Abstract: In a method of configuring connection identifier (CID) update information in a broadband wireless access (BWA) communication system where each service between an mobile station (MS) and a base station (BS) has a unique CID, a registration request message is received from the MS, requesting updating of at least one old CID used for the MS. The CID update information is configured to include a bitmap area indicating whether a service corresponding to the at least one old CID is available, and a new CID area including at least one new CID in correspondence with a predetermined bit value in the bitmap area.

Abstract: A system and method for state synchronization between a base station and a mobile station in a mobile communication system. A count value indicative of a state change of the base station is received. The received current count value is compared with a previous count value previously received and stored. If the current count value is different from the previous count value, the mobile station performs a network entry procedure with the base station.

Abstract: A method for allocating a band Adaptive Modulation and Coding (AMC) channel in a wireless communication system that divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of neighbor subcarrier bands. Upon recognizing a need for a band AMC channel, a subscriber station (SS) sends a request for allocation of the band AMC channel to a base station (BS). Upon receiving the band AMC channel allocation request, the BS determines if it can allocate the band AMC channel requested by the SS, considering a resource situation of the BS, and transmits information on the determination to the SS.

Abstract: A handover method and system in a communication system. In the method, a serving Base Station (BS) broadcasts neighbor BS information including BS identifiers and preamble indices of a plurality of neighbor BSs, receives a handover request message from a Mobile Station (MS), the handover request message including a first set of at least one BS identifier and at least one preamble index for at least one neighbor BS among the plurality of neighbor BSs, and transmits a handover response message to the MS, the handover response message including a second set of at least one BS identifier and at least one preamble index for at least one recommended neighbor BS.

Abstract: A method and system for allocating data bursts in a wireless communication system. The system has a frame set by a symbol interval axis and a frequency band axis. The frame includes a first region in which a MAP message is transmitted and a second region to which the data bursts are allocated. A third region based on a symbol interval and a frequency band is set in the second region. The data bursts are sequentially allocated to the third region from a first symbol interval along the frequency band axis.

Abstract: A method for controlling an idle mode in a broadband wireless access (BWA) communication system. A mobile station (MS) transmits to a base station (BS) a de-registration request (DREG-REQ) indicating a state transition request to the idle mode. The BS transmits to the MS a de-registration command (DREG-CMD) for commanding state transition to the idle mode. The MS transmits to the BS a de-registration acknowledgement (DREG-ACK) in response to the DREG-CMD.

Abstract: Provided is a method for receiving a notification indicating a completion of a network re-entry procedure by a Base Station (BS) in a communication system. The method includes transmitting, to a Mobile Station (MS), a RaNGing ReSPonse (RNG-RSP) message including information indicating whether to omit any of processes or transmission of messages for performing a network re-entry procedure with the BS; and receiving, from the MS, a notification indicating the completion of the network re-entry procedure.

Abstract: A method is provided for transmitting a Media Access Protocol (MAP) message in a wireless communication system. A base station transmits the MAP message including operation mode information indicating a data burst allocation scheme, to a mobile station. The mobile station identifies a data burst according to the operation mode information included in the MAP message received from the base station.

Abstract: A method and mobile subscriber station in a broadband wireless communication system, wherein a receiver receives configuration information including a type field representing a type of a reduced connection identifier (CID) from a base station, and selectively applies the reduced CID based on the type field. The type of the reduced CID is determined based on a range of a basic CID of the mobile subscriber station connected to the base station. The type field includes at least two bits representing one of use of the basic CID and available types of the reduced CID. The available types represent available lengths of the reduced CID, and the reduced CID includes n Least Significant Bits (LSBs) of the basic CID, where n is a positive integer indicated by the type field.

Abstract: Provided is a system and method for notifying completion of a network re-entry procedure in a communication system. In the system, a mobile station (MS) completes the network re-entry procedure with a base station (BS), and then notifies the completion of the network re-entry procedure to the BS.

Abstract: A method is provided for transmitting a MAP message in a wireless communication system. A base station transmits the MAP message including operation mode information indicating a data burst allocation scheme, to a mobile station. The mobile station identifies a data burst according to the operation mode information included in the MAP message received from the base station.

Abstract: A method for allocating a channel quality information channel (CQICH) in a communication system is disclosed. After fast switching from a serving anchor base station (BS) to a target anchor BS, a mobile station (MS) detects absence of a CQICH allocated from the target anchor BS. Upon detecting the absence of the allocated CQICH, the MS sends a request for allocating the CQICH to the target anchor BS. Upon receiving the CQICH allocation request, the target anchor BS detects a need to allocate a CQICH to the MS.

Abstract: A method for requesting allocation of a Channel Quality Information Channel (CQICH) by a Mobile Station (MS) in a communication system. The method includes switching, by the MS, from a serving anchor Base Station (BS) to a target anchor BS, detecting an absence of a CQICH allocated from the target anchor BS, and transmitting, from the MS to the target anchor BS, a CQICH allocation request. The CQICH allocation request includes a CQICH allocation request header including a basic Connection IDentifier (CID) of the MS and a Header Check Sequence (HCS) for the CQICH allocation request header.

Abstract: Disclosed is a method and system for forming and transmitting to an MS a broadcast message for notifying information of neighbor BSs in a BWA communication system. The method includes scanning neighbor base stations adjacent to the serving base station, collecting information of the scanned neighbor base stations, comparing a size of the information of the scanned neighbor base stations with a size of a frame for carrying the information of the neighbor base stations constructing at least one broadcast message that includes the information of the neighbor base stations according to a result of the comparison, setting up fields of the constructed broadcast message according to information included in the constructed broadcast message and broadcasting the broadcast message including the setup fields.

Abstract: A system for providing communication when a mobile station moves between a wireless LAN system and a mobile communication system. A packet data service node provides a packet data service between an IP network and the mobile station when the mobile station accesses the mobile communication system. A packet control function provides the packet data service between a correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the mobile communication system is connected to an access point, and provides the packet data service between the correspondent node connected to the IP network and the mobile station when the mobile station previously connected to the access point is connected to a base station system. An interworking server connected between the access point of the wireless LAN system and the packet control function of the mobile communication system.

Abstract: A handover method and system in a communication system. In the method, a serving Base Station (BS) broadcasts neighbor BS information including BS identifiers and preamble indices of a plurality of neighbor BSs, receives a handover request message from a Mobile Station (MS), the handover request message including a first set of at least one BS identifier and at least one preamble index for at least one neighbor BS among the plurality of neighbor BSs, and transmits a handover response message to the MS, the handover response message including a second set of at least one BS identifier and at least one preamble index for at least one recommended neighbor BS.

Abstract: Disclosed is a method for performing handoff by a Mobile Station (MS) in a Broadband Wireless Access (BWA) communication system including a serving Base Station (BS) and at least one neighbor BS adjacent to the serving BS, the serving BS currently providing a service to the MS. The method including receiving physical layer information for communication from said at least one neighbor BS by the serving BS; combining by the serving BS the received physical layer information of said at least one neighbor BS, inserting the physical layer information into an advertisement message, and transmitting the advertisement message to the MS; and receiving by the MS the advertisement message, and performing a handoff according to the physical layer information of said at least one neighbor BS included in the advertisement message when the handoff occurs.

Abstract: Disclosed are a system for transmitting data using a band AMC in a broadband wireless orthogonal frequency multiplexing access system and a method thereof. In a broadband wireless communication system, a method for allocating data bursts to a mobile subscriber station according to channel state in a broadband wireless communication system, the method including transmitting allocation information to the mobile subscriber station, the allocation information including information about a sub frequency band containing the data bursts allocated to the mobile subscriber station and information about the number of band AMC subchannels allocated to the mobile subscriber station in the sub frequency band and receiving the data bursts from the mobile subscriber station according to the allocation information.

Abstract: Disclosed is a handover system in a BWA communication system. In the system, a serving BS broadcasts neighbor BS information including BS identifiers of a plurality of neighbor BSs and reference signal indices indicating reference signals used by the neighbor BSs, a MS receives the neighbor BS information and requests a scanning interval to the serving BS at a timing point at which the MS wants to perform a scanning, the serving BS allocates the scanning interval to the MS in response to a request for the scanning interval, and the MS scans reference signals received from the neighbor BSs during the scanning interval in response to the neighbor BS information.

Abstract: An apparatus and method for controlling operation states of a medium access control layer by a mobile subscriber station (MSS) in a broadband wireless access communication system. The method includes: state-transitioning into a sleep state or an idle state when there is no data transmitted between a base station and the MSS during a predetermined first time interval in an awake state; and performing a location change in the idle state when the mobile subscriber station moves from a first paging zone to a second paging zone, and state-transiting into the awake state when the mobile subscriber station in the idle state detects a paging to the mobile subscriber station. The method minimizes power consumption and maximizes efficiency in use of radio resources.