3G/UMTS

 

 

 

 

Time Domain Power Snapshots during WCDMA Call Setup

 

These snapshot is for Uplink only. No Downlink is shown here.

 

< Step 1 > When you turn on the power, if UE properly detected a cell and the cell is 'suitable cell', UE initial RACH procedure as shown below.

 

 

 

< Step 2 > Once RACH process is complete, UE and NodeB exchanges signaling message for registration. During this period, you may some power changes based on TPC commands from eNodeB but this TPC process is not necessarily happen everytime.

 

 

 

< Step 3 > Following shows the power profile changes around the end of registration.

 

 

 

< Step 4 > If you make a call in the idle mode, you would see RACH power as you saw in step 1.

 

 

 

< Step 5 > Following is an example of power profile during voice call.