LTE RF Engineer

Rafael Valiente Barroso

E-mail: ******@*****.*** Birth date: Sept 22th-1982

Mobile phone 1: +52-551******* Nacionality: Colombian

Summary

RF Engineer with 6 years of experience. LTE/UMTS/HSPA/GSM/EDGE network planning and optimization of radio access network parameters. Fluent in English, Spanish (native) and good level of German. Capacity of leadership and multinational teamwork organization.

RF Experience

Ericsson – Global center- Mexico City:

LTE RF Planning and design Consultant

May 2011-

AT&T US Market, LTE design with Atoll Radio Planning tool and Capesso ACP tool, following the ND-00369 LTE RF Network design guidelines. LTE initial tunning, pre-launch

Entel Uruguay carrier LTE network design .

Huawei – Telcel LTE Trial Mexico- Mexico City:

LTE Trial RF Planning and Optimization Team Leader Consultant

Jan 2011-Apr 2011

Daily training to the RF Team, cell planning parameters, random access, LTE air interface, Handover procedure, cell search, selection and reselection, IRAT with UMTS/GSM, MIMO ways of transmission SFBC and TX diversity according to UE speed, SINR, Spectrum efficiency and TX/RX correlation.

Supporting preplanning of 200 sites, analyzing planning parameters, with U-Net and Atoll Planning tools.

Neighbors planning, PRACH Planning, X2 planning for ANR, PCI planning. Checking Frequency Scheduling and ICIC parameters and the influence of power boosting over RS signals.

Checking and analyzing AMS(Active MiMO switching) triggered by SINR Threshold improving coverage and capacity.

Analyzing traces and Drivetest of the first LTE call, checking MIMO behavior, throughput, SINR, Uplink power over PUSCH.

LTE network design for Nicaragua Huawei trial of 32 sites, coverage plots, adjusting LTE design parameters. Simulation with MIMO tx techniques 2x2 and 4x4.

LTE RF Planning and Design Certification Workshop – Dallas TX USA:

Nov 2010

Virtual LTE Network deployment based on Atoll tool: Link budget calculations for Uplink and Downlink. Coverage prediction maps (i.e: RSRP, C/I, throughput).

Exploring Antenna techniques: SFBC Frequency diversity for users near cell edge, SU-MIMO and MU-MIMO, MCW or TX diversity for good RF conditions users. Comparison between single antenna and 2x2 MIMO transmitting at same time but different frequency In order to avoid multipath fading, throughput prediction maps observing improvement on the throughput by % coverage area (Atoll).

Calculation of throughput depending on modulation and number of retransmissions. Preamble planning using root sequence index and cyclic shift, PCI planning according to PSS and SSS. Cell selection and reselection criteria. Inter-RAT events B1, B2.

CLARO - Panama

GSM/EDGE/UMTS/HSPA+, Huawei project

UMTS Consultant RF Optimization Engineer

FEB 2010 – JAN2011

.

UMTS/HSPA radio access network optimization (capacity, coverage, quality) by checking counters and stats parameters, neighbor list optimization, Inter-RAT parameters, checking channel elements, codes, IuB, and power congestion, R99 and HSDPA Throughput (tools : iM2000, UMTS LMT).

Optimizing Pilot pollution, high RTWP, Overshooting sites, missing neighbor relations, SHO success rate. Identifying HW issues, Drop Calls and access issues.

HSPA+ parameters optimization, keeping clear RF environment observing CQI and STATS

DT measurements data collection, analysis and post-processing in order to improve CPICH RSCP and Ec/No, due to physical modifications (antenna’s azimuth, tilts, height), or parameters optimization. (Tools: Actix spotlight, Genex Assistant, Atoll, UMTS LMT).

Delivering Clusters performing under the KPIs Thresholds.

UMTS/HSPA radio access network planning, tuning propagation models, traffic Monte-Carlo simulation (capacity, coverage, quality, parameters) using prediction tools such as Atoll, Genex U-Net

UMTS/HSPA radio access network KPI’s definition and performance analysis for optimization.

UMTS/HSPA drive test data collection, post-processing and analysis for KPIs report generation, and Sites acceptance reports.

Optimization using CHRs (call history records) and float busy hours queries, in tools like: Omstar WCDMA Kylinpro, Nastar WCDMA.

Identifying and solving problematic cells, using DT, statistics and traces.

Perform and analyze traces on a regular basis.

Drive tests data collection, post-processing and analysis for KPIs reports generation.

Digicel - Honduras

GSM/EDGE/UMTS/HSPA+, project

UMTS Consultant RF Planning and Optimization Engineer

SEPT 2009 – JAN2010

Recommendations of parameter sets for reselection and cell change based on comparison of scanner and UE measurements to improve the performance of HSDPA.

Analysis of Layer 3/2, history of TPC, Mode reports and others to find the causes of problems around the network for the different services.

UMTS/HSDPA radio access network optimization (capacity, coverage, quality) by DT measurements data collection, analysis and post-processing, physical modifications (antenna’s azimuth, tilt, height), parameters optimization.

Perform constant following of KPIs to observe the performance of the network and coordinate the efforts of the drive test team to reproduce the problems detected through statistics.

New sites recommendations based on plots of quality and statistics, to compensate cases of high load created by the increasing traffic on the network.

Coordinate activities of optimization such as cleaning of non-necessary neighbors, optimization of 3G-3G and 3G-2G neighbors, check of active set size required for different sectors taking into account drive tests and statistics.

Give technical support to test features like Service Based HO, or Direct Retry.

Give technical support to solve problems related with the 2G network affecting the IRAT or cell change.

Load Balance techniques, Load Reshuffling according to the amount of congestion.

LHA Solutions Colombia

GSM/UMTS/HSDPA project

UMTS/GSM Consultant RF Planning Network design Engineer

Apr 2009 – Aug 2009

UMTS/HSDPA radio access network planning (capacity, coverage, quality, parameters) using prediction tools such as Planet EV and TCPU.

UMTS/HSDPA radio access network optimization (capacity, coverage, quality) by DT measurements data collection, analysis and post-processing, physical modifications (antenna’s azimuth, tilt, height), parameters optimization.

UMTS/HSDPA radio access network KPI’s definition and performance analysis for optimization.

UMTS/HSDPA drive test data collection, post-processing and analysis for KPIs report generation.

GSM/GPRS/EDGE radio access network planning and optimization (capacity, coverage, quality).

GSM/GPRS/EDGE radio access network KPI’s definition and performance analysis for optimization (HO success rate, DC rate, cell congestion, RLC throughput, C/I, MOS, PCU load, TBF success rate).

GSM/GPRS/EDGE BSS parameter planning and optimization.

GSM/GPRS/EDGE radio access network azimuth, tilt, power, neighbor relationships, FP, BSICs, MAIOs, HSNs planning and optimization.

Benchmarking and drive tests data collection, post-processing and analysis for KPIs reports generation.

Propagation models tuning.

Digicel Panama

GSM/EDGE/UMTS/HSDPA RF Planning and Optimization Engineer

Ericsson/Huawei 1900 MHz

FEB 2007 – Mar 2009

RF Cell Planning support, simulating the coverage of all new candidate sites and studying the expected traffic depending on the average population in different places around Panama. (Initial Tuning).

Programming some CNA tasks under RNO to analyze the behavior of some sites checking if they need some optimization improvements.

UMTS/HSDPA radio access network planning (capacity, coverage, quality, parameters) using prediction tools such, TCP (Tems Cell Planner).

UMTS/HSDPA radio access network initial tuning and optimization (capacity, coverage, quality) by DT measurements data collection, analysis and post-processing, physical modifications (antenna’s azimuth, tilt, height), parameters optimization.

UMTS/HSDPA radio access network KPI’s definition and performance analysis for optimization.

UMTS/HSDPA drive test data collection, post-processing and analysis for KPIs report generation.

Optimizing RAN, under OSS checking Dropped Calls, HO incoming, outgoing and reversions, TCH Drops, SDCCH Drops, analyzing STS counters also.

RF Frequency Planning Design Support over some places on Panama City when network growth was required.

Coordinating and Supervising Technical Site Surveys (TSS) with the RF point of view. Drive Testing of new integrated sites and for Benchmarking.

Troubleshooting issues during the Drive Test for Initial Tuning, (Frequency Interferences, Accessibility & Coverage).

Analyzed Drive Test. With TEMS Investigation.

Post-processed GSM Drive Test log files using MapInfo and Actix as a Post-Process tool.

Checking and requesting some Trouble-tickets for RF network improvements related to Hardware optimization

Using MRR , RPMO checking if some optimization improvements were required over some cells.

GSM/GPRS/EDGE radio access network planning and optimization (capacity, coverage, quality).

GSM/GPRS/EDGE radio access network KPI’s definition and performance analysis for optimization (HO success rate, DC rate, cell congestion, RLC throughput, C/I, MOS, PCU load, TBF success rate).

GSM/GPRS/EDGE BSS parameter planning and optimization.

GSM/GPRS/EDGE radio access network azimuth, tilt, power, neighbor relationships, frequencies, BSICs, MAIOs, HSNs planning and optimization.

Identifying and solving problematic cells, using DT, statistics and traces.

Comcel Colombia

2G/3G RF Planning and Optimization Engineer

NSN 850 & 1900.

APR 2005 – JAN 2007

RF optimization and cell planning, SC planning design support using Planet EV as Cell-planner simulator.

UMTS Radio Network Optimization, checking for amount of traffic, congestion and Interferences. .

Definition and keeping KPIs observing the performance of the network and coordinate the efforts of the drive test team to reproduce the problems detected through statistics.

Coordinating Site Survey, Site Auditioning

Making some re-orientation for new sites (Mechanical and Electrical Tilts, azimuths).

Planned Drive Test Routes, study of Benchmarking for Competitors.

Troubleshooting issues during Drive Test after new sites comes to air or Benchmarking.

Drive Testing Troubleshooting for Benchmarking and for requested changes on existing sites

Post-processing UMTS Drive Test log files.

UMTS/HSDPA radio access network KPI’s definition and performance analysis for optimization.

Keeping Clusters according to the KPIs Thresholds.

Physical Optimization, azimuths, tilts.

Evaluating Site Hunting and Technical Site Survey.

Validate RF initial designs and assist the early stages of the deployment of a UMTS/HSDPA WCDMA RAN (TSSs, simulation, installation, initial parameters tuning and neighbor relationships definition) alongside NSN, for the main cities in the Caribbean coast of the country.

UMTS/HSDPA radio access network planning (capacity, coverage, quality, parameters) using prediction tools such as Planet EV.

UMTS/HSDPA radio access network initial tuning and optimization (capacity, coverage, quality) by DT measurements data collection, analysis and post-processing, physical modifications (antenna’s azimuth, tilt, height), parameters optimization.

GSM/EDGE radio access network planning and optimization (capacity, coverage, quality).

GSM/EDGE radio access network KPI’s definition and performance analysis for optimization.

GSM/EDGE BSS parameter planning and optimization

Education

• BSc.: Electronic and Telecommunications Engineering – Universidad del Norte, Colombia, Mar 2005.

• Specialization Course: Telecommunications Systems – Universidad del Norte, Colombia Jul 2007.

Skills

Knowledge in Huawei, Ericsson Nokia Technology, equipment and tools.

.Experience dealing with Cx and Tx Departments, keeping the RF mission.

Working on group as a leader team, creating work plan.

Excellent interpersonal relations and easy sharing information among the work team.

.Experience working with multinational work teams.

Experience with Initial Tuning and Re-Tuning , Working on short and long time projects.

Satisfying customers requirements under RF criteria.

Advanced English language, basic German and Spanish as a native speaker.

Seminars and Courses Summary

LTE RF Planning and Design Workshop LTE University. Award Solutions

• 3GSYSTRA, Nokia UMTS training

• 3GRPLS, Nokia UMTS Radio Planning Specialist

• RANPAR, Nokia UMTS Radio Parameters

• UMTS Planning Optimization by AIRCOM.

• GSM Radio Network Features - Nokia.

• GSM Cell-Planner fundamentals – Nokia,

• GSM Technical Site Survey – Nokia

• UMTS Optimization by QUALCOMM

• Services and safety with Linux - Universidad Del Norte

• Advanced English – Universidad Del Norte.

• Basic German – Universidad Del Norte.

• Project manager Seminar – Universidad Del Norte.

• Telecommunication Systems and Networking – Universidad Del Norte.

Software Summary

• Atoll, Genex Probe, Genex Assistant, Nastar GSM, Nastar UMTS, Actix Analizer and Spotlight

• iM2000, UMTS and GSM LMT, U-net, Aexio Zeus, Omstar kylinpro.

• Planet EV, TEMS Cell Planner, ICS Telecom, Moshell.

• TEMS Investigation (Data Collection and Route Analysis), MapInfo.

• Winfiol, OSS CNA, FOX RTMP, MCOM, Business Object.

• Pathloss 4.0, Google Earth.

• Microsoft office Applications

References

Available upon request

Contact this candidate