CN109495884A - A kind of the network switching circuit and switching method of multimode multi-frequency - Google Patents
A kind of the network switching circuit and switching method of multimode multi-frequency Download PDFInfo
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- CN109495884A CN109495884A CN201710815748.0A CN201710815748A CN109495884A CN 109495884 A CN109495884 A CN 109495884A CN 201710815748 A CN201710815748 A CN 201710815748A CN 109495884 A CN109495884 A CN 109495884A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
The present invention provides the network switching circuit and switching method of a kind of multimode multi-frequency, comprising: carries out information exchange with multimode multi-frequency modulation /demodulation module, and issues the micro treatment module of control signal；By micro treatment module control selections applicable network frequency range, and carry out the multimode multi-frequency modulation /demodulation module of wireless communication transmission；Several user identification modules of heterogeneous networks identification are provided.First user identification module accesses multimode multi-frequency modulation /demodulation module, and communication transfer is carried out in the network that the first user identification module is applicable in；When detecting that internet-of-things terminal can not be with background communication, second user identification module is switched and is accessed, communication transfer is carried out in the network that second user identification module is applicable in.The present invention controls different SIM card incoming communication chips by electronic switch, realizes internet-of-things terminal free switching between multiple networks, increases network utilization, while ensuring that the communication of internet-of-things terminal is normal by network backup.
Description
Technical field
The present invention relates to internet of things field, more particularly to the network switching circuit and switching method of a kind of multimode multi-frequency.
Background technique
Internet of Things (The Internet of Things, IoT) is exactly " the connected internet of object object ", utilizes localized network
Or the communication technologys such as internet are linked togather sensor, controller, machine, personnel and object etc. by new mode, and people is formed
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 to become all things on earth based on cellular narrowband Internet of Things (Narrow Band Internet of Thing, NB-IoT)
One important branch of networking network.It is implemented in cellular network 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 that its entire channel is not used, theoretically inexpensively with the calculating of its data transmission unit.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 communication mould
A variety of demands of formula and communications band, multimode multi-frequency communication chip are applied and are 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 customization, which supports all frequency ranges in the whole world of Cat-M1, Cat-NB1.
And MDM9206 is also integrated with GPS, lattice receive Loews, Beidou and Galileo global navigational satellite positioning service, not by appointing
It in the case where what additional chip or receiver, can be directly embedded into the chip, realize and filled with high pass 4G function
Divide integration.
Function one is integrated with Cortex A7 processor in MDM9206, is not necessarily to plug-in processor.
MDM9206 is not singly communication chip and a system controller.For example, MDM9206 can be regarded as one
Has 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 issues instruction, the operation such as close curtain, play music, open LED light to realize.
In addition, MDM9206 module also supports (SuSE) Linux OS and Thread operating system.Therefore, MDM9206 is not only
Possess the interface of processor, operating system and many hardware, also possesses the interface for being affiliated to sensor.
Function two, MDM9206 support phonetic function, have battery saving mode and eDRX (Enhanced in the art
Discontinuous Reception improves 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, 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 to realize the cellular connection support applied to low data rate Internet of Things in cost-effective manner,
Narrow band modem is set 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 chip is to combine Cat-M1 and Cat-NB1, and support simultaneously Cat-M1, Cat-NB1,
Tri- kinds of standards of E-GPRS support the Module manufacturers of these three standards that will issue successively in 2017 Nian Nianzhong.It can be achieved inexpensive, low
Power consumption, low bandwidth, the internet of things product and service extensively covered, help module manufacturer make Internet of Things under cost-effectiveness 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 replacement SIM card when network failure is not available or needs to carry out network switching,
The replacement of SIM card needs to open equipment, more troublesome, and for non-mobile device, replacement SIM card is even more time-consuming and laborious.
Therefore, how under the trend of present multimode multi-frequency communication mode, two or more network is arbitrarily switched,
Under the premise of not opening equipment replacement SIM card, while realizing that Multi net voting uses, it has also become those skilled in the art are urgently to be resolved
One of problem.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of network switchings of multimode multi-frequency
Circuit and switching method cannot use two or more net for solving multimode multi-frequency communication chip in the prior art simultaneously
The problem of network.
In order to achieve the above objects and other related objects, the present invention provides a kind of network switching circuit of multimode multi-frequency, institute
The network switching circuit for stating multimode multi-frequency includes 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 issues 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 applicable network frequency range of the control selections of micro treatment module 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 end of block, for providing the identification of access heterogeneous networks.
Preferably, the micro treatment module is connect 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 chip.
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 for being 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.
In order to achieve the above objects and other related objects, the present invention provides a kind of network switching based on above-mentioned multimode multi-frequency
The network object switching method of the switching method of circuit, the multimode multi-frequency includes at least:
First user identification module is accessed into multimode multi-frequency modulation /demodulation module, to first user identity identification
Module carries out identification certification, and after identification certification, the multimode multi-frequency modulation /demodulation module is known in first user identity
Communication transfer is carried out in the network that other module is applicable in；
It, will be described in the switching access of second user identification module when detecting that internet-of-things terminal can not be with background communication
Multimode multi-frequency modulation /demodulation module carries out identification certification to the second user identification module, after identification certification, institute
It states multimode multi-frequency modulation /demodulation module and carries out communication transfer in the network that the second user identification module is applicable in.
Preferably, the network object switching method of the multimode multi-frequency further includes in the second user identification module institute
Network is switched to the net that first user identification module is applicable in again after running setting time in applicable network
In network, and judge whether to network, be accessed if it can network；Otherwise not handover network.
Preferably, first user identification module is applied to the SIM based on cellular protenchyma intranet network
Card, the second user identification module are the SIM card applied to general grouped wireless network.
As described above, the network switching circuit and switching method of multimode multi-frequency of the invention, have the advantages that
The network switching circuit and switching method of multimode multi-frequency of the invention control different SIM cards by electronic switch and connect
Enter communication chip, realize internet-of-things terminal free switching between multiple networks such as GPRS network and NB-IoT network, improves net
Network utilization rate.
Detailed description of the invention
Fig. 1 is shown as a kind of embodiment of the network switching circuit of multimode multi-frequency of the invention.
Fig. 2 is shown as the another embodiment of the network switching circuit of multimode multi-frequency of the invention.
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 third electronic switches
141 first user identification modules
142 second user identification modules
143 third user identification modules
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Please refer to FIG. 1 to FIG. 2.It should be noted that diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, only shown in schema then with related component in the present invention rather than package count when according to actual implementation
Mesh, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its
Assembly layout kenel may also be increasingly complex.
Embodiment one
As shown in Figure 1, the present embodiment provides a kind of network switching circuit 1 of multimode multi-frequency, the network of the multimode multi-frequency
Switching circuit 1 includes:
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 issues the control of the multimode multi-frequency modulation /demodulation module 12 and each electronic switch
Signal processed.
Specifically, the reception of the sending port TX of the micro treatment module 11 and the multimode multi-frequency modulation /demodulation module 12
Port RX connection, the sending port of the receiving port RX of the micro treatment module 11 and the multimode multi-frequency modulation /demodulation module 12
TX connection, in the present embodiment, the micro treatment module 11 pass through serial line interface with the multimode multi-frequency modulation /demodulation module 12
It is bi-directionally connected, is instructed by AT (Attention) and realize two-way communication.The micro treatment module 11 is (including but unlimited by data
In sensor acquires data, each module controls data, each module status data) it is sent to the multimode multi-frequency modulation /demodulation module
12, the AT instruction that the micro treatment module 11 transmits is sent core net by the multimode multi-frequency modulation /demodulation module 12；
The multimode multi-frequency modulation /demodulation module 12 receives feedback signal, and feedback signal is sent to the micro treatment module 11, institute
It states micro treatment module 11 and judges whether data send success according to the feedback signal, and make further operating；The multimode is more
Frequency modulation demodulation module 12 also receives external control signal by wireless network, and exports to the micro treatment module, to pass through
The micro treatment module 11 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 is not limited to radio frequency unit, Power Management Unit, mould
It is quasi- digital baseband unit, be used for wireless telecommunications, any achievable wireless telecommunications and chip for being able to satisfy multimode multi-frequency demand is suitable
It is numerous to list herein for multimode multi-frequency modulation /demodulation module 12 of the invention.In the present embodiment, the multimode multi-frequency tune
Demodulation module 12 processed uses high pass MDM9206 chip.In the present embodiment, the multimode multi-frequency modulation /demodulation module 12 is provided with
Two antennas, match one by one with the user identification module in the present embodiment, and in actual use, a settable antenna is made
For public sending and receiving end, it is not limited to this embodiment.
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 one-to-one selective connection.
Specifically, in the present embodiment, the electronic switch is set as 2, respectively the first electronic switch 131 and second
Electronic switch 132, correspondingly, the user identification module are also set to 2, 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 is not limited to thyristor, transistor, field-effect
The switch of pipe, silicon-controlled or relay, any achievable electric signal control is suitable for the present invention, can be set as needed described
The type of 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 end 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 is separately connected the output end of the multimode multi-frequency modulation /demodulation module 12.
Specifically, the user identification module is 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 network with this.When first electronic switch 131 is beaten
When opening, first user identification module 141 is connect 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 the wireless telecommunications of NB network implementations；When second electronic switch 132 is opened
When, the second user identification module 142 is connect with the multimode multi-frequency modulation /demodulation module 12, realize 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 network, 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 set as 3, respectively the first user identification module 141,
Two user identification modules 142, third 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 third 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 of electronic switch is set as 3, respectively the first electronic switch 131,
Two electronic switches 132 and third electronic switch 133.There are three antennas for the setting of multimode multi-frequency modulation /demodulation module 12, respectively
For NB antenna, GPRS antenna and eMTC antenna.
As shown in Fig. 2, when first electronic switch 131 is opened, first user identification module 141 and institute
The connection of multimode multi-frequency modulation /demodulation module 12 is stated, realizes authentication, the multimode multi-frequency modulation /demodulation module 12 passes through NB net
Network realizes wireless telecommunications；When second electronic switch 132 open when, 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 net
Network realizes wireless telecommunications；When the third electronic switch 133 open when, the third 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 net
Network realizes wireless telecommunications；Same time only one electronic switch gating.The network switching circuit 1 of the multimode multi-frequency passes through electronics
The different SIM card incoming communication chip of switch control realizes internet-of-things terminal in GPRS network, NB-IoT network and eMTC network
Between free switching, be greatly improved network utilization.
Embodiment three
The present embodiment provides a kind of network object switching methods of multimode multi-frequency, with the multimode multi-frequency in embodiment one
It is specific as follows for the working principle of network switching circuit 1:
The micro treatment module 11 issues hardware reset signal, the multimode to the multimode multi-frequency modulation /demodulation module 12
The port that multifrequency modulation /demodulation module 12 is connect with each user identification module resets, and institute is connected in the micro treatment module 11
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 with the multimode multi-frequency modulation /demodulation module 12 by AT instruction, and the multimode is more
By the data in the micro treatment module 11, (including but not limited to sensor acquires data, each module to frequency modulation demodulation module 12
Control data, each module status data) backstage is sent to by NB-IoT wireless network, and pass through NB-IoT wireless network from rear
Platform collects feedback signal, to judge whether data send success；In addition, being believed by NB-IoT wireless network from control is collected from the background
Number, remotely to control internet-of-things terminal equipment.
When detecting that NB-IoT network failure, (NB-IoT unstable networks or the demand for having particular network) need to switch net
Network or can not be with being communicated from the background when, the micro treatment module 11 to the multimode multi-frequency modulation /demodulation module 12 issue hardware
Reset signal, the port that the multimode multi-frequency modulation /demodulation module 12 is connect with each user identification module resets, described
Second electronic switch 132 is connected in micro treatment module 11, 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 card.The micro treatment module 11 realizes two-way communication, institute with the multimode multi-frequency modulation /demodulation module 12 by AT instruction
Stating multimode multi-frequency modulation /demodulation module 12, (including but not limited to sensor acquires number by the data in the micro treatment module 11
Data, each module status data are controlled according to, each module) backstage is sent to by GPRS wireless network, and pass through GPRS wireless network
Network from feedback signal is collected from the background, to judge whether data send success；In addition, by GPRS wireless network from collecting control from the background
Signal processed, remotely to control internet-of-things terminal equipment.
(setting time can be set as needed, herein not after operation setting time in GPRS wireless network
Limit one by one), the micro treatment module 11 issues hardware reset signal to the multimode multi-frequency modulation /demodulation module 12, described more
The port that mould multifrequency modulation /demodulation module 12 is connect with each user identification module resets, and the micro treatment module 11 is connected
First electronic switch 131, by it is described be applied to the SIM card 141 based on cellular protenchyma intranet network access 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 network；Otherwise, GPRS network is still accessed.
In one embodiment of the invention, using being switched in another network after setting time, two networks are realized
Between arbitrary switch.
In another embodiment of the present invention, the GPRS network is the backup network of the NB-IoT network, usually
Internet-of-things terminal accesses NB-IoT network, when NB-IoT network breaks down, internet-of-things terminal is accessed GPRS network, with dimension
Normal communication is held, when switching back into NB-IoT network again after setting time, NB-IoT network does not have failure to be then always maintained at
In NB-IoT network.The optimum net of data is transmitted in internet-of-things terminal based on cellular protenchyma intranet network (NB-IoT)
Network environment has not been reached yet within Chinese territory due to being new industry based on cellular protenchyma intranet network (NB-IoT)
Be completely covered, and general grouped wireless network (GPRS) it is opposite be application comparative maturity network, within Chinese territory
Coverage rate is up to 92% or more, has the region of movable signal to be covered with substantially, therefore, when disposing internet-of-things terminal, can incite somebody to action
GPRS network applies GPRS network as backup network in the case where no NB-IoT network, once NB-IoT network is comprehensive
Internet-of-things terminal can be then switched in NB-IoT network by covering, realized optimal communication scheme, avoided replacing Internet of Things on a large scale
The operation of network termination or the SIM card in internet-of-things terminal communication module greatlys save human and material resources, while improving network utilization
Rate.
The number amount and type of changeable network can further limit according to actual needs, to realize between multiple networks
Free switching, be not limited to the present embodiment cited several ways.
The network object switching method of multimode multi-frequency of the invention controls different SIM card incoming communication cores by electronic switch
Piece, realization internet-of-things terminal free switching between multiple networks such as GPRS network and NB-IoT network, increases network utilization,
Ensure that the communication of internet-of-things terminal is normal by network backup simultaneously.
In conclusion the present invention provides the network switching circuit and switching method of a kind of multimode multi-frequency, comprising: more with multimode
Frequency modulation demodulation module carries out information exchange, and issue the control signal of multimode multi-frequency modulation /demodulation module and each electronic switch
Micro treatment module；According to the network frequency range that the control selections of micro treatment module are applicable in, and the multimode for carrying out wireless communication transmission is more
Frequency modulation demodulation module；The output end of multimode multi-frequency modulation /demodulation module is connected to by electronic switch, and it is different to provide access
Each user identification module of the identification of network.First user identification module accesses multimode multi-frequency modulatedemodulate mode transfer
Block, multimode multi-frequency modulation /demodulation module carry out communication transfer in the network that the first user identification module is applicable in；Work as inspection
Network that the first user identification module is applicable in is measured when can not be with background communication, second user identification module is cut
Changing-over enters multimode multi-frequency modulation /demodulation module, and communication transfer is carried out in the network that second user identification module is applicable in.
The network switching circuit and switching method of multimode multi-frequency of the invention control different SIM card incoming communication cores by electronic switch
Piece, realization internet-of-things terminal free switching between multiple networks such as GPRS network and NB-IoT network, increases network utilization,
The normal of internet-of-things terminal communication is ensured by network backup simultaneously.So the present invention effectively overcomes in the prior art kind
It plants disadvantage and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of network switching circuit 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, modulates with the multimode multi-frequency
Demodulation module carries out information exchange, and issues the control signal of the multimode multi-frequency modulation /demodulation module and 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 applicable network frequency range of the control selections of processing module, 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 end, 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 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 chip.
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 applied to the SIM card of 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.
8. the switching method of the network switching circuit based on the multimode multi-frequency as described in claim 1~7 any one, feature
It is, the network object switching method of the multimode multi-frequency includes at least:
First user identification module is accessed into multimode multi-frequency modulation /demodulation module, to first user identification module
Identification certification is carried out, after identification certification, the multimode multi-frequency modulation /demodulation module is in the first user identity identification mould
Communication transfer is carried out in the network that block is applicable in；
When detecting that internet-of-things terminal can not be with background communication, the switching of second user identification module is accessed into the multimode
Multifrequency modulation /demodulation module carries out identification certification to the second user identification module, described more after identification certification
Mould multifrequency modulation /demodulation module carries out communication transfer in the network that the second user identification module is applicable in.
9. the network object switching method of multimode multi-frequency according to claim 8, it is characterised in that: the net of the multimode multi-frequency
Road object switching method further includes after running setting time in the network that the second user identification module is applicable in by net
Network is switched to again in the network that first user identification module is applicable in, and judges whether to network, if can network
Then access；Otherwise not handover network.
10. the network object switching method of multimode multi-frequency according to claim 8, it is characterised in that: the first user body
Part identification module is applied to the SIM card based on cellular protenchyma intranet network, and the second user identification module is
SIM card applied to general grouped wireless network.
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