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5
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). The following table lists
some major CDMA Standards.
TSB -74: Protocol between an IS-95A system and
ANSI J-STD-008
1xRTT system receives subscribers in wireless
section twice as much as IS-95. Its battery life is twice
as long as IS-95. High-speed data transmission is
also possible.
CDMA Standard
Basic air interface
Network
Service
Performance
Designator
TIA/EIA/IS-95-A
ANSI J-STD-008
TIA/EIA/IS-634
TIA/EIA/IS/651
TIA/EIA/IS-41-C
TIA/EIA/IS-124
TIA/EIA/IS-96-B
TIA/EIA/IS-99
TIA/EIA/IS-637
TIA/EIA/IS-657
TIA/EIA/IS-97
TIA/EIA/IS-98
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
Description
Protocol between MS and BTS for Cellular & AMPS
Protocol between MS and BTS for PCS
MAS-BS
PCSC-RS
Intersystem operations
Nom-signaling data comm.
Speech CODEC
Assign data and fax
Short message service
Packet data
Cellular base station
Cellular mobile station
PCS personal station
PCS base station
Speech CODEC
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SUBJECT
The VX1 phone has been designed to operate on the
latest digital mobile communication technology, Code
Division Multiple Access (CDMA). This CDMA digital
technology has greatly enhanced voice clarity and can
provide a variety of advanced features. Currently,
CDMA mobile communication technology has been
commercially used in Cellular and Personal
Communication Service (PCS).
The difference between them is operating frequency
spectrum. Cellular uses 800Mhz and PCS
uses
1.9Ghz. The VX1 operates on both frequencies, this is
called a dual-mode phone. Also, the VX1 works on
Advanced Mobile Phone Service (AMPS). We call it a tri-
mode phone. If one of the Cellular, PCS or AMPS base
stations is located nearby,
call fail rate of a tri-mode
phone is less than a dual-mode phone or a single-mode
phone.
CDMA technology adopts DSSS (Direct Sequence
Spread Spectrum). DSSS enables the phone to keep
communication from being crossed and to use one
frequency channel by multiple users in the same
specific area, resulting in a 10 fold increase in capacity
when compared with the analog mode currently used.
Soft/Softer Handoff, Hard Handoff, and Dynamic RF
power Control technologies are combined into this
phone to reduce call interruptions.