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it is HSDPA Principle
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HSDPA SYSTEM TECHNIQUES
Why HSDPA
HSDPA Motivation
1048707Reasons to deploy HSDPA -Saturated voice communication market -Growing demand and user expectation for the data services like broadband
internet access streaming gaming etc -Competing High Speed wireless technologies
-WLAN -WiMAX -1xEvDo in CDMA 2000
1048707Requirements -Short set-up and transfer delays -High system capacity -High peak data rates -Low mobility (user speed max 3kmh) -Low data transfer costs
New Transport and Physical channels
HS-DSCH ndash High-Speed Downlink Shared Channel transport channel carries user data
HS-PDSCH- High Speed Physical Downlink Shared Channel Physical downlink channel carries user data layer2 overheads bits over air interface
HS-SCCH- High-Speed Shared Control Channel physical control channel carries control information regarding how to decode the information on HS-PDSCH and which UE shall decode it
HS-DPCCH ndash High Speed Dedicated Physical Control Channel Physical Uplink channel for sending ACKNACK reports and channel quality indicator
Radio Techniques
Adaptive Modulation and Coding (AMC)
Hybrid Automatic Repeat Request (H-ARQ)
Fast transmissionretransmission scheduling
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Why HSDPA
HSDPA Motivation
1048707Reasons to deploy HSDPA -Saturated voice communication market -Growing demand and user expectation for the data services like broadband
internet access streaming gaming etc -Competing High Speed wireless technologies
-WLAN -WiMAX -1xEvDo in CDMA 2000
1048707Requirements -Short set-up and transfer delays -High system capacity -High peak data rates -Low mobility (user speed max 3kmh) -Low data transfer costs
New Transport and Physical channels
HS-DSCH ndash High-Speed Downlink Shared Channel transport channel carries user data
HS-PDSCH- High Speed Physical Downlink Shared Channel Physical downlink channel carries user data layer2 overheads bits over air interface
HS-SCCH- High-Speed Shared Control Channel physical control channel carries control information regarding how to decode the information on HS-PDSCH and which UE shall decode it
HS-DPCCH ndash High Speed Dedicated Physical Control Channel Physical Uplink channel for sending ACKNACK reports and channel quality indicator
Radio Techniques
Adaptive Modulation and Coding (AMC)
Hybrid Automatic Repeat Request (H-ARQ)
Fast transmissionretransmission scheduling
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
New Transport and Physical channels
HS-DSCH ndash High-Speed Downlink Shared Channel transport channel carries user data
HS-PDSCH- High Speed Physical Downlink Shared Channel Physical downlink channel carries user data layer2 overheads bits over air interface
HS-SCCH- High-Speed Shared Control Channel physical control channel carries control information regarding how to decode the information on HS-PDSCH and which UE shall decode it
HS-DPCCH ndash High Speed Dedicated Physical Control Channel Physical Uplink channel for sending ACKNACK reports and channel quality indicator
Radio Techniques
Adaptive Modulation and Coding (AMC)
Hybrid Automatic Repeat Request (H-ARQ)
Fast transmissionretransmission scheduling
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
HS-DPCCH ndash High Speed Dedicated Physical Control Channel Physical Uplink channel for sending ACKNACK reports and channel quality indicator
Radio Techniques
Adaptive Modulation and Coding (AMC)
Hybrid Automatic Repeat Request (H-ARQ)
Fast transmissionretransmission scheduling
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Radio Techniques
Adaptive Modulation and Coding (AMC)
Hybrid Automatic Repeat Request (H-ARQ)
Fast transmissionretransmission scheduling
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Adaptive Coding R99 RAB fixed amount of Turbo bits applied
to correct errors FER bits Forward Error Correction HSDPA number of FER bits adapted to the
radio environment Adaptation based on the Channel Quality
Indicator (CQI) CQI is estimated by the UE UE can benefit from the high data rate due to
fewer FER bits
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Poor Radio Environment
Good
RBS
User data bitError correction bit
high data ratelow protection
Low data ratehigh protection
Adaptive Coding
CQICQI
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Adaptive Modulation HSDPA channel supports three modulation
schemesQPSK One modulation symbol represents 2 bits
16QAM One modulation symbol represents 4 bits 64QAM One modulation symbol represents 6 bits Modulation scheme selected based on CQI
reported by UE 1664QAM support is optional Configurable on RBS level
parameters supportOf16qam amp featureState64Qam
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
Modulation Symbol
Adaptive ModulationPoor Radio Environment
Good
QPSK(2
bitssymbol)
16 QAM(4
bitssymbol)
64 QAM(6
bitssymbol)
CQICQI CQI
RBS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
HSDPA Multi Code Transmission HS DL shared channel new TrCH in HSDPA- cell radio resources are dynamically shared between
users - Resources to be shared codes amp power
Offers efficient code and power utilization Reduces the risk for code-limited capacity
Maximum 15 codes (SF16) used for shared DL channel
The number of codes used per user depend on reported CQI
Codes allocated to user only when possible to be used
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
HSDPA Multi Code Transmission
15 x SF16 =gt 15(384X10616) = 36X106 symbolssecQPSK (2bitssymbol) =gt 36X106 x 2 = 72 Mbps16QAM (4bitssymbol) =gt 36X106 x 4 = 144 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 = 216 Mbps64QAM (6bitssymbol) =gt 36X106 x 6 x 2 = 432 Mbps (MIMO)
SF=16
SF=8
SF=4
SF=2
SF=1
Remaining codes used for signalling
Physical rates
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization13
Status Indication(resend 2 3 and 5)
8 7 6 5 4 3 2 1
Polling ARQ System
8 7 6 5 4 3 2 1
Polling bit
Transmitter Receiver
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
copy Ericsson AB 2009 07038 13-ENLZU 108 7768 Rev A Figure 7- HSPA Optimization14
HARQ with Soft CombiningFrame
7 ARQ 1 ARQ 1P12
ARQ 1 ARQ 11 P11 NACK (buffered)
2 ARQ 2 ARQ 2P21 ACK
3 ARQ 3 ARQ 3P31 ACK
4 ARQ 4 ARQ 4P41 ACK
5 ARQ 5 ARQ 5P51 ACK
6 ARQ 6 ARQ 6P61 ACK
ACKP11 and P12 Soft combined
THANKS
THANKS
