04 Capacity Dimensioning
of 10
Transcript of 04 Capacity Dimensioning
-
7/27/2019 04 Capacity Dimensioning
1/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 1
Differences between GSM&UMTS
Hard blocking
Capacity hardwaredependent
Single service
Single Gos and Qos
requirement
Capacity dimensioning ErlangB
GSM WCDMA
Soft blocking
Capacity interferencedependent
Multi services (CS&PS)
Multi quality requirements
Capacity dimensioning
Multidimensional ErlangB
-
7/27/2019 04 Capacity Dimensioning
2/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
CS Capacity Dimensioning (1/2)
CS Services
Real time services
Gos requirement
Multidimensional ErlangB
Resources sharing
Meeting multi-Gos requirements Channels.
.
.
.
.
.
AMR12.2k
CS64
k
MultdimensionalErlangB Model
-
7/27/2019 04 Capacity Dimensioning
3/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
CS Capacity Dimensioning (2/2)
Multidimensional ErlangB - Resources shared
High Utilization of resources
Comparison between ErlangB and Multidimensional ErlangB
ErlangB - Partitioning Resources
Low Utilization of resources
-
7/27/2019 04 Capacity Dimensioning
4/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4
Best Effort for Packet Services
PS Services
Best effort
Retransmission
Bursty traffic
Total Load
CS Peak Load
CS Average Load
Load occupied by CS
Load occupied by PS
Load
Time
),max(BEPSaverageCSpeakCS
LoadLoadLoadTotalLoad
-
7/27/2019 04 Capacity Dimensioning
5/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5
R99 Capacity Dimensioning Flow
iiiob
iUL
RNE
WfL
)/(1
1)1(
ma xP
PL iiDL
iiAvgCS nectionLoadperConErlTrafficL )( jjAvgPS nectionLoadperConErlTrafficL )(
Dimensioning Start
Assumed Subscribers
CS Peak Cell Load
(MDE)
Yes
No
CS Average Cell Load PS Average Cell Load
=Target Cell Load?
Dimensioning End
Total Cell Load
Load per Connection
},max{AvgPSAvgCSpeakCS
LLLCellLoad
-
7/27/2019 04 Capacity Dimensioning
6/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6
HSDPA Capacity Dimensioning
Procedure
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
3.50%
4.00%
4.
22
2.
98
2.
04
1.
39
0.
96
0.
66
0.
45
0.
31
0.
21
0.
14
0.
1
0.
07
0.
05
0.
03
0.
02
0.
01
0.
01
0.
01 0 0 0 0
Ioc/Ior
Dis
tr
ibu
tion
pro
ba
bil
ity
DU Cell coverage Radius=300m
1.4Mbps
500kbps100kbps
Ioc/Ior decreases
-
7/27/2019 04 Capacity Dimensioning
7/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7
Capacity Dimensioning Case Study- R99
RND
Scenarios
Subscriber Density
HSDPA Peak Rate Requirement(Mbps)
Traffic Model Uplink Downlink
AMR12.2k(Erl) 0.015 0.015
CS64k(Erl) 0.001 0.001
PS64k(Kbit) 200 200
PS128k(Kbit) 0 400
PS384k(Kbit) 0 200
HSPA(Kbit) 0 800
Qos Requirement BLER Gos Requirement
AMR12.2k(Erl) 1% 2%
CS64k(Erl) 0.10% 2%
PS64k(Kbit) 5%
PS128k(Kbit) 5%
PS384k(Kbit) 5%
HSPA(Kbit) 10% Best Effort
Dense Urban
Capacity Parameters
5000
3.6
Cell radius for
capacity=0.44km
Total coverage area
Number of NodeB
for capacity =3
-
7/27/2019 04 Capacity Dimensioning
8/10
-
7/27/2019 04 Capacity Dimensioning
9/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9
Capacity Dimensioning Summary
CS and PS services could have different Gos
requirements
Capacity resources for CS and PS services could be
shared
Multidimensional ErlangB is used for CS services Cell radius has an impact on downlink cell capacity
HSDPA capacity dimensioning is dependent on
simulation results
HSDPA capacity dimensioning is to obtain the available
cell average throughput
-
7/27/2019 04 Capacity Dimensioning
10/10
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10
NodeB Number Dimensioning Summary
Cell capacity radius&
Number of subscribers per
site&Carrier configuration
Continuous coverage service
BLER requirement
Target load
Morphology related parameters
Link BudgetCell coverage
radius
Number of NodeB for
coverage
Propagation model
Total coverage area
Traffic Model
Total number of subscriber
Gos/BLER requrement
Capacity
dimensioning
Number of NodeB for
capacity
