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use only
GU Radio Network Swap Service Proposal
Solution Name
GU900 Refarming Solution
Product Version
V1.0
Confidentiality level
For internal use only
Total 51Page
GU900 Refarming Solution Service
Proposal
Prepared by：
Reviewed by：
Reviewed by：
Approved by：
2017-05-03
Date：
Date：
Date：
Date：
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GU900 Refarming Solution Service
Proposal
Key words
GU900, Refarming, Proposal, MRFSSP 00043
Abstract
This document describes the service proposal of GU900 Refarming solution
including following information based on Operator’s requirements:

Overview of network swap process

Service process workflow and deliverables

Service Proposal

Project Responsibility Matrix
Revision Record
Date
Version Description
Review
Author
2011-6-28
1.0
Wang Qi
Li Leifeng
v1 Release
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1.
2.
3.
4.
5.
For internal
use only
The Service Proposal must be modified according to different projects and
different contracts by front line marketing staff in field to form specific
Service Proposal to Operator.
For blue italics, please add, modify and update depend on project
requirements.
For red italics, please update the Operator name.
The note only for reminder, it must be deleted by the front line marketing
staff in field.
Please delete the above page before submit to Operator by marketing
staff in field.
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GU900 Refarming Solution Service
Proposal
Huawei Technologies Co., Ltd.
All Rights Reserved
2017-05-03
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Content
Content ...................................................................................................................... 5
1 Refarming Introduction ...................................................................................... 9
1.1 Motivation for Refarming................................................................................................... 9
1.2 Highlights & Chanllenges .................................................................................................. 9
2 Service Overview ............................................................................................... 10
2.1 Deployment Scenario ....................................................................................................... 11
2.2 Service Process ................................................................................................................. 11
2.1 Service Value .................................................................................................................... 12
3 Service Description ............................................................................................ 13
3.1 Network Assessment ........................................................................................................ 13
3.2 Radio Network Design ..................................................................................................... 14
3.2.1 GU900 Refarming Solution Design ........................................................................ 14
3.2.2 GU Site Planning..................................................................................................... 18
3.2.3 Buffer Zone Planning .............................................................................................. 19
3.2.4 GSM Intelligent Frequency Optimization ............................................................... 22
3.2.5 GSM&U900&U2100 Inter-RAT Operation Design ................................................ 26
3.2.6 U900 Cell Parameter Design ................................................................................... 30
3.3 GSM&U900 Rollout ........................................................................................................ 33
3.3.1 GSM Traffic Migration ........................................................................................... 34
3.3.2 G1800 Expansion&Overbuild ................................................................................. 34
3.3.3 U900 Rollout ............................................................ Error! Bookmark not defined.
3.4 Optimization ..................................................................................................................... 36
3.4.1 GSM RF Optimization ............................................................................................ 36
3.4.2 UMTS Radio Network Initial Tuning ..................................................................... 37
3.4.3 GSM&U900&U2100 Inter-RAT Operation Optimization ...................................... 39
3.4.4 Non-standard Bandwidth New Feature Introduction and Optimization (optional)
......................................................................................................................................... 39
3.4.5 GU Network Performance Assurance ..................................................................... 40
3.5 Acceptance ....................................................................................................................... 42
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4 Project Implementation .................................................................................... 43
4.1 Organizational Structure ................................................................................................... 44
4.2 Schedule ........................................................................................................................... 45
4.3 Responsibility Matrix ....................................................................................................... 45
5 Huawei Experience ............................................................................................ 47
6 Conditions ........................................................................................................... 48
7 Acronyms and Abbreviations .......................................................................... 49
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Figures
Figure 2-1 Overview of Network Swap Process ................................................................... 12
Figure 3-2 GU buffer zone area ............................................................................................. 20
Figure 3-3 Multilayer strategy for CBD ................................................................................ 27
Figure 3-4 Multilayer strategy for Urban/Suburban areas ..................................................... 28
Figure 3-5 Multilayer strategy for Rural areas ...................................................................... 29
Figure 3-6 Principle for Frequency Redesign based on MR .................................................. 23
Figure 4-1 Refarming Solution Organizational Structure ...................................................... 44
Figure 5-1 Huawei Refarming Service Share ........................................................................ 47
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Tables
Table 2-1 Typical Deployment Scenario for Refarming ........................................................ 11
Table 3-1 Network Evaluation Deliverables .......................................................................... 14
Table 3-2 Advantage and Disadvantage of Spectrum Allocation ........................................... 15
Table 3-3 Refarming Solution Design HLD Deliverables ..................................................... 17
Table 3-4 GU Site Planning Deliverables .............................................................................. 19
Table 3-5 Buffer Zone Planning Deliverables........................................................................ 21
Table 3-6 Inter-RAT Operation Planning Deliverables .......................................................... 30
Table 3-7 U900 Cell Parameter Planning Deliverables ......................................................... 32
Table 3-8 Advantage and Disadvantage of Frequency Reuse after Refarming ...................... 35
Table 3-9 GSM Traffic Migration LLD Deliverables ............................................................ 36
Table 3-10 G1800 Expansion & Overbuild Deliverables ...................................................... 34
Table 3-11 Main Activities for Frequency Redesign .............................................................. 25
Table 3-12 GSM Network Frequency Redesign Deliverables ............................................... 25
Table 3-13 Non-standard Bandwidth New Feature Introduction Deliverables ...................... 40
Table 3-14 GSM RF Optimization Deliverables .................................................................... 37
Table 3-15 UMTS Radio Network Tuning Service Deliverables........................................... 39
Table 3-16 UMTS Rollout and Optimization Deliverables.................................................... 42
Table 3-17 Network KPI Commitments ................................................................................ 43
Table 4-1 Role Description of Refarming Solution ............................................................... 44
Table 4-2 Responsibility Matrix of Refarming solution ........................................................ 45
Table 7-1 Acronyms and Abbreviations ................................................................................. 49
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1
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Refarming Introduction
Refarming is a strategy that telecom operators reuse their frequency resources and
introduce new radio communication technologies to improve the spectrum
efficiency and data throughput.
1.1
Motivation for Refarming
The explosive growth of mobile data services has created an urgent need for
expanded 3G coverage to increase PS service capacity. UMTS technically
possesses higher frequency efficiency than GSM. UMTS band VIII and EGSM use
the same spectrum resources (UL: 880 - 915 MHz; DL: 925 - 960 MHz) and can
thus share them. On July 27, 2009, the EU approved a new directive allowing
refarming in the 900 MHz band. Now operators with the 900 MHz band have
greater flexibility and efficiency in deploying UMTS broadband networks through
spectrum refarming. By allocating a segment of 900 MHz band resources to
UMTS, operators do not need to make large investments in new spectrum
resources while ensuring GSM network operation and frequency efficiency is
improved.
Refarming has begun to spread rapidly throughout the industry, with equipment
manufacturers successively offering Refarming-oriented products and solutions.
After Finland's Elisa launched the world's first UMTS900 system in November
2007, a number of refarming commercial deployments rapidly appeared.
As of April 2010, 321 UE models already support UMTS900, forming a
large-scale industry chain. By 2015, UMTS900 penetration is expected to reach
100% of UEs.
1.2 Highlights & Chanllenges
The better propagation properties of 900MHz compared to 2100MHz reduces the
number of base stations required to provide coverage in given areas, which
implying lower CAPEX and OPEX.
U900 in urban areas improves in-building coverage, therefore reduces the cost to
construct in-building systems.
Rapid traffic growth (in particular data traffic) in U2100 network consumed the
spectrum. Thus, U900 network could be built to share the 3G traffic load and
enhance UMTS coverage.
In addition to its numerous advantages, refarming also presents a number of
challenges to network planning and performance. These include:
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
Suppress Interference
Mutual interference between U900 and G900 in refarmed areas will impact
network performance, it includes co-channel guard band between refarmed
area and un-refarmed area, adjacent frequency interference between GSM and
UMTS, internal inference within GSM. How to mitigate and suppress
interference to ensure network performance?

Balance Capacity
After refarming, GSM frequency resources are significantly reduced, but in
the near term, quantities of GSM user will be unchanged or may even slightly
increase. Necessary capacities improve method like AMR HR and G1800
expansion / overbuild etc. need to be adopted to bear traffic. How to balance
G900/G1800, U2100 and U900 capacity?

Legacy Reuse
What would G900 antennas system, coordinate, space and hardware of
equipment be shared with U900, in order to help further save costs?
Otherwise, limited G1800 coverage and technology obsolescence will
requires prudent investment options to relief G900 traffic.

Multi-network Cooperation
U900 will coexist with G900/G1800, U2100, the traditional inter-RAT
operation cannot meet demands of multi-network cooperation, and it will
bring new challenges. Such as:
•
Inter-RAT operation between GSM and UMTS
•
Multi-carrier strategy between U900 and U2100
•
Double band network strategy between G900 and G1800
2
Service Overview
Hyper competitive mobile market in xxx and sparsely distributed population
forced Operator to acquire and maximize the lower band frequency, to provide
reliable 3g services to their customers. Unlike xxx and xxx, xxx lacks the 850MHz
spectrum to compete effectively i.e. xxx needs to refarm its 900MHz spectrum and
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incorporate U900 and G900 on the same spectrum. For smoother operation in
GSM, refarming and retuning for GSM1800 should also be conducted to be able to
accommodate the users migrating from GSM900 due to reduction in resource.
Huawei GU900 refarming solution is based on an advanced radio technology
which supports the coexistence or mixing of multiple frequency bands and
wireless standards. A successful Radio Network Design is one of key factors for
Operator. A high-quality Radio Network Design realizes Operator’s business
plans in the 2G/3G modernization solutions.
2.1 Deployment Scenario
The typical deployment scenario for refarming as below:
Table 2-1 Typical Deployment Scenario for Refarming
Scenario
Description
Extend 3G
Coverage in
Sub-urban &
Rural





Improve 3G
Coverage in
Urban Area
Initial 3G
Rollout in All
Areas





Figure
No UMTS service coverage yet
Voice traffic is low, easy to release
frequencies for UMTS
Poor or no fixed broadband
Indoor coverage is not good
Blind spots in dense urban
Capacity supplementary for UMTS
2.1Ghz
Frequent handover between UMTS
2.1Ghz and GSM 900Mhz due to
coverage quality difference
No 3G service yet anywhere
No 2.1Ghz spectrum
Sufficient 900Mhz spectrum for
network-wide refarming
2.2 Service Process
The general service process is visualized as follows in the Figure 2-1
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Network
Assessment
Radio Network
Design
Traffic Model
Analysis
Coverage
Evaluation
GSM/U900
Rollout
Optimization
Spectrum Allocation
GU Site Integration
RF Optimization
Site Acceptance
Antenna Solution
RNC
Commissioning
Inter-RAT Operation
Optimization
GSM Network
Performance
Acceptance
Expansion /
Overbuild
New Feature
Introduction and
Optimization
(optional)
U900 Network
Performance
Acceptance
Traffic Migration
Antenna Evaluation
Acceptance
GU Site Planning
(optional)
Traffic Migration
KPI Analysis
Buffer Zone Planning
BSS / RAN Feature
Analysis
Drive Test
(optional)
Mobile Backhaul
Network Evaluation
(optional)
G900 Offload
GSM Intelligent
Frequency
Optimization
New Frequency
Loading
GSM/U900/U2100
Inter-operability
Design
U900 Data
Configuration &
Script Execution
Performance
Assurance
Cell Parameter Design
BSS & RAN HLD/LLD
Mobile Backhaul
Network Redesign
(optional)
Figure 2-1 Overview of GU900 Refarming Solution Service Process
2.1 Service Value
Huawei offers Operator a customized and competitive GU900 refarming solution
with the following HIGHLIGHTS:

Accurate and flexible network design solution to apply different
refarming scenario (swap, urban, rural, )

Cost saving to reuse legacy to protect investment( i.e. antenna, frequency
spectrum etc..

Securable network performance by proven planning and optimization
capability

Professional project management to help customer time-to-market for
2G refresh and U900 launch
WE ARE READY: Depend on Huawei’s global experience sharing, MV
frequency redesign and E2E network planning and design capacities, a
professional RF team with rich field experiences is being organized to design and
delivery refarming solution.
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Service Description
3.1 Network Assessment
1. Input

MR date

Existing KPI

Existing BSS/RAN feature

Digital map

Engineering parameter
2. Service Description
Through assessment current network, the weak coverage and service distribution
of the current network can be dig out, so that we can define the valuable business
spot, provide reasonable advice to the deployment of U900. At the same time, we
can master the performance, feature and feeder and antenna solution of the current
network thus provide the exact input value for the latter refarming design solution.
If the DT KPI should be needed after refarming, the benchmark criterion can be
provided by current network assessment.
Coverage and Service Assessment
The aim of refarming is introducing the U900 network construction. How to
deployment the most reasonable site situation for the continuous or layered
coverage? Base on the MR data, Huawei will evaluate coverage, define service
distribution and high traffic area, and guide follow-up U900 site planning.
Benchmark DT Assessment (optional)
In order to provide the benchmark criterion after refarming, we should evaluate
DT data before refarming. The DT data may serve as the basis for optimization.
Control the interference area by RF optimization will offer the prerequisite for
collecting MR data accurately during frequency redesign.
Antenna, Feature and Transmission Assessment
The feeder and antenna system occupies considerable proportion in network
construction costs, if the current feeder and antenna system sharing with the new
U900 system will save the network construction costs. At the same time, The
BSS/RAN feature and transmission bandwidth resource have been commissioned
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will impact on designing refarming solution also. These items should be evaluation
before designing refarming solution.
3. Deliverables
Table 3-1 Network Evaluation Deliverables
Item
Activities
1
Network
Evaluation
Report
Content





Remark
Traffic model
Poor coverage area
DT evaluation report
Proposed U900 site list
Transmission bandwidth Limited
The contents could be
changed according to
different projects and
different contracts.
3.2 Radio Network Design
3.2.1 GU900 Refarming Solution Design
1. Input

Spectrum resource and frequency reuse before and after refarming

Engineering parameter

Terminal penetration rate

Refarming area scenario

AMR-HR proportion

Acceptance KPI formula

Purchased feature and launched feature

Antenna strategies after refarming etc.
2. Service Description
The design of the GU900 refarming solution is one of the most important elements
in enabling Operator to provide a high-quality service to end-users at a
competitive cost level. It contains the following content.
Spectrum
Allocation
Design
Antenna Solution
Design
Traffic
Migration
Design
Feature Design
Frequency
Strategies
Design
GU900 Spectrum Resource Design
Because GSM frequency resource will decrease after refarming, GSM frequency
redesign is necessary. GSM frequency redesign can use tight frequency reuse or
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loose frequency reuse, it should consider traffic migration and GSM offload based
on network configuration and traffic.
Re-allocate a part of frequency band to new radio technical standard based on
Operator’s spectrum resource. Usually there are two distribution ways, edge
allocation or sandwich allocation.
 Note：
The content should be customized and modified according to different project and provided
recommended advice.
Table 3-2 Advantage and Disadvantage of Spectrum Allocation
Allocation
Advantage
Disadvantage
Sandwich
 No Interference problem need to be
re-considered for the UMTS900and
other operator’s system.
 Save more GSM frequencies while
using non-standard separation
 Facilitate GSM frequency planning
and expanding to second UMTS
Edge
 Only one side GU interference needs
to be considered
 Discontinuous
frequencies make GSM
frequency planning more
complicated.
 Frequency gap f2 of
2.6MHz
should
be
reserved
between
UMTScarrier and the
adjacent GSM carrier of
other operator.
Antenna Solution Design
For different wireless technical standards, they have different received sensitivity,
transmit power and demodulation threshold. That will bring different coverage
radius for different standard site.
In the refarming scenario, a UMTS system is built on the basis of the existing
GSM system. In this case, reuse of the existing antenna system can reduce the
network construction cost for Operator. Huawei recommends that a co-antenna
solution be used if joint coverage is provided by collocated UMTS900 and
GSM900 systems. Otherwise, a UMTS900 and GSM900 co-antenna system is not
recommended due to its impact on network performance.
In order to balance the cost and performance deterioration, Huawei engineer
should design different antenna-feeder solution for environments like rural,
suburban and urban. Antenna-feeder design include separate antenna, share
four-port antenna and share two-port antenna.
Advantages of the co-antenna solution include:

Network construction costs are lower. Feeders and antennas are shared
between the GU systems, which lowers materials and labor costs.
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
Roof space usage is reduced. There is no need for additional radio towers or
lifting poles, and thus costs related to space rental, radio towers, and lifting
poles are lower.

The reduced number of antennas avoids public opposition to the construction
of new antennas.
Traffic Migration Design
GSM frequency resources are substantially reduced after UMTS900 refarming. In
order to guarantee that the tightness of frequency reuse does not increase
unacceptably, the GSM900 carrier configuration must be lowered. GSM traffic
will not fall in the short term, however, and in some areas may even increase
slightly. This may result in the occurrence of blockage. This issue may be
addressed through traffic migration and tight frequency reuse.
There are three trends in traffic migration, include terminal proportion, current
GSM spectrum resource and users number, high speed data service development
strategy. According to the different trend, Huawei will design different traffic
migration strategy. The following measures are available:

AMR-HR
AMR-HR offers the same voice quality as that of FR channels but uses only
half of the air interface bandwidth. If AMR-HR is not enabled in the existing
network of Operator, the Operator is advised to adopt the AMR-HR function
as well as lowered configuration and loose frequency reuse. If AMR-HR is
enabled in the existing network, the AMR-HR load can be increased to enable
the network to support more HR channels.

GSM900 traffic migration to the DCS1800
Most current UEs support both GSM900 and G1800, so GSM900 traffic can
be migrated to the G1800. If conditions are met, Co-BCCH networking or
dual-frequency networking can be adopted to migrate traffic from GSM900 to
G1800. Cell reselection and handover parameters may also be configured to
give priority to G1800 in absorbing 2G traffic. Otherwise, if the coverage and
capacity of G1800 is limited, the expansion is necessary.

GSM900 traffic migration to the UMTS2100
When GSM900 traffic cannot be shared by the DSC1800, 2G/3G
interoperability can be used to migrate GSM900 traffic to the UMTS. This
strategy depends on the penetration of GSM900+UMTS2100 or
GSM900+UMTS900+UMTS2100 dual-mode UEs.
Feature Design
After the feature of flexible bandwidth or tight frequency reuse is used, in order to
minimize the influence on GSM as far as possible will bring the interference
problem between G900 and U900, the necessary interference mitigation methods
should be taken in the network planning phase. And then the feature license should
be purchased by Operator.

Interference Suppression and Anti-interference Feature Design
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The 1x1 or 1x3 RF hopping solution can be adopted for tighter frequency
reuse. In this case, anti-interference technology including ICC, EICC, and
SAIC should be applied in conjunction with conventional power control and
DTX interference suppression functions. Tight frequency reuse sacrifices
network quality for capacity, and thus network KPIs and user experience are
noticeably degraded.

Non-standard Bandwidth Feature Design (optional)
Flexible bandwidth feature can improve the spectrum efficiency which means
applied the non-standard bandwidth (3.8M/4.2M) in UMTS900 network, if the
flexible bandwidth feature is adopted by Operator, the following optional
GSM feature is recommend to be applied together for reduce inference to the
GSM.

GBFD-117602 Active Power Control

GBFD-117601 HUAWEI III Power Control Algorithm

GBFD-114801 Discontinuous Transmission (DTX)-Downlink

GBFD-114803 Discontinuous Transmission (DTX)-Uplink
Frequency Strategies Design
Some frequency redesign principle from the angle of decreasing the
interference between G900 and U900 should be taken in the frequency
redesign phase. Such as the following content:

The GSM ARFCN adjacent to the UMTS carrier should not be
configured as a BCCH carrier. Instead, the BCCH should be deployed at
a GSM ARFCN that is at least 2.6 MHz away from the UMTS ARFCN.

Avoiding Non-Standard-GU-Separation ARFCNs in the same GSM cell
if the sandwich frequency allocation mode is adopted.

Design different frequency redesign strategies according to the following
scenarios: co-site deployment and separate site deployment of
UMTS900 and GSM900.

To avoid the serious impacts, it is recommended that frequencies with
non-standard separation not be used in indoor GSM cells etc..
3. Deliverables
Table 3-3 Refarming Solution Design Deliverables
Item
Activities
1
Refarming
Solution
Design Report
Content





2017-05-03
Remark
GU900 spectrum resource allocation
Antenna solution design
Traffic migration design
Feature strategies
Frequency redesign strategies
HUAWEI Confidential
The contents could be
changed according to
different projects and
different contracts.
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3.2.2 GU Site Planning
Defining the initial location of new site through evaluating the current network,
co-site mode or new site mode may be selected. In order to guarantee the network
performance, maybe the G900 traffic be migrated to G1800. If the coverage of
G1800 is not continuous, the new G1800 BTS should be constructed to absorb the
traffic of G900. Whatever by what kind of means, when define the final GU site
location, on site survey and simulation evaluation are needed.
1. Input

The Propagation Model has been tuned or agreement on similar model from
propagation model library.

Nominal site list with site configuration (Site Size, Antenna Type).

Search ring specifications.

Maps.
2. Service Description
General, for new site, the site locations are preplanned according to building
information on the map. They may not suitable for deploying an actual site. During
site selection, you can select several candidate sites around the site locations
suggested in the preplanning. After detailed survey and simulation evaluation,
determine the final sites the most suitable for radio network coverage according to
the priorities and availability of candidate sites. You need to determine a
responsibility matrix with the Operator according to different scenarios and
delivery modes. Generally, site selection is completed in the following steps: site
search, site survey, and site evaluation.
After site survey, evaluation, and acquisition, determines a final list of sites which
will be designed in detail in the next phase. The final site list must be approved by
the Operator and the engineering team. In addition, the site selection team must
carefully check site data and provide accurate input data for the detailed design of
a radio network.
Site searching
Obtain an initial site list from the preplanning result. Set a search scope on the map
based on the initial site locations. Determine several candidate sites and perform a
simulation evaluation. Determine the priorities of the candidate sites according to
the simulated coverage performance and interference situation. If no candidate
sites can be determined, Huawei proposes a feasible solution to the Operator for
future discussion.
RF site survey
Carefully survey the candidate sites with determined priorities to decide the
feasibility of site construction. Successful site acquisition requires rich experience
and in-depth understanding. In addition, you must pay special attention to the local
electromagnetic background to work out a preliminary solution to the co-site
antenna system, isolation, transmission, and power supply. Finally, you need to
submit a survey report to the Operator. The report must contain radio environment
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photos around the sites, and relevant information about concrete obstacles in the
coverage areas and antenna installation locations.
Site evaluation
After the site survey, you need to determine the optimal candidate sites that can
achieve the planned coverage target. First, evaluate the candidate sites based on the
survey result. Then use Huawei Genex tool to perform a simulation evaluation. If
none of the candidate sites can meet the requirements, perform a new site search
within the search scope until the requirements are met. Before the simulation,
verify the validity and accuracy of the digital map. You must use a calibrated
propagation model or a similar one for site evaluation to ensure that the selected
sites can meet the requirements in the planning.
For co-site with GSM or UMTS site, they may not suitable for deploying an actual
site caused by roof space and antenna isolation etc. limited. Huawei will do a
detailed survey in field and not need do the above task of site searching, and
produce report which presents the roof space, antenna isolation and coverage
prediction by simulation to Operator.
3. Deliverables
Table 3-4 GU Site Planning Deliverables
Item
Activities
Content

1
Report of RF
Site Survey




2
Report of Site
Selection


Remark
The wireless environment picture
around the site
The detailed obstacle of coverage
area
The coverage area description
Preliminary RF configuration design
Candidate site list
Simulation of candidate sites/Site
evaluation
Final accepted site list and
preliminary RF configuration
The contents could be
changed according to
different projects and
different contracts.
The contents could be
changed according to
different projects and
different contracts.
3.2.3 Buffer Zone Planning
1. Input

Engineering parameter

The propagation model has been tuned or agreement on similar model from
propagation model library.
2. Service Description
After refarming, GSM frequency resources are significantly reduced to deploy
U900. If the refarming is implemented not in entire network, it will bring
co-channel interference between refarmed area and un-refarmed area, and it cannot
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be eliminated through filtering. Thus, during refarming, buffer zones need to be
temporary defined to isolate the interference between U900 and G900.
Buffer zone planning means maintain a guard band through geographic isolation to
limited and mitigating co-channel interference, and reduce the risk of radio
network performance degradation after refarming. This buffer zone planning is
depicted in Figure2:
Figure 3-2 GU buffer zone area
The interferences that shall be considered by coverage prediction for buffer zones
planning are listed as below:

Interference generated by U900 NodeB to G900 MS

Interference generated by U900 UE to G900 BTS

Interference generated by G900 BTS to U900 UE

Interference generated by G900 MS to UMTS NodeBs
The buffer zone will be planned based on GSM site which have been impact on the
same frequency through joint coverage prediction between GSM and UMTS. This
method is applied to the early period of buffer zone planning.
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Legend
START
Huawei
001
Operator
Preparing Data for
Coverage Simulation
Huawei &
Operator
002
NOC
Predicting UMTS
Coverage
003
Predicting GSM
Coverage
004
Calculating Buffer Zone
Doc-Out-001
END
3. Deliverables
Table 3-5 Buffer Zone Planning Deliverables
Item
Activities
1
Buffer Zone
Planning
Report
Content
Remark

The contents could be
changed according to
different projects and
different contracts.
Buffer zone site list
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3.2.4 GSM Intelligent Frequency Optimization
After traffic migration and GSM configuration offload, the frequency used to
deploy U900 can be clean out through frequency redesign. GSM intelligent
frequency optimization is to perform frequency redesign for the entire network by
generating interference matrixes based on the MR data of the subscribers in the
existing network.
Because the GSM spectrum is decreased after refarming, certainty the interference
within the network will increase. In order to ensure frequency redesign quality and
reduce influences of existing network performance, Huawei advice to do RF
optimization to control the interference before frequency redesign.
1. Input


Network information collection, including:
−
Customer and contract requirement
−
Customer network development requirement
−
Frequency planning principle in the contract
−
Network structure information
−
Engineering parameter table
−
Digital maps
Network data collection, including:
−
Data configuration
−
Traffic statistics
−
DT/CQT data
2. Service Description
Intelligent Frequency Optimization Principle
GSM handsets can measure the frequencies in the serving cell’s BA2 table in the
dedicate mode, and it is used for the frequency re-planning based on MR. The
difference of the RX_Level between the serving cell and neighboring cells are
calculated during the subscriber’s call process. The relationship between a pair of
cells can be evaluated by a great deal of the MR statistics, which is gained by
counting all RX_Level difference between serving cell and each neighboring cell.
The interference matrix can be generated by supposing each associate two cells
have the same BCCH, and estimating the interference of all the pairs of cells in the
network. Finally, the co-channel and adjacent-channel can be distributed to the pair
of cells which shows low interference probability in the interference matrix. This
can minimize the amount of interference in the network.
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Figure 3-3 Principle for Intelligent Frequency Optimization based on MR
Intelligent Frequency Optimization Workflow
The following workflow will describe one useful standard workflow for GSM
radio network frequency optimization service.
The following flow chat demonstrates how Huawei conducts frequency redesign,
which is standard operation workflow and has been performed by projects Huawei
delivered worldwide. Huawei shall consider Operator acknowledge the process
and provide necessary support to proceed frequency redesign.
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START
B
001
Collect Basic Network
Data
009
A
Load Data Script
002
Troubleshoot Alarm
011
010
Data Loading
Successful?
003
RF Optimization
Roll Back
Doc-Out-001
Y
RD
013
012
004
KPI Accept
Successful?
Collect MR Data For
Frequency Redesign
Optimize Frequency
Y
A
014
RD
005
Service Acceptance
Redesign Frequency
RD
Doc-Out-003
Doc-Out-002
006
END
Predict Gain
Legend
007
Review & Approve
Frequency Redesign
Result
Huawei
Operator
008
Huawei &
Operator
Prepare Loading Plan
NOC
B
The table below includes, but not limited to main activities during the entire
process of frequency redesign.
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Table 3-6 Main Activities for Intelligent Frequency Optimization
No.
Task
Sub-task
1.Existing OSS/BSS/CN networking diagram
2. Existing OSS/BSS software version & specific feature
1
Collect Basic
Network
Information
3. 2G Traffic Statistics of entire network
4. Existing frequency redesign schema & data
5. Existing Cell planning information (location, height, azimuth, tilt, TRX,
hopping mode, etc.)
6.Interferance simulation prediction based on bandwidth of 7.5Mhz & 5Mhz
1.BCCH/BSIC check or adjustment
2. Neighbor list check or adjustment
2
RF
Optimization
3.Coverage overshooting check or adjustment
4.Hardware configuration check if applicable
5. Register refarming related task on OSS/BSC in advance for verification
3
Collect MR
Data For
Frequency
Redesign
1. Freeze network forbidding network operation for a week to start MR
collection
2.Upload MR data to GNAC
1.Make frequency scheme by IFOS both for Huawei and Nokia network
4
Intelligent
Frequency
Optimization
2. Review and modify generated frequency redesign
3. Make the data script of Huawei BSS
4. Make the data script of Nokia BSS
3. Deliverables
Table 3-7 GSM Intelligent Frequency Optimization Deliverables
Item
Deliverables
1
Intelligent
Frequency
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Contents

Remark
Frequency resource
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Optimization Report

Frequency
strategy
redesign

Frequency redesign result

BSCI redesign result
and different contracts.

Comparison between old
frequency plan and new
frequency redesign
3.2.5 GSM&U900&U2100 Inter-RAT Operation
Design
For Operator network, three different strategies/scenarios for managing different
layers will be introduced based on morphology and available frequency. Service
steering will be used in some scenarios to optimize the network performance.
1. Input

Existing Network information

Refarming solution report
2. Service Description
Scenario 1: CBD – Where the majority of UMTS2100 sites will be using F3 &
F4
In this scenario there will be 4 access layers: GSM900, GSM1800, UMTS2100
F1&F2. UMTS900 will be introduced as Coverage layer and UMTS2100 F3&F4
are Capacity layers.
UE and network behavior towards the multilayer management will be as follows:

UEs will camp on UMTS2100 F1 and F2 in idle mode (i.e. Access Layer).
These 2 layers will also be the preferred layer for R99 (CS + PS).

F3 and F4 will be the Non-Access and HS-preferred layers – UEs will be
service-steered to these 2 layers for HS services (if the layers are not loaded).

UMTS900 layer will be considered as the coverage layer – only way for UE
to go to this layer from all UMTS2100 layers is due to coverage problem in
UMTS2100 band (Coverage-based IFHO/ISHO).

Re-selections to the GSM1800 layer are only possible via the GSM900 layer.

PUC (Potential User Control) feature will be used to balance the load
between F1 and F2 through idle mode re-selection.

Calls terminated on UMTS900 and UMTS2100 F3/4 will be forced to
re-select to access layers immediately.

Combined services will stay at the cell, from which UE accessed the network
(e.g. UMTS2100 F1 or F2).

Bi-directional LDR (Load Re-shuffling) and RAB DRD (Directed Retry
Decision) will be permitted among all UMTS2100 layers.
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LDR from all 3G layers to GSM900 will be permitted (as the last option for
LDR).
Figure below demonstrated this layer strategy:
Figure 3-4 Multilayer strategy for CBD
Scenario 2: Urban/Suburban – Where the majority of UMTS2100 sites will be
using F1 & F2 (also F3 where available)
In this scenario there will be 3 access layers: GSM900, GSM1800 and UMTS2100
F1. UMTS900 will be introduced as Coverage layer and UMTS2100 F2 (and F3 in
areas where it’s available) is Capacity layers. UE and network behavior towards
the multilayer management will be as follows:

In UMTS2100, only F1 layer will be the Access Layer (as well as R99
CS+PS preferred).

F2 (and if available, F3) will be the Non-Access and HS-preferred layers (i.e.
Service Steering enabled).

UMTS900 layer will be considered as the coverage layer – only way for UE
to go to this layer from all UMTS2100layers is due to coverage problem in
UMTS2100band (Coverage-based IFHO/ISHO).

Re-selections to the GSM1800 layer is only possible via the GSM900 layer.

Calls terminated on UMTS900 and UMTS2100 F2 (and F3 if available), will
be forced to re-select to access layers immediately.
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
Combined services will stay at the cell, from which UE accessed the network
(e.g. UMTS2100 F1 or F2).

Due to inconsistency in the presence of UMTS2100 F3, due to coverage
restrictions for F3, Coverage-based IFHO from UMTS2100 F3 to UMTS2100
F1 or F2 is permitted.

Bi-directional LDR (Load Re-shuffling) and RAB DRD (Directed Retry
Decision) will be possible between U2100 F1 and F2.

Uni-directional LDR and RAB DRD will be enabled for F1/F2 to F3 layer (if
F3 layer is available).

LDR from all 3G layers to GSM900 will be permitted (as the last option for
LDR).
Figure below demonstrated this layer strategy:
Figure 3-5 Multilayer strategy for Urban/Suburban areas
Scenario 3: Suburban – Where the majority of UMTS2100 sites will be using
F1 only.
In this scenario there will be 4 access layers: GSM900, GSM1800, UMTS900 and
UMTS2100 F1. UE and network behaviour towards the multilayer management
will be as follows:
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
Both the U900 and U2100 F1 layer will be Access Layers as well as GSM900
and GSM1800.

Re-selections to the GSM1800 layer is only possible via the GSM900 layer.

Calls terminated on UMTS900 layer will only re-select to U2100 F1 only if
UMTS900 coverage quality is poor (i.e. low Ec/Io) or when UMTS2100 F1 is
less loaded than U900.

Combined services will stay at the cell, from which UE accessed the network
(e.g. UMTS2100 F1 or UMTS900).

Uni-directional Load Balancing (i.e. LDR and RAB DRD) will be enabled
from U2100 F1 to U900.

LDR from all 3G layers to GSM900 will be permitted (as the last option for
LDR).
Figure below demonstrated this layer strategy:
Figure 3-6 Multilayer strategy for Rural areas
Some important notes regarding multilayer strategy are detailed below:

When a suburban cluster begins to have F3 deployed in majority of the sites
(e.g. More than 75%), layering strategy should be changed from Scenario 2 to
1, so the number of HS users will be balanced amongst 2 layers, and the
maximum number of HS users will be pushed to F3 (capacity layer and HS
preferred). Similarly, when a rural cluster has F2 deployed in majority of the
sites, layering strategy should be changed from Scenario 3 to 2.
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
In all the scenarios, LDR and DRD are carried out based on Blind Handover,
which is only recommended when the blind handover target layer has the
same or larger coverage footprint than the current layer that the UE is on.
3. Deliverables
Table 3-8 Inter-RAT Operation Planning Deliverables
Item
1
Activities
Content
Inter-operability
Planning Report

Remark
GSM900/UMTS900/GSM1800/UMT
S2100 inter-operability strategies
The contents could be
changed according to
different projects and
different contracts.
3.2.6 U900 Cell Parameter Design
1. Input

Planning KPI target from nominal plan. The planning target usually have
items below:
−
RSCP requirement
−
Ec/Io requirement
−
Pilot pollution ratio threshold
−
Cell UL load threshold
−
Cell DL load threshold

Final Accepted Site List

Site RF Survey Report

2G / 3G neighbor list

The Propagation Model has been tuned or agreement on similar model from
propagation model library.

Mobility, service, terminal and user behavior model from customer

Digital map
2. Service Description
After the final site list was approved by Operator, we can design the UMTS900
cell parameter. The radio network detailed design is very important, the quality of
detail design will affect the KPI acceptance and devoted resource of initial tuning,
so this service should be imperative in Huawei service package. The
comprehensive analysis should be approved by customer, and the report should be
approved by the customer also.
The Radio Network Design service provides a complete radio design solution for a
new UMTS radio network and/or site expansion, including the RF configuration
and cell parameter design. Since in the UMTS radio network, power is the
common resource, Huawei Radio Network Design service will assure efficient use
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of the flexibility between coverage and capacity providing mixed service design
(voice, circuit and packet data) according to the Operator requirements.
RF configuration design
According to the selected sites and updated survey information, adjust the
simulation result of the preplanned network. In addition, according to coverage
requirements perform a new evaluation, adjustment, and optimization for the areas
with poor coverage or pilot pollution. You may also need to accordingly adjust the
antenna related configurations (such as the antenna type, azimuth, downtilt angle,
and altitude) for new sites and output power of the concerned NodeB so as to
better meet the coverage requirements of a radio network.
After all the detailed design parameters of RF configuration are finally determined,
update the site database. The coverage and interference prediction results outputted
during simulation serve as references for the design of scrambling codes and
neighboring cells.
Cell parameter design
The cell parameter design includes the RNC area design, paging area
(LAC/RAC/SAC) design, scrambling code design, neighboring cell design,
performance parameter and power design.

RNC Area Design
The RNC area design is to plan the number of RNCs in the coverage range, the
number of cells under an RNC and its coverage range.

Paging Area Design
Paging area design concerns LA/RA/URA configuration, it also plans the page
type 1 capacity of whole network. If Operator with a 2G network wants the 2G
network and the 3G network to supplement each other, or the Operator wants the
two networks to share load or wants subscribers can hand over from the two
networks, the LA and RA configuration must be consistent or in special
consideration.

Scrambling Code Design
A scrambling code design is produced, which details the code group planning as
well as prediction of Orthogonal Variable Spreading Factor (OVSF) utilization, i.e.,
defining the number of scrambling codes for each cell and the code re-use factor.

Neighbor Relation Design
Define the neighbor relations. Both the Intra RAT neighbors and the Inter RAT
neighbors should be considered. Designing should be performed in the planning
tool, to minimize the pilot pollution when cell parameter data is implemented in
the real network.

Performance Parameter Design
The performance parameters design includes the service differentiation policy, user
camp-on policy, mobility management policy, load control policy and relevant
algorithms. Also includes Inter-RAT hangover and cell reselection policy. The
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performance parameter design must be based on the parameter configuration
baseline of Huawei.

Power Design
In the UMTS radio network, coverage and capacity are closely tied and power is
their common resource. The power designing will ensure optimal use of the
flexibility between coverage and capacity to provide high quality of service and
fast network deployment. As HSPA and HSPA+ may utilize a large portion of the
unused power, the interference floor may increase. This rise in interference shall be
part of the power design.
Power and coverage design will insure optimal number of sites, especially in rural
areas or road coverage areas, as coverage can be extended up to 80 km and 200 km.
In addition, the UE access signal strength level is improved which allows for better
accessibility, better indoor coverage, and less sites.
After verifying design results with the Operator, output standard planning tables
for the engineering team to generate and execute scripts.
3. Deliverables
Table 3-9 U900 Cell Parameter Planning Deliverables
Item
1
2
3
Activities
Engineering
Parameter
UMTS Cell
Parameter
Database
UMTS Radio
Network
Detailed
Design Report
Content
Remark

Site numbers

Site coordinates

Antenna type

Azimuth

Down tilt

Cell channel power

RNC area

LAC,RAC,SAC

Neighbor list

PSC code

Performance parameter different with
baseline

Sites address distribution geography
display

Sites address detail description

Suggestion for Antenna feeder type
selection

Simulation result evaluation
2017-05-03
The contents could be
changed according to
different projects and
different contracts.
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The contents could be
changed according to
different projects and
different contracts.
The contents could be
changed according to
different projects and
different contracts.
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3.3 GSM&U900 Rollout
The new GSM and UMTS site should be deployed based on design result after
refarming solution design. In some scenarios Operator will do refarming on part
area, at this time you must plan buffer zone to avoid the co-channel interference.
Huawei suggest making frequency redesign in the buffer zone area and deploying
U900 area, thus to assure the quality of the whole network after frequency
redesign. In additional, different deployment strategy should be applied in different
application scenarios.

Extend 3G Coverage in Sub-urban & Rural
On this scenario, refarming should be deploying step by step usually, buffer
zone planning is needed. Because the traffic in urban is higher, interference
should be noticed when planning buffer zone on the board between urban and
suburb. In additional, because of the high base station existing in the
Sub-urban or Rural area, the interference range should be control during the
refarming process.

Improve 3G Coverage in Urban Area
If the refarming deploy on the dense urban area first, because the more same
frequency protected sites need to clear out, it is senseless to plan buffer zone.
Huawei suggest refarming in whole area and not plan buffer zone in urban
area.

Initial 3G Rollout in All Areas
There is no co-channel interference on this scenario and buffer zone planning
is not needed. The spectrum which deploys U900 can be clean out one time to
redesign frequency.
General, more and more refarming project will parallel with swap. In order to
minimize the performance degradation caused by project implementation at the
same time, it’s not recommended for refarming during swap. If refarming before /
after swap, each step of network operation is measurable, few risk for the network
performance.
Strategies
Refarming
swap
after
Advantage
Disadvantage
Each step of network operation is The refarming quality will be impacted by
measurable, few risk for the the cluster swap progress and quality
network performance
Each step of network operation is The quality of third part frequency redesign
Refarming before
measurable, few risk for the may be impacted due to situation
swap
network performance
uncontrolled by Huawei
Refarming during
swap
Few steps for network operation
2017-05-03
The root cause of network issue is hard to
be distinguished, high risk for network
performance
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3.3.1 Expansion&Overbuild
1. Input

Refarming solution report

Traffic migration report
2. Service Description
Traffic migration may be need toward to G1800 or U2100. In case G1800
coverage is not continuous or current G1800 and U2100 coverage or capacity can’t
bear the traffic migrated from G900, the expansion or overbuild is needed. It
includes expansion TRX number and carriers, PDCP channel number and new site
added. Considering congestion rate, prepare 20% redundancy TRXs for G1800 is
recommended.
3. Deliverables
Table 3-10 Expansion & Overbuild Deliverables
Item
Activities
1
Expansion &
Overbuild
Content
Remark

Expansion TRX number and carrier

PDCP channel number

New co-sites list
The contents could be
changed according to
different projects and
different contracts.
3.3.2 GSM Traffic Migration
1. Input

Refarming solution design report

AMR proportion rate

TCH traffic busy threshold

AMR TCH/H prior cell load threshold

Busy half rate percentage of every cell
2. Service Description
The effect of traffic migration decides the performance of GSM network. It is the
most important key factor guarantee the success of Refarming. On the premise that
agreement mutually with refarming solution design, Huawei will design detailed
traffic migration solution. Mainly include following steps:
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Maximum
Configuration
Planning for G900
Design AMR-HR
Proportion
Design
Migration
Traffic Value
Expansion /
Performance
Design
Overbuild
&
Monitoring &
Migration
Implementation
GSM Offload
Parameter
G900 Maximum Configuration Design
GSM900 offload design include keeping or degrading frequency reuse pattern, the
difference lies on as following table described. The maximum configuration should
be design according to the performance requirement of Operator. The
configuration offload is needed when the cell maximal configuration exceed
planned value.
Table 3-11 Advantage and Disadvantage of Frequency Reuse after Refarming
Frequency Reuse
Advantage
Disadvantage
Keep frequency reuse
mode
on
current
network.
Ensure
the
performance
unchangeable after GSM offload
Couldn’t support former traffic
after
reducing
frequency
resource, a mass of traffic need
to be migrated.
Reduce frequency reuse
mode
of
current
network
Reduce TRX number in reason
Tighter frequency reuse must
be adopted and GSM network
performance will be degraded.
Design G900 Half Rate Promoting Rate
After G900 offloading, promote G900 half rate proportion to bear traffic capacity
is needed. Promoting G900 half rate proportion will result in GSM network quality
deterioration, AMR half rate affect the network quality little, so we advice to
promote AMR half rate proportion mode. If Operator don’t buy AMR half rate
license, the GSM half rate promote mode should be selected, it will affect GSM
voice quality.
Design Traffic Migration Value
It is based on some prerequisite to calculate G900 traffic migration, if Operator
could not provide the congestion rate, terminal proportion and half rate proportion
and so on; Huawei will give recommendation value base on Huawei abundant
experience.
Design Traffic Migration Parameter
Traffic load balance parameters mainly aim at G1800/U2100, if G1800 network
distributing is discontinuous or Operator haven't U2100 network, traffic migration
within G900 as the supplementary means or by cell splitting, building new site and
controlling coverage to promote network capability. After G900 offload and
G1800 expansion, we should design correlative handover and reselection
parameters to achieve traffic load balance.
Performance Monitoring & G900 Offload
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Traffic migration including CS and PS service, after implementation traffic
migration parameters, contrast per line traffic erl, throughput rate and network KPI,
evaluation the effect around traffic migration, if the effect is not as expected, need
to tune and optimize to achieve its goal.
Because the U900 and G900 were not been commissioned synchronously,
besides some G900 cell occupy some U900 spectrum before commission U900
sites to avoid congestion, when U900 sites have been commissioned, need to close
related G900 frequency that have occupied U900 frequency.
3. Deliverables
Table 3-12 GSM Traffic Migration Deliverables
Item
Activities
1
Traffic
Migration
Report
Content
Remark

Needed offload cell list and TRX list

Traffic load balance parameters

Monitor report around migration
The contents could be
changed according to
different projects and
different contracts.
3.3.3 U900 Data Configuration & Script Execution
After finishing traffic migration and frequency redesign on GSM network, we can
monitor performance and do RF optimization. When the acceptance requirement is
achieved, we can start GSM network acceptance, afterwards U900 network will be
deployed.
Huawei RAN engineer will do Site Integration & RNC Commissioning, and
implement planning script data and launch new site. The initial tuning will be
implemented after the new sites on air.
3.4 Optimization
3.4.1 GSM RF Optimization
1. Input

Network Evaluation Report

Refarming Solution Design Report

Buffer Zone Planning Report

Frequency Redesign Report

Engineering parameter

Maps
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2. Service Description
During deploying U900, in order to save construction costs, the feeder and antenna
maybe need to be reused and co-antenna deployed. After traffic migration and
frequency redesign, network coverage, capacity and interference will change, to
ensure network performance on best condition RF tuning is needed.
In the situation of refarming not deploy the entire network, we need planning
buffer zone outside the UMTS900 sites area, and do RF optimization for the
intra-frequency GSM sites outside the buffer zone to prevent cross coverage to
avoid GU co-channel interference.
Before Refarming, cross coverage may exist in the network. Since frequency
resources are sufficient, the cross coverage does not cause serious interference.
After Refarming 5MHz, tight frequency reuse highlights the interference in the
cross-coverage area. So, the RF optimization should be considered before and after
refarming.
The RF optimization includes overshooting coverage optimization, intra-frequency
interference optimization, co-BCCH and co-BSIC optimization, neighboring cell
optimization, antenna azimuth and down tilt optimization etc.
3. Deliverables
Table 3-13 GSM RF Optimization Deliverables
Item
Deliverables
Contents
Remark

Redundant
Neighbor
Optimization List

1
RF
Optimization
Report
Co-BCCH
&
Optimization List
Relationship
Co-BSIC
Cell

BCCH Frequency Optimization List

Neighbor Relationship Optimization List

Cell Overshooting Optimization List

Network KPI comparison
The contents could be
changed according to
different projects and
different contracts.
3.4.2 UMTS Radio Network Initial Tuning
1. Input

Network Evaluation Report

Refarming Solution Design Report

Buffer Zone Planning Report

Engineering parameter

Maps
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2. Input
After the cell parameter design finished and load the existing network, we need
ensure that the coverage performance of radio network is satisfactory prior to
commercial launch, which mean is to ensure good quality for the end-users, so this
service should be imperative in Huawei service package.
According to the both agreed cluster division with customer, make detailed test
schedule, design test route, and update sites information. Using DT tool to record
radio air interface data, and save the log file, then analyse the network problem
such as coverage, handover and call drop, etc.
The most important items for log file analysis are as below:

Pilot coverage is very important to the radio network performance. According
to scanner’s measurement results to find out the coverage gap, week coverage,
over shooting and pilot pollution problem, etc. Tune and optimize the project
parameter such as azimuth, tilt and height to improve the coverage.

Interference will affect the voice quality or cause call drop if it is too high.
Down link and uplink interference problem should be analyzed during the RF
optimization phase to avoid the effect of the network performance.

Handover failure can cause the call drop. Handover area should be controlled
to improve the handover success rate. Missing and redundant neighbors
analysis also should be considered during the RF optimization phase.

The target of radio network design is to keep the service connection after the
access, so the coverage, accessibility, mobility, retainability and time delay
KPI for CS and PS services should match the design target after the
optimization.
During the radio network initial tuning, based on the above analysis result and
network real situation, provide short term and long term optimization proposal
including necessary radio parameter tuning and new sites addition, to improve the
radio network coverage and quality. Verification should be implemented after the
RF tuning to ensure the optimization was achieved and update the radio parameter
database.
More analysis and tuning should be executed if the DT KPI cannot be achieved
until the all the KPI fulfil acceptance criteria, then make the RF initial tuning
report and submit it to the customer for approval.
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3. Deliverables
Table 3-14 UMTS Radio Network Tuning Service Deliverables
Item
1
Description
Radio Network
Tuning Report
Content
Remark

Cluster definition

Drive Test routes definition

Drive Test KPIs result


Coverage plots
Throughput plots

Final Cluster RF database

Failure identification and analysis
Track of change proposal and
implementation
Change Request (CR)


The contents could be
changed according to
different projects and
different contracts.
3.4.3 GSM&U900&U2100 Inter-RAT Operation
Optimization
Because of sharing SDR modules in the scenario of Refarming, involved service
layered and Co-RRM arithmetic relating to load balance, traditional 2G/3G
inter-operability could not adapt to the scenario of GSM/U900/U2100 multi-carrier.
Considering optimizing deployed multi-mode and multi-layered network towards
some scenario about traffic migration, terminal proportion, smart terminal
popularization and increased mobile data business application is needed.
3.4.4 Non-standard Bandwidth New Feature
Introduction and Optimization (optional)
1. Input

New feature license
2. Service Description
Usually, the frequency bandwidth of UMTS must be 5MHz. With the development
of 3G service, the frequency resource is become more and more rare. The conflict
is evident on the high quality frequency band. Many operators can’t refarm 5MHz
for the limited frequency resource, but they want to deploy the new services on
850/900MHz for the competition pressure. Through algorithm enhancement,
Huawei can support frequency bandwidth less than 5MHz. The feature only can be
used in GU or UU co-site scenario.
However, KPI is impacted even with carefully network planning and optimization
when frequency bandwidth is less than 5MHz. The impact on the KPI can be
reduced with buffer zone planning, but it can’t get rid of the impact thoroughly.
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Thus, Huawei will provide the report which presents the impact after flexible
frequency bandwidth of UMTS carrier introduced to Operator, and Operator must
balance between the KPI and bandwidth utilization.
Due to the sensitivity of the KPIs when adopting this feature, Huawei recommends
to operators to use Huawei 's New Feature Introduction services to ensure accurate
setting and fine tuning of the different parameters in order to obtain the optimum
KPIs after new feature launched.
The following optional UMTS feature is recommend to be applied for reduce
interference to the UMTS after flexible frequency bandwidth of UMTS carrier
feature launched.

WRFD-020136 Anti-Interference Scheduling for HSUPA
3. Deliverables
Table 3-15 Non-standard Bandwidth New Feature Introduction Deliverables
Item
Activities
1
New Feature
Introduction
Report
Content



Remark
Performance impact from GSM to
UMTS
Feature Analysis
Feature Acceptance
The contents could be
changed according to
different projects and
different contracts.
3.4.5 GU Network Performance Assurance
1. Input

MR/PCHR/Performance data

Engineering parameter

Configuration Script

DT data
2. Service Description
During the implementation traffic migration and frequency optimization, network
performance maybe degrades or fluctuates. Therefore need to monitor network
performance, network load and VIP subscribers during frequency re-planning and
RF optimization. Do the troubleshooting in time to weaken the impact to current
network users. Meanwhile by routine parameter check, ensure parameter
consistency. It could isolate basic configuration problem fast avoid long time and
low efficiency optimization.
General in the refarming scenario, a certain U900 terminal proportion, that is
after re-farming some G900 subscribers will transfer to U900 network, thus after
sites on air, real-time performance safeguard will deploy to ensure subscribers
sensitivity no degrade.
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Professional tools include PRS etc. will help Huawei to understand current
network situation conveniently and timely. Through checking and monitor, find
related problems about performance and load and solve in time, avoid network
performance worsen.
When network traffic KPIs meets acceptance standards, submit acceptance request
to Operator.
However, if can not meet the criteria of acceptance KPIs still, then re-analysis,
suggestion and tuning will be done until meet the acceptance requirements. At the
end of the radio network performance assurance, produce report which presents
performance before and after refarming to Operator.
Radio Network Performance Monitoring
Radio network performance monitoring that means initiative to understand the
state of radio network performance and detect radio network performance issues
closely. Huawei will produce customized report which presents radio network
performance KPI before and after refarming to Operator.
Wireless Network Load Monitoring (optional)
Wireless network load monitoring that means monitor the traffic trends, resource
utilization rate and congestion in time. The resource includes RF and BSS resource.
Huawei will produce customized report which presents dynamic network load
before and after refarming to Operator.
VIP Monitoring (optional)
Base on the VIP subscribers, cells, area and route determined by operator, we need
to route monitor and analysis every day and week, find potential network risk,
initiative care for key subscribers, promote VIP subscribes perception to network
quality and output monitor report to operator .
Radio Network Routine Audit (optional)
Radio network routine audit that means find and exclude network performance
fluctuation caused by hardware fault and basic configuration problems, such as
alarm, antenna system problem, missing & redundancy neighbor, frequency
conflict and parameter configuration error etc. It will to ensure the radio network
status health.
Radio Network Performance Troubleshooting
Radio network performance troubleshooting that means solved the discoverable
network problems from the monitoring and routine audit. It includes the following
contents:

Collect related data of problem handling, including configuration data, alarm
data, traffic measurement data, PCHR data, single user tracing data, MR data,
and DT/CQT data.

Perform deep analysis on problems according to related data, including call
drop analysis, access analysis, handover analysis, coverage analysis, delay
analysis, throughput analysis, voice quality analysis, and interference
analysis.
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
According to analysis issues, necessary changes will be recommended
including engineering parameter and cell parameter to improve radio network
performance. When the changes have been implemented, perform a
verification test and analysis to ensure improvement is achieved with change
proposals, and then produce problem handling report which presents network
performance before and after refarming to Operator.
3. Deliverables
Table 3-16 UMTS Rollout and Optimization Deliverables
Item
Activities
Content


1
Report of
UMTS
Rollout and
optimization




Remark
New feature introduction
Buffer zone planning result
UMTS final site list
UMTS radio network initial tuning
result
UMTS network performance
assurance result
Acceptance KPI result
The contents could be
changed according to
different projects and
different contracts.
3.5 Acceptance
General during the Refarming process, GU network swapping, expansion or
network performance promoting are existing meanwhile. Related service solution
content needs to add in these cases. When these service content need to be
implemented under sorts of scenario, any operation will affect current network
performance. It is very difficult to determine question, to avoid network
performance drop and subscriber’s perception down, Huawei advice to avoid
refarming implementation with other solution at the same time.
KPI Acceptance
General, the acceptance process is divided into 2 key phases:
The purpose of the GSM KPI acceptance is to ensure that is an agreed KPI by all
parties after refarming. The network performance statistic KPIs is recommended
and drive testing KPI should be customized according to the demands of Operator.
The purpose of UMTS KPI acceptance is to ensure that is achieved target for
deploy U900 network. It includes network performance statistic and drive testing
KPI.
If the swap is parallel with refarming, the swap acceptance firstly and using OSS
counters to compare the pre-swap & post-swap network performance is
recommended to avoid influence each other. It shall be collected 4 weeks prior to
the network swap.
Network KPI Commitments
Huawei propose to use a weightage system to ensure that the optimization strategy
is focused on key KPI impacting user experience. In large-scale deployment,
there would be network variables influencing the network performance including
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traffic load variance, user behaviors, site configuration, transmission capacity and
terminal performance.
In principle, KPIs that critically impact the user experience shall carry more
weightage than other traffic related KPIs. Each KPI will have a value. However,
greater emphasis shall be placed on 3g.
Huawei propose to consider network acceptance based on 80% acceptance criteria.
An acceptance matrix has been proposed to priorities the optimization strategy to
meet these KPI, please refer to below:
Table 3-17 Network KPI Commitments
Technology
Weightage
Acceptance Criteria (80%)
2g
25%
20%
3g
75%
60%
Total
100%
80%
4
Project Implementation
This chapter presents key aspects surrounding project implementation in terms of
responsibility matrix, project plan, tools, and resources requirement.
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4.1 Organizational Structure
Huawei will provide qualified personnel needed to perform the services described
in this proposal. The term “qualified,” means that Huawei personnel will have the
skills to perform the services contracted from day one. Huawei will use its own
qualification/certification procedures, to ensure that personnel provided possess
the minimum skills required for the project. During Huawei’s performance of the
work, Huawei shall make its best effort to maintain continuity of personnel
assigned to the task and to perform the work as agreed.
Refarming Project
Technical
Director
Frequency
Redesign
Team
Network
Planning
Team
Network
Monitor
Team
Terminal Team
OSS Team
Core Team
Data
Design
Team
RAN Team
Solution Team
Simulation Team
HQ Support Team
On-Site Team
R&D Team
Network
Optimization
Team
Figure 4-1 Organizational Structure
The role description as follows
Table 4-1 Role Description
No.
Team
Responsibility
1
Solution Team
Delivery solution, schedule across different network element
Change management, technical clarification.
2
Frequency redesign
team
Define frequency design guideline, frequency data generation
3
Network planning
team
Database management, BSS HLD/LLD and Cell planning,
parameter design.
UMTS GU radio network swap solutionService Description
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4
Data design team
Scripts and data
5
Network Monitor
Team
Monitoring network alarm, performance, load and VIP etc. on
OSS, Support data modification and check during optimization.
Generate KPI report
5
Network
Optimization team
Network test, analysis of Drive test and traffic statistics , RF
Optimization, parameter optimization to reach expected KPI
6
R&D team
Roadmap of Huawei BSS software version, clarification of new
feature and its application. Perform network simulation in case
of needs.
4.2 Schedule
The estimated time duration for this service proposal is about [x weeks] in total
with the assumption of immediate kick-off and duration of refarming. The cost is
supposed to be changed if the assumption is deviant from the fact. [Put the time
line for the project]
 Note：
The schedule should be added according to bidding and discussed with Operator
4.3 Responsibility Matrix
The following table shows the responsibility matrix for GU900 refarming solution
assuming the [Phase 1 ***] Project.
Table 4-2 Responsibility Matrix of Refarming solution
No.
Task
Huawei
1
Provide network information for Refarming
Operator
R
(Spectrum, Terminal penetration, Traffic statistics,
Network topology, BSS/RAN parameter, site
configuration, etc.)
2
Traffic model analysis
R
R
3
Interference simulation and coverage prediction
R
S
4
Drive Test(Optional)
R
5
Spectrum reallocation mode design
R
6
Antenna system redesign for new site
R
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No.
Task
Huawei
7
Site access permit
8
Site survey
R
9
Site location planning
R
10
Site leasing
11
RF cell planning
12
BSS/RAN HLD and LLD
13
Network freezing to collect MR for frequency planning
14
New GSM900 frequency plan
R
15
Mobile Backhaul Network Evaluation and redesign
C
Operator
R
R
R
R
R
A
(if transmission network needs adjustment)
16
New GSM/UMTS network inter-operability strategy
R
17
BTS/NodeB Integration
R
18
BSS/RNC Commissioning
R
19
G1800 expansion and overbuild proposal
R
A
20
G900 offload proposal
R
A
21
On-site operation for TRX adjustment
22
Data configuration and script execution
23
Provide access permit for network operation
R
24
Coordination and Operation of non-Huawei system
R
25
GSM RF optimization
R
26
UMTS900 Initial Tuning
R
27
Antenna tuning
28
Network Inter-RAT operation optimization
R
29
Network performance issue troubleshooting
R
30
KPI report
R
31
Network benchmark test (if applicable)
R
32
Site acceptance
R
R
33
GSM KPI acceptance
R
R
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R
R
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No.
Task
34
For internal use only
Huawei
Operator
U900 KPI acceptance
R
R
35
Network acceptance(if applicable)
R
R
36
SIM Card for network verification
Note: S: Support,
R
R: Responsible A: Approval C: Conditional
 Note：
Responsibility matrix should be modified depend on the scope of work in preparation phase.
5
Huawei Experience
Huawei’s UMTS900 commercial deployment projects include: the Australia
OPTUS, Finland TeliaSonera, Romania Vodofone, France SFR, Thailand AIS
refarming, Venezuela DIGITEL, Belgium Mobistar and Hongkong Hutchison,
project etc.
Figure 5-1 Huawei Refarming Service Share
Lead the industry into refarming Era
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
No.1 Refarming market share (23 of 42 networks by 2010Q4)

11 commercial GSM&UMTS 900Mhz SDR network compliant with
ETSI standard by 2010Q4

World 1st GU SDR network with America Movil in LA

EU 1st GU SDR network with Teliasonera in Finland

World’s 1st GL 1800M SDR network with Aero2 in Poland

World’s 1st GL 900M SDR network with Net4Mobility in Sweden
6
2009-3-19
Conditions

Operator have obligation to assist Huawei complete this service, that
including but not limited offer necessary data and information of
Network for completing this service.

NDA should be the implementation of mutually agreement.

The acceptance shall be carried out in the defined situation. If there is
no feedback or objection from Operator within 10 working days after
the delivery of acceptance reports, it will be believed as approved
automatically.

If the radio network by Operator deployed has been commercial
launch, it will be believed as approved with acceptance automatically.

The obligation for Huawei of experience and knowledge transfer only
valid during the refarming lifecycle, begin from the refarming and
stopped 10 days after the acceptance report submission.

Customers can be implemented by the third party, but Huawei's point
of view is regarded as the same with customers. If customers requested
Huawei for coordination, it should be positioned as a Project
Management Services.

Huawei will not be held liable for the following:
−
Schedule delay due to situation uncontrolled by Huawei, such as
wicked weather, natural disaster and etc.
−
Operator’s late response or approval to Huawei’s proposal or
submission.
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
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−
Due to abnormal behaviors caused by system malfunction or mobile
terminal of the relevant problems is not solved within the service.
−
Antenna & site relocation due to regulations, property owners or
other non-Huawei reasons
−
Late delivery due to site acquisition and other non-Huawei reasons
−
Performance degradation due to no candidate sites available
according to design criteria even if some site is proposed as
compromise.
−
Faults or non-performance of 3rd party equipment (i.e. equipment
not included in vendor design/BOQ), facility or services i.e.
transmission solutions beyond the vendors control such as satellite
transmission, leased line/fiber, etc.
−
Faults attributable to any person un-authorized by the Huawei or
sites "taken off air" for example due to forceful acts of community,
local authorities, property owners, power suppliers, vandals, thieves,
etc.
The entire test item should be finished in one drive test time.
 Note：
The conditions must be reviewed and added according to different project and contract.
7
Acronyms and Abbreviations
Table 7-1 Acronyms and Abbreviations
Acronyms and abbreviations
Full Spelling
AMR
Adaptive Multiple Rate
ARFCN
Absolute RF Channel Number
BOQ
Bill of quantity
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BSC
Base Station Controller
BCCH
Broadcast Control CHannel
BSIC
Base Station Identification Code
BTS
Base Transceiver Station
CS
Circuit Switch
CAPEX
CAPital Expenditure
CQT
Call Quality Test
CBD
Central Business District
DT
Drive Test
DL
Downlink
DRD
Directed Retry Decision
DTX
Discontinuous Transmission
EGPRS
Enhanced General Packet Radio Service
HSPA
High-Speed Packet Access
HR
Half Rate
IFOS
Intelligent Frequency Optimization System
IFHO
Inter-frequency Handover
ISHO
Inter-system Handover
GSM
Global System for Mobile communications
GNAC
Global Network Analysis Central
KPIs
Key Performance Indicators
LAC
Location area code
LDR
Load Reshuffling
MR
Measurement Report
NDA
Nondisclosure agreements
OMC
Operation & Maintenance Center
OSS
operations support system
OPEX
Operation EXpenditure
PAC
Preliminary Acceptance
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PS
Packet Switch
RAN
Radio Access Network
RAB
Radio Access Bearer
RF
Radio Frequency
RND
Radio Network Design
RAN
Radio Access Network
RNC
Radio Network Control
RAC
Route area code
RSCP
Received Signal Code Power
SC
Scramble Code
USIM
Universal Subscriber Identity Module
UL
Uplink
UMTS
Universal Mobile Telecommunications System
VIP
Very Important
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