Abstract:
PURPOSE: A method for controlling ATM switch duplexing within an RNC(Radio Network Controller) in a mobile communication system is provided to duplex boards and links related to switch control within the RNC, thereby continuously supplying a service even during a switching process at the request of an operator or when an error is generated in hardware or software. CONSTITUTION: An application layer performs initialization(401), and a middleware duplexing processor decides a duplexing state(402), to determine an operation mode(403) and a standby mode(404). In the operation mode(403), if the standby mode(404) is restarted, an SCP requests initial dump data of the operation mode(405). The operation mode extracts connection information(406), informs the standby mode of the initial dump data(407), and stores connection information for backup in a duplexing data region(408). If a connection setup/cancellation request is received from an ACP(409), an application layer of the operation mode generates backup data(410), and transmits a connection setup/cancellation processing result to the ACP(411), then requests duplexing data backup to the standby mode(412). The standby mode stores the connection information for backup in the duplexing data region(413), and informs the operation mode of a backup processing result(414).
Abstract:
PURPOSE: An encoding and decoding block structure for reducing process delay time of a CELP vocoder and an encoding and decoding method using the structure are provided to divide an encoding block into sub-modules to process the encoding block to decrease the entire delay time of a system. CONSTITUTION: An encoding block is divided into a plurality of sub-modules(31) having a predetermined quantity of calculation corresponding to encoding process delay time determined in one frame, and encoding is executed for each of the sub-modules. A decoding block is divided into sub-frames(32) that are determined based on one frame between the sub-modules, and decoding is carried out by the sub-frames. When process delay time of one frame is 20ms, the encoding block is divided into eight sub-modules each of which has the processing time of 2ms, and the decoding block is divided into four sub-frames each of which has the processing time of 1ms. A sound signal is encoded and decoded through the encoding and decoding block.
Abstract:
PURPOSE: A predicting system and method for encoding or decoding a video signal are provided to reduce the volume of the predicting system and use one system for both of encoding and decoding processes. CONSTITUTION: A predicting system for encoding or decoding a video signal includes a packet variation detector(410), a prediction basic value provider(420), and a prediction calculator(430). The packet variation detector judges whether or not a prediction basic value used for prediction of a block for which prediction is currently performed belongs to the same packet as the current block. The prediction basic value provider provides the prediction basic value. The prediction calculator outputs a prediction encoding value or prediction decoding value using the prediction basic value provided by the prediction basic value provider and a discrete cosine transform coefficient of the current block according to an operation mode.
Abstract:
PURPOSE: A call processing method for processor duplexing in a wireless communication system is provided to restore data of an active board in a standby board and synchronize the two boards when they are needs to be switched due to the occurrence of failure. CONSTITUTION: Initialization is performed to load a task and data related to call information are all backup(201). When a message is received, it is checked whether the message is a normal message or a duplexing related message(202). If the received message is the normal message, it is processed in an original routine and dynamic data are updated(203,204). If the received message is the duplexing related message, a standby board is switched to an active board and a dynamic/static data restoration and data synchronization algorithm is executed(205-207).
Abstract:
본 발명은 이진 로그맵 알고리즘(Binary LogMAP Algorithm)을 이용한 터보 복호기 및 그 구현 방법과 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것으로, 이진 LogMAP 알고리즘을 사용하여 터보 복호기를 구현하는 경우에, 기존의 LogMAP 알고리즘에서 사용되었던 복잡한 E 함수를 대신하여, 하드웨어의 구현이 용이한 2 함수를 사용하며, 이의 계산에 ABELA를 적용하여 작은 하드웨어를 가지면서도 정밀도가 높은 복호기를 구현할 수 있으며, 또한 순방향 및 역방향 상태 메트릭 값의 계산에 있어서 필요한 연산량을 줄이고 LLR의 계산을 고속으로 수행할 수 있어 기존의 LogMAP 방식의 터보 복호기에 비하여 작은 하드웨어를 필요로 하면서도 고속의 복호가 가능한 터보 복호기를 구현할 수 있다.
Abstract:
본 발명은 확산 스펙트럼 통신용 복조기에 사용될 수 있는 상관기에 관한 것으로, 확산 스펙트럼 통신용 신호 복조에 사용되는 복조기가 STTD 디코딩을 지원할 수 있도록 복조기 내에 STTD 디코더가 포함되어 있으며, 상기 STTD 디코더는 하나의 곱셈기와 하나의 적분기를 사용함으로서 배치면적이 작고, STTD 모드인지 아닌지에 따라 STTD 디코더의 동작을 간단히 조절할 수 있어 가변신호처리에도 적합한 것을 특징으로 한다.
Abstract:
PURPOSE: A carrier separating apparatus and method of a multi-carrier radio communication receiving system are provided to reduce the number of quantizers by separating carriers after its quantization, and easily control power of a carrier by equalizing a frequency power of each carrier by rendering the number of frequency down adjustments to be the same. CONSTITUTION: An internal oscillation(NCO) block(210) generates internal multi-carriers in order to separate the multi-carriers from a received signal. A multiplier block(240) down-converts each of the multi-carriers generated by the internal oscillation(NCO) block(210) and moves them to a frequency of 0. A low frequency band pass filter block(250) filters each carrier moved to the frequency of 0 by the multiplier block(240) to a low frequency pass band to delete information of an unnecessary band and provides its own carrier information as an input of a rake receiver(300).
Abstract:
PURPOSE: An apparatus for performing an interleaving/deinterleaving including an address generator and a method thereof, and a channel encoder system using the same are provided, which reduce a memory size by 40% required in an IMT-2000 modem, and enables one-chip of the modem by reducing the memory size by performing the interleaving/deinterleaving with one memory. CONSTITUTION: Inputted data stream of a source is encoded through an encoder(110) using a convolutional coding or a turbo coding, and an interleaving is performed through an interleaver(120). Then the data stream is modulated properly through a modulator(130) and then is transmitted through a channel(140). Then, the transmitted data is received and demodulated through a demodulator(150), and a deinterleaver performs a deinterleaving of the demodulated data and then the source data of a transmitter side is recovered through a decoder(170).
Abstract:
본발명은단일필터구조에서 4개의 1 비트입력 1:4 인터폴레이션 FIR 필터연산을동시에처리하는 FIR 필터 2개를사용하여 4 채널용멀티비트입력에프아이알필터를구현한 QPSK 변조장치에관한것이다. 이러한 4 채널용멀티비트입력에프아이알필터를이용한직각위상천이키잉변조장치는, 4 채널로부터각각입력되는 1 비트데이터들을분기하여의사잡음확산시켜서 8개의 1비트데이터를생성하는의사잡음확산수단과, 상기 8개의 1비트데이터를입력받아펄스성형을위한필터링을수행하는 FIR 필터링수단과, 상기 FIR 필터링수단에서필터링된출력들에각 채널별이득을곱하여 n비트의데이터를출력하는승산수단과, 상기승산수단에서출력되는 n비트데이터를직교위상천이키잉변조하여 I채널신호와 Q채널신호를출력하는가산수단을포함한것을특징으로한다.