Lauro joined Award Solutions in 2008, bringing over ten years of experience in the wireless telecommunication industry working with mobile cellular, broadband and satellite communications. Has a thorough knowledge and understanding of all standardized radio transmission technologies (i.e.: GSM, GPRS, EDGE, WCDMA, HSxPA, HSPA+,IS-95, cdma 1xRTT, 1xEV-DO) and non-standardized technologies (i.e.: Flash OFDM, I-Burst, etc.) as well as and their migration path to 4G and beyond (LTE and WiMAX).
Lauro has co-authored four different telecommunication books, has published 18 international refereed journal papers and over 30 international conference papers, all of them results of research in the wireless telecommunication area. Additionally, has presented over 20 different wireless related courses nationally and internationally to a diverse class of clients. Lauro has a thorough knowledge of mathematical analysis and hands-on experience on wireless and traffic engineering design, including Design, Planning, Performance & Optimization as well as computer simulation of mobile wireless networks. Through research and computer simulation techniques has helped a large base of clients (carriers, vendors, new start up companies) develop optimum technological solutions.
Currently, Lauro is one of the instructors at Award Solutions. His current focus is UMTS, HSPA/HSPA+ and LTE. He is also involved in the development of cutting edge training on optimization courses for LTE operators in the USA.
Lauro holds a Ph.D. in electrical engineering (EE) from King's College London, UK (the University of London), a MSc. In EE. and a B.EE from the National Polytechnic Institute, Mexico, all of them with specialty in telecommunications.
Filter Coefficient for Event a3
Once the UE is configured to do measurements, the UE starts measuring reference signals from the serving cell and any neighbors it detects. The next question is whether the UE should look at just the current measurement value, or if the recent history of measurements should be considered. LTE, like other wireless technologies, takes the approach of filtering the currently measured value with recent history. Since the UE is doing the measurement, the network conveys the filtering requirements to the UE in an RRC Connection reconfiguration message.
The UE filters the measured result, before using for evaluation of reporting criteria or for measurement reporting, by the following formula:
Then, the UE adapts the filter such that the time characteristics of the filter are preserved at different input rates, observing that the filterCoefficent k assumes a sample rate equal to 200 ms.
The parameter “a” defines the weight given to current value and (1-a) (i.e., the remaining weight is given to the last filtered value). For example, if filter coefficient k = 4, then a = ½^(4/4) =1/2. This means that new measurement has half the weight and the last filtered measurement gets the other half of the weight.
Example of Filter coefficient values are:
a) A high value of the parameter filtercoefficient will provide higher weight to old measurements (more stringent filter)(the opposite is true)
b) The higher the values of filtercoefficient the higher the chances of eliminating fast fading effects on the measurement reports
c) A value of 8 is typically used in the network although a value of 16 might also be used in dense urban areas.
Thanks a lot for all these (3 of 3) HO new information. I would like to cite from them, what should I refer to.
It is really perfect work.
I have posted a question about mathematical analysis of handover in LTE ( the response did not answer my question). And it is very obvious that you have a thorough knowledge of mathematical analysis.
Could you guide me to find a reference (i.e book, paper dco...) including all these analysis.