Samsung Electronics Co., Ltd.

Beom-Yong Lee

Joo-Hyun Lee

Yong-Suk Moon

Chang-Ho Sohn

A cell reselection method and apparatus for a packet data service in a mobile communication terminal are provided. The cell reselection method for the packet data service in the mobile communication terminal includes if a Circuit Switch (CS) call ends, determining whether the ended call is a CS fallback call, if it is determined that the ended call is the CS fallback call, determining whether an accessible Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) cell exists by measuring signals received from neighbor cells, and reselecting the accessible E-UTRAN cell.

Cell reselection method and apparatus for packet data service in a mobile communication terminal

An apparatus and method for supporting a Subscriber Identity Module (SIM) card in a mobile communication terminal including a plurality of modems are provided. The apparatus includes the SIM card for storing user information, and the plurality of modems each for providing a clock and for transmitting/receiving a signal by an independent interface with respect to the SIM card. Only a first modem of the plurality of modems controls a reset of the SIM card.

Apparatus and method for supporting SIM card in mobile communication terminal having multiple modems

Provided is a method for measuring a neighbor cell signal in a portable terminal includes acquiring a minimum required quality level value and a threshold for an intra-frequency measurement from received system information; calculating a measured cell quality value after the acquiring step; and commencing a neighbor cell signal measurement for an intra-frequency cell reselection when a value acquired by subtracting the minimum required quality level value from the measured cell quality value is less than or equal to a value acquired by adding the threshold and a certain signal strength value over a certain time. In the neighbor cell signal measurement for the cell reselection, the unnecessary neighbor cell signal measurement can be avoided to reduce the power consumption and extend the battery lifetime.

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Yongin-si, South Korea

Beom-Yong Lee