Aufgaben:Exercise 3.9: Further Developments of UMTS - 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"

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

2020-12-16T13:16:30Z

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

← Older revision		Revision as of 12:37, 23 March 2021
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−	[[Category:~~Exercises for~~ Mobile Communications\|^3.4 Characteristics of UMTS^]]	+	[[Category:Mobile Communications: Exercises\|^3.4 Characteristics of UMTS^]]

@@ Line 4: / Line 4: @@
 [[File:P_ID2262__Mob_A_3_10.png|right|frame|Some&nbsp; $\rm GSM/UMTS$&nbsp; developments]]
-Shortly after the first release of GSM and UMTS, there were already efforts to significantly increase the transmission speed of data transmission.&nbsp; The following standardized system variants were developed:
+Shortly after the first release of&nbsp; GSM&nbsp; and&nbsp; UMTS, there were already efforts to significantly increase the speed of data transmission.&nbsp; The following standardized system variants were developed:
 *$\rm HSCSD$: &nbsp; "High-Speed Circuit-Switched Data",
 *$\rm GPRS$: &nbsp; "General Packet Radio Service",
 *$\rm EDGE$: &nbsp; "Enhanced Data Rates for GSM Evolution",
-*$\rm HSUPA$: &nbsp; "High Speed Uplink Packet Access",
+*$\rm HSUPA$: &nbsp; "High-Speed Uplink Packet Access",
-*$\rm HSDPA$: &nbsp; "High Speed Downlink Packet Access".
+*$\rm HSDPA$: &nbsp; "High-Speed Downlink Packet Access".
-HSUPA and HSDPA are also combined to form&nbsp; "High Speed Packet Access" &nbsp; &rArr; &nbsp; $\rm HSPA$.&nbsp; The above chart shows the data transmission rates of these advanced mobile communications standards, whereby we specify so-called "peak data rates" for HSCSD, GPRS and EDGE, which were difficult to achieve under real conditions&nbsp; (at least in the year 2012).
+HSUPA and HSDPA are also combined to form&nbsp; "High-Speed Packet Access" &nbsp; &rArr; &nbsp; $\rm HSPA$.&nbsp; The above chart shows the data transmission rates of these advanced mobile communications standards, whereby we specify so-called&nbsp; "peak data rates"&nbsp; for HSCSD, GPRS and EDGE, which were difficult to achieve under real conditions&nbsp; (at least in this year 2012).
@@ Line 19: / Line 19: @@
 *However, it has to be taken into account that under "best conditions",
 **HSCSD/GPRS/EDGE means a single user with a bandwidth of&nbsp; $400 \ \rm kHz$,&nbsp; and
-**HSUPA/HSDPA means a single user with a bandwidth of&nbsp; $5 \rm MHz$&nbsp; (i.e. even better conditions).
+**HSUPA/HSDPA means a single user with a bandwidth of&nbsp; $5 \ \rm MHz$&nbsp; (i.e. even better conditions).
@@ Line 93: / Line 93: @@
 '''(3)'''&nbsp; Correct are the <u>solutions 2 and 3</u>:
-*With HSCSD, the data rate that can be transmitted in one time slot is increased by&nbsp; $50 \ \%$&nbsp; from&nbsp; $9.6 \ \rm kbit/s$&nbsp; (with conventional GSM) to&nbsp; $14.4 \ \rm kbit/s$&nbsp; by puncturing the convolutional code.
+*With HSCSD, the data rate that can be transmitted in one time slot is increased by&nbsp; $50  \%$&nbsp; from&nbsp; $9.6 \ \rm kbit/s$&nbsp; (with conventional GSM) to&nbsp; $14.4 \ \rm kbit/s$&nbsp; by puncturing the convolutional code.
 *By bundling four time slots, the maximum transmission rate of&nbsp; $57.6 \ \ \rm kbit/s$&nbsp; is finally achieved with this circuit-oriented further developed GSM.
 *The best conditions are required for this.&nbsp; In reality, this theoretical value is rather not reached.

@@ Line 111: / Line 111: @@
 '''(6)'''&nbsp;<u>All solution suggestions</u> are correct:
-*At HSPA one uses the&nbsp; [[Examples_of_Communication_Systems/Further_Developments_of_UMTS#HARQ_procedure_and_.22Node_B_Scheduling.22|Hybrid ARQ procedure and "Node_B_Scheduling"]].&nbsp;
+*At HSPA one uses the&nbsp; [[Examples_of_Communication_Systems/Further_Developments_of_UMTS#HARQ_procedure_and_.22Node_B_Scheduling.22|Hybrid ARQ procedure and "Node B Scheduling"]].&nbsp;
 * In addition, modulation, coding and transmission rate are designed&nbsp; [[Examples_of_Communication_Systems/Further_Developments_of_UMTS#Adaptive_modulation.2C_adaptive_coding_and_adaptive_transmission_rate|adaptive]].
 *The optimization factor is not the data rate of individual users, but rather the largest possible cell capacity with regard to all mobile phone users.

@@ Line 111: / Line 111: @@
 '''(6)'''&nbsp;<u>All solution suggestions</u> are correct:
-*At HSPA one uses the&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Hybrid–ARQ–Verfahren]]&nbsp; as well as&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Node–B–Scheduling]].
+*At HSPA one uses the&nbsp; [[Examples_of_Communication_Systems/Further_Developments_of_UMTS#HARQ_procedure_and_.22Node_B_Scheduling.22|Hybrid ARQ procedure and "Node_B_Scheduling"]].&nbsp;
-* In addition, modulation, coding and transmission rate are designed&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#Adaptive_Modulation.2C_Codierung_und_.C3.9Cbertragungsrate|adaptiv]].
+* In addition, modulation, coding and transmission rate are designed&nbsp; [[Examples_of_Communication_Systems/Further_Developments_of_UMTS#Adaptive_modulation.2C_adaptive_coding_and_adaptive_transmission_rate|adaptive]].
 *The optimization factor is not the data rate of individual users, but rather the largest possible cell capacity with regard to all mobile phone users.

@@ Line 85: / Line 85: @@
 '''(1)'''&nbsp; Correct is only the <u>solution 4</u>:
 *Only HSDPA and HSUPA are further developments of UMTS.
-*HSCSD, GPRS and EDGE, on the other hand, are assigned to the GSM&ndash;phase $2+$.
+*HSCSD, GPRS and EDGE, on the other hand, are assigned to the GSM phase&nbsp; $2+$.
 '''(2)'''&nbsp; The <u>solutions 3 and 4</u> are applicable:
-*EDGE is actually also counted among the 3G&ndash;mobile phone systems, although it was created in the GSM&ndash;phase $2+$.
+*EDGE is actually also counted among the 3G mobile phone systems, although it was created in the GSM phase&nbsp; $2+$.
 '''(3)'''&nbsp; Correct are the <u>solutions 2 and 3</u>:
-*With HSCSD, the data rate that can be transmitted in one time slot is increased by $50 \ \%$ from $9.6 \ \rm kbit/s$ (with conventional GSM) to $14.4 \ \rm kbit/s$ by puncturing the convolutional code.
+*With HSCSD, the data rate that can be transmitted in one time slot is increased by&nbsp; $50 \ \%$&nbsp; from&nbsp; $9.6 \ \rm kbit/s$&nbsp; (with conventional GSM) to&nbsp; $14.4 \ \rm kbit/s$&nbsp; by puncturing the convolutional code.
-*By bundling four time slots, the maximum transmission rate of $57.6 \ \ \rm kbit/s$ is finally achieved with this circuit-oriented further developed GSM&ndash;.
+*By bundling four time slots, the maximum transmission rate of&nbsp; $57.6 \ \ \rm kbit/s$&nbsp; is finally achieved with this circuit-oriented further developed GSM.
-*The best conditions are required for this. In reality, this theoretical value is rather not reached.
+*The best conditions are required for this.&nbsp; In reality, this theoretical value is rather not reached.
 '''(4)'''&nbsp; Correct are the <u>statements 1 and 3</u>:
-*Packet-oriented transmission and some other measures leading to shorter access times result in a data transfer rate of up to $21.4 \ \rm kbit/s$.
+*Packet-oriented transmission and some other measures leading to shorter access times result in a data transfer rate of up to&nbsp; $21.4 \ \rm kbit/s$.
-*By bundling eight time slots (''Multislot Capability'') one reaches a maximum of $171.2 \ \ \rm kbit/s$ (this is also a theoretical value).
+*By bundling eight time slots&nbsp; ("Multislot Capability") one reaches a maximum of&nbsp; $171.2 \ \ \rm kbit/s$&nbsp; (but this is also a theoretical value).
-*As with conventional GSM, only ''Gaussian Minimum Shift Keying'' (GMSK) is used as modulation method.
+*As with conventional GSM, only "Gaussian Minimum Shift Keying" (GMSK) is used as modulation method.
 '''(5)'''&nbsp; Correct are <u> all proposed solutions</u>:
-*EDGE is also package-oriented and provides a total of nine different [[Examples_of_Communication_Systems/Weiterentwicklungen_des_GSM#Enhanced_Data_Rates_for_GSM_Evolution|Modulation and Coding Schemes]] (MCS) which are selected according to the channel conditions.
+*EDGE is also package-oriented and provides a total of nine different&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_des_GSM#Enhanced_Data_Rates_for_GSM_Evolution|Modulation and Coding Schemes]]&nbsp; (MCS) which are selected according to the channel conditions.
-*In the higher modes (MCS-5 and higher), the more compact modulation method 8-PSK is used instead of GMSK, in which three bits are transmitted with each input symbol, thus (theoretically) tripling the data rate.
+*In the higher modes (MCS-5 and higher), the more compact modulation method&nbsp; "8-PSK"&nbsp; is used instead of GMSK, in which three bits are transmitted with each input symbol, thus (theoretically) tripling the data rate.
-*With MCS-8 (according to the specification $54.5 \ \rm kbit/s$) and seven time slots, one reaches $380.8 \ \rm kbit/s$ and thus the order of magnitude of UMTS.
+*With MCS-8&nbsp; $($according to the specification&nbsp; $54.5 \ \rm kbit/s)$&nbsp; and seven time slots, one reaches&nbsp; $380.8 \ \rm kbit/s$&nbsp; and thus the order of magnitude of UMTS.
 '''(6)'''&nbsp;<u>All solution suggestions</u> are correct:
-*At HSPA one uses the [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Hybrid–ARQ–Verfahren]] as well as [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Node–B–Scheduling]].
+*At HSPA one uses the&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Hybrid–ARQ–Verfahren]]&nbsp; as well as&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#HARQ.E2.80.93Verfahren_und_Node_B_Scheduling|Node–B–Scheduling]].
-* In addition, modulation, coding and transmission rate are designed [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#Adaptive_Modulation.2C_Codierung_und_.C3.9Cbertragungsrate|adaptiv]].
+* In addition, modulation, coding and transmission rate are designed&nbsp; [[Examples_of_Communication_Systems/Weiterentwicklungen_von_UMTS#Adaptive_Modulation.2C_Codierung_und_.C3.9Cbertragungsrate|adaptiv]].
 *The optimization factor is not the data rate of individual users, but rather the largest possible cell capacity with regard to all mobile phone users.

@@ Line 67: / Line 67: @@
 |type="[]"}
 + It is packet-oriented instead of circuit-oriented.
-- It also uses 8-PSK modulation.
++ It also uses 8-PSK modulation.
 + Several time slots can be combined.

@@ Line 30: / Line 30: @@
 *This task refers to the chapter&nbsp; [[Mobile_Communications/Characteristics_of_UMTS|Characteristics of UMTS]].
-*Particular reference is made to the page &nbsp;  [[Mobile_Communications/Characteristics_of_UMTS#UMTS_extensions_HSDPA_and_HSUPA|UMTS extensions HSDPA and HSUPA]].
+*Reference is also made to the page &nbsp;  [[Mobile_Communications/Characteristics_of_UMTS#UMTS_extensions_HSDPA_and_HSUPA|UMTS extensions HSDPA and HSUPA]].
@@ Line 38: / Line 38: @@
 <quiz display=simple>
-{Welche der folgenden Standards basieren auf der UMTS–Technologie?
+{Which of the following standards are based on UMTS technology?
 |type="[]"}
 - HSCSD,
@@ Line 45: / Line 45: @@
 + HSPA.
-{Which of the following standards does one count as the 3rd generation of mobile phones?
+{Which of the following standards belong to the 3rd generation of mobile phones?
 |type="[]"}
 - HSCSD,
@@ Line 55: / Line 55: @@
 |type="[]"}
 - Through the packet-oriented system architecture.
-+ Through a higher code rate ( puncturing of the convolutional code.
++ Through a higher code rate (puncturing of the convolutional code).
 + By combining several time slots.
@@ Line 65: / Line 65: @@
-{Which of the following characteristics characterize HSPA?
+{Which of the following features characterize HSPA?
 |type="[]"}
 + HSDPA/HSUPA use hybrid ARQ and node scheduling.
 + Modulation, coding and transmission rate are adaptive.
-+ Adaptation is made with regard to the largest cell capacity.
++ Adaptation is made with regard to the maximum cell capacity.

@@ Line 3: / Line 3: @@
 }}
-[[File:P_ID2262__Mob_A_3_10.png|right|frame|Some GSM/UMTS developments]]
+[[File:P_ID2262__Mob_A_3_10.png|right|frame|Some&nbsp; $\rm GSM/UMTS$&nbsp; developments]]
-Shortly after the first release of GSM and UMTS, there were already efforts to significantly increase the transmission speed of data transmission. The following standardized system variants were developed:
+Shortly after the first release of GSM and UMTS, there were already efforts to significantly increase the transmission speed of data transmission.&nbsp; The following standardized system variants were developed:
-*HSCSD: &nbsp; ''High-Speed Circuit-Switched Data,''
+*$\rm HSCSD$: &nbsp; "High-Speed Circuit-Switched Data",
-*GPRS: &nbsp; ''General Packet Radio Service,''
+*$\rm GPRS$: &nbsp; "General Packet Radio Service",
-*EDGE: &nbsp; ''Enhanced Data Rates for GSM Evolution,''
+*$\rm EDGE$: &nbsp; "Enhanced Data Rates for GSM Evolution",
-*HSUPA: &nbsp; ''High Speed Uplink Packet Access,''
+*$\rm HSUPA$: &nbsp; "High Speed Uplink Packet Access",
-*HSDPA: &nbsp; ''High Speed Downlink Packet Access.''
+*$\rm HSDPA$: &nbsp; "High Speed Downlink Packet Access".
-HSUPA and HSDPA are also combined to form ''High Speed Packet Access'' &nbsp; &rArr; &nbsp; HSPA. The above chart shows the data transmission rates of these advanced mobile communications standards, whereby we specify so-called "peak data rates" for HSCSD, GPRS and EDGE, which were difficult to achieve under real conditions (at about 2012).
+HSUPA and HSDPA are also combined to form&nbsp; "High Speed Packet Access" &nbsp; &rArr; &nbsp; $\rm HSPA$.&nbsp; The above chart shows the data transmission rates of these advanced mobile communications standards, whereby we specify so-called "peak data rates" for HSCSD, GPRS and EDGE, which were difficult to achieve under real conditions&nbsp; (at least in the year 2012).
 The indicated rates for HSUPA and HSDPA are now quite realistic.
-The standard has been modified several times. In 2012, the „peak data rates” for HSUPA have been denoted as &nbsp;  $6 \ \rm Mbit/s$&nbsp;, and equivalently for HSDPA&nbsp;  $28.8 \ \rm Mbit/s$&nbsp;.
+*The standard has been modified several times.&nbsp; In 2012, the „peak data rates” for HSUPA have been denoted as &nbsp;  $6 \ \rm Mbit/s$&nbsp;, and equivalently for HSDPA&nbsp;  $28.8 \ \rm Mbit/s$&nbsp;.
-*However, it has to be taken into account that under "best conditions", HSCSD/GPRS/EDGE means a single user with a bandwidth&nbsp; $400 \ \rm kHz$&nbsp; and HSUPA/HSDPA means a single user with a bandwidth&nbsp; $5 \rm MHz$&nbsp; (i.e. even better conditions).
+*However, it has to be taken into account that under "best conditions",
@@ Line 27: / Line 29: @@
 ''Notes:''
-*This task belongs to the chapter&nbsp;  [[Mobile_Communications/Die_Charakteristika_von_UMTS|Die Charakteristika von UMTS]].
+*This task refers to the chapter&nbsp; [[Mobile_Communications/Characteristics_of_UMTS|Characteristics of UMTS]].
-*Particular reference is made to the page &nbsp;  [[Mobile_Communications/Die_Charakteristika_von_UMTS#UMTS.E2.80.93Erweiterungen_HSDPA_und_HSUPA|UMTS–Erweiterungen HSDPA und HSUPA]].
+*Particular reference is made to the page &nbsp;  [[Mobile_Communications/Characteristics_of_UMTS#UMTS_extensions_HSDPA_and_HSUPA|UMTS extensions HSDPA and HSUPA]].

@@ Line 72: / Line 72: @@
 </quiz>
-===Sample solution===
+===Solution===
 {{ML-Kopf}}