Abstract:
탬퍼 시도로부터 데이터를 효과적으로 방어할 수 있으며, 외부 요인에 의하여 데이터 훼손 시 해당 데이터를 손쉽게 복구 가능케 하는 마이크로 컨트롤러를 이용한 데이터 처리 기술이 개시된다. 이를 위해, 본 발명에 따른 마이크로 컨트롤러를 이용한 데이터 처리 장치는 탬퍼 시도를 감지하는 탬퍼 감지부; 상호간에 통신 채널로 연결되며, 데이터를 상호 중복하여 저장하고 있는 복수개의 마이크로 컨트롤러; 및 복수개의 마이크로 컨트롤러 각각에 전원을 공급하는 백업 배터리부를 포함하며, 탬퍼 감지부에서 탬퍼 시도가 감지된 경우, 복수개의 마이크로 컨트롤러가 저장하고 있는 데이터를 삭제하며, 복수개의 마이크로 컨트롤러 중 특정 마이크로 컨트롤러에 저장된 데이터가 훼손되는 경우, 특정 마이크로 컨트롤러가 다른 마이크로 컨트롤러로부터 훼손된 데이터와 동일한 데이터를 전송받아 데이터 복원을 진행하는 것을 특징으로 한다.
Abstract:
PURPOSE: A method for reducing delay of a voice transmission in a digital voice communication system is provided to abandon data whose packet data rate in a wireless terminal is less than a predetermined rate, when voice delay occurs, thereby reducing the voice delay. CONSTITUTION: A wireless terminal measures a recovery time whenever a voice block is generated(10). The wireless terminal compares the recovery time with a reference value(12). If the recovery time exceeds the reference value, the wireless terminal stores packet data only whose data rate is more than a predetermined rate among packet data generated from a vocoder, and generates the voice block(16). If the recovery time is less than the reference value, the wireless terminal stores all the packet data, and generates the voice block(14). The wireless terminal transmits the generated voice block to a TCP layer(18).
Abstract:
Provided are a relay capable of preventing undesired white noise from being additionally amplified and a method for protecting information of a wireless channel user using the relay. The relay includes: a demodulator which receives signals from a transmitting end and a receiving end, decodes the received signals, and removes white noise added to the received signals; a reconstruction unit which applies, to a signal outputted by the demodulator, channel gain between the transmitting end and a relay, channel gain between the transmitting end and the receiving end, and channel gain between the receiving end and a relay to reconstruct a signal to be transmitted; and a modulator which encodes the signal to be transmitted which is reconstructed by the reconstruction unit and sends the encoded signal to the receiving end. Thus, a cooperative relay receives an artificial noise and decodes and reconstructs the artificial noise, thereby preventing an unnecessary additional white noise from being amplified in the relay.
Abstract:
PURPOSE: A method for supporting a vehicle communication handover is provided to perform a stable media access based on contention free through a WPCF(WAVE Point Coordination Function) channel access method. CONSTITUTION: A first RSU(Roadside Unit)(100a) receives vehicle information from a first vehicle(200a) which newly enters into a coverage of the first RSU. The first RSU transfers the channel access sequence to the first vehicle. If the first vehicle request a handover, the first RSU transfers the handover information about the first vehicle to a second RSU through a WAVE handover control unit. The second RSU receives the vehicle information from the first vehicle. According to the vehicle information, the second RSU allocates the vehicle access order.
Abstract translation:目的:提供一种用于支持车辆通信切换的方法,以通过WPCF(WAVE Point Coordination Function)通道访问方法,基于无竞争性来执行稳定的媒体访问。 构成:第一RSU(路侧单元)(100a)从新进入第一RSU的覆盖范围的第一车辆(200a)接收车辆信息。 第一RSU将信道接入序列传送到第一车辆。 如果第一车辆请求切换,则第一RSU通过WAVE切换控制单元将关于第一车辆的切换信息传送到第二RSU。 第二RSU从第一车辆接收车辆信息。 根据车辆信息,第二RSU分配车辆访问命令。
Abstract:
PURPOSE: A method for performing digital voice communication is provided to transceive a voice by using a data communication service method between a wire terminal and a wireless terminal without correcting a mobile communication system of a communication provider, thereby enhancing clear and safe voice quality. CONSTITUTION: A wireless terminal(40) performs a voice communication service and a data communication service by using a CDMA system. A mobile communication network(42) transmits data between the wireless terminal(40) and an IWF(44). The IWF(44) processes data connections between the mobile communication network(42) and a wire communication network(46). The wire communication network(46) transmits data between the IWF(44) and a wire terminal(48), and includes an exchange. The wire terminal(48) comprises as follows. A voice communication processor(48d) performs the voice communication service. A vocoder(48a) encodes/decodes a voice signal/voice data. An input/output unit(48b) inputs/outputs the voice data. A controller(48c) determines to perform either of the voice communication service and the data communication service.