Looks like they are working on 3.5g and 4g trials parallel.
Anyone knows the spectrum used by 3.5G and 4G tests
As far as I know is a much wider spectrum
that 2.5g and 3g networks and this could prove
to be a problem in the future.
Anyway 3g in expected reach maturity in Japan by 2005-2006
i do not know if makes any sense (For US) in considering 4g
Here is Ntt DoCoMo press:
NTT DoCoMo to Conduct Field Trial of 4G Mobile
TOKYO, JAPAN, May 28, 2003 --- NTT DoCoMo, Inc.
announced today plans for a field trial of a fourth-
generation (4G) mobile communications system in
Yokosuka, Kanagawa Prefecture, where a DoCoMo
R&D center is located.
DoCoMo has been conducting research on 4G mobile
communications technology since 1998. In indoor
experiments announced last October, DoCoMo's
4G system demonstrated maximum information
bit rates of 100 Mbps for the downlink and 20 Mbps
for the uplink.
The field trial announced today is DoCoMo's next step
toward the development of practical 4G technologies,
as well as a further contribution by the company toward
the establishment of a 4G global standard, which is now
being discussed by the International Telecommunication
Union's Radiocommunication Sector. (ITU-R).
DoCoMo will evaluate the following high-speed
transmissions technologies during the field trial:
Effective packet transmission methods
Adaptive modulation and channel coding scheme
Adaptive retransmission control
Adaptive beam forming based on predicted direction of arrival
Luned=EC, 26 mag 2003, alle 14:46 Europe/Rome, Nick May ha scritto:
> Herald Tribune article here:
> NTT DoCoMo Inc., the Japanese company that introduced the first
> third-generation digital mobile phone service in the world, is =20
> to pioneer wireless services that are at least 40 times as fast.
> A technology called HSDPA , for high-speed downlink packet access, =
> known as 3.5G, is expected to deliver data at as much as 14.4 megabits =
> second , allowing users to browse Web pages faster on their cell =
> than broadband users can do today on their personal computers. Such =20=
> will also make video streaming and the downloading of MP3 music files
> easier on mobile phones.
> DoCoMo last month ordered mobile simulators for the testing and =20
> of HSDPA from UbiNetics Ltd .in Cambridge, England, that specializes =
> wireless test and measurement equipment.
> HSDPA uses some of the advantages of W-CDMA, or wideband code division
> multiple access, the technology upon which many 3G services will be =20=
> But HSDPA is much faster than 3G because it uses a more efficient =20
> slashdot link/comments here:
> This mail was sent to address giovanni.bertani_at_exsense.com
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Received on Wed May 28 16:41:28 2003