Millimetre-wave signals can pack in much more data than can current lower-frequency radio signals. The flipside is the smaller area of coverage, a flaw that CRL's street cell concept is designed to address. Fujise said millimetre-wave technology need not replace wireless standards like 802.11a and 802.11b, as they can all coexist. He expects such ultrahigh-speed vehicle communications systems to appear in test cars in about three years. CRL and its Singapore partners will also work on cellular technology that goes beyond the current 3G, or third-generation framework defined by the International Telecommunication Union -- in other words, 4G. While this 4G mobile network promises video conferencing and high-speed Internet access, the most important change is that its next-generation handsets can adjust to suit a person's needs. "A user could be downloading a movie clip at lower data rates using the cellular network, but when he moves into a wireless hot spot, the download automatically kicks into higher gear -- all this switching is transparent," said Fujise. The development of software defined radio (SDR) applications is the key, he said. Many see software radios -- which can mimic any kind of wireless standard using only programs stored in memory -- as the answer to the problem of incompatible wireless networks. "Right now, the software inside a mobile phone is configured to access only the cellular network. But with SDR, the software algorithm can be tweaked to allow interoperability between different wireless networks," Fujise said. In Singapore, CRL is working with the Institute for Infocomm Research, a government-funded technology research body, as well as Nanyang Technological University. Singapore is not CRL's first destination for overseas expansion. The Japanese research institute also established its Asia Research Center and a Thai Computational Linguistics Laboratory in Bangkok, Thailand, last year. CNETAsia's Winston Chai reported from Singapore.
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