HARQ – Hybrid ARQ

Hybrid automatic repeat request (Hybrid ARQ or HARQ) is a variation of the ARQ error control method. In standard ARQ, error-detection information (ED) bits are added to data to be transmitted (such as cyclic redundancy check, CRC). In Hybrid ARQ, forward error correction(FEC) bits are also added to the existing …

Automated Repeat Request – ARQ

ARQ  is a technique that is used to ensure that a data stream is received accurately to the user despite the errors during the transmission. It controls the error during the transmission. To achieve it the protocol uses acknowledgements (messages sent by the receiver indicating that it has correctly received …

E-NodeB

The E- Node B is the only node for the E-UTRAN. If you have a slightest idea of any of previous telecom technologies like GSM, CDMA and/or  WCDMA , you might know that all the other RAN technologies used more than one node in the RAN environment. For example, in …

The WiFi alliance

The Wi-Fi Alliance is a trade association that promotes Wireless LAN technology and certifies products if they conform to certain standards of interoperability. Not every IEEE 802.11-compliant device is submitted for certification to the Wi-Fi Alliance, sometimes because of costs associated with the certification process. The lack of the Wi-Fi …

What is WiFi

Wi-Fi is a popular technology that allows an electronic device to exchange data wirelessly (using radio waves) over a computer network, including high-speed Internet connections. Technically speaking, The WIFI (802.11) is a subset of the IEEE 802, that refers to a family of IEEE standards dealing with local area networks …