Abstract:
본 발명은 하이브리드 자동 반복 요구(Hybrid Automatic Repeat reQuest: HARQ) 방식을 지원하는 디바이스간 직접 통신(Device to Device: D2D) 무선 통신 시스템에서 기지국의 멀티캐스트 서비스 제공 방법에 있어서, 멀티캐스트 서비스 그룹에 포함되어 있는 이동 단말기들이 사용할 자동 재전송 횟수와, 멀티캐스트 서비스 데이터 패킷을 멀티캐스트하는 과정을 포함하며, 상기 자동 재전송 횟수는 상기 멀티캐스트 서비스 그룹에 포함되어 있는 이동 단말기들이 상기 멀티캐스트 서비스 데이터 패킷을 성공적으로 수신하였을 경우, 상기 멀티캐스트 서비스 데이터 패킷을 자동적으로 재전송하는 횟수를 나타냄을 특징으로 한다.
Abstract:
A method for providing multi-cast services using a mobile terminal in a device to device (D2D) wireless communications system capable of supporting hybrid automatic repeat request (HARQ) method, comprises the steps of: receiving a multi-cast service data packet from a base station or a first mobile terminal which at least is another mobile terminal among mobile terminals included in the same multi-cast service group as the mobile terminal; receiving a negative acknowledgement signal (NACK) from a second mobile terminal which at least is another terminal except for the first mobile terminal among the mobile terminals in the same multi-cast service group as the mobile terminal when the decoding of the multi-cast service data packet is successful and the number of retransmission does not reach the maximum number of retransmission; generating an additional multi-cast service data packet using an modulation and coding scheme (MSC) level which is different from the MCS level applied to the multi-cast service data packet received from the base station when the decoded multi-cast service data packet is the multi-cast service data packet received from the base station; and transmitting the additional multi-cast service data packet to the second mobile terminal. [Reference numerals] (511) Receiving multicast service data packet; (513) Decoding successful?; (515,521) Reached the maximum number of retransmission?; (517) Determining reception failure; (519) Transmitting an NACK signal; (523) Standby for receiving the NACK signal; (525) NACK signal received?; (527) Transmitting additional multicast service data packet; (AA) Start; (BB,DD,GG,JJ) No; (CC,EE,FF,II) Yes; (HH,KK) End
Abstract:
PURPOSE: An RFID(Radio Frequency Identification) sensor tag with an auditory notification function and a processing method thereof are provided to attach the RFID sensor tag to a management object article and to monitor a surrounding environment during a distribution process of the article, thereby providing an environmental history of the article. CONSTITUTION: A signal processing device(1) stores a condition generating an event according to a signal inputted through an antenna(3) and determines the status of an event by comparing a sensor data signal outputted from at least one sensor(4) with a predetermined setting value. If an event is generated, the signal processing device outputs a driving signal. An auditory notification device(2) generates and outputs an auditory notification signal according to the driving signal. [Reference numerals] (1) Signal processing device; (100) RFID sensor tag; (11) RF signal processing part; (12) Tag function control part; (13) Sensing signal interface part; (14) Auditory notification driving part; (15) Memory; (16) Power supply part; (2) Auditory notification device(buzzer); (3) Antenna; (4) Sensor(temperature, humidity, illumination, pressure); (5) Power supply
Abstract:
본 발명은 동기식(SDH) 디지털 전송 장치 중 중계기의 클럭 체계를 중심으로 한 다중화 방식 및 그 장치에 관한 것으로, 위상고정루프를 이용한 신호 전달 방식을 제안함으로써 종래의 방식에서 주로 사용되는 탄성 버퍼의 필요성을 배제하고 종래의 방식에서 고속 다중부에서 클럭을 내주고 저속다중부에서 신호를 되돌려 받는 방식에서 생기는 소자의 지연문제를 완화시키는 클럭 공급 수단을 제공한다.
Abstract:
PURPOSE: A method for managing location data and photograph contents using portable terminal is provided to improve user convenience of user by storing the related contents related to the location information. CONSTITUTION: A photograph is recorded(S10). The photo information is saved in the photograph storage table with ID and picture file name(S12). The GPS information of the portable terminal is obtained(S14). The location information acquired is saved in the converting table(S16). Photo image data of the photograph storage table and location information of the location information translation table are connected(S18).
Abstract:
Disclosed are an RFID sensor tag supporting dual mode logging, an RFID sensor reader, and a method for controlling the same. The RFID sensor tag according to an embodiment of the present invention supports a dual mode executing a scheduling logging mode which records sensing data at preset intervals and an alarm event logging mode which records the sensing data under a preset alarm condition, and comprises a control unit which records the sensing data in a memory during operation of the corresponding mode; and the memory which has sensing data recording regions separated by mode.
Abstract:
본 발명은 광대역 무선 통신 시스템에서 기저 대역 신호가 중간 주파수 대역(Immediate Frequency; IF) 및 무선 주파수 대역(Radio Frequency; RF) 신호로 변화할 때 대역내 이득 평탄도 및 위상 특성이 열화되는 현상을 개선 하는 방법 및 장치가 개시된다. 구체적으로 부대역 추출기를 이용하여 광대역 신호를 복수개의 부대역 신호로 분할하고 기저대역에서 각 부대역별 신호들의 이득 및 위상 지연을 선보상하고 다시 하나의 광대역 신호로 결합함으로써 IF, RF 신호를 거치면서 발생하는 대역내 이득 평탄도 및 위상 지연 평탄도 열화 현상을 개선할 수 있다.
Abstract:
PURPOSE: A food quality managing method of a smart refrigerator is provided to record surrounding environment information in an own-memory so that a final customer purchases food by grasping an environmental history of a distribution process of each food by using a sensor reader. CONSTITUTION: A food quality managing method of a smart refrigerator is as follows. Food management information is obtained from a sensor tag attached on food(S310). Distribution environmental information is obtained from the sensor tag attached on the food(S320). Current environmental information is obtained from the sensor tag attached on the food(S330). Freshness of the food is calculated based on the food management information, the distribution environmental information, and the current environmental information(S340).