Abstract: The present invention relates to a method and to an apparatus for controlling the scheduling in a radio communication system, which comprise calculating a first resource value for a first data packet using packet information of the first data packet, determining an MCS level and a transmission power density for the first data packet and a second data packet using a resource allocation parameter for the first data packet and packet information of the second data packet, calculating a second resource value for the first data packet and the second data packet using the MCS level and the transmission power density determined in the previous step, and allocating the second resource value for the first data packet and the second data packet as an uplink resource if the second resource value is not greater than the total number of allocable resources of an uplink frame.

Abstract: The present invention relates to an apparatus and to a method for acquiring downlink channel information in a radio communication system having a multi-cell/sector structure, comprising receiving channel quality information of a mobile station and loading information of cells/sectors adjacent to the mobile station, checking the carrier to interference and noise ratio (CINR) contained in the channel quality information, checking the average loading factor of the adjacent cells/sectors contained in the loading information, summing the average loading factors for each of the adjacent cells/sectors to calculate an effective loading factor, and compensating for the CINR with the effective loading factor to acquire channel information of the base station.

Abstract: The present invention relates to a method for uplink power control in an OFDMA TDD system. The method for uplink power control according to the present invention comprises: calculating an RSSI average by using RSSI measured from a downlink signal; and carrying out an uplink power control based on the RSSI average, with the RSSI average being calculated by using a weight that is determined depending on a channel variation rate and link symmetry.

Abstract: The present invention relates to a transmission device and method using space-frequency transmission diversity in a communications system. The transmission device and method using space-frequency transmission diversity according to the present invention is characterised in that data or signals are grouped into 2 or more groups which are then transmitted through different transmission antennae by using different sub-carriers.

Abstract: The present invention relates to a portable internet radio access station, and more particularly, to a portable internet radio access station including a plurality of management processors and a method of controlling the plurality of management processors.

Abstract: Disclosed is an apparatus and a method for detecting a boundary of a frame in a wireless communication system. The apparatus includes: a controller for measuring correlation energy with preambles with respect to received signals transmitted from a transmitter, measuring strength of the received signals, and removing a sample from frames constituting the received signals, the preambles predetermined and used by the system, the sample having a ratio of the correlation energy with respect to the strength of the received signals, the ratio being smaller than a reference value; and a classifier for extracting a maximum value from the correlation energy received from the controller, and determining a boundary of a downlink of the frames constituting the received signals.

Abstract: The present invention relates to a method and to an apparatus for allocating a bandwidth in a wideband wireless communication system. Said method comprises: allocating a bandwidth to an uplink burst area in accordance with the bandwidth request received from at least one terminal; determining whether a preemptive grant bandwidth allocation is enabled or not; determining a preemptive grant terminal if the preemptive grant bandwidth allocation is enabled; and allocating a preemptive grant bandwidth within a residual bandwidth to the determined preemptive grant terminal. By doing this, the present invention can efficiently use the bandwidth of an uplink frame, and shorten the time taken for bandwidth request/approval between a terminal and a base station.

Abstract: Disclosed is a broadband wireless network, and more particularly, to a method for transmitting and receiving a TCP ACK packet, and a device supporting the same, wherein the method for transmitting and receiving a TCP ACK packet receiving TCP ACK packets and data packets from an upper layer; creating a MAC PDU by unifying the TCP ACK packet and data packet buffered in the same queue among the received TCP ACK packets and data packets; and transmitting the MAC PDU to a physical layer.

Abstract: Disclosed is a method and apparatus for mitigating uplink interference in the wireless communication system, wherein the method comprises determining a loading-status value for each sector; if the loading-status value is not greater than the first threshold value, generating UL zone switch IE and UL allocation start IE to allocate data bursts of the sectors to different subchannels; and preparing an uplink map using the UL zone switch IE and UL allocation start IE for each sector, wherein the uplink duration indicates a duration where all the subchannels are used for allocation of the data burst.

Abstract: This invention relates to a device and a method for transmitting channel information in a wireless communication system. The disclosed device and method are characterized by: estimating channels by dividing the channel matrix elements for a complex channel into a real number part and an imaginary number part; quantizing each channel which is estimated through the division into the real and imaginary number parts based on a preset boundary value; generating the channel information corresponding to the quantization value for the real and imaginary number parts of the channel matrix elements; and transmitting the generated channel information to a transmitter.

Abstract: Disclosed are an apparatus and a method for controlling ranging in a wireless communication system. The apparatus according to the present invention comprises a Radio Frequency (RF) module converting RF band signals received via antenna to low-frequency band signal; a Fast Fourier Transform (FFT) module converting the low-frequency band signal of time-domain to frequency-domain signal; a derandomizer performing derandomizing the frequency-domain signals by using a random sequence being transmitted by the terminals; a depermutation module combining the frequency-domain signals output from the derandomizer by unit of burst and outputting the combined signal; and a ranging controller controlling periodic ranging of the terminal corresponding to the respective bursts by estimating phase change in the frequency-domain signals of burst unit.

Abstract: Disclosed is a mobile internet system, and more particularly, to a method and apparatus for supporting a multicast broadcast service (MBS) over WIMAX. The MBS supporting method of the present invention comprises assigning a first GRE key to a first MBS service flow for a first MS, and delivering MBS contents having the first MBS service flow through the use of first GRE key; and if a second MBS service flow for a second MS is the same as the first MBS service flow, delivering MBS contents having the second MBS service flow through the use of first GRE key pre-assigned to the first MBS service flow.