CN105866809A - Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method - Google Patents
Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method Download PDFInfo
- Publication number
- CN105866809A CN105866809A CN201610372443.2A CN201610372443A CN105866809A CN 105866809 A CN105866809 A CN 105866809A CN 201610372443 A CN201610372443 A CN 201610372443A CN 105866809 A CN105866809 A CN 105866809A
- Authority
- CN
- China
- Prior art keywords
- module
- vdb
- dcp
- equipment
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/40—Correcting position, velocity or attitude
- G01S19/41—Differential correction, e.g. DGPS [differential GPS]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention relates to ground-based augmentation system ground station equipment with assemblies having the hot standby switching function. The equipment comprises two ground data processing modules DCP1 and DCP2, two very-high-frequency data transmitting modules VDB-S1 and VDB-S2 and two very-high-frequency data receiving modules VDB-R1 and VDB-R2. According to the equipment, DCP equipment, VDB-S equipment and VDB-R equipment of a traditional system are modularized and combined, the combined equipment is called data processing and transceiving equipment DCP-VDB, one DCP module is set to be in a main state, the other DCP module is set to be in a standby state, one VDB-S module is set to be in a main state, the other VDB-S module is set to be in a standby state, and thus comprehensive running state control, redundant backup and online switching are achieved; after DCP uniform control and faulty module replacement, the equipment is restored to the hot standby state, the continuous and normal working state of the whole equipment is maintained, and thus the reliability of the equipment is improved; after a faulty module is replaced, the equipment is restored to the initial main-standby redundant state, switching can be performed again when a fault happens in the subsequent process, and thus the maintainability of the whole equipment is improved.
Description
Technical field
The present invention relates to the ground in field of satellite navigation and strengthen system (GBAS), can be hot standby particularly to a kind of assembly
The ground of switching strengthens system earth station equipment.
Technical background
GBAS improves the precision of satellite navigation system (can reach meter level) by Differential positioning, and by a series of complete
Good property monitors that algorithm improves the performance indications such as the integrity of system, seriality, availability, joins in the range of making covering spatial domain, airport
The aircraft putting corresponding airborne equipment obtains the most high-level precision approach landing guidance service of I class.
GBAS is made up of earth station and airborne equipment, and earth station includes four pairs of reference receivers (RR) and antenna, ground number
According to processing equipment (DCP), very high frequency(VHF) data transmitting/receiving equipment (VDB) and antenna etc..DCP is by combining the measured value from four RR
Produce the differential corrections of visible satellite, meanwhile, by monitoring the abnormal formation integrity information of navigation signal；Then correction
The information such as value, integrity information and glidepath data (be combined as difference and strengthen message) are broadcast to airborne user by VDB equipment；
Airborne equipment is multi-mode receiver, and the difference broadcast by reception satellite navigation signals and earth station strengthens message, carries out
Differential positioning resolves and integrity alerts judgement process etc..
In above-mentioned workflow, each component devices of earth station can continue no-failure operation and be to ensure that whole system is normally transported
Go and reach the premise of system desired properties index.Therefore DCP and VDB is included that RR is referred to as the core group of earth station by us
Part, if DCP or VDB breaks down, will cause the paralysis of whole system, owing to four RR in system have inherently possessed superfluous
Remaining backup capabilities, the redundancy backup of DCP, VDB to be paid close attention to and online switched design.
Summary of the invention
In view of actual needs, the invention provides the integrated scheme of earth station's core component in a kind of GBAS system, will
DCP and VDB EM equipment module also carries out unification design, and the equipment after unification is referred to as data and processes and transceiver (DCP-
VDB), and the comprising modules of this in-one device being carried out redundancy backup and online switched design, in running, equipment is voluntarily
The running status of all modules is monitored, if certain module occurs abnormal, spare module will be enabled, it is ensured that business is not
It is interrupted.Equipment provides warning information simultaneously, and attendant can will appear from the module of fault and be replaced, restorer active and standby
Switching capability, concrete technical scheme is, a kind of assembly can hot standby switching ground strengthen system earth station equipment, including two
Ground data processing module DCP1, DCP2, two very high frequency(VHF)s data transmission module VDB-S1, VDB-S2, and two very high frequency(VHF)s
Data reception module VDB-R1, VDB-R2, it is characterised in that: by original ground station equipment DCP and VDB modularity and unify, unification
After equipment be referred to as data process with transceiver DCP-VDB, its internal module annexation be DCP1 module, DCP2 module it
Between be bi-directionally connected by serial ports, VDB-S1 module, VDB-S2 module and VDB-R1 module, VDB-R2 module pass through serial ports respectively
It is bi-directionally connected DCP1 module, DCP2 module；With in the annexation of other component devices of earth station, the DCP1 mould of this in-one device
Block, DCP2 module and RR1, RR2, RR3, RR4 equipment are connected by serial ports is unidirectional respectively, VDB-S1 module, VDB-S2 module,
VDB-R1 module, VDB-R2 module are connected by radio-frequency cable and an antenna Ant respectively, have one in normal course of operation
DCP module, VDB-S module, two VDB-R modules work simultaneously, and another one DCP, a VDB-S are in standby shape
State, it is possible to switch at any time.
The specific works step of hot standby changing method is, (one) preparation: 1), by DCP-VDB equipment and GBAS ground
Other equipment of standing connects, including reference receiver RR(containing antenna), VDB dual-mode antenna；2), arranging one of them DCP module is
Major state, another one DCP module is standby state, and status information is stored by the memory unit of module self, after module is restarted
State still preserves；3), arranging one of them VDB-S module and be main state, another one VDB-S module is standby state, and state is believed
Ceasing and stored by the memory unit of module self, module is restarted rear state and is still preserved, and VDB-R is without arranging module status；(2)
Equipment run: 1), device power work, be configured to the DCP module of major state, VDB-S module and two VDB-R modules and start
Work, is configured to be in holding state for the DCP module of state, VDB-S module, is ready to switching；2), DCP module is online
Switching, the standby DCP module being in holding state monitors the heartbeat message of main DCP module, if arranging according to system performance requirements
Not receiving the heart beating of main DCP module in a period of time, then it is assumed that main DCP module breaks down, standby DCP module self switches to
Major state, and status information is write memory unit, taking over the work of former main DCP module, DCP provides warning information simultaneously, refers to
Showing that former main DCP module needs to change, the DCP module after replacing should be configured to standby state；3), switching, the DCP online of VDB-S module
The data that will send are given main VDB-S module and are broadcasted, and 2 VDB-R receive broadcast singal respectively and feed back to DCP, DCP
Contrast and send data and two reception data, if the most identical, then without switching, if two reception data are identical, but with
Transmitting data are different, then it is assumed that VDB-S fault, enable standby VDB-S by DCP and complete subsequent broadcast function, and arrange the latter
Being main state and store, DCP provides warning information simultaneously, and former main VDB-S is changed in prompting, and the VDB-S module after replacing should configure
For standby state；4), the online switching of VDB-R module, DCP contrast sends data and receives data with two, if send data with
It is identical that one of them receives data, receives data from another different, then it is assumed that VDB-S fault-free, receives different pieces of information pair
The VDB-R fault answered, DCP provides warning information simultaneously, and corresponding VDB-R is changed in prompting.
The invention has the beneficial effects as follows and can switch online in the case of not interrupting original business operation, remain whole
The state that individual equipment the most normally works, improves the reliability of equipment, will appear from after the module of fault replaces, being reduced to again
Initial master-slave redundancy state, follow-up breaking down can be gone switching again, be added the maintainability of whole equipment.
Accompanying drawing explanation
Fig. 1 is internal module connection figure of the present invention；
Fig. 2 is the connection figure of the present invention and other equipment of system；
Fig. 3 is the DCP module online switching flow figure of the present invention；
Fig. 4 is the VDB module online switching flow figure of the present invention；
Fig. 5 is that tradition ground strengthens system component devices connection figure.
Detailed description of the invention
As shown in Figure 1, 2, a kind of assembly can hot standby switching ground strengthen system earth station equipment, including two ground
Data processing module DCP1, DCP2, two very high frequency(VHF)s data transmission module VDB-S1, VDB-S2, and two very high frequency(VHF) data
Receiver module VDB-R1, VDB-R2, it is characterised in that: by original ground station equipment DCP and VDB modularity and unify, after unification
Equipment is referred to as data and processes and transceiver DCP-VDB, and its internal module annexation is logical between DCP1 module, DCP2 module
Crossing serial ports to be bi-directionally connected, VDB-S1 module, VDB-S2 module and VDB-R1 module, VDB-R2 module are two-way by serial ports respectively
Connect DCP1 module, DCP2 module；With in the annexation of other component devices of earth station, the DCP1 module of this in-one device,
DCP2 module is connected by serial ports is unidirectional respectively with RR1, RR2, RR3, RR4 equipment, VDB-S1 module, VDB-S2 module, VDB-
R1 module, VDB-R2 module are connected by radio-frequency cable and an antenna Ant respectively.Normal course of operation has a DCP mould
Block, VDB-S module, two VDB-R modules work simultaneously, and another one DCP, a VDB-S are in holding state, it is possible to
Switch at any time.
The specific works step of hot standby changing method is,
(1) preparation before work, as shown in Figure 1, 2,
1), DCP-VDB equipment is connected with GBAS earth station other equipment, including reference receiver RR(containing antenna), VDB transmitting-receiving
Antenna etc.；
2), arranging one of them DCP module and be main state, another one DCP module is standby state, status information by module from
The memory unit storage of body, module is restarted rear state and is still preserved；
3), arranging one of them VDB-S module and be main state, another one VDB-S module is standby state, and status information passes through mould
The memory unit of block self stores, and module is restarted rear state and still preserved, and VDB-R is without arranging module status；
(2) equipment runs
1), device power work, be configured to the DCP module of major state, VDB-S module and two VDB-R modules and start working,
Be configured to the standby DCP module of state, VDB-S module is in holding state, is ready to switching；
2), the online handoff procedure of DCP module is as it is shown on figure 3, the standby DCP module being in holding state monitors the heart of main DCP module
Hop-information, if (arranging) heart beating not receiving main DCP module, then it is assumed that main within a period of time according to system performance requirements
DCP module breaks down, and standby DCP module self switches to major state, and status information is write memory unit, takes over former master
The work of DCP module.DCP provides warning information simultaneously, indicates former main DCP module to need to change.DCP module after replacing should configure
For standby state；
3), the online handoff procedure of VDB-S module as shown in Figure 4, the data that DCP will send are given main VDB-S module and are carried out
Broadcast, two VDB-R receive broadcast singal respectively and feed back to DCP.DCP contrast sends data and receives data with two, if
The most identical, then without switching；If two reception data are identical, but different from launching data, then it is assumed that VDB-S fault, logical
Cross DCP to enable standby VDB-S and complete subsequent broadcast function, and the latter is set is main state and stores.DCP provides alarm letter simultaneously
Breath, former main VDB-S is changed in prompting.VDB-S module after replacing should be configured to standby state；
4), the online handoff procedure of VDB-R module as shown in Figure 4, DCP contrast sends data and receives data with two, if sent out
Send data to receive data with one of them identical, receive data from another different, then it is assumed that VDB-S fault-free, receive not
With the VDB-R fault that data are corresponding.DCP provides warning information simultaneously, and corresponding VDB-R is changed in prompting.
It is characterized in that:
The present invention is to tradition GBAS system earth station three nucleus equipment (DCP, VDB-S, VDB-R) modularitys as shown in Figure 5
And carried out Integration Design, it is an equipment after unification, it is achieved thereby that
1, integrated operation state controls.
2, redundancy backup and switching online.
3, the hot standby switching of equipment comprising modules is uniformly controlled by DCP.
4, after changing malfunctioning module, equipment heat of reduction is for state.
Claims (2)
1. assembly can hot standby switching ground strengthen a system earth station equipment, including two ground data processing modules
DCP1, DCP2, two very high frequency(VHF)s data transmission module VDB-S1, VDB-S2, and two very high frequency(VHF) data reception module VDB-
R1, VDB-R2, it is characterised in that: by tradition earth station equipment DCP, VDB-S and VDB-R modularity and unify, setting after unification
Standby referred to as data process and transceiver DCP-VDB, and its internal module annexation is to pass through between DCP1 module, DCP2 module
Serial ports is bi-directionally connected, and VDB-S1 module, VDB-S2 module and VDB-R1 module, VDB-R2 module are respectively by the two-way company of serial ports
Connect DCP1 module, DCP2 module；With in the annexation of other component devices of earth station, the DCP1 module of this in-one device,
DCP2 module is connected by serial ports is unidirectional respectively with RR1, RR2, RR3, RR4 equipment, VDB-S1 module, VDB-S2 module, VDB-
R1 module, VDB-R2 module are connected by radio-frequency cable and an antenna Ant respectively, have a DCP mould in normal course of operation
Block, VDB-S module, two VDB-R modules work simultaneously, and another one DCP, a VDB-S are in holding state, it is possible to
Switch at any time.
2. one kind use described in claim 1 can hot standby switching ground strengthen system earth station equipment hot standby switching side
Method, it is characterised in that: the specific works step of hot standby changing method is,
(1) preparation
1), DCP-VDB equipment is connected with GBAS earth station other equipment, including reference receiver RR(containing antenna), VDB transmitting-receiving
Antenna etc.；
2), arranging one of them DCP module and be main state, another one DCP module is standby state, status information by module from
The memory unit storage of body, module is restarted rear state and is still preserved；
3), arranging one of them VDB-S module and be main state, another one VDB-S module is standby state, and status information passes through mould
The memory unit storage of block self, module is restarted rear state and is still preserved；
VDB-R is without arranging module status；
Equipment runs
1), device power work, be configured to the DCP module of major state, VDB-S module and two VDB-R modules and start working,
Be configured to the standby DCP module of state, VDB-S module is in holding state, is ready to switching；
2), DCP module switches online
The standby DCP module being in holding state monitors the heartbeat message of main DCP module, if arranging one according to system performance requirements
Not receiving the heart beating of main DCP module in the section time, then it is assumed that main DCP module breaks down, standby DCP module self switches to master
State, and status information is write memory unit, taking over the work of former main DCP module, DCP provides warning information simultaneously, instruction
Former main DCP module needs to change, and the DCP module after replacing should be configured to standby state；
3), the online switching of VDB-S module
The data that DCP will send are given main VDB-S module and are broadcasted, and two VDB-R receive broadcast singal respectively and feed back
Send data to DCP, DCP contrast and receive data with two, if the most identical, then without switching；If two receive data
Identical, but different from launching data, then it is assumed that VDB-S fault, enable standby VDB-S by DCP and complete subsequent broadcast function, and
Arrange the latter be main state and store；
DCP provides warning information simultaneously, and former main VDB-S is changed in prompting, and the VDB-S module after replacing should be configured to standby state；
4), the online switching of VDB-R module
DCP contrasts and sends data and two reception data, if it is identical, with another with one of them reception data to send data
Reception data are different, then it is assumed that VDB-S fault-free, receive the VDB-R fault that different pieces of information is corresponding, and DCP provides alarm simultaneously
Information, corresponding VDB-R is changed in prompting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372443.2A CN105866809A (en) | 2016-05-31 | 2016-05-31 | Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372443.2A CN105866809A (en) | 2016-05-31 | 2016-05-31 | Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105866809A true CN105866809A (en) | 2016-08-17 |
Family
ID=56641689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610372443.2A Pending CN105866809A (en) | 2016-05-31 | 2016-05-31 | Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105866809A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111427074A (en) * | 2020-06-10 | 2020-07-17 | 天津七一二通信广播股份有限公司 | GBAS-based high-reliability time system service equipment |
| CN112929833A (en) * | 2019-12-06 | 2021-06-08 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN113805198A (en) * | 2021-08-13 | 2021-12-17 | 中国航空无线电电子研究所 | Satellite measurement processor |
| CN116506526A (en) * | 2023-03-23 | 2023-07-28 | 航天行云科技有限公司 | Satellite data processing method and system based on configurable protocol parser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198272A (en) * | 1996-07-19 | 1998-11-04 | 蜂窝视觉技术及电讯有限公司 | Dual transmitter arrangement with back-up switching |
| CN101893713A (en) * | 2010-07-23 | 2010-11-24 | 中国电子科技集团公司第二十研究所 | Device and method for monitoring release information performance of local area augmentation system |
| CN102540222A (en) * | 2010-11-15 | 2012-07-04 | 日本电气株式会社 | Threshold determining apparatus, method, and procedure |
| US20130321201A1 (en) * | 2012-06-01 | 2013-12-05 | Honeywell International Inc. | Systems and methods for the selection of antennas in aircraft navigation systems |
| CN205809308U (en) * | 2016-05-31 | 2016-12-14 | 天津七一二通信广播股份有限公司 | A kind of assembly can hot standby switching ground strengthen system earth station equipment |
-
2016
- 2016-05-31 CN CN201610372443.2A patent/CN105866809A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198272A (en) * | 1996-07-19 | 1998-11-04 | 蜂窝视觉技术及电讯有限公司 | Dual transmitter arrangement with back-up switching |
| CN101893713A (en) * | 2010-07-23 | 2010-11-24 | 中国电子科技集团公司第二十研究所 | Device and method for monitoring release information performance of local area augmentation system |
| CN102540222A (en) * | 2010-11-15 | 2012-07-04 | 日本电气株式会社 | Threshold determining apparatus, method, and procedure |
| US20130321201A1 (en) * | 2012-06-01 | 2013-12-05 | Honeywell International Inc. | Systems and methods for the selection of antennas in aircraft navigation systems |
| CN205809308U (en) * | 2016-05-31 | 2016-12-14 | 天津七一二通信广播股份有限公司 | A kind of assembly can hot standby switching ground strengthen system earth station equipment |
Non-Patent Citations (2)
| Title |
|---|
| 曾思弘: "GBAS技术特征与应用", 《科技通报》 * |
| 王国强: "民航气象多普勒天气雷达双机热备设计浅析", 《山东工业技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929833A (en) * | 2019-12-06 | 2021-06-08 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN112929833B (en) * | 2019-12-06 | 2022-05-06 | 中移(上海)信息通信科技有限公司 | Data distribution system and method |
| CN111427074A (en) * | 2020-06-10 | 2020-07-17 | 天津七一二通信广播股份有限公司 | GBAS-based high-reliability time system service equipment |
| CN113805198A (en) * | 2021-08-13 | 2021-12-17 | 中国航空无线电电子研究所 | Satellite measurement processor |
| CN116506526A (en) * | 2023-03-23 | 2023-07-28 | 航天行云科技有限公司 | Satellite data processing method and system based on configurable protocol parser |
| CN116506526B (en) * | 2023-03-23 | 2024-05-07 | 航天行云科技有限公司 | Satellite data processing method and system based on configurable protocol parser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105891846A (en) | High-reliability base reinforcing system ground station equipment and online switching method | |
| CN205809303U (en) | A kind of high reliability ground strengthens system earth station equipment | |
| CN105866809A (en) | Ground-based augmentation system ground station equipment with assemblies having hot standby switching function and hot standby switching method | |
| EP2015473B1 (en) | Reconfigurable aircraft radio communications system | |
| CN106933094B (en) | Dual-redundancy airborne flight control computer | |
| JP6623136B2 (en) | Aircraft tracker controller | |
| US20090196201A1 (en) | Switching device adapted to switch an aircraft wireless network from a maintenance configuration to a commercial configuration and vice-versa | |
| CN103323825B (en) | Fault softening method of secondary radar system | |
| CN113917495B (en) | Beidou GBAS-based multi-frequency-point multi-constellation high-reliability autonomous monitoring method and equipment | |
| CN105182944A (en) | Full digital solid-state power distribution management system and method for unmanned plane | |
| CN108781393B (en) | Enhanced VHF link communication method | |
| CN113448352B (en) | Double-machine control system of large unmanned aerial vehicle command control station | |
| US20170247118A1 (en) | Systems and Methods for Providing Emergency Location Functionality | |
| CN106950992A (en) | A kind of unmanned plane flies control redundant system and its method | |
| CN114978989B (en) | Space application load control method | |
| CN205809308U (en) | A kind of assembly can hot standby switching ground strengthen system earth station equipment | |
| US8560028B1 (en) | Antenna functionality management router controlling the transmit-receive modes of multiple antennas | |
| CN106292589B (en) | A kind of redundancy management method of the manual intervention applied to unmanned plane | |
| CN112147880B (en) | Remote control instruction selection control method | |
| CN111194061B (en) | Heterogeneous network high-performance switching method applied to airborne broadband communication | |
| EP3595193B1 (en) | Methods and systems for controlling operation of satellite data units of an aircraft | |
| US11981408B2 (en) | Method and device for data transmission on board a watercraft | |
| KR101752454B1 (en) | Data loss prevention system when automatic switching of fiber channel duplex communication channel and method thereof | |
| EP3618307B1 (en) | Communication management unit with configurable interface | |
| CN108627853B (en) | Positioning time service system 1+1 protection system and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |
|
| WD01 | Invention patent application deemed withdrawn after publication |