Wireless Classification Types

Classification Types

  1. Based on Distance 

  • Wireless Personal Area Network (WPAN)

Personal Area Network is usually defined as anything at one arm distance from a person. It extends upto 30feet / 10m. Applications such as Infra red, Bluetooth, Passive RFIDs are generally considered in this.

  • Wireless Local Area Network (WLAN)

Extending PAN by 10 times approx. makes it within the boundaries of LAN thereby defining its range upto 300 feet / 100m. Cordless phones and Zigbees are its typical examples.

Wireless Metropolitan Area Network (WMAN)

There is no specific range defined for this but it generally extends to few kms/miles. Cellular, WiMAX are few of its examples.

  • Wireless Wide Area Network (WWAN)

This exists beyond a country or nation or entire world. It is generally extended to several hundreds/thousand miles/km. Typical examples include Satellite communication, long range cellular communications.

 2.  Based on Modes

  • Peer to peer  / Adhoc mode

When two wireless capable devices are able to establish a wireless connection directly amongst themselves. They are said to have established adhoc mode of communication. It is comfortable when the peering is limited to 2 or 3 devices but it gets miserable when the device list is increased further to 8 - 10 devices. Collisions and Out of range issues prop up frequently leading to management difficulty/inefficiency.

  • Infrastructure mode

Here there exists a device centrally which acts as a bridge between wireless and wired network. All the wireless enabled client devices connect to this device. this device is called Access Point (AP).
AP relays the frames within clients. It acts as the infrastructure providing connection from one client to another. It is the Distribution System as it distributes frames from wireless to wired network and vice-e-versa. DS is the function of AP. Basic Service Area (BSA) is the area where we can connect to the AP. AP provides the basic service as connection.
Basic Service Set (BSS) is the connectivity service that AP provides to clients

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