WRST 2/2+ IndexPlanning tasks
Module Objectives
At the end of the module you will be able to:
Understand radio network planning process
Understand main steps in dimensioning process
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Radio Network Planning Process
Radio Network Planning process
Radio Network Dimensioning process
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Radio network planning phases
PER SERVICE
Network configuration
Pre-launch optimisation
Practical site selection based on target site locations & available sites
Site implementation plan
Configuration Planning
Configuration planning is related to possible configurations as well as feature implementation
Future configuration takes into account the possibility to expand
Coverage & Capacity Planning
Coverage requirements needs to be met
Capacity requirements estimated + future expansions
Parameter planning
Detailed parameter planning
Optimised/verified parameter plan
Pre-planning activities are high especially when operator is Greenfield or deploying a new technology
Main focus in existing networks are in coverage & capacity as well as configuration planning
Optimisation is main task in overall network planning and it is always recommended to be done and kept as a very important task of network operation
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Overall Planning Process
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Dimensioning process can be split in high level steps:
Input data: has big influence on whole result
Cell Plan: needs to follow customer input & system performance
UTRAN Network Plan: needs to follow customer requirements and also detailed mapping to planned network conditions
UTRAN Final Network: is the result from the iterative analysis of inputs, performance values and also area & requirement mapping
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Traffic model & capacity requirements
similarly customer might have special requirements (e.g. road, train coverage)
when number of sites is fixed the traffic model, capacity/coverage and quality requirements are not as an input
More as an output of estimation (i.e. what can be achieved with X number of sites)
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Selected features & capacity requirements
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Basic information needed for dimensioning
frequency (e.g. 2100, 1900, 850)
Clutter type (e.g. dense urban, urban, suburban, rural).
Subscribers, subscribers/area
UE information
Body loss
Antenna & antenna gains
# of carriers, # of sectors
HSPA information
Scheduling type (e.g. RR or PF)
Number of codes, 5/10/15
Antenna height BS / UE
Building penetration loss
Coverage limiting service, UL DPCH (16/64/128/384), HSDPA (cell edge throughput) or HSUPA (cell edge throughput)
Planned load
Antenna gain
MHA usage
Based on cell plan
Main inputs:
Area size
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Capacity dimensioning
Link budget & Capacity dimensioning are connected to each other in order to model coverage & capacity iteration and impact on both parts
Capacity for:
DCH services
Spreading Code capacity
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DCH Link Budget calculation
Using default or project specific parameters
Identification of the limiting bearer in UL & DL
The one with the smallest cell range
Optional: Calculation of CPICH Link Budget in relation with the limiting bearer
Usage of the Link Budget results to the Capacity dimensioning
How many sites available within certain loading assumptions
Capacity & equipment calculation
Coverage dimensioning selection:
Output # of coverage sites
Coverage dimensioning
Capacity dimensioning
Link Budget calculation for:
using default or project specific parameters
HSDPA Link Budget calculation
Cell edge condition is always worst case
Throughput is still limited by many issues
UE capability
Available power & code tree
Identification of the limiting bearer in UL & DL (incl. HSDPA link)
The one with the smallest cell range
Optional: Calculation of CPICH Link Budget in relation with the limiting bearer
Capacity & equipment calculation
HSDPA capacity SINR
HSDPA features impact on capacity + needed HW
At cell edge ~350 kbps, macro cell
Many issues impacts
Same distance can mean totally different conditions
With macro cells close to own antenna there is no clear dominance, thus high possibility for interference,
With antenna location selection, height and tilting this can be enhanced and improved
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DCH Link Budget calculation
Using default or project specific parameters
HSDPA Link Budget calculation
Using default or project specific parameters
HSUPA Link Budget calculation
For cell edge throughput
Coverage dimensioning selection:
Link Budget HSDPA (based on cell edge throughput)
Link Budget HSUPA (based on cell edge throughput)
Output # of coverage sites
Coverage dimensioning
Capacity dimensioning
(coverage+
capacity)
Identification: limiting UL bearer (incl. HSUPA link) & DL (incl. HSDPA link)
The one with the smallest cell range
HSUPA: new challenges on dimensioning
HSUPA is sharing capacity between other UL services
HSUPA equipment dimensioning differs from R99 & HSDPA
When network HSPA services are increasing commonly additional carrier is needed (higher HSPA demand)
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Planning process can be divided to 3 main phases:
Pre-planning
Input Data
Cell Plan
Fixed Network
Plan - UTRAN
Final Network
UTRAN
Received pilot power = Pilot transmit power –Antenna line losses + Antenna gain
-(Max. pathloss–Planning margins)
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
0,45
0,6
0,75
0,9
1,05
1,2
1,35