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Title: Comparison of Wireless-AC and Wireless-N technologies

Article ID: 26471


What is 802.11ac?

The IEEE 802.11ac (draft 3.0) is a wireless networking standard that is designed to support bandwidth-intensive activities better, such as multiple high-definition video streaming.  At Very High Throughput (VHT), the new 802.11ac standard can achieve a speed of up to 1.3 Gigabit per second as it takes advantage of advanced modulation techniques that allow the technology to cram more bits of data into every transmission.

Although the 802.11ac standard is backwards compatible with all 802.11a/n clients, 802.11ac devices will operate exclusively on the 5 GHz frequency

NOTE:  The 2.4 GHz band can support 802.11b/g/n devices.  For a video overview of the Wireless-AC and the Linksys EA6500 Router, click here.

This article lists the differences between the Wireless-AC and Wireless-N technologies.  Check the table below to learn more:

      •    Throughput – Average rate of successful data transfer over a network Channel.
      •    Channel Width – This is where data travels.  The wider the Channel, the faster data can be transferred.
      •    Modulation – Process of transmitting an information signal (e.g. digital bit stream) by using another type of signal capable of being transmitted over a Channel.
      •    Number of Spatial Stream – Number of streams of data being transmitted.  The higher the number of spatial streams, the higher the throughput.
      •    Beamforming Mechanism – Provides directional signal transmission and reception.  The relative direction of the wireless device is known and the signal is correspondingly strengthened in that direction.
      •    Radio Frequency (RF) Band – Frequency of the wireless signal that it operates on.

 

802.11ac 

802.11n

Throughput

 Up to 1.3 Gbps

Up to 450 Mbps

Channel Width

 80,160, 80+80 MHz Channels

20 MHz and 40 MHz Channels

Modulation

 256 QAM

64 QAM

Number of Spatial Stream

 1-8**

1-4*

Beamforming Mechanism

 Yes

No

RF Band

 5 GHz only

2.4 GHz and 5 GHz

**Multi-user MIMO uses spatial multiplexing to direct spatial streams in the same Channel to different receivers, allowing for more efficient use of the Channel.  Two (2) 1x1 802.11ac device will each have its own 433 Mbps data rate spatial stream, bringing the total network data rate to 866 Mbps.

*In a single-user MIMO environment, devices compete for Channel use in a non-cooperative manner.  The clients will have 1x1 802.11ac radios, limiting them to 433 Mbps.  In single-user MIMO, the total data rate of the network will be 433 Mbps.

Improving wireless connection speed

There are many factors that affect the wireless network connection between your router and wireless device.  An example would be the wireless adapter and router’s compatibility.

Wireless standards such as 802.11ac and 802.11n are created to specify wireless connection information like throughput and the achieved range if you connect devices compatible with these standards.  For example, if you connect a smartphone that is compatible with 802.11n to a Linksys Smart Wi-Fi Router, EA6500, you will achieve a network connection up to 450 Mbps within the optimal range.

For more details on verifying the maximum wireless connection speed of your wireless device to the router, click here.

Improving wireless network range

To improve the range of your wireless network, first you need to ensure that you place your wireless router on a spot where obstructions (such as furniture, fixtures, and tall appliances) are least.  These will block the signal which will shorten the range of your wireless network.

If you have placed the router in the best spot possible yet you are still having problems with getting a good signal, you might want to add a Linksys RE2000 Range Extender to your network.  Below are some links to articles which provide information about the product and how to use it:

Getting to know the Linksys RE2000
Extending the range of your wireless network using the Linksys range extender

 

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