Aug 08, 2018 details of dt, how to drive test, how to pass drived test, basic of drive test. Lte is built on an all new radio access network based on ofdm orthogonal frequency division multiplexing technology. Every alive network needs to be under continues control to maintainimprove the performance. Prisma ran test solutions, designed to accelerate multistandard endtoend network verification, have already been chosen by leading network manufacturers to validate network functionality and performance across 4g, 3g and 2g, and to ensure a seamless user experience when handing over between different radio access technologies. Adjusting parameters values to improve performance on idle mode, prach, ho, anr, pdcch, pucch, etc. Dt results should match with the prediction results. Definition of quality of service parameters and their computation. Main elements involved in radio network are mobile station and base transceiver station.
Nemo outdoor is a laptopbased drive test tool for 2g, 3g, 4g, and 5g nr mobile network testing which supports over 300 devices and scanning receivers, from various vendors, all the latest network technologies and latest smartphones. Handover between two rats, for example between gsm and wcdma. Rf drive test measurements may include but not limited to following. Indoor performance measurements do not rely on views of the sky nor gps for positional information. Drive route and site data for the sites to be driven is taken from customer. For each drive test a team of two people should get involved. Rsrp is the most basic of the ue physical layer measurements and is the linear average power in watts of the downlink. Informasi yang dikumpulkan merupakan kondisi aktual radio frequency rf di suatu base transceiver station bts maupun dalam lingkup base station subsystem bss yang dilakukan dengan mobil sehingga pengukuran dilakukan bergerak. For carrying out optimization, it should be checked that all sites are in working condition and correct parameters are configured.
There are few ways to do this, for example through analysis of kpi key performance indicator or through prediction tools and signal interference. The data collected by drive test tool as log files is analyzed to evaluate various rf parameters of the network. A practical network will have cells of no geometric shapes. Telecommunication notes 3g2g muhammad naeem ashraf. Collection of the input parameters like requirement of capacity, coverage and. Lte drive test data can be analyzed during the drive test process as it is displayed on the screen. Drive testing is a method of measuring and assessing the coverage, capacity and quality of service qos of a mobile radio network the technique consists of using a motor vehicle containing mobile radio network air interface measurement equipment that can detect and record a wide variety of the physical and virtual parameters of mobile cellular service in a given geographical area.
Solution for radio optimisation in 3g service new challenges are there for qos, because of new wcdma radio. Used in more than 180 countries worldwide, tems investigation is the industry standard tool for troubleshooting, verification, optimization and maintenance of wireless networks with emphasis on the practical. Wcdma tems parameters investigation and drive testing. Performing an lte drive test is an important part of how wireless carriers determine whether their networks are performing well and get a glimpse into their competitors network performance. Lte drive test parameters telecom knowledge and experience. Dari data yang telah diperoleh tersebut kita dapat mengetahui kondisi jaringan di suatu daerah. Superfast browsing, uploading content to social networking sites. Drive testing is a method of measuring and assessing the coverage, capacity and quality of service qos of a mobile radio network the technique consists of using a motor vehicle containing mobile radio network air interface measurement equipment that can detect and record a wide variety of the physical and virtual parameters of mobile cellular service in a given. Dec 30, 2016 remember that rssi is only measured at those symbol times during which rs res are transmitted we do not have to take into the count dtx so, when there is no traffic, and assuming only the reference symbols are transmitted there are 2 of them within the same symbol of a resource block from a single tx antenna then the rssi is generated by only the 2 reference symbols so the result becomes. Drive testing lte 3 while the name drive test comes from the fact that the measurement equipment is generally driven in a vehicle, we should also mention that measuring indoor coverage is becoming increasingly important. Drive test merupakan suatu kegiatan untuk mengambil data collecting sebuah jaringan network dengan menggunakan software dan hardware tertentu. Alarms of nodeb and rnc should be monitored for any fault.
Common performance issues are as follows i voice call performance ii cs video call performance iii ps call performance iv intersystem handover performance call performance may be poor due to poor coverage. Mar 14, 2017 performing an lte drive test is an important part of how wireless carriers determine whether their networks are performing well and get a glimpse into their competitors network performance. Mar 11, 2016 get 3g dt training course with certification 3g wcdma dt drive test paramet. Drive test engineer resume example sublime wireless. The drive test is a test performed in cellular networks regardless of technology gsm, cdma, umts, lte, etc. The measurement process should be stopped the car stops eg near traffic lights or whenever the sampling and measurements look suspect. Lte drive test engineer 1120 to 042014 avion systems san diego, ca. Drive testing of 2g, 3g, 4g, and 5g nr mobile networks. This course of lte drive test covers the process of drive test, parameters of dt and analysis of log files etc. Telcoma global 3gwcdma dt drive test parameters on. What is kpi what are lte kpis, key performance indicators.
Every good rf design, after its implantation should be evaluated. When the test results were completed and submitted to the federal communications commission fcc, the psd analyzed the results to derive insights about mobile wireless service in the state. The benefits are many, including energy savings and higher machine output or productivity. Drive test plan, procedure and output for gsm teletopix. Remember that rssi is only measured at those symbol times during which rs res are transmitted we do not have to take into the count dtx so, when there is no traffic, and assuming only the reference symbols are transmitted there are 2 of them within the same symbol of a resource block from a single tx antenna then the rssi is generated by only the 2. Drive test postprocessing allows filtering data points by distance, frequency and other parameters and using different statistical methods to process drive test data. Optimization is basically the only way to keep track of the network by looking deep into statistics and collectinganalyzing drive test data. Rsrp is the most basic of the ue physical layer measurements and is the linear. Configuring drive parameters 32 choosing a programming device introduction hitachi variable frequency drives inverters use the latest electronics technology for getting the right ac waveform to the motor at the right time.
Evaluation of prediction accuracy allows users to tune prediction model parameters and achieve high precision calculation results. Rsrp and sinr optimization based on drive test and oss kpis. Engineer should study the drive test plan ahead of time and highlight the intended drive test routes. With radio resource management taking place in the enb, suitably instrumented phones can be used to monitor the performance of the physical layer including modulation schemes, access procedures, synchronization, and.
Dropped call handover with same radio access technologyrat for example gsm. Specified in 3gpp release 8, the air interface for lte combines ofdma based modulation and multiple access. Basic parameter of wcdma basic parameters of wcdma. Used in more than 180 countries worldwide, tems investigation is the industry standard tool for troubleshooting, verification, optimization and maintenance of wireless networks with emphasis on the practical considerations. As mentioned kpi is the short form of key performance indicator. Lte drive test parameter introduction linkedin slideshare. Drive test helps operation and maintenance for troubleshooting purposes. Reference signal received power rsrp this indicator measures the linear average of the received power on reference signal resource elements in the downlink during the drive test to check 4g coverage. Get 3g dt training course with certification 3g wcdma dt drive test paramet. With drive test measurement, key performance indicators kpi can be validated. Details of dt, how to drive test, how to pass drived test, basic of drive test. What is kpi what are lte kpis,key performance indicators. This report describes the drive test process, provides a summary of the results, and explains how.
These same parameters are exploited in drive test software to provide new value to the rf engineers rolling out the final network. Plz help me in this matter september 17, 2014 at 10. Pdf 3g tems parameters investigation and drive testing. Drive test merupakan salah satu bagian pekerjaan dalam optimasi jaringan radio. There are multiple types of lte drive tests, as well as specific parameters and requirements that should be met for drive tests. Performance indicators definition continued coverage is assessed based on the following radio parameters.
Nemo outdoor is a laptopbased drive test tool for 2g, 3g, 4g, and 5g nr mobile network testing which supports over 300 devices and scanning receivers, from various vendors, all the latest network technologies and. This page describes kpi key performance indicators basics including its categories and mentions lte kpis. Rsrp dbm rssi dbm 10log 12n where rssi received signal strength indicator n. Drive test log file of the specified drive route site is. The different test cases of lte kpi are mentioned for each of the kpi categories.
Check for overlapping, dlul ps long and short calls based on drive test and nominal planning data. Test platform multiple test model ues can perform different tests. Rf planning and optimization engineer resume in patna, br. Telecom 2g,3g,4g,rf lte drive test,optimization,ipv6 study. Measurable drive test driver test route is based on n field test drive test cluster, it is involved about 20 evaluate the overall network sites in one cluster usually.
347 1275 895 916 648 1599 370 1091 941 1240 921 167 132 39 146 1043 712 1351 802 169 121 1577 1226 1190 348 1254 32 709 399 638 1183 663 1294 469 1544 786 621 1580 450 1052 904 100 1297 257 97 1439 1058 5