Samsung Electronics Co., Ltd.

Yong-Duk Cho

Ki-Hyun Do

Jin-Young Oh

Tu K Nguyen

Jong-Han Kim

Jeong-Gyun Yu

Disclosed is a method for controlling a security mode by a user equipment (UE) in a wireless communication system, including performing a camp-on process and a cell update process with a network when an out-of-service (OOS) situation has occurred, receiving one of a signaling connection release (SCR) message and a first protocol data unit (PDU) which corresponds to the SCR message from the network, receiving a security mode command (SMC) message from the network if the SCR message is received, performing an integrity process on the SCR message using an old security configuration, and performing a rollback process to discard a new security configuration included in the SMC message if a result of the integrity process result an integrity check success, and updating a security configuration to the old security configuration.

Apparatus and method for controlling security mode in wireless communication system

A method of reducing power consumption is provided. The method includes categorizing a plurality of cells including a serving cell into an identified cell set and a non-identified cell set based on received power of the plurality of cells, measuring received power of the plurality of cells including the serving cell based on a first measurement period during a first time interval, determining whether received power of the serving cell is greater than a predefined threshold or whether a number of cells included in the identified cell set or a configuration of the plurality of cells changes, or if one of the received power of the serving cell is greater than the predefined threshold and if the number of cells included in the identified cell set or the configuration of the plurality of cells does not change, changing the first measurement period to a second measurement period.

Method of reducing consumption of standby current in a mobile terminal

Methods and apparatuses are provided for cell reselection at a mobile terminal. A first cell measurement is performed with respect to a serving cell and a first set of one or more cells included in a neighbor cell list. A second cell measurement is performed to detect a second set of one or more cells that are not included in the neighbor cell list, based on the first cell measurement. One or more candidate cells that satisfy cell reselection criteria are determined from among the first set of one or more cells and the second set of one or more cells. One of the one or more candidate cells is reselected.

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Seoul, South Korea

Yong-Duk Cho