| Patent application number | Description | Published |
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| 20080219415 | APPARATUS AND METHOD FOR PROVIDING A VOICE MESSAGE IN A COMMUNICATION SYSTEM - A method and apparatus for providing a voice message in a communication system are provided. Upon receiving a request message for providing a voice message to a calling terminal, a caller information detector determines whether the request message includes language select information indicating a language of a voice message to be provided to the calling terminal, and detects caller information included in the request message when the language select information is not included. A voice message reproducer selects a language of a voice message to be provided to the calling terminal using the detected caller information, and transmits a voice message corresponding to the selected language to the calling terminal. Accordingly, the calling terminal can receive voice messages in a language appropriate for the user. | 09-11-2008 |
| 20080232319 | SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING RESOURCE ALLOCATION INFORMATION IN A WIRELESS MOBILE COMMUNICATION SYSTEM - A system for transmitting/receiving resource allocation information in a wireless mobile communication system is provided. A transmission apparatus allocates a data burst in a frame, the data burst including a two-dimensional region of a time domain and a frequency domain, and transmits resource allocation information on the allocated data burst. A reception apparatus receives the resource allocation information from the transmission apparatus, and detects a region of the frame where the data burst is allocated, using the received resource allocation information. The resource allocation information includes information on a start point and an end point of the data burst. The start point indicates a point which is spaced apart from an start point of the frame by a first offset value in the time domain, and is spaced apart from the start point of the frame by a second offset value in the frequency domain. The end point indicates a point which is spaced apart from the start point by a third offset value in the time domain, and is spaced apart from the start point by a fourth offset value in the frequency domain. The data burst is a two-dimensional rectangular region having a diagonal line segment connecting the start point to the end point. | 09-25-2008 |
| 20080242340 | Method for supporting fast base station switching in a wireless communication system using multiple frequency bands - A method for performing fast base station switching in an mobile station capable of using multiple frequency assignments in a wireless communication system are provided, in which initial network entry to a base station managing at least two frequency assignments is performed in one of the at least two frequency assignments, overlay mode support information and FA information about the at least two frequency assignments are acquired by the initial network entry, the overlay mode support information indicating whether the base station supports multiple frequency assignments, the base station is notified that the mobile station will operate in an overlay mode using multiple frequency assignments based on the acquired information, and signals are transmitted and received to and from the base station in the at least two frequency assignments. | 10-02-2008 |
| 20080305798 | HANDOVER METHOD IN A WIRELESS MOBILE COMMUNICATION SYSTEM AND A SYSTEM THEREFOR - A handover method of a mobile station in a wireless mobile communication system and a system therefore are provided. The mobile station transmits a handover indication message to a serving base station, receives a ranging response message that comprises authentication information required for the mobile station to authenticate a target base station, receives fast ranging resources and transmits a ranging response acknowledgement (ACK) message, which comprises authentication information required for the target base station to authenticate the mobile station, to the target base station after receiving the fast ranging resources. Accordingly, a handover break time is minimized. | 12-11-2008 |
| 20090054066 | HANDOVER SYSTEM AND METHOD IN A WIRELESS MOBILE COMMUNICATION SYSTEM - A handover method of a Mobile Station (MS) and a wireless mobile communication system are provided. The handover method includes sending a handover request message to a Serving Base Station (BS), receiving a handover response message including handover Target BS information and an entire Cipher-based Message Authentication Code (CMAC) value corresponding to a first number of bits, from the Serving BS in response to the handover request message, storing a partial CMAC value corresponding to a second number of Most Significant Bit (MSB) bits in the entire CMAC value, sending to the Serving BS a handover indication message including the entire CMAC value and information on a Target BS to which the MS has determined to handover, selecting a ranging code using the partial CMAC value, and sending the selected ranging code to the Target BS. | 02-26-2009 |
| 20090196257 | APPARATUS AND METHOD FOR PERFORMING HANDOVER OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM - Provided are an apparatus and a method for performing a handover of a terminal in a wireless communication system. In the method, a ranging code is transmitted to a target base station on which a handover is to be performed. A ranging response message comprising Connection Identification (CID) update information is received from the target base station together with resource assignment information for transmission of a ranging request message. Therefore, fast resumption of downlink data reception of the terminal can be supported through fast CID update during a handover. | 08-06-2009 |
| 20090207809 | APPARATUS AND METHOD FOR REDUCING HANDOVER DELAY IN BROADBAND WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for reducing a handover delay in a broadband wireless communication system are provided. In a method for operating a terminal to reduce a handover delay in a broadband wireless communication system, a handover procedure is performed with a serving Base Station (BS) to obtain a dedicated ranging code and a Connection ID (CID). The dedicated ranging code is transmitted to one or more target BSs using the CID. Whether the dedicated ranging code is received is determined. Therefore, a handover delay and a chance of malfunction can be reduced. | 08-20-2009 |
| 20090221290 | System and method for transmitting and receiving a signal using multiple frequency bands in a wireless communication system - Disclosed is a system and a method of signal transmission/reception by a mobile station in a wireless communication system. The method includes: transmitting a first sub-band preparation indicator, which indicates that the mobile station has been prepared for transmission/reception of a signal through a first sub-band, to a base station through a primary band; transmitting a first sub-band failure indicator to the base station through the primary band upon detecting failure in transmitting the first sub-band preparation indicator; receiving sub-band information on a second sub-band, which is different from the first sub-band, from the BS through the primary band; and acquiring synchronization with the second sub-band, so as to enable transmission/reception of a signal through the second sub-band based on the sub-band information. | 09-03-2009 |
| 20100003985 | APPARATUS AND METHOD FOR PERFORMING HANDOVER IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for handover in a wireless communication system are provided. The handover method includes, when handing over to another Base Station (BS) while being serviced by a serving BS, determining whether there exists data to transmit in an uplink, and, when the data to transmit in the uplink exists, requesting bandwidth from the serving BS before commencing a network re-entry to a target BS for the handover. | 01-07-2010 |
| 20100008327 | APPARATUS AND METHOD FOR ASSIGNING MOBILE STATION IDENTIFIER IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for providing a handover using an Mobile Station IDentifier (MS ID) in a wireless communication system are provided. In the method, at least one Base Station (BS) ID index assigned to a serving base station by at least one neighbor base station is confirmed. A target base station for a handover is confirmed. A temporary MS ID is formed using a BS ID index assigned to the serving base station by the target base station, and an MS ID index assigned to the mobile station by the serving base station. A network re-entry procedure with the target base station is performed using the temporary MS ID. Communication with the serving base station is performed until the network re-entry procedure with the target base station is completed. | 01-14-2010 |
| 20100220641 | METHOD FOR OPERATING CONTROL SLEEP MODE IN A COMMUNICATION SYSTEM - A method for controlling a sleep mode operation by a Mobile Station (MS) in a communication system. The MS includes transitioning to an awake state in a listening interval of the sleep mode; performing any one of a first operation, a second operation and a third operation in the awake state; and after any one operation is performed, transitioning to a sleep state upon detecting that there is no data to transmit to the BS and there is no data to be received from the BS. The first operation is a process of receiving data from the BS, the second operation is a process of transmitting data to the BS, and the third operation is a process of receiving data from the BS and receiving data from the BS. | 09-02-2010 |
| 20100269006 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING AUTOMATIC REPEAT REQUEST FEEDBACK MESSAGE IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting and receiving an Automatic Repeat reQuest (ARQ) feedback message in a wireless communication system are provided. A method for receiving an ARQ feedback message at a transmitting unit in a wireless communication system includes allocating a fixed-size resource for transmitting an ARQ feedback message, to a receiving unit, the resource being an unsolicited bandwidth, and receiving an ARQ feedback message or a resource request message from the receiving unit over the fixed-size resource allocated. | 10-21-2010 |
| 20110128935 | APPARATUS AND METHOD FOR HANDOVER OF MS IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for handover of a Mobile Station (MS) in a wireless communication system are provided. The method includes, if a ranging request signal is received from the MS attempting access through a handover, determining if the BS and a serving BS of the MS are the same BS based on the ranging request signal, and, if the BS and the serving BS are the same BS, determining the effectiveness of a Cipher-based Message Authentication Code (CMAC) included in the ranging request signal using previous authentication information of the MS. The serving BS denotes a BS from which the MS has been serviced before the handover. The previous authentication information of the MS denotes authentication information that the serving BS has used for authenticating the MS. | 06-02-2011 |
