Patent ID: 8891394
Filing Date: 2014-11-18
Classification: H04L,H04W

Abstract:
1. A method for performing, by a user equipment (UE), a cell measurement in a mobile communication system, the method comprising: receiving, from a network, measurement configuration information including a reporting criterion which triggers the user equipment to transmit a measurement report message; performing, by the user equipment (UE), cell measurement according to the received measurement configuration information; reporting the measurement report message including a result of the cell measurement to the network when the reporting criterion of a first event has been configured and the result of the cell measurement satisfies the reporting criterion of the first event in which a measurement of a serving cell becomes better than a first threshold; reporting the measurement report message including a result of the cell measurement to the network when the reporting criterion of a second event has been configured and the result of the cell measurement satisfies the reporting criterion of the second event in which the measurement of the serving cell becomes worse than a second threshold; reporting the measurement report message including a result of the cell measurement to the network when the reporting criterion of a third event has been configured and the result of the cell measurement satisfies the reporting criterion of the third event in which a measurement of a neighboring cell becomes offset better than the serving cell; reporting the measurement report message including a result of the cell measurement to the network when the reporting criterion of a fourth event has been configured and the result of the cell measurement satisfies the reporting criterion of the fourth event in which the measurement of the neighboring cell becomes offset better than a third threshold; and reporting the measurement report message including a result of the cell measurement to the network when the reporting criterion of a fifth event has been configured and the result of the cell measurement satisfies the reporting criterion of the fifth event in which the measurement of the serving cell becomes worse than a forth threshold and the measurement of the neighboring cell becomes better than a fifth threshold, wherein if a plurality of serving cells including a primary cell (PCell) and at least one secondary cell (SCell) are configured in the user equipment (UE), the serving cell for the third event and the serving cell for the fifth event are each a PCell among the plurality of serving cells, and the measurement report message includes a measurement of the SCell and a cell identifier of the SCell.