Samsung Electronics Co., Ltd.

Yu-Shin Kim

Dong-Won Ryu

Yong-Suk Moon

Joo-Hyun Lee

Hye-Jeong Kim

Noh-Sun Kim

Ravikumar Kalaimani

Kyoung-Ho Lee

Hyeong-Su Lee

Gwan-Gyu Seo

Goli Naga Santha Mohan Rao

Keon-Young Lee

Ranganadh Karella

Jang-Ki Min

Bhishma V

Karella Ranganadh

A method for communicating by an electronic device is provided. The method includes acquiring a value indicating a signal quality of a first network that provides a packet data based call service, when the acquired value satisfies a first condition, receiving a call or transmitting a call request through a second network that provides a circuit-switching based call service, and, when the acquired value satisfies a second condition, receiving a call or transmitting a call request through the first network.

Communication method and electronic device

A method for selecting a cell by an electronic device including a plurality of antennas includes obtaining first received power-related information for a reference signal received from a first cell of a first network through a first antenna of the plurality of antennas configured to transmit and receive signals, determining whether the first received power-related information meets a preset first condition, and when the first received power-related information meets the first condition, forming a connection with the first cell or transmitting at least a portion of the first received power-related information to the first cell or a second cell of the first network.

Cell selection method and electronic device

Provided are an apparatus and a method for reselecting a Public Land Mobile Network (PLMN) in a mobile communication terminal. The method includes requesting the updating of location registration to a target PLMN after storing current system information, determining whether a Subscriber Identify Module (SIM) card is valid when it fails to update the location registration, and resetting the SIM card to a previous state and then, reading the stored current system information to request the updating of location registration in the current PLMN when the SIM card is invalid.

Apparatus and method for reselecting a public land mobile network in a mobile communication terminal

Provided is an apparatus and method for preventing successive failures in a call connection in a mobile communication terminal. When a call connection is attempted, a cell with the highest RX power is selected among cells and an RRC Connection Request message is transmitted from the mobile terminal to a BS of the selected cell. It is determined whether the mobile terminal receives an RRC Connection Accept/Reject message from the BS. If the mobile terminal receives an RRC Connection Reject message from the BS of the selected cell, it is determined whether the selected cell is able to perform the RRC connection by detecting a Connection Reject message frequency that is the number of times of rejection of an RRC connection request for a predetermined period. If the selected cell is not able to perform the RRC connection, a neighboring cell is reselected and an RRC Connection Request message is transmitted to the reselected neighboring cell.

Apparatus and method for connecting call in mobile terminal

Provided is an apparatus and method for scanning a frequency in a mobile terminal. The apparatus includes a frequency scanner that detects an available frequency in such a manner that a Last-used frequency Band (LB) in which a last frequency used is included is first scanned when a frequency-scanning event is generated and thereafter the LB is periodically re-scanned while the entire frequency bands are scanned.

Apparatus and method for scanning frequency in mobile terminal

Provided is an apparatus and method for providing a call-processing service in a mobile terminal. The apparatus includes a circuit processor that provides a Circuit Service (CS), a packet processor that provides a Packet Service (PS), a period measuring unit that measures a delayed paging period in which a call-processing signal is detected while the PS is provided, and a monitoring unit that shifts the PS to a standby mode during the delayed paging period measured by the period measuring unit if the packet processor is in the process of receiving the PS, and controls the circuit process to provide the CS if the call-processing signal is received.

Apparatus and method for providing call-processing service in GSM/GPRS mobile terminal

A method and apparatus for managing neighbor cells of a mobile communication terminal is provided. In the method, when a neighbor cell list is received from a network, neighbor cells are scanned to select a number of neighbor cells having high received signal strength indicator (RSSI) levels. The selected neighbor cells are managed in a BA list. The BA list is divided into a number of groups according to the RSSI levels. Different minimum signal strengths are applied to the respective groups, and it is determined whether there are neighbor cells that do not satisfy the minimum signal strengths. When the neighbor cells that do not satisfy the minimum signal strengths, the corresponding neighbor cells are deleted from the BA list.

Method and apparatus for managing neighbor cells in mobile communication terminal

Provided is a method and apparatus for cell re-selection in a dual mode terminal supporting GSM and WCDMA. The method includes measuring a cell re-selection parameter for a WCDMA cell and a GSM cell when attempting a cell re-selection from the GSM cell to the WCDMA cell; determining an additional weight value for cell re-selection; and comparing the determined additional weight value and a cell re-selection threshold value and a weight value received from a network with the cell re-selection parameter.

Method and apparatus for cell re-selection in mobile terminal

A method of determining cell reselection in a mobile communication terminal and an apparatus therefor are provided. The method includes receiving system information to calculate a threshold value in consideration of channel quality, a cell reselection weight value, and a cell reselection reference value; and determining whether to perform cell reselection using the threshold value in consideration of the channel quality, the cell reselection weight value, and the cell reselection reference value in a specific wireless environment.

Method of determining cell reselection in mobile communication terminal and apparatus therefor

Provided is a method for preventing excessive handovers in a mobile communication system. In the method, a periodic measurement report message is transmitted from a mobile terminal to a network. The network determines, on the basis of the measurement report message from the mobile terminal, whether a handover of the mobile terminal needs to be performed. Thereafter, the network transmits a Handover_Command message to the mobile terminal if the handover of the mobile terminal needs to be performed. Upon receipt of the Handover_Command message, the mobile terminal performs a handover to a target handover cell according to the Handover_Command message, transmits a Handover_Complete message to the network, and transmits a first measurement report message including neighboring cell information set to Null from the mobile terminal to the network after the transmission of the Handover_Complete message.

Method and apparatus for preventing excessive handovers in mobile communication system

Disclosed is a method for handling inter-RAT cell measurement in a dual-mode UE in a connected mode, which supports both GSM/GPRS (Global System for Mobile communication/General Packet Radio Service) RAT (Radio Access Technology) and UMTS (Universal Mobile Telecommunications System) RAT. A UTRAN (UMTS Terrestrial Radio Access Network) of the UMTS RAT transmits a measurement control message to a URRC (UMTS Radio Resource Control) of a UMTS network layer in the UE. Upon receiving the measurement control message, the URRC sends a measurement request for GSM cells to an RR/GRR (Radio Resource/GPRS Radio Resource) of a GSM/GPRS network layer. The RR/GRR activates a GSM physical layer and sends a measurement request for the GSM cells to the GSM physical layer. The GSM physical layer performs measurement on the GSM cells and reports a measurement value to the RR/GRR. The RR/GRR reports the measurement value for GSM cells, received from the GSM physical layer, to the URRC. The URRC reports the received measurement value for GSM cells to the UTRAN.

Growing community of inventors

Osan-si, South Korea

Yu-Shin Kim