Technical Manual
Airbridge BTS3606A CDMA Base Station
System Description
Chapter 1 Introduction
1-1
Chapter 1 Introduction
The mobile communication system has experienced the first generation (analog
system) and the second generation (digital system).
As one of the main development trends of the second generation, the Code Division
Multiple Access 1 Carrier (CDMA2000 1x) technology, advocated by the 3
rd
Generation
Partnership Project 2 (3GPP2), has been widely used for commercial purpose.
The CDMA2000 1x technology is compatible with IS -95A and IS -95B standards. The
capacity of the CDMA2000 1x system increases substantially thanks to technologies
such as reverse pilot, fast power control and transmits diversity.
As the evolution of the CDMA2000 1x, 1xEV-DO (EVolution-Data Optimized) can
provides a peak forward data rate at 2.4 Mbps and a peak reverse data rate at 153.6
kbps. It can deliver diversified radio data services such as multi-media gaming,
multi-media news, real-time video traffic news, video phone, video conference,
real-time security information, and location-base services.
This chapter provides the compassion between the CDMA2000 1x and the 1xEV-DO
technologies, and introduces the network solution of Huawei CDMA2000 1x / 1xEV-DO
hybrid mobile communication system and the position of BTS3606A in this solution.
1.1 Comparison between CDMA2000 1x and 1xEV-DO
The BTS3606A supports both CDMA2000 1x and 1xEV-DO.
Table 1-1 exams the differences between them.
Table 1-1
Comparison between CDMA2000 1x and 1xEV-DO
Item
CDMA2000 1x
1xEV-DO
Peak data
rate
Forward (RC3): 153.6 kbps
Reverse (RC3): 153.6 kbps
Forward: 2.4 Mbps
Reverse: 153.6 kbps
Code
Convolutional code and Turbo code
Turbo code
Modulation
Reverse: Hybrid Phase Shift Keying
(HPSK)
Forward: Quadrature Phase Shift Keying
(QPSK)
Reverse: HPSK
Forward: QPSK, 8-Phase Shift Keying
(8-PSK), 16- Quadrature Amplitude
Modulation (16-QAM)
Handoff
Forward: Soft handoff and hard handoff
Reverse: Soft handoff and hard handoff.
Forward: Virtual soft handoff
Reverse: Soft handoff
Rate/power
control
Forward: Power control
Reverse: Power control
Forward: Rate control
Reverse: Rate control and power control
