Abstract: A method and apparatus for transmitting and receiving system information in a wireless communication system are disclosed. A method for receiving system information by a mobile station (MS) of a wireless communication system includes receiving a secondary superframe header (S-SFH) change cycle from a base station (BS), and receiving a primary superframe header information element (P-SFH IE) including a first field indicating a change count of a plurality of secondary superframe header subpacket information elements (S-SFH SP IEs) from the base station (BS). Once each of the plurality of S-SFH SP IEs is changed, each of the plurality of S-SFH SP IEs remains unchanged during one or more S-SFH change cycles.

Abstract: A method for a feedback to an uplink allocation request is disclosed. The method for a feedback to an uplink allocation request comprises receiving a bandwidth request (BR) of the mobile station in a base station; detecting codes from the bandwidth request; and transmitting a BR result report to a mobile station, the BR result report indicating detection failure when detecting the codes or code repetition. According to the embodiment of the present invention, it is advantageous in that a wait time of a timer can be reduced as the base station directly reports the result of the transmission of the bandwidth request can be performed promptly.

Abstract: A method for requesting uplink resources and transmitting data is provided. The method includes being allocated to a BR code from a BS by an MS, and transmitting a BR indicator in a format without an ID of the MS to the BS using the BR code in non-contention mode by the MS. Because contention-based MSs and non-contention-based MSs transmit different uplink allocation request information, unnecessary information transmission is avoided, which is efficient. Also, information specific to each MS can be transmitted in extra resources.

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 for requesting a bandwidth by a message having a variable format is disclosed. The method includes determining a bandwidth request type according to a size of an uplink bandwidth requested by a mobile station, generating a bandwidth request message having a header format according to the determined bandwidth request type, and transmitting the bandwidth request message to a base station. The determined bandwidth request type is one of a bandwidth request per connection, a bandwidth request per Quality of Service (QoS), and a bandwidth request per mobile station.

Abstract: A broadband wireless access system and, more particularly, a method for a mobile station and a base station to perform an efficient ranging procedure considering a ranging purpose and a device for performing the same are disclosed herein. A method of a mobile station for performing ranging in a broadband wireless access system, the method includes the steps of transmitting a first ranging preamble code for requesting ranging to a base station through a first ranging opportunity of a first frame, and, when a first message is received from the base station before a timer indicating a limited time point is expired, wherein the first message including a response to the first ranging preamble code is transmitted during the limited time point, determining whether or not the ranging request is successfully made by using the first message.

Abstract: A method for transmitting uplink data according to a dynamic resource request is disclosed. The method includes confirming, at a mobile station, whether a service type for a bandwidth request is sensitive to delay, if the service type is not sensitive to delay, shifting a phase of a fast feedback channel and transmitting the phase-shifted fast feedback channel, if the service type is sensitive to delay or if a bandwidth request grant message corresponding to the phase-shifted fast feedback channel is received from a base station, transmitting a bandwidth request information corresponding to the service type to the base station, and upon receiving an uplink grant message for an uplink resource according to the bandwidth request information from the base station, transmitting data though the uplink resource.

Abstract: A method for receiving a superframe header at a mobile station in a wireless mobile communication system is disclosed. The method comprises receiving a sub-frame including the superframe header and a first data channel and decoding the received superframe header. Herein, the superframe header is located within a predetermined physical frequency band and the predetermined physical frequency band includes a synchronization channel.

Abstract: A method of transmitting and receiving uplink data using transmission of profile indexes is disclosed. The method of includes transmitting, at a mobile station, any one of codewords mapped to a plurality of bandwidth request profiles according to a service characteristic to a base station through a fast feedback channel, and upon receiving an uplink grant message for an up-link resource allocated in correspondence to the codeword from the base station, transmitting data though the uplink resource. As a result, collision does not occur during a resource request, quality of service (QoS) of a real-time traffic sensitive to delay can be satisfied, an uplink allocation request procedure is simplified thus reducing message overhead, and a resource can be efficiently used according to a characteristic of a service provided to the mobile station.

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 handover performing method and a method of allocating a connection identifier (CID) at the time of handover are disclosed. The method includes transmitting a handover request message to a serving base station, and receiving a handover response message including CID update information used in a target base station from the serving base station. At this time, the CID update information may include a transport CID (TCID) allocation start position and a TCID allocable value used in the target base station. Accordingly, it is possible to minimize service delay of a mobile station by providing a method of updating the CID of the mobile station for performing fast handover.

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 for transmitting and updating system information in a system that supports a legacy mobile station is disclosed. A method for transmitting system information according to one embodiment of the present invention comprises transmitting a super-map through a new zone of a super-frame, the super-map including channel description transmission control information indicating a channel descriptor of a legacy zone; and transmitting the channel descriptor and a map message through the legacy zone, the map message indicating the channel descriptor.

Abstract: A method for a handover with consideration of neighbor base stations' circumstances is disclosed. The method for a handover with consideration of neighbor base stations' circumstances by a mobile station in a wireless communication system includes transmitting a handover request (MOB_MSHO-REQ) message to a serving base station, receiving a handover response (MOB_BSHO-RSP) message including a base stations list made with consideration of the neighbor base station's circumstances from the serving base station, and selecting a base station among neighbor base stations except some base stations of the base stations list and transmitting a handover indicate (MOB_HO_IND) message including a information of the selected base station to the serving base station.

Abstract: A method for commanding and performing network entry is disclosed. The method for commanding network entry using a non-periodic message in a Base Station (BS) includes broadcasting a first pattern indicating ready for restart once or more times to a Mobile Station (MS), when the BS determines to restart due to a serious error of the BS, and performing a restart procedure, and broadcasting a second pattern indicating network entry to the MS, upon completion of the restart procedure.

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 group scheduling method, a method for selectively receiving information elements according to group scheduling, and a Mobile Station (MS) are provided. The group scheduling method schedules allocation of resources to a plurality of mobile stations by dividing the plurality of mobile stations into at least one group. The group scheduling method includes enabling an index element in a group index corresponding to a group to which a mobile station (MS) scheduled to transmit data belongs and placing a group allocation information element including the group index at the beginning of a MAP. In this method, group scheduling information is transmitted to MSs using a group allocation IE to prevent the MSs from reading unnecessary information transmitted every frame, thereby reducing power consumption of the MSs.

Abstract: A method for allocating resource regions in a wireless access system is provided. This method collectively allocates resources in non-consecutive frames. Specifically, a message, including allocation information used to collectively and non-consecutively allocate identical resource regions, is received from a base station and data is transmitted or received through the allocated resource regions. Since identical resource regions are collectively allocated in multiple frames, it is possible to reduce both the number of transmissions of a MAP message and MAP overhead in a network.

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 of efficiently allocating a resource to a mobile station to support a real time service in a radio access system is provided. The method includes grouping one or more mobile stations and allocating a group resource area for transmitting bandwidth request information for transmitting real time service data of the grouped one or more mobile stations, and allocating respective individual resource areas of the one or more mobile stations included in the group resource area. Since the method of grouping the mobile service and efficiently allocating an uplink resource are provided, it is possible to reduce message overhead and efficiently use the resource.