Difference between revisions of "WirelessHART"
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| + | WirelessHART est une technologie adaptée aux réseaux de capteurs basée sur le Highway Addressable Remote Transducer Protocol (HART) |
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| + | Caractéristiques: |
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| − | Key Capabilities: |
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| + | * Fiable même avec un fort bruit, grâce à sa topologie topologie "mesh", aux changement de chaîne, e.t aux messages synchronisés |
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| − | • Reliability even in the presence of interference, thanks to technology like mesh networking, channel hopping, and time-synchronized messaging. WirelessHART coexistence with other wireless networks is assured. |
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| + | * Sécurité et confidentialité des communications grâce aux chiffrement, authentification etc. |
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| + | * Faible consommation adaptée aux appareils sur batteries, panneaux solaires etc. |
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| − | • Security and privacy for network communications through encryption, verification, authentication, key management, and other open industry-standard best practices. |
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| + | Le protocole HART est basé sur 5 caractéristiques clés : |
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| − | • Effective power management through Smart Data Publishing and other techniques that make batteries, solar and other low-power options practical for wireless devices |
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| + | * Saut de fréquences |
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| + | * Ajout automatique d'un noeud |
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| + | * Topologie mesh |
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| + | * Transferts de messages sécurisés |
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| + | Ce protocole n'est qu'un protocole parmi les nombreux utilisés dans les réseaux de capteurs. |
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| − | The underlying principle for the HART protocol implementation is the ” Time Synchronized Mesh Protocol (TSMP) “. Comprising the TSMP are five key components for time-synchronized communication: |
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| − | frequency hopping |
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| − | automatic node joining |
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| − | fully redundant mesh routing |
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| − | secure message transfer |
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| − | The HART protocol for communications in wireless sensor networks is just one of the many available, including ZigBee, Ethernet and proprietary implementations. |
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| + | Ressources : |
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http://www.mouser.fr/applications/rf-sensor-networks/ |
http://www.mouser.fr/applications/rf-sensor-networks/ |
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Revision as of 18:46, 11 April 2016
WirelessHART est une technologie adaptée aux réseaux de capteurs basée sur le Highway Addressable Remote Transducer Protocol (HART)
Caractéristiques:
- Fiable même avec un fort bruit, grâce à sa topologie topologie "mesh", aux changement de chaîne, e.t aux messages synchronisés
- Sécurité et confidentialité des communications grâce aux chiffrement, authentification etc.
- Faible consommation adaptée aux appareils sur batteries, panneaux solaires etc.
Le protocole HART est basé sur 5 caractéristiques clés :
- Saut de fréquences
- Ajout automatique d'un noeud
- "Network formation"
- Topologie mesh
- Transferts de messages sécurisés
Ce protocole n'est qu'un protocole parmi les nombreux utilisés dans les réseaux de capteurs.
| Protocol | Standard & Operating Frequency | Description | Example Modules | Advantages | Disadvantages |
| Zigbee | IEEE 802.15.4ISM band 2.4GHz and 900MHz | A mesh-networking standard for control and monitoring; building/home automation, embedded sensing. Distance range of up to 50 m. | NXP Panasonic |
Low-cost, power efficient, easy solution for small networks. Use is widespread. | Cannot serve a high number of nodes within the specified period. |
| WirelessHART - Highway Addressable Remote Transducer Protocol | IEEE 802.15.4ISM band 2.4GHz. | A multi-vendor standard specifically designed for process monitoring and control; mesh networking with large numbers of sensors/nodes. Range is less than 100 feet. | Panasonic | Designated as an International standard. Built on a 30-year old HART technology. An accepted standard. Created specifically for industrial controls. | Not compatible with some existing wired protocols (FieldBus®, Profibus®, etc.)Up to 250 nodes on a network. |
| ISA-100.11a | IEEE 802.15.4ISM band 2.4GHz. | A multi-vendor standard for reliable and secure wireless connectivity for non-critical control and monitoring. Low-data-rate, very low power consumption. ISM band 2.4GHz. Range of 600m. | RFM Microchip Panasonic |
Can scale above 250 nodes per network. An accepted standard. Created specifically for industrial controls. 600m range. | Not yet in wide use. Communicates with HART®, Fieldbus®, Modbus®, Profibus®. |
| Wi-Fi – Low power | IEEE 802.11a/b/g/n/ac2.4 GHz and 5GHz. (inconsistent worldwide) | Mature wireless standard developed for commercial/consumer use. Maximum distances from 100 – 200m. | Murata Microchip |
Higher data rate.Mature technology; no bridges required to interface to the web. | Higher power consumption. |
| Bluetooth Low Energy | IEEE 802.15.1ISM band 2.4GHz. | Replaces serial connections like RS-232 and RS-485 and Ethernet over short distances (<100m) | Murata Panasonic |
Compatible with large number of consumer devices. Low cost with high data rate(1 Mbit/s). | Consumes more power than 802.15.4 protocols, but less than 802.11 |
Ressources : https://en.wikipedia.org/wiki/WirelessHART http://sourcetech411.com/2013/05/hart-protocol-for-communications-in-wireless-sensor-networks/ http://www.mouser.fr/applications/rf-sensor-networks/