There are many differences between the 802.11n and previous 802.11 standards:
The 802.11n standard supports more than 100 MSDU or MPDU frames for each association or re-association; previous 802.11 standards support up to four separate MSDU/MPDU frames.
In 802.11n, the data rates can vary from 5 Mbit/s to 600 Mbit/s, depending on the number of MSDUs/MPDUs the frame carries. Previous standards only support data rates up to 11 Mbit/s.
802.11n supports MIMO, a wireless technology that uses multiple antennas that increase the speed of data transfer.
The 802.11n standard supports multiple-input multiple-output (MIMO) in the 2.4GHz and 5GHz bands. MIMO is a technology that uses multiple antennas on the router and wireless client, to create spatial multiplexing of data streams, thereby increasing the speed of wireless networks by over 300 percent. MIMO technology enables a single antenna at a wireless client to receive data from multiple antennas at a wireless router, or use multiple antennas at the wireless router to send data to multiple antennas at a wireless client. MIMO technology is particularly useful in applications that require high speeds, such as video streaming.
802.11n is a multiple input and multiple output (MIMO) wireless standard. This means the router and wireless client can have multiple radios and antennas, and this technology uses the multiple radios and antennas to increase the speed of data transfer by over 300 percent. The stronger the wireless signal the faster the data will travel.
The network will be named Wi-Fi, but the Wi-Fi radio should be named Wi-Fi0, and the connected device should be named Wi-Fi0 (which is not the case for all Mac OS X systems, but usually correct).
IEEE 802.11n—Amendment to the IEEE 802.11-2007 standard;
IEEE 802.11n—Amendment to the IEEE 802.11-2007 Standard for Information Technology - Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Enhancements for higher efficiency and higher throughput;
IEEE 802.11n—Amendment to the IEEE 802.
IEEE 802.11n is an amendment to the IEEE 802.11-2007 wireless-networking standard that is backward compatible with all previous 802.11 versions. Its purpose is to improve the performance of 802.11b/g/n wireless-network devices by using a combination of multiple-input multiple-output (MIMO) and orthogonal frequency division multiplexing (OFDM) technologies. IEEE 802.11n also provides for automated (e.g., dynamic channel allocation) and dynamic (e.g., adaptive modulation and coding) wireless-network features. IEEE 802.11n is designed for optimum performance in a typical indoor wireless-network environment. The IEEE 802.11n standard is organized into 11 subchapters. These include the following: 827ec27edc