The invention discloses a method for a cellular system with a first node which controls traffic to and from users in a cell. The incremental offset measuring instrument includes a main base; a specimen seat mounted on the main base for resting a specimen; a measuring tool assembly for measuring the specimen; and a movable assembly mounted on the main base, wherein the movable assembly carries the measuring tool assembly, thereby achieving the goal of measuring the specimen. The method of link prediction comprises constructing the temporal projection graph, identifying the potential transitions for the unhappened event at a target time, assigning the potential transition weights according to a second predetermined rule, summing the potential transition weights to obtain the scores, and ranking the scores of the link prediction. This is achieved so that the mobile node does not reject incoming frames received from two logical link layer entities having different states.