WiBro

WiBro (Wireless Broadband, Korean: 와이브로, IEEE 802.16e, mobile WiMAX) is a standard for wireless communication that has been developed by the South Korean telecommunications industry. In February 2002, the responsible authority licensed 100 MHz in the 2.3 GHz band. The end of 2004 was standardized phase 1 of WiBro by the Korean TTA ( Telecommunications Technology Association ).

WiBro is star-shaped organized and allows a theoretical data throughput of 30 to a maximum of 50 Mbit / s within a radius of 1-5 km around the base station. As with many standards for wireless data transfer, the link quality can be increased at the cost of transmission speed. This uses as the uninterrupted transmission of video streams.

Two Korean telecom company (KT, SKT ) offer since June 2006 for $ 30 / month such a service.

Radio Technical types of transmission

The method of the IEEE 802.16e -2005 for frequencies 2-6 GHz

The new IEEE 802.16e-2005 is specified, in addition, a radio transmission method for a technical frequencies up to 6 GHz. This is the so-called SOFDMA in which account the quality of the transmission path and the computing power of mobile devices can be worn. This is done by an additional splitting of the frequency spectrum to different recipients and by changing the modulation of the subcarriers. In addition, the IEEE 802.16e - 2005 provides the ability to switch the radio cell during operation (handover). IEEE 802.16e -2005 is not an extension of the IEEE 802.16 -2004- standards but incompatible to it.

Spectral efficiency

For a 10 MHz channel 802.16e -2005 ( Mobile WiMAX ) is obtained for the IEEE in a breakdown of the frequency band in the ratio of 3 to 1 for receiving and transmitting a maximum data reception rate for all terminals together of 46 Mbit / s All terminals can while still simultaneously with up to 4 Mbit / s over the same 10 MHz channel send data. The data rates specified rely forward MIMO technology. , The spectral efficiency is thus higher than with the UMTS HSDPA extension.

History

In November 2004, a compatibility of WiBro was agreed to WiMAX by representatives of the companies Intel and LG Electronics.

In early 2005 joined the company SK Telecom and Hanaro Telecom a partnership to build a nationwide WiBro infrastructure that aim to complement the planned regional networks in Seoul and six other provincial cities.

End of 2005, WiBro has been standardized by the ITU as IEEE 802.16e, mobile WiMAX.