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High-Tech Dictionary >> Wireless
Word Definition
802.1x
802.1x is an IEEE authentication specification that allows a client to connect to a wireless access point or wired switch but prevents the client from gaining access to the Internet until it provides credentials, like a user name and password, that are verified by a separate server. In 802.1X, there are three roles: the supplicant (client), authenticator (switch or access point), and authentication server.
802.20
802.20 is an IEEE standard of Mobile Broadband Wireless Access (MBWA) by specifying new mobile air interfaces for wireless broadband. 802.20 is a competing standard with 802.16e. 802.16e, based on 802.16a, adds mobility in the 2-to-6 GHz-licensed bands, while 802.20, a brand new standard, aims for operation in licensed bands below 3.5GHz and with a peak data rate of over 1 Mbit/s.
802.22
802.22 is an IEEE standard for Wireless Regional Area Networks (WRAN). IEEE 802.22 specifies a cognitive air interface for fixed, point-to-multipoint, wireless regional area networks that operate on unused channels in the VHF/UHF TV bands between 54 and 862 MHz. Signals at these frequencies can propagate 40 km or more from a well-sited base station, depending on terrain.
A2DP: Advanced Audio Distribution Profile
The Advanced Audio Distribution Profile (A2DP) in Bluetooth specifies the protocols and procedures that define the distribution of high quality audio content, in either mono or stereo on Asynchronous Connectionless Link (ACL) channels.
AAS: Adaptive Antenna System
Adaptive Antenna System (AAS), also called Advanced Antenna System, is a technology to enable the network operators to increase the wireless network capacity. In addition, adaptive antenna systems offer the potential of increased spectrum efficiency, extended range of coverage and higher rate of frequency reuse. Adaptive antenna systems consist of multiple antenna elements at the transmitting and/or receiving side of the communication link, whose signals are processed adaptively in order to exploit the spatial dimension of the mobile radio channel. Depending on whether the processing is performed at the transmitter, receiver, or both ends of the communication link, the adaptive antenna technique is defined as multiple-input single-output (MISO), single-input multiple-output (SIMO), or multiple-input multiple-output (MIMO).
A-Band cellular
In the U.S. cellular service industry, A-Band cellular is the alternative carrier to the regional Bell operating company's cellular subsidiary
Absolute Grant
Absolute Grant (AG), a term used in the mobile wireless channel definition, means the absolute value of the power offset permitted for the power usage.
Absorption Spectrum
Absorption Spectrum is a diagram which shows the wavelengths of electromagnetic radiation absorbed by a material. The material could be a gas, a solute or a solid. An absorption spectrum is, in a sense, the inverse of an emission spectrum.
A-Key
A-key is a secret number issued to a cellular phone that is used in conjunction with a subscriber's shared secret data information for authentication
AC: Authentication Center (or AUC)
The Authentication Centre (AC or AUC) is a function to authenticate each SIM card that attempts to connect to the GSM core network (typically when the phone is powered on). Once the authentication is successful, the HLR is allowed to manage the SIM and services described above. An encryption key is also generated that is subsequently used to encrypt all wireless communications (voice, SMS, etc.) between the mobile phone and the GSM core network.
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Word : Extended Data Out Dynamic RAM
Explanation : EDO DRAM. A fast dynamic RAM chip that is often used with Pentium processors.
 
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Tech Word for Today
 Word : EGCS: Experimental/Enhanced GNU Compiler System.
 Explanation : Experimental/Enhanced GNU Compiler System(EGCS) was a compiler system which forked from the GNU Comp
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