Abstract:
PURPOSE: A main hub which communicates in a Wireless Body Area Network (WBAN) including at least one supplementary hub, and a supplementary hub, a sensor node, and a communication method thereof are provided to continuously operate a WBAN system in the absence of a main hub by using at least one supplementary hub. CONSTITUTION: A slot allocation unit (1220) allocates beacon slots to a main hub and at least one supplementary hub. A receiving unit (1230) receives a beacon signal based on the beacon slots from a supplementary hub which is determined as a target hub among at least one supplementary hub by at least one sensor node. An identification unit (1230) identifies whether the supplementary hub, which is determined as a target hub using the beacon signal, contains data which is transmitted to the main hub or not. An uplink section allocation unit (1250) allocates an uplink section in order to transmit the data to the determined target supplementary hub according to the identification result. [Reference numerals] (1210) Transmitting unit; (1220) Slot allocation unit; (1230) Receiving unit; (1240) Identification unit; (1250) Uplink section allocation unit; (1260) Connection unit
Abstract:
PURPOSE: A receiver and a transmitter which response to an interference signal in a super generative communication system and a method using the same are provided to deviate from the influence of the interference signal. CONSTITUTION: A resonance frequency controller(410) controls a resonance frequency which is related with a filtering band about a signal which is received from a transmitter. An oscillation signal generator(420) generates an oscillation signal according to a positive feedback amplification mode based on the resonance frequency or the signal. An oscillation property detector(430) detects the property of the oscillation signal. A determining unit(440) determines whether the signal includes an interference or not based on the property of the oscillation signal or the resonance frequency. A controller(450) controls the resonance frequency controller in order to control the resonance frequency based on a determined result. [Reference numerals] (410) Resonance frequency controller; (420) Oscillation signal generator; (430) Oscillation property detector; (440) Determining unit; (450) Controller; (460) Interference source; (480) Signal detector
Abstract:
PURPOSE: A communication system is provided to recognize the type of a noise source in a communication system and to match the noise source. CONSTITUTION: A receiving unit(810) receives distribution information of one or more logic values in an OOK(On-Off Keying) type or an FSK(Frequency Shift Keying) type. A setup unit(820) sets up a threshold value. A sensing unit(830) senses the distribution of a logic value. A determining unit(840) determines the type of a noise source.
Abstract:
PURPOSE: A layer cell communication system which uses a feedback method according to a class of an access network is provided to use wireless resource for feedback information or use respectively different code books. CONSTITUTION: An object terminal selects a first codebook for a previously stored macro base station and a second codebook for a base station(621). The object terminal assigns feedback resource corresponding to the second code book(622). The object terminal generates feedback information related to the channel of the object terminal by using the object terminal(624). The object terminal transmits the feedback information by using the allocated feedback resources to the small base station(625).
Abstract:
PURPOSE: A cooperative interference control system between multi cells performing JP(Joint Processing) technique without the reduction of the capacity is provided to cooperatively control interference between multi cells by allocating resource. CONSTITUTION: A resource allocation unit(310) allocates a first frequency in the center of a neighbor cell related to the neighboring base center. The resource allocator assigns the second frequency to an edge area of the adjacent cell. In case the terminal is located in the edge region of the adjacent cell, an interference control unit(320) transmits and receives scheduling information and channel information to the terminal through the second frequency.
Abstract:
A portable device for processing a multimedia signal and a method using the same are provided to increase the service satisfaction of users by transmitting a decoded multimedia signal to an external display device. A multimedia signal receiver(210) receives from a mobile terminal a multimedia signal that the mobile terminal receives from a service providing sever. A decoding related information generator(220) generates decoding related information which is concerned with at least one of codec or definition. According to the decoding related information, a decoder(230) decodes the multimedia signal, and generates multimedia information. A multimedia information transmitting unit(240) transmits the multimedia information to an external display device.
Abstract:
A base station, a mobile station and a control method thereof for performing the wireless communication removing wireless communication anomaly phenomenon in a wireless mobile communication system are provided to improve the capacity of the entire cells. The wireless communication unit(101) of a base station performing wireless communication with the base station performs wireless communication through a cellular channel. A determining unit(103) of the base station uses received CQI information. A wireless telecommunication anomaly phenomenon generated between the mobile station and base station is determined. A communication unit of a base station(111) performs wireless communication through a cellular channel. The wireless communication through the cellular channel which a communications unit of a mobile station performing the base station and wireless communication is already set up with the base station. A controller(114) blocks communications through the cellular channel.
Abstract:
A link adaptation system using a doppler frequency and a method thereof are provided to determine an SNR interval by using the doppler frequency, thereby reducing the number of measuring SNR. A link adaptation system comprises a doppler frequency prediction unit(310), an SNR prediction interval determination unit(320), an SNR(Signal to Noise Ratio) measurement unit(330) and an MCS(Modulation Coding Scheme) level selection unit(340). The doppler frequency prediction unit predicts a doppler frequency of a signal transmitted through a radio channel. The SNR prediction interval determination unit determines an SNR interval to the signal transmitted through the radio channel based on the doppler frequency. The SNR measurement unit measures SNR of the signal in consideration of the determined SNR measurement interval.
Abstract:
An apparatus and a method for storing handover information are provided to generate handover information based on a signal received from a terminal and to broadcast the handover information by using beam-forming at a specific region within a base station. An estimation unit(210) estimates an incident direction of a received signal for a first base station based on a signal received form terminals(240,250) which belong to the first base station. Here, the estimated incident direction is related to the specific region within the coverage range of the first base station at which a terminal is placed. In case that the terminal performs the handover to a base station near the first base station, a storage unit(220) stores the estimated incident direction as the handover information related to the base station to which the handover is performed. In addition, the storage unit creates the information of at least one base station, to which handover is performed from the first base station, as beam-forming information. A transmission unit(230) transmits the information of at least one base station in the incident direction based on the beam-forming information.
Abstract:
본 발명은 데이터 전송 실패가 채널 오류로 인한 실패인지 데이터 충돌로 인한 실패인지 판단하여 충돌로 인한 전송률 감소 또는 전송률 증가의 지연을 줄이는 전송률을 제어하는 무선랜 장치 및 방법에 관한 것으로, 충돌에 의한 데이터 전송 실패를 검출하여 충돌로 인한 전송률 감소를 줄이고, 미리 정한 횟수 이상의 데이터 전송 실패시 RTS/CTS 교환기법을 이용하여 데이터를 재전송하는 충돌을 고려하여 전송률을 제어하는 무선랜 장치 및 방법에 관한 것이다. 무선랜(WLAN), link adaptation, RTS(Request-To-Send) / CTS(Clear-To-Send) 교환 기법, ARF(Automatic Rate Fallback), 전송률(Transmission rate)