Abstract: A communication system and data transmission method thereof are provided. The method includes adding an end marker to the end of source data and transmitting the source data and the end marker for a Packet data network GateWay (PGW) to a source evolved Node B (eNB) if a handover is carried out from the source eNB to a target eNB while the PGW is transmitting the source data to the source eNB, forwarding the source data and the end marker from the source eNB to the target eNB, transmitting target data immediately following the source data from the PGW to the target eNB, and transmitting the source data and the target data, which is classified into the source data by the end marker and immediately follows the end of the source data, from the target eNB to user equipment.

Abstract: A redirection method of a femto cell is provided together with a communication system based thereon. A serving gateway, connected with a specific femto cell, or an additional server determines whether there is a need for a redirection of the femto cell by using a load condition of the serving gateway or a target gateway. If the redirection is determined, the femto cell receives redirection instructions from the serving gateway to the target gateway and then the redirection is performed. Since the femto cell is redirected from the overloaded femto gateway to another femto gateway, the femto cell can continuously provide a communication service to user terminals.

Abstract: A method and apparatus are provided for handing over from a Long Term Evolution (LTE) network to a Circuit Switching (CS) network by a call manager in a wireless communication system. The method includes receiving, from an Enhanced Node B (ENB) of the LTE network, a handover required message for a Packet Switching (PS) to CS handover from the LTE network to the CS network, when the PS to CS handover is decided based on measurement reports of a User Equipment (UE); sending, to a Mobile Switching Center (MSC) of the CS network, a PS to CS handover request message including an International mobile subscriber identity (IMSI) for identifying the UE and a target IDentifier (ID) for a target cell of the CS network; receiving a PS to CS handover response message from the MSC; and sending, to the UE via the ENB, a handover command message.

Abstract: Disclosed is a method and system for mutually exchanging capability information of UEs for communication between a Circuit-Switched (CS) and IMS services (CSI) UE, which can use a CS call for voice communication while using an IMS session for PS service, and an IMS UE which uses an IMS session for both voice communication and PS service. A MGCF performs interworking of capability information between a CS message and an IMS message so that the IMS UE can process UE capability information through an IMS session request/response. When a call request message containing no capability information is created from a UE not supporting capability exchange, a CSI AS transfers the call request message to a peer UE after inserting estimable capability information of the UE into the call request message, and stores capability information of the counterpart UE for the UE.

Abstract: Provided is a handover method, in which a call manager of a network having a Circuit Switching (CS) network, a Long Term Evolution (LTE) network, and an Internet Protocol Multimedia Subsystem (IMS) network, provides handover, from the LTE network to the CS network, to a terminal that uses one radio channel. The handover method includes upon receiving a request for handover from the terminal via a node of the LTE network, establishing a line to a Mobile Switching Center (MSC) of the CS network; sending, to the call manager, a request for a change in a session to another party's terminal in communication with the terminal, to establish an Internet Protocol (IP) bearer between the call manager and the other party's terminal; and sending a handover command to the terminal during the establishment of an IP bearer, to establish a radio channel to the base station of the CS network.

Abstract: A communication system including a femto base station and a method for controlling access of a User Equipment (UE) in the communication system are provided. The method includes receiving a service request message from the UE and transmitting the service request message to a core network entity within a core network, receiving, from the core network, UE information and Local BreakOut (LBO) service information regarding the UE which is used to provide an LBO service to the UE, and providing the LBO service to the UE using the received information. Thus, a core network controls access of the UE so that the UE can directly access an Internet network through the LBO.

Abstract: A method and apparatus are provided for producing a decorated networking identifier at a client terminal for transmission to a server side element. The networking identifier is obtained at the client terminal. The networking identifier is appended with one or more extensible decorations at the client terminal creating the decorated networking identifier. The one or more extensible decorations are separated from the networking identifier by a first predetermined character. The one or more decorations each include a decoration sequence and an identifier corresponding to the decoration sequence. The identifier and the decoration sequence are separated by a second predetermined character. The decorated networking identifier is transmitted from the client terminal to the server side element.

Abstract: Disclosed is a system and a method for communication using different IPs, i.e. a mobile IP supporting mobility and a simple IP, according to the service by a UE. The method includes network initiated IP allocation (i.e. the network allocates different IPs to the UE) and UE initiated IP allocation (i.e. the UE directly requests an IP corresponding to a specific service). As such, the IP is selected and used based on consideration of continuity of the service to be supported by the UE.

Abstract: A method and apparatus is provided for communication between a first terminal capable of using both a Circuit Switched (CS) call and an Internet Protocol Multimedia Subsystem (IMS) session, and a second terminal capable of using the IMS session, in a communication system supporting a Combined CS call and IMS session (CSI service). If the second terminal sends a Session Initiation Protocol (SIP) request (INVITE) message to originate a voice service or a multimedia service including the voice service with the first terminal, a CSI Application Server (AS) of an IMS domain managing the first terminal separates a voice service-related component included in the request message from a multimedia service-related component, and generates and sends first and second request messages to the first terminal.

Abstract: A method and system for processing a message in an Internet protocol-based mobile communication system supporting a multimedia service. In the system, application servers include a representative application server and multiple backend application servers. A method for defining a control message between application servers to set up a session using the standard Internet protocol is provided. When an application server performs a call processing operation, control message processing load and control message transmission delay is reduced.

Abstract: A method and apparatus for registering the location of a terminal in a PS domain in a mobile communication network are provided, in which the terminal transmits a request message requesting registration of the location of the terminal to an MME of the mobile communication network, receives from the MME a response message including an eMSC indicator indicating an eMSC connected to the MME from among a plurality of eMSCs, and registers the location of the terminal to the eMSC indicated by the eMSC indicator included in the response message if the eMSC indicator included in the response message is different from an eMSC indicator stored in the terminal.

Abstract: The present invention relates to a method and system for management of the mobility of a terminal by using a non-access stratum (network stratum “NAS”) protocol in a mobile telecommunication network. The method for management of the mobility of a terminal by using an NAS protocol, i.e., messages includes a terminal (“UE”) and a mobile management entity (“MME”), and efficiently divides and processes security protected NAS messages and NAS messages with no security, and efficiently divides and processes EMM (EPS Mobility Management) messages, i.e., mobility management messages, and ESM (Evolved Session Management) messages, i.e., session management messages in a network such as an EPS (Evolved Packet System) of 3GPP, thereby managing the mobility and the sessions of a terminal in an efficient manner.

Abstract: The present invention relates to a mobile communication network, and more particularly to a method for the allocation and registration of a suitable generic access network (GAN) controller for the location of a terminal when the terminal moves in the mobile communication network.

Abstract: A session-adaptive radio resource allocation device and method for an EPS is provided. A resource allocation method for a wireless communication includes transmitting, at a Home evolved Node B (HeNB) received a downlink packet destined to a User Equipment (UE) in idle mode, a paging message including a local indicator to the UE; transmitting a service request message including the local indicator from the UE to a Mobility Management Entity (MME); transmitting a Initial Context Setup (ICS) message including an uplink Tunnel Endpoint Identifier (TEID) from the MME to the HeNB; and establishing a radio bearer for a local breakout session between the HeNB and UE and a radio bearer corresponding to an Evolved Packet System (EPS) bearer context of an internal Serving Gateway/Packet Data Network Gateway (SGW/PGW) of the HeNB using the TEID).

Abstract: A method and system in which upon occurrence of a P-CSCF failure, a network sends an IMS reregistration request message to a UE. An S-CSCF or an AS monitors a P-CSCF to detect occurrence of a failure in the P-CSCF. Upon detecting the occurrence of a P-CSCF failure, the S-CSCF or the AS sends a request message for IMS reregistration to the UEs being served by the failed P-CSCF. In this manner, the UE can continuously receive the service even though a failure occurs in the P-CSCF.

Abstract: A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target network. A data forwarding method of a data forwarding unit located in a serving network for a vertical handover according to the present invention includes receiving an address of a forwarding attachment unit located in a target network and a data forwarding preparation request that are transmitted by a user equipment; establishing an Internet Protocol (IP) tunnel to the forwarding attachment unit according to the data forwarding preparation request; and forwarding, when a vertical handover is initiated, handover packets to the forwarding attachment unit through the IP tunnel.

Abstract: A wireless communication system for performing a handover to a femto base station is provided. The system includes user equipment, a femto subscriber information storage, a core network entity or a macro base station or a serving base station. The femto subscriber information storage stores a list of femto base stations that allows the access of user equipment, i.e., an accessible list. The core network entity or the macro base station receives and stores the accessible list. When any of the user equipment requests a handover toward a femto base station as a target base station, and the target base station is included in the accessible list stored, the core network entity or the macro base station requests a handover toward the target base station. A method for performing a handover to the core network entity and the macro base station is also provided.

Abstract: A method for managing user context by a Home evolved NodeB (HeNB) is provided. The method includes requesting, by a Mobility Management Entity (MME), the HeNB to reserve a first type of User Equipment (UE) context information, obtaining, by the HeNB, the MME of the UE according to the first type of UE context information after receiving data, and notifying, by the HeNB, the MME of an arrival of the data. With the method according to the present invention, it is guaranteed by an HeNB system that a terminal can receive downlink signaling after activation of a local routing optimization service by the terminal.

Abstract: A method and apparatus for processing an IMS terminal's call request for real-time service and non-real-time service received over an IMS domain in a CSI terminal. When deciding to use a CS call for real-time service and an IMS session for non-real-time service, the CSI terminal sends an IMS session response for the non-real-time service. In the mean time, the CSI terminal generates a CS call request for the real-time service and sends the CS call request to an AS in an IMS domain. The AS sends the CS call request in association with the IMS session response to the IMS terminal, thereby completing a call setup. For the association, the AS sends its MSISDN to the CSI terminal and identifies from the MSISDN included in the CS call request and the IMS session response that the two messages are related to the IMS terminal's call request.

Abstract: A method and system for managing handover from a first radio access network to second radio access network is provided. The method includes receiving information associated with one or more neighboring cells from a User Equipment (UE). The information associated with the one or more neighboring cell is measurement reports. Thereafter, the method deciding to perform Handover (HO) based on the measurement reports for the UE from the first radio access network to the second radio access network. Further, the method identifies a target cell from the one or more neighboring cells. The method then determines target cell capabilities. Thereby, the method sends at least one of a handover required message and a relocation required message along with the target cell capabilities to a core network element. The core network element then manages voice bearers and non-voice bearers based on the target cell capabilities.