18-06-2012, 11:41 AM
Enhanced Data Rates for GSM Evolution EDGE
Enhanced Data Rates.pdf (Size: 147.64 KB / Downloads: 50)
summary
The business of wireless data
is expected to grow in the region
of 100–200 % per annum
and the mobile communications
industry agrees that wireless
data services will form the
foundation for future business.
The enormous success of short
messaging in many countries
proves that people accept the
benefits of non-voice services.
EDGE
The GSM standard is being
developed to support mobile
services with radio interface data
rates even over 400 kbit/s.
This work is being performed
under the ETSI work item
EDGE (Enhanced Data Rates
for GSM Evolution).
The major change in the GSM
standard to support higher data
rates is the new modulation
system, known as 8PSK (Phase
Shift Keying). This will not
replace but rather co-exist with
the existing GMSK (Gaussian
Minimum Shift Keying)
modulation. With 8PSK, it is
possible to provide higher data
rates with a somewhat reduced
coverage, whereas GMSK
will be used as a robust mode
for a wide area coverage.
EDGE brings more
speed and capacity
when needed
In mature GSM markets, cellular
data penetration is forecast to
increase exponentially during
the early 2000’s. New wireless
data applications and innovative
terminal types will generate
completely new markets:
aggressive GSM operators can
expect to obtain up to 30 % of
their airtime and revenue from
wireless data by year 2000.
EDGE boosts
data rates
The Phase 1 EDGE standard,
scheduled to be complete in the
third quarter of 1999, will
contain both EGPRS and ECSD
services. EGPRS will be based on
the footprint of GPRS, whereas
ECSD will enhance the data rates
of HSCSD. It is expected that
packet data will dominate circuit
switched data in future GSM
data networks, calling for EGPRS
solutions with high flexibility
and spectral efficiency. Also,
the high data rate real time
services provided with ECSD are
seen as important for
applications such as video
retrieval and video telephony.
Enhanced Data Rates.pdf (Size: 147.64 KB / Downloads: 50)
summary
The business of wireless data
is expected to grow in the region
of 100–200 % per annum
and the mobile communications
industry agrees that wireless
data services will form the
foundation for future business.
The enormous success of short
messaging in many countries
proves that people accept the
benefits of non-voice services.
EDGE
The GSM standard is being
developed to support mobile
services with radio interface data
rates even over 400 kbit/s.
This work is being performed
under the ETSI work item
EDGE (Enhanced Data Rates
for GSM Evolution).
The major change in the GSM
standard to support higher data
rates is the new modulation
system, known as 8PSK (Phase
Shift Keying). This will not
replace but rather co-exist with
the existing GMSK (Gaussian
Minimum Shift Keying)
modulation. With 8PSK, it is
possible to provide higher data
rates with a somewhat reduced
coverage, whereas GMSK
will be used as a robust mode
for a wide area coverage.
EDGE brings more
speed and capacity
when needed
In mature GSM markets, cellular
data penetration is forecast to
increase exponentially during
the early 2000’s. New wireless
data applications and innovative
terminal types will generate
completely new markets:
aggressive GSM operators can
expect to obtain up to 30 % of
their airtime and revenue from
wireless data by year 2000.
EDGE boosts
data rates
The Phase 1 EDGE standard,
scheduled to be complete in the
third quarter of 1999, will
contain both EGPRS and ECSD
services. EGPRS will be based on
the footprint of GPRS, whereas
ECSD will enhance the data rates
of HSCSD. It is expected that
packet data will dominate circuit
switched data in future GSM
data networks, calling for EGPRS
solutions with high flexibility
and spectral efficiency. Also,
the high data rate real time
services provided with ECSD are
seen as important for
applications such as video
retrieval and video telephony.