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WiBro (Wireless Broadband) is a wireless broadband Internet technology developed by the South Korean telecoms industry. WiBro is the South Korean service name for IEEE 802.16e (mobile WiMAX) international standard. By the end of 2012, the Korean Communications Commission intends to increase WiBro broadband connection speeds to 10Mbit/s, around ten times the current speed, which will complement their 1Gbit/sec fibre-optic network.〔(Koreans will get a gigabit per second broadband connection )〕 WiBro adopts TDD for duplexing, OFDMA for multiple access and 8.75/10.00 MHz as a channel bandwidth. WiBro was devised to overcome the data rate limitation of mobile phones (for example CDMA 1x) and to add mobility to broadband Internet access (for example ADSL or Wireless LAN). In February 2002, the Korean government allocated 100 MHz of electromagnetic spectrum in the 2.3–2.4 GHz band, and in late 2004 WiBro Phase 1 was standardized by the TTA of Korea and in late 2005 ITU reflected WiBro as IEEE 802.16e (mobile WiMAX). Two South Korean Telcom (KT, SKT) launched commercial service in June 2006, and the tariff is around US$30. WiBro base stations 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. In detail, it provides mobility for moving devices up to 120 km/h (74.5 mi/h) compared to Wireless LAN having mobility up to walking speed and mobile phone technologies having mobility up to 250 km/h. From testing during the APEC Summit in Busan in late 2005, the actual range and bandwidth were quite a bit lower than these numbers. 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. These all appear to be (and may be) the stronger advantages over the fixed WiMAX standard (802.16a). Some Telcos in many countries were trying to commercialize this Mobile WiMAX (or WiBro). For example, TI (Italy), TVA (Brazil), Omnivision (Venezuela), PORTUS (Croatia), and Arialink (Michigan) provided commercial service at some stage. While WiBro is quite precise in its requirements from spectrum use to equipment design, WiMAX leaves much of this up to the equipment provider while providing enough detail to ensure interoperability between designs. ==Current service== In Korea, KT (Korea Telecom) offers Wave 2 (18.4 Mbit/s, 4 Mbit/s) for 10000 KRW/mo (around $11 or €6.50) with 10 GB data usage to 40000 KRW/mo with 50 GB data usage plus free access to their own WiFi hotspots, ollehWiFi. The service coverage is advertised as nationwide, but actual coverage is restricted to every city, some railroad station, airports, and major highways. SK Telecom also offers Wave 2 WiBro Service for $18.87 a month with 30 GB data usage. Actual service coverage is limited mostly to major cities and highways. For short term visitors, (KT ) rents WiBro modem and bridge at KT Roaming Center in Incheon International Airport. As of October 2012, WiBro-only USB modem costs 5,000 KRW per day plus 100,000 KRW deposit, WiBro-HSPA USB modem and WiBro Egg cost 8,000 KRW per day plus 150,000 KRW deposit. One-day rent is free at KT Roaming Center, and requires credit card and passport. In India, Tikona Digital Networks (Independent services provider) offers WiBro service for up to 2 Mbit/s and 4 Mbit/s in many cities. The 2 MBit/s unlimited monthly plan costs Rs. 999.00 (roughly $21). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「WiBro」の詳細全文を読む スポンサード リンク
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