Share On

With the advent of mobile phones, cameras, and Personal Digital Assistants (PDAs), the WLAN technology is becoming very popular.

Wireless Local Area Network or WLAN is sometimes referred as LAWN, for local area wireless networks. WLAN establishes a wireless radio connection between a mobile user and another computing device via LAN network. It links two or more wireless devices through a wireless distribution method within a local coverage area such as a school, home, computer laboratory, and office. It allows any user to move around in a small area, while still being connected to the network. Most of the modern WLANs are based on IEEE 802.11 standards and are marketed under the WiFi brand name.

Technical Standard in WLAN

Technical standards are the major concerns for a user looking to buy wireless LAN products. IEEE has set up a universal standard for wireless LANs. According to the project IEEE 802.11, 1Mbps is the minimum required bandwidth for WLANs to operate or transmit the digital data including voice, and audio files.

Types of WLANs:

Ad-hoc Networks: This type of network can be set up based on the number of users meeting in a small room or a conference, without requiring any wireless support or access point.

Ad-hoc networks are a key factor in the evolution of wireless communications. Ad-hoc networks are used in real-time business applications, corporate companies to increase the productivity and profit. Ad-hoc networks of PDAs or laptops are used in disaster relief, conferences and battlefield environments.

Infrastructure networks: In this type of network, the devices that are connected through a single access point or a wireless router. For example: Two persons sitting next to each other with two different laptops and communicating indirectly through the same wireless access point.

Different Transmission Methodologies Used in WLANs

There are three major methods used by WLANs to transmit information:

Microwave transmission: It is the technology which uses radio waves to transmit information or energy. For example: ALTAIR, a Motorola’s WLAN product transmits data by using low power microwave signals at the frequency of 18 GHz.

Spread Spectrum Transmission:

In this technology, there are two methods used by wireless LAN products which are:

  • Frequency Hopping: The transmitter device detects an ideal time and transmits the data using full channel bandwidth. If the channel is full, it hops the data to another channel and repeats the process.
  • Direct Sequence Modulation: In this method, the transmitter operates in a wide frequency range using Code Division Multiple Access (CDMA), which generates a code–through which a receiver identifies the signal transmitted by the sender unit. The frequency at which these signals are transmitted is called ISM (Industrial Scientific and Medical) band.

Infrared Transmission:

This method uses infrared light to transmit data. There are three types of infrared transmission methods.

  • Diffused: The sender unit fills the entire area with infrared light so that the receiver located in that area can receive the signals.
  • Directed: In this methodology, the infrared light is focused before transmitting the signal, which increases the rate of transmission.
  • Directed point-to-point: It provides the highest transmission speed than the other methodologies. Because in this method, the sender unit is aligned with the receiver unit and then the infrared light is focused directly to the receiver.

Audio Over Ethernet: Cobranet And IEEE / AVB Network Bridging Solutions

White Paper By: Clear One

Audio over Ethernet offers substantial potential cost savings in cabling and other infrastructure. With the convergence of IT systems and professional audio technologies, high fidelity, low-latency, digital audio can be efficiently distributed over Ethernet using one of many available protocols. As these technologies have evolved and the domains of sound transmission and information...

Brocade Virtual Traffic Manager and Parallels Remote Application Server

White Paper By: Parallels

The Brocade Virtual Traffic Manager and Parallels Remote Application Server Deployment White Paper describes the different ways of load-balancing different Parallels Remote Application Server (RAS) components. The guide also details the reference architecture of the Parallels RAS solution. Who Should Read This White Paper? This white paper is written for network operations professionals,...

RAN Virtualization Goes Beyond C-RAN with RF Routing

White Paper By: Dali Wireless

Radio Access Network (RAN) virtualization is a highly disruptive technology that will radically impact how wireless services are delivered. It will change the current ecosystem and market structure. RAN Virtualization will allow mobile operators to provide greater value to win and retain customers, reduce production cost per megabyte, and utilize available resources more efficiently. This...

Introducing A Digital Distributed Antenna System (DAS) For Public Safety In-Building Communications

White Paper By: Dali Wireless

In today’s emergency services operation, reliable public safety communications are essential from dispatch to mission critical situations and from voice only capabilities to voice and data. Public safety communications have evolved from fire call boxes, analog land mobile radios (LMR) to digital LMRs and trunked radio systems. Therefore, a flexible, future-proof and reliable solution...

RFID and Asset Management

White Paper By: E-ISG Asset Intelligence LLC

Radio frequency identification (RFID) technology has evolved significantly, from a niche technology to a widely adopted asset tracking and identification solution for better RFID asset management. RFID technology is providing new levels of visibility, enabling new applications and opening new markets. This white paper on RFID technology provides insights on how RFID asset management have...

Network Intelligence:Why the Cloud is the Network?

White Paper By: Doyle Research

Network intelligence based in the cloud enables IT organizations to quickly, easily, and securely adapt their network to the new cloud-oriented traffic flows. SD-WAN technology delivers the network intelligence required to increase remote work force with cloud-based applications and data. Read this whitepaper, “Why the Cloud is the Network”, to learn how to leverage the cloud as...

follow on linkedin follow on twitter follow on facebook 2018 All Rights Reserved | by: