LTE DT Parameters By : Amir Hesham RF Engineer Actel Communication 01003864143 Ameer.hesham@actel.com.eg LTE Vs 3G DT 3G LTE UTRAN E-UTRA RSCP RSRP ECNO RSRQ SC PCI CQI CQI SNR SINR CPICH Power RS Power LAC TAC LTE Parameters 1. 2. 3. 4. 5. 6. 7. 8. 9. RSRP – Reference Signal Received Power RSRQ – Reference Signal Received Quality RSSI – Reference Symbol Signal Intensity SINR – Signal to Interference Noise Ratio CQI – Channel Quality Index PCI – Physical Cell Identity BLER – Block Error Rate DL Throughput UL Throughput RSRP – Reference Signal Received Power • Value : > -44 dbm > RSRP = RSSI - 10 log ( N * 12 ) , N : is No# of resource block ( RB ) -140 dbm RSRQ – Reference Signal Received Quality • Value : -3dbm -19.5dbm • Quality of signal RSRQ = RSRP / ( RSSI / N ) , N : is No# of resource block ( RB ) So RSRP RSRQ RSSI More degrading in RSSI , low RSRQ RSSI : intara cell power including interference and noise RSSI – Reference Symbol Signal Intensity • Contains : Noise + source power + interference power • RSSI = 12 * N * RSRP SINR – Signal to Interference Noise Ratio • SINR= S / ( I + N ) s:average received signal power , I:average received interference , N:average received noise CQI – Channel Quality Index • Value : 1 15 bad good • Quality of channel downlink • Depends on good radio condition , in dedicated mode only PCI – Physical Cell Identity • PCI = PSS + 3* SSS PSS : Primary Synchronization Symbol values : 0 , 1 , 2 (3 no#) SSS : Secondary synchronization Symbol values : 0 to 167 (168 no# ) BLER – Block Error Rate • BLER = Total Error Blocks / Total Blocks Tx • BLER < 10% LTE DT Test DL Throughput UL Coverage Terminated Voice Calls Originated CS full Back Handover Terminated Video Calls Originated Terminated SMS Originated Cell Reselection TEMS General windows for tems LTE Serving Cell • CI = PCI • CI ( Group ) = SSS • CI( cell ) = PSS LTE Radio parameters & serving cell Throughput TEST CS Full-Back TEST Cell Re-selection to LTE TEST LTE VS LTE Hand-Over THANK YOU Amir Hesham RF Engineer Actel Communication 01003864143 Ameer.hesham@actel.com.eg