Drive Test 4G5G

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=vXObpQa8CCQ

***Course on Network optimization is at - https://www.itelcotech.com/course/4g-... • Drive Test - 4G/5G • A comprehensive field test termed drive test is conducted by telcos to assess the performance of mobile networks to incorporate efficiency and provide best in class services. • This field test acquires, and monitors information exchanged between the UEs (User equipments) and the base station (BS) to analyse the 4G/5G network over the air interface through different parameters and layer 3 messages. • Commonly analysed parameters in 4G/5G are : - • · For Coverage - Reference Signal Received Power (RSRP) - This indicator measures the linear average over the power contributions of the resource elements that carry cell specific reference signals within the considered measurement frequency bandwidth. • · Received signal strength indicator (RSSI) - Linear average of the total received power observed only in OFDM symbols containing reference symbols for antenna port, which is measured over the entire bandwidth, includes co‐channel serving and non‐serving cells, adjacent channel interference, and thermal noise. • · For Quality - Reference signal received quality (RSRQ)– This indicator measures the ratio of wanted signal to all received power in the downlink during the drive test. • · Signal to Noise Ratio (SINR)– This indicator measures the ratio of the power of all subcarriers that make up a cell‐specific reference signal to the power of the interference (I) plus noise (N) over the same subcarriers. • Along with above parameters, system information can be analysed through layer 3 messages in drive test – • · Master information block (MIB) is used initially to give information about carrier bandwidth, system frame number to sync UE with the network in downlink and indication about the hybrid automatic repeat request (HARQ) for error detection correction. • · System information blocks (SIB) - SIB1 tells UE about the mobile country and network code so that UE selects the right network to which it got the SIM from. SIB2 messages informs users about the cell range through preamble and indicates the location of channels related to initial access so that UE can decode the right set of resources in time and frequency domain. It also informs UE about the different timers defined in the network to maintain radio link. SIB 3,4,5,6,7 includes the criteria defined in the network when to move from serving cell to neighbouring cell either in the same or different technologies. • Many companies conduct these tests for benchmarking purposes too.

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