NTT DoCoMo comes close to 5Gbps in 4G trial
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(InfoWorld) - NTT DoCoMo came close to hitting another data transmission milestone in its research into next-generation cellular telephone systems during an experiment conducted in Japan on Dec. 25 last year. The company, Japan's leading cellular carrier, managed to transmit data at close to 5GbpsÂ to a receiver moving at 10 kilometers per hour, said Yoshiki Kakuda, a spokesman for the Tokyo company. He said the company's public relations department didn't know the exact speed achieved but that it was close to the 5Gbps mark. About a year earlier NTT DoCoMo succeeded inÂ transmitting data at 2.5GbpsÂ and this time managed to double that by increasing the number of MIMO (multiple in multiple out) transmitting and receiving antennas from six to 12 each and using better signal processing in the receiver. MIMO involves sending data using multiple antennas to increase the total throughput. The result was a doubling in the amount of data transmitted in the same 100MHz chunk of radio spectrum. Details of the experiment will be detailed at next week's 3GSM World Congress in Barcelona, Spain. NTT DoCoMo has been working on what it calls 4G (fourth-generation) technology for close to 10 years but the technology remains some way from commercialization. The carrier had previously said it plans to launch 4G in Japan around 2010 but recently indicated it plans to wring more speed out of its WCDMA (Wideband Code Division Multiple Access) 3G network before switching to a new technology. The carrier plans to launch a "Super 3G (third-generation)" service around 2010 that will offer data transmission at around 100Mbps. When NTT DoCoMo launched its 3G network in 2001, it could carry data at 384Kbps but that was recently raised to 3.6Mbps with the launch of an upgrade called HSDPA (high-speed downlink packet access). Carriers in other countries are also deploying the faster technology on their networks.
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TOKYO : Japan&#39;s top mobile operator NTT DoCoMo believes Europe will embrace hi-tech telephones and expects a major boost in subscribers on the continent of its i-mode Internet service.
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The technology promises download speeds of 1 to 1.5 MB per second, reaching peaks of up to 3.2 MBps. So far, Cisco, IBM and Nortel, all major sources of equipment to telecom service providers worldwide, have
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Japan&#39;s top cell phone operator NTT DoCoMo Inc. and major British mobile carrier mm02 plc reached an agreement that will allow mobile telephone users in Britain, Germany, and Ireland to surf the Internet on the handsets, DoCoMo said Tuesday.
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Japan&#39;s NTT DoCoMo has released a dual-mode phone that works on both 3G FOMA cellular networks and wireless local area networks.
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NTT DoCoMo, Japan's dominant mobile operator, is planning to offer combined fixed and mobile services to business and residential customers. It is the latest sign of growing global interest in convergence between the two technologies.
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The mobile broadband network would be designed to run more than five times faster than current wireless networks at a lower cost.
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NTT DoCoMo, Japan&#39;s top mobile-phone carrier, and Motorola Inc., the world&#39;s No. 2 cell-phone maker, plan to develop a next-generation mobile phone that subscribers in Japan can also use while traveling in
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NTT DoCoMo, Japan's biggest mobile carrier, is to spearhead the rollout of an advanced version of its 3G (third-generation) services called Super 3G, a company spokesman said Wednesday.
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NTT DoCoMo Inc. has embarked on a month-long experiment of a Super 3G (third-generation) cellular system.
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DSL at 3mbps debuts in areas within company's existing footprint.
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(InfoWorld) - NTT DoCoMo will partially fund the construction of AT&T's 3G phone network in Hawaii, it said Thursday. The unusual agreement will see NTT DoCoMo, Japan's largest cellular carrier, provide AT&TÂ with $24 million to help it build the network. The network will be based on WCDMA (Wideband Code Division Multiple Access) and AT&T will launch service on the island of Oahu late this year and statewide in 2008, NTT DoCoMo said in a statement. Hawaii is a major holiday destination for Japanese tourists but most NTT DoCoMo customers can't use their cellphones on the island. That's because the carrier's 2G handsets are based on a proprietary standard used only in Japan and because in most 3G phones it has left out GSM (Global System for Mobile Communications) compatibility leaving only 3G for overseas roaming. Because the proprietary 2G format kept many previous handsets offline many consumers aren't used to it and don't look for it when buying a new handset. Although that's slowly changing as more experience the convenience of using their phone overseas for the first time. NTT DoCoMo said it will work with AT&T to promote roaming in the U.S. as a result of the deal. Last year NTT DoCoMo made another investment in the Pacific when it acquired Guam Cellular & Paging and then used that company to acquire Guam Wireless Telephone Company. The investments, which totaled about $72 million, were made to speed up the introduction of WCDMA on Guam and help its roaming business. Guam is another major tourist destination for Japanese people.
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Acreo, a leading Swedish research and development institute operating the National Broadband Test-bed, is using Mintera's platform to integrate 40 Gbps wavelengths on a 2.5 Gbps line system over 820 km of ...
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DoCoMo in collaborazione con Fujitsu ha prodotto un prototipo di batteria alimentata a metanolo per telefoni cellulari 3G. PoichÃ¨ il grande problema della diffusione delle telefonia di massa dei telefoni
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Japan&#39;s top mobile carrier has begun marketing a cell phone that can make Internet calls over Wi-Fi wireless networks in addition to regular ones.
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No sooner than weâve all got used to the idea of 3G services in the UK, mm02 has teamed up with NTT DoCoMo to allow 02 to launch the I-mode internet service in Britain, Germany and Ireland.
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La collaborazione tra NTT DoCoMo e Fujitsu ha portato allo sviluppo del primo cellulare 3G dotato di batteria a combustibile. Grazie alla innovativa tecnologia i telefonini UMTS potranno avere unâ autonomia