Aufgaben:Exercise 3.5Z: GSM Network Components - Revision history

Maintenance script: Add German interlanguage link

2026-03-16T12:27:11Z

Add German interlanguage link

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	[[Category:Mobile Communications: Exercises\|^3.3 Characteristics of GSM^]]		[[Category:Mobile Communications: Exercises\|^3.3 Characteristics of GSM^]]
			[[de:Exercises:Exercise_3.5Z:_GSM_Network_Components]]

Javier: Text replacement - "Category:Exercises for Mobile Communications" to "Category:Mobile Communications: Exercises"

2021-03-23T12:37:43Z

Text replacement - "Category:Exercises for Mobile Communications" to "Category:Mobile Communications: Exercises"

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	[[Category:~~Exercises for~~ Mobile Communications\|^3.3 Characteristics of GSM^]]		[[Category:Mobile Communications: Exercises\|^3.3 Characteristics of GSM^]]

Guenter at 13:23, 23 January 2021

2021-01-23T13:23:51Z

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	'''(1)'''  Each mobile station (MS) is in communication with a base transceiver station (BTS). This is part of the ~~''Base Station Subsystem''~~ (BSS)   ⇒   <u>solution 1</u>.		'''(1)'''  Each mobile station  (MS)  is in communication with a base transceiver station  (BTS).  This is part of the base station subsystem  (BSS)   ⇒   <u>solution 1</u>.



			'''(2)'''  Correct are the <u>statements 1 and 3</u>.
			*In contrast, the base transceiver station is not responsible for switching tasks,
			*but this is rather the task of a mobile switching center  (MSC), which is part of the switching and management subsystem  (SMSS).


	'''(2)'''  Correct are the <u>statements 1 and 3</u>. In contrast, the base transceiver station is not responsible for switching tasks, but this is rather the task of a mobile switching center (MSC), which is part of the switching and management subsystem (SMSS).

	'''(3)''' If, as is usually the case with GSM, the individual antennas cover $120^\circ$ sectors, a BTS can provide up to three connection paths   ⇒   $N_{\rm max} \hspace{0.15cm}\underline{= 3}$.		'''(3)''' If, as is usually the case with GSM, the individual antennas cover $120^\circ$ sectors, a BTS can provide up to three connection paths   ⇒   $N_{\rm max} \hspace{0.15cm}\underline{= 3}$.


			'''(4)'''  Only the operation and management center (OMC) belongs to the OMSS   ⇒   <u> Proposal 3</u> .
			*In contrast, MSC and GMSC are components of the mobile switching network  (SMSS).
			*With regard to OMC, a distinction is made between OMC-B (for BSS monitoring) and OMC-S (for SMSS monitoring).

	~~'''(4)'''  Only the Operation and Management Center (OMC) belongs to the OMSS   ⇒   <u> Proposal 3</u> .~~
	*In contrast, MSC and GMSC are components of the mobile switching network (SMSS).
	*With regard to OMC, a distinction is made between OMC-B (for BSS monitoring) and OMC-S (for SMSS monitoring).

	'''(5)'''  <u>~~solutions~~ 1, 3 und 4</u> are correct:		'''(5)'''  <u>Solutions 1, 3 und 4</u> are correct:
	*The ~~''Gateway Mobile Switching Center''~~ (GMSC) is a hardware unit that is responsible for switching between the fixed network and the mobile network.		*The gateway mobile switching center  (GMSC) is a hardware unit that is responsible for switching between the fixed network and the mobile network.
	*The other three terms given ~~actually~~ describe databases of the ~~''Switching~~ & ~~Management Subsystem''~~ (SMSS).		*The other three terms given describe databases of the switching & management subsystem  (SMSS).
	* The ~~''Authentication Center''~~ (AUC) is responsible for the storage of confidential data and keys.		* The authentication center  (AUC)  is responsible for the storage of confidential data and keys.
	* The ~~''Home Location Register''~~ (HLR) is a central register for the entire Public Land Mobile Network (PLMN) for managing unencrypted subscriber data, subscribed services and routing for calls from a mobile operator's own subscribers.		* The home location register  (HLR) is a central register for the entire Public Land Mobile Network (PLMN) for managing unencrypted subscriber data, subscribed services and routing for calls from a mobile operator's own subscribers.
	*Contrary, the '~~'Visitors' Location Register''~~ (VLR) contains information about the current visitors of other operators who are located in the current PLMN.		*Contrary, the  visitors' location register  (VLR) contains information about the current visitors of other operators who are located in the current PLMN.

Guenter at 13:11, 23 January 2021

2021-01-23T13:11:58Z

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	}}		}}

	[[File:EN_Mob_A_3_5Z.png\|right\|frame\|~~&bdquo;~~Base Station Subsystem~~”~~ of GSM]]		[[File:EN_Mob_A_3_5Z.png\|right\|frame\|Base Station Subsystem of GSM]]
	For the mobile phone standard  ''Global System for Mobile Communications''  - abbreviated  ~~'''~~GSM~~'''~~ - the network infrastructure includes the following subsystems:		For the mobile phone standard  "Global System for Mobile Communications"  - abbreviated  $\rm GSM$ - the network infrastructure includes the following subsystems:
	*''Base Station Subsystem''   (~~'''~~BSS~~'''~~),		*"Base Station Subsystem"   $\rm (BSS)$,
	*''Switching & Management Subsystem''   (~~'''~~SMSS~~'''~~),		*"Switching & Management Subsystem"   $\rm (SMSS)$,
	*''Operation & Maintenance Subsystem''   (~~'''~~OMSS~~'''~~).		*"Operation & Maintenance Subsystem"   $\rm (OMSS)$.

	The  ''Base Station Subsystem''  is mainly responsible for the GSM radio network (see diagram), while the  ''Switching & Management Subsystem''  represents the switching network and the  ''Operation & Maintenance Subsystem''  is responsible for operation and maintenance.

	The ~~following terms will continue to be used in the questions on these tasks:~~		The  "Base Station Subsystem"  is mainly responsible for the GSM radio network (see diagram), while the  "Switching & Management Subsystem"  represents the switching network and the  "Operation & Maintenance Subsystem"  is responsible for operation and maintenance.
	*''Authentication Center''   ~~('''AUC''')~~
	*''Base Station ~~Controller''~~   (~~'''BSC'''~~),
	*''Base Transceiver Station''   ~~('''BTS'''),~~
	*''Gateway Mobile Switching ~~Center''~~ &~~nbsp; ('''GMSC'''),~~
	*''Home Location Register''   ~~('''HLR'''),~~
	*''Mobile Switching Center''   ~~('''MSC'''),~~
	*''Operation ~~and~~ Maintenance ~~Center''~~   ~~('''OMC'''),~~
	*''Visitor Location Register''   ('''VLR''').

			The following terms will continue to be used in the questions on these exercise:
			*"Authentication Center"   $\rm (AUC)$,
			*"Base Station Controller"   $\rm (BSC)$,
			*"Base Transceiver Station"   $\rm (BTS)$,
			*"Gateway Mobile Switching Center"   $\rm (GMSC)$,
			*"Home Location Register"   $\rm (HLR)$,
			*"Mobile Switching Center"   $\rm (MSC)$,
			*"Operation and Maintenance Center"   $\rm (OMC)$,
			*"Visitor Location Register"   $\rm (VLR)$.


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	~~''Notes:''~~

	*This ~~task~~ belongs to the chapter  [[Mobile_Communications/~~Die_Charakteristika_von_GSM~~\|~~Charakteristika von~~ GSM]].		''Notes:''     This exercise belongs to the chapter  [[Mobile_Communications/Characteristics_of_GSM\|Characteristics of GSM]].


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	\|type="[]"}		\|type="[]"}
	+ With the BSS,		+ With the BSS,
	- the SMSS,		- with the SMSS,
	- the OMSS.		- with the OMSS.

	{Which statements apply to a ~~''Base Transceiver Station''~~ (BTS)?		{Which statements apply to a base transceiver station  (BTS)?
	\|type="[]"}		\|type="[]"}
	+ It includes the base station's transmitting and receiving devices.		+ It includes the base station's transmitting and receiving devices.
	- The task of the BTS is to switch calls.		- The task of the BTS is to switch calls.
	+ In most cases, several BTS are subordinate to a common BSC.		+ In most cases, several BTS are subordinate to a common base station controller  (BSC).

	{How many links can a BTS with multiple antennas support if each antenna covers a sector of  $120^\circ$ ?		{How many links can a BTS with multiple antennas support if each antenna covers a sector of  $120^\circ$ ?
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	{Which of the following components are part of the OMSS?		{Which of the following components are part of the OMSS?
	\|type="[]"}		\|type="[]"}
	- The GMSC		- The GMSC.
	- The MSC		- The MSC.
	+ The OMC		+ The OMC.

	{Which of the following components are databases?		{Which of the following components are databases?
	\|type="[]"}		\|type="[]"}
	+ The AUC		+ The AUC.
	- The GMSC		- The GMSC.
	+ The HLR		+ The HLR.
	+ The VLR		+ The VLR.

	</quiz>		</quiz>

Javier: Text replacement - "===Sample Solution===" to "===Solution==="

2020-12-15T14:10:45Z

Text replacement - "===Sample Solution===" to "===Solution==="

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	</quiz>		</quiz>

	===~~Sample~~ Solution===		===Solution===
	{{ML-Kopf}}		{{ML-Kopf}}

Javier: Text replacement - "Mobile Kommunikation/Die Charakteristika von GSM" to "Mobile_Communications/Characteristics_of_GSM"

2020-12-15T14:03:24Z

Text replacement - "Mobile Kommunikation/Die Charakteristika von GSM" to "Mobile_Communications/Characteristics_of_GSM"

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	{{quiz-Header\|Buchseite=~~Mobile Kommunikation~~/~~Die Charakteristika von GSM~~		{{quiz-Header\|Buchseite=Mobile_Communications/Characteristics_of_GSM
	}}		}}

Javier: Text replacement - "Mobile_Kommunikation/" to "Mobile_Communications/"

2020-07-09T09:13:38Z

Text replacement - "Mobile_Kommunikation/" to "Mobile_Communications/"

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	''Notes:''		''Notes:''

	*This task belongs to the chapter  [[~~Mobile_Kommunikation~~/Die_Charakteristika_von_GSM\|Charakteristika von GSM]].		*This task belongs to the chapter  [[Mobile_Communications/Die_Charakteristika_von_GSM\|Charakteristika von GSM]].

Oezdemir at 15:04, 2 July 2020

2020-07-02T15:04:42Z

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	*The other three terms given actually describe databases of the ''Switching & Management Subsystem'' (SMSS).		*The other three terms given actually describe databases of the ''Switching & Management Subsystem'' (SMSS).
	* The ''Authentication Center'' (AUC) is responsible for the storage of confidential data and keys.		* The ''Authentication Center'' (AUC) is responsible for the storage of confidential data and keys.
	* The Home Location Register (HLR) is a central register for the entire Public Land Mobile Network (PLMN) for managing unencrypted subscriber data, subscribed services and routing for calls from a mobile operator's own subscribers.		* The ''Home Location Register'' (HLR) is a central register for the entire Public Land Mobile Network (PLMN) for managing unencrypted subscriber data, subscribed services and routing for calls from a mobile operator's own subscribers.
	*Contrary, the Visitors' Location Register (VLR) contains information about the current visitors of other operators who are located in the current PLMN.		*Contrary, the ''Visitors' Location Register'' (VLR) contains information about the current visitors of other operators who are located in the current PLMN.

Oezdemir: /* Sample Solution */

2020-07-02T15:03:26Z

Sample Solution

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	'''(1)'''  ~~Jede Mobilstation~~ (MS) ~~steht mit einer ''Base Transceiver Station''~~ (BTS) ~~in Funkverbindung~~. ~~Diese ist Teil des~~ ''Base Station ~~Subsystems~~'' (BSS)   ⇒   <u>~~Lösungsvorschlag~~ 1</u>.		'''(1)'''  Each mobile station (MS) is in communication with a base transceiver station (BTS). This is part of the ''Base Station Subsystem'' (BSS)   ⇒   <u>solution 1</u>.


	'''(2)'''  ~~Richtig sind die~~ <u>~~Aussagen~~ 1 ~~und~~ 3</u>. ~~Dagegen ist die ''Base Transceiver Station'' nicht für Vermittlungsaufgaben zuständig~~, ~~sondern dies ist die Aufgabe eines ''Mobile Switching Centers''~~ (MSC), ~~das einen Teil des ''Switching~~ and ~~Management Subsystems''~~ (SMSS) ~~darstellt~~.		'''(2)'''  Correct are the <u>statements 1 and 3</u>. In contrast, the base transceiver station is not responsible for switching tasks, but this is rather the task of a mobile switching center (MSC), which is part of the switching and management subsystem (SMSS).

			'''(3)''' If, as is usually the case with GSM, the individual antennas cover $120^\circ$ sectors, a BTS can provide up to three connection paths   ⇒   $N_{\rm max} \hspace{0.15cm}\underline{= 3}$.


	'''(3)'''  Wenn wie meist bei GSM die einzelnen Antennen $120^\circ$–Sektoren abdecken, so kann eine BTS bis zu drei Verbindungswege bereitstellen   ⇒   $N_{\rm max} \hspace{0.15cm}\underline{= 3}$.

			'''(4)'''  Only the Operation and Management Center (OMC) belongs to the OMSS   ⇒   <u> Proposal 3</u> .
			*In contrast, MSC and GMSC are components of the mobile switching network (SMSS).
			*With regard to OMC, a distinction is made between OMC-B (for BSS monitoring) and OMC-S (for SMSS monitoring).

	~~'''(4)'''  Nur das Operation and Management Center (OMC) gehört zum OMSS   ⇒   <u> Vorschlag 3</u> .~~		'''(5)'''  <u>solutions 1, 3 und 4</u> are correct:
	*Dagegen sind MSC und GMSC Komponenten des Mobilvermittlungsnetzes (SMSS).		*The ''Gateway Mobile Switching Center'' (GMSC) is a hardware unit that is responsible for switching between the fixed network and the mobile network.
	*Bezüglich des OMC unterscheidet man schließlich noch zwischen OMC–B (zur BSS–Überwachung) und OMC–S (zur SMSS–Überwachung).		*The other three terms given actually describe databases of the ''Switching & Management Subsystem'' (SMSS).
			* The ''Authentication Center'' (AUC) is responsible for the storage of confidential data and keys.
			* The Home Location Register (HLR) is a central register for the entire Public Land Mobile Network (PLMN) for managing unencrypted subscriber data, subscribed services and routing for calls from a mobile operator's own subscribers.
	'''(5)'''  <u>~~Lösungsvorschläge~~ 1, 3 und 4</u>:		*Contrary, the Visitors' Location Register (VLR) contains information about the current visitors of other operators who are located in the current PLMN.
	*~~Das~~ ''Gateway Mobile Switching Center'' (GMSC) ~~ist eine Hardware-Einheit, die für die Vermittlung zwischen dem Festnetz und dem Mobilnetz zuständig ist~~.
	*~~Die drei anderen angegebenen Begriffe beschreiben tatsächlich Datenbanken des~~ ''Switching & Management Subsystem'' (SMSS).
	* ~~Das~~ ''Authentication Center'' (AUC) ~~ist für die Speicherung von vertraulichen Daten und Schlüsseln verantwortlich~~.
	* ~~Das ''~~Home Location Register'' (HLR) ~~ist ein Zentralregister für das gesamte ''~~Public Land Mobile Network'' (PLMN) ~~zur Verwaltung unverschlüsselter Telnehmerdaten~~, ~~der abonnierten Dienste und zur Wegesuche für Rufe der eigenen Teilnehmer eines Mobilfunkbetreibers~~.
	*~~Dagegen sind im Besucherregister~~ (VLR) ~~die Informationen über die momentanen Besucher anderer Betreiber abgelegt, die sich im aktuellen~~ PLMN ~~befinden~~.

Oezdemir at 08:17, 30 June 2020

2020-06-30T08:17:30Z

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	[[File:EN_Mob_A_3_5Z.png\|right\|frame\|&bdquo;Base Station Subsystem” ~~von~~ GSM]]		[[File:EN_Mob_A_3_5Z.png\|right\|frame\|&bdquo;Base Station Subsystem” of GSM]]
	For the mobile phone standard  ''Global System for Mobile Communications''  - abbreviated  '''GSM''' - the network infrastructure includes the following subsystems:		For the mobile phone standard  ''Global System for Mobile Communications''  - abbreviated  '''GSM''' - the network infrastructure includes the following subsystems:
	*''Base Station Subsystem''   ('''BSS'''),		*''Base Station Subsystem''   ('''BSS'''),