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Japan has launched a satellite that is able to provide high-speed Internet connections to homes and offices at speeds rivaling those of today's fiber optic connections.
The satellite launched Saturday, called Kizuna, is part of the government's e-Japan project and its modest aim is the creation of the world's most advanced information and telecommunications network.
It will be able to provide broadband Internet connections to homes with download speeds of up to 155Mbps and upload speeds of 6Mbps. The services will be delivered via 45-centimeter dish antennas, which are about the same size as those used for digital direct-to-home (DTH) satellite TV services in many countries.
Even faster connections at download speeds of around 1.2Gbps will be offered to commercial users via 5 meter antennas.
There are two antennas on the satellite, one serving Japan and one aimed at the Asia Pacific region as a whole. These multibeam antennas efficiently divide up the satellite's signal into multiple beams so the limited frequencies available can be reused in many different areas.
To help route signals between beams the satellite carries an Asynchronous Transfer Mode (ATM) switch onboard.
The domestic Internet services will be primarily aimed at rural areas that are not served by fiber-optic Internet services.
Fiber Internet connections are pervasive in built-up areas of Japan and a 100Mbps connection costs around $40 per month, but in rural areas slower DSL connections are typically as fast as the Internet gets.
The satellite will also serve as an Internet back-up network should terrestrial communications be disrupted by a major earthquake.
The satellite's Asian beam will be used to provide high-speed Internet connections between Japan and other nations in the region, the Japan Aerospace Exploration Agency and the National Institute of Information and Communications Technology said in a joint statement.
The launch from Japan's Tanegashima Space Center, delayed from earlier in February, took place at 5:55 p.m. local time (8:55 a.m. GMT) on Saturday.
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Comments (2)
high speed internetBy Brett on February 28, 2008, 5:55 amAmazing!The japan government has become more faster in providing high speed internetwith the launch of the satellite that is able to provide high-speed Internet...
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RE: Japan launches high-speed Internet satelliteBy Anonymous on February 26, 2008, 10:53 amSince the article stated a single satellite, it must be geosynchronous. As such it is high, which means a significant propagation delay. Any word from the Japan...
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