Shenzhen LCS Compliance Testing Laboratory Ltd 粤ICP备17001856号 Powered by：300.cn
Open "international market" for your wireless IoT communication products
Before the wireless communication product is put on the market, the manufacturer needs to confirm that the product meets the corresponding national, regional or international technical specifications. , GSM, WCDMA, CDMA, LTE, 5GNR, PPT and other fields have accumulated rich experience in engineering response, providing customers with services related to wireless communication products at home and abroad.
Established EMC full anechoic chamber and EMS/EMI laboratory.
Equipped with 2G/3G/4G/5G RF laboratory, short-range wireless laboratory, SAR test system, and Bluetooth BQB laboratory.
Has a team of engineers with more than ten years of experience in product testing, research and development of Bluetooth, RF, EMC, SAR and other products.
It was rated as a national high-tech enterprise and an AAA enterprise with corporate reputation.
Obtained the dual accreditation laboratory of China National Accreditation Service for Conformity Assessment CNAS and Metrology Accreditation CMA.
It has been recognized and authorized by international organizations such as FCC, TIMCO, MICOM, SIEMIC, CETECOM, NVLAP(LAB CODE 600112-0), Canadian IC, German TUV, EMCc, PHOENIX, etc. in the United States.
It has been recognized and authorized by international institutions such as INTERTEK in the UK, CCC, SRRC in China, NEMKO in Norway, MIC/TELEC in Japan and the Bluetooth SIG Alliance.
Several commonly used wireless Internet of things
Zigbee proprietary, short range, low cost and secure
Similar to Bluetooth, Zigbee is a low-power, low-data-rate, close-proximity self-organizing wireless network that supports mesh network topology. Work within a range of 100 meters. A Zigbee mesh network can contain up to 65,000 devices, which is twice what Bluetooth LE can support. Zigbee was conceived in 1998, standardized in 2003, and revised in 2006. The name of Zigbee comes from the swing dance of the bee, and its trademark is owned by the Zigbee Alliance, which is responsible for maintaining and publishing the Zigbee standard. According to its website information, there are hundreds of millions of devices using Zigbee technology around the world. Zigbee is very popular with IoT device manufacturers, it provides most of the basic functions that users need (connectivity, range, security), and as an open industry standard, it allows interoperability with any Zigbee certified device. The biggest complaints from OEMs are the cost of joining the consortium, certification and the lack of an open GPL license, since OEMs must be a member of the consortium to use its technology. Zigbee is primarily used in home automation applications such as smart lighting, smart thermostats and home energy monitoring. It is also commonly used in industrial automation, smart instrumentation and security systems.
Z-Wave short distance, low cost, high reliability
Similar to ZigBee, Z-Wave is a radio frequency-based, low-cost, low-power, highly reliable, short-range wireless communication technology suitable for networks. The structure of Z-Wave is a source-routed mesh network, i.e. all devices are connected to a central hub, usually a router or gateway. The network itself consists of three layers that work together to ensure that all devices are able to communicate at the same time. The radio layer defines how signals are exchanged between the network and the radio hardware, while the network layer determines how to control the data exchanged between nodes and devices. Additionally, the application layer assigns messages to specific applications in order to accomplish tasks like turning on the lights. The working frequency band of Z-Wave is 908.42MHz (US) ~ 868.42MHz (Europe), using FSK (BFSK/GFSK) modulation, the data transmission rate is 9.6kbps, the effective coverage of the signal is 30m indoors, and can exceed 100m outdoors. , suitable for narrow broadband applications. Z-Wave technology is designed for residential, lighting commercial control and status reading applications such as meter reading, lighting and appliance control, HVAC, access control, burglar and fire detection, and more. Z-Wave transforms any stand-alone device into an intelligent networked device, enabling control and wireless monitoring. When Z-Wave technology was originally designed, it was positioned in the field of smart home wireless control. Using small data format transmission, the transmission rate of 40kb/s is sufficient. Compared with other wireless technologies of the same kind, it has a relatively low transmission frequency, a relatively long transmission distance and a certain price advantage.
LoRa Proprietary, Remote, Cheap and Secure
Similar to Zigbee, LoRaWan is a proprietary technology defined and controlled by the non-profit LoRa Alliance. The main difference is that while Zigbee is a short-range IoT protocol designed to tightly connect multiple devices together, LoRa focuses on wide area networks. LoRa is especially suitable for long-distance communication. Compared with other communication methods, its modulation method greatly increases the communication distance, and can be widely used in the field of long-distance low-rate IoT wireless communication in various occasions. Such as automatic meter reading, building automation equipment, wireless security systems, industrial monitoring and control. It has the characteristics of small size, low power consumption, long transmission distance, strong anti-interference ability, etc. The antenna gain can be adjusted according to the actual application. The LoRaWAN network architecture is a typical star topology. In this network architecture, the LoRa gateway is a transparent relay that connects terminal devices and servers. The gateway and the server are connected through standard IP, and the terminal device uses a single hop to communicate with one or more gateways, and all nodes communicate in both directions. The LoRa gateway and the modules are networked in a star network, and the LoRa modules can theoretically be networked in a point-to-point polling manner, but the point-to-point polling efficiency is much lower than that of the star network. The gateway can realize multi-channel parallel reception and process multi-channel signals at the same time, which greatly increases the network capacity. The LoRa network is formed, but with the increase of LoRa devices and network deployment, there will be certain spectrum interference between them.
LTE-M cellular technology
LTE-M is a cellular technology specially designed to meet the needs of Internet of Things or machine-to-machine communication applications. LTE-M is a wireless system for mobile telecommunication operators and is supported by industry associations GSMA and 3GPP standards organizations. One of the main advantages of LTE-M is the potential for global connectivity, and it is the only system suitable for tracking moving objects over long periods of time. "The technology improves indoor and outdoor coverage, supports a large number of low-throughput devices, low latency sensitivity, ultra-low device cost, low device power consumption network architectures," said the GSMA. Since LTE-M works over cellular networks , and thus can be used to monitor, control and receive information from IoT devices in vehicles such as trucks, trains, boats, etc. When the LTE network is unavailable, the system can fall back to WCDMA (3G) or
GPRS/EDGE(2G) to keep connected. LTE-M also provides location-based services based on cellular base station positioning without the use of satellite-based systems such as GPS or Galileo. This feature provides significant cost savings for OEMs who need to equip their devices with a basic positioning system. However, the biggest advantage of LTE-M is security. Cellular-connected devices need to be loaded with a SIM chip, which can be embedded in a circuit board and pre-configured, keyed and signed at the factory. Once the SIM card is configured with embedded keys, these keys cannot be modified without physical access to the device. SIM is a security module that provides NSASuite BAES-256 encryption and authentication. Another advantage of LTE-M is the ability to stay connected even during power outages. Since it's connected to a cellular network, it doesn't need an access point (AP), and it can stay connected as long as the IoT device's battery is functioning properly. This is why cellular-based IoT connectivity is widely used in critical applications such as grid, home, office security and fleet management. The only problem with LTE-M is the high cost. To use the system, a subscription to carrier service is required, and a SIM card is required in each connected device.
NB-IoT cellular technology
NB-IoT is built on a cellular network, only consumes about 180kHz of bandwidth, and can be directly deployed on a GSM network, UMTS network or LTE network to reduce deployment costs and achieve smooth upgrades. NB-IoT focuses on the low-power and wide-coverage IoT market, and is an emerging technology that can be widely used around the world. It has the characteristics of wide coverage, multiple connections, low speed, low cost, low power consumption, and excellent architecture. NB-IoT uses the license frequency band and can be deployed in three ways: in-band, guard band, or independent carrier to coexist with existing networks. NB-IoT has four major characteristics: first, wide coverage, which will provide improved indoor coverage. In the same frequency band, NB-IoT has a gain of 20dB over the existing network, which is equivalent to increasing the coverage area by 100 times; second, It has the ability to support connections. One sector of NB-IoT can support 100,000 connections, supporting low latency sensitivity, ultra-low equipment cost, low equipment power consumption and optimized network architecture; the third is lower power consumption, NB - The standby time of IoT terminal modules can be up to 10 years; the fourth is lower module cost, and enterprises expect a single connected module to be no more than $5.
White-Fi and HaLow low cost, extended range, but low security
Both IEEE802.11af (white-Fi and IEEE802.11ah (HaLow) use previously licensed spectrum and do not interfere with traditional Wi-Fi signals in the 2.4GHz and 5GHz bands, nor with 2G and 3G cellular networks. Part of the spectrum Shared with some LTE channels used in the US. White-Fi takes advantage of the digital dividend that was unleashed when broadcast TV moved to digital terrestrial TV and some UHF channels before that ceased operation. The use of the digital dividend spectrum is different in the US and Europe The stipulations that connected devices need to periodically look for an available frequency HaLow extends Wi-Fi to the 900MHz band, enabling the low-power connections required by applications such as sensors and wearables. Since this frequency is free for basic communications, So HaLow is the preferred Wi-Fi standard for IoT. The biggest problem with HaLow is that the unlicensed spectrum is not uniform worldwide: HaLow operates at 900MHz in the US, 850MHz in Europe, 700MHz in China, and even in many countries No operating spectrum. Neither technology is suitable for high-speed or high-capacity data transmission due to the nature of the low frequency band. However, they can be used to provide connectivity for a large number of deployed devices. HaLow can provide data rates as low as 150kbps. For Sub-1GHz connectivity is also critical for a new generation of low-power devices, which typically require years of battery life. For the billions of sensors and monitoring devices deployed in cities around the world, this type of battery Performance is essential. HaLow also provides some power saving features such as Target Wake Time (TWT) and Traffic Indication Graph (TIM) which enables IoT devices to communicate at selected intervals, thereby saving battery power. 2017 , IEE launched another Wi-Fi standard for the Internet of Things: 802.11ax (later officially renamed WiFi6). Compared with HaLow, 802.11ax has the advantage of using 2.4GHz and 5GH frequency bands, which is more suitable for local range Internet of Things. In terms of security issues, Wi-Fi lacks the protection of secure elements and hardware encryption provided by SIM cards on cellular networks. However, to deploy hundreds or thousands of wireless sensors over large areas, white-Fi and HaLow Can provide low-cost connectivity and good performance.
ZETA has wide coverage, low cost and low power consumption
ZETA is a protocol standard based on UNB Low Power X (LPWAN) technology. It has the characteristics of wide coverage, low service cost and low energy consumption. The connection requirements of complex environments can be widely used in scenarios such as things, industries, construction, agriculture, and smart cities. As a new generation of LPWAN technology, ZETA launched "LPWAN 2.0 Ubiquitous Internet of Things", aiming to realize lower cost, lower power consumption and smarter network through continuous technological evolution. ZETA is the world's first LPWAN technology that supports "Mesh Ad Hoc Network". It has the characteristics of automatic networking without configuration, breakpoint recovery, high robustness and stability, and can choose the best topology and communication scheduling strategy to reduce power consumption to The lowest, to achieve long-distance reliable transmission in the mixed environment, can save 70% of the Internet of Things network deployment cost. ZETA self-developed ultra-narrowband communication technology (Ultra-NarrowBand), the channel bandwidth is 0.6~4kHz, supports 100bps-50kbps transmission rate, and ensures 100% success rate of data uplink through complex network mechanism. With super anti-interference and high receiving sensitivity, the transmission channel can be found in the gap even in the environment with complex interference sources. With intelligent routing technology, it can support up to 4 hops, extending the network coverage to the corners that AP signals cannot reach. ZETA covers a distance of up to 15km, supports data collection of high-speed moving objects at 120km/h, and expands to support 20bps-100kbps.
UWB has high transmission rate, large space capacity, low cost and low power consumption
uwB (UltraWideband) ultra-wideband technology is a brand new technology. It does not require the use of carrier waves in traditional communication systems, but transmits data by sending and receiving extremely narrow pulses with nanoseconds or less, thus having a bandwidth on the order of GHz. The most basic working principle of UWB technology is to send and receive Gaussian single-cycle ultra-short-time pulses with strictly controlled pulse intervals. The ultra-short single-cycle pulse determines the bandwidth of the signal is very wide. Converting the pulse sequence into a baseband signal eliminates the need for an intermediate frequency stage in traditional communication equipment, greatly reducing equipment complexity. UWB technology uses pulse position modulation PPM single-cycle pulse to carry information and channel coding. Generally, the working pulse width is 0.1-1.5ns (1 nanosecond = one billionth of a second), and the repetition period is 25-1000ns. UWB technology has a complex system. It has the advantages of low intensity, low power spectral density of transmitted signals, insensitivity to channel fading, low interception capability, and high positioning accuracy. It is suitable for high-speed wireless access in dense multipath places such as indoors.