For the IEEE802.11 protocol in WiFi, a large number of data queries are conducted, and the historical development is summarized as follows. The following summary is not a comprehensive and detailed record, but a description of the protocols currently used in the market.
IEEE 802.11, established in 1997, is the original standard (2Mbit/s, broadcast at 2.4GHz). Its speed is relatively slow, which lays the foundation for wireless protocols.
IEEE 802.11a was formulated in 1999. It is intended to supplement the physical layer (54mbit/s and the frequency band is 5GHz).
IEEE 802.11b, formulated in 1999, is a supplement to the 2.4GHz physical layer proposed by 11 (11mbit/s, broadcast at 2.4GHz).
IEEE 802.11g, 2003, physical layer supplement (54 mbit/s, 2.4GHz broadcast).
IEEE 802.11n. The transmission rate has improved under this protocol. The basic rate is increased to 72.2 mbit/s, and the double bandwidth of 40 MHz can be used. At that time, the rate was increased to 150 mbit/s. Support for multi-input, multi-output (MIMO) technology. This protocol jointly improves the frequency band between 2.4GHz and 5GHz.
IEEE 802.11ac, the potential successor of 802.11n, is the improvement of a higher transmission rate. When multiple base stations are used, the wireless rate is increased to at least 1 Gbps and the single channel rate is increased to at least 500 Mbps. Use a higher wireless bandwidth (80 Mhz-160 MHz, compared to 802.11n’s 40 MHz), more MIMO streams (up to 8), and a better modulation mode (QAM256). The formal standard was launched on February 18, 2012.
Among them, there is a special protocol. In addition to the above IEEE standards, another technology called IEEE 802.11b + provides a data transmission rate of 22mbit/s based on IEEE 802.11b (2.4GHz band) through pBCC technology.
The above is the knowledge explanation of the IEEE 802.11 standard list brought to you by Shenzhen HDV Phoelectron Technology Co., Ltd. hope this article can help you to increase your knowledge. Besides this article if you’re looking for a good optical fiber communication equipment manufacturer company you may consider about us.
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