WIRELESS INTELLIGENT NETWORK(WIN)FOR GSM

Mr. NIMAY CHANDRA GIRI, M-Tech

CONTENTS• OBJECTIVE

• INTRODUCTION

• CONNECTION OF WIN WITH GSM NETWORK

• WIN ARCHETECTURE

• CALL FLOW MODEL

• CALL FLOW CONTROL BY WIN

OBJECTIVE

Design call flow and control model in Global System for Mobile (GSM) network through

Wireless intelligent network (WIN).

IN mainly two types(AIN & WIN) as depend on network connection(wire line or wire less)

AIN used for fixed network(PSTN)

WIN used for mobile network(ISDN/IN)

INTRODUCTION TO WIN & GSM Wireless Intelligent Network (WIN) means “Intelligence” is taken out

from Switching center to connect computer nodes for reliableoperations.

WIN is a separate & independent network for both mobile and fixednetwork.

SS7 used in Telecom network like PSTN,ISDN & IN.

IN/WIN is a value added system.

Applications are-call control, service control & connection control.

GLOBAL SYSTEM FOR MOBILECOMMUNICATIONS(GSM):-

GSM developed by the ETSI to describe 2G digital cellular networks.

GSM standard was developed as a replacement for 1G analognetworks.

GSM expanded to include data & voice communications, furtherimprovements were 3G & 4G systems.

GSM components are BTS,BSC,MSC(HLR,VLR,AUC),PSTN,ISDN&IN.

Connection of IN/WIN with GSM network

CALL FLOW MODEL WIN ARCHETECTURE

CALL FLOW CONTROL BY WIN Subscriber-A (calling party) dials the MSISDN(telephone no.) of subscriber –B (MSC)

The signaling connection established between subscriber-A to GMSC through PSTN step#1

The GMSC receives the dialed number & find out the type of call and sent a inquiry MSISDN to HLR (step#2) & HLR recover address of subscriber-B (i.e. from VLR) step#3

Data base (HLR) sent a inquiry (IMSI) number to MSC for equipment identify & area location MS –B (called party) step#4

VLR ask to MSC to reserve this dialed number step#5

MSC sent a mobile station roaming number(MSRN) to HLR for proceeding the call step#6

After conform of call oriented operation HLR sent request (MSRN) to GMSC for connection of call party –A to B step#7

After receiving MSRN from MSC , GMSC create a direct path to MSC by MSRN to set-up call in between subscriber-A & subscriber-B step#8

Call set-up completed. After the MS-B answer, speech connection is established & MS-B start ringing.

IN is used to control the call ,connection the call, call filtering, carries user voice and data traffic from source to destination & value added service to network by the protocol.

All process are done by signaling system no.7 (SS7), it has also capability to initiate & terminate the incoming call.

IN Standards &capability set (cs)Q.1200 – Q.1208 IN-CS (service as call

control)

Q.1210 – Q.1219 IN-CS1 (services as call forwarding)

Q.1220 – Q.1229 IN-CS2 (services as Conference calling, Call Hold, transfer and waiting.)

Q.1230 – Q.1238 IN-CS3 ( services as Inter-Network Service indicator

Q.1240,1244,1248.1 IN-CS-4 (services as Multiple points of control)

ADVANTAGES• Takes less delivery time for services

• Fast services creation and termination

• Network is more stable

• Deliver high volume of data

• Can manage large no of devices application

CONCLUSION There are two overall standards employed today – CAMEL( up to 3G&4G)

and WIN( up to 2.5G/3G)

Wireless Intelligent Networking allows the service provider to rapidly

introduce new services

IN/WIN network is a fully independent network

Maintaining and monitoring the Common Channel Signaling (CCS)

network is critical to its success

Understanding and troubleshooting the SS7 protocol is a key part of that

success

Features controlled out side the switch.

THANK YOU