WIRELESS INTELLIGENTNETWORKS

BY

CHANDRA SHEKHAR VERMA

Definition

• Wireless intelligent networks is a concept built by the telecommunications industry association

• The aim of this committee is to drive intelligent network capabilities based on interim standards(IS41) to wireless networks

• IS41 is the standard used by service providers to facilitate roaming

• This would make IN wireless without present infrastructure going obsolete

Overview

• In 1980s few people possessed cellular• Today 69 mn have them and half of them

subscribe digital services• Now the subscribers don’t settle for static-filled

connections, when a person buys a new cellular or PCS (personal communication services) caller ID and voice msgg. services are pre-installed

• The rapid creation and deployment of IN has enhanced the wired networks and now the need is to replicate it into the wireless networks

Advantages of WIN

• Multivendor product offerings that foster competition

• Uniform services to customers across service areas

• Efficient network utilization

• Rapid services creation and employment

Unique service requirements of WIN :roaming

• Mobility dictates the need for technology that enables talk between different networks

• Customers nowadays want the same voice activated services they relish in their home networks when they are out in other circles on some errands

• In the non intelligent networks roaming would simply require routing connecting and then disconnecting

• while in a wireless network messages have to be sent(SS7) back and forth b/w various devices

• Intelligent networking is required for reciprocation of bills and various validations in WI networks

Carrier select

• Wireline customers don’t have a choice of carrier but wireless customers do.

• Wireless providers are making agreements among themselves as they occupy different markets

• So a provider can by codes or automatic handset selection make the call done through desired network

• This service could be used to save money by both the subscriber as well as provider

• Carrier select requires IN messaging

Hands free operation

• This is the most sought after service today• Voice activated calling is the most important of this kind• The n/w migrates to using intelligent networking to route

the call to IP devices that provide the special tech. such as voice recognition which is required for hands free voice controlled systems

• An IN application sends mesg. To the device, turns it on, translates the digits, removes it from the telephone ckt. And lets the call go on.

• As a result an IN app. Is an efficient utilization of intelligent peripheral facilities.

Fee structure

• Calls are handed off among n/w, after the call is handled properly, billing takes place.

• IN flags can be directly written into the call record so that billing reflects specific call handling.

• Using an IN flag in billing record makes processing fees between carriers much easier

• Wireless cos have always paid to wired cos for the calls made beyond their reach but after TIA act of 1996 billing can go both ways

• Providers also offer services such as calling party pays to make it easier for a wireless subscriber to receive calls at no charge but this would require a more centralized WIN

Data service capabilities

• Apart from making calls the customers can even send various type of messages

• One such type is SMS (short messaging service) much like a pager

• SMS requires many SS7 msgs just to set up the signaling and the mechanism to get the data through the wireless network

• SMS can also be received during a call and this requires IN routing and authentication and is a complex process

Hands free: voice controlled services

• Voice-controlled services employ voice-recognition technology to allow the wireless user to control features and services using spoken commands, names, and numbers.

• There are two main types of automatic speech recognition (ASR). Speaker-dependent requires specific not train the system.

Examples

• Voice controlled dialing

• Voice controlled feature control

• Voice based user identification implemented by the ASR

• Incoming call restriction control

• Calling name presentation

• Password call acceptance, selective call acceptance

).

Data capability

• SMS

• Speech to text conversion using ASR device

• Billing or prepaid cellular

• May use debit , credit, smart cards

WIN

Functional components of WIN

• WIN mirrors the mode of wired IN• Difference lies in the movement not actually the

phone call• In the IN the SSP is switching portion of the

network, in the WIN the MSC (mobile switching centre) does the job

• The SCP (service control point) provides a cenralized element in the network

• Higher level services can be moved from MSC and processed here

Components

• intelligent peripheral

• Signal transfer point

• Location registers

• Visitor location register

• HLR (home location register)

• WIN call model which enables the n/w to handle new triggers and TCAP (transaction capability application part)

Steps in order to achieve WIN

• Incorporation of SCP, IP, into wireless n/w architecture

• Evolution of MSC to SSP

• Separation of call control and transport from service control

• Development of generic call models, events, triggers points

A stand alone HLR

• With the increase of subscriber base n/w can be expanded cost effectively with a sa-HLR

• When a provider migrates to a sa-HLR taking it off MSC putting it on an IN n/w node MSC can be dedicated to efficient cell processing reducing complexity

MSCs

• MSCs are switches containing a certain amount of processing power. An HLR performs computation, not switching.

• When the HLR is taken out of the MSC to be a network entity, more processing power is freed up in the MSC for telephone calls—its primary function

• To provision an MSC with subscribers (if each one has its own built-in HLR), it is necessary to put the data in each one, and each one has a different look and feel.

• With a unified HLR platform, there is only one provisioning mechanism for the HLR database with a standard protocol.

ADV. Of IN

• There are several other advantages of IN–based centralized service control, including the following: reduced delivery time for services, reduced network component costs As the HLR becomes a separate element in the network,

• it starts to look more like an SCP. The SCP and HLR functions merge, and an SCP/HLR in the network (like DSC's HLR) is the next logical step

Current status of WIN standards

• When the HLR was internal to the MSC, it did not have to follow the IS–41standard.

• In the present time the HLR is taken out of the MSC/VLR and moved onto the network, it must follow IS–41.

• henceforth, the stand-alone HLR can be viewed as the initial implementation of IN architecture

MSCs and IS

• Many MSCs in wireless networks have already deployed enhanced services.

• However, to ensure success in a competitive, multi network environment, these services will eventually migrate to an IS–41 implementation.

• IS–41 allows providers to deploy new features with the same user interface because the standards will dictate that all vendors provide a compatible product.

• IS–41 also will allow a provider's customer to roam or move to a different switch; its implementation will allow for seamless service in the provider's entire service area, independent of the equipment manufacturer.

THANK YOU