| Naohisa Hamaguchi | Mobile Development Project, |
| Takashi Kagei | Software Dept., Carrier Network Systems, |
| Shiro Mazawa | Mobile Development Project, |
| Yosuke Takahashi | CDMA Development Dept., |
The technical standards for attaining "BCMCS (broadcast and multicast services)" with accompanying guaranteed QoS levels on a 1xEV-DO 3rd-generation mobile communication system—providing wireless data transmission at a maximum rate of 2.4 Mbit/s—have been stipulated by the 3GPP2 standardization body. By adding this standardization to our already developed 1xEV-DO system, Hitachi has implemented BCMCS and QoS functions with its mobile telephony services. A trial 1xEV-DO system with these functions has been delivered to KDDI CORPORATION and tested under an experimental environment. With these additions of BCMCS and QoS functions, along with providing unicast transmission, this 1xEV-DO system is expected to provide services such as simultaneous data transmission and broadcasting as well as IP-videophone.
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Hitachi Communication Technologies, Ltd. (Japanese Only) |
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The Hitachi Hyoron (Japanese Only) |
1xEV-DO, BCMCS, QoS, RAN
