WLAN Standards

Some of the important WLAN standards are provided below The IEEE standards are defined by the 802.11 set of standards. Some of the mainline standards are provided below 802.11-1997 –> first 802.11 standard for 2.4 GHz operation 802.11b –> Defines extensions to 802.11-1997 standard in 2.4 GHz mode 802.11a –> Defines 5 GHz operation in […]

Introduction to WLAN – Part 3

WLAN networks employ CSMA/CA mechanism to gain access of the medium to transmit data packets. CSMA stands for Carrier Sense Multiple Access. All WLAN devices sense if the medium is idle. only if the medium is sensed to be idle, the 802.11 Station device can transmit the frame. The CA in CSMA/CA stands for Collision […]

Introduction to WLAN – part 2

WLAN or Wi-Fi employs the following frequency bands for its operation – The 2.4 GHz band and The 5 GHz band. The 2.4 GHz band channel centre frequencies are placed 5 MHz apart. The Channel width of each channel is 22 MHz.  Since the channel centre frequencies are 5 MHz apart and the channel width […]

Introduction to WLAN

A Wireless Local Area Network (WLAN) is a Local area network where-in the endpoint devices do not connect via wires (i.e. an Ethernet Connection) to a network.  The user devices such as smart phones connect wirelessly. In most cases WLAN provides the end-point connectivity or provides a complete network in itself. WLAN uses the Industrial, Scientific […]