Timing advance

Timing advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advanceTiming advance