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The Huawei E220 is a Huawei HSDPA access device manufactured by Huawei and notable for using the USB interface (USB modem). Technically it is a modem, USB and (due to the ISO 9660 format) virtual CD-ROM device. Launched on 21 June 2006, [1] the device is used for wireless Internet access using 3.5G, 3G, or 2G mobile telephony
4G eLTE is Huawei's proprietary derivative of the LTE standard, the "e" standing for "enhanced", intended to provide wireless broadband transmission with peak downlink speeds of 50 Mbit/s and 20 Mbit/s uplink per site in 5 MHz, 10 MHz and 15 MHz frequencies.
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
Huawei launched the E5 at the Mobile World Congress in Barcelona in February 2009. It was originally named the E583X [2] and is also known as the E5830/E5852. [3] The E5 offers high-speed wireless connectivity, providing users with group internet access, individual Wi-Fi hotspots and connection to devices such as notebooks, digital cameras and games consoles.
Wi-Fi networks have a range that's limited by the frequency, transmission power, antenna type, the location they're used in, and the environment. [1] A typical wireless router in an indoor point-to-multipoint arrangement using 802.11n and a stock antenna might have a range of 50 metres (160 ft) or less.
International ITG Conference on Antennas, ISBN 978-3-00-021643-5, pages 45–48. Mar 30 2007. “Adaptive Arrays and Diversity Antenna Configurations for Handheld Wireless Communication Terminals” by Carl Dietrich, Jr. Feb 15, 2000. “Adaptive Antenna Tutorial: Spectral Efficiency and Spatial Processing” by Marc Goldburg.
IEEE 802.15.4 protocol stack. Devices are designed to interact with each other over a conceptually simple wireless network.The definition of the network layers is based on the OSI model; although only the lower layers are defined in the standard, interaction with upper layers is intended, possibly using an IEEE 802.2 logical link control sublayer accessing the MAC through a convergence sublayer.
The 5.5 GHz cantenna dimensions are almost perfect in that they make a good fit for the standard TV satellite dish. The resulting setup is a low-cost high-quality high-gain antenna. [ 6 ] Such setups are widely used in wireless community networks for long-distance Wi-Fi links.