Japanese Govt. Approves Licenses, Frequencies for 3G Cell Phones
nikkeibp.asiabiztech.com
July 4, 2000 (TOKYO) -- The Ministry of
Posts and Telecommunications on June 30
issued preliminary licenses authorizing cellular
phone companies to install fixed base stations
and operate moveable ground stations
(telephones) for the next-generation,
IMT-2000 mobile phone service.
The ministry issued further permits to the
companies -- NTT DoCoMo Inc., J-Phone
Inc. and an alliance of IDO Corp. and DDI
Corp.'s Cellular Group companies -- allowing
them to change their operations so they can offer
IMT-2000 services.
The mobile phone operators will now start
building base stations and networks and
intensify preparations for the advanced service.
The license approvals also revealed the
frequencies allocated to each operator. For
terminal-to-station links, a frequency range of
1,920-1,980MHz was assigned, divided into
three 20MHz-wide bands with the IDO/DDI
Cellular group receitting the lowest band, NTT
DoCoMo the next one and J-Phone the top end.
For station-to-terminal links, a frequency range
of 2,110-2,170MHz was allotted, again in
20MHz bands, with the lowest to highest
assigned in the same order.
"The frequency allocation was decided on the
basis of efficient use of frequencies, while taking
applicant requests into account," a telecom
ministry official.
Within each 20MHz band, only a 15MHz-wide
range can be used. A 1,920-1,925MHz buffer
zone was designated to avoid radio interference
with PHS mobile phones which use a frequency
range immediately below 1,920MHz. The
mobile phone providers need to develop
technology to prevent radio interference between
PHS and IMT-2000 services to fully exploit the
20MHz blocs.
Related stories:
DDI, IDO to Use 1X, HDR Technologies for
IMT-2000 Services
nikkeibp.asiabiztech.com
J-Phone Applies to MPT for IMT-2000
License
nikkeibp.asiabiztech.com
NTT DoCoMo to Launch Next-Generation
Mobile System in May 2001
nikkeibp.asiabiztech.com
(Nikkei Communications) |
