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Lauro
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Lauro
Frame Structures in LTE-TDD and LTE-FDD
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Lauro
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So far, we have concentrated our efforts in describing LTE-FDD. However, as TD-LTE gets deployed in the USA, more blogs on this technology will be published. In this occasion, we will describe the frame structure of both, LTE...
Lauro
RACH Preamble Planning
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Lauro
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The total number of RACH preambles available in LTE is 64. These preambles are shared among users for initial access and handover. Access to LTE systems can be classified based on the reservation or not of preambles for access...
Lauro
Handover Parameters (Part 1 of 3)
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Lauro
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There are three ways of optimizing handovers in LTE: a) Via the modification of the parameters a3offset and hysteresisa3 b) By changing the parameter timetotriggereventa3 c) Via the modification of the parameter filtercoefficient...
Lauro
Downlink Throughput Troubleshooting
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Lauro
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In this blog we will briefly describe general troubleshooting guidelines for downlink throughput in LTE networks with MIMO 2x2. The reader is advised to look for particular counters in their respective OEM’s documentation...
Lauro
Drop Sessions (Part 1 of 2)
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Lauro
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There are several reasons why a session may drop in LTE. However, whether the session is dropped or not depends on the particular vendor implementation. That is, the drop may be caused by a UE message or by measurements carried...
Lauro
RRC connection Release
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Lauro
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Often time while doing a drive test the RRC collection released gets logged by our data collection tools and later, while debugging our drive tests we see, RRC connection Release. Many times we wonder why we received that message...
Lauro
Format 2: PUCCH Capacity Calculations
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Lauro
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In this blog the capacity of the PUCCH for format 2 is assessed. The following table shows the PUCCH formats used for channel feedback. The channel feedback could carry channel quality indicator (CQI), Precoding Matrix Indicator...
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