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LPWAN
A low-power wide-area network (LPWAN or LPWA network) is a type of wireless telecommunication wide area network designed to allow long-range communications at a low bit rate among things (connected objects), such as sensors operated on a battery. The low power, low bit rate, and intended use distinguish this type of network from a wireless WAN that is designed to connect users or businesses, and carry more data, using more power. The LPWAN data rate ranges from 0.3 kbit/s to 50 kbit/s per channel. A LPWAN may be used to create a private wireless sensor network, but may also be a service or infrastructure offered by a third party, allowing the owners of sensors to deploy them in the field without investing in gateway technology. Attributes # Long range: The operating range of LPWAN technology varies from a few kilometers in urban areas to over 10 km in rural settings. It can also enable effective data communication in previously infeasible indoor and underground locations. # ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weightless (wireless Communications)
Weightless was a set of low-power wide-area network (LPWAN) wireless technology specifications for exchanging data between a base station and thousands of machines around it. History An event was held at the Moller Centre in Cambridge, UK by Cambridge Wireless on September 30, 2011. Presentations were given by Neul, Landis+Gyr, Cable & Wireless, and ARM Holdings. The technology was promoted by the Weightless Special Interest Group (SIG), announced on December 7, 2012. The group was led by William Webb, a professor at Cambridge and a founder of the company Neul. Another event was held in September 2013, when version 1.0 was published. The name Weightless was chosen to reflect the low overhead per transmission for devices that need to communicate just a few bytes of data. The Weightless logo appears as uppercase letters with the 'W' appearing in the top-right corner of a light blue box that has a solid blue line above it. In September 2014, Cambridge-based Neul was acquired by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weightless (wireless Communications)
Weightless was a set of low-power wide-area network (LPWAN) wireless technology specifications for exchanging data between a base station and thousands of machines around it. History An event was held at the Moller Centre in Cambridge, UK by Cambridge Wireless on September 30, 2011. Presentations were given by Neul, Landis+Gyr, Cable & Wireless, and ARM Holdings. The technology was promoted by the Weightless Special Interest Group (SIG), announced on December 7, 2012. The group was led by William Webb, a professor at Cambridge and a founder of the company Neul. Another event was held in September 2013, when version 1.0 was published. The name Weightless was chosen to reflect the low overhead per transmission for devices that need to communicate just a few bytes of data. The Weightless logo appears as uppercase letters with the 'W' appearing in the top-right corner of a light blue box that has a solid blue line above it. In September 2014, Cambridge-based Neul was acquired by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony
, commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional electronic products, the largest video game console company and the largest video game publisher. Through Sony Entertainment Inc, it is one of the largest music companies (largest music publisher and second largest record label) and the third largest film studio, making it one of the most comprehensive media companies. It is the largest technology and media conglomerate in Japan. It is also recognized as the most cash-rich Japanese company, with net cash reserves of ¥2 trillion. Sony, with its 55 percent market share in the image sensor market, is the largest manufacturer of image sensors, the second largest camera manufacturer, and is among the semiconductor sales leaders. It is the world's largest player in the premium TV market for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct-sequence Spread Spectrum
In telecommunications, direct-sequence spread spectrum (DSSS) is a spread-spectrum modulation technique primarily used to reduce overall signal interference. The direct-sequence modulation makes the transmitted signal wider in bandwidth than the information bandwidth. After the despreading or removal of the direct-sequence modulation in the receiver, the information bandwidth is restored, while the unintentional and intentional interference is substantially reduced. The first known scheme for this technique was introduced by a Swiss inventor, Gustav Guanella. With DSSS, the message bits are modulated by a pseudorandom bit sequence known as a spreading sequence. Each spreading-sequence bit, which is known as a chip, has a much shorter duration (larger bandwidth) than the original message bits. The modulation of the message bits scrambles and spreads the pieces of data, and thereby results in a bandwidth size nearly identical to that of the spreading sequence. The smaller the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CDMA
Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth). To permit this without undue interference between the users, CDMA employs spread spectrum technology and a special coding scheme (where each transmitter is assigned a code). CDMA optimizes the use of available bandwidth as it transmits over the entire frequency range and does not limit the user's frequency range. It is used as the access method in many mobile phone standards. IS-95, also called "cdmaOne", and its 3G evolution CDMA2000, are often simply referred to as "CDMA", but UMTS, the 3G standard used by GSM carriers, also uses "wideband CDMA", or W-CDMA, as well as TD-CDMA and TD-SCDMA, as its radio technologies. It can be also used as a channel or m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ingenu
Ingenu, formerly known as On-Ramp Wireless, is a provider of wireless networks. The company focuses on machine to machine (M2M) communication by enabling devices to become Internet of Things (IoT) devices. History Ingenu was founded in 2008 as On-Ramp Wireless; by the end of 2014, it was valued at $72 million according to data from PitchBook. On September 1, 2010, the World Economic Forum announced the company as a Technology Pioneer for 2011. On April 4, 2011, Bloomberg announced the company as a 2011 New Energy Pioneer. The company was renamed to Ingenu in September 2015. Initially the company focused on utilities, but in 2012 expanded to the gas and oil industries. The Ingenu brand launch in September 2015 coincided with the announcement of a network dedicated to machine connectivity. Technology Using the free 2.4 GHz ISM bands, Ingenu’s hardware has been tested at over a 30-mile range in the 2.4 GHz free ISM band while maintaining low power operation. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cellular Network
A cellular network or mobile network is a communication network where the link to and from end nodes is wireless. The network is distributed over land areas called "cells", each served by at least one fixed-location transceiver (typically three cell sites or base transceiver stations). These base stations provide the cell with the network coverage which can be used for transmission of voice, data, and other types of content. A cell typically uses a different set of frequencies from neighboring cells, to avoid interference and provide guaranteed service quality within each cell. When joined together, these cells provide radio coverage over a wide geographic area. This enables numerous portable transceivers (e.g., mobile phones, tablets and laptops equipped with mobile broadband modems, pagers, etc.) to communicate with each other and with fixed transceivers and telephones anywhere in the network, via base stations, even if some of the transceivers are moving through more than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NarrowBand IOT
Narrowband Internet of things (NB-IoT) is a low-power wide-area network (LPWAN) radio technology standard developed by 3GPP for cellular devices and services. The specification was frozen in 3GPP Release 13 (LTE Advanced Pro), in June 2016. Other 3GPP IoT technologies include eMTC (enhanced Machine-Type Communication) and EC-GSM-IoT. NB-IoT focuses specifically on indoor coverage, low cost, long battery life, and high connection density. NB-IoT uses a subset of the LTE standard, but limits the bandwidth to a single narrow-band of 200kHz. It uses OFDM modulation for downlink communication and SC-FDMA for uplink communications. IoT applications which require more frequent communications will be better served by NB-IoT, which has no duty cycle limitations operating on the licensed spectrum. In March 2019, the Global Mobile Suppliers Association (GSA) announced that over 100 operators had either NB-IoT or LTE-M networks. This number had risen to 142 deployed/launched networks by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MySensors
MySensors is a free and open source DIY ( do-it yourself) software framework for wireless IoT (Internet of Things) devices allowing devices to communicate using radio transmitters. The library was originally developed for the Arduino platform. The MySensors devices create a virtual radio network of nodes that automatically forms a self healing mesh like structure. Each node can relay messages for other nodes to cover greater distances using simple short range transceivers. Each node can have several sensors or actuators attached and can interact with other nodes in the network. The radio network can consist of up to 254 nodes where one node can act as a gateway to the internet or a home automation controller. The controller adds functionality to the radio network such as id assignment and time awareness. Supported hardware platforms The framework can natively be run on the following platforms and micro controllers. * Linux / Raspberry Pi * ATMega 328P * ESP8266 * ESP32 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LTE (telecommunication)
In telecommunications, long-term evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA standards. It improves on those standards' capacity and speed by using a different radio interface and core network improvements. LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. Because LTE frequencies and bands differ from country to country, only multi-band phones can use LTE in all countries where it is supported. The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9. LTE is also called 3.95G and has been marketed as "4G LTE" and "Advanced 4G"; but it does not meet the technical criteria of a 4G wireless service, as specified in the 3GPP Release 8 and 9 document series for LTE Advanced. The requirements were set forth by the ITU-R organisation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LTE-M
LTE-M or LTE-MTC (" Long-Term Evolution Machine Type Communication"), is a type of low-power wide-area network radio communication technology standard developed by 3GPP for machine-to-machine and Internet of Things (IoT) applications. LTE-M includes eMTC ("enhanced Machine Type Communication"), also known as LTE Cat-M1, whose specification was frozen in 3GPP Release 13 (LTE Advanced Pro), in June 2016. Competing 3GPP IoT technologies include NB-IoT and EC-GSM-IoT. The advantage of LTE-M over NB-IoT is its comparatively higher data rate, mobility, and voice over the network, but it requires more bandwidth, is more costly, and cannot be put into guard band portion of the frequency band for now. Compared to LTE Release 12 Cat-0 modem, an LTE-M model is claimed to be 80% less expensive (in terms of the bill of materials), support up to 18 dB better coverage, and a battery lifetime that can last up to several years. In March 2019, the Global Mobile Suppliers Association reported ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
