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Factors Affecting Throughput in LTE :-

Factors Affecting Throughput in LTE :- Low mcs, Low sinr, Low rsrq , high prb usage, wrong earfcn Definition, no Carrier aggregation ör missing ca configuration, Pci , Route sequence index collision, Wrong tac planning, gateway security problem, etc. air quality (now sinr, rsrq, etc etc), modulation level. For example, 16QAM, 64QAM, etc. Low Throughput Issue:- 1 - Poor coverage (BLER) 2 - Availability issue 3 - Uplink Interference 4 - A poor RACH decoding SR 5 - High error on S1 link. 6 - Delay on S1 link towards MME & SGW. 7 - Accessibility issue. 8 - Handover failure. 9 - Lack of PRBs. 10 - Problematic UE. 11 - Downlink Interference (Bad CQI) 12 - MIMO Parameters 13 - High VSWR 14 - High radio errors or instability issue. 15 - Maximum number of RRC connections active per cell 16 - Maximum number of users per TTI supported per cell. 17 - Core network, MME/SGW, etc 18 - Transmission instability & bottleneck. 19 - Incorrect parameter setting. 20 - Badly tuned handover parameters...
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RF Engineers

**Attention RF Engineers with E/// Experience (UMTS and/or GSM) for USA**
Work permit or US work eligibility is a must, send CV at: oguerra@msb.com
-We offer the best benefits in the US market-

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BIGGEST RF PROJECT IN THE US MARKET FOR 2010, BE PART OF IT

Consider this an urgent and high priority request. We need as many quality submissions as possible.

The duration on this request is 8-10 months. We are looking for 35GSM and 25 UMTS resources for this need.

GSM:

Scope of Work: Locations: NE, SE, WEST (Candidates should be flexible to travel) Significant and relevent experience in radio network design, implementation and tuning/optimization on GSM systems. Advanced knowledge of radio frequency engineering theory and GSM air interface. Knowledge of how the A-bis interface and the organization of Ericsson BSC/TRC. Extensive experience of optimization projects Knowledge of RNO (MRR, NCS, FAS) and traces (MTR, CTR). Practical experience of using these features in operating and improving radio networks. Extensive experience in network performance improvement utilizing OMC statistics on Ericsson GSM system. Practical experience of working with counters from STS. In depth understanding of Key Performance Indicators (KPIs) as defined by operators in the US. Working experience of optimizing the network to improve KPIs. Knowledge of how the features work and the ways to optimize features to obtain gains in network performance. General: Proficient with MapInfo, MS Office Flexibility of extensive travel within the US Excellent verbal and written communication skills Ability to operate with high degree of independence, while managing project and customer expectations Ability to identify and interpret customer requirements, and develop plans to address them Ability to provide training and guidance to less experienced RF engineers ***CANDIDATES MUST TRAVEL IF REQUIRED***
Start Date: 2010-05-10
End Date: 2010-12-31

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UMTS:

Status: Open
Scope of Work: Locations: NE, SE, WEST (Candidates should be flexible to travel) • Minimum four (4) years of RF Engineering experience. Minimum two years of recent experience in radio network design, implementation and tuning/optimization on WCDMA systems. • Experience in working with different RAB services - CS, PS, HSDPA • Understanding of signalling in between different interface specially Uu, Iub, Iur, Iu-C and Iu-P. • Able to make recommendations in parameter changes, feature activations on drive test data to improve the system performance. • Good understanding of optimization tools such as TEMS, Actix, Agilent • Experience in tuning a loaded network, and understand the difference between artificial and real traffic loading • Good understanding of Layer 3 messaging • Able to collect and analyze drive data and performance statistics • Knowledge on how IRAT procedures can affects the overall performance General • Proficient with MapInfo, MS Office • Flexibility of extensive travel within the US • Excellent verbal and written communication skills • Ability to operate with high degree of independence, while managing project and customer expectations • Ability to identify and interpret customer requirements, and develop plans to address them • Ability to provide training and guidance to less experienced RF engineers
Start Date: 2010-05-03
End Date: 2010-12-31

 

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