RTWP CHECKPROBLEMPROBLEM INDICATORSYMPTOMSYMPTOM INDICATORTROUBLESHOOTINGSOLUTIONHardware issuesConsistently high RTWP that doesnt subside even at night, affects few sites, no clusteringFaulty RRUnot all cells of the same site affected, but all cells of the same RRU are affected from the antenna ports, connect the jumper cable of another cell of the same site that is not affected by the RTWP to the suspected RRU, high RTWP appears on that cell during a trace then RRU is badchange RRUFaulty boardsall cells affected of the nodeB are affectedDisconnect fiber connector at nodeB base, if RTWP is still high then its a board issuechange boardFaulty connectorsVSWR on affected cell1. from the RRU ports, connect the fiber cable of another cell of the same site that is not affected by the RTWP to the suspected RRU, if high RTWP disappears on that cell during a trace then connectors/fiber/filters are bad 2. tap on the connectors during a trace, if RTWP jumps then faulty connector is a suspecttighten connectorsFaulty cablesVSWR on affected cell from the RRU ports, connect the fiber cable of another cell of the same site that is not affected by the RTWP to the suspected RRU, if high RTWP disappears on that cell during a trace then connectors/fiber/filters are badchange cablesFaulty filters1. from the RRU ports, connect the fiber cable of another cell of the same site that is not affected by the RTWP to the suspected RRU, if high RTWP disappears on that cell during a trace then connectors/fiber/filters are bad 2. 2. tap on the filters during a trace, if RTWP jumps then faulty filter is a suspectchange filtersExternal interferenceConsistently high RTWP that doesnt subside even at night, several cells in a cluster are affected, more than 3db difference between RTWP in main antenna branch and diversity antenna branch during a traceuse of signal jamersperiodic in nature (occurs between certain times), its mobile and affects different cells at a timeperform outdoor RF scan to locate interference sourceReport to operatorradio stationsit affetcs a constant set of cells in an areaperform outdoor RF scan to locate interference sourceReport to operatorhigh UL traffic loadhigh RTWP occurs during the cell peak load period (eg during the day, during BH etc) but disappears during off peak (eg night time) periods, the RTWP does not rise up to -90, if more tnan -90 (eg -80, -70 etc) then suspect external interference or hardware issuestoo many UL users in the cell coverage1. check cell UL traffic trend if it is experiencing a surge. 2. check trend of number of DCH and HSUPA users in the cell, if more than 35 then high RTWP can occur. 3. check if an event is occuring in the cells coverage. 4. check availability of neighboring cells if its degraded. 5. check if there is an increase in the number of RRC attempts1. restore the availability of neighboring cells 2. carry out traffic balancing between neighboring cells 3. reduce power ramp step and initial access power parameters of the cell 4. carry out physical optimization i.e downtilt the cell