MOBILE COMPUTING(HANDOFF)

HANDOFF IS OCCURED WHEN YOU ATTEND A CALL WHILE MOVING FROM ONE BASE STATION TO ANOTHER BASE STATION  (ONE AREA TO ANOTHER SUDDENLY SIGNAL GOT REDUCED   IF ANY ONE NOTICITED? 

FOR EXAMPLE IF  YOU ARE TRAVELLING IN A CAR YOU ARE MOVING WHEN YOU CAME END OF PARTICULAR BASE STATION IT MAY  REDUCE AND AGAIN IF WE ENTER THE BOUNDARY OTHER BASE STATION THE  SIGNAL WILL BE FULL WITHOUT GETTING CALL BREAKAGE THIS PROCESS IS HANDOFF