Customer Stories



Story 1: Developing RF Testing Solution for Viettel’s Worldwide Networks


Viettel is the largest mobile operator in Vietnam and running about ten mobile networks across the globe. In 2012, it wanted to monitor the RF signal deviation of base stations during a period. The traditional approach was to stop base stations but Viettel did not want to do that as it would affect to the service to customer and the number of base stations was huge. COMIT’s engineers studied Viettel’s problem and offered a solution to conduct the test with JDSU CellAdvisor via air interface and the 3GPP TS 25.141 standard. In particular, engineers from COMIT and JDSU defined and developed a new feature that allows the JDSU CellAdvisor to monitor and store test results during a period instead of one result as per the old version.

The solution was successfully applied in Viettel network in Vietnam and helped it improve QoS significantly. The solution was, then, widely deployed to Viettel’s networks in Cambodia, Peru, Mozambique, etc.





Story 2: QoS Benchmarking for Top 3 Mobile Operators in Cambodia and East Timor


In the middle of 2013, Metfone and Telemor wanted to benchmark their QoS among Top 3 Mobile Operators in Cambodia and East Timor in order to define their competitive service level and to optimize their coverage and service quality. And COMIT was chosen to benchmark for its voice and data service, GSM and WCDMA, QoS KPIs including CSSR, DCR, MOS, HSPA Throughput, etc., and the coverage KPIs by the indicators such as RSCP, EcNo, RxLev, RxQual, etc.

In order to address customers’ request, COMIT deployed 3 benchmarking systems with 45 test mobiles, 9x3G data cards and Outdoor Drive Test systems in 3 months from May to July with the involvement of 2 Project Managers, 9 Field Engineers and 8 RF Engineers. Although working abroad in the hottest months of the year, COMIT’s engineers overcame all difficulties to implement successfully this benchmarking project and deliver sophisticated benchmarking reports which met the deadline and requirements from its customers. Furthermore, COMIT not only provided a lot of useful information and data with the benchmarking reports for its customers’ quality control and optimization, but also is always willing to support customers when they need even after the project has ended.





Story 3: Improving GSM Network Quality


In 2009, COMIT was responsible for the improvement of GSM network quality in the 3 provinces of Phu Yen, Dong Thap and Binh Duong for Vinaphone - one of top three mobile operators in Vietnam. The operator, in particular, emphasized the goal of reducing DCR (Dropped Call Rate), increasing CSSR (Call Setup Success Rate), HOSR (Hand-Over Success Rate) and MOS (Mean Opinion Score) among KPIs (Key Performance Indicator) to be improved. COMIT’s engineers and consultants implemented a full life-cycle RF optimization for about 600 Motorola and Huawei BTSs. The scope of work ranged from Network Audit, Analysis & Change Proposal, Implementation of Proposed Changes, to Change Verification. The project was implemented in over 4 months, involved 12 Drive Test teams, 12 Site Audit teams, 2 QoS teams, 3 Project Managers and 7 RF engineers and consultants.


* MOS increased 3.3%.

* CSSR and HOSR increased above 20%.

* DCR reduced more than 20%






Story 4: Helping Ericsson Optimize Its Customer’s Network


Vietnamobile – an Ericsson’s customer, in 2013, would like to extend the coverage and improve the quality for its existing RAN. It requested sophisticated optimization requirements related to its coverage, KPIs (Key Performance Indicator), bad events handling, etc. COMIT managed part of the operation from Ericsson that covered full lifecycle RAN optimization for about 400 BTSs scattering in 26 provinces during 6 months. The scope of work covered drive test, data collection, data analysis, change recommendations, change implementation, output power & VSWR measurement, hardware-faults fix, KPIs monitoring, audit after optimization and reports.  COMIT dedicated 8 Drive Test teams, 8 Site Audit teams, 2 Project Managers, 5 RF engineers and consultants.

With the utmost effort of all team’s working day and night for this project, COMIT delivered this project successfully and exceeded the strict requirements of customer. The improvement was in two-digit percentage points and helped the customer operate its network much more efficiently.




Story 5: Ensuring QoS for International Roaming in 8 Mobile Networks of Viettel


Until 2014, Viettel has invested in 8 mobile networks worldwide, including Viettel in Vietnam, Unitel in Laos, Metfone in Cambodia, Telemor in East Timor, Natcom in Haiti, Bitel in Peru, Movitel in Mozambique, and Viettel in Cameroon. It has had a critical demand for ensuring the QoS for international roaming services within its 8 networks and with the rest networks in the world.

COMIT provided Viettel with a solution that is based on Keynote SIGOS to put 8 CLUs in 8 target countries and all are connected to central servers in Viettel’s headquarter in Vietnam. This system is also connected to Keynote SIGOS’s Global Roamer – a network that allows Viettel to test roaming services with over 750 operators in 200 countries worldwide. The whole system performs QoS analysis for international roaming services according to GSMA IREG 24, IREG 32 and IREG 35.

This solution helps Viettel proactively ensure the QoS for international roaming service for its networks while saving investment and costs.



Story 6: Asssuring QoS/QoE with the Deployment of an Optical Network Monitoring System in Movitel (Mozambique)


In early 2015, Movitel had possessed the largest mobile infrastructure in Mozambique, of which, the optical backbone plays a critical role. The network expansion over the 2nd largest country in Africa has raised big challenges to Movitel in maintaining the quality and connectivity of its optical network, and through that, to assure the QoS/QoE of its service delivery.


COMIT’s engineers spent a few months in Mozambique and deployed successfully an Optical Network Monitoring System based on Viavi’s solution. The system has helped Movitel shorten the troubleshooting time, forecast the quality decline of optical links and initiate preventive solutions. It has also helped Movitel manage its resource more efficiently upon useful statistics and data generated.



Story 7: Providing RF Spectrum Monitoring System in Myanmar 

The rapid development of the Myanmar telecom industry has brought many challenges to Myanmar’s telecom regulator. One of them is how to manage and plan RF resource efficiently. And the deployment of a RF spectrum monitoring system is an answer.

COMIT worked closely with Myanmar’s telecom regulator to understand deeply their needs and requirements in both technical and application aspects. They needed a RF spectrum monitoring system with directional finding for mobile networks (20 MHz - 3 GHz), multi-channel, bandwidth of 20 MHz, etc. They required the mobility in all terrains.

COMIT, together with its local partner, offered them a solution from TCI, a US-based company that provided similar systems to many countries from North America to Europe, and Asia. With extensive experience from systems that were deployed and customized in Vietnam, we offered the customer with a solution that is customized and integrated into sport utility vehicles instead of vans. This is to bring the superior mobility for a RF spectrum monitoring system in all kinds of terrains from plains to mountains. Our solution was chosen and has been deploying.







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