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Wireless Data Technologies reference phần 4

NTT DoCoMo và Hewlett-Packard đã công bố rằng hai công ty cùng phát triển công nghệ truyền thông không dây 4G. Họ đã đặt tên cho nền tảng công nghệ: MOTO-Media. Ban đầu, DoCoMo đã lên kế hoạch để giới thiệu các dịch vụ 4G vào năm 2010. Mới đây, DoCoMo đã công bố kế hoạch giới thiệu dịch vụ 4G từ năm 2006, tức là bốn năm sớm hơn so với kế hoạch. | 56 IMODE NTT-DoCoMo and Hewlett-Packard have announced that the two companies are jointly developing technologies for 4G wireless communications. They have named the technology platform MOTO-Media. Initially DoCoMo planned to introduce 4G services around 2010. Recently DoCoMo announced plans to introduce 4G services from 2006 i.e. four years earlier than previously planned. 6.7.1 4G Data Rates in Japan At present the 2G iMode data rates in Japan are up to 9.6kbit sec but are usually a lot slower and 28.2 kbps for 504i handsets since May 2002 . For 3G FOMA data rates are at present around 200 kbps download and 64 kbps upload and may in the future be upgraded to 2 Mbit sec. For 4G data rates up to 20 Megabytes per second are planned. This is about 2000 times faster than present mobile data rates and about 10 times faster than top transmission rates planned in the final build out of 3G broadband mobile. It is about 10-20 times faster than standard ASDL services which are being introduced for Internet connections over traditional copper cables at this time. Of course it is impossible to predict technology developments and the evolution of culture and customer needs. 4G in principle will allow high-quality smooth video transmission. 6.8 Conclusion Therefore iMode is a combination of available technologies. Although CDMA and C-HTML are not distinguished technologies iMode proved that these technologies were enough to satisfy the needs of 6.5 million customers. They want a quick continuous connection to the Internet from anywhere anytime at reasonable costs though transmission speed is lower than their PC Internet connections. Moreover iMode is changing the information system of existing businesses. Customers no longer want to call somebody in an office. They need a direct contact to their sales representative and customized information that they can read with their smart phones. iMode demands that information managers change their system from the CEO s secretary to .