Transcript
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
HUAWEI TECHNOLOGIES CO., LTD.
Kuwait Zain 3G MS Project HSUPA Data Rates
December 05 , 2011
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
HSUPA Evolution Roadmap
This feature is the enhancement of the
HSUPA Phase 1. The main
enhancement includes:
1- Peak rate: 5.76 Mbit/s per user (5.74
Mbit/s (MAC) per user)
2- 2 ms / 10 ms TTI
3- Max users per cell : 60
4- UL compress mode (10 ms and 2
ms)
5- Enhanced fast UL scheduling
6- SRB over HSUPA.
7- E-AGCH Power Control (Based on
CQI or HS-SCCH)
This feature is the enhancement of the
UL R99. The main enhancement
includes:
1- HSUPA UE Category 1 to 7
2- HSUPA HARQ and Fast UL
Scheduling in Node B
3- HSUPA DCCC
4- Interactive and Background Traffic
Class on HSUPA
5- HSUPA 1.44Mbps per User
6- 20 HSUPA Users per Cell
RAN10.0
RAN6.1
This feature is the enhancement of the
HSUPA Phase 2. The main
enhancement includes:
1- HSUPA EFD
2- UL 16QAM
3- UL L2 Improvement
RAN12.0
HSUPA
Phase 1
HSUPA
Phase 2
HSPA+
Phase 2
1.44 Mbps
11.5 Mbps
5.74 Mbps
Zain UMTS Network
is almost here!
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
HSUPA Theoretical Background
• HSUPA TTI definition
The TTI for a service over HSUPA can be 2 ms or 10 ms. When the TTI is 2 ms, higher
throughput can be achieved. When the TTI is 10 ms, wider coverage can be achieved. The
HSUPA TTI selection feature can dynamically change the TTI from 2 ms to 10 ms on the edge for
wider coverage or from 10 ms to 2 ms for higher throughput. In this way, call drops are reduced
and the quality of service (QoS) is ensured.
•peak data rate (E-DCH Category 6)
For a 10ms TTI UE:
For a 2ms TTI UE,
sMbitsMbitSF
McpstePeakDataRa /2/92.14
)4(284.3
sMbitSFSF
McpstePeakDataRa /76.5)2
)2(2
4
)4(2(84.3
10 ms TTI 2 ms TTI
Category 3 2 x SF4 10 ms only 1.45 – 1.92
Category 6 2 x SF4 + 2 x SF2 10 ms and 2 ms 2 5.74 5.76
E-DCH
Category
Max. Capability
CombinationE-DCH TTI
Max. Data Rate (Mbit/s)
Air InterfaceMAC Layer
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4
HSUPA CE Consumption table
SF Number of CE consumed Max. Data Rate (Mbit/s) E-DCH Category
SF32 1 0.064
SF16 2 0.128
SF8 4 0.256
SF4 8 0.384
2 x SF4 16 1.92
2 x SF2 32 3.84 Category 5
2 x SF4 + 2 x SF2 48 5.76 Category 6
2 x SF4 + 2 x SF2 64 11.52 Category 7
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5
HSUPA Initial BitRate & Rate Adjustment (DCCC)
• When setting up a HSUPA RAB, a certain initial bitrate is directly assigned to the user
• Based on the requested throughput, RNC will either increase or decrease the assigned
throughput according to a set of adjustment rates (steps)
• During tests different initial bitrates/adjustment rates were put to test:
Previous Set Current Set
Initial bitrate (kbps)
384 1280
Enabled adjustment rates
(kbps)
128 608 384 1280
1280 2048
2048 5440
Note: rates adjustment reverted back
to previous steps after testing.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6
HSUPA Testing Scenarios
• Evaluating user experience with different sets of initial bitrates / adjustment
rates o Higher initial rate & less steps gives better experience, but causes more resource
utilization
o Lower initial rate & more steps gives accepted experience, but causes less resource
utilization
• Licensing RNC the following features:
o HSUPA 2ms/10ms TTI
o HSUPA 5.74Mbps per User
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7
Practical Cases Analysis
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8
Comparison Practical Cases
HSUPA Initial BitRate: 1280 kbps
HSUPA Adjustment Rates (Steps):
1- 608 kbps 2- 1280 kbps 3- 2048 kbps
step1
step2
step3
step1
step2
10ms TTI 10ms / 2ms TTI
Available Bandwidth could reach 2048kbps only with 2ms TTI enabled
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9
Comparison Practical Cases
10ms TTI 10ms / 2ms TTI
UE requesting more throughput,
But 2048kbps step is never reached
UE having stable throughput
almost at maximum available bandwidth
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10
Comparison Practical Cases
step1
step2
step3
10ms TTI 10ms / 2ms TTI
•When the upload session finishes, allocated bandwidth is reduced to conserve radio resource
•If any higher throughput is requested, DCCC will increase bandwidth accordingly
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 11
Practical Cases for HSUPA 5.74Mbps
Available Bandwidth could reach 5440 kbps only with 2ms TTI enabled
10ms / 2ms TTI 10ms / 2ms TTI
step1
step2
step3
step4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 12
Traces
HSUPA 2ms TTI
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Field investigation
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Field investigation
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15
Thanks!
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