Abstract: A radio access system, and more particularly, a frame structure and a map structure are provided. A communication method includes transmitting an uplink sub-map to a receiver at a first downlink sub-frame included in a predetermined frame, and receiving data via a data burst indicated by the uplink sub-map at a first uplink sub-frame included in the predetermined frame. If the suggested sub-frame structure is used, it is possible to reduce HARQ ACK delay and HARQ retransmission delay.

Abstract: A method of transmitting a frame of a relay station (RS) in a wireless communication system employing the RS is provided. The method includes: receiving frame configuration information on an RS frame from a base station (BS); configuring a frame including a downlink (DL) access zone for transmitting a signal to a relay user equipment (UE), a DL receive zone for receiving a signal from the BS, an uplink (UL) access zone for receiving a signal from the relay UE connected to the RS, a UL transmit zone for transmitting a signal to the BS, and a transition gap; and transmitting a signal in at least one of the UL access zone and the UL transmit zone, wherein the transition gap is a switching time between a transmission operation and a reception operation of the RS and is included in at least one of the DL access zone and the UL transmit zone.

Abstract: A method for efficiently updating system information of a base station at a relay station of a broadband wireless access system and an apparatus for performing the method are disclosed. The method for updating system information of an advanced base station (ABS) at an advanced relay station (ARS) of a broadband wireless access system comprises receiving a first message, which includes changed information of the system information of the base station, from the base station; transmitting a second message for acknowledgment of the first message to the base station; and performing application for the changed information.

Abstract: A method and apparatus for performing a carrier management in a broadband wireless communication system supporting multi-carriers are disclosed. A method for a mobile station to perform a carrier management procedure with a base station supporting multiple carriers includes receiving a carrier management command message including an action code indicating a primary carrier change and an action time, on a serving primary carrier, transmitting an acknowledgement message indicating that the carrier management command message is successfully received in the mobile station, on the serving primary carrier, and switching the primary carrier to a target carrier indicated by the carrier management command message at the action time, wherein the action time is set to a value more than a retransmission timer, the retransmission timer is set to a time during which the base station waits for receiving the acknowledgement message in response to the carrier management command message.

Abstract: A method for paging in a wireless access system is disclosed. A method for efficiently paging a mobile station of an idle mode comprises allocating an identifier of a large paging group and an identifier of a specific one of small paging groups included in the large paging group to a broadcast channel region and transmitting a header including the broadcast channel region to the terminal. Accordingly, the present invention enables efficient paging.

Abstract: A method and apparatus for performing carrier management in a broadband wireless communication system supporting multiple carriers are disclosed. The method for a mobile station to perform carrier management procedure with a base station supporting multiple carriers includes receiving a carrier management command message from the base station, the carrier management command message including an action code for carrier management and a polling bit in a MAC Control Extended Header (MCEH) indicating whether an acknowledgement message is required, transmitting the acknowledgement message in response to the carrier management command message to the base station when the carrier management command message is successfully received and the polling bit is set to 1, and transmitting a carrier management indication message corresponding to the action code included in the carrier management command message to the base station.

Abstract: A method for transmitting and receiving ARQ feedback information in a wireless communication system is disclosed. A method for allowing a mobile station to transmit an ARQ feedback in a broadband wireless access system includes receiving an ARQ block and an ARQ feedback polling from the base station, wherein the ARQ feedback polling requests the mobile station to transmit ARQ feedback information indicating whether the ARQ block is successfully received, receiving a first uplink resource for transmitting the ARQ feedback from the base station, and determining whether the received ARQ block is successfully received. The first uplink resource has a minimum size capable of being allocated to the ARQ feedback information.

Abstract: A method and apparatus performing carrier management in a broadband wireless communication system supporting multi-carrier (MC) are disclosed. A method for a single-carrier supported mobile station (MS) to perform a carrier change with a MC supported base station (BS) includes transmitting a message indicating a support of a basic MC mode in which the MS is aware of a MC operation of the BS, receiving a carrier management command message including an action code and an action time on a serving carrier, transmitting, in response to the carrier management command message, a confirmation message indicating readiness of signal transmission/reception through a target carrier on a target carrier, and receiving a control signal and data from the BS on the target carrier, wherein the serving carrier and the target carrier are controlled by a common Medium Access Control (MAC) of the BS.

Abstract: A frame structure used in a wireless access system and a method for allocating uplink control channels are provided. The method transmits a super-MAP including information regarding a control channel allocation method and control channel allocation information to a receiving end and receives a control signal through an uplink subframe indicated by the control channel allocation information using the control channel allocation method. Thus, the transmitting end can correctly allocate a control channel for each downlink burst.

Abstract: A method for transmitting subframe grouping information and a method for decoding subframe-grouped frames are provided. The subframe grouping information transmission method updates a grouping information field of a MAC message, which a serving base station periodically broadcasts to an MS, using subframe grouping information determined by a target base station, and periodically transmits the MAC message to the MS. This method enables provision of a downlink signaling method for supporting variable TTIs of a base station when handover is performed, thereby minimizing service delay of each mobile station and enabling efficient utilization of resources.

Abstract: A method for allocating a submap is disclosed. The method includes configuring a subframe including one or more resource areas according to a size of the submap, allocating the submap and a control header including subframe configuration information and submap information to the one or more resource areas, and transmitting the control header.

Abstract: A method for transmitting information that supports a legacy system and a multi-carrier system is disclosed. The method for transmitting information supporting a legacy system includes constructing a frame structure for supporting the legacy system, and transmitting a frame header including allocation information of the frame structure to a mobile station.

Abstract: A ranging method in a mobile station of a femto system is disclosed. According to the present invention, a femto base station enables non-synchronized ranging channel (NS-RCH) information to be carried on S-SFH SP1. A mobile station receives S-SFH and then determines whether a base station is a femto base station. If the base station is the femto base station, the mobile station is able to perform a periodic ranging using the NS-RCH information within the S-SFH as well as an initial/handover ranging.

Abstract: A method for a base station to allocate an uplink resource using an uplink map in a wireless access system is disclosed. The present invention includes the steps of receiving a system information delivery message including subframe configuration information, receiving a map message including information on an allocation location of an uplink resource region, and calculating a time of allocating the uplink resource region using the subframe configuration information and the information on the allocation location of the uplink resource region.

Abstract: A method for allocating various transmit time intervals (TTIs) if a sub-frame structure is used, in a radio access system is provided. A transmitter transmits a super frame header including TTI information of a sub-frame included in a super frame to a receiver and transmits a sub-map including resource allocation information to the receiver, thereby dynamically allocating the TTI. Since the TTI information may not be received via the sub-map in every sub-frame, it is possible to prevent waste of a radio resource.

Abstract: A method for managing carriers allocated to a mobile station in a broadband wireless access system supporting multiple carriers, and an apparatus for use in the method are disclosed. A carrier management method for allowing a mobile station to perform carrier management in a broadband wireless access system supporting multiple carriers includes receiving a first message, which includes activation information indicating activation of at least one target carrier from among one or more second carriers allocated through a first carrier, from a base station, and transmitting a second message, which informs the base station of readiness or non-readiness of the at least one target carrier according to a result of the activation, to the base station. The activation information includes information indicating an activation time point, and the transmitting of the second message is performed at a specific time indicated by the activation time point information.

Abstract: A method of an efficient low duty mode (LDM) operation for a femto base station is disclosed. The method of a low duty mode (LDM) operation for a femto base station comprises operating at an available interval of a first length according to a default LDM pattern; and operating at an unavailable interval of a second length according to the default LDM pattern, wherein the available interval begins with a frame including a first preamble, the first preamble including information of carrier configuration and system bandwidth.

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 a resource start offset field. The resource start offset field indicates an index of a starting resource unit of resources allocated by the ACK.

Abstract: A method and apparatus for transmitting and receiving control information in a wireless communication system are disclosed. The control information transmission method includes masking a Cyclic Redundancy Check (CRC) by a CRC mask including a bit stream of a predetermined length and an indicator indicating the bit stream, and transmitting control information including the masked CRC to at least one Mobile Station (MS). The indicator indicates whether the bit stream included in the CRC mask includes a Random Access IDentifier (RAID).

Abstract: A method for updating system information in a terminal in which data is transmitted by means of superframes, includes: receiving system information, scheduling periodicity information of the system information and changing information indicating changing status of the system information transmitted by means of a superframe header (SFH) from a base station; and updating the system information based on the changing information, wherein the SFH comprises a primary SFH including the changing information and a secondary SFH including at least one subpacket containing the system information, the scheduling periodicity information indicating a transmission periodicity of the subpacket is transmitted by means of the primary SFH or a predetermined subpacket, and when the terminal detects that a changed system information transmitted by means of the subpacket is not scheduled as indicated in the scheduling periodicity information, the terminal wakes up until the changed system information is received.