IN services

munchdrabNetworking and Communications

Oct 30, 2013 (3 years and 9 months ago)

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Teleservices

Bearer Services

Supplementary

Services

GSM Phase 1/2
Services

Services



ISDN
-
oriented



Mobile specific services



& modifications

Fig. 1 (TM2100EU03TM_0001 GSM Services, 3)

TE

(MS
)

GSM network

Interworking

Function IWF

Transit network

Terminating

network

TE

(MS
)

Teleservices

Bearer Services

section outside PLMN

PLMN section

Bearer Services BS:

defines data transmission

Tele Services TS:

defines services "end
-
to
-
end"

incl. application

Supplementary Services SS:

enhance/modify TS / BS

Fig. 2 (TM2100EU03TM_0001 GSM Services, 5)

Bearer Services

T/NT:

UDI:

PAD:

Transparent / Non
-
Transparent

Unrestricted Digital Information

Packet Assembler / Disassembler

Fig. 3 (TM2100EU03TM_0001 GSM Services, 7)

Teleservices

T/NT:

UDI:

PAD:

Transparent / Non
-
Transparent

Unrestricted Digital Information

Packet Assembler / Disassembler

Fig. 4 (TM2100EU03TM_0001 GSM Services, 9)

Supplementary

Services

Fig. 5 (TM2100EU03TM_0001 GSM Services, 11)

Applications

Services

Fig. 6 (TM2100EU03TM_0001 GSM Services, 13)

Mobile equipment:



Car phones



Portables



Handhelds

Applications/Transmission:



Speech



Short messages (SMS)



Faxes



Data



Internet surfing



Organizer



Mobile banking

Mobile accessories
:



Fax devices



Laptops



Digital cameras



Headsets



Barcode readers



GPS receivers



....

Transmission power:



8 W / 4 W (GSM 900/1800)



2 W / 1 W

Current Applications:

Terminal Devices

Fig. 7 (TM2100EU03TM_0001 GSM Services, 15)

SMS:

paging,

personal

short message,

remote control,

barcode reader,

telematics,

GPS,...

other

data

transport:


internet,

e
-
mail,

file transfer,

video tele
-

phony,

...

fax

speech:

"normal connection"

emergency call

Implementation

obligatory after

start phase

Trend in GSM:

speech


data

Year

Significance

1992

1994

Implementation

obligatory

Implementation

obligatory

1996

1998

Implementation

depending on operator

Traffic volume of

data services

(total):

1
-

2 %

2000

Fig. 8 (TM2100EU03TM_0001 GSM Services, 17)



Quick transfer of large


data volumes


(E
-
Mail, Internet, File transfer,


Multimedia)



Improved speech quality



User friendliness



Worldwide availability



Worldwide HPLMN service



Specific services

Solutions:

Phase 2+

Demands on
Mobile
Communications

Fig. 9 (TM2100EU03TM_0001 GSM Services, 19)

Demands on

mobile communications?

GSM

Phase 2+

GSM

Phase 2+

solutions

GSM Phase 2+
Services

Services

Fig. 10 (TM2100EU03TM_0001 GSM Services, 21)

EFR

Enhanced

Full Rate

GPRS

General Packet

Radio Service

GSM

Phase 2+

Solutions

MSP

Multiple Subscriber

Profile

ASCI

Advanced Speech

Call Items

SOR

Support of

Optimal Routing

UUS

User
-
User

Signalling

multi
-

band / mode

satellite

roaming

e.g. ICO

HSCSD

High Speed Circuit

Switched Data

EDGE

Enhanced Data rates

for the GSM Evolution

CAMEL

Customized Application

for Mobile network

Enhanced Logic

Fig. 11 (TM2100EU03TM_0001 GSM Services, 23)

0

50

100

150

200

250

300

350

400

ISDN

GSM

GSM

GSM

GSM

max. data rate [kbit/s]

Phase 1/2

Phase 2+

HSCSD

GPRS

ISDN: Integrated Services Digital Network

HSCSD: High Speed Circuit Switched Data

GPRS: General Packet Radio Service


EDGE: Enhanced Data rates for the GSM Evolution

GSM / ISDN: Data Transmission Rates

EDGE

Fig. 12 (TM2100EU03TM_0001 GSM Services, 25)

HSCSD

High Speed Circuit Switched Data

9.6





14.4 kbit/s

trans
-

mission

rate

14.4 kbit/s

28.8 kbit/s

57.6 kbit/s

••••

Circuit

Switched

for continuous

data flow

only point
-
to
-
point

e.g.

moving pictures,

video telephone

no new network

elements

smaller HW

modifications

SW modifications

Disadvantage
:

not resource efficient

Fig. 13 (TM2100EU03TM_0001 GSM Services, 27)

GPRS

General Packet Radio Service

bundling:

1
-

8 channels

Packet Switched

billing according

to data volume

possible

internet, telemetry,

fleet management,

e
-
mail, traffic telemetry,..

9.05 kbit/s

13.4 kbit/s

15.6 kbit/s

21.4 kbit/s

CS
-
1

CS
-
2

CS
-
3

CS
-
4

channel

coding

different redundancy depending on

air interface quality

point
-
to
-
multipoint

(possible)

Modifications in

Network & Protocol

architecture

protocol architecture

modifications

up to > 100 kbit/s

(theoret. 171.2 kbit/s)


Advantage:



resource efficient



direct IP access



prerequisite for UMTS

Fig. 14 (TM2100EU03TM_0001 GSM Services, 29)

EDGE: Enhanced Data rates for the GSM Evolution

transmission

rate

up to

138.4
kbit/s

up to

207.6

kbit/s

TS

bundling

up to

69.2

••••

1

2

3

4

8

data rate/TS

[kbit/s]

up to

553.6

kbit/s

Modulation

GMSK

8PSK

Carrier width

200 kHz

200 kHz

Modulation rate

270.8 kbit/s

813 kbit/s

bit rate/TS

14.4 kbit/s

69.2 kbit/s

Max. rate

115 kbit/s

553.6 kbit/s

GSM

(HSCSD)

GSM

(EDGE)

EDGE:



Booster for GPRS

(&HSCSD)




High
-
level modulation

(813 instead of 270 kbit/s)



Use of
"classical" GSM channel structure




(FDMA/TDMA: 200 kHz; 8 TS with 4.615 ms each)



max. 8 x 69.2 kbit/s =
553.6 kbit/s





meets 3G requirements

(Zone 3: rural)

Fig. 15 (TM2100EU03TM_0001 GSM Services, 31)

Speech Transmission

in Phase 2+



Voice Broadcast Service
VBS



Voice Group Call Service
VGCS



enhanced Multi
-
Level Precedence



and Pre
-
Emption
eMLPP



For Closed User Groups (
GSM
-
R
)



Group and broadcast services



Quick call set
-
up



Priority control

Enhanced Full Rate EFR

improved speech codec

(13 kbit/s)

ASCI

Advanced Speech Call Items

Fig. 16 (TM2100EU03TM_0001 GSM Services, 33)

Voice Broadcast Service VBS



1 "speaker“ (MS or fixed network), many listeners



Message for particular groups / particular cells



Only “speaker" interacts with network



Notification (instead of paging) & message in def. cells



"Listener" passive (confirmation message possible)

Voice Group Call Service VGCS



Speech group call: 1 group call channel



1 "speaker", many listeners; group as with VBS



Changing speaker (call initiator


listener mode)



"Transmission rights" in speech pauses



Ended by initiator / VAD

enhanced Multi
-
Level

Precedence & Pre
-
Emption

eMLPP



Priority control for VBS, VGCS



Priority classes:



5 (subscriber) + 2 (network
-
internal


procedures)



Priority allocation: service provider / SIM

Advanced Speech Call Items

ASCI

Fig. 17 (TM2100EU03TM_0001 GSM Services, 35)

CAMEL

Customized Application

for Mobile network Enhanced Logic

ETSI definition

of
IN services

allows

operator
-
specific

services

exchange of

subscriber information


HPLMN


VPLMN

Implementation in steps:

Step 1: Release ‘96

Support of some service definitions

e.g. "Call Screening Services", "Call Supervision Services",

"Number Translation Services"

Step 3: Release ‘99



Co
-
operation with GSM mobility


management



Multiparty calls



Support of UMTS
-

VHE concept

implementation of

IN functional elements

usage also with


International

Roaming

Step 2: Release ‘97

other features
: download HPLMN
-
charging
information, on
-
line charging, internal pre
-
paid,
Specialized Resource Functions SRF (add.
service info, tones, announcements,..), local info,
...

Fig. 18 (TM2100EU03TM_0001 GSM Services, 37)

SIM Toolkit

SIM

Subscriber Identity Module

ME

Mobile Equipment

GSM

functions



Supplements ME functions without HW modifications



Data download (SMS)



Call control (digit sequence)



Info on cell identity, call status




application modifications for status change possible



Applications: home banking, booking flights,


info services,...



Special security mechanisms

SIM Toolkit

Fig. 19 (TM2100EU03TM_0001 GSM Services, 39)

MExE

Mobile station application

Execution Environment

simplified implementation

of operator
-
dependent

applications

SW download

user friendly interfaces

(internet surfing /

mobile phones)

JAVA

WAP

Wireless

Application Protocol

Fig. 20 (TM2100EU03TM_0001 GSM Services, 41)

work

private



Max. 4 different


subscriber identities



1 SIM



Direct connection



No detour via HPLMN



VPLMN


HPLMN:
only signaling

MSP

Multiple

Subscriber Profile

UUS

User to User

Signaling

SOR

Support of

Optimal Routing

Other Phase 2+ Features

speech

SMS

+

Fig. 21 (TM2100EU03TM_0001 GSM Services, 43)