CN207427486U - A kind of network switching circuit of multimode multi-frequency - Google Patents
A kind of network switching circuit of multimode multi-frequency Download PDFInfo
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Abstract
The utility model provides a kind of network switching circuit of multimode multi-frequency, including：Information exchange is carried out with multimode multi-frequency modulation /demodulation module, and sends the micro treatment module of control signal；The network frequency range being applicable according to the control selections of the micro treatment module, and carry out the multimode multi-frequency modulation /demodulation module of wireless communication transmission；The output terminal of multimode multi-frequency modulation /demodulation module is connected to by corresponding electronic switch, and several user identification modules of heterogeneous networks identification are provided.The utility model controls different SIM card incoming communication chips by electronic switch, realizes internet-of-things terminal free switching between multiple networks, increases network utilization, while ensure that the communication of internet-of-things terminal is normal by network backup.
Description
Technical field
The utility model is related to Internet of Things field, more particularly to a kind of network switching circuit of multimode multi-frequency.
Background technology
Internet of Things (The Internet of Things, IoT) is exactly " internet that object object is connected ", utilizes localized network
Or the communication technologys such as internet are linked togather sensor, controller, machine, personnel and object etc. by new mode, form people
It is connected with object, object and object, realizes information-based, remote management and control and intelligentized network.Internet of Things is the extension of internet, it
Including resource all on internet and internet, all applications in compatible internet, but element all in Internet of Things is (all
Equipment, resource and communication etc.) be all personalized and privatization.Internet of Things industry has become the strategy of a new source of economic growth
New industry has good market efficiency.
It is mutual that all things on earth is become based on cellular narrowband Internet of Things (Narrow Band Internet of Thing, NB-IoT)
One important branch of networking network.Cellular network is implemented in based on cellular narrowband Internet of Things, only consumes the band of about 180KHz
Width can be deployed directly into GSM (Global System for Mobile Communication, global system for mobile communications) net
Network, UMTS ((Universal Mobile Telecommunications System, Universal Mobile Communication System) network or
LTE (Long Term Evolution, Long Term Evolution) network, to reduce lower deployment cost, realize smooth upgrade.
General grouped wireless network (General Packet Radio Service, GPRS) is gsm mobile telephone user
A kind of available mobile data services, belong to the data transmission technology in Generation Mobile Telecommunication System, are the continuities of GSM.GPRS and
It is in the past continuously different in the mode of channel transmission, it is to be transmitted with package (Packet) formula, therefore the expense that user is born
It is to be calculated with its data transmission unit, not using its entire channel, theoretically inexpensively.The transmission rate of GPRS can be promoted
To 56 even 114Kbps.
With the continuous development of the communications industry, communication protocol, communications band are more and more, based on communication field to the mould that communicates
A variety of demands of formula and communications band, multimode multi-frequency communication chip are applied and given birth to, in March, 2017, and high pass is proposed as Cat-M1
With the chip MDM9206 of the multimode multi-frequency of Cat-NB1 customizations, which supports all frequency ranges in the whole world of Cat-M1, Cat-NB1.
And MDM9206 is also integrated with GPS, lattice receive Loews, the Big Dipper and Galileo global navigational satellite positioning service, not by appointing
It in the case of what additional chip or receiver, can be directly embedded into the chip, realize and filled with high pass 4G functions
Divide and integrate.
Function one is integrated with Cortex A7 processors in MDM9206, without plug-in processor.
MDM9206 is not singly communication chip and a system controller.For example, MDM9206 can be regarded as one
Possesses the small-sized SoC (System on Chip, system level chip) of computing capability, in family's application scenarios, user can lead to
It crosses MDM9206 and sends instruction, the operations such as curtain, broadcasting music, opening LED light are closed to realize.
In addition, MDM9206 modules also support (SuSE) Linux OS and Thread operating systems.Therefore, MDM9206 is not only
Possess the interface of processor, operating system and many hardware, also possess the interface for being affiliated to sensor.
Function two, MDM9206 support phonetic function, possess battery saving mode and eDRX (Enhanced in the art
Discontinuous Reception improve discontinuous reception modes).
Technology of the high pass on VoLTE, 4G voice and battery saving mode is also all industry-leading, these technologies are all from
LTE evolution, and carried out corresponding adjustment.
For the previous period, high pass and Ericsson of network equipment supplier and North America operator AT＆T are carried out based on Cat-M1
The test of voice, a slight module carry out the test of voice inside table, and sound effect has very high quality.
Function three, by MDM9206, the function of the sustainable extension LTE of high pass.
MDM9206 is intended in cost-effective manner, realize the cellular connection support to the application of low data rate Internet of Things,
Narrow band modem is enable more efficiently to support these applications.Meanwhile these application covering Internet of Things field, it presents complete
New business opportunity.Wherein, including the wisdom energy and metering, building security protection, infrastructure, Industry Control and automation, retail sales point,
Asset tracking, medical treatment, illumination and aftermarket telematics.
The advantage of MDM9206 chips is to combine Cat-M1 and Cat-NB1, and support simultaneously Cat-M1, Cat-NB1,
Tri- kinds of standards of E-GPRS, supporting the Module manufacturers of these three standards will successively issue in year in 2017.It can be achieved inexpensive, low
Power consumption, low bandwidth, the Internet of product extensively covered and service, help module manufacturer make Internet of Things under cost benefit maximization
Product.
Multimode multi-frequency communication chip accesses the network of needs by connecting different SIM cards, realizes communication transfer.But
One SIM card only supports a kind of network, in the case where being changed without SIM, multimode multi-frequency communication chip only can in the network into
The transmission of row signal just has to replace SIM card when network failure can not use or need to carry out network switching,
The replacement of SIM card needs to open equipment, cumbersome, and for non-mobile device, it is even more time-consuming and laborious to replace SIM card.
Therefore, how under the trend of present multimode multi-frequency communication mode, two or more network of any switching laws,
On the premise of not opening equipment replacement SIM card, while realize that Multi net voting uses, it has also become those skilled in the art are urgently to be resolved hurrily
One of problem.
Utility model content
In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide a kind of networks of multimode multi-frequency
Switching circuit, cannot asking using two or more network simultaneously for solving multimode multi-frequency communication chip in the prior art
Topic.
In order to achieve the above objects and other related objects, the utility model provides a kind of network switching electricity of multimode multi-frequency
Road, the network switching circuit of the multimode multi-frequency include at least：
Micro treatment module, multimode multi-frequency modulation /demodulation module, several electronic switches and with each electronic switch correspond connect
The user identification module connect；
The micro treatment module connects the multimode multi-frequency modulation /demodulation module and each electronic switch, with the multimode multi-frequency
Modulation /demodulation module carries out information exchange, and sends the control letter of the multimode multi-frequency modulation /demodulation module and each electronic switch
Number；
The multimode multi-frequency modulation /demodulation module connects the micro treatment module and each user identification module, according to institute
The network frequency range that the control selections of micro treatment module are applicable in is stated, and carries out wireless communication transmission；
Each user identification module is connected to the multimode multi-frequency modulatedemodulate mode transfer by corresponding electronic switch
The output terminal of block, for providing the identification of access heterogeneous networks.
Preferably, the micro treatment module is connected with the multimode multi-frequency modulation /demodulation module by serial ports, to realize letter
Breath interaction.
Preferably, the multimode multi-frequency modulation /demodulation module include radio frequency unit, Power Management Unit, simulation number base
Tape cell.
It is highly preferred that the multimode multi-frequency modulation /demodulation module is high pass MDM9206 chips.
Preferably, the network switching circuit of the multimode multi-frequency further comprise the first electronic switch, the second electronic switch,
The first user identification module and second user to connect one to one with first electronic switch and the second electronic switch
Identification module.
It is highly preferred that the user identification module includes the SIM card applied to general grouped wireless network, is applied to
The SIM card of SIM card or enhancing machine type communication network based on cellular protenchyma intranet network.
It is highly preferred that each electronic switch is thyristor, transistor, field-effect tube, silicon-controlled or relay.
As described above, the network switching circuit of the multimode multi-frequency of the utility model, has the advantages that：
The network switching circuit of the multimode multi-frequency of the utility model controls different SIM card incoming communications by electronic switch
Chip realizes internet-of-things terminal free switching between multiple networks such as GPRS network and NB-IoT networks, improves network and utilizes
Rate.
Description of the drawings
Fig. 1 is shown as a kind of structure diagram of the network switching circuit of the multimode multi-frequency of the utility model.
Fig. 2 is shown as another structure diagram of the network switching circuit of the multimode multi-frequency of the utility model.
Component label instructions
The network switching circuit of 1 multimode multi-frequency
11 micro treatment modules
12 multimode multi-frequency modulation /demodulation modules
131 first electronic switches
132 second electronic switches
133 the 3rd electronic switches
141 first user identification modules
142 second user identification modules
143 the 3rd user identification modules
Specific embodiment
Illustrate the embodiment of the utility model below by way of specific specific example, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the utility model easily.The utility model can also be by addition
Different specific embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints with answering
With carrying out various modifications or alterations under the spirit without departing from the utility model.
Please refer to Fig.1~Fig. 2.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of utility model, the then only display component related with the utility model rather than during according to actual implementation in schema
Component count, shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during actual implementation
Become, and its assembly layout kenel may also be increasingly complex.
Embodiment one
As shown in Figure 1, the utility model provides a kind of network switching circuit 1 of multimode multi-frequency, the net of the multimode multi-frequency
Network switching circuit 1 includes at least：
Micro treatment module 11, multimode multi-frequency modulation /demodulation module 12, several electronic switches and a pair of with each electronic switch one
The user identification module that should be connected.
As shown in Figure 1, the micro treatment module 11 connects the multimode multi-frequency modulation /demodulation module 12, it is more with the multimode
Frequency modulation demodulation module 12 carries out information exchange, and sends the control of the multimode multi-frequency modulation /demodulation module 12 and each electronic switch
Signal processed.
Specifically, the sending port TX of the micro treatment module 11 and the reception of the multimode multi-frequency modulation /demodulation module 12
Port RX connections, the receiving port RX of the micro treatment module 11 and the transmitting terminal of the multimode multi-frequency modulation /demodulation module 12
Mouth TX connections, in the present embodiment, the micro treatment module 11 passes through serial interface with the multimode multi-frequency modulation /demodulation module 12
Mouth is bi-directionally connected, and is passed through AT (Attention) and is instructed realization two-way communication.The micro treatment module 11 by data (including but not
It is limited to sensor gathered data, each module control data, each module status data) it is sent to the multimode multi-frequency modulatedemodulate mode transfer
The AT instructions that the micro treatment module 11 transmits are sent to core by block 12, the multimode multi-frequency modulation /demodulation module 12
Net；The multimode multi-frequency modulation /demodulation module 12 receives feedback signal, and feedback signal is sent to the micro treatment module 11,
The micro treatment module 11 judges whether data send success according to the feedback signal, and makees further operating；The multimode
Multifrequency modulation /demodulation module 12 also receives external control signal by wireless network, and exports to the micro treatment module, with logical
It crosses the micro treatment module 11 and controls internet-of-things terminal equipment.
Specifically, the micro treatment module 11 is also connected with the reset terminal of the multimode multi-frequency modulation /demodulation module, with control
The multimode multi-frequency modulation /demodulation module resets.
Specifically, the micro treatment module 11 is also connected with the control terminal of each electronic switch.
As shown in Figure 1, the multimode multi-frequency modulation /demodulation module 12 connects the micro treatment module 11 and each user identity
Identification module according to the network frequency range that the control selections of the micro treatment module 11 are applicable in, and carries out wireless communication transmission.
Specifically, the multimode multi-frequency modulation /demodulation module 12 is bi-directionally connected with the micro treatment module 11 realizes that information passes
It is defeated, and the data in the micro treatment module 11 are wirelessly transmitted to core net, by the wireless signal transmission in core net to institute
State micro treatment module 11.The multimode multi-frequency modulation /demodulation module 12 includes but not limited to radio frequency unit, Power Management Unit, mould
Intend digital baseband unit, for wireless telecommunications, arbitrary achievable wireless telecommunications and can meet multimode multi-frequency demand chip it is suitable
It is numerous to list herein for the multimode multi-frequency modulation /demodulation module 12 of the utility model.In the present embodiment, the multimode is more
Frequency modulation demodulation module 12 uses high pass MDM9206 chips.In the present embodiment, the multimode multi-frequency modulation /demodulation module 12 is set
It puts there are two antenna, is matched one by one with the user identification module in the present embodiment, in actual use, a day can be set
Line is not limited to this embodiment as public sending and receiving end.
As shown in Figure 1, each electronic switch is connected to the multimode multi-frequency modulation /demodulation module 12 and each user identity identification
Between module, due to realizing man-to-man selectivity connection.
Specifically, in the present embodiment, the electronic switch is set as 2, is respectively the first electronic switch 131 and second
Electronic switch 132, correspondingly, the user identification module are also set to 2, are respectively the first user identity identification mould
Block 141 and second user identification module 142.One end of first electronic switch 131 connects the multimode multi-frequency modulation
The port SI/O of demodulation module 12, the other end connect the port I/O of first user identification module 141；Described second
One end of electronic switch 132 connects the port SI/O of the multimode multi-frequency modulation /demodulation module 12, other end connection described second
The port I/O of user identification module 142.The type of each electronic switch includes but not limited to thyristor, transistor, field-effect
Pipe, silicon-controlled or relay, the switch of arbitrary achievable electric signal control are suitable for the utility model, can be set as needed
The type of the electronic switch, is not limited to this embodiment.
As shown in Figure 1, each user identification module is connected to the multimode multi-frequency by corresponding electronic switch
The output terminal of modulation /demodulation module 12, for providing the identification of access heterogeneous networks.
Specifically, in the present embodiment, the power end VDD of the user identification module, ground terminal VSS, clock end CLK
And reset terminal RST connects the output terminal of the multimode multi-frequency modulation /demodulation module 12 respectively.
Specifically, the user identification module be SIM (Subscriber Identity Module) card, including but
It is not limited to the SIM card applied to general grouped wireless network (General Packet Radio Service, GPRS), is applied to
Based on the SIM card of cellular protenchyma intranet network (Narrow Band Internet of Thing, NB-IoT), not with this
Embodiment is limited.In the present embodiment, first user identification module 141 is applied to based on cellular narrowband Internet of Things
The SIM card of net network (NB-IoT), the second user identification module 142 are applied to general grouped wireless network
(GPRS) SIM card realizes the mutual switching between GPRS network and NB networks with this.When first electronic switch 131 is beaten
When opening, first user identification module 141 is connected with the multimode multi-frequency modulation /demodulation module 12, realizes that identity is recognized
Card, the multimode multi-frequency modulation /demodulation module 12 pass through NB real-time performance wireless telecommunications；When second electronic switch 132 is opened
When, the second user identification module 142 is connected with the multimode multi-frequency modulation /demodulation module 12, realizes authentication,
The multimode multi-frequency modulation /demodulation module 12 realizes wireless telecommunications, same time only one electronic switch choosing by GPRS network
It is logical.
The network switching circuit 1 of the multimode multi-frequency controls different SIM card incoming communication chips by electronic switch, real
Existing internet-of-things terminal free switching between GPRS network and NB-IoT networks, substantially increases network utilization.
Embodiment two
As shown in Fig. 2, the present embodiment provides a kind of network switching circuit 1 of multimode multi-frequency, it is different from embodiment one it
It is in the user identification module in the present embodiment is arranged to 3, is respectively the first user identification module 141, the
Two user identification modules 142, the 3rd user identification module 143.
Specifically, in the present embodiment, first user identification module 141 is applied to based on cellular narrowband
The SIM card of Internet of Things network (NB-IoT), the second user identification module 142 are applied to general grouped wireless network
(GPRS) SIM card, the 3rd user identification module 143 are applied to enhancing machine type communication network (Enhanced
Machine Type Communication, eMTC) SIM card.The quantity and type of user identification module can be according to need
It sets, is not limited to this embodiment.
Correspondingly, in the present embodiment, the quantity set of electronic switch is 3, is respectively the first electronic switch 131, the
Two electronic switches 132 and the 3rd electronic switch 133.There are three antenna, difference for the setting of multimode multi-frequency modulation /demodulation module 12
For NB antennas, GPRS antenna and eMTC antennas.
As shown in Fig. 2, when first electronic switch 131 is opened, first user identification module 141 and institute
It states multimode multi-frequency modulation /demodulation module 12 to connect, realizes authentication, the multimode multi-frequency modulation /demodulation module 12 passes through NB nets
Network realizes wireless telecommunications；When second electronic switch 132 is opened, the second user identification module 142 with it is described
Multimode multi-frequency modulation /demodulation module 12 connects, and realizes authentication, and the multimode multi-frequency modulation /demodulation module 12 passes through GPRS nets
Network realizes wireless telecommunications；When the 3rd electronic switch 133 is opened, the 3rd user identification module 143 with it is described
Multimode multi-frequency modulation /demodulation module 12 connects, and realizes authentication, and the multimode multi-frequency modulation /demodulation module 12 passes through eMTC nets
Network realizes wireless telecommunications；Same time only one electronic switch gating.The network switching circuit 1 of the multimode multi-frequency passes through electronics
Switch controls different SIM card incoming communication chips, realizes internet-of-things terminal in GPRS network, NB-IoT networks and eMTC nets
Free switching between network, is greatly improved network utilization.
Embodiment three
The present embodiment provides a kind of network object switching method of multimode multi-frequency, with the multimode multi-frequency in embodiment one
It is specific as follows exemplified by the operation principle of network switching circuit 1：
The micro treatment module 11 sends hardware reset signal, the multimode to the multimode multi-frequency modulation /demodulation module 12
The port that multifrequency modulation /demodulation module 12 is connected with each user identification module resets, and the micro treatment module 11 turns on institute
The first electronic switch 131 is stated, first user identification module 141 is accessed into the multimode multi-frequency modulation /demodulation module
12, the multimode multi-frequency modulation /demodulation module 12 completes identification by first user identification module 141, at this
In embodiment, first user identification module 141 is applied to the SIM card based on cellular protenchyma intranet network.
The micro treatment module 11 realizes two-way communication by AT instructions with the multimode multi-frequency modulation /demodulation module 12, and the multimode is more
Data in the micro treatment module 11 (are included but not limited to sensor gathered data, each module by frequency modulation demodulation module 12
Control data, each module status data) backstage is sent to by NB-IoT wireless networks, and pass through NB-IoT wireless networks from rear
Platform collects feedback signal, to judge whether data send success；In addition, believed by NB-IoT wireless networks from control is collected from the background
Number, with remote control internet-of-things terminal equipment.
When detect NB-IoT network failures, (NB-IoT unstable networks or the demand for having particular network) need switch net
Network or can not be with being communicated from the background when, the micro treatment module 11 sends hardware to the multimode multi-frequency modulation /demodulation module 12
Reset signal, the port that the multimode multi-frequency modulation /demodulation module 12 is connected with each user identification module resets, described
Micro treatment module 11 turns on second electronic switch 132, and the second user identification module 142 is accessed the multimode
Multifrequency modulation /demodulation module 12, the multimode multi-frequency modulation /demodulation module 12 pass through the second user identification module 142
Identification is completed, in the present embodiment, the second user identification module 142 is applied to general grouped wireless network
SIM cards.The micro treatment module 11 realizes two-way communication by AT instructions with the multimode multi-frequency modulation /demodulation module 12,
Data in the micro treatment module 11 (are included but not limited to sensor acquisition number by the multimode multi-frequency modulation /demodulation module 12
According to, each module control data, each module status data) backstage is sent to by GPRS wireless networks, and pass through GPRS wireless networks
Network from feedback signal is collected from the background, to judge whether data send success；In addition, by GPRS wireless networks from collecting control from the background
Signal processed, with remote control internet-of-things terminal equipment.
(setting time can be set as needed, herein not after operation setting time in GPRS wireless networks
Limit one by one), the micro treatment module 11 sends hardware reset signal to the multimode multi-frequency modulation /demodulation module 12, described more
The port that mould multifrequency modulation /demodulation module 12 is connected with each user identification module resets, and the micro treatment module 11 turns on
First electronic switch 131, by it is described access applied to the SIM card 141 based on cellular protenchyma intranet network it is described more
Mould multifrequency modulation /demodulation module 12, and complete identification.The micro treatment module 11 judges whether to network, if it can network
Access NB-IoT networks；Otherwise, GPRS network is still accessed.
In one embodiment of the utility model, using being switched to after setting time in another network, two are realized
Any switching laws between network.
In another embodiment of the utility model, the GPRS network is the backup network of the NB-IoT networks,
Usual internet-of-things terminal access NB-IoT networks, when NB-IoT networks break down, GPRS network is accessed by internet-of-things terminal,
To maintain normal communication, when switching back into NB-IoT networks again after setting time, NB-IoT networks do not have failure then always
It is maintained in NB-IoT networks.Data optimum is transmitted in internet-of-things terminal based on cellular protenchyma intranet network (NB-IoT)
Network environment, be new industry due to being based on cellular protenchyma intranet network (NB-IoT), reach middle border not yet
Interior is completely covered, and it is a network using comparative maturity that general grouped wireless network (GPRS) is opposite, in middle border
Interior coverage rate is up to more than 92%, and the region for having movable signal is covered with substantially, therefore, when disposing internet-of-things terminal,
Can using GPRS network as backup network, using GPRS network in the case of no NB-IoT networks, once NB-IoT networks
Internet-of-things terminal can be then switched in NB-IoT networks by covering comprehensively, realized optimal communication scheme, avoided replacing on a large scale
The operation of internet-of-things terminal or the SIM card in internet-of-things terminal communication module greatlys save human and material resources, while improves network
Utilization rate.
The number amount and type of changeable network can do further restriction according to actual needs, to realize between multiple networks
Free switching, be not limited to the several ways cited by the present embodiment.
The network object switching method of the multimode multi-frequency of the utility model controls different SIM card accesses logical by electronic switch
Chip is interrogated, realizes internet-of-things terminal free switching between multiple networks such as GPRS network and NB-IoT networks, improves network profit
With rate, while ensure that the communication of internet-of-things terminal is normal by network backup.
In conclusion the utility model provides a kind of network switching circuit of multimode multi-frequency, including：It is modulated with multimode multi-frequency
Demodulation module carries out information exchange, and sends the microprocessor of multimode multi-frequency modulation /demodulation module and the control signal of each electronic switch
Module；The network frequency range being applicable according to the control selections of micro treatment module, and carry out the multimode multi-frequency modulation of wireless communication transmission
Demodulation module；The output terminal of multimode multi-frequency modulation /demodulation module is connected to by electronic switch, and access heterogeneous networks are provided
Each user identification module of identification.The network switching circuit of the multimode multi-frequency of the utility model passes through electronic switch control
Different SIM card incoming communication chips is made, realizes internet-of-things terminal between multiple networks such as GPRS network and NB-IoT networks
Free switching is increased network utilization, while ensures that internet-of-things terminal communicates normal by network backup.So this practicality
It is new effectively to overcome various shortcoming of the prior art and have high industrial utilization.
The above embodiments are only illustrative of the principle and efficacy of the utility model, new not for this practicality is limited
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by the claim of the utility model.
Claims (7)
1. the network switching circuit of a kind of multimode multi-frequency, which is characterized in that the network switching circuit of the multimode multi-frequency at least wraps
It includes：
It micro treatment module, multimode multi-frequency modulation /demodulation module, several electronic switches and connects one to one with each electronic switch
User identification module；
The micro treatment module connects the multimode multi-frequency modulation /demodulation module and each electronic switch, is modulated with the multimode multi-frequency
Demodulation module carries out information exchange, and sends the multimode multi-frequency modulation /demodulation module and the control signal of each electronic switch；
The multimode multi-frequency modulation /demodulation module connects the micro treatment module and each user identification module, according to described micro-
The network frequency range that the control selections of processing module are applicable in, and carry out wireless communication transmission；
Each user identification module is connected to the multimode multi-frequency modulation /demodulation module by corresponding electronic switch
Output terminal, for providing the identification of access heterogeneous networks.
2. the network switching circuit of multimode multi-frequency according to claim 1, it is characterised in that：The micro treatment module and institute
It states multimode multi-frequency modulation /demodulation module to connect by serial ports, to realize information exchange.
3. the network switching circuit of multimode multi-frequency according to claim 1, it is characterised in that：The multimode multi-frequency modulatedemodulate
Mode transfer block include radio frequency unit, Power Management Unit, simulation digital baseband unit.
4. the network switching circuit of the multimode multi-frequency according to claim 1 or 3, it is characterised in that：The multimode multi-frequency tune
Demodulation module processed is high pass MDM9206 chips.
5. the network switching circuit of multimode multi-frequency according to claim 1, it is characterised in that：The network of the multimode multi-frequency
Switching circuit further comprises the first electronic switch, the second electronic switch and first electronic switch and the second electronic switch
The first user identification module and second user identification module to connect one to one.
6. the network switching circuit of multimode multi-frequency according to claim 1 or 5, it is characterised in that：The user identity is known
Other module includes the SIM card applied to general grouped wireless network, applied to the SIM card based on cellular protenchyma intranet network
Or the SIM card of enhancing machine type communication network.
7. the network switching circuit of multimode multi-frequency according to claim 1 or 5, it is characterised in that：Each electronic switch is crystalline substance
Brake tube, transistor, field-effect tube, silicon-controlled or relay.
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| CN108880878A (en) * | 2018-06-11 | 2018-11-23 | 江苏航天大为科技股份有限公司 | NB-IOT network switching device |
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| CN109495884A (en) * | 2017-09-12 | 2019-03-19 | 上海产业技术研究院 | A kind of the network switching circuit and switching method of multimode multi-frequency |
| CN109495941A (en) * | 2018-11-15 | 2019-03-19 | 广东电网有限责任公司 | A kind of switching system of 4G-LTE wireless network signal |
| CN111031530A (en) * | 2019-11-13 | 2020-04-17 | 农眼区块链科技(广州)有限公司 | Agricultural Internet of things communication system and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495884A (en) * | 2017-09-12 | 2019-03-19 | 上海产业技术研究院 | A kind of the network switching circuit and switching method of multimode multi-frequency |
| CN108880878A (en) * | 2018-06-11 | 2018-11-23 | 江苏航天大为科技股份有限公司 | NB-IOT network switching device |
| CN108966300A (en) * | 2018-08-01 | 2018-12-07 | 中国联合网络通信集团有限公司 | A kind of bimodulus mould group method for switching network, apparatus and system |
| CN108966300B (en) * | 2018-08-01 | 2021-01-29 | 中国联合网络通信集团有限公司 | Network switching method, device and system for dual-mode module |
| CN109495941A (en) * | 2018-11-15 | 2019-03-19 | 广东电网有限责任公司 | A kind of switching system of 4G-LTE wireless network signal |
| CN111031530A (en) * | 2019-11-13 | 2020-04-17 | 农眼区块链科技(广州)有限公司 | Agricultural Internet of things communication system and control method thereof |
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