This document summarizes a presentation on radio network planning for 3G networks. It discusses key concepts in radio network planning like cell configuration, interference management, frequency reuse, and mobile network evolution. It then covers the specific steps in 3G radio network planning, including dimensioning, nominal planning, simulation, and optimization. The document provides examples of link budget calculations and using planning software to simulate network performance and verify the design meets requirements.
14. 3G WCDMA - Wideband CDMA
Radio access technology for one of the UMTS access modes (UTRA FDD) using 5 MHz duplex channels.
– Frame length is of 10 msec, Chip rate is 3.84 Mcps – All users share the same frequency and time domain – Users separated by the codes
20. Radio Network Planning
-RNP Overview
-Objective
-GSM and 3G Planning Differences
-Radio Network Dimensioning
-Power Link Budget
21. Radio Network Planning Overview
Radio Network Planning?
According to deployment and evolution requirements, as well as cost- effectiveness consideration, generate the amount of Network Elements (NE), NE configuration, and Transmission design between different NE.
RNS
RNC
RNS RNC
Core Network Node B
Node B
Node B
Node B
Iu
Iu Iur
Iub Iub
Iub
Iub Network Planning Scope：
•Core network：focus on CN element dimension and configuration.
•Radio network：focus on RAN element dimension and configuration
•Transmission network：focus on link dimension and configuration between network elements.
22. Radio Network Planning Solution
•3G Radio network planning (NodeB/RNC)
•3G Transmission network planning (Iu/Iur/Iub)
•3G Core network planning (CS/PS domain)
3G RNP tools development
Network KPI
Pilot pollution
Soft-handover ratio and probability
Access probability of
different services
Best Server Distribution
CE dimension
Estimation result
23. Objectives of Network Planning
The RF Design of wireless system revolves four main principles. These principles are Coverage, Capacity, Quality and Cost. And further, adapt to the future network development and expansion. Coverage Capacity
Quality Cost Realization of excellent balance of all aspect via networks planning
24. GSM and 3G Planning Differences
•Realize 1×1 frequency reuse
•The capacity per WCDMA cell is “soft” for it is related to environment and neighbor cell interference.
•Supports multiple services with different speed rate and QoS, and each service has different coverage range.
•Adopts cellular network structure and frequency planning to guarantee intra/inter-frequency interference
•Users supported can be calculated from carriers and timeslots if the interference meets the requirements.
•Provides voice service
GSM
3G
26. Radio Network Dimensioning
Coverage related
Coverage area
Coverage probability
Capacity related
Traffic model
Service model
User density
Quality related
QoS requirements
GoS requirements
Demodulation threshold
System dimensioning
Number of sites
System configuration
Sector structure
Number of carriers
Cost on network construction
Site cost
Equipment cost
Input Output
Coverage design
Capacity design
27. Power Link Budget
Receiver Sensitivity
PDCH_Max
Minimum Required Signal Strength
EiRP
PUE_Max
• Slow Fading Margin
• Penetration Loss TX RX Duplexer
Antenna
UE PL_DL PL_UL
• Body Loss
• Interference Margin
• Fast Fading Margin
• Margin for Background Noise
TX
RX
Duplexer
Cable Antenna
Node B
• Interference Margin
• Fast Fading Margin
• Margin for Background Noise
Soft Handover
Area
• SHO Gain
32. Nominal Planning
Based on the result of network dimension, preliminary design present Information of theoretical sites including following :
Site coordinates.
Engineering parameters such as Antenna height, azimuths and tilts.
Radio parameters such as scrambling code ,transmit power of different channels , etc.
35. Simulation is one of Important Step for Network Planning
Simulation is oriented to simulate the running situation of networks under the current network configuration so as to facilitate decision-making adjustment. Adopt the planning software to perform simulation based on various types of BTS coverage area, the number of BTSs within the coverage area, and the configuration of each BTS. All these are obtained from traffic coverage analysis.
36. Introduction Atoll Software
•Be a professional radio network design tool, supporting GSM/TDMA, GPRS-EDGE, cdmaOne, W-CDMA/UMTS and CDMA2000/1x RTT/EVDO. It is specially designed for 3G.
•Realize mobility of planning design, supporting both single system configuration and Enterprise server-based network configuration. The single system configuration does not require connecting external database and users still can share engineering data.
•Feature modern software structure as well as open and extendable platform
38. Atoll Simulation Step
1.Preparation
2.Start Project
3.Configure Coordinate
4.Import Digital Maps
5.Set Propagation Model
6.Draw Zone
7.Make Prediction based on Coverage
8.Monte Carlo Simulation
9.Make Prediction based on Simulation
10.Check Planning Results
41. Composition of a Digital Map
A digital map basically consists of the following three components, stored under three directories respectively.
•Heights : Digital elevation model (DEM): describe basic landforms of this area and directly participate in radio propagation model calculation
•Clutter : Digital clutter model (DOM): clutter classification data describes clutter coverage on the ground, such as forest, lake, open area, industrial area, urban area, high-storey building area. It is used during calculating radio propagation path loss.
•Vector : Linear vector model (LDM): linear clutter vector data describes plane distribution and space relationship of linear clutters, including speedway, street and river.
42. Simulation Output
Simulation Parameter
•Pilot coverage (Ec, Ec/Io) in the target areas
•Best server plot
•Coverage probability distribution of each service
•Access failure distribution and statistic of each service
•Continuous coverage areas of each service
•Cell load distribution of downlink and uplink
•Pilot pollution distribution
•Soft handover areas statistic of each service
43. Task and Excercise
•Find map of Yogyakarta City
•Find number of users in Yogyakarta City
•Plot Cells
–Based on Calculation of Coverage Cell
–Based on Capacity Calculation
52. Verification by System Simulation
It is an iterative process to verify the final design until all the requirements are fulfilled
Coverage prediction
RNP Planning
results
Are Requirements Fulfilled?
Traffic distribution
System simulation
