Aufgaben:Exercise 3.2: GSM Services: Difference between revisions

Revision as of 22:22, 29 December 2022

Any Public Land Mobile Network (PLMN) must provide the fixed network infrastructure and so-called Interworking Functions (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.

The basis for data transmission is the carrier services, where the maximum data rate is $\text{9.6 kbits/s}$ .

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

the telephone service,
the fax service,
the short message service (SMS).

Various ancillary services belong to each phase of GSM development:

call display, call forwarding and caller ID in phase 1,
call waiting (Call Waiting), hold (Hold) and conference call (CONF) in phase 2,
General Packet Radio Service (GPRS), High Speed Circuit-Switched Data (HSCSD), Enhanced Data Rates for GSM Evolution (EDGE) in Phase 2+.

Hint:

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

Questions

Solution

(1) Correct is the proposed solution 1:

Carrier 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 proposed solutions 1 and 3:

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

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

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

(5) Correct is the proposed solution 2:

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

@@ Line 1: / Line 1: @@
-{{quiz-Header|Buchseite=Beispiele von Nachrichtensystemen/Allgemeine Beschreibung von GSM
+{{quiz-Header|Buchseite=Examples_of_Communication_Systems/General_Description_of_GSM
 }}
-[[File:P_ID1188__Bei_A_3_2.png|right|frame|Auflistung der GSM-Dienste]]
+[[File:P_ID1188__Bei_A_3_2.png|right|frame|List of GSM services]]
-Ein jedes&nbsp; ''Public Land Mobile Network''&nbsp; (PLMN) muss die Festnetz–Infrastruktur und so genannte&nbsp;  ''Interworking Functions''&nbsp; (IWF) zur Verfügung stellen. Nur so können die gewünschten Dienste an der Benutzerschnittstelle bereitgestellt werden.
+Any&nbsp; ''Public Land Mobile Network''&nbsp; (PLMN) must provide the fixed network infrastructure and so-called&nbsp; ''Interworking Functions''&nbsp; (IWF). This is the only way to provide the desired services at the user interface.
-Die GSM–Dienste sind in drei Kategorien unterteilt:
+GSM services are divided into three categories:
-*''Bearer Services''&nbsp; (Trägerdienste),
+*''Bearer Services'',
-*''Tele Services''&nbsp; (Teledienste),
+*''Tele Services'',
-*''Supplementary Services''&nbsp; (Zusatzdienste).
+*''Supplementary Services''.
-Grundlage für die Datenübertragung bilden die Trägerdienste, wobei die maximale Datenrate&nbsp; $\text{9.6 kbits/s}$&nbsp; beträgt.
+The basis for data transmission is the carrier services, where the maximum data rate is $\text{9.6 kbits/s}$&nbsp;.
-Teledienste sind Ende–zu–Ende–Dienste. Die wichtigsten davon sind:
+Teleservices are end-to-end services. The most important of these are:
-*der Telefondienst,
+*the telephone service,
-*der Faxdienst,
+*the fax service,
-*der Kurznachrichtendienst&nbsp; (SMS).
+*the short message service&nbsp; (SMS).
-Zu jeder Phase der GSM–Entwicklung gehören verschiedene Zusatzdienste:
+Various ancillary services belong to each phase of GSM development:
-*Anrufanzeige, Rufumleitung und Rufnummernanzeige in der Phase 1,
+*call display, call forwarding and caller ID in phase 1,
-*Anklopfen&nbsp; (''Call Waiting''), Halten&nbsp; (''Hold'')&nbsp; und Konferenzschaltung&nbsp; (''CONF'')&nbsp; in der Phase 2,
+*call waiting&nbsp; (''Call Waiting''), hold&nbsp; (''Hold'')&nbsp; and conference call&nbsp; (''CONF'')&nbsp; in phase 2,
-*General Packet Radio Service&nbsp; (GPRS), High Speed Circuit–Switched Data&nbsp; (HSCSD), Enhanced Data Rates for GSM Evolution&nbsp; (EDGE) in der Phase 2+.
+*General Packet Radio Service&nbsp; (GPRS), High Speed Circuit-Switched Data&nbsp; (HSCSD), Enhanced Data Rates for GSM Evolution&nbsp; (EDGE) in Phase 2+.
@@ Line 33: / Line 33: @@
-''Hinweis:''
+Hint:
-*Die Aufgabe gehört zum Kapitel&nbsp; [[Examples_of_Communication_Systems/Allgemeine_Beschreibung_von_GSM|Allgemeine Beschreibung von GSM]].
+*The exercise belongs to the chapter&nbsp; [[Examples_of_Communication_Systems/General_Description_of_GSM|"General Description of GSM"]].
@@ Line 41: / Line 41: @@
-===Fragebogen===
+===Questions===
 <quiz display=simple>
-{Welche der GSM–Dienste bilden die Grundlage für die Datenübertragung?
+{Which of the GSM services are the basis for data transmission?
 |type="[]"}
-+ Trägerdienste,
++ bearer services,
-- Teledienste,
+- teleservices,
-- Zusatzdienste.
+- supplementary services.
-{Wie hoch ist die maximale Datenrate für die GSM–Datenübertragung?
+{What is the maximum data rate for GSM data transmission?
 |type="[]"}
 - $2.4 \ \rm kbit/s$.
@@ Line 57: / Line 57: @@
 + $9.6 \ \rm kbit/s$.
-{Welche Aussagen sind für die Teledienste zutreffend?
+{Which statements are true for teleservices?
 |type="[]"}
-+ Die Teledienste sind Ende–zu–Ende–Dienste.
++ Teleservices are end-to-end services.
-- Man unterscheidet synchrone und asynchrone Teledienste.
+- A distinction is made between synchronous and asynchronous teleservices.
-+ Beispiele sind der Telefon–, der Fax– und der SMS–Dienst.
++ Examples are the telephone, fax and SMS services.
-{Welche Zusatzdienste entstammen der GSM–Phase 2?
+{Which additional services originate from GSM phase 2?
 |type="[]"}
-- Rufumleitung&nbsp; (''Call Forwarding''),
+- Call forwarding,
-+ Anklopfen&nbsp; (''Call Waiting''),
++ Call Waiting,
 - General Packet Radio Service&nbsp; (GPRS),
-+ Konferenzschaltung&nbsp; (CONF).
++ Conference Call&nbsp; (CONF).
-{Welche Technik wird bei&nbsp; ''High Speed Circuit–Switched Data''&nbsp;  (HSCSD) verwendet?
+{What technology is used in&nbsp; ''High Speed Circuit-Switched Data'''&nbsp; (HSCSD)?
 |type="[]"}
-- Paketvermittlung,
+- Packet switching,
-+ Leitungsvermittlung,
++ circuit switching.
-- Durchschaltevermittlung.
 </quiz>
-===Musterlösung===
+===Solution===
 {{ML-Kopf}}
-'''(1)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 1</u>:
+'''(1)'''&nbsp; Correct is the <u>proposed solution 1</u>:
-*Die Grundlagen für die Datenübertragung bilden die Trägerdienste.
+*Carrier services form the basis for data transmission.
-*Sie stellen die technischen Möglichkeiten bereit, um Daten gesichert zu transportieren.
+*They provide the technical means to transport data in a secured manner.
-'''(2)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 3</u>:
+'''(2)'''&nbsp; Correct is the <u>proposed solution 3</u>:
-*Die maximale Datenrate für GSM–Datenübertragung ist $9.6 \ \rm kbit/s$.
+*The maximum data rate for GSM data transmission is $9.6 \rm kbit/s$.
-*Es gibt dabei synchrone und asynchrone sowie leitungs– und paketvermittelte Datenübertragung.
+*There are synchronous and asynchronous as well as circuit-switched and packet-switched data transmission.
-'''(3)'''&nbsp; Richtig sind die <u>Lösungsvorschläge 1 und 3</u>:
+'''(3)'''&nbsp; Correct are <u>proposed solutions 1 and 3</u>:
-*Die Aussage 2 ist falsch: Die Begriffe „synchron” und „asynchron” spielen nur in Zusammenhang mit den Trägerdiensten eine Rolle.
+*Proposition 2 is incorrect: The terms ''synchronous'' and ''asynchronous'' play a role only in connection with carrier services.
-'''(4)'''&nbsp; Richtig sind die <u>Lösungsvorschläge 2 und 4</u>:
+'''(4)'''&nbsp; Correct are the <u>proposed solutions 2 and 4</u>:
-*Dagegen gehört die Rufumleitung zur GSM–Phase 1 und ''General Packet Radio Service'' (GPRS) zur Phase 2+.
+*In contrast, call forwarding belongs to GSM phase 1 and ''General Packet Radio Service'' (GPRS) to phase 2+.
-'''(5)'''&nbsp; Richtig ist der <u>Lösungsvorschlag 2</u>:
+'''(5)'''&nbsp; Correct is the <u>proposed solution 2</u>:
-*''High Speed Circuit–Switched Data'' (HSCSD) wurde als leitungsvermittelte Übertragungstechnik eingeführt.
+*''High Speed Circuit-Switched Data'' (HSCSD) was introduced as a circuit-switched transmission technology.
-* Dagegen arbeitet ''General Packet Radio Service'' (GPRS) paketvermittelt und ''Enhanced Data Rate for GSM Evolution'' (EDGE) kann als durchschaltevermittelter Datendienst bezeichnet werden.
+*In contrast, ''General Packet Radio Service'' (GPRS) operates as packet-switched and ''Enhanced Data Rate for GSM Evolution'' (EDGE) can be described as circuit-switched data service.
 {{ML-Fuß}}

	Call forwarding,
	Call Waiting,
	General Packet Radio Service (GPRS),
	Conference Call (CONF).

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