Here is basic LTE UL power control process, it is really like 3G WCDMA UL power control,
It also contains outer-loop and inner-loop power control:
1. Set UL BLER Target(1--100%);
2. Calculate UL SINR per TTI(1ms);
3. Compare UL SINR with SINR target;
4. If UL SINR<SINR target, Tell UE to increase transmission power by TPC command in PDCCH;
5. If UL SINR>SINR target, Tell UE to decrease transmission power by TPC command in PDCCH;
6. Calculate UL BLER based on HARQ ACK/NACK;
7. If UL BLER > BLER target, update/increase SINR target;
8. If UL BLER < BLER target, update/decrease SINR target;