Personal Area Network (PAN) is computer networks needed for data transmission amongst devices like personal digital assistants, computers and telephones. PANs are used for communications amongst intrapersonal communication (personal devices themselves) or for connection of high levelled network and internet (an uplink). (WPAN) Wireless Personal Area Network is PAN being carried over wireless technology of network like Bluetooth, IrDA, Z-Wave, Body Area Network, INSTEON, ZigBee, and Wireless USB. WPAN reaches varies to few metres from few centimetres. PAN is carried also over wired buses of computers like FireWire and USB. Connection of Wired PAN: Data cables are examples of Wired PAN connections. It is Personal Area Network because this connection is for personal use of users. PAN has being used for only personal uses.
Connection of Wireless Personal Area Network: (WPAN) is PAN of wireless kind. It is network for inter-connection of devices being centred on individual workspace of person. In this, connections must be wireless. The Wireless PANs are based on standard IEEE 802.15. 2 kinds of technologies being wireless and being used for WPANs are Infrared Data Association and Bluetooth. WPAN serves interconnecting all ordinary communicating and computing devices which many people carry with themselves or have on desk. It serves more specialized purposes like allowing surgeons and different team members in communicating whilst operations are conducted. Key issues in technologies of WPANs are called “plugging in”. In ideal scenarios, when 2 WPAN equipped devices come close to one another or in close proximity within some metres of one another. Or, within few kilometres of centralized server, they have communications as if having cable connections. Other crucial features are abilities of all devices locking out different selective devices in turn preventing unwanted interferences or accessibility unauthorized to information. WPANs technologies are in their infancy. It is rapidly undergoing development. Operating frequencies proposed is around 2.4GHz in modes digitally. Objectives are facilitating seamless operations amongst business or home systems and devices. All devices in WPANs have abilities of plugging to other devices in similar WPAN. This is possible provided devices are within physical ranges of one and other. Additionally, worldwide WPANs shall remain interconnected. So, for instance, an archaeologist on sites in Greece can use PDAs for accessibility of databases directly at University of Minnesota in Minneapolis and thereby transmitting findings to particular database.
Bluetooth: The Bluetooth uses radio waves of short ranges over distances approximately till 10m. For instance, Bluetooth devices like pointing devices, audio headsets, printers and key boards connect to cell phones, computers or (PDAs) personal digital assistants wirelessly. Bluetooth PAN is called also “piconet”. This is combination of pico and net. Pico stands for very small, may be one trillionth and net stands for network. It is made of eight active devices in relationship of master-slave. Lots of and plenty of devices are connected in “parked” modes. 1st Bluetooth device in piconet is master. Rest all devices are being slaves. The slaves communicate with master. Typically piconet has ranges of 10m or 33 feet. Though ranges to 100m or 330 feet is reached in perfect and ideal circumstances. Infrared Data Association (IrDA): The Infrared Data Association (IrDA) utilizes infrared lights. This has frequencies below sensitivities of human eyes. Infrared (IR) is used generally, for example in remotes of TVs. WPANs devices typically use IrDA. This includes different serial data interfaces, printers and keyboards. WPAN uses Bluetooth technology for connecting all things from ear pieces and cell phones to desktops and keyboards.
When question of wireless arises people thinks about Wi-Fi hot spots or wireless routers. The Bluetooth acts such as wire wireless which connects short distant components.