Babblefish translation one more time.
We also should otherwise develop CDMA (1)
" Chinese computer newspaper " in Li 2001-03-05 09:46:15
After CDMA passes through several twists and turns, finally starts off
again...
Center the League of Nations passes the CDMA network construction,
the fermentation already long time, receives everywhere attention. This
item arrangement stage the and so on resources investigation work
officially has yesterday started. Within this year this network must
complete covers national 200 above important cities, network scale
amounts to above 13300000 households. Center the League of Nations
passes the expression, must cause it to become in world most greatly
best CDMA network.
But facing is turbulent but to the 3g big tide, the very many people
unable to restrain to have to ask, this CDMA was not comes the late
spot? We now also have the necessity develop it?
The CDMA technology although is born comparatively late, but
because in technology has uniquely place, in North America, South
America and Korea obtained the widespread use. These technical
superiority mainly display in the frequency spectrum use factor are high,
the capacity are big, cover and so on the characteristic broadly, may
massively reduce invests and reduces the operation cost, deeply favours
for the operation business. Moreover, the CDMA handset emissive
power is low, has fine reputation the green handset, in the people
generally worries the handset electromagnetic radiation influence good
health under the situation, lets the user 心动. But, the CDMA network
and the GSM network with is 2 generation of technical the narrow band
networks, within 3 years face to 3 generation of networks
transformations, if the association passes cannot in short-time inside
attract the enough many users, then faces takes back with difficulty
invests to awkward 境地.
Uses the limited frequency resources
While our country mobile communication market high speed expansion,
should fully consider and treasure the frequency resources which mobile
communication Lai Yi survives. But, the frequency is the special
resources which cannot be regenerated. Although says from the logic,
we may do not have the limit to the high end development frequency
resources, but, 通信ç†è®º tells us, the frequency is higher, the economical
price is bigger, the technology is difficult to go past high, and holds true
by thinks this kind of growth is one kind of non-linear growth relations.
We should in no way in under the not full value present frequency band
spectrum efficiency situation, how also discusses develops and uses the
new frequency band.
Said, today one technical service pattern difference root is how uses
precious frequency resources question. Similarly is the voice service
which serves for one user, uses 800MHz the frequency band the second
generation of CDMA system price without doubt is lower than uses
2gHz the frequency band the third generation CDMA system price, this
is the technical fact which does not struggle. Our any reason has not
thought our country mobile communication the first 80000000 users
(account for total population 6%) the main use voice service, provides
the service by the second generation of system, but the later previous
hundred million several hundred million users actually mainly will even
be supposed take the data and the multimedia service as the focus, will
provide the service by the third generation system. The motion user
needs the service type is not possible by the age division. In from now
on the quite long time, the overwhelming majority migration user's
motion business volume mainly will be the voice service. The
telecommunication industry until now more than 100 years still did not
have the change from the telephone invention take the voice service as
the mainstream, this as if how many to our some enlightenment.
In order to open the operation market preparation
The operation market opening is the question which now the
telecommunication most cares about. Supposed the operation market
foreign opened, at the appointed time if motion user completely locates
one or in two GSM net, inevitably will cause our country CDMA
research development and the industry loses the market demand
stimulates develops slowly. Even if is China develops oneself the third
generation system to 2003, also is is unable with the overseas process
long-term research and has the rich operation experience the system
directly contends with.
Under this kind of situation, once the operation market is open, the
overseas strength formidable operation business certainly can use their
advanced CDMA system rapidly to unfold in China one huge CDMA
net, but by now our CDMA system commercial also was at the primary
stage. Therefore, may imagine, by now our country mobile
communication user market will basically is seized by the overseas
operation business, buys in in 2003 later the nearly all motion user. At
the same time, our country GSM user will have the possibility gradually
" jumps the net ", the GSM user had on the possibility flower several
hundred Yuan even several ten Yuan turns the overseas CDMA
operation business user, specially the month speech spent in 500 Yuan
above big è¯åŠ¡é‡ user. Overseas already had even several American
dollars in this aspect enters the net the instance. Specially is worth
paying attention, because the CDMA technical superiority (for instance
under same service area radius condition, CDMA handset average
emissive power far is lower than the GSM handset), therefore may
forecast, will change the CDMA system from the GSM system " jumps
the net " the user is one batch of business volumes big households, will
have the substantive influence to the GSM operation business income.
If we now develop the CDMA market, opens after the operation market
cannot occupy only has GSM the passive aspect, moreover studies the
development and the system domestic product to our country is the
powerful market impetus.
In the near future still take the voice service as heavy
The third generation with the second generation of mobile
communication system service main difference is the support high
speed data airborne connection channel, 从ç†è®ºä¸Šè®², may provide the
speed reaches as high as 2mbps, such as the multimedia service and the
Internet service service. But these two kind of services, at present the
not full reason thinks will be the future mobile communication main
service. |
