Upload
taouachi
View
79
Download
4
Tags:
Embed Size (px)
DESCRIPTION
Huawei
Citation preview
P-0
Confidential Information of Huawei. No Spreading Without Permission
Note instruction
Font: FrutigerNext LT Regular
Font Size: 11
Item symbol Size: 70%
Row Space: 1.25
Segment: 3 pound
WCDMA HSPA&HSPA+ Dimensioning
P-1 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-2 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-3 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-4 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-5 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-6 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Continuous coverage target service requirement with specific coverage probability
should be given for R99
Cell edge throughput requirement with specific coverage requirement should be given
for HSDPA
P-7 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The cell total transmit power is the constant resources. The DL power consists of the
following three parts:
Power of the HSPA DL physical channel (HS-PDSCH, and HS-SCCH)
Common channel power
DPCH power
P-8 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Fast power control
For R99, power control margin should be considered
For HSDPA, the maximum transmission power for HS-PDSCH is the
remaining power excluding R99 power and power margin, and no power
control margin
SHO gain
For R99, SHO gain should be considered
For HSDPA, only hard handover, no SHO gain
HSDPA related parameters should be configured when simulation
Max number of HS-PDSCH channel
Min number of HS-PDSCH channel
HSDPA power allocation, dynamic or fixed
HS-SCCH power allocation, dynamic or fixed
Max number of HSDPA users
Scheduling Algorithm
P-9 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-10 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
DL Coupling Loss :
PL_DL: Downlink path loss
Lf_BS: cable loss of NodeB
Ga_antenna: Gain of UE antenna and NodeB antenna
Lb: Body loss
SFMNSHO: Slow fading margin without soft handover
Lp: Penetration loss
Cell edge Ec/No:
PHS-DSCH : total power of HS-DSCH channel
: non-orthogonality factor
: neighbor cell interference factor
: downlink load factor including R99 and HSDPA service
Pmax : max transmission power of downlink
Nt : thermal noise power spectral density , typical value is -108.16dB
NF : receiver noise figure of UE, typical value is 7dB
f
DL
P-11 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The theoretical maximum throughput is decided by the number of HSDPA codes.
For HSDPA, soft handover gain and fast fading margin should not be considered in
link budget , since neither power control nor soft handover in HS-PDSCH channel
P-12 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The step is present below:
According to the Cell Radius comes from R99 dimensioning, the Downlink
Path Loss can be calculated
According to the Downlink Path Loss , the Downlink Coupling Loss can be
calculated
According to the Downlink Coupling Loss and HS-DSCH Power, Cell Edge
Ec/No can be calculated
According to the Cell Edge Ec/No and simulation result, Cell Edge Throughput
can be calculated
P-13 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The step is present below:
According to the Cell Edge Throughput and simulation result, Cell Edge Ec/No
can be calculated
According to the Cell Edge Ec/No and HS-DSCH Power, the Downlink
Coupling Loss can be calculated
According to the Downlink Coupling Loss, the Downlink Path Loss can be
calculated
According to the Downlink Path Loss and and Propagation Model, HSDPA
Cell radius can be calculated
P-14 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The step is present below:
According to the Cell Radius comes from R99 dimensioning, the Downlink
Path Loss can be calculated
According to the Downlink Path Loss , the Downlink Coupling Loss can be
calculated
According to the Cell Edge Throughput and simulation result, Cell Edge Ec/No
can be calculated
According to the Downlink Coupling Loss and Cell Edge Ec/No , HS-DSCH
Power can be calculated
P-15 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-16 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-17 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-18 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-19 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
HSDPA Capacity Dimensioning
to obtain the average cell throughput
based on HSDPA simulation result
considering the gain of HSDPA scheduling
the maximum data rate is limited by the available power, available codes
resource and UE capacity
higher cell target load can be available for HSDPA
P-20 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
During the HSDPA capacity dimensioning procedure, we know the Cell Coverage
Radius (obtained from the coverage planning) and Cell Average Throughput
(obtained from the traffic model), and we want to get the HSDPA Power Allocation
based on simulation
Ior: The power spectral density for the WCDMA signal of the cell
Ioc: The power spectral density for the interference, excluding thermal noise
P-21 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-22 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-23 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Due the technical features of the WCDMA, compared with the 2G systems such as
GSM, the RNC and Node B present enormous capacity. For example, for the fully
configured NodeB, the number of channels of one carrier is 128, which is more than
10 times of that supported by a TRX of GSM. One uplink processing unit of our
NODEB has the processing capacity of 128 12.2kbps voice channels. One 3*1
WCDMA BTS is equivalent to the GSM sites of one S10/10/10. At the beginning of
the WCDMA network construction, so high a capacity is not a necessity, and only a
portion of it is required (e.g., 10%). If we offer the quotation based on the maximum
hardware channel capacity of TRX like the GSM, it will make the operators incur
enormous cost and mismatch the user quantity. To reduce the initial investment, the
operator is bound to pay the equipment price to the supplier according to the actual
use capacity, and, subsequently, pay more equipment prices with the increase of the
user quantity. This way, the operator will reduce the initial investment and mitigate the
risks.
Specifications of the WBBP board:
P-24 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Softer HO CE: 3900 series NodeB doesnt need extra CE resource, but 3800 series NodeB needs extra CE resource
HSUPA shares CE resource with R99 services: that means the HSUPA E-DCH
shares CE resource with R99 services
P-25 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The mapping relationship of Channel Elements consumption for each bearer is based
on Uplink 2-way diversity
In the case of uplink 4-way diversity, the CE consumption is shown below:
Bearers CE (4-way diversity)
AMR12.2k 2
CS64k 4
PS64k 4
PS128k 8
PS384k 16
Detailed and recently updated data should be referred to the newest issued notice of
"UMTS RAN Product Specificaiton".
P-26 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
HSDPA Traffic:
Separate dedicated module processing HSDPA Traffic so HSDPA traffic does
not occupy any R99 CE resource.
HS-DSCH and HS-SCCH does not affect base band capacity for R99 services.
HS-DPCCH
HS-DPCCH doesnot consume any R99 Channel Element since its base band
resource is reserved in BBU module.
UL A-DCH (DPCCH)
PS64k is recommended to bear uplink user data, TCP acknowledgement and
signaling.
One PS64k consumes 3 CE in uplink.
DL A-DCH (DPCCH)
A-DCH bears DL signaling control.
A-DCH can be beared on HSDPA since RAN10.0 if SRB over HSDPA is
adopted. With this feature, downlink A-DCH doesnt consume CE.
P-27 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
HSDPA channels doesnt occupy R99 CE resource, but we should calculate the A-DCH CE.
P-28 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-29 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-30 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Link dimensioning intends to estimate the system coverage by analyzing the factors
of the propagation channels of the uplink signal and downlink signal. It is the link
analysis model.
If the parameters such as transmit signal power, gain and loss of the transmitter and
receiver, and quality threshold of received signal are known or estimated, the allowed
maximum path loss used for ensuring the quality of received signal can be calculated.
When HSUPA be introduced, the peak rate of PS service will increase, the ratio of
peak rate to average rate will increase, the capability of device to process the signal
will be affected. The UE power backoff need to be consided.
P-31 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Given cell radius, the maximum available path loss of HSUPA can be calculated
based on propagation models. According to HSUPA link budget procedure given
before, cell edge NodeB receiver signal strength is obtained.
Similar with that of HSDPA cell edge throughput calculation, the achievable HSUPA
physical layer throughput at certain Ec/No and BLER is interpolated through existing
simulation results.
HSUPA Mac layer throughput equals to the product of physical layer throughput and
(1-SBLER).
P-32 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-33 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
SBLER: Schedule Block Error Rate at the MAC layer, which is calculated through the
following formula: Number of transmission failures/Total number of transmissions x
100%.
From simulation result of HSUPA given in the former page, both channel model and
SBLER have impact on the relationship between Ec/N0 and HSUPA physical Layer
throughput.
In addition, HSUPA UE category and NodeB capability also influence the mentioned
simulation result.
P-34 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-35 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
FFM: Fast Fading Margin
SHO: Soft Handover
MDC: Macro Diversity Combination
P-36 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
The simulation result shows that the receiver sensitivity of HSUPA is better than that
of R99
P-37 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Due to fast NodeB scheduling, uplink load of HSUPA is more stable than that of R99
and hence HSUPA could operate at higher load.
However, higher load of HSUPA would shrink cell coverage if the network is uplink-
coverage limited.
For HSUPA, target uplink cell load is dependent on the trade off between cell
coverage and capacity.
If the operator wants higher uplink capacity and could tolerate smaller coverage,
uplink load larger than 50% could be adopted.
P-38 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-39 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-40 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
With the introduction of HSUPA, a lower uplink margin for preventing overload
situations can be used, because the fast resource allocation and control mechanisms
in the NodeB can potentially remove excessive load quickly
P-41 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
When R99 and HSUPA share one carrier, HSUPA actual cell load equals to total
uplink load minus HS-DPCCH load, R99 load and A-DCH load.
The maximum rate of single user is the upper limit of HSUPA data rate achievable at
distance R.
P-42
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-43
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-44 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
HSUPA will use the spare load apart from that of R99, HS-DPCCH and A-DCH
in uplink
P-45 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-46 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-47
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-48
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-49
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-50
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-51 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
If SRB over HSUPA is adopted, it is no necessary to use the HSUPA A-DCH.
P-52 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
UsersPerNodeB : subscribers per NodeB
: CE consumed by HSUPA bearer rate: AvgUserRateHSUPA /(1-SBLER)
PSHO : SHO overhead
PHSUPABurst : HSUPA burst margin
BLER: Qos requirement of application layer
AvgUserRateHSUPA : HSUPA user average throughput in Kbit
For Huawei RAN10, the maximum NUser_HSUPA_NodeB is 60 per NodeB
HSUPA
P-53 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
If SRB over HSDPA is adopted, it is no necessary to use the HSUPA A-DCH.
P-54
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-55 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
Only A-DCH of HSUPA may consume downlink CE resources: if the SRB over
HSDPA is on, downlink A-DCH doesnt consume downlink CE.
P-56
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-57
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-58
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-59
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-60
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-61
Confidential Information of Huawei. No Spreading Without Permission
Ior/Ioc CQI user throughput
Ior/Ioc CQI user throughput
The figures showed in this slide is from the link level simulation from HUAWEI
High-order modulation is very sensitive to interference, for 64QAM, there is almost no
coverage gain at cell edge
64QAM can bring users higher throughput under good radio condition compared to
HSPA
PA3 is a model with relatively fewer multiple paths
The analysis based on Ior/Ioc is reasonable for HSDPA throughput because CQI is
related to the interference. When CQI is lower, the user throughput is lower
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-62
Confidential Information of Huawei. No Spreading Without Permission
For micro scenario, higher capacity gain can be obtained compared to macro cells
due to the less interference from the neighboring cells
DAS: Distributed Antenna System
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-63
Confidential Information of Huawei. No Spreading Without Permission
If SRB over HSDPA is enabled
0 Channel Element required in downlink.
If SRB over HSDPA is not enabled
1 link consumes 1 Channel Element in downlink.
The CE Consumption principle of DL 64QAM is same with DL 16QAM
In this slide, link means RL Link
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-64
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-65
Confidential Information of Huawei. No Spreading Without Permission
The figures showed in this slide is from the link level simulation from HUAWEI
Compared with 16QAM, MIMO gets better performance across the cell
MIMO provides cell coverage extend compare to HSDPA
User throughput gets higher improvement with MIMO in good RF condition
For MIMO, Integrated MIMO with automatic adaptation of single stream in low Ior/Ioc
(cell edge) gives the best coverage extend. Dual stream MIMO gives far better user
experience in the same location compare to HSPA.
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-66
Confidential Information of Huawei. No Spreading Without Permission
For PA3 channel model, to MIMO dual stream, the coverage gain at cell edge is ~0%
compared to HSDPA 16QAM; ~15% coverage gain at cell middle; and throughput
gain is in the range of 50%~80% near site
Why the coverage of MIMO dual stream is almost the same as that of HSDPA
16QAM while larger throughput gain near site? The main reason is that dual stream
halves the HSDPA power to each of the two streams (e.g. if HSDPA power is 10W,
each stream of the dual stream is 5W), the SINR of each of the dual stream is very
low when the radio condition is not good, which result in the low throughput.
However, when the radio condition changes to be good, the function of dual stream
will play it role and brings higher throughput
For MIMO single stream, it brings 40%~60% coverage gain at cell edge compared to
HSDPA 16QAM. ~15% at cell middle, and ~0% near site
Why single stream brings high coverage gain at cell edge? Single stream adopts TX
diversity in downlink and obtain diversity gain. When the radio condition is bad, TX
diversity play important role compared no TX diversity
MIMO single stream can be switched into dual stream, vise versa. NodeB determine
the final selection between single stream or dual stream according to the CQI
reported from UE. Single stream is the same as the R99 STTD. Single stream can
improve coverage compared to no TX diversity, dual stream can improve capacity
under good radio condition
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-67
Confidential Information of Huawei. No Spreading Without Permission
Users are uniformly distributed in the cells
DU: Dense Urban
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-68
Confidential Information of Huawei. No Spreading Without Permission
If SRB over HSDPA is enabled
0 Channel Element required in downlink.
If SRB over HSDPA is not enabled
1 link consumes 1 Channel Element in downlink.
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-69
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-70
Confidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
CPC provides obviously capacity gain to VOIP services
CPC provides capacity gain to services which are periodically bursting such as VOIP,
Gaming, WEB Browsing
Almost no capacity gain to FTP service because the data transmission is continuous
P-71
Confidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
More VOIP users helps to achieve higher total cell average throughput
Higher uplink loading, more performance improvement
P-72
Confidential Information of Huawei. No Spreading Without Permission
HS-SCCH less operation feature of CPC in the downlink saves the power of NodeB
and allocate these power for service channel and improve the cell capacity in the
downlink
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-73
PB3 is model with multiple paths, and the interference between paths is strong
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-74
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-75
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-76
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-77
Confidential Information of Huawei. No Spreading Without Permission
Ior/Ioc CQI user throughput
Ior/Ioc CQI user throughput
The figures showed in this slide is from the link level simulation from HUAWEI
For DC-HSDPA, there is almost no coverage gain at cell edge, but DC-HSDPA
extend coverage rang of services with same data rate compared to SC-HSDPA
DC-HSDPA can brings users higher throughput and smaller response time for burst
service under good radio condition compared to SC-HSDPA
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-78
Confidential Information of Huawei. No Spreading Without Permission
For link budget, at cell edge, the coverage gain is 0% compared to SC-HSDPA with
16QAM
It should be noted that in radio network planning, the user throughput at cell edge is
generally the focus of mobile operators. The analysis based on Ior/Ioc is reasonable
for HSDPA throughput because the CQI is related to the interference, when CQI is
lower, the throughput is lower
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-79
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-80
Confidential Information of Huawei. No Spreading Without Permission
For micro scenario, higher capacity gain can be obtained compared to macro cells
due to the less interference from the neighboring cells
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-81
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-82
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-83
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-84
Confidential Information of Huawei. No Spreading Without Permission
Ior/Ioc CQI user throughput
Ior/Ioc CQI user throughput
The figures showed in this slide is from the link level simulation from HUAWEI
For MIMO, Integrated MIMO with automatic adaptation of single stream in low Ior/Ioc
(cell edge) gives the best coverage extend, dual stream MIMO gives far better user
experience in high Ior/Ioc(near site)
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-85
Confidential Information of Huawei. No Spreading Without Permission
Single stream and dual stream can be changed automatically based on Ior/Ioc (dual
stream can be used when Ior/Ioc>15dB.)
For MIMO dual stream, the coverage gain at cell edge is ~0% compared to HSDPA
16QAM; ~15% coverage gain at cell middle; and throughput gain is in the range of
50%~80% near site. Why the coverage of MIMO dual stream is almost the same as
that of HSDPA 16QAM while larger throughput gain near site? The main reason is
that dual stream halves the HSDPA power to each of the two streams (e.g. if HSDPA
power is 10W, each stream of the dual stream is 5W), the SINR of each of the dual
stream is very low when the radio condition is not good, which result in the low
throughput. However, when the radio condition changes to be good, the function of
dual stream will play it role and brings higher throughput
For MIMO single stream, it brings 40%~60% coverage gain at cell edge compared to
HSDPA 16QAM. ~15% at cell middle, and ~0% near site. Why single stream brings
high coverage gain at cell edge? Single stream adopts TX diversity in downlink and
obtain diversity gain. When the radio condition is bad, TX diversity play important role
compared no TX diversity
MIMO single stream can be switched into dual stream, vise versa. NodeB determine
the final selection between single stream or dual stream according to the CQI
reported from UE. Single stream is the same as the R99 STTD. Single stream can
improve coverage compared to no TX diversity, dual stream can improve capacity
under good radio condition
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-86
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-87
Confidential Information of Huawei. No Spreading Without Permission
Users are uniformly distributed in the cells
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-88
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-89
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-90
Confidential Information of Huawei. No Spreading Without Permission
The gain of UL 16QAM is available when the UL target load is higher than 75%
Raise user peak rate and cell throughput up to 35%
Obtain higher performance in Micro cell and indoor area than in Macro cell
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-91
Confidential Information of Huawei. No Spreading Without Permission
IC(Interference Cancellation) is a multi-user detection technique
Lab radio test scenario:
Dual Receive Antenna in NodeB
IC resource: 12 codes(Scrambling codes)
Single cell test
No FDE(frequency domain equalization )
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-92
Confidential Information of Huawei. No Spreading Without Permission
FDE(frequency domain equalization) can reduce the interference from multi-path so
as to increase the received signal quality and uplink throughput
The gain in the scenarios with little multi-path like PA3 is less than 10%. But in the
scenarios abundant in multi-path, the gain is obvious higher and up to 36% in lab test
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-93
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-94
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-95
Confidential Information of Huawei. No Spreading Without Permission
Simulation condition :
Urban scenario
PA3 channel mode
Speed: 3km/h
DL Neighbor Cell Load: 50%
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-96
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-97
Confidential Information of Huawei. No Spreading Without Permission
Simulation condition :
Urban scenario
PA3 channel mode
Speed: 3km/h
DL Neighbor Cell Load: 50%
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-98
Confidential Information of Huawei. No Spreading Without Permission
Similarly, cell throughput of DC-MIMO (64QAM) has 23% gain over 64QAM due to
the coactions of DC and MIMO
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-99
Confidential Information of Huawei. No Spreading Without Permission
Confidential Information of Huawei. No Spreading Without Permission
WCDMA HSPA&HSPA+ Dimensioning
P-100
DC-HSUPA coverage is slightly inferior to SC-HSUPA coverage because the
secondary carrier uses the DPCCH for power control and so consumes additional
uplink power. This defect can be relieved by enabling the HSUPA TTI Selection
feature or coverage-based BE service fallback from the E-DCH to DCH algorithm.
To support a peak rate of 23 Mbit/s, the RoT threshold must be raised. A higher RoT
threshold may result in smaller cell coverage, a higher service drop rate, and a lower
handover success rate. This defect can be relieved by enabling the Dynamic Target
RoT Adjustment feature. The Dynamic Target RoT Adjustment feature minimizes the
impact of a higher RoT.
By estimation, the coverage of DC-HSUPA is shrank about 4.4% compared to SC-
HSUPA.
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-101
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-102
Impact on uplink capacity dimensioning ,mainy come from scheduling gain
Simulation Condition
Noise Rise: 6 dB
Static test, no limit of UE power
FTP full buffer uploading
Total UE number: 2/4/6/8/16, evenly distributed in 2 cells
SC-HSUPA: cat 6; DC-HSUPA: Cat9
Channel model: AWGN
Simulation Conclusion
DC throughput has 2.46% gain due to DC system scheduling in 2 cells when
2 Users
DC throughput has -5.99% gain due to too much power cost for secondary
carrier DPCCH when 8 Users
AWGN (Additive White Gaussian Noise)
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-103
WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-104 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission
P-105 WCDMA HSPA&HSPA+ Dimensioning
Confidential Information of Huawei. No Spreading Without Permission