CN208798245U - A kind of multimode network access device - Google Patents
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Abstract
The utility model provides a kind of multimode network access device, it include: processor chips and the DSL module, LTE module and the WAN module that are electrically connected with processor chips, at least one of DSL module, LTE module and WAN module are controllably connect with outbound communication by own interfaces, processor chips include access selecting unit, and wire-speed detection unit and network quality detection unit, access selecting unit select one and accessing user's network according to the data that wire-speed detection unit and network quality detection unit detect from LTE module, DSL module and WAN module.The multimode network access device can connect extranets by way of DSL, LTE or WAN, and can wherein select optimal access way or preset network insertion priority, to guarantee that the network connection conditions of user are continuously in optimum level.
Description
Technical field
The utility model relates to wireless communication technology field, in particular to a kind of multimode network access device.
Background technique
Internet be one can mutual communication, the interaction platform mutually participated in, user can pass through network insertion
Equipment establishes internet connection, surfs the web.The mode for connecting internet is varied, and ordinary family user is come
It says, internet can be connected to by more than one mode, but existing network access equipment is usually confined to a kind of network
Access way, therefore be not easy to adopt in user and surf the Internet by some way or since certain external factor cause this kind of mode that can not apply
When row, will lead to user when needed can not surf the Internet or user needs to re-establish network company by other network access equipments
It connects, is unfavorable for the online experience of user.
Utility model content
(1) purpose of utility model
To overcome above-mentioned at least one defect of the existing technology, the utility model provides following technical scheme.
(2) technical solution
The utility model discloses a kind of multimode network access devices, comprising: processor chips and with the processing
DSL module, LTE module and the WAN module of device chip electrical connection；
At least one of the DSL module, the LTE module and described WAN module by own interfaces controllably with
Outbound communication connection；
The processor chips include accessing selecting unit and wire-speed detection unit and/or network quality detection unit,
The data that the access selecting unit is detected according to the wire-speed detection unit and/or the network quality detection unit are from described
One and accessing user's network are selected in LTE module, the DSL module and the WAN module.
In a kind of possible embodiment, the DSL module includes: ADSL unit and/or VDSL unit.
In a kind of possible embodiment, which further includes PCIe slot, the LTE module peace
Loaded on the PCIe slot, it is electrically connected by PCIe bus with the processor chips.
In a kind of possible embodiment, the PCIe slot is also equipped with the SIM card being electrically connected with the LTE module and inserts
Slot.
In a kind of possible embodiment, the PCIe slot is electrically connected by usb bus with the processor chips.
In a kind of possible embodiment, which further includes WiFi module, and the WiFi module includes:
At least one 2.4G radio-cell, and/or
At least one 5G radio-cell, and/or
At least one concurrent radio-cell of 2.4G/5G double frequency.
In a kind of possible embodiment, the WiFi module is electrically connected by PCIe bus with the processor chips.
In a kind of possible embodiment, the WiFi module further include: RF front-end module, signal collect unit and
Mutiple antennas, the RF front-end module are electrically connected with radio-cell corresponding in the WiFi module, and the signal collects list
It is first to be electrically connected with the RF front-end module and the multiple antenna.
In a kind of possible embodiment, the multimode network access device further include: at least one ethernet module, often
A ethernet module includes the network transformer connecting with the processor chips, each network transformer and corresponding
Telecommunications outlet connection.
In a kind of possible embodiment, the multimode network access device further include: LAN module, the LAN module with
The processor chips electrical connection.
In a kind of possible embodiment, the multimode network access device further include: SLIC module, the SLIC module
Including slic circuit, the slic circuit is connect with the processor chips and voip network respectively.
In a kind of possible embodiment, the multimode network access device further include: flash memory, the flash
Memory is electrically connected with the processor chips.
In a kind of possible embodiment, the multimode network access device further include: DDR3 memory, the DDR3 memory
It is electrically connected with the processor chips.
(3) beneficial effect
Multimode network access device provided by the utility model, has the following beneficial effects:
1, extranets can be connected by way of DSL, LTE or WAN.
2, optimal access way can be selected or preset network insertion priority, to guarantee that the network of user connects
Narrow bars part is continuously in optimum level.
3, local area network can be connected, and is dialed network telephone.
Detailed description of the invention
It is exemplary below with reference to the embodiment of attached drawing description, it is intended to it is used for explanation and illustration the utility model, without
It can be interpreted as the limitation to the protection scope of the utility model.
Fig. 1 is the structural block diagram of multimode network access device first embodiment provided by the utility model.
Specific embodiment
To keep the purposes, technical schemes and advantages of the utility model implementation clearer, below in conjunction with the utility model
Attached drawing in embodiment, is further described in more detail the technical scheme in the embodiment of the utility model.
It should be understood that in the accompanying drawings, from beginning to end same or similar label indicate same or similar element or
Element with the same or similar functions.The embodiments are a part of the embodiments of the present invention, rather than whole
Embodiment, in the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.Based on this reality
It is obtained by those of ordinary skill in the art without making creative efforts every other with the embodiment in novel
Embodiment is fallen within the protection scope of the utility model.
The division of module, unit or assembly herein is only a kind of division of logic function, in actual implementation may be used
To there is other division modes, such as multiple modules and/or unit can be combined or are integrated in another system.As separation
The module of part description, unit, component are also possible to indiscrete may be physically separated.It is shown as a unit
Component can be physical unit, may not be physical unit, it can is located at a specific place, may be distributed over grid
In unit.Therefore some or all of units can be selected to realize the scheme of embodiment according to actual needs.
The first embodiment of multimode network access device provided by the utility model is described in detail below with reference to Fig. 1.This
Embodiment is mainly used in user's accessing external network, can select optimal access way or to preset network insertion preferential
Grade, to guarantee that the network connection conditions of user are continuously in optimum level.
As shown in Figure 1, multimode network access device provided in this embodiment mainly includes: processor chips, and
DSL module, LTE module and the WAN module being electrically connected with processor chips.
DSL (Digital Subscriber Line, digital subscriber line) is the transmission skill using telephone wire as transmission medium
Art combination.DSL access scheme can make full use of the phone that can be largely laid with without being transformed to telephone line
Local loop substantially reduces additional expense, is accessed using the internet that copper cable telephone wire provides higher rate.The multi-mode net
Network access device is connect by DSL module with indoor telephone line, and passes through telephone line accessing external network.Specifically, DSL is used
Two independent frequency bands, referred to as uplink and downlink frequency band.Upstream band is used for the communication from user terminal to telephone central office, under
Line frequency band is for the communication from telephone central office to user terminal.The signal that user terminal issues leads to after DSL Modem coding
It crosses telephone wire and passes to telecommunication bureau, as soon as later also phone can be passed to if it is voice signal and is handed over by a signal identification/separator
On changing planes, internet is just accessed if it is digital signal, makes a phone call and surfs the web to realize.
LTE (Long Term Evolution, long term evolution) technology introduces OFDM (Orthogonal Frequency
Division Multiplexing, orthogonal frequency division multiplexing) and MIMO (how defeated Multi-Input&Multi-Output, multi input be
The key technologies such as out) significantly increase spectrum efficiency and message transmission rate, support global mainstream 2G/3G frequency range and some new
Increase frequency range, thus frequency spectrum distribution is more flexible, capacity and covering are also obviously improved.The multimode network access device can also pass through
LTE module accessing external network.Specifically, LTE module is divided into radio frequency unit, digital baseband unit and power supply unit by function, may be used also
To include the functional circuitries such as clock circuit, reset circuit, clock signal and reset signal etc. are provided for each unit.LTE module
It is connect using PCIe Mini Card physical interface with mainboard, radio frequency connection uses U.FL-R-SMT-1 (80) 50ohm and antenna
Connection can make user terminal have wireless communication function, be connectable to any one LTE carrier network of the whole world.It is logical
It crosses FDD-LTE, TDD-LTE, TD-SCDMA, HSPA, UMTS, WCDMA, EVDO, EDGE, GPRS, GSM and realizes high-speed data connection
And positioning service, it is widely used in mobile broadband access scene.
WAN (Wide Area Network, wide area network) is also referred to as telenet, usually the very big physical extent of bridging, is covered
Range from tens kilometers to thousands of kilometers, it can connect multiple city or countries, or across several continents and can provide at a distance
Communication, forms international telecommunication network.The communication subnet of WAN net mainly uses packet-switch technology.The communicator of wide area network
Net can use public packet switching network, satellite communication network and wireless, packet-switched net, it will be distributed over the local of different regions
Net or computer system interconnect, and achieve the purpose that resource-sharing.The multimode network access device can also pass through WAN module
Accessing external network.
At least one of DSL module, LTE module and WAN module are controllably connect with outbound communication by own interfaces.
The interface that DSL module, LTE module and WAN module can be equipped with by itself is connect with outer net, can also there was only DSL module
The interface being equipped with by itself is connect with outer net, or the only interface and outer net that are equipped with by itself of LTE module and WAN module
Connection.Therefore, when user terminal and outer net are established and communicated to connect, at least one of above-mentioned three kinds of modules module energy is needed
It is enough to be connect at any time with outer net so that user terminal can getting online at any moment, also, in general, above-mentioned three kinds of modules can
It is enough connect at any time with outer net by respective link, so that user terminal according to circumstances therefrom can actively or passively select one kind
Networking mode is surfed the Internet.
Processor chips include access selecting unit, further include wire-speed detection unit and/or network quality detection unit, connect
Enter data that selecting unit is detected according to wire-speed detection unit and/or network quality detection unit from LTE module, DSL module and
One and accessing user's network are selected in WAN module.
If only DSL module can network, LTE module and WAN module before user terminal establishes outbound communication connection
Do not have networking condition, then processor chips directly select DSL module and establish network connection.
If above-mentioned three kinds of modules can be realized networking, then needs at this time before user terminal establishes outbound communication connection
The networking mode of three kinds of modules is selected, select one of module and networked in such a way that the module is corresponding.
The case where selection, has following several:
1, processor chips only include wire-speed detection unit, then before user terminal establishes outbound communication connection, processing
Device chip detects the network data transmission speed of above-mentioned multiple module by wire-speed detection unit, is transmitted according to instantaneous network data
Speed or the network data transmission speed in the short time select a wherein most fast module of network speed, and pass through the module
Network connection is established, it being capable of the quick Internet data when guaranteeing user's online.
2, processor chips only include network quality detection unit, then before user terminal establishes outbound communication connection,
Processor chips detect the network connection quality of above-mentioned multiple module by network quality detection unit, are connected according to instantaneous network
Stable case or the network connection stable case in the short time, selection is wherein connected to the network a most stable of module, and passes through
The module establishes network connection, to guarantee that the case where guaranteeing the stabilization of network connection when user's online, reducing network interruption occurs.
3, processor chips include wire-speed detection unit and network quality detection unit, then establish outer Netcom in user terminal
Before letter connection, processor chips detect the network connection quality of above-mentioned multiple module by network quality detection unit, simultaneously
The network connection quality of above-mentioned multiple module is detected also by network quality detection unit, and is passed simultaneously according to instantaneous network data
Defeated speed or network data transmission speed and instantaneous network stable connection situation in the short time or the network in the short time connect
Stable case is connect, the network priority of each module is comprehensively considered and be discharged, a kind of company is selected according to the height of network priority
The optimal module of mode is connect, and network connection is established by the module, requirement when meeting user's online to network.It is above-mentioned comprehensive
If closing the mode considered may is that the most fast module of network speed and the best module of network quality are same module, the module grid
Network highest priority can be according to preparatory if the most fast best module of module and network quality of network speed is not same module
The demand of setting is come the network priority that is ranked, or according to the difference of gap and the network quality quality of network speed speed between each module
Away from come the network priority that is ranked.
It should be noted that in above-mentioned three kinds of situations, with per family can in advance to the multimode network access device into
Row setting, the network priority for each module that is voluntarily ranked, when user needs to network later, multimode network access device can be by
It successively attempts to establish network connection according to above-mentioned preset network priority, until networking successfully.
Above-mentioned processor chips can use the SOC chip (system level chip) of VSPM340 model.Specifically, processor
Chip VSPM340 provides 6 gigabit Ethernet data-interfaces, the gigabit ethernet port physics being internally integrated including 5
Layer and 1 RGMII (simplifying gigabit medium independent interface) support IPv4 and IPv6 unicast based on wide area network, multicast and wide
Business stream statistics are broadcast, any one access interface of gigabit ethernet port physical layer as WAN module can configure by software.
It is understood that the multimode network access device further includes power module, for for equipment and its including
Each module for power supply.
In one embodiment, DSL module includes: ADSL unit and/or VDSL unit.ADSL(Asymmetric
Digital Subscriber Line), i.e. Asymmetrical Digital Subscriber Line belongs to one kind of DSL technology, and ADSL is provided upper
Capable and downlink bandwidth is asymmetric, and common telephone wire is divided into phone, uplink and downlink three using frequency multiplexing technique
Relatively independent channel, so as to avoid mutual interference.ADSL mainly faces family, and VDSL mainly faces enterprise.
VDSL (Very High Speed Digital Subscriber Line), i.e. Very High Speed Digital Subscriber Line are a kind of non-right
Claim DSL technology.VDSL technology uses frequency division multiplexing principle, and data-signal and phone audio signal use different frequency ranges, mutually not
Interference, online while, can dial or receive calls.
DSL module can include ADSL unit and VDSL unit simultaneously, with when user terminal is surfed the Internet by DSL module,
Message transmission rate, route selection can be selected than the demand of, transmission mode and working band etc. according to itself ADSL mode or
VDSL mode.
In one embodiment, the equipment is equipped with PCIe slot.PCIe(Peripheral Component
Interconnect Express) it is a kind of high speed serialization computer expansion bus standard, it is point-to-point that PCIe belongs to high speed serialization
Binary channels high bandwidth transmission, the equipment distribution connected exclusively enjoy bandwidth chahnel, do not share bus bandwidth.Above-mentioned LTE module installation
In the PCIe slot of the multimode network access device, it is electrically connected by PCIe bus with processor chips.
In one embodiment, PCIe slot is also equipped with the SIM card slot being electrically connected with LTE module.In SIM card slot
When being inserted with SIM card, LTE module cooperation SIM card is connected to the network.
In one embodiment, PCIe slot is electrically connected by usb bus with processor chips.Particularly, VSPM340
The processor chips of model support USB3.0 and USB2.0, and the PCIe slot in the present embodiment passes through USB2.0 and processor chips
Electrical connection.
In one embodiment, which further includes WiFi module, and user terminal can pass through
WiFi module and multimode network access device communicate to connect, and then access external network.WiFi module can only include one
Or multiple 2.4G radio-cells, so that user is surfed the Internet by 2.4G frequency range.WiFi module can also only include one or more 5G
Radio-cell, so that user is surfed the Internet by 5G frequency range.WiFi module can also include the concurrent nothing of one or more 2.4G/5G double frequency
Line unit, so that user can be surfed the Internet with unrestricted choice by 2.4G frequency range or 5G frequency range.Wherein, 2.4G radio-cell can use
The chip of AR9381 model, the concurrent radio-cell of 2.4G/5G double frequency can use the chip of QCA9880 model.
In one embodiment, WiFi module is electrically connected by PCIe bus with processor chips.Wherein, WiFi module
Including each radio-cell can be connect by different PCIe buses with processor chips.For example, WiFi module includes one
2.4G radio-cell and a concurrent radio-cell of 2.4G/5G double frequency, then 2.4G radio-cell passes through PCIe0 route and processor
Chip connection, the concurrent radio-cell of 2.4G/5G double frequency are connect by PCIe1 route with processor chips.
In one embodiment, as shown in Figure 1, WiFi module further include: RF front-end module, signal collect unit with
And mutiple antennas.RF front-end module (Front End Module, FEM) is electrically connected with radio-cell corresponding in WiFi module
It connects, signal collects unit (Combiner) and is electrically connected with RF front-end module and mutiple antennas (Ant1, Ant2 ...).Fig. 1
In FEM be RF front-end module, Combiner be signal collect unit, Ant is antenna.
Each radio-cell in WiFi module is connected with corresponding RF front-end module, and independent RF front-end module can be with
More frequency bands are covered, the linearity of WiFi, i.e. 2.4G radio-cell and the radio-frequency front-end for being specific to 2.4G radio-cell are improved
Module connection, 5G radio-cell are connect with the RF front-end module for being specific to 5G radio-cell.Each RF front-end module with letter
Number collect unit connection, and issue wireless network signal by mutiple antennas, the signal of user terminal receiving antenna sending with
Receiving network data, antenna also receive the signal that user terminal is sent, and then realize wireless network interaction.If WiFi module is simultaneously
Radio-cell including 2.4G frequency range and 5G frequency range, then antenna user select 2.4G frequency range when receive and dispatch 2.4G signal, with
Family selects to receive and dispatch 5G signal when 5G.
In one embodiment, multimode network access device further include: one or more ethernet modules, ether
Net module is transmitted for cable network data.Each ethernet module includes the network transformer connecting with processor chips, often
A network transformer is connected with corresponding telecommunications outlet.Network transformer mainly have signal transmission, impedance matching, waveform reparation,
The effects of signal noise inhibition and high-voltage isolating.Telecommunications outlet is usually mounted on metope, in order to equipment such as computers
It is mobile.Particularly, the telecommunications outlet in the present embodiment uses RJ45 connector, and network transformer passes through Medium Dependent Interface and place
Manage the electrical connection of device chip.
In one embodiment, multimode network access device further include: LAN module, LAN module and processor core
Piece electrical connection.LAN (Local Area Network, local area network) refers to the meter being mutually unified into a certain region by multiple stage computers
Calculate unit.Particularly, the LAN module in the present embodiment uses wireless LAN module.By configuring LAN module, family end can be used
The file management realized in local area network by the LAN module of the multimode network access device, application software is held to share, printer
The functions such as shared, the schedule in working group, Email and facsimile service.
In one embodiment, multimode network access device further include: SLIC module, SLIC module include SLIC
Circuit, slic circuit are connect with processor chips and voip network respectively.SLIC(Subscriber Line Interface
Circuit), i.e., subscriber line interface circuit, effect are the connections realized between various user's lines and interchanger.Slic circuit will
One two wires transmission channel (leading to the access of subsets and the access from subsets) and one through overbalance
A four line transmission channel of non-counter-balanced (access i.e. between telephone office) is connected.Slic circuit has multiple functions, including
Encoding and decoding (Codec), battery supply feed, overvoltage protection, generation ring, sending signal, mixing, timing etc..
VoIP (Voiceover Internet Protocol) is exactly by analog signal digital, with data in brief
The form of package does real-time delivery on ip networks.VoIP can on ip networks cheap transmission voice, fax, video and
The business such as data, in unified messaging service, virtual telephony, virtual speech/fax mailbox, directory enquiry service, Internet calling
The heart, Internet call manager, telephone video meeting, e-commerce, fax storage forwarding and the storage of various information forwarding etc..
The multimode network access device realizes the digital-to-analogue conversion of voice signal by SLIC module and signal is sent to processor chips
The IPization for realizing voice signal, to realize IP phone function.
As shown in Figure 1, the slic circuit in the present embodiment uses Le9642 chip, and slic circuit passes through RJ11 interface
It is connect with voip network.Telephone line interface is RJ11 form, and the interface of slic circuit is set as two line telephone line interfaces,
In be used for voip network phone all the way, be all the way RJ11A, separately as shown in Figure 1, SLIC module is connected with two-way telephone line interface
It is all the way RJ11B, wherein RJ11B is connect with voip network.
It is understood that SLIC module further includes codec unit and mixed cell.Codec unit utilizes encoder
With decoder (CODEC) and filter, the modulus for completing voice signal is exchanged with digital-to-analogue, is handed over the number with digital switch
Switching network interface.Mixed cell (i.e. Hybrid unit) is used to carry out the 2/4 line conversion of user's line, to meet encoding and decoding and number
Exchange the requirement transmitted to four lines.Specifically, slic circuit is capable of providing the interface of ordinary telephone set, ordinary telephone set is supported
Call and signaling capability.The simulated voice of user A is transferred into the codec unit of slic circuit, and codec unit talks about simulation
Sound, which digitizes and is sent to processor chips, to be compressed, then is decompressed by the processor chips that IP network passes to user B
Contracting, the digital voice after decompression pass through codec unit again and are converted to simulated voice, are ultimately sent to the phone of user B.
In one embodiment, the multimode network access device further include: flash memory, flash memory with
Processor chips electrical connection.Flash memory is also known as flash memory, configuration information, operation for the multimode network access device
The long-term storage of the data such as system.Particularly, the flash memory in the present embodiment uses Nand-flash memory.Nand-
Flash memory is one kind of flash memory, internal to use non-linear macroelement mode, is solid-state large-capacity memory
Realization provides cheap effective solution scheme.
In one embodiment, multimode network access device further include: DDR3 memory, DDR3 memory and processor
Chip electrical connection.Wherein, DDR3 is a kind of calculator memory specification.DDR3 memory is matched for the multimode network access device
The interim storage of the data such as confidence breath, operating system.
In one embodiment, multimode network access device further include: RC filter circuit.RC filter circuit and place
The electrical connection of device chip is managed, full-duplex data is allowed to transmit.The signal being blocked by the feedback transmission of RC filter circuit, while
Receive the signal being allowed to.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, the change that can be readily occurred in
Change or replace, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with described
Subject to scope of protection of the claims.
Claims (10)
1. a kind of multimode network access device characterized by comprising processor chips and with processor chips electricity
DSL module, LTE module and the WAN module of connection；
At least one of the DSL module, the LTE module and described WAN module by own interfaces controllably with outer net
Communication connection；
The processor chips include accessing selecting unit and wire-speed detection unit and/or network quality detection unit, described
Data that selecting unit is detected according to the wire-speed detection unit and/or the network quality detection unit are accessed from the LTE
One and accessing user's network are selected in module, the DSL module and the WAN module.
2. multimode network access device as described in claim 1, which is characterized in that the DSL module includes: ADSL unit
And/or VDSL unit.
3. multimode network access device as described in claim 1, which is characterized in that the multimode network access device also wraps
PCIe slot is included, the LTE module is installed on the PCIe slot, is electrically connected by PCIe bus with the processor chips.
4. multimode network access device as claimed in claim 3, which is characterized in that the PCIe slot be also equipped with it is described
The SIM card slot of LTE module electrical connection.
5. multimode network access device as described in claim 1, which is characterized in that the equipment further includes WiFi module, institute
Stating WiFi module includes:
At least one 2.4G radio-cell, and/or
At least one 5G radio-cell, and/or
At least one concurrent radio-cell of 2.4G/5G double frequency.
6. multimode network access device as claimed in claim 5, which is characterized in that the WiFi module passes through PCIe bus
It is electrically connected with the processor chips.
7. such as multimode network access device described in claim 5 or 6, which is characterized in that the WiFi module further include: penetrate
Frequency front-end module, signal collect unit and mutiple antennas, the RF front-end module and corresponding nothing in the WiFi module
The electrical connection of line unit, the signal collect unit and are electrically connected with the RF front-end module and the multiple antenna.
8. multimode network access device as described in claim 1, which is characterized in that the multimode network access device also wraps
Include: LAN module, the LAN module are electrically connected with the processor chips.
9. multimode network access device as described in claim 1, which is characterized in that the multimode network access device also wraps
Include: SLIC module, the SLIC module includes slic circuit, the slic circuit respectively with the processor chips and VoIP
Network connection.
10. multimode network access device as described in claim 1, which is characterized in that the multimode network access device is also
It include: flash memory, the flash memory is electrically connected with the processor chips.
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| CN201821871343.5U CN208798245U (en) | 2018-11-13 | 2018-11-13 | A kind of multimode network access device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111447691A (en) * | 2020-03-30 | 2020-07-24 | 湖南新亚胜光电股份有限公司 | L ED intelligent display screen multimode wireless communication method |
| CN113133043A (en) * | 2019-12-30 | 2021-07-16 | 西安诺瓦星云科技股份有限公司 | Network connection selection method and device and embedded equipment |
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2018
- 2018-11-13 CN CN201821871343.5U patent/CN208798245U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133043A (en) * | 2019-12-30 | 2021-07-16 | 西安诺瓦星云科技股份有限公司 | Network connection selection method and device and embedded equipment |
| CN111447691A (en) * | 2020-03-30 | 2020-07-24 | 湖南新亚胜光电股份有限公司 | L ED intelligent display screen multimode wireless communication method |
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