Device and Method of Handling a Cell Selection Procedure or a Cell Reselection Procedure

A communication device for handling a cell selection procedure or a cell reselection procedure, comprising:

• a storage device;
• and
• a processing circuit, coupled to the storage device, wherein the storage device stores, and the processing circuit is configured to execute instructions of:
• measuring a plurality of power values corresponding to a plurality of beams of a cell;
• determining a cell quality value according to an average of the plurality of power values;
• determining a threshold value according to a number of the plurality of beams corresponding to the plurality of power values;
• performing a comparison of the cell quality value and the threshold value;
• and
• performing the cell selection procedure to select the cell or performing the reselection procedure to reselect the cell, when the comparison is that the cell quality value is greater than the threshold value.