CN113473680B - Discrete access method and structure of NB-IoT intelligent street lamp terminal - Google Patents
Discrete access method and structure of NB-IoT intelligent street lamp terminal Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/16—Controlling the light source by timing means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a discrete access method and a discrete access structure of an NB-IoT intelligent street lamp terminal, wherein the discrete access method is connected with a RESET interface of an NB-IoT communication module through a control line, and a delay power-on function of the NB-IoT communication module is realized through program control. Or the direct current power supply distributor is connected in series between the power supply circuit and the NB-IOT communication module, and then the microcontroller randomly delays to control the direct current power supply distributor to supply power to the NB-IOT communication chip without the RESET pin, so that the power-on time of each street lamp terminal is staggered to realize discrete access to the network. The invention can solve the problems of insufficient instantaneous network resources and greatly improved uplink interference level caused by simultaneous network access of a large number of terminals when the NB-IOT intelligent street lamp is powered on, and improves the communication success rate of the NB-IOT network and the success rate of reporting data by the terminals.
Description
Technical Field
The invention relates to the technical field of NB-IOT intelligent street lamps, in particular to a discrete access method and a discrete access structure of an NB-IoT intelligent street lamp terminal.
Background
As shown in FIG. 1, the conventional NB-IOT intelligent street lamp system is composed of a control center, a centralized controller and street lamp terminals, wherein the street lamp terminals are connected with a network by adopting an NB-IOT communication module and transmit back data.
The existing system adopts NB-IoT (narrowband internet of things ) street lamp terminals to be directly connected with a power supply module through commercial power, and the power supply module respectively supplies power to a lighting circuit module, an MCU (micro control unit) and an NB-IoT communication module.
As shown in fig. 2, after the mains is powered on, the MCU and NB-IoT communication modules are powered on simultaneously and start working. When the street lamp needs to be started, the control center sends a power-on instruction uniformly, each centralized controller immediately powers on after receiving the power-on instruction, and all NB-IOT street lamp terminals are powered on and connected to a network simultaneously.
The disadvantages of the prior art are: after the centralized controller is electrified, all street lamp terminals are electrified at the same time, and a large number of terminals are simultaneously connected to the network. At this time, the number of local area access terminals is too large, and the capacity of the PRACH channel of the base station is insufficient, which results in failure of access network. Meanwhile, a large number of terminals are simultaneously connected with the network, and failed terminals repeatedly connected with the network, so that uplink interference of the network is obviously increased, and a large number of terminals fall into vicious circle of access failure, uplink transmitting power lifting and uplink interference increase. Resulting in failure of a large number of terminals to access the network, or loss of reporting of data, and degradation of overall network performance.
Disclosure of Invention
The invention aims to provide a discrete access method and a discrete access structure of an NB-IoT intelligent street lamp terminal.
The technical scheme adopted by the invention is as follows:
the discrete access structure of the NB-IoT intelligent street lamp terminal comprises a power circuit, a lighting circuit, a microcontroller, an NB-IoT communication chip and a transmitting antenna, wherein mains supply is connected to the power circuit, the power circuit is respectively connected with the lighting circuit, the NB-IoT communication chip and a power pin of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IoT communication chip through data wires, the NB-IoT communication chip is connected with the transmitting antenna, a control pin of the microcontroller is connected with a RESET pin of the NB-IoT communication chip, a delay program is arranged in the microcontroller, each street lamp delay program is randomly delayed within the longest time range of time delay, the microcontroller outputs a high level to the RESET pin when the delay program is finished in a countdown mode, and the power pin and the RESET pin of the NB-IoT communication chip are started when the power pin and the RESET pin are simultaneously electrified.
Further, the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=mod (serial number, longest time/time delay interval), and the time delay time=the time delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
The discrete access method of the NB-IoT intelligent street lamp terminal comprises the following steps:
step 1, a RESET pin of an NB-IOT communication chip of each street lamp terminal is connected to a control pin of a microcontroller of the street lamp terminal;
step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;
step 3, the time delay program starts counting down according to the time delay time;
step 4, when the time delay program is finished in a countdown mode, the microcontroller outputs a high level to a RESET pin of the NB-IOT communication chip;
and 5, enabling the RESET pin and the power pin of the NB-IOT communication chip to be simultaneously and electrically started, so that the current street lamp terminal is connected into a street lamp network.
Further, the specific steps of the step 2 are as follows:
step 2-1, obtaining a serial number of a local microcontroller;
step 2-2, obtaining a preset longest time and a preset time delay interval;
step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);
step 2-4, calculating a delay time, wherein the delay time=delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
The discrete access structure of the NB-IoT intelligent street lamp terminal comprises a power circuit, a lighting circuit, a microcontroller, an NB-IoT communication chip and a transmitting antenna, wherein the mains supply is connected to the power circuit, the power circuit is respectively connected with the lighting circuit and a power pin of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IoT communication chip through data wires, the NB-IoT communication chip is connected with the transmitting antenna, the power circuit is connected with an input end of a direct current power distributor (DCDU), and an output end of the direct current power distributor (DCDU) is connected with the power pin of the NB-IoT communication chip; the first control pin of the microcontroller is connected with the control end of a direct current power supply distributor (DCDU), a delay program is built in the microcontroller, each street lamp delay program randomly delays within the longest delay time range, the microcontroller outputs a high level to the control end of the direct current power supply distributor (DCDU) when the delay program is finished in a countdown mode, and the power supply pin of the NB-IOT communication chip is started when power is supplied.
Further, the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=mod (serial number, longest time/time delay interval), and the time delay time=the time delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
The discrete access method of the NB-IoT intelligent street lamp terminal comprises the following steps:
step 1, a direct current power supply distributor (DCDU) is connected in series between a power supply circuit and an NB-IOT communication chip of each street lamp terminal, and a control end of the direct current power supply distributor is connected to a control pin of a microcontroller of the street lamp terminal;
step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;
step 3, the time delay program starts counting down according to the time delay time;
step 4, when the time delay program is finished, the microcontroller outputs a high level to the control end of the direct current power supply distributor;
and 5, outputting direct current to an NB-IOT communication chip by the direct current power supply distributor, and starting the NB-IOT communication chip to enable the current street lamp terminal to be connected to a street lamp network.
Further, the specific steps of the step 2 are as follows:
step 2-1, obtaining a serial number of a local microcontroller;
step 2-2, obtaining a preset longest time and a preset time delay interval;
step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);
step 2-4, calculating a delay time, wherein the delay time=delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
By adopting the technical scheme, the invention is connected with the RESET interface of the NB-IOT communication module through the control line, and realizes the delay power-on function of the NB-IOT communication module through program control. Or the direct current power supply distributor is connected in series between the power supply circuit and the NB-IOT communication module, and then the microcontroller randomly delays to control the direct current power supply distributor to supply power to the NB-IOT communication chip without the RESET pin, so that the power-on time of each street lamp terminal is staggered to realize discrete access to the network. According to the invention, the terminal discrete access network is realized by controlling the power-on time of the NB-IOT communication chip, the problem of insufficient network resources caused by simultaneous network access of a large number of terminals is solved, meanwhile, the discretization of terminal service is realized, the uplink interference of the network is reduced, the quality of the NB-IOT network is improved, and the communication success rate of the NB-IOT network and the success rate of reporting data by the terminal are further improved. The invention can solve the problems of insufficient instantaneous network resources and greatly improved uplink interference level caused by simultaneous network access of a large number of terminals when the NB-IOT intelligent street lamp is powered on, and improves the communication success rate of the NB-IOT network and the success rate of reporting data by the terminals.
Drawings
The invention is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a conventional NB-IOT intelligent street lamp system;
fig. 2 is a schematic circuit diagram of an NB-IoT intelligent street lamp terminal in the prior art;
FIG. 3 is a schematic diagram of a discrete access architecture of an NB-IOT intelligent street lamp terminal in accordance with the present invention using an NB-IOT communication chip with a RESET pin;
FIG. 4 is a schematic diagram of a discrete access architecture of an NB-IOT intelligent street lamp terminal in accordance with the present invention using an NB-IOT communication chip without a RESET pin;
fig. 5 is a schematic flow diagram of a discrete access method of an NB-IoT intelligent street lamp terminal according to the present invention.
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in fig. 3, for NB-IOT communication chips without RESET pins, the RESET interface of the NB-IOT communication module is connected through control lines. The invention discloses a discrete access structure of an NB-IoT intelligent street lamp terminal, which comprises a power circuit, a lighting circuit, a microcontroller, NB-IOT communication chips and a transmitting antenna, wherein mains supply is accessed to the power circuit, the power circuit is respectively connected with the lighting circuit, the NB-IOT communication chips and power pins of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IOT communication chips through data wires, the NB-IOT communication chips are connected with the transmitting antenna, a control pin of the microcontroller is connected with RESET pins of the NB-IOT communication chips, a time delay program is built in the microcontroller, random time delay is carried out in the longest time delay range of each street lamp time delay program, the microcontroller outputs a high level to the RESET pins when the time delay program is finished in countdown, and the power pins and the RESET pins of the NB-IOT communication chips are started when the power pins and the RESET pins are simultaneously electrified.
Further, the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=mod (serial number, longest time/time delay interval), and the time delay time=the time delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
As shown in fig. 5, the discrete access method of the NB-IoT intelligent street lamp terminal includes the following steps:
step 1, a RESET pin of an NB-IOT communication chip of each street lamp terminal is connected to a control pin of a microcontroller of the street lamp terminal;
step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;
step 3, the time delay program starts counting down according to the time delay time;
step 4, when the time delay program is finished in a countdown mode, the microcontroller outputs a high level to a RESET pin of the NB-IOT communication chip;
and 5, enabling the RESET pin and the power pin of the NB-IOT communication chip to be simultaneously and electrically started, so that the current street lamp terminal is connected into a street lamp network.
Further, the specific steps of the step 2 are as follows:
step 2-1, obtaining a serial number of a local microcontroller;
step 2-2, obtaining a preset longest time and a preset time delay interval;
step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);
step 2-4, calculating a delay time, wherein the delay time=delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
As shown in fig. 4, as another implementation method, for an NB-IOT communication chip without a RESET pin, the power-on time and the discrete access network of the NB-IOT communication chip are controlled by adding a dc power distributor and controlling the power-on time of the dc power distributor (DCDU) by an MCU.
The invention discloses a discrete access structure of an NB-IoT intelligent street lamp terminal, which comprises a power circuit, a lighting circuit, a microcontroller, an NB-IoT communication chip and a transmitting antenna, wherein the mains supply is connected to the power circuit, the power circuit is respectively connected with the lighting circuit and a power pin of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IoT communication chip through data wires, the NB-IoT communication chip is connected with the transmitting antenna, the power circuit is connected with an input end of a direct current power distributor (DCDU), and an output end of the direct current power distributor (DCDU) is connected with the power pin of the NB-IoT communication chip; the first control pin of the microcontroller is connected with the control end of a direct current power supply distributor (DCDU), a delay program is built in the microcontroller, each street lamp delay program randomly delays within the longest delay time range, the microcontroller outputs a high level to the control end of the direct current power supply distributor (DCDU) when the delay program is finished in a countdown mode, and the power supply pin of the NB-IOT communication chip is started when power is supplied.
Further, the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=mod (serial number, longest time/time delay interval), and the time delay time=the time delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
As shown in fig. 5, the discrete access method of the NB-IoT intelligent street lamp terminal includes the following steps:
step 1, a direct current power supply distributor (DCDU) is connected in series between a power supply circuit and an NB-IOT communication chip of each street lamp terminal, and a control end of the direct current power supply distributor is connected to a control pin of a microcontroller of the street lamp terminal;
step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;
step 3, the time delay program starts counting down according to the time delay time;
step 4, when the time delay program is finished, the microcontroller outputs a high level to the control end of the direct current power supply distributor;
and 5, outputting direct current to an NB-IOT communication chip by the direct current power supply distributor, and starting the NB-IOT communication chip to enable the current street lamp terminal to be connected to a street lamp network.
Further, the specific steps of the step 2 are as follows:
step 2-1, obtaining a serial number of a local microcontroller;
step 2-2, obtaining a preset longest time and a preset time delay interval;
step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);
step 2-4, calculating a delay time, wherein the delay time=delay random number.
Further, the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
By adopting the technical scheme, the invention is connected with the RESET interface of the NB-IOT communication module through the control line, and realizes the delay power-on function of the NB-IOT communication module through program control. Or the direct current power supply distributor is connected in series between the power supply circuit and the NB-IOT communication module, and then the microcontroller randomly delays to control the direct current power supply distributor to supply power to the NB-IOT communication chip without the RESET pin, so that the power-on time of each street lamp terminal is staggered to realize discrete access to the network. According to the invention, the terminal discrete access network is realized by controlling the power-on time of the NB-IOT communication chip, the problem of insufficient network resources caused by simultaneous network access of a large number of terminals is solved, meanwhile, the discretization of terminal service is realized, the uplink interference of the network is reduced, the quality of the NB-IOT network is improved, and the communication success rate of the NB-IOT network and the success rate of reporting data by the terminal are further improved. The invention can solve the problems of insufficient instantaneous network resources and greatly improved uplink interference level caused by simultaneous network access of a large number of terminals when the NB-IOT intelligent street lamp is powered on, and improves the communication success rate of the NB-IOT network and the success rate of reporting data by the terminals.
It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. Embodiments and features of embodiments in this application may be combined with each other without conflict. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Claims (8)
- A discrete access method of an NB-IoT intelligent street lamp terminal is characterized in that the adopted discrete access structure of the NB-IoT intelligent street lamp terminal comprises a power circuit, a lighting circuit, a microcontroller, an NB-IoT communication chip and a transmitting antenna, mains supply is connected to the power circuit, the power circuit is respectively connected with the lighting circuit, the NB-IoT communication chip and power pins of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IoT communication chip through data wires, the NB-IoT communication chip is connected with the transmitting antenna, a control pin of the microcontroller is connected with a RESET pin of the NB-IoT communication chip, a delay program is built in the microcontroller, random delay is carried out on each street lamp delay program within the longest time range of delay, the microcontroller outputs a high level to the RESET pin when the delay program is counted down, and the power pins of the NB-IoT communication chip and the RESET pin are started when the power pins are simultaneously powered on; the method is characterized in that: the method comprises the following steps:step 1, a RESET pin of an NB-IOT communication chip of each street lamp terminal is connected to a control pin of a microcontroller of the street lamp terminal;step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;step 3, the time delay program starts counting down according to the time delay time;step 4, when the time delay program is finished in a countdown mode, the microcontroller outputs a high level to a RESET pin of the NB-IOT communication chip;and 5, enabling the RESET pin and the power pin of the NB-IOT communication chip to be simultaneously and electrically started, so that the current street lamp terminal is connected into a street lamp network.
- 2. The discrete access method of NB-IoT intelligent street lamp terminals according to claim 1, wherein: the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=MOD (serial number, longest time/time delay interval), and the time delay time=the time delay random number; the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
- 3. The discrete access method of NB-IoT intelligent street lamp terminals according to claim 1, wherein: the specific steps of the step 2 are as follows:step 2-1, obtaining a numerical value part of a serial number of a local microcontroller;step 2-2, obtaining a preset longest time and a preset time delay interval;step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);step 2-4, calculating a delay time, wherein the delay time=delay random number.
- 4. The discrete access method of NB-IoT intelligent street lamp terminals in accordance with claim 3, wherein: the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
- 5. The discrete access structure of the NB-IoT intelligent street lamp terminal comprises a power circuit, a lighting circuit, a microcontroller, an NB-IoT communication chip and a transmitting antenna, wherein the mains supply is connected to the power circuit, the power circuit is respectively connected with the lighting circuit and a power pin of the microcontroller, the microcontroller is respectively connected with the lighting circuit and the NB-IoT communication chip through data wires, the NB-IoT communication chip is connected with the transmitting antenna, the power circuit is connected with an input end of a direct-current power supply distributor, and an output end of the direct-current power supply distributor is connected with a power pin of the NB-IoT communication chip; a control pin of the microcontroller is connected with a control end of the direct current power supply distributor, a delay program is built in the microcontroller, each street lamp delay program randomly delays within the range of the longest delay time, the microcontroller outputs a high level to the control end of the direct current power supply distributor when the delay program is finished in a countdown mode, and the power supply pin of the NB-IOT communication chip is started when power is supplied; the method is characterized in that: the method comprises the following steps:step 1, a direct current power supply distributor is connected in series between a power supply circuit and an NB-IOT communication chip of each street lamp terminal, and a control end of the direct current power supply distributor is connected to a control pin of a microcontroller of the street lamp terminal;step 2, after the microcontroller of each street lamp terminal is powered on, calculating the random number of the current street lamp terminal, and calculating the time delay time based on the time delay random number;step 3, the time delay program starts counting down according to the time delay time;step 4, when the time delay program is finished, the microcontroller outputs a high level to the control end of the direct current power supply distributor;and 5, outputting direct current to an NB-IOT communication chip by the direct current power supply distributor, and starting the NB-IOT communication chip to enable the current street lamp terminal to be connected to a street lamp network.
- 6. The discrete access method of NB-IoT intelligent street lamp terminals in accordance with claim 5, wherein: the random time delay is calculated by using the serial number of the corresponding microcontroller, the time delay random number=MOD (serial number, longest time/time delay interval), and the time delay time=the time delay random number; the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
- 7. The discrete access method of NB-IoT intelligent street lamp terminals in accordance with claim 5, wherein: the specific steps of the step 2 are as follows:step 2-1, obtaining a numerical value part of a serial number of a local microcontroller;step 2-2, obtaining a preset longest time and a preset time delay interval;step 2-3, calculating a time delay random number, wherein the time delay random number=mod (serial number, longest time/time delay interval);step 2-4, calculating a delay time, wherein the delay time=delay random number.
- 8. The discrete access method of NB-IoT intelligent street lamp terminals in accordance with claim 7, wherein: the longest time is 10 seconds to 120 seconds; the time delay interval takes 10-100 ms.
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| US4414661A (en) * | 1981-07-02 | 1983-11-08 | Trancom Ab | Apparatus for communicating with a fleet of vehicles |
| CN108135057A (en) * | 2018-01-22 | 2018-06-08 | 江苏神宇北斗卫星科技有限公司 | A kind of NB-IoT single-lamp controllers for the transformation of wisdom street lamp |
| CN108471357A (en) * | 2018-03-13 | 2018-08-31 | 北京信息科技大学 | A kind of terminal access scheduling method and device based on narrowband Internet of Things |
| CN208905242U (en) * | 2018-04-28 | 2019-05-24 | 浙江永泰隆电子股份有限公司 | Intelligent controller for road lamp based on narrowband Internet of Things NB-IOT |
| CN209767862U (en) * | 2018-11-10 | 2019-12-10 | 桂林航天工业学院 | wisdom street lamp control system based on internet and narrowband thing networking |
| CN110139452A (en) * | 2019-07-10 | 2019-08-16 | 南京理控物联技术有限公司 | A method of it improving NB-IoT single-lamp controller and communicates success rate |
| CN111526530A (en) * | 2020-05-15 | 2020-08-11 | 广东技术师范大学 | Optimization method of random access congestion control algorithm for NB-IoT |
| CN112672458A (en) * | 2021-01-02 | 2021-04-16 | 南京普天大唐信息电子有限公司 | Method and system for rapidly deploying intelligent street lamp internet of things |
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