Call failure caused by forward and reverse imbalance

Typical case:
MS received power and strongest pilot Ec/Io maintain in good state, such as Rx Power>-100dBm, Ec/Io>-15dB;
After MS origination, reverse Tx power is increasing continuously, until 23dBm, but access is failed;
After access failure, MS will stay in previous pilot;
When MS is nearer to BTS, MS call can be successful. Observe Tx_Adj, it is a positive value. (Note: only when MS acquires F-TCH and reverse closed-loop power control starts working, Tx_Adj value will be efficient)

Analyzing:
In the above case, MS Rx power and pilot Ec/Io are all good, and this means the forward link is good. But in MS origination procedure MS is increasing transmitting power until maximum, and this means the reverse link is bad.

That is forward and reverse imbalance. Tx_Adj>0 also means forward is better than reverse.
Because forward is better than reverse, so in the edge of coverage BTS can not receive the signal from MS correctly and call is failed.

Optimization method:
Find the rootstock of imbalance:
Judge if the cell power configuration is too high:
Judge if the pilot gain is too high:
Judge if there is reverse interference;