CN110505538A - A kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type - Google Patents
A kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type Download PDFInfo
- Publication number
- CN110505538A CN110505538A CN201910805169.7A CN201910805169A CN110505538A CN 110505538 A CN110505538 A CN 110505538A CN 201910805169 A CN201910805169 A CN 201910805169A CN 110505538 A CN110505538 A CN 110505538A
- Authority
- CN
- China
- Prior art keywords
- module
- power supply
- intrinsic safety
- double
- gigabit
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/028—Subscriber network interface devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/03—Power distribution arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/10—Exchange station construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Optical Communication System (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention belongs to ethernet device technical fields; a kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type, comprising: power supply delay startup module, intrinsic safety type DC-DC power module, intrinsic safety second protection module, power supply control module, ARM framework SoC module, double-frequency wireless baseband radio module, memory module, clock module, optical port power supply control module, gigabit exchange chip module, fiber interface module and RJ45 interface module.The present invention realizes transmission rate height, meets the needs of modernization underground communica tion.
Description
Technical field
The invention belongs to 8 mouthfuls of gigabit double frequency high-power wireless of ethernet device technical field more particularly to a kind of intrinsic safety type
Interchanger.
Background technique
Coal mine comprehensive automation is the guarantee that coal mine is highly efficient and productive and keeps the safety in production, and the underground coal mine network platform is real
The basis of existing coal mine comprehensive automation；Currently, many coal mines in China all establish Industrial Ethernet, equipped for down-hole coal excavation
And the monitoring of subsurface environment parameter；Most of scheme is all to take underground wired ethernet mode, is arranged in main roadway, no
Entire underground can be covered；It cannot achieve the monitoring, such as coalcutter, locomotive etc. of movement dynamoelectric equipment；The coal mine in China is comprehensive certainly
Dynamicization project could not cover fully-mechanized mining working, can not achieve the long-range monitoring of fully mechanized mining equipment, wireless exchange board then occur
Scheme replaces cable convertor mode, using 100,000,000 single-frequency wireless network modes (100,000,000 uplinks+wireless 100,000,000 downlink).
The shortcoming of downhole wireless interchanger is mainly reflected in the following at present:
A, transmission rate is not high, 100,000,000 port uplink communications, lower behavior only support IEEE802.11b/g single-frequency 2.4G without
Line equipment is connected to video camera or communication control unit with radio transmission-receiving function.
B, the theoretical transmission rate of IEEE802.11b/g single-frequency 2.4G is 54Mbps, and uplink port only has 100,000,000, maximum
Handling capacity is up to one-way transmission 20Mbps, transmitted in both directions 26Mbps, with the development and equipment of underground communica tion monitoring technology
Increase, the data volume to be transmitted also is steeply rising, and traditional wireless exchange board is no longer satisfied modernization underground communica tion
Demand.
Intrinsic safety electric source used in underground is distinctly claimed (GB3836.4 intrinsic safety to Overall Power Consumption and inrush current
Explosion-proof criteria), load equipment power consumption does not allow more than 18W generally, this requirement limits most of common wireless exchange board in well
Under use.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type, transmission
Rate is high, meets the needs of modernization underground communica tion.
The embodiments of the present invention are implemented as follows:
A kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type, comprising: power supply delay startup module, intrinsic safety type DC-DC
Power module, power supply control module, ARM framework SoC module, double-frequency wireless baseband radio module, is deposited at intrinsic safety second protection module
Store up module, clock module, optical port power supply control module, gigabit exchange chip module, fiber interface module and RJ45 interface module；
Power supply delay startup module external power supply, power supply delay startup module are connect with intrinsic safety type DC-DC power module, intrinsic safety type
DC-DC power module is connect with power supply control module, and power supply is managed module and connect with optical port power supply control module, optical port power supply pipe
Control module is connect with fiber interface module, and intrinsic safety type DC-DC power module is connect with intrinsic safety second protection module, intrinsic safety type DC-
DC power module is connect with gigabit exchange chip module, gigabit exchange chip module respectively with fiber interface module, RJ45 interface
Module, power supply control module are connected with ARM framework SoC module, and intrinsic safety type DC-DC power module and ARM framework SoC module connect
It connects, ARM framework SoC module is connect with double-frequency wireless baseband radio module, memory module and clock module respectively；
Power supply is via power supply delay startup module, intrinsic safety type DC-DC power module, power supply control module and intrinsic safety second protection
Module converts out suitable voltage respectively to ARM framework SoC module, memory module, clock by intrinsic safety type DC-DC power module
Module, double-frequency wireless baseband radio module, optical port power supply manage circuit, gigabit exchange chip module for power supply；ARM framework SoC mould
After the completion of block, memory module, clock module, double-frequency wireless baseband radio module, gigabit exchange chip modular circuit electrifying startup,
Circuit is managed by optical port power supply, is successively powered to each fiber interface module；Fiber interface module or RJ45 interface module connect
It connects gigabit exchange chip module and is respectively used to processing RJ45 electric signal or optical fiber optical signal, then pass through ARM framework SoC module, double
Frequency radio base band radio-frequency module is converted into radio frequency signal, to complete the conversion of wired and wireless data, double-frequency wireless base band
The antenna for receiving or emitting radio frequency signal is connected on radio-frequency module；
The fiber interface module includes 8 gigabit ethernet interfaces, and RJ45 interface module includes 8 interfaces, and gigabit is handed over
Change the communication that chip module supports wired 8 gigabit ethernet interfaces and RJ45 interface module, double-frequency wireless baseband radio
Module supports the communication of IEEE802.11a/b/g/n/ac double frequency 2.4G, 5G downlink wireless, and 2.4G is up to one-way transmission
200Mbps, transmitted in both directions 220Mbps, 5G are up to one-way transmission 500Mbps, transmitted in both directions 600Mbps；Double-frequency wireless base band
The roaming switch time of radio-frequency module is less than 0.5 millisecond.
Interchanger transmission rate of the invention is high, and 1,000,000,000 port uplink communications support IEEE802.11a/b/g/n/ac
The theoretical transmission rate of the communication of double frequency 2.4G, 5G downlink wireless, 2.4G is 300Mbps, and the theoretical transmission rate of 5G is
867Mbps, in addition uplink port is 1,000,000,000 ports, so maximum throughput 2.4G is up to one-way transmission 200Mbps, it is two-way
220Mbps is transmitted, 5G is up to one-way transmission 500Mbps, transmitted in both directions 600Mbps, with the hair of underground communica tion monitoring technology
Exhibition increases with equipment, and the data volume to be transmitted also is steeply rising, and the present invention can fully meet modernization underground communica tion
Demand；In addition the monitoring, such as coalcutter, locomotive etc. that movement dynamoelectric equipment is realized in underground, install this wireless exchange board, can be with
Roaming, data acquisition, transmission video signal, wireless location etc., roaming are wirelessly realized between wireless exchange board
Switching time is less than 0.5 millisecond, and the transmission that will not influence voice and video etc., achievees the effect that seamless roam；With transmission
Speed is fast, performance is stable, high reliablity, stable signal transmission and wide coverage, networking are convenient, convenient for safeguarding and software upgrading
The advantages that.
Detailed description of the invention
Fig. 1 is 8 mouthfuls of gigabit double frequency high-power wireless interchanger schematic diagrames of a kind of intrinsic safety type of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment:
As shown in Figure 1, a kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type, comprising: power supply delay startup module,
Intrinsic safety type DC-DC power module, intrinsic safety second protection module, power supply manage module, ARM framework SoC module, double-frequency wireless base band
Radio-frequency module, memory module, clock module, optical port power supply control module, gigabit exchange chip module, fiber interface module and
RJ45 interface module；
Power supply delay startup module external power supply, power supply delay startup module are connect with intrinsic safety type DC-DC power module, intrinsic safety type
DC-DC power module is connect with power supply control module, and power supply is managed module and connect with optical port power supply control module, optical port power supply pipe
Control module is connect with fiber interface module, and intrinsic safety type DC-DC power module is connect with intrinsic safety second protection module, intrinsic safety type DC-
DC power module is connect with gigabit exchange chip module, gigabit exchange chip module respectively with fiber interface module, RJ45 interface
Module, power supply control module are connected with ARM framework SoC module, and intrinsic safety type DC-DC power module and ARM framework SoC module connect
It connects, ARM framework SoC module is connect with double-frequency wireless baseband radio module, memory module and clock module respectively；
Power supply is via power supply delay startup module, intrinsic safety type DC-DC power module, power supply control module and the secondary guarantor of intrinsic safety
Shield module by intrinsic safety type DC-DC power module convert out suitable voltage respectively to ARM framework SoC module, memory module,
Clock module, double-frequency wireless baseband radio module, optical port power supply manage circuit, gigabit exchange chip module for power supply；ARM framework
SoC module, memory module, clock module, double-frequency wireless baseband radio module, gigabit exchange chip modular circuit electrifying startup are complete
Cheng Hou manages circuit by optical port power supply, successively powers to each fiber interface module；Fiber interface module or RJ45 interface mould
Block connection gigabit exchange chip module is respectively used to processing RJ45 electric signal or optical fiber optical signal, then passes through ARM framework SoC mould
Block, double-frequency wireless baseband radio module are converted into radio frequency signal, to complete the conversion of wired and wireless data, double-frequency wireless
The antenna for receiving or emitting radio frequency signal is connected in baseband radio module；
The fiber interface module includes 8 gigabit ethernet interfaces, and RJ45 interface module includes 8 interfaces, and gigabit is handed over
Change the communication that chip module supports wired 8 gigabit ethernet interfaces and RJ45 interface module, double-frequency wireless baseband radio
Module supports the communication of IEEE802.11a/b/g/n/ac double frequency 2.4G, 5G downlink wireless, and 2.4G is up to one-way transmission
200Mbps, transmitted in both directions 220Mbps, 5G are up to one-way transmission 500Mbps, transmitted in both directions 600Mbps；Double-frequency wireless base band
The roaming switch time of radio-frequency module is less than 0.5 millisecond.
In Fig. 1, a kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type, including power supply delay startup module, intrinsic safety type
DC-DC power module, intrinsic safety second protection module, power supply manage module, ARM framework SoC module, double-frequency wireless baseband radio
Module, memory module, clock module, optical port power supply control module, gigabit exchange chip module, fiber interface module, RJ45 connect
Mouth mold block etc., concrete principle is as follows:
(1) intrinsic safety electric source is via power supply delay startup module, intrinsic safety type DC-DC power module, power supply control module and intrinsic safety
Second protection module converts out suitable voltage respectively to ARM framework SoC module, memory module, double by voltage transformation module
Frequency radio base band radio-frequency module, optical port power supply manage circuit, gigabit exchange chip module for power supply.
(2) ARM framework SoC module, memory module, clock module, double-frequency wireless baseband radio module, gigabit exchange chip
After the completion of modular circuit electrifying startup, circuit is managed by optical port power supply, successively powers to each optical module, reduces optical mode to the greatest extent
Block is powered on the influence of the dash current of intrinsic safety electric source.
(3) double-frequency wireless baseband radio module, memory module, clock module, gigabit exchange chip module respectively with ARM frame
The connection of structure SoC module；Fiber interface module or RJ45 interface module connection exchange chip be respectively used to processing RJ45 electric signal or
Optical fiber optical signal, then radio frequency signal is converted by ARM framework SoC module, radio base band radio-frequency module, it is wired to complete
With the conversion of wireless data, the antenna for receiving or emitting radio frequency signal is connected on radio base band radio-frequency module.
Gigabit double frequency high-power wireless interchanger of the invention provides most 8 gigabit ethernet interfaces, and photoelectric port can spirit
Living configuration (such as: 4 electric 4 light, 6 electric 2 light etc.), using wireless location technology, realize the positioning of industrial field device and personnel,
Data supporting is provided for industrial production automation, the location technology of this equipment is a wireless data in entire positioning system
Picker is detected by multipoint positioning (multiple equipment) and receives the signal strength from wireless tag, passes through software algorithm meter
The distance relation and position, wireless location accuracy for calculating wireless tag reach within several meters.Utilize controllable substep electrification circuit
(power supply control module), power supply manage functions of modules and principle i.e. power supply process described above, give each unit step by step
And optical module powers on, and avoids all optical modules while powering on excessive to the dash current of intrinsic safety electric source, leads to intrinsic safety electric source overcurrent
Protection, solves this gigabit double frequency high-power wireless switched circuit and the excessive caused intrinsic safety starting of multiple optical module mixed loads is protected
Shield problem.
Interchanger transmission rate of the invention is high, and 1,000,000,000 port uplink communications support IEEE802.11a/b/g/n/ac
The theoretical transmission rate of the communication of double frequency 2.4G, 5G downlink wireless, 2.4G is 300Mbps, and the theoretical transmission rate of 5G is
867Mbps, in addition uplink port is 1,000,000,000 ports, so maximum throughput 2.4G is up to one-way transmission 200Mbps, it is two-way
220Mbps is transmitted, 5G is up to one-way transmission 500Mbps, transmitted in both directions 600Mbps, with the hair of underground communica tion monitoring technology
Exhibition increases with equipment, and the data volume to be transmitted also is steeply rising, and the present invention can fully meet modernization underground communica tion
Demand；In addition the monitoring, such as coalcutter, locomotive etc. that movement dynamoelectric equipment is realized in underground, install this wireless exchange board, can be with
Roaming, data acquisition, transmission video signal, wireless location etc., roaming are wirelessly realized between wireless exchange board
Switching time is less than 0.5 millisecond, and the transmission that will not influence voice and video etc., achievees the effect that seamless roam；With transmission
Speed is fast, performance is stable, high reliablity, stable signal transmission and wide coverage, networking are convenient, convenient for safeguarding and software upgrading
The advantages that.
Technical term explanation:
SoC: systems-on-a-chip (System on Chip)
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (1)
1. a kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type characterized by comprising power supply delay startup module, sheet
Peace type DC-DC power module, intrinsic safety second protection module, power supply control module, ARM framework SoC module, double-frequency wireless base band are penetrated
Frequency module, memory module, clock module, optical port power supply control module, gigabit exchange chip module, fiber interface module and RJ45
Interface module；
Power supply delay startup module external power supply, power supply delay startup module are connect with intrinsic safety type DC-DC power module, intrinsic safety type DC-
DC power module is connect with power supply control module, and power supply is managed module and connect with optical port power supply control module, the control of optical port power supply
Module is connect with fiber interface module, and intrinsic safety type DC-DC power module is connect with intrinsic safety second protection module, intrinsic safety type DC-DC
Power module is connect with gigabit exchange chip module, gigabit exchange chip module respectively with fiber interface module, RJ45 interface mould
Block, power supply control module are connected with ARM framework SoC module, and intrinsic safety type DC-DC power module is connect with ARM framework SoC module,
ARM framework SoC module is connect with double-frequency wireless baseband radio module, memory module and clock module respectively；
Power supply is converted out properly via power supply delay startup module, intrinsic safety second protection module by intrinsic safety type DC-DC power module
Voltage give ARM framework SoC module, memory module, clock module, double-frequency wireless baseband radio module, optical port power supply pipe respectively
Control circuit, gigabit exchange chip module for power supply；ARM framework SoC module, memory module, clock module, double-frequency wireless baseband radio
After the completion of module, gigabit exchange chip modular circuit electrifying startup, circuit is managed by optical port power supply, is successively connect to each optical fiber
Mouth module for power supply；Fiber interface module or RJ45 interface module connection gigabit exchange chip module are respectively used to processing RJ45 telecommunications
Number or optical fiber optical signal, then radio frequency signal is converted by ARM framework SoC module, double-frequency wireless baseband radio module, with
The conversion of wired and wireless data is completed, connection is for receiving or emitting radio frequency signal in double-frequency wireless baseband radio module
Antenna；
The fiber interface module includes 8 gigabit ethernet interfaces, and RJ45 interface module includes 8 interfaces, and gigabit exchanges core
Piece module supports the communication of wired 8 gigabit ethernet interfaces and RJ45 interface module, double-frequency wireless baseband radio module
Support the communication of IEEE802.lla/b/g/n/ac double frequency 2.4G, 5G downlink wireless, 2.4G is up to one-way transmission 200Mbps, double
To transmission 220Mbps, 5G is up to one-way transmission 500Mbps, transmitted in both directions 600Mbps；Double-frequency wireless baseband radio module
The roaming switch time is less than 0.5 millisecond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805169.7A CN110505538B (en) | 2019-08-26 | 2019-08-26 | Intrinsic safety type 8-port kilomega dual-frequency high-power wireless switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805169.7A CN110505538B (en) | 2019-08-26 | 2019-08-26 | Intrinsic safety type 8-port kilomega dual-frequency high-power wireless switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110505538A true CN110505538A (en) | 2019-11-26 |
| CN110505538B CN110505538B (en) | 2021-08-24 |
Family
ID=68590230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910805169.7A Active CN110505538B (en) | 2019-08-26 | 2019-08-26 | Intrinsic safety type 8-port kilomega dual-frequency high-power wireless switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110505538B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102143613A (en) * | 2011-04-11 | 2011-08-03 | 陕西开放电子科技有限公司 | Intelligent type wireless wideband multi-path-source IOT (Internet of Things) router |
| US20120263256A1 (en) * | 2006-02-15 | 2012-10-18 | Khurram Waheed | Linearization of a transmit amplifier |
| CN203387691U (en) * | 2013-08-08 | 2014-01-08 | 深圳市宏成数字科技股份有限公司 | Wireless router |
| CN204119269U (en) * | 2014-10-23 | 2015-01-21 | 厦门福信光电集成有限公司 | A kind of gigabit switch |
| CN206212015U (en) * | 2016-09-13 | 2017-05-31 | 深圳市海硕科技有限公司 | The power circuit and interchanger of a kind of interchanger |
| CN207339642U (en) * | 2017-11-03 | 2018-05-08 | 纳英诺尔科技（深圳）有限公司 | A kind of POE interchangers DC power supply |
| CN208675263U (en) * | 2018-05-07 | 2019-03-29 | 珠海世纪鼎信网络科技有限公司 | Interchanger with protective effect |
-
2019
- 2019-08-26 CN CN201910805169.7A patent/CN110505538B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120263256A1 (en) * | 2006-02-15 | 2012-10-18 | Khurram Waheed | Linearization of a transmit amplifier |
| CN102143613A (en) * | 2011-04-11 | 2011-08-03 | 陕西开放电子科技有限公司 | Intelligent type wireless wideband multi-path-source IOT (Internet of Things) router |
| CN203387691U (en) * | 2013-08-08 | 2014-01-08 | 深圳市宏成数字科技股份有限公司 | Wireless router |
| CN204119269U (en) * | 2014-10-23 | 2015-01-21 | 厦门福信光电集成有限公司 | A kind of gigabit switch |
| CN206212015U (en) * | 2016-09-13 | 2017-05-31 | 深圳市海硕科技有限公司 | The power circuit and interchanger of a kind of interchanger |
| CN207339642U (en) * | 2017-11-03 | 2018-05-08 | 纳英诺尔科技（深圳）有限公司 | A kind of POE interchangers DC power supply |
| CN208675263U (en) * | 2018-05-07 | 2019-03-29 | 珠海世纪鼎信网络科技有限公司 | Interchanger with protective effect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110505538B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103812710B (en) | Power communication communication terminal special | |
| CN101902805A (en) | Multi-radio frequency mining multifunctional wireless Mesh router device and control system thereof | |
| CN203618131U (en) | Mining wireless communication system | |
| CN201527712U (en) | Green wireless control traffic light system based on solar and wind power supply | |
| CN203872191U (en) | TD-LTE area communication network distributed intelligent management system | |
| CN104486170B (en) | A kind of new type mining integrated access system | |
| CN205212878U (en) | Novel charge stake intelligent network deployment equipment | |
| CN101932131A (en) | Heterogeneous multi-channel wireless sensor underground detection system | |
| CN110505538A (en) | A kind of 8 mouthfuls of gigabit double frequency high-power wireless interchangers of intrinsic safety type | |
| CN208285279U (en) | A kind of header box acquisition and emitter based on NBIOT | |
| CN110460986A (en) | Confined space long range multi-media radio emergency communication system and method | |
| CN203596922U (en) | Portable ad hoc network wireless intercom system | |
| CN110474855A (en) | A kind of 8 mouthful of 10,000,000,000 double frequency high-power wireless interchanger of intrinsic safety type | |
| CN110351206A (en) | A kind of intrinsic safety type 100,000,000 and gigabit double frequency high-power wireless interchanger | |
| CN206961312U (en) | Double concentrator harvesters of multiple-in-one | |
| CN214481295U (en) | Mining ann's type wiFi6 wireless base station | |
| CN110519868A (en) | A kind of intrinsic safety type double frequency high-power wireless access device | |
| Zhang | Research on the architecture of internet of things applied in coal mine | |
| CN210381197U (en) | Intrinsic safety type 5-port kilomega dual-frequency high-power wireless switch | |
| CN203722835U (en) | Mining intrinsically safe type wireless base station | |
| CN204031173U (en) | A kind of broad band photoelectrical electric network bridge | |
| CN203722660U (en) | Explosion-proof and intrinsically safe wireless network manager | |
| CN107466096B (en) | Street lamp type small cell wireless access network intelligent control system based on cloud architecture | |
| CN203722837U (en) | Mining explosion-proof and intrinsically safe type wireless base station | |
| CN202918289U (en) | Network device based on electric power line communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |