Hoe LPWAN-technologieën te definiëren?
LPWAN is er ééndraadloze telecommunicatie WAN dat is ontwikkeld om communicatie over lange afstanden met een lager bitpercentage mogelijk te maken. De meeste LPWAN-technologieën zijn in staat een netwerkdekking van enkele kilometers of zelfs tientallen kilometers te bereiken. Vanwege de brede netwerkdekking en het lage stroomverbruik van de terminals, het past beter bij de inzet van grootschalige projecten IoT-toepassingen.
Vergeleken met de traditionele Internet of Things-technologieën, LPWAN-technologieën bezitten onderscheidende sterke punten. De LPWAN-technologieën beschikken over langere afstanden, in tegenstelling tot andere draadloze verbindingstechnologieën zoals Bluetooth, Wifi, Zigbee En 802.15.4. Bovendien, Het bezit een verbinding met een lager energieverbruik in vergelijking met mobiele technologieën(zoals GPRS, 3G en 4G).
De werkingsprincipes van LPWAN
De Wize-technologie, die afkomstig is van de Europese norm EN-13757 Wireless M-bus, verwijst naar LPWAN-netwerktechnologie. Gedefinieerd door de Wize Alliance, De Wize-technologie verwijst naar één type Internet of Things-standaard, die zich vooral richt op toepassingen zoals draadloze meting, intelligente steden en industrieel IoT.
The Wize is actief in de 169 MHz-frequentieband, die functioneert als licentievrije frequentieband in Europa. Omdat het gebruik maakt van een laagfrequente band met lange golflengten en een sterk penetratievermogen van gebouwen en barrières, het padverlies is aanzienlijk verminderd, wat leidt tot een groter zendbereik van wel twintig kilometer. De Wize-overeenkomst is een tweerichtingsovereenkomst die de overdracht en ontvangst van informatie van maximaal mogelijk maakt 246 bytes en maakt het mogelijk om de firmware-update op afstand uit te voeren naar het netwerkapparaat. Vanwege de korte berichtoverdracht van de Wize, relevante apparaten hoeven slechts een paar minuten te worden ingeschakeld. En de levensduur van de batterij kan tot wel 20 jaren. Bovendien, Wize is eigenaar van de functies van end-to-end-codering, het hoogste veiligheidsniveau garanderen.
Welke draadloze technologieën zijn inbegrepen in LPWAN?? (vier draadloze technologieën)
De belangrijkste technische kenmerken van de Wize:
- Het bereik van de frequentieband varieert van 169.4 MH naar 169.475 MHz, met een volledige bandbreedte van 75 kHz.
- Radiospectrum is onderverdeeld in 6 kanalen (vijf uplink, één downlink), 12.5 kHz per kanaal.
- Biodirectionele communicatie van 256 bytes uplink evenals 256 bytes omlaag.
- Uitbreidbare gedebugde en gedemoduleerde functies, de software die de radio definieert (GFSK en 4GFSK).
- Communicatie tijd, servicecyclus voor tien procent, zes minuten per uur.
- Communicatiesnelheid varieert van 2400bps tot 6400bps.
- De communicatieafstand bedraagt maximaal 50 km of buitenshuis, tot tien km of meer binnenshuis, de dieptedekking van het binnenbereik van 2,5 km tot anderen.
- Beveiligingsversleuteling, AES128.
- Lagere dagelijkse communicatiecapaciteit (vijf tot tien keer), extreem lager stroomverbruik, en de kleine lithiumbatterijen kunnen meterafleesapparaten op afstand vijftien tot twintig jaar lang van stroom voorzien.
- Een overeenkomstmechanisme maakt de planning en uitvoering van de firmware-updates van de apparatuur mogelijk met een zendradio.
Is LoRa-technologie eigendom van LPWAN??
LoRa, dat nog steeds een van de LPWAN-netwerkcommunicatietechnologieën is, verwijst naar een uniek modulatieformaat gegenereerd door het RF-onderdeel van Semtech, gebaseerd op spectrumspreidingstechnologie voor draadloze ULR-transmissie, die wordt gebruikt en verbeterd door Semtech.
De kernchips van de LoRa Radio Frequency-sectie omvatten zowel de SX1276 als de SX1278. De integratie van chips is kleinschalig en zeer efficiënt, zodat de LoRa draadloze module een hoge ontvangstgevoeligheid krijgt.
De gatewaychip is uitgerust met SX1301, die meer geïntegreerd is en meer doorgangen heeft, en de LoRa-gateway gecombineerd met SX1301 als sleutel is in staat om een ingewikkeld IoT-zelforganiserend netwerk met meerdere knooppunten te creëren met veel LoRa-modules.
Is NB-IoT-technologie eigendom van LPWAN??
NB-IoT-technologie functioneert als een LPWA (Grootschalig netwerk met laag vermogen) oplossing met de volgende voordelen:
Enorme verbindingen: In dezelfde compound, NB-IoT kan 50 tot 100 keer meer toegang bieden dan de bestaande draadloze technologieën, dat is tot 100,000 verbindingen.
Ultralaag stroomverbruik: NB-IoT-apparaten verbruiken weinig stroom en kunnen een batterijduur van meer dan vijf jaar garanderen.
Diepe dekking: NB-IoT verbetert de winst van 20 dB ten opzichte van LTE en verbetert de dekkingscapaciteit met 100 keer, waardoor een diepe dekking mogelijk is van omgevingen die moeilijk te bereiken zijn met traditionele draadloze signalen.
Veiligheid en betrouwbaarheid: Het ondersteunt tweerichtingsauthenticatie en strikte codering van luchthavens om betrouwbare toegang op carrierniveau te bereiken.
Is LTE-M-technologie eigendom van LPWAN??
LTE-M, wat betekent Lange Termijn Evolutie Machinetype Communicatiecategorie M1, of LTE MTC Cat M1 en LTE-M, is een LPWAN-technologiestandaard aangekondigd door de 3GPP in Release 13 van de specificatie. LTE-M is een LPWAN-technologie die ondersteuning biedt voor IoT door de complexiteit van apparaten te verminderen en een uitgebreid gedekt bereik te bieden, terwijl hergebruik van de LTE-installatie-infrastructuur mogelijk wordt gemaakt. Batterijduur tot ruim tien jaar en de modemprijzen zijn verlaagd naar 20 naar 25% van het bestaande EGPRS-modem.
Is de Sigfox-technologie eigendom van LPWAN??
Sigfox is een ultra-smalband (UNB) technologie. De kenmerken van frequentiehoppen, frame repetition and multi-base station connectivity make it highly resistant to interference. Sigfox uses a radio access scheme that allows communication in any industrial, scientific, and medical (ISM) radio band. Bijvoorbeeld, the European region utilizes a wide 192 kHz spectrum at 868 MHz for deployment and ensures 100 Hz channel bandwidth for uplink communications. To realize extremely low power consumption, communication with the device is only possible for some short periods of time such as when the device turns on its receiver after sending a message.
Behoort WIFI-technologie tot LPWAN??
Wifi, also referred to as Wireless Fidelity, is a wireless fidelity technology. It is a technology that enables a terminal such as a PC and handheld equipment (bijv., PDAs and cell phones) to be interconnected to each other in a wireless manner.
Wi-Fi refers to a brand of a wireless network communication technique managed by the Wifi Alliance to enhance interconnectivity between the wireless networked items on the basis of the IEEE 802.11 standaard.
In the context of wireless LANs, it stands for “wireless compatibility certification”, which is crucially a commercial certification and a technology for wireless networking.
De sterke punten & drawbacks of LPWAN Technologieën
Some main strengths of LPWAN technology:
Long range, wide coverage up to tens of kilometers.
Lower power consumption, the battery life is able to be lasted for up to ten years.
Low data speed rate, small bandwidth consumption, low data capacity and low frequency of communication
Transmission delay is not sensitive, and the requirement for real-time data transmission is not high
Goedkoop, low cost of deployment due to large-scale requirements
Gateway or base station, large coverage area, the low number required for network infrastructure construction
As most of the technologies work in Sub-GHz bands, the network signal penetration is strong
De uitdagingen van LPWAN
The too-closed architecture of the traditional wide-area network makes it difficult to achieve multi-cloud interconnection.
In the following years, cloudiation is the development trend. A majority of enterprises will deploy their business to the cloud. In order to access cloud applications, enterprise WAN has to interconnect with public cloud, private cloud and SaaS cloud, and the closed traditional WAN architecture can hardly satisfy the interconnection requirements of multiple clouds. Bovendien, the migration of enterprise business to the cloud will inevitably make enterprise WAN carry more and more cloud-related application traffic, and traditional WAN networks can hardly support the surge of WAN traffic.
More and more flexible networking makes it difficult to achieve diversified interconnections
Globalization makes enterprises’ branches more and more widely distributed, and different branches have different requirements for networks. Bijvoorbeeld, some need multi-layer networks, some need flat networks, some need branch site networks with multiple uplinks(more than 5), and some need networks with multiple HUBs (more than 4). Facing such a complicated network, it is hard for traditional WAN networks to achieve flexible networking and meet the demand of diversified interconnection of enterprises.
The dramatically increased number of applications makes it hard to guarantee the application experience
In the time of cloud and digitalization, a large number of emerging enterprise businesses closely integrated with cloud computing are flourishing, and the number and types of enterprise applications are exploding, such as voice, video, file transfer, e-mail, and SaaS applications, enz. Different applications have different requirements on link quality. Traditional enterprise private lines cannot differentiate services. Bovendien, the newly added Internet network is not capable of ensuring the quality of services. Daarom, when there is sudden traffic congestion or link quality deterioration, the experience of critical services cannot be guaranteed.
Difficult network operation and maintenance make it easy to generate errors when the configuration is completed manually
Under the traditional model, the service turn-up requires networking engineers to go to the site for manual configuration. The network operation and maintenance as well as fault locating also require certain personnel to operate on site. Daarom, the efficiency of service turn-up and network operation and maintenance is low with high cost. In the tide of digitalization and globalization, the branches of enterprise WAN networks are more widely distributed, more numerous, and the services carried are more complex, and the operation and maintenance are more difficult. The traditional manual configuration and operation and maintenance methods can hardly satisfy the needs of rapid business development.
Waar wordt LPWAN voor gebruikt??
LPWAN technology can be applied to various industries, such as Smart Industries, Smart Utilities, Smart Cities, Smart Buildings, enz.
Smart Industry – including asset tracking, asset process automation, discrete automation, milieu Controle, industrial lighting, commercial security, infrastructure monitoring, water management and various other applications, en meer.
Smart utilities – including intelligent management of water, elektriciteit en gas, the most important part is smart metering.
Slimme stad – includes applications related to the management of municipal resources and services. Cases cover street lighting, waste control, parking lot management, environmental detection, traffic monitoring, emergency management and public transport control.
Smart Building – Smart buildings involve building automation, including applications related to HV or AC (verwarming, ventilatie, airconditioning), energy control, veiligheid, verlichting, and room automation.
Momenteel, LPWAN applications are mostly battery-powered applications. Due to its low communication frequency and small data volume, the battery can generally work for several years or even ten years. Bovendien, it can be powered by energy gathering including solar energy. LPWAN technology offers a new option for IoT scale application deployment, which will surely bring great advancement to IoT applications.
De oplossingen voor LPWAN Technologies
Product Change – From a product perspective, LPWAN-related products are no longer a single product but rather a systematic product. It includes sensing terminals, poorten (or base stations), network servers, and application service software.
Change of service – The change of product extends the scope and form of service.
Changes in operators – Cellular and non-cellular based LPWAN technologies have emerged. Cellular technologies, such as NB-IoT and LTE-M, no longer define narrowband IoT in terms of traffic charges for operators, but rather in terms of the number of connections. Bijvoorbeeld, the NB-loT tariff package introduced by Telecom is based on the “number of connections”, using a package model, which specifies a certain number of connections within the package, and charges separately for the number of connections beyond the package. The open standard LoRa non-cellular technology has given several companies more freedom to develop and operators based on LoRa network services have emerged.
The value of data – LPWAN technology enables large-scale connectivity of things, and data is transmitted to cloud servers, which brings new management methods to governments and enterprises based on data analysis and management.
Waar wordt LPWAN voor gebruikt??
Application of NB-IoT in Animal Husbandry
The livestock industry is primarily categorized into captive breeding and stock-breeding, with the north part and west part frontiers of China being the major grazing places.
The benefits of stock-breeding include high-quality of livestock meat and lower feed costs, but leading to a lot of inconveniences in livestock management.
Artificial grazing remains the most primitive and straightway. Echter, there are several shortcomings:
- 1. Artificial grazing requires a person to graze, which is a waste of manpower
- 2. Artificial grazing contains safety risks, and there is a risk of being injured by wild animals
- 3. Artificial stocking is not capable of systemic management
This issue can be handled by making use of GPS plus GPRS livestock locating system. Echter, the individual size of the cattle and sheep herd is huge, the capacity of the GPRS communication base station will be insufficient, and the battery life will be problematic. Bovendien, the farms are relatively remote, and the signal coverage strength will be problematic.
De Application of NB-IoT in meteruitlezing op afstand
Water and gas meters are closely associated with our daily lives and are applied to each family.
The most primitive approach is to manually read the meter statistics at home. With the fast growth of society, manual meter reading has given rise to a variety of shortcomings.
- 1. Low efficiency
- 2. High labor cost
- 3. Error-prone data recording
- 4. Owners are wary of strangers and cannot enter the door
- 5. Difficult to maintain and manage, enz.
GPRS remote meter reading emerged. It can cope with a lot of issues of manual meter reading, and is more well-developed, efficient and secure than the manual meter reading technology.
De Application of NB-IoT in manhole covers monitoring
De stad ondergaat een snelle bouw en de ondergrondse werken opgezet door gemeentelijke openbare infrastructuur nemen toe, dus de toename van putdeksels is onvermijdelijk.
Het putdeksel speelt een belangrijke rol. Bijvoorbeeld, als we de informatie over de status van putdeksels niet op tijd kunnen krijgen, het zal mogelijk een groot verlies aan mensenlevens en eigendommen veroorzaken.
Momenteel, de meeste steden worden gecontroleerd en geïnspecteerd door middel van handmatige controle. Echter, vanwege het enorme aantal putdeksels, en de lage efficiëntie van handmatige inspectie, Het is vaak onmogelijk om de statusinformatie van putdeksels tijdig en accuraat te verkrijgen, wat tot allerlei veiligheidsrisico's leidt.
Met de populariteit van de slimme woning industrie in de afgelopen jaren, ook de benuttingsgraad van het slimme slot in het dagelijks leven neemt toe.
Momenteel, the smart lock utilizes a non-mechanical key as the technology of user identification ID.
Mainstream technologies are proximity card, fingerprint identification, password identification, facial recognition and so on, which substantially enhances the security of access monitoring.
But the precondition of the above safety is the state of power. If a smart lock is in a power failure situation, then the smart lock is virtually not useable.
In order to enhance security, the smart lock needs to have a built-in battery to collect basic data, and then transfer the data to the servers If there is abnormal data collected, it automatically issues a warning to the users.
As it is difficult to disassemble after the installation of a smart lock, the battery life of a smart lock is required to be long enough.
Since the door location is in a closed building, then stronger signal coverage is required to ensure real-time network data transmission.
The number of intelligent home terminals is large and enough amount of connections have to be ensured.
The most vital thing is that after the addition of the above traits, it can also ensure that the cost of the device is under control under a suitable range.
De geschiedenis van een breedbandnetwerk met laag vermogen
European Radio Messaging System refers to a European common radio paging standard invented by European Telecommunications Standards Institute in 1990, which took use of the 169 MHz RF band. The Meeting of European Postal and Telecommunications Authorities and the Electronic Communications Committee (ECC) came up with the decision to distribute the frequencies to other new scenes covering remote metering reader in 2005. The radio spectrum of ISM 169 MHz in Europe is available for use and free of charge in terms of the license, which can be utilized as a free-charged license band for shorter distance equipment.
- In 2005, the WM-Bus agreement was introduced (also named aka EN13757-4 and 433 MHz and 868 MHz).
- Suez invented an AMI infrastructure for a smart water meter on the basis of the 169 MHz frequency and began its deployment in Europe.
- In 2008, Suez introduced the 1st wireless module for remote water metering working at 169 MHz.
- In 2012, GRDF came up with a decision to choose the 169 MHz frequency band for its program and achieved significant results.
- In 2013, the 1st version of the AFNOR (French Association for Standardization) Guidance for Gas Application was introduced.
- From 2014 to 2015, the High performance 169MHz multichannel modem on the basis of SDR (Software Defined Radio).
- Telecom level infrastructure, water and gas meters
- In 2017, the Wize Alliance introduced Wize Agreement 1.0.
- AFNOR of Water and Gas Metering Application Guidance was introduced.
- The Wize Alliance Link was established – CEN TC294
- In 2018, EN13757/2018 was introduced.
- In 2019, the Wize Alliance introduced Wize Agreement 1.1.
- The gas and water meters of the Wize was largely deployed in Europe, with around ten million up to now.
