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8 VX3400
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mode or singlemode phone.
CDMA technology uses a feature called DSSS
(Direct Sequence Spread Spectrum) that enables
the phone to keep communication from being
crossed and to use one frequency channel by
multiple users in the same specific area. This
results in a 10-fold capacity increase when
compared with analog mode. In addition, features
such as soft / softer handoff, hard Handoff, and
dynamic RF power control technologies combine
to reduce call interruptions.
The Cellular and PCS CDMA networks consist of
MSO (Mobile Switching Office), BSC (Base Station
Controller), BTS (Base Station Transmission
System), and MS (Mobile Station).
*
TSB-74: Protocol between an IS-95A system and
ANSI J-STD-008
1xRTT system receives twice as many
subscribers in the wireless section as IS-95.
Its battery life is twice as long as IS-95.
The following table lists some major CDMA
standards.
CDMA
Standard
Basic Air
Interface
TIA/EIA-95A
TSB-74
ANSI J-STD-008
TIA/EIA-IS2000
ANSI TIA/EIA 553A
CDMA Tri-Mode Air Interface
14.4kbps radio link protocol and
inter-band operations
IS-95 adapted for PCS frequency
band
cdma2000 1xRTT AirInterface
Advanced Mobile Phone Service
MAS-BS
PCSC-RS
Intersystem operations
Non-signaling data comm.
Cellular base station
Cellular mobile station
PCS personal station
PCS base station
Speech CODEC
TIA/EIA/IS-634
TIA/EIA/IS/651
TIA/EIA/IS-41-C
TIA/EIA/IS-124
TIA/EIA/IS-97
TIA/EIA/IS-98
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
TIA/EIA/IS-96-B
TIA/EIA/IS-637
IS-801
Speech CODEC
Short message service
Position Determination
Service (gpsOne)
Network
Service
Performance
Designator Description
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