IEEE 802.15.3

The wireless personal area network ( WPAN) is a special case of personal area networks. It refers to short-range radio technology which aims to avoid short, typical flying laid cable connections.

Unlike WLANs WPANs bridge shorter distances - are typical distances between 0.2 to 50 m. So that only the immediate environment of the channel is reached, the "personal area ".

Properties

The restriction to a smaller space are firstly disorders likely by a third party transmitter, on the other hand it follows from the lower transmit power and energy savings and thus a longer battery life, for example in notebooks.

The data transfer rates are typically lower than that of Wi-Fi. The less common VFIR IrDA specifies a maximum data transfer rate of 16 Mbit / s, the more frequently encountered FIR IrDA offers 4 Mbit / s and Bluetooth has up to 3 Mbit / s With wireless is derived from IEEE 802.11g standard, however, up to 54 Mbit / s.

Unlike Wi-Fi only point- to-point, possibly point-to- multipoint connections are made at typically WPANs. The multipoint-to - multipoint option is not provided in the standards.

WPANs are used to ad- hoc networking of PDAs, consoles, printers, laptops, netbooks and mobile phones. Typical applications include the exchange of business cards after the vCard standard and calendar entries for appointment scheduling. For lack of information security is a risk of Snarfings.

Networks should be set according to the ISO - OSI model is often implemented through an emulated serial port, a suitable protocol stack, such as SLIP or PPP. WLANs, however, use defined in the IEEE 802 structure and implement only the bottom two layers in the model differently.

Bluetooth offers in addition to an audio mode, what car kits and headsets can be controlled. With IrDA, there is the IrDA CONTROL standard, which comes as for remote controls are used.

In theory, wireless mice and keyboards can be connected via Bluetooth or IrDA, however, proprietary protocols are more widespread.

IEEE

The IEEE consortium shares WPANs in the following standards on:

IEEE 802.15.1

IEEE 802.15.1 corresponds to the international standards of Bluetooth SIG ( Bluetooth Special Interest Group ) as of V1.2. Current standard of Bluetooth SIG is version 4.0 dated 17 December 2009. Contains two different protocol stacks (protocol stacks ) that build with different time needs a unilateral transfer or two-way connection-oriented communication.

IEEE 802.15.2

The IEEE 802.15.2 section recommends, such as Wireless Personal Area Networks ( 802.15 ) should cooperate with Wireless Local Area Networks ( 802.11). This includes Bluetooth ®, ZigBee ®, CSS and a UWB.

IEEE 802.15.3

IEEE 802.15.3 is responsible for transmission rates in WPANs of 20 Mbit / s or higher. It is also to realize the target lower power consumption. The area is still a proposal (September 2005).

Currently, the following transmission rates will be discussed: 11 Mbit / s, 22 Mbit / s, 33 Mbit / s, 44 Mbit / s and 55 Mbit / s The specification includes the medium access control (MAC) and Physical Layer (PHY).

IEEE 802.15.4

In the IEEE 802.15.4 standard the transmission method for low transfer rates are discussed. These products are used in remote controls, sensors and for easy transfer networks, especially used ad -hoc networks. There are a number of variants, such as IEEE 802.15.4a CSS. In the framework of definitions IEEE 802.15.4, which defines the low layers of the network access, for example, builds on the ZigBee specification, wants to ensure the interoperability between devices from different manufacturers.