Common Comunication

Comunication

It is used to connect all the remote terminal units to the supervisory system. Connects wireless devices to open protocol automation system and business applications. Consists of a radio module with integrated antenna which collects the data from every sensor and is given to the gateway. The gateway transmitts these data to server with help of GSM.

Radio Module

An RF Module (Radio Frequency Module) is a (usually) small electronic circuit used to transmit and/or receive radio signals on one of a number of carrier frequencies. RF Modules are widely used in electronic design owing to the difficulty of designing radio circuitry. Good electronic radio design is notoriously complex because of the sensitivity of radio circuits and the accuracy of components and layouts are required to achieve the operation on a specific frequency. Design engineers will design a circuit for an application which requires radio communication and then "drop in" a radio module rather than attempt a discrete design, saving time and money on development.

Mesh Network

Mesh networking (topology) is a type of networking where each node must not only capture and disseminate its own data, but also serve as a relay for other nodes, that is, it must collaborate to propagate the data in the network.

A mesh network can be designed using a flooding technique or a routing technique. When using a routing technique, the message propagates along a path, by hopping from node to node until the destination is reached. To ensure all its paths' availability, a routing network must allow for continuous connections and reconfiguration around broken or blocked paths, using self-healing algorithms.

Technology used:

• Z-wave
• En ocean
• NanoNet
• KNK RF
• Zigbee/IEEE 802.15.4

Radio Frequency

The free RF is used for this wireless transmission.
The maximum distance for RF coverage depends on the frequency band.

GSM
Elpro Wireless Building Management system uses GSM for remote data transmission from Gateway to the Server, which provides both information on objects and the option of remote configuration or change of these objects. GSM or Global Systems for Mobile Communications is a solution developed by ETSI (European Telecommunications Standards Institute) and is the most popular and widespread standard for mobile communications in the modern world.

GSM is based on a digital cellular network formed by a series of cellular broadcasting towers where the maximum distance between two towers is 35km. This is a dense coverage which ensures a high data transmission quality and, along with the development of data broadcasting technology, constantly increasing data transmission rates.

To put it simple, a GSM network consists of an exchange which is connected with the base stations via fixed connections and of SIM cards which connect to the base stations.