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Tokyo, May 21, 2002 - KDDI Corp., KDDI R&D Laboratories and Cisco Systems K.K. announced that they had successfully maintained data transmission between different wireless systems such as the CDMA2000 1x /1xEV-DO of IMT-2000 third-generation (3G) wireless communications system and Wireless LANs in a moving vehicle. This trial is the first time to succeed in maintaining IP-based seamless communications between 3G and Wireless LANs in a moving environment.
| 1.Trial Environment |
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In the trial, Cisco Systems established a wireless LAN hotspot system capable of high-speed data transmission at a maximum 11 Mbps within an area covered by KDDI's au 3G CDMA2000 1x cellular phone system, which is capable of transmitting data at speeds of up to 144 Kbps and CDMA2000 1xEV-DO (trial network), a wireless standard currently being tested and enables high-speed data transmission at up to 2.4 Mbps.
With this setup, the trial assumed a scenario in which application data is transmitted between a vehicle and the Internet. In the vehicle, a handset (CDMA2000 1x/1xEV-DO, cdmaOne)and a wireless LAN device were connected to a Cisco System's in-vehicle mobile router for use of Wide Area Network (WAN) links. A personal computer for applications and an IP camera were attached to an in-vehicle LAN which was called Mobile Network moving with the mobile router. It was verified that in this kind of operating condition, Mobile IP technology can be applied without affecting the existing network and communications devices, offering seamless transmission services in multiple wireless access media. |
| 2.Trial and Results |
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As a result of the tests, it was found that the communication system mentioned above could maintain connectivity and provide high-speed data transmission for the vehicle with the following services in all test patterns even when the vehicle passed through areas covered by different wireless network systems. |
- Contents download requeste from an in-vehicle computer
To simulate download maps, deliver video stream and audio files, and receive e-mail via remote access.
- Television telephone through IP communications between Mobile Networks
To simulate IP communication between vehicles. For example, TV telephones, real-time Internet games, chat rooms, etc.
Automatic contents push service from the Internet to information devices on specified Mobile Networks.
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| 3.Future Developments |
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From now, the companies involved will test the function of effective wireless link selection depending on different applications and the technical integration with fixed access networks. In order to cope with the needs of various mobile wireless users, they will also enhance the partnerships with companies in automobile industry and other affiliated industries, and continue to carry out tests for the development of a commercial model. |
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There will be demonstrations of this trial in the KDDI booth at the Tokyo Business Show 2002 from May 21 - 24 (May 21 and 22 are by invitation only) at the Tokyo Big Sight. |
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