A brief discussion on LoRa Internet of Things technology and its development status
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We are now in the era of the Internet of Things, and physical network technology is developing rapidly. With the rapid development of the Internet of Things, wireless communication technology also needs to develop step by step. Nowadays, many low-power wide area networks (LPWANs) designed for Internet of Things applications have emerged, which have low bandwidth, low energy consumption, long distance, and can achieve a large number of connections. Among them, LoRa technology stands out and is recognized by the Internet of Things community.
In August 2013, Semtech officially released a new type of chip using ultra-long-range, low-power data transmission technology below 1GHz (Long Range, LoRa for short) to the industry. Its receiving sensitivity reached an astonishing -148dbm, which is more than 20db higher than other advanced sub-GHz chips in the industry, thus ensuring the reliability of network connection.
It uses linear frequency modulation spread spectrum modulation technology, which maintains the same low power consumption characteristics as FSK (frequency shift keying) modulation, and significantly increases the communication distance, while improving network efficiency and eliminating interference. That is, terminals with different spread spectrum sequences will not interfere with each other even if they use the same frequency to send at the same time. Therefore, the concentrator/gateway developed on this basis can receive and process data from multiple nodes in parallel, greatly expanding the system capacity.
Linear spread spectrum has been used for decades in military and space communications because it can achieve long communication distances and robustness to interference, and LoRa is the first low-cost implementation for commercial use. With the introduction of LoRa, the landscape of embedded wireless communications has changed radically. This technology changes the previous trade-offs between transmission distance and power consumption, providing a simple communication system that can achieve long distances, long battery life, high capacity, and low cost.
LoRa mainly operates in the global free frequency bands (i.e. unlicensed frequency bands), including 433, 868, 915 MHz, etc. The LoRa network mainly consists of four parts: terminal (with built-in LoRa module), gateway (or base station), server and cloud, and application data can be transmitted bidirectionally.
As the most promising low-power wide-area communication technology, LoRa has been used in all walks of life. LoRa uses linear frequency modulation spread spectrum modulation technology, which significantly increases the communication distance and network efficiency while maintaining low power consumption, and eliminates interference, so that even if the same frequency is used for simultaneous transmission, there will be no mutual interference. The gateway developed based on LoRa can receive and process data from multiple nodes in parallel, expanding the system capacity.
LoRa data transmission terminal IOT-L2S-B is a general communication interaction device designed and manufactured by Heyuan Intelligent based on the LoRa radio frequency chip after years of professional research and production of power meters. The product integrates two industrial standard RS485s, transmits the data that the wired device needs to transmit to the device through the RS485 communication line, and then transmits the data wirelessly, supports multiple protocols, and realizes data transmission between wired devices and wireless devices. This product can be widely used in the Internet of Things, centralized meter reading, industrial control and other fields.
LoRa has been widely used in various IoT industries due to its low cost, wide distribution, strong durability and mature technology. Its excellent performance and flexible networking form are increasingly used in various industries, and its prospects are broad. LoRa data transmission terminal IOT-L2S-B is a general communication interaction device designed and manufactured based on LoRa radio frequency chips. It can be widely used in IoT, centralized meter reading, industrial control and other directions. However, its QoS is not high and the data transmission volume is small. In order to save costs, connect a large number of connections, and do not require high QoS, LoRa is undoubtedly the best choice. The existence of delay characteristics makes it organically complementary to NB-IoT in some industries.
Development Status
The LoRa Alliance, a global corporate association supporting the open standard LoRaWAN for low-power wide-area networks for the Internet of Things, and 16 alliance members held a centralized display at the LoRa Alliance booth. As an open, non-profit organization, the LoRa Alliance has become one of the largest and fastest-growing alliances in the technology field since its establishment in 2015. Alliance members work closely together and share experiences to promote LoRaWAN to become the leading open global standard for secure, operator-grade LPWAN connections for the Internet of Things. With its technical flexibility to address a wide range of IoT applications, including static and mobile devices, and certification programs to ensure interoperability, the LoRaWAN protocol has been deployed by major mobile network operators around the world, is available for connection in more than 100 countries, and is still expanding.
Currently, there are 83 operators (LoRa), and the LoRa network covers more than one hundred countries in the world. Among them, there are telecom operators, network operators and private independent organizations that use the network privately. The network has covered the United States, Canada, Brazil, China, Russia, India, Malaysia, Singapore and other regions. In China, we see major vertical markets such as smart cities, smart homes, smart agriculture, and LoRa fire intelligent technology. Many vertical solutions have been put on the market to provide customers.
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