Senior LTE RF Engineer
Fircroft
مجموع سنوات الخبرة :22 years, 3 أشهر
• Planned 50 TDD and 20 FDD sites and performed initial tuning/acceptance of roll out sites. Escalate critical Hardware issues to Project team to meet KPIs within timeliness. Get SAF, SSV format, parameter settings, license and features, KPI targets locked with the customer. Prepare neighbors scripts for sites without InterRAT ANR license. Designed, implement and commission 5 Indoor 3G/FDD sites.
• Perfomed Redesign of major city (90 sites) with Unet AFP leading to improvement in 10% in SINR and 5% in coverage.
• Performed carrier addition on 35 TDD and 20 FDD sites and carrier aggregation on 30 TDD sites. Propose RRU/Power upgrade on 150 sites and baseband board upgrade on 100 sites
• Conducted comprehensive Throughput/user capacity evaluation of 550 sites, suggested license reshuffle where possible and license upgrade to improve accessibility and meet future traffic requirements.
• Conducted radiation survey and ensured EMC/EME/EHS compliance. Generate RF/rhapsodize and Site Plume diagrams with RF MAP2. Mark exclusive zones for general public and occupational limit
• Carried out software upgrade from Version 3 to 6 & 7
• Analyze layer 3 messages and call flows to investigate the root cause of degradation. Collaborate across multiple functions to ensure network wide changes are implemented smoothly
• Perform KPI analysis and optimize the V7.0 Huawei LTE (TDD&FDD) and Nokia RL40 network
o Improved RRC success rate from 97 to 99.3%, ERAB rate from 98.3 to 99.8%
• Conducted trial on UL power control, PDCCH algorithm, ICIC, Frequency selective scheduling, UL MIMO. UL Adaptive Harq, C-DRX, CCE adjust, RBG allocation UL hopping, MU beamforming, EPF factor, Closed Loop MIMO, TM8, SON ANR, SON MRO etc.
• Leading a team of 3 engineers. Translate customer requirements into optimization strategies and detailed plan to achieve targets. Collaborate across multiple functions to ensure network wide changes are implemented smoothly.
• Improved performance of 36 worst cells
o Resolved cross feeder issue on 6 sites
• Proposed capacity expansion, reduced paging deletions, identified LAPD rejections and A interface failures
• Develop CDD and perform initial tuning of roll out sites. Ensured EME compliance for field teams
• Communicated directly with CxO level, explained network issues and suggested appropriate solutions for improvement
• Initial tuning and KPI optimization of 600 Swap sites
• Escalation and follow-up of operational issues
• Benchmark performance of assigned cluster and present PAC reports to customer to get acceptance
•2G/3G/LTE Consultant with Etisalat(UAE) on the Post optimization project
•Perform optimization of Huawei RNC
•Make cell plans for 2G/3G site integration. Perform initial tuning and ensure KPIs are met
•Improved success rate of IRAT, Directed Retry, paging and LBHO
•Improved EcNo of the network through PCPICH power modification and Redesign.
•Implemented the URA feature and designed URA boundaries.
3G/LTE RF Optimization Consultant with Huawei-Nextel(Mexico), Ericsson-AT&T (USA) on the 3G/LTE Roll-out (offshore) project.
•Post processing of logfiles, report generation and issue escalation.
•Initial tuning of roll-out sites including SSV and cluster acceptance.
•Identify parameter discrepancies, PCI collisions, cable swaps, overshooting, interference etc.
•Conduct event analysis like attach failures, RRC setup failures, ERAB releases, TA update failures, ping pong HO/reselection, paging discards, PRACH failures etc. Modify ANR, MRO parameters. Benchmark the effect of changes. Packet analysis through wireshark.
•Meet Site/Cluster target KPIs to get acceptance from customer.
3G RF Optimization Consultant with Vodafone-Turkey on the 3G/HSPA Remote Optimization Project. Equipment is Huawei
•Post processing of 3G DT log files, analyze problematic areas, RRC Connection, RAB Establishmentand events (for e.g dropped calls, blocked calls, hard/soft/IFHO/IRAT failures, Location updates, paging) by decoding Layer2/3 messages and call flows using TEMS 11, Actix, Mapinfo, MCOM, MIPT. Recommend changes in Neighbors, soft/hard parameters.
•Achieve major KPIs for a cluster of 33 sites
oAccessibility: tune Idle, power control& load parameters to improve RRC and RAB rates
oRetainability: neighbor tuning, change load thresholds to shift traffic, propose new sites/sectors to improve coverage holes, identify and escalate hardware issues, remove pilot pollution and tune power offsets. Improve CS/PS drops rates.
oMobility: tune event trigger/exit thresholds, attempts, intervals, hysteresis etc
•4G LTE Huawei 3900 and Ericsson L11, RBS6000(Training)
-Physical Layer Protocol and Channels
-Planning: Link Budget, RF channel environment, model selection, antenna theory
-Idle mode behavior and Layer 3 signaling, Power control of Signals
-Accessibility: RRC/ERAB setup rate, admission control, PRACH power ramping
-Retainability: VOIP/Service call drop rate, Load Balancing, congestion control,
-MobilityTune offsets, hysteresis, time to trigger etc to improve Intra freq, Inter freq and Inter RAT HO rates, ping pong handover rate. Adjust FAST ANR, MRO during early and later stages. PS attach and contect activation optimization.
-Integrity:Throughput and RTT/PING/Packet delay optimization
-Power Control
-Post processing of log files through Probe. Report generation and analysis through Assistant
2G/3G RF Optimization Consultant with DU(UAE) on the 2G/EDGE NSN and 3G Huawei Rollout Project
•Monitor the performance of 2 RNCs with 120 sites on daily basis.Responsible for reducing congestion and drops, improving the IRAT Handover, Soft Handover, Location Update, Paging, CSSR, RRC Connection & RAB Establishment Success rate.Analyze raw counters of worst cells and suggest hard/soft parameter changes to improve KPIs. Monitoring Network Alarms for badly performing cells and follow up with operations for early resolution of issues. Carry out parameter and neighbor Audit. Use PCHR traces to trouble shoot problems and recommend solutions. Use PCHR traces to trouble shoot problems and recommend solutions.
•Verify the performance of newly integrated sites throughSingle Site and Cluster level reports. Monitor fresh dumps to remove parameter discrepancies. Ensure the vendor complies with the agreed KPIs. Highlight unresolved events to the vendor like dropped calls, blocked calls, hard/soft/IFHO/IRAT failures, Pilot pollution and poorEcNo/RSCP patches. Verify the resolution of issues through Re-drives and KPIs/sub counters.
•Perform nominal planning of 2G sites. Conduct technical site surveys and area profiling.
-3G UMTS(Training)
-Knowledge of NSN and Ericsson parameters
-Planning: Capacity/Coverage planningbased on estimated loading and orthogonal/SHO/Fading/Diversity factors. .Comprehensive understanding of RF channel environment (fast fading, slow fading, time dispersion, scattering, diffraction, morphologies, wave length/frequency dependence, etc.)
-Antenna optimization to reduce pilot pollution, improve coverage and quality.
-Handover control: Soft/Inter Freq/Intra Freq/IRAT/R99 to HSDPA/ISHO/load based HO for traffic balancing. Compression mode, HO signaling, Neighbortuning etc.
-Power control: Fast/Outer/Open/slow/compressed mode, CPICH Power
-Load control:PUC(idle mode), IAC/CAC(UE Access), LDB/LDR/OLC(Dedicated mode)
-Admission control
•Worked on the optimization of SiemensBR10 and Huawei2G/2.5G BSS.Responsible for optimizing 5 BSCs with 200 sites.
•Direct interface with the client and leading a team of 10 engineers.
•Plan IBS/DAS systems for corporate clients and Hot spots. Perform Link budget, path loss, equipment selection analyze walk test results etc.
•Performed swap of 100 sites from Nokia to Huawei-6900, parameter/KPI/Power mapping and post optimization. Re-tune network to adress issues raised by customer and ensure site/cluster PAC/FAC are achieved within time.
•Worked on the optimization of NokiaFlexi/Ultra 2G/2.5G BSS.Ensuring KPI targets and Project goals are met and the customer’s business requirements are fulfilled. Responsible for optimizing 3 BSCs with 125 sites.
•Performed statistical analyses of BSS reports and carry out Parameter optimization. Suggest and fine tune Handover, Power control, BTS, Adjacent parameters to improve DCR, HOSR and CSSR. Perform optimization of newly integrated sites. Took initiative in KPI improvement trials of parameters and new features.
•Participated in Re-homing and LAC split activities
•Managed the Redesign, MCPA and mixed BCCH project of the north region. Lead a team of 18 Riggers and employ skill build measures. Redesign the RAN of important citiesto improve coverage issues, overshoots, multiple server problems, bad quality patches and drop calls. Verifyredesign recommendations through Asset prediction.
•Carry out Antenna optimization techniques (H/VBeam width, Gain, mechanical/electrical tilting, Height, power setting). Initiated VSWR checks and highlighted discrepancies in the Network Audit(like Intra/Inter Band Antenna mismatches).
•Perform nominal and detailed RF design. Perform link Budget analysis keeping in view RF channel environment. Conduct technical site surveys. Select appropriate prediction model (Okumura, Hata, COST231)and tune Antenna/Height/tilt variables in prediction software to achieve desired coverage.
•Plan IBS/DAS systems for corporate clients. Perform Link budget, path loss, equipment selection analyze walk test results etc
•Participated in Site rehomings, LAC split etc
•Perform Neighbor, frequency (AFP/BSIC/MAIO/MA list)optimization to improve quality of GSM band. Use Asset AFP for BCCH planning
•Traffic/Dimensioning planning based on Traffic trends and Special Events. Evaluate and propose TRX/sector expansions. Remove SDCCH/TCH blocking and reduce SD drops.
•Monitor abnormalities in the Network. Escalate hardware issues to field Operations
•Analyze drive test logs withActix, TEMS, MapInfoandActix. Decode layer three messages and propose physical and soft parameter changes.Conducted drive test using TEMS investigation and resolved RF/Customer problems on spot. Detect and remove cable swaps. Generate various reports from Optima and NetAct.
•Coordinated the Rollout of Huawei WLL CDMA network. Coordinated with the vendor, internal departments and sub contractor in the roll-out of Network. Ensured compliance with agreements, timelines and technical specifications (during commissioning/PAT) etc.
•Developed database for the site audit data and manage the consistency of network data.
•Conducted VSWR testing using Site Master and interference analysis through spectrum analyzer
•Managed the Expansion Project of the Digital Cross Multiplication Equipment (DCME) from the conception to commissioning stage. Participated in the prequalification process, RFI/RFP/Tender preparation, described technical parameters, evaluated proposals. Participated in contract agreement preparation, developed and monitored project implementation schedule, coordinated activities with vendor to meet deadlines. Conducted post-installation testing with vendor, verified Invoices/BOQ, issued PAC etc.
•O&M of the (DCME) at the International Media Access Point (IMAP). Coordinated with International carriers to establish new links and conducted loop testing of circuits. Provided assistance to the Gateway Switch in conducting Routing, traffic analysis, problem identification and rectification. Provided media to the Gateway Switch and extended International Lease Circuit Service (IPLC) to Mobile Operators and other corporate clients.
•Coordinated the launch of DSL service. Provided DSL servicesand coordinated activities with cross functional teams to resolve customer complaints. Provided Broadband/Interconnect access services (E1, ISDN BRI/PRI) and customer support to some of the largest ISP and DSL service providers in Pakistan. Introduced WiFi, High Speed and Hub modems Resolved interconnect disputes and ensured compliance with Service Level Agreements (SLA). Experience in Planning of OSP network.
•Act as team lead and provide training to a group of technicians
•Worked on a multimillion-dollar USB project for the IC manufacturing giant Atmel. Designed, coded& tested firmware of the USB version 1.0, 2.0, OTG. Protocol testing using logic and soft analyzers.