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Wi-Fi
Wireless Standards IEEE 802.11


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Wireless IEEE 802.11 Standard

Wireless Standards are set by the IEEE (Institute of Electrical and Electronics Engineers) www.ieee.org



Wi-Fi Speed Factors & Standards

802.11n (Wi-Fi 4): Operates on 2.4 GHz and 5 GHz, increasing throughput.
802.11ac (Wi-Fi 5): Uses 5 GHz, featuring MIMO technology.
802.11ax (Wi-Fi 6): Enhances efficiency in crowded areas using OFDMA.
802.11be (Wi-Fi 7): Focuses on ultra-high reliability.

Wi-Fi 5 (802.11ac): Common, reliable speeds, usually 300-500 Mbps, up to 1 Gbps+.

Wi-Fi 6 (802.11ax): Faster, more efficient for many devices, supporting 600-800 Mbps+.

Frequency:
5 GHz offers higher speeds but shorter range;

2.4 GHz offers lower speeds but covers a wider area and penetrates walls better.

Distance/Obstructions: Being in another room or further away significantly lowers speed.

Speeds:

100 Mbps: Good for households with several users for streaming, browsing, and video calls.

300–500 Mbps: Ideal for 4K streaming on 3–6 devices, online gaming, and large file downloads.

1 Gig (1,000+ Mbps): Best for power users, smart homes, and high-speed fiber internet.

Wireless Standards

Cell phones use wireless 3G, 4G LTE and 5G technologies. Wi-Fi is available on phones so while at home you can take advantage of broadband and save on your phone minutes.

Wireless communication for computers is widely available and virtually all new laptop computers have wireless capability. Wireless allows the user to connect to the internet without cables and allows hot-spots in public areas so users can connect while traveling. Hotels, airports, libraries all have wireless today.



Wireless data transmission has been improved over the years.
Wi-Fi 1 802.11 (1997) was used for computer to computer data exchange over short ranges but laid the framework for the future.
Wi-Fi 2 (1999) improved speeds of transmission up to a maximum of 54 Megabits per second (Mbps). Increased speed made Wi-Fi practical for homes, schools, libraries and businesses so data could be exchanged between laptops, phones and printers.

Wi-Fi 3 802.11g (2003) is compatible with Wi-Fi 1 devices and is more reliable.
Wi-Fi 4 802.11n (2009) introduced dual band support (2.4GHz and 5GHz). Speeds jumped up to 600 Mbps. Wi-Fi 4 was the backbone of wireless for five years and many home users got on board during these years, buying their first wireless router for home use.

Wi-Fi 5 802.11ac (2013) optimized for online streaming with faster speeds (1.5 Gbps) and multiple users.
Wi-Fi 6 802.11ax (2021) optimized for multiple users. May be considered overkill if you live alone, have a small home, few devices, and basic internet speeds (under 100 Mbps), then a high-quality Wi-Fi 5 router is likely all you need.

Wi-Fi 7 802.11be (2024) Multi-Link Operation (MLO): A cornerstone feature allowing devices to transmit and receive data across multiple bands (2.4, 5, 6 GHz) simultaneously for better speed and stability.
320 MHz Channels: Doubles the bandwidth of Wi-Fi 6 (160 MHz) to enable significantly higher data throughput.
4K-QAM (4096-QAM): Packs 20% more data into the same signal than Wi-Fi 6's 1024-QAM, enhancing efficiency.
16x16 MU-MIMO: Supports more simultaneous streams (up to 16) compared to 8 in Wi-Fi 6, improving performance for high-density networks.


The Wi-Fi Alliance didn’t launch its first 802.11ac certification program until mid 2013.

  • 802.11a - (July 1999) Wireless network bearer operating in the 5 GHz ISM band with data rate up to 54 Mbps


  • 802.11b - (July 1999) Wireless network bearer operating in the 2.4 GHz ISM band with data rates up to 11 Mbps


  • 802.11g - (June 2003) Wireless network bearer operating in 2.4 GHz ISM band with data rates up to 54 Mbps


  • 802.11n - (Oct 2009) Wireless network bearer operating in the 2.4 and 5 GHz ISM bands with data rates up to 600 Mbps


  • 802.11ad - Wireless network bearer providing very high throughput at frequencies up to 60GHz


  • 802.11af - Wi-Fi in TV spectrum white spaces (often called White-Fi)

The standards that are most widely known are the network bearer standards, 802.11a, 802.11b, 802.11g, 802.11n and 802.11ac


802.11ac

The newest generation of Wi-Fi signaling in popular use, 802.11ac utilizes dual band wireless technology, supporting simultaneous connections on both the 2.4 GHz and 5 GHz Wi-Fi bands. 802.11ac offers backward compatibility to 802.11b/g/n and bandwidth rated up to 1300 Mbps on the 5 GHz band plus up to 450 Mbps on 2.4 GHz.

Wi-Fi 6 (IEEE 802.11ax) is a high-efficiency wireless standard designed for dense environments, offering faster speeds (up to 9.6 Gbps), reduced latency, and better battery life for devices. It operates on 2.4 and 5 GHz bands, using Technologies like OFDMA and 1024-QAM to improve capacity, alongside WPA3 security for enhanced protection. Key Features and Improvements Capacity & Efficiency (OFDMA): Orthogonal Frequency Division Multiple Access (OFDMA) allows a single channel to serve multiple devices simultaneously, significantly increasing efficiency in crowded areas. Increased Speed (1024-QAM): Uses 1024-QAM to transmit more data within the same radio waves, offering higher throughput than Wi-Fi 5. Reduced Latency: Delivers up to 75% less latency compared to previous standards by improving data delivery efficiency. Better Battery Life (TWT): Target Wake Time (TWT) informs devices when to sleep/wake, reducing power consumption, especially for IoT gadgets. Improved Performance in Congestion: BSS Coloring allows access points to ignore interference from neighboring networks, improving reliability in apartments or offices. 8x8 MU-MIMO: Supports 8x8 Uplink/Downlink MU-MIMO, allowing more devices to communicate with the router simultaneously. Wi-Fi 6E Extension Wi-Fi 6E extends the standard into the 6 GHz band, adding up to 1,200 MHz of spectrum for faster, non-congested connectivity.

Requirement: Requires both a Wi-Fi 6 router and Wi-Fi 6 compatible devices to see performance benefits.

The iPhone 17 lineup features Apple's proprietary N1 networking chip, which supports Wi-Fi 7 (802.11be) for improved speed and reliability.

An iPhone 14 connected to a Wi-Fi 7 router will typically achieve real-world download speeds between 500 Mbps and 900+ Mbps, with maximum link speeds often sitting around 1.2 Gbps. While Wi-Fi 7 enables faster potential, the iPhone 14 is limited to Wi-Fi 6 (802.11ax) technology, preventing it from utilizing Wi-Fi 7 or 6E speeds.

Most 2025 43-inch LG UHD and QNED TVs (such as the 43UA7700PUB, 43UA7000PUB, and 43UA7500ZUA) support the Wi-Fi 5 (802.11ac) standard. While Wi-Fi 5 is the primary spec for these entry-level to mid-range models, they offer strong connectivity for 4K streaming. Bluetooth 5.0 is also standard.

802.11

Network bearer standards

All the 802.11 Wi-Fi standards operate within the ISM (Industrial, Scientific and Medical) frequency bands. These are shared by a variety of other users, but no license is required for operation within these frequencies. 

There are a number of bearer standards that are in common use. These are the 802.11a, 802.11b, and 802.11g standards. The 802.11n standard provides raw data rates of up to 600 Mbps.

Each of the different standards has different features and they were launched at different times. The first accepted 802.11 WLAN standard was 802.11b. This used frequencies in the 2.4 GHz Industrial Scientific and Medial (ISM) frequency band, this offered raw, over the air data rates of 11 Mbps using a modulation scheme known as Complementary Code Keying (CCK) as well as supporting Direct-Sequence Spread Spectrum, or DSSS, from the original 802.11 specification. 

Almost in parallel with this a second standard was defined. This was 802.11a which used a different modulation technique, Orthogonal Frequency Division Multiplexing (OFDM) and used the 5 GHz ISM band. Of the two standards it was the 802.11b variant that caught on. This was primarily because the chips for the lower 2.4 GHz band were easier and cheaper to manufacture.

The 802.11b standard became the main Wi-Fi standard. Looking to increase the speeds, another standard, 802.11g was introduced and ratified in June 2003. Using the more popular 2.4 GHz band and OFDM, it offered raw data rates of 54 Mbps, the same as 802.11b. In addition to this, it offered backward compatibility to 802.11b. Even before the standard was ratified, many vendors were offering chipsets for the new standard.

802.11n - Access Point operational modes

In view of the features associated with backward compatibility, there are three modes in which an 802.11n access point can operate:

  • Greenfield (only 802.11 n) - maximum performance
  • Mixed (both 802.11 a, b, g, and n)
  • Legacy (only 802.11 a, b, and g)

The new IEEE 802.11 n standard provides a major improvement in the speed at which data can be transferred over a wireless network. While this may not be needed for many small networks where small files are being transferred, the amount of data being passed over most networks is increasing with many more large files, including photos, video clips (and videos), etc. being transferred. With the levels of data only set to increase, the new 802.11n standard will be able to meet the challenge of providing the required capacity for wireless or Wi-Fi networks.


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FAQ

Question: Which Microsoft Windows systems support wireless?

Answer: Windows XP, Vista, Windows 7, 8 and 10 have built-in support for Wi-Fi while earlier Windows O.S. such as Windows 2000 rely on a vendor supplied solution.

Question: What are the best wireless routers to match my computer?

Answer: Compatible routers are available from Netgear, D-Link, TP-Link, Belkin and Cisco.

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