Aufgaben:Exercise 4.5: LTE vs LTE-Advanced - Revision history

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

2021-03-23T12:37:32Z

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

Guenter at 16:37, 6 February 2021

2021-02-06T16:37:47Z

Guenter at 16:28, 6 February 2021

2021-02-06T16:28:11Z

Guenter at 16:18, 6 February 2021

2021-02-06T16:18:38Z

Guenter at 16:15, 6 February 2021

2021-02-06T16:15:28Z

Guenter at 16:14, 6 February 2021

2021-02-06T16:14:22Z

Javier: Text replacement - "Mobile Kommunikation/LTE–Advanced – eine Weiterentwicklung von LTE" to "Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE"

2020-12-15T14:07:48Z

Text replacement - "Mobile Kommunikation/LTE–Advanced – eine Weiterentwicklung von LTE" to "Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE"

Oezdemir at 18:04, 22 July 2020

2020-07-22T18:04:49Z

Oezdemir at 18:04, 22 July 2020

2020-07-22T18:04:34Z

Oezdemir: /* Fragebogen */

2020-07-22T18:04:16Z

Fragebogen

← Older revision		Revision as of 12:37, 23 March 2021
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−	[[Category:~~Exercises for~~ Mobile Communications\|^4.5 Further Developments of LTE^]]	+	[[Category:Mobile Communications: Exercises\|^4.5 Further Developments of LTE^]]


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−	[[Category:~~Exercises for~~ Mobile Communications\|^4.5 Further Developments of LTE^]]	+	[[Category:Mobile Communications: Exercises\|^4.5 Further Developments of LTE^]]

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 {{ML-Kopf}}
-'''(1)'''&nbsp; Correct are the <u>answers 3 and 4</u>. LTE-B and LTE2 are pure fantasy names.
+'''(1)'''&nbsp; Correct are the <u>answers 3 and 4</u>.&nbsp; LTE-B and LTE2 are pure fantasy names.
-*''Ultra Mobile Broadband'' (UMB) is a competitor to LTE, but is considered to be third generation.
+*"Ultra Mobile Broadband"&nbsp; (UMB) is a competitor to LTE, but is considered to be third generation.
-*It was specified by [http://www.3gpp2.com/ 3GPP2] (''Third Generation Partnership Project 2''), while LTE goes back to [http://www.3gpp.org/ 3GPP] (''Third Generation Partnership Project'').
+*It was specified by&nbsp; [http://www.3gpp2.com/ 3GPP2] ("Third Generation Partnership Project 2"), while LTE goes back to [http://www.3gpp.org/ 3GPP] ("Third Generation Partnership Project").
-*The 3GPP2 was founded almost at the same time as the almost named 3GPP in December 1998, apparently due to unbridgeable ideological differences.
+*The "3GPP2" was founded almost at the same time as the almost named "3GPP" in December 1998, apparently due to unbridgeable ideological differences.
-*The success of UMB, however, seems to be more than questionable - at least in Europe - because even its predecessor '''cdma2000''', for which the term '''W-CDMA'' is also common, plays almost no role anymore.
+*The success of UMB, however, seems to be more than questionable - at least in Europe - because even its predecessor "cdma2000", for which the term "W-CDMA" is also common, plays almost no role anymore.
-*''Worldwide Interoperability for Microwave Access'' (WiMAX) is a synonym for radio systems according to the IEEE standard 802.16. These are also intended to compete with LTE in a mobile variant.
+*"Worldwide Interoperability for Microwave Access" (WiMAX) is a synonym for radio systems according to the IEEE standard 802.16. These are also intended to compete with LTE in a mobile variant.
-*According to developers, there are currently (2011) already almost 600 WiMAX-based radio networks in 150 countries.
+*According to developers, there are currently (2011) already almost 600 WiMAX based radio networks in 150 countries.
 '''(2)'''&nbsp; Correct are the <u>answers 1 and 4</u>:
-*The ''relay nodes'' are quasi additional base stations at the edges of the cells and ultimately ensure improved service quality, as interruptions when switching between cells become less frequent.
+*The "relay nodes" are quasi additional base stations at the edges of the cells and ultimately ensure improved service quality, as interruptions when switching between cells become less frequent.
 *At the same time they increase the range.
@@ Line 85: / Line 85: @@
 '''(3)'''&nbsp; Correct are the <u>answers 2, 3 and 5</u>:
 *The most limiting factor for the data rate that can actually be achieved is that the users of mobile radio systems generally have to share the available bandwidth.
-*This is called &bdquo;Shared Medium&rdquo;. Voice connections slow down the network. In small cells without voice users, however, one almost reaches the specified rate.
+*This is called "Shared Medium".&nbsp; Voice connections slow down the network.&nbsp; In small cells without voice users, however, one almost reaches the specified rate.
 *But also shielding by walls or other obstacles lead to a lower data rate.
-*The hardware, on the other hand, is already sufficiently available today to actually achieve the theoretically possible transmission rates. Older devices will not be able to achieve the full speed, however.
+*The hardware, on the other hand, is already sufficiently available today to actually achieve the theoretically possible transmission rates.&nbsp; Older devices will not be able to achieve the full speed, however.
-'''(4)'''&nbsp; The only correct answers are <u>Answers 1</u>:
+'''(4)'''&nbsp; Correct is only <u>Answer 1</u>:
 *WiMAX is specified in two different standards, a mobile one, which offers a high range with still comparatively high data rates, and a stationary one, which for example has a range six times higher than WLAN in a typical urban scenario and thus wants to compete with this standard.
 *The achievable data rates of WiMAX and LTE are similar.
-*Answer 3 is explicitly wrong: The German government supports LTE, not WiMAX.
+*Answer 3 is explicitly wrong:&nbsp; The German government supports LTE, not WiMAX.
 {{ML-Fuß}}

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 - W-CDMA.
-{What is to be achieved with the ''Relay Nodes'' in LTE-Advanced?
+{What is to be achieved with the&nbsp; "Relay Nodes"&nbsp; in LTE-Advanced?
 |type="[]"}
 + A better QoS ("Quality of Service").
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-=== sample solution===
+===Solution===
 {{ML-Kopf}}

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 *The task belongs to the chapter&nbsp; [[Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE|LTE-Advanced - a further development of LTE]].
 *The above graphic shows some of the innovations in the transition from LTE to LTE-A.
-*In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://en.wikipedia.org/wiki/WiMAX WiMAX]&nbsp; and&nbsp; [http://en.itwissen.info/UMB-ultra-mobile-broadband.html UMB]&nbsp; (''Ultra Mobile Broadband'') are also referred to.
+*In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://en.wikipedia.org/wiki/WiMAX $\rm WiMAX$]&nbsp; and&nbsp; [https://www.electronics-notes.com/articles/connectivity/cdmaone-cdma2000/umb-ultramobile-broadband.php $\rm UMB$]&nbsp; (''Ultra Mobile Broadband'') are also referred to.

@@ Line 21: / Line 21: @@
 *The task belongs to the chapter&nbsp; [[Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE|LTE-Advanced - a further development of LTE]].
 *The above graphic shows some of the innovations in the transition from LTE to LTE-A.
-*In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://de.wikipedia.org/wiki/WiMAX WiMAX]&nbsp; and&nbsp; [http://www.itwissen.info/UMB-ultra-mobile-broadband.html UMB]&nbsp; (''Ultra Mobile Broadband'') are also referred to.
+*In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://en.wikipedia.org/wiki/WiMAX WiMAX]&nbsp; and&nbsp; [http://en.itwissen.info/UMB-ultra-mobile-broadband.html UMB]&nbsp; (''Ultra Mobile Broadband'') are also referred to.

@@ Line 3: / Line 3: @@
 }}
 [[File:EN_A_4_5_vers2.png|right|frame|New features for LTE-Advanced]]
-In summer 2011, LTE is now on the verge of commercial use, and construction and expansion work is currently underway in more and more major cities. Even if - as with previous standards - it will still take some time before all interested parties can enjoy the benefits of this fourth-generation mobile communications system: &nbsp; $ {\rm LTE}$&nbsp; is on the advance.
+Since summer 2011, LTE is on the verge of commercial use, and construction and expansion work is currently underway in more and more major cities.&nbsp; Even if - as with previous standards - it will still take some time before all interested parties can enjoy the benefits of this fourth-generation mobile communications system: &nbsp; $ {\rm LTE}$&nbsp; is on the advance.
 At the same time, the successor&nbsp; ${\rm LTE-Advanced}$&nbsp; (LTE-A for short) has already reached the final stage of specification.
 *In comparison to LTE, the speeds here are more than tripled, roughly speaking.
-*This shows that even in 2011 - almost 20 years after the initial euphoria - ''Moore's Law''&nbsp; can still be applied to mobile communications.
+*This shows that even in 2011 - almost twenty years after the initial euphoria - "Moore's Law"&nbsp; can still be applied to mobile communications.
 *Continuing technical development can be expected.
@@ Line 19: / Line 19: @@
 ''Notes:''
-*The task belongs to the chapter&nbsp; [[Mobile_Communications/LTE-Advanced_-_a_development_of_LTE|LTE-Advanced - a further development of LTE]].
+*The task belongs to the chapter&nbsp; [[Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE|LTE-Advanced - a further development of LTE]].
 *The above graphic shows some of the innovations in the transition from LTE to LTE-A.
 *In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://de.wikipedia.org/wiki/WiMAX WiMAX]&nbsp; and&nbsp; [http://www.itwissen.info/UMB-ultra-mobile-broadband.html UMB]&nbsp; (''Ultra Mobile Broadband'') are also referred to.

@@ Line 1: / Line 1: @@
-{{quiz-Header|Buchseite=Mobile Kommunikation/LTE–Advanced – eine Weiterentwicklung von LTE
+{{quiz-Header|Buchseite=Mobile_Communications/LTE-Advanced_-_a_Further_Development_of_LTE
 }}
 [[File:EN_A_4_5_vers2.png|right|frame|New features for LTE-Advanced]]

← Older revision		Revision as of 18:04, 22 July 2020
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	*In addition to LTE and LTE-Advanced, other newer standards such as  [https://de.wikipedia.org/wiki/WiMAX WiMAX]  and  [http://www.itwissen.info/UMB-ultra-mobile-broadband.html UMB]  (''Ultra Mobile Broadband'') are also referred to.		*In addition to LTE and LTE-Advanced, other newer standards such as  [https://de.wikipedia.org/wiki/WiMAX WiMAX]  and  [http://www.itwissen.info/UMB-ultra-mobile-broadband.html UMB]  (''Ultra Mobile Broadband'') are also referred to.

−	~~[[File:P_ID2296__A_4_5.png\|right\|frame\|Neuerungen bei LTE–Advanced]]~~

@@ Line 23: / Line 23: @@
 *In addition to LTE and LTE-Advanced, other newer standards such as&nbsp; [https://de.wikipedia.org/wiki/WiMAX WiMAX]&nbsp; and&nbsp; [http://www.itwissen.info/UMB-ultra-mobile-broadband.html UMB]&nbsp; (''Ultra Mobile Broadband'') are also referred to.
 [[File:P_ID2296__A_4_5.png|right|frame|Neuerungen bei LTE–Advanced]]
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 </quiz>

← Older revision		Revision as of 18:04, 22 July 2020
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	</quiz>		</quiz>

−	~~$\text{################################################################}$~~
−
−
−	~~===Fragebogen===~~
−
−	~~<quiz display=simple>~~
−
−	~~{Welche Standards stehen in direkter Konkurrenz zu LTE bzw. LTE–A?~~
−	~~\|type="[]"}~~
−	~~- LTE–B,~~
−	~~- LTE2,~~
−	~~+ WiMAX,~~
−	~~+ UMB,~~
−	~~- W–CDMA.~~
−
−	~~{Was soll mit den ''Relay Nodes'' in LTE–Advanced erreicht werden?~~
−	~~\|type="[]"}~~
−	~~+ Ein besseres QoS (''Quality of Service'').~~
−	~~- Höhere Übertragungsraten in der Nähe der Basisstationen.~~
−	~~- Eine größere Robustheit durch mehrfache gleichzeitige Übertragung.~~
−	~~+ Eine Erhöhung der Reichweite der Zellen.~~
−
−	~~{Warum werden die theoretisch möglichen Datenraten praktisch nicht erreicht?~~
−	~~\|type="[]"}~~
−	~~- Die Spezifizierung war zu optimistisch.~~
−	~~+ Viele gleichzeitige Nutzer führen zu einer Degradation.~~
−	~~+ Einfluss von Abschirmungen durch Gebäude, etc.~~
−	~~- Die verfügbare Hardware bremst das theoretisch schnelle Netz aus.~~
−	~~+ Es gibt Probleme mit der Umsetzung von Sprachverbindungen.~~
−
−	~~{Worin liegt das Potential von WiMAX und dessen Nachfolger?~~
−	~~\|type="[]"}~~
−	~~+ WiMAX bietet große Reichweiten und hohe Datenraten gleichermaßen.~~
−	~~- WiMAX ist wesentlich schneller als LTE bzw. LTE–Advanced.~~
−	~~- WiMAX wird durch die Bundesregierung besonders unterstützt.~~
−
−
−	~~</quiz>~~
	$\text{################################################################}$		$\text{################################################################}$