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).
Abstract:
PURPOSE: A duplex board system and a method for switching duplex boards thereof are provided to instantly switch an active state board to a standby state board when abnormality is generated in the active state board in hardware, and switch the active state board and the standby state board in software. CONSTITUTION: The second duplex board(20) connects with the first duplex board(10) through communication channels(42,43). A cell bus(30) having a multicasting function is a communication bus between the first or second duplex board(10,20) and another board. The first and second duplex boards(10,20) generate signals for switching active and standby states by a state value decided by their hardware abnormal state and state control signals capable of being controlled in software, and a state value of an object board.
Abstract:
PURPOSE: A clock group monitoring and selecting circuit is provided to simultaneously receive two clock groups from external clock boards, and to monitor whether the two clock groups are normal, then to supply a normal clock group to a modem, thereby stabilizing clocks distributed to the system modem. CONSTITUTION: The first and second clock receivers(110,120) receive the first and second clock groups consisting of many clocks from external clock boards. The first and second clock monitors(210,220) check states of the received first and second clock groups, respectively, and output result signals. A clock selector(300) selects the received first and second clock groups according to outputted state monitor information of the first and second clock groups, and outputs the selected clock groups. The first and second clock monitors(210,220) include retriggerable monostable multi-vibrators as many as the number of clocks included in the first and second clock groups. The retriggerable monostable multi-vibrators monitor the clock groups, and generate high-level signals if the clock groups are not inputted, then generate low-level signals if the groups are inputted.
Abstract:
본발명은보다단순하고경제적인모바일프론트홀구축및 운용이가능한아날로그무선광섬유(radio over fiber) 기반광 전송방식을원격무선유닛에적용하여디지털유닛과무선광섬유를통해통신하되, 각기다른 IF 주파수로다중화된 IF 광신호를 RF 신호로변환하고수신 RF 신호를각기다른 IF 주파수로다중화된 IF 신호로변환하는과정에서, 미리정의한동일한 IF 주파수(f)로변환하는과정을거치게함으로써대역통과필터의적용을용이하게하는, 이동단말들과무선통신을지원하는원격무선유닛및 그방법에관한것이다.
Abstract:
The present invention relates to a signal transmission control method capable of reducing power consumption and interference in a wireless communication system and an apparatus thereof. The signal transmission control method according to an embodiment of the present invention includes the steps of: broadcasting the information of a full discontinuous signal transmission duration period and the information of a discontinuous signal transmission period; and stop transmitting down-link control signals and data during at least a part of the discontinuous signal transmission period. [Reference numerals] (AA) DST instruction information
Abstract:
PURPOSE: A method for performing communication is provided to more efficiently manage wireless resources by the situation. CONSTITUTION: A base station transmits uplink resource allocation control information including transceiving timing information in a I-th sub frame of i-th frame(S603). An MS(Mobile Station) determines the transmission timing(S605). According to the determined transmission timing, a frame index j for transmitting an HARQ packet is determined. An uplink HARQ packet is transmitted in m-th sub frame of j-th frame(S607).
Abstract:
PURPOSE: A method and apparatus for retransmission are provided to improve the retransmission device performance by rapidly performing retransmission related operations. CONSTITUTION: A method for retransmission comprises: receiving a data burst transmitted by occupying at least one sub frame from the other one of the terminal and the base station(S510); determining a transmission timing for transmitting a feedback signal based on a value determined by transmission information of the data burst including the number of sub frames occupied by the data burst and a frame offset; transmitting the feedback signal to the other one of the terminal and the base station at the transmission timing(S520); and receiving the data burst retransmitted from the other one of the terminal and the base station if an NACK message is included in the feedback signal(S530).