08-16-2017, 10:05 PM
WiBro (Wireless Broadband) is a wireless broadband Internet technology developed by the South Korean telecoms industry. WiBro is the South Korean service name for IEE 802.16e (mobile WiMAX) international standard. WiBro adopts TDD for duplexing, OFDMA for multiple access and 8.75 MHz as a channel bandwidth. It was designed to overcome the data rate limitation of mobile phones (for example CDMA 1x) and to add mobility to broadband Internet access. 100 MHz of electromagnetic spectrum in the 2.3 - 2.4 GHz band was allocated by the korean govt. WiBro base stations will offer an aggregate data throughput of 30 to 50 Mbit/s per carrier and cover a radius of 1 5 km allowing for the use of portable internet usage.it will provide mobility for moving devices up to 120 km/h . The technology will also offer Quality of Service. The inclusion of QoS allows for WiBro to stream video content and other loss-sensitive data in a reliable manner. many countries are trying to commercialize this Mobile WiMAX (or WiBro).
http://en.wikipediawiki/Wibro
WiBro System Specification
It is is based on a subset of IEE 802.16 standard. WiBro specifies a
communication channel of 9MHz bandwidth, in a frequency range of 100MHz frequency
bandwidth from 2.3GHz to 2.4GHz. WiBro system only adopts Orthogonal
Frequency Division Multiple Access (OFDMA) in Time
Division Duplex (TDD) mode. The TDD frame length is 5 msec,
and is segmented into the sequence of small fixed-duration
logical units, called symbols. The frame structure is fixed as 27
symbols for the downlink subframe and 15 symbols for the uplink subframe.
report:
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