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CDMA BTS

Hardware Introduction

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A CDMA Network

AN: Access network MSC: Mobile Switching Center

AN-AAA: Access network-authentication, MS: Mobile Station

authorization and accounting PSTN: Public Switched Telephone Network

AT: Access terminal PDSN: Packet Data Serving Node

BSC: Base Station Controller PCF: Packet Control Function

BTS: Base Transceiver Station PLMN: Public Land Mobile Network

ISDN: Integrated Services Digital Network

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Objectives

Upon completion of this course, you

will be able to

BTS 3606 system and structure.

Function of all BTS3606 boards.

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Contents

Chapter 1 System Overview

Chapter 2 Structure & Board

Chapter 3 Networking

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Technical Features of BTS3606

Support both the CDMA2000 1X and 1xEV-DO standards.

Support CDMA2000 1X /1xEV-DO hybrid networking. The ratio of

CDMA2000 1X and CDMA2000 1xEV-DO carriers is flexible.

Allow mixed configuration of single-channel and multi-channel

transceiver modules.

Support high-power coverage and large-capacity coverage using carriers

of different frequencies for a single sector,

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Technical Features of BTS3606

Support the mixed insertion of different-band carriers in the same

cabinet.

The BTS3606 can be cascaded with the ODU3601C to expand thecoverage area of radio network flexibly.

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BTS3606 RF Index

Band Class BTS Tx FrequencyBTS Rx Frequency

Transmitpower

(Single

Channel)

Transmitpower

(Multi

Channels)

Receiver Sensitivity

0 869 ~ 894 MHz

824 ~ 849 MHz

25W 50W -127 dbm

1 1930 ~ 1990 MHz

1850 ~ 1910 MHz

25W 50W -127 dbm

-126 dbm (Multi Channel)

5 460 ~ 470 MHz

450 ~ 460 MHz

20W 50W -127 dbm

-126 dbm (Multi Channel)

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Contents

Chapter 1 System Overview

Chapter 2 Structure & Board

Chapter 3 Networking

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BTS3606 Logic Structure

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BTS3606 Baseband Subsystem

C

C

P

M

4

C

C

P

M

2

C

C

P

M

0

B

C

K

M

0

B

C

I

M

0

C

C

P

M

5

C

C

P

M

3

C

C

P

M

1

B

C

K

M

1

N

U

L

L

BCIM: BTS Control Interface Module

Interface board of Abis with 8 E1/T1 cables

CCPM: Cpmpact-BTS Channel process Module Channel Process

Two Types

- Type A: provide forward 128 forward CE and 64

reverse CE

- Type B: provide forward 256 forward CE and 128

reverse CE

Connect to ODU3601C by optical port.

BCKM: BTS Control and Clock Module

Signaling processing

Adopts the GPS/GLONASS as an external

clock/resource to provide 1PPS (One pulse/second)

and GPS.

System Management

CECM: Compact-BTS EV-DO Channel Module

Channel process for EV-DO

Provide forward 96 forward CE and 48 reverse CE

Connect to ODU3601C by optical port

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Structure of RF subsystem

C

H

P

A

C

T

R

M

C

H

P

A

C

T

R

M

CDDU: Compact-BTS Dual Duplexer Unit

Two Duplexer inside, low band filter

CTRM: Compact-BTS Transceiver Module

RF signal transmitting and receiving

CMTR: Compact-BTS Multi-channel Transceiver

Module

CMTR can support 1x carrier and EV-DO carrier

simultaneously. E.g 2 1x carriers and 1 EV-DO

carrier cab be configured in 1 CMTR

Note: CMTR and CMPA will substitute for CTRM and

CHPA when multi-carrier applied.

CFMM: Compact-BTS Fan Monitor Module

CHPA: Compact-BTS High Power Amplifier

RF power amplification

CMPA: Compact-BTS Multi-channel PowerAmplifier

CMPA amplifies RF modulation signals from CMT

or CTRM.

C

HP

A

C

TR

M

C

HP

A

C

TR

M

C

HP

A

C

TR

M

C

D

D

U

C

D

D

U

C

D

D

U

C

H

P

A

C

T

R

M

C

H

P

A

C

T

R

M

C

H

P

A

C

T

R

M

C

HP

A

C

TR

M

C

HP

A

C

TR

M

C

HP

A

C

TR

M

1 3 5

0 2 4

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O&M Path in Master Cabinet

CCPM4/

CECM4

CCPM2/

CECM2

CCPM0/

CECM0

CCPM1/

CECM1

CCPM3/

CECM3

CCPM5/

CECM5

CTRM1/

CMTR1

CTRM3/

CMTR3

CTRM5/

CMTR5

CTRM4/

CMTR4

CTRM2/

CMTR2CTRM0/

CMTR0

Backplane bus

Backplane bus

BCKM

CCPM

CTRM

Backplane bus

Backplane bus

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O&M Path for ODU

CCPM ODU1 ODU2 ODU3BCKM

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Traffic Path-1 in Master Cabinet

Sector

Carrier 0

CTRM1

Sector

Carrier 1

CTRM3 CTRM5 CCPM4 CCPM2 CCPM0

CTRM0 CTRM2 CTRM4 CCPM5 CCPM3 CCPM1

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Traffic Path for ODU

CCPM ODU1 ODU2 ODU3BCKM

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Contents

Chapter 1 System Overview

Chapter 2 Structure & Board

Chapter 3 Networking

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Contents

Chapter 3 Networking

3.1 Single - Channel Mode

3.2 Multi - Channel Mode

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O1/S1 Networking

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O2 Networking

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S1/1/1 Networking

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S2/2/2 Networking

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Contents

Chapter 3 Networking

3.1 Single - Channel Mode

3.2 Multi - Channel Mode

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S(1/1/1), S(2/2/2) and S(3/3/3) Configurations

Sector A Sector B Sector C

RX1

RX2

TX1

TX2

RF_out

RF_in

Sample

CMPA CMTR

DRI

MRI

MRO

TX

TXF

CDDU

RX1

RX2

TX1

TX2

RF_out

RF_in

Sample

CMPA CMTR

DRI

MRI

MRO

TX

TXF

CDDU

RX1

RX2

TX1

TX2

RF_out

RF_in

Sample

CMPA CMTR

DRI

MRI

MRO

TX

TXF

CDDU

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CDMA BTS with FE