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 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 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.

Abstract: A method for a Base station (BS) to allocate resources to terminals in a broadband wireless access system, a method for transmitting signals of a terminal, and a method for constructing an uplink MAP for the same are provided. Start position information of each allocated region may be included in uplink resource allocation information or information indicating the position of a region dedicated to VoIP traffic may be included in an uplink MAP. The uplink MAP may include separate resource allocation information for VoIP services. Through this resource allocation, the terminal can efficiently transmit uplink signals (specifically, VoIP signals).

Abstract: A method of switching a radio resource mode allocated to a mobile station in a wireless access system is disclosed. The method for switching the radio-resource mode allocated to the mobile station in the wireless access system includes, transmitting information of a second radio-resource mode to a base station, thereby requesting a switching from a first radio-resource mode allocated to the mobile station to the second radio-resource mode, and re-requesting the switching of the radio-resource mode using a high-speed feedback channel, if a message approving the switching of the radio-resource mode is not received within a predetermined time. So, a variety of problems caused by inconsistency in operation mode between a mobile station receiving no control messages and the base station can be solved.

Abstract: A method for allocating resource regions in a wireless access system is provided. This method collectively allocates resources of consecutive frames. Specifically, a message, including allocation information used to collectively and consecutively allocate identical resource regions, is received from a base station and data is transmitted through the allocated resource regions. Unlike the conventional method, a resource region is not allocated in each frame but instead identical resource regions are allocated in multiple frames, thereby reducing MAP overhead in a network.

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 efficiently performing an initial access in an MS in a multi-carrier broadband wireless access system is disclosed. The method includes scanning a plurality of carriers supported by a BS, and selecting one of the scanned carriers as a first carrier and receiving an SFH of the first carrier. The SFH of the first carrier includes at least one of a field indicating load status of the first carrier and recommended network entry carrier information including information about a second carrier in good load status.

Abstract: A random access method in a wireless communication system is disclosed. The present invention includes transmitting a bandwidth request indicator and a quick access message from a mobile station to a base station and starting a timer having a timer value determined according to an acknowledgement from the base station.

Abstract: A method of transmitting/updating system informations is disclosed. The present invention includes transmitting channel descriptor transmission control information including an index of the system information classified into a plurality of groups to a terminal at a start timing point of an arbitrary control interval and transmitting the system information of a corresponding group to the terminal at a transmission timing point according to the index in the control interval. According to the above embodiments of the present invention, it is able to non-periodically perform scheduling on system informations classified by a base station. It is able to decrease an update time of system information as well as a time taken for network entry and initialization of terminals. And, it is able to obtain distributed effect of an initial ranging attempt in aspect of system.

Abstract: A method for scheduling broadcast messages to transmit system information is disclosed. This method for scheduling broadcast messages having system information classifies a plurality of system information into one or more groups. For example, the system information may be control information for a network entry and initialization of a mobile station, or a burst profile. Then, the scheduling method allocates different numbers of transmission times to the individual groups, and determines transmission start times of system information of the individual groups according to the allocated transmission times.

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: Disclosed is a method of displaying call information in a mobile communication terminal and a mobile communication terminal adapted to display call information. The method includes the steps of checking the call information when a call occurs, updating and storing the call information according to a status of the call, and displaying the updated call information.