Abstract: A method for updating a tracking area in a wireless communication system is provided. The method may be performed between a mobile relay node and a user equipment. The mobile relay node transmits a tracking area change message to a user equipment (UE) on the mobile relay node, receives a tracking area change response message from the UE as a response to the tracking area change message, transmits a tracking area update (TAU) request message to a donor evolved NodeB (DeNB), receives a TAU accept message from a mobility management entity (MME), and transmits a TAU complete message to the UE.

Abstract: A method and apparatus for performing a handover procedure in a wireless communication system including a mobile relay node is provided. A target evolved NodeB (eNB) receives a handover request message containing a list of a plurality of user equipments (UEs) on the mobile relay node or a group handover indication. The target eNB performs an admission control for the plurality of UEs; and transmits a handover request acknowledge message containing a list of admitted UEs for handover among the plurality of UEs.

Abstract: A method and apparatus for transmitting a transport network layer (TNL) address in a wireless communication system is provided. A home eNodeB (HeNB)/X2-proxy determines a TNL address and an eNB ID to be transmitted in a configuration transfer message based on an indication whether a direct X2 interface or an indirect X2 interface is to be established between a macro eNB and a HeNB.

Abstract: Various methods and apparatus for encrypting signals in a wireless access system are disclosed. A method for selectively encrypting a management message in an MS includes steps of generating a Medium Access Control Protocol Data Unit (MAC PDU) including the selectively encrypted management message and an Fragmentation Extended Header (FEH) and transmitting the MAC PDU to the BS. The FEH includes indication information indicating whether the management message was encrypted.

Abstract: A method and apparatus for verifying a release of a local IP access (LIPA) packet data network (PDN) connection in a wireless communication system is provided. A mobility management entity (MME) receives a handover preparation message from a source home eNodeB (HeNB), verifying whether the LIPA PDN connection has been released or not on receiving the handover preparation message. If the LIPA PDN connection has been released already, the MME performs a normal handover procedure. If the LIPA PDN connection has not been released, the MME transmits a handover preparation failure message to the source HeNB.

Abstract: A method of establishing security association between heterogeneous networks is disclosed. The method comprises a first step of receiving information of heterogeneous networks near a mobile station; a second step of transmitting a request message requesting authentication related information transfer to a target heterogeneous network where the mobile station intends to perform handover, among the heterogeneous networks near the mobile station; and a third step of receiving authentication related information and key related information of the target heterogeneous network. At this time, the first step, the second step, and the third step are preferable performed before handover is performed between heterogeneous networks.

Abstract: A method and apparatus of performing access control in a wireless communication system is provided. A first home eNodeB (eNB) determines whether an X2 interface between the first HeNB and a second HeNB is available or not for an X2 handover based on a cell access mode of the second HeNB. Or, a first macro eNB determines whether an X2 interface between the first macro eNB and a second HeNB is available or not for an X2 handover based on a cell access mode of the second HeNB. Or, access control is performed by a home eNB gateway (GW).

Abstract: The present invention relates to methods for sending and receiving security related information during handover on a wireless access system and methods for managing a traffic encoding key (TEK). In one example of the present invention, a security performance negotiation method for supporting the hand-over of mobile handsets comprises the steps of: carrying out, in advance, a security performance negotiation procedure with a first base station (T-ABS), prior to registration on the first base station; generating a traffic encoding key (TEK) by using security related information acquired by means of the security performance negotiation procedure; and carrying out a general performance exchange procedure encoded by means of the TEK and a zone switch with the first base station.

Abstract: A method for performing band handover in a broadband wireless access system is provided. In this method, a terminal in a band AMC mode in which the terminal transmits and receives data through a band selected from among bands to which a modulation scheme and a coding rate are adaptively applied receives channel status information of each band of a neighboring base station. The terminal then performs handover to the neighboring base station while maintaining the band AMC mode if it is determined based on the received channel status information that a channel status of each band of the neighboring base station satisfies a predetermined condition. This band handover method enables handover to be performed for each specific frequency band of a mobile terminal.

Abstract: A fast uplink data transmission method for a handover is disclosed. This method effectively uses a handover signal when there is data to be transmitted to an uplink during an Intra Radio Access Technology (I-RAT) handover, such that it quickly transmits and receives uplink data. The method of transmitting uplink data in a wireless access system includes, transmitting a message including an information bit to a target base station by a mobile station during a handover, wherein the information bit indicates whether the uplink data is present, and receiving a radio resource for transmitting the uplink data from the target base station, if the information bit indicates the uplink data is present, wherein the radio resource is allocated by the target base station. So, uplink user data can be quickly transmitted to a destination while the UE performs the handover.

Abstract: A pre-authentication method for an Inter-RAT handover is disclosed. This pre-authentication method relates to a wireless access system, and provides a method for performing pre-authentication in case of an inter-RAT handover managed by different administrative domains. The method for performing pre-authentication before a handover in order to quickly perform an Inter-Radio Access Technology (Inter-RAT) handover, includes, transmitting a message having terminal information needed for the pre-authentication to a target authentication server, receiving security-associated information of a target network from the target authentication server, wherein the target network security-associated information is generated by the mobile terminal information, and generating security-associated information, which will be used by the mobile terminal in the target network, using the security-associated information of the target network, and performing the pre-authentication.

Abstract: A packet reordering method and a packet transmission method to implement reliable data communication are disclosed. The method of transmitting packets at a serving base station in case of a mobile station performing handover include, receiving a series of packets from an upper layer entity, and transmitting the series of packets one after the other to a target base station, wherein a packet of the series of packets includes an information field which represents whether the packet is the last transmitted packet. When the mobile station performs the I-RAT handover, the target serving station pre-reorders PDU packets, and transmits the reordered PDU packets to the mobile station, such that the mobile station can quickly transmit data without reordering the packets.

Abstract: A method and apparatus of performing a handover procedure in a wireless communication system is provided. The method includes receiving a handover request message from a relay node (RN), and determining whether a first X2 interface between the donor BS and a target BS is available or not.

Abstract: A method and apparatus of performing a handover procedure in a wireless communication system is provided. The method includes receiving a handover request message from a relay node (RN), transmitting an end marker to the RN, buffering downlink (DL) data packets, transmitting a handover request acknowledgement message to the RN if the handover request message is acknowledged, and forwarding the buffered DL data packets to a target BS.

Abstract: A device, system and method for performing an uncontrolled handover in a mobile station, a ranging request message including an identifier of a serving base station and a first identifier used in the serving base station is transmitted to a first target base station to perform network (re)entry to the first target base station, and a ranging response message including security information and a second identifier for identifying the mobile station is received from the first target base station.

Abstract: A device, system and method for performing an uncontrolled handover in a mobile station, a ranging request message including an identifier of a serving base station and a first identifier used in the serving base station is transmitted to a first target base station to perform network (re)entry to the first target base station, and a ranging response message including security information and a second identifier for identifying the mobile station is received from the first target base station.

Abstract: A method of enabling a mobile station to perform initialization to a base station in a wireless communication system is provided. The method includes synchronizing with the base station, obtaining an uplink parameter based on the synchronization, performing initial ranging by using the uplink parameter and establishing security association between the mobile station and the base station while performing the initial ranging. During the initial ranging, a mobile station's unique identifier or control signaling can securely be transmitted.

Abstract: A method of supporting location privacy of a mobile station includes receiving, from a base station, a temporary station identifier (TSTID) during an initial ranging procedure; transmitting a registration request (REG-REQ) message requesting a registration to the base station, the REG-REQ message including a real medium access control (MAC) address of the mobile station; and receiving, from the base station, a registration response (REG-RSP) message including a station identifier (STID) assigned to the mobile station. The TSTID is temporarily used to protect a mapping between the real MAC address of the mobile station and the STID, and the TSTID is used until the STID is assigned to the mobile station.

Abstract: A method of supporting location privacy of a mobile station includes receiving, from a base station, a message including a temporary station identifier (TSTID) during an initial ranging procedure, wherein the TSTID is temporarily used to protect the location privacy of the mobile station; performing, with the base station, a basic capabilities negotiation procedure after the initial ranging procedure; performing, with the base station, an authentication procedure after the basic capabilities negotiation procedure; performing, with the base station, a registration procedure after the authentication procedure; and releasing the TSTID after receiving a station identifier (STID) which is assigned during the registration procedure, wherein the STID uniquely identifies the mobile station in the base station.

Abstract: A method of performing initial ranging in a wireless communication system includes transmitting a ranging request message and receiving a ranging response message including a temporary identifier for a mobile station which transmits the ranging request message. By using the temporary identifier which identifies the mobile station before establishing authentication, it is possible to prevent the MAC address from being exposed to a malicious attacker through a wireless interface and to secure location privacy.