Do things networking wireless development, do not know how these kinds of technology contrast line?
Internet of Things and objects are connected. The rapid development of wireless technologies provides technical support for the exchange of information between objects. In the popularization of Internet of Things, wireless technologies will play an increasingly important role. In this paper, several common LPWAN wireless communication technologies (NB-IoT / eMTC / LoRa) comparison to explore the general trend of the Internet of things under the general characteristics and application scenarios. NB-IoT NB-IOT stands for Narrow Band-Internet of Things, Narrowband Internet of Things, NB-IOT belongs to the category of Internet of things. Is Huawei-led and has become the 3GPP standard LPWA technology. Based on the existing cellular network technology, NB-IOT can rapidly support the market demand of the industry by upgrading the existing network, becoming the fourth mode on the GUL network. At the same time, NB-IOT also has a wide coverage (can be covered underground), long battery life (more than ten years), low cost (less than $ 5 per module), large capacity (single cell can support 100,000 connections) . Do things networking wireless development, do not know how these kinds of technology contrast line? Technical advantages NB-IoT has four major characteristics: Broad coverage will provide improved indoor coverage, in the same frequency band, NB-IoT than the existing network gain of 20dB, equivalent to an increase of 100 times the coverage area; The second is the ability to support massive connections, NB-IoT a sector can support 100,000 connections, support for low latency sensitivity, low device cost, low device power consumption and optimized network architecture; Do things networking wireless development, do not know how these kinds of technology contrast line? Third, lower power consumption, NB-IoT terminal module standby time up to 10 years; Fourth, lower module costs, the company expects a single connector module does not exceed 5 US dollars. Focusing on the LPWA IoT market, NB-IOT is an emerging technology that is widely deployed worldwide. It has a wide coverage, more connections, low rate, low cost, low power consumption, superior architecture features. NB-IOT uses the license band, which can be deployed in-band, guard band, or independent carrier to coexist with existing networks. Do things networking wireless development, do not know how these kinds of technology contrast line? Application scenario NB-IOT is most commonly used in three typical application scenarios such as smart meters, smart parking, and pet smart tracking. In NB-IOT's post-planning, intelligent bikes, smart smoke detectors, smart trash bins, smart roads, Smart vending machines and so on. The challenge First, interoperability and consistency issues. In 2015, key members of NB-IoT, including Vodafone, Ericsson, Telefonica and GSMA conducted a simple interoperability and compliance certification test for NB-IoT devices. Vodafone has also set up a dedicated NB-IoT lab in Newbury, UK and will continue its further laboratory studies in Dusseldorf, Germany, in the second half of 2016. Second, deployment and long-term support. The biggest problem with NB-IoT deployments is time and cost. Up to 85% of enterprise base stations can support NB-IoT with only software upgrades. However, for outdated network operators, the hardware needs to be upgraded. This will result in increased costs and time consuming NB-IoT network construction. Another problem is global M2M roaming. In theory, operators need to support three standards: CAT-M, EC-GSM, NB-IoT, and GPRS. Third, application and business model. In order to establish NB-IoT applications and business models, the mobile communications industry needs to establish a partner ecosystem as soon as possible. For example, Deutsche Telekom has set up NB-IoT prototype hubs in Kraków, Berlin and Poland. These hubs are incorporated into incubators to provide developers with a fast-learning environment that inspires new business models and shortens time to market . Fourth, competition with LPWAN (Low Power Wide Area Internet of Things) technology. LoRa and Sigfox have proven to be important developmental technologies, with Sigfox in use in 24 countries and LoRa continuing to be used in some countries, private networks and community networks. As NB-IoT will not be deployed in the near-term, other technology competitors still have the opportunity to determine their market position. Do things networking wireless development, do not know how these kinds of technology contrast line? At present, NB-IoT's market penetration varies from country to country. In many countries, potential operators may face strong competition from non-mobile LPWAN networks. For example, in the Netherlands, KPN has established a national LoRa network, in which case it may not be able to adopt NB-IoT. Fifth, to determine the correct market entry strategy. The application of LPWAN has the feature of sending small data payloads in non-regular intervals. Potential users may need more low-value services. In this case, NB-IoT operators need to develop strategies to deal with such market demand. Key strategies include: building a balance between markets and brands; expanding market share beyond the traditional M2M business; avoiding cost-price wars in low-end markets, focusing on applications that control price premiums; exploring new business models to create value, Strengthen vertical industry cooperation. Sixth, the design of pricing plans is mainly the Internet of Things data plan. At present, operators are still trying. For example, KT recently launched its nationwide LoRa network and introduced six data plans, each corresponding to data applications using different frequency bands. Its pricing model is: LoRa data plan price is only equivalent to one-tenth of the business of the Internet-based LTE. In countries with LoRa or Sigfox businesses, NB-IoT rates have had to maintain a reasonable range of competition. In the UK, NB-IoT operators have more room to maneuver when designing their pricing structure because there is no national LPWAN network. In addition, low-speed data transmission, privacy and security, IT system conversion time and other issues, will limit its development. eMTC LTE-M, that is, LTE-Machine-to-Machine, is an Internet of Things technology based on LTE evolution, Low-Cost MTC in R12 and LTE enhanced MTC in R13, that is, eMTC. LTE carrier to meet the needs of IoT devices. The eMTC is based on a cellular network and supports peak rates up to 1 Mbps upstream and downstream. The eMTC belongs to the Internet of Things (IoT) rate. Its user equipment can directly access the existing LTE network by supporting 1.4 MHz radio frequency and baseband bandwidth. Do things networking wireless development, do not know how these kinds of technology contrast line? Technical advantages Narrowband LTE one of the most important features. First, the complexity of the system has been greatly reduced, the complexity and cost have been greatly optimized. Second, the power consumption is extremely reduced, battery life increased significantly. Third, the network's coverage is greatly enhanced. Fourth, the density of network coverage is enhanced. eMTC possesses the basic capabilities of LPWA. The first is broad coverage. In the same frequency band, eMTC has a gain of 15dB over existing networks, which greatly enhances the LTE network's deep coverage capability. The second is the ability to support massive connections. eMTC One sector can support nearly 100,000 connections; Third, lower power consumption, eMTC terminal module standby time up to 10 years; Fourth, lower module costs, large-scale connection will bring the module chip costs The rapid decline, eMTC chip target cost at 1 to 2 dollars. Do things networking wireless development, do not know how these kinds of technology contrast line? Application scenario Application in intelligent logistics, with anti-theft, anti-swap, real-time temperature sensing and positioning advantages, real-time monitoring and positioning, the information recorded and uploaded, you can track the trajectory; in smart wearable devices, can support health monitoring , Video services, data return and positioning; relying on the current cellular interactive screen to provide applications including smart charging pile, waiting treasure, elevator guard, intelligent bus stop, public bicycle management. The challenge The typical difference between the eMTC and the NB-IoT is that the eMTC terminal can operate at a bandwidth of 1.08MHz, which is much higher than the 200kHz of an NB-IoT terminal. Therefore, the peak rate of the eMTC terminal is much higher than that of the NB-IoT terminal. Based on the above features, the industry generally believes that eMTC technology can provide a relatively low cost VoLTE terminal solution and can provide better service quality. However, eMTC technology may support e-business or provide voice solutions through detailed technical analysis, and the actual effect may be difficult optimism. Low power consumption features In order to be able to provide IoT services in a limited power supply environment, like the NB-IoT, eMTC also targets low power consumption as a system design goal in the hope of being able to support 10-year maintenance-free terminals based on a smaller capacity battery, -IoT uses the same eDRX (Extended Discontinuous Reception) and PSM (Power Saving Mode) two power-saving technology. 1.BT FMB Face Milling Arbors Cnc Milling Tool Holders , used in the clamping of the cutter with the radial drive groove, such as the face milling cutter, the vertical disc cutter, the set type end mill, high speed and high precision machining .Mechanical spindle and cutting tools and other accessories.High Precision BT shank Tool Holder ,balanced G6.3 or G2.5 For choose. Mill Holder,Face Milling Holder,Mta Milling Machine Cuck,Bt Fmb Face Mill Holder Shandong Chongde Precision Machinery Co.,LTD , https://www.springcollet.com
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