Abstract: A method of transmitting and receiving a channel quality indicator (CQI) for a sleep-mode mobile station is disclosed. When data to be transmitted to the mobile station is present, the mobile station which is in a sleep mode is directed to transition to a normal mode and simultaneously a temporary CQI channel is allocated thereto. Thus the mobile station which has transitioned to the normal mode from the sleep mode efficiently transmits the CQI, and data applying a proper modulation and coding scheme can be transmitted.

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.

Abstract: A band adaptive modulation and coding method sharing resources with neighboring base stations and a mobile station supporting the same are disclosed. The mobile station identifies a channel status for each band by periodically scanning a neighboring base station, and requests a service base station to convert a current mode to a band sharing AMC mode if the identified channel stats satisfies a predetermined condition. The mobile station can use CQICH of 4 bits or 6 bits to request mode conversion. Selectively, the service base station can request the mobile station of channel status information of a neighboring base station to determine mode conversion.

Abstract: A method of allocating a radio resource in a wireless access system is disclosed. The method includes receiving a control message associated with radio resource allocation for transmitting uplink data to the base station, wherein the control message comprises a first persistent uplink allocation information element comprising first resource allocation information associated with a first resource allocation region for transmitting the uplink data of a mobile station and transmitting an acknowledgment (ACK) message from the mobile station to the base station in response to successfully receiving the first persistent uplink allocation information element.

Abstract: A method of establishing security association during handover between heterogeneous networks in a radio access system is disclosed. A method of establishing security association before handover with a target base station included in a heterogeneous radio access network is performed comprises transmitting a request message to a service base station, the request message requesting the service base station to transfer authentication related information of a mobile station to a target network authentication server; and receiving a response message from the service base station before the handover with the target base station is performed, the response message including security related information used in a target network.

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 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 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 method for updating system information in a broadband wireless communication system in which data is transmitted and received via a superframe, includes: receiving information from a base station by means of superframes including a primary superframe header (P-SFH) and a secondary superframe header (S-SFH), wherein the information including control information transmitted via an information element of the P-SFH (P-SFH IE) and system information transmitted via at least one of information element of a subpacket (SP) of the S-SFH (S-SFH SP IE); decoding the P-SFH IE, wherein the P-SFH IE including a scheduling information bitmap indicating a transmitted S-SFH SP IEs in the superframe, a change count (CC) of the S-SFH, and a SP change bitmap indicating changing status of the S-SFH SP IEs; comparing the received CC with a previously stored CC; checking the S-SFH SP change bitmap, if there is a difference between the received CC and the stored CC; and decoding and updating corresponding SP IE of the S-SFH based

Abstract: A method for performing emergency communication between a mobile station and a base station in a wireless communication system is disclosed. The method includes receiving allocation of a contention-free-based control channel from a base station, and transmitting an emergency service request message through the contention-free-based control channel. The contention-free-based control channel may be one of a channel quality indicator (CQI) channel and an acknowledgement/negative-acknowledgement (ACK/NACK) channel. Since the emergency service request message can be transmitted through a contention-free dedicated code and a dedicated region, a procedure is simplified and power resources of the mobile station can be saved.

Abstract: A method for transmitting and receiving a control channel with additional information is disclosed. To this end, a mobile station acquires information of at least one control channel, which supports additional information transmission through phase rotation, and phase rotation value information for representing the additional information, and transmits control information through any one of the control channels and the additional information through phase rotation of the control information. A base station provides information of at least one control channel, which supports additional information transmission through phase rotation, and phase rotation value information for representing the additional information, and simultaneously receives specific control information and additional information from the mobile station based on the control channel information and the phase rotation value information.

Abstract: A first transparent relay station (RS) can receive a signal from a base station (BS) corresponding to superordinate node of the first transparent RS or a second RS corresponding to superordinate non-transparent RS the first transparent RS through a downlink receive zone, and the first transparent RS can transmit the signal received through the downlink receive zone to a mobile station (MS) through a downlink transmit zone, wherein a downlink subframes of the first transparent RS is located the downlink receive zone and the downlink transmit zone in order.

Abstract: A method of reporting a channel state for a plurality of bands includes transmitting channel quality indicators (CQIs) for the respective bands, and transmitting CQI variation information, wherein the CQI variation information comprises CQI up/down information indicating whether the CQIs of the respective bands collectively increase or decrease and a CQI variation indicating a collective variation of the CQIs of the respective bands. Accordingly, waste of resources consumed for the CQIs can be reduced.

Abstract: The present invention relates to allocating data regions in an orthogonal frequency division multiplexing access system. The present invention comprises receiving a message comprising information for locating a data region of a data map allocated to a mobile station identified in the message for transmitting and receiving information, and identifying the data region of the data map allocated to the identified mobile station by reading the received message, wherein the data region is identified independent of identifying data regions of another data map.

Abstract: A method of emergency communication between a mobile station and a base station in a broadband radio access system and a mobile station which supports the method of emergency communication are disclosed. The method of emergency communication is divided into a case where the mobile station requests an emergency service in a state that the mobile station is registered with the base station and a case where the mobile station requests an emergency service in a state that the mobile is not registered with the base station. In case of the one case, the mobile station requests the base station of an emergency service using a newly defined emergency code or a conventional bandwidth request code and negotiates a basic function required for an emergency service with the base station through predetermined header data.

Abstract: The present invention relates to a method and apparatus for requesting a base station of emergency call connection within the shortest time regardless of location or channel status of a mobile station in a mobile communication system. When the mobile station requests an uplink to connect emergency call, the base station establishes a communication path of mobile station-relay station-base station if signal quality of the mobile station is not better than signal quality transmitted through the relay station, whereby ranging or transmission of emergency data is prevented from being repeated under poor channel status, so as to enable a prompt emergency rescue service.

Abstract: The present invention relates to allocating data regions in an orthogonal frequency division multiplexing access system. The present invention comprises receiving a message comprising information for locating a data region of a data map allocated to a mobile station identified in the message for transmitting and receiving information, and identifying the data region of the data map allocated to the identified mobile station by reading the received message, wherein the data region is identified independent of identifying data regions of another data map.

Abstract: A method of broadcasting frequency policy information in a cognitive radio based communication system, apparatus therefore and a communication method using the same are disclosed. In particular, a policy broadcaster is provided as a subject performing a broadcast of frequency policy information in cognitive radio communication. A method of broadcasting frequency policy information using the same and a method of performing cognitive radio communication by obtaining frequency policy information using the same are provided. Moreover, an enhanced superframe structure, which is capable of providing a seamless service in case that a narrowband terminal is introduced in the middle of a superframe, is provided.

Abstract: A method for handover between heterogeneous radio access networks is disclosed. When a multi-mode mobile station performs Inter-RAT handover, pre-authentication is performed before implementing a link layer handover procedure with a target access point. The pre-authentication method has as little an effect on currently served quality of service as possible and the handover is efficiently performed using the pre-authentication method. The pre-authentication is performed through medium independent handover (MIH) and various MIH primitives for pre-authentication are provided.

Abstract: A data communication method is disclosed, which can simultaneously support heterogeneous systems in a wireless communication system based on multiple carrier multiple access. For a dual mode between heterogeneous systems, the data communication method includes transmitting control information for a first system mode and a second system mode to a mobile station through a channel resource zone used in the first system mode, and performing data transmission and reception between the system and the mobile station through channel resource zones allocated from the first system mode or the second system mode.