Abstract: A method for sensing detachment of a external battery in a portable terminal including a connector with which the external battery is detachably assembled includes determining that the external battery is assembled with the connector when an output voltage is observed, connecting the connector and an internal battery of the portable terminal to supply power from the external battery to the internal battery, disconnecting the connector from the internal battery to check an output voltage of the connector, and determining that the external battery has been detached from the connector when an output voltage is not observed.

Abstract: Disclosed is a method for measuring a battery charge level of a portable terminal having a removable back-up battery. The method includes determining that the back-up battery is connected in parallel to an main battery of the portable terminal, disconnecting the main battery from the back-up battery for a period of time in a cycle, and checking voltage levels of the main battery and the back-up battery to measure a charge level of each battery while the batteries are disconnected.

Abstract: A method for soft-combining MBMS (Multimedia Broadcast/Multicast Service) data in an asynchronous mobile communication system including a user equipment (UE) and a radio network controller (RNC), wherein the system provides an MBMS service. In the method, the RNC measures a round trip delay (RTD) for a primary cell in which the UE is located, and an RTD for each of the neighbor cells neighboring the primary cell. The RNC transmits the MBMS data at the same transmission time by considering the RTDs for the primary cell and the neighbor cells so that the UE can receive requested MBMS data. The UE receives MBMS data transmitted from the respective cells at the same transmission time, and performs soft combining on the received MBMS data.

Abstract: An outer loop power control apparatus and method in a mobile communication system are disclosed. If a first received frame has no errors and the raw BER of the first received frame is equal to or greater than a predetermined raw BER, a power control mode is changed to an adjustment mode. If a second received frame following the first received frame has no errors and the raw BER of the second received frame is less than the threshold raw BER in the adjustment mode, a target Eb/No is decreased by a product of a first step coefficient and a decrement unit. If the raw BER of the second received frame is equal to or greater than the threshold raw BER, the raw BERs of the first and second received frames are compared. If the raw BER of the second received frame is less than the raw BER of the first received frame, the target Eb/No is decreased by a product of a second step coefficient and the decrement unit.

Abstract: Disclosed herein is an apparatus for measuring adhesive and frictional properties of a polymer hemisphere relative to a contact plate provided in the apparatus. The apparatus comprise a body having a movable table installed to move along an X-axis and Y-axis and a vertical column positioned at a rear side of the movable table, a sample mount provided on the movable table and having a mirror to reflect surface images of a horizontal contact plate, a head assembly located at a front side of the column and having a polymer hemisphere used to press a surface of the contact plate to implement an adhesive force test, a camera device located at a front side of the mirror to capture the surface images of the contact plate during the adhesive force test, and a control device for analyzing various data inputted thereto during the adhesive force test.

Abstract: A mobile communication terminal and a control method thereof are provided, where a plurality of antennas receives signals from systems having different frequency bands and a plurality of system modems communicates with the systems having the different frequency bands, respectively. A switching unit positioned between the plurality of antennas and the plurality of system modems selectively connects the plurality of antennas with the plurality of system modems. In a handover between the systems having the different frequency bands, a controller controls the switching unit to connect the system modem of a handed-over system to a predetermined one of the plurality of antennas.

Abstract: Disclosed is a method for controlling activation/deactivation of two kinds of operation modes of an MMMB mobile terminal during handover between different types of systems. To control the activation/deactivation, a system controller instructs the mobile terminal to activate/deactivate the operation modes or provides activation/deactivation conditions to the mobile terminal. In particular, when the mobile terminal in communication is situated in a border cell neighboring a target system, the mobile terminal activates target system-related modules and then performs handover into the target system according to predetermined conditions after the passage of a predetermined time period. Such a handover method minimizes time required for performing handover, prevents deterioration of call quality during the handover, and saves power consumption of the mobile terminal.

Abstract: A method for soft-combining MBMS (Multimedia Broadcast/Multicast Service) data in an asynchronous mobile communication system including a user equipment (UE) and a radio network controller (RNC), wherein the system provides an MBMS service. In the method, the RNC measures a round trip delay (RTD) for a primary cell in which the UE is located, and an RTD for each of the neighbor cells neighboring the primary cell. The RNC transmits the MBMS data at the same transmission time by considering the RTDs for the primary cell and the neighbor cells so that the UE can receive requested MBMS data. The UE receives MBMS data transmitted from the respective cells at the same transmission time, and performs soft combining on the received MBMS data.

Abstract: A mobile terminal identifies a cell boundary of a mobile communication network supporting an asynchronous scheme for handover between different communication systems. For this, a boundary indication base station newly defines boundary indication codewords distinguished from existing codewords used for acquisition of frame synchronization, and transmits one of the boundary indication codewords over a secondary synchronization channel every frame. Upon receiving the boundary indication codeword over the secondary synchronization channel, the mobile terminal recognizes that it is located in a boundary of the mobile communication network supporting the asynchronous scheme, and performs handover to a mobile communication network supporting a synchronization scheme.

Abstract: A method of paging UEs(User Equipments) on a multimedia broadcast/multicast service (MBMS) service basis in a mobile communication system supporting MBMS. To receive a PCH (Paging Channel) using a plurality of PICHs (Paging Indicator Channels) in a mobile communication system having a plurality of PCHs transmitted in every predetermined periods, for paging UEs requesting a broadcasting service, and the plurality of PICHs transmitted between first and second successive PCHs among the plurality of PCHs. A UE receives a PICH assigned to the UE if the PICH is among the plurality of PIs, determines whether the second PCH corresponding to the broadcasting service will be transmitted by a broadcasting service PI set in an unused part of the received PICH, and receives the second PCH destined commonly for all UEs that determine that the second PCH will be transmitted to the UEs among UEs that receive the PICH.

Abstract: A call admission apparatus and method for guaranteeing a Quality of Service (QoS) in a mobile communication system are disclosed. Upon sensing a call admission request for a new call, a minimum transmit power required to maintain the QoS of each call in service is detected. Only if the sum of the minimum transmit powers of calls in service is less than an optimum transmit power is the call admitted. Therefore, efficient use of transmit power resources is increased.

Abstract: A system and method for providing a packet service to a user equipment (UE) when the UE moves to a second cell managed by a second radio network controller (RNC), the UE requesting a permission to receive the packet service in a first cell managed by the first RNC, in a mobile communication system providing the packet service. In the system and method, the first RNC transmits control information necessary for providing the packet service to the UE, to the second RNC. The second RNC analyzes the control information and notifies the first RNC that the second RNC is providing the packet service, when the second RNC can provide the packet service. The second RNC transmits packet service data to the UE.

Abstract: An outer loop power control apparatus and method in a mobile communication system are disclosed. If a first received frame has no errors and the raw BER of the first received frame is equal to or greater than a predetermined raw BER, a power control mode is changed to an adjustment mode. If a second received frame following the first received frame has no errors and the raw BER of the second received frame is less than the threshold raw BER in the adjustment mode, a target Eb/No is decreased by a product of a first step coefficient and a decrement unit. If the raw BER of the second received frame is equal to or greater than the threshold raw BER, the raw BERs of the first and second received frames are compared. If the raw BER of the second received frame is less than the raw BER of the first received frame, the target Eb/No is decreased by a product of a second step coefficient and the decrement unit.