routing information database RDB (Routing Information
Database) renewal starts business recovery after completing, and this restoration methods reliability based on newest RDB is high, but failure broadcast and RDB renewals cause the larger delay of service recovery time.For catenet, postpone more obvious.
Automatically restoring flow as shown in Figure 2 is to position to search for the incoherent restoration route of faulty link to recover to be connected to realize business recovery process to set up based on accurate link failure.Link failure location technology comparative maturity, for example, can position failure using transport plane alarm correlation analysis.This restoration methods can be as far as possible using the resource of non-faulting link, and its recovery reliability is higher, but fault location also results in the larger delay of service recovery time；If service connection path is longer, link capacity is larger, when warning information amount is larger, and delay will be more obvious.
Flow as shown in Figure 3 is to search for restoration route to avoid former service path for constraints, overcome RDB renewals or
Failure recovers delay caused by being accurately positioned, but for small-/medium-sized Intranet, the reliability that it recovers is relatively low.The four network element mesh networks for example as shown in Fig. 4, for the service connection that service path is A-B-C-D, in A-B, B-C or tri- links of C-D, any link failure, recovery can all fail.
If method 1 will take substantial amounts of Internet resources using initialization or protected mode based on Path.Therefore, it is simple as described above that protection and the recovery demand of existing optical-fiber network can not be met very well using method 1.
Method 2 is such as used, then service path breaks down by multiplex section protection section will trigger multiplex section protection and start while recovery.In network as shown in Figure 5, in case the multiplex section ring that the F of B-C mono- are 3 network elements.For the service connection transmitted along A-B-C-D, if B-C section faults, multiplex section protection action recovers service connection, and the service path after recovery is A-B- F-C-D.And business recovery will be again A- F- E-D by the recovery process having been started up.As can be seen here, there is business multi damage in this method.
Such as use method 3, although solve the problems, such as multi damage when service path passes through multiplex section protection section, but for multiplex section protection section fault, due to recovering to need delayed startup, the time of service damage greatly prolongs.For example in the network shown in Fig. 5, in case the multiplex section ring that the F of B-C mono- are 3 network elements.For the service connection transmitted along A-B- C- D, if C_D section faults, recover delayed startup, although business is most recovered through A- F- E- D afterwards, continuous damage time lengthening.
And the ratio of the Client Signal Fail carried according to service layer due to method 4 determines still from client layer starting protection to recover from service layer; this protected mode is only just effective when service layer and client layer signal alarm-monitor point are located at same network element, or when service layer's signal path and completely overlapped client layer signal path.
Failed below with the SDH network transmission A- B- C- D business of the network structure shown in Fig. 5 in link B- C failures or C-D failures or network element C（For example, power supply trouble）Exemplified by illustrate the effect of the above method 1,2,3,4 in the prior art.
Method 1:Either link B- C failures or C-D failures, or network element C failures, have network element A to complete global repair according to flow shown in Fig. 1,2 or 3.So, in case of link failure, service recovery time is slow.And link failure is the most common failure of optical-fiber network, the probability that network element failure then occurs is very small.
Method 2:Link B- C failures or network element C failures, will all there is multiple network elements starting protection and recovery simultaneously.If
B-C failures, then 8, C network elements start MSP-ring, while network element A starts global repair.General multiplex section ring will be prior to global repair execution.So business A- B- C-D are restored to path A- B-F- C- D, and return to A-F-E-D, and business poly-injury is once..
Method 3:The problem of MSP-ring and global repair all start when solving link B-C failures.But for link C- D failures, although link C-D will also undergo the time delay of a Wait-to-Restore without local protection reset mode, network element A, and the service damage time lengthens.
Method 4:A-B- C- D business is in link AH) failure when, network element A can judge it is to start local protection to recover or start global repair by certain mechanism.But for link B-C failures, it is not same network element to start the network element B or C of local protection recovery and the network element of global repair, it is difficult to which integrated decision-making is which kind of mode started.
Therefore, prior art also existing defects, and need to be improved and develop.The content of the invention
It is an object of the invention to provide the coordination approach that recovery is protected between a kind of layered network in automatic exchange optical network; the protection problem of business when multilayer mechanism of protection and restoration coexists can not be solved very well in the prior art for overcoming, it is proposed that a kind of multilayer protects the technical scheme of co-operating.
Technical solution of the present invention comprises the following steps：
The coordination approach of recovery is protected between a kind of layered network in automatic exchange optical network, it comprises the following steps：A), it is appointed as locally protecting reset mode for all links in network；
B), set for all service connections and recover delayed startup timer；
C), each network element detects the alert situation of all links of this network element and service connection in real time in network, while detecting the timing situation for recovering back off timer；If link failure has been detected Jin rows Xia mono- Walk operation；If detecting service connection alarm, step e) is carried out;If the timing time for detecting recovery delayed startup timer is arrived, step f) is carried out;Otherwise continue to monitor；
D), the local network element of detection chain circuit alarming starts corresponding local protection and recovered；It is transferred to the step c);
E), start after heavy-route domain source network element detection service alarm and recover delay timing；It is transferred to the step c);F), recover delay timing to arrive, heavy-route domain source network element simultaneously monitors former interrupting service again, if alarm still has, starts global repair；It is transferred to the step c).
Described method, wherein, there is such as Types Below in the survivability demand of the business：When needing fast and reliable recovery, needing to recover and need not recover, methods described includes：
The step a) also includes：The reserved passage unrelated with local protection reset mode, for carrying the business that need not recover；
The step b) is：To need the business setting of fast and reliable recovery to recover delayed startup timer；The step e) is：Business for needing fast and reliable recovery, starts after the detection service alarm of heavy-route domain source network element and recovers delay timing；Business for only needing to Trusted recovery, heavy-route domain source network element starts global repair.
Described method, wherein, the recovery delay timer timing length in the step b) is set to be not less than the maximum of the longest finishing time of the local protection recovery of all links in the service path.
The coordination approach of recovery is protected between a kind of layered network in automatic exchange optical network provided by the present invention, due to using
Local protection reset mode is as the main protection of business, and global repair constructs complete protection as back-up protection, from different layer networks and recovers system, with quick, reliable advantage.Brief description of the drawings
Fig. 1 is the schematic flow sheet of the automatic recovery method of the use alert broadcast mechanism of prior art；
Fig. 2 is the schematic flow sheet of the automatic recovery method of the use fault localization mechanism of prior art；
Fig. 3 is the schematic flow sheet of the automatic recovery method of the use CR- LDP mechanism of prior art；
Fig. 4 is the mesh network structural representation for including four network elements of prior art；
Fig. 5 is the mesh network structural representation for including six network elements of prior art；
Fig. 6 is to protect the coordination approach schematic flow sheet of recovery between the layered network in automatic exchange optical network of the present invention；Fig. 7 is the schematic flow sheet that the inventive method meets different business survivability demand.Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The core concept that the coordination approach of recovery is protected between layered network in automatic exchange optical network of the present invention is to specify local protection reset mode for each of the links on service path; and global repair mode is used as back-up protection; when locally protection reset mode can not recover business, restart global repair mode.
The method of the invention specifically includes following steps：
Step 1: specifying local protection recovery side for all links in network；
Recover delayed startup timer Step 2: being set for all service connections；
Step 3: each network element detects the alert situation of all links of this network element and service connection in real time in network, while detecting the timing situation for recovering back off timer；If detecting relevant link failure is transferred to next step；If detecting service connection alarm, step 5 is transferred to；If detecting timing time to arrive, step 6 is transferred to；Otherwise continue to monitor；Recover Step 4: the local network element of detection chain circuit alarming starts corresponding local protection, be transferred to step 3 and carry out circulatory monitoring；
Recover delay timing Step 5: starting after the detection service alarm of heavy-route domain source network element, be transferred to step 3 and carry out circulatory monitoring；
Arrived Step 6: recovering delay timing, heavy-route domain source network element monitors former interrupting service again, if alarm still has, starts global repair；It is transferred to step 3 and carries out circulatory monitoring.
Further consider, if the survivability demand of customer service has such as Types Below：Need fast and reliable recovery, need to recover and need not recover, then above-mentioned technical proposal is Step 1: the corresponding improvement of two and five works can just meet requirement.
It is improved to comprise the following steps that：
Step 1: all links specify local protection reset mode, and the reserved passage unrelated with local protection reset mode on intra-network traffic access path；
Step 2: recovering delayed startup timer to need the business of fast and reliable recovery to set；
Step 5: the business for needing fast and reliable recovery, starts after the detection service alarm of heavy-route domain source network element and recovers delay timing, the business for only needing to Trusted recovery, heavy-route domain source network element starts global repair.
Referring to the local passage for protect reset mode unrelated not by local protection reset mode protection described in above-mentioned steps one, also should not after the protection reset mode is started occupied passage, i.e., it is non-to tie up the passage that non-protected is recovered.
In the technical scheme of the invention described above and improved technical scheme, the recovery delay timer timing length described in step 2 is set to t, it should by multiplex section protection, local preset route recovery or condition setting premised on the automatic time for recovering to complete.If service path includes n bar links, the longest finishing time that the local protection of each bar link recovers is respectively th t2..., tn, then t should meet following condition
t max {ti, t2..., tj
It is the schematic flow sheet for the coordination approach that recovery is protected between layered network in automatic exchange optical network of the present invention as shown in Figure 6, Fig. 7 is the schematic flow sheet that the present invention meets different business survivability demand.
Flow chart with reference to shown in Fig. 6, illustrates embodiment of the present invention by the SDH network transmission A-B-C-D business of network structure shown in Fig. 5 exemplified by B-C section faults.
The step of specific embodiment, is described as follows：
Step 1: network element B-C-F is configured to multiplex section ring, other links of network are using local automatic reset mode；Step 2: being that A- B-C-D business specifies back off timer, delay time is t in network element A；
Step 3: network element B detects B- C link failures, start MSP-ring.Trigger A- B-C- D service alarms while B-C link failures.After the completion of MSP-ring, A-B- C-D service alarms disappear.
Step 4: network element A detects A- B- C- D service alarms, start recover delay timing immediately.
Step 5: network element A detection A-B-C-D business relevant recovering delay timer timing times are arrived.
Step 6: network element A detects A- B- C- D service alarms again, A-B-C- D service alarms have disappeared.Now,
Path after A-B-C-D business recoveries is A- B- F- C-D.
Flow chart with reference to shown in Fig. 6, then existed with the SDH network transmission A- B-C-D business of network structure shown in Fig. 5
Illustrate specific embodiments of the present invention exemplified by C-D section faults.
Specific embodiment comprises the following steps：
Step 1: network element B-C-F is configured to multiplex section ring, other links of network are using local automatic reset mode；Step 2: being that A- B-C- D business specifies back off timer, delay time is t in network element A；
Step 3: network element C detects C- D link failures, start local automatic recovery.Trigger A- B- C- D service alarms while C- D link failures.After the completion of local automatic recovery, A- B-C-D service alarms disappear.
Step 4: network element A detects A- B- C- D service alarms, start recover delay timing immediately.
Step 5: network element A detection A-B- C-D business relevant recovering delay timer timing times are arrived.
Step 6: network element A detects A-B- C- D service alarms again, A- B-C-D service alarms have disappeared.
Now, the path after A-B- C- D business recoveries is A- B-F-C-E-D.
Start local recovery protected mode in above-mentioned steps three, it is necessary to utilize the link circuit resource of C-F sections.If with multiplex section protection when C- F sections share same link, it is possible to use idle service aisle or NUT passages in link.It is described in detail in the suggestion official documents and correspondences of NUT passage ITU-T G. 841.
With reference to Fig. 6 flow chart, failed with the SDH network transmission A- B-C- D business of the network structure shown in Fig. 5 in network element C（For example, power supply trouble）Exemplified by illustrate specific embodiments of the present invention.
Specific embodiment comprises the following steps：
Step 1: network element B-C-F is configured to multiplex section ring, other links of network are using local automatic reset mode；Step 2: being that A- B- C- D business specifies back off timer, delay time is t in network element A；
Step 3: network element D detects C- D link failures, start local automatic recovery, but recover failure.Network element B detects B- C link failures, starts MSP-ring, but protection failure.Trigger A- B-C-D service alarms while network element C fails.
Step 4: network element A detects A- B- C- D service alarms, start recover delay timing immediately.
Step 5: network element A detection A- B- C- D business relevant recovering delay timer timing times are arrived.
Step 6: network element A detects A- B- C- D service alarms again, A- B- C- D service alarms still have, and start global repair.Business is finally recovered, and the path after A-B-C- D business recoveries is A- F- E- D.
The technical scheme for contrasting prior art and the invention described above is understood; main protection of the inventive method in local recovery mode as business; global repair builds complete protection as back-up protection, from different layer networks and recovers system, with quick, reliable advantage.
As shown in figure 8, so that the business of the different survivabilities needs of the SDH network transmission of network structure shown in Fig. 5 is in B-C section faults as an example, illustrating improved technical scheme of the invention., wherein it is desired to the service path of fast quick-recovery be A- B- OD, need Trusted recovery service path be A- B- (.
Specific embodiments of the present invention may include following steps：
Step 1: network element B-C-F is configured to multiplex section ring, other links of network are using local automatic reset mode；Multiplex section ring is configured to logic box or specified NUT passages; other links for locally being recovered protection automatically equally reserve it is non-tie up non-recovery passage, for need Trusted recovery business A-B- (, that the business B-C- D that are not required to recover provide service bearer is logical
Road.
Walk rapid two, in network element A, be A-B- C- D business specify back off timer, delay time is t；
Step 3: network element B detects B- C link failures, start MSP-ring, recover A-B-C- D business.Trigger A- B- C- D service alarms, A- B- C service alarms, B- C-D service alarms while B-C link failures.After the completion of MSP-ring, A- B-C- D service alarms disappear.
Step 4: network element A detects A- B-C-D service alarms, start recover delay timing immediately.Network element A detects A- B-C service alarms, starts global repair.Network element B detects B-C-D service alarms and does not take any action.
Step 5: network element A detection A-B-C- D business relevant recovering delay timer timing times are arrived.
Step 6: network element A detects A-B-C- D service alarms again, A- B-C-D service alarms have disappeared.Finally,
Path after A-B-C-D business recoveries is that the path after A-B- F- C- D, A-B-C business recoveries is that A-F- C, B-C-D business does not start any protection and recovery measure.
It is visible by foregoing description; main protection of the method for the invention in local recovery mode as business, global repair builds complete protection as back-up protection, from different layer networks and recovers system; the different survivability demands of business are disclosure satisfy that, with quick, reliable advantage.
But it is to be understood that, the above-mentioned description for specific embodiment of the invention is more specific, therefore can not be interpreted as the limitation to scope of patent protection of the present invention, scope of patent protection of the invention should be determined by the appended claims.
Claims (1)
- Claim1st, the coordination approach of recovery is protected between a kind of layered network in automatic exchange optical network, it comprises the following steps:A), it is appointed as locally protecting reset mode for all links in network；B), set for all service connections and recover delayed startup timer；C), each network element detects the alert situation of all links of this network element and service connection in real time in network, while detecting the timing situation for recovering back off timer；Next step operation is carried out if link failure has been detected；If detecting service connection alarm, step e) is carried out;If the timing time for detecting recovery delayed startup timer is arrived, step f) is carried out;Otherwise continue to monitor；D), the local network element of detection chain circuit alarming starts corresponding local protection and recovered；It is transferred to the step c);E), start after heavy-route domain source network element detection service alarm and recover delay timing；It is transferred to the step c);F), recover delay timing to arrive, heavy-route domain source network element simultaneously monitors former interrupting service again, if alarm still has, starts global repair；It is transferred to the step c).2nd, according to the method described in claim 1, it is characterised in that there is such as Types Below in the survivability demand of the business：When needing fast and reliable recovery, needing to recover and need not recover, methods described includes：The step a) also includes：The reserved passage unrelated with local protection reset mode, for carrying the business that need not recover；Stating step b) is：To need the business setting of fast and reliable recovery to recover delayed startup timer；The step e) is：Business for needing fast and reliable recovery, starts after the detection service alarm of heavy-route domain source network element and recovers delay timing；Business for only needing to Trusted recovery, heavy-route domain source network element starts global repair.3rd, method according to claim 1 or 2, it is characterised in that the recovery delay timer timing length in the step b) is set to be not less than the maximum of the longest finishing time of the local protection recovery of all links in the service path.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2005/000794 WO2006131020A1 (en) | 2005-06-06 | 2005-06-06 | Harmonizing method for protection restoration between middle-level network in automatic switched optical network |
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| CN101138256A true CN101138256A (en) | 2008-03-05 |
| CN101138256B CN101138256B (en) | 2010-05-12 |
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| WO (1) | WO2006131020A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065470A1 (en) * | 2010-11-17 | 2012-05-24 | 中兴通讯股份有限公司 | Method and device for processing link fault |
| CN106658186A (en) * | 2016-10-27 | 2017-05-10 | 四川长虹电器股份有限公司 | UI operation synchronizing method for network switching of intelligent TV set |
| CN108418649A (en) * | 2018-02-13 | 2018-08-17 | 中国联合网络通信集团有限公司 | A kind of method and apparatus calculating service delay |
| CN110995513A (en) * | 2019-12-27 | 2020-04-10 | 远景智能国际私人投资有限公司 | Data sending and receiving method in Internet of things system, Internet of things equipment and platform |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179768B (en) * | 2007-11-23 | 2011-04-06 | 华为技术有限公司 | Method, network element and access network for relieving overload of access amount of home location register |
| CN101197591B (en) * | 2008-01-02 | 2011-05-25 | 中兴通讯股份有限公司 | Protection recovery method and apparatus for ASON |
| CN103166796B (en) * | 2013-03-13 | 2014-12-10 | 武汉邮电科学研究院 | Method for realizing consistency of service signal transceiving paths during service recovery of power communication network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6370110B1 (en) * | 1998-09-16 | 2002-04-09 | At&T Corp | Back-up restoration technique for SONET/SHD rings |
| JP3871467B2 (en) * | 1999-03-25 | 2007-01-24 | 富士通株式会社 | Communication path failure recovery device |
| CA2339716A1 (en) * | 2000-03-29 | 2001-09-29 | Nortel Networks Limited | Two stage, hybrid logical ring protection with rapid path restoration over mesh networks |
| CN1194507C (en) * | 2003-01-09 | 2005-03-23 | 上海交通大学 | Bidirectional channel restitution in automatic optical exchange network |
-
2005
- 2005-06-06 CN CN2005800489303A patent/CN101138256B/en not_active Expired - Fee Related
- 2005-06-06 WO PCT/CN2005/000794 patent/WO2006131020A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065470A1 (en) * | 2010-11-17 | 2012-05-24 | 中兴通讯股份有限公司 | Method and device for processing link fault |
| CN106658186A (en) * | 2016-10-27 | 2017-05-10 | 四川长虹电器股份有限公司 | UI operation synchronizing method for network switching of intelligent TV set |
| CN106658186B (en) * | 2016-10-27 | 2019-08-13 | 四川长虹电器股份有限公司 | The method for realizing the synchronous UI operation of smart television network switching |
| CN108418649A (en) * | 2018-02-13 | 2018-08-17 | 中国联合网络通信集团有限公司 | A kind of method and apparatus calculating service delay |
| CN110995513A (en) * | 2019-12-27 | 2020-04-10 | 远景智能国际私人投资有限公司 | Data sending and receiving method in Internet of things system, Internet of things equipment and platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101138256B (en) | 2010-05-12 |
| WO2006131020A1 (en) | 2006-12-14 |
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