Difference between revisions of "Aufgaben:Exercise 3.2: GSM Services"

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m (Text replacement - "Category:Aufgaben zu Beispiele von Nachrichtensystemen" to "Category:Examples of Communication Systems: Exercises")
 
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{{quiz-Header|Buchseite=Beispiele von Nachrichtensystemen/Allgemeine Beschreibung von GSM
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{{quiz-Header|Buchseite=Examples_of_Communication_Systems/General_Description_of_GSM
 
}}  
 
}}  
  
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[[File:P_ID1188__Bei_A_3_2.png|right|frame|Auflistung der GSM-Dienste]]
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[[File:EN_Bei_A_3_2.png|right|frame|List of GSM services ]]
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Ein jedes  ''Public Land Mobile Network''  (PLMN) muss die Festnetz–Infrastruktur und so genannte  ''Interworking Functions''  (IWF) zur Verfügung stellen. Nur so können die gewünschten Dienste an der Benutzerschnittstelle bereitgestellt werden.
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Any  "Public Land Mobile Network"  $\rm (PLMN)$  must provide the fixed network infrastructure and so-called  "interworking functions"  $\rm (IWF)$.  This is the only way to provide the desired services at the user interface.
  
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Die GSM–Dienste sind in drei Kategorien unterteilt:
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GSM services are divided into three categories:
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*''Bearer Services''  (Trägerdienste),
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*Bearer services,
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*''Tele Services''  (Teledienste),
 
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*''Supplementary Services''  (Zusatzdienste).
 
  
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*Tele services,
  
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Grundlage für die Datenübertragung bilden die Trägerdienste, wobei die maximale Datenrate  $\text{9.6 kbits/s}$  beträgt.
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*Supplementary services.
  
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Teledienste sind Ende–zu–Ende–Dienste. Die wichtigsten davon sind:
 
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*der Telefondienst,
 
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*der Faxdienst,
 
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*der Kurznachrichtendienst  (SMS).
 
  
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Basis for data transmission are the  '''bearer services''',  where the maximum data rate is  $\text{9.6 kbits/s}$.
  
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Zu jeder Phase der GSM–Entwicklung gehören verschiedene Zusatzdienste:
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'''Tele services'''  are end-to-end services.  The most important of these are:
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*Anrufanzeige, Rufumleitung und Rufnummernanzeige in der Phase 1,
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#the telephone service,
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*Anklopfen  (''Call Waiting''), Halten  (''Hold'')  und Konferenzschaltung  (''CONF'')  in der Phase 2,
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#the fax service,
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*General Packet Radio Service  (GPRS), High Speed Circuit–Switched Data  (HSCSD), Enhanced Data Rates for GSM Evolution  (EDGE) in der Phase 2+.
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#the short message service  $\rm (SMS)$.
  
  
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Various  '''supplementary services'''  belong to each phase of GSM development:
 +
#"call display",  "call forwarding"  and  "caller ID"  in phase 1,
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#"call waiting",  "hold"   and  "conference call"   in phase 2,
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#"GPRS",  "HSCSD",  "EDGE"  in phase 2+.
  
  
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<u>Hint:</u>&nbsp; The exercise belongs to the chapter&nbsp; [[Examples_of_Communication_Systems/General_Description_of_GSM|"General Description of GSM"]].
  
  
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''Hinweis:''
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===Questions===
−
 
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*Die Aufgabe gehört zum Kapitel&nbsp; [[Examples_of_Communication_Systems/Allgemeine_Beschreibung_von_GSM|Allgemeine Beschreibung von GSM]].
 
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===Fragebogen===
 
  
 
<quiz display=simple>
 
<quiz display=simple>
  
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{Welche der GSM–Dienste bilden die Grundlage für die Datenübertragung?
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{Which of the GSM services are the basis for data transmission?
 
|type="[]"}
 
|type="[]"}
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+ Trägerdienste,
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+ bearer services,
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- Teledienste,
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- teleservices,
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- Zusatzdienste.
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- supplementary services.
  
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{Wie hoch ist die maximale Datenrate für die GSM–Datenübertragung?
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{What is the maximum data rate for GSM data transmission?
 
|type="[]"}
 
|type="[]"}
 
- $2.4 \ \rm kbit/s$.
 
- $2.4 \ \rm kbit/s$.
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+ $9.6 \ \rm kbit/s$.
 
+ $9.6 \ \rm kbit/s$.
  
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{Welche Aussagen sind für die Teledienste zutreffend?
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{Which statements are true for teleservices?
 
|type="[]"}
 
|type="[]"}
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+ Die Teledienste sind Ende–zu–Ende–Dienste.
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+ Tele services are end-to-end services.
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- Man unterscheidet synchrone und asynchrone Teledienste.
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- A distinction is made between synchronous and asynchronous tele services.
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+ Beispiele sind der Telefon–, der Fax– und der SMS–Dienst.
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+ Examples are the telephone, fax and SMS services.
  
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{Welche Zusatzdienste entstammen der GSM–Phase 2?
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{Which supplementary services originate from GSM phase 2?
 
|type="[]"}
 
|type="[]"}
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- Rufumleitung&nbsp; (''Call Forwarding''),
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- "Call Forwarding",
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+ Anklopfen&nbsp; (''Call Waiting''),
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+ "Call Waiting",
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- General Packet Radio Service&nbsp; (GPRS),
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- "General Packet Radio Service"&nbsp; $\rm (GPRS)$,
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+ Konferenzschaltung&nbsp; (CONF).
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+ "Conference Call"&nbsp; $\rm (CONF)$.
  
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{Welche Technik wird bei&nbsp; ''High Speed Circuit–Switched Data''&nbsp; (HSCSD) verwendet?
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{What technology is used in&nbsp; "High Speed Circuit-Switched Data"&nbsp; $\rm (HSCSD)$?
 
|type="[]"}
 
|type="[]"}
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- Paketvermittlung,
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- Packet switching,
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+ Leitungsvermittlung,
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+ circuit switching.
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- Durchschaltevermittlung.
 
  
 
</quiz>
 
</quiz>
  
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===Musterlösung===
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===Solution===
 
{{ML-Kopf}}
 
{{ML-Kopf}}
  
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'''(1)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 1</u>:
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'''(1)'''&nbsp; Correct is the&nbsp; <u>proposed solution 1</u>:
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*Die Grundlagen für die Datenübertragung bilden die Trägerdienste.  
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*Bearer services form the basis for data transmission.
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*Sie stellen die technischen Möglichkeiten bereit, um Daten gesichert zu transportieren.
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 +
*They provide the technical means to transport data in a secured manner.
  
  
  
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'''(2)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 3</u>:
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'''(2)'''&nbsp; Correct is the&nbsp; <u>proposed solution 3</u>:
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*Die maximale Datenrate für GSM–Datenübertragung ist $9.6 \ \rm kbit/s$.  
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*The maximum data rate for GSM data transmission is&nbsp; $9.6 \rm kbit/s$.
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*Es gibt dabei synchrone und asynchrone sowie leitungs– und paketvermittelte Datenübertragung.
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 +
*There are synchronous and asynchronous as well as circuit-switched and packet-switched data transmission.
 +
 
 +
 
  
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'''(3)'''&nbsp; Correct are the&nbsp; <u>proposed solutions 1 and 3</u>:
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*Proposition 2 is incorrect:
  
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*The terms&nbsp; "synchronous"&nbsp; and&nbsp; "asynchronous"&nbsp; play a role only in connection with bearer services.
  
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'''(3)'''&nbsp; Richtig sind die <u>Lösungsvorschläge 1 und 3</u>:
 
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*Die Aussage 2 ist falsch: Die Begriffe „synchron” und „asynchron” spielen nur in Zusammenhang mit den Trägerdiensten eine Rolle.
 
  
  
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'''(4)'''&nbsp; Correct are the&nbsp; <u>proposed solutions 2 and 4</u>:
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*In contrast,&nbsp; "call forwarding"&nbsp; belongs to GSM phase 1 and&nbsp; "General Packet Radio Service"&nbsp; $\rm (GPRS)$&nbsp; to phase 2+.
  
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'''(4)'''&nbsp; Richtig sind die <u>Lösungsvorschläge 2 und 4</u>:
 
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*Dagegen gehört die Rufumleitung zur GSM–Phase 1 und ''General Packet Radio Service'' (GPRS) zur Phase 2+.
 
  
  
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'''(5)'''&nbsp; Correct is the&nbsp; <u>proposed solution 2</u>:
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*"High Speed Circuit-Switched Data"&nbsp; $\rm (HSCSD)$&nbsp; was introduced as a circuit-switched transmission technology.
  
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'''(5)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 2</u>:
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*In contrast,&nbsp; "General Packet Radio Service"&nbsp; $\rm (GPRS)$&nbsp; operates as packet-switched and&nbsp; "Enhanced Data Rate for GSM Evolution"&nbsp; $\rm (EDGE)$&nbsp; can be described as circuit-switched data service.
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*''High Speed Circuit–Switched Data'' (HSCSD) wurde als leitungsvermittelte Übertragungstechnik eingeführt.
 
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* Dagegen arbeitet ''General Packet Radio Service'' (GPRS) paketvermittelt und ''Enhanced Data Rate for GSM Evolution'' (EDGE) kann als durchschaltevermittelter Datendienst bezeichnet werden.
 
  
 
{{ML-Fuß}}
 
{{ML-Fuß}}
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[[Category:Examples of Communication Systems: Exercises|^3.1 Allgemeine Beschreibung von GSM
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[[Category:Examples of Communication Systems: Exercises|^3.1 General Description of GSM
 
^]]
 
^]]

Latest revision as of 18:58, 7 January 2023

List of GSM services

Any  "Public Land Mobile Network"  $\rm (PLMN)$  must provide the fixed network infrastructure and so-called  "interworking functions"  $\rm (IWF)$.  This is the only way to provide the desired services at the user interface.

GSM services are divided into three categories:

  • Bearer services,
  • Tele services,
  • Supplementary services.


Basis for data transmission are the  bearer services,  where the maximum data rate is  $\text{9.6 kbits/s}$.

Tele services  are end-to-end services.  The most important of these are:

  1. the telephone service,
  2. the fax service,
  3. the short message service  $\rm (SMS)$.


Various  supplementary services  belong to each phase of GSM development:

  1. "call display",  "call forwarding"  and  "caller ID"  in phase 1,
  2. "call waiting",  "hold"  and  "conference call"  in phase 2,
  3. "GPRS",  "HSCSD",  "EDGE"  in phase 2+.


Hint:  The exercise belongs to the chapter  "General Description of GSM".



Questions

1

Which of the GSM services are the basis for data transmission?

bearer services,
teleservices,
supplementary services.

2

What is the maximum data rate for GSM data transmission?

$2.4 \ \rm kbit/s$.
$7.8 \ \rm kbit/s$.
$9.6 \ \rm kbit/s$.

3

Which statements are true for teleservices?

Tele services are end-to-end services.
A distinction is made between synchronous and asynchronous tele services.
Examples are the telephone, fax and SMS services.

4

Which supplementary services originate from GSM phase 2?

"Call Forwarding",
"Call Waiting",
"General Packet Radio Service"  $\rm (GPRS)$,
"Conference Call"  $\rm (CONF)$.

5

What technology is used in  "High Speed Circuit-Switched Data"  $\rm (HSCSD)$?

Packet switching,
circuit switching.


Solution

Solution

(1)  Correct is the  proposed solution 1:

  • Bearer services form the basis for data transmission.
  • They provide the technical means to transport data in a secured manner.


(2)  Correct is the  proposed solution 3:

  • The maximum data rate for GSM data transmission is  $9.6 \rm kbit/s$.
  • There are synchronous and asynchronous as well as circuit-switched and packet-switched data transmission.


(3)  Correct are the  proposed solutions 1 and 3:

  • Proposition 2 is incorrect:
  • The terms  "synchronous"  and  "asynchronous"  play a role only in connection with bearer services.


(4)  Correct are the  proposed solutions 2 and 4:

  • In contrast,  "call forwarding"  belongs to GSM phase 1 and  "General Packet Radio Service"  $\rm (GPRS)$  to phase 2+.


(5)  Correct is the  proposed solution 2:

  • "High Speed Circuit-Switched Data"  $\rm (HSCSD)$  was introduced as a circuit-switched transmission technology.
  • In contrast,  "General Packet Radio Service"  $\rm (GPRS)$  operates as packet-switched and  "Enhanced Data Rate for GSM Evolution"  $\rm (EDGE)$  can be described as circuit-switched data service.

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