دانلود SINR, RSRP, RSSI AND RSRQ MEASUREMENTS IN LONG TERM EVOLUTION NETWORKS

Abstract

The four basic Radio Resource Management (RRM) measurements in  Long Term Evolution (LTE)  system are  Channel  Quality  Indicator  (CQI),  Reference  Signal  Received  Power  (RSRP),  Reference  Signal Received  Quality  (RSRQ),  and  Carrier  Received  Signal  Strength  Indicator  (RSSI).  A  measurement  of channel  quality  represented  by  Signal  to  Interference  plus  Noise  Ratio  (SINR)  is  used  for  link  adaptation along with packet scheduling, whereas RSRP and RSRQ  are needed for making handover decision  during intra-eUTRAN  (evolved  Universal  Terrestrial  Random Access  Network)  handover  in  LTE.  In  this  paper, some  practical  measurement  results  recorded  from  a live  LTE  network  of  Australia  using  a  commercial measurement  tool  namely  NEMO  Handy  are  analysed  to verify  the  possible  relationships  among  SINR, RSRP,  RSSI  and  RSRQ  as  well  as  to  evaluate  the  effects  of  SNR  on  throughput.  In  addition,  the  intra-eUTRAN  handover  events  occurred  during  the  test  period  within  the  test  area  are  studied.  The  analysis yields  some  useful  information  such  as:  if  the  SINR  is  good  for  a  measurement  slot,  higher  throughput is achieved; RSRP and SNR are proportional to each  other on average; and lesser is the difference between RSSI and RSRP, better is the RSRQ – each of which is consistent with theory. All the measurement results are evaluated using computer programs built on MATLAB platform.