Overview
CDMA450 is a TIA-EIA-IS-CDMA2000 (CDMA-MC) system deployed in 450 MHz which
includes a family of standards developed by 3GPP2, published by TIA and approved
by ITU for IMT-2000: CDMA2000 1X, CDMA2000 1xEV-DO and CDMA2000 1xEV-DV. Currently,
CDMA2000 1X and CDMA2000 1xEV-DO are commercially available for the 450 MHz
band and CDMA2000 1xEV-DV is being developed.
Advantages of CDMA450
CDMA450 advantages derive from the spectral efficiency and high-speed data
capabilities of CDMA2000 and the expanded coverage afforded by a lower frequency
band.
- CDMA450 provides a larger cell size compared to cell sizes in other
bands, which translates to fewer cell sites and significantly lower capex
and opex to service vast coverage areas
- CDMA450 offers IMT-2000 services:
high-quality voice and high-speed data access
- CDMA2000 1X allows for voice
capacity of up to 20 erlangs per sector/carrier
- CDMA2000 1X supports high-speed
data up to 153 kbps and CDMA2000 1xEV-DO offers broadband access up to
2.4 Mbps
- Clear evolution path to advanced 3G services
- CDMA450 requires only a small
amount of spectrum (1.25 MHz), a significant consideration for NMT450 operators
who have 4-5 MHz allocated to
them
- CDMA450 allows for a phased evolution
450 MHz Band Allocation - Worldwide
CDMA450
offers a solution for multiple markets
- Evolution of Existing NMT-450 Systems to IMT-2000: A number
of operators in Eastern/Central European countries, Russia and South East
Asia are using the 450 MHz band to provide wireless services with first generation
analog equipment, based on the Nordic Mobile Telephone (NMT) standard. Many
of these operators are digitizing and upgrading their current networks using
IMT-2000 technologies. CDMA450 is the only technology commercially available
to these operators which allows direct transition from a first generation
system to next generation services. CDMA450 is also one of the few technologies
that fits into 4-5 MHz of spectrum (requires 2 x 1.25 MHz for a single channel;
can fit 3-4 CDMA450 carriers depending on the size of guard bands)
- Universal Services: Providing access to communication
services (voice and Internet access) is a key priority for governments and
regulators around the world, especially in developing countries. Coverage
advantages of lower frequency bands offer a cost-effective solution to meet
these goals. Due to the favorable propagation characteristics of lower frequencies
and their associated coverage benefits, there may be significant cost advantages
associated with deploying a wireless system in the 450 MHz band.
- High Speed Mobile or Fixed Data Services: The 450 MHz
band can be utilized to provide broadband access for mobile or fixed data
users. Many countries have indicated a need to serve their public safety
communication markets to provide blue light services that include, group
communication, high-speed data access, push-to-speak, video streaming and
dispatch services. Some countries are also investigating the use of a high-speed
data network to provide broadband access to schools, hospitals and businesses.
These networks could be seen as complementary to other cellular-based networks
and could be employed in either a fixed, portable or fully mobile setting
depending on the application.
CDMA450 Deployments
Services
based on IMT-2000 technologies (CDMA2000) are commercially deployed in 450
MHz in Europe and Asia.
CDMA450 Products
Infrastructure and device solutions are commercially available
- Leading equipment
manufacturers, including Airvana, AirWalk Communications, Inc., Alcatel Lucent, Huawei, Nortel, QUALCOMM,
and ZTE,
have IMT-2000 solutions for the 450-470 MHz band
- A broad range of handsets with advanced functionality
is available
- Provide access to voice and data services: color screens,
polyphonic sound, downloadable ring tones, BREW, Java, push-to-talk,
removable user
interface
modules (R-UIM/SIM), GPSOne, SMS services
- Manufacturers: AnyDATA, Axesstel,
Compal, Curitel,
Giga Telecom, GTRAN
Wireless, Hantel,
Huawei, Hyundai
Syscomm,
RWT, Synertek, Topex, Ubiquam, ZTE
