Abstract:
Disclosed are a method and device for supporting Multicast Broadcast Service (MBS). The device for supporting MBS includes a ranging determiner, an MBS determiner, and a message generator. The ranging determiner determines an action state of a mobile station according to a ranging request of the mobile station. The MBS determiner determines whether the mobile station has an MBS flow. The message generator generates a ranging request message on the basis of the action state and MBS flow. When the mobile station has the MBS flow, the message generator adds an MBS indication bit, representing “the mobile station is an MBS mobile station”, into a ranging purpose indication TLV of the ranging request message.
Abstract:
The present invention relates to a system and to a method for efficiently managing at least one or more femto base stations (BSs) existing in a femto zone containing a plurality of femto cells and for managing the femto zone in a wireless communication network. The system and method of the present invention comprise: receiving a registration request from a first femto base station from among the femto base stations in the femto zone that share a backhaul link; storing the registration of the femto base station and determining the first femto base station as a master base station or a candidate base station in accordance with the registration request; and transmitting, to the first femto base station, a registration acknowledgement message which contains the maximum backhaul link capacity of the femto zone and master base station information if the first femto base station is determined to be master base station, or a registration acknowledgement message which contains master base station information and candidate base station information if the first femto base station is determined to be the candidate base station.
Abstract:
The present invention relates to a multicast and broadcast service (MCBCS) system and method. According to the present invention, the MCBCS system comprises: an MBS distribution DPF (Data Patch Function) for receiving MBS data from an MCBCS server/controller and distributing the data; an MBS synchronization controller for acquiring GRE (Generic Routing Encapsulation) for the MBS data from the MBS distribution DPF and then generating an MBS synchronization rule; an MBS synchronization executor for executing MBS synchronization on the MBS synchronization rule received from the MBS synchronization controller; and an MBS DPF for receiving MBS data from the MBS distribution DPF, packaging the MBS data into an MBS burst and then transmitting the data to an MS (Mobile station). As such, multicast and broadcast services can be provided efficiently.
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 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:
A method for transmitting pilots in a wireless communication system includes generating first two pilots for a first antenna. Second two pilots for a second antenna are generated by multiplying the first two pilots with two weight values respectively. The first two pilots are transmitted over two Orthogonal Frequency Division Multiplexing (OFDM) symbols via the first antenna. The second two pilots are transmitted over the two OFDM symbols via the second antenna, wherein each weight value is determined based on a value used to obtain a symbol index of a corresponding OFDM symbol of the two OFDM symbols within a slot. Symbol indexes for the two OFDM symbols are consecutive, and the two weight values are different with each other.
Abstract:
Disclosed is a portable internet system, and more particularly, to a method of supporting fast ranging upon handover. The method comprises calculating an action time based on a time when a handover confirmation message is received from a serving Radio Access Station (RAS), in a target RAS; and transmitting a fast ranging information message to a mobile station on the basis of the action time.
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 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:
Disclosed is a frame transmission method using precoding for supporting MU-MIMO, which facilitates to reduce overhead of a downlink frame in a wireless communication system of FDD method, and a base station supporting that method. The frame transmission method comprises calculating a precoding matrix of a present frame based on channel state information (CSI) of each mobile station and a precoding matrix of a prior frame; precoding a dedicated pilot and downlink data to be transmitted to the mobile station by the use of precoding matrix of the present frame; and transmitting a downlink frame including the precoded dedicated pilot and precoded downlink data to the corresponding mobile station.