Abstract:
PURPOSE: A base station device of an advanced mobile communication system is provided to supply a multimedia service having high transmission speed from a low voice speed in the advanced mobile communication system, and to supply a global roaming service, thereby giving a multimedia communication service without restrictions. CONSTITUTION: An RFS(Radio Frequency Subsystem)(210) performs upward/downward converting functions of RF/IF signals of a base station device. A BBS(Base Band Subsystem)(220) performs a base band modulation/demodulation signal process for a signal transmitted from the RFS(210) and a signal transmitted from a BIS(Base station Interconnection Subsystem)(230). The BIS(230) interfaces with a call processing, operation and maintenance, and an RNC(300) of the base station device. The BIS(230) performs a receiving space diversity function having two independent paths, a transmission space diversity function having two independent paths, and a function of remotely controlling, reporting, and controlling with a port for monitoring an RF signal.
Abstract:
PURPOSE: A sub-carrier allocation system for OFDM communication, an allocating method thereof, and a recording medium for storing an allocation program are provided to overcome a limit of an existing system by allocating a sub-carrier group of a terminal of an ascending order considering the sub-carrier group of the terminal of a descending order. CONSTITUTION: A base station(100) includes a transmitter, a receiver, an MCS(Modulation and Coding Scheme) collector, a priority allocator, and a sub-carrier allocator. The transmitter(150) and the receiver(110) are used for transmitting and receiving traffic and a control signal by using a terminal and a sub-carrier group. The MCS collector(120) is used for collecting MCS control signals. The priority allocator(130) is used for deciding the priority of a sub-carrier group by using MCS control data, and a sub-carrier allocator. The sub-carrier allocator(140) is used for allocating sub-carrier groups to each terminal. The terminal(200) includes a transmitter, a receiver, a channel state estimator, and an MCS selector. The transmitter(240) and the receiver(210) are used for transmitting and receiving MCS control data. The channel state estimator(220) is used for extracting the MCS control data of each sub-carrier group. The MCS selector(230) is used for selecting the sub-carrier group having the particular MCS.
Abstract:
PURPOSE: A method is provided to increase throughput of system traffic of down link in OFDMA(orthogonal frequency division multiple access)/FDD(frequency division duplex) communication system by transmitting MCS(modulation and coding scheme) related control data at a time. CONSTITUTION: A method comprises a first step of permitting a terminal to be allocated with the highest cluster group by a base station when a call is set between the terminal and a base station; a second step of permitting the terminal to check the position of the cluster having the best radio environment from among the lowest cluster group included in the cluster of the corresponding group; a third step of permitting the terminal to determine the cluster group level having a high similarity by judging the similarity of clusters of the lowest group with respect to the clusters of the group excluding the upper group including the cluster of the lowest group; a fourth step of permitting the terminal to compare radio environments of the clusters checked in the second step, and determine MCS level corresponding to the lowest radio environment; and a fifth step of permitting the terminal to transmit, to the base station, MCS related control data including the position of the cluster checked in the second step, cluster group level determined in the third step, and the MCS level determined in the fourth step.
Abstract:
PURPOSE: A scheduling method for processing traffic of multi calls in a wireless communication base station channel card is provided to select one of 8 time segments, and to distribute load of traffic processing, then to efficiently treat traffic processing of the multi calls, thereby efficiently managing the traffic processing as satisfying a 3GPP standard. CONSTITUTION: A scheduling system checks whether an active call exists in an FP DL(Frame Protocol Down Link) database(501). If so, the system brings a frame offset, a chip offset, and a value of a TTI(Transmission Timing Interval) from the call(502). If the chip offset is bigger than one time segment(503), the system sets a frame position to '1'(504). If the chip offset is smaller than one time segment, the system sets the frame position to '0'(505). The system compares a value of a current CEP(Channel Element Processor) is the same as '0'(506). If so, the system decides whether another value is the same as a current time segment value(507). If so, the system processes traffic data with an exclusive channel of the call, and transmits the data to an MDSP(Modulation Digital Signal Processor)(508).
Abstract:
PURPOSE: A system for processing and transmitting traffic in a base station and a method therefor are provided to receive and process received data frames by using a predetermined window, and to transmit the data frames to a mobile station, thereby preventing frame loss caused by receiving delay and improving service quality. CONSTITUTION: A traffic period confirmer(210) periodically confirms whether traffic frames received from a THM(Traffic Handling Module)(110) arrive according to a predetermined window. If the received traffic frames arrive faster than the predetermined window, a traffic storage(220) stores the traffic frames. A traffic processor and transmitter(230) processes the stored traffic frames according to a confirmed result, or processes the received traffic frames, transmits the frames to mobile stations(300-300n), and informs the THM(110) of information related to arrival time of the traffic frames.
Abstract:
PURPOSE: A base station device of an advanced mobile communication system is provided to supply a multimedia service having high transmission speed from a low voice speed in the advanced mobile communication system, and to supply a global roaming service, thereby giving a multimedia communication service without restrictions. CONSTITUTION: An RFS(Radio Frequency Subsystem)(210) performs upward/downward converting functions of RF/IF signals of a base station device. A BBS(Base Band Subsystem)(220) performs a base band modulation/demodulation signal process for a signal transmitted from the RFS(210) and a signal transmitted from a BIS(Base station Interconnection Subsystem)(230). The BIS(230) interfaces with a call processing, operation and maintenance, and an RNC(300) of the base station device. The BIS(230) performs a receiving space diversity function having two independent paths, a transmission space diversity function having two independent paths, and a function of remotely controlling, reporting, and controlling with a port for monitoring an RF signal.
Abstract:
PURPOSE: A method for managing a buffer for transport channel synchronization in a wireless communication system is provided to effective manage data coming within a process-available time window while processing traffic data. CONSTITUTION: It is checked how many buffers are turned on(401). It is checked whether the number of buffers is greater than 0(402). If the number of buffers is greater than 0, it is checked whether one buffer data with a flag ON comes within a window time(403). If one buffer data has come within the window time, the data is transferred to an MDSP(Modulator Digital Signal Processor) and the flog of the corresponding buffer is turned off(404). If one buffer data has not come within the window time, it is checked whether it has come later than a predetermined window time(405). If one buffer data has come later than the predetermined window time, the data is discarded and a flag is turned off(406). If one buffer data has come ahead of the predetermined window time, the data is stored in a corresponding buffer and a flag is maintained in an ON state(407). It is checked whether a value obtained by reducing one buffer is greater than 0(408). It is checked whether there exist data(409). If there is data, it is checked whether the data has come within the pre-set window time(410). If the data has come within the window time, the data is transferred to the MDSP(411). If the data has not come within the window time, a TA(Timing Adjustment) message is transferred to a traffic processor(412). It is checked whether certain data comes later than the pre-set window time(413). If the data has come later than the pre-set window time, the data is discarded(414). If the data has come ahead of the window time, the data is stored in an empty buffer and a flag is maintained to be ON(415).