Patent application number | Description | Published |
20090303969 | Apparatus and method for employing common control channel and broadcast channel in a broadband wireless communication system with frequency overlay - A broadband wireless communication system supporting frequency overlay is provided. Operations of a base station includes checking whether it is time to transmit a common control signal; switching positions of a first Common Control Channel and a second Common Control Channel applied to a previous transmission of the common control signal while mapping a common control signal to the first Common Control Channel and the second Common Control Channel positioned in different Frequency Assignments; and transmitting the common control signal via the first Common Control Channel and the second Common Control Channel that are switched. | 12-10-2009 |
20100002631 | APPARATUS AND METHOD FOR NOTIFYING CHANGE OF SYSTEM CONTROL INFORMATION IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for notifying a change of system control information in a wireless communication system are provided. The method includes, changing a Group Configuration Change Counter (GCCC) and upon change of a Secondary-Super Frame Header/Sub-Packet1 (S-SFH/SP1) whose transmission period is changeable within a range of one or more super frames, changing the GCCC and information representing the change of the common control message upon change of at least one common control message, and transmitting the GCCC and the information representing the change of the at least one common control message. | 01-07-2010 |
20100005358 | APPARATUS AND METHOD FOR SUPPORTING HYBRID ARQ IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for supporting Hybrid Automatic Repeat reQuest (HARQ) in a broadband wireless communication system are provided. A method of performing HARQ by a Mobile Station (MS) in a wireless communication system includes receiving a control message including resource allocation information, decoding the control message, if the decoding is successful, determining whether a previous control message is lost, and if the previous control message is lost, transmitting one of a null signal and a specific indicator through a response channel. | 01-07-2010 |
20100211845 | METHOD FOR PERFORMING HYBRID AUTOMATIC REPEAT REQUEST OPERATION IN A WIRELESS MOBILE COMMUNICATION SYSTEM - A method for performing a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless mobile communication system that uses Frequency Division Duplex (FDD) or Time Division Duplex (TDD) frames each having a plurality of subframes for communication are provided, in which an HARQ timing including a transmission time of a data burst and a transmission time of an HARQ feedback, for DL HARQ is determined according to data burst assignment information transmitted in a #l DownLink (DL) subframe of a #i frame, and an HARQ operation is performed according to the determined HARQ timing. At least one frame index and at least one subframe index that represent the HARQ timing are determined by using l and i. | 08-19-2010 |
20100232539 | Method and apparatus for transmitting control information for interference mitigation in multiple antenna system - A multiple antenna system including a mobile station and a base station are operable to perform a method for transmitting control information for interference mitigation. A Mobile Station (MS) can transmit control information for interference mitigation. The MS determines a first Precoding Matrix Index (PMI) and a second PMI for interference from an adjacent Base Station (BS). Based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, the MS determines a level of a subset of PMIs, and feeds back information indicating the correlation level. | 09-16-2010 |
20110069743 | Apparatus and method for configuring frame structure in relay wireless communication system - An apparatus and method for reduces an overhead caused by an operation transition gap in a Relay Station (RS) of a relay wireless communication system. The method includes identifying a signal delay time with an upper node. A transmission/reception operation transition time is determined through a negotiation with the upper node. An idle time is identified. An overhead caused by a transmission/reception operation transition is determined with consideration of a start time point of an Uplink (UL) subframe dependent on the signal delay time, the transmission/reception operation transition time, and the idle time. And communication is performed considering the overhead. The start time point of the UL subframe is set earlier than a start time point of a UL subframe of the upper node in consideration of the idle time. | 03-24-2011 |
20110090884 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SYSTEM INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmission/reception of system information in a broadband wireless communication system are provided. An operation of a Base Station (BS) in a broadband wireless communication system includes determining whether to apply a system configuration corresponding to a previous value of a Secondary-Super Frame Header (S-SFH) change count changed according to update of system information and, when applying the system configuration corresponding to the previous value of the S-SFH change count, setting a parameter representing the applied system configuration to a first value and, when applying a system configuration corresponding to a current value of the S-SFH change count, setting the parameter to a second value, and transmitting a Primary-Super Frame Header (P-SFH) including the S-SFH change count and the parameter set to the first value or the second value. | 04-21-2011 |
20110103270 | APPARATUS AND METHOD FOR CONFIGURING FRAME STRUCTURE IN FDD WIRELESS COMMUNICATION SYSTEM - An apparatus and method for reducing an overhead resulting from an transition gap in a Relay Station (RS) of a Frequency Division Duplex (FDD) wireless communication system are provided. The method includes determining transmission/reception transition time information through a negotiation with an upper node, identifying a signal delay time with the upper node, identifying a first reference time (R_Idle_Time), determining an overhead of a DownLink (DL) frame and an overhead of an UpLink (UL) frame resulting from transmission/reception transition in consideration of at least one of the transition time information, the signal delay time, the first reference time, and a second reference time (Idle_Time), and performing communication based on the overhead of the DL frame and the overhead of the UL frame. | 05-05-2011 |
20110110301 | APPARATUS AND METHOD FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe. | 05-12-2011 |
20110280202 | APPARATUS AND METHOD FOR INDICATING UPLINK RESOURCE ALLOCATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for indicating uplink resource allocation in a broadband wireless communication system are provided. The method includes decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe, extracting an indicator field value from the decoded UL resource allocation IE, the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location, and transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value. | 11-17-2011 |
20110310761 | APPARATUS AND METHOD FOR TRANSMITTING BROADCAST CHANNEL IN BROADBAND WIRELESS ACCESS SYSTEM - To transmit and receive system information of a base station in a broadband wireless access system, operations of the base station include determining transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes, determining transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset, and transmitting the subpackets respectively according to the transmission periodicities and the transmission offsets. | 12-22-2011 |
20120003978 | METHOD AND APPARATUS FOR CELL SELECTION IN WIRELESS COMMUNICATION SYSTEM - A Mobile Station (MS) operation method for cell selection at initial access in a wireless communication system in which one or more small Base Stations (BSs) are included within a macro BS service coverage area is provided. The method includes performing synchronization based on a preamble signal, after performing the synchronization, transmitting a ranging code to a first BS, after transmitting the ranging code, transmitting a ranging request message including position information of the MS, to the first BS, and receiving a ranging response message including information on at least one candidate BS from the first BS. Thus, the MS can select a BS using position information of the MS in a wireless communication system in which various types of BSs coexist. | 01-05-2012 |
20120008558 | APPARATUS AND METHOD FOR OPERATING A SOUNDING ANTENNA SWITCHING SCHEME IN A MOBILE COMMUNICATION SYSTEM - In a mobile communication system, an Advanced Mobile Station (AMS) sends, to an Advanced Base Station (ABS), a message including information indicating whether the AMS supports a sounding antenna switching scheme. If the information indicates that the AMS supports the sounding antenna switching scheme, the message including the information includes information indicating an antenna configuration that the AMS desires to use in a sounding antenna switching operation. | 01-12-2012 |
20120021742 | APPARATUS AND METHOD FOR PROVIDING IDENTIFICATION INFORMATION OF SMALL BASE STATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method select a segment for providing identification information of a small base station (BS) in a wireless communication system. A signal quality of each of a plurality of segments is determined. When at least one segment is not used by a macro BS, a segment of the worst signal quality is selected among the at least one segment that is not used by a macro BS. And the identification information is transmitted using the selected segment. The selected segment represents a resource for transmitting the identification information. | 01-26-2012 |
20140126449 | APPARATUS AND METHOD FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe. | 05-08-2014 |