The wireless transceiver module is mainly used for signal transmission to achieve multi-functional purposes such as communication and wireless control. General wireless modules are used in a variety of occasions, and the following mainly introduces three kinds.understand Wireless Module In order to better serve customers and reflect the core competitiveness of products. https://www.hkulike.com/

　　

　　First, used for channel control

　　

　　What is channel control? Channel control is divided into parallel and multi-channel. This kind of control is generally applied to the control of complex remote-controlled robots, and the safety protection control of some places can be controlled and driven by the receiving and sending signals of wireless modules.

　　

　　Second, for the development of wireless communication networks

　　

　　For professionals, the link of wireless communication network needs the application of topological structure, and only with this structure can the application value be realized by using the transceiver system of wireless module. On the one hand, this kind of transmitting and receiving module is cheap, and the cost of forming a star topology is relatively low; On the other hand, the transmitting and receiving module can adopt modular design, which is small in size, convenient to use and easy to integrate. This transmitting and receiving module is very practical for wireless networks with low communication speed and close distance.

　　

　　Third, used for serial data transmission

　　

　　Usually, many control instruments and devices use serial port, and communication with these devices must meet the requirements of serial port, and the transmission rate and electrical characteristics must meet the serial port standard. Some special places, industrial control sites. When it is necessary to use wireless transmission mode, the transmitting and receiving module mentioned in this paper can be naturally selected. However, it must be explained here that in order to adopt this communication method, the corresponding software must be compiled at the transmitter and receiver to realize the file format conversion, so as to achieve the purpose of wireless communication.

　　1. List of questions and alliance answers for operators to deploy NB-IoTAs a representative of the industry, RF Module It is necessary to set a certain example for peers and lead the way in product quality. https://www.hkulike.com/

　　

　　How is the network architecture of NB-IoT composed?

　　

　　Building vertical industry application of Internet of Things based on NB-IoT technology will tend to be simpler and the division of labor will be clearer.

　　

　　How do domestic and foreign operators divide the frequency bands of NB-IoT?

　　

　　Most operators in the world use the 900MHz frequency band to deploy NB-IoT, and some operators deploy it in the 800MHz frequency band. China Unicom’s NB-IoT is deployed in 900MHz and 1800MHz frequency bands, and only 900MHz can be tested at present. In order to build the NB-IoT Internet of Things, China Mobile will obtain the FDD license and allow the existing 900MHz and 1800MHz frequency bands to be re-cultivated. China Telecom’s NB-IoT is deployed in the 800MHz band, with a frequency of only 5MHz.

　　

　　NB-IoT network deployment schedule?

　　

　　In 2016, China Unicom launched NB-IoT field-scale networking tests based on 900MHz and 1800MHz in seven cities (Beijing, Shanghai, Guangzhou, Shenzhen, Fuzhou, Changsha and Yinchuan), as well as more than six business application demonstrations. In 2018, the commercial deployment of NB-IoT will be fully promoted nationwide. China Mobile plans to start the commercialization of NB-IoT in 2017. China Telecom plans to deploy NB-IoT network in the first half of 2017. Huawei and six operators (China Unicom, China Mobile, Vodafone, Emirates Telecom, Telefonica and Italia Telecom) set up six NB-IoT open laboratories around the world, focusing on NB-IoT business innovation, industry development, interoperability testing and product compatibility verification. ZTE and China Mobile completed the technical verification demonstration of NB-IoT protocol in the laboratory of China Mobile’s 5G Joint Innovation Center.

　　

　　Can non-operators deploy NB-IoT networks?

　　

　　The answer is no.

　　

　　Does NB-IoT need real-name registration system?

　　

　　All needs, tracked to the responsible subject.

　　

　　Does NB-IoT all adopt eSIM?

　　

　　The product features of NB-IoT are that it can work without installation and configuration, and it can be directly connected to the network by booting, and it supports functions such as automatic equipment registration and air upgrade. SIM card and eSIM will coexist for a long time, and operators refuse the soft SIM mode.

　　

　　What is the operator’s plan to quit the 2G/3G network?

　　

　　China Unicom may gradually close its 2G network in 2018, and in some places it may close its 3G network. Japan’s mobile operators have all shut down 2G networks, and AT&T in the United States, Telstra and Optus in Australia have announced plans to shut down 2G networks. Telenor plans to close its 3G network in Norway in 2020, followed by its 2G network in 2025. Some operators consider that there are more than 100 million GPRS IOT terminals and low-end GSM mobile phones for a long time, and the cost of GSM is lower than that of LTE for a long time because of its low complexity and no patent fees. Therefore, most operators will maintain the GSM frequency band to continue their operations for a long time.

　　

　　Do operators support NB-IoT roaming?

　　

　　The answer is no.

　　

　　How can operators ensure the stability of NB-IoT network?

　　

　　NB-IoT is directly deployed in GSM, UMTS or LTE networks, which can be reused with existing network base stations to reduce deployment costs and achieve smooth upgrade. However, the use of a separate 180KHz frequency band does not occupy the voice and data bandwidth of existing networks, ensuring that traditional services and future Internet of Things services can be carried out stably and reliably at the same time.

　　

　　The control and bearer of NB-IoT are separated, with signaling on the control plane and data on the bearer plane. If it is a low-rate service, it goes directly to the control plane, and no dedicated bearer is established, which omits the signaling process of establishing a link between NAS and the core network and shortens the wake-up recovery delay. NB-IoT is an operational telecommunications network. This is the key to distinguish NB-IoT from GPRS, LoRa, SigFox and other technologies.

　　

　　How can operators make use of NB-IoT network to make profits?

　　

　　Operators’ existing areas such as QoS service quality assurance, network security, telecom-level billing and big data services continue to maintain their industry advantages. NB-IoT network allows operators to strengthen their business service capabilities in the field of Internet of Things, including cloud service provision, mass customer management, real-name authentication of Internet of Things, system general contracting integration, and high-end customized services for large customers.

　　

　　Price issues related to NB-IoT?

　　

　　Operator’s charges: one is based on flow and the other is based on message, and the trend will be lower than the price of GPRS cost chip: lower than the price of 2G main chip, with a reasonable expected price of $1. Module price: lower than the price of GPRS module, with a reasonable expected price of $2. Terminal price: pricing maintenance cost according to actual function: far lower than the existing network maintenance cost subsidy policy: operators will provide larger operating subsidies in the early stage.

　　

　　2. List of questions and answers about NB-IoT technology.

　　

　　Will NB-IoT standard support TDD LTE?

　　

　　At present, FDD LTE system supports NB-IoT technology, while TDD LTE system does not support NB-IoT technology. The physical layer design of NB-IoT mostly follows LTE system technology, such as SC-FDMA for uplink and OFDM for downlink. The design of high-level protocol follows LTE protocol, and its function is enhanced according to its small data packet, low power consumption and large connection characteristics. The core network is connected based on S1 interface, which supports independent deployment and upgrade deployment.

　　

　　Does NB-IoT support base station positioning?

　　

　　R13 does not support base station location, but the operator network can do private solutions, such as location based on cell ID, which will not affect the terminal, and only need the network to increase the location server and contact with the base station. R14 plans to enhance positioning, supporting E-CID, UTDOA or OTDOA, and the operator’s desired positioning accuracy target is within 50 meters.

　　

　　Considering the terminal complexity, UTDOA is better, because it has little influence on the terminal, and in the case of enhanced coverage (basement 164dB), UTDOA (uplink) power consumption is lower; If coverage enhancement is not needed in most scenarios, OTDOA (downlink) will be better from the perspective of network capacity.

　　

　　What are the deployment methods of NB-IoT?

　　

　　NB-IoT supports three different deployment modes, namely independent deployment, guard band deployment and in-band deployment. Independent deployment: A separate frequency band can be used, which is suitable for re-cultivation in GSM frequency band. Guard band deployment: The marginal useless frequency band in LTE system can be utilized. In-band deployment: Any resource block in the middle of LTE carrier can be utilized.

　　

　　What modulation and demodulation technology does NB-IoT use?

　　

　　OFDMA is used for downlink, and the subcarrier spacing is 15kHz. The uplink adopts SC-FDMA, single-tone: 3.75kHz/15kHz, and multi-tone: 15kHz. Only need to support half duplex, with a separate synchronization signal. The terminal supports the indication of Single-tone and Multi-tone capabilities. The MAC/RLC/PDCP/RRC layer processing is based on the existing LTE processes and protocols, and the physical layer is optimized.

　　

　　What are the number of connected users and active users of NB-IoT base station?

　　

　　NB-IoT has 50-100 times the uplink capacity improvement compared with 2G/3G/4G, and NB-IoT can provide 50-100 times the access number compared with the existing wireless technology under the same base station. Under the frequency of 200KHz, according to the simulation test data, a single base station cell can support 50,000 NB-IoT terminals to access.

　　

　　What is the coverage of NB-IoT base station?

　　

　　NB-IoT has a gain of 20dB higher than that of LTE and GPRS base stations, and it is expected to cover underground garages, basements, underground pipelines and other places where signals are difficult to reach. According to the simulation test data, in the independent deployment mode, the coverage capacity of NB-IoT can reach 164dB, and the in-band deployment and guard band deployment need to be simulated and tested.

　　

　　What is the uplink and downlink transmission rate of NB-IoT?

　　

　　NB-IoT RF bandwidth is 200kHz. Downlink rate: greater than 160kbps and less than 250kbps. Uplink rate: greater than 160kbps and less than 250 kbps (multi-tone)/200 kbps (single-tone).

　　

　　Does NB-IoT support retransmission mechanism?

　　

　　NB-IoT adopts retransmission (up to 200 times) and low-order modulation to enhance coverage.

　　

　　Does NB-IoT support voice?

　　

　　NB-IoT supports Push to Talk without coverage enhancement. In the scenario of enhanced coverage of 20dB, only similar voicemails can be supported. NB-IoT does not support VoLTE, which requires too high delay, and the high-level protocol stack needs QoS guarantee, which will increase the cost.

　　

　　Why does the chip of NB-IoT consume low power?

　　

　　The energy consumed by a device is related to the amount or rate of data, and the size of data packets sent per unit time determines the size of power consumption. NB-IoT introduces eDRX power saving technology and PSM power saving mode, which further reduces power consumption and prolongs battery life. NB-IoT can keep devices online all the time, but it can save power by reducing unnecessary signaling and not accepting paging information when in PSM state.

　　

　　In PSM mode, the terminal is still registered in the network, but the signaling is unreachable, which makes the terminal stay in deep sleep for a longer time to save electricity. EDRX power saving technology further prolongs the sleep period of the terminal in idle mode, reduces unnecessary startup of the receiving unit, and greatly improves the downlink accessibility compared with PSM.

　　

　　Does NB-IoT sleep wake-up mode affect battery life?

　　

　　At present, the working time given by NB-IoT is based on simulation data, without considering the battery itself and environmental factors, such as self-discharge and aging of the battery, high and low temperature environmental impact, etc. In actual use, it is necessary to comprehensively evaluate the power supply time of the battery according to the actual situation. NB-IoT adopts the power-saving scheme of sleep wake-up. When the battery is awakened during sleep, it will receive instantaneous strong current, which will greatly affect the battery life. The application of meter reading usually adopts lithium thionyl chloride (Li/SOCl2) battery and super capacitor. Consumer electronics and others should be powered by li-polymer.

　　

　　Why are NB-IoT chips cheap?

　　

　　Low speed, low power consumption and low bandwidth bring low cost advantages. Low speed: it means that no large cache is needed, so the cache can be small and the DSP configuration is low; Low power consumption: it means that RF design requirements are low, and small PA can be realized; Low bandwidth: It means that there is no need for complicated equalization algorithm … These factors make the NB-IoT chip small, so the cost will be reduced.

　　

　　Taking a certain chip as an example, NB-IoT chip integrates BB, AP, Flash and battery management, and reserves the function of sensor set. The AP includes three ARM-M0 cores, and each M0 core is responsible for the application, security and communication functions respectively, which facilitates the function management and reduces the cost and power consumption.

　　

　　What is the range of NB-IoT to the device movement rate?

　　

　　NB-IoT is suitable for application scenarios with weak mobility support (such as intelligent meter reading, intelligent parking, etc.), while simplifying the complexity of the terminal and reducing the power consumption of the terminal. NB-IoT does not support mobility management in connected state, including related measurement, measurement report, handover, etc.

　　

　　What is the network delay of NB-IoT?

　　

　　NB-IoT allows a delay of about 10s, but it can support a lower delay, such as about 6s, in the environment of maximum coupling loss.

　　

　　3. Deployment of NB-IoT technology in various vertical application fields of the Internet of Things.

　　

　　What is the deployment cost of NB-IoT vertical application?

　　

　　The deployment cost of NB-IoT vertical application field includes hardware cost, network cost, installation cost and service cost. If we want to realize the scale of application field, we must reduce the deployment cost.

　　

　　What is the focus of NB-IoT in vertical application field?

　　

　　NB-IoT technology can meet the requirements of low-rate services with low power consumption, long standby, deep coverage and large capacity, and is more suitable for static services, low sensitivity to time delay, discontinuous movement and real-time data transmission. 1. Autonomous anomaly reporting business types: such as smoke alarm detectors, abnormal equipment operation, etc. The uplink data volume is extremely small (on the order of ten bytes), and the cycle is mostly in years and months. 2. Business types of autonomous periodic reporting: such as remote meter reading of public utilities and environmental monitoring, etc. The uplink data volume is small (on the order of 100 bytes), and the cycle is mostly in days and hours. 3. Service type of remote control instruction:

　　

　　For example, if the equipment is turned on/off remotely, and the equipment triggers to send an uplink report, the downlink data amount is very small (on the order of ten bytes), and the cycle is mostly in days and hours. 4. Software remote update service type: such as software patch/update, and the uplink and downlink need a large amount of data (kilobyte level), and the cycle is mostly in days and hours.

　　1. List of questions and alliance answers for operators to deploy NB-IoTAs we all know, Wireless Module The emergence of the market is worthy of many people’s attention, which has aroused the waves of the whole market. https://www.hkulike.com/

　　

　　How is the network architecture of NB-IoT composed?

　　

　　Building vertical industry application of Internet of Things based on NB-IoT technology will tend to be simpler and the division of labor will be clearer.

　　

　　How do domestic and foreign operators divide the frequency bands of NB-IoT?

　　

　　Most operators in the world use the 900MHz frequency band to deploy NB-IoT, and some operators deploy it in the 800MHz frequency band. China Unicom’s NB-IoT is deployed in 900MHz and 1800MHz frequency bands, and only 900MHz can be tested at present. In order to build the NB-IoT Internet of Things, China Mobile will obtain the FDD license and allow the existing 900MHz and 1800MHz frequency bands to be re-cultivated. China Telecom’s NB-IoT is deployed in the 800MHz band, with a frequency of only 5MHz.

　　

　　NB-IoT network deployment schedule?

　　

　　In 2016, China Unicom launched NB-IoT field-scale networking tests based on 900MHz and 1800MHz in seven cities (Beijing, Shanghai, Guangzhou, Shenzhen, Fuzhou, Changsha and Yinchuan), as well as more than six business application demonstrations. In 2018, the commercial deployment of NB-IoT will be fully promoted nationwide. China Mobile plans to start the commercialization of NB-IoT in 2017. China Telecom plans to deploy NB-IoT network in the first half of 2017. Huawei and six operators (China Unicom, China Mobile, Vodafone, Emirates Telecom, Telefonica and Italia Telecom) set up six NB-IoT open laboratories around the world, focusing on NB-IoT business innovation, industry development, interoperability testing and product compatibility verification. ZTE and China Mobile completed the technical verification demonstration of NB-IoT protocol in the laboratory of China Mobile’s 5G Joint Innovation Center.

　　

　　Can non-operators deploy NB-IoT networks?

　　

　　The answer is no.

　　

　　Does NB-IoT need real-name registration system?

　　

　　All needs, tracked to the responsible subject.

　　

　　Does NB-IoT all adopt eSIM?

　　

　　The product features of NB-IoT are that it can work without installation and configuration, and it can be directly connected to the network by booting, and it supports functions such as automatic equipment registration and air upgrade. SIM card and eSIM will coexist for a long time, and operators refuse the soft SIM mode.

　　

　　What is the operator’s plan to quit the 2G/3G network?

　　

　　China Unicom may gradually close its 2G network in 2018, and in some places it may close its 3G network. Japan’s mobile operators have all shut down 2G networks, and AT&T in the United States, Telstra and Optus in Australia have announced plans to shut down 2G networks. Telenor plans to close its 3G network in Norway in 2020, followed by its 2G network in 2025. Some operators consider that there are more than 100 million GPRS IOT terminals and low-end GSM mobile phones for a long time, and the cost of GSM is lower than that of LTE for a long time because of its low complexity and no patent fees. Therefore, most operators will maintain the GSM frequency band to continue their operations for a long time.

　　

　　Do operators support NB-IoT roaming?

　　

　　The answer is no.

　　

　　How can operators ensure the stability of NB-IoT network?

　　

　　NB-IoT is directly deployed in GSM, UMTS or LTE networks, which can be reused with existing network base stations to reduce deployment costs and achieve smooth upgrade. However, the use of a separate 180KHz frequency band does not occupy the voice and data bandwidth of existing networks, ensuring that traditional services and future Internet of Things services can be carried out stably and reliably at the same time.

　　

　　The control and bearer of NB-IoT are separated, with signaling on the control plane and data on the bearer plane. If it is a low-rate service, it goes directly to the control plane, and no dedicated bearer is established, which omits the signaling process of establishing a link between NAS and the core network and shortens the wake-up recovery delay. NB-IoT is an operational telecommunications network. This is the key to distinguish NB-IoT from GPRS, LoRa, SigFox and other technologies.

　　

　　How can operators make use of NB-IoT network to make profits?

　　

　　Operators’ existing areas such as QoS service quality assurance, network security, telecom-level billing and big data services continue to maintain their industry advantages. NB-IoT network allows operators to strengthen their business service capabilities in the field of Internet of Things, including cloud service provision, mass customer management, real-name authentication of Internet of Things, system general contracting integration, and high-end customized services for large customers.

　　

　　Price issues related to NB-IoT?

　　

　　Operator’s charges: one is based on flow and the other is based on message, and the trend will be lower than the price of GPRS cost chip: lower than the price of 2G main chip, with a reasonable expected price of $1. Module price: lower than the price of GPRS module, with a reasonable expected price of $2. Terminal price: pricing maintenance cost according to actual function: far lower than the existing network maintenance cost subsidy policy: operators will provide larger operating subsidies in the early stage.

　　

　　2. List of questions and answers about NB-IoT technology.

　　

　　Will NB-IoT standard support TDD LTE?

　　

　　At present, FDD LTE system supports NB-IoT technology, while TDD LTE system does not support NB-IoT technology. The physical layer design of NB-IoT mostly follows LTE system technology, such as SC-FDMA for uplink and OFDM for downlink. The design of high-level protocol follows LTE protocol, and its function is enhanced according to its small data packet, low power consumption and large connection characteristics. The core network is connected based on S1 interface, which supports independent deployment and upgrade deployment.

　　

　　Does NB-IoT support base station positioning?

　　

　　R13 does not support base station location, but the operator network can do private solutions, such as location based on cell ID, which will not affect the terminal, and only need the network to increase the location server and contact with the base station. R14 plans to enhance positioning, supporting E-CID, UTDOA or OTDOA, and the operator’s desired positioning accuracy target is within 50 meters.

　　

　　Considering the terminal complexity, UTDOA is better, because it has little influence on the terminal, and in the case of enhanced coverage (basement 164dB), UTDOA (uplink) power consumption is lower; If coverage enhancement is not needed in most scenarios, OTDOA (downlink) will be better from the perspective of network capacity.

　　

　　What are the deployment methods of NB-IoT?

　　

　　NB-IoT supports three different deployment modes, namely independent deployment, guard band deployment and in-band deployment. Independent deployment: A separate frequency band can be used, which is suitable for re-cultivation in GSM frequency band. Guard band deployment: The marginal useless frequency band in LTE system can be utilized. In-band deployment: Any resource block in the middle of LTE carrier can be utilized.

　　

　　What modulation and demodulation technology does NB-IoT use?

　　

　　OFDMA is used for downlink, and the subcarrier spacing is 15kHz. The uplink adopts SC-FDMA, single-tone: 3.75kHz/15kHz, and multi-tone: 15kHz. Only need to support half duplex, with a separate synchronization signal. The terminal supports the indication of Single-tone and Multi-tone capabilities. The MAC/RLC/PDCP/RRC layer processing is based on the existing LTE processes and protocols, and the physical layer is optimized.

　　

　　What are the number of connected users and active users of NB-IoT base station?

　　

　　NB-IoT has 50-100 times the uplink capacity improvement compared with 2G/3G/4G, and NB-IoT can provide 50-100 times the access number compared with the existing wireless technology under the same base station. Under the frequency of 200KHz, according to the simulation test data, a single base station cell can support 50,000 NB-IoT terminals to access.

　　

　　What is the coverage of NB-IoT base station?

　　

　　NB-IoT has a gain of 20dB higher than that of LTE and GPRS base stations, and it is expected to cover underground garages, basements, underground pipelines and other places where signals are difficult to reach. According to the simulation test data, in the independent deployment mode, the coverage capacity of NB-IoT can reach 164dB, and the in-band deployment and guard band deployment need to be simulated and tested.

　　

　　What is the uplink and downlink transmission rate of NB-IoT?

　　

　　NB-IoT RF bandwidth is 200kHz. Downlink rate: greater than 160kbps and less than 250kbps. Uplink rate: greater than 160kbps and less than 250 kbps (multi-tone)/200 kbps (single-tone).

　　

　　Does NB-IoT support retransmission mechanism?

　　

　　NB-IoT adopts retransmission (up to 200 times) and low-order modulation to enhance coverage.

　　

　　Does NB-IoT support voice?

　　

　　NB-IoT supports Push to Talk without coverage enhancement. In the scenario of enhanced coverage of 20dB, only similar voicemails can be supported. NB-IoT does not support VoLTE, which requires too high delay, and the high-level protocol stack needs QoS guarantee, which will increase the cost.

　　

　　Why does the chip of NB-IoT consume low power?

　　

　　The energy consumed by a device is related to the amount or rate of data, and the size of data packets sent per unit time determines the size of power consumption. NB-IoT introduces eDRX power saving technology and PSM power saving mode, which further reduces power consumption and prolongs battery life. NB-IoT can keep devices online all the time, but it can save power by reducing unnecessary signaling and not accepting paging information when in PSM state.

　　

　　In PSM mode, the terminal is still registered in the network, but the signaling is unreachable, which makes the terminal stay in deep sleep for a longer time to save electricity. EDRX power saving technology further prolongs the sleep period of the terminal in idle mode, reduces unnecessary startup of the receiving unit, and greatly improves the downlink accessibility compared with PSM.

　　

　　Does NB-IoT sleep wake-up mode affect battery life?

　　

　　At present, the working time given by NB-IoT is based on simulation data, without considering the battery itself and environmental factors, such as self-discharge and aging of the battery, high and low temperature environmental impact, etc. In actual use, it is necessary to comprehensively evaluate the power supply time of the battery according to the actual situation. NB-IoT adopts the power-saving scheme of sleep wake-up. When the battery is awakened during sleep, it will receive instantaneous strong current, which will greatly affect the battery life. The application of meter reading usually adopts lithium thionyl chloride (Li/SOCl2) battery and super capacitor. Consumer electronics and others should be powered by li-polymer.

　　

　　Why are NB-IoT chips cheap?

　　

　　Low speed, low power consumption and low bandwidth bring low cost advantages. Low speed: it means that no large cache is needed, so the cache can be small and the DSP configuration is low; Low power consumption: it means that RF design requirements are low, and small PA can be realized; Low bandwidth: It means that there is no need for complicated equalization algorithm … These factors make the NB-IoT chip small, so the cost will be reduced.

　　

　　Taking a certain chip as an example, NB-IoT chip integrates BB, AP, Flash and battery management, and reserves the function of sensor set. The AP includes three ARM-M0 cores, and each M0 core is responsible for the application, security and communication functions respectively, which facilitates the function management and reduces the cost and power consumption.

　　

　　What is the range of NB-IoT to the device movement rate?

　　

　　NB-IoT is suitable for application scenarios with weak mobility support (such as intelligent meter reading, intelligent parking, etc.), while simplifying the complexity of the terminal and reducing the power consumption of the terminal. NB-IoT does not support mobility management in connected state, including related measurement, measurement report, handover, etc.

　　

　　What is the network delay of NB-IoT?

　　

　　NB-IoT allows a delay of about 10s, but it can support a lower delay, such as about 6s, in the environment of maximum coupling loss.

　　

　　3. Deployment of NB-IoT technology in various vertical application fields of the Internet of Things.

　　

　　What is the deployment cost of NB-IoT vertical application?

　　

　　The deployment cost of NB-IoT vertical application field includes hardware cost, network cost, installation cost and service cost. If we want to realize the scale of application field, we must reduce the deployment cost.

　　

　　What is the focus of NB-IoT in vertical application field?

　　

　　NB-IoT technology can meet the requirements of low-rate services with low power consumption, long standby, deep coverage and large capacity, and is more suitable for static services, low sensitivity to time delay, discontinuous movement and real-time data transmission. 1. Autonomous anomaly reporting business types: such as smoke alarm detectors, abnormal equipment operation, etc. The uplink data volume is extremely small (on the order of ten bytes), and the cycle is mostly in years and months. 2. Business types of autonomous periodic reporting: such as remote meter reading of public utilities and environmental monitoring, etc. The uplink data volume is small (on the order of 100 bytes), and the cycle is mostly in days and hours. 3. Service type of remote control instruction:

　　

　　For example, if the equipment is turned on/off remotely, and the equipment triggers to send an uplink report, the downlink data amount is very small (on the order of ten bytes), and the cycle is mostly in days and hours. 4. Software remote update service type: such as software patch/update, and the uplink and downlink need a large amount of data (kilobyte level), and the cycle is mostly in days and hours.

　　In the rapidly evolving digital communication landscape, LCD signage has emerged as a vital tool for efficiently and accurately delivering information. Often referred to as LCD advertising displays, electronic displays, or information screens, these devices serve diverse roles across education, business, healthcare, and public spaces.according to advertising screen Industry veterans said that its development will still be in a good situation. https://chestnuter.com/

　　

　　LCD signage refers to physical or electronic displays designed to convey information to an audience. It is a versatile medium capable of delivering everything from announcements and schedules to interactive content and multimedia presentations.

　　

　　lcd advertising

　　

　　Functions of LCD Signage

　　

　　Traditional bulletin boards, typically found in schools, offices, and community centers, are static displays that rely on physical materials like paper and pins. Updating content on these boards requires manual effort, making the process time-consuming and inflexible. While simple and cost-effective, this method lacks the agility and immediacy needed for frequent information updates.

　　

　　LCD signage, on the other hand, has revolutionized this process by supporting dynamic content updates, multimedia presentations, and remote management. These electronic displays can showcase a wide range of content, including text, images, videos, and real-time data. Their dynamic nature allows for instant updates, and content can be remotely controlled through multimedia messaging software. This is particularly advantageous in environments where information changes frequently or needs to be broadcast across multiple locations simultaneously.

　　

　　Interactive LCD signage takes this a step further by integrating touchscreens or other interactive features, enabling users to engage directly with the content. This interactivity is especially beneficial in settings like shopping malls and airport self-service kiosks, where it helps users quickly access the information they need.

　　

　　Innovative Applications of LCD Signage

　　

　　In corporate settings, LCD screens placed in high-traffic areas can share company news, employee achievements, and important announcements, fostering communication and keeping employees informed and engaged. For example, a display in a company lobby can welcome visitors and provide key organizational information.

　　

　　Educational institutions can leverage LCD signage in classrooms to advertising display daily schedules, event timelines, and important announcements. Interactive signage can also enhance teaching by allowing teachers to access relevant materials with a single click, making the learning experience more engaging and interactive.

　　

　　Healthcare facilities use LCD signage to manage patient flow and alleviate staff workload. Hospital signage can display patient information, visiting hours, health tips, and emergency alerts, keeping patients and visitors well-informed.

　　

　　Retailers utilize LCD signage to promote products, display advertisements, and provide customer information, thereby enhancing the shopping experience and driving sales. For instance, retail stores can use these displays to showcase promotions, new products, and customer reviews to attract shoppers and influence purchasing decisions.

　　

　　Transportation hubs such as airports and train stations rely on LCD screens to provide real-time schedules, delay information, gate details, and travel advisories, helping passengers stay informed and reducing anxiety. Additionally, these screens offer crucial updates, such as emergency instructions.

　　

　　City councils deploy LCD signage in public spaces to broadcast public announcements, weather updates, and emergency alerts, ensuring that vital information reaches a broad audience.

　　

　　Benefits of LCD Signage with Electronic Displays

　　

　　Compared to traditional bulletin boards, LCD signage with electronic advertising displays offers numerous advantages. It enables real-time updates, ensuring that information is always current. The ability to display multimedia content makes information more engaging and easier to comprehend. Remote management allows for quick updates and changes without requiring physical intervention. Over time, LCD signage proves more cost-effective by reducing the need for printed materials and manual updates, thus lowering paper consumption and benefiting the environment.

　　

　　In conclusion, LCD signage is playing an increasingly important role in modern information dissemination. With its diverse functions and significant advantages, it is poised to demonstrate even greater value across various sectors in the future.

　　Optical fibers and network cables have different interface standards. Wired networks typically use an RJ45 port, while optical fibers require an adapter, making the process more complex and requiring expensive tools, which are not ideal for personal use. Additionally, installing, testing, and replacing network cables is straightforward, making them suitable for short-term use scenarios. On the other hand, optical fibers have higher maintenance costs and are better suited for long-term applications. Although optical fibers themselves are relatively inexpensive, the cost of splicing them ranges from 20 to 50 yuan per splice. As the number of splicing points increases, so does the overall cost. Moreover, optical fiber networking requires compatible network port-switching equipment.In the past ten years, fiber optic cables Defeated many competitors, courageously advanced in the struggle, and polished many good products for customers. https://kechengdg.com/

　　

　　In summary, both manufacturing and maintenance costs for optical fibers are higher compared to network cables.

　　

　　optical fiber

　　

　　While optical fiber offers superior transmission speed compared to network cables, it is not suitable for all scenarios. The optical fibers commonly used in current project networking are primarily single-core sheathed cables, costing about 0.5 yuan per meter. However, these sheathed optical cables are more prone to breakage, particularly at the joints, when compared to network cables.

　　

　　optical fiber

　　

　　In today’s networking setups, a combination of network cables and optical fibers is often used, and it is unlikely that network cables will be entirely replaced by optical fibers.

　　JZX891 data transmission module is a high-integration micro-power half-duplex wireless data transmission module, which adopts “SI” high-performance RF chip and high-speed single chip microcomputer. The module provides 8 channels, adopts national measurement frequency points, and is equipped with professional setting software for users to change parameters. The module adopts transparent transmission mode, and can transmit data of any size without the need for users to write setting and transmission programs. The module is small in size, wide in operating voltage and convenient to use.from RF Module Looking at the development prospects, the future will always bring positive effects. https://www.hkulike.com/

　　

　　Functional features:

　　

　　* Working frequency is 470-510MHz.

　　

　　* Transmission distance is 1500m (1200bps).

　　

　　* GFSK modulation method

　　

　　* transparent transmission mode

　　

　　* Built-in watchdog to ensure long-term reliable operation.

　　

　　* UART/TTL, RS232 and RS485 interfaces

　　

　　* Convenient and flexible software programming

　　

　　* Large 512bytes data buffer.

　　

　　* Suitable for built-in installation

　　

　　Scope of application:

　　

　　* Automatic meter reading and charging system for water, electricity, gas and heating;

　　

　　* intelligent wireless PDA terminal;

　　

　　* Wireless queuing equipment;

　　

　　* burglar alarm;

　　

　　:: Smart cards;

　　

　　* Automatic control of medical and electronic instruments;

　　

　　* Intelligent teaching equipment;

　　

　　* Intelligent control of household appliances and lighting;

　　

　　* wireless hanging scale, electronic scale for wireless transmission;

　　Optical fibers and network cables have different interface standards. Wired networks typically use an RJ45 port, while optical fibers require an adapter, making the process more complex and requiring expensive tools, which are not ideal for personal use. Additionally, installing, testing, and replacing network cables is straightforward, making them suitable for short-term use scenarios. On the other hand, optical fibers have higher maintenance costs and are better suited for long-term applications. Although optical fibers themselves are relatively inexpensive, the cost of splicing them ranges from 20 to 50 yuan per splice. As the number of splicing points increases, so does the overall cost. Moreover, optical fiber networking requires compatible network port-switching equipment.We have every reason to believe. fiber optic cables It will become the mainstream of the industry and will gradually affect more and more people. https://kechengdg.com/

　　

　　In summary, both manufacturing and maintenance costs for optical fibers are higher compared to network cables.

　　

　　optical fiber

　　

　　While optical fiber offers superior transmission speed compared to network cables, it is not suitable for all scenarios. The optical fibers commonly used in current project networking are primarily single-core sheathed cables, costing about 0.5 yuan per meter. However, these sheathed optical cables are more prone to breakage, particularly at the joints, when compared to network cables.

　　

　　optical fiber

　　

　　In today’s networking setups, a combination of network cables and optical fibers is often used, and it is unlikely that network cables will be entirely replaced by optical fibers.

　　Smart advertising machines have long been widely used in the healthcare field. Now let¨s turn our attention to smart advertising machines in clinics. Although clinics are not as busy as hospitals, there is still a lot of information to be conveyed. Smart advertising machines can help clinics provide better services to customers in many ways.In order to achieve the goal, advertising screen Turn cocoon into butterfly, constantly polish product quality, improve business ability, and finally have a place in the market. https://chestnuter.com/

　　

　　smart advertising machines

　　

　　Ways to Serve Customers

　　

　　1. Daily Health Tips

　　

　　Set up an easily visible screen in the waiting area or consultation room to display daily health tips, including nutrition, chronic disease management, etc. You can also share some interesting content so that customers can gain health knowledge in a relaxed atmosphere.

　　

　　2. Seasonal health alerts

　　

　　Provide corresponding health advice according to different seasons, such as allergy protection in spring, sun protection and moisturizing in summer, and disease prevention in winter.

　　

　　3. Product and service promotion

　　

　　Introduce the products and services provided by the clinic, including basic medicines, new products, etc. By making attractive slides, show the characteristics, efficacy and usage of the products.

　　

　　4. General Medication Information and Guidelines

　　

　　Inform customers of general medication guidelines, such as when to take medication, whether to take with food, and what to do if you forget to take medication or take an overdose. For new or prescribed medications, provide more detailed information, including instructions for use, potential side effects and interactions, etc.

　　

　　5. Scheduling Appointments

　　

　　If the clinic offers additional services, such as health checks, vaccinations, etc., list these services on the smart advertising machine so that customers can learn about them and make appointments.

　　

　　6. Prescription preparation notification

　　

　　Use the screen to notify customers of the prescription preparation status and reduce the waiting time of customers. At the same time, promote online booking services to facilitate customers to start consultations at home and reduce waiting time in the clinic.

　　

　　Notes

　　

　　1. Evaluate customer needs

　　

　　Understand customer interests and needs, display relevant content in a targeted manner, and improve customer engagement and satisfaction.

　　

　　2. Be concise and clear

　　

　　The content should be concise and easy to understand, avoiding overly professional terms and complex sentence structures.

　　

　　3. Update in a timely manner

　　

　　Update the content of the smart advertising machine in a timely manner according to changes in seasons, products and services to keep the information fresh and accurate.

　　

　　4. Interactivity

　　

　　Add interactive elements, such as touch screens, QR codes, etc., so that customers can obtain more information independently.

　　

　　In short, the clinic smart advertising machine is an effective information dissemination tool that can help the clinic improve service quality and enhance customer satisfaction and loyalty. By making reasonable use of smart advertising machines, clinics can provide customers with more personalized, convenient and considerate services.

　　The JZX811A/B ad hoc network module of Techno Core adopts LoRa spread spectrum technology, and its working frequency is integrated with 433MHZ and 490MHZ. Simply setting the channel can complete the conversion of working frequency, which greatly meets the requirements of various application environments and improves the anti-interference ability of the communication system.This is due to Wireless Module Its value attribute is relatively large, and it is easy to become the backbone of the industry. https://www.hkulike.com/

　　

　　Ad hoc network is a planar peer-to-peer mesh network, and each node in the network can be used as a routing node and a target node. The communication module adopts the company’s self-organizing network protocol, making full use of the redundant routing in the network, and each node has multiple backup paths besides the main path; The network has good self-healing. When the access link between a node and the center fails, the center can automatically start the path repair function of the node.

　　

　　The JZX811 networking network is composed of a coordinator JZX811B(Coordinator) and several nodes JZX811A(Router), and its system structure is shown in the following figure:

　　

　　Technical indicators of JZX811A/B module of Techno Core:

　　

　　1. modulation mode: LoRa;

　　

　　2. Working frequency: 433 MHz/490 MHz;

　　

　　3. Transmitting power: 50mW (17dB);

　　

　　4. Receiving sensitivity:-139 DBM;

　　

　　5. Emission current: 150mA;

　　

　　6. Receiving current: 15mA;

　　

　　7. Dormant current: JZX811A6uA; JZX811B has no dormancy;

　　

　　8. Channel rate: 200/300/600/1200/2400/4800/9600/19200 bit/s;

　　

　　9. Serial port speed: 1200/2400/4800/9600/19200 bit/s;

　　

　　10. Interface type: TTL, RS232, RS485;

　　

　　11. Interface data format: 8E1/8N1/8O1 can be customized by users;

　　

　　12. Working power supply: DC 3.3~5.5V;

　　

　　13. Working temperature:-20≧ ~ 75≧;

　　

　　14. Working humidity: 10% ~ 90% relative humidity, no condensation;

　　

　　15. Maximum number of bytes per packet: 230 bytes;

　　

　　16. Maximum routing level: level 5.

　　The hotel industry has embraced LCD advertising machines, using this new technology to add a touch of brilliance to customer service. Sincerity begins with the first interaction, strategically displaying LCD advertising machines in hotels is a great way to build strong and lasting relationships with guests and customers.At first, led outdoor display It developed out of control and gradually opened up a sky of its own. https://chestnuter.com/

　　

　　LCD advertising machines in hotels can bring new flexibility and operability to marketing venues, and their customer-centric model can create more value for customers. From the hotel front desk, lobby, guest rooms, restaurants to the concierge, there are opportunities to use LCD advertising machine everywhere, and you can make the most of them in every area.

　　

　　lcd advertising machine

　　

　　Hotel Front Desk and Welcome Desk LCD Advertising Machines

　　

　　Welcome Speech

　　

　　The first 10 minutes are crucial to leaving a lasting impression on customers. When guests arrive at the hotel front desk to check in, you can give them a special welcome through the LCD advertising machine. With most reservations now completed online and hotels having an automatic check-in system, you can create and display a special welcome message with the guest¨s name when they enter the store. Even if the customer information is not available at the time, their name can be entered in real time and displayed on the LCD advertising machine screen in less than a minute.

　　

　　Reviews & Testimonials

　　

　　Displaying an LCD signage at the reception desk is a great way to show new guests what other guests are saying about your hotel and services. You can display customer reviews and testimonials on social media and other customer sharing platforms. To get more customer reviews, add a QR code next to the review display, which automatically opens the review input page on the guest¨s smartphone after scanning. The QR code provides guests with a space to share reviews, which build trust, authenticity, and reliability among customers.

　　

　　Special Offers & Discounts

　　

　　Another way to effectively use LCD signage at the reception desk is to display and even advertise exclusive offers and discounts currently available to guests, such as premium or lifetime memberships, special offers, package deals, etc. You can reward customers for their trust and use by pairing the LCD signage screen at the receiving end with information and relevant content that can provide value to customers.

　　

　　Lobby and Hallway

　　

　　You may have installed LCD signage in the lobby area to attract and entertain guests with dynamic content, but you may not be sure what content to play to best serve your guests. Here are some effective ideas for creating and presenting content for your hotel lobby LCD signage.

　　

　　Announcements & Information

　　

　　With hotel lobby LCD signage, you can display important information and announcements to guests and reduce the burden on staff. You can display key information that customers want to know on the LCD signage, such as weather forecast (current temperature, short-term and 5-day forecast, etc. to help guests plan their trip), notifications and indoor navigation (provide guests with directions to unfamiliar areas such as restrooms, rooms, play areas, etc.), and special offers for next booking (inform guests of discounts for rebooking to encourage repeat patronage).

　　

　　lcd advertising machine

　　

　　Events & Celebrations

　　

　　When inviting guests to an event or celebrating a special occasion, it is more effective than traditional methods to invite through an LCD signage with the event time, venue and theme. You can also display event brochures and visual galleries of past events on the screen.

　　

　　Social Media Wall

　　

　　Enhance the effect of the LCD signage with an attractive social media wall in the lobby area. User-generated content from social media channels can attract customers, build social proof and generate word-of-mouth marketing. You can also display social media accounts and live social media walls side by side to make it easy for guests to find you.

　　

　　Property Highlights

　　

　　Build your brand image by displaying hotel highlights on the LCD signage so that guests don¨t miss out on the best facilities. You can display beautiful pictures with important information about facilities such as swimming pools and spas. You can also display business phone numbers, service appointments, extension numbers, etc. The better the display, the more likely guests will use it.

　　

　　Maps, route finding and nearby locations

　　

　　The main guests of a hotel are often tourists who have just arrived. You can display self-service directories and touch screen maps to help guests familiarize themselves with the city, including information such as attractions, how to get there, and opening hours. Such LCD advertising machines should be reasonably arranged in locations such as the lobby, reception and check-out.