Whats is Uplink RSSI in LTE?
Uplink RSSI is referred as the uplink Received Signal Strength Indicator of the totalwideband received power within the entire channel bandwidth. Having too low or toohigh UL RSSI will contribute to poor quality in the network. Too Too low RSSI could siplyean the cell is !deaf" and cannot !listen" to any U#. $ossible reasons arecoponents failure% incorrect paraeter settings% incorrect equipent installation% etc.&n the other hand% too high RSSI is equally undesirable. This case is ore often seen.'ue to the high noise interference% it could likely lead to frequent drop calls% call c all setupfailure and poor voice quality. (ells with UL RSSI ) *+, d- can be considered ashaving high UL interference.
There are no strict thresholds which would differentiate between quality service and definite KPI degradation, but based on experience and cases that have been investigated it has been established that whenever wheneve r the UL RI for any cell !""# d$%, it get prone to KPI degradation,, pri%arily affects dropped calls& degradation
Tips to solve this:
I have experienced a small cluster of area got inteferred by RF signal jammer from a prison. All 3G/G net!or" providers to su#er from it.
$specially on 3G !here I am !or"ing on% the indication of having too high &' R((I level and poort retainabilities )mainly* rates have been observed% beside RR+. the follo!ings are my !or"around !hich give me nothing to recover the performances, - change the &ARF+ to another value )the operator has more than carrier* --0 no impact - reduce the idle and dedicated coverage by means of p-cpich% 1rxlev% 11ualmin% minp!rmax% interp!rmax% maxp!rmax --0 no impact - increasing minp!rrl --0 no impact - do!ntilting the antenna --0 no impact
nd 2uite an interesting problem. ammers are fairly simple devices but as you are 4nding out they can cause big problems. 5hey usually cover the !hole band e.g 66 789% :667h9% ;667h9 !hich explains !hy changing the &ARF+ didn
ou can also limit the max po!er &$s can transmit as !ell )usually this is set to d?m*. @epending on your vendor you might be able to apply these changes on a per cell basis !hich !ill be ideal as you don
3rd ppreciate in your thought. Regarding the R(H related paraeters% i have far earlier configured the utrancell settings to follow the recoended ones/ a0$reable(ycle 12 power&ffset$, 3
power&ffset$p *4 preableRetrans5a0 12 preableSignatures 67717 that would I believe akes the Ue slowly power up during access attepts. However I also agree w8 you to liit the Ue T0power upto certain level eventhough the highness of UL RSSI 9on node -: a;ority contributed by the . I a sure this will not help in anyway the signals fro the ;aers..but you should see a decent iproveent in accessibility. s the previous poster had entioned% ake sure that
