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Reply To: congestion SDCCH


I am getting high amount of drop calls in the tunnel where there are sectors pointing each other from each side of the tunnel.The circular polarized antenna with 16dBi gain, 28degree horizontal beamwidth is pointing toward the tunnel.Antennas are placed 1ft off of the tunnel wall.There are two lanes for vehicles moving in the same direction and the test drive shows totally different signal strength.Depending upon which lane we collect the TEMS data shows significant different in signal strength.The sector has only 2 radios. second radio is hopping and we tried to make hopping off and even tried blocking the second radio and drove only with BSCCH radio with handoff parameter change but the site is popping up in worst performer list? Appreciate for your input.we had over 200ft cable run and we do have TMAs and the path balance is few dB hot in uplink already..any suggestion what we should look to fix very low retainability?? Thanks