Abstract: A method for receiving a service by a user equipment (UE) is provided. The method includes transmitting an attach request message to a network, upon detection of entry into an area of a non-legacy mobile communication system, receiving an attach accept message from the network including information indicating whether the network supports VoIP or CSFB and receiving voice service by the VoIP or the CSFB through the non-legacy mobile communication system if the information included in the attach accept message indicates that the network supports the VoIP or the CSFB.

Abstract: A method and apparatus supports Inter-Radio Access Technology (IRAT) Packet Switch (PS) handover during a simultaneous voice and data (SVD) mode in a mobile station that supports a Radio Access Technology (RAT). The method includes determining a state in which a data call is connected through a first system and a voice call is connected through a second system. The MS determines whether handover to the second system should be performed for the data call. A measurement report message that indicates a set of active base stations (BSs) of voice call connection in the second system is generated. And the measurement report message is transmitted to a serving BS of the data call connection in the first system.

Abstract: A mobile terminal includes an apparatus configured to perform a method for inter-Radio Access Technology (RAT) measurement. When a measurement condition is satisfied, the apparatus turns on, at an operating module, a standby module and generates a time latch signal to the standby module at a time T0. The apparatus also latches, at the standby module, a time according to the time latch signal and reports the latched time value to the operating module. At the operating module, a measurement request message is sent. The measurement request message includes measurement parameter information and offset information between the time T0 and antenna switching times T2 and T5 to the standby module. The apparatus sets, at the standby module, a time interrupt using the information of the measurement message and performing inter-RAT measurement according to the time interrupt.

Abstract: A method in an electronic device, comprises, in response to an Internet Protocol (IP) voice packetized data call being performed in a first call session of a first communication processor and occurrence of a handover event from the first communication processor to a second communication processor, receiving at least one of, (a) a control message and (b) IP packetized voice data, via the second communication processor. The control message received from the second communication processor is forwarded to the first communication processor.

Abstract: An electronic device and method for the electronic device to process data are provided. The method includes retrieving information associated with at least one neighboring terminal, requesting, when the loss of data transmitted to a plurality of electronic devices is determined, transmission of the data of which a loss is determined, from the at least one neighboring terminal, based on the retrieved information associated with the at least one neighboring terminal and receiving the data of which the loss is determined, in response to the request.

Abstract: A method for a connection mode terminal to hand over between a home cell and a public cell in a mobile communication system is provided. In the mobile communication system including the home cell and the public cell, a region of the terminal is determined and a random access channel for the handover is pre-allocated. When the normal handover from the home cell to the public cell fails, the access to the public cell is accomplished using the pre-allocated random access channel. Therefore, the handover failure rate can be lowered.

Abstract: The time required to set up a voice call in an exemplary embodiment, in which Circuit Switched Fallback (CSFB) is used, is reduced to provide a voice call service to a User Equipment (UE) in a Long Term Evolution (LTE) system. If a voice call occurs in a UE while the UE accesses the LTE system, the UE using CSFB switches to a 2G/3G legacy system, recycles system information for a 2G/3G cell that the UE has accessed before, and immediately proceeds with voice call setup without receiving system information unnecessary for a CSFB process.

Abstract: A communication method of an electronic device is provided. The method includes receiving, by a first communication module supporting a first network, a measurement message for a second network, providing the received measurement message to a second communication module supporting the second network, providing, by the second communication module, information on the second network to the first communication module in response to the measurement message, and reporting, by the first communication module, the information to the first network in order for a handover to the second network.

Abstract: Methods and devices are provided for operating a communication service. A communication control module of the electronic device transmits information related to operation of a circuit switching service to a network device supporting a packet switching service through a communication interface. The communication control module switches radio resources of the communication interface between the packet switching service and the circuit switching service based on the information related to the operation of the circuit switching service. The information related to the operation of the circuit switching service is transmitted to the network device via a communication system module related to the packet switching service.

Abstract: Methods and devices are provided in which a voice call is made during data transmission and reception to and from an external electronic device. It is determined whether a communication status is sufficient to perform the data transmission and reception while making the voice call. The data transmission and reception is stopped if it is determined that the communication status is not sufficient to perform the data transmission and reception while making the voice call.

Abstract: The time required to set up a voice call in an exemplary embodiment, in which Circuit Switched Fallback (CSFB) is used, is reduced to provide a voice call service to a User Equipment (UE) in a Long Term Evolution (LTE) system. If a voice call occurs in a UE while the UE accesses the LTE system, the UE using CSFB switches to a 2G/3G legacy system, recycles system information for a 2G/3G cell that the UE has accessed before, and immediately proceeds with voice call setup without receiving system information unnecessary for a CSFB process.

Abstract: A position associated information providing method, implemented by an electronic device supporting the same, includes identifying a condition of position information set to an application running or execution-requested, obtaining position information corresponding to the identified condition of the position information, and providing the obtained position information to the application.

Abstract: An apparatus that uses a method for processing handover by a terminal linked to a wireless network included in heterogeneous wireless networks and conducting a voice call service is provided. The method includes determining whether the terminal is required to perform handover of another wireless network included in the heterogeneous wireless networks, and upon determining that the handover is required, performing handover to the another wireless network, wherein the handover is determined by applying at least one handover condition to each of predetermined operation modes in the terminal conducting the voice call service.

Abstract: An apparatus and a method for providing call continuity in a wireless communication system are provided. The apparatus includes a first communication unit for setting a call with a counterpart terminal in a first network, a second communication unit for setting a call with the counterpart terminal in a second network while the call is set in the first network, and a control unit for terminating the call of the first network after the call setup is completed in the second network.

Abstract: The present invention relates to a mobile communication system, and in particular, to a method and apparatus for transmitting and receiving a PDU including an Extension Bit field and a Length Indicator field in a UE or a Node B. A method for transmitting a PDU generated with more than two SDUs and a header having information on each SDU in a transmitter of a mobile communication system is provided. The method includes generating, in the header, a Length Indicator (LI) indicating an end point of each of remaining SDUs except for the last SDU and an Extension Bit indicating the presence/absence of another LI after each LI, and generating the header so that the LI succeeds the Extension Bit associated therewith; generating the PDU with the generated header and the SDUs; and transmitting the PDU.

Abstract: An apparatus and a method for providing a voice communication service using a Long Term Evolution (LTE) network in an electronic device are provided. A method includes providing a first Voice over LTE (VoLTE) service in a first LTE area, handing over to a second LTE area during the first VoLTE service, when the first VoLTE service ends, determining whether the second LTE area provides a VoLTE service, and when the second VoLTE area does not provide the VoLTE service, limiting the VoLTE service of the electronic device.

Abstract: Methods and apparatuses are provided for transmitting and receiving a Packet Data Unit (PDU) in a mobile communication system. The PDU, including a header and at least one data field, is generated. The PDU is transmitted. The header includes a length indicator (LI) field and an extension bit field. The LI field indicates a length of a corresponding data field. The extension bit field indicates whether a data field follows or a set of an extension bit field and an LI field follows. The extension bit field is placed prior to the LI field in the set of the extension bit field and the LI field. An LI field is present for every data field except a last data field.

Abstract: An apparatus and a method for providing call continuity in a wireless communication system are provided. The apparatus includes a first communication unit for setting a call with a counterpart terminal in a first network, a second communication unit for setting a call with the counterpart terminal in a second network while the call is set in the first network, and a control unit for terminating the call of the first network after the call setup is completed in the second network.

Abstract: A method in an electronic device, comprises, in response to an Internet Protocol (IP) voice packetized data call being performed in a first call session of a first communication processor and occurrence of a handover event from the first communication processor to a second communication processor, receiving at least one of, (a) a control message and (b) IP packetized voice data, via the second communication processor. The control message received from the second communication processor is forwarded to the first communication processor.

Abstract: A circuit for processing data is provided. The circuit includes an Application Processor (AP), a Communication Processor (CP), and a storage unit including at least a first region which the AP and the CP access and from/to which data related to at least one of the AP and the CP is read/written, and a second region which the CP accesses and from/to which data related to the CP is read/written.