Upload
hungpm2013
View
106
Download
9
Embed Size (px)
DESCRIPTION
UTRAN Optimisation Process
Citation preview
NORTEL NETWORKS CONFIDENTIAL
June June 0022Arnaud PIAZZAArnaud PIAZZA
UMTS UMTS UTRAN Optimisation ProcessUTRAN Optimisation Process
Internal Use OnlyInternal Use Only
Presentation name - 2NORTEL NETWORKS CONFIDENTIAL
AgendaAgenda
• Introduction Introduction
• Pre-launch Optimisation process Pre-launch Optimisation process
• Monitoring&Optimisation processMonitoring&Optimisation process
• CostsCosts
• ImpactsImpacts
• ToolsTools
Presentation name - 3NORTEL NETWORKS CONFIDENTIAL
• Optimisation aims at improving the network performance and/or capacity.To improve the system initial performance
To reach acceptance criteria (=>payment)
To enhance the subscriber satisfaction
To increase the number of subscribers
To decrease CAPEX
• Methods may differ for : – Pre-launch optimisation (performed for acceptance, trials)– Post-launch monitoring and optimisation (performed for in-service
networks) Non loaded networks optimisation (for first product releases) Loaded networks (normally from product release 4)
IntroductionWhy optimising a network?Why optimising a network?
Pre-launch phasesPre-launch phases
Post-launch phasesPost-launch phases
Presentation name - 4NORTEL NETWORKS CONFIDENTIAL
IntroductionOptimisation phasesOptimisation phasesTr
ial
Tria
l
VOVO AcceptanceAcceptance Network Monitoring & OptimisationNetwork Monitoring & Optimisation
NetworkLaunch
Pre-launch Optimisation Post-launch Optimisation
No network load (traffic limited)
Cluster optimisation based mainly on drive tests data
High optimisation gains
Significant network load (increasing)
Optimisation based mainly on statistical data (counters, Call Trace)
Optimisation gain is less (but baseline performance are higher).
Presentation name - 5NORTEL NETWORKS CONFIDENTIAL
IntroductionOptimisation in GSM and in UMTSOptimisation in GSM and in UMTS
GSM Optimisation
Recommended parameter settings Repetitive drive-test campaigns (up
to 5) for Pre-launch optimisation
NetworkLaunch
UMTS Optimisation
Recommended parameter settings Single drive-test campaign for Pre-
launch optimisation
HighTraffic
System Parameters optimisation mainly
RF&System Parameters optimisation ND optimisation New features implementation Densification
RF Parameters Optimisation ND optimisation New features implementation Densification
“Services-Based” optimisation RF parameters optimisation mainly ATM parameters optimisation
Presentation name - 6NORTEL NETWORKS CONFIDENTIAL
Pre-launch optimisation processSteps teps descriptiondescription
Configuration AuditConfiguration Audit• System parameters check (Eng’g rules, consistencies,…)• Recommended values setting
Shakedown Shakedown • Network integrity verification• H/W trouble shooting
Cluster OptimisCluster Optimisationation• Parameters optimisation • neighbouring relationships optimisation
NetworkNetwork Optimis Optimisationation• Optimisation spreading to all clusters• Network fine tuning
Presentation name - 7NORTEL NETWORKS CONFIDENTIAL
Pre-launch optimisation process Configuration Configuration AuditAudit• Objective
– The objective of the configuration audit is to ensure proper system configuration and functioning in the integrated system.
• CheckingSystem parameters
• Database information consistency• Parameters coherence with Eng’g rules and recommandations
RF parameters• Spectrum Clearance (Noise floor measurements)• RF Design Information• Cell Database and Datafill (coordinates, # of antennas, antenna type, antenna tilt, …)
Transmission parameters• Datafill consistency between two linked networks elements
• Method – Database information collection and checks
Presentation name - 8NORTEL NETWORKS CONFIDENTIAL
• Objective – The objective of the cell shakedown is to ensure proper cell site operation in the
integrated system. Proper operation is verified through drive tests around the site and evaluation of antenna orientation, cable interconnecting and correct code assignments.
• Checking network access,call setupRRM algorithm settingshandoffs between cellsantenna orientationCarrier&code allocationpower levelsReception path
• Method – Drive tests at approximately 30 percent of the expected cell coverage area– Unloaded conditions
Pre-launch optimisation process Cell Cell ShakedownShakedown
Presentation name - 9NORTEL NETWORKS CONFIDENTIAL
• Objective – The objective of cluster optimisation is to perform RF design verification,
identify and categorize network or coverage problems, optimize for best performances according to the acceptance criteria and serve as a first pass of problem resolution.
• Analysis and Problem ResolutionNeighbor list optimizationCoverage problems (can include holes, failures due to multiple or rapidly
rising pilots)Network timer checking and tuning. Handoff parameters checking and tuning
• Method and requirements – Drive tests over the cluster– RF&Configuration audit and shakedown must be completed
Pre-launch optimisation process Cluster Cluster optimisationoptimisation
Presentation name - 10NORTEL NETWORKS CONFIDENTIAL
• Objective – The objective of system optimization (or control route analysis) is to
optimize the sum of all clusters covering an entire region.
• Method– The system performance optimization starts with two optimized clusters
and ends with all the clusters in the region.– Due to the cross-effects between clusters, handoff parameters, neighbor
list contents and neighbor prioritization might need changes at borders between clusters.
• Final deliverables - Performance Result Report - Performance Measurement Report - Test Environment Report - Issue list
Pre-launch optimisation process Network Network optimisationoptimisation
Presentation name - 11NORTEL NETWORKS CONFIDENTIAL
Pre-launch optimisation processOptimisation Optimisation timingtiming
Configuration AuditCell ShakedownCluster OptimisationPerformance data collectionReporting
Week N+1 Week N+2 Week N+3
Depends on the number of sites
Week N-1Week N-2 Week N
Presentation name - 12NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processSteps teps descriptiondescription
Different process according to the level of services : Level 3 : Advanced services
• Network optimisation• Growth planning• End-user services planning
Level 2 : Performance engineering services • Network monitoring • Network fine tuning
Level 1 : Operational support services• Emergency technical assistance service• Network expansion• First line operations
Presentation name - 13NORTEL NETWORKS CONFIDENTIAL
OptimisationOptimisation• Network performance improvment• NEs detailed performance&capacity analysis
Monitoring&Optimisation processSteps teps descriptiondescription
MonitoringMonitoring• Network audit • Performance fine tuning• Issues trouble shooting
Parameters auditMobility AnalysisCapacity Analysis
Voice quality Analysis
RF Analysis
Data quality Analysis
Quality Analysis
End user services planning Parameters optimisation
Code planningLoad balancing
RF Optimisation Growth planning
Presentation name - 14NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processMonitoring Monitoring (1/4)(1/4)
• Quality / Capacity Analysis – Objective :
measure and report on the Quality of Service / Capacity of the network or of some network elements => provide a complete set of metrics representing the perception of the users of the network.
trouble shoot/fine tune network performance.– Method : Use of Counter/Call trace data => computation of performance metrics.– Benefit :
settle performance issues and improve network quality/capacity, reporting of the network behavior => those data are key inputs for optimisation
actions.
• RF Analysis– Objective :
Evaluate the RF quality of the network or for some particular locations/NEs. trouble shoot RF related issues.
– Method : Use of Counter/Call trace data or drive tests data.– Benefit : settle local RF issues (pilot pollution, missing neighbours,…).
Presentation name - 15NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processMonitoring Monitoring (2/4)(2/4)
• Mobility Analysis – Objective : measure and report on the mobility profile of subscribers. – Method : Use of Counter/Call trace data.– Benefit :
Identification partitioning issues, fine tuning of network partitioning (RNC, LAC, ...boundaries).
reporting of the subscribers behavior => subscriber profile is a key input for network capacity dimensioning and traffic growth forecast.
• Parameters Audit– Objective :
Check the parameters setting consistency, Check setting coherence with Eng’g rules/recommendations.
– Method : Use of MIB extracts.– Benefit :
Identification and trouble shooting of network issues, System parameters setting « cleaning ».
Presentation name - 16NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processMonitoring Monitoring (3/4)(3/4)
• Data Quality Analysis – Objective :
measure and report on the data services quality (troughput mainly) => provide a complete set of metrics representing the perception of the users of the network.
trouble shoot or fine tune.– Method : Use of Counter/Call trace data => computation of performance metrics.– Benefit : Solve data quality (throughput,…) issues,
• Voice Quality Analysis– Objective :
measure and report on the voice quality on the network => provide a complete set of metrics representing the perception of the users of the network.
trouble shoot or fine tune.– Method : Use of VQ drive tests data.– Benefit : Identification and trouble shooting of voice quality issues.
Presentation name - 17NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processMonitoring Monitoring (4/4)(4/4)
• Transmission Analysis – Objective :
measure and report on the transmission quality (congestion, buffers size,...) => apply to the ATM transmission network, E1,...
trouble shoot or fine tune.– Method : Use of Counter/Call trace data => computation of performance metrics.– Benefit : Solve quality and reliability issues,
Presentation name - 18NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processOptimisation (1/4)Optimisation (1/4)
• RF Optimisation – Objective :
Reach the optimal configuration of each cell site in the wireless network (height, tilt, EIRP, orientation, antenna type, etc.)
Maximizes RF QoS (coverage improvement, interference reduction, neighbouring list optimisation) and capacity of the network.
– Method : Use of Call trace data and drive test. – Benefit : Better RF quality and capacity.
• Parameters Optimisation– Objective :
Set system parameters in order to reach optimal network performance. Adapt TCP and RLC parameters to optimise data connection performances.
– Method : Use of Call trace, protocol analyzer and drive test data. – Benefit : Better system performance.
Presentation name - 19NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processOptimisation (2/4)Optimisation (2/4)• End User Services Planning
– Objective : Evaluate the impact of new service introduction on the quality and capacity of the network.
– Method : Use of Counter/Call trace data to compute previsions.– Benefit :
Necessary to plan system optimisation and/or network design actions. Give the customer a clear view of new service impact and help planning
precisely for future growth.
• Growth Planning– Objective :
Forecast network growth, Determine network capacity limits and bottlenecks.
– Method : Use of Counter/Call trace data to compute traffic, load forecasts.– Benefit : minimize the future infrastructure needs of the operator through
precision engineering and use of just-in-time concepts.
Presentation name - 20NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processOptimisation (3/4)Optimisation (3/4)
• Load Balancing – Objective : Balance the load between different network elements (may be MSCs,
RNCs, ...) or between NE’s ressources (RNC cards,...).– Method : Use of call trace, counters and drive tests data to optimise the network
partitionning (LACs, number of cells per RNC,...) – Benefit : Improve load distribution over the different NEs or over the different
NE’s ressources.
• Code Planning– Objective : find an optimal scrambling code plan taking into consideration (actual
cell sites positions, inteferences, jammers, etc ...) and the real time data (radio measurements, counters, etc ...).
– Method : Use of call trace, counters and drive tests data.– Benefit :
Improve call quality, Improve capacity.
Presentation name - 21NORTEL NETWORKS CONFIDENTIAL
Monitoring &Optimisation processOptimisation (4/4)Optimisation (4/4)
• Transmission Optimisation – Objective :
Reach the optimal configuration and settings to maximize the transmission network reliability, performance and capacity.
– Method : Use of counters, Call trace and protocol analyser data. – Benefit : Better UTRAN performance in terms of both quality and capacity.
Presentation name - 22NORTEL NETWORKS CONFIDENTIAL
Costs Pre-Launch teamPre-Launch team
• The Regional RF Manager control the Pre-launch Optimisation operations for the region.
• The Drive-Test team is composed by one Operator (technician) and one Driver (local people) and is managed by the RF Optimisation Engineer.
The Operator runs data collection, controls drive test equipment and is in charge of downloading and post-processing the resulting data.
The RF Optimisation engineer analyses data from each drive tests and make change recommendations. He usually manages 2 drive-test teams: briefing/debriefing, advice for issue solving, eventual real-time analysis with the drive test team on-site.
• Additional ressources should be available for : call trace operator at the switch (one OMC technician).
datafill changes and configuration audit (one OMC technician).
RF Manager
RegionalRF Manager
RegionalRF Manager
RegionalRF Manager
RF Optim Engineer
Drive test team:- technician- driver
Drive test team:- technician- driver
RF Optim Engineer
Drive test team:- technician- driver
Drive test team:- technician- driver
Presentation name - 23NORTEL NETWORKS CONFIDENTIAL
Let’s assume a network made up of 1000 sites, to be optimised in 3 months
This campaign requires about 11 drive test teams with the related RF engineers and RF managers teams.
Considering drive test tasks are outsourced to managed services, the costs related to ressources would be approximately US$ 1.2M
Tool sets for all teams would cost approximately US$ 300K
Total costs would be Total costs would be ~ US$ 1.5M~ US$ 1.5M
Costs Pre-Launch operationsPre-Launch operations
RF Manager
RegionalRF Manager
RegionalRF Manager
RegionalRF Manager
RF Optim Engineer
Drive test team:- technician- driver
Drive test team:- technician- driver
RF Optim Engineer
Drive test team:- technician- driver
Drive test team:- technician- driver
Presentation name - 24NORTEL NETWORKS CONFIDENTIAL
Efficient optimisation process leads to good system performance and therefore customer satisfaction
good opportunity for potential extension, good opportunity for other networks implementation.
For Turn-key networks, optimisation helps reaching the predicted design => no need to « offer » additional equipments to reach targets.
Lack of optimisation and/or unefficient optimisation leads to poor system performance and
risk of delayed or failed network acceptance. Penalties example : XferaXfera: if network performance acceptance fail, US$ 200M. mmO2mmO2: 10% withholding on equipment costs until network performances are met. OniwayOniway: no payment before fully accepted network.
ImpactsImpact of optimisation Impact of optimisation
Presentation name - 25NORTEL NETWORKS CONFIDENTIAL
ImpactsImpact of optimisation feature shortageImpact of optimisation feature shortage
2002(early
deploy)
2003+(capacity/expansion)
Counters/Call Trace - lack of traffic volume counters (inhibits capacity assessment, expansion planning, call model feedback) Med High - lack of well defined call drop counter Low High - lack of fine granularity per-call power trace (inhibits RF capacity assessment, call drop troubleshooting) High Med - lack of CTg (Call Trace "geographic") Med HighConfiguration - Datafill Audit: lack of single "1 row per cell, 1 column per parameter" view across all per-cell parameters. High Low - many parameters require equipment restart to change values (inhibits quick changes for new settings) High HighPerformance - handoff link addition time too long (high FER, call drops) High High - lack of event-based measurement reporting (periodic measurements further delay the handoff process) Med High - lack of implementation of some of the performance enhancing "tricks" found on IS95 (power boosts, quick repeat of certain key messages)
Med High
Other Misc Deployment related - lack of OCNS in V2 (inhibits network acceptance procedures) High High
These will likely cause extended deployment time (struggle to meet performance objectives). Some of these have V3 FRSs associated so comment is mainly aimed at V2.
Presentation name - 26NORTEL NETWORKS CONFIDENTIAL
Acquisition toolsCall TraceTrace Mobile (QCT)GraysonRF AnalyzerRadcomIP sniffer
Post-processingRFO3GIDADIVA
Pre-launch OptimisationPre-launch Optimisation Network Monitoring&OptimisationNetwork Monitoring&Optimisation
NetworkNetworkLaunchLaunch
AcceptanceAcceptanceLaunchLaunch
Network Monitoring toolsNetwork Monitoring toolsAcquisition toolsOMC (Counters)Call Trace
Post-processingPrOptima
Acquisition toolsCall TraceTrace mobiles Grayson RF AnalyzerRadcomIP sniffer
Post-processingRFO3GIDADIVA
Trial & acceptance toolsTrial & acceptance tools
Trouble-Shooting toolsTrouble-Shooting tools
Tools PhasingPhasing
Presentation name - 27NORTEL NETWORKS CONFIDENTIAL
Tools RoadmapRoadmap
Tool . . . Week 19
Week 20
Week 21
Week 22
Week 23
Week 24
Week 25
Week 26
Week 27
Week 28
Week 29
Week 30
Week 31
Week 32
Week 33
Week 34
Week 35
Week 36
Week 37
Week 38
Week 39
Week 40
Week 41
Week 42
Week 43
UTRAN releasesCN releasesTTM FCS CR
Mobiles QCT QCT QCT QCT QCT QCT
Grayson
Call Trace CTb CTb
RFO
ProOptima
CTa, CTb
v 2v 2.0c v 2.0d
Motorola Motorola
Beta Version
Beta Version
v 2.0a v 2.0b
Presentation name - 28NORTEL NETWORKS CONFIDENTIAL
(R&D tools are not displayed on this chart)
GSMGSM
UMTSUMTS
RNCRNC
RNCRNC
BSCBSC
ACCESSACCESS CORECORE
GSMGSM
UMTSUMTS
PCUSNPCUSN
Iub ATM
Abis A
GbAgprs
Iur IuIP
IP
N*64K PSTNPSTN
InternetInternet
IntranetIntranet
CSCS
PSPS
Radcom IP sniffers
RFO
Trace MSGrayson
PrOptima
Call TraceA&SA&S
ServersServers
3Gida
Accesscounters
Corecounters
Utran functionality Acquisition tool Post-processing tool
RF Analyzer
DIVA
Tools ArchitectureArchitecture
Presentation name - 29NORTEL NETWORKS CONFIDENTIAL
UMTS Optimization tools UMTS Optimization tools – Description (1/4)Internal tool External tool Product Comments
Call Trace X Available in V2 => improvments in V3
Counters X Some available in V2 => new counters in V3
Trace mobile X Qualcom and possibly Motorola,…Qualcom acquisition S/W is QXDM until replaced by CAIT
Drive test platform X Grayson
RF Analyzer X Grayson or Agilent
Protocol analyzer X Radcom
IP sniffer X Network Monitor, Ethereal, TCPtrace
E2E Data Packet X R&D tool
RFO X (X) Internal but might be external
PrOptima X External only (no license for internal use)
3GIDA X R&D tool
DIVA X R&D tool
Acquisition tools
Post-processing tools
UTRAN functionalities
R&D tool (no support for external use)
Presentation name - 30NORTEL NETWORKS CONFIDENTIAL
• UTRAN functionalities to collect network data are : Counters : The system counts events and record them in registers called
counters. They enable the operator to observe and track the NE performance and the offered Quality of Service. Counters are grouped in functional areas: HO, Radio link Management, Mobility Management, Session Management, Traffic …
Call trace : Call Trace is a RNC feature that allows collecting detailed information : protocol messages (on one or more mobiles, cells, or interface), measurements, events,…This feature is available in V2 but will be strongly enhanced in V3.
• Acquisition tools are used to collect data : Trace Mobile (QualcomQualcom) : It allows collecting protocol messages on the
mobile side but also measurements on the DL path (air interface). Qualcom is currently used for field testing but other brands like Samsung or Motorola are also used in labs. Trace mobiles use a S/W for data acquisition. For first releases, Qualcom proposes QXDM. It should be replaced by QCAIT.
UMTS Optimization tools UMTS Optimization tools – Description (2/4)
Presentation name - 31NORTEL NETWORKS CONFIDENTIAL
Drive test platform (GraysonGrayson) : It mainly allows collecting data from more than one trace mobile simultaneously. Optionally, a scanner can be plugged and its outputs merged with the trace mobiles ones. Grayson solution is likely to be chosen by Eng’g.
RF Analyzer : It is a code domain analyzer that decodes scrambling and spreading codes and in general all UMTS channels. It is mainly used to estimate the RF quality of the network, but also for debugging purposes when a problem occurs on radio interface. Agilent E7476A is currently used but should be replaced by Grayson scanner.
Protocol analyzer (RadcomRadcom): It can be plugged on Iub, Iur,and Iu interfaces. The Radcom that is currently used can monitor 2 interfaces in parallel.
IP Sniffer : It is a protocol analyzer plugged on the IP network to spy IP traffic.
E2E Voice Quality / Data Packet : This S/W creates traffic (voice or data) on one End and collect it on the other End. It then provides statistics and metrics on this E2E session.
UMTS Optimization tools UMTS Optimization tools – Description (3/4)
Presentation name - 32NORTEL NETWORKS CONFIDENTIAL
• Post-processing software used are : 3Gida : This S/W is used to post-process traces provided by the
Radcom protocol analyzer. It allows decoding all protocol messages exchanged on Iu, Iub and Iur interfaces, but also computing metrics and statistics associated to UMTS data transfers.
DIVA : This S/W processes data coming from the Agilent RF analyzer, TENOR and E2E VQ/DP. It provides the user with RF statistics, voice and data metrics,…
RFO : This internal tool processes data from Call Trace and trace mobiles. It the provides the user with call statistics and numbers of RF analysis.
PrOptima : PrOptima uses counters and Call Trace data as inputs and process them, providing the user with monitoring statistics
UMTS Optimization tools UMTS Optimization tools – Description (4/4)
Presentation name - 33NORTEL NETWORKS CONFIDENTIAL