RF-protocol

868MHz: This is the RF frequency that has been adopted by Europe as to be the frequency that if used must then operate within agreed criteria, for example standards for this frequency specify the communication power levels and dictate the number of times a product can transmit (cycle) over a given time period. It is a well controlled relatively ‘quiet’ band used by manufacturers. It allows Airios to provide wireless capability offering the greatest protection from outside interference but also ensuring that these wireless controls do not have an effect on other wireless products.

 

The expected range of communications: Within a typical house wireless products should communicate reliably within a 30m range. It is important to take into consideration that walls and ceilings will reduce the RF signal.

 

How do we design our devices to minimize the risk of reduced efficiency in areas where other wireless signals are operating?

 

• Our wireless communications are robust and do not interfere with other wireless technologies that can be found in normal domestic situations;

 

• Our products do not broadcast continuously;

 

• We transmit only on a single band with a high data transmission rate which minimizes the transmission time which reduces the risk of conflict with other transmissions in the area;

 

• The output power of the wireless devices is, dependent on the device, between 200 to 400 times less than a mobile phone;

 

• Our products conform with the demanding class 2 receiver requirements as defined by ETSI EN300220-1.

 

How reliable is 2-way RF communication?

 

The 2-way RF communication is extremely robust and reliable. When installed correctly the signal strength test feature allows the Installer to locate the system components where mutual signal reception is strong.

 

During communication, signals are sent several times to ensure receipt, and if any message is garbled, the error detection software recognizes this and ensures the message is repeated again. The benefit of the two way RF is that symbols showing successful communications and systems operation can appear on both transmitter and receiver, making testing and fault finding easy.

 

How are our devices designed to minimize the risk of causing reduced efficiency in other wireless devices?

 

In order to ensure that other devices do not get wireless instructions that may interfere with their operation we have developed our own protocol (language) so that even if a message is received by another device it will not act upon it as it will not recognize the instructions, thus ensuring we avoid conflict with other products in same frequency band.

 

To maximize transmission reliability the transmission times are randomized. In this way the risk that some transmissions will ‘collide’ is minimized.

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The comprehensive specifications of our wireless products mean that:

 

They are suitable for many types of buildings including single homes; apartments; multi occupancy homes; shops & small businesses. The wireless signal is proven to work through a wide variety of building materials (Concrete, brick, wood, etc).

 

We have tested the devices and our stated wireless ranges are:

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• Open field range approximately 100 metres

• In home range 30 metres

• The wireless signals will operate through one concrete floor up and down.