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About This Item
Full Description
The design is characterised by
- keeping the communications very short, infrequent and mostly unidirectional, and
- using communication frequencies that provide a good range even at low transmit power and avoid collisions from disturbers.
This part of ISO/IEC 14543 specifies OSI Layers 1 to 3 of the Frequency Modulated Wireless Short-Packet (FMWSP) protocol. It makes use of a frequency modulated signal well adapted to mobile devices and also supports high frequency wireless communications.
The FMWSP protocol system consists of two, and optionally three types of components that are specified in this standard. These are the transmitter, the receiver and optionally the repeater. Repeaters are needed when the transmitter and the receiver are located such that no good direct communication between them can be established. By direct communications the functional distance of the system is up to 300 m line-of-sight including the Fresnel zone and up to 30 m in buildings.
Since wireless communications may be overheard by receivers outside the intended environment, users should be aware of the risks this might cause before installing any wireless system. In contrast to listening devices, however, protection against malicious attacks for the technology in this standard can partly be handled in the upper layers, and is thus not treated here.
Cross References:
ISO/IEC 7498-1
ISO/IEC 14543-2-1
ISO/IEC 14543-3-1
ISO/IEC 14543-3-2
ISO/IEC 14543-3-3
ISO/IEC 14543-3-4
ISO/IEC 14543-3-5
ISO/IEC 14543-3-6
ISO/IEC 14543-3-7
ISO/IEC 14543-3-10
ISO/IEC TR 14543-4
ISO/IEC 14543-4-1
ISO/IEC 14543-4-2
ISO/IEC 14543-5-1
ISO/IEC 14543-5-22
ITU-T I.432.1
IEEE 194-1977
All current amendments available at time of purchase are included with the purchase of this document.