21 July 2013

Why IEEE 802.11 ac Wireless LAN Standard Is Awesome ? [Explained]

What is IEEE 802.11 ac? What is the speed of 802.11 ac? Is it the 5th Generation(5G) WI-FI standard? Have you ever thought that someday [and this year], the wireless LAN specifications will be upgraded to 802.11 ac? 

Introduction

IEEE or The Institute of Electrical and Electronics Engineers (read I-Triple-E) is an professional organization that develops and formulates global standards in a broad range of advanced technological innovation. IEEE headquarter is at New York City.

IEEE 802.11ac
IEEE 802.11 ac Wireless LAN Standard
IEEE 802.11 standard

Since they are formulating standards, IEEE 802.11 is a standard for MAC and Physical Layer specifications in implementing Wireless Local Area Network (WLAN) computer communication.

In Open Systems Interconnection (OSI) model, there are 7 layers:
1. Physical layer - these are media, signal and binary transmission. A omputer communicates with binary system. It has a unit of Bit.

2. Data Link  layer- physical addressing. It also provides means to transfer data network network layer and detect errors at the physical layerMedia Access Control Control is one of the functions in the Data link layer. 

Some protocols are implemented too such as PPP and Frame relay. The unit in the Data link is called Frame.

3. Network Layer - It is the IP addressing(used for path determination). It connects one host to a network. Unit is Packet or Datagram.

4. Transport Layer - it is the end to end connectivity. Thus, it transfers data to end users. Data unit is called Segments.

5. Session layer - a layer that controls communications for both local and remote application. It will establish and terminates connections. Unit is data.

6. Presentation layer - simply represent data encryption and decryption process. It also convert machine dependent data to independent data. Unit is data.

7. Application layer - it is the application used by the user to communicate. Some known protocols used here.

There are:
  • Hypertext Transfer Protocol (HTTP) - browser
  • File Transfer Protocol (FTP) - filezilla
  • Simple Mail Transfer Protocol (SMTP) - mail service.

IEEE 802.11 ac

IEEE 802.11 ac is a 5th generatioWI-FI standard in the family of 802.11 which provides high-throughput on WLANs at 5 Ghz band.

802.11 ac Specifications: Why it is awesome!

For multi-station, this 802.11 ac has several cool specs:
  • Throughput at least 1 gigabit per second (Gbit/s). Imagine. Just Imagine :)
  • A single link throughput at least 500 megabits per second (Mbit/s)
  • RF bandwidth (80 or 160 MHz)
  • High density modulation up to 256 QAM
802.11 ac Products
  • Last year June 2012,ASUS unveiled its ROG G75VX gaming notebook that supported 802.11ac.(source)
  • This year, June 2013, Apple unveiled its new MacBook Air supported 802.11 ac WI-FI standard at WWDC 2013. (source)
  • Also this year, in handset market, HTC announced its first 802.11ac enabled with HTC One last Feb. 19, 2013 and Samsung Galaxy S4 also annouced its capability with 802.11 ac compliance last March 14, 2013.
Infographics about IEEE 802.11

Infographics about IEEE 802.11
IEEE 802.11 History
More information

Early 2014, it is believed that 802.11 ad or WiGig will be out in the market.

Sources:
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