07 Tm2106euo1 Eg0001 CDMA Procedures(Modified)

8/12/2019 07 Tm2106euo1 Eg0001 CDMA Procedures(Modified)

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System Procedures Siemens

System Procedures

Contents

1.1

1.1.1

1.1.2

1.1.3

2.1

2.22.3

2.3.1

2.4

2.4.1

3

Mobility Managment

The Registration function

The De-Registration function

MS Inactive function

Call Processing

Moi!e Station Initia!i"ation StateMoi!e #riginating ca!!

Moi!e #riginating ca!! re!ease

Moi!e Terminating ca!!

Moi!e Terminating ca!! re!ease

Handoff

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Siemens System Procedures

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1 Mobility Managment

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1.1 Mobility Management

This function is deve!o,ed in !ine ith the s,ecia!ty of moi!e ommunication netor/and meets the s,ecia! re0uirements of moi!e communication.

1. The Registration function

2. De-registration function

2. MS inactive function

hen a registered roaming MS is confirmed to e inactive the MS5R i!! initiate anMS inactive o,eration to re!ease the resources occu,ied y such suscrier

The main signa!ing invo!ved6

1.REGNOT

it initiates from 5R to 75R Re,ort the ne registration !ocation of MS andmeanhi!e a,,roves MS and ac0uires the ,rofi!e of MS.

2. REGCN

75R sends to the origina! 5R that the ms e!ong to Re,ort that the former!yregistered MS is eyond its service.

3. CN!EN

5R sends to the 75R it Denys de!eting ms8s data from dataase

". M#$NCT

5R notices to the 75R that the ms is inactive 9sto, activities:

1.1.1 T%e Registration f&nction

a: hen the ;S receives the registration re0uest from the moi!e station it sends a5ocation ),date Re0uest message to the current service system 9MS5R2: to start theregistration ,rocess.

: The current service system sends the registration notification message R(*


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f: If the registration is successfu! MS5R2 i!! send the 5ocation ),date >cce,tmessage to the ;S indicating the successfu! registration of MS.

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1.1.2 T%e !e(registration f&nction

a: The serving MS5R determines to ,erform de-registration ased on the MS=sshutdon 9,oer off: indication.

: The serving MS5R de!etes a!! the records of the invo!ved MS and sends theMSIT message ith the cance!!ed registration ty,e ,arameters to the 75R.

c: The 75R de!etes the ,ointer that ,oints to the MS5R from the MS data and sendsa nu!! MSIT to the MS5R to confirm o,eration.

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1.1.3 M# $nacti+e f&nction

hen a registered roaming MS is confirmed to e inactive the MS5R i!! initiatean MS inactive o,eration to re!ease the resources occu,ied y such suscrier.

a: hen a registered roaming MS is confirmed to e no !onger active the MS5Rmar/s the MS as deactivated and sends the MSIT message to the 75R.

: The 75R sets the MS as deactivated de!etes the ,ointer of the MS5R and thensends the msinact to the MS5R to confirm the o,eration.

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2 Call Processing

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2.1 C// PROCE##$NG

In getting to a traffic channe! a moi!e station goes through severa! states6

1. System initia!i"ation

2. System id!e state

3. System access

4. Traffic channe! state.

1. #ystem initiali0ation state

The moi!e ac0uires a ,i!ot channe! y searching a!! the P< #ffsets ,ossii!ities andse!ecting the strongest ,i!ot signa!. #nce the ,i!ot is ac0uired the sync channe! is ac0uiredusing the 32 a!sh function and the detected ,i!ot channe! then the moi!e otains the

system configuration and timing information.

2. T%e system idle state

here it monitors the ,aging channe!.

3. T%e system access state

If a ca!! is eing ,!aced or received the moi!e enters this state here the necessary,arameters are e@changed. The moi!e transmits its res,onse on the access channe! and

the ase station transmits its res,onse on the ,aging channe!.

". T%e traffic state

Is intered hen the access attem,t is successfu!.

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2.2 Mobile #tation $nitiali0ation #tate

The Moi!e Station Initia!i"ation State consists of the fo!!oing sustates6

#ystem !etermination #&bstate

In this sustate the moi!e station se!ects hich system to use.

Pilot C%annel c&isition #&bstate

In this sustate the moi!e station ac0uires the Pi!ot hanne! of a DM> system.

#ync C%annel c&isition #&bstate

In this sustate the moi!e station otains system configuration and timing information for aDM> system.

Timing C%ange #&bstate

In this sustate the moi!e station synchroni"es its timing to that of a DM> system.hi!e in the Moi!e Station Initia!i"ation State the moi!e station sha!! u,date a!! activeregistration timers

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2.3 Mobile Originating Call

1. >fter dia!ing the ca!!ed numer the MS sends AoriginationB message on the >ccess

channe!.

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2. The ;TS res,onds y setting u, traffic channe! and transmitting After that the ;TS sends a Achanne! >ssignmentB message to the MS over a Paging

channe! te!!ing the MS hich traffic channe!s to use during the ca!!.

4. The MS sets u, the traffic channe! and egins sending ,ream!e information.

'. The ;TS sends a A;ase Station >c/no!edgmentB message to the MS through theforard traffic channe!

$. The MS starts transmitting A


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2.3.1 Mobile Originating Call release

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hen MS Detects re!ease function it6a: Sends re!ease order on reverse traffic channe!

: The ;TS sends a!so re!ease order on forard traffic channe!c: The Moi!e enters System Determination Sustate of initia!i"ation state

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2." Mobile Terminating Call

1. To receive a ca!! the ;TS uses the ,aging channe! to send a A,ageB message to theMS hich notifies it that it has a ca!!.

2. The MS res,onds y sending a ,age res,onse message to the ;TS via the accesschanne!.

3. The ;TS sets u, forard and reverse traffic channe! to e used during the ca!!.

4. The ;TS a!so egins time synchroni"ation ith the MS y sending A


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2.".1 Mobile Terminating Call release

hen ;TS Detects re!ease function it6a: Sends re!ease order on Eorard traffic channe!: The MS sends a!so re!ease order on Reverse traffic channe!c: The Moi!e enters System Determination Sustate of initia!i"ation state

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3 Handoff

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Implementation Of Soft Handover

Eortunate!y the signa! structure of DM> is e!! suited for the im,!ementation of softhandover. This is ecause in the u,!in/ to or more ase stations can receive the samesigna! ecause of the reuse factor of one? and in the don!in/ the moi!e station cancoherent!y comine the signa!s from different ase stations since it sees them as Fustadditiona! mu!ti,ath com,onents. This ,rovides an additiona! enefit ca!!ed macro diversity9i.e. the diversity gain ,rovided y the rece,tion of one or more additiona! signa!s:.

> se,arate channe! ca!!ed ,i!ot is usua!!y used for the signa! strength measurements forhandover ,ur,oses.

In the don!in/ hoever soft handover creates more interference to the system sincethe ne ase station no transmits an additiona! signa! for the moi!e station. It is ,ossi!ethat the moi!e station cannot catch a!! the energy that the ase station transmits due to a!imited numer of R>G( fingers. Thus the gain of soft handover in the don!in/ de,endson the gain of macro diversity and the !oss of ,erformance due to increased interference.

In the u,!in/ the moi!e station signa! is received y the to ase stations hich after

demodu!ation and comining ,ass the signa! forard to the comining ,oint ty,ica!!y tothe ase station contro!!er 9;S:. In the don!in/ the same information is transmitted viaoth ase stations and the moi!e station receives the information from to ase stationsas se,arate mu!ti,ath signa!s and can therefore comine them.

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07 Tm2106euo1 Eg0001 CDMA Procedures(Modified)

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