CN107800785B - Narrowband internet of things module with self-adaptation function - Google Patents
Narrowband internet of things module with self-adaptation function Download PDFInfo
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- CN107800785B CN107800785B CN201710979802.5A CN201710979802A CN107800785B CN 107800785 B CN107800785 B CN 107800785B CN 201710979802 A CN201710979802 A CN 201710979802A CN 107800785 B CN107800785 B CN 107800785B
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- 239000003990 capacitor Substances 0.000 claims description 95
- 238000001514 detection method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000006855 networking Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 239000007795 chemical reaction product Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a narrow-band internet of things module with self-adaptation function and wide application range, which comprises: the antenna comprises a main control unit, a TX impedance matching unit, an RX impedance matching unit, an automatic gain control unit, a high gain amplifier, a logic control switch and an antenna matching unit; the main control unit is respectively connected with the high-gain amplifier and the logic control switch through the TX impedance matching unit, the main control unit is sequentially connected with the automatic gain control unit, the high-gain amplifier and the logic control switch, and the antenna matching unit is sequentially connected with the logic control switch, the RX impedance matching unit and the main control unit; when in short-distance transmission, the transmitting power of the main control unit is transmitted through the TX impedance matching unit, the logic control switch and the antenna matching unit, so that high-efficiency transmission is realized; during long-distance transmission, the transmitting power of the main control unit is processed and transmitted through the automatic gain control unit, the high gain amplifier, the logic control switch and the antenna matching unit, so that high-power transmission is realized.
Description
Technical Field
The invention relates to the field of narrowband Internet of things, in particular to a narrowband Internet of things module with a self-adaptive function and a wide application range.
Background
The cellular-based narrowband internet of things (Narrow Band Internet of Things, NB-IoT) becomes an important branch of the internet of everything. The NB-IoT is constructed in a cellular network and can be directly deployed in a GSM network, a UMTS network or an LTE network, so that the deployment cost is reduced and smooth upgrading is realized. Due to the broad market brought by the new technology, related end products are emerging in an outstanding way. NB-IoT technology has penetrated from birth into aspects of internet of things such as smart metering, property monitoring, agriculture, fleet and logistics management. Because of the large diversity of application scenarios and environmental conditions, unprecedented challenges are presented to NB-IoT products.
In the present stage, the NB-IOT equipment terminal is applied to aspects of social life such as smart cities, outdoor metering, logistics management and the like. But the requirements of the NB-IOT equipment terminals are different due to different application scenes. For example, in an intelligent logistics system in a city, the communication distance between terminals is not required to be far, but the electromagnetic interference resistance is required to be strong; the novel MTC (machine type communication) can be used for forest and agricultural metering, but is usually installed in remote areas covered by signals and even dead areas, the areas are difficult to be covered by the existing short-distance communication network and the mobile cellular network, and the requirement on the long-distance transmission capability of terminal equipment is high. Most NB-IOT equipment in the current market can only be developed and used aiming at specific application scenes, and the problems of long development period, narrow application range, poor portability, high product cost and the like are difficult to solve.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a narrow-band Internet of things module with a self-adaptive function and a wide application range.
The aim of the invention is realized by the following technical scheme:
a narrowband thing networking module that area self-adaptation function, range of application are wide includes: the antenna comprises a main control unit, a TX impedance matching unit, an RX impedance matching unit, an automatic gain control unit, a high gain amplifier, a logic control switch and an antenna matching unit;
the main control unit is respectively connected with the high-gain amplifier and the logic control switch through the TX impedance matching unit, the main control unit is sequentially connected with the automatic gain control unit, the high-gain amplifier and the logic control switch, and the antenna matching unit is sequentially connected with the logic control switch, the RX impedance matching unit and the main control unit;
when in short-distance transmission, the transmitting power of the main control unit is transmitted through the TX impedance matching unit, the logic control switch and the antenna matching unit, so that high-efficiency transmission is realized; during long-distance transmission, the transmitting power of the main control unit is processed and transmitted through the automatic gain control unit, the high gain amplifier, the logic control switch and the antenna matching unit, so that high-power transmission is realized.
As a further preferable scheme, the main control unit comprises a processor, a LAN, a signal detector and a comparator, wherein the LAN is connected with the processor sequentially through the signal detector and the comparator, the LAN is also connected with the RX impedance matching unit, and the processor is respectively connected with the TX impedance matching unit and the automatic gain control unit.
As a further preferable scheme, the antenna matching unit is also connected with an antenna.
As a further preferable scheme, the TX impedance matching unit includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a TX filter;
one end of the first resistor R1 is respectively connected with the high-gain amplifier and the first capacitor C1, the other end of the first resistor R1 is connected with the 1 pin of the TX filter, and the other end of the first capacitor C1 is grounded;
the 3 feet of the TX filter are respectively connected with the second capacitor C2 and one end of the second resistor R2, the other end of the second capacitor C2 is grounded, and the other end of the second resistor R2 is connected with the logic control unit.
As a further preferable scheme, the RX impedance matching unit includes a third capacitor C3, a fourth capacitor C4, a third resistor R3 and an RX filter;
and a pin 1 of the RX filter is connected with the logic control switch after passing through the third resistor R3, one end of the third resistor R3 is grounded after passing through the third capacitor C3, and the other end is grounded after passing through the fourth capacitor C4.
As a further preferable aspect, the high gain amplifier includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, and an amplifier U9;
one end of the fifth capacitor C5 is grounded, the other end is grounded after passing through the sixth capacitor C6 and the seventh capacitor C7, the sixth capacitor C6 is further connected with the 2 pin of the amplifier U9, the 9 pin of the amplifier U9 is respectively connected with one ends of the eighth capacitor C8 and the ninth capacitor C9, the other end of the eighth capacitor C8 is grounded, and the other end of the ninth capacitor C9 is connected with the TX impedance matching unit.
As a further preferable scheme, the logic control switch comprises a control switch U8, a tenth capacitor C10 and a first inductor L1;
and a pin 9 of the control switch U8 is grounded through the first inductor L1 and the tenth capacitor C10.
As a further preferable scheme, the automatic gain control unit includes a gain controller U2, a tenth resistor R10, an eleventh capacitor C11, a twelfth capacitor C12, and a second inductor L2;
the VIN pin of the gain controller U2 is connected to the main control unit, and the VIN pin is grounded through the twelfth capacitor C12, and is grounded through the tenth resistor R10 and the eleventh capacitor C11; the SW pin of the gain controller U2 is connected to the eleventh capacitor C11 through the second inductor.
Compared with the prior art, the invention has the following advantages:
1. the invention relates to a narrowband internet of things module with self-adaptive function and wide application range, the strength of a transmitting signal is determined by the strength and quality of the level actually received, and when the transmission is carried out in a short distance in a city, the transmitting power of a product is directly transmitted through a TX impedance matching unit and an antenna matching unit, so that the signal quality can be ensured, and the power supply loss can be effectively reduced; and when the antenna works outdoors or even in a remote mountain area, the transmitting end of the antenna needs to be processed and transmitted through a high-gain amplifier, so that the normal connection and communication between equipment and a base station can be ensured.
2. The invention ensures that the signals are transmitted to the back-end processor accurately without distortion and automatically detects and judges the received signals by arranging the high-gain amplifier, the logic control switch, the impedance matching unit, the signal detector, the comparator and the like in the main control unit, so as to confirm the selection of the logic control switch and the amplification factor. The module provided by the invention can be suitable for various application scenes, and the universality of the NB-IOT module is improved.
3. The narrowband internet of things module has the characteristics of wide application range, strong portability and low cost, and has good popularization prospect.
Drawings
FIG. 1 is a schematic block diagram of a narrowband Internet of things module with adaptive function and wide application range of the invention;
FIG. 2 is a schematic circuit diagram of the narrowband Internet of things module of FIG. 1;
fig. 3 is a schematic circuit diagram of the automatic gain control unit of fig. 1.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Examples
Referring to fig. 1-2, the present invention provides a narrowband internet of things module 10 with adaptive function and wide application range, comprising: the main control unit 100, the TX impedance matching unit 200, the RX impedance matching unit 300, the automatic gain control unit 400, the high gain amplifier 500, the logic control switch 600, and the antenna matching unit 700. It should be noted that, the TX impedance matching unit 200 is configured to eliminate the influence caused by electromagnetic interference to the greatest extent, so as to ensure high-quality transmission of signals; the RX impedance matching unit 300 is configured to filter electromagnetic interference, and has a fundamental wave suppression capability of 30dB and a harmonic suppression capability of more than 55 dB; the high gain amplifier 500 is used for amplifying transmission power, the highest amplification factor reaches more than 30dB, and hardware support is provided for long-distance transmission; the logic control switch 600 is used to make TX/RX selections.
The main control unit 100 is connected to the high gain amplifier 500 and the logic control switch 600 through the TX impedance matching unit 200, the main control unit 100 is connected to the automatic gain control unit 400, the high gain amplifier 500 and the logic control switch 600 in sequence, and the antenna matching unit 700 is connected to the logic control switch 600, the RX impedance matching unit 300 and the main control unit 100 in sequence.
The narrowband internet of things module further comprises a selection control switch U4, a fifth resistor R5 and a thirteenth capacitor C13; the fifth resistor R5 and the thirteenth capacitor C13 are connected in series to form a filtering unit, one end of the fifth resistor R5 is connected with the main control unit, the other end of the fifth resistor R5 is connected with the ANT pin of the selection control switch U4, and the RF1 pin of the selection control switch U4 is connected with the high-gain amplifier. Specifically, U4 is a TX selection control switch, and controls TX to directly perform network matching output according to a detection result of a signal at the back end of the chip, or to output through PA.
During short-distance transmission, the transmitting power of the master control unit 100 is transmitted through the TX impedance matching unit 200, the logic control switch 600 and the antenna matching unit 700, so that high-efficiency transmission is realized; in the long-distance transmission, the transmitting power of the main control unit 100 is processed and transmitted through the automatic gain control unit 400, the high gain amplifier 500, the logic control switch 600 and the antenna matching unit 700, so as to realize high-power transmission.
Further, the main control unit 100 includes a processor 110, a LAN120, a signal detector 130, and a comparator 140, where the LAN120 is connected to the processor 110 sequentially through the signal detector 130 and the comparator 140, the LAN120 is further connected to the RX impedance matching unit 300, and the processor 110 is connected to the TX impedance matching unit 200 and the automatic gain control unit 300, respectively.
It should be noted that the antenna matching unit is also connected with an antenna.
Further, the TX impedance matching unit 200 includes a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2, and a TX filter FILT1;
one end of the first resistor R1 is respectively connected with the high-gain amplifier and the first capacitor C1, the other end of the first resistor R1 is connected with the 1 pin of the TX filter FILT1, and the other end of the first capacitor C1 is grounded; the pin 1 of the TX filter is the IN/OUT pin.
The 3 pin of the TX filter FILT2 is connected to the second capacitor C2 and one end of the second resistor R2, the other end of the second capacitor C2 is grounded, and the other end of the second resistor R2 is connected to the logic control unit 600. The pin 1 of the TX filter FILT1 is the OUT/IN pin.
The RX impedance matching unit 300 includes a third capacitor C3, a fourth capacitor C4, a third resistor R3, and an RX filter FILT2;
the pin 1 of the RX filter FILT2 is connected to the logic control switch 600 after passing through the third resistor R3, one end of the third resistor R3 is grounded after passing through the third capacitor C3, and the other end is grounded after passing through the fourth capacitor C4. The IN pin of pin 1 of the RX filter FILT 2.
The high gain amplifier 500 includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, and an amplifier U9;
one end of the fifth capacitor C5 is grounded, the other end is grounded after passing through the sixth capacitor C6 and the seventh capacitor C7, the sixth capacitor C6 is further connected to the 2 pin of the amplifier U9, the 9 pin of the amplifier U9 is respectively connected to one ends of the eighth capacitor C8 and the ninth capacitor C9, the other end of the eighth capacitor C8 is grounded, and the other end of the ninth capacitor C9 is connected to the TX impedance matching unit 200.
The logic control switch 600 includes a control switch U8, a tenth capacitor C10, and a first inductor L1; and a pin 9 of the control switch U8 is grounded through the first inductor L1 and the tenth capacitor C10.
Referring to fig. 3, the automatic gain control unit 400 includes a gain controller U2, a tenth resistor R10, an eleventh capacitor C11, a twelfth capacitor C12, and a second inductor L2;
the VIN pin of the gain controller U2 is connected to the main control unit 100, and is grounded through the twelfth capacitor C12, and is grounded through the tenth resistor R10 and the eleventh capacitor C11; the SW pin of the gain controller U2 is connected to the eleventh capacitor C11 through the second inductor.
The high gain PA, logic control part and network matching part circuits are used as cores, the signal is matched through the network based on the level detector, the comparison unit and other functional modules at the back end, the accurate undistorted transmission to the back end processing unit is ensured, and the received signal is automatically detected and judged, so that the selection of the switching and amplifying times of the PA logic is confirmed. The product can be suitable for various application scenes of 3GPP, and becomes an NB-IOT module with extremely strong universality.
The above embodiments represent only a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. Take narrowband thing networking module of self-adaptation function, its characterized in that includes: the antenna comprises a main control unit, a TX impedance matching unit, an RX impedance matching unit, an automatic gain control unit, a high gain amplifier, a logic control switch and an antenna matching unit;
the main control unit is respectively connected with the high-gain amplifier and the logic control switch through the TX impedance matching unit, the main control unit is sequentially connected with the automatic gain control unit, the high-gain amplifier and the logic control switch, and the antenna matching unit is sequentially connected with the logic control switch, the RX impedance matching unit and the main control unit; the main control unit comprises a processor, a LAN, a signal detector and a comparator, wherein the LAN is connected with the processor through the signal detector and the comparator in sequence, the LAN is also connected with the RX impedance matching unit, and the processor is respectively connected with the TX impedance matching unit and the automatic gain control unit;
the narrowband internet of things module further comprises a selection control switch U4, a fifth resistor R5 and a thirteenth capacitor C13; the fifth resistor R5 and the thirteenth capacitor C13 are connected in series to form a filtering unit, one end of the fifth resistor R5 is connected with the main control unit, the other end of the fifth resistor R5 is connected with the ANT pin of the selection control switch U4, the RF1 pin of the selection control switch U4 is connected with the high gain amplifier, the selection control switch U4 is a selection control switch of TX, and the TX is controlled to directly perform network matching output according to a detection result of signals at the rear end of a chip or is output through a PA;
when in short-distance transmission, the transmitting power of the main control unit is transmitted through the TX impedance matching unit, the logic control switch and the antenna matching unit, so that high-efficiency transmission is realized; during long-distance transmission, the transmitting power of the main control unit is processed and transmitted through the automatic gain control unit, the high-gain amplifier, the logic control switch and the antenna matching unit, so that high-power transmission is realized, the logic control switch comprises a control switch U8, a tenth capacitor C10 and a first inductor L1, and a pin 9 of the control switch U8 is grounded after passing through the first inductor L1 and the tenth capacitor C10;
the pin 9 of the control switch U8 is grounded through the first inductor L1 and the tenth capacitor C10; the antenna matching unit is also connected with an antenna.
2. The narrowband internet of things module with self-adaptation function according to claim 1, wherein the TX impedance matching unit comprises a first resistor R1, a second resistor R2, a first capacitor C1, a second capacitor C2 and a TX filter;
one end of the first resistor R1 is respectively connected with the high-gain amplifier and the first capacitor C1, the other end of the first resistor R1 is connected with the 1 pin of the TX filter, and the other end of the first capacitor C1 is grounded;
the 3 feet of the TX filter are respectively connected with the second capacitor C2 and one end of the second resistor R2, the other end of the second capacitor C2 is grounded, and the other end of the second resistor R2 is connected with the logic control unit.
3. The narrowband internet of things module with self-adaptation function according to claim 1, wherein the RX impedance matching unit comprises a third capacitor C3, a fourth capacitor C4, a third resistor R3 and an RX filter;
and a pin 1 of the RX filter is connected with the logic control switch after passing through the third resistor R3, one end of the third resistor R3 is grounded after passing through the third capacitor C3, and the other end is grounded after passing through the fourth capacitor C4.
4. The narrowband internet of things module with self-adaptation function according to claim 1, wherein the high gain amplifier comprises a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9 and an amplifier U9;
one end of the fifth capacitor C5 is grounded, the other end is grounded after passing through the sixth capacitor C6 and the seventh capacitor C7, the sixth capacitor C6 is further connected with the 2 pin of the amplifier U9, the 9 pin of the amplifier U9 is respectively connected with one ends of the eighth capacitor C8 and the ninth capacitor C9, the other end of the eighth capacitor C8 is grounded, and the other end of the ninth capacitor C9 is connected with the TX impedance matching unit.
5. The narrowband internet of things module with self-adaptation function according to claim 1, wherein the automatic gain control unit comprises a gain controller U2, a tenth resistor R10, an eleventh capacitor C11, a twelfth capacitor C12, and a second inductor L2;
the VIN pin of the gain controller U2 is connected to the main control unit, and the VIN pin is grounded through the twelfth capacitor C12, and is grounded through the tenth resistor R10 and the eleventh capacitor C11; the SW pin of the gain controller U2 is connected to the eleventh capacitor C11 through the second inductor.
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