Patent ID: 9253738
Filing Date: 2016-02-02
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A radio link control method of a terminal for a cellular radio communication system supporting carrier aggregation, comprising: measuring radio link qualities of more than one component carrier included in configured component carriers; applying a weight to each component carrier included in the configured component carrier; calculating radio link quality values by applying the weight for each of the more than one component carrier included in the configured component carriers to the radio link qualities; determining whether at least one radio link quality value is equal to or greater than a threshold value; determining, when at least one radio link quality value is equal to or greater than the threshold and at least one of the measured radio link qualities is less than the threshold, that a radio link quality of the configured component carriers is good; maintaining, when the radio link quality of the configured component carriers is good, a connection state with a current base station; determining, when each radio link quality value of all the component carriers included in configured component carriers is less than the threshold value, that the radio link quality of the configured component carriers is bad; and releasing, when the radio link quality of the configured component carriers is bad, the connection state with the current base station, wherein the weight is determined based on at least whether the component carrier is an anchor carrier or whether the component carrier carries a physical control channel for the terminal.