Abstract: A method of requiring uplink resource and handover in a wireless communication system including relay stations is disclosed. The present invention includes transmitting request for uplink resource allocation to a relay station and receiving a message indicating the relay station cannot allocate an uplink resource to the mobile station within a period for which the mobile station waits for a response, from the relay station.

Abstract: An interface device includes a transaction management unit, a buffer unit and a selection circuit. The transaction management unit selectively splits a transaction of a master device into a first sub-transaction and at least one remaining sub-transaction based on a size of the transaction. The buffer unit stores the remaining sub-transaction. The selection circuit selects one of the first sub-transaction and an output of the buffer unit in response to a select control signal.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a method and an apparatus for acquiring system information in a mobile communication system in which a legacy system and an advanced system coexist. A method of receiving system information on a peripheral base station in a mobile communication system includes receiving a second message containing time information for receiving, through a second region of a serving base station, a first message broadcasted through a first region of the serving base station and receiving the first message through the first region of the serving base station using the time information, the first message containing system information on neighbor legacy base stations and/or on the first region of neighbor advanced base stations which operate in a mixed mode.

Abstract: The present invention relates to a method and an apparatus that supports a multi-carrier wireless access system for transmitting and receiving system information. The 1st embodiment of the present invention is a method for controlling a center frequency in a wireless access system comprising the steps of: receiving a control message including a 1st parameter which indicates a configuration of carrier groups and a 2nd parameter which indicates whether the center frequency is controlled from a base station; deriving the center frequency of carriers allocated to a mobile terminal by using the 1st parameter; and controlling the center frequency by using the 2nd parameter.

Abstract: The present invention relates to a wireless access system which supports multiple carriers, and disclosed is a method for coordinating the performance of the multiple carriers and an apparatus for supporting same. The method for coordinating the performance of the multiple carriers according to the present invention broadly consists of two steps. For example, the method comprises the steps of coordinating the basic performance of the multiple carriers in mobile user equipment and coordinating the extended performance of the multiple carriers in the mobile user equipment.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a method for a mobile station to efficiently scan a neighbor base station and apparatus therefor. According to one embodiment of the present invention, in a broadband wireless access system, a method of performing a scan, which is performed by a mobile station to scan a neighbor base station, includes the steps of receiving a scan response (AAI_SCN-RSP) message including a first interval information indicating an interval for the mobile station to receive a preamble of the neighbor base station from a serving base station and receiving the preamble from the neighbor base station in the first interval. Preferably, the first interval is set by a subframe unit.

Abstract: The present system relates to a broadband wireless access system, and more specifically to a method whereby resources for ranging are efficiently allocated to a mobile station with reference to the status of the mobile station, and also relates to a device for implementing the same. In one example of the present invention, the method for allowing a mobile station to range on a broadband wireless access system may comprise the steps of: selecting any one code from one or more codes contained in a ranging code subset corresponding to the status of a mobile station in one or more ranging codes subsets set in accordance with the purpose of the ranging by the mobile station mode; and transmitting the selected code to a base station.

Abstract: A method for transmitting and receiving an ACKnowledgment (ACK) in a wireless communication system is disclosed. The method includes transmitting a bandwidth request indicator to a Base Station (BS); and receiving an ACK for the transmitted bandwidth request indicator from the BS, the ACK including an extended A-MAP Type field, wherein the extended A-MAP Type field indicates a format of the ACK.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a handover method that can reduce a stop time in an entry before a break-type handover for performing more efficient handover, and to apparatus for performing same. A handover method for a terminal in a broadband wireless access system according to one embodiment of the present invention may include: receiving, from a serving base station, a handover command message including the information of a section in which scheduling for the terminal is not performed; transmitting a ranging code to a target base station during the section; and receiving information indicating the transmitted result of the ranging code from the serving base station.

Abstract: A method for supporting a handover on the basis of the distance from an intermediate access point to a user equipment includes receiving uplink message set information of the user equipment from a serving base station of the user equipment; receiving the uplink message transmitted by predetermined transmitting power from the user equipment, and detecting the user equipment which has sent the uplink message on the basis of the uplink message set information; determining the receiving power by which said uplink message is received; calculating the distance between the intermediate access point and the detected user equipment by using said predetermined transmitting power and said receiving power; and performing a subsequent handover based on the distance calculated in the previous step.

Abstract: A method for allowing a mobile station (MS) to perform zone switching within coverage of a base station (BS) in a broadband wireless access system is disclosed. A method for controlling an advanced mobile station (AMS) to perform zone switching in an MZone of a serving advanced base station (serving ABS) supporting a legacy mobile station (MS) includes receiving a handover command (AAI_HO-CMD) message indicating zone switching to a legacy zone (LZone) from the MZone, and receiving at least one of an uplink MAP (UL-MAP) and a downlink MAP (DL-MAP) from the LZone.

Abstract: A method for determining whether a mobile station (MS) is present in coverage of a serving base station (SBS) during a handover process and an apparatus for carrying out the same, resulting in the implementation of more reliable handover, are disclosed. A method for controlling an MS to perform a presence check procedure during handover of a broadband wireless access system includes receiving a first signal for a presence check request from an SBS, and transmitting a second signal as a response to the presence check request to the SBS. Preferably, the first signal is received after the lapse of a first time indicating a deadline at which the MS performs network re-entry to a target base station (TBS).

Abstract: The present invention relates to a handover method for a mobile communication system.

Abstract: The present invention relates to method and device that controls the mobility of a terminal in a broadband wireless access system including a relay station. The present invention provides an efficient method for controlling terminal mobility of a relay station and a method for performing handover of a terminal. The method for controlling mobility of terminal at a relay station in a broadband wireless access system according to one embodiment of the present invention comprises step wherein at least one neighboring base station entity searched is added in a list, and a step wherein a broadcast message including the list is transmitted to the terminal.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a method for efficiently acquiring system information on a target base station during a hand-over, and to an apparatus for carrying out the method. One method for enabling a mobile station to update system information on a target base station during a hand-over, according to one embodiment of the present invention, comprises the steps of: receiving, from a serving base station, a broadcast message containing system information on at least one neighbor base station including the target base station, and containing first change count information for indicating whether or not to update the system information; and receiving, from the serving base station, second change count information for indicating whether or not to update the system information currently possessed by the serving base station.

Abstract: The present invention relates t a wideband radio access system, and more particularly, to a method for enabling adjustment of timing to transmit a handover instruction message and to a mobile terminal capable of performing the method. A method for a terminal handover in a wideband radio access system according to one embodiment of the present invention comprises: receiving from a serving base station a handover command message that contains first timing information indicative of a time for transmitting a first uplink resource allocation information to transmit a handover instruction message; receiving the first uplink allocation information from the serving base station at the timing indicated by the first timing information; and transmitting the handover instruction message to the serving base station through an uplink resource indicated by the first uplink allocation information.

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 of performing a handover in a wireless communication system employing a macro base station and a femto base station is provided. The method comprising: monitoring an uplink signal transmitted from a user equipment to the macro base station; transmitting a handover initiation message to the macro base station on the basis of a result of comparing the uplink signal's strength obtained by the monitoring with a reference value; and performing a handover of the user equipment from the macro base station to the femto base station. According to the present invention, there is provided a method of initiating a handover by a femto base station by fining user equipments located in a cell coverage of the femto base station. In addition, a signaling overhead is reduced by utilizing previously existing information such as uplink transmit power.

Abstract: Disclosed is a method for enabling a mobile terminal to perform a handover in a mobile communication system. A serving base station which supports both a first communication scheme and a second communication scheme can transmit, to the mobile terminal, a neighbor base station list broadcast message containing time offset information indicating the point of time to transmit information on a second base station which uses the second communication scheme and supports only the second communication scheme via a specific zone using the second communication scheme. The mobile terminal which has received the message can receive, from the serving base station, the information on the second base station via the specific zone on the basis of the received time offset information.

Abstract: The present invention relates to a broadband wireless access system, and more particularly, to a method for efficiently operating a service unavailable mode of Femto base station. The method for operating a service unavailable mode of Femto base station in the broadband wireless access system according to one embodiment of the present invention, comprises the steps of: determining whether the preset condition for the operation of a service unavailable mode is satisfied; and broadcasting service unavailable mode information for indicating the state of service unavailable mode of the Femto base station in accordance with the result of determination on the preset condition.