Home
2008:
January
February
March
April
May
June
July
August
2007:
January
February
March
April
May
June
July
August
September
October
November
December
2006:
January
February
March
April
May
June
July
August
September
October
November
December
2005:
January
February
March
April
May
June
July
August
September
October
November
December
2004:
January
February
March
April
May
June
July
August
September
October
November
December
2003:
January
February
March
April
May
June
July
August
September
October
November
December
2002:
January
February
March
April
May
June
July
August
September
October
November
December
2001:
January
February
March
April
May
June
July
August
September
October
November
December
2000:
April
May
June
July
August
September
October
November
December

(keitai-l) Re: cdma2000 1x vs W-CDMA

From: wimjam <wimjam_at_gmx.co.uk>
Date: 12/03/02
Message-ID: <3DEC78EF.7010908_at_gmx.co.uk>
This is true about the Docomo research facilities.... during the initial 
RFQ process for the vendors they requested bare boxes (HW) from the 
suppliers... they would hack the for the SW together themselves...
Currently I believe Docomo is teaming up with Ericsson, NEC and probably 
Fujitsu...
for the J-Phone network this is Ericsson (again), NEC (again) and 
Nokia... (I might be missing somebody here)(and note NEC is moving 
because Ericsson fails to get its kit ready).Further their network will 
be R99 compliant. but expect a lot of interoperability problems here as 
the SW is developed seperately (each vendor with their own 
interpretation of the standard), while Docomo had the honours of doing 
it themselves...

About the data service technology. I wouldnt expect big discrepencies, 
because Docomo (again having a lot of money helps), is pushing for WAP 
2.0 = next generation i mode... So both of them would be merging towards 
 a common standard (with the best and the worst of WAP and i mode).

I guess it will really be interesting game to watch.


w.
Ken Chang wrote:

>the J-Phone IMT network is very different from FOMA.
>
>first FOMA is not only an old version of R99 but also there are a lot
>of DoCoMo proprietary specs to breach the standard.  this is because
>both their nature (DoCoMo has larger research facilities than many
>manufacturers that making strange things is a key activity for budget
>and ... its own existence), and their lack of experience of the GSM
>network (there are more things you have to know than reading 3GPP
>documents).  so the FOMA network is more expensive and difficult to
>upgrade.
>
>J-Phone IMT network is implemented using cheap and relatively low
>performance Ericsson equipment, only 64 kb/s packet data (expandable
>to 128 kb/s).  it's easier for J-Phone to rollout the 3G network at
>a much faster speed than DoCoMo (early fat bird).  J-Phone IMT's
>trial network is way better than DoCoMo a year ago, and will surpass
>FOMA next year.
>
>another thing that make big difference is that DoCoMo has an old data
>service technology - the i-mode.  I don't know when and how they will
>upgrade and move on to WAP/OMA.  it's a difficult task, but I don't
>think they can afford not.  J-Phone, on the other hand have already
>WAP for PDC and it's a relatively easy job for them.
>
>Vodafone certainly won't have to go the same learning curve as DoCoMo,
>though I cannot say if they won't run into other troubles.
>
>about handset chipsets, NEC's first chipset (also used by Panasonic)
>is poorly designed.  Toshiba's first one (in T2101V) is better but
>NEC's new chipset (N2051, P2102V) is quite improved with less power
>consumption (150 hrs max stand-by).
>
>but the real culprit is the W-CDMA design, which complicates handset
>processing and requires higher power consumption.  Qualcomm provides
>chipsets for both FOMA and J-Phone IMT handsets (Sharp & Sanyo).
>it's good for small manufacturers to enter the market.
>
>cheers,
>
>Ken
>
>
>_________________________________________________________________
>Help STOP SPAM with the new MSN 8 and get 2 months FREE*  
>http://join.msn.com/?page=features/junkmail
>
>
>This mail was sent to address wimjam_at_gmx.co.uk
>Need archives? How to unsubscribe? http://www.appelsiini.net/keitai-l/ 
>
>
Received on Tue Dec 3 11:35:35 2002