STRAEX800_CBTS_LPA(010619).doc

7/29/2019 STRAEX800_CBTS_LPA(010619).doc

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BTS System Description

STRAEX-800 Compact-BTS System (Standard)

Summary

This document describes compact BTS system. Compact BTS system is BTS of Starex-800 Standard, a personal

communication system adopting CDMA digital mobile communication technology.

Table of Contents

1. General...............................................................................................................................1

1.1 Overview.......................................................................................................................1

1.2 Specification.................................................................................................................2

2. Architecture.........................................................................................................................5

2.1 H/W Configuration........................................................................................................5

2.2 S/W Configuration.......................................................................................................11

3. Functions...........................................................................................................................13

3.1 Main functions of BTS ................................................................................................13

3.2 H/W Configuration and Function.................................................................................15

3.3 Configuration and Functions of S/W...........................................................................34

3.4 Call Control ................................................................................................................41

3.5 Handoff Control Function............................................................................................50

3.6 Authentication ............................................................................................................56

3.7 Location Registration Function...................................................................................624. Lower Subsystem Description...........................................................................................65

4.1 ECMS.........................................................................................................................65

4.2 RCCS.........................................................................................................................74

5. Structural and Environmental Conditions..........................................................................81

5.1 Structural Features.....................................................................................................81

5.2 Environmental Conditions...........................................................................................81

6. Abbreviations ....................................................................................................................82

Issue 1. 04/00 LGIC Confidential and Proprietary i


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1. General

1.1 Overview

Compact BTS(C-BTS) is located between MS and BSC in the STAREX-800, a personal communication system

adopting CDMA digital mobile communication technology, and it controls calls for MS and performs maintenance

function.

In other words, C-BTS guides MS to recognize BTS at first and sends necessary data. It allocates traffic channel

upon call request and opens call path.

BTS is designed to be extended to 4 FA in terms of capacity extension and maximum 48 BTS can be

accommodated on one BSC.Main functions of C-BTS are as follows;

Call control and Cal resource management

Loading

Configuration and operating information processing

Fault handling

Statistics, overload measurement and control

Radio signal processing, radio ling test and TPTL

Packet routing and transmitting

Inventory

Remote Control

Issue 1.04/00 LGIC Confidential and Proprietary 1


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1.2 Specification

1.2.1 General Specifications

Item Specification

C-BTS Types Up to 4FA/3Sectors

Traffic Channels Capacity per Sector More than 13Chs/Sector/FA

13K QCELP Vocoder

Traffic Handling Capacity per Sector More than 9.0 Erlang/Sector/FA

BP=2%

No. of Channel Elements per Board 20 Channel Elements

Environmental Requirements

Operating Temperature Limits

Relative Humidity Limits

0 ~ 50oC

5 ~ 95%

Rack Size 750Wx650Dx1,886H (mm)

No. of Receiver Antenna 2EA/Sector

Frequency Band Downlink (MS BTS) :

824~849MHZ

Uplink (BTSMS) :

869~894MHZ



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1.2.2 RF Specifications

1.2.2.1 Receiver Specifications

Parameter Description Comments

Operation Band 824 ~ 849 MHz

Diversity Dual Diversity on Rx

Frequency Transition Straight Transition of license Block operation

RF Interface 50 nominal impedance

Noise Figure 5dB (Max)

Sensitivity FER is 1.0% or less with 95% confidence. -117dBm per RF Input port

Dynamic Range FER is 1.0% or less with 95% confidence. not less than -65dBm/

23MHz in AWGN and

Eb/No of 10dB 1dB

Conducted Spurious

Emissions

Less than -80dBm in 30kHz RBW, RX Band.

Less than -60dBm in 30kHz RBW, TX Band.

Less than -47dBm in 30kHz RBW, all other

frequencies.

IS-97-A



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1.2.2.2 Transceiver Specifications

Parameter Description Comments

Operation Band 869 ~ 894MHz

Frequency Transition Straight Transition of license Block operation

Frequency Tolerance Within 5 x 10-8 of the FA ( 0.05ppm)

Pilot Time Tolerance 10s

Pilot Channel to Code

Channel Time Tolerance

The time error between the Pilot Channel and all

code channels comprising the Forward CDMA is

within 50ns

Pilot Channel to Code

Channel Phase Tolerance

The phase differences between the Pilot Channel

and all code channels sharing the same Forward

CDMA shall not exceed 0.05radian

Waveform Quality is greater than 0.912

(excess power < 0.4dB)

Total Power within +2dB and -4dB of nominal power

Code Domain Power 27dB or more below the total power in each inactive

channel

Conducted Spurious

Emission

-45dBc 750kHz @30kHz RBW

-60dBc 1.98MHz@ 30kHz RBW

-13dBm 3.125MHz@ 100kHz RBW

IS-97A



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2.1.1 ECP (Enhanced Control Processor Block)

ECP block is mounted on the standard BTS and performs downloading, call control, alarm collection and

maintenance functions. It also has trunk interface function between BTS and BSC and packet routing and

interface function for the packet exchange. H/W is composed of ECPA (the master processor), BAMA (collecting

alarms in BTS and performing maintenance function), ENIA (network of BTS), BADA (performing mobile

simulation and diagnostic functions), BSBB (supplying power and physical channel), and LICD for trunk

interface with BSC.

ECPA

ECPA

BAMA

PSU/

G

PSU/

G

B S B B

BADA/D

ENI

A

ENI

A

Mounting Diagram of ECP

B S C

M B U S

S h e l f B U S

E N I A E N I A E C P A B A M A B A D A - D

R C P A R C P A

4 T 1 / E 1

4 T 1 / E 1

T A X IT A X I

T A X I T A X I

B T M A

R S - 4 2 2

R S - 4 2 2

P S T

T I P / R I N G

M B U S

Structure of ECP



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(1) ECPA : the master processor of BTS

(2) BAMA : collects alarms in BTS and performs maintenance function

(2) BADA : performs mobile simulation and diagnostic functions, makes diagnosis on BTS and measures Tx/Rx

antenna VSWR

(4) ENIA : network of BTS

(5) LICD : trunk interface with BSC

(6) BSBB : backboard of ECP block

2.1.2 BTR (BTS Timing Reference Block)

BTR is mounted on C-BTS and composed of BTMA which provides BTS system synchronization and clocks byusing TOD received by GPS and synchronization signal, and CGPS which consists of GPS engine, power supply,

OCXO and the controller.

BTMA receives 10MHZ (sine wave), 1PPS (TTL) and TOD (Time of Day) from CGPS and broadcast TOC

through IPC link in BTS. BTMA is operated in duplex and all signals between CGPS and BTMA are linked

through the back plane. BTMA and CGPS use their own on-board power supply.

B T M AC G P S

C o n t r o l

T O D / 1 0 M h z / 1 P P S

E C P A

R S - 4 2 2BTMA

CGPS

BTMA

B A M A

M B U S

R e m o t e C o n t r o l

s p l i t t e r

1 0 M H Z

Mounting Diagram of BTR Structure of BTR

(1) BTMA : provides synchronization and clock for BTS system

(2) CGPS : provides 10MHZ, 1PPS and TOD, and controls two GPS modules



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2.1.3 RCB (Radio Channel Bank Block)

RCB block is mounted on standard BTS of C-BTS and performs CDMA channel modem function, channel

distribution function, RF signal up/down conversion function and Tx power estimation function. H/W is

composed of MCPA, RCPA, BUDA and PACA. MCPA is responsible for the overhead channel and traffic

channel of BTS and RCPA is responsible for the maintenance of RCB block. BUDA functions as an up/down

converter and PACA measures the power of the forward link.

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

MCPA20

RCPA

RCPA

BUDA/D

BUDA/D

BUDA/D

BUDA/D

BUDA/D

PACA/D

P

SU/I

P

SU/I

R C B B

BUDA/D

Mounting Diagram of RCB

S e r i a l B U S

R C P A P A C A - DM C P A 2 0

09. . .

B U D A - D( 1 F A )

B U D A - D( 2 F A )

P a c k e t B U S

L P A U / DE N I A

R S - 4 8 5 A s y n c .T A X I

Structure of RCB



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(1) RCPA : RF device control, base-band digital combining of the forward link

(2) MCPA20 : functions overhead channel and processes digital signal for CDMA channel

(3) BUDA : frequency conversion of Tx/Rx signal, A/D Conversion

(4) PACA : monitors transmitting output level change

(5) RCBB : back board of RCB block

2.1.4 LPA-D (Linear Power Amplifier Block D)

LPA-D is mounted on standard C-BTS and composed of 6 units of LPAU-D. LPA-D amplifies the signal to enable

remote MS to receive up converted CDMA signal. LPAU-D performs data interfacing with RCPA and informs thestatus of LPAU-D. It also performs several commands - enable/disable, status request or version request. Through

a separate H/W line, it sends alarms (mount/dismount alarm, power on/off alarm) of LPAU-D to RCPA.

LPAU/D

LPAU/D

LPAU/D

LPAU/D

LPAU/D

LPAU/D

Mounting Diagram of LPA-D

(1) LPAU-D : amplifies Rx signal

2.1.5 FECU (Front-End Block)

FECU is mounted on standard C-BTS and this is the from-end device of duplex type.

FECU is composed of 3 units of FECU.

4 FA can be covered for receiving. Alarms of FECU are sent to BAMA in TTL signal format.



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F E C UA l p h a F E C UB e t a F E C UG a m m

Mounting Diagram of FED

(1) FECU : front-end module for compact BTS type



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2.2 S/W Configuration

BTS S/W is composed of 2 subsystems ECMS and RCCS.

B T S

B S M

V L R

M S C

M S CB S C

: T r a f f i c

: S i g n a l l i n g

: C o n t r o l S T A R E X - 8 0 0 B S S

S B PS V C

C C P

( C C M S )

( S V C S )

E C P

( E C M S )

( R C C S )C E R C P

B T S B S C

2.2.1 ECMS (Enhanced BTS Call Control & Management) Subsystem

ECMS subsystem sets and releases mobile calls, and manages mobile call resources.

ECMS also performs operation & maintenance functions downloading, status management, configuration and

operation information change, fault handling, remote control, inventory, testing with BADA, overload control,

statistics, etc.



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2.2.2 RCCS (Rf & Channel Control) Subsystem

RCCS subsystem controls MCPA and BUDA, and processes digital signals and calls for J-STD-008 CDMA

channel.

It also performs operation & maintenance functions such as channel element downloading, device status

management and statistics.

It controls and manages all RF devices such as BUDA frequency synthesizer control, LPAU enable/disable, etc.

RCCS measures AGC/RSSI level and performs RF power control such as Tx gain control for the whole sector.



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3. Functions

3.1 Main functions of BTS

Main functions of BTS subsystem are as follows;

1) Call Control

BTS subsystem sets and releases mobile-to-land, land-to-mobile or mobile-to-mobile calls in BTS by

interworking with MS and BSC. It also supports softer, soft and hard hand-offs.

Markov calls to set testing calls are also processed here.

2) Call Resource ManagementBTS subsystem disperses and selects the load of the channel element, which is necessary for call setting. When

releasing a call, it withdraws the load of the channel element.

It also reserves dedicated information for hand-off for a stable hand-off according to the frequency of hand-off

occurrence.

3) Downloading

BTS subsystem downloads necessary OS for each processor and the application code from the upper processor.

If the version of OS or the application code is same, it does load but OS or the application is transferred from the

flash memory, a nonvolatile memory.

This finally prevents unnecessary loading time and reduces BTS initialization time.

After downloading application code, ECP builds database regarding its status, configuration and operation with

PLD data directly transferred from BSM. Then it sends configuration information necessary for initialization to

the lower processor, RCP.

4) Configuration and Status

BTS subsystem manages processor status, device status, configuration information and operation information for

the operation and maintenance of BTS.

ECP interworks with RCP, a sub-processor, and upper BSC and BSM, and performs operation and maintenance

functions for the whole BTS.

5) Fault and Alarm Handling

BTS subsystem handles H/W faults power failure, processor fault, cable removal- and S/W faults which does

not need H/W device to detect faults.

RCP in BTS detects device faults and alarms in its management area and reports them to ECP. Then ECP reports

them to the upper part with proper measures.



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H/W faults are detected through BAMA and reported to ECP.

6) Testing

Regarding the channel element (especially the traffic channel), BTS subsystem periodically tests the available

resources on-line to improve reliability of the resource.

With the test result, BTS decides whether the resource is going to be used or not.

Test is also available upon operators request.

There are two CE test CE H/W test and a test with BTS Markov calls.

The operator can understand the call status in BTS with BADA.

7) Overload Control

There are four levels - Normal, Minor, Major and Critical according to processor loading. BTS subsystem

takes proper actions for each level such as origination prohibition, origination/termination prohibition.

8) Statistics and Measurement

BTS subsystem collects various statistics call statistics, process statistics, paging statistics, CE (Channel

Element) statistics, BTS performance statistics and CAI (Common Air Interface) statistics- and reports them.

The statistics are collected every hour basically and reported to BSM. If necessary, the operator can set the time

and cycle for the measurement.

9) Remote Control

BTS subsystem separates or resets the shelf power, processor or device. When the operator commands

separation or reset on BSM, ECP identifies the subject (BAMA or RCP) and sends the message to the subject to

perform the command.

10) Inventory

This is to manage the history of each board. BTS subsystem manages history (CN application, repairing history

or remarks) of a certain board and BTS.



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3.2 H/W Configuration and Function

3.2.1 H/W Configuration

E C P

E C P A

B A M A

B A D A

E N I A

L I C D

B S B B

B T R

B T M A

C G P S

R C B

M C P A 2 0

R C P A

B U D A

P A C A

R C B B

L A P

L P A U

F E C U

F E C U

C o m p a c t B T S ( S t a n d a r d )



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3.2.2 Functions for Each H/W Unit

3.2.2.1 ECP (Enhanced Control Processor Block)

(1) ECPA (Enhanced Control Processor circuit board Assembly)

ECPA is mounted on ECP block of BTS and duplexed. ECPA functions as the master processor of BTS -

downloading from the upper part, loading to the lower processor, controlling MS calls and managing BTS status.

It has packet routing function for the packet exchange in BTS and provides the packet node and path. The block

diagram and main functions of ECPA are as follows;

M C 6 8 3 6 0

M C 6 8 0 3 0

B u f f e r S R A M

P a c k e t

R O M

D R A M

F L A S H

P a c k e t

U - T u r n

B S C

B T M

F I F O

F I F O

F I F O

F I F O

F I F O

B A M A

B A D AS h e l f B u s

P a c k e t I / F( C P U S l a v e )

R O M

S R A M

F L A S H

M F P

P O R T

D R A M

? ????

L I C D

( F r a m e r , I

B A M

E N I A

E X T

R X ( 8 ) T X ( 8 )

2 T 1 / E 1

M - B u s

I n t e r n a l B u s

O t h e r S i d e

S h e l f B u s

E C P A B l o c k D i a g r a m

ECPA has mainly two kinds of functions ECP function and NMM-P function. ECP function is composed of

68030 local processor function, shelf bus master function, duplexing function, packet bus slave node function

and M-Bus interface function. NMM-P function is composed of 68360 local processor function, network master

function, trunk interface function, packet bus slave node function and M-Bus interface function.



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Local processor function is composed of the local resource (RAM, ROM) and I/O (MC68901) centered on

MC68030, and has the actual ability to perform and control the program. Shelf bus master function is composed

of 8Bit parallel bus and used for the communication with BAMA and BADA.

Duplexing function is composed of command channel and data channel, and the function is implemented in the

warm standby method. Packet bus slave node function provides IPC data channel of ECP and this is duplexed.

M-Bus interface function is the maintenance bus and operated by BAMA, M-Bus Master. And BAMA can

initialize ECP H/W remotely. NMM-P function is composed of local resource (RAM, ROM) centered on

MC68360 and has local processor function performing and controlling the program. Network master function is

the master of the packet bus that is operated in 8 bit full duplex bus. It allows transmitting and receiving of total

10 nodes and has maintenance function. Packet bus slave node function provides NMM-P with IPC data

channel. M-Bus interface function is composed of BAMA (M-Bus master) and RS-485 interface.

ECP functions

- MC68030 core

- IPC slave node

- Duplexing

- Shelf bus master

- M-Bus interface

NMM-P functions

- 68360 core

- IPC slave node

- M-Bus interface

- Network master

(2) BAMA (BTS Alarm collection & Maintenance board Assembly)

BAMA is located in ECP block of C-BTS and its main functions are collecting and reporting alarms in BTS,

remote control, BSM accessing through PSTN (modem) and BTS maintenance. The block diagram and main

functions of BAMA are as follows;



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D R A M ( 4 M )1 M x 3 2 B i t

I P C

N I M 2R S 2 3 2

A l a r m B u f f e r( A B M )

P S T N O t h e rC i r c u i t B o a r d

B T M AD e b u g

P o r t E N I A

M - B U SA l a r m ( 1 8 0 )

B A M A B l o c k D i a g r a m

E C P A

C P UM C 6 8 3 6 0

B o o t e rF l a s h ( 5 1 2 K )

5 1 2 K x 8 B i t

A p p l i c a t i o nF l a s h ( 5 1 2 K )

5 1 2 K x 8 B i t

T i m eK e e p e r ( 2 K )

2 K x 8 B i t

R S 4 2 2 R S 4 8 55 6 K

M O D E MM C UM D PD A A

S h e l f B U SS R A M

( 6 4 K x 8 )

A r b i t e r

R e m o t eC t r l

F P G A

A l a r m

F P G A x 2

R S 4 2 2B u f f e r B u f f e r

R . C ( 2 4 )E D U( O u t d o o r O n l y )

Collecting and Reporting H/W alarms in BTS

BAMA can receive maximum 180 BTS H/W alarms (Cable alarm: 158, Shelf alarm: 22) including reserved

16 pins and the collected alarms are sent to ECPA through IPC (RS-422/HDLC).

Remote Control

Power pack on/off is available through BAMA and the processor in each board can be restarted. Maximum

24 units can be restarted.

The electric standard is TTL. When TTL is high, power pack is off or the board is reset. When TTL is low,

the power pack is on or the board is running.



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BSM Accessing through User I/F (PSTN) Modem

BSM (Workstation or PC) can access to BAMA through PSTN. BSM can check the status of BTS, perform

remote control and make a diagnosis on the boards of BTS. The protocol of the modem is V.90 and the

maximum speed is 56Kbps.

BTS Maintenance (by Maintenance Bus and EDU Communication)

BAMA functions as master of the maintenance bus checking board status in BTS and managing

boards. M-Bus is HDLC bus type configuring with a master and several slaves. Each slave

performs CTS control so collision among slaves does not happen. The electric standard is RS-

485.

S/W alarms and the status of EDU are communicated through a separate RS-422/HDLC.

(3) BADA (Base station Analyze & Diagnostic Assembly)

BADA functions as mobile simulator and performs DM function of the mobile simulator. BADA in RF-matrix

structure selects RF path routes and performs path testing.

The block diagram and main functions of BADA are as follows;

Checking the status of Tx/Rx parts of BTS

Checks the status of BTS with Markov calls.

Measuring Tx antenna VSWR

Measures Tx antenna VSWR features of BTS by measuring power of the forward port and reverse port of

the antenna coupler.

Measuring Rx antenna VSWR

Measures Rx antenna VSWR features of BTS by measuring and comparing the adjust during call setting

with forward port and reverse port of the antenna coupler or comparing with measuring Tx power of the

mobile simulator.



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B A D A C O N T R O L

D E C O D I N G & R E G I S T E R B A N K & P O W E R

R FM A T R I X

B L O C K

M O B I L ES i m u l a t o r

B C D B

( B A D A C o n t r o l D a u g h t e r B o a r d )

P O W E R

R E G U L A T I O NA D D R E S S D E C O D I N G &

C O N T R O L R E G I S T E R B A N K

C A ( 0 : 7 )C A S *C D S *

C W R *

C D ( 0 : 7 )

T R A N C -

E I V E R

T X D _ M PR X D _ M P

M F A I L

*

F A I L *

O P E N

CONTROL

&

STATUS

M S _ P W R _ S WM S _ P R E _ S W

M S P _ S T S *

P R O E _ S T S *

T X D _ M S R XD _ M S

M S _ P O W E RM S _ P R O G _ E N

H _ R E S E T *P U S H

S W

L E D

D I S P L A Y

P O W E R L E D F A I L L E D

L I N K L E D

E C P ASHELF ADDRESS BUS & S HELF DATA BUS

T O W E R T O P T R XT T L

M - B U S T R X T T L

E X T E R N A

U N I T

B A M A

C O N T R O L T R XR S 4 2 2

M - B U ST R X

R S 4 2 2

F R O N T

( D I R E C T I

C O U P L E

R F S I G N A LC O A X I A L 1 8 E A F O R S I M P L E

C O A X I A L 1 2 E A F O R D U P L E

C O A X I A L

O P E N & F A I L

+ 5 V

- 5 V

I N V E N T O R Y

M O N I T O R

P O R T

V E R S I O N

M O N I T O R

P O R T

( 9 P I N )

E E P R O M

R S 2 3 2

T T L( O P E ND R A I N )

T BD

T O W E R T O P L N A S W I T C H C O N T R- T T L 1 2 L I N E

B A D A B l o c k D i a g r a m

E X T E R N A L R FU N I T

(4) ENIA (Enhanced Network Interface circuit board Assembly)

ENIA is mounted on ECP block of BTS and duplexed. As a network management processor, ENIA has network

management function and packet routing function for the exchange of the packet in BTS, and provides packet

node and path. ENIA is also responsible for TAXI Link I/F and Trunk I/F functions.

The block diagram and main functions of ENIA are as follows;



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M C 6 8 3 6 0

( 2 5 M H z )

P a c k e t I / F( C P U S L A V E )

R O M

D R A M

F L A S H

R C P A

F I F O

T A X II / F

F I F O

T A X II / F

F I F O

T A X II / F

F I F O

T A X II / F

B A M AM B u s I / F B S C

R C P A

R X ( 8 ) T X ( 8 )

M - B u s

E C P A

P a c k e t

C o n t r o l

B r i d g e

L I C D( F r a m e r

, L I U )

4 T 1 / E 1

E N I A B l o c k D i a g r a m

There are mainly two functions - 68360 local processor function of ENIA and NMM-P function. NMM-P

function is composed of network master function, trunk interface function, TAXI interface function, packet bus

slave node function and M-Bus interface function.

NMM-P function has a local processor function performing and controlling the program with local resource

(RAM and ROM) centered on MC68360. The network master function is the master of the packet bus that is

operated in 8 bit full duplex bus. It allows total 10 nodes to transmit/receive and performs maintenance function.

Trunk interface function converts parallel data into serial data and sends to LICD board which functions trunk

interface. This function also controls LICD board.

TAXI interface function sends data with high speed of 80 Mbps with using TAXI transmitter/receiver of AMD.

TAXI link is implemented in cross duplexed.

Packet bus slave node function provides IPC data channel to NMM-P. M-Bus interface function is a

maintenance bus and operated by BAMA (M-Bus master). It initializes H/W of ENIA remotely. M-Bus

interface function is composed of BAMA (M-Bus master) and HDLC bus.



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NMM-P functions

- 68360 local processor

- IPC slave node

- M-Bus interface

- Network master

- Trunk interface

- TAXI interface

(5) LICD (Line Interface Control Daughter board)

LICD is a trunk interface daughter board which is mounted in BSBB back plane of BTS. LICD has 4 units of

T1/E1 trunk link lines to transmit/receive T1/E1 packet between ENIA of BTS and CITA of BSC. The built-in

framer of LICD selects T1 and E1. Four units of links should be used as T1 or E1.

The following is the block diagram of LICD.

L I C D

L I C D B l o c k D i a g r a m

C o n t r o lF P G A

F R A M E RX 4

L I UX 4

T R A N S

T R A N ST R A N S

T R A N S

O S C

M C 6 8 3 6 0 B u f f e r

E C P A / E N I AR S - 4 2 2

C o n t r o l S i g n a l

C o n t r o l D a t a B u s

R

ELAY

C o n t r o l S i g n a l

B S C

O T H E RB T S

E 1

E 1

(6) BSBB (BTS Standard Back Board)

BSBB is the back board of ECP block mounted on C-BTS.

Based on 2 units of power board (LCP-A), 2 units of ECPA, 1 unit of BAMA, 1 unit of BADA and 2 units of

ENIA, BSBB is designed in a way that maximum 4 units can be mounted. Also the trunk interface function is

mounted on the back of BSBB in daughter card (LICD : Line Interface Control Daughter board) type. Each card

has the capacity of 4 E1/T1.

BSBB is a multiple board (14 floors) PBA and the size is appropriate to be mounted on the standard shelf of C-

BTS. The dimension is 294.5mm x 254.0mm x 3.2mm and te design allows BSBB to accommodate board of

ECP block in standard C-BTS.

To minimize crosstalk between signals and the reflection effect of the signal line end, BSBB is designed in a way



24/83


that layers and TTL signals have 50 Ohm of pattern impedance and the differential signals have 110 Ohm of

pattern impedance.

3.2.2.2 BTR (BTS Timing Reference Block)

(1) BTMA(BTS Timing Management circuit board Assembly)

BTMA receives 10MHZ(TTL), 1PPS(TTL) and TOD(Time of Day) from CGPS and broadcasts TOD through

IPC link in BTS. BTMA is operated in duplex and the signals between CGPS and BTMA are linked through

back plane. BTMA uses on-board power supply.

The block diagram and main functions of BTMA are as follows;

M C 6 8 E M 3 6 0

( 3 . 3 V )

M a i n M e m o r yD R A M

( 1 6 M b i t x 2 E A -3 2 b i t ) - 4 M B y t e

F l a s h

M e m o r y( B o o t e r -

4 M b i t )

5 1 2 K B y t e

F l a s h

M e m o r y( A p p l i c a t i o n -

4 M b i t )

5 1 2 K B y t e

T i m i n g G e n

B l o c k

( S Y S _ C L K / E V E N _ S E C )

A [ 2 : 1 3 ]

A [ 1 8 : 2 1 ]A [ 0 : 1 8 ] A [ 0 : 1 8 ]D [ 0 : 3 1 ] D [ 2 4 : 3 1 ] D [ 2 4 : 3 1 ]

C S 1 ( R A S 1 )

C S 0

C S 2

A [ 0 : 2 1 ]D [ 0 : 3 1 ]

R S -4 2 2

( T X )

R S -4 2 2( T X )

R S 4 2 2( R X )

R S 4 2 2( R X )

A L I N K

T o E C P A

B L I N K

T o E C P A

S Y S _ C L K / E V E N _ S E C4 P O R T

[ P - E C L ]T o R C P A

1 0 M h z

[ T T L ]

1 P P S

[ T T L ]

C S 5

F a u l t &R e d u n d a n c y

M a n g e m e n t

B l o c k

O P E N / F F / P

[ T T L ] T oB A M A

R e d u n d a n t c n

s i g n a l t oo t h e r s i{ T T L ]

M - B U S

D e b u gp o r t

R S 4 8 5t o B A M A

R S 2 3 2 C

I n v e n t o r y

P o r tT T L

I 2 C

T O D

[ T T L ]

H D L C

B T M A B l o c k D i a g r a m

F R O M

G P S

Main Functions

Clock generation

- SYS_CLOCK/EVEN_SEC

- p-ECL interface

GPS interface

- TOD / Control / Alarm / 1 PPS / 10 MHZ

- TTL interface



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MBUS interface

- Power on/off

- RS485 interface

IPC

- Interface with NIM2 ASIC

- RS422 Serial Interface

Interactions

Interface between BTMA and CGPS is as follows;

Clock Interface : provides 1PPS and 10Mhz (from CGPS)

TOD, Control TTL Interface : provided to BTMA through back plane

Alarm Interface : Receives GPS H/W alarms (Open / Power fail / Function fail) from CGPS and provides

them to BAMA.

(2) CGPS (Compact BTSs Global Positioning System)

CGPS provides 10 Mhz (TTL), 1 PPS (TTL) and TOD (Time of Day - TTL) to BTMA.

All signals between CGPS and BTMA are linked through back plane and CGPS uses own on-board power supply.

The block diagram and main functions of CGPS are as follows;

CGPS provides following functions with visual information from GPS satellite.

10 Mhz, 1PPS, TOD generation

Control port, Alarm interface

Redundancy control

Fault monitoring

CGPS has external interface input/output through back plane and internal interface with the connection between

CGPS and BTMA.

External Interface

- 10 Mhz (sine wave-50 ohm-SMB) --- 3 port

- 1 PPS (TTL,50 ohm-SMB) --- 1 port

- TOD (RS232C-9 pin D-sub) --- 1 port

- Control (RS232C-9 pin D-sub) --- 1 port

- ANT (TNC Female) --- 2 port

- PWR --- 2 port

Internal Interface

- 10 Mhz (TTL-50 ohm) ---- 2 port

- 1 PPS (TTL,50 ohm) --- 2 port



26/83


- TOD (TTL,50 ohm) --- 1 port

- Control (TTL,50 ohm) --- 1 port

C G P S

1 P P S / T T L / S M B

1 0 M h z / S in e w a v e / S M B

T O D [ R S 2 3 2 C ] / 9 P i n D - S u b

C o n t r o l [ R S 2 3 2 C ] / 9 P i n D - S u b

A N T / T N C

P o w e r / 2 0 ~ 6 0 D C

C G P S B l o c k D i a g r a m

3.2.2.3 RCB (Radio Channel Bank Block)

(1) RCPA (Radio & Channel Processing board Assembly)

RCPA performs base-band digital combining of the forward link and parity checking and generation of the

backward link. RCPA also distributes the timing of the digital shelf and the standard frequency. Lastly, it also

controls RF devices.

RCPA consists of Core Control Module (CCM) interfacing with CPU (i960), ESCC in charge of monitor

interfacing through RS-232, memory controller controlling memory, HDLC in charge of duplexing the board,

and peripheral controller in charge of interfacing of peripheral devices of the board. 6 units of CSM (Cell Site

Modem) ASIC corresponding to CDMA code channel or ECM ASIC control are equivalent here.

The block diagram and main functions of RCPA are as follows.



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C P U B U S

C H A N N E LP R O C E S S O R

i 9 6 0 C F - 4 0( I N C L U D I N G D M A )

T im i n g&

6 S e c t o r C D M AD a t a

C o n t r o l / I n t e r f a c e

B u s & I n t C o n t r o l& S t a t u s M o d u l e

& M o n i t o r i n g P o r t& P h e r i p h e r a l

C o n t r o l

1 M x 3 2D R A M B a n k ( w / P a r i t y )

&2 5 6 K B C a c h e

P a c k e t I n t e r f a c eM o d u l e

I / O B U S

C a c h eC o n t o l l e r

( 0 - w a i t P / B u r s t )

F L A S H M e m o r y( B a c k u p m e m o r y )

3 2 1 6

1 6

3 2

H O T l in kT r a n s c e iv e r

I n t e r r u p t S i g n a l

B o a r d D u p l e x e L in k( H D L C )

p E C L& C l o c k B u f

B u f f e r

T A X IT r a n s c e iv e r

P a r a l le l P a c k e t b u s In t e r f a c ew i t h M C P A

T A X I In t e r f a c ew i t h E N I A

F r o m / T o R C B

T i m i n g S i g .

R X D a t a

T X D a t a

C S MI n t e r r u p t s

E P R O M( B o o t & J ig )

C o n t r o l

A d d r & D a t a

I n t e r - b u sB u f & F I F O

I n t e r - R C P A D u p l e x B a c k u p P a t h

R S 2 3 2

S t a t u s

S e r i a lE E P R O M

f o r In v e n t o r y

F r o n t P a n e l

M e m o r y & D u p l e xR e g i o n

B o o t & C o n t r o l R e g i o n

P h e r ip h e r a l R e g i o n

p E C LT r a n c e i v e r

B U D A / P V M AC o n t r o l b u s

S P I I n t e r f a c eM o d u l e

S h e l f & H P AA la r m /O p e n /R e s e t

P r o c e s s o r C o r e R e g i o n

S h e l f & H P AI n t e r f a c e M o d u l e

S I OR S 4 8 5

T r a n s c e iv e r

H P A I n t e r f a c e

1 F P G A M e r g e : S I M

RCPA Block Diagram

Core Control Module (CCM)

- Interrupt Control

- DMA Control

- Timer

- Control port

ESCC

- RS-232 Monitor Interface

Memory Controller

- DRam, Cache RAM, Tag RAM Control

- Cache mode control between cache RAM and DRAM

- Flash Memory Control

HDLC

- NIM2- Board Duplex

Peripheral Controller



28/83


- CSM (Cell Site Modem) ASIC or ECM ASIC Modem Chip

- CDM - CDMA Date interface Control

- SDM Self states Detecting Module (Open/Fail)

- Packet interface between PIM and MCPA

- STM System Timing

- LPA SIO LPA Interface

- SIM BUDA, PACA Interface

(2) MCPA20 (Multi-Channel Processing board Assembly 20)

MCPA20 is a board covering overhead channel (Pilot, Sync, paging and Access channel) and maximum 20

traffic channels. MCPA20 is composed of Core Control Module (CCM) interfacing with CPU (i960), ESCC in

charge of monitor interfacing through RS-232, memory controller controlling memory and peripheral controller

in charge of interfacing of peripheral devices in the board. 20 units of CSM (Cell Site Modem) ASIC

corresponding to CDMA code channel or ECM ASIC control are equivalent here.

The block diagram and main functions of MCPA20 are as follows.

C P U B U S

C H A N N E LP R O C E S S O R

i 9 6 0 C F - 4 0( I N C L U D I N G D M A )

D T MC D M A T X D a t a

I n t e r f a c e &

T i m in g

B u s & I n t C o n t r o l& S t a t u s M o d u l e

& M o n i t o r i n g P o r t& P h e r ip h e r a l

C o n t r o l

1 M x 3 2D R A M B a n k ( w / P a r i t y )

&2 5 6 K B C a c h e

P a c k e t I n t e r f a c eM o d u l e

I / O B U S

C a c h eC o n t o l l e r

( 0 - w a i t P / B u r s t )

F L A S H M e m o r y( B a c k u p m e m o r y )

3 2 1 6

1 6

3 2

H O T l i n kT r a n s m i t t e r r

I n t e r r u p t S i g n a l

B o a r d D u p l e x e L i n k( H D L C )

p E C L& C l o c k B u f

B u f f e r

P a r a l le l P a c k e t b u s I n t e r f a c ew i t h R C P A

F r o m R C P A

T i m i n g S i g .

T X D a t a

B a c k p l a n e I n t e r f a c e

C S MI n t e r r u p t s

E P R O M( B o o t & J i g )

C o n t r o l

A d d r & D a t a

I n t e r - b u sB u f & F I F O

R S 2 3 2

S t a t u s

S e r i a lE E P R O M

f o r In v e n t o r y

F r o n t P a n e l

M e m o r y & D u p l e xR e g i o n

B o o t & C o n t r o l R e g i o n

P h e r i p h e r a l R e g i o n

H O T l i n k R e c e i v e r

R D MC D M A R X D a t a

I n t e r f a c e

P r o c e s s o r C o r e R e g i o n

R X D a t a

54

32C S M G r o u p 1

( C S M 1 ~ 4 )

MCPA20 Block Diagram

Main configuration of MCPA20 is as follows;



29/83


Core Control Module (CCM)

- Interrupt Control

- DMA Control

- Timer

- Control port

ESCC

- RS-232 Monitor Interface

Memory Controller

- Dram , Cache RAM, Tag RAM Control

- Cache mode control between cache RAM and DRAM

- Flash Memory Control

Peripheral Controller

- CSM (Cell Site Modem) ASIC or ECM ASIC

- DTM - Timing & CDMA Date interface Control

- Packet Interface between PIM and RCPA

(3) BUDA (Base station sector conversion & Up/Down converter Assembly)

BUDA is mainly divided into shared part, Tx path and Rx path. The block diagram and main function of BUDA

are as follows.



30/83


D e t e c t o r

R F F r o n t b l o c k

A M P

T X _ O U TC o u p l e r

T X I F D e t e c t o r &T X A G C C I R C U I T

T X O U T D E T E C T I O N C I R C U I T

B U D A B l o c k D i a g r a m

R X

T X

I F B l o c k I F A t t . B l o c k

L o c a lO s c i l a t o r

T X I F B L O C K

B P FA T T

A M P

B P F

A T T

A M P

H O TL I N K

T OR C P A

F P G A

D A C

I Q

D E M O D

R X A

B P a t hR X B

D i g i ta l I n t e r f a c e

A G CC i r c u i t

F P G AD A C

D A C

H O TL I N K

I QM O D U L A T O R

B L O C K

F r o mR C P A

R E F I n p u t

Main Functions of Tx/Rx

- Frequency up conversion transforming baseband signal into IF/ RF signal.

- RF signal output control by gain control.

- Tx AGC (Automatic Gain Control): maintaining gains of receiving part regularly to keep its output.

- Rx AGC (Automatic Gain Control)

- IQ demodulator

BUDA (Baseband Up Down Conversion Assembly) can be explained by Tx and Rx block. Tx block A/D

transformed in BUDD (Buda Digital Daughter board) into IF signal in IQ modulator. The signal is transmitted to

LPA with frequency up conversion in RF block.

Receiving part converts the signal input from FEU (Front End Unit) in RF block into IF frequency after low-

Noise amplifying, and inputs it on IQ demodulator block to send BUDD. The converted signal into baseband is

again D/A converted and sent to RCPA or MCPA. BUDA status reporting and PLL synthesizer frequency setting

are processed in RCPA and digital interface block.

(4) PACA (Power Adjust & Control Assembly)

RF path, which can accommodate 2FA/3SECTOR, is mounted on PACA so that it uses Rx frequency

functions by FA with controlling PLL synthesizer to process Muti FA signal. PACA monitoring final Tx

output level change by converting the final output signal of the sending path to receiving RSSI electronic

power. The block diagram of PACA and its main functions are as follows;



31/83


Sensing Tx output

Temperature reading

DC power fault detection

10MHz reference signal detection

PLL synthesizer part receives control signal of the decoding circuit and generates local signal for frequency

down converting of RF signal into IF signal. PACA reports the present temperature of the board to PCPA. It

receives final Tx output signal from front end and converts it into IF signal. Then it sorts signal and reports

RSSI electronic power of interested signal to RCPA.

E E P R O M

T H E R M A LS E N S O R

1 F A G A M M AL O C A L

B P F

1 F A G A M M A P A T H

A M P

2 F A B E T A P A T H

4 W A YD I V I D E R

S A M P L E P O R T

1 F A A L P H A L O C A L

1 0 M H z

P L L A MP

P V P D - E L

P V P D - E L

2 F A G A M M A P A T H

1 F A A L P H A P A T H

1 F A B E T A P A T H


2 F A A L P H A P A T H


A T T

R C P A

A / DC O N V E R T E R

C G P S

P L L

1 F A B E T A L O C A L

S A M P L E P O R T

1 F A A L P H A L O C A L

1 F A B E T A L O C A L

1 F A G A M M A L O C A L

P A C A B l o c k D i a g r a m



32/83


(5) RCBB (Radio & Channel Bank Backboard)

RCBB is a back board of radio channel block accommodated in C-BTS.

It is designed to support max. 3 sectors.

RCBB is designed to mount 2 power packs (PSU-I), 10 MCPA20s, 2 RCPAs 2, 6 BUDAs and a PACA.

RCBB is the 16-layered multi back board with appropriate size to be mounted on the standard shelf. The

dimension is 599.5mm x 254.0mm x 3.3mm. RCBB is designed to accommodate standard boards in RCB block

of C-BTS.

Signal connecting boards in RCBB are; HOT-link signal for CDMA signal transmitting, network signal for

packet transmitting, timing signal divided into open, fail signal, system clock, even sec and sync signal in each

board, cable connecting signal to be connected with other shelves and other necessary signals..

The signals above are with specific impedance of 50 Ohm to minimize reflection and cross talk. For differential

signal, it is with specific impedance of 100 Ohm.

To avoid reflection of signal, termination resistance is mounted. In the mean time, pull-up resistance is mounted

to stabilize the signal.

3.2.2.4 LPA (Linear Power Amplifier Block)

(1) LPAU-D (Linear Power Amplifier Unit D)

LPAU-D is mounted on standard C-BTS. 6 units of LPAU-D are needed for 4 FA / 3sectors. A RCPA controls total

6 units of LPAU-D and Combiner.

LPAU-D interfaces with RCPA through combiner. The data interface method is multi-drop and it uses RS-485.

Other H/W alarm signals use TTL level.

LPAU-D receives commands - enable/disable, status request and version request - from RCPA and performs them.

On status command, it reports LPAU-D status with data interface line (control pin #1 ~ #4). LPAU-D can be

restarted by remote control signal being sent from RCPA.



33/83


The electric specification of LPAU-D is as follows;

Parameter Specification

Frequency Range 869MHz to 894MHz

RF Output Power 60Watts nominal

Gain Variation over

30 ~ 47dBm65 1.0dB

Gain Variation over Operating Temperature 65 1.0dB for 0 to 60 C

IMD/Spurious

@30W at LPAU-D output port

31dBc/30kHz BW at 750kHz offset

45dBc/30kHz BW at 1980kHz offset

DC Input **Operating Range : 24 ~ 28V

30A Maximum at 27V ( 47.8dBm)

3.2.2.5 FEU (Front-End Block)

(1) FECU (Front-End for Compact Unit)

FECU is composed of a duplexer or receiving BPF (Band Pass Filter), sending BPF (BAND Pass Filter), sending

channel filter, LNA (Low Noise Amplifier), a directional coupler and a large number of splitters. Main functions

of FECU and the block diagram of FECU is as follows;

Receiving BPF (Band Pass Filter) of the duplexer filters receiving signal only of the bandwidth it

needs.

LNA (Low Noise Amplifier) supplies receiving signal to receiving port of BUDA for each FA after

amplifying the signal as suitable one.

LNA reports its own status to BAMA.



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F E C U

4 W

S PT X F

( 2 5 M H z )

D / C

R X F

( 2 5 M H z )

4 WS P

T X I N

L N A

D / CR X F

( 2 5 M H z )L N A

R X A O U T 1

R X A O U T 2

R X B O U T 1

R X B O U T 2

R X A S a m p l e

R X B S a m p l e

P A C A 1

P A C A 2

P A C A 3

T X S a m p l e

B A D A - B F W D

B A D A - A R E V

B A D A - B R E V

A N T B( R X B )

A N T A( T X / R X )

D C / A l a r m

4 W

S PP A C A 4

P A C A 5

P A C A 6

P A C A 7

P A C A 8

D C / A l a r m

B A D A - A F W D



35/83


3.3 Configuration and Functions of S/W

3.3.1 S/W Configuration Diagram

S T A R E X - 8 0 0 S / W U

C o m p a c t - B T S

( 2 6 B l o c k s )

B S C

( 5 1 B l o c k

E C M S R C C S

E M C

E C C

E R M

E H C

E T C

E P M

E D M

E O M

E D N

E S T

E C F

E F A

E M S

E T M

R M M

R D M

M C D

M C M

R D C

R D M

R P I

R P M

P A C C

P C C

T C C

K N L

3.3 2 S/W Block Functions

3.3.2.1 ECMS (Enhanced BTS Call Control & Management Subsystem)

1) EMC (Enhance BSP Main Control) Block

EMC is the main function block of ECP and performs following functions.

- Loading each block of ECP



36/83


- Loading PLD from BSM

- Writing each block of ECP to Flash ROM

- Managing common DB of ECP S/W

2) ECC (Enhanced BSP Call Control) Block

ECC block processes BTS terminating/originating call setting, call controlling and call releasing, and main

functions are as follows;

- Setting and releasing terminating/originating calls of MS.

- Authenticating terminating/originating call.

- Collecting statistical data of call processing

- Setting and releasing Markov call.

3) ERM (Enhanced BSP Resource Management) Block

ERM block manages call processing resource and its main functions are as follows;

- Initializing call processing resource in BTS for /Managing resource status

- Allocating and releasing resource - communication channel, CDMA channel and frame offset.

- Distributing resource equally.

4) EHC (Enhanced BSP Handoff Control) Block

EHC block process handoff requests of BSC and main functions are as follows;

- Identifying handoff type: soft handoff/hard handoff.

- Processing softer/soft handoff: add/drop/swap.

- Processing hard handoff: changing frequency/frame offset.

5) ETC (Enhanced BSP Transparent message Control) Block

ETC block delivers/receives message to MS and main functions are as follows;

- Processing registration message and delivering the result.

- Processing order message.

- Processing authentication message.

- Processing data burst message.

- Notification VMS.

6) EPM (Enhanced BSP Power Management) Block

EPM block manages electric power and main functions are as follows;

- PACA initial calibration

- TPTL (Transmit Power Tracking Loop) calibration/traffic gain scaling

- Effective radiated power limiting (LPA over power estimation)



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- Blossoming/Wilting Sector

7) EDM (Enhanced BSP Device Management) Block

EDM block performs supplementary function for BTS device OAM and main functions are as follows;

- Remote H/W reset through BAMA.

- Collecting and reporting Inventory.

- Processing BAMA and BTMA keep-alive.

- Gathering BAMA dismounting faults.

- Delivering status message and control message of EDU

8) EOM (Enhanced BSP OAM Main Control) Block

EOM block manages/controls blocks in ECP and main functions are as follows;- Running/stopping EMC sub-block.

- Managing block status in ECP.

9) EDN (Enhanced BSP Downloading) Block

EDN block downloads processors in BTS. The following is its main functions.

- Downloading sub-processors - RCP, MCP - and MCP data.

- Loading block.

10) EST (Enhanced BSP Status Management) Block

EST manages status of all processors and devices in BTS and main functions are as follows;

- Managing status of processors and devices

- On-line and on-demand blocking/unblocking of over-head channel.

11) ECF (Enhanced BSP Configuration Management Block)

ECF initializes ECP and processes ECP data and main functions are as follows;

- Configuring and initializing ECP database.

- Initializing RCP and CE.

- Processing configuring/operating information.

12) EFA (Enhanced BSP Fault & Alarm Management) Block

EFA processes BTS information and main functions are as follows;

- Collecting and reporting H/W alarm from BAMA.

- Collecting and reporting S/W alarm from RCP.

- Collecting and reporting faults.



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13) EMS (Enhanced BSP Measurement & Statistics) Block

EMS processes various statistics in BTS and main functions are as follows;

- Collecting and reporting statistics; on-demand, Hourly

- Measuring and reporting processor load of ECP, handling overload; call restriction

14) ETM (Enhanced BSP Test Management) Block

ETM block tests BTS and main functions are as follows;

- Controlling BADA (Base station Test Unit)

- BTS Markov call: on-line and on-demand

- Channel element built-in test: on-line and on-demand

- Measuring VSWR.

- Mobile phone status output

- TA (Temporal Analyzer) data output

- Searcher/finger data output

- Adjusting attenuator

- Controlling sector selecting switch.

3.3.2.2 RCCS (RF & Channel Control Subsystem)

1) RMM (Rcpa Maintenance & Management) Block

RMM block is composed of RCC_MainTask and RCC_StatusTask. RCC_MainTask performs initial update of

DB by RCB configuration and channel DB conversion. If the updating is successful, RCC_MainTask generates

RCC_MctTask of RDM block and RCC_LoaderTask of MCC block. Its physical configuration manages Channel

DB and overhead channel DB is managed by FA and sector. RMM also controls channel element modem ASIC

test and deletes/adds channel cards and blocks/unblocks channel cards and channel element. RCC_StatusTask

periodically checks duplicate status of RCPA and reports the result to ECP. It automatically blocks/unblocks the

overhead channel by estimating IPC path status from ECP.

2) RDM (Rcbu Device Management) Block

RDM block manages fail/good status of STM in channel card and RCPA, and mounting/dismounting status of

channel cards by periodic monitoring their status port (every 600 msec). It also initializes/controls/manages

status of STM and CDM in RCPA. If STM initializing is successful, RDM block creates RCC_DnloadTasks in

each channel card mounted to download codes. When faults or alarm occurs, the block reports it to ECP. RDM

block also performs duplex switching function and simplex and duplex conversion function.



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3) MCD (Multi-Channel Downloading) Block

MCD Block is composed of RCC_LoaderTask and RCC_DnloadTask. RCC_LoaderTask loads channel code

from ECP and RCC_DnloadTask downloads the channel code to channel card requesting channel configuration

to ECP. At the same time, it also manages channel status. The max. 11 RCC_DnloadTasks are generated and

RCC_KaTask is generated when channel status is normal.

4) MCM (Multi-Channel Maintenance) Block

MCM Block is composed of RCC_StaticTask and RCC_KaTask. RCC_StaticTask reports on-demand and

hourly perform measuring result of frame error rate in the traffic channel to ECP for each sector and this

function. RCC_KaTask are generated max. 10 and they eschange KeepAlive message with channel card every 2

seconds. When the KeepAlive fault occurs, RCC_KaTask reloads the channel card after resetting it.

5) RDCB

RDCB is a part of DevCtlTask, and performs PLL controlling and frequency tuning of BUDA and the PACA

board, Tx Attenuation controlling of BUDA, LPA on/off controlling, and alarm recovering. As a supplementary

function, it includes DebugTask module, which supports direct user control interface.

6) RDMB

RDMB is a part of DevCtlTask. This unit senses mounting/dismounting and alarms of BUDA, PACA and LPA.

RFC operates device status in 2 methods. The first one is the event driven status report method that updates

status DB of RFC devices on special event occurring by periodical polling and reports the result to ECP. The

second one is the cyclic status report method that updates status DB of current RFC devices periodically and

reports the result to ECP.

7) RDIB

RDIB is the unit, which configures the main RFC weekly program. It delivers relevant message to each task by

initializing RFC, generating each task and communicating with RCC and ECP. It is a part of DevCtlTask and in

charge of RFC device interfacing. RDIB is composed of I/O module, which adjusts Tx gain of BUDA, controls

LPA, and inputs status of LPA on/off, and IIC module which runs PLL of UDCA through 3 wire buses.

8) RPMB

RFC main task generates Eeprom task first among tasks of RPMB. RFC reads temperature data of 0 ~ 60 degree

from PACA per 10 degree and calculates temperature data with the level of 1 degree through interpolation of 2

temperatures. If the interpolation successfully ends, RFC main task generates TrsPwrTask and WilbloTask.

TrsPwrTask calculates initial Tx power value by referencing current temperature data after reading RSSI value

from PACA, and continue to calculate current Tx power by using the weighted average by 50 ms. The current

current Tx power is the basis of all power management. With the current Tx power value, WilbloTask in RPMB



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performs wilting, blossoming, overhead power calibration, TPTL calibration, etc.

9) PACCB (Pilot/Sync and Access Channel Control Block)

Pilot Channel is forward CDMA channel from BTS. It is used for initial synchronization in MS and provides

frame synchronization when MS receives sync channel and standard pulse on demodulating. Sync channel is

also forward channel from BTS and used at the system acquisition level. Once MS detects the system, sync

channel doesnt need to be re-used until the power is on again. Access Channel is backward channel used when

MS attempts to access to BTS and fixed to 4800 bps of information transmission rate.

10) PCCB (Paging Channel Control Block) S/W

Paging Channel is from BTS. When MS receives system information, command or paging information for the

entire or certain MS, or access request by MS, it processes these by receiving reply messages.

11) TCCB (Traffic Channel Control Block) S/W

The following figure shows block configuration of TCCB.

Main functions are as follows;

- Performing required processing for call allocation

- Encoding signal received from SVC (Selector/Vocoder) to transmit to MS

- Transmitting data sent from MS to SVC

- Detecting signal sent from MS

- Sending/receiving necessary message for ECP/call allocation



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M A I N B l o c k

P a c k e t R o u t e r

( f r o m / t o S V C , E C P )

T X B l o c k

M O D E M D r i v e r

( A I R i n t e r f a c e )

S E A R C H

B l o c k

R X B l o c k

. S e n d i n g S V C d a t a t oO T A

. S e n d i n g T i m e _ s y n cp a c k e t t o t h e m a i nb l o c k

. S e n d i n g M S d a t a t oS V C

. S e n d i n g T i m e _ s y n cp a c k e t t o S V C

. M u l t i p a t h s i g n a ld e t e c t i n g

. C a l l a l l o c a t i o n

. A l l b l o c k s c o n t r o la n d m a n a g e m e n t

. D a t a e x c h a n g e w i t h

E C P. S V C c o n t r o l d a t ap r o c e s s i n g

12) KERNEL Block

- Initialization

- Diagnostic

- I/O interface

- Low-level driver

- Utilities and Libraries



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3.4 Call Control

Call control function of STAREX-800 BTS processes originating/terminating call of MS, various events and call

releasing by interworking with BTS channel element and CCP of BSC. Originating/terminating call processing

procedure is briefly explained here in.

3.4.1 Originating call processing procedure

1) When the subscriber inputs termination number and presses the SEND key, MS transmits origination

message that requests level 2 reply message for BTS origination service through AC (Access Channel).

(imsi : Mobile Address, svc_opt : Service Option, dgt : Called Digits)

M S E C PC E C C PC S B

m s _ o r g _ m s g

m s _ o r g _ m s g

b s _ a c k _ o r d e r

M o b O r g _ B 2 C

( i m s i , e s n , s v c _ o p t , d g t )

2) ECP, which received origination message through AC, searches message and then sends MobOrg_B2C to

CCP notifying originating call occurrence. CCP is the control processor of BSC. At this point, ECP sends base

station acknowledge order message through paging channel originating to MS which confirms message

receiving.

3) CCP, which received origination message (MobOrg_B2C) the origianting call setting message, allocates

available vocoder by referring to 1st and 2nd frame off-set information delivered and allocated by BTS. CCP

transmits setup message which includes call setting information such as called party BCD number (digit

information dialed by the terminal user) to the switching system. When CCP allocates the vocoder resource, it

allocates minimum load resource and does not allocate same frame offset at the same vocoder card.



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M S M S CC C PC S BE C PC E

A s s g n R e q _ C 2 B

( f r a m e o f f s e t )

t c _ m o b _ m s gN u l l T r a f f i c

P r e a m b l e

A s s g n R e q _ M 2 C

( c i c )

A s s g n R s p _ B 2 C

A s s g n R s p A c k _ C 2 B

t c _ a s s g n _ a c k

p c _ c h _ a s s g nc h _ a s s g n _ m s g

p c _ c h _ a s s g n _ a c kV s T c L i n k _ C 2 S

T i m r S y n c .T i m e S y n c .

N u l l T r a f f i c

s e l _ l k _ o n

v s _ m o b _ a c q _ c t lt c _ a c k _ c t l


m s _ a c k _ o r d e rs o _ r e q u e s t

s o _ c o n n e c t

s o _ c o m p l e t eT c L i n k A c t _ S 2 C

A s s g n C m p l _ C 2 M

4) MSC receives assignment request message (AssgnReq_M2C) which requests configuration of wireless

channel resource connecting.

5) When CCP receives the assignment request message, it requests wireless channel allocation such as TC

(Traffic Channel) or code CH by transmitting the assignment request message (AssgnReq_C2B) including

allocated frame off-set information to ECP,

6) ECP selects usable TC with using received frame offset information and sends it to CCP by using assignment

response message (AssgnRsp_B2C) with allocating code CH.

7) CCP, which received reply message for the resource allocation request from ECP, notifies the confirmation

with AssgnAck_C2B message.

8) ECP, which received final AssgnAck_C2B, notifies allocation to TC/PC and receives allocation confirmation

from each of them.

9) The allocated TC starts transmitting null data. PC transmits channel assignment message, which includes

allocated code CH and frame offset, to MS through PC of CAI for wireless traffic channel setting.



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10) MS, which received channel assignment message, synchronizes to the forward traffic with included

information, and transmits preamble data through the backward traffic channel after sensing null data reception.

The data is used for the backward communication channel synchronization of TC in BTS.

11) Aligning with 7~10 procedure, CCP requests TC link setting to SBP by using VsTcLink_C2S, which

includes TC address and frame offset value allocated and notified by BTS.

12) The vocoder in SVCS of allocated BSC and BTS call channel complete TC link setting by delivering time

synchronization message to each other. In this case, the time synchronization is not needed due to packet system

of STAREX-1900 using CINU.

13)The call channel sends sel_lk_on message, which notifies link setting between the vocoder and call channel

to ECP, and also sends vs_mob_acq_ctl message, which notifies gaining of the backward call to SVCS and

receives reply message.

14) SVCS transmits the base station acknowledge order message to check whether link setting is properly set or

not by the set link. In this case, if BTS gains the backward call channel, SVCS transmits the message requesting

level 2 reply.

15) MS transmits the mobile station acknowledge order message as a reply for the base station acknowledge

order message. Then MS-SVC takes service option negotiation procedure.

16) When call channel setting is completed, SBP reports it to CCP through TcLinkAck_S2C. CCP notifies the

allocation completion of the wireless channel resource by transmitting the assignment complete message to

MSC.

M SP C X

( V L R )C C PC S BE C PC E

A l e r t i n g _ M 2 C

A l e r t i n g _ C 2 SR i n g B a c k T o n e ( i n _ b a n d )

C o n n e c t _ M 2 CM o b C o n n _ C 2 S

C o n n e c t A c k _ C 2 M

17) During termination setting procedure, originating MSC receives the notification receiver is ringing and

notifies it to CCP by alerting message. In this case, the progress indicating information elements (option



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information elements) displays whether call progress information is transmitted as in-band by tone or displayed

by outer message. If the information element does not exist, it is regarded as in-band provisionally.

18) CCP transmits the alerting message to SVCS and the originating MS receives the ring back tone sent from

the switching system by in-band.

19) If a call receives subscribers reply, the ring back tone is stopped and MSC connects the wire line to the

terminating side and then configures the communication path by transmitting connect message to CCP.

20) When CCP receives the connect message, it transmits MobConn_C2S message to SVCS. In this case, CCP

notifies by-pass Mode (M-To-M) or transcoding mode (Mobile-to-Land) to SBP for vocoding mode. The

vocoder operates as by-pass mode, in case the vocoding mode is mobile-to-mobile call.

3.4.2 Terminating Call Processing Procedure

1) MSC switching system transmits the paging request message to the relevant CCP for terminating call setting

and runs the paging timer.

M S E C PC E C C PC S B

p a g e _ m s gp c _ p a g e _ m o b

p a g e _ m o b _ r s p

G e n P a g i n g _ C 2 B

M S C

P a g i n g _ M 2 C

p a g e _ m o b _ r s p

P a g e M o b R s p _ B 2 CP a g e R s p _ C 2 M


2) When CCP receives the paging request message, it transmits the paging request message to the corresponding

ECP. In this case, the first paging request uses the zone list paging method is used for the second paging request

and the system paging method is used for the second paging request.

3) When ECP receives the paging request message, it transmits the paging request message including MS

address through PC (Paging Channel).

4) MS replies to the page request by transmitting the page response message to AC (Access Channel).



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5) When ECP receives the page response message, it searches the message and then transmits the

PageMobRsp_B2C message to CCP to notify the reply of MS.

6) When CCP receives the PageMobRsp_B2C massage, the reply message of receiving call, it delivers the page

response message to the switching system by allocating usable vocoder resource referring to frame off-set

information delivered and allocated by BTS. If CCP finds that the call is the test one of BSM by referring the

service option of paging reply call, it performs the test call process procedure without delivering it to the

switching system.

M SP C X

( V L R )

C C PC S BE C PC E

A s s g n R e q _ C 2 B

t c _ m o b _ m s gN u l l T r a f f i c

P r e a m b l e


( c i c )

A s s g n R s p _ B 2 C

A s s g n R s p A c k _ C 2 B

t c _ a s s g n _ a c k

p c _ c h _ a s s g nc h _ a s s g n _ m s g

p c _ c h _ a s s g n _ a c kV s T c L i n k _ C 2 S

T i m r S y n c .T i m e S y n c .

N u l l T r a f f i c

s e l _ l k _ o n

v s _ m o b _ a c q _ c t l

t c _ a c k _ c t l


m s _ a c k _ o r d e rs o _ r e q u e s t

s o _ c o n n e c t

s o _ c o m p l e t eT c L i n k A c t _ S 2 C

A s s g n C m p l _ C 2 M

7) MSC transmits the assignment request message requesting wireless channel resource allocation to CCP.

8) When CCP receives the assignment request message, it requests the wireless channel allocation such as TC

(Traffic Channel) and code CH, by transmitting the assignment request message including frame off-set value

usable in the allocated vocoder to ECP.

9) ECP selects the usable TC with received the frame off-set value, allocates code CH and transmits to CCP by

using the assignment response message.

10) When CCP receives AssgnRsp_B2C, it confirms ECP by AssgnAck_C2B.



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11) When ECP receives the final AssgnAck_C2B, it notifies allocation to TC and PC and checks the allocation in

each.

12) The allocated TC starts the null data transmitting and PC transmits the channel assignment message

including code CH and frame off-set to MS through PC of CAI for wireless traffic channel setting.

13) When MS receives the channel assignment message, it synchronizes to the forward traffic channel with

included information, and transmits the preamble data through the backward traffic channel by sensing null data

reception. The data is used for the synchronization of TC in BTC to the backward communication channel.

14) Aligning with 10~13 procedure, CCP requests TC link setting to SBP by using the VsTcLink_C2S message

including the TC address and the frame off-set value.

15) The vocoder in SVCS of allocated BTS and the BTS call channel complete TC link setting by delivering

time synchronization message to each other. In this case, the time synchronization is not needed due to packet

system of STAREX-1900 using CINU.

16) The call channel transmits the sel_lk_on message, which notifies link setting between the vocoder and call

channel to ECP, and sends the vs_mob_acq_ctl message, which notifies gaining of the backward call, to SVCS

and receives the reply message about them.

17) SVCS transmits the base station acknowledge order message to check whether link setting is properly set or

not by the set link. In this case, if BTS gains backward call channel, SVCS transmits the message requesting

level 2 reply.

18) MS transmits the mobile station acknowledge order message as reply of the base station acknowledge order

message. Then, MS-SVC takes service option negotiation procedure.

19) When call channel setting is completed, SBP reports it to CCP through TcLinkAck_S2C. CCP notifies the

allocation completion of the wireless channel resource by transmitting the assignment complete message to

MSC.



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M S M S CC C PC S BE C PC E

A l e r t i n g _ C 2 M

A l e r t i n g _ C 2 S

C o n n e c t _ C 2 MM o b C o n n _ S 2 C

C o n n e c t A c k _ M 2 C

A l e r t A c k _ S 2 C

C o n n A c k _ C 2 S

a l e r t I n f o ( r i n g _ o n )

m s _ a c k _ o r d e r

c o n n e c t o r d e r

20) SVCS transmits the alert info to notify ringing to MS and MS replies to the alert message by transmitting the

mobile station acknowledgement message to SCVS.

21) CCP sends alert message to MSC to notify ringing of the terminating side during the terminating setting

procedure.

22) On receiving of receivers reply to the call, the connect order message which needs confirm reply is

transmitted by MS.

23) When CCP receives reply to the call from the receiving MS, it transmits the connect message which notifies

reply of receiving side to MSC.

24) When MSC receives the connect message, it transmits the connect acknowledge message as reply of

receiving and CCP transmits the ConnAck_C2S message to SVCS. In this case, CCP notifies by-pass Mode (M-

To-M) or transcoding mode (Mobile-to-Land) to SBP for vocoding mode. The vocoder operates as by-pass

mode, in case the vocoding mode is mobile-to-mobile call.



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3.4.3 Call Releasing Procedure

3.4.3.1 Call Releasing on Originating Side

M S C S B C C P M S CE C PC E

R e l e a s e O r d e r


R e l e a s e M s g

R e l e a s e A c k M s gR e l e a s e _ S 2 C

R e l e a s e _ C 2 M

R e l C o m p _ M 2 C

R e l C o m p _ C 2 S

R e l e a s e _ C 2 Bc c _ c a l l _ r e l

R e l e a s e _ C 2 B

1) MS starts call releasing with transmitting the release order message through the backward traffic channel.

2) SVCS of CSB (CDMA Selector Bank) stops call connecting, transmits the release order message to MS

through the forward traffic channel as a reply to the release order message of MS, and notifies call releasing byMS to CCP.

3) CCP transmits RelComp_C2S, the reply for the release message, to SBP, and the release message to MSC to

start call releasing process. Then it sends release message to ECP, and runs the call releasing timer.

4) MSC releases the call resource and transmits the release complete message to CCP. When CCP receives the

message, it stops the call releasing timer.

5) When the entire release complete messages are received by MSC and ECP, CCP releases wireless call

resource. If the receiving is not completed, it performs the call releasing procedure two times more and then

withdraws the resource.



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3.4.3.2 Call Releasing by Network

M S C S B C C P P C XE C PC E



R e l e a s e M s g

R e l e a s e A c k M s g

R e l e a s e _ S 2 C

R e l e a s e _ C 2 M

R e l C o m p _ M 2 C

R e l C o m p _ C 2 S

R e l e a s e _ C 2 Bc c _ c a l l _ r e l

R e l e a s e _ C 2 B

1) MSC transmits the release message to CCP to release the call and runs the call releasing timer.

2) When CCP receives the release message regarding call releasing occurrence from MSC, it transmits the

release complete message to MSC and transmits the release message to SVCS.

3) When SVCS receives the release message, it starts call recovery by transmitting the release order message to

MS through the forward traffic channel.

4) When MS receives the release order message, it transmits the message to the backward traffic channel as a

reply.

5) When MSC receives the release complete message from CCP, it releases wire resource.

6) When CCP receives the release complete message of call recovery starting by MS from SVCS, it transmits the

Release_C2B message to ECP and releases wireless resource.



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3.5 Handoff Control Function

The handoff control function of STAREX-800 BTS interfaces with BSC to support all types of handoffs

provided by STAREX-800 system.

The type of handoff is decided by CCP, and it assigns or draws back TC according to this. MS measures the pilot

strength of PN offset in the neighbor list and transmits PSMM (Pilot Strength Measurement Message) to CCP.

CCP determines softer handoff, soft handoff, hard handoff, etc., based on PSMM (Pilot Strength Measurement

Message) transmitted from MS.

ECP receives handoff request differently and handles each differently according to the types of handoff. ECP, as

to the softer handoff handling, receives a request from TCE (Traffic Channel Element) and assigns one more

walsh code only. In case of handling soft handoff and hard handoff, ECP receives a request from CCP and

assigns a new TCE.That ECP assigns resources in performing soft handoff is different somewhat from a normal common call. In

case of a common call, it consults as to the frame offset decided by CCP up to three times maximum to distribute

load as to the frame offset. But, in case of a soft handoff, ECP assigns the corresponding frame offset without

consulting as to the frame offset designated by CCP. However, in case ECP could not allocate the corresponding

frame offset, it mishandles soft handoff. And, it makes CCP to perform hard handoff.

3.5.1 Softer Handoff

Softer handoff is made with three procedures, that is, add cell, drop cell, swap cell.

3.5.1.1 Add Cell

1) If, of the pilot offset list that MS has, the strength of the pilot included in the neighbor set is in excess of

T_ADD, then MS sends pilot strength measurement message (PSMM) to SVC (Selector Vocoder Card).

2) After SVC receives PSMM, the result is softer handoff, it transmits tc_sftr_ho_ctrl_msg which orders add

pilot to the corresponding TCE.

3) TCE sends softer handoff request message that requests resources allocation from ECP for the handoff

requested.

4) ECP assigns resources for handoff, and reports it to TCE. ECP which received softer handoff requset of TCE

assigns code channel to use to the corresponding handoff, and sets up forward TX gain, and sends channel assign

message in which assign_type is HA_SOFTER_HO to TCE, and then activates timer.

5) After ECP receives Call_status_Message from TCE in SFTR_HO_W_4_TC_SETUP status, if receiving

Call_status_Message from TCE in SFTR_HO_W_4_OTA_TX status, then it releases timer to finish add pilot



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(add sector) procedure of the softer handoff flow.

3.5.1.2 Drop Cell

1) If, of the pilot offset list which Mobile has, the strength of the pilot included in the active set falls below

T_DROP, Mobile activates handoff drop timer, and even after the termination of timer, if the strength of the pilot

is still below T_DROP, then it sends PSMM to SVC.

2) SVC, which received PSMM judges that pilot, was dropped, and it sends handoff direction message to

Mobile.

3) Mobile performs handoff flow, and sends handoff completion message, and SVC which received the message

sends a message that requests a release of the sector of the corresponding pilot to TCE.

4) TCE sends handoff completion message to ECP.

5) If ECP receives CC_HO_CMPL_MSG reporting handoff completion from TCE during the softer handoff,

then it draws back code channel being used for handoff.

M S S B P / S V CE C P C C PT C

A D D P R O C E D U R E

H A N D O F F D I R E C T I O N M E S S A G E ( C A I )

H A N D O F F C O M P L E T I O N M E S S A G E ( C A I ) H O f f C m p l _ S 2 C ( S O F T E R A D D )

P S M M _ S 2 C

H o f f A s g n _ C 2 S ( S O F T E R _ A D D )

P I L O T S T R E N G T H M E A S U R E M E N T M E S S A G E ( C A I )

t c _ s f t r _ h o _ c t l

v s _ a c k _ c t l

s o f t e r _ h o _ r q s t _ c t l

t c _ m o b _ a s g n

v s _ s f t r _ h o _ r s p _ c t l

t c _ a c k _ c t l

D R O P P R O C E D U R E

H O f f C m p l _ S 2 C ( S O F T E R _ D R O P )

H o f f A s g n _ C 2 S ( S O F T E R _ D R O P )

t c _ s o f t e r _ h o _ c o m p l e t e _ c t l

v s _ a c k _ c t l

c c _ h o _ c m p l

P I L O T S T R E N G T H M E A S U R E M E N T M E S S A G E ( C A I )P S M M _ S 2 C

H A N D O F F D I R E C T I O N M E S S A G E ( C A I )

H A N D O F F C O M P L E T I O N M E S S A G E ( C A I )

SOFTER HANDOFF SCENARIO (ADD, DROP)



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3.5.1.3 Swap Cell

1) If of the pilot offset list that Mobile has, the strength of the pilot included in the neighbor set is in excess of

T_ADD, and at the same time, the strength of the pilot offset included in the active set falls below T_DROP, then

it activates handoff drop timer, and if the strength of the pilot is still below T_DROP even after the termination

of the timer, Mobile sends PSMM to SVC through TCE.

2) SVC compares the pilot chosen as a candidate and the pilot to be dropped, and if they are softer handoff, then

it sends a message that orders swap pilot to the corresponding TCE.

3) TCE sends CC_SFTR_SWAP_RQST_MSG that requests TC swap from ECP for the handoff requested.

4) If ECP receives swa

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STRAEX800_CBTS_LPA(010619).doc